The injection mold is usually temperature controlled by means of fluid cooling / heating during the complete cycle.
The time from the end of packing phase until ejection is called residual cooling time (blue line in the time-pressure diagram below).
During this time the cooling of the part takes place solely.

Residual Cooling Time in Plastic Industry

Injection Molding Process: The residual cooling time describes the single cooling phase of the parts.

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This glossary of plastic industry is provided by PLEXPERT Canada Inc.
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