Injection Molding
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Screw Non-Return Ring Sticking of PBT '2079851475616104452 Machine
Problem Phenomenon
The non-return ring is stuck at the screw tip and cannot open and close normally.
Cause Analysis
Additives or impurities in PBT accumulate and solidify in the non-return ring gap; the fit between the non-return ring and the screw tip is too tight; wear grooves cause sticking.
Solution
Regularly check and clean the non-return ring; ensure the non-return ring gap is reasonable; use a self-cleaning non-return ring design.
Key Takeaway
PBT non-return ring sticking seriously affects holding pressure.
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