JP6510595B2 - Slash molding apparatus and sealing method for slush molding - Google Patents

Description

  The present invention relates to a slush molding apparatus, a seal member for slush molding, and a sealing method for slush molding, which are used, for example, in the manufacture of skin-like members such as a skin material constituting an instrument panel of a car.

  2. Description of the Related Art In the related art, for example, a technique of slush molding using a powder material of a resin as a raw material is known for the production of a skin-like member such as a skin material constituting an instrument panel of a car. For slush molding, a mold as a mold and a reservoir tank that accommodates the powder material in a box-like housing portion with an open top and receives the mounting of the mold and causes the powder material to be exposed on the molding surface of the mold. The apparatus configuration provided is used. The slush molding is performed, for example, in the following process.

  First, the mold is previously heated to, for example, about 230 ° C. by a predetermined means, and the heated mold is attached to the reservoir tank containing the powder material, and the mold and the reservoir tank are united. The mold is attached to the reservoir tank so that the molding surface side is directed to the powder material side stored in the reservoir tank and the opening side of the reservoir tank is closed. In the state where the mold and the reservoir tank are united, the mold and the reservoir tank form an integral internal space including the accommodation space of the accommodation portion of the reservoir tank. This internal space is a moving space for the powder material.

  That is, by rotating the mold and the reservoir tank integrated with each other, the powder material in the reservoir tank is moved to the molding surface side of the mold. As a result, the powder material in contact with the molding surface of the mold is melted by the heat of the mold and adhered and formed along the molding surface. After molding the resin material, the excess powder material is moved into the reservoir of the reservoir tank by returning the rotational positions of the mold and the reservoir tank. Then, after the molten resin material is cured by cooling the mold to, for example, about 40 ° C., a peel-like member such as a skin member of an instrument panel is obtained as a molded article by removing it from the molding surface .

  In such slush molding, in order to prevent the powder material from leaking out from the internal space when the combined construction of the mold and the reservoir tank is rotated, the mold and the reservoir tank which define the internal space are formed. The contact portion (abutment portion) is provided with a seal for sealing the internal space. As such a seal portion, a structure in which a seal member made of an elastic material such as rubber is interposed in a contact portion of the reservoir tank with the mold is used (see, for example, Patent Document 1).

  As disclosed in Patent Document 1, the seal member is attached to the opening edge of the reservoir tank having the mold side as the opening side. And in patent document 1, it has a hollow part for injecting a fluid in the part which contacts a mold as a sealing member, and in the cross section, the surface side used as the contact side to a mold is semicircle shape. Also, a sealing material having a shape in which the opening edge portion of the reservoir tank is sandwiched with the side opposite to the contact side being bifurcated is disclosed.

Patent No. 5619679 gazette

  In the slush molding as described above, the mold is gradually deformed as an influence over time because the temperature change due to heating and cooling is repeated. The deformation of the mold is a permanent deformation and is mainly a deformation in the expansion direction, that is, a deformation in a direction to widen the gap between the reservoir tank. The amount of deformation of the mold is more pronounced as the size of the mold is larger.

  Therefore, according to the conventional seal member as described above, the deformation amount of the mold may be larger than the deflection amount of the seal member. That is, according to the conventional seal member, it may not be possible to obtain a sufficient amount of deflection to follow deformation of the mold as a permanent strain. On the other hand, in order to increase the amount of deflection of the seal member, it is conceivable to lengthen the vertical dimension in the deflection direction of the seal member, but if the seal member is simply elongated, the seal member may buckle as a whole As a result, the bending deformation of the seal member is not stable, and a good sealability can not be obtained.

  As described above, when the deformation amount of the mold becomes larger than the deflection amount of the seal member, a gap is generated between the seal member and the mold, and the gap is generated when the combined configuration of the mold and the reservoir tank is rotated. There is a problem that powder material leaks from the outside. Leakage of the powder material to the outside leads to poor quality of the molded product and a reduction in yield.

  The present invention has been made in view of the above problems, and in the seal member provided between the mold and the reservoir tank in slush molding, the seal member provided between the mold and the reservoir tank by deformation of the mold. Slash molding that can obtain a sufficient deflection amount to follow changes in the clearance of the powder, can prevent the powder material from leaking to the outside, and can improve the quality of the molded product and the yield An apparatus, a seal member for slush molding, and a sealing method for slush molding are provided.

  The slush molding apparatus according to the present invention is a slush molding apparatus for molding a skin-like member, which comprises a mold having a molding surface, a powder material, and the attachment of the mold to receive the mold together with the mold. A reservoir tank forming a moving space for powder material, and a seal member attached to an edge of the reservoir tank facing the partition portion of the moving space in the mold and sealing between the mold and the reservoir tank A contact side cylindrical portion forming a contact portion with the mold and forming a cavity along the longitudinal direction of the seal member; and the reservoir tank relative to the contact side cylindrical portion And an intermediate space forming portion which is provided on the attachment side to the edge portion of the housing and which forms a space along the longitudinal direction of the seal member together with the contact side cylindrical portion. A.

  Further, in another aspect of the slush molding apparatus according to the present invention, in the slush molding apparatus, the contact side cylindrical portion faces a top surface portion forming a contact surface with the mold and a width direction of the seal member. The contact surface includes a pair of side surface portions, and a partition surface portion facing the top surface portion, which partitions the cavity of the contact side cylindrical portion and the space formed by the intermediate space forming portion, and the contact surface includes It is formed in a planar shape, and is formed so as to form an angle with the outer wall surface of the contact side cylindrical portion.

  Further, in another aspect of the slush molding device according to the present invention, in the slush molding device, the top surface portion is formed thicker than the side surface portion.

  Further, in another aspect of the slush molding apparatus according to the present invention, in the slush molding apparatus, the side surface portion is a thin portion having a smaller thickness than other portions in a part of the sealing member in the vertical direction. It is possessed.

  Further, in another aspect of the slush molding device according to the present invention, in the slush molding device, the side wall portion has an outer wall surface which is flat along the vertical direction of the seal member, and The wall surface is a curved surface whose convex side is the outside in the width direction in the vertical direction, so that the wall thickness is gradually reduced from the both end portions to the central portion in the vertical direction.

  Further, in another aspect of the slush molding apparatus according to the present invention, in the slush molding apparatus, the dimension of the intermediate space forming portion in the width direction of the seal member is the dimension of the contact side cylindrical portion in the width direction. It is bigger than.

  Further, in another aspect of the slush molding apparatus according to the present invention, in the slush molding apparatus, the intermediate space forming portion includes a pair of side wall portions facing each other in the width direction of the seal member, In the seal member, a thin-walled portion having a thickness smaller than that of the other portion is provided in a portion in the vertical direction of the seal member.

  Further, in another aspect of the slush molding apparatus according to the present invention, in the slush molding apparatus, the intermediate space forming portion includes a pair of side wall portions facing each other in the width direction of the seal member, The center portion in the vertical direction is a curved surface including a sloped surface substantially symmetrical in the vertical direction, and a convex surface on the outer side in the width direction in the vertical direction. , The thinnest part.

  Further, in another aspect of the slush molding device according to the present invention, in the slush molding device, the seal member has a holding portion for holding an edge portion of the reservoir tank, and the intermediate space forming portion is The side wall portion is a portion continuous with the holding piece portion forming the holding portion, and the side wall portion is formed on the contact side cylindrical portion together with the holding piece portion. It has a leg extending downward, and at least a part of the leg is cut away in order to bend or bend the seal member in the longitudinal direction. It is a thing.

The seal member for slush molding according to the present invention is between a mold having a molding surface and a reservoir tank that accommodates a powder material and receives the mold and forms a transfer space of the powder material with the mold. A seal member for slush molding, which is a seal member for slush molding, which is a contact portion with respect to the mold and which forms a cavity along the longitudinal direction of the seal member; An intermediate space forming portion provided on the attachment side to the edge of the reservoir tank and forming a space along the longitudinal direction of the seal member with the contact side cylindrical portion, and a sandwiching portion sandwiching the edge of the reservoir tank When, was perforated, the intermediate space forming part is made of a pair of side wall portions opposed in the width direction of the seal member, the side wall portion, the vertical direction of the sealing member Some, wall thickness and has a thin walled portion to the other portion.

The sealing method for slush molding according to the present invention comprises: a mold having a molding surface; and a reservoir tank that accommodates a powder material and receives the mold and forms a transfer space for the powder material with the mold. A sealing method for slush molding, wherein as a member for sealing between the mold and the reservoir tank, the contact forming a contact portion with the mold and forming a cavity along the longitudinal direction of the seal member A sealing member having a side cylindrical portion, and a pair of leg portions extending on the side of attachment to the edge of the reservoir tank with respect to the contact side cylindrical portion and facing in the width direction of the sealing member; used, the between the mounting side of the portion of the pair of legs, while being nipped the edge of the reservoir tank facing the partition portions of the movement space in said mold, said Li Said sealing member attached to Batanku, the leg side portion of the contact-side cylindrical portion, the portion of the contact-side cylindrical portion of said pair of legs, and by the edge, the longitudinal of said seal member It forms a cavity along the direction.

  Further, in another aspect of the seal method for slush molding according to the present invention, in the seal method for slush molding, at least a part of the leg in the longitudinal direction when attaching the seal member to the edge portion. The seal member is bent or curved in the longitudinal direction so as to follow a small R portion of the edge in the longitudinal direction by forming a cutout portion in which a part of the portion is cut away.

  According to the present invention, for the seal member provided between the mold and the reservoir tank in slush molding, the amount of deflection sufficient to follow the change in the gap between the mold and the reservoir tank due to the deformation of the mold. Can be obtained, the powder material can be prevented from leaking to the outside, and the quality and yield of molded articles can be improved.

It is a sectional view showing the composition of the slash molding device concerning one embodiment of the present invention. It is a figure which shows the skin type | mold of the slush molding apparatus which concerns on one Embodiment of this invention, and a rotating frame. It is a figure showing a reservoir tank and a rotating frame of a slush molding device concerning one embodiment of the present invention. It is an explanatory view about an example of the slash molding method concerning one embodiment of the present invention. It is a partial cross section which shows the structure of the seal part in the slush molding device concerning one embodiment of the present invention. It is a partially sectioned perspective view which shows the structure of the seal part in the slush molding device concerning one embodiment of the present invention. It is a cross-sectional view of the seal rubber which concerns on one Embodiment of this invention. It is an explanatory view about a seal part by seal rubber of a comparative example to seal rubber concerning one embodiment of the present invention. It is explanatory drawing about the deformation | transformation aspect of the seal rubber which concerns on one Embodiment of this invention. It is an explanatory view about an operation effect by seal rubber concerning one embodiment of the present invention. It is a figure which shows an example of the usage condition of the seal rubber which concerns on one Embodiment of this invention. It is a figure which shows the modification of the seal rubber which concerns on one Embodiment of this invention. It is a figure which shows the use aspect about the modification of the seal rubber which concerns on one Embodiment of this invention. It is a figure which shows the other structural example of the modification of the seal rubber which concerns on one Embodiment of this invention. It is a figure showing the graph showing one example of the relation between the amount of bending of seal rubber concerning the example of the present invention, and load.

  The present invention relates to a technique of slush molding for molding a skin-like member using a resin powder material as a raw material, and devises a structure of a seal member for sealing between a mold and a reservoir tank containing the powder material. By doing this, the amount of deflection of the seal member can be efficiently increased, and changes in the gap between the mold and the reservoir tank due to thermal deformation of the mold can be tracked, and the powder material is prevented from leaking to the outside Therefore, it is intended to improve the quality and yield of molded articles. Hereinafter, embodiments of the present invention will be described.

  In the embodiment of the present invention, as an example of a skin-like member as a molded product by slush molding, a skin material constituting an instrument panel which is an interior structure of a car will be described as an example. The instrument panel is a relatively soft member which is a relatively hard member formed by injection molding using, for example, a synthetic resin such as PP (polypropylene) as a raw material, and a molded product by slush molding and is relatively soft. A three-layer structure of a skin material and a foam foam-formed of a foam resin material such as polyurethane between the base material and the skin material is formed. However, the present invention is widely applicable to slush molding in which a skin-like member is molded using a powder material as a raw material, for example, slush molding using a skin material of door trim of an automobile as a molded article besides the skin material of an instrument panel. .

  First, the configuration of the slush molding apparatus 1 according to the present embodiment will be described using FIGS. 1, 2 and 3. As shown in FIGS. 1 to 3, the slush molding apparatus 1 according to the present embodiment is for molding a skin material constituting an instrument panel, and is a skin type as a mold having a molding surface 2 a. And a reservoir tank 3 which accommodates the powder material 4 and receives the attachment of the skin type 2 to form the transfer space 8 of the powder material 4 together with the skin type 2. The cross-sectional views shown in FIGS. 1, 2 (b) and 3 (b) are cross-sectional views taken along the line A-A shown in FIGS. 2 (a) and 3 (a).

  The skin type 2 is a nickel electroformed mold or the like excellent in heat conductivity, and is configured as a plate-like member having a three-dimensional uneven shape corresponding to the shape of the skin material along the outer shape of the instrument panel as a whole. It is done. The surface mold 2 has a concave surface in its entire shape as a molding surface 2a. The skin type 2 according to the present embodiment has molding surface portions 2b corresponding to each skin material at two points in point symmetry in plan view so that two skin materials are simultaneously molded on the molding surface 2a.

  The skin type 2 has a rectangular outer shape in plan view as shown in FIG. 2 (a), and the molding surface 2b is formed on each of two sides divided in the short side direction (left and right direction in FIG. 2 (a)). Have. The skin type 2 has a flange portion 2c having a substantially constant width, which is a horizontal plate-like portion, along the rectangular plan view outer shape. The flange portion 2c is orthogonal to the vertical side wall portion 2d which is the peripheral portion of the portion forming the molding surface 2a at the lower end (lower side in FIG. 2B) of the skin mold 2 It is formed in a bent manner.

In the following description, in the slush molding apparatus 1, the lateral direction (left and right direction in FIG. 2A) in the rectangular plan view outer shape of the skin type 2 is the left and right direction, and the longitudinal direction in FIG. a vertical direction) in the longitudinal direction of definitive (a), the and the skin type 2 and the reservoir tank 3 is the direction opposite the (vertical direction in FIG. 1) and the vertical direction.

  The reservoir tank 3 has a tank main body 3a, which is a housing formed in a box shape with the upper side open, and accommodates the powder material 4 in the tank main body 3a. The reservoir tank 3 is made of, for example, a material such as aluminum or an epoxy resin. The tank body 3a has a rectangular outer shape in plan view as shown in FIG. 3A, and substantially the entire opening range on the upper side thereof fits within the range of the molding surface 2a of the skin type 2 in plan view. It is provided as.

  The reservoir tank 3 receives the attachment of the skin type 2 and constitutes an integral rotating body together with the skin type 2. That is, the skin type 2 and the reservoir tank 3 are configured to be rotatable around a predetermined rotation axis O1 along the front-rear direction by a rotation support device (not shown) using a motor etc. as a drive source in a state where they are united. There is.

  The skin type 2 has its molding surface 2 a side directed to the powder material 4 side (lower side) accommodated in the tank main body 3 a of the reservoir tank 3 so that the opening side of the tank main body 3 a is closed. It is attached. That is, the skin type 2 and the reservoir tank 3 are united in a state where the molding surface 2a side and the opening side of the tank main body 3a are opposed to each other, and the powder material 4 in the tank main body 3a is faced to the molding surface 2a. In a state where the skin type 2 and the reservoir tank 3 are united, the skin type 2 and the reservoir tank 3 form an integral internal space including the storage space of the tank body 3 a. This internal space is a moving space 8 for the powder material 4. In the movement space 8 of the powder material 4, the rotation axis O1 of the combined configuration of the skin type 2 and the reservoir tank 3 is located.

  A rotary frame 5 is interposed between the skin type 2 and the reservoir tank 3 which are combined with each other. That is, the skin type 2 and the reservoir tank 3 are fixed to each other via the rotary frame 5. The rotary frame 5 is formed in a rectangular frame shape in a plan view along the flange portion 2c of the skin type 2 by a tubular member having a rectangular cross section.

  The rotary frame 5 is vertically sandwiched by the flange portion 2c of the skin type 2 and the support arm portion 3c provided on the reservoir tank 3 so as to protrude outward from the upper end portions of the left and right side walls 3b of the tank body 3a. In the state, it is interposed between the skin type 2 and the reservoir tank 3. The support arm portions 3c are provided at three locations separated by a predetermined distance in the front-rear direction on each of the left and right side walls 3b (see FIG. 3A).

  The skin type 2 and the reservoir tank 3 are fixed to the rotary frame 5 by the clamp mechanism 6 respectively. The clamp mechanism 6 is a toggle clamp mechanism having a clamp lever 6a as an operation part for switching between clamp and unclamp. Among the clamp mechanisms 6, the clamp mechanism 6A for the skin type 2 clamps the flange portion 2c of the skin type 2 to the rotary frame 5, and the clamp mechanism 6B for the reservoir tank 3 The support arm 3 c is clamped to the rotary frame 5. A known mechanism is used as the clamp mechanism 6, and thus the detailed description of the clamp mechanism 6 is omitted.

  In the slush molding apparatus 1 according to the present embodiment, four clamp mechanisms 6A for the skin type 2 and three clamp mechanisms 6B for the reservoir tank 3 are provided for the left and right sides 5a of the rotary frame 5, respectively. The portions are alternately arranged at predetermined intervals in the front-rear direction. The clamp mechanism 6A for the skin type 2 and the clamp mechanism 6B for the reservoir tank 3 are configured to be substantially vertically symmetrical. In the following description, the combined structure of the skin type 2 and the reservoir tank 3 provided so as to be united with each other through the rotary frame 5 by the clamp mechanism 6 and rotatable about the predetermined rotation axis O1 "

  In the slush molding apparatus 1, in order to prevent the powder material from leaking to the outside or the like during rotation of the mold / tank combination structure, the skin type 2 and the reservoir tank 3 which define the internal space of the mold / tank combination structure. A seal portion 7 is provided at the contact portion (contact portion). The seal portion 7 is provided endlessly (annularly) along the outer shape of the skin material (the outer shape of the molding surface portion 2b) in plan view and along the uneven shape of the skin type 2 in the left and right molding surface portions 2b of the skin type 2 It is done. That is, the seal portion 7 forms a boundary between the molding region of the skin material (the molding surface portion 2b) and the outer region thereof in the molding surface 2a of the skin type 2 in the mold / tank combination configuration. The seal portion 7 interposes the seal rubber 10 as a seal member (slash molding seal member) made of an elastic material such as rubber on the contact portion of the reservoir tank 3 with the skin type 2. Specifically, it is as follows.

  The seal rubber 10 is attached to the upper end portion of the partition wall 11 provided on the upper side of the tank body 3 a in the reservoir tank 3. The partition wall 11 has an outer wall 11a extending upward from the upper opening edge of the tank body 3a and an inner wall 11b located above the opening of the tank body 3a. The inner side wall 11b is supported from the lower side by a support column 13 which is erected on a horizontal bridge 12 which is provided in the lateral direction between the base ends of the left and right outer side walls 11a.

  The partition 11 is a substantially plate-like portion having a predetermined shape as a whole, and the upper edge (hereinafter referred to as “partition edge”) 11 c forms an endless seal 7. The partition wall edge 11c is provided along the uneven shape of the skin type 2 and along the outer shape of the surface material (the outer shape of the molding surface 2b) in plan view. That is, partition edge portion 11 c is an end of partition 11 in contact with molding surface 2 a of skin type 2, and is attached with seal rubber 10, and from the lower side to skin type 2 via seal rubber 10. By contacting, the seal part 7 is configured.

  Thus, in the present embodiment, the partition edge 11 c corresponds to the edge of the reservoir tank 3. That is, the seal rubber 10 is attached to the partition edge 11 c facing the section of the moving space 8 of the powder material 4 in the skin type 2, and seals between the skin type 2 and the reservoir tank 3.

  The seal rubber 10 is an elongated member having a constant cross-sectional shape, and is provided endlessly so as to cover the entire seal portion 7. The seal rubber 10 is formed by extrusion or the like using a silicone rubber excellent in heat resistance as a raw material.

  The powder material 4 as a raw material of the skin material is a material generally used in slush molding, for example, vinyl chloride resin powder, resin powder of olefinic thermoplastic elastomer (TPO), polyurethane thermoplastic elastomer ( Resin powder of TPU).

  Next, an example of a slush molding method performed by using the slush molding apparatus 1 according to the present embodiment will be described with reference to FIG. In addition, illustration of the clamp mechanism 6 is abbreviate | omitted in FIG.

  First, as shown in FIG. 4A, the skin mold 2 is placed in a heating furnace 14 and exposed to hot air, for example, at about 480 ° C., to heat it to, for example, about 230 to 270 ° C. As means for heating the skin type 2, in addition to the heating furnace 14, for example, a pipe for circulating a heating medium such as heating oil is provided outside the skin type 2 (opposite to the molding surface 2a). The skin type may be heated by the circulating heating medium.

  Next, as shown in FIG. 4 (b), the heated skin type 2 is attached to the reservoir tank 3 containing the powder material 4 in the tank body 3a (see arrow C1), and the clamp mechanism 6 (see FIG. 1) Fixed by As a result, the heated surface mold 2 and the reservoir tank 3 containing the powder material 4 are united to obtain a mold / tank combination configuration.

  Subsequently, as shown in FIG. 4C, the mold / tank combination structure is rotated about the rotation axis O1 by a rotation support device (not shown) (see arrow C2). As a result, the powder material 4 moves in the internal space of the mold / tank combination structure by the load, and is guided to the molding surface 2 a side of the surface mold 2.

  Then, as shown in FIG. 4 (d), the powder material 4 is placed on the molding surface 2 a side of the surface mold 2 by being turned upside down by the rotation operation about the rotation axis O 1 as the mold / tank combination configuration. It moves, and it will be in the state where it touched entirely to the molding surface 2b on either side. Thereby, the powder material 4 is melted by the heat of the skin mold 2, and the resin material 4a is attached and molded along the surface shape of each molding surface portion 2b.

  After the molding of the resin material 4a, as shown in FIG. 4 (e), the rotational positions of the surface mold 2 and the reservoir tank 3 are returned to their original positions by rotational movement about the rotational axis O1 of the mold / tank combination structure. With the reservoir tank 3 positioned on the lower side and the skin mold 2 positioned on the upper side, excess powder material 4 is moved into the tank body 3 a of the reservoir tank 3.

  Then, as shown in FIG. 4 (f), releasing the clamp by the clamp mechanism 6 to remove the skin type 2 from the reservoir tank 3, for example, immersing the skin type 2 in a water tank (not shown) to apply a predetermined water pressure. The skin type 2 is cooled to a temperature of, for example, about 40 ° C. by the like. Thereby, the resin material 4a is cured, and the cured resin material 4a is released from the skin mold 2 (see arrow C3), whereby the skin material 15 of the instrument panel as a molded article is obtained.

  The surface material 15 has a concave and convex curved surface shape that matches the shape of the portion to be adhered to the base material that constitutes the instrument panel, and the outer surface thereof forms a design surface of the instrument panel. The plate thickness of the surface material 15 is, for example, about 1 mm.

  Hereinafter, in the slush molding apparatus 1 and the slush molding method according to the present embodiment as described above, the seal portion 7 and the seal rubber 10 for sealing between the skin type 2 and the reservoir tank 3 will be described in detail.

  The seal rubber 10 is an elongated member having a constant cross-sectional shape as described above, and its main configuration or form is specified by the cross-sectional shape. As shown in FIGS. 5 and 6, the seal rubber 10 is attached to the partition wall 11 with the lower side as the open side and the partition edge 11c inserted from the lower side. In the seal portion 7 and the seal rubber 10, the wall thickness direction (left and right direction in FIG. 5) of the partition wall 11 is the left and right direction, and the top and bottom direction (vertical direction in FIG. 5) of the slush molding apparatus 1 is the top and bottom direction.

  The seal rubber 10 is fixed to the partition wall 11 via the mounting bracket 16 sandwiching the partition edge portion 11c from the left and right sides. The mounting bracket 16 is a bent plate-like member having a rectangular outer shape and a predetermined bent shape, and is a flat plate-like portion which is a portion fixed to the partition wall 11, and a side view It has a locking portion 16 b which is a substantially “U” -shaped bent portion for locking the seal rubber 10.

  The mounting bracket 16 aligns the fixing portion 16a with the plate surface 11d of the partition wall 11 and directs the substantially "U" -shaped open side of the locking portion 16b to the seal rubber 10 side by the locking portion 16b. Is covered in the range of the width dimension of the mounting bracket 16. The pair of mounting brackets 16 are disposed at mutually opposing positions in a manner sandwiching the partition edge portion 11 c and the lower end of the seal rubber 10, and are fastened and fixed to the partition 11 by the bolt member 17 and the nut member 18.

  The bolt member 17 has a mounting bracket 16 positioned on one side in the left-right direction (left side in FIG. 5), a partition edge 11c positioned between fixing portions 16a of the pair of mounting brackets 16, and the other The mounting member 16 located on the side (right side in FIG. 5) is penetrated, and screwed into two nut members 18 located on the other side in the left-right direction. For this reason, bolt holes 16e and 11e for allowing the bolt members 17 to pass through are respectively formed in the mounting bracket 16 and the partition edge portion 11c. With such a fixing structure, the seal rubber 10 is fixed in a state of being positioned in the vertical direction with respect to the partition edge 11c.

  In the fixing structure of the seal rubber 10 to the partition wall 11, the bolt holes 16e of the mounting bracket 16 are long holes whose longitudinal direction is the vertical direction. Thereby, the vertical position adjustment of the mounting bracket 16 with respect to the partition wall 11 is possible, and the vertical positional adjustment of the seal rubber 10 fixed to the partition wall 11 through the mounting bracket 16 with respect to the partition wall 11 is possible. In addition, as a configuration for adjusting the position of the seal rubber 10 in the vertical direction, a configuration in which a plurality of bolt holes are provided in the vertical direction at the fixing portion 16a or the partition edge 11c, or the bolt hole 11e of the partition edge 11c The configuration may be such that long vertical holes are vertically formed. The fixing | fixed part to the partition wall 11 of the seal rubber 10 by the pair of attachment metal fittings 16 grade | etc., As mentioned above is provided in multiple places at intervals suitably about the extension direction of the seal rubber 10. As shown in FIG.

  Next, the configuration of the seal rubber 10 will be described. As shown in FIG. 5, FIG. 6 and FIG. 7, the seal rubber 10 forms a contact portion with the skin mold 2 and forms a cavity 20a along the longitudinal direction (extension direction) of the seal rubber 10 and A holding portion 22 holding the partition edge portion 11c of the reservoir tank 3 and an intermediate space forming portion 23 provided between the contact side cylindrical portion 21 and the holding portion 22 are provided.

  As described above, each portion of the seal rubber 10 is a portion that appears in the cross-sectional shape of the seal rubber 10, and is formed over the entire extending direction of the seal rubber 10 having a constant cross-sectional shape. In the cross-sectional shape of the seal rubber 10, the vertical direction is the longitudinal direction, and the seal rubber 10 has a symmetrical shape.

  The contact side tubular portion 21 is a hollow portion having a cavity 20a and is a substantially tubular portion. In particular, in the present embodiment, the contact side tubular portion 21 has a substantially square tubular outer shape.

  The sandwiching portion 22 has a pair of sandwiching portions 24 which form lower end portions on both sides of the seal rubber 10 in the width direction (left and right direction, hereinafter simply referred to as “width direction”). The pair of sandwiching pieces 24 sandwiches the upper end of the partition edge 11 c and receives the engagement of the mounting bracket 16.

  Specifically, the pinching piece portion 24 has a horizontal lower end surface 24 a which is a lower end surface of the seal rubber 10 and a vertical planar side surface 24 b which is a side surface of a lower end portion of the seal rubber 10. The corner portion between the lower end face 24a and the side face 24b is an R-shaped portion. Further, in the lower part of the seal rubber 10, in detail, at the boundary between the holding part 22 and the intermediate space forming part 23, a concave groove 25 is formed along the outer shape of the rectangular shape in cross section ing. The lower surface 25 a of the concave groove 25 is a surface that forms a substantially right-angled shape with the side surface 24 b of the sandwiching piece portion 24.

  Then, the mounting bracket 16 is fitted with the holding piece portion 24 so as to surround the holding piece portion 24 in a cross-sectional view by the substantially U-shaped locking portion 16b, that is, inside the locking portion 16b. In an aspect, it engages with the seal rubber 10. In detail, the locking portion 16b has a lower surface portion 16x, a side surface portion 16y, and an upper surface portion 16z as a substantially "U" shaped portion. Then, the mounting bracket 16 causes the lower surface portion 16x and the side surface portion 16y to face the lower end surface 24a and the side surface 24b of the sandwiching piece portion 24, respectively, and locates the upper surface portion 16z in the concave groove 25, and the end surface of the upper surface portion 16z. The seal rubber 10 is engaged with the bottom surface 25 b of the concave groove 25 in a state where the 16 c is in contact with the bottom surface 25 b.

  The sandwiching portion 22 is an example of a mounting portion of the seal rubber 10 to the partition edge 11 c. The mounting portion of the seal rubber 10 is not limited to a portion in which the partition edge portion 11c is held by the pair of holding portions 24 as the holding portion 22. The seal rubber 10 is attached in the attachment state of the seal rubber 10 to the partition edge portion 11c. It may be a portion to be supported with respect to the partition edge 11c.

Medium between space forming portion 23 is provided on the mounting side, that is clamping portion 22 side (lower side) with respect to the partition wall edge end portion 11c of the reservoir tank 3 to the contact-side cylindrical portion 21. The intermediate space forming portion 23 is a portion that forms a space 23 s along the longitudinal direction of the seal rubber 10 together with the portion on the holding portion 22 side of the contact side cylindrical portion 21. The intermediate space forming portion 23 includes a pair of side wall portions 26 opposed in the width direction of the seal rubber 10. A space 23 s is formed between the pair of side wall portions 26. The space 23s is a substantially cylindrical space whose lower side is an open side.

  The intermediate space forming portion 23 forms a cavity 20b along the longitudinal direction of the seal rubber 10 together with the portion on the holding portion 22 side (lower side) of the contact side cylindrical portion 21 and the partition edge portion 11c. That is, when the partition edge 11c is inserted between the sandwiching pieces 24 forming the sandwiching section 22, the open side on the lower side of the space 23s is closed by the partition edge 11c, and the cavity 20b is formed.

  In the example shown in FIG. 5 etc., the cavity 20b is an inner wall surface 26a which is the inner wall surface of the lower surface 21a of the contact side cylindrical portion 21 and the pair of side wall portions 26 of the intermediate space forming portion 23 and the partition edge portion 11c. And the upper end face 11 f of the horizontal shape. However, depending on the fixed position of the sealing rubber 10 in the vertical direction with respect to the partition edge 11c, the left and right plate surfaces 11d of the upper end of the partition edge 11c may be included in the surface forming the cavity 20b. The upper end of the inner side surface 24c of the

  As described above, the seal rubber 10 is formed by the cavity 20 a by the contact side cylindrical portion 21, the intermediate space forming portion 23 and the partition edge portion 11 c as the two space portions divided up and down in the seal portion 7. And the cavity 20b. That is, the seal rubber 10 has two upper and lower spaces of the cavity 20a of the contact side cylindrical portion 21 and the space 23s of the intermediate space forming portion 23, and the space between the left and right side walls 26 in addition to the upper cavity 20a. 23s forms a cavity 20b closed from below by the partition edge 11c. Thus, the seal rubber 10 has a two-layer structure of a portion forming the cavity 20a and a portion forming the cavity 20b. In the following description, the upper cavity 20a is referred to as an upper cavity 20a, and the lower cavity 20b is referred to as a lower cavity 20b.

  Below, the contact side cylindrical part 21 and the intermediate space formation part 23 which the seal rubber 10 which concerns on this embodiment has are demonstrated in detail.

  First, the contact side tubular portion 21 will be described in detail. The contact-side tubular portion 21 is a top surface portion 31 forming a contact surface with the skin mold 2, a pair of side surface portions 32 facing the width direction of the seal rubber 10, and a surface portion facing the top surface portion 31. And a partition 33 that partitions the lower cavity 20b (the space 23s).

  The top surface portion 31 is a horizontal plate-like portion that forms the upper end portion of the seal rubber 10. The upper surface 31 a of the top surface portion 31 is the upper end surface of the seal rubber 10 and is a contact surface to the surface mold 2. The upper surface 31 a of the top surface portion 31 is formed in a planar shape, and is formed to form a corner 21 d with an outer wall surface 21 b which is an outer wall surface in the width direction of the contact side cylindrical portion 21. The outer wall surface 21 b forms an upper portion of the wall surface on the outer side in the width direction of the seal rubber 10.

  In the present embodiment, the upper surface 31 a of the top surface 31 is formed in a horizontal plane. Further, the lower surface 31 b of the top surface portion 31 is also formed in a horizontal surface shape in the same manner as the upper surface 31 a. Further, the outer wall surface 21b of the contact side tubular portion 21 is a generally vertical surface as a whole, and a slope 21c forming an obtuse angle (for example, 100 to 110 °) with the top surface 31a of the top surface portion 31 at the upper end thereof. It is formed. Therefore, the upper end portion of the seal rubber 10 is formed to be gradually narrowed from the lower side to the upper side by the left and right slopes 21c. In the present embodiment, the sloped surface 21c is formed on the outer wall surface 21b in a portion that is approximately the upper half of the plate thickness of the top surface portion 31. Further, the corner formed by the upper surface 31a and the slope 21c is an R-shaped portion.

  The left and right side surface parts 32 are substantially vertical plate-like parts forming the side wall of the upper part of the seal rubber 10.

  The partition 33 is a substantially horizontal plate-like portion provided substantially parallel to the top surface 31 at a position below the top surface 31. The upper surface 33a of the partition 33 is a curved surface that protrudes downward. The partition 33 is a portion that forms the space 23 s together with the pair of side wall portions 26 of the intermediate space forming portion 23. The lower surface 33b of the partition 33 is the lower surface 21a of the contact side cylindrical portion 21 that forms the lower cavity 20b as described above.

  As described above, in the present embodiment, the contact-side tubular portion 21 has a substantially rectangular tubular shape having a substantially rectangular frame shape in the cross section of the seal rubber 10 by the top surface portion 31, the pair of side surface portions 32 and the partition wall portion 33. It is formed as a part of

  Further, in the contact side cylindrical portion 21, the top surface portion 31 is formed thicker than the side surface portion 32. That is, as shown in FIG. 7, the thickness dimension D1 of the top surface portion 31 is larger than the maximum thickness dimension D2 of the side surface portion 32.

  Further, in the contact side cylindrical portion 21, the side surface portion 32 has a thin portion 32b having a thickness smaller than that of the other portion in a part in the vertical direction. In the present embodiment, the side surface portion 32 has a central portion in the vertical direction as a thin portion 32 b.

  Specifically, the side surface portion 32 is curved such that the outer wall surface 32c is flat along the vertical direction, and the inner wall surface 32d is convex in the width direction of the seal rubber 10 in the vertical direction. By making it a surface, it has a shape in which the thickness is gradually reduced from the both ends to the center in the vertical direction. That is, with respect to the outer wall surface 32 c which is the vertical surface, the left and right side surface parts 32 have an arc-shaped curved surface whose outer side in the width direction is convex on the lateral surface of the seal rubber 10. The wall thickness is gradually reduced from the upper and lower ends to the central portion on the inner side in the vertical direction as a side displaced in the horizontal direction. The outer wall surface 32 c of the side surface portion 32 is a part of the outer wall surface 21 b of the contact side tubular portion 21.

  In the present embodiment, the minimum thickness dimension D3 of the upper and lower center portions of the thickness of the side surface portion 32 is substantially half the maximum thickness dimension D2 of the upper and lower end portions (see FIG. 7).

  In the contact side cylindrical portion 21 as described above, the upper cavity 20a has a lower surface 31b in the form of a horizontal surface, and left and right inner wall surfaces 32d which are curved surfaces having a convex arc shape in the width direction and lower sides. It is formed of an upper surface 33 a which is a convex curved surface having a circular arc shape in cross section, and has a substantially barrel shape in a cross sectional view of the seal rubber 10.

  Next, the intermediate space formation unit 23 will be described in detail. The intermediate space forming portion 23 is formed as a wide portion with respect to the contact side cylindrical portion 21. Therefore, in the seal rubber 10, the dimension E1 in the width direction of the intermediate space forming portion 23 is larger than the dimension E2 in the width direction of the contact side tubular portion 21. Here, the dimension E1 in the width direction of the intermediate space forming portion 23 is the dimension in the maximum width direction in the intermediate space forming portion 23, and the vertical outer wall surface which is the wall surface on the outer side of the left and right side wall portions 26 in the width direction. It is the dimension between 26b. Similarly, the dimension E2 in the width direction of the contact side tubular portion 21 is the maximum width dimension of the contact side tubular portion 21 and is the dimension between the outer wall surfaces 32c of the side portions 32 in the width direction.

  Further, in the intermediate space formation portion 23, a slant wall surface 26c is formed on the upper side of the outer wall surface 26b. That is, the side wall portion 26 has the vertical outer wall surface 26 b and the oblique wall surface 26 c formed on the upper side on the outer side in the width direction. The oblique wall surface 26c is a surface portion connected to the lower side with respect to the outer wall surface 21b of the contact side cylindrical portion 21, and is an inclined surface which is gradually inclined outward in the width direction from the upper side to the lower side.

  Therefore, in the seal rubber 10, from the upper side to the lower side, from the portion of the contact side cylindrical portion 21 of the dimension E2 in the width direction, the width is made via the left and right oblique wall surfaces 26c forming the shoulder portion gradually expanding the dimension in the width direction. It reaches the part of the intermediate space forming part 23 which makes the dimension E1 of the direction. The outer wall surface 26 b and the oblique wall surface 26 c of the left and right side wall portions 26 form an intermediate portion in the vertical direction of the wall surface on the outer side in the width direction of the seal rubber 10. Further, the outer wall surface 26b is located on the same virtual vertical plane as the side surface 24b of the sandwiching piece portion 24, and the concave groove 25 is formed between the outer wall surface 26b and the side surface 24b. The upper side surface 25 c of the concave groove 25 is a surface that forms a substantially right-angled shape with the outer wall surface 26 b of the side wall portion 26.

  Further, in the intermediate space forming portion 23, the side wall portion 26 has a thin portion 26d which is thinner in part in the vertical direction than other portions. In the present embodiment, the side wall portion 26 has a central portion in the vertical direction as a thin portion 26 d.

  More specifically, the side wall portion 26 includes a curved surface whose inner wall surface 26a includes upper and lower slope portions (26e, 26f) substantially symmetrical in the vertical direction and whose outer side in the vertical direction is the convex side. By doing this, the central part in the vertical direction is made the thinnest part. That is, with respect to the outer wall surface 26 b which is the vertical surface, the left and right side wall portions 26 have a curved shape in which the inner wall surface 26 a has a convex shape on the outer side in the width direction in the cross section of the seal rubber 10. The wall thickness is gradually reduced from the upper and lower ends to the central portion on the inner side as a side displaced in the left and right direction by the position in the vertical direction.

  The inner wall surface 26a of the left and right side wall portions 26 is between the upper slope 26e forming the upper part of the inner wall 26a, the lower slope 26f forming the lower part of the inner wall 26a, and the upper slope 26e and the lower slope 26f. And a curved surface portion 26g which is a central portion of the side wall portion 26. The upper slope portion 26 e is inclined so as to gradually increase the inter-surface dimension of the left and right inner wall surfaces 26 a from the upper side to the lower side. The lower slope portion 26f is inclined so as to gradually reduce the inter-surface dimension of the left and right inner wall surfaces 26a from the upper side to the lower side. The curved surface portion 26g is a surface portion that smoothly connects the upper slope portion 26e and the lower slope portion 26f, and is curved in an arc shape in which the outer side in the width direction is a convex side in the cross sectional view of the seal rubber 10. The inner wall surface 26a has a substantially vertically symmetrical shape centered on the central position of the curved surface portion 26g in the vertical direction. Moreover, the upper side slope part 26e is a surface substantially parallel to the inclined wall surface 26c formed in the upper side of the outer side wall surface 26b as mentioned above.

  In the present embodiment, regarding the thickness of the side wall portion 26, the minimum thickness dimension F1 of the upper and lower center portion is approximately 2⁄5 of the maximum dimension F2 of the dimension in the width direction (see FIG. 7).

  Further, the left and right side wall portions 26 constituting the intermediate space forming portion 23 are portions continuous with the holding piece portion 24 forming the holding portion 22, and together with the holding piece portion 24 downward with respect to the contact side cylindrical portion 21 The extended legs 27 are formed. That is, the seal rubber 10 bifurcates a portion lower than the contact side cylindrical portion 21 in a cross-sectional view in a crotch shape, and each branched portion is a leg portion 27. The seal rubber 10 holds the upper end of the partition edge 11 c between the lower ends of the left and right legs 27, whereby the contact side cylindrical portion 21 and the partition edge are formed between the upper portions of the left and right legs 27. The lower cavity 20b is formed together with the portion 11c.

  In detail, the leg portion 27 extends from the left and right sides of the lower end portion of the contact side cylindrical portion 21 so as to extend downward as the upper portion of the side wall portion 26 of the intermediate space forming portion 23. The lower portion and the lower side of the holding portion portion 24 of the holding portion 22 continuous to the lower side are extended downward as the lower portion.

  The seal rubber 10 having the above configuration is used as a member for sealing between the skin type 2 and the reservoir tank 3 in the seal method for slush molding according to the present embodiment as follows. That is, the seal rubber 10 is attached to the reservoir tank 3 in a state in which the partition edge end 11 c of the reservoir tank 3 facing the section of the moving space 8 of the powder material 4 in the skin type 2 is held between the lower portions of the pair of legs 27. The lower cavity 20b along the longitudinal direction of the seal rubber 10 is formed by the portion on the leg 27 side of the contact side cylindrical portion 21 (partition 33), the upper portion of the pair of legs 27, and the partition edge 11c. Do.

  According to the above-described slush molding apparatus 1, the seal rubber 10, and the seal method for slush molding using the seal rubber 10 according to the present embodiment, the following operation and effect can be obtained. That is, the seal rubber 10 provided between the skin type 2 and the reservoir tank 3 in slush molding has a sufficient deflection to follow the change in the gap between the skin type 2 and the reservoir tank 3 due to the deformation of the skin type 2 The amount can be obtained, the powder material 4 can be prevented from leaking to the outside, and the quality and yield of molded articles can be improved.

  FIG. 8 shows an example of a conventional seal rubber 110 as a comparative example to the seal rubber 10 according to the present embodiment. As shown in FIG. 8, the seal rubber 110 has a cavity 111 in the upper half and a groove 112 for fitting the partition edge 11 c in the lower half, and has a substantially “A” -shaped cross section Have.

  According to such a seal rubber 110, the amount of deformation in the direction of escape from the reservoir tank 3 due to the heating / cooling of the skin type 2 may be larger than the amount of deflection of the seal rubber 110. That is, according to the seal rubber 110, in some cases, it is not possible to obtain a sufficient amount of deflection to follow the deformation of the skin mold 2 as a permanent strain. In this case, a gap 120 is generated between the seal rubber 110 and the molding surface 2 a of the surface mold 2. When the gap 120 is generated, the powder material which originally moves in the space on the inner side of the seal portion by the seal rubber 110, that is, the space on the molding surface 2b side or adheres to the molding surface 2b and melts In addition, the phenomenon of leaking to the outside from the gap 120 occurs (see arrow H1). Leakage of the powder material leads to poor quality of the molded product and a reduction in yield.

  Therefore, according to the seal rubber 10 according to the present embodiment, two upper and lower space portions of the upper cavity 20a of the contact side cylindrical portion 21 and the lower cavity 20b formed by the intermediate space forming portion 23 are formed. For ten bending deformations, it is possible to obtain two-step bending deformations that crush the upper and lower space portions. Thereby, for example, in comparison with a configuration in which the dimension in the vertical direction of the seal rubber 110 is simply increased (a configuration in which the cavity 111 is vertically elongated) in order to increase the amount of deflection, the cross-sectional shape of the portion to be bent and deformed Even in the case of a longitudinally elongated shape, the bending deformation of each of the upper and lower portions, that is, the buckling deformation of the side wall portion and the like forming each space portion, is not biased in the width direction or totally bent. It is possible to increase the amount of deformation (the amount of deflection) in the vertical direction while obtaining stable deformation.

  Therefore, even with a relatively large mold such as the skin type 2 for forming the skin material 15 of the instrument panel, the seal rubber 10 follows the deformation as a permanent strain due to heating and cooling of the skin type 2 And good sealability can be obtained. As a result, the powder material 4 can be prevented from leaking out of the molding surface 2 b of the skin mold 2, and the quality of the skin material 15 can be improved and the yield can be improved.

  Specifically, in the seal portion 7 according to the present embodiment, as shown in FIG. 5, from the upper surface 31a of the top surface portion 31 of the seal rubber 10 in the vertical direction, the upper surface of the mounting bracket 16 positioned in the concave groove 25 The area G1 up to the contact position (the height position of the upper surface of the mounting bracket 16) of the portion 16z with the seal rubber 10 is the bending area of the seal rubber 10. That is, a portion of the flexed region of the seal rubber 10 becomes a portion that is pressure-deformed by receiving a load in a direction in which the seal rubber 10 is vertically compressed when the skin type 2 and the reservoir tank 3 are united. 10 follows the deformation of the skin type 2 and the sealability is maintained.

  An example of the deformation | transformation aspect of the seal rubber 10 is demonstrated using FIG. The deformation mode of the seal rubber 10 shown here is an example in which the surface in contact with the upper surface 31a of the seal rubber 10 in the molding surface 2a of the skin type 2 is a horizontal plane, and the direction of the load acting on the seal rubber 10 is the vertical direction. is there.

  When a load acts on the seal rubber 10, first, as shown in FIG. 9A, bending deformation starts mainly from the portion of the second layer in the upper and lower two-layer structure, that is, the portion of the intermediate space forming portion 23. This is attributed to the relatively thick thickness of the left and right side surface portions 32 in the first layer portion, that is, the portion of the contact side cylindrical portion 21. In the bending deformation of the intermediate space forming portion 23, the left and right side wall portions 26 are deformed so as to bend outward in the width direction, respectively.

  Subsequently, as shown in FIG. 9B, after the second layer bending deformation is almost completed, the first layer bending deformation starts. That is, the deformation is started so that the left and right side surface parts 32 constituting the contact side cylindrical part 21 bulge outward in the width direction. In addition, the partition 33 deforms so as to bulge downward. This is because the partition 33 has a horizontal lower surface 31b and an upper surface 31a which is a convex curved surface at the lower side (see FIG. 7), and has a shape in which the middle portion in the left-right direction is a thin portion. to cause.

  Then, as shown in FIG. 9C, finally, both the first layer and the second layer are bent and deformed, and the seal rubber 10 is entirely compressed in the vertical direction and is in a squashed state. In such a state, the left and right side wall portions 26 of the intermediate space forming portion 23 are bent outward in the width direction, and the upper half portion and the lower half portion are brought close to each other. In addition, the partition wall 33 is curved so as to be convex on the lower side, and the central portion in the width direction of the lower surface 31b is brought close to the upper end surface 11f of the partition edge 11c. Further, the left and right side surface portions 32 of the contact side cylindrical portion 21 are bent outward in the width direction, and lower portions of the inner wall surface 32d are brought close to each other.

  Then, as shown in FIG. 9C, in the state where the bending deformation of the seal rubber 10 is completed, the vertical movement amount J1 of the upper surface 31a from the natural state of the seal rubber 10 shown by the two-dot chain line Amount of bending.

  As described above, according to the seal rubber 10 according to the present embodiment, stepwise (two-stage) bending deformation can be obtained due to the second layer bending deformation and the first layer bending deformation. One of the structural factors that cause such stepwise bending deformation is the thickness of the side portion 32 of the contact-side cylindrical portion 21 (the thickness of the central portion in the vertical direction, see FIG. 7, dimension D3). And the thickness of the partition 33 (the thickness in the central portion in the width direction, see FIG. 7 and the dimension D4), which is the connecting portion of the second layer. As a specific dimension, for example, the thickness dimension D3 of the side surface portion 32 is 1.8 mm, and the thickness dimension D4 of the width direction central portion of the partition wall 33 is 1.5 mm.

  Each composition with which seal rubber 10 concerning this embodiment is provided, and the operation effect by it are as follows.

  In the seal rubber 10 according to the present embodiment, the contact-side cylindrical portion 21 includes the top surface portion 31, the left and right side surface portions 32, and the partition wall portion 33, and the upper surface 31a of the top surface portion 31 serving as the contact surface to the skin type 2 is a flat surface. It forms in the shape of an arc and forms a corner 21d together with the outer wall surface 21b of the contact side cylindrical portion 21 and makes the upper end part an angular shape. According to such a configuration, the yield can be stabilized, for example, in comparison with a configuration in which the contact surface to the skin type 2 is a curved surface having a convex side as in the seal rubber 110 shown in FIG. As a result, the yield can be improved.

  Specifically, as shown in FIG. 10A, in the case of a seal rubber having a curved surface 131a having a convex on the contact side as a contact surface to the skin type 2, the contact area to the skin type 2 becomes smaller. Further, due to the curved shape of the curved surface 131a, the curved surface 131a gradually opens from the contact position of the seal rubber from the contact position of the seal rubber to the inner side (the molding surface 2b side) with respect to the molding surface 2b. A substantially triangular space 140 is formed (see hatching). From these things, in the case of the seal rubber having the curved surface 131a, the seal position and characteristics by the seal rubber vary depending on the contact position with respect to the skin type 2, the deflection amount of the seal rubber, etc. As a result, the yield becomes unstable. The instability of the yield leads to a decrease in the yield because it is necessary to consider the variation in the seal position or the like by the seal rubber.

  On the other hand, as shown in FIG. 10 (b), according to the seal rubber 10 according to the present embodiment, the upper surface 31 a forming the upper end in the square shape in the seal rubber 10 contacts the skin mold 2 entirely. A sufficient contact area can be secured, and a space 140 as shown in FIG. 10A is not formed at the boundary between the sealing positions of the seal rubber 10. Therefore, the seal position can be stabilized regardless of the contact position or deflection amount of the seal rubber 10 with respect to the surface mold 2, so that the reachable range of the powder material 4 can be stabilized, and as a result, the yield can be stabilized. The yield can be improved.

  Further, in the seal rubber 10 according to the present embodiment, the top surface portion 31 is formed to be thicker than the side surface portion 32. In particular, in the present embodiment, the top surface portion 31 is formed as a portion whose thickness is thicker than other portions in the contact side cylindrical portion 21 including the partition portion 33. According to such a configuration, since the heat transmitted from the skin type 2 to the seal rubber 10 can be absorbed by the portion of the top surface portion 31, the heat conduction to the portion lower than the top surface portion 31 is suppressed. be able to. This makes it possible to suppress the deterioration of the seal rubber 10 due to the heat. As a result, the number of times of replacement and maintenance of the seal rubber 10 can be reduced, and the productivity can be improved.

  Further, by making the top surface portion 31 relatively thick, rigidity can be easily secured in the top surface portion 31 which is a contact portion to the skin mold 2, and the seal rubber 10 is bent while maintaining the shape of the top surface portion 31. The deformation can be symmetrical and stable deflection deformation. As a result, the load acting on the seal rubber 10 is stabilized, and good sealability can be obtained. In particular, from the viewpoint of obtaining stable bending deformation in the seal rubber 10, it is preferable that the lower surface 31b of the top surface portion 31 be in the same horizontal plane as the upper surface 31a.

  Further, in the seal rubber 10 according to the present embodiment, the side surface portion 32 constituting the contact side cylindrical portion 21 has the thin portion 32 b in a part in the vertical direction. According to such a configuration, since the side surface portion 32 can be intentionally buckled starting from the thin portion 32b, the bending deformation of the seal rubber 10 is caused by the portion where the thin portion 32b is provided, the thickness of the thin portion 32b, etc. Can be controlled, and stable deflection deformation of the seal rubber 10 can be obtained.

  In particular, in the present embodiment, the side wall 32 has the outer wall surface 32c vertical and the inner wall surface 32d convex outward in the width direction. Have a shape that reduces the wall thickness. According to such a configuration, in the bending deformation of the seal rubber 10, the left and right side surface parts 32 can be reliably bent (buckled) outward in the width direction, so that the first layer of the seal rubber 10 is bent The amount of deformation can be effectively increased and stable deflection deformation can be obtained.

  That is, in the bending deformation of the seal rubber 10, if the left and right side surface parts 32 are bent inward, the left and right side surface parts 32 interfere with each other, whereby the bending deformation amount in the contact side cylindrical part 21 is insufficient. It can be considered that the bending deformation is biased to either left or right. In this respect, the left and right side portions 32 do not interfere with each other by deforming the left and right side portions 32 so as to bend outward, so that the upper cavity 20 a is effectively used in the bending deformation of the seal rubber 10. As a result, it is possible to effectively increase the amount of bending, and it is possible to obtain stable bending deformation without the bending deformation being biased in the lateral direction. Thereby, since the sealing position by the seal rubber 10 can be stabilized, the yield can be stabilized as described above.

  Further, the configuration in which the side surface portion 32 has the thin wall portion 32b at the upper and lower center portions makes it easy to bend and deform the side surface portion 32 also in terms of shape and contributes to an increase in the amount of bending of the seal rubber 10. In addition, the shape which makes a part of side part 32 a thin part is not limited to this embodiment, for example, makes outside wall face 32c a curved surface which makes the width direction inner side a convex side, and the outside in side part 32 is up and down As a side displaced in the lateral direction depending on the position of the direction, the wall thickness may be gradually reduced from the upper and lower ends to the central portion.

  Further, in the seal rubber 10 according to the present embodiment, the dimension in the width direction of the intermediate space forming portion 23 (see FIG. 7, dimension E1) is greater than the dimension in the width direction of the contact side cylindrical portion 21 (FIG. 7, dimension E2) Is also configured to be large. According to such a configuration, in the bending deformation of the seal rubber 10, in the lower part of the seal rubber 10, the load transfer portion acting on the seal rubber 10 can be spread laterally to the upper part, so the load in the seal rubber 10 is stable. Thus, it becomes possible to effectively generate the stepwise bending deformation as described above.

  Further, in the seal rubber 10 according to the present embodiment, the side wall portion 26 constituting the intermediate space forming portion 23 has a thin portion 26 d in a part in the vertical direction. According to such a configuration, the side wall portion 26 can be intentionally buckled starting from the thin portion 26d, so that the bending deformation of the seal rubber 10 is caused by the portion where the thin portion 26d is provided, the thickness of the thin portion 26d, etc. Can be controlled, and stable deflection deformation of the seal rubber 10 can be obtained.

  In particular, in the present embodiment, the side wall portion 26 is a curved surface having an inner wall surface 26a including a top and bottom upper slope portion 26e and having a convex side in a width direction outside as a convex side. By doing this, the central portion in the vertical direction is made the thinnest portion. According to such a configuration, since the left and right side wall portions 26 can be reliably bent (buckled) outward in the width direction in the bending deformation of the seal rubber 10, the second layer portion of the seal rubber 10 While being able to effectively increase the amount of bending deformation, stable bending deformation can be obtained.

  That is, in the bending deformation of the seal rubber 10, if the left and right side wall parts 26 are bent inward, the left and right side wall parts 26 interfere with each other, whereby the bending deformation amount in the intermediate space forming part 23 is insufficient. It is conceivable that the bending deformation is biased to either left or right. In this respect, the left and right side wall portions 26 do not interfere with each other by bending the left and right side wall portions 26 to the outside, so that the lower cavity 20b is effectively used in the bending deformation of the seal rubber 10. As a result, it is possible to effectively increase the amount of bending, and it is possible to obtain stable bending deformation without the bending deformation being biased in the lateral direction. Thereby, since the sealing position by the seal rubber 10 can be stabilized, the yield can be stabilized as described above.

  Further, the configuration in which the side wall portion 26 has the thin portion 26 d at the upper and lower center portions thereof facilitates bending and deforming the side wall portion 26 also in terms of shape, and contributes to an increase in the amount of bending of the seal rubber 10. In addition, the shape which makes a part of side wall part 26 a thin part is not limited to this embodiment, For example, let outside wall surface 26b be a curved surface which makes the width direction inner side a convex side, and the outside in side wall part 26 is an up-down direction The wall thickness may be gradually reduced from the upper and lower ends to the central portion as a side displaced in the left and right direction according to the position of.

  Further, in the seal rubber 10 according to the present embodiment, as shown in FIG. 5, the central portion of the root portion of the side wall portion 26 with respect to the contact side cylindrical portion 21, that is, the central portion of the root portion above the leg 27 Most of the side wall portion 26 is located on the widthwise outer side of a straight line L1 connecting the point P1 located at the point P1 and the point P2 which is the position of the upper end of the contact portion of the mounting bracket 16 with the seal rubber 10. Such a structure also enables stable deflection deformation to be obtained by bending (buckling) the left and right side wall portions 26 outward in the width direction with the point P1 being the force point and the point P2 the fulcrum in the bending deformation of the seal rubber 10 Become a factor to

Further, in the sealing method for slush molding according to the present embodiment, the seal rubber 10 is attached to the reservoir tank 3 in a state in which the partition edge 11c is held between the lower portions of the pair of left and right legs 27 of the seal rubber 10. The lower cavity 20b is formed below the gap 20a with the partition 33 separated. According to such a sealing method, it is possible to form upper and lower two-stage cavities in the sealing portion 7, and it is possible to obtain stepwise (two-stage) bending deformation as described above. As a result, it is possible to obtain a sufficient amount of deflection to follow the change in the gap between the skin type 2 and the reservoir tank 3 as described above, and to prevent the powder material 4 from leaking to the outside. It is possible to improve the quality and yield of molded articles.

  In addition, as shown in FIG. 11A, the seal rubber 10 according to the present embodiment can be used such that only the first-layer portion, that is, the contact-side tubular portion 21 becomes a bending region. In the example shown in FIG. 11A, in the seal rubber 10, the partition edge 11c is inserted from the lower side so that the upper end face 11f of the partition edge 11c is in contact with or approaches the lower surface 33b of the partition 33. In the state, it is fixed to the partition edge 11 c through the mounting bracket 16.

  In such an attachment aspect of the seal rubber 10, the upper end portion of the partition edge portion 11c is in the state of entering into the lower cavity 20b. When the upper end face 11f of the partition edge 11c is in contact with the lower surface 33b of the partition 33, the left and right middle portions of the lower cavity 20b are buried by the partition edge 11c and the lower cavity 20b is divided into right and left. Become. Then, in the vertical direction, a region G2 from the upper surface 31a of the top surface 31 of the seal rubber 10 to the lower surface 33b of the partition 33 where the upper end surface 11f of the partition edge 11c contacts or approaches is the seal rubber 10 in this mounting mode. It becomes a bending area.

  The deformation aspect of the seal rubber 10 in such an attachment aspect of the seal rubber 10 is as follows. In the same manner as in the case of the modified embodiment of the seal rubber 10 described above, the direction of the load acting on the seal rubber 10 is the vertical direction.

  As shown in FIG. 11 (b), the load is applied to the seal rubber 10 to start deformation so that the left and right side portions 32 constituting the contact side cylindrical portion 21 expand outward in the width direction, respectively. . Here, the bulging deformation to the lower side of the partition 33 is restricted by the partition edge 11 c located immediately below the partition 33. Eventually, only the first layer portion is bent and deformed, and only the first layer portion is compressed in the up and down direction to be in a squeezed state. The left and right side surface portions 32 of the contact side cylindrical portion 21 are bent outward in the width direction, and lower portions of the inner wall surface 32d are brought close to each other.

  Then, as shown in FIG. 11B, in the state in which the bending deformation of the seal rubber 10 is completed, the vertical movement amount J2 of the upper surface 31a from the natural state of the seal rubber 10 shown by the two-dot chain line It becomes the deflection amount in the mounting mode. The amount of deflection of the seal rubber 10 is approximately half the size in comparison with the mounting mode of the seal rubber 10 as shown in FIG.

  Thus, according to the seal rubber 10 which concerns on this embodiment, it becomes possible to adjust the bending amount of the seal rubber 10 by the attachment aspect with respect to the partition edge part 11c. In the mounting mode of the seal rubber 10 as shown in FIG. 11A, for example, the thermal deformation of the skin type 2 is relatively small and follows the change in the gap between the skin type 2 and the reservoir tank 3 due to the deformation of the skin type 2 Used in cases where the range of operation is relatively narrow. According to this mounting mode, it is possible to keep the sealing performance following the deformation of the skin type 2 while obtaining the stable bending deformation of only the first layer in the seal rubber 10.

  Next, a modification of the seal rubber 10 according to the present embodiment will be described with reference to FIGS. 12, 13 and 14. The seal rubber 10 of this modification is provided with a configuration for the purpose of further improving the yield.

  As shown in FIG. 12, in the seal rubber 10 of this modification, at least a portion of the leg 27 for bending or curving the seal rubber 10 in the longitudinal direction in a portion of the seal rubber 10 in the longitudinal direction (extension direction). Has a notch 50 cut out.

  In the example shown in FIG. 12, the cut-out portion 50 is a leg portion in the vertical direction, with the lower side being an open side, along the substantially isosceles triangular shape in which the lower side of the seal rubber 10 is the bottom side in each leg 27 It is formed in the range including 27 whole. In detail, the cutaway portion 50 has the oblique side portions 51 on both sides in the longitudinal direction of the seal rubber 10 and the upper side portion 52 which is a side portion between the oblique side portions 51 and extends in the longitudinal direction of the seal rubber 10. Further, in the left and right legs 27, the notches 50 are formed to have the same dimensions so as to be aligned in the side view of the seal rubber 10, that is, at the common position.

  The reservoir tank 3 has a three-dimensional uneven shape at the partition edge 11 c so as to follow the three-dimensional uneven shape of the skin type 2. Then, the shape R (curvature radius) is smaller at the partition edge 11c so as to conform the shape of the partition edge 11c to the shape of the molding surface 2b of the skin type 2, that is, the product shape (small R Part) will occur. That is, the curvature of the R portion in the partition edge 11c is made to follow the molding surface 2b as the partition edge 11c is made closer to the fine uneven shape of the molding surface 2b corresponding to the shape of the skin material 15. The radius needs to be reduced.

  Therefore, the notch 50 is used to bend the seal rubber 10 in correspondence with the small R portion of the partition edge 11c. That is, in the sealing method of this modification, the partition 50 in the longitudinal direction of the seal rubber 10 is formed by forming the notch 50 in a part of the seal rubber 10 in the longitudinal direction when attaching the seal rubber 10 to the partition edge 11c. The seal rubber 10 is bent in the longitudinal direction so as to follow the small R portion of the edge portion 11 c. Therefore, the notches 50 are formed at one or more locations in the longitudinal direction of the seal rubber 10 so as to correspond to the small R-shaped portions of the partition edge 11c.

  Specifically, for example, FIG. 13A shows an attachment aspect of the seal rubber 10 in the case where the R-shaped portion 61 having a substantially right-angled shape is present as the concavo-convex shape in the vertical direction at the partition edge 11c. In this case, in the longitudinal direction of the seal rubber 10, the notch 50 faces the R-shaped portion 61, and the portions 10a and 10a on both sides of the notch 50 are along the side portions 61a and 61a forming the R-shaped portion 61. The seal rubber 10 is attached to the partition edge 11c in a bent state.

  In the mounting mode of the seal rubber 10 shown in FIG. 13 (a), the notch 50 is located on the inner side (inner peripheral side) of the bent shape in the seal rubber 10, and allows the upper side of the seal rubber 10 to be a convex side. There is. That is, the notch 50 eliminates the looseness of the rubber surface in the bending inner side when the seal rubber 10 is bent in a right-angled shape, and the seal rubber 10 is against the corner portion of the partition edge 11c including the R-shaped portion 61, It is attached in the state holding the cross-sectional shape in a fixed shape.

  In the attached state of the seal rubber 10 shown in FIG. 13A, the notch 50 brings the oblique side portions 51 on both sides close to each other by the bending of the seal rubber 10, and is in a state of being compressed and deformed. As shown in FIG. 13A, when a gap 62 is created between the R-shaped portion 61 and the seal rubber 10 due to the notch 50, filling the gap 62 with a filler such as silicone rubber will fill the hole. The sealing performance by the seal rubber 10 is secured.

  Further, FIG. 13B shows an attachment aspect of the seal rubber 10 in the case where a substantially right-angled concave R-shaped portion 63 is present as the uneven shape in the vertical direction at the partition edge portion 11c. In this case, in the longitudinal direction of the seal rubber 10, the notch 50 faces the R-shaped portion 63, and the portions 10a and 10a on both sides of the notch 50 are along the side portions 63a and 63a forming the R-shaped portion 63. The seal rubber 10 is attached to the partition edge 11c in a bent state.

  In the mounting mode of the seal rubber 10 shown in FIG. 13 (b), the notch 50 is located on the outer side (peripheral side) of the bent shape in the seal rubber 10, and allows bending with the upper side of the seal rubber 10 being concave. . That is, the notch 50 cancels the tension of the rubber surface in the bending outer side when the seal rubber 10 is bent in a right-angled shape, and the seal rubber 10 is against the concave corner portion of the partition edge 11c including the R-shaped portion 63. , Is mounted in a state in which the cross-sectional shape is held in a constant shape.

  In the attached state of the seal rubber 10 shown in FIG. 13B, the notch 50 separates the oblique side portions 51 on the both sides by the bending of the seal rubber 10 and is in an elongated deformation state. As shown in FIG. 13B, when a gap 64 is created between the R-shaped portion 63 and the seal rubber 10 due to the notch 50, the hole filling with a filler such as silicone rubber is performed as described above. .

  Further, FIG. 13C shows the attachment mode of the seal rubber 10 in the case where the R-shaped portion 65 having a substantially right-angled shape is present as the concavo-convex shape (in plan view) in the horizontal direction at the partition edge portion 11c. . In this case, the notch 50 is located at the R-shaped portion 65 in the longitudinal direction of the seal rubber 10, and the portions 10a and 10a on both sides of the notch 50 are along the side portions 65a and 65a forming the R-shaped portion 65. Thus, the seal rubber 10 is attached to the partition edge 11c in a bent state.

  In the mounting mode of the seal rubber 10 shown in FIG. 13C, the notch 50 is located on the inner side (inner peripheral side) and the outer side (outer peripheral side) of the bent shape in the seal rubber 10 Allow for flexion of That is, the notch 50 cancels the slack of the rubber surface in the bending inner side and the tension of the rubber surface in the bending outer side when the seal rubber 10 is bent at right angles in plan view, and the partition edge including the R-shaped portion 65 The seal rubber 10 is attached to the corner portion of the portion 11c in a state in which the cross-sectional shape is maintained in a fixed shape.

  In the attached state of the seal rubber 10 shown in FIG. 13C, in the notch 50, the notch 50A on the inner side brings the oblique sides 51 on the both sides close to each other by the bending of the seal rubber 10, and is compressed and deformed. The outer notches 50B are in a state in which the oblique sides 51 on the both sides are separated from each other by the bending of the seal rubber 10, and are elongated and deformed. Also in the case shown in FIG. 13C, the gap formed between the R-shaped portion 65 and the seal rubber 10 due to the notch 50 is filled with a filler such as silicone rubber.

  As described above, by providing the cutaway portion 50 in the seal rubber 10, it becomes possible to correspond to the small R portion of the partition edge portion 11c as the attachment portion of the seal rubber 10. This can improve the yield in slush molding.

  That is, in order to properly attach the seal rubber 10 without causing the rubber surface portion to be sluggish or tensioned to a portion which becomes a small R portion when the uneven shape of the partition edge portion 11c approaches the product shape The shape itself of the partition wall edge portion 11c is a shape in which the radius of curvature R is increased to include the small R portion. In other words, by detouring the disposition path of the partition edge portion 11c, that is, the seal line by the seal rubber 10, the area inside the seal line (the molding surface 2b side) includes the area including the small R portion. The radius R is enlarged to be large.

  As described above, when the seal line by the seal portion 7 is diverted, the seal position (the position of the partition edge 11c) by the seal portion 7 is separated outward from the end position (outer position) of the product shape. And since the seal position by the seal part 7 is separated from the end position of the product shape, the area (powder melting area) where the powder material 4 adheres and melts spreads at the outer peripheral edge. On the other hand, in the molded product obtained by slush molding, the portion outside the predetermined cutting line along the outer shape of the product shape is the portion cut off in the later trimming step. For this reason, as described above, the fact that the powder melting region spreads at the outer peripheral edge portion enlarges the area of the part to be cut off in the trimming step in the molded product, and as a result, the yield is reduced.

  Therefore, by providing the notches 50 in the seal rubber 10 as described above, it is possible to reduce the size of the radius of curvature R that can be supported for the shape of the partition edge 11c to which the seal rubber 10 is attached. As a result, the seal line (arrangement path) of the seal rubber 10 can be made to follow the product shape and be as close as possible to the end position of the product shape. Therefore, the area of the excess portion cut off by the trimming process can be reduced in the molded product, and as a result, the yield can be improved. Thereby, the cost of an article can be reduced.

  As a specific numerical value, the curvature radius which can correspond to the case where the cut portion 50 is not provided in the seal rubber 10 is the uneven shape of the partition edge 11c in the vertical direction as shown in FIGS. 13 (a) and 13 (b) The radius of curvature R in the following "surface unevenness" is R> 50 (mm), and the plan view shape of the partition edge 11c as shown in FIG. 13 (c) (hereinafter "line inflection" For the radius of curvature R in), R> 80 (mm). On the other hand, by providing the cut-out portion 50 in the seal rubber 10, the radius of curvature R that can be handled is R> 10 (mm) for surface irregularities and R> 4 (mm) for line inflection.

  Thus, the shape and size (the formation range of the notch 50) of the notch 50 for arranging the seal rubber 10 corresponding to the small R portion are not particularly limited, and in the partition edge portion 11c It can be suitably changed according to the shape etc. of the part which makes a small R part. Specifically, for example, as shown in FIG. 14 (a), the notch 50 may be a notch 50X formed along a rectangular shape, and also shown in FIG. 14 (b). As such, it may be a notch 50Y or the like formed along a semicircular shape (semicircular arc shape).

  The rectangular notch 50X shown in FIG. 14 (a) has the lower side as the open side, and is a side portion between the longitudinal side portions 53 on both sides in the longitudinal direction of the seal rubber 10, and between the longitudinal side portions 53. And a lateral side 54 extending in the longitudinal direction. The semicircular notch 50Y shown in FIG. 14 (b) has an open side at the lower side, and has a semicircular arc side 55. These notches 50 </ b> X and 50 </ b> Y are both formed in the left and right legs 27 so as to be aligned in a side view of the seal rubber 10.

  In addition, although the notch part 50 which concerns on this embodiment is formed in both of the leg part 27 of both right and left, depending on the shape part of the partition edge part 11c corresponding by the notch part 50, the leg part 27 of right and left The notch 50 may be formed in only one of the two. That is, at least any one of the left and right legs 27 may be formed in one leg 27 of the notch 50. Moreover, although the notch part 50 which concerns on this embodiment is formed in the range which reaches a part of partition part 33 from the lower end of seal rubber 10 in the up-down direction, it may be formed only in the part of leg part 27, It may be formed in the range which reaches the side part 32 of the contact side cylindrical part 21. As shown in FIG. That is, the notch 50 may be formed in a mode in which at least a part of the leg 27 is cut.

  Further, in the seal rubber 10 according to the present embodiment, since the top surface portion 31 is formed as a relatively thick portion, in the configuration in which the notch portion 50 is provided, for example, as in the seal rubber 110 shown in FIG. The rigidity of the formation portion of the notch 50 can be easily secured as compared with the configuration having the curved upper end portion shape. That is, since the rigidity of the seal rubber 10 is easily secured by forming the top surface portion 31 as a relatively thick portion, a high degree of freedom can be obtained for the shape and size of the notch portion 50, The processing of the seal rubber 10 for forming the cutaway portion 50 becomes easy.

  The technique relating to the seal of the slush molding according to the present invention described in the embodiment as described above is not limited to the above-described embodiment, and various modes can be adopted within the scope of the present invention.

  Hereinafter, embodiments of the present invention will be described. In the present example, the following dimensions were adopted for the dimensions of each part of the seal rubber 10 according to the embodiment described above. That is, the dimension of the deflection region (see FIG. 5, region G1) is 20 mm, the thickness dimension of the central portion in the width direction of partition 33 (see FIG. 7, dimension D4) is 1.48 mm, and the vertical direction of side surface 32 is The thickness dimension of the central portion (see FIG. 7, dimension D3) is 1.8 mm, and the thickness dimension of the top surface 31 (see FIG. 7, dimension D1) is 4 mm. Moreover, the overlap dimension (refer FIG. 7, dimension K1) of the seal rubber 10 and the partition edge part 11c was 6 mm. In the present embodiment, the overlap dimension corresponds to the dimension from the lower end face 24a of the holding piece 24 to the lower end of the inner wall surface 26a of the side wall 26 in the vertical direction. The rubber hardness of the seal rubber 10 is 40 degrees, and the length of the seal rubber 10 is 50 mm.

  A load was applied to the seal rubber 10 according to the present embodiment having such dimensions so as to be compressed in the vertical direction. In this embodiment, as in the case of the modified embodiment of the seal rubber 10 described with reference to FIG. 9, the molding surface 2 a of the skin type 2 with which the upper surface 31 a of the seal rubber 10 contacts is a horizontal surface, and the direction of the load acting on the seal rubber 10 The seal rubber 10 was compressed and deformed in the vertical direction with the

  FIG. 15 is a graph showing the relationship between the amount of deflection of the seal rubber and the load according to the present example. In the graph shown in FIG. 15, the horizontal axis indicates the displacement (mm) corresponding to the amount of deflection of the seal rubber 10, and the vertical axis indicates the load acting on the seal rubber 10, that is, the load as a reaction force by the elasticity of the seal rubber 10 (N ).

  As can be seen from the graph shown in FIG. 15, the load rises relatively gently until the load reaches 0 N to about 30 N while the amount of deflection of the seal rubber 10 reaches 0 mm to about 10 mm. Then, before the amount of deflection of the seal rubber 10 reaches 10 mm, the degree of increase in load accompanying the increase in the amount of deflection is relatively steep, and the load is 72 N at a point of 12 mm of deflection.

  The magnitude of the load needs to be set so that the clamping force does not become excessive from the relationship with the clamping force of the skin type 2 and the clamping mechanism 6 of the reservoir tank 3. From this point of view, the load per 50 mm length of the seal rubber 10 according to the present embodiment is preferably 50 N or less. Therefore, according to the seal rubber 10 which concerns on a present Example, deflection amount of at least 11 mm can be obtained. In the present embodiment, the load when the amount of deflection is 11 mm is 45.8 N.

  According to the present embodiment, according to the seal rubber 10, it is possible to suppress a sharp rise in load in a wide range (a range of 0 to about 10 mm) as to the deflection amount, and while sufficiently suppressing the load of the seal rubber 10 as a whole. It has been demonstrated that quantities can be obtained. As a structural factor of the load suppressing action of the seal rubber 10, the side surface portion 32 of the contact side cylindrical portion 21 and the side wall portion 26 of the intermediate space forming portion 23 may have thin portions 32b and 26d, respectively.

  Moreover, according to the seal rubber 10 according to the present embodiment, when the inclination angle from the horizontal surface is up to about 15 °, it is possible to suppress the deviation to the left and right with respect to the deformation mode of the seal rubber 10 and obtain stable bending deformation. It is obtained as an experimental result.

  Moreover, according to the seal rubber 10 according to the present embodiment, the sealing property for preventing the leakage of the powder material 4 can be obtained in the state of being bent by 1 mm in the vertical direction due to its characteristics. Therefore, assuming that the total amount of deflection of the seal rubber 10 is 11 mm, at least 1 mm of them is used as a deformation for obtaining the sealability, and the remaining 10 mm is a gap 120 associated with the deformation of the skin type 2 (FIG. 8). It is used as a range (deformation allowance) of the amount of deflection to follow the change of (reference). That is, in this case, in order to absorb the change of the gap 120 between the skin type 2 and the reservoir tank 3, a maximum deflection amount of 10 mm can be obtained.

1 slush molding apparatus 2 skin type 2a molding surface 2b molding surface portion 3 reservoir tank 4 powder material 7 seal portion 8 moving space 10 seal rubber (seal member)
11c Partition wall edge 15 Skin material (skin-like member)
20a upper stage cavity 20b lower stage cavity 21 contact side cylindrical section 21b outer wall surface 21d corner 22 pinching section 23 intermediate space forming section 23s space 26 side wall section 26a inner wall surface 26d thin section 26e upper slope section 26f lower slope section 27 legs 31 sky Surface portion 31a Upper surface 32 Side surface portion 32b Thin-walled portion 32c Wall surface 32d Wall surface 33 Partition portion 50 Notched portion

Claims (11)

A slush molding apparatus for molding a skin-like member, comprising:
A mold having a molding surface,
A reservoir tank for containing powder material and receiving the attachment of the mold to form a transfer space of the powder material with the mold;
And a seal member attached to an edge of the reservoir tank facing the partition part of the movement space in the mold and sealing between the mold and the reservoir tank.
The seal member is
A contact-side cylindrical portion which forms a contact portion with the mold and which forms a cavity along the longitudinal direction of the seal member;
And an intermediate space forming portion provided on the attachment side of the contact side cylindrical portion with respect to the edge of the reservoir tank and forming a space along the longitudinal direction of the seal member with the contact side cylindrical portion. A slush molding device characterized by The contact side tubular portion is
A top surface portion that forms a contact surface with the mold;
A pair of side portions opposed in the width direction of the seal member;
And a partition portion which is a surface portion facing the top surface portion and which divides a cavity of the contact side cylindrical portion and a space formed by the intermediate space forming portion,
The slush molding apparatus according to claim 1, wherein the contact surface is formed in a planar shape, and is formed so as to form an angle with a wall surface outside the contact side cylindrical portion. The slush molding apparatus according to claim 2, wherein the top surface portion is formed thicker than the side surface portion. The slush molding apparatus according to claim 2 or 3, wherein the side surface portion has a thin-walled portion which is thinner than other portions in a part of the sealing member in the vertical direction. The side wall portion has a flat outer wall surface along the vertical direction of the seal member, and the inner wall surface is a curved surface whose outer side in the vertical direction has a convex side in the width direction. 4. The slush molding apparatus according to claim 2, wherein the slush molding device has a shape in which the thickness is gradually reduced from the both ends to the center in the vertical direction. The dimension of the width direction of the seal member of the intermediate space forming portion is larger than the dimension of the width direction of the contact-side tubular portion. Slush forming device. The intermediate space forming portion includes a pair of side wall portions facing each other in the width direction of the seal member,
The slush molding according to any one of claims 1 to 6, wherein the side wall portion has a thin-walled portion which is thinner than another portion in a part in the vertical direction of the seal member. apparatus. The intermediate space forming portion includes a pair of side wall portions facing each other in the width direction of the seal member,
In the vertical direction, the side wall portion includes a curved surface in which the inner wall surface includes an inclined surface substantially symmetrical in the vertical direction and the outer side in the width direction is a convex side in the vertical direction. The slush molding apparatus according to any one of claims 1 to 6, wherein the central portion is a portion with the smallest thickness. The sealing member has a holding portion for holding an edge portion of the reservoir tank,
The intermediate space forming portion includes a pair of side wall portions facing each other in the width direction of the seal member,
The side wall portion is a portion that is continuous with the holding piece portion that makes the holding portion, and forms a leg portion that extends downward with respect to the contact side cylindrical portion together with the holding piece portion,
The notch part which cut out at least a part of the said leg part in order to make the said sealing member bend or curve about the said longitudinal direction is provided in a part of the said longitudinal direction. The slush molding apparatus according to item 1. A sealing method for slush molding, which seals between a mold having a molding surface and a reservoir tank which accommodates a powder material and receives the mounting of the mold to form a transfer space of the powder material with the mold. ,
As a member for sealing between the mold and the reservoir tank,
A contact-side cylindrical portion which forms a contact portion with the mold and which forms a cavity along the longitudinal direction of the seal member;
A sealing member having a pair of legs extending in the mounting direction with respect to the edge of the reservoir tank with respect to the contact side cylindrical portion and facing in the width direction of the sealing member;
The sealing member is attached to the reservoir tank in a state in which the edge portion of the reservoir tank facing the partition portion of the moving space in the mold is held between the attachment side portions of the pair of leg portions. A cavity is formed along the longitudinal direction of the seal member by the leg side portion of the contact side cylindrical portion, the contact side cylindrical portion side portion of the pair of legs, and the edge portion. A sealing method for slush molding characterized by At the time of attachment of the seal member to the edge portion, by forming a cutout in which at least a portion of the leg portion is cut out in a part of the longitudinal direction, the edge portion in the longitudinal direction is The seal method for slush molding according to claim 10 , wherein the seal member is bent or curved in the longitudinal direction so as to follow a small R portion.

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