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Thread: PET Injection mold, preforms get stuck before extraction.

  1. #1
    Join Date
    Oct 2016
    Posts
    1

    PET Injection mold, preforms get stuck before extraction.

    Hello Forum
    I'm working on a injection machine, Haitian model, mold from Xinjie, 24 x 44grs PCO, problem is, is worki g good then suddendly machine can't extract, preforms get really glued to males, I have to beat it and crush all preforms near to necks to can extract, extraction press is full, it happens when charge delay 3 - 4 second more charging, what I'm doing wrong? Water temp is 18 - 20Centigrades, if take out preforms before time it get glued when is in conveyor because is too hot, when cold enough then stuck again, injection press is enough to fill cavities and not too formed, material is 0.84 density bottle grade, clear, 5% crushed, weight must be 44 grams and I get 43 - 43.5, I'm thinking machine is a little small for it mold, can anybody help me? Now is working but only 18 cavities, if open 2 more get stuck, please, thanks.

  2. #2
    Join Date
    Aug 2011
    Posts
    537

    Re: PET Injection mold, preforms get stuck before extraction.

    Suspect over-packing!

    KOM

    brent

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