The cooling system in the injection mold is usually inserted into the steel by drilling.
By adding plugs the flow path for the coolant is clearly defined.
The conventional cooling is cheap compared to other cooling technologies and, for most molds, it is satisfying.
Injection Molding: This mold insert contains a conventional cooling, in which later a baffle is inserted.
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This glossary of plastic industry is provided by PLEXPERT Canada Inc.