Injection Molding
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PETG '2079851475616104452 insufficient melt cushion
Problem Phenomenon
The melt cushion at the front of the screw is insufficient, and the holding pressure effect is poor.
Cause Analysis
Metering stroke set too short, back pressure insufficient and melt not dense enough, check ring leakage.
Solution
Increase the metering stroke to ensure a sufficient cushion of 3-6mm; appropriately increase back pressure; check the check ring.
Key Takeaway
PETG melt cushion is the basis of holding pressure effectiveness.
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