Injection Molding
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HDPE '2079851475616104452 ejector whitening
Problem Phenomenon
Whitening at the ejector pins.
Cause Analysis
Large shrinkage core-holding force, concentrated force during ejection; insufficient cooling.
Solution
①Extend cooling; ②increase the ejection area; ③lower the holding pressure; ④polish the core.
Key Takeaway
Ejector whitening = large holding force + concentrated force.
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