KR101083530B1 - Vacuum injection molding machine for rubber product - Google Patents

Abstract

The present invention relates to a vacuum injection molding apparatus for a rubber product, which has a vacuum device and can significantly reduce the nozzle length to prevent deformation of injected raw materials, thereby improving moldability and providing ease of maintenance and mold replacement. The lower frame, which is held up and guided by a piston, is raised and lowered by a piston, and the upper frame, the upper mold on the top of the guide, an extruding material for supplying the raw material, and a nozzle for injecting the raw material into the upper and lower molds. A rubber product vacuum injection molding apparatus comprising an upper frame installed with a pusher and a vacuum chamber for maintaining the upper and lower molds in a vacuum state;

The vacuum chamber includes a chamber flange formed to protrude integrally at the lower edge of the upper frame, a chamber body having upper and lower parts open to the outside of the chamber flange, and a lower plate forming and fixing a mold hole at the bottom of the chamber body. A chamber cylinder is installed on the upper surface of the upper frame and connects both sides of the lower plate to move up and down. It is characterized by.

Rubber Products, Vacuum Injection, Molding, Mold, Vacuum Chamber

Description

Vacuum Injection Molding Device for Rubber Products {VACUUM INJECTION MOLDING MACHINE FOR RUBBER PRODUCT}

The present invention relates to a vacuum injection molding apparatus for rubber products, and more particularly, to provide a vacuum injection molding apparatus having an improved vacuum chamber for increasing moldability by maintaining the upper and lower molds for forming a product in a vacuum state. It is about.

In general, injection molding refers to molding raw materials such as resin or rubber in a cylinder and gelling them, and then injecting them into upper molds and lower molds having heat to form desired shapes through heat. .

In the case of injection molding in the air as described above, gas is generated due to the heat curing of the air and the material remaining inside the mold, and bubbles are generated during the molding process, thereby causing defects due to bubbles inside and outside of the molded product. It causes.

In order to solve such a problem, the vacuum chamber is used to remove the air in the upper and lower mold positions, maintain the vacuum state, and inject the raw material to improve moldability.

The vacuum chamber as described above is a situation that has been developed and used in the prior art and looking at a typical example through Figure 5, it is divided into a fixed chamber (1) and a movable chamber (2).

The fixed chamber 1 is maintained as a guide in which the upper frame 6 having the nozzle 3 and the chamber 4, the pusher and the extender for raw material injection is supported on the main frame, and the upper frame 6 The chamber guide 7 is installed below.

The upper mold (8) is connected to the lower side of the chamber guide (7), the upper and lower molds (8, 9) on the outside of the chamber guide (7) through the airtight material to maintain the vacuum state Install.

The chamber 4 is connected to the cylinder 10 installed in the upper frame 6 to move in the up and down direction of the chamber guide 7, while the lower frame (4) the lower frame (9) 11) It is configured to maintain the vacuum state by connecting the upper surface and airtight.

The movable chamber 2 is composed of an inner chamber 20 which is directly coupled to the chamber guide 7 by holding it in an airtight manner, and an out chamber 21 which is coupled to the inner chamber 20 by keeping it in an airtight manner. 20 and the out chamber 21 are provided with a stopper for separation prevention.

The out chamber 21 is connected to the cylinder 10 installed in the upper frame 9 to operate in conjunction with the inner chamber 20 so that the lower frame 11 and the lower end are connected to each other to maintain a vacuum state. .

In the prior art as described above, by further providing a chamber guide in the lower part of the upper frame to maintain the vacuum chamber, the length of the nozzle for injecting the raw material into the upper mold becomes long, which causes poor moldability.

That is, the raw material is formed in the state filled with moving along the raw material line of the upper mold and the lower mold through the nozzle, the length of the nozzle is lengthened by the thickness of the chamber guide, due to the pressure that the raw material is injected into the nozzle Deformation (vulcanization or hardening, etc.) may occur.

As such, when the raw material is hardened before it is completely injected into the mold, it is impossible to completely mold it into a shape to be molded, and in particular, it causes the defect of the finished product by molding without the raw material in the mold. Is the biggest cause.

In addition, when the raw material is cured in the nozzle before the injection into the mold occurs clogging phenomenon occurs because the work must be carried out after removing the hardened portion by replacing or maintaining the nozzle during the operation, the overall workability is reduced.

In the prior art as described above, in the case of the fixed chamber, the thickness of the chamber guide is thick, and thus the problem of the raw material injection is frequently mentioned. In the case of the movable chamber, the thickness of the chamber guide is reduced to some extent. Since the length of the nozzle is not substantially reduced, the hardening of the raw materials is not completely eliminated.

In addition, since the total height of the entire injection molding apparatus is increased by having more chamber guides, there is a considerable difficulty in installation and a rise in overall manufacturing cost.

In addition, since the lower part of the upper mold is always covered by the chamber guide and the chamber connected to the outside of the chamber guide, various problems occur such that it is not easy to maintain or replace a mold or a nozzle. .

Therefore, in the present invention, as the invention to solve the problems as described above, the lower frame is maintained by the guide erected on the main frame, the lower frame is raised and lowered by the piston, and the upper mold and the raw material supply to the top of the guide Rubber product vacuum injection molding apparatus including an extrudate for forming, an upper frame installed with nozzles and pushers for injecting raw materials into upper and lower molds, and a vacuum chamber for maintaining the upper and lower molds in a vacuum state To;

The vacuum chamber includes a chamber flange formed to protrude integrally at the lower edge of the upper frame, a chamber body having upper and lower parts open to the outside of the chamber flange, and a lower plate forming and fixing a mold hole at the bottom of the chamber body. And a chamber cylinder installed on the upper surface of the upper frame to connect both sides of the lower plate to move up and down, and an airtight member interposed between the outer surface of the chamber flange and the inner surface of the chamber body and the lower surface of the lower plate and the upper surface of the lower frame. Characterized in that the configuration, while having a vacuum device can significantly reduce the nozzle length to prevent deformation of the raw material to be injected to increase the formability and provide ease of maintenance and mold replacement.

In the present invention, by removing the chamber guide between the upper frame and the upper mold and maintaining the vacuum chamber on the upper frame to maintain the upper and lower molds in a vacuum while raising and lowering, the length of the nozzle can be greatly increased while enabling vacuum injection molding. By preventing the deformation of the raw material is reduced by injection molding to increase the injection molding quality can be improved.

In addition, in the present invention, by removing the chamber guide can reduce the height of the entire injection molding apparatus while providing ease of installation, it is possible to secure an external competitiveness through the production cost of the injection molding apparatus.

In addition, the injection molding apparatus of the present invention is an invention having various effects such that the entire upper mold is exposed when the vacuum chamber is lifted up, and thus, workability for maintenance, replacement, etc. is excellent.

Hereinafter, with reference to the accompanying drawings will be described a preferred configuration and operation of the present invention for achieving the above object.

1 is an overall perspective view showing a rubber product vacuum injection molding apparatus to which the technique of the present invention is applied, FIG. 2 is a plan view showing a rubber product vacuum injection molding apparatus to which the technique of the present invention is applied, and FIG. 3 is a technique of the present invention. 4 is a cross-sectional view taken along the line A-A of the rubber product vacuum injection molding apparatus to which the applied rubber product is applied.

The general rubber product vacuum injection molding apparatus 100 is maintained by the guide 102 standing on the main frame 101, which is lifted up and down by the piston 103, and the lower frame 105 having the lower mold 104 installed therein is installed. .

The upper end of the guide 102 has an upper mold 106 at the lower end, an upper portion 107 for supplying the raw material and a nozzle 108 and a pusher for injecting the raw material into the upper and lower molds 104 and 106. An upper frame 110 having 109 is installed and configured.

In the present invention, a vacuum chamber 115 for maintaining the upper and lower molds 104 and 106 in a vacuum state is provided outside the upper frame 110 without a chamber guide, thereby greatly reducing the length of the nozzle 108 and raising the upper mold. (106) is characterized in that the complete exposure to excellent maintainability.

The vacuum chamber 115 is formed by integrally protruding the chamber flange 116 on the lower edge of the upper frame 110, the cross-sectional shape of the upper and lower open the outer side of the chamber flange 116 is a substantially rectangular chamber A body 117 is provided.

A lower plate 119 is formed at the bottom of the chamber body 117 to form a mold hole 118 through which upper and lower molds 104 and 106 can sufficiently pass, and an upper frame 110 on both sides of the lower plate 119. It is connected to the chamber cylinder 120 is installed on the upper surface of the upper and lower so that it can be lifted.

The outer surface of the chamber flange 116, the inner surface of the chamber body 117, the bottom surface of the lower plate 119 and the upper surface of the lower frame 105 is airtight for maintaining a vacuum state through the airtight member 122 It will be natural to be able to maintain.

The operation of the vacuum injection molding apparatus 100 having the vacuum chamber 115 to which the technique of the present invention is applied as described above is as follows.

During injection molding, the raw material is temporarily stored in the upper portion of the nozzle 108 through the extrudate 107, and the lower mold 104 is raised by the piston 103 to be connected with the upper mold 106. The vacuum chamber 115 is lowered to maintain the vacuum around the upper and lower molds 104 and 106.

Then, the raw material is injected into the upper and lower molds 104 and 106 by the pusher 109 and molded, and when the molding is completed, the vacuum chamber 115 is raised again and the lower mold 104 is lowered. It is in the standby state for the next operation, and the product is repeatedly injection molded.

In particular, in the present invention, since the vacuum chamber 115 is installed outside the upper frame 110 and moves up and down, the separate chamber guide for maintaining the vacuum chamber 115 is not necessary. As a result, the length of the nozzle 108 can be greatly reduced, thereby reducing the transport distance of the raw material, thereby preventing a phenomenon such as deformation in the process of transferring the raw material.

In this way, the raw material for molding can be injected quickly without deformation, which can maintain the quality uniformly while improving the quality of the molded product, and prevents the raw material from sticking to the inner circumference of the nozzle for efficient injection molding work. This can be done.

In addition, since the upper mold 106 is visually completely exposed when the vacuum chamber 115 is raised, there is no interference of the vacuum chamber 115 in performing maintenance or replacement of the upper mold 106. The ease of operation can be provided.

1 is an overall perspective view showing a rubber product vacuum injection molding apparatus to which the technique of the present invention is applied.

Figure 2 is a plan view showing a rubber product vacuum injection molding apparatus to which the technique of the present invention is applied.

Figure 3 is a cross-sectional view taken along the line A-A of a vacuum injection molding machine of the rubber product applied technology of the present invention.

Figure 4 is a cross-sectional view taken along the line B-B of the rubber product vacuum injection molding apparatus to which the technique of the present invention is applied.

Figure 5 (a, b) is a block diagram showing a vacuum box of a rubber product vacuum injection molding apparatus to which the prior art is applied.

* Description of the symbols used in the main parts of the drawings *

100; Vacuum Injection Molding Device

106; Upper mold

110; Upper frame

115; Vacuum chamber

117; chamber

Claims (1)

A lower frame 105 which is held by the guide 102 standing on the main frame 101 and is lifted and lowered by the piston 103 and placed in the lower mold 104; An upper mold 106, an extrudate 107 for supplying the raw material, a nozzle 108 and a pusher 109 for injecting the raw materials into the upper and lower molds 104 and 106 at the upper end of the guide 102. An upper frame 110 installed with; A rubber product vacuum injection molding apparatus (100) comprising a vacuum chamber (115) for maintaining the upper and lower molds (104, 106) in a vacuum state; The vacuum chamber 115 has a chamber flange (116) formed to protrude integrally to the lower edge of the upper frame (110); A chamber body 117 having upper and lower portions open to the outside of the chamber flange 116; A lower plate 119 for forming and fixing a mold hole 118 at the bottom of the chamber body 117; A chamber cylinder 120 installed on an upper surface of the upper frame 110 to connect both sides of the lower plate 119 to move up and down; Rubber product, characterized in that it comprises an airtight member 122 interposed on the outer surface of the chamber flange 116, the inner surface of the chamber body 117 and the bottom surface of the lower plate 119 and the upper surface of the lower frame 105. Vacuum injection molding device.

Images