Device and method for removing impurities from shredded plastic

摘要

A device for removing impurities from shredded plastic has a first and second cleaning disk with first and second cleaning surfaces, the cleaning surfaces are opposite each other and delimit a cleaning gap. A drive device rotates the cleaning disks, and shredded plastic is fed between the cleaning disks. The cleaning surfaces have a plurality of cleaning ribs extending between an inner and outer edge of the cleaning surfaces, wherein at least one flank of the cleaning ribs is angled or curved relative to the axial direction of the respective cleaning disk, and a plurality of cleaning bars running transversally to the direction of extension of the cleaning ribs are arranged between at least some cleaning ribs neighboring each other.

主权项

1. A method for removing impurities from shredded plastic (56) using an apparatus comprising a first cleaning disk (10) with a first cleaning surface (12) and a second cleaning disk (40) with a second cleaning surface (42), wherein the cleaning surfaces (12, 42) lie opposite each other and define amongst each other a cleaning gap (44), further comprising a drive device, with which at least one of the cleaning disks (12, 42) is rotatable around its rotational axis (22) and a feeding device, with which the shredded plastic 56 can be fed between the cleaning disks (10, 40), wherein the cleaning surfaces (12, 42) of the cleaning disks (10, 40) each have a plurality of cleanings ribs (18, 46) extending between an inner and an outer edge (14, 16) of the cleaning surfaces (12, 42), wherein at least one flank (24, 28) of the cleaning ribs (18, 46) is tilted or bent with respect to an axial direction of the respective cleaning disk (10, 40), several cleaning webs (20, 48) progressing transversely to an extension direction of the cleaning ribs (18, 46) are arranged between at least some of the adjacent cleaning ribs (18, 46) the cleaning webs (20, 48) of the first and/or second cleaning disk (10, 40) each rise in a ramp-like manner in a radial direction of the cleaning disks (10, 40) and the cleaning webs (20, 48) of the first cleaning disk (10, 40) have a lower height than the cleaning ribs (18, 46) of the first cleaning disk (10) and/or that the cleaning webs (20, 48) of the second cleaning disk ( 48) have a lower height than the cleaning ribs (18, 46) of the second cleanings disk (48),
wherein said method includes the following steps: at least one cleaning disk (10, 40) is rotationally driven about its rotational axis (22) by means of the drive device, in which liquid, is fed into the cleaning gap (44) by means of a liquid feed device, wherein shredded plastic (56) is fed into the cleaning gap (44) by means of the feeding device, and wherein the shredded plastic (56) is conveyed through the cleaning gap (44).