American Kuhne, Ashaway, R.I., has introduced a gearless extruder aimed at medical tubing. The extruder does not require a gearbox, eliminating contamination from drive-belt dust and gear oil, and thus suiting it to clean-room and other controlled environments. This new modular extruder includes a high-torque, low-speed, synchronous AC motor with integral thrust bearing that directly drives the screw. The combination of the permanent-magnet motor and elimination of the gearbox increases the machine’s energy efficiency by at least 10%, and is extremely quiet, the company claims.
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