Injection mold for a side window of a motor vehicle

Abstract

The utility model discloses an injection mold of automobile side wall window, including the first cavity of the hard glue part of forming product and the second cavity of the hard glue part glue -coated, be equipped with at least one for the mould core of forming exhaust hole in the first cavity, the mould core is located corresponding product hard glue part to be glued position, the utility model provides an injection mold of automobile side wall window of exhaust in time makes that the rejection rate is low.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold for an automobile side window. Background Technology

[0002] In the vehicle body structure, the rear door assembly and the side window assembly are generally flexibly matched through the rear door sealing system to achieve multiple functions such as appearance matching, sealing, sound insulation, and interaction between the driver's cabin and the outside. Therefore, the rear door assembly and the side window assembly are important matching structures on the side of the vehicle. Among them, the side window glass and the side window rubber cover constitute the main components of the side window assembly.

[0003] According to existing technology, when injection molding side windows, hard plastic is first used to mold the product, and then soft plastic is used to wrap the hard plastic. However, during the injection molding of soft plastic, since the soft plastic is wrapped around the circumference of the side window, it is impossible to vent air in time, resulting in bulges and weld lines on the product surface. In addition, the high gloss surface of the product tends to stick to the front mold, and the suction force is too great when the mold is opened, causing the buckles on the product to break, resulting in a high scrap rate. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an injection mold for automobile side windows that can exhaust gas in time and thus reduce the scrap rate.

[0005] To achieve the above objectives, the technical solution of this utility model is: an injection mold for a car side window, comprising a first cavity for molding a hard plastic part of the product and a second cavity for encapsulating the hard plastic part, wherein the first cavity is provided with at least one mold core for molding an exhaust hole, and the mold core is located at the position of the hard plastic part of the product to be encapsulated.

[0006] With the above structure, this utility model has the following advantages compared with the prior art: First, the hard plastic part of the product is formed using the first cavity, and then the hard plastic part is wrapped with plastic using the second cavity. A mold core is set in the first cavity, and an exhaust hole is set in the mold core at the position where the hard plastic part of the product is to be wrapped. In this way, the exhaust hole can be used to release air when injecting soft plastic, so that there are no bulges or weld lines on the product surface, the suction force is small when opening the mold, the buckles on the product are not easy to break, and the scrap rate is low. In addition, when injecting soft plastic, the soft plastic is used to fill the exhaust hole to ensure product quality.

[0007] Preferably, the length of the mold core is greater than or equal to the thickness of the hard plastic part of the product to be coated, so that the vent holes penetrate through the product surface and ensure the venting effect.

[0008] Preferably, it also includes an exhaust channel communicating with the exhaust port, so that the gas in the second cavity is discharged sequentially through the exhaust port and the exhaust channel.

[0009] Preferably, an exhaust space is provided between the hard rubber part of the product to be coated and the second cavity. The exhaust channel is connected to the exhaust hole through the exhaust space. The exhaust space is set so that the gas in the exhaust hole is concentrated in the exhaust space, which is convenient for it to be discharged together. The exhaust speed is fast and the exhaust effect is good.

[0010] Preferably, the venting space is located between the bottom surface of the second cavity and the inner surface of the hard plastic part of the product, corresponding to the position to be coated, which is convenient for setting.

[0011] Preferably, the mold core is located close to the glossy surface of the product to prevent the excessive suction force of the glossy surface from breaking the buckle when the mold is opened.

[0012] Preferably, it includes a front mold assembly and a rear mold assembly; during mold closing, the first cavity and the second cavity are formed by the cavity between the front mold assembly and the rear mold assembly, respectively, so that a mold can simultaneously inject hard plastic and soft plastic. Attached Figure Description

[0013] Figure 1 This is a perspective view of the front mold assembly of an injection mold for a car side window according to this utility model.

[0014] Figure 2 yes Figure 1 An enlarged diagram of A in the diagram.

[0015] Figure 3 This is a perspective view of an injection mold product for a car side window according to this utility model.

[0016] Figure 4 This is a perspective view of the hard plastic part of an injection mold product for a car side window according to this utility model.

[0017] Figure 5 This is a front sectional view of the injection mold front mold assembly for an automotive side window according to this utility model.

[0018] Figure 6 yes Figure 5 Enlarged diagram of B in the diagram.

[0019] Among them, 1. Product, 110. Vent hole, 2. First cavity, 210. Mold core, 3. Second cavity, 4. Vent channel, 5. Vent space, 6. Front mold assembly, 7. Rear mold assembly. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a perspective view of the front mold assembly of an injection mold for an automotive side window, according to this utility model. Figure 2 yes Figure 1An enlarged diagram of A in the diagram is shown below. Figure 1 and 2 In the illustrated embodiment, this utility model provides an injection mold for an automotive side window, including a first cavity 2 for molding the hard plastic portion of product 1 and a second cavity 3 for encapsulating the hard plastic portion. The first cavity 2 contains at least one mold core 210 for molding vent holes 110, and the mold core 210 is located at the position corresponding to the encapsulation point of the hard plastic portion of product 1. When injecting soft plastic into product 1, because the hard plastic portion of product 1 is completely encapsulated by soft plastic, air cannot escape, causing other problems such as bulges and weld lines on the surface of product 1. Additionally, the glossy surface (glass surface) of product 1 easily adheres to the front mold, and when the mold is opened, the suction force is too great, causing the clips on product 1 to break, leaving the clips on the bottom surface of product 1. Therefore, to ensure defect-free production of product 1, air must be expelled during the production of soft plastic by molding vent holes 110 on the hard plastic portion of product 1. The number of vent holes 110 can vary depending on the severity of air entrapment.

[0022] As one embodiment, the length of the mold core 210 is greater than or equal to the thickness of the hard plastic part of the product 1 to be coated, so that the vent hole 110 penetrates the surface of the product 1, and the gas on the upper surface and the bottom surface of the product 1 can be discharged through the vent hole 110, ensuring the venting effect and ensuring product quality.

[0023] Figure 3 This is a perspective view of an injection mold product for an automotive side window according to this utility model. Figure 3 This is a perspective view of the hard plastic part of an injection mold product for a car side window according to this utility model, as shown below. Figure 3 and 4 In the embodiment shown, the rigid plastic part is first formed using the first cavity 2. The rigid plastic part has vent holes 110, such as... Figure 4 The number and position of the vent holes 110 are determined based on the severity of air entrapment. Specifically, the mold core 210 is located near the glossy surface of the product 1 to prevent excessive suction from the glossy surface from breaking the clips during mold opening. Specifically, the mold core 210 is arranged in the first cavity 2 along the circumferential direction of the glossy surface of the product 1.

[0024] During soft rubber injection molding, the soft rubber fills the vent holes 110, resulting in a surface free of air bubbles on the final product 1, leading to high product quality. Figure 3 .

[0025] Figure 5 This is a front sectional view of the front mold assembly of an injection mold for an automotive side window according to this utility model. Figure 6 yes Figure 5 An enlarged diagram of B in the diagram is shown below. Figure 1 , 5In the embodiment shown in Figure 6, it includes a front mold assembly 6 and a rear mold assembly 7; during mold closing, the first cavity 2 and the second cavity 3 are formed by the cavities between the front mold assembly 6 and the rear mold assembly 7, respectively. In this embodiment, the mold core 210 is disposed in the first cavity 2 at the position corresponding to the front mold assembly 6.

[0026] As one embodiment, it also includes an exhaust channel 4 communicating with the exhaust hole 110, so that the gas in the second cavity 3 is discharged out of the mold in sequence through the exhaust hole 110 and the exhaust channel 4. Specifically, the exhaust channel 4 is provided in the rear mold assembly 7, one end of the exhaust channel 4 is communicating with the exhaust hole 110, and the other end of the exhaust channel 4 is communicating with the outside of the rear mold assembly 7.

[0027] Furthermore, an exhaust space 5 is provided between the hard plastic part of product 1 to be coated and the second cavity 3. The exhaust channel 4 is connected to the exhaust hole 110 through the exhaust space 5. The exhaust space 5 is set so that the gas in each exhaust hole 110 is concentrated in the exhaust space 5, which is convenient for them to be discharged together. The exhaust speed is fast and the exhaust effect is good. Specifically, multiple exhaust channels 4 are set to speed up the exhaust speed and ensure the exhaust effect.

[0028] Furthermore, the venting space 5 is located between the bottom surface of the second cavity 3 and the inner surface of the hard plastic part of the product 1 corresponding to the position to be coated. The position of the hard plastic part of the product 1 to be coated is a curved surface with the opening facing downwards. This makes the inner surface of the product 1 and the bottom surface of the second cavity 3 form the venting space 5. The venting space 5 is located on the rear mold assembly 7, which facilitates timely venting and has a simple structure.

[0029] The principle of this invention is to first use the first cavity 2 to form the hard plastic part of the product, and then use the second cavity 3 to wrap the hard plastic part with plastic. A mold core 210 is set in the first cavity 2, and an exhaust hole 110 is set in the mold core 210 at the position where the hard plastic part of the product 1 is to be wrapped with plastic. In this way, the exhaust hole 110 can be used to vent air when injecting soft plastic, so that there are no bulges or weld lines on the surface of the product 1, the suction force is small when the mold is opened, the buckles on the product 1 are not easy to break, and the scrap rate is low. In addition, when injecting soft plastic, the soft plastic is used to fill the exhaust hole 110 to ensure product quality.

[0030] Working principle: This utility model is for injection molding of high-gloss two-color products. First, the rigid plastic part of product 1 is produced through the first cavity 2, such as... Figure 4 Then, through the second cavity 3, the hard plastic part of product 1 is completely wrapped in soft plastic on all sides, such as... Figure 3 Because of the vent 110, vent space 5, and vent channel 4, gas is discharged during the production of soft rubber, and product 1 is produced without defects.

[0031] Based on the above solutions, if any modifications or variations to this utility model do not depart from the spirit and scope of this utility model, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this utility model, then this utility model also intends to include such modifications and variations.

Claims

1. An injection mold for a car side window, comprising a first cavity (2) for a rigid plastic portion of a molded product (1) and a second cavity (3) for overmolding the rigid plastic portion, characterized in that: The first cavity (2) is provided with at least one mold core (210) for forming an exhaust hole (110), and the mold core (210) is located at the position where the hard plastic part of the corresponding product (1) is to be coated.

2. The injection mold for a car side window according to claim 1, characterized in that: The length of the mold core (210) is greater than or equal to the thickness of the hard plastic part of the product (1) at the position where the plastic is to be coated.

3. The injection mold for a car side window according to claim 2, characterized in that: It also includes an exhaust passage (4) that communicates with the exhaust port (110).

4. The injection mold for a car side window according to claim 3, characterized in that: The product (1) has an exhaust space (5) between the hard plastic part to be coated and the second cavity (3), and the exhaust channel (4) is connected to the exhaust hole (110) through the exhaust space (5).

5. The injection mold for a car side window according to claim 4, characterized in that: The exhaust space (5) is located between the bottom surface of the second cavity (3) and the inner surface of the hard plastic part of the product (1) corresponding to the position to be coated.

6. The injection mold for a car side window according to claim 1, characterized in that: The mold core (210) is located near the glossy surface of the product (1).

7. The injection mold for a car side window according to claim 1, characterized in that: It includes a front mold assembly (6) and a rear mold assembly (7); during mold closing, the first cavity (2) and the second cavity (3) are formed by the cavity between the front mold assembly (6) and the rear mold assembly (7), respectively.

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