Injection Molding
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PP Injection Part Deformation—Packaging-Induced
Problem Phenomenon
Qualified PP parts deform after packing; customers receive warped parts.
Cause Analysis
Parts are packed and stacked before fully cooling; residual heat + stacking load cause PP creep deformation.
Solution
①Pack only after parts fully cool; ②add separators in packaging to disperse load; ③optimize stacking method; ④evaluate packing temperature.
Key Takeaway
Packing hot parts = secondary deformation source.
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