JP5263608B2 - Molding equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide molding equipment which can optionally carry out positional adjustment of a transfer surface. <P>SOLUTION: When a lid member 14 is contacted with the back 10e of an insert 10 exposed from an opening 6a, since a second slope 14a is contacted with the second contact face 10f of the insert 10, when the second slope 14a presses the second contact face 10f of the insert 10 by the screw force of bolts 15 and 15, the inlet side of the insert 10 is biased upward in the Z direction. Since a first slope 6n presses a first contact face 10d by the same screw force, the back side of the insert 10 is also biased upward in the Z direction. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a molding apparatus suitable for high-precision molding of, for example, an optical element.

  For example, an optical element is often formed by injection molding of a resin, which has an advantage that an optical element having a highly accurate shape can be mass-produced. A so-called saddle molding apparatus is known as a molding apparatus suitable for molding such an optical element. The vertical molding apparatus has a movable-side die set fitted with a movable-side insert having a transfer surface similarly to a fixed-side die set fitted with a fixed-side insert having a transfer surface, and butt-transferred. Molding is performed by filling a resin in a cavity formed by a surface.

  Here, one problem with the vertical molding apparatus is that the nest attached to the die set located above the gravitational direction is urged downward according to gravity, so that it is necessary to support the nest so that it does not fall. That is. In addition, in order to perform highly accurate molding, it is necessary to position the pair of transfer surfaces with high accuracy. However, it is generally difficult to adjust the position in the direction of gravity while supporting the weight of the nest, and there is a problem that adjustment work is difficult. On the other hand, in Patent Document 1, in a vertical molding apparatus, the tip of a bolt inserted obliquely is brought into contact with a concave portion on a side surface of a cassette unit (nesting) mounted on a die set, thereby dropping the cassette unit. And a technique capable of adjusting the position of the cassette unit with the screwing amount of the bolt is disclosed.

Japanese Patent Laid-Open No. 06-270203

  However, according to the technique of Patent Document 1, although the horizontal position adjustment of the cassette unit with respect to the die set is possible, there is a problem that the position adjustment in the gravity direction cannot be performed. In addition, since the cassette unit is supported only by the bolts, there is a gap between the die set and the cassette unit. For this reason, if an excessive molding pressure is applied, the cassette unit becomes minute relative to the die set. There is also the problem of shifting.

  The present invention has been made in view of the problems of the related art, and an object thereof is to provide a molding apparatus capable of arbitrarily adjusting the position of a transfer surface.

The molding apparatus according to claim 1 is a molding apparatus that includes a template having a first surface and a second surface that extend in directions intersecting each other, and a nesting having a transfer surface.
The insert is inserted into the template from the opening of the first surface, and the transfer surface is exposed through the opening of the second surface,
The inside of the opening of the second surface is widened to form an inner step,
In a state where the insert is inserted into the template, the insert does not pass through the opening of the second surface by being hooked on the inner stepped portion,
An adjusting means for adjusting the position of the nesting in the first direction with the transfer surface facing the template is provided ,
The adjusting means is a plate-like spacer,
The first direction is a gravity direction .

  According to the present invention, since the size of the opening of the second surface is smaller than the size of the nesting, for example, the nesting is prevented from dropping through the opening of the second surface, Since the adjusting means for adjusting the position of the nesting in the first direction with the transfer surface facing the template is provided, at least the adjustment in the first direction can be arbitrarily performed. Note that “the size of the opening on the second surface is smaller than the size of the nest” means that when the nest inserted in the template is in a predetermined posture, the nest cannot pass through the opening on the second surface. This refers to a dimensional relationship, and includes a case where the size of a part of the opening on the second surface is larger than the size of a part of the nest.

  According to a second aspect of the present invention, there is provided the molding apparatus according to the first aspect, wherein the template has a first slope inclined in the first direction, and the nesting contacts the first slope. Since it has a 1st contact surface and has an urging means which urges the 1st contact surface toward the 1st slope, the nesting and the template in the 1st direction by the urging means The backlash between them can be eliminated.

  According to a third aspect of the present invention, there is provided the molding apparatus according to the second aspect, wherein the biasing means is fixed to the first surface of the mold with a bolt so that the first contact of the nesting is achieved. Since the lid member biases the back surface facing the contact surface, by pressing the back surface of the nest through the lid member by screwing the bolt, the nest and the template in the first direction Can be easily eliminated.

  According to a fourth aspect of the present invention, in the invention according to the third aspect, the lid member has a second inclined surface inclined in the first direction, and the nesting is in contact with the second inclined surface. Since the second contact surface is provided, the second contact surface of the insert is pressed by the second inclined surface of the lid member by the screwing amount of the bolt, so that the insert and the template in the first direction are pressed. Can be easily eliminated.

The molding apparatus according to claim 5, the maximum distance in the invention of claim 3 or 4, from the first contact surface when viewed from a direction perpendicular to the transfer surface to the transfer surface, the Since it is smaller than the maximum distance from the transfer surface to the back surface when viewed from the direction perpendicular to the transfer surface, the transfer surface is far from the surface of the mold that is sensitive to environmental temperature, and high-precision molding can be realized. .

According to a sixth aspect of the present invention, in the invention according to any one of the third to fifth aspects, the insert includes the first contact surface and the back surface when viewed from a direction perpendicular to the transfer surface. Since the maximum distance is variable, it is possible to adjust the position of the transfer surface.

  According to a seventh aspect of the present invention, in the invention according to the sixth aspect, the nesting includes a back side member having the first contact surface, an inlet side member having the back surface, and the back side member. Since the first spacer is disposed between the inlet side members, the position of the transfer surface can be adjusted by selecting and attaching the first spacer having a desired thickness.

Molding apparatus according to claim 8 is the invention according to claim 1, wherein the plate-like spacer is a second spacer provided between the front Symbol inner stepped portion and the nest since, by attaching to select the second spacer having a desired thickness, it is possible to perform the position adjustment of the transfer surface in the first direction.

  A molding apparatus according to a ninth aspect is the invention according to any one of the first to eighth aspects, wherein the template extends in a direction intersecting the first surface and the second surface. Since it has a 3rd surface, it is provided in the 3rd surface, and has a press means which presses the nest in the 2nd direction different from the 1st direction, thereby, in the 2nd direction by this The play between the insert and the template can be eliminated.

A molding apparatus according to a tenth aspect is the invention according to any one of the first to ninth aspects, wherein a plate-like third spacer is disposed between the side surface of the opening of the first surface and the insert. Therefore, by selecting and attaching the third spacer having a desired thickness, the position of the transfer surface in the second direction can be adjusted.

The molding apparatus according to claim 11, further comprising: a lid member having a second inclined surface inclined in the first direction, wherein the nesting has a second contact surface that contacts the second inclined surface, The lid member is urged toward the second contact surface.

  According to the present invention, it is possible to provide a molding apparatus capable of arbitrarily adjusting the position of the transfer surface.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of a vertical molding apparatus according to the present embodiment, and the vertical direction is the gravity direction (also referred to as the Z direction). In FIG. 1, a cylinder 1 having a movable piston 1a is installed on a surface plate (not shown) as a mold clamping mechanism. The mold clamping mechanism is not limited to the cylinder, and an electric toggle mechanism or the like can also be used. On the upper surface of the flange portion 1b formed at the upper portion of the cylinder 1, the lower ends of four round shaft-shaped tie bars 2 extending vertically are installed around the movable piston 1a. The upper end of the tie bar 2 is attached to the lower surface of the rectangular plate-like fixed platen 3 so as to support it. An injection unit 4 for injecting resin is provided on the upper part of the fixed platen 3.

  The upper surface of the upper receiving plate 5 is fixed to the lower surface of the fixed platen 3, and the upper surface of the upper mold plate 6 is fixed to the lower surface of the upper receiving plate 5. A nest 10 having a transfer surface is attached to the upper template 6 as will be described later.

  A lower mold plate 7 to which a nesting 20 having a transfer surface is attached is disposed so as to face the lower surface of the upper mold plate 6. The lower surface of the lower mold plate 7 is fixed to the upper surface of the lower receiving plate 8, and the lower surface of the lower receiving plate 8 is fixed to the upper surface of the rectangular plate-shaped movable platen 9. The central lower surface of the movable platen 9 is fixed to the upper end of the movable piston 1 a so as to move integrally, and the tie bar 2 penetrates the through hole 9 a of the movable platen 9.

  At the time of molding, when hydraulic pressure is applied to the cylinder 1, the movable piston 1 a is displaced upward in FIG. 1, whereby the movable platen 9 is also displaced upward while being guided by the tie bar 2. The lower mold plate 7 is also displaced upward, the lower insert 20 is brought into close contact with the upper insert 10 and the transfer surfaces thereof are matched to form a cavity.

  In such a state, the molten resin is injected from the injection unit 4 into the cavity via the supply path (not shown) in the upper receiving plate 5 and the upper mold plate 6 and solidified. Thereafter, when the hydraulic pressure in the cylinder 1 is reduced, the movable piston 1a is displaced downward in FIG. 1, and the lower receiving plate 8 and the lower mold plate 7 are also moved downward as the movable platen 9 is displaced downward. Therefore, the mold is released (opened), and for example, a molded product as an optical element can be taken out.

  FIG. 2 is a view of the upper template 6 fitted with four inserts 10 as viewed from the lower surface side, and FIG. 3 is a view of the configuration of FIG. . FIG. 4 is a view showing the insert 10 in an exploded state from the upper template 6. Here, the gravity direction is defined as the Z direction, the depth direction of the opening along the lower surface of the template 6 is defined as the X direction, and the direction orthogonal thereto is defined as the Y direction. Further, the first direction refers to the downward direction in the Z direction. Hereinafter, although it demonstrates about one nest | insert 10, since the relationship between the other nest | insert 10 and the nest | insert 20 and the lower side template 7 is also the same, description is abbreviate | omitted.

  In FIG. 4, the side surface into which the insert 10 of the template 6 is inserted is the first surface 6a, the lower surface of the template 6 is the second surface 6b, and the side surface intersecting the first surface 6a and the second surface 6b. Is the third surface 6c. A groove 6d is formed in the second surface 6b from the first surface 6a to a predetermined distance. The groove 6d opens to the first surface 6a to form an opening 6e, and opens to the second surface 6b to form an opening 6f. The opening 6e and the opening 6f that are orthogonal to each other are connected at an intersection. Bolt holes 6g and 6g are formed on both sides of the opening 6e, and a bolt hole 6h is also formed in the third surface 6c.

  The opening 6e of the first surface 6a has an open lower edge, and a pair of opposing surfaces 6i and 6i are formed in parallel on both sides of the opening. Above the opposing surfaces 6i, 6i, side surfaces 6j, 6j common to the openings 6e and 6f are formed in parallel to the third surface 6c. The interval between the opposing surfaces 6i, 6i is W1, and the interval between the side surfaces 6j, 6j is W3 (> W1) which is larger than that. Therefore, inner step portions 6k and 6k are formed between the facing surfaces 6i and 6i and the side surfaces 6j and 6j so as to protrude toward each other.

  The inner surface 6m of the opening 6e is parallel to the first surface 6a, and a first inclined surface 6n extending from the upper edge to the lower edge of the inner surface 6m is formed at the center thereof. The first inclined surface 6n is formed upward in the Z direction, and the lower end thereof terminates in the opening 6f of the second surface 6b. Accordingly, the upper surface of the opening 6e is formed such that the edge away from the first surface 6a is convex.

  In FIG. 4, the insert 10 is assembled by fixing the back side member 11 and the inlet side member 12 with a first spacer 13 between them and fixing with a bolt (not shown). In the assembled state, the insert 10 has a shape in which the plate-like portion 10b is joined to the side surface (the lower surface in FIG. 4) of the large prism portion 10a.

  The width W2 of the large prism portion 10a is larger than the interval W1 between the facing surfaces 6i and 6i of the template 6 and smaller than the interval W3 between the side surfaces 6j and 6j (that is, W3> W2> W1). The plate-like portion 10b has, for example, a transfer surface 10c for forming an optical surface of an optical element on the lower surface. Furthermore, the insert 10 forms a first contact surface 10d that is an inclined surface corresponding to the first inclined surface 6n at the center of the surface of the inner member 11 facing the inner side.

  Here, as shown in FIG. 2, the distance A from the tip of the first contact surface 10d to the center of the transfer surface 10c is smaller than the distance B from the center of the transfer surface 10c to the back surface 10e of the insert 10 (A < B) The distance A from the first contact surface 10d to the center of the transfer surface 10c is changed by changing the thickness of the first spacer 13, but the relationship of A <B is not changed. is there.

  Further, in FIG. 4, the maximum length L1 of the insert 10 in the X direction is slightly larger than the maximum length L2 of the opening 6f in the X direction (L1> L2).

  At the center of the lower edge of the back surface 10e of the nest 10, a second contact surface 10f that is an inclined surface inclined to the back side is formed. Further, a lid member 14 is provided so as to face the back surface 10 e of the insert 10. The lid member (biasing means) 14 has a rectangular flat plate shape as a whole. However, the lid member (biasing means) protrudes in the X direction from the center of the upper end and is inclined in the Z direction upward corresponding to the second contact surface 10f. A slope 14a is formed, and bolt holes 14b and 14b are formed on both sides. In the present embodiment, the thin plate-like first spacer 13, the second spacer 19, and the third spacer 16 constitute the adjusting means.

  Next, a mode in which the insert 10 is assembled to the upper template 6 will be described. In FIG. 4, a second spacer 19 having a desired thickness is disposed between the opening 6 e and the upper surface of the nest 10, and a third spacer having a desired thickness is disposed between the opening 6 e and the side surface of the nest 10. 16 is arranged, and the insert 10 is inserted from the opening 6a. At this time, since the plate-like portion 10b has a size that can be accommodated in the facing portions 6i and 6i, the plate-like portion 10b enters so as to close the opening 6f. Further, since the width W2 of the large prism portion 10a is larger than the interval W1 between the opposing surfaces 6i, 6i of the template 6, the insert 10a does not fall through the opening 6f. In this state, the transfer surface 10c of the insert 10 is exposed from the opening 6f and faces downward in the Z direction. Finally, the insert 10 is inserted to a position where the first contact surface 10d contacts the first inclined surface 6n of the template 6.

  Next, the lid member 14 is applied to the back surface 10e of the insert 10 exposed from the opening 6a, the bolts 15 and 15 are inserted into the bolt holes 14b and 14b, and screwed into the bolt holes 6g and 6g of the first surface 6a of the template 6. . As described above, the maximum length L1 in the X direction of the insert 10 is slightly larger than the maximum length L2 in the X direction of the opening 6f (L1> L2). 14, the back surface 10e of the insert 10 is pressed, and the first contact surface 10d presses the first inclined surface 6n in the opening 6e, so that the play between the insert 10 and the template 6 in the X direction is prevented. Thus, the position of the transfer surface 10c in the X direction can be adjusted with high accuracy. In addition, what is necessary is just to change to the 1st spacer 13 which selected thickness, when adjusting the position of the X direction of the transfer surface 10c.

  Further, when the lid member 14 is applied to the back surface 10e of the insert 10 exposed from the opening 6a, the second inclined surface 14a comes into contact with the second contact surface 10f of the insert 10, so that the screw force of the bolts 15 and 15 is increased. Thus, when the second inclined surface 14a presses the second contact surface 10f of the insert 10, the inlet side of the insert 10 is biased upward in the Z direction. On the other hand, since the first inclined surface 6n presses the first contact surface 10d with the same screw force, the back side of the insert 10 is also urged upward in the Z direction. As described above, the large prismatic portion 10a of the insert 10 is urged against the ceiling surface of the opening 6e with the second spacer 19 interposed therebetween, thereby the backlash between the insert 10 and the template 6 in the Z direction. Is eliminated, and the position of the transfer surface 10c in the Z direction can be adjusted with high accuracy. In addition, what is necessary is just to change to the 2nd spacer 19 which selected thickness, when adjusting the position of the Z direction of the transfer surface 10c.

  Further, the bolt 17 is screwed into the bolt hole 6 h of the third surface 6 c of the template 6. Since the tip of the bolt 17 contacts the side surface of the insert 10, the insert 10 can be pressed against the side surface 6 j facing the bolt hole 6 h by screwing the bolt 17. As a result, play between the nesting 10 and the template 6 in the Y direction (second direction) is eliminated, and the position of the transfer surface 10c in the Y direction can be accurately adjusted. Here, the bolt 17 and the bolt hole 6h constitute a pressing means. In addition, what is necessary is just to change to the 3rd spacer 16 which selected thickness, when adjusting the position of the Y direction of the transfer surface 10c.

  Note that pipes for temperature adjustment are often embedded in the template 6, so that the internal temperature and the external temperature of the template 6 may be greatly different, but as shown in FIG. 1 The distance A from the tip of the abutting surface 10d to the center of the transfer surface 10c is made smaller than the distance B from the center of the transfer surface 10c to the back surface 10e of the insert 10 (A <B), regardless of the environmental temperature. There is an advantage that the temperature of the transfer surface 10c can be kept constant. It is optional to provide temperature adjustment piping on the lid member 14 as well.

  FIG. 5 is a view of the insert 10 'according to the modification viewed from the back side, and FIG. 6 is a view of the configuration of FIG. 5 cut along the VI-VI line and viewed in the direction of the arrow. The insert 10 'according to this modification is integrally formed, but has the same shape as the above-described embodiment as a whole. However, a bolt hole 10p is formed in the center of the rear slope 10d ', and a rectangular plate-like spacer 13' also serving as a first contact surface is a bolt whose head is embedded in the counterbore 13a '. 18 is fixed to the inclined surface 10d ′. The configuration of the template 6 is the same as that of the above-described embodiment.

  According to this modification, when the lid member 14 (see FIG. 4) is applied to the back surface 10e ′ of the insert 10 ′ and the bolts 15 and 15 (see FIG. 4) are screwed in, the first inclined surface 6n is caused by the screw force. Since the inclined surface 10d ′ is pressed via the spacer 13 ′, the insert 10 ′ is biased downward in the X direction and the Z direction. When adjusting the position of the transfer surface 10c 'in the X direction and the Z direction, the thickness may be changed to the spacer 13' having a selected thickness.

  The present invention is particularly suitable for molding optical elements, but is not limited to this, and can of course be applied to all moldings capable of injection molding.

It is the schematic of the saddle forming apparatus concerning this Embodiment. It is the figure which looked at the upper side template 6 equipped with the four inserts 10 from the lower surface side. It is the figure which cut | disconnected the structure of FIG. 2 by the II-II line | wire, and looked at the arrow direction. It is a figure which shows the nest | insert 10 in the state decomposed | disassembled from the upper side template 6. It is the figure which looked at the nest | insert 10 'concerning the modification from the back side. It is the figure which cut | disconnected the structure of FIG. 5 by the VI-VI line and looked at the arrow direction.

DESCRIPTION OF SYMBOLS 1 Cylinder 1a Movable piston 1b Flange part 2 Tie bar 3 Fixed platen 4 Injection unit 5 Upper receiving plate 6 Upper mold plate 6a Opening 6a First surface 6b Second surface 6c Third surface 6d Groove 6e Opening 6f Opening 6g Bolt hole 6h Bolt hole 6i, 6i Opposing surface 6j, 6j Side surface 6k Inner step 6m Back surface 6n Slope 7 Lower mold plate 8 Lower receiving plate 9 Movable platen 9a Through-hole 10 Nest 10a Large square column 10b Plate-like portion 10c Transfer surface 10d contact surface 10d 'slope 10e back surface 10f contact surface 10p bolt hole 11 back side member 12 inlet side member 13 first spacer 14 lid member 14a slope 14b bolt hole 15 bolt 16 third spacer 17 bolt 18 bolt 19 second spacer 20 nesting

Claims (11)

A molding apparatus having a template having a first surface and a second surface that extend in directions intersecting each other, and a nest having a transfer surface,
The insert is inserted into the template from the opening of the first surface, and the transfer surface is exposed through the opening of the second surface,
The inside of the opening of the second surface is widened to form an inner step,
In a state where the insert is inserted into the template, the insert does not pass through the opening of the second surface by being hooked on the inner stepped portion,
An adjusting means for adjusting the position of the nesting in the first direction with the transfer surface facing the template is provided ,
The adjusting means is a plate-like spacer,
The molding apparatus according to claim 1, wherein the first direction is a gravitational direction .   The template has a first inclined surface inclined in the first direction, and the nesting has a first contact surface that contacts the first inclined surface, and the first plate faces the first inclined surface. The molding apparatus according to claim 1, further comprising a biasing unit that biases the contact surface.   The urging means is a lid member that urges the back surface of the nesting facing the first contact surface by being fixed to the first surface of the mold with a bolt. The molding apparatus according to claim 2.   The molding according to claim 3, wherein the lid member has a second inclined surface inclined in the first direction, and the nesting has a second contact surface that contacts the second inclined surface. apparatus. The maximum distance from the first contact surface when viewed from a direction perpendicular to the transfer surface to the transfer surface, the maximum distance from the transfer surface when viewed in the direction perpendicular to the transfer surface to the back The molding apparatus according to claim 3, wherein the molding apparatus is smaller. The molding according to any one of claims 3 to 5, wherein the nesting has a variable maximum distance between the first contact surface and the back surface when viewed from a direction perpendicular to the transfer surface. apparatus. The insert includes a back side member having the first contact surface, an entrance side member having the back surface, and a plate-like first spacer disposed between the back side member and the entrance side member. The molding apparatus according to claim 6. The plate-shaped spacer, The apparatus according to any of claims 1 to 7, characterized in that a second spacer provided between the before and Symbol inner stepped portion nested.   The template has a third surface extending in a direction intersecting the first surface and the second surface, and is provided on the third surface, and the nesting is disposed on the first surface. The molding apparatus according to claim 1, further comprising a pressing unit that presses in a second direction different from the first direction. The molding apparatus according to any one of claims 1 to 9, wherein a plate-like third spacer is disposed between a side surface of the opening of the first surface and the insert. The molding apparatus has a lid member having a second slope inclined in the first direction,
The nest has a second contact surface that contacts the second slope,
The molding apparatus according to claim 1 , wherein the lid member is biased toward the second contact surface .

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