Posts: 1
From:Ireland
Registered: Jan 2004

posted January 28, 2004 05:20 AM               

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I have a big problem here at my plant of lines Blowing and backing off. When the line blows a mushroom forms between the die and the dry calibrator. Can anybody tell me how this is happening. I know when the KN's rise it can cause it but why all of a sudden those this occur. We aer in the business of Foam board extrusion and line blowing is resulting in a lot of down time which i really want to eliminate. Can anybody shed some light on this situatino for me please.

Concerned Engineer.

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Kenneth Long

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Posts: 271
From:McHenry, IL USA
Registered: Nov 2002

posted January 28, 2004 07:10 AM               

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Ken:
I would look into the compounding first hand. Sounds to me like a poor dispersion issue.

Also look at your feeding system very closely, as you need precision feeding.

The line blowing may simply be an overdosing - or - concentration of your blowing agent.

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