Injection Molding
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PET Preform Injection Mold Sticking
Problem Phenomenon
The preform sticks to the cavity and is scratched.
Cause Analysis
High holding pressure, small draft angle, insufficient cooling; PET has high rigidity and large demolding force.
Solution
①Reduce holding pressure; ②extend cooling; ③polish; ④check ejection.
Key Takeaway
Mold sticking = holding pressure and cooling.
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