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Kenplas Forum ==> Trouble Shooting -- PET Preform Injection Molding ==> Preform Bending after Heating (Wall thickness variation)
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the preform is good the preform is bent after the last stage of heating and before blowing

Fine
Poor
3/5/2009 9:41:23 PM By elbadawy
First make sure the preforms are rotated evenly while heating.

Cause: Preform off-center.

1. Poor machine condition. Check machine level, tie bar alignment;
2. Injection pressure too high;
3. Poor mold condition, contact mold maker.

Fine
2
 Poor
4
 2/15/2006 11:49:36 AM By Kenplas
1
 
 

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