Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1996-07-23
1998-08-18
Mansen, Michael
Winding, tensioning, or guiding
Coil holder or support
Spool or core
B65H 5402
Patent
active
057948682
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND ART
The present invention concerns devices, apparatus and plants for spinning endless threads, in particular of synthetic filaments.
Certain problems in spin winding have been described in the journal "Chemiefaser/Textilindustrie", September 1991, from page 1002 on, in an article by the authors Fourne, Czase and Mears. According to this article rolls are provided to separate the spinneret take-off tension from the winding tension in the thread.
Said publication does not consider, however, the problem of the design height level of the arrangement nor of the operation of the plant. Problems of this nature are not negligible, as stressed in EP-C-80568. These problems are described also in U.S. Pat. No. 4043718 where one thread merely is to be handled. As described in the following in more detail within the scope of the present invention the problems of design height level, or of operating the plant respectively, are aggravated further where a plurality of threads (e.g. more than two threads) are processed on a single spinning position through to the winding process. The operating problems particularly make themselves felt during the threading-in process.
In winding a plurality of threads simultaneously also problems arise concerning the arrangement of the two rolls relative to the row of spinnerets on one hand and relative to the winder on the other hand. These problems have led to most diverse proposals. Thus, the so-called parallel winding method is known in which the guide surfaces (the rolls) extend parallel to the row of spinnerets and to the chuck axis. Examples of arrangements of this type are found in GB 1415947, EP 539866 and DE 4406995. This arrangement proves advantageous as all the threads can be processed under the same conditions. The arrangement is cost-intensive, however, and thus can be applied just in a few isolated cases. The so-called "90.degree.-winding" method proves less cost-intensive, in which arrangement the row of spinnerets is arranged at right angles with respect to the chuck axis. Geometry of the thread path in this arrangement can cause problems.
In connection with the 90.degree.-winding method an arrangement also is known in which the first (take-in) roll is arranged neither parallel nor at right angles with respect to the chuck axis but at an angle as indicated in U.S. Pat. No. 3,862,722. According to U.S. Pat. No. 3,544,017 the first roll is to be arranged at right angles and the second roll parallel with respect to the chuck axis. According to U.S. Pat. No. 3,720,382 the thread path between the rolls is to be laid out horizontally. According to U.S. Pat. No. 3,279,711, U.S. Pat. No. 2,869,796 and U.S. Pat. No. 3,844,496 both rolls are arranged at right angles with respect to the chuck axis. Other systems (e.g. according to U.S. Pat. No. 3,036,784 or CH 273678, or U.S. Pat. No. 4,351,492, or U.S. Pat. No. 4,566,643) have not been described or shown completely and thus their actual arrangements can only be speculated on.
SUMMARY OF THE INVENTION
It is the goal of the present invention to create an arrangement which permits achievement of a low design height level and correspondingly facilitated operation and at the same time permits application of the 90.degree.-winding method under technologically favorable conditions (thread path geometry).
An apparatus according to the present invention in a first aspect comprises a roll arranged above the winder, the roll being provided with a rotatable thread guiding outer surface. The winder is laid out for building a plurality of thread packages simultaneously, and the apparatus is arranged in such a manner that it can supply a plurality of threads to the winder. The length of the outer surface and/or the distance between this surface and the winder chuck according to the present invention are to be chosen such that during the threading-in process the roll as well as the winder can be operated by only one operator. The roll in this arrangement is to be formed in such a manner that the threads can be distributed along the
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Patent Abstracts of Japan, JP 7034316, Publicatoin Date Feb. 3, 1995.
"Chemiefasern/Textilindustrie", Sep. 1991, pp. 1002-, by Fourne, Czase and Mears.
Busenhart Peter
Kretzschmar Willi
Wetter Kurt
Mansen Michael
Maschinenfabrik Rieter AG
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