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How to make a custom shape rubber air bladder during pip lining?

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davis45

Mechanical
Jun 8, 2005
5
IN
I work in the cast iron pip industry, and I need a process of protecting and sealing the bell of the pip during lining. I had the idea of using an air bladder (such as an inflatable raft) to protect the bell during lining. Does anyone know of a company or process of producing custom shaped air bladders?
 
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