| 摘要 |
<p>Extruder (1) which takes plastic material in granulate form and transfers it to molten state, consists of a cylinder (6) in which an extruder worm (2) rotates. Worm is connected to drive unit (3) which has motor (9). Drive unit consists of a number of motors, and shafts of at least two motors line up. Motors are asynchronous electric motors and have common frequency converter. <??>An extruder (1) which takes plastic material in granulate form and transfers it to a molten state, consists of a cylinder (6) in which an extruder worm (2) rotates. The worm is connected to a drive unit (3) which has a motor (9). The motor is also connected to other rotors. The worm and at least one rotor have the same rotational speed. The drive unit consists of a number of motors, and the shafts of at least two motors line up. The motors are asynchronous electric motors and have a common frequency converter. The motors are controlled according to the mass throughput of the extruder or the pressure inside the cylinder.</p> |
