KR20080067746A - Injection molding apparatus - Google Patents

Abstract

An injection molding apparatus is provided to insert or eject upper and lower chases having upper and lower cores respectively in/from upper and lower plates using a sliding method so as to replace the cores easily to simplify a manufacturing process, and to reduce manufacturing costs. An injection molding apparatus comprises lower and upper fixed plates(10,60), lower and upper plates(20,70), lower and upper chases(40,80), lower and upper cores(50,90). The lower plate has a plurality of guide holes(21). A lower core mounted space is formed on the lower chase. The upper plate has a plurality of guide rods(71) inserted in the guide holes. An upper core mounted space is formed on the upper chase. The upper core is detached from the upper core mounted space. The upper chase is combined with the upper plate by more than two upper chase fixing units. The lower chase is combined with the lower plate by more than two lower chase fixing units.

Description

Injection Molding Equipment {INJECTION MOLDING APPARATUS}

1 is a perspective view of a two-stage injection molding apparatus according to the present invention,

2 is a perspective view of a three-stage injection molding apparatus according to the present invention,

3 is a cross-sectional view taken along the line A-A 'of FIG.

4 is a cross-sectional view taken along line B-B 'of FIG.

5A is an exploded perspective view of an upper chase and a lower chase,

5B is a rear perspective view of FIG. 5A,

6A is a plan view showing a form in which the lower chase is inserted into the lower plate;

6B is a plan view showing a form in which the lower die chase is drawn out to the lower die plate;

7 is a flowchart illustrating an injection process in the three-stage injection molding apparatus according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: lower plate fixing plate 11: lower plate fixing means

12: lower insulation board 20: lower insulation board

21: guide hole 22: lower chase guide

30: wheat plate 31: wheat pin

32: coupling means 33: elastic member

40: lower chase 41: lower chase handle

42: lower chase fixing means 43: insertion hole

44: elevator 45: core seating space

50: core 51: core fixing means

52: core injection groove 60: hieroglyphs

61: upper heat insulating plate 62: sprue

62-1: sprue bush 62-2: sprue fixing plate

62-3: sprue fixing means 62-5: sprue inlet

63: rocket ring 63-1: rocket ring fixing means

64: upper plate fixing means 69: fuller bolt

70: upper plate 71: guide rod

72: Pictograph Chase Guide 80: Pictograph Chase

81: Pictograph chase handle 82: Pictograph chase fixing means

83: insertion protrusion 84: hieroglyph chase inlet

85: upper core seating space 90: upper core

91: upper core fixing means 92: upper core inlet

93: upper core injection groove 94: injection space

99: lifting device 100: injection molding

The present invention relates to an injection molding apparatus, and in particular, the upper chase for seating the upper core and the lower chase for seating the lower core can be inserted or withdrawn from the side of the upper plate and the lower plate in a sliding manner. An injection molding apparatus capable of facilitating exchange of a lower core.

Injection molding generally refers to manufacturing various types of products by melting and filling a molding material such as a thermoplastic resin into a cavity of a product form formed in a mold, and then cooling and solidifying the same.

Here, the injection molding apparatus is a device for injection molding, sprue into which the molding material is introduced, an upper core and a lower core into which the injected molding material is injected, and an injection molded product, and an upper mold plate for seating the upper core. It includes a lower plate for seating the lower core.

Here, the upper core and the lower core is provided with a mold mold in the form of a product so that the molten resin is injected and the injection molded product is molded therein.

Therefore, such a conventional injection molding apparatus has to be replaced with a new type of upper core and lower core in order to mold another type of injection product after the production of the molded injection product is finished.

However, such a conventional injection molding apparatus has to disassemble existing upper and lower cores fixed to the upper and lower plates and assemble new upper and lower cores in order to replace the upper and lower cores. There was this.

That is, in order to disassemble the upper and lower cores, the upper and lower cores should be separated from each other, and then the upper and lower cores should be disassembled.

Therefore, such a conventional injection molding apparatus must separate the upper plate and the lower plate from each other in order to replace the upper core and the lower core, thereby producing time delay and process per unit product according to the exchange of the upper core and the lower core. There was a problem of increasing the cost.

Accordingly, an object of the present invention is to insert or withdraw the upper body chase on which the upper core is seated and the lower body chase on which the lower core is seated in a sliding manner from the side of the upper plate and the lower plate. The present invention provides an injection molding apparatus that facilitates exchange, thereby reducing manufacturing process and eliminating work.

The above object, according to the present invention, the lower mold fixing plate; A lower die plate coupled to an upper surface of the lower die plate and having a plurality of guide holes; A lower chase coupled to the lower plate and having a lower core seating space formed on an upper surface thereof; A lower core detachably seated in the lower core seating space; Pictograph fixing plate; An upper plate coupled to a lower surface of the upper plate fixing plate and having a plurality of guide rods inserted into the guide hole; An upper chase coupled with the upper plate and having an upper core seating space formed on a lower surface thereof; And an upper core detachably seated in the upper core seating space, wherein the upper body chase is inserted into the side of the upper plate in a sliding manner to be fixedly coupled to the upper plate by two or more upper body chase fixing means. The lower mold chase is achieved by an injection molding apparatus, which is inserted into the side of the lower mold plate in a sliding manner and fixedly coupled to the lower mold plate by two or more lower mold chase fixing means.

Preferably, the upper chase has two or more insertion protrusions are formed on the lower surface, the lower chase is formed with an insertion hole corresponding to the position of the insertion protrusion, the insertion protrusion is inserted into the insertion hole can be fixed fixed have.

In addition, the lower mold fixing plate is formed on the lower surface of the lower heat insulating plate for heat insulation, the upper fixing plate may be formed on the upper surface of the upper heat insulating plate for heat insulation.

Preferably, the lower mold chase is further included on the lower surface of the lower plate is coupled by a plurality of coupling means and flows up and down, wherein the lower plate, the injection molded from the lower mold core through the lower mold chase and the lower mold core It can include a plurality of pushpins that can be pushed up.

The lower chase and the upper chase may further include a lower chase handle and an upper chase handle for insertion or withdrawal from the lower plate and the upper plate.

On the other hand, according to the present invention, the lower mold fixing plate; A lower die plate coupled to an upper surface of the lower die plate and having a plurality of guide holes; A lower chase coupled to the lower plate and having a lower core seating space formed on an upper surface thereof; A lower core detachably seated in the lower core seating space; Pictograph fixing plate; Sprues coupled to the upper surface of the fixing plate; An upper plate formed on a lower surface of the upper plate fixing plate and coupled with a puller bolt to move upward and downward, and having a plurality of guide bars inserted into the guide hole; An upper chase coupled with the upper plate and having an upper core seating space formed on a lower surface thereof; And an upper core detachably seated in the upper core seating space, wherein the upper body chase is inserted into the side of the upper plate in a sliding manner to be fixedly coupled to the upper plate by two or more upper body chase fixing means. The lower mold chase is achieved by an injection molding apparatus, which is inserted into the side of the lower mold plate in a sliding manner and fixedly coupled to the lower mold plate by two or more lower mold chase fixing means.

Preferably, the upper chase has two or more insertion protrusions are formed on the lower surface, the lower chase is formed with an insertion hole corresponding to the position of the insertion protrusion, the insertion protrusion is inserted into the insertion hole can be fixed fixed have.

In addition, the lower mold fixing plate is formed on the lower surface of the lower heat insulating plate for heat insulation, the upper fixing plate may be formed on the upper surface of the upper heat insulating plate for heat insulation.

Preferably, the lower mold chase is further included on the lower surface of the lower plate is coupled by a plurality of coupling means and flows up and down, wherein the lower plate is injected through the lower mold chase and the lower mold core and injected from the lower mold core It may include a plurality of milpin to push up.

Here, the lower mold chase and the upper mold chase may further include a handle for inserting or withdrawing from the lower mold plate and the upper mold plate.

On the other hand, the sprue may be formed of a sprue bush to which the raw material of the injection is injected, and a sprue fixing plate for fixing the sprue bush to the upper plate fixing plate.

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

1 and 5, the injection molding apparatus according to the present invention, the lower mold fixing plate 10; A lower die plate 20 coupled to the upper surface of the lower die plate 10 and having a plurality of guide holes 21 formed therein; A lower chase 40 coupled to the lower plate 20 and having a lower core seating space 45 formed thereon; A lower core 50 detachably seated in the lower core seating space 45; Upper fixing plate (60); An upper plate 70 coupled to the lower surface of the upper plate fixing plate 60 and having a plurality of guide rods 71 inserted into the guide holes 21; An upper chase 80 coupled to the upper upper plate 70 and having an upper core seating space 85 formed on a lower surface thereof; And an upper core 90 detachably seated in the upper core seating space 85, wherein the upper body chase 80 is inserted into the side surface of the upper plate 70 in a sliding manner and two or more upper body chases. It is coupled to the upper plate 70 by a fixing means 82, the lower chase 40 is inserted into the side of the lower plate 20 in a sliding manner by the two or more lower chase fixing means 42 It is characterized by being fixed to the lower plate 20.

2, 4 and 5, another injection molding apparatus according to the present invention, the lower mold fixing plate 10; A lower die plate 20 coupled to the upper surface of the lower die plate 10 and having a plurality of guide holes 21 formed therein; A lower chase 40 coupled to the lower plate 20 and having a lower core seating space 45 formed thereon; A lower core 50 detachably seated in the lower core seating space 45; Upper fixing plate (60); A sprue 62 coupled to the bottom surface of the upper fixing plate 60; A top plate (70) formed with a plurality of guide rods (71) coupled to the lower surface of the upper plate fixing plate (60) by a puller bolt (69) and movable up and down and inserted into the guide hole (21); An upper chase 80 coupled to the upper upper plate 70 and having an upper core seating space 85 formed on a lower surface thereof; And an upper core 90 detachably seated in the upper core seating space 85, wherein the upper body chase 80 is inserted into the side surface of the upper plate 70 in a sliding manner and two or more upper body chases. It is coupled to the upper plate 70 by a fixing means 82, the lower chase 40 is inserted into the side of the lower plate 20 in a sliding manner by the two or more lower chase fixing means 42 It is characterized by being fixed to the lower plate 20.

Hereinafter, each configuration will be described in detail.

1 and 3, the injection molding apparatus according to the present invention, the upper plate 70 is fixed to the upper plate fixing plate 60 by the upper plate fixing means 64 to the lower plate 20 A two-stage injection molding apparatus in which the upper plate 70 and the upper plate fixing plate 60 are lifted up and down together, and as shown in FIGS. 2 and 4, the sprue 62 is disposed on the lower surface of the upper plate 70. The upper fixing plate 60 may be divided into a three-stage injection molding apparatus that is lifted up and down with respect to the upper plate 70.

As shown in FIG. 3 or 4, the lower mold fixing plate 10 includes a lower mold fixing means 11 for fixing the lower mold plate 20 to the upper surface and fixing the lower mold plate 20. Can be.

Here, the lower mold fixing plate 10 may be provided integrally with the lower mold plate 20 without including the lower mold fixing means 11.

In addition, the lower mold fixing plate 10 may further include a lower mold insulating plate 12 provided with a material having a low thermal conductivity for insulation on the lower surface.

Meanwhile, as shown in FIG. 3 or 4, the lower die plate 20 is fixed to the lower die plate fixing unit 11 on an upper surface of the lower die plate 10 so that the lower die chase 40 is inserted and seated. Prepared.

Here, when the lower die chase 40 is inserted, the lower die chase guide 22 may be formed to guide the insertion.

Here, the lower mold chase guide 22 may be provided integrally with the lower mold plate 20, or may be separately provided and coupled to a fixing means.

In addition, the lower die plate 20 is combined with the upper die plate 70 when the upper die plate 70 is moved up and down, the guide rod 71 provided in the upper die plate 70 so as not to flow left and right is inserted A plurality of guide holes 21 may be formed.

The guide rods 71 and the guide holes 21 may be provided in various numbers. Preferably, the guide rods 71 and four guide holes 21 may be provided at four corners of the lower die plate 20 and the upper die plate 70.

On the other hand, the lower mold chase 40 is inserted into the lower die plate 20, as shown in Figure 5a or 5b, the lower core seating space 45 for seating the lower core 50 on the upper surface is Can be formed.

Here, the lower chase 40 may be formed on the front surface of the lower chase handle 41 so that the user can easily insert or withdraw the lower chase 40 to the lower plate 20.

Therefore, the injection molding apparatus according to the present invention makes it easy for an operator to insert or withdraw the lower mold chase 40 from the lower mold plate 20 using the lower mold chase handle 41.

In addition, the lower mold chase 40 may further include a lower mold chase fixing means 42 to be inserted into the lower mold plate 20 to be seated on the lower mold plate 20.

In addition, the lower mold chase 40 may have an insertion hole 43 into which an insertion protrusion 83 formed on a lower surface of the upper mold chase 80 may be inserted.

Here, the lower mold chase 40 may be coupled to the upper mold chase 80 by the insertion protrusion 83 is inserted into the insertion hole 43 when the upper mold chase 80 is lowered.

This means that when the lower chase 40 and the upper chase 80 are coupled, the lower core injection groove 52 and the upper core injection groove 93 formed in the lower core 50 and the upper core 90 are accurate. In combination with the position to allow the injection space 94 corresponding to the shape of the injection molding 100 can be formed.

In addition, the lower mold chase 40 may further include a lifting unit 44 for lifting the plate 30.

On the other hand, the lower core 50 is seated in the lower core seating space 45 formed in the lower chase 40, as shown in Figure 5a or 5b, so that it can be fixed to the lower chase 40 The lower core fixing means 51 may be included.

Here, the lower core 50, the lower core injection groove 52 is formed on the upper surface corresponding to a part of the injection molding 100 in order to form the injection molding 100, the lower core injection groove 52 The upper core injection groove 93 may be formed on the lower surface of the upper core 90 to correspond to the shape of the remaining injection molding 100 except for the above.

Therefore, when the lower core 50 and the upper core 90 are coupled, the lower core injection groove 52 and the upper core injection groove 93 are coupled to each other, as shown in FIG. An injection space 94 corresponding to the shape is formed.

In addition, the lower core 50 may be made of various materials, and preferably, may be made of alloy steel, aluminum alloy or alloy cast iron.

Meanwhile, as shown in FIG. 3 or 4, the plate 30 is provided below the lower mold chase 40 to push up the injection molded product 100 formed in the injection space 94. It can be coupled by the chase 40 and the plurality of coupling means (32).

Here, the mill plate 30 may include a plurality of mill pins 31 for pushing up the injection molding 100, as shown in FIG. 7, and the mill pins 31 may include the lower mold chase 40 and It is provided to push up the injection molding 100 through the lower core 50.

Therefore, in the injection molding apparatus according to the present invention, the operator 100 withdraws the injection molded product 100 by protruding the injection molded product 100 formed in the injection space 94 from the lower core 50. To facilitate.

In addition, the plate 30 may be raised by the lifting unit 44, it may be lowered by the elastic force of the elastic member 33 provided in the coupling means (32).

On the other hand, the upper fixing plate 60 is a two-stage injection molding apparatus, as shown in Figure 3, the upper plate 70 is fixed to the lower surface, the upper plate 70 is by the upper plate fixing means 64 It may be fixed to the upper fixing plate 60.

Here, the upper plate fixing plate 60 may be integrally formed with the upper plate 70 without including the upper plate fixing means 64.

On the other hand, the upper fixing plate 60 is a three-stage injection molding apparatus, as shown in Figure 4, is coupled to the upper plate 70 by a fuller bolt 69, for the present upper plate 70 It can be lifted up and down.

In addition, the upper fixing plate 60, like the lower fixing plate 10, may further include an upper heat insulating plate 61 provided with a material having a low thermal conductivity for thermal insulation on the upper surface.

In addition, the upper fixing plate 60 may further include a rocket ring 63 to insert a nozzle (not shown) for injecting a molten resin that is the material of the injection molding 100, the rocket ring ( 63 may be fixed to the upper plate fixing plate 60 by the rocket ring fixing means (63-1).

Here, the molten resin that is the material of the injection molding 100 may be provided with a thermoplastic resin.

On the other hand, the upper plate 70 is provided so that the upper mold chase 80 is inserted and seated, in the two-stage injection molding apparatus, as shown in Figure 3, the upper plate fixing means on the lower surface of the upper plate fixing plate 60 Coupling is fixed to (64), in the case of a three-stage injection molding apparatus, as shown in Figure 4, it can be combined with the upper mold fixing plate 60 by the puller bolt (69).

In addition, the upper plate 70, a plurality of guide rods that can be inserted into the guide hole 21 provided in the lower plate 20 so that the upper plate 70 is not moved left and right, but only up and down ( 71) can be formed.

In addition, the upper plate (70) when the upper chase 80 is inserted, the upper chase guide 72 to guide the insertion may be formed.

Here, the upper chase guide 72 may be formed integrally with the upper plate 70, or may be provided separately and coupled to the fixing means.

On the other hand, the upper chase 80 is inserted and seated in the upper plate (70), as shown in Figure 5b, the upper core seating space 85 for seating the upper core 90 may be formed on the lower surface. .

Here, the pictograph chase 80 may include a pictograph chase handle 81 to facilitate the user to insert or withdraw the pictograph chase 80 to the upper plate (70).

Therefore, the injection molding apparatus according to the present invention makes it easy for an operator to insert or withdraw the upper mold chase 80 from the upper plate 70 by using the upper mold chase handle 81.

In addition, the upper body chase 80 may further include the upper body chase fixing means 82 to be inserted into the upper plate (70) to be fixed to the upper plate (70).

Here, the upper chase fixing means 82, like the lower chase fixing means 42, is preferably provided in two on the left and right sides.

In addition, the upper mold chase 80 may be formed on the lower surface of the insertion protrusion 83 is inserted into the insertion hole 43 of the lower mold chase (40).

Here, the upper body chase 80 is the insertion protrusion 83 is inserted into the insertion hole 43 when the upper body chase 80 is lowered can be fixed.

In addition, as shown in FIG. 5A, the upper mold chase 80 may have a upper mold chase inlet 84 through which molten resin of the injection molding 100 may be injected.

On the other hand, the upper core 90 is mounted in the upper core seating space 85 formed in the upper chase 80, and includes an upper core fixing means 91 to be seated and fixed to the upper chase 80 can do.

Here, the upper core 90, the upper core injection groove 93 is formed on the lower surface corresponding to a part of the injection molding 100 in order to form the injection molding 100, except the upper core injection groove 93 The lower core injection groove 52 may be formed on the upper surface of the lower core 50 to correspond to the shape of the remaining injection molding 100.

Therefore, when the upper core 90 and the lower core 50 are coupled, the upper core injection groove 93 and the lower core injection groove 52 are coupled to the injection space 94 corresponding to the shape of the injection molding 100. ) Is formed.

In addition, the upper core 90, the upper core inlet 92 may be formed so that the molten resin of the injection molding 100 can be injected into the injection space (94).

As shown in FIG. 3 or FIG. 4, the upper core inlet 92 penetrates at the same position as the upper body chase inlet 84 and the molten resin reaches the injection space 94.

In addition, the upper core 90 may be made of various materials, and preferably, may be made of alloy steel, aluminum alloy or alloy cast iron.

On the other hand, the three-stage injection molding apparatus according to the present invention, as shown in Figure 4, the molten resin is injected in the nozzle (not shown) is the upper mold so that the resin can be sent to the upper mold chase inlet 84 It may further include a sprue 62 mounted on the lower surface of the fixing plate 60.

Here, the sprue 62 is a sprue bush 62-1 to which the molten resin is injected and a sprue fixing plate for fixing the sprue bush 62-1 to the upper plate 70. 62-2).

In addition, the sprue 62 may further include a sprue fixing means 62-3 to be fixed to the upper plate (70).

Meanwhile, the three-stage injection molding apparatus according to the present invention may further include a puller bolt 69 for elevating the upper mold fixing plate 60 up and down with respect to the upper mold plate 70.

Here, as shown in FIG. 4, the puller bolt 69 is coupled to the upper plate fixing plate 60 and inserted into the guide rod 71 so that the upper plate fixing plate 60 is provided with respect to the upper plate 70. It may be provided to move up and down.

Hereinafter, the disassembly and operation of the injection molding apparatus according to the present invention will be described in detail with reference to FIGS. 6 and 7.

FIG. 6 illustrates a form in which the lower mold chase 40 is inserted into or withdrawn from the lower mold plate 20 in a sliding manner.

In addition, Figure 7 shows the process of molding the injection molding 100 in the three-stage injection molding apparatus according to the present invention.

First, the upper mold chase 80 and the lower mold chase 40 are inserted into the upper mold plate 70 and the lower mold plate 20, respectively.

In addition, the upper mold chase 80 and the lower mold chase 40 is fixed to the upper mold plate 70 and the lower mold plate 20 by the upper mold chase fixing means 82 and the lower mold chase fixing means 42.

Here, the upper plate 70 is lowered relative to the lower plate 20, the upper plate fixing plate 60 is lowered relative to the upper plate 70, the insertion projection 83 of the upper chase 80 Is inserted into the insertion hole 43 of the lower mold chase 40 is coupled.

Next, a nozzle for injecting molten resin, which is a raw material of the injection molding 100, is inserted into the rocket ring 63, and the molten resin is injected through the sprue 62 and the upper chase 80. It is injected into the space 94.

Next, after the resin injected into the injection space 94 is cooled, the upper plate fixing plate 60 is raised relative to the upper plate 70, and the upper plate 70 is raised relative to the lower plate 20. do.

Here, the injection molding apparatus according to the present invention may further include an elevating device 99 for elevating the upper plate 70 with respect to the lower plate 20.

Next, when the mill plate 30 is raised to the lower mold chase 40, the mill pin 31 protrudes the injection molded product 100 out of the injection space 94.

On the other hand, in order to replace the upper core 90 and the lower core 50 of the molding is completed with another upper core 90 and the lower core 50, as shown in Figure 6b, the lower mold chase fixing means When the 42 is removed and the lower chase handle 41 is pulled, it is slid out of the upper plate 70.

If the lower core fixing means 51 is removed from the separated lower chase 40, the lower core 50 may be withdrawn from the lower chase 40 and replaced with a new lower core 50.

In addition, even when the upper core 90 is replaced in the upper mold chase 80, it is as described above.

Up to now, the process of injecting the injection molding 100 in the three-stage injection molding apparatus according to the present invention with reference to Figure 7, but in the case of a two-stage injection molding apparatus, sprue 62 in the three-stage injection molding apparatus ) Is the same as described above, except that the upper mold fixing plate 60 and the upper mold plate 70 are fixed and lifted up integrally.

Therefore, in the injection molding apparatus according to the present invention, the upper mold chase 80 and the lower mold chase 40 can be inserted into or withdrawn from the upper mold plate 70 and the lower mold plate 20 in a sliding manner, The upper core 90 and the lower core 50 can be easily exchanged to simplify the manufacturing process.

In addition, in the injection molding apparatus according to the present invention, since only the upper core 90 and the lower core 50 need to be replaced when the molding process of the injection molding 100 is completed, the manufacturing cost is reduced.

Therefore, the injection molding apparatus according to the present invention, by inserting or withdrawing the upper chase and the lower chase in which the upper core and the lower core is seated in the upper plate and the lower plate in a sliding manner, and the upper core and the injection molded product Easy exchange of lower cores simplifies the manufacturing process.

In addition, in the injection molding apparatus according to the present invention, when the molding process of the injection molding is completed, the upper chase and the lower chase are drawn out in a sliding manner so that only the upper core and the lower core need to be replaced, thereby reducing the manufacturing cost.

In addition, the injection molding apparatus according to the present invention makes it easy for an operator to insert or withdraw the upper and lower chases from the upper and lower plates by using the upper and lower chase handles.

In addition, the injection molding apparatus according to the present invention facilitates the operator to take out the injection by the extrusion of the molded article molded in the injection space from the lower core.

Claims (11)

Lower fixed plate; A lower die plate coupled to an upper surface of the lower die plate and having a plurality of guide holes; A lower chase coupled to the lower plate and having a lower core seating space formed on an upper surface thereof; A lower core detachably seated in the lower core seating space; Pictograph fixing plate; An upper plate coupled to a lower surface of the upper plate fixing plate and having a plurality of guide rods inserted into the guide hole; An upper chase coupled with the upper plate and having an upper core seating space formed on a lower surface thereof; And an upper core detachably seated in the upper core seating space. The upper body chase is inserted into the side of the upper plate in a sliding manner is fixed to the upper plate by two or more upper body chase fixing means, The lower mold chase is inserted into the side of the lower plate in a sliding manner injection molding apparatus, characterized in that coupled to the lower plate by two or more lower mold chase fixing means. The method of claim 1, The hieroglyphic chase has two or more insertion protrusions formed on a lower surface thereof. The lower chase is formed with an insertion hole corresponding to the position of the insertion protrusion, Injection molding apparatus characterized in that the insertion protrusion is inserted into the insertion hole is fixed. The method of claim 1, The lower mold fixing plate is formed with a lower insulation board for insulation on the lower surface, The upper mold fixing plate is an injection molding apparatus, characterized in that the upper heat insulating plate for heat insulation is formed on the upper surface. The method of claim 1, The lower chase is additionally included in the lower surface of the bottom plate is coupled by a plurality of coupling means to flow up and down, The mill plate, the injection molding apparatus characterized in that it comprises a plurality of pins that can push up the injection molded from the lower core through the lower mold chase and the lower core. The method of claim 1, The lower mold chase and the upper mold chase further include a lower mold chase handle and an upper mold chase handle for insertion or withdrawal from the lower plate and the upper plate. Lower fixed plate; A lower die plate coupled to an upper surface of the lower die plate and having a plurality of guide holes; A lower chase coupled to the lower plate and having a lower core seating space formed on an upper surface thereof; A lower core detachably seated in the lower core seating space; Pictograph fixing plate; Sprues coupled to the upper surface of the fixing plate; An upper plate formed on a lower surface of the upper plate fixing plate and coupled with a puller bolt to move upward and downward, and having a plurality of guide bars inserted into the guide hole; An upper chase coupled with the upper plate and having an upper core seating space formed on a lower surface thereof; And an upper core detachably seated in the upper core seating space. The upper body chase is inserted into the side of the upper plate in a sliding manner is fixed to the upper plate by two or more upper body chase fixing means, The lower mold chase is inserted into the side of the lower plate in a sliding manner injection molding apparatus, characterized in that coupled to the lower plate by two or more lower mold chase fixing means. The method of claim 6, The hieroglyphic chase has two or more insertion protrusions formed on a lower surface thereof. The lower chase is formed with an insertion hole corresponding to the position of the insertion protrusion, Injection molding apparatus characterized in that the insertion protrusion is inserted into the insertion hole is fixed. The method of claim 6, The lower mold fixing plate is formed with a lower insulation board for insulation on the lower surface, The upper mold fixing plate is an injection molding apparatus, characterized in that the upper heat insulating plate for heat insulation is formed on the upper surface. The method of claim 6, The lower mold chase is further included in the lower surface of the bottom plate is coupled by a plurality of coupling means to flow up and down, The mill plate, the injection molding apparatus characterized in that it comprises a plurality of pins that can push up the injection molded from the lower core through the lower mold chase and the lower core. The method of claim 6, The lower mold chase and the upper mold chase further comprises a handle portion for insertion or withdrawal from the lower mold plate and the upper mold plate. The method of claim 6, The sprue is a sprue bush in which the raw material of the injection is injected, Injection molding apparatus characterized in that it is formed of a sprue fixing plate for fixing the sprue bushing to the upper fixing plate.

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