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Little coextruder, big energy savings.

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 L 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: (781) 344-5800 * PTDirect: 274WX

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Title Annotation:KEEPING UP WITH: Extrusion
Publication:Plastics Technology
Geographic Code:1USA
Date:Jun 1, 2006
Words:145
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