KR100863353B1 - multi component injection mold assembly - Google Patents

Abstract

According to the present invention, the multi-die assembly includes a lower plate supported by a lower fixing plate and having a plurality of first molding core mounting portions formed in a circumferential direction; A top plate supported by an upper fixing plate and provided with a second molding core mounting portion at a side corresponding to the first molding core mounting portion; A molding core unit having a first molding core respectively inserted into the first molding mounting part, and a second molding core supported on the second molding mounting part and coupled to the first molding core to form a cavity for forming a product; And a runner is formed in the upper fixing plate, the upper plate and the lower plate to supply resin to the cavity of the molding core unit. The multi mold assembly according to the present invention is suitable for multi-product co-production.

Multi injection, mold, 1st, 2nd forming core

Description

Multi component injection mold assembly

1 is an exploded perspective view of a multi injection mold according to the present invention;

2 is a cross-sectional view of a multi injection mold according to the present invention;

The present invention relates to an injection mold, and more particularly, to a multi-mould assembly capable of simultaneous molding of various heterogeneous products and easy exchange of a core unit for molding.

In general, multi-colored products with two or more colors, or two or more structures in one product are complex, or in order to simultaneously mold products with the same shape but different specifications, it is necessary to divide injection molds into several sets. Multi injection method is adopted to reduce the burden.

The multi-injection method is a method of mounting and injecting a different product into a mold, and manufacturing two different molds and mounting them on one injection machine at the same time, and then injecting a second product by rotating the movable template after the first injection. The rotary method and the ten-table method in which the movable side template is rotated after injection of the primary product and the secondary and tertiary products are injected.

As a method of manufacturing a plurality of molds having different specifications and manufacturing an injection product, workability is inferior, and the molds need to be replaced every time the production quantity or specification is changed, resulting in a decrease in workability and productivity as well as a relatively high production cost. The turntable method has a problem in that the injection molding machine and the mold become relatively large.

Republic of Korea Patent Publication No. 2000-0049735 discloses a multi-injection mold structure, and Patent No. 10-0091724 discloses a multi-injection mold rotary injection machine.

And Patent Publication No. 2002-0064859 discloses a multi-injection mold by the rotation method, registered Utility Model No. 0317955 discloses a rotary operation structure of the rotary multi-injection mold. The disclosed injection mold is capable of performing injection molding operations of different materials by rotating and rotating the rotating plate in a cylinder and rack pinion manner. However, this injection molding method is relatively complicated in structure because the rotation and elevating means is installed in the mold, and cannot improve productivity.

In particular, various sleeves used in optical communication cable have different shape and dimensions of inner diameter, outer diameter and overall length. Therefore, all molds must be prepared according to their specifications. There is a problem that takes a lot of work maneuver according to the mounting and separation of the mold to the injection machine. In addition, there is a problem that the life of the mold is relatively shortened due to frequent replacement work.

The present invention is to solve the problems as described above, the structure is relatively simple, can be molded at the same time different products of different specifications, the multi-mould assembly is easy to replace the core unit for molding the unit product The purpose is to provide.

Another object of the present invention is to reduce the mold manufacturing cost according to the molding of various specifications and heterogeneous products, and to provide a multi-mold assembly that is easy to control the output of each product.

Another object of the present invention is to provide a multi-die assembly which can simultaneously mold sleeves having different specifications used in the optical communication connection cable, and can reduce the production cost according to manufacturing.

In order to achieve the above object, the multi-die assembly of the present invention

A lower plate supported on an upper surface of the lower fixing plate and having a plurality of first molding core mounting portions formed in a circumferential direction;

A upper plate supported on a lower surface of the upper fixing plate and provided with a second molding core mounting portion at a side corresponding to the first molding core mounting portion;

Molding core units each having a first molding core inserted into the first molding mounting part, and a second molding core supported on the second molding mounting part and combined with the first molding core to form a cavity for forming a product; Equipped with

Runners are formed on the upper fixing plate, the upper plate and the lower plate to supply resin to the cavities of the respective molded core units.

In the present invention, a guide member for guiding the coupling of the first and second molding cores is provided. A center pin penetrating the upper fixing plate, the first forming core and the second forming core and penetrating the cavity to form a hollow in the molded article is further provided. The cross-sectional area of the runner is formed differently according to the volume of the cavity formed in the molding unit.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The multi-injection mold according to the present invention can be used for different products, that is, optical communication connection cable, which can simultaneously mold different specifications, and one embodiment is shown in FIGS. 1 and 2.

Referring to the drawings, the multi-mould assembly 10 is supported by the lower fixing plate 11 and the lower plate 20 is formed with a plurality of first forming core mounting portion 21 in the circumferential direction, and the upper fixing plate 12 And the upper plate 30 having the second molding core mounting portion 31 formed at a portion corresponding to the first molding core mounting portion 21. Here, the lower plate 20 and the upper plate 30 may include a first and second molding cores for supplying resin to the first and second molding cores installed in the first and second molding core mounting portions 21 and 31, which will be described later. Two runner forming portions 22 and 32 are formed, respectively, and the first and second molded core mounting portions 21 and 31 are formed around the first and second runner forming portions 22 and 32. In addition, the upper fixing plate 12 and the first runner forming part 22 are formed with a resin supply passage 15 communicating with the soup bush 13 installed in the upper fixing plate 12, and forming the first and second runners. Runners 16 connected to the resin supply passage 15 are formed on opposite surfaces of the portions 22 and 32. Here, the cross-sectional area of the runners 16 is formed differently depending on the size of the cavity formed by the combination of the first and second molding cores.

The first and second molded core mounting parts 21 and 31 respectively include first and second molded cores 40 and 50 for forming a cavity for molding a product, that is, a sleeve used for an optical connection cable. By being provided, the core units 60 are provided.

In the first and second molding cores 40 and 50 constituting the core unit 60, a passage is formed in the cavity so that the cavity formed by the combination thereof is connected to the runner 16. Here, the cavity for forming the product formed by each core unit 60 may be formed differently. If necessary, the core unit 60 may be replaced with a standard to be mass produced.

The upper plate 30 penetrates through the upper plate 30 and the first forming core 40 or the second forming core 50 attached thereto to form a hollow of a molded product, that is, a sleeve and a first The center pin 61 is installed to serve as a centering function of the two forming cores 40 and 50. In addition, at least one guide pin 62 may be installed in the first molding core 40 and the second molding core 50 to guide a combination thereof.

In addition, the lower support plate 18 is further provided with an ejecting portion 70 having an eject pin 71 for penetrating the lower plate 50 to take out the molded article when the first and second molding cores are separated. Referring to the operation of the multi-mold assembly according to the present invention configured as described above are as follows.

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In order to mold the product, that is, the sleeve used for the optical communication connection cable using the multi-mold assembly 10 according to the present invention, the first and second molding cores of the core unit 60 having a cavity of a standard to be molded ( 40 and 50 are attached to the lower plate 20 and the upper plate 30, respectively. Here, the core unit 60 is preferably mounted in consideration of the cross-sectional area of the runner 16 formed by the upper plate 30 and the lower plate 20. In this state, the center pin 61 penetrates from the upper fixing plate 12 and the first and second molding cores 40 and 50 to form the sleeve.

In this state, the upper and lower plates 40 and 50 are transferred and molded, and the molten resin is supplied to the sprue bushes formed on the upper fixing plate 11 by using the nozzle of the injection molding machine. The resin thus supplied is supplied to the cavity formed in the first and second molding cores 40 and 50 of each core unit 60 through the resin supply passage 15 and the runner 16.

The cavity formed by the first and second molding cores 40 and 50 by the supply of the resin may have a hollow by the center pin 61, thereby forming a cylindrical sleeve. In this process, since the cross-sectional area of the runner 16 is formed differently according to the size of the cavity, the first and second forming cores 40 and 50 are supplied through the resin supply passage 15 and the respective runners 16. By the pressure acting on the cavity can be made constant to prevent the occurrence of burrs that can occur during molding.

When the supply of the resin is completed, the first and second molding cores 40 and 50 supported on the upper and lower plates are separated and the product is taken out using the eject pin 71.

In the process of molding the product as described above, if the part of the product is required to be molded by adjusting the amount of production according to the standard, the first and second molding cores of the core unit required for the molding of this product are not required or the quantity is relatively high. This less interchangeable core unit and the product is molded in the manner described above.

As described above, the multi-mold assembly according to the present invention can mold products of different specifications using a single mold, and thus can simultaneously mold products of various specifications, and can control the amount of production of specific products. Do. Since core units are installed for injection molding a plurality of unit products of a mold assembly, multi-type simultaneous production is possible by adjusting the number of core units or installing core units of a standard to be produced.

 Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (3)

A lower plate supported by the lower fixing plate and having a plurality of first molded core mounting portions formed in a circumferential direction; A top plate supported by an upper fixing plate and having a second molding core mounting portion installed on a side corresponding to the first molding core mounting portion; A molding core unit having a first molding core respectively inserted into the first molding core mounting portion, and a second molding core supported on the second molding core mounting portion and combined with the first molding core to form a cavity for forming a product; ; A guide member for guiding the coupling of the first and second molding cores, and a center pin inserted into the upper fixing plate, the first molding core, and the second molding core and penetrating the cavity to form a hollow in the molded article, A resin supply passage communicating with the soup bush installed in the upper fixing plate is formed in the upper fixing plate and the upper plate, and runners are provided to supply the resin to the cavity in the first and second runner forming portions of the upper and lower plates. Multi-die assembly. delete The method of claim 1, And a cross section of each runner for supplying a resin to a cavity formed by the first and second molding cores, the cross section of each of the upper and lower plates being formed in accordance with the volume of the cavity.

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