Sell Coil and Hot Runner Heater
Distributor Coil and Hot Runner Heater
NPH Coil heaters or otherwise known as sprue bushing heaters are electric resistance heaters which are composed of a straight or wire wound miniature helical coil resistance wire, magnesium oxide (MgO) insulation, a thin sheath metal shell (usually stainless steel that is later annealed) and a transition piece that connects the power and thermocouple leads to the heater.
NPH swaging and drawing process involved in manufacturing of coil/cable heaters compacts the magnesium oxide (MgO) insulaton that house the heating element and thermocouple wire into a solid mass, producing a rugged and durable coil/cable heater, that provides excellent thermal conductivity, dielectric strength and quick thermocouple response. Because of their low thermal mass coil heaters offer high performance that can acquire temperatures of up to 1500*F along with precise temperature control.
NPH coil heaters/cable heaters can be manufactured using square, rectangular or round cross section profiles. Coil heaters, heat coils and cable heaters come in a variety of shapes/configurations as required by its many applications. They can be shaped in straight lengths, spirals and other patterns similar to those found with tubular heater elements. Frequently though, custom (bespoke) coil heaters are configured as low profile small diameter, high performance nozzle heaters used on injection molding machine nozzles and sprue bushings.
Other uses for coil heaters include using them as cartridge heaters where irregular size mold or platen bores are found. A straight, round cable heater can snake through a sealing bar in packaging and sealing equipment installations. Heat tracing, rod, pipe and tube heating are among other areas where coil heaters are used. They can also be cast into metal or welded onto machine component parts. All of our coil heaters are custom (bespoke) made and are CSA and UL recognized.