Tad McGwire is president of Industrial Heater Corp., Cheshire, Conn., a manufacturer of electric heaters such as band, cartridge and immersion heaters. For more information from Industrial Heater Corp., call (203) 250-0500 or visit www.industrialheater.com.
In injection-molding and extrusion processes, water or air cooling is used to regulate
the temperature of the molding process and remove excess heat cause by shear. A simple, closed-loop temperature control system typically involves the input of heat, a sensor and a controller.