KR20010113253A - Forming mold construction - Google Patents

Abstract

The object of the present invention is to enable the finished product 48 to be simply separated from the mold, thereby reducing productivity and improving productivity, while minimizing the loss of urethane foamed. It is possible to reduce this, and also to realize a structure in which the finished product is separated from the mold smoothly to prevent additional material costs.

The present invention for realizing this, the concave surface portion 34 formed in the upper front portion so that the handle core 44 can be located, and the injection hole to couple the injector 28 to one side of the concave surface portion 34 ( The lower mold 18 is formed to form one end of the lower end portion 36, and the lower surface portion 18 is formed to be in close contact with the upper surface of the lower mold 18 while facing the concave portion 34. The top mold 16 formed on the lower front portion is configured, and the mushroom groove 40 is formed at one side of the concave portion 34, and the same as the mushroom groove 40 at one side of the convex portion 42. It relates to a molding mold structure in which a mushroom groove 46 having the same shape at a position is formed.

Description

FORMING MOLD CONSTRUCTION

The present invention relates to a mold structure for an automobile handle forming apparatus, and in particular, by allowing the finished product to be easily separated from the mold, the productivity can be further improved with shortening of the work process, and also by minimizing the loss of urethane foamed. The present invention relates to a molding mold structure in which cost cost can be reduced.

In general, the product to be molded in the molding mold can be used by applying a variety of products, where the product used in the automotive will be described as follows. The steering wheel used in the vehicle uses urethane foam foamed mostly in the insert structure with respect to safety.

When the urethane resin solution is injected into the mold in order to mold the urethane foam, the urethane resin itself tries to be discharged to the outside of the mold together with the gas by causing a foaming reaction. Me and mushroom form. Such mushrooms usually occur in the process of forming a product.

Referring to FIG. 5, a lower mold 102 having a predetermined width and height is configured according to characteristics of a product, and a handle core 104 to be molded is installed on an upper front surface of the lower mold 102. A concave surface 106 is formed, and an inlet 108 for guiding urethane may be connected to one side end of the concave surface 106, and an injector for injecting urethane into the inlet 108. 109 is installed.

In addition, a top mold 110 is installed on the lower mold 102 to cover and seal the upper surface of the concave surface 106. The upper surface of the lower mold 102 has a shape opposite to the concave surface 106. The convex surface 114 is formed, and the vent surface 114 is formed to vertically penetrate the convex surface 114 so that the gas generated while urethane is foamed and the air remaining therein can be exhausted to the outside together. do.

Unexplained code 116: space part

Referring to the operation of the conventional technology configured as described above is as follows.

First, the injector 109 is positioned at the injection hole 108 of the lower mold 102, and the handle core 104 to be molded is positioned at the space part 116.

When the top mold 110 is seated on the lower mold 102 and the urethane in the liquid state is supplied to the injection hole 108 through the injector 109, the urethane flows into the space part 116 while the handle core is introduced. Formed at 104.

At this time, the urethane supplied is introduced into the air while exhausting the air remaining in the space portion 116 to the outside through the vent 114, and at the same time causing the foaming reaction when the urethane is formed on the handle core 104 Gas is generated, which is exhausted to the outside through the vent (114).

Subsequently, when the proper amount of urethane supply is completed, a portion of the foamed urethane is in the form of a mushroom on the top mold 110 through the vent 114, wherein the mushroom is gradually hardened and stays in a certain form. .

When the molding operation is completed as described above, in order to withdraw the finished product, the mushroom which protrudes on the top mold 110 is removed using a tool provided by a worker, and the top mold 110 is lowered. Separate from mold 102.

At this time, the finished product is a part of the urethane foam remains in the vent 114, the handle core 104 is raised together in combination with the top mold 110, thereby the handle core 104 Is separated from the space formed in the lower mold (102).

When the worker pulls the handle core 104 by hand in the state in which the separating operation is completed as described above, the urethane foam in the vent 114 is separated from the top mold 110 while being separated together with the handle core 104. do.

When the operation is completed, the operator applies a release agent to the top mold 110 and the lower mold 102 so that the products can be separated from each other, and the top mold 110 and the lower mold 102 are mutually coupled to each other. After that, the same operation is repeatedly performed as described above.

In the prior art described above, when the finished product is to be separated from the top mold, there is a problem in that productivity increases due to an increase in the work process since the worker must first remove the mushroom that protrudes onto the top mold.

Another problem is that the foaming agent flows out through the vent, which leads to cost loss due to the loss of materials, and the release of the release agent to the mold so that the product can be separated more. Together, the cost of materials increases.

It is an object of the present invention to enable the finished product to be simply separated from the mold, thereby allowing productivity to be further improved with shortening of the work process.

Another purpose is to minimize the loss of urethane foaming to reduce the cost, and also to prevent the additional material cost to be realized by realizing a structure in which the finished product is separated from the mold smoothly.

The present invention for realizing this comprises a concave surface portion formed in the upper front portion so that the handle core can be located, and a lower mold having an injection hole formed on one side end portion to couple the injector to one side of the concave surface portion, The top mold is formed to be in close contact with the upper front of the lower mold and the concave portion having a shape opposed to the concave portion is formed on the lower front portion, wherein a mushroom groove is connected to one side of the concave portion, The mushroom groove having the same shape as the mushroom groove is formed at one side of the portion.

1 is a state in which an embodiment of the present invention is installed in the molding apparatus.

Figure 2 is a cross-sectional view of the mold of the present invention.

Figure 3 is a perspective view of the lower mold of the present invention.

4 is a perspective view of a finished product according to the present invention;

5 is a cross-sectional view of a mold in the prior art embodiment.

<Explanation of symbols for the main parts of the drawings>

2: base 4: bed 6: hinge pin

8: top plate 10: hinge pin 12: hook

14: Push pin 16: Top mold 18: Lower mold

20,24: Load 22, 26: Cylinder 28: Injector

30: pump 32: raw material tank 34: concave portion

36: inlet 38, 44: guide groove 40: mushroom home

42: iron surface portion 46: space portion

1, the base 2 is configured as shown in FIG. 1, and one side of the bed 4 is coupled to the hinge pin 6 at the upper end of the base 2 so as to be rotated, and the bed 4 is rotated. The lug 5 and the column 6 are vertically installed at one side and the other side, and the top plate 8 is coupled to the hinge pin 10 at the upper end of the column 6 so as to be rotatable.

In addition, a hook 12 is vertically installed at the distal end of the top plate 10, and a fixing pin 14 is fixed to the distal end of the hook 12 so as to be coupled to or separated from the upper end of the lug 5. ) Is combined.

In addition, the top mold 16 is fixedly installed on the bottom of the top plate 8, and a pair of lower molds 18 are detachably installed on the lower front surface of the top mold 16. At the rear of the lower mold 18, a cylinder 22 coupled with a tip of a rod 20 that transmits an action force to move up and down is located, and the rear end of the cylinder 22 is fixed to the base 2.

At the rear end of the top plate 8, a cylinder 26 coupled to the front end of the rod 24 for transmitting an acting force to rotate about the hinge pin 10 is installed at the other end of the bed 4.

In addition, an injector 28 for spraying urethane is installed at the other end of the lower mold 18, and the pump 30 is connected to the injector 28 so that urethane can be injected at a high pressure. The raw material tank 32 filled with urethane in the liquid state is connected.

Meanwhile, the structure of the top mold 16 and the lower mold 18 will be described with reference to FIGS. 2 and 3 as follows.

First, a concave surface portion 34 is formed on the front surface of the lower mold 18 in a shape to shape a product, and the urethane is introduced to the other side of the concave portion 34 while the distal end portion of the injector 28 is coupled thereto. The injection hole 36 is connected, and the injection hole 36 extends to the other end of the lower mold 18.

In addition, a plurality of guide grooves 38 for guiding a portion of the urethane to flow out to the outside of the concave portion 34 is radially connected to each other, and the urethane is discharged to the tip of each of the guide grooves 38. The mushroom groove 40 is connected to be gathered.

At this time, the size of the mushroom groove 40 is usually determined by calculating the average amount of foaming and foaming while supplying an appropriate amount of urethane.

In addition, an upper surface of the top mold 16 is formed on the front surface of the lower mold 18, the concave surface portion 42 is formed to face the concave surface portion 34, the outer surface of the lower mold 18 The guide grooves 38 and the mushroom grooves 46 are formed in the same manner as the guide grooves 38 and the mushroom grooves 40 are located opposite to each other.

Unexplained code: 44: handle core, 46: space part, 48: finished product, 50: mushroom

Referring to the operation of the present invention configured as described above are as follows.

First, when the cylinder 26 is operated by manipulating a control unit (not shown) to mold the product, the rod 24 moves backward and rotates the top mold 16 while rotating the top plate 8 around the hinge pin 10. It is spaced apart from the lower mold 18.

When the operation is completed as described above, the handle core 44 is positioned on the concave portion 34 of the lower mold 18, and then the control unit is operated again to operate the cylinder 26 in contrary to the above. (8) is returned to its original position while rotating about the hinge pin (10).

As a result, the lower front surface of the top mold 16 is in close contact with the upper front portion of the lower mold 18. In this case, a fine gap is formed between the top mold 16 and the lower mold 18 so that the space portion ( 46 is in the same state as the atmosphere.

Subsequently, when the operator operates the control unit to operate the pump 30, the liquid urethane filled in the raw material tank 32 is injected through the injector 28.

The urethane sprayed as described above is introduced into the space portion 46 formed between the top mold 16 and the lower mold 18 through the injection hole 36 and foamed while generating a specific gas. Air remaining in the space 46 together with the gas is pushed out of the space 46.

At this time, the gas and the air are exhausted to the outside through a finely formed gap between the top mold 16 and the lower mold 18.

At the same time, the urethane introduced into the space 46 is formed in the handle core 44.

When the foaming is completed as described above, some of the urethane is discharged to the guide groove 38 and collected in the mushroom groove 40, wherein the air and gas remaining in the mushroom groove 40 are lower than the top mold 16 and the lower. It is exhausted to the outside through the gap formed between the mold 18.

As described above, the urethane introduced into the space portion 46 and the mushroom groove 40 is solidified after a predetermined time elapses, and when the work is completed, the worker completes the hook 1 and the lug 5. Remove the fixed pin 14 coupled to the control unit to operate the cylinder 26.

Therefore, while the rod 24 is retracted, the top plate 8 is rotated about the hinge pin 10 and the top mold 16 is separated from the lower mold 18.

In this case, the finished product 48 remains on the lower mold 18 and is separated from the top mold 16. As a result, the upper part of the finished product 48 is exposed to the outside.

When the worker pulls the finished product 48 by hand in the above state, it is separated from the concave portion 34 and at the same time, the mushroom 50 formed integrally with the outside of the finished product 48 is separated from the mushroom groove 40 together. While having a shape as shown in FIG.

The present invention has a structure that can be easily separated from the mold by the structure, there is an effect that can shorten the work process and improve productivity.

Another effect is that the cost of the urethane foam is minimized to reduce the cost, and also the structure that the finished product is separated from the mold smoothly has the advantage of preventing the addition of additional material costs. .

Claims (3)

In the lower mold 18 having the concave surface portion 34 formed thereon, and the top mold 16 having the convex surface portion 42 formed on the bottom surface while being located above the lower mold 18, Molding structure, characterized in that the mushroom groove (40) is connected to the lower mold (18) of one side of the concave surface (34). The method of claim 1, Molding structure, characterized in that formed in the groove groove 46 is connected to the inside of the top mold 16 on one side of the iron surface portion (42). In the lower mold 18 having the concave surface portion 34 formed thereon, and the top mold 16 having the convex surface portion 42 formed on the bottom surface while being located above the lower mold 18, Molding structure, characterized in that formed in the groove groove 46 is connected to the inside of the top mold 16 on one side of the iron surface portion (42).