KR100290682B1 - Vacuum injection molding machine for liquid materials - Google Patents

Abstract

The present invention relates to a liquid-liquid vacuum injection molding machine for injection molding a liquid material, and in the related art, the fixed mold and the moving mold move vertically, and the core moves and moves the mold horizontally so that the core is coupled and separated. There is a problem that the molding work of the required shape is difficult because the deflection error due to the weight, etc. and the unfilling or air bleeding of the liquid material in the mold is not effective, and the work for attaching and detaching the mold is inconvenient.

In order to solve the problems of the prior art, the present invention is the fixed mold, the moving mold is operated in a horizontal state and the operation of the core by the operation of the core to be coupled and separated while lifting and lowering operation in the vertical upper portion of the mold operation To prevent the error, and also to inject the injection nozzle from the lower part of the mold to effectively fill the liquid material into the mold as well as the effective air bleeding provides excellent formability to the required shape of the molded article, and also As the mounting table on the movable plate rotates forward, the movable mold can be easily installed and separated, thereby providing excellent workability.

Description

Liquid Vacuum Injection Molding Machine {VACUUM INJECTION MOLDING MACHINE FOR LIQUID MATERIALS}

The present invention relates to an injection molding machine for molding a liquid material (ultra high molecular weight, polyethylene, etc.) in a vacuum state, and more specifically, to fix and mold a fixed mold and a moving mold in a horizontal state, and the core of the mold. Since the nozzle at the top to move up and down at the bottom relates to a liquid vacuum injection molding machine that is excellent in formability with excellent effects of liquid material filling and outgassing of the nozzle as well as preventing sagging of the core.

In general, the injection molding machine has a structure having a slight difference depending on the characteristics of the material.

In particular, in forming a liquid material, a vacuum chamber is provided to separate and discharge molding defects due to air bubbles introduced into the mold by air pressure in the atmosphere, and odors and harmful gases generated during molding operations. .

Referring to the liquid vacuum injection molding machine, the fixed mold and the moving mold are mounted on the fixed plate and the moving plate, respectively, on the upper and lower sides, and the movable plate is moved up and down to perform mold coupling and separation.

At this time, when the mold is combined, the outside of the mold is blocked by the vacuum chamber, the internal air is taken out to maintain a vacuum state, and then the injection molding process is performed by injecting a liquid raw material into the mold by the injection nozzle from the upper portion of the upper mold. Done.

In addition, when a separate core is installed between the stationary mold and the moving mold according to the shape of the molded article, the core is mold-coupled and separated while moving back and forth by a cylinder or the like on the sides of the stationary mold and the moving mold.

However, such a conventional molding machine causes sagging during forward and backward operation due to the weight of the core or the weight of the moving means, and when such deflection errors accumulate, it is difficult to form a regular mold with the mold, and thus the required shape of the molded article is required. There is a problem that is difficult to obtain.

In addition, since the liquid material is injected from the upper portion of the upper mold, the liquid material may not be sufficiently supplied into the mold, or gas may not be sufficiently discharged from the mold, thereby causing molding failure.

In addition, the molding machine is limited in securing a space between the fixed plate and the movable plate, and the work of mounting the mold is made only between the fixed plate and the movable plate, so that the workability is very inconvenient.

The present invention was created to fundamentally solve all the problems of the prior art, and prevents the deflection of the core during mold coupling and separation operation of the fixed mold and the moving mold, and the effective filling of the liquid material in the mold And it is the purpose to provide excellent molding workability to produce a molded article of the shape required by effective air bleeding.

In addition, the present invention is to provide a workability is excellent because it makes it easy to install and remove the mold.

The object of the present invention is to install the fixed mold and the movable plate and the fixed plate and the movable plate horizontally opposite to the front and rear operation while the core moving unit equipped with the core while the lifting and lowering operation at the top of the mold To be separated,

The injection nozzle moving part equipped with the injection nozzle is used to raise and lower the mold at the bottom of the mold to injection-inject the liquid material.

In addition, the mounting table on which the movable mold is installed is achieved by mounting the mold while rotating outwardly on the movable plate.

1 is a side configuration view showing a mold open state of the present invention;

Figure 2 is a side view showing a mold coupled state of the present invention,

3 is a plan view showing a type coupled state of the present invention,

4 and 5 is an enlarged view of the main portion showing the mold inversion operation of the present invention,

4 is a state before inversion,

5 is a state after inversion.

<Explanation of symbols for main parts of drawing>

5; Expectation 8; Guide rail 10; Fixed Plate

12,22; Mounting bracket 15,25; Vacuum chamber 20; Moving plate

23; Plate 28; Guide rolls 31,32; Guide

33; Inverted cylinder 35; Axis of rotation 40; Core moving part

50; Nozzle moving part 53; Injection nozzle

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

That is, the present invention, as shown in Figures 1 to 5, the fixed mold (A) and the mounting mold (12) to which the mounting mold (B) is mounted in a vertically opposite state, but fixed to the fixed plate 10 In the liquid phase vacuum injection molding machine comprising a moving plate 20, a core, a vacuum chamber, and an injection nozzle 53 for injecting a liquid material, for vertical coupling operation and mold separation and separation.

The fixed plate 10 and the movable plate 20 are horizontally opposed to each other, and the movable plate 20 is inserted into the horizontal guide holes 31 and 32 of the upper and lower parts and guided horizontally, and guide rolls on both lower sides thereof. (28) is installed so that the guide roll 28 is horizontally guided along the guide rail 8 installed on the base 5, and moves forward and backward,

One side of the upper and lower horizontal guide spheres 31 and 32 moves forward and backward along the horizontal guide spheres 31 and 32 by the front and rear operation cylinders 41 and 51, and the elevating cylinders 42 and 52. It is made by installing the core moving part 40, the core is mounted on the upper portion and the nozzle moving part 50, the injection nozzle 53 is mounted on the lower portion so as to move up and down by the mold position.

At this time, the fixing plate 10 and the moving plate 20 are provided with vacuum chambers 15 and 25 which are moved back and forth by the chamber moving cylinders 16 and 26, respectively, inwardly.

In addition, the movable plate 20 is pivotally connected to one side plate 23 and the pivot shaft 35 of the movable side mounting table 22 on one side, and the reverse cylinder 33 is hinged to the other side (33a) The tip of the rod 34 of the reversing cylinder 33 is rotatably installed and rotatably connected to the other side of the plate 23 and the hinge 34a to extend the rod 34 of the reversing cylinder 33. As the contraction occurs, the mounting table 22 along with the plate 23 rotates about the rotation shaft 35.

At this time, the plate 23 on the movable side mounting table 22 is provided with an operating cylinder 36 on the upper side, and the movable side mounting table 22 is fixedly installed at the rod end of the operating cylinder 36 to operate the operating cylinder 36. By the mounting bracket 23 is moved back and forth along the guide rod 37.

As an unexplained hole, 7 is a plate moving cylinder, 9 is a support plate for supporting the other side of the horizontal guide sphere 31, 32, the other side is supported on the fixed plate 10, 11, 21 is the mounting table 12 (22) It shows the heating plate installed in each).

Next will be described the operation and action of the present invention configured as described above.

First, when mounting the mold (A) (B) in the liquid vacuum injection molding machine of the present invention by operating the plate moving cylinder (7) to move the movable plate 20 to the outside outwards the movable plate 20 and the fixed plate The distance between the (10) is maximized to secure sufficient working space.

In this state, the stationary mold A is mounted on the mounting table 12 on the stationary plate 10.

After mounting the fixed mold (A) in this way, when the distance to the moving plate 20 does not secure a sufficient working space, that is, when the mold is relatively large, the movable side mounting table 22 is rotated outward.

At this time, even if a certain amount of work space is secured, the mold may be mounted by rotating the movable side mounting table 22 to facilitate the mounting of the mold.

In more detail, when the inversion cylinder 33 coupled to the hinge 23a on the outside of the movable plate 20 is extended, the rod 34 at its tip is extended to the hinge 34a on the rod 34. The plate 23 of the movable moving side mount 22 is advanced.

At this time, since one side of the plate 23 is coupled to the moving plate 20 and the rotation shaft 35, the plate 23 rotates outward from the rotation shaft 35, and at the same time, the inversion cylinder 33 ) Rotates the movable side mount 22 continuously outward while rotating about the hinge 33a.

In this way, since the movable side mounting table 22 is rotated to the front position of the worker, the worker easily mounts the movable mold B using a forklift or the like.

This is performed in the same manner when removing the moving mold (B).

After mounting the movable mold B on the movable side mount 22 in this way, the movable side mount 22 is retracted by rotating the rod 34 of the reverse cylinder 33 in the inverse of the above-described operation. Rotate around to return to the original position.

In addition, the core moving part 40 and the nozzle moving part 50 are equipped with a core and an injection nozzle 53, respectively.

In this way, after the preparation for molding is completed, the front and rear operation cylinder 41 is operated to move and control the nose movement part 40 back and forth, and the core of the tip is moved to a predetermined position in front of the stationary mold A by the elevating operation cylinder 42. It is located.

At this time, since the core of the core moving part 40 moves vertically, the deflection deformation is prevented, so that the core of the core moving part 40 can be installed at an accurate and constant position.

In this state, the plate moving cylinder 7 is operated to move the moving plate 20 to move the moving mold B to the front of the fixed mold A.

At this time, the movable plate 20 is guided by the upper and lower guide spheres 31 and 32, and at the same time the guide rolls 28 of the lower both sides are guided along the guide rail 8, so that the upper and lower guide spheres by the load A constant and accurate movement is provided while preventing deformation of (31) and (32).

When the movement of the movement mold B is completed in this way, the nozzle moving part 50 is moved by the front and rear operation cylinder 51 and the raising and lowering operation cylinder 52 to be in close contact with the mold.

In such a state, the chamber moving cylinders 16 and 26 advance and closely contact the fixed chamber 10 and the vacuum chambers 15 and 25 installed on the movable plate 20, and the air therein is vacuumed. The pump is pulled out to maintain vacuum.

At this time, as described above, forming the vacuum state before the injection operation is intended to minimize the defect of the product by eliminating the part of the product which is unmolded by the air remaining in the mold, and by the injection molding itself in a vacuum state.

In this way, when the interior of the vacuum chamber (15, 25) is in a complete vacuum state, the operating cylinder 36 provided on the plate 23 of the movable side mounting table 22 is operated to mount the mounting plate 22 to the guide rod 37. After moving back and forth along), the moving mold (B) is brought into close contact with the mold in the correct position.

In this state, the liquid material is injected into the molds (A) and (B) through the injection nozzle 53 to perform a molding operation.

At this time, since the injection nozzle 53 injects the liquid material from the lower part of the mold, the liquid material is filled while being pushed up from the lower part to the upper part, so that the filling of the liquid material is excellent. It is excellent in formability because it is.

When the molding operation is completed in this manner, the vacuum chambers 15 and 25 are returned to their original positions by the chamber operation cylinders 16 and 26, and the moving side mounting table 22 is returned to its original position by the operation cylinders 36. The moving plate 20 is returned to its original position by the plate actuating cylinder 7.

In addition, the core moving part 40 and the nozzle moving part 50 raise and lower the core and the injection nozzle 53 by the lifting cylinders 42 and 52 to wait for the next operation.

In this way it is obtained by ejecting the molded product inside the mold.

As described above, the present invention allows the fixed mold and the movable mold to operate in a horizontal state, while the core operation prevents the operation error due to the deflection of the core by forming and separating the core while the elevating operation is performed in the vertical upper portion of the mold. In addition, since the injection nozzle is injected from the lower part of the mold, the liquid material is effectively filled into the mold, as well as the air is effectively drained, thereby providing excellent moldability to the required shape of the molded article.

In addition, it is possible to simply install and remove the moving mold by rotating the mounting table on the moving plate forward to have an effect that is excellent in workability.

Claims (3)

Mounting mounts 12 and 22 on which the stationary mold A and the movable mold B are mounted are mounted in a vertically opposite state, but the movable plate 20 is vertically operated with the stationary fixed plate 10 so as to be coupled and separated. In the liquid vacuum injection molding machine comprising a core, a vacuum chamber, and an injection nozzle 53 for injecting a liquid material, The fixed plate 10 and the movable plate 20 are horizontally opposed to each other, and the movable plate 20 is inserted into the horizontal guide holes 31 and 32 of the upper and lower parts and guided horizontally, and guide rolls on both lower sides thereof. (28) is installed so that the guide roll 28 is horizontally guided along the guide rail 8 installed on the base 5, and moves forward and backward, One side of the upper and lower horizontal guide spheres 31 and 32 moves forward and backward along the horizontal guide spheres 31 and 32 by the front and rear operation cylinders 41 and 51, and the elevating cylinders 42 and 52. In order to move up and down to the mold position by the core moving part 40 is mounted to the core and the nozzle moving part 50 is mounted to the injection nozzle 53 is mounted on the lower liquid vacuum injection, characterized in that Molding machine. The method of claim 1, The movable plate 20 is pivotally operated by one side plate 23 and the rotation shaft 35 of the movable side mounting table 22 on one side, and the reverse cylinder 33 is rotated by the hinge 33a on the other side. In addition, the tip of the rod 34 of the inversion cylinder 33 is rotatably connected to the other side of the plate 23 and the hinge 34a so as to extend or contract the rod 34 of the inversion cylinder 33. Liquid phase vacuum injection molding machine, characterized in that the mounting plate 22 with the plate 23 is made to rotate around the rotation shaft 35. The method of claim 2, The plate 23 on the movable side mount 22 is provided with an operating cylinder 36 on the upper side, and the movable side mount 22 is fixed to the rod end of the operating cylinder 36 to fix the operating cylinder 36. Liquid-phase vacuum injection molding machine characterized in that the mounting table 23 is installed to move back and forth along the guide rod 37 by.