TWM636230U - Dual mold for injection molding - Google Patents

Abstract

A master mold for injection molding, comprising a pressure mold and a forming mold. The pressure mold is provided with a pressure mold cavity. The forming mold is set in the pressurized cavity, and a forming cavity and an injection channel are set up, the injection channel communicates with the forming cavity, the injection channel is used for injecting molten plastic material, and the forming cavity is used for The molten plastic material is molded into a finished product. Thereby, the pressure mold can provide enough pressure channels to resist the pressure generated by the molten plastic material, so as to prevent the pressure generated by the molten plastic material from stretching the forming mold.

Description

Master mold for injection molding

This creation is about a mold, especially a master mold for injection molding.

Injection molding is to heat and melt the plastic and inject it into the molding mold. After a period of cooling and setting, the molding mold is opened to take out the finished product.

However, when the molten plastic material enters the molding cavity, a pressure will be generated, and the pressure will open the molding mold, causing the molten plastic material to flow out.

The main purpose of this creation is to provide a master mold for injection molding, which can prevent the pressure generated by the molten plastic material from propping the molding mold apart by means of pressurization.

In order to achieve the aforementioned purpose, the present invention provides a master mold for injection molding, including a pressurizing mold and a forming mold. A pressurized mold cavity is provided in the pressurized mold. The forming mold is set in the pressurized cavity, and a forming cavity and an injection channel are set up, the injection channel communicates with the forming cavity, and the injection channel is used for injecting molten plastic material. The molding cavity is used for molding the molten plastic material into a finished product.

In some embodiments, the injection channel is located at one side of the molding die.

In some embodiments, the forming mold includes a first inner mold and a second inner mold, the first inner mold opens a first inner mold cavity and a first notch, and the first notch is located in the first inner mold One side of the second inner mold is provided with a second inner mold cavity and a second notch, and the second notch is located on one side of the second inner mold; wherein, when the first inner mold and the second inner mold When the molds are closed, the first inner mold cavity and the second inner mold cavity jointly form the forming mold cavity, and the first notch and the second notch jointly form the injection channel.

In some embodiments, the first notch runs through the outer surface of the first inner mold, a retaining wall is formed between the first notch and the first inner mold cavity, and the second notch runs through the outer surface of the second inner mold On the surface, the second notch communicates with the second inner mold cavity.

In some embodiments, the forming mold further includes a positioning mechanism, the positioning mechanism includes at least one positioning hole and at least one positioning column, and the at least one positioning hole is opened between the first inner mold and the second inner mold One, the at least one positioning post protrudes from the other of the first inner mold and the second inner mold; wherein, when the first inner mold and the second inner mold are closed, the at least one positioning post is inserted Set in the at least one positioning hole.

In some embodiments, the forming mold defines a reserved hole, the reserved hole runs through the outer surface of the forming mold, and a partition wall is formed between the reserved hole and the forming cavity.

In some embodiments, the reserved hole is located at one end of the molding die.

In some embodiments, the forming mold includes a first inner mold and a second inner mold, the first inner mold opens a first inner mold cavity and a first hole, the first hole is located in the first inner mold One end of the first inner mold runs through the outer surface of the first inner mold, a first thin wall is formed between the first hole and the first inner mold cavity, and a second inner mold cavity and a second hole are opened in the second inner mold , the second hole is located at one end of the second inner mold and runs through the outer surface of the second inner mold, a second thin wall is formed between the second hole and the second inner mold cavity; wherein, when the first When the inner mold is closed with the second inner mold, the first inner mold cavity and the second inner mold cavity jointly form the forming mold cavity, the first hole and the second hole jointly form the reserved hole, and the first inner mold cavity jointly forms the forming cavity. A thin wall and the second thin wall jointly constitute the partition wall.

In some embodiments, the pressurized mold includes a first outer mold and a second outer mold, the first outer mold opens a first outer mold cavity, and the second outer mold opens a second outer mold cavity; wherein , when the first outer mold and the second outer mold are clamped, the first outer mold cavity and the second outer mold cavity together form the pressurized mold cavity.

In some embodiments, the pressing mold is made of steel, and the forming mold is made of aluminum.

The efficacy of the invention lies in that the pressurized mold can provide enough pressurized pressure channels to resist the pressure generated by the molten plastic material, so as to prevent the pressure generated by the molten plastic material from propping the forming mold apart.

The implementation of this creation will be described in more detail below in conjunction with the drawings and component symbols, so that those who are familiar with the art can implement it after studying this manual.

Fig. 1 is a perspective view of the mother-child mold of this creation, Fig. 2 is a perspective view of the forming mold 20 of this creation breaking away from the pressurizing mold 10, Fig. 3 is an exploded view of the forming mold 20 of this creation, and Fig. 4 is the line IV of Fig. 1 -IV sectional view, FIG. 5 is a sectional view of line V-V in FIG. 1 . As shown in FIGS. 1 to 5 , the invention provides a master mold for injection molding, including a pressurizing mold 10 and a forming mold 20 .

The pressing mold 10 includes a first outer mold 11 and a second outer mold 12 , the first outer mold 11 defines a first outer mold cavity 111 , and the second outer mold 12 defines a second outer mold cavity 121 . When the first outer mold 11 and the second outer mold 12 are closed, the first outer mold cavity 111 and the second outer mold cavity 121 together form a pressurized mold cavity 13 .

The forming mold 20 is disposed in the press cavity 13 and includes a first inner mold 21 , a second inner mold 22 and a positioning mechanism 23 . The first inner mold 21 provides a first inner mold cavity 211, a first notch 212 and a first hole 213, the first notch 212 is located on one side of the first inner mold 21 and runs through the outer surface of the first inner mold 21, A retaining wall 214 is formed between the first gap 212 and the first inner mold cavity 211, the first hole 213 is located at one end of the first inner mold 21 and runs through the outer surface of the first inner mold 21, and the first hole 213 and the first A first thin wall 215 is formed between the inner mold cavities 211 . The second inner mold 22 provides a second inner mold cavity 221, a second notch 222 and a second hole 223, the second notch 222 is located on one side of the second inner mold 22 and runs through the outer surface of the second inner mold 22, The second gap 222 communicates with the second inner mold cavity 221, the second hole 223 is located at one end of the second inner mold 22 and runs through the outer surface of the second inner mold 22, and between the second hole 223 and the second inner mold cavity 221 A second thin wall 224 is formed. When the first inner mold 21 and the second inner mold 22 are closed, the first inner mold cavity 211 and the second inner mold cavity 221 jointly form a forming mold cavity 24, and the first notch 212 and the second notch 222 jointly form a injection cavity. The material channel 25 , the first hole 213 and the second hole 223 jointly form a reserved hole 26 , and the first thin wall 215 and the second thin wall 224 jointly form a partition wall 27 . The positioning mechanism 23 includes two positioning holes 231 and two positioning posts 232 , the positioning holes 231 are opened in the first inner mold 21 , and the positioning posts 232 are protrudingly provided in the second inner mold 22 . When the first inner mold 21 and the second inner mold 22 are clamped, the positioning columns 232 are respectively inserted into the positioning holes 231 to prevent misalignment between the first inner mold 21 and the second inner mold 22 .

The following will describe in detail the injection molding process of the master mold for injection molding of this creation.

FIG. 6 is a cross-sectional view of molten plastic material injected into the molding die 20 of the present invention. As shown in Figure 6, and please refer to Figure 4, first, the forming mold 20 is placed horizontally in an injection machine (not shown); Then, the nozzle injects molten plastic material into the injection channel 25 ; finally, the molten plastic material enters the molding cavity 24 through the injection channel 25 . It is worth mentioning that the retaining wall 214 separates the first notch 212 from the first inner mold cavity 211, so that the first notch 212 does not communicate with the first inner mold cavity 211, so the outlet of the second notch 222 is essentially The outlet of injection channel 25. Since the inner diameter of the injection channel 25 is wider, but the inner diameter of the outlet of the injection channel 25 is narrower, it helps to control the speed at which the molten plastic material enters the molding cavity 24 .

FIG. 7 is a schematic diagram of placing the master mold of the present invention on the pressing machine 100 . As shown in Figure 7, and please refer to Figure 1, at first, the pressure mold 10 is placed in a press machine table 100; In the mold cavity 13. Further, when the molten plastic material enters the molding cavity 24, a pressure will be generated, and the pressurizing machine 100 pressurizes the pressurizing mold 10, so that the pressurizing mold 10 can provide enough pressurized pressure channels to resist the molten plastic material. The pressure generated by the plastic material prevents the molding die 20 from being stretched by the pressure generated by the molten plastic material.

In some embodiments, the pressing mold 10 is made of steel, and the forming mold 20 is made of aluminum. The structural strength of the aluminum material is weak, so that the forming mold 20 is easily stretched by the pressure generated by the molten plastic material. The structural strength of the steel is strong, so that the pressure mold 10 can provide enough pressure channels to resist the pressure generated by the molten plastic material, so as to prevent the forming mold 20 from being stretched by the pressure generated by the molten plastic material.

FIG. 8 is a perspective view of the forming mold 20 placed in the cooling water tank 200 of the present invention. As shown in Fig. 8, please refer to Fig. 1, Fig. 2 and Fig. 4, at first, press mold 10 is opened, and take out forming mold 20; Then, forming mold 20 is placed in a cooling water tank 200, forming mold 20 Gradually cool. Specifically, the plastic material in the molding cavity 24 is formed into a finished product 300 (see FIG. 9 ), and the plastic material staying in the injection channel 25 is formed into a cylinder 310, and the cylinder 310 and the finished product 300 are integrally formed; Because the surface temperature of the forming mold 20 is quite high, it is easy to burn the user's hand, so the user must use a tool (not shown) to clamp the cylinder 310 to be able to take out the forming mold 20 from the pressurizing mold 10, and form the The mold 20 is placed in the cooling water tank 200 .

Fig. 9 is an open perspective view of the molding die 20 of the present invention. As shown in FIG. 9 , after the forming mold 20 is cooled to room temperature, the user takes out the forming mold 20 from the cooling water tank 200 , then opens the forming mold 20 , and takes out the finished product 300 from the second inner cavity 221 .

FIG. 10 is a perspective view of the finished product 300 placed in the cooling water tank 200 . As shown in FIG. 10 , the finished product 300 is placed in the cooling water tank 200 , and the finished product 300 is gradually cooled.

In case the first inner mold 21 and the second inner mold 22 have problems with unsmooth demoulding, the user can take a tool and insert it into the reserved hole 26, and use the tool to drill holes on the partition wall 27, so that the reserved hole 26 communicates with molding cavity 24. In addition, external air can enter the molding cavity 24 through the reserved hole 26, so that the first inner mold 21 and the second inner mold 22 can be demolded smoothly.

The above-mentioned ones are only used to explain the preferred embodiments of this creation, and are not intended to limit this creation in any form. Therefore, any modifications or changes made to this creation under the same spirit of creation , should still be included in the category of protection intended for this creation.

10:Pressure mold 11: The first outer mold 111: The first outer mold cavity 12: The second outer mold 121: The second outer cavity 13: Pressurized cavity 20: Forming mold 21: The first inner mold 211: The first inner mold cavity 212: The first gap 213: The first hole 214: retaining wall 215: The first thin wall 22: Second inner mold 221: The second inner mold cavity 222: The second gap 223: The second hole 224: second thin wall 23: Positioning mechanism 231: positioning hole 232: positioning column 24: Forming cavity 25: Injection channel 26: reserved hole 27: Partition wall 100: Pressing machine 200: cooling water tank 300: finished product 310: cylinder

Fig. 1 is the three-dimensional view of the son mother mold of this creation. Fig. 2 is a perspective view of the forming mold of the present invention breaking away from the pressurizing mold. Fig. 3 is the exploded view of the molding die of this creation. Fig. 4 is a sectional view taken along line IV-IV of Fig. 1 . Fig. 5 is a cross-sectional view taken along line V-V in Fig. 1 . Fig. 6 is a cross-sectional view of molten plastic material injected into the molding die of the invention. Fig. 7 is the sketch map that the sub-mold mold of this creation is placed on the pressing machine. Fig. 8 is a perspective view of the forming mold of the invention placed in the cooling water tank. Fig. 9 is an open perspective view of the forming mold of the present invention. Fig. 10 is a perspective view of the finished product placed in the cooling water tank.

10:Pressure mold

11: The first outer mold

12: The second outer mold

20: Forming mold

21: The first inner mold

22: Second inner mold

26: reserved hole

Claims (10)

A master mold for injection molding, comprising: A pressurized mold, opening a pressurized mold cavity; and A forming mold is arranged in the pressurized cavity, and a forming cavity and an injection channel are opened, the injection channel communicates with the forming cavity, and the injection channel is used for injecting molten plastic material, The molding cavity is used for molding the molten plastic material into a finished product. The master mold for injection molding according to claim 1, wherein the injection channel is located at one side of the molding mold. The master mold for injection molding as described in claim 2, wherein the forming mold includes a first inner mold and a second inner mold, and the first inner mold has a first inner mold cavity and a first inner mold cavity. Notch, the first notch is located on one side of the first inner mold, the second inner mold has a second inner mold cavity and a second notch, the second notch is located on one side of the second inner mold; wherein, When the first inner mold and the second inner mold are closed, the first inner mold cavity and the second inner mold cavity jointly form the forming mold cavity, and the first notch and the second notch jointly form the injection material aisle. The master mold for injection molding according to claim 3, wherein the first notch runs through the outer surface of the first inner mold, and a retaining wall is formed between the first notch and the first inner mold cavity, The second notch runs through the outer surface of the second inner mold, and the second notch communicates with the second inner mold cavity. The master mold for injection molding according to claim 3, wherein the molding mold further includes a positioning mechanism, the positioning mechanism includes at least one positioning hole and at least one positioning column, and the at least one positioning hole is opened in the first One of an inner mold and the second inner mold, the at least one positioning post protrudes from the other of the first inner mold and the second inner mold; wherein, when the first inner mold and the second inner mold When the inner mold is closed, the at least one positioning post is inserted into the at least one positioning hole. The master mold for injection molding as described in claim 1, wherein the molding mold is provided with a reserved hole, and the reserved hole runs through the outer surface of the molding mold, and the distance between the reserved hole and the molding cavity form a partition wall. The master mold for injection molding according to claim 6, wherein the reserved hole is located at one end of the molding mold. The master mold for injection molding as described in claim 7, wherein the forming mold includes a first inner mold and a second inner mold, and the first inner mold has a first inner mold cavity and a first inner mold cavity. A hole, the first hole is located at one end of the first inner mold and runs through the outer surface of the first inner mold, a first thin wall is formed between the first hole and the first inner mold cavity, and the second inner mold A second inner mold cavity and a second hole are opened, the second hole is located at one end of the second inner mold and runs through the outer surface of the second inner mold, and a hole is formed between the second hole and the second inner mold cavity A second thin wall; wherein, when the first inner mold and the second inner mold are closed, the first inner mold cavity and the second inner mold cavity jointly form the forming mold cavity, the first hole and the second inner mold cavity The second hole jointly forms the reserved hole, and the first thin wall and the second thin wall jointly form the partition wall. The master mold for injection molding as described in claim 1, wherein the pressurized mold includes a first outer mold and a second outer mold, the first outer mold opens a first outer mold cavity, and the first outer mold The second outer mold is provided with a second outer mold cavity; wherein, when the first outer mold and the second outer mold are closed, the first outer mold cavity and the second outer mold cavity jointly form the pressurized mold cavity. The sub-mold for injection molding according to claim 1, wherein the material of the pressurizing mold is steel, and the material of the forming mold is aluminum.

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