Device for cleaning roller surfaces of a drafting system device

Abstract

The invention relates to a device on a spinning preparation machine, said device comprising: a drawing frame (1) for processing a fibrous material (G) moved in a conveying direction (F) through the drawing frame; a number of roller pairs arranged behind one another having upper and lower rollers (2, 3; 4, 5; 6, 7); at least two longitudinal scraper devices (9), the respective scraper edges (K) of which abut one of the upper rollers (3, 5, 7) in order to remove dirt and other impurities; and a suction hood (AH) arranged above the scraper devices (9) and connected to a vacuum source (U). According to the invention, in order to avoid accumulations of stripped components in the region of the scraper devices, and in order to improve suction, each of the scraper devices (9) is attached to its own suction channel (11, 12, 13), wherein the scraper edge (K) of each scraper device (9) extends beyond the suction channel thereof in the region of a first opening (O1), and the individual suction channels are secured to a base wall (8) provided with openings (B1, B2, B3), wherein each suction channel (11, 12, 13) is provided with a second opening (O2) opposite the first opening (O1) and facing one of the openings (B1, B2, B3) of the base wall (8), wherein the suction hood (AH) extends beyond the openings (B1, B2, B3) of the base wall, and is attached to the side of the base wall (8) facing the suction channels (11, 12, 13).

Description

technical field [0001] The invention relates to a device on a spinning preparation machine having a drafting system with a plurality of roller pairs arranged one behind the other including upper and lower rollers, with at least two elongated stripping devices and There are suction hoods connected to a vacuum source arranged above the stripping devices, each of which is in contact with one of the upper rollers with its stripping edge. Background technique [0002] In order to remove dirt and other constituents deposited on the upper rolls of the drafting system during operation, stripping devices are used in practice, the stripping edges of which come into contact with the circumferential surface of the rolls with a certain pressing force. For example, flexible strippers are used which contact the circumference of the roller at a certain angle of attack and with a certain prestress. The flexible stripper is usually fastened to a holder by which it is fastened to the drafting...

AI Technical Summary

Problems solved by technology

This in turn leads to an increase in the amount of material stripped by the stripping device per unit time

This can lead to the fact that currently known devices are no longer able to continuously remove stripped material (grime, fibers and other components mixed with honeydew) from the area of ​​the stripper

As a result, buildup can occur in this area and ultimately affect the drafting operation

As a result, on the one hand, the stripping function of the corresponding stripper is negatively affected, and on the other hand, when leaving the stripper, these deposits can enter the nip between the upper and lower rolls and thus have a negative impact on the drafting operation. Negative impact

This can lead to uneven fiber sliver formation downstream of the drafting system

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