A mold is usually divided into two sides according to their function.
The side which is moved for mold opening is called movable side.
This side contains the ejector pins, therefore another common name is “ejection side”.

Movable Side in Plastic Industry

Injection Molding: The green components belong to the movable side of the mold.

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