Hot Runners

A hot runner system is an assembly of heated components—hot halves, nozzles and gates and—that inject plastic into the cavities of an injection mold. The system usually includes a heated manifold and a number of heated nozzles. The manifold distributes the plastic entering the mold to the nozzles, which then meter it precisely to the injection points in the cavities. The hot runner is equipped with its own temperature control system.

Knowledge Center

Insights into plastics technologies from industry experts.

Tooling: How to Properly Size, Gates, Runners and Sprues, Part 3

Tooling: How to Properly Size, Gates, Runners and Sprues, Part 3

Get the sprue, runner and gate sizes close to ideal the first time around.


K 2019 Report: More Control, Faster Ordering for Molds, Hot Runners

Online monitoring of existing systems and configuration and ordering of new molds were featured at K 2019, as were numerous advances in valve-gate controls.
Find Related Suppliers

Search and find related suppliers of Hot Runners

New Product Announcements

Hot Runners: Control for Hydraulic Needle Drives; Wear-Resistant Design for Abrasive Resins; and Specialized Film Insert Molding System

HRSflow has introduced a trio of developments, offering precision needle control in hydraulic systems, wear-resistant hot runners for filled resins, and a line targeting film insert molding (FIM), for the back molding capacitive films, for example.