Injection Molding
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PET Preform Mold Eccentric Wear
Problem Phenomenon
Fixed-cavity preforms are eccentric, and the bottom injection point of blown bottles is offset.
Cause Analysis
Individual cavity wear/damage of the multi-cavity preform mold causes preform wall thickness eccentricity.
Solution
①Check preform concentricity cavity by cavity to locate the problem cavity; ②repair/replace that cavity; ③establish cavity number traceability.
Key Takeaway
Cavity number traceability locates the eccentricity source.
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