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inert gas purge or vacuum for thick section peroxide cured elastomers
- Thread starter gumby69
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GrahamBennett
Materials
Use CaO in peroxide cured HNBR and EPDM too. It is possible to use a vacuum hood for transfer and compression moulding.
btrueblood
Mechanical
We have a part some 36" in diameter that is transfer molded using peroxide-cured epdm. We have considered a vacuum system, and may have to do so in the future. The biggest concern is how to port sufficient vacuum flow area, it will be a bit of a design challenge in the existing mold. Our vendor has other, smaller parts with vacuum systems for perfluoro-elastomers; the vacuum porting was designed into the molds from the start.
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