Injection mold with automatic gate removal

Abstract

The utility model relates to injection mold technical field, concretely relates to an injection mold of automatic removal of sprue, including upper die and lower die, the upper die and the lower die interval leave the cavity of injection product, injection runner is used for to the inside of cavity injection, the injection runner includes the feed port for feeding and two groups of injection port with feed port intercommunication, the lower die of injection port downside is provided with the sprue runner that communicates with the cavity, shearing assembly is established in the side of sprue runner for removing sprue, the shearing assembly includes the inflow hole of opening in lower die and the shearing ejector rod of inserting in the inflow hole, the shearing ejector rod is close to the side of sprue runner and is equipped with relatively sharp cutting edge, the utility model discloses through setting shearing assembly in the side of sprue runner, through the rising of shearing ejector rod in inflow hole, makes the cutting edge in the rising process, separates product and sprue perfectly.

Description

Technical Field

[0001] This utility model belongs to the field of injection molds, and specifically relates to an injection mold that automatically removes gates. Background Technology

[0002] After the traditional injection mold is closed, molten material is injected into the molding cavity through the injection port. This process usually leaves a gate on the finished product, which needs to be cut manually or by setting up a device in the subsequent processing. Cutting the gate requires additional steps and workers, which increases processing time and cost. Therefore, it is necessary to design an injection mold that can automatically remove the gate to solve the above problems. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides an injection mold that automatically removes gates, thereby solving the problem mentioned in the background art that injection molded products still need to undergo an additional process to remove gates after injection molding.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] An injection mold for automatically removing gates, comprising:

[0006] An upper mold and a lower mold, with a cavity for the injection molded product left between the upper mold and the lower mold;

[0007] Injection runner, used for injection molding inside the cavity, the injection runner includes a feed port for feeding material and two sets of injection ports connected to the feed port, and the lower mold below the injection port is provided with a sprue runner connected to the cavity.

[0008] A shearing assembly is provided on the side of the gate runner for removing the gate. The shearing assembly includes an inlet hole opened in the lower mold and a shearing ejector inserted into the inlet hole. The shearing ejector has a relatively sharp cutting edge on the side near the gate runner.

[0009] As a further improvement to this utility model, the gating channel is generally funnel-shaped, and the output end of the gating channel is set as a flat rectangular outlet.

[0010] As a further improvement to this utility model, the shearing ejector has an inflow groove on the side near the gate runner. The inflow groove has a structure that is wider at the bottom and narrower at the top. A gap is left between the top of the shearing ejector and the inflow hole to facilitate injection molding.

[0011] As a further improvement to this utility model, the bottom wall of the inflow channel has an arc-shaped structure.

[0012] As a further improvement to this utility model, the output end of the gating channel is aligned with the inflow groove, the cutting edge is located below the output end of the gating channel, and the width of the cutting edge is wider than the width of the output end of the gating channel.

[0013] As a further improvement to this utility model, the shearing top rod is generally shaped like a circle at the top and a circle at the bottom, with the lower side of the shearing top rod abutting against a top plate and the upper side of the shearing top rod abutting against the product.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model provides a shearing component on the side of the gate runner. By raising the shearing push rod inside the inlet hole, the blade can perfectly separate the product from the gate during the rising process.

[0016] This invention, through the shearing ejector pins used to lift the top plate, can not only remove the gate but also, in conjunction with other ejector pins, demold the product. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0021] The names represented by the part numbers in the three schematic diagrams above are as follows:

[0022] 1. Upper mold;

[0023] 2. Lower mold;

[0024] 3. Injection runner; 31. Feed port; 32. Injection gate; 33. Sprue runner;

[0025] 4. Shearing assembly; 41. Inlet hole; 42. Shearing top rod; 421. Blade; 422. Inlet groove. Detailed Implementation

[0026] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] The present invention provides the following embodiments:

[0028] An injection mold for automatically removing gates, comprising:

[0029] Upper mold 1 and lower mold 2, with a cavity for the injection molded product between the upper mold 1 and the lower mold 2;

[0030] Injection runner 3 is used for injection molding inside the cavity. The injection runner 3 includes a feed port 31 for feeding material and two sets of injection ports 32 connected to the feed port 31. The lower mold 2 below the injection port 32 is provided with a sprue runner 33 connected to the cavity.

[0031] A shearing assembly 4 is disposed on the side of the gate runner 33 for removing the gate. The shearing assembly 4 includes an inlet hole 41 opened in the lower mold 2 and a shearing ejector 42 inserted into the inlet hole 41. The shearing ejector 42 has a relatively sharp cutting edge 421 on the side near the gate runner 33. By setting the shearing assembly 4 on the side of the gate runner 33, the shearing ejector 42 rises in the inlet hole 41, so that the cutting edge 421 can perfectly separate the product and the gate during the rising process.

[0032] The gate runner 33 has an overall funnel-shaped structure, and the output end of the gate runner 33 is set as a flat rectangular outlet. The funnel-shaped gate runner 33 facilitates product injection molding, and at the same time, the flat rectangular outlet makes the connection between the product and the gate a long and thin structure, which facilitates the cutting edge 421 to cut the connection.

[0033] The shear ejector pin 42 has an inflow groove 422 on the side near the gate runner 33. The inflow groove 422 has a structure that is wider at the bottom and narrower at the top. A gap is left between the top of the shear ejector pin 42 and the inflow hole 41 to facilitate injection molding. The bottom wall of the inflow groove 422 has an arc-shaped structure, which facilitates the injection of material.

[0034] The output end of the gate runner 33 is aligned with the inlet groove 422. The cutting edge 421 is located below the output end of the gate runner 33. After injection molding, the shearing ejector pin drives the cutting edge 421 upward to complete the gate shearing. The width of the cutting edge 421 is wider than the width of the output end of the gate runner 33. The wider cutting edge 421 can easily complete the gate shearing.

[0035] The shearing ejector 42 is generally round at the bottom and round at the top. The lower side of the shearing ejector 42 abuts against the top plate, and the upper side of the shearing ejector 42 abuts against the product. When the top plate drives the other ejector pins to push the product upward, it also drives the shearing ejector pins upward. At this time, the cutting edge 421 is upward, which can complete the removal of the gate at the same time as pushing out the product. The whole process is very convenient and quick, reducing subsequent steps and manual labor, and greatly improving work efficiency.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic gate removal injection mold characterized by, include: The upper mold (1) and the lower mold (2) are provided, and the cavity of the injection molded product is left between the upper mold (1) and the lower mold (2); The injection runner (3) is used to inject the molded cavity. The injection runner (3) includes a feed port (31) for feeding material and two sets of injection ports (32) connected to the feed port (31). The lower mold (2) below the injection port (32) is provided with a gating runner (33) connected to the molded cavity. A shearing assembly (4) is provided on the side of the gate runner (33) for removing the gate. The shearing assembly (4) includes an inlet hole (41) opened in the lower mold (2) and a shearing ejector (42) inserted into the inlet hole (41). The shearing ejector (42) has a relatively sharp cutting edge (421) on the side near the gate runner (33).

2. The injection mold for automatically removing gates according to claim 1, characterized in that: The gating channel (33) has an overall funnel-shaped structure, and the output end of the gating channel (33) is set as a flat rectangular outlet.

3. The injection mold for automatically removing gates according to claim 2, characterized in that: The shearing ejector (42) has an inflow groove (422) on the side near the gate runner (33). The inflow groove (422) has a structure that is wider at the bottom and narrower at the top. A gap is left between the top of the shearing ejector (42) and the inflow hole (41) to facilitate injection molding.

4. The injection mold for automatically removing gates according to claim 3, characterized in that: The bottom wall of the inflow channel (422) has an arc-shaped structure.

5. The injection mold for automatically removing gates according to claim 4, characterized in that: The output end of the gating channel (33) is aligned with the inflow groove (422), the knife edge (421) is located below the output end of the gating channel (33), and the width of the knife edge (421) is wider than the width of the output end of the gating channel (33).

6. The injection mold for automatically removing gates according to claim 5, characterized in that: The shearing rod (42) is generally round at the top and round at the bottom. The lower side of the shearing rod (42) abuts against the top plate, and the upper side of the shearing rod (42) abuts against the product.

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