Injection Molding
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Defects in wall thickness transition zones of PCTG injection products
Problem Phenomenon
Pits or stress cracks appear at wall thickness changes.
Cause Analysis
Inconsistent cooling rate and shrinkage at wall thickness changes produce stress concentration.
Solution
Smoothly transition wall thickness changes; strengthen holding pressure in that zone; optimize design.
Key Takeaway
PCTG wall thickness changes are defect-prone areas.
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