Injection Molding
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HDPE '2079851475616104452 weld lines
Problem Phenomenon
The weld lines of HDPE products are obvious and weak.
Cause Analysis
Fast crystallization; when the front confluence temperature is insufficient, the bond is weak; more obvious with poor venting.
Solution
①Increase melt temperature and speed; ②vent at the confluence; ③adjust the gate position; ④increase the mold temperature.
Key Takeaway
Weld lines: grab temperature, keep venting.
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