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Two Shot Molding

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  • Two Shot Molding

    Two shot molding, also called double shot injection molding, dual shot injection molding,multi shot injection molding or 2k injection moulding is one category of injection molding using two different thermoplastic materials to produce injection molded parts in two colors or two components in the two shot injection molding process to produce 2 shot molding in large quantities quickly, economically and efficiently. Multi shot molding has characteristics as below:To get more news about 2k mold, you can visit asm-mold.com official website.

    Keyplast plastic injection molding manufacturer also provides overmolding injection molding, insert injection molding and materials used in injection moulding with cheap prices. Firstly one shot of materials is injected into a mold and cooled to form a solid part. Secondly, the mold opens and rotates 180 degrees and then closes. The second shot of materials is injected into the mold, through or around the first molded part. After sufficient cooling, the mold opens and the multi-resin molded part is ejected. 2 shot moulding has key factors as below:

    The mold used in two shot molding consists of different tool sets. In rotating platen settings, these two shot injection molding tools share the same core, but different cavities. The runner must be designed to close during its inactive forming step.

    Wall thickness is an important two shot molding design consideration when designing parts for a number of reasons:

    Due to the molding pressure from the second step, the substrate wall should be thick enough to withstand the force without collapsing.

    Walls should not exceed traditional thickness guidelines to produce effects attributable to irregular cooling.

    To ensure accurate and thorough flow of 2k molding material into all parts of the cavity, the wall thickness should not fall below a certain minimum value.

    Ideally, materials should be injected in a certain order, taking into account the following factors:

    The first shot should be the harder plastic of the two.

    If transparent and opaque materials are used, inject transparent materials first.

    Generally speaking, the material with higher temperature is injected first.

    For mold frame and insert design:

    Make sure the mold can be rotated 180 degrees.

    Any insertion should be symmetric.

    The push rod plate and thimble are stabilized by a return spring to prevent damage during mold rotation.

    The cooling system of double shot molding must be able to function adequately on the first and second shots.

      May 8, 2023 9:13 PM MDT
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