DELIVERY PUMP FOR A POLYMER MELT, EXTRUSION DEVICE AND METHOD FOR FILAMENT PRODUCTION
The invention relates to a delivery pump (1) for a polymer melt and, in particular, a melt pump for filament production which, as a positive displacement pump, has a feed channel (41) for feeding in a polymer melt, an outlet channel (42) for discharging the polymer melt, and a gearwheel arrangement (4), with a first gearwheel (10) with a first rotational axis (11) and with a second gearwheel (20) with a second rotational axis (21), which second gearwheel (20) is in meshing engagement with said first gearwheel (10), in a transition region between and in a fluidic connection with the feed channel (41) and the outlet channel (42). In the case of the delivery pump (1) according to the invention, the first gearwheel (10) and the second gearwheel (20) can be rotated about their respective rotational axis (11, 21) in a manner which meshes with one another, such that, upon rotation, a polymer melt which is fed in can be transferred from the feed channel (41) to the outlet channel (42). A longitudinal axis (43) of the feed channel (41) and a longitudinal axis (44) of the outlet channel (42) enclose an angle in a range of from 70° to 110°, and preferably enclose an angle of 90°. A connecting line (45) of the rotational axes (11, 21) which lies perpendicularly on the rotational axes (11, 21) of the gearwheels (10, 20) encloses, with the longitudinal axis (43) of the feed channel (41) and with the longitudinal axis (44) of the outlet channel (42), an identical or substantially identical angle in a range of from 30° to 60°, and preferably encloses an angle of 45°.