4. Spinning Results
The
ACP Quality Package clearly improves the drafting process. The sector between
the front cradle opening and the front roller nipping line, which has so far
been critical, now contributes additionally to the drafting process in the main zone.
This substantially raises the quality level of almost all
yarn parameters which are influenced by the drafting process. No disadvantages
to the running properties of the ring spinning frame have been found. It has to
be pointed out, however that the correct cradle setting is of utmost
importance. The ACP Quality Package clearly reduces both frequent yarn defects
(IPI) and rare yarn faults (Classimat), so improvements can be registered in
all fault classes. Therefore the number of clearer cuts is substantially
reduced, maintaining the clearer settings.
The
optimized drafting process is further reflected by an improved mass irregularity
(Uster CV value) and results in an optimized utilization of fibre substance
(yarn strength). Improvements achievable in every individual case depend on
the raw material, staple length, roving twist and total draft.
Since the above-mentioned improvements are exclusively due
to the improved drafting process, their influence on the quality of conventional
ring-spun yarns, single EliTeYarns and EliTwistYarns is
almost identical. Yarn hairiness is nearly unchanged by ACP.
Table 1 compares the spinning results of compact yarns from
various spinning mills, once without and once with ACP.
5. Summary
On the traditional 3-roller double-apron drafting system of
the cotton ring spinning frame, the drafting process in the main zone has not
been optimal until now, because of the long distance between the two aprons and the front roller nipping line, which is caused by geometric constraints.
The ACP Quality Package by SUESSEN improves yarn quality
very considerably due to enhanced inter-fibre friction in this sensible zone.
ACP Quality Package therefore becomes an indispensable
spinning accessory in the drafting system of a modern ring spinning machine.
About the Author:
The author
is the Head of Technics & Engineering RS, Suessen
----------------------------------------
1 W. I. Budnikow, W. E. Sotikow and
others: "Grundlagen des Spinnens", Vol. III, Fachbuchverlag Leipzig
