Injection molding method for preventing large-area metal part rubber coating deformation, injection mold and large-area metal part rubber coating product

Abstract

The invention belongs to the technical field of injection molds, and particularly discloses an injection molding method for preventing large-area metal part rubber coating deformation, an injection mold and a large-area metal part rubber coating product. The injection molding method comprises the following steps of, 1, determining a stress area of a metal part; 2, putting the metal part into a cavity of the injection mold; 3, carrying out die assembly; 4, controlling supporting columns of the injection mold to move, so that the supporting columns extend into the cavity and abuts against the reverse side of the stress area of the metal part; 5, injecting molten plastic into the cavity; 6, carrying out injection molding pressure maintaining, meanwhile, withdrawing the supporting columns, forming supporting vacant positions by the supporting columns on the metal part, and filling supporting vacant positions with molten plastic under the action of injection molding pressure maintaining; and 7, carrying cooling and mold opening, and taking out a molded rubber-coated product. By supporting the reverse side of the stress area of the metal part in the mold, the defects of injection molding deformation and non-uniform rubber coating thickness of the metal part are prevented.

Description

technical field [0001] The invention belongs to the technical field of injection moulds, and in particular relates to an injection molding method for preventing deformation of large-area metal parts with rubber coating, an injection mold and a large-area metal parts rubber-coated product. Background technique [0002] Insert molding refers to a molding method in which a pre-prepared insert of different materials is placed in a mold and then molten material is injected, and the molten material is bonded with the insert to solidify to form an integrated product. [0003] Most of the in-mold inserts in the injection molding industry are small hardware, nuts, and cylindrical hardware. Due to the soft hardware materials such as copper and aluminum, they are easy to deform during the injection molding process in the mold cavity, especially for large-area hardware parts with an area of ​​more than 600 square millimeters and a thickness of about 2.5mm, the injection molding in the m...

AI Technical Summary

Problems solved by technology

Due to the soft metal materials such as copper and aluminum, they are easy to deform during the injection molding process in the mold cavity, especially for large-area hardware parts with an area of ​​more than 600 square millimeters and a thickness of about 2.5mm, the injection molding in the mold is seriously deformed. As a result, the thickness of the product's rubber coating is uneven after injection molding, which not only affects the assembly of the finished product, but also directly causes the electrical performance of the product such as electrical insulation and voltage resistance to fail to meet customer standards

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