Plastic injection dustproof mold for automobile part production

Abstract

The application relates to the technical field of automobile part production, in particular to a plastic injection dustproof mold for automobile part production, which comprises an upper fixed plate and a cavity installed below the upper fixed plate, a core is arranged below the cavity, the upper part of a guide column penetrates the inner part of the four corners of the cavity and the upper fixed plate, a pouring gate is arranged in the middle of the upper fixed plate and the cavity, and a shielding assembly is connected to the outer side between the upper fixed plate and the core to prevent dust and impurities in the air from contacting the cavity and the core. The plastic injection dustproof mold for automobile part production is used with the dustproof net, so that fine impurities and dust in the air can be prevented from contacting the cavity, the core and the transparent plastic product during the closing and opening of the injection mold, dust and pollution can be prevented, the light transmittance and the mechanical property of the finished product are improved, the use in the later stage is not affected, and the qualified rate of the product produced by the injection mold is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts manufacturing technology, specifically to a plastic injection dustproof mold for automotive parts manufacturing. Background Technology

[0002] When recycling some plastic waste, the plastic waste can be processed and then produced into automotive parts through injection molding. The use of injection molding can not only improve the quality and production efficiency of automotive parts, affecting the performance and cost of the whole vehicle, but also facilitate the recycling of plastic waste. In the injection molding process of transparent plastic waste, such as when producing automotive lamp covers, transparent plastic waste has extremely low tolerance to dust and micro-debris. Fine impurities not only damage light transmittance, but also reduce mechanical properties, causing batch scrap and affecting the cleanliness of the appearance. Once transparent plastic is contaminated, defects such as fogging, scratches, and black spots will appear, directly affecting the optical performance and use effect of the product. For example, the patent disclosed in the prior art with publication number "CN120269772B" is entitled "A Precision Injection Mold for Automotive Plastic Parts." It discloses a sealing mechanism that allows the sealing gasket inside the sealing sleeve to slide within the frame groove. By slightly lifting the upper cavity, gas can be easily injected into the upper and lower cavities. By injecting alternating hot and cold gas, the molded parts inside the upper and lower cavities can achieve initial demolding through the principle of thermal expansion and contraction. Excess gas is then transported through a gas supply pipe to through-grooves inside the upper and lower cavities, where the demolding mechanism inside the upper cavity and through-grooves can perform demolding work, allowing for further demolding. (The text repeats itself here, so the translation will only include the first instance.) The patent application published in the technology publication number "CN116834213B" is entitled "An Injection Molding Mold for Automotive Plastic Parts and Its Molding Method". It discloses that when the moving mold leaves the fixed mold with the injection-molded lamp cover, the moving mold will drive the drive component to move. At this time, the drive component will drive the cleaning component to move. The movement of the drive component and the rotation of the rotating cylinder are synchronized. The drive component drives the cleaning component to move, so that the cleaning component can clean the scrap material stuck to the fixed mold. When the moving mold re-fits the fixed mold for injection molding, the moving mold will reset the drive component. At this time, the maintenance component will be driven by the drive component to rotate, thereby cleaning the cleaning component and preventing the material from sticking to the cleaning component.

[0003] When the injection mold in the above-mentioned prior art is in use, although the cleaning component can clean the scraps adhered to the fixed mold, which can avoid the contamination of transparent plastics and affect the optical properties of the products. However, since the cavity and the core are in an exposed state, during the process of mold closing and mold opening, there will still be fine impurities, dust, etc. contacting the transparent plastic products, which will then reduce the light transmittance and mechanical properties of the finished products and affect the later use. Therefore, the qualified rate of the products produced by the injection mold will be reduced. So, we propose a plastic injection dust-proof mold for automotive parts production to solve the problems mentioned above. Summary of the Invention

[0004] The purpose of the present invention is to provide a plastic injection dust-proof mold for automotive parts production to solve the problem in the background technology that when the existing injection mold is in use, although the cleaning component can clean the adhered scraps of the fixed mold, which can avoid the contamination of transparent plastics and affect the optical properties of the products. However, since the cavity and the core are in an exposed state, during the process of mold closing and mold opening, there will still be fine impurities, dust, etc. contacting the transparent plastic products, which will then reduce the light transmittance and mechanical properties of the finished products and affect the later use. Therefore, the qualified rate of the products produced by the injection mold will be reduced.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A plastic injection dust-proof mold for automotive parts production includes an upper fixing plate and a cavity installed below it. A core is arranged below the cavity, and a bearing plate is installed below the core. A lower fixing plate is installed below the bearing plate. Guide columns are fixed inside the four corners of the core, and the upper parts of the guide columns penetrate through the four corners inside the cavity and the upper fixing plate. A pouring port is installed through the middle inside of the upper fixing plate and the cavity. A shielding component is connected to the outside between the upper fixing plate and the core to prevent external dust and impurities from contacting the cavity and the core.

[0006] Preferably, a thimble component is installed above the lower fixing plate, and the upper part of the thimble component penetrates through the bearing plate and the inside of the core for demolding operations.

[0007] Preferably, a bellows for sealing and shielding is fixedly penetrated through the outer side of the upper part of the guide column, and the lower end of the bellows is hermetically connected to the upper fixing plate.

[0008] Preferably, the shielding component includes an upper fixing frame fixed on the outside of the upper fixing plate, and a dust-proof net is installed below the upper fixing frame. A lower fixing frame is fixed on the outside of the core, and the lower surface of the dust-proof net is connected to the upper surface of the lower fixing frame through a magic tape component.

[0009] Preferably, both the upper fixing frame and the lower fixing frame are arranged in a "square frame" shape, and the cross-section of the upper fixing frame is arranged in an inverted "U" shape.

[0010] Preferably, a vertical rod is rotatably mounted on the upper surface of the upper fixing plate, and a dust cover is connected to the outer side of the vertical rod, and a pouring port is fitted to the bottom of the dust cover.

[0011] Preferably, a sleeve block is fixed on the left side of the dust cover, and a vertical rod is installed through the hollow sleeve block. Protrusions are symmetrically installed inside the sleeve block, and the protrusions are engaged and slidably connected with the grooves opened on the outer side of the vertical rod. At the same time, a return spring is installed in the groove opened on the outer side of the vertical rod, and the top of the return spring is connected to the protrusion.

[0012] Preferably, a liquid storage airbag for storing lubricating oil is installed in the upper fixed plate located on the left side of the dust cover, and the front and rear sides of the liquid storage airbag are connected to the delivery pipe installed inside the upper fixed plate through pipes.

[0013] Preferably, the upper fixing plate corresponding to the outer side of the guide post is equipped with a ring tube, a guide ball and a sponge layer in sequence from top to bottom, and the ring tube is located below the corrugated pipe, and the sponge layer is arranged in a ring shape. The two ends of the delivery pipe are respectively connected to the two ring tubes, and the nozzle is installed on the inner side of the ring tube.

[0014] Preferably, the upper four sides of the lower fixed frame are slotted and equipped with rotating rods, and symmetrical push rods are fixed through the outer side of the rotating rods. The push rods are arranged in a "T" shape, and spiral springs are nested and connected to the outer sides of both ends of the rotating rods. Connecting ropes are wound and connected to the outer sides of both ends of the rotating rods, and the upper end of the connecting ropes is connected to the upper fixed frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This dustproof plastic injection mold for automotive parts production can prevent fine impurities and dust from contacting the cavity, core, and transparent plastic products, thus effectively preventing dust and pollution, thereby improving the light transmittance and mechanical properties of the finished product and avoiding affecting its later use. Therefore, it improves the pass rate of products produced by injection molds. The specific details are as follows: (1) By using dustproof nets, the injection mold can avoid contact between external fine impurities and dust and the cavity, core and transparent plastic products during the mold closing and opening process. Therefore, it can effectively prevent dust and pollution, thereby improving the light transmittance and mechanical properties of the finished product and avoiding affecting its later use. Thus, it improves the qualification rate of products produced by injection molds. (2) At the same time, a corrugated pipe is installed on the outside of the guide post to further prevent dust and foreign objects from entering the gap between the upper fixing plate and the guide post. The dust cover plate covers the top of the gate to prevent external dust and impurities from entering the gate when the injection mold is not in use. Simultaneously, the compression of the liquid storage airbag by the dust cover allows the lubricating oil inside the airbag to be sprayed onto the outer surface of the guide post through the ring pipe, lubricating the guide post and further reducing the friction between the guide post and the guide ball, thereby increasing the service life of the guide post. It also ensures that the guide post performs stable guiding operations, avoiding misalignment between the cavity and the core, thus further improving the qualification rate of products produced by injection molds.

[0016] (3) When the cavity and the core are closed, the rotating rod is automatically driven to rotate by the stored force of the spiral spring. This causes the rotating rod to drive the "T"-shaped push rod to rotate outward, so that the push rod applies an outward push force to the dustproof net, which makes it easy to unfold the dustproof net outward, and avoids the dustproof net from piling up and affecting the ventilation of the internal mesh. Therefore, it will not affect the air flow around the injection mold, and thus will not affect the heat dissipation of the injection mold. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the left-side structure of the present invention; Figure 3 This is a schematic cross-sectional view of the dustproof net structure of the present invention; Figure 4 This is a schematic diagram of the cavity structure of the present invention from a bottom view; Figure 5 This is a schematic diagram of the three-dimensional structure of the lower fixed frame of the present invention; Figure 6 This is a top view of the fixed plate structure of the present invention; Figure 7 This is a cross-sectional view of the connection between the upper fixing plate and the guide post of the present invention; Figure 8 This is a schematic diagram of the separation structure of the upper fixing plate and guide post in this invention; Figure 9 This is a schematic diagram of the separation structure between the dust cover and the pouring gate of the present invention; Figure 10 This is a schematic cross-sectional view of the connection between the sleeve block and the vertical rod of the present invention; Figure 11 This is a schematic cross-sectional view of the bellows structure of the present invention.

[0018] In the diagram: 1. Upper fixing plate; 2. Guide post; 201. Corrugated pipe; 3. Cavity; 4. Core; 5. Bearing plate; 6. Lower fixing plate; 7. Ejector pin assembly; 8. Upper fixing frame; 9. Dustproof net; 10. Lower fixing frame; 11. Push rod; 12. Connecting rope; 13. Rotating rod; 131. Scroll spring; 14. Velcro assembly; 15. Sprue; 16. Dustproof cover; 161. Sleeve block; 162. Protrusion; 17. Liquid storage airbag; 18. Ring pipe; 19. Guide ball; 20. Conveying pipe; 21. Vertical rod; 22. Return spring; 23. Sponge layer. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-11 The present invention provides the following technical solution: Example 1: The dustproof plastic injection mold for automotive parts production in this example prevents external impurities and dust from contacting the cavity 3, core 4, and transparent plastic product during mold closing and opening. This effectively prevents dust and contamination, thereby improving the light transmittance and mechanical properties of the finished product and avoiding impacts on later use. Therefore, it increases the yield rate of products produced by the injection mold. For specific structure details, please refer to the attached diagram. Figures 1-3 and appendix Figures 6-11As shown, there is an upper fixing plate 1 and a cavity 3 installed below it. A core 4 is provided below the cavity 3, and a bearing plate 5 is installed below the core 4. A lower fixing plate 6 is installed below the bearing plate 5. Guide columns 2 are fixed inside the four corners of the core 4, and the upper parts of the guide columns 2 penetrate through the four corners inside the cavity 3 and the upper fixing plate 1. A pouring port 15 is installed through the middle inside of the upper fixing plate 1 and the cavity 3. A shielding component is connected to the outside between the upper fixing plate 1 and the core 4 to prevent external dust and impurities from contacting the cavity 3 and the core 4. A thimble component 7 is installed above the lower fixing plate 6, and the upper part of the thimble component 7 penetrates through the inside of the bearing plate 5 and the core 4 for demolding operations. A bellows 201 for sealing and shielding is fixedly penetrated outside the upper part of the guide column 2, and the lower end of the bellows 201 is hermetically connected to the upper fixing plate 1. The shielding component includes an upper fixing frame 8 fixed to the outside of the upper fixing plate 1. A dust-proof net 9 is installed below the upper fixing frame 8. A lower fixing frame 10 is fixed to the outside of the core 4, and the lower surface of the dust-proof net 9 is connected to the upper surface of the lower fixing frame 10 through a magic tape component 14. Both the upper fixing frame 8 and the lower fixing frame 10 are arranged in a "hui" character shape, and the cross-section of the upper fixing frame 8 is arranged in an inverted "U" shape.

[0021] A vertical rod 21 is rotatably installed on the upper surface of the upper fixing plate 1. A dust-proof cover plate 16 is connected to the outside of the vertical rod 21. The pouring port 15 is arranged in a fitting manner below the dust-proof cover plate 16. A sleeve block 161 is fixed to the left side of the dust-proof cover plate 16. The vertical rod 21 penetrates through the inside of the sleeve block 161 with a hollow interior. Convex blocks 162 are symmetrically installed inside the sleeve block 161, and the convex blocks 162 are in snap-fit sliding connection with the grooves opened on the outer side surface of the vertical rod 21. At the same time, a return spring 22 is installed in the groove opened on the outer side surface of the vertical rod 21, and the upper part of the return spring 22 is connected to the convex block 162. A liquid storage airbag 17 for storing lubricating oil is installed in a groove opened inside the upper fixing plate 1 on the left side of the dust-proof cover plate 16. Both the front and rear sides of the liquid storage airbag 17 are connected to a delivery pipe 20 installed inside the upper fixing plate 1 through pipes. Ring pipes 18, guide balls 19, and a sponge layer 23 are sequentially installed from top to bottom inside the upper fixing plate 1 corresponding to the outside of the guide column 2. The ring pipe 18 is located below the bellows 201, and the sponge layer 23 is arranged in a circular ring shape. The two ends of the delivery pipe 20 are respectively connected to the two ring pipes 18. Sprayers are installed inside the ring pipes 18.

[0022] First, move the entire injection mold into the working area. The corrugated pipe 201 installed on the outside of the guide pillar 2 further prevents dust and foreign objects from entering the gap between the upper fixed plate 1 and the guide pillar 2. The dust cover 16 covers the top of the sprue 15 to prevent external dust and impurities from entering the sprue 15 when the injection mold is not in use. Next, manually rotate the vertical rod 21 180°. The vertical rod 21, through the protrusion 162, drives the sleeve block 161 and the dust cover 16 to rotate together. When the dust cover 16 rotates directly above the liquid storage air bladder 17, the stored force of the return spring 22 automatically drives the protrusion 162 to move downwards within the groove on the outside of the vertical rod 21. The protrusion 162 then drives the sleeve block 161 and the dust cover... The plate 16 moves downwards together, causing the dust cover 16 to squeeze the liquid storage airbag 17. The lubricating oil in the liquid storage airbag 17 is transported to the ring pipe 18 through the delivery pipe 20. Then, the lubricating oil is sprayed onto the outer side of the guide post 2 through the nozzle on the inner side of the ring pipe 18 to lubricate the guide post 2 and the guide ball 19, further reducing the friction between the guide post 2 and the guide ball 19, thereby improving the service life of the guide post 2. At the same time, it can also ensure that the guide post 2 can perform stable guiding operations and avoid misalignment between the cavity 3 and the core 4, thereby further improving the qualification rate of the products produced by the injection mold. The sponge layer 23, which is arranged in a ring shape, can absorb and collect excess lubricating oil, preventing excess lubricating oil from dripping randomly and affecting the use of the injection mold.

[0023] Next, the sprue 15 is connected to an external conveying mechanism. An external electric push rod drives the upper fixed plate 1 downwards, which in turn moves the cavity 3 downwards. At this point, the dustproof net 9 is compressed and accumulated. When the cavity 3 moves downwards and comes into contact with the upper surface of the core 4, the movement of the upper fixed plate 1 stops. The recycled plastic waste is then cleaned and heated to melt. The conveying mechanism then injects the molten plastic into the sprue 15. The molten plastic then flows through the bottom of the sprue 15 into the core 4. After a period of cooling, the electric push rod drives the upper fixed plate 1 and the cavity 3 upwards, separating the cavity 3 from the molded product. Finally, the ejector pin assembly 7 ejects the molded product from the core 4, demolding it. Since this part is existing technology... Therefore, a detailed introduction is not provided here. Later, by opening the Velcro assembly 14 at a certain location, the lower end of the dustproof net 9 at that location can be lifted upwards, and then the molded product can be taken out. Thus, by using the dustproof net 9, the injection mold can avoid contact between external fine impurities and dust and the cavity 3, core 4, and transparent plastic products during the mold closing and opening process. Therefore, it can effectively prevent dust and pollution, thereby improving the light transmittance and mechanical properties of the finished product and avoiding affecting its later use. This improves the qualification rate of products produced by the injection mold, enabling the injection mold to produce transparent plastic products such as automotive headlight covers. After the use is completed, the dustproof net 9 can be lifted, and the cavity 3 and core 4 can be cleaned with external cleaning tools for the next use.

[0024] Example 2: The plastic injection molding dustproof mold for automotive parts production in this example, based on Example 1, can automatically unfold the dustproof mesh 9 outwards, preventing the dustproof mesh 9 from piling up and affecting the ventilation of the internal mesh. See attached diagram for the specific structure. Figures 1-5 As shown, the upper four sides of the lower fixed frame 10 are all slotted and equipped with rotating rods 13. The outer sides of the rotating rods 13 are symmetrically fixed with push rods 11. The push rods 11 are arranged in a "T" shape. The outer sides of both ends of the rotating rods 13 are nested with spiral springs 131. The outer sides of both ends of the rotating rods 13 are wound with connecting ropes 12. The upper end of the connecting ropes 12 is connected to the upper fixed frame 8.

[0025] During the mold closing process, the rotating rod 13 is automatically rotated by the stored force of the spiral spring 131. This causes the rotating rod 13 to drive the "T"-shaped push rod 11 to rotate outward, which in turn applies an outward pushing force to the dustproof net 9. This facilitates the outward unfolding of the dustproof net 9, preventing it from piling up and affecting the ventilation of the internal mesh. Therefore, it does not affect the airflow around the injection mold, and consequently, it does not affect the heat dissipation of the injection mold, thus completing a series of tasks.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plastic injection dustproof mold for automobile parts production, comprising an upper fixed plate (1) and a cavity (3) installed below it, wherein a core (4) is provided below the cavity (3), a support plate (5) is installed below the core (4), and a lower fixed plate (6) is installed below the support plate (5), characterized in that: Guide posts (2) are fixedly installed inside the four corners of the core (4). The upper parts of the guide posts (2) penetrate through the four corners inside the cavity (3) and the upper fixing plate (1). A pouring port (15) is installed through the middle parts inside the upper fixing plate (1) and the cavity (3). A shielding component is connected to the outside between the upper fixing plate (1) and the core (4) to prevent external dust and impurities from contacting the cavity (3) and the core (4).

2. The plastic injection dustproof mold for automotive parts production according to claim 1, characterized in that: A thimble component (7) is installed above the lower fixing plate (6). The upper part of the thimble component (7) penetrates through the inside of the carrier plate (5) and the core (4) for demolding operation.

3. The plastic injection dustproof mold for automobile parts production according to claim 1, characterized in that: A corrugated pipe (201) for sealing and shielding is fixedly installed through the outer side of the upper part of the guide post (2). The lower end of the corrugated pipe (201) is hermetically connected to the upper fixing plate (1).

4. A plastic injection dustproof mold for automotive parts production according to claim 1, characterized in that: The shielding component includes an upper fixing frame (8) fixed to the outside of the upper fixing plate (1). A dust-proof net (9) is installed below the upper fixing frame (8). A lower fixing frame (10) is fixed to the outside of the core (4). The lower part of the dust-proof net (9) is connected to the upper surface of the lower fixing frame (10) through a magic tape component (14).

5. A plastic injection dustproof mold for automotive parts production according to claim 4, characterized in that: Both the upper fixing frame (8) and the lower fixing frame (10) are arranged in a "hui" shape, and the cross-section of the upper fixing frame (8) is arranged in an inverted "U" shape.

6. A plastic injection dustproof mold for automotive parts production according to claim 3, characterized in that: A vertical rod (21) is rotatably installed on the upper surface of the upper fixing plate (1). A dust-proof cover plate (16) is connected to the outside of the vertical rod (21). The pouring port (15) is arranged in a fitting manner below the dust-proof cover plate (16).

7. A plastic injection dustproof mold for automotive parts production according to claim 6, characterized in that: A sleeve block (161) is fixed to the left side of the dust-proof cover plate (16). The vertical rod (21) penetrates through the inside of the sleeve block (161) with a hollow interior. Convex blocks (162) are symmetrically installed inside the sleeve block (161). The convex blocks (162) are in snap-fit sliding connection with the grooves formed on the outer side surface of the vertical rod (21). A return spring (22) is installed in the groove formed on the outer side surface of the vertical rod (21). The upper part of the return spring (22) is connected to the convex block (162).

8. A plastic injection dustproof mold for automotive parts production according to claim 7, characterized in that: A liquid storage airbag (17) for storing lubricating oil is installed in a groove inside the upper fixing plate (1) on the left side of the dust-proof cover plate (16). Both the front and rear sides of the liquid storage airbag (17) are connected to a delivery pipe (20) installed inside the upper fixing plate (1) through pipes.

9. A plastic injection dustproof mold for automobile parts production according to claim 8, characterized in that: An annular pipe (18), a guiding ball (19) and a sponge layer (23) are sequentially installed from top to bottom inside the upper fixing plate (1) corresponding to the outer side of the guide post (2). The annular pipe (18) is located below the corrugated pipe (201). The sponge layer (23) is arranged in a circular ring shape. Both ends of the delivery pipe (20) are connected to the two annular pipes (18). Nozzles are installed inside the annular pipe (18).

10. A plastic injection dustproof mold for automobile parts production according to claim 4, characterized in that: The upper four sides of the lower fixed frame (10) are all slotted and equipped with rotating rods (13), and push rods (11) are symmetrically fixed through the outer side of the rotating rods (13). The push rods (11) are arranged in a "T" shape. Both ends of the rotating rods (13) are nested with spiral springs (131). Both ends of the rotating rods (13) are wrapped with connecting ropes (12). The upper end of the connecting ropes (12) is connected to the upper fixed frame (8).

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