In a hot runner system, the hot runner nozzle is located between the manifold and cold runner or cavity.
As it is the last heated area for the melt, a good temperature control is important.
There are both, open and closed nozzles (valve gates).

hot runner nozzle in plastic industry

Hot Runner: Sectional view of the hot runner nozzle.

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