CN216658784U - An injection mold with automatic dehydration port - Google Patents

Abstract

The utility model provides an injection mold with an automatic dehydration port, which comprises an upper mold component, a lower mold component and an ejector component. The bottom of the groove has an inverted button-like structure; the ejector assembly includes a push plate, a product ejector pin, and a nozzle ejector pin, the lower end of the product ejector pin is fixedly connected with the push plate, and the upper end of the product ejector pin extends to the bottom of the mold cavity; The nozzle ejector includes a first round rod portion, a limit portion connected to the lower end of the first round rod portion, and a second round rod portion connected to the lower end of the limit portion, and the upper end of the first round rod portion extends to the At the bottom of the water spout groove, the push plate is provided with an inner hole for the limiting portion to slide in the vertical direction, and a time-delayed void area is formed between the bottom of the limiting portion and the bottom of the inner hole. The injection mold of the utility model can realize the automatic separation of the injection molded product and the nozzle when the material is ejected, and the subsequent manual nozzle cutting is not required, thereby improving the production efficiency.

Description

An injection mold with automatic dehydration port

technical field

The utility model relates to the technical field of molds, in particular to an injection mold with an automatic dehydration port.

Background technique

Injection molded products are common daily necessities. Due to the advantages of light weight, high strength, good durability and strong assembly, injection molded products are widely used in household products, medical equipment, building materials, sports equipment and other fields. In the production process of injection molding products, the plastic material in the molten state is usually stirred evenly by a screw extruder at a certain temperature, and then injected into the injection mold. The plastic material is formed in the cavity of the injection mold, and after cooling and solidification, Molded injection molded products. After injection molding products, there will be residual nozzles, which usually require artificial dehydration nozzles, resulting in low production efficiency.

Utility model content

In view of the above problems, the present invention provides an injection mold with an automatic dehydration port, which can realize the automatic separation of the injection molded product and the nozzle when the material is ejected, and does not require subsequent manual dehydration ports, thereby improving the production efficiency.

To achieve the above object, the present invention solves by the following technical solutions:

An injection mold with automatic dehydration port includes an upper mold assembly, a lower mold assembly, and an ejector assembly, the upper mold assembly includes an upper mold core, and the inner side of the upper mold core is provided with a plurality of injection flow channels, so the The lower mold assembly includes a lower mold core, and a plurality of mold cavities corresponding to the positions of the injection runners are formed on the lower mold core;

The middle of the mold cavity is provided with a nozzle groove communicating with the mold cavity, and the bottom of the nozzle groove has an inverted button-like structure;

The ejector assembly includes a push plate, a product ejector pin, and a nozzle ejector pin, the lower end of the product ejector pin is fixedly connected with the ejector plate, and the upper end of the product ejector pin extends to the bottom of the mold cavity;

The nozzle thimble includes a first round rod portion, a limit portion connected to the lower end of the first round rod portion, and a second round rod portion connected to the lower end of the limit portion, and the upper end of the first round rod portion extends to the At the bottom of the nozzle groove, the push plate is provided with an inner hole for the limiting portion to slide in the vertical direction, and a time-delayed void area is formed between the bottom of the limiting portion and the bottom of the inner hole.

Specifically, the height of the time delay avoidance area along the vertical direction is 2-4 mm.

Specifically, the upper die assembly further includes an upper die seat plate, an upper die backing plate, and an upper die pressing plate, the lower end of the upper die pressing plate is provided with a first groove, and the upper die core is fixed in the first groove On the inner side of the groove, the upper end of the upper die base plate is provided with an injection port that communicates with the injection flow channel.

Specifically, a first water inlet and a first water outlet are provided on one side of the upper molding plate, and a first cooling water pipe is connected between the first water inlet and the first water outlet, and the first cooling water pipe extends to The inner side of the upper mold core.

Specifically, the lower die assembly further includes a lower die base plate, a lower die backing plate, and a lower die pressing plate, the lower end of the lower die pressing plate is provided with a second groove, and the lower die core is fixed in the second groove On the inner side of the groove, the inner side of the lower die backing plate is provided with a cavity, and the push plate is located inside the cavity.

Specifically, a second water inlet and a second water outlet are provided on one side of the lower molding plate, and a second cooling water pipe is connected between the second water inlet and the second water outlet, and the second cooling water pipe extends to The inner side of the lower mold core.

The beneficial effects of the present utility model are:

In the injection mold of the utility model, the nozzle ejector pin is designed as a delayed ejection structure. After the mold is opened, during the pushing process of the ejector plate, the product ejector pin is used to eject the injection molded product in the mold cavity first. Since the bottom of the nozzle groove is inverted Button-like structure, so the runner waste in the runner slot is not driven up by the injection molded product, so the runner position of the injection molded product is cut off. As the push plate continues to move up, the runner ejector pin 33 is driven up, and the runner ejector pin pushes the nozzle into the runner slot. The waste of the nozzle is ejected, so that the action of the dehydration port can be automatically completed during the ejection process, and the subsequent manual dehydration port is not required. The structure is simple and the processing efficiency is improved.

Description of drawings

Figure 1 is a top view of an injection molded product.

FIG. 2 is a cross-sectional view of the plane B-B in FIG. 1 .

3 is a schematic structural diagram of an injection mold of an automatic dehydration port of the present invention.

FIG. 4 is a schematic structural diagram of a lower mold assembly.

5 is a top view of an injection mold of an automatic dehydration port of the present invention.

FIG. 6 is a cross-sectional view of the plane A-A in FIG. 5 .

FIG. 7 is an enlarged view of part C in FIG. 6 .

FIG. 8 is an enlarged view of part D in FIG. 6 .

Reference numerals are: upper mold assembly 1, upper mold core 11, injection flow channel 111, upper mold seat plate 12, upper mold backing plate 13, upper mold pressing plate 14, lower mold assembly 2, lower mold core 21, mold Cavity 211, runner groove 212, lower die base plate 22, lower die backing plate 23, lower die pressing plate 24, ejector assembly 3, push plate 31, inner hole 311, delay escape area 312, product ejector 32, nozzle ejector 33. The first round rod portion 331, the limiting portion 332, the second round rod portion 333, the injection port 4, the first water inlet 51, the first water outlet 52, the first cooling water pipe 53, the second water inlet 61, the first The second water outlet 62 , the second cooling water pipe 63 , the injection molded product 7 , the nozzle waste 71 , and the undercut portion 711 .

Detailed ways

The present utility model will be described in further detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present utility model are not limited thereto.

As shown in Figure 1-8:

An injection mold with automatic dehydration port, including an upper mold assembly 1, a lower mold assembly 2, and an ejector assembly 3, the upper mold assembly 1 includes an upper mold core 11, and the inner side of the upper mold core 11 is provided with a plurality of injection flow channels 111. The lower mold assembly 2 includes a lower mold core 21, and a plurality of mold cavities 211 corresponding to the positions of the injection flow channels 111 are formed on the lower mold core 21;

The middle of the mold cavity 211 is provided with a nozzle groove 212 communicating with the mold cavity 211, and the bottom of the nozzle groove 212 has an inverted button-like structure;

The ejector assembly 3 includes a push plate 31, a product ejector pin 32, and a nozzle ejector pin 33. The lower end of the product ejector pin 32 is fixedly connected to the ejector plate 31, and the upper end of the product ejector pin 32 extends to the bottom of the mold cavity 211;

The nozzle thimble 33 includes a first round rod portion 331, a limit portion 332 connected to the lower end of the first round rod portion 331, and a second round rod portion 333 connected to the lower end of the limit portion 332. The upper end of the first round rod portion 331 extends to At the bottom of the nozzle groove 212 , the push plate 31 is provided with an inner hole 311 for the limiting portion 332 to slide in the vertical direction.

Preferably, the height of the delay escape area 312 along the vertical direction is 3 mm.

Preferably, the upper mold assembly 1 further includes an upper mold base plate 12, an upper mold backing plate 13, and an upper mold pressing plate 14. The lower end of the upper mold pressing plate 14 is provided with a first groove, and the upper mold core 11 is fixed inside the first groove. , the upper end of the upper die seat plate 12 is provided with an injection port 4 which communicates with the injection flow channel 111 .

Preferably, a first water inlet 51 and a first water outlet 52 are provided on one side of the upper molding plate 14, and a first cooling water pipe 53 is connected between the first water inlet 51 and the first water outlet 52, and the first cooling water pipe 53 extends To the inner side of the upper mold core 11 , after injection molding is completed, cold water can be introduced into the first water inlet 51 , and the cold water flows through the first cooling water pipe 53 to bring out the internal heat, thereby accelerating the cooling speed of the injection molded product 7 .

Preferably, the lower die assembly 2 further includes a lower die base plate 22, a lower die backing plate 23, and a lower die pressing plate 24. The lower end of the lower die pressing plate 24 is provided with a second groove, and the lower die core 21 is fixed inside the second groove. , the inner side of the lower die pad 23 is provided with a cavity, and the push plate 31 is located inside the cavity.

Preferably, a second water inlet 61 and a second water outlet 62 are provided on one side of the lower molding plate 24, and a second cooling water pipe 63 is connected between the second water inlet 61 and the second water outlet 62, and the second cooling water pipe 63 extends To the inner side of the lower mold core 21 , after injection molding is completed, cold water can be introduced into the second water inlet 61 , and the cold water flows through the second cooling water pipe 63 to take out the internal heat, thereby accelerating the cooling speed of the injection molded product 7 .

The injection molding process is as follows:

After clamping and injection molding, the injection molded product 7 is formed in the mold cavity 211, and the nozzle waste 71 is formed in the nozzle groove 212. Since the bottom of the nozzle groove 212 has an inverted structure, the lower end of the nozzle waste 71 forms an inverted part 711;

After the mold is opened, the push plate 31 is pushed up by the driving device. During the upward movement of the push plate 31, since the lower end of the product ejector pin 32 is fixedly connected with the push plate 31, and the upper end of the product ejector pin 32 extends to the bottom of the mold cavity 211, the product ejector pin 32. First push out the injection molded product 7 formed in the mold cavity 211. At this time, due to the structural characteristics of the undercut portion 711, the nozzle waste 71 in the nozzle groove 212 is not driven up by the injection molded product 7 during the process of pushing the injection molded product 7. , and due to the addition of the time delay avoidance area 312, the nozzle ejector 33 has a delayed ejection function, so the nozzle ejector 33 does not eject the nozzle waste 71 at this stage, so that the injection product 7 and the nozzle waste 71 are misaligned, So that the nozzle position is cut off;

After the push plate 31 is moved up 3mm in the vertical direction, the limit part 332 of the nozzle ejector pin 33 contacts the inner bottom of the inner hole 311 , the nozzle ejector pin 33 is driven up by the push plate 31 , and the nozzle ejector pin 33 removes the nozzle waste 71 in the nozzle groove 212 In this way, the action of the dehydration port can be automatically completed during the ejection process, without the need for subsequent manual dehydration ports, the structure is simple, and the processing efficiency is improved.

The above embodiment only represents an embodiment of the present invention, and its description is more specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (6)

1. An injection mold of an automatic dewatering port, comprising an upper mold assembly (1), a lower mold assembly (2), and an ejector assembly (3), and the upper mold assembly (1) includes an upper mold core (11). ), the inner side of the upper mold core (11) is provided with a plurality of injection flow channels (111), the lower mold assembly (2) includes a lower mold core (21), and the lower mold core (21) is formed with a A plurality of mold cavities (211) corresponding to the positions of the injection runners (111), characterized in that: A nozzle groove (212) communicated with the mold cavity (211) is provided in the middle of the mold cavity (211), and the bottom of the nozzle groove (212) has an inverted button-like structure; The ejector assembly (3) includes a push plate (31), a product ejector pin (32), and a nozzle ejector pin (33). The lower end of the product ejector pin (32) is fixedly connected to the push plate (31). (32) the upper end extends to the bottom of the cavity (211); The nozzle ejector pin (33) includes a first round rod portion (331), a limiting portion (332) connected to the lower end of the first round rod portion (331), and a limiting portion (332) connected to the lower end of the limiting portion (332). The second round rod portion (333), the upper end of the first round rod portion (331) extends to the bottom of the nozzle groove (212), and the push plate (31) is provided with the limiting portion (332) In the inner hole (311) sliding in the vertical direction, a time-delayed void area (312) is formed between the bottom of the limiting portion (332) and the bottom of the inner hole (311). 2 . The injection mold of an automatic dehydration port according to claim 1 , wherein the height of the time-delayed void area ( 312 ) along the vertical direction is 2-4 mm. 3 . 3. The injection mold of an automatic dehydration port according to claim 1, wherein the upper mold assembly (1) further comprises an upper mold seat plate (12), an upper mold backing plate (13), an upper mold A molding plate (14), the lower end of the upper molding plate (14) is provided with a first groove, the upper mold core (11) is fixed inside the first groove, and the upper mold seat plate (12) upper end An injection port (4) communicated with the injection flow channel (111) is provided. 4. The injection mold of an automatic dehydration port according to claim 3, wherein a first water inlet (51) and a first water outlet (52) are provided on one side of the upper molding plate (14), A first cooling water pipe (53) is connected between the first water inlet (51) and the first water outlet (52), and the first cooling water pipe (53) extends to the inner side of the upper die core (11). 5. The injection mold of an automatic dewatering port according to claim 1, wherein the lower mold assembly (2) further comprises a lower mold base plate (22), a lower mold backing plate (23), a lower mold base plate (23), a lower mold base plate (23), A molding plate (24), the lower end of the lower molding plate (24) is provided with a second groove, the lower mold core (21) is fixed on the inner side of the second groove, and the inner side of the lower mold backing plate (23) A cavity is provided, and the push plate (31) is located inside the cavity. 6. The injection mold of an automatic dehydration port according to claim 5, wherein a second water inlet (61) and a second water outlet (62) are provided on one side of the lower molding plate (24), A second cooling water pipe (63) is connected between the second water inlet (61) and the second water outlet (62), and the second cooling water pipe (63) extends to the inner side of the lower mold core (21).

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