Injection Molding
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Stress cracking of PLA injection molded products
Fenómeno do problema
The product cracks during storage or use.
Análise das causas
The molding internal stress is too large (fast cooling), and the inherent brittleness of PLA is sensitive to stress concentration.
Solução
Raise the mold temperature to reduce the cooling rate; avoid sharp corners in product design; anneal at 60-80°C.
Conclusão principal
PLA stress cracking is related to its inherent brittleness.
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