Blow Molding
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Uneven wall thickness of PET stretch blow bottles
Problem Phenomenon
Uneven wall thickness distribution of injection-stretch-blow molded PET bottles, bottom too thick, shoulder too thin, or left-right inconsistency of the bottle body.
Cause Analysis
Unreasonable preform design (axial wall thickness distribution mismatched with stretch ratio), stretch rod not concentric, insufficient '2079851475616104457 air pressure.
Solution
Optimize preform design, calibrate concentricity of stretch rod and mold, increase '2079851475616104457 pressure to 2.5-4.0MPa, optimize preform heating distribution.
Key Takeaway
PET bottle wall thickness uniformity is the synergistic result of preform design, heating control, and '2079851475616104457 parameters.
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