Compact Spinning Process

 Compact Spinning Process

Compact spinning is nothing but re-engineering of existing ring spinning process by attaching a pneumatic zone to existing ring spinning machine. Required improvement in yarn quality and yarn structure with the better use of fibre properties can be achieved with compact spinning process. 

The purpose of a compact spinning process is to spin the strands in the parallel form and completely close before twisting is delivered. This is the most important aspect of a compact yarn. This closer and equitable arrangement of the fibres immediately before the twist is delivered is bound to the advantages of the compact yarn.

Why compact spinning?

·        In conventional ring spinning, fibres in the selvedge of strand emerging from front roller nip do not get fully integrated into the yarn because of the restriction to twist flow by the spinning triangle These fibres show up partly as protruding hairs or as wild fibres

·        The spinning triangle exists because of higher width of the strand as compared to final yarn diameter. Further the fibres are tensioned to varying extent depending upon their position in the spinning triangle. As a result full realization of fibre strength is not achieved in the yam.

·        The hairiness gives a rough feel to the yarn. Variation in hairiness is a source of weft bars and warp way streaks in the fabric. Long protruding hairs from the yam contribute to multiple breaks in weaving and fabric faults like stitches and floats.

·        This problem is solved by applying the compact spinning systems that increases yarn quality At is carried out by means of narrowing and decreasing the width of the band of fibres which come out from the drawing apparatus before it is twisted into yarn, and by the elimination of the spinning triangle. It can be used for spinning both short and long staple yarns.

·        The compact spinning process produces a new yarn structure, which approaches the ideal staple fibre yarn construction even more closely. This has positive effects on raw material use, productivity, downstream processing, and on the product appearance.

 

Advantages of Compact Spinning –

1.      Higher yarn strength

2.      Better elongation

3.      Lower hairiness

4.      High consistency of all yarn parameters

5.      Minimal variation between spinning positions

6.      Better yarn evenness

7.      Lower imperfection value (IPI)

8.      Increase in production due to reduced yarn twist and higher spindle speed

Some of the compact spinning machines by Rieter

1.      Compact-Spinning Machine K 48

The compact-spinning machine K 48 produces compact yarns with highest performance and lowest energy consumption. The fully electronic drafting system FLEXIdraft provides extraordinary flexibility to the machine. The integrated individual spindle monitoring system ISM premium ensures a high level of machine efficiency.

 

2.      Compact-Spinning Machine K 47

The compact-spinning machine K 47 produces compact yarns using an extremely low amount of energy. With the semi-electronic drafting system, the machine meets all requirements for an economical yarn production. The integrated individual spindle monitoring system ISM basic can save about 3% of the personnel costs and makes the K 47 a highly efficient machine.

 

3.      Piecing Robot ROBOspin

The piecing robot ROBOspin repairs ends down in Rieter ring and compact-spinning machines. Automating this process ensures a high productivity, reduces labor costs and makes the operational organization of the spinning mill easier.

 

4.      Compacting Device COMPACTdrum

The compacting device COMPACTdrum for the Rieter ring spinning machine is easy to install and remove. It adds a new dimension to reducing hairiness, which impresses customers along with the very low production costs. The device processes all raw materials and covers all yarn counts.

 

 Source - Rieter