Injection Molding
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Stress Whitening Appearing in the Slider Area of Acrylonitrile-Butadiene-Styrene Copolymer Injection-Molded Products
Fenómeno do problema
Stress whitening appears in the slider area of the product, affecting product appearance and use performance.
This problem often occurs in acrylonitrile-butadiene-styrene copolymer '2079851475616104452 and needs to be solved in time.
Análise das causas
(1) The processing temperature is set improperly (range 220-260°C), resulting in unstable melt quality
(2) The material characteristics of acrylonitrile-butadiene-styrene copolymer (the most commonly used engineering plastic, good comprehensive performance, impact resistance) are sensitive to this defect
(3) The mold design or condition is poor, affecting the molding quality
(4) The process parameters (injection speed, holding pressure, etc.) are set unreasonably
(5) Improper raw material pretreatment or regrind use problems
Solução
(1) First check and optimize the barrel temperature to ensure it is reasonably set within the range of 220-260°C
(2) Adjust the injection speed and holding pressure; the recommended holding pressure for acrylonitrile-butadiene-styrene copolymer is 80-120MPa
(3) Check the mold temperature (range 50-90°C) and venting condition
(4) Ensure the raw material is fully dried (70-80°C, 3-4h)
(5) Control the regrind ratio to not exceed 15-20%, and regularly check the equipment status
Conclusão principal
This problem needs to be systematically solved from three aspects: material characteristics, process parameters, and mold conditions.
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