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

摘要

Melting pump for building up pressure for pushing plastic melt through a tool comprising a compressor (406) with two arranged in a housing screw conveyors (408, 408 ', 508, 508'), a transmission (405) via which the screw conveyors (408, 408 508, 508 ') are drivable synchronously 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 ', 508, 508') is provided with its own output shaft (416, 416 '; 516, 516') and wherein each screw conveyor (408, 408 '; 508, 508') is connected to the corresponding output shaft (416, 416 ', 516') , 516 ') is connected via a coupling (414, 414', 514, 514 '), characterized in that the coupling (414, 414'; 514, 514 ') has a connection to the output shaft (416, 416'; 516 '), a drive sprocket provided on the conveyor screw (408, 408', 508, 508 ') (419, 419 '; 519, 519 ') and a clutch sleeve (421, 421') engaging the output sprocket (418, 418 ', 518, 518') and the drive sprocket (419, 419 ', 519, 519') and that the drive sprocket (419, 419 ', 519, 519') and the driven sprocket (418, 418 ', 518, 518') have a different number of teeth.