Hot runner or tubular coiled heaters are compact, flexible heaters used in precision
applications like injection molding hot runner systems. They consist of a nickel-chrome wire in a
stainless-steel sheath, coiled into tight configurations, with operating temperatures up to 1200°F
(649°C). Their small diameter (1.5–4 mm) allows for intricate heating patterns.
Design Features:
● Flexible or pre-formed coil designs
● High-purity MgO insulation
● Optional thermocouple integration
● Pressed or clamped installation options
Applications:
● Hot runner systems in plastic injection molding
● Nozzle heating in packaging
● Manifold heating
● Thin-walled mold heating
Benefits:
● Precise and uniform heating
● Compact design for tight spaces
● High reliability and long lifespan
● Easy to shape for custom applications
Technical Insight: These heaters achieve watt densities up to 60 W/in2, with their flexibility
allowing for complex geometries in hot runner manifolds.
