Injection Molding
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Leakage of the screw head non-return ring during PETG injection
Problem Phenomenon
During the holding stage, the non-return ring leaks so that the holding pressure cannot be transmitted to the cavity.
Cause Analysis
The non-return ring is worn or stuck and not closed tightly, and the sealing surface of the screw head is damaged.
Solution
Check and replace the non-return ring; repair or replace the screw head; regularly check the state of the non-return ring.
Key Takeaway
PETG non-return ring leakage directly affects the holding effect.
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