An injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded.

Abstract

This utility model discloses an injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded. It includes a base, a mold foot on top of the base, an ejector pin cover plate at the bottom of the mold foot, a male mold core on a moving mold plate, a first cooling system outside the male mold core, a female mold core above a fixed mold plate, a cavity plate inside the fixed mold plate, and a second cooling system inside the cavity plate with a second cooling pipe located inside the cavity plate. The first cooling system of this utility model cools the male mold core, while the second cooling system cools the female mold core. This effectively reduces the temperature of the mold during operation, minimizing thermal stress and fatigue caused by high temperatures, while also accelerating the molding speed of automotive trim parts. By shortening the cooling time, the production of injection molded parts can be completed quickly, thereby reducing production costs.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded. Background Technology

[0002] Injection molds are widely used in the production of plastic parts and products. They involve injecting fully molten plastic material, stirred by a screw at a specific temperature, into a mold cavity under high pressure, and then cooling and solidifying to obtain the molded product. This method is suitable for the mass production of complex-shaped parts and is one of the important processing methods. Injection molds play a crucial role in the manufacturing of automotive trim parts because they can efficiently produce plastic products with complex shapes and high precision. These plastic products are typically used for interior and exterior automotive trim, meeting the production needs of the automotive manufacturing industry.

[0003] In the existing injection molding process for automotive trim parts, molten plastic needs to be rapidly cooled and solidified after being injected into the mold. Automotive trim parts typically require stable dimensional accuracy and surface finish, which necessitates ensuring uniform mold temperature during the cooling process to avoid defects such as warping and deformation caused by uneven cooling.

[0004] For example, the secondary injection molding mold for automotive trim parts disclosed in patent CN218615184U does not have the function of rapid and uniform cooling molding. Therefore, the cooling process occupies most of the injection molding cycle. If the mold cannot cool quickly, it will directly lead to the extension of the production cycle, thereby affecting the overall production efficiency. Moreover, uneven cooling will lead to uneven stress distribution inside the injection molded part, which may cause quality defects such as warping and deformation. This will directly affect the appearance, dimensional accuracy and assembly performance of automotive trim parts.

[0005] Therefore, it is necessary to invent an injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide an injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded, thereby solving the problem of the lack of rapid and uniform cooling and molding in the existing technology.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded, comprising a base, a male mold core, a first cooling system, a female mold core, and a second cooling system. A mold foot is provided above the base, and an ejector pin cover is provided at the bottom of the inner end of the mold foot. A fixed mold plate is provided above the mold foot, and a top plate is provided above the fixed mold plate. A movable mold plate is provided below the top plate, and a male mold core is provided on the movable mold plate. A first cooling system is provided outside the male mold core, and the first cooling system includes a first cooling pipe wound around the outer wall of the male mold core. A female mold core is provided above the fixed mold plate, and a cavity plate is provided at the bottom of the female mold core. The cavity plate is placed inside the fixed mold plate, and a second cooling system is provided inside the cavity plate. The second cooling system includes a second cooling pipe located inside the cavity plate.

[0008] Preferably, a cylinder is provided above the ejector cover plate. There are four cylinders, and the output ends of the four cylinders are connected to the ejector cover plate. This enables the ejector cover plate to be raised and lowered stably. This helps to push the ejector cover plate and the ejector body below it out by the driving force of the cylinder after injection molding, so that the molded product can be easily demolded from the mold core.

[0009] Preferably, an ejector body is provided above the ejector cover plate, and multiple ejector bodies are provided. The multiple ejector bodies extend through the cavity plate to ensure that the product can be subjected to uniform and sufficient ejection force during the demolding process, so as to separate smoothly from the mold core.

[0010] Preferably, a guide post is provided below the top plate, passing through the moving template and extending to its bottom. A guide hole is provided at the contact position between the guide post and the fixed template. The guide post and the guide hole are slidably connected. The cooperation between the guide post and the guide hole can limit the offset and shaking of the mold during the mold closing and opening process.

[0011] Preferably, the top of the top plate is provided with a pouring gate, and there are two pouring gates. The male mold core is provided below the two pouring gates respectively. The discharge end of the pouring gate is connected and communicates with the feed end of the male mold core, so that the injection material can be evenly introduced from the pouring gate into the male mold core and the female mold core.

[0012] Preferably, the first cooling pipe has a first water inlet at its inlet end and a first water outlet at its outlet end, which ensures the smooth flow and circulation of the cooling medium, thereby improving cooling efficiency and the service life of the mold.

[0013] Preferably, a female mold core is provided directly below the male mold core, and the male mold core and the female mold core are joined to form a complete mold cavity so that the injection molding material can be filled into it and formed into the desired product during the injection molding process.

[0014] Preferably, the second cooling pipe has a second water inlet at its inlet end and a second water outlet at its outlet end. The second water inlet and the second water outlet introduce cooling medium into the second cooling pipe, and the medium is carried away from the mold through circulation.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] 1. This utility model is provided with two male mold cores and two female mold cores. The injection mold can produce two automotive trim parts at the same time in one injection cycle, which helps to shorten the production cycle of automotive trim parts and thus significantly improves production efficiency.

[0017] 2. The first cooling system of this utility model can cool down the male mold core, while the second cooling system can cool down the female mold core. This can effectively reduce the temperature of the mold during operation, reduce the thermal stress and thermal fatigue caused by high temperature, and accelerate the molding speed of automotive trim parts. By shortening the cooling time, the production of injection molded parts can be completed quickly, thereby reducing production costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall main structure of this utility model;

[0020] Figure 3 This is a three-dimensional cross-sectional view of the moving template of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the No. 1 cooling system of this utility model;

[0022] Figure 5 This is a three-dimensional cross-sectional view of the template of this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the second cooling system of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Base; 2. Mold foot; 3. Ejector pin cover plate; 4. Cylinder; 5. Ejector pin body; 6. Fixed mold plate; 7. Top plate; 8. Moving mold plate; 9. Guide pillar; 10. Guide hole; 11. Sprue; 12. Male mold core; 13. Cooling system No. 1; 1301. Cooling pipe No. 1; 1302. Water inlet No. 1; 1303. Water outlet No. 1; 14. Female mold core; 15. Cavity plate; 16. Cooling system No. 2; 1601. Cooling pipe No. 2; 1602. Water inlet No. 2; 1603. Water outlet No. 2. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] This utility model provides, for example Figure 1-6 The image shows an injection mold for automotive trim parts that allows for rapid and uniform cooling and molding. It includes a base 1, a male mold core 12, a primary cooling system 13, a female mold core 14, and a secondary cooling system 16. A mold base 2 is positioned above the base 1. An ejector pin cover 3 is located at the bottom of the mold base 2. A fixed mold plate 6 is positioned above the mold base 2. A top plate 7 is positioned above the fixed mold plate 6. A movable mold plate 8 is positioned below the top plate 7. The male mold core 12 is positioned on the movable mold plate 8. The primary cooling system 13 is located outside the male mold core 12. The primary cooling system 13 includes a primary cooling pipe 1301, which is wound around the male mold core. The outer wall of the core 12 has a female core 14 above the fixed template 6, a cavity plate 15 at the bottom of the female core 14, a cylinder 4 above the ejector cover plate 3, and four cylinders 4 are provided. The output ends of the four cylinders 4 are connected to the ejector cover plate 3. An ejector body 5 is provided above the ejector cover plate 3, and multiple ejector bodies 5 are provided. Multiple ejector bodies 5 extend through into the cavity plate 15. The cavity plate 15 is placed inside the fixed template 6. A second cooling system 16 is provided inside the cavity plate 15. The second cooling system 16 includes a second cooling pipe 1601, which is located inside the cavity plate 15.

[0028] A guide post 9 is provided below the top plate 7, passing through the moving template 8 and extending to its bottom. A guide hole 10 is provided at the contact position between the guide post 9 and the fixed template 6. The guide post 9 and the guide hole 10 are slidably connected. A pouring port 11 is provided at the top of the top plate 7. There are two pouring ports 11. A male mold core 12 is provided below the two pouring ports 11. The discharge end of the pouring port 11 is connected to the inlet end of the male mold core 12.

[0029] On the fixed template 6, we have made corresponding guide holes 10 for each guide post 9 to ensure that the guide post 9 can slide smoothly in the guide hole 10, and to ensure that the relative movement between the top plate 7 and the moving template 8 is more stable. This avoids the offset and shaking of the male mold core 12 and the female mold core 14 during the mold closing and opening process. In addition, the two pouring ports 11 and the male mold core 12 and female mold core 14 can produce two automotive trim parts at the same time in one injection cycle, which effectively improves the production efficiency of automotive trim parts.

[0030] The first cooling pipe 1301 has a first water inlet 1302 at its inlet end and a first water outlet 1303 at its outlet end. The female mold core 14 is located directly below the male mold core 12. The second cooling pipe 1601 has a second water inlet 1602 at its inlet end and a second water outlet 1603 at its outlet end.

[0031] The No. 1 cooling pipe 1301 and the No. 2 cooling pipe 1601 allow the cooling medium (such as water or coolant) to circulate in the mold, carrying away the heat generated by the male mold core 12 and the female mold core 14 during the injection molding process. This not only achieves a fast and uniform cooling and molding effect for automotive trim parts, but also removes the heat generated by the male mold core 12 and the female mold core 14 during the injection molding process, preventing the mold from overheating and causing product deformation or damage.

[0032] Working principle of this utility model:

[0033] Refer to the instruction manual appendix Figure 1-2 When using this utility model, the moving platen 8 is first moved downward by an external driving mechanism such as a hydraulic or electric mechanism until the male mold core 12 and the female mold core 14 are in close contact to form a complete mold cavity. During the mold closing process, the sliding connection between the guide post 9 and the guide hole 10 ensures the smooth movement of the mold and avoids deviation and shaking. Then, through the pouring port 11 on the top plate 7, the molten injection material is injected into the cavity of the male mold core 12 and the female mold core 14. The injection material fills the cavity of the male mold core 12 and the female mold core 14 under pressure until the entire cavity is filled and the required thickness and shape are achieved.

[0034] Refer to the instruction manual appendix Figure 3-6When using this invention, after injection molding is completed, the No. 1 cooling system 13 and the No. 2 cooling system 16 are immediately activated. The cooling medium (such as water or coolant) can remove the heat generated by the male mold core 12 and the injection material during the injection molding process through the No. 1 cooling pipe 1301, and can remove the heat generated by the female mold core 14 and the injection material during the injection molding process through the No. 2 cooling pipe 1601. Since the female mold core 14 is tightly fitted to the cavity plate 15, the heat generated by the female mold core 14 during the injection molding process can be quickly transferred to the inside of the cavity plate 15. The No. 2 cooling system 1601... Since the cooling tube 1601 is inside the cavity plate 15, it can directly absorb the heat and carry it away through the circulation of the cooling medium, thereby achieving efficient heat conduction and heat dissipation. However, the cooling process needs to continue for a period of time to ensure that the injection molding material is fully cured and reaches the required strength and hardness. After the injection molding material is fully cured, the male mold core 12 and the female mold core 14 are opened, and the cylinder 4 is activated to move the ejector cover plate 3 and the ejector body 5 upward. The ejector body 5 penetrates the cavity plate 15 and ejects the molded automotive trim from the female mold core 14.

Claims

1. An injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded, comprising a base (1), a male mold core (12), a first cooling system (13), a female mold core (14), and a second cooling system (16), characterized in that: A mold foot (2) is provided above the base (1). An ejector pin cover plate (3) is provided at the bottom of the inner part of the mold foot (2). A fixed template (6) is provided above the mold foot (2). A top plate (7) is provided above the fixed template (6). A moving template (8) is provided below the top plate (7). A male mold core (12) is provided on the moving template (8). A first cooling system (13) is provided outside the male mold core (12). The first cooling system (13) includes a first cooling pipe (1301). The first cooling pipe (1301) is wound around the outer wall of the male mold core (12). The female mold core (14) is provided above the fixed template (6). The cavity plate (15) is provided at the bottom of the female mold core (14). The cavity plate (15) is placed inside the fixed template (6). The cavity plate (15) is provided with a second cooling system (16). The second cooling system (16) includes a second cooling pipe (1601). The second cooling pipe (1601) is located inside the cavity plate (15).

2. The injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded according to claim 1, characterized in that: A cylinder (4) is provided above the ejector cover plate (3). There are four cylinders (4), and the output ends of the four cylinders (4) are connected to the ejector cover plate (3).

3. The injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded according to claim 1, characterized in that: A pin body (5) is provided above the pin cover plate (3), and multiple pin bodies (5) are provided, with multiple pin bodies (5) extending through into the cavity plate (15).

4. The injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded according to claim 1, characterized in that: A guide post (9) is provided below the top plate (7) to pass through the moving template (8) and extend to its bottom. A guide hole (10) is provided at the contact position between the guide post (9) and the fixed template (6). The guide post (9) and the guide hole (10) are slidably connected.

5. The injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded according to claim 4, characterized in that: The top plate (7) is provided with a pouring port (11), and there are two pouring ports (11). The male mold core (12) is provided below the two pouring ports (11). The discharge end of the pouring port (11) is connected to the feed end of the male mold core (12).

6. The injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded according to claim 1, characterized in that: The first cooling pipe (1301) has a first water inlet (1302) at its inlet end and a first water outlet (1303) at its outlet end.

7. The injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded according to claim 5, characterized in that: The female mold core (14) is provided directly below the male mold core (12).

8. The injection mold for automotive trim parts that can be rapidly and uniformly cooled and molded according to claim 1, characterized in that: The second cooling pipe (1601) has a second water inlet (1602) at its inlet end and a second water outlet (1603) at its outlet end.

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