American Kuhne Inc.'s new Backdraft extruder is designed with a reverse air cooling system, ideal for blown film processing and other types of plastics processing.
The Backdraft design removes heat and air currents from the extrusion area, giving optimum bubble stability and improving energy efficiency, the company said. Individual dampers for each zone provide superior process control and simple operation. When the dampers are closed, they prevent the “chimney effect” that happens in most air-cooled machines, which allows energy loss through convection cooling.
Dampers are connected to a common air plenum, integrated into the machine base, which is in turn connected to a single exhaust fan. The central blower eliminates the need for traditional individual blowers on each zone. When a damper opens, air is drawn down through the heater's cooling fins and through the exhaust system.
American Kuhne is based in Ashaway, R.I.
Tel. 401-326-6200, fax 401-326-6201, email [email protected].