DE1046825B - Device for the continuous treatment of stretchable single threads running close together, e.g. B. Artificial silk threads in liquid baths - Google Patents

Description

The invention relates to a device for the continuous treatment of closely adjacent ones stretchable single threads, e.g. B. rayon threads, in liquid baths, consisting of a row horizontally under the liquid level and at a distance from each other, driven transport rollers, for the thread sheet that alternately passes over or under the individual rollers.

There have been great difficulties with devices of this type. On the one hand there is for the purpose of avoidance from overstretching the need to keep the tension of the threads as low as possible, which requires almost the same circumferential speeds of all rollers. On the other hand, however, there is in turn, the need to increase the tension of the individual threads in order to prevent them from being knocked together and thereby to prevent a possible connection of the individual threads leading to thread breaks. A flawless one Finding the limit is very difficult and may not be possible when processing sensitive material with large expansion reserves.

The invention is based on the object of overcoming these difficulties.

The invention consists in providing one with a greater peripheral speed than the preceding Rolls revolving end roller and a front roller mounted at a smaller distance from this, whereby the leading roller not only rotates at a lower peripheral speed than the one downstream from it End roller, but also than the ones preceding it, with practically the same circumferential speed driven rollers. The surface of the pre-roller is present in a manner known per se Chimney-shaped depressions arranged transversely to the longitudinal axis are provided.

With such a roller system, the slowest rotating front roller towards the spinning side has the effect of where the threads are still plastic, a drop in tension, but at the end of the treatment section, namely between the front and the end roller, a certain increase in tension, which can be achieved by adjusting the peripheral speeds of the and the pre-roll is adjusted up to the tensile stress that is still acceptable in terms of the process and which is used for It is necessary to prevent the individual threads from beating together, becoming confused and thus sticking together without causing the threads to overstretch. The train engages below the bath surface because of the on the individual rollers co-rotating, slip-giving liquid film and because of the expansion reserve in the thread material over the preceding rollers. Since the previous reels with are driven practically each other at the same peripheral speed, they practice only a small one-Vorrictitung

for continuous treatment

closer together

stretchable single threads,

e.g. rayon threads,

in liquid baths

Applicant:

Paint factories Bayer Aktiengesellschaft, Leverkus en-B ay erwerk

Dr. Rudolf Hofmann and Dr. Wilhelm Hager,

Dormagen,
have been named as inventors

take care of the thread tension. The notches of the pre-roller surface hold back impurities and cause the diversion of any cross currents of the fleet in the direction of the thread path. With help of the device can the not yet deswollen individual threads in the spinning state below the bath surface pass through the bath at a greater speed than previously known, without that in spite of the larger wave movement of the bath, a knocking together, confusion and thus sticking together of the individual threads occurs.

In the drawing, an embodiment of the subject matter of the invention is shown schematically, and 1 means the end roller, 2 the front roller provided with the notches 5 and 3 and 4 the one with practically the same peripheral speed rotating input rollers of the system. With 6 is denotes the thread sheet running through the bath 7.

Claims (2)

Patent claims: 1. Device for the continuous treatment of stretchable single threads running close together, z. B. rayon threads, in liquid baths, consisting of a row horizontally below the liquid level and driven transport rollers arranged at a distance from one another for the thread bundle that the individual rollers 809 699/471 alternately over or under, characterized by one with a higher peripheral speed than the preceding rollers (3 and 4) revolving end roller (1) and one at a small distance from this mounted front roller (2), which not only rotates at a lower peripheral speed than the downstream end roller (1), but also than the preceding ones, driven with practically the same circumferential speed Rollers (3 and 4). 2. Apparatus according to claim 1, characterized in that the pre-roller (2) is known per se Way on its surface with chimney-shaped depressions arranged transversely to the longitudinal axis (5) is provided. Considered publications:
German Patent No. 500008;
Austrian Patent Specification No. 124 714;
U.S. Patent No. 2,334,325. 1 sheet of drawings