A MELT PUMP FOR BUILDING UP PRESSURE BY PRESSING A MELT OF SYNTHETIC MATERIAL THROUGH A TOOL

摘要

The object of the invention is a melt pump for building up pressure forpressing a melt of synthetic material through a tool, comprising acompressor (406) with two worm conveyors (408, 408') disposed in ahousing, a transmission (405) by way of which the worm conveyors (408,408') are synchronously drivable and a drive (404), wherein thetransmission (405) is disposed between the drive (404) and thecompressor (406), wherein each worm conveyor (408, 408') in thetransmission (405) is provided with its own output shaft (416, 416') andwherein the worm conveyor (408, 408') is connected to the correspondingoutput shaft (416, 416') by way of a coupling (414, 414'). Creating a meltpump in which the worm gap between the two worm conveyors is easilyadjustable at will is achieved by the fact that the coupling (414, 414')comprises an output gear (418, 418') provided on the output shaft (416,416'), a drive gear (419, 419') provided on the worm conveyor (408, 408';508, 508') and a coupling sleeve (421, 421') gripping the output gear (418,418') and the drive gear (419, 419') and that the drive gear (419, 419') andthe output gear (418, 418') have a different number of teeth.