Piecing-up Package for Piecer Carriage Type I and II

Problems in piecing-up? The SUESSEN Piecing-up Package may solve them!

The following problems may happen in piecing-up:

1. Yarn-breaks during the transfer of the yarn from the piecer carriage to the winding head as a result of loss of tension at the second lifting of the take-up roller. Due to the centrifugal force in the rotor, the pieced-up yarn is slightly drawn back into the rotor. The resulting thick place causes an endbreak due to excessive twist.

2. End-breaks due to tension peaks when the takeup roller is getting into contact, as a result of the acceleration of the take-up roller speed from zero to standard speed.

Such yarns cannot be spun or only with certain restrictions. Solutions up to now have been the reduction of production speed, a general change of raw material or a modification of the blending ratios.

Examples of spinning mills:

  • different raw material dying
  • regenerated fibres
  • extremely high percentage of short fibres or combing noils
  • high delivery speeds, for instance with Denim
  • low twist multiplier, for instance with knitting yarns

A new fibre blend forced one of our customers to reduce delivery speed by 25% compared with his standard material, as otherwise he could not piece up. Thanks to the piecing-up package, he can use the same delivery speed for the cheaper raw material blend.

Another customer can increase delivery speed by 15% for a standard lot of knitting yarn, because the piecer carriage with piecing-up package produces safe piecing even at high delivery speeds.

A Spanish client had his raw material lot dyed in different colours. One of them could be spun perfectly, the other one could not be pieced up at all. After installation of the piecing-up package, both lots are running smoothly, even at a higher delivery speed.

The SUESSEN Piecing-up Package may be the solution:

To avoid loss of yarn tension during yarn transfer, the piecer carriage is equipped with a locking cylinder and modified cams.

This permits to eliminate the second lifting of the take-up roller and to optimize the movement of the lifter bail. Yarn tension is improved and yarn transfer to the winding head is more reliable. In addition, the take-up roller is pneumatically driven when getting into contact, so that tension peaks are avoided, which may cause end-breaks and laps on the take-up shaft.

Depending on sliver material and delivery speed, the locking cylinder can be activated or deactivated.