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Kenplas Forum ==> Blow Molding (Machine) ==> Bottle Neck Deforms
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I have problem with preform neck while it blows into PET bottle. The mouth of bottle distort .It is not circle. I found that when the preform are not in preform holder sometimes,it get this problem. I use ASB NB20SC blowing machine which it didn't have the punting preform onto the preform holder. I try to install ventilation fan to blow out heat at prefor holder ( at the area of preform thread )at station before blow mold. Do you have any idea to solve this problem?

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2011-5-27 19:51:55 By weeradej
I am facing a problem that botle neck gets crack while blowing. if put 1000 preforms 2 to 4 bottles get crack. what are the possible reasons for this

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 2009-7-7 14:47:28 By jayaprakash
try to decrease first zone preheat temp.

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 2008-12-11 0:24:08 By sally
The first zone may be too close to the support ring.
or theres not enough cooling to the neck while in the oven.

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 2008-5-5 5:38:05 By chris
your preblow is coming on too soon.

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 2008-5-5 5:34:56 By chris leyland
Cause: Poor neck cooling.
Check ventilation, neck cooling fan, neck cooling water, etc.

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5
 2006-2-15 15:02:32 By Kenplas
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