JP2014200993A - Manufacturing apparatus for molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing apparatus for molded articles capable of molding even a complicatedly shaped molded article as well as reducing the cycle time of manufacturing a molded article.SOLUTION: A manufacturing apparatus 1 which assembles a child workpiece J2 to a parent workpiece J1 formed of a resin sheet S, comprises: a vacuum molding die 2 for absorbing the resin sheet S to mold the parent workpiece J1; an injection molding die 3 disposed facing the vacuum molding die 2 across the resin sheet S; a boring body 17 as boring means 4 for boring a through-hole through the absorbed parent workpiece J1; and child workpiece supply means 5 for applying the child workpiece J2 to the absorbed parent workpiece J1 such that an opening 7 of the child workpiece J2 overlies the through-hole in the parent workpiece J1. The child workpiece J2 is assembled to the absorbed parent workpiece J1 by injecting resin into a first cavity 12 and a second cavity 14 in communication with each other via the opening 7 and the through-hole.

Description

  The present invention relates to an apparatus for manufacturing a molded product.

  As an apparatus for manufacturing a molded product, there is a vacuum molding apparatus that molds a resin sheet in close contact with a mold by vacuuming. In this vacuum forming apparatus, when the mold has a complicated shape such as unevenness, there is a problem that the flat resin sheet cannot follow the shape of the mold and is partially thinned or easily wrinkled. is there.

  In order to solve this problem, Patent Document 1 describes a technique in which a resin sheet is clamped by a clamp member so that a part of the resin sheet is slackened, and vacuum forming is performed in a state in which a part of the resin sheet is slackened. By doing so, it is described that the sag portion is deeply drawn or formed into a complicated shape to prevent the resin sheet from being thinned and wrinkled.

JP 2009-39862 A

  The technique of Patent Document 1 seems to be effective for a certain degree of unevenness of the mold, but may not be able to cope with the formation of a rib or the like having a height. Further, since the vacuum forming apparatus is formed by partially projecting a flat resin sheet on either the front or back side, the other side of the part is subjected to the restriction that it becomes a concave shape, for example, the resin sheet It is not possible to deal with complicated shapes such as providing convex shapes on both the front and back in a certain part. In this case, a method is conceivable in which a complicated shape portion is separately configured as a child component, a resin sheet is formed by a vacuum forming apparatus and taken out of the mold, and then the child component is assembled. However, this method requires a step of assembling the child parts in addition to the vacuum forming step, and there is a problem that the manufacturing steps of the molded product increase.

  The present invention was created to solve such problems, and provides a molded product manufacturing apparatus capable of molding a molded product having a complicated shape and shortening the manufacturing cycle time of the molded product. For the purpose.

  In order to solve the above-mentioned problems, the present invention is a manufacturing apparatus for assembling a child part to a parent part made of a resin sheet, and a vacuum forming die for adsorbing the resin sheet to form the parent part, and a vacuum sandwiched between the resin sheets. An injection mold provided opposite to the mold, a punching means for opening a through hole in the sucked parent part, and a child part to the sucked parent part so that the opening of the child part overlaps the through hole A first cavity formed on the vacuum mold side and a second cavity formed on the injection mold side communicating with each other through the opening and the through hole. By injecting, the child part is assembled to the parent part in the suction state.

  According to the present invention, molding of a complicated shape can be handled by a child part made of a member different from the parent part. Since the parent part molding process and the assembly process of the parent part and the child part by injection molding can be performed substantially in parallel, the manufacturing cycle time of the molded product can be shortened.

  Further, the present invention is characterized in that the child component supply means is provided in an injection mold.

  According to the present invention, the sub-part supply means can have a simple and compact structure, and the assembly cost of the manufacturing apparatus can be reduced and the space can be saved.

  According to the present invention, a molded product having a complicated shape can be molded, and the manufacturing cycle time of the molded product can be shortened.

It is side sectional drawing of the manufacturing apparatus of the molded article which concerns on this invention. It is operation | movement explanatory drawing of the manufacturing apparatus of the molded article which concerns on this invention. It is a sectional side view which shows an example of a molded article.

  In FIG. 1, a molded product manufacturing apparatus (hereinafter simply referred to as a manufacturing apparatus) 1 according to the present invention is a manufacturing apparatus for assembling a child part J2 to a parent part J1 formed by molding a resin sheet S. The manufacturing apparatus 1 includes a vacuum forming mold 2 that adsorbs a resin sheet S to form a parent part J1, an injection mold 3 that is provided to face the vacuum forming mold 2 with the resin sheet S interposed therebetween, and a parent in an adsorbing state. The punching means 4 for opening the through hole 6 (FIG. 2) in the part J1 and the child part J2 are applied to the parent part J1 in the suction state so that the opening 7 of the child part J2 overlaps the through hole 6 (FIG. 2). A sub-part supply means 5.

"Vacuum forming mold 2"
The upper surface of the vacuum mold 2 is configured as a molding surface for molding the parent part J1 and is installed in the lower frame 8. A hermetic suction chamber 9 that is evacuated by a vacuum pump (not shown) is formed below the vacuum mold 2, and the vacuum mold 2 is provided with a plurality of suction holes 10 that connect the molding surface and the suction chamber 9. ing. The resin sheet S is made of a thermoplastic resin such as polyethylene or polypropylene, is heated in advance and is conveyed by a conveying device (not shown) in a formable state, and is supplied to the vacuum mold 2. As described above, as shown in FIG. 2, the resin sheet S is evacuated through the suction chamber 9 and the suction hole 10 and is adsorbed on the molding surface of the vacuum mold 2 to be molded as the parent part J1. The structure of the above vacuum forming mold 2 is a conventionally well-known thing.

  An injection receiving member 11 is fitted into a part of the vacuum forming die 2. The upper surface of the injection receiving member 11 is at a lower position than the molding surface around the injection receiving member 11. The concave space above the injection receiving member 11 constitutes the first cavity 12.

"Injection mold 3"
An injection mold 3 is disposed above the vacuum mold 2. The injection mold 3 is configured to be movable up and down with respect to the molding surface of the vacuum mold 2 by being attached to an upper frame 13 that is moved up and down by a drive source (not shown). A concave second cavity 14 is formed on the lower surface of the injection mold 3. The second cavity 14 is formed at a position facing the first cavity 12.

  An example of the injection molding machine is a known pre-plunger type injection molding machine. The pre-plunger injection molding machine presses a molding material kneaded by rotation and heating of a screw into an injection chamber and then injects it from an injection member 15 such as a plunger. FIG. 1 shows only some injection members 15 such as a plunger among the components of the pre-plunger type injection molding machine. The lower end of the injection member 15 is attached to the injection mold 3 so as to penetrate vertically, and the injection port at the tip of the injection member 15 faces the second cavity 14. Further, the temperature adjusting means 16 is formed in the injection mold 3.

"Perforation means 4"
The perforating means 4 is composed of a perforated body 17 that can be moved up and down. The upper portion of the perforated body 17 is formed at the tip. Reference numeral 18 denotes a drive source for the perforated body 17, for example, an air cylinder. The perforated body 17 is attached to the upper end of the rod of the air cylinder. The punched body 17 is guided and lifted by a guide hole 19 formed in the injection receiving member 11, passes through the first cavity 12, and punches the through hole 6 in the parent part J <b> 1 in the suction state. The perforated body 17 may be composed of a rotatable drill member.

"Sub-part supply means 5"
For example, the child component J2 is a component that has a shape that is difficult to be molded only by the adsorption of the mold 2. The material is not necessarily the same as that of the parent part J1, and may be a part made of metal, rubber, or the like. The child component J2 shown in FIG. 1 has a shape having a base portion 20 extending horizontally and a rising portion 21 standing upward from the periphery of the base portion 20. The base 20 is formed with an opening 7 made of a hole, a notch or the like. Note that the child component J2 may be a member that includes only the base portion 20 without the rising portion 21.

  In this embodiment, the child component J2 is a steel plate, and a magnet 22 is fitted on the lower surface of the injection mold 3. The child component J2 is attracted by the magnet 22 and attached to the lower surface of the injection mold 3. When the injection mold 3 is lowered, the child part J2 is applied to the parent part J1 in the suction state so that the opening 7 of the child part J2 overlaps the through hole 6 (FIG. 2) of the parent part J1. . That is, in this embodiment, the child component supply means 5 is configured by the injection mold 3 and the magnet 22.

  Besides the structure using the magnet 22, for example, a clamp mechanism may be provided in the injection mold 3 so that the child part J2 is gripped by this clamp mechanism, or a structure in which the child part J2 is adsorbed by vacuum. Further, the supply form of the child part J2 to the injection mold 3 is not particularly limited in the present invention. For example, the child part J2 is injected by moving the injection mold 3 to the stock location of the child part J2. You may make it attach to the shaping | molding die 3, and you may make it attach the subcomponent J2 to the injection molding die 3 using the robot arm etc. which are not shown in figure.

"Action"
An example of the operation of the manufacturing apparatus 1 will be described with reference to FIG. FIG. 2A shows a state in which the resin sheet S (FIG. 1) is evacuated through the suction chamber 9 and the suction hole 10 and is attracted to the molding surface of the molding die 2 to be molded as the parent part J1. The perforated body 17 is in the lowered position.

  From the state of FIG. 2 (a), as shown in FIG. 2 (b), the perforated body 17 rises to make the through hole 6 in the parent part J1, and the injection mold 3 descends around this and the child mold 3 descends. Part J2 is assigned to parent part J1. The opening 7 of the child part J2 is positioned so as to overlap the through hole 6 of the parent part J1. Next, as shown in FIG. 2C, the perforated body 17 is lowered, and the first cavity 12 formed on the vacuum mold 2 side and the second cavity 14 formed on the injection mold 3 side are connected to the through holes 6 and They communicate with each other through the opening 7.

  Next, in FIG. 2D, the injection material 23 is injected from the injection member 15 into both the first cavity 12 and the second cavity 14. As a result, as shown in FIG. 3, the child component J2 is assembled to the parent component J1 in such a manner that it is sandwiched between the injection material 23 formed above and below the through hole 6 of the parent component J1 and the opening 7 of the child component J2. The formed product J is formed.

  As described above, the vacuum mold 2, the injection mold 3, the punching means 4, and the child part supply means 5 are provided, and communicate with each other through the opening 7 of the child part J 2 and the through hole 6 of the parent part J 1. By injecting the injection material 23 into the first cavity 12 formed on the mold 2 side and the second cavity 14 formed on the injection mold 3 side, the parent part J1 in the suction state of the vacuum mold 2 is placed on the child part J1. According to the manufacturing apparatus 1 for assembling the part J2, a complicated shape can be formed by the child part J2 made of a member different from the parent part J1. Since the parent part J1 molding process by vacuum molding and the assembly process of the parent part J1 and the child part J2 by injection molding can be performed substantially in parallel, the manufacturing cycle time of the molded article J can be shortened.

  Further, as in this embodiment, if the child component supply means 5 is constituted by the injection mold 3 and the magnet 22 attached to the injection mold 3, that is, the child component supply means 5 is provided in the injection mold 3. If so, the child component supplying means 5 can be made simple and compact, and the assembly cost of the manufacturing apparatus 1 can be reduced and the space can be saved.

The preferred embodiment of the present invention has been described above. The perforating means 4 is not limited to the configuration provided in the vacuum mold 2 and can be provided separately or on the injection mold 3 side.
In the embodiment described above, the injection mold 3 is disposed on the upper side, and the vacuum mold 2 is disposed on the lower side. However, the vacuum mold 2 is disposed on the upper side, and the injection mold 3 is disposed on the lower side. It may be configured.

DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus of a molded article 2 Vacuum molding die 3 Injection molding die 4 Punching means 5 Child component forming means 6 Through-hole 7 Opening part 12 1st cavity 14 2nd cavity 15 Injection member 17 Punched body 22 Magnet 23 Injection material J Molded article J1 Parent part J2 Child part

Claims (2)

A manufacturing apparatus for assembling a child part to a parent part made of a resin sheet,
A vacuum forming mold for adsorbing a resin sheet and forming a parent part;
An injection mold provided opposite to the vacuum mold with the resin sheet interposed therebetween;
A drilling means for opening a through hole in the parent part in the suction state;
Child component supply means for applying the child component to the parent component in the suction state such that the opening of the child component overlaps the through hole;
With
By injecting resin into the first cavity formed on the vacuum mold side and the second cavity formed on the injection mold side communicating with each other through the opening and the through hole, the parent part in the suction state An apparatus for manufacturing a molded product, characterized in that a child part is assembled to the machine.   2. The apparatus for manufacturing a molded product according to claim 1, wherein the sub component supply means is provided in an injection mold.

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