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Kenplas Forum ==> Trouble Shooting -- PET Preform Injection Molding ==> Material driping from nozzle
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unmelt component in preform

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3/7/2010 5:40:17 PM By farooq
I would install a pneumatic shut off valve, and set it up on a timer, so you can use it as a type of valve gate. You can then use the injection machine to pull back with delay if you like.

Use of sprue break will always net a drooling. You can try setting a decompression before sprue break if your machine is so equipped, but your hot runner will still drool back.

Nozzle valve has really been the best solution.

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4/5/2009 7:48:49 AM By Graham
Pls send me all type of troubleshoting of pet preform. Thanks

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3/16/2009 9:07:33 PM By Asutosh
No problem, but you may increase injection pressure a little bit as spring nozzle makes some pressure loss.

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 8/15/2008 11:15:47 AM By Kenplas
Will there be any problem using spring nozzle?

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8/15/2008 3:48:02 AM By Benny
Use spring nozzle instead of straight nozzle?

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8/14/2008 9:37:09 AM By Kenplas
I would like to ask how do stop material driping from nozzle as i have to retreat the novel to avoid string.

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 8/13/2008 10:54:42 PM By Benny
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