Preform Bottom Bursts while Stretching/Blowing, Blow Molding (Machine)

Kenplas Forum ==> Blow Molding (Machine) ==> Preform Bottom Bursts while Stretching/Blowing

is it always from the same preform cavity? Same blow mold?

Totally random? type of machine linear or rotary? cavitation? 2 step or single step?

I surprise people can actually post advice without knowing the basic of the issue. It's like shooting a fly in the dark.

2008-7-20 7:08:52 By fred

1. Preblow may too early. Delay preblow and high blow timer.
2. Insufficient resin drying

2008-5-22 5:24:50 By Raju Sapkal

stretching too slow

2008-3-1 1:42:51 By wilson

1. Temperature of preform bottom is too high; or temperature of preform body is too low;
2. Preforms are made of depolyerized PET resin.

2006-2-15 15:11:18 By Kenplas


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