JP6135556B2 - Method of fixing the skin in the mold - Google Patents

Description

  The present invention relates to a method for fixing a skin in a mold.

  When forming a foam molded article having a foam molded article and a skin integrally joined to one side surface of the foam molded article in a pair of molds, one of the pair of molds is previously formed. It is necessary to fix the epidermis. In such a method of fixing the skin in the mold, for example, in order to fix the skin to one mold, for example, a permanent magnet is provided in one mold, while a magnetic material such as an iron plate is provided on a part of the skin. It is conceivable that the skin is fixed to one mold by arranging a plate and attracting the magnetic plate of the skin by the magnetic force of a permanent magnet.

  Further, in blow molding, for example, as disclosed in Patent Document 1, it is known that the slit plate disposed on the carpet is attracted and temporarily fixed by the magnetic force of the magnet disposed on the mold. .

JP-A-7-88261

  By the way, in a pair of molds for molding a foam molded product integrally having a foam molded body and a skin, one of the molds is formed by adsorbing the magnetic plate of the skin by the magnetic force of a permanent magnet disposed in one mold. When the skin is fixed to the mold, the surface of the skin is displaced against the magnetic adsorption force by the foaming pressure when the foamed material is foamed by filling the cavity between the pair of molds. It is assumed that it will be removed. Also, if the magnetic force of the permanent magnet is made strong, it is possible to suppress the displacement and lifting of the skin, but the demolding operation of the foam molded product becomes troublesome.

  In view of the above problems, an object of the present invention is to provide a method for fixing a skin in a molding die that can firmly fix the skin to the molding die and suppress the displacement and lifting of the skin.

  In order to solve the above-mentioned problem, a method for fixing a skin in a mold according to the first aspect of the present invention includes a foam having a foam molded body and a skin integrally joined to one side surface of the foam molded body. A method of fixing a skin in a molding die in which the skin is fixed to one molding die of the pair of molding dies before molding the molded product in the pair of molding dies. A clamping mold is fixed to the mold, and the outer skin is sandwiched and fixed by the cooperation of the one mold and the clamping mold.

  According to the first invention, the skin can be sandwiched and fixed by the cooperation of the one mold and the clamping mold. For this reason, a foaming material is filled in the cavity between the pair of molds and the foaming pressure when the foamed molded body is foam-molded can be received by the sandwiching mold, and the positional displacement and lifting of the skin are satisfactorily suppressed. be able to. As a result, it is possible to form a foam molded article by satisfactorily joining the skin to the surface of the foam molded article.

  The method for fixing the skin in the mold according to the second invention of the present invention is a method for fixing the skin in the mold according to the first invention, wherein the skin is fixed between the one mold and the clamping mold. A plurality of fixed protrusions for positioning and fixing the sandwiching mold and a plurality of fitting holes into which the plurality of fixed protrusions are removably inserted are respectively provided.

  According to the second aspect of the present invention, the clamping mold is attached to the molding mold by fitting the plurality of fixed protrusions and the plurality of fitting holes respectively disposed between the molding mold and the clamping mold. It can be positioned and fixed accurately. As a result, the effect of suppressing the displacement and lifting of the epidermis can be enhanced.

  The method for fixing the skin in the mold according to the third aspect of the present invention is the method for fixing the skin in the mold according to the second aspect of the invention, wherein the plurality of fixing protrusions are inserted through the skin, respectively. A plurality of cut portions are formed.

  According to the third invention, the plurality of fixed protrusions and the plurality of fitting holes are fitted to each other, the clamping mold is positioned and fixed with respect to one molding die, and the one molding die and the clamping mold are When the skin is sandwiched and fixed by cooperation, a plurality of cut portions of the skin are respectively inserted into the plurality of fixing protrusions. In this state, the skin can be accurately positioned with respect to one mold by the positioning action of the plurality of cut portions and the plurality of fixed protrusions. In addition, a foam material is filled in the cavity between the pair of molds, the foam molded body is foam-molded, and the surface of the foam molded body is joined to form a foam molded product, and then the foam molded product is removed. When molding, the foamed product can be easily removed by pulling out the skin from the plurality of fixed projections at the plurality of cut portions.

It is a plane sectional view which shows the product (seat back) using the foaming molded product manufactured by the skin fixing method in the shaping | molding die of this invention. It is a perspective view which isolate | separates and shows a pair of shaping | molding die, a clamping die, and an outer skin. It is sectional drawing which shows the state by which the skin was clamped with the clamping mold with respect to one shaping | molding die. It is sectional drawing which shows the state by which the other mold was closed after the skin was clamped with the clamping mold with respect to one mold. It is sectional drawing which shows the state by which the foaming material was filled with the foaming material in the cavity between a pair of shaping | molding dies, and the foaming molding was formed by foaming. It is sectional drawing which shows the foamed molded product which was demolded. It is sectional drawing which shows the state by which the terminal part of the skin of a foam-molded product is pushed in in a shaping | molding groove with the terminal part of another skin, and the seat back as a product is comprised.

  A mode for carrying out the present invention will be described in accordance with an embodiment.

  A first embodiment of the present invention will be described with reference to the drawings. In Example 1, an example in which a product using a foam molded product manufactured by a method for fixing a skin is a seat back is illustrated.

  As shown in FIG. 1, the seat back 1 includes a foam molded article 10 integrally having a foam molded body 20 and a first skin 31, a second skin 35, and a locking member 40. The foam molding 20 is formed by filling a foam material between a first molding die 50 and a second molding die 60 that form a pair, which will be described later, and foaming, and has a substantially rectangular plate shape. In addition, a molding groove 21 having a quadrangular annular shape is formed at the same time as the molding on the peripheral portion of one side surface (the lower surface in FIG. 1) of the foam molded body 20.

  The first skin 31 is made of carpet, and is bonded to one side surface (the lower surface in FIG. 1) of the foam molded product 10 simultaneously with the foam molding of the foam molded body 20. The foam molded article 10 and the first skin 31 constitute a foam molded article 10.

  The second skin 35 covers a surface opposite to one side surface of the foamed molded body 20, and a resin locking member 40 is attached to the four end portions 36 by sewing machines 37. That is, the locking member 40 includes a square frame-shaped head portion 41 that extends along the peripheral edge of one side surface of the foam molded body 20 and a leg portion 45 that protrudes from one end portion of the lower surface of the head portion 41 toward the molding groove 21. Are integrated. A presser portion 42 projects from the inner peripheral edge of the head portion 41, and a hook-shaped hook portion 46 is formed at the distal end portion of the leg portion 45. Furthermore, the four end portions 36 of the second skin 35 are attached to the inner surface of the leg portion 45 by a sewing machine 37 with the head portion 41 and the presser portion 42 of the locking member 40 being covered.

  Then, the terminal portion 36 of the second skin 35 is pushed into the forming groove 21 together with the leg portion 45 of the locking member 40 and is mounted. At this time, the terminal portion 32 of the first skin 31 is also pushed into the molding groove 21 together with the terminal portion 36 of the second skin 35 so as to be mounted, thereby forming the seat back 1 as a product. The

  Next, a method for fixing the skin in the mold will be described with reference to FIGS. As shown in FIG. 2 and FIG. 3, of the pair of first molding die 50 and second molding die 60, four sides of the first molding die 50 are provided on the side surface (molding side surface). A mold matching surface 52 is formed at the periphery, and a molding recess 51 is formed inside the mold matching surface 52. On the four peripheral edges of one side surface (molding side surface) of the second mold 60, a mold matching surface 62 corresponding to the mold matching surface 52 of the first mold 50 is formed. Is formed with a molding recess 61 that forms a cavity in cooperation with the molding recess 51 of the first mold 50.

  Before forming the foam molded article 10 having the foam molded body 20 and the first skin 31 in the cavity between the first mold 50 and the second mold 60 that form a pair, In order to fix the first skin 31 to the first molding die 50, the first molding die 50 has a terminal portion 32 around the four sides of the first skin 31 in cooperation with the first molding die 50. A sandwiching mold 70 is fixed so as to be detachable. The clamping mold 70 is formed in a square frame shape along the peripheral edge portion of the first skin 31, and groove forming for forming a square annular forming groove 21 along the peripheral edge portion of one side surface of the foam molded body 20. The main body 71 is formed mainly. A pinching surface 72 is formed on the bottom surface of the groove forming frame 71 so as to sandwich the four end portions 32 of the skin 31 in cooperation with the bottom surface of the molding recess 51 of the first molding die 50.

  Between the first mold 50 and the sandwiching mold 70, a plurality of fixed protrusions 73 for positioning and fixing the sandwiching mold 70 with respect to the first mold 50, and the plurality of fixed protrusions 73 are inserted. A plurality of fitting holes 55 to be removably inserted are provided. In the first embodiment, a plurality of fitting holes 55 for positioning and fixing the sandwiching mold 70 are formed at predetermined hole depths on each side of the four peripheral portions of the bottom surface of the molding recess 51 of the first molding die 50. Has been. In addition, a plurality of pin-shaped (shaft-shaped) fixed protrusions 73 that are removably inserted into the plurality of fitting holes 55 protrude from the holding surface 72 of the groove-forming frame 71 of the holding mold 70. It is installed.

  In addition, a plurality of notch-like cut portions 33 into which a plurality of fixed protrusions 73 are inserted are respectively formed in the terminal portions 32 (including the corner portions) of the four circumferences of the first skin 31. .

  The skin fixing method in the mold according to the first embodiment is configured as described above. Therefore, when manufacturing the foam molded product 10, first, as shown in FIG. 3, the plurality of cut portions 33 of the first skin 31 are inserted into the plurality of fixed protrusions 73 of the clamping mold 70. Thereafter, as shown in FIG. 4, the plurality of fixed protrusions 73 of the clamping mold 70 are inserted into the plurality of fitting holes 55 of the molding recess 51 of the first molding die 50. Accordingly, the first skin 31 is sandwiched and fixed by the cooperation of the bottom surface of the molding recess 51 of the first molding die 50 and the clamping surface 72 of the clamping die 70.

  Thereafter, as shown in FIG. 4, the second molding die 50 is in a second state with respect to the first molding die 50 in a state where the die matching surface 52 of the first molding die 50 and the die matching surface 62 of the second molding die 60 are aligned. The mold 60 is closed. Here, as shown in FIG. 5, a foam material (for example, a foamable resin material) is filled in a cavity formed by the molding recess 51 of the first molding die 50 and the molding recess 61 of the second molding die 60. And the foaming molding 20 is foam-molded by foaming a foaming material within a cavity. And the 1st skin 31 is joined to the surface of the foaming molding 20, and the foaming molding 10 is shape | molded by this.

  As described above, after molding the foam molded article 10 integrally including the foam molded body 20 and the first skin 31, the second mold 60 is opened with respect to the first mold 50, and foam molding is performed. The body 20 is removed (see FIG. 6). The surface opposite to the one side covered with the first skin 31 of the foam molded body 20 is covered with the second skin 35. As shown in FIG. 7, the terminal portion 36 of the second skin 35 is attached by being pushed into the forming groove 21 together with the leg portions 45 of the locking member 40 in a grained manner. At this time, the terminal portion 32 of the first skin 31 is also pushed into the molding groove 21 together with the terminal portion 36 of the second skin 35 in a grained manner, and as a result, as shown in FIG. A seat back 1 is configured.

  As described above, according to the method of fixing the skin in the mold according to the first embodiment, the first skin is obtained by the cooperation of the bottom surface of the molding recess 51 of the first mold 50 and the clamping surface 72 of the clamping mold 70. 31 can be inserted and fixed. Further, the sandwiching mold 70 receives the foaming pressure when the foaming material 20 is foam-molded by filling the foamed material into the cavity between the pair of the first mold 50 and the second mold 60. It is possible to satisfactorily suppress the displacement and lifting of the first skin 31. As a result, the foamed article 10 can be molded by favorably joining the first skin 31 to the surface of the foamed molded body 20.

  In the first embodiment, the first molding is performed by fitting the plurality of fixing protrusions 73 and the plurality of fitting holes 55 respectively disposed between the first molding die 50 and the sandwiching die 70. The clamping mold 70 can be accurately positioned and fixed to the mold 50. As a result, it is possible to enhance the effect of suppressing the displacement and lifting of the first skin 31.

  Further, in the first embodiment, the plurality of fixing protrusions 73 and the plurality of fitting holes 55 are fitted to each other so that the clamping die 70 can be accurately positioned and fixed with respect to the first mold 50. it can. Further, when the first skin 31 is sandwiched and fixed by the cooperation of the first mold 50 and the sandwiching mold 70, the plurality of cut portions 33 of the first skin 31 are respectively formed on the plurality of fixing protrusions 73. It is inserted. In this state, the first skin 31 can be accurately positioned with respect to the first mold 50 by the positioning action of the plurality of notches 33 and the plurality of fixed protrusions 73. Further, a foam material is filled in the cavity between the first mold 50 and the second mold 60 to foam-mold the foam-molded body 20, and the first skin 31 is formed on the surface of the foam-molded body 20. After forming the foamed molded article 10 by joining, when the foamed molded article 10 is removed from the mold, the first skin 31 is pulled out from the plurality of fixed projections 73 at the plurality of cutouts 33 to be the foamed molded article. 10 can be easily removed.

  Further, in the first embodiment, the molding groove 21 can be formed in the foam molded body 20 by the groove-forming frame 71 of the clamping mold 70.

  In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can implement with a various form. For example, in Example 1, although the case where the product using the foaming molded product manufactured by the fixing method of a skin is a seat back, this invention can be implemented even if it is other than a seat back.

DESCRIPTION OF SYMBOLS 10 Foam molded product 20 Foam molded object 21 Molding groove 31 1st skin (skin)
32 Terminal part 33 Cut part 50 1st shaping | molding die 55 Fitting hole 60 2nd shaping | molding die 70 Nipping mold | type 71 Groove forming frame 72 Nipping surface 73 Fixed protrusion

Claims (2)

Before forming a foam molded article having a foam molded article and a skin integrally bonded to one side surface of the foam molded article in a pair of molds, one of the pair of molds is preliminarily formed. A method of fixing the skin in a molding die for fixing the skin to a molding concave portion on the inner side of a mold mating surface with the other molding die in the molding die ,
In fixing the sandwiching mold in the molding recess of the one mold, and sandwiching and fixing the terminal portion of the skin by the cooperation of the one mold and the sandwiching mold ,
Between the one mold and the clamping mold, a plurality of fixed projections for positioning and fixing the clamping mold, and a plurality of fitting holes into which the plurality of fixed projections are removably inserted. And a method of fixing the skin in the mold, wherein each is disposed . A method of fixing the skin in the mold according to claim 1,
  A method of fixing a skin in a mold, wherein the skin is formed with a plurality of cut portions through which the plurality of fixing protrusions are respectively inserted.

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