Material Drying
4 조회수
Product cracks during subsequent use or storage
문제 현상
The product cracks during subsequent use or storage, cracks mostly appear at stress concentration sites (gate, weld line, corners)
원인 분석
Injection residual stress too large, not eliminated
Demolding force too large, causing microcracks
Cellulose acetate butyrate absorbs moisture, internal expansion stress superimposed
Stress concentration at the gate area
Unreasonable product design, corners without rounded transitions
해결 방법
Annealing treatment to eliminate residual stress
Optimize demolding to reduce damage
Control moisture absorption environment and storage temperature
Optimize the gate to reduce stress concentration
Design rounded corners R≥0.5mm, avoid sharp corners
핵심 요약
Internal stress cracking requires eliminating residual stress and optimizing design
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