Extrusion & Post
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Internal stress cracking of products
Problem Phenomenon
Stress cracking appears in products during storage and use
Cause Analysis
Cooling is too fast, orientation is large, wall thickness is uneven, and no annealing treatment is performed
Solution
Mold temperature 100-120C, annealing 140-150C 2-4h
Key Takeaway
Annealing is the key step to eliminate internal stress
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