Injection Molding
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HDPE injection molded product warpage — ejection-induced
Problem Phenomenon
The product deforms at the moment of ejection and sets as warpage after cooling.
Cause Analysis
The ejection force plastically deforms the product while it is still hot; insufficient cooling, uneven ejection.
Solution
①Extend cooling; ②balance ejection; ③lower the mold temperature; ④optimize the ejector pin layout to rigid areas.
Key Takeaway
Ejection deformation = insufficient cooling + uneven ejection.
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