KR102274849B1 - Assembling method for mold for injection molding - Google Patents

Abstract

The present invention relates to a method for assembling a mold for injection molding, and more specifically, to a method for assembling a mold for injection molding, wherein a plurality of blocks having coupling holes are fixed to a base frame, a cam is coupled to the holes formed in the blocks, and the coupled cam is inserted into the cavity of the mold to assemble the mold.

Description

Assembling method for mold for injection molding

The present invention relates to a method of assembling a mold for injection molding, and more particularly, fixing a plurality of blocks having coupling holes to a base frame, coupling a cam to a hole formed in the block, and inserting the coupled cam into a cavity of the mold It relates to a method of assembling a mold for injection molding, characterized in that by inserting it into the mold assembling the mold.

In general, injection molding uses a mold device equipped with one side mold in a fixed state having the shape to be molded and the other mold in a movable state having the shape to be molded to inject a plastic resin in the molten state to produce a product having a certain shape. refers to the molding process.

In such injection molding, the molten plastic resin is injected from the injector through the runner while the molds are in close contact with each other to mold the product at high temperature and high pressure, and then, while separating the movable other mold from the fixed one-side mold, This is done in the order of discharging the molded product to the outside of the mold device using an ejector.

However, in the injection molding process as described above, since the molds are subjected to high temperature and high pressure environments, there is a risk that the quality of the molded product may be deteriorated due to vibration or shaking according to the behavior of the mold. In order to solve this problem, the development of a new mold assembly method that can prevent vibration or shaking of the mold is required.

On the other hand, as a prior art related to the above-mentioned injection molding, the technology of manufacturing an interior panel for an interior material of a vehicle is known in Korean Patent Laid-Open No. 10-2011-43927.

The present invention has been devised to solve the problems of the related art as described above, and the technical problem of the present invention is to provide a method for assembling a mold for injection molding that can prevent vibration or shaking according to the behavior of the mold. .

In the method of assembling a mold for injection molding of the present invention for achieving the above technical problem, a plurality of blocks having coupling holes are fixed to a base frame, a cam is coupled to a hole formed in the block, and the coupled cam is molded into a mold. It is characterized in that the mold is assembled by inserting it into the cavity of

In the method of assembling a mold for injection molding of the present invention, which is configured as described above, the clamping force of the mold is improved by the cam assembled to the block, thereby preventing vibration and shaking according to the behavior of the mold, thereby improving the quality of the injection molded product. There is an effect that can make it happen.

In addition, since blocks can be freely arranged on the base frame according to the shapes of the core and the cavity of the mold to be assembled, the advantage that can be widely used in various types of molds is obtained.

1 is a view showing a base frame and a block used in the method of assembling a mold for injection molding of the present invention;
2 is a view showing a state in which the cam of the assembly method of the mold for injection molding of the present invention is coupled;
3 is a cross-sectional view showing a state in which a cam and a block are combined in a method of assembling a mold for injection molding of the present invention;
4 is a view showing a state in which a mold is mounted in the method of assembling a mold for injection molding of the present invention;
5 is a view showing an example of molds that can be applied to the method of assembling a mold for injection molding of the present invention;
6 and 7 are views showing an example of a mold assembled by the method of assembling a mold for injection molding of the present invention and a product molded by the mold;
8 is a flowchart of a method for assembling a mold according to the present invention.
9 is a view for explaining an additional embodiment of the present invention.
FIG. 10 is a plan sectional view of A in FIG. 9 .

The present invention is intended to be described in detail in the text of the embodiment (態樣, aspect) (or embodiments) can be applied to various changes and can have various forms. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as comprises or consists of are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

~1~, ~2~, etc. described in the present specification will be referred to only to distinguish that they are different components, and are not limited to the order of manufacture, and their names in the detailed description and claims of the invention are may not match.

Throughout this specification, when a part is said to be "connected" with another part, it is not only "directly connected" or "directly connected to communicate", but also "indirectly connected" with another element interposed therebetween. It includes cases where it is "connected to" or "connected indirectly to communicate".

Hereinafter, a method of assembling a mold for injection molding of the present invention will be described with reference to the drawings.

1 is a view showing a base frame and a block used in a method of assembling a mold for injection molding of the present invention, FIG. 2 is a view showing a state in which a cam is coupled in a method of assembling a mold for injection molding of the present invention, FIG. 3 is a cross-sectional view showing a state in which a cam and a block are combined in the method of assembling a mold for injection molding of the present invention.

First, referring to FIG. 1 , the method of assembling a mold for injection molding of the present invention is an assembly method that improves the fixing force of the mold to be mounted on the mold apparatus to prevent vibration and shaking according to the behavior of the mold.

In detail, the mold assembly method of the present invention is characterized in that the base frame 10 is coupled so that the mold 100 can be firmly fixed to the lower surface 110 or the upper surface 120 of the mold 100. .

When the product shape is formed on the lower surface 110 of the mold 100 , the base frame 10 is coupled to the upper surface 120 side of the mold 100 , and the product shape is formed on the upper surface 110 of the mold 100 . It is coupled to the lower surface 110 side of the mold 100 .

The base frame 10 is a box shape in which the upper surface of the rectangular shape in which the wall 11 is formed at the edge portion is opened, and at least one or more blocks 20 are installed in the inner space of the wall 11 .

The block 20 has a hexahedral shape and is used for coupling the cam 30 to the upper side. A detailed configuration of the block 20 and the cam 30 will be described later.

The assembling of the mold using the base frame 10 of the present invention having the above configuration is to assemble the mold 100 on the flat surface plate 200 in consideration of the convenience of work and the balance control of the mold.

Next, referring to FIG. 2 , in the method of assembling a mold of the present invention, at least one block 10 is inserted into the inner space of the base frame 10 according to the shape of the mold 100 to be coupled to the base frame 10 . It has a process of coupling the cam 30 inserted into a cavity (empty space) divided according to the shape of the mold 100 on the upper side of the installed block 10 .

At this time, the base frame 10 has a partition wall 12 that properly partitions the internal space is formed, and at least one or more blocks 10 are formed between the partition walls 12 in the internal space of the base frame 10 . It is disposed in the space and is fixedly installed on the bottom surface of the base frame 10 . The block 10 and the bottom surface of the base frame 10 may be fixed using a common screw.

In addition, since the block 10 can appropriately adjust the number of blocks on the base frame according to the shape of the core and the cavity of the mold to be assembled or freely arrange the blocks, various types of blocks can be formed. It can be widely used in molds.

As shown in FIG. 3 , the cam 30 includes a body 31 formed in a shape to mesh with the cavity shape of the mold 100 and a camshaft 32 formed to protrude downward from the lower portion of the body. is composed by

The block 20 is formed with a hole 21 having a predetermined diameter and depth from the upper surface toward the inside, and the cam shaft 32 of the cam 30 is inserted into the hole 21 of the block 20 while the cam ( 30 ) is combined with block 20 .

Alternatively, although not shown, a hole (not shown) having a predetermined diameter and depth is formed from the lower surface of the cam 30 toward the inside, and a cylindrical pin (not shown) is separately inserted into the hole. The cam 30 and the block 20 may be coupled by a method of inserting the block 20 into the hole 21 .

At least one cam 30 coupled to the block 20 as described above is installed according to the shape of the mold 100 and interpolated into a cavity (empty space) of the mold 100 to announce the mold 100 . It performs the function of fastening.

To this end, the shape of the body 31 of the cam 30 is made of a shape that meshes with the shape of the inner space of the cavity of the mold 100, or is at least interpolated into the cavity of the mold 100 and is in close contact with the inner surface. It is formed in a shape that can prevent the mold 100 from shaking or vibrating.

4 is a view showing a state in which a mold is mounted in the method of assembling a mold for injection molding of the present invention, a plurality of cams 30 coupled to a plurality of blocks 20 installed in the base frame 10 of the present invention. It is interpolated into the cavity of the mold 100 coupled to the upper side of the base frame 10 to show a state in which the mold 100 is coupled.

At this time, while inserting the cam 30 into the cavity of the mold 100, the mold 100, the base frame 10, and the block 20 are mutually coupled using a screw, and the mold 100 has The screw is inserted into the coupling hole (not shown) formed in the base frame 10 and the hole 21 of the block 20 to be coupled.

Therefore, in a state in which the mold 100, the base frame 10, and the block 20 are coupled, the cam 30 coupled to the block 20 is inserted into the cavity part, which is an empty space of the mold 100, while the mold ( 100) is firmly coupled on the base frame 10, and in this state, the cam 30 is interpolated into the cavity of the mold 100 to improve the fixing force of the mold 100, thereby increasing the mold behavior in the injection molding process. It prevents vibration and vibration.

5 is a view showing an example of molds that can be applied to the method of assembling a mold for injection molding of the present invention, in which a core 111 and a cavity 112 of a shape to be molded are formed to mold the upper surface of the product The mold 110 and the core 121 and the cavity 122 of the shape to be molded are formed to show the lower mold 120 for molding the lower surface of the product.

Therefore, the base frame 10 used in the assembly method of the present invention is respectively coupled to the upper mold 110 or the lower mold 120 as described above to improve the fixing force of the corresponding molds to prevent vibration and shaking during molding. It is possible to improve the yield and quality of

6 and 7 are views showing an example of a mold assembled by the method of assembling a mold for injection molding of the present invention and a product molded by the mold. The mold 100 for molding the product P is shown, and the core 101 part and the cavity 102 part for forming the shape of the product P are formed in the mold 100 .

At this time, the mold 100 is also mounted in a solid state on the mold device by the block 20 and the cam 30 disposed on the base frame 10 of the present invention, so that the mold 100 shakes and vibrates during injection molding. This is prevented, and FIG. 7 shows an interior material product P of a corresponding automobile pillar injection-molded using the mold 100 shown in FIG. 6 .

The method of assembling the mold of the present invention as described above will be described in a modified form with reference to the flowchart of FIG. 8 , and additional reference will be made to the aforementioned drawings.

1) Block arrangement step (S1)

In the block arrangement step (S1), at least one block 10 is fixed in accordance with the shape of the mold 100 in the inner space of the fixed base frame 10 and the base frame 10 is fixed on the surface plate 200. This is the stage of placement and installation.

At this time, the block 20 may be fixed to the bottom surface of the base frame 10 using a conventional screw, and the base frame 10 according to the shape of the core and cavity of the mold to be assembled. Install by adjusting the number of blocks or changing the arrangement of blocks.

2) Cam coupling step (S2)

The cam coupling step (S2) is a step of coupling at least one cam 30 interpolated into the cavity of the mold 100 on the upper side of the block 20 disposed on the base frame 10 as described above.

At this time, the cam 30 includes a body 31 having a shape to mesh with the cavity shape of the mold 100 and a camshaft 32 formed to protrude downwardly below the body, and the block (20) is formed with a hole 21 having a predetermined diameter and depth from the upper surface toward the inside, the cam shaft 32 of the cam 30 is interpolated into the hole 21 of the block 20, the cam 30 It will be coupled with this block (20).

The cam 30 coupled to the block 20 as described above is inserted into a cavity (empty space) of the mold 100 to perform a function of firmly fixing the mold 100 .

And, as described above, the shape of the body 31 of the cam 30 is made of a shape that meshes with the shape of the inner space of the cavity of the mold 100, or is at least interpolated into the cavity of the mold 100 to the inside It is preferable to have a shape that can prevent the mold 100 from shaking or vibrating by being in close contact with the surface.

3) Mold bonding step (S3)

In the mold coupling step (S3), the base frame 10 and the mold 100 are mutually coupled while interpolating the cam 30 coupled to the block 20 disposed on the base frame 10 into the cavity of the mold 100. It is a step to

At this time, the mold 100, the base frame 10, and the block 20 are mutually coupled using a screw, and a screw provided in the mold 100 is additionally coupled to the base frame 10 with a coupling hole (not shown). The mold 100 and the base frame 10 are coupled by interpolating into the hole 21 of the block 20 and the mold 100 .

Therefore, as described above, in the state where the mold 100, the base frame 10, and the block 20 are combined, the cam 30 additionally coupled to the block 20 is a cavity part that is an empty space of the mold 100. As the mold 100 is firmly coupled to the base frame 10 while being interpolated, the fixing force of the mold 100 is improved, thereby preventing vibration and shaking according to the behavior of the mold during the injection molding process.

9 and 10 , the cam coupling step (S2) is performed by a locking means (H3), and the locking means (H3) is a camshaft (32) protruding downward from the lower end of the body (31). And the block 20, the camshaft 32 from the upper end to the lower side so that the hole 21 is recessed may include a hole (21) formed.

As shown in [C] of FIG. 9 , in a state in which the camshaft 32 is inserted into the hole 21 , the body 31 is effectively coupled with limited horizontal movement.

In addition, the locking means (H3) includes a locking groove (H33) recessed in the horizontal direction in the hole (21), a vertical pipe (H341) recessed upward from the lower end of the camshaft (32), from the side of the camshaft (32) and a fluid pipe H34 including a horizontal pipe H342 which is recessed in a first direction among horizontal directions and communicates with the vertical pipe H341. The first direction may be a direction opposite to a second direction d2 described later in FIG. 10 .

In addition, the locking means (H3) may include a first piston (H35) disposed inside the vertical pipe (H341) and a second piston (H37) disposed inside the horizontal pipe (H342). A fluid (eg, air, for example) may be accommodated in a space formed by the fluid pipe H34 , the first piston H35 , and the second piston H37 .

In addition, the locking means (H3) includes a pressing portion (H36) protruding downward from the lower end of the first piston (H35), and the second direction (d2) opposite to the first direction in the second piston (H37). ) may include a protrusion H381 protruding along the protrusion H381 and an inclined portion H382 protruding downward in the second direction d2 from the protrusion H381 and inserted into the locking groove H33.

In the state in [A] of FIG. 9 , the first piston H35 moves downward by its own weight, and the second piston H37 moves in the first direction by hydraulic pressure. At this time, when the body 31 moves downward and the camshaft 32 is inserted into the hole 21 as shown in [C] of FIG. 9 , the pressing part H36 is pressed to the bottom of the hole 21 and the first piston ( H35) moves upward in the vertical pipe H341, and the second piston H37 moves in the second direction d2 by the hydraulic pressure of the fluid pipe H34, so that at least a portion of the locking part H38 is It is inserted into the locking groove (H33).

Through this, the body 31 is coupled with the block 20 only through the force that moves downward, and the horizontal movement of the body 31 with respect to the block 20 by the camshaft 32 and the hole 21 is At the same time limited, at least a portion of the engaging portion (H38) is inserted into the engaging groove (H33), the vertical movement of the body (31) with respect to the block (20) is limited. That is, although the body 31 has only moved downward, it is coupled such that horizontal movement and vertical movement with respect to the block 20 are limited.

As described above, it is said that the locking portion H38 includes the inclined portion H382, which protrudes in the second direction d2 (left direction in FIG. 9) when viewed from the front cross-section (see FIG. 9) and is inclined downward. Through this, as shown in [B] of FIG. 9 , the pressing part H36 is slightly pressed by the bottom of the hole 21 (a part of the hole 21 in a state where the camshaft 32 does not touch the bottom of the hole 21 ) is inserted), even when the engaging portion H38 moves a predetermined distance in the second direction d2, friction between the inclined portion H382 and the hole 21 is minimized, so that the camshaft 32 can move downward more easily. There is an advantage that there is

Referring to FIG. 10 , the inclined portion H382 includes an inclined surface H382a inclined with respect to the second direction d2 when viewed from the top (see FIG. 9 from the upper side), and the engaging groove H33 is In a state in which the locking portion H38 and the locking groove H33 are fully engaged, a pressing piece H331 protruding from one side in a direction normal to the inclined surface H382a may be included.

Through this, when the body 31 is rotated in the vertical direction as the central axis, the inclined portion H382 also rotates in the vertical direction as the central axis. For example, the inclined portion H382 is rotated in the clockwise direction with reference to FIG. 10 . As it rotates, it is pressed by the pressing piece H331 to move in the first direction, and the first piston H35 moves downward by the hydraulic pressure of the fluid pipe H34 to push the bottom of the hole 21, and the body 31 may move upward to release the coupling with the block 20 . This has the advantage that the block 20 and the cam 30 can be easily reused.

The present invention described above with reference to the accompanying drawings is capable of various modifications and changes by those skilled in the art, and such modifications and changes should be construed as being included in the scope of the present invention.

* Explanation of symbols for the main parts of the drawing *
10; base frame
11; wall
12; partition wall
20; block
21; hall
30; cam
31; body
32; camshaft
100; mold
101; core
102; cavity
110; prize money
111; core
112; cavity
120; lower mold
121; core
122; cavity
200; platen

Claims (4)

In the assembly method of a mold for injection molding,
A block arrangement step (S1) of fixing the base frame 10 on the surface plate 200 and arranging at least one or more blocks 20 according to the shape of the mold 100 in the inner space of the fixed base frame 10;
a cam coupling step (S2) of coupling at least one cam 30 interpolated into the cavity of the mold 100 on the upper side of the block 20 disposed on the base frame 10;
A mold coupling step (S3) of interposing the cam 30 coupled to the block 20 disposed on the base frame 10 into the cavity of the mold 100 and coupling the base frame 10 and the mold 100 to each other;
consists of,
Injection molding, characterized in that the block 20 is installed by adjusting the number of blocks or changing the arrangement of the blocks on the base frame 10 according to the shape of the core and cavity of the mold to be assembled Mold assembly method for delete The method of claim 1,
The cam 30 is configured to include a body 31 having a shape that meshes with the cavity shape of the mold 100 and a camshaft 32 formed to protrude downwardly under the body,
The block 20 is formed with a hole 21 having a predetermined diameter and depth from the upper surface toward the inside,
Method of assembling a mold for injection molding, characterized in that the cam (30) is coupled to the block (20) while the camshaft (32) of the cam (30) is inserted into the hole (21) of the block (20). 4. The method according to claim 3,
The cam coupling step (S2) is performed by a locking means (H3),
The locking means (H3) is a locking groove recessed in the horizontal direction in the hole 21, a vertical pipe recessed upward from the lower end of the camshaft 32, and a horizontal direction recessed in the first direction from the side of the camshaft. a fluid pipe including a horizontal pipe communicating with the vertical pipe, a first piston disposed inside the vertical pipe, a pressing part protruding downward from the lower end of the first piston, a second pipe disposed inside the horizontal pipe 2 pistons, a locking part including a protrusion protruding from the second piston in a second direction opposite to the first direction, and an inclined part protruding from the protrusion in the second direction to be inclined downward from the protrusion and inserted into the locking groove and,
The inclined portion includes an inclined surface inclined with respect to the second direction when viewed in a plan view, and the locking groove is provided protruding along a normal line direction of the inclined surface from one side in a state in which the locking part and the locking groove are fully caught. A method of assembling a mold, characterized in that it includes a piece.

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