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Compression Molding

A manufacturing process where rubber compound is placed in an open heated mold cavity, then compressed under heat and pressure until the material cures.

What is Compression Molding?

Compression Molding Process

Compression molding is one of the oldest rubber manufacturing processes. Pre-measured uncured rubber compound is placed in a heated mold cavity, then compressed under high pressure (1000-2000 PSI) until vulcanized. Process steps include pre-form preparation, loading into heated mold, compression under pressure, curing, and demolding. Cost-effective for medium volumes and handles thick cross-sections well.

Usage Example

Large rubber gaskets are manufactured using compression molding because it handles thick cross-sections well and is cost-effective.

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Use our free calculators and reference tools for O-ring and groove design.