Rieter

Sliver feed

Index

Fig. 8 – Front view of spinning box with opening roller and sliver intake

Fig. 9 – Spinning box cross-section

The  carded or drawn sliver being fed in is guided through sliver funnel [1]  (a) and fed between the feed shaft and spring-loaded feed table (b) to the rotating  Opening unitopening roller (c) (Fig. 8 + Fig. 9). Each spinning position is equipped with this combined feed shaft/feed table. The drive of the feed shaft for each spinning position is provided by a centrally driven, rotating worm shaft. In the event of an end down or a switched-off spinning position the feed shaft is disconnected from the worm shaft by an electromagnetic clutch and sliver intake is stopped. However, the clutch wheel of the feed shaft remains engaged with the worm shaft even if the spinning box cover is opened. This prevents damage to the clutch wheel when the rotor cover is closed, which can occur in systems where the drive shaft and feed shaft are disconnected when the cover is opened. Centralized setting of draft and delivery speed automatically determines the speed of the feed shaft and thus the intake speed of the carded or drawn sliver.

In systems where sliver feed is effected by means of a continuous feed shaft and spring-loaded feed table, the feed shaft is equipped with a brake/clutch unit at each spinning position, which switches off the spinning position in the event of an end down or in the absence of sliver.

[1] Sliver guides are available in standard size (for cotton, polyester and viscose fibers) or extended size (for acrylic and high bulk fibers).