Injection mold for automobile parts
By introducing a multi-point hot runner injection and cooling runner design into the injection mold, the problems of sprue and overflow were solved, achieving efficient and uniform injection molding production, and improving product quality and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WAKO HUAJIN NANO TECH SHANGHAI
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-05
AI Technical Summary
Existing injection molds are prone to producing sprue and overflow during the injection process, which affects product quality and is time-consuming and labor-intensive to operate.
An injection mold for automotive parts was designed, which uses No. 1 and No. 2 hot runner injection ports to directly inject into the cavity. Combined with tear-off grooves and overflow grooves, it avoids the generation of sprue head and prevents overflow. The injection quality is improved by using multi-point uniform injection and rapid cooling runners.
It effectively avoids the generation of material slag, improves the uniformity and efficiency of injection molding production, prevents overflow from affecting product quality, and achieves rapid cooling and efficient production.
Smart Images
Figure CN224197217U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of injection mold technology, specifically relating to an injection mold for automotive parts. Background Technology
[0002] Injection molds are tools used to manufacture plastic products. Molten plastic material is injected into the mold, and after cooling and solidification, it forms the desired shape. Injection molding is one of the most commonly used methods in plastic processing and is widely used in many industries such as automobiles, home appliances, electronic products, medical equipment, and packaging.
[0003] In existing injection molds, molten plastic is not directly injected into the cavity during the injection process. Instead, it needs to pass through a cold runner connecting the nozzle and the cavity before entering the mold. This can easily lead to sprue formation, which requires sprue cutting, a time-consuming and labor-intensive process. Furthermore, during injection, in order to ensure that the molten plastic fully fills the cavity, excessive injection is sometimes performed, resulting in overflow and affecting product quality. Utility Model Content
[0004] The purpose of this utility model is to provide an injection mold for automotive parts that has a simple structure and reasonable design in order to solve the above problems.
[0005] This utility model achieves the above objectives through the following technical solutions:
[0006] An injection mold for automotive parts includes a female mold body and a male mold body that mates with it. The female mold body has a female mold cavity in the middle, and the middle part of the female mold cavity is a female mold mating surface. A tearing groove is formed on the outside of the female mold cavity, and a plurality of overflow grooves are evenly formed on the outside of the tearing groove. A female mold cooling channel is formed inside the female mold body. The male mold body has a male mold cavity in the middle, and the inside of the male mold cavity is a male mold mating surface.
[0007] Preferably, a first hot runner injection port is provided on one side of the mating surface of the female mold, and several second hot runner injection ports are provided on the other side of the mating surface of the female mold, and several ejector pin slots are provided on the other side of the mating surface of the female mold.
[0008] Preferably, the four corners of the female mold body are provided with positioning and mating grooves, and two female mold core slots are provided in the middle of the female mold mating surface.
[0009] Preferably, positioning and mating protrusions are fixedly installed at the four corners of the male mold body, and a first male mold cooling channel and a second male mold cooling channel are opened inside the male mold body.
[0010] Preferably, two male mold core slots are symmetrically provided on one side of the male mold mating surface.
[0011] Preferably, the No. 1 male mold cooling channel and the No. 2 male mold cooling channel are distributed vertically at 90 degrees, and the No. 1 male mold cooling channel and the No. 2 male mold cooling channel are not connected, and both the No. 1 male mold cooling channel and the No. 2 male mold cooling channel are connected to the circulating cooling water tank through flexible hoses.
[0012] The beneficial effects of this utility model are as follows: This utility model directly injects molten material into the cavity through the No. 1 hot runner injection port, eliminating the need for the cold runner section connecting the nozzle and the cavity in traditional molds, effectively avoiding the generation of sprue head, eliminating the need to cut the sprue head, saving time and effort, and the multiple hot runner injection ports achieve multi-point uniform injection of liquid material, improving the uniformity during injection molding production, and the opening of tear groove and overflow groove prevents the problem of product quality degradation caused by overflow. Attached Figure Description
[0013] Figure 1 This is a three-dimensional view of the master mold of this utility model;
[0014] Figure 2 This is a side sectional view of the master mold of this utility model;
[0015] Figure 3 This is a three-dimensional drawing of the public mold of this utility model;
[0016] Figure 4 This is a front sectional view of the public mold of this utility model.
[0017] In the diagram: 1. Female mold body; 2. First hot runner injection port; 3. Positioning groove; 4. Female mold cooling channel; 5. Tear-off groove; 6. Overflow groove; 7. Female mold cavity; 8. Female mold core slot; 9. Second hot runner injection port; 10. Ejector pin slot; 11. Female mold mating surface; 12. Male mold body; 13. First male mold cooling channel; 14. Male mold core slot; 15. Male mold cavity; 16. Male mold mating surface; 17. Positioning protrusion; 18. Second male mold cooling channel. Detailed Implementation
[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.
[0019] Example
[0020] Please see Figure 1 , Figure 2 and Figure 3An injection mold for automotive parts includes a female mold body 1 and a male mold body 12 that mates with it. The female mold body 1 has a female mold cavity 7 in the middle, and the middle of the female mold cavity 7 is a female mold mating surface 11. The female mold cavity 7 has a tearing groove 5 on the outside, and several overflow grooves 6 are evenly distributed on the outside of the tearing groove 5. The female mold body 1 has a female mold cooling channel 4 inside. The male mold body 12 has a male mold cavity 15 in the middle, and the inside of the male mold cavity 15 is a male mold mating surface 16. A first hot runner injection port 2 is opened on one side of the female mold mating surface 11, and several second hot runner injection ports 9 are opened on the other side of the female mold mating surface 11. Several ejector pin slots 10 are opened on the other side of the female mold mating surface 11. Positioning mating grooves 3 are opened at the four corners of the female mold body 1. Two female mold core slots 8 are opened in the middle of the female mold mating surface 11.
[0021] In use, the female mold mating surface 11 is used to mate with the male mold mating surface 16. The overflow groove 6 is used to allow excess liquid to overflow, preventing excess liquid from affecting the quality of the product. The tearing groove 5 is used for tearing the edges, which facilitates the removal of burrs and excess overflow solidified material from the product edges, thus improving the quality of the product. The female mold cooling channel 4 is used for the transportation of cooling water, realizing the rapid cooling of the mold. The first hot runner injection port 2 and the second hot runner injection port 9 are used for the injection of liquid.
[0022] Please see Figure 3 and Figure 4 The male mold body 12 has positioning and mating protrusions 17 fixedly installed at its four corners. The male mold body 12 has a first male mold cooling channel 13 and a second male mold cooling channel 18. Two male mold core slots 14 are symmetrically opened on one side of the male mold mating surface 16. The first male mold cooling channel 13 and the second male mold cooling channel 18 are distributed vertically at ninety degrees. The first male mold cooling channel 13 and the second male mold cooling channel 18 are not connected. Both the first male mold cooling channel 13 and the second male mold cooling channel 18 are connected to the circulating cooling water tank through hoses.
[0023] In use, the positioning and mating protrusion 17 is used to mate with the positioning and mating groove 3 to achieve positioning and mating between the female mold body 1 and the male mold body 12. The first male mold cooling channel 13 and the second male mold cooling channel 18 are used for the transportation of cooling water to achieve rapid cooling of the mold.
[0024] It should be noted that, in the use of this type of automotive part injection mold, the required mold core is first inserted into the corresponding male mold core slot 14. The first male mold cooling channel 13 and the second male mold cooling channel 18 are connected to the circulating cooling water tank through hoses. At the same time, the female mold cooling channel 4 is also connected to the circulating cooling water tank through hoses. Then, the female mold body 1 and the male mold body 12 are closed. During the mold closing process, the precise positioning between the female mold body 1 and the male mold body 12 is achieved through the positioning engagement protrusion 17 and the positioning engagement groove 3. At this time, the molten material is injected evenly at multiple points through the first hot runner injection port 2 and the second hot runner injection port 9, improving the injection molding quality. The molten material is injected through the first hot runner... The injection port 2 and the second hot runner injection port 9 directly inject the material into the female mold cavity 7 and the male mold cavity 15. Excess material enters the tear groove 5 and the overflow groove 6, realizing the automatic overflow of excess material and avoiding the impact of excess material on product quality. After injection, the water pump in the circulating water tank delivers cooling water through hoses to the female mold cooling channel 4, the first male mold cooling channel 13 and the second male mold cooling channel 18. This drives the heat on the female mold body 1 and the male mold body 12 back to the circulating water tank, realizing the rapid cooling of the female mold body 1 and the male mold body 12 and improving the product molding efficiency. After molding, the mold is opened, the product is taken out, and the injection molding production of the product is completed.
[0025] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. An injection mold for automotive parts, comprising a female mold body (1) and a male mold body (12) mating therewith, characterized in that: The female mold body (1) has a female mold cavity (7) in the middle, and the middle of the female mold cavity (7) is the female mold mating surface (11). The female mold cavity (7) has a tearing groove (5) on the outside, and several overflow grooves (6) are evenly provided on the outside of the tearing groove (5). The female mold body (1) has a female mold cooling channel (4) inside. The male mold body (12) has a male mold cavity (15) in the middle, and the inside of the male mold cavity (15) is the male mold mating surface (16).
2. The injection mold for automotive parts according to claim 1, characterized in that: A first hot runner injection port (2) is provided on one side of the female mold mating surface (11), and several second hot runner injection ports (9) are provided on the other side of the female mold mating surface (11). Several ejector pin slots (10) are provided on the other side of the female mold mating surface (11).
3. The injection mold for automotive parts according to claim 1, characterized in that: The master mold body (1) has positioning and fitting grooves (3) at its four corners, and two master mold core slots (8) are opened in the middle of the master mold fitting surface (11).
4. The injection mold for automotive parts according to claim 1, characterized in that: The male mold body (12) is fixedly installed with positioning and mating protrusions (17) at its four corners, and a first male mold cooling channel (13) and a second male mold cooling channel (18) are opened inside the male mold body (12).
5. The injection mold for automotive parts according to claim 1, characterized in that: Two male mold core slots (14) are symmetrically opened on one side of the male mold mating surface (16).
6. The injection mold for automotive parts according to claim 4, characterized in that: The No. 1 male mold cooling channel (13) and the No. 2 male mold cooling channel (18) are vertically distributed at ninety degrees, and the No. 1 male mold cooling channel (13) and the No. 2 male mold cooling channel (18) are not connected. Both the No. 1 male mold cooling channel (13) and the No. 2 male mold cooling channel (18) are connected to the circulating cooling water tank through hoses.