Rieter

The condenser

Index

Sliver trumpets (infeed condensers) are mounted on a reciprocating bar (sliver traverse mechanism) behind the rear cylinder of the  drafting arrangement. They are designed to guide the sliver into the drafting arrangement. The traverse motion spreads wear evenly over the whole width of the roller coatings.

A second sliver condenser is provided in the break draft zone, also on a reciprocating bar, and a third is located in the main drafting zone. However, the latter rests on the moving fiber strand, without being fixed. The purpose of these condensers is to control the width of the fiber strand, since during drafting it continually tends to spread out. Spreading fiber masses are more difficult to maintain under control in drafting, and they cause unevenness. In addition, a widely spreading strand leaving the drafting arrangement results in high fly levels and hairiness in the roving, since the fibers either are not integrated (and are lost), or are held only at one end so that the second end projects as a so-called „hair“. The condensers should be adapted precisely to the volume of the fiber sliver. The appropriate dimensions can be found in tables.