Production Process & Product Defects
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Production Process & Product Defects

  • Q Difficult demolding, plastic sticking to mold cavity?

    A
    Excessively high mold temperature; insufficient draft angle; rough mold cavity surface; over‑high raw material temperature; appropriate release agent can be added.

  • Q Products cannot be fully blown out or have local depressions?

    A
    Insufficient blowing air pressure; blocked blowing nozzle; over‑fast mold cooling; too‑short parison; blocked mold exhaust holes.

  • Q Obvious parting line and large flash on products, how to fix?

    A
     Insufficient clamping force; worn mold parting surface; excessive clearance of clamping mechanism; excessive parison material volume.

  • Q How to solve air‑bubble defects on blow‑molded products?

    A
    Dry damp raw materials; reduce barrel temperature to avoid material decomposition; check screw compression ratio; remove moisture and impurities inside raw materials.

  • Q What causes uneven wall thickness of finished parts?

    A
    ① Improper die head gap adjustment; ② Unstable parison extrusion speed; ③ Raw material temperature fluctuation; ④ Inconsistent mold cooling performance; ⑤ Unstable extrusion pressure of accumulator head.

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Contact us to get the newest quotation. You will find yourself working in a true partnership that results in an incredible experience, and an end machine that is the best.
Buck-Machinery
Cangzhou Buck Machinery Manufacturing Co., Ltd. specializes in R&D, production and export of fully & semi-automatic electric blow molding machines.
  +86-17761552675
   Xitun Village, Nanchentun Town, Yunhe District, Cangzhou City, Hebei Province

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