Injection Molding
4 조회수
Cracking of acrylonitrile-butadiene-styrene copolymer Products Caused by Internal Stress
문제 현상
The product cracks during use or storage; the root cause is the internal stress generated during processing.
원인 분석
（1）The injection speed is too fast, and molecular chain orientation produces orientation stress
（2）The holding pressure is too high or the holding pressure time is too long
（3）The mold temperature is too low, and the melt cools rapidly, producing thermal stress
（4）The product wall thickness is uneven, and stress concentrates at the thick-thin junction
（5）Mechanical stress during demolding
해결 방법
（1）Reduce the injection speed and adopt multi-stage injection
（2）Appropriately reduce the holding pressure
（3）Increase the mold temperature to a higher value within the 50-90°C range
（4）Optimize the product design with uniform wall thickness, and enlarge the fillets at the corners
（5）Ensure uniform force during demolding
핵심 요약
Internal stress cracking is a manifestation of the processing stress exceeding the material strength.
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