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The methods for adjusting parameters for defects in injection molded products are as follows

• 2025-08-01

The methods for adjusting parameters for defects in injection molded products are as follows:

Auto Mould_Taizhou Jiefeng Mould Co.,Ltd. (jfmoulds.com)

(1) Defective products:

    Injection pressure ↑, back pressure ↑, injection speed ↑, nozzle temperature ↑, middle section temperature of the barrel ↑, holding time ↑, nozzle width ↑, mold temperature ↑, cooling water volume ↓, nozzle size ↑.

(2) Flash defect:

    Clamping pressure ↑, injection pressure ↓, injection speed ↓, nozzle temperature ↓, middle section temperature of the barrel ↓, injection time ↓, holding pressure time ↓, cooling time ↑, mold temperature drop ↓.

(3) Shrinkage defect:

    Injection pressure ↑, holding pressure ↑, injection speed ↑, temperature drop of the injection nozzle ↓, temperature in the middle section of the barrel ↓, holding time ↑, cooling time ↑, runner opening size ↑, cooling water volume ↑, injection nozzle size ↑.

(4) Silver line stripe defect:

    Injection speed ↓, nozzle temperature ↓, middle section temperature of the barrel ↓, end temperature of the barrel ↓, melting speed ↓, mold temperature ↑, cooling water volume ↓, nozzle size ↑.

(5) Weld mark:

    Back pressure ↑, melt speed ↑, injection speed ↑, nozzle temperature ↑, middle section temperature of the barrel ↑, runner opening size ↑.

(6) Poor gloss

    Injection pressure ↑, nozzle temperature ↑, middle section temperature of the barrel ↑, runner opening size ↑, mold temperature ↑, nozzle size ↑.

(7) Bubbles

    Injection pressure ↑, holding pressure ↑, back pressure ↑, injection speed ↓, nozzle temperature ↓, holding time ↑, middle section temperature of the barrel ↓, end temperature of the barrel ↓, runner opening size ↑, cooling water volume ↑, nozzle size ↑.

(8) Charring

    Injection pressure ↓, holding pressure ↓, nozzle temperature ↓, middle section temperature of the barrel ↓, runner opening size ↑, nozzle size ↑.

(9) Top crack

    Injection pressure ↓, injection speed ↓, temperature in the middle section of the barrel ↑, cooling time ↑, runner opening size ↑, cooling water ↑, nozzle size ↑.

(10) Bending deformation:

    Injection pressure ↑, injection speed adjustment ↓, nozzle temperature ↓, middle section temperature of the barrel ↓, end temperature of the barrel ↑, cooling time ↑ mold temperature adjustment ↓, cooling water volume ↑, holding pressure time ↓.

(11) Poor demolding:

    Injection pressure ↓, nozzle temperature ↓, cooling time ↓, middle section temperature of the barrel ↓, cooling water volume ↓, holding pressure time ↓, nozzle size ↓.

Commodity Mould_Taizhou Jiefeng Mould Co.,Ltd. (jfmoulds.com)