A new structure for preventing flash of two-color product injection molding

Abstract

The utility model relates to product injection molding technical field, and disclose a new structure of preventing bicolour product injection molding flash, including fixed die, the fixed die is fixedly installed on the equipment, the cavity surface of fixed die is installed with movable die, there is to be demoulding product between fixed die and movable die. This new structure of preventing bicolour product injection molding flash, fixed die is the part of fixed immovability, movable die is the part of movable, movable die can be removed when opening the mould and be convenient for taking out to be demoulding product, the boundary of product black edge is 0.07mm longer than the boundary of product white edge, can reduce the appearance of flash under the action of fixed die and movable die, fixed die and movable die are made of hard alloy, and the hardness of hard alloy is high, reduces mould abrasion, improves the life, and the cavity surface treatment of fixed die and movable die has ceramic composite coating, and ceramic composite coating is resistant to high temperature and high pressure, makes it applicable to high pressure injection molding, improves practicality and flexibility.

Description

Technical Field

[0001] This utility model relates to the field of product injection molding technology, specifically a new structure for preventing flash during injection molding of two-color products. Background Technology

[0002] With the rapid development of automobiles, OEMs have increasingly higher requirements for the appearance of lighting fixtures. At the same time, dual-color through taillights and long high-mounted brake lights are currently favored by OEMs. However, dual-color injection molding faces the problem of flash. Flash refers to the thin film of excess material formed at the interface between two materials or on the parting surface of the mold due to the overflow of molten plastic.

[0003] Due to various reasons, some traditional injection molding structures require larger molds and matching machines, as well as higher injection pressure during injection molding. This makes the molds more prone to wear and tear, increases the frequency of maintenance, and makes it difficult to meet high-pressure injection, resulting in uneven parting line edges that are prone to jaggedness. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a new structure to prevent flash during injection molding of two-color products, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a new structure for preventing flash during injection molding of two-color products, comprising a fixed mold core, the fixed mold core being fixedly installed on the equipment, a movable mold core being installed on the cavity surface of the fixed mold core, and a product to be demolded being placed between the fixed mold core and the movable mold core.

[0006] Preferably, the product to be demolded consists of a black edge and a white edge, wherein the boundary of the black edge is 0.07 mm longer than the boundary of the white edge.

[0007] Preferably, the fixed mold core and the moving mold core are made of cemented carbide, and the cavity surfaces of the fixed mold core and the moving mold core are treated with a ceramic composite coating.

[0008] Compared with the prior art, this utility model provides a new structure to prevent flash in two-color injection molding products, which has the following beneficial effects: In this new structure to prevent flash in two-color injection molding products, the fixed mold core is a fixed part, and the moving mold core is a movable part. The moving mold core can move during mold opening to facilitate the removal of the product to be demolded. The boundary of the black edge of the product is 0.07mm longer than the boundary of the white edge of the product. Under the action of the fixed mold core and the moving mold core, the occurrence of flash can be reduced. The fixed mold core and the moving mold core are made of cemented carbide. Cemented carbide has high hardness, which reduces mold wear and improves service life. The cavity surface of the fixed mold core and the moving mold core is treated with a ceramic composite coating. The ceramic composite coating is resistant to high temperature and high pressure, making it suitable for high-pressure injection molding, improving practicality and flexibility. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the black border structure of the product of this utility model.

[0010] In the diagram: 1. Fixed mold core; 2. Moving mold core; 3. Product to be demolded; 4. Black edge of the product; 5. White edge of the product. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] like Figure 1-2 As shown, this utility model provides a technical solution: a new structure to prevent flash during injection molding of two-color products, including a fixed mold core 1, which is fixedly installed on the equipment, and a movable mold core 2 is installed on the cavity surface of the fixed mold core 1, with a product 3 to be demolded between the fixed mold core 1 and the movable mold core 2.

[0013] Furthermore, the product to be demolded 3 consists of a black edge 4 and a white edge 5, with the boundary of the black edge 4 being 0.07mm longer than the boundary of the white edge 5.

[0014] Specifically, compared to regular two-color products, the amount of black film adhesive is increased, reducing the possibility of flyaways.

[0015] Furthermore, the fixed mold core 1 and the moving mold core 2 are made of cemented carbide, and the cavity surfaces of the fixed mold core 1 and the moving mold core 2 are treated with a ceramic composite coating.

[0016] Specifically, the hard alloy material and ceramic composite coating enable the mold to be better suited for high-temperature and high-pressure environments, making it suitable for high-pressure injection molding. The ceramic composite coating reduces adhesion and facilitates demolding.

[0017] Working principle: First, a moving mold core 2 is installed on the cavity surface of the fixed mold core 1. The product to be demolded 3 is between the fixed mold core 1 and the moving mold core 2. The moving mold core 2 can move during mold opening to facilitate the removal of the product to be demolded 3. Second, the boundary of the black edge 4 of the product is 0.07mm longer than the boundary of the white edge 5 of the product. This structure can reduce the occurrence of flash. Finally, the fixed mold core 1 and the moving mold core 2 are made of cemented carbide. Cemented carbide has high hardness and good stability. The cavity surface of the fixed mold core 1 and the moving mold core 2 is treated with a ceramic composite coating. The ceramic composite coating is resistant to high temperature and high pressure, making it suitable for high-pressure injection molding.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel structure for preventing flash during injection molding of two-color products, comprising a fixed mold core (1), characterized in that: The fixed mold core (1) is fixedly installed on the equipment, and the moving mold core (2) is installed on the cavity surface of the fixed mold core (1). There is a product (3) to be demolded between the fixed mold core (1) and the moving mold core (2).

2. The novel structure for preventing flash during injection molding of two-color products according to claim 1, characterized in that: The product to be demolded (3) consists of a black edge (4) and a white edge (5), and the boundary of the black edge (4) is 0.07 mm longer than the boundary of the white edge (5).

3. A novel structure for preventing flash during injection molding of two-color products according to claim 1, characterized in that: The fixed mold core (1) and the moving mold core (2) are made of cemented carbide, and the cavity surfaces of the fixed mold core (1) and the moving mold core (2) are treated with a ceramic composite coating.

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