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Truetzschler IDF spinning helps shorten yarn processing.

Published: November 20, 2020

The IDF integrated draw frame direct spinning by Truetzschler helps in the shortening of processes with lower staff numbers and also provides a solution for tackling the increasing demand for spinning high-grade yarns from inferior raw material. Trutzschler makes machines and accessories for spinning preparation, nonwovens, and man-made fibre industry.

In 2013, Truetzschler developed the integrated draw frame IDF 2. The special feature was the reduction of two drafting zones to one. Thus, the IDF 2 responds to the increasingly urgent demands of our customers for production cost reduction on the one hand and a high quality standard despite poor raw material qualities on the other. This is because only the 1-zone drafting system allows particularly low drafts, which are the decisive guarantee of success for the processing of particularly short fibres, the company said in a media statement.

When using a normal-width drafting system, larger masses are accelerated and decelerated again during levelling, which can lead to increased energy consumption. For this reason the width of the bottom and top rollers of the IDF 2 has been reduced to the width of a sliver. This also allowed the introduction of the clever solution of rotating top rollers, which has led to a doubling of the service life before grinding.

The IDF 2 also introduced the sliver loop storage. This driven deflection roller levels the sliver loop by means of an integrated light barrier, resulting in perfect synchronisation between card and IDF. The levelled loop permits high change speeds. This ensures a higher efficiency at the card, especially when using small rotor cans. The combination of Truetzschler cards with IDF 2 gives customers an advantage, because they produce a thin, stable web which is perfectly suited to be drawn directly to the desired sliver count, at highest production rates and lowest drafts.

The IDF 2 has been established on the market for seven years. The advantages of the system are now recognised by the entire professional community, competitors and customers. Initially, the shortened process was only used with 100 percent cotton, preferably from the recycling sector, but today it is no longer limited to this. The system is successfully applied in the processing of 100 percent raw cotton and other materials. It thus offers an answer to the requirements of customers with regard to increasing and necessary flexibility in the production process.

The handling of the IDF has also been improved. For example, there is now a retention lock that prevents the cover of the IDF from always having to be opened completely during the piecing process. Similarly, the use of maintenance-free deep groove ball bearings entirely eliminates the need for relubrication at the delivery rollers: The number of lubrication points is thus reduced to four. The self-adjusting lap monitoring of the top rollers, already known from the draw frames, has now also found its way to the IDF. There is no need to readjust after grinding intervals and changed settings.

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