The second extruder built in North America with a gearless permanent-magnet torque motor is a new coextruder from Addex Inc., Stoughton, Mass. (The first machine of this type was built a few months ago by Davis-Standard.

The second extruder built in North America with a gearless permanent-magnet torque motor is a new coextruder from Addex Inc., Stoughton, Mass. (The first machine of this type was built a few months ago by Davis-Standard. Both new extruders will be shown at NPE this month in Chicago.) Addex's gearless Slimline coextruder has 70 mm diam. and 30:1 L/D. It uses a new 100-hp gearless torque motor from Baumuller in Germany. Having no gears saves space in a crowded circle of seven or nine extruders. Gears also waste energy as frictional heat, which dissipates in the plant and can disrupt the bubble. Synchronous torque motors are water-cooled and dissipate 37% less energy than standard DC motors or 30% less than AC motors, Addex says. Baumuller is developing a larger motor for a 90-mm Addex extruder.

Addex Inc.
154 Maple St. Stoughton, MA 02072-1179
Phone (781) 344-5800 Fax (781) 344-5766