Melting pump for building up pressure for pushing plastic melt through a tool

摘要

The invention relates to a melt pump for building pressure for pushing plastic melt through a tool comprising a compressor (406) with two arranged in a housing screw conveyors (408, 408 '), a transmission (405) via which the screw conveyors (408, 408 ') are synchronously driven and a drive (404), wherein the transmission (405) between the drive (404) and the compressor (406) is arranged, wherein in the transmission (405) for each screw conveyor (408, 408') has its own Output shaft (416, 416 ') is provided and wherein the screw conveyor (408, 408') with the corresponding output shaft (416, 416 ') via a coupling (414, 414') is connected. To provide a melt pump in which the screw gap between the two screw conveyors can be adjusted arbitrarily in a simple manner is achieved in that the coupling (414, 414 ') provided on the output shaft (416, 416') output sprocket (418, 418 ' ), one on the screw conveyor (408, 408 ') provided drive sprocket (419, 419') and the output sprocket (418, 418 ') and the drive sprocket (419, 419') detecting coupling sleeve (421, 421 ') comprises and that the drive sprocket (419, 419 ') and the driven sprocket (418, 418') has a different number of teeth.