Wabash MPI Hydraulic Presses

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Glossary of Terms U-V

Glossary Terms used in the Compression and Transfer Molding Process

A-BC-DE-FG-HI-JK-LM-NO-PQ-RS-TU-VW-X


UNDERCURE:

State of vulcanization less than optimum. It may be evidenced by tackiness or inferior physical properties.

VENTING:

Removal of trapped air from the mold; accomplished either by the incoming injected rubber expelling the air via vent grooves cut into the mold, by the use of a mechanical vacuum pump to evacuate the closed mold chamber prior to the onset of injection, or by the use of receiver tanks to reach vacuum quickly.

VISCOSITY:

The resistance of a material to flow under stress.

VULCANIZATION:

An irreversible process in which the rubber's chemical structure is altered, and as a result, the properties of the rubber are improved.

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