Rieter

Elimination of waste

Index

Waste elimination is very intensive and takes place under the licker-in by means of special devices. The classic cleaning assembly consisted of 1 - 2 mote knives and a grid, one half of which was made of slotted sheet and another half of perforated sheet. In this arrangement, elimination of foreign matter took place exclusively by scraping off on the mote knives. The grid sheets tend to serve as devices for guiding and holding-back fibers, i.e. they prevent additional fiber losses that could arise from ejection.

High-performance cards require alternative assemblies in order to be able to deal with the high material throughput. Accordingly, the lickers-in of such cards no longer operate with grids but with carding segments (4, Fig. 99).

In the last but one generation of the Rieter card, for example, the tufts are first guided over a mote knife (2), then over a carding plate (3), then again over a mote knife and again over a carding plate, before they finally pass to the main cylinder. The carding plates are fitted with special clothing (3a).

A trash mote knife with suction unit is assigned to the licker-in. With the effective opening in the chute the C 60 card with single licker-in provides much better opening than the C 51. The single licker-in opens the material tufts even more with absolutely minimal loss of sound fibers, and extracts coarse trash and dust gently.

Fig. 99 – Carding segments under the licker-in of the Rieter C 51 card

Fig. 100 – Single licker-in, Rieter C 60 card