Blow Molding
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HDPE '2079851475616104457 container excessive shrinkage
Problem Phenomenon
HDPE bottles/drums shrink excessively after demolding, and the volume or assembly dimensions are out of tolerance.
Cause Analysis
Excessive wall thickness/weight, high mold temperature, high melt temperature, low blowing pressure, short blowing time, and high storage environment temperature all amplify shrinkage.
Solution
①Lower the melt and mold temperatures; ②increase blowing pressure and extend blowing time; ③verify the mold volume; ④store products away from high-temperature environments; ⑤select a lower-density grade if necessary.
Key Takeaway
HDPE '2079851475616104457 shrinkage = temperature and blowing energy management.
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