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Thread: Plastic Flakes forming on Mold surface

  1. #1
    Join Date
    Mar 2017
    Location
    South Africa
    Posts
    17

    Lightbulb Plastic Flakes forming on Mold surface

    Good Day,

    What could be the possible cause of plastic flakes forming on the mold surface? Its a new issue that has develop on a mold this morning. Never experienced this before. Running PP.


    Many Thanks and Regards,
    Nicholas

  2. #2
    Join Date
    Oct 2018
    Posts
    22

    Re: Plastic Flakes forming on Mold surface

    I have seen this condition with Sub-gates, The surface area where the sub-gates pulled required additional polish to remove rough surfaces that would flake while as the mold
    opened or during ejection. Not knowing what type gating your mold has I suggested this as a starting point.

  3. #3
    Join Date
    Mar 2017
    Location
    South Africa
    Posts
    17

    Re: Plastic Flakes forming on Mold surface

    Hi Brian,

    Yes it is a sub gate. and a brand new mold. I will check it out.


    Thank you,

    Nicholas

  4. #4
    Join Date
    Oct 2016
    Location
    McMinnville, OR
    Posts
    172

    Re: Plastic Flakes forming on Mold surface

    I have seen it before from the runner, part, or cold slug well dragging on the way out causing it to leave flakes on the mold.

  5. #5
    Join Date
    Dec 2016
    Posts
    131

    Re: Plastic Flakes forming on Mold surface

    I agree, check your parts and runner for drag marks, a tell tell sign for the issue you describe.

    Joel

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