DE2007915A1 - Process for treating yarns and apparatus for carrying out the process - Google Patents

Description

The priority of British application no. 8380/69 of February 17, 1969 is claimed for this application taken.

The invention relates to a Garnbehandlüng before Winding the same on a chain harness or the like. And on a device for tensioning the yarn to it subsequently evenly and flawlessly on a twine or chain tree to be able to unwind.

In the event that a large number of ypn warp threads in a weaving mill is to be processed, it will be necessary to make one accordingly winding a large number of yarn threads onto a yarn or chain tree. Here, the is withdrawn from a supplier Yarn over spindles again on a yarn or chain

00 9848/1079 - ² ~

tree wound up, before being wound up through a pipe;

or the like (reed) runs. When the aligned tape yarn i (tape yarn) is rewound, some yarns tend to j to relax or to loosen, as these receive a larger yarn thickness in the spindle than other threads or because of the Overlaying the thicker yarn of the spindles with the other yarns to be rewound or rewound. For threads, which are round in cross-section, such a tendency does not exist, since these have the same thickness on the Assume yarn tree and have a lower resistance to lateral movement. To be considered here Shrinkage yarns also have other properties that result, for example, from the fact that these Yarns are not twisted or processed evenly by the spindles.

One disadvantage of shrink yarns processed in this way is that that these get caught or agglomerate after they have left the j tube to be passed through, so that as a result; the thread can break. ;

Another disadvantage of these yarns is the un-! uniform winding of the same on the chain boom, resulting in Degradation of the quality of the same can result.

The invention is based on the object of avoiding or at least largely reducing these disadvantages.

009848/1079 - 3 -

According to the invention, the object is achieved, inter alia. in this,

dal a method for tensioning a shrinkable j

. I.

Baren yarn to be wound up on a chain tree or the like

is created, with a process step in the heating there is at least the loose or slack yarn, so that this is tightened before being wound onto the tree or the like

The yarn which can be brought into contact with heated malts is preferably pulled through a tube, followed by ™ to be wound up on a twine or chain tree.

Another feature of the invention is the creation! a device for tightening under the action of heat j shrinkable yarn which is placed on a tree or the like is wound, with auxiliary means for heating at least the slack yarn are provided, so that the same thing before opening, wind on the tree or the like. Is tightened accordingly.

The accompanying drawings show an example training <leadership of the invention, and mean ^it!

Fig. 1 is a schematic representation of the invention used device for tightening heated shrink yarn and

FIG. 2 shows a perspective enlarged illustration of part of the device from FIG. 1

009848/1079 - 4 _-_

BATH ORIGINAL

According to the drawings, the device for stretching or for tensioning an aligned polypropylene single thread yarn from a yarn or chain tree 1 on which the yarn is wound will. For this purpose, the same comes from a delivery unit 2 to two horizontally arranged, vertically spaced from one another attached and freely rotatably mounted in a frame 3 heatable rollers 4 and 5. The two rollers 4, 5 are acted upon with steam, which through the bearing journals (i of the 4 and 5 is supplied to these and to a horizontal take-off roll 8. The roller 8 takes the heated one from the lower one Roller 5 running down (iarn. The tensioning device is between the delivery mechanism 2 carrying the spindle 9 and the one winding the yarn Chain tree 1 is provided, the yarn through a tube (reed) 10 and a roller in front of the chain tree! sjstem 11 runs through it. The rollers 4, 5 and 8 can rotate freely and have a matt surface. Such an i

I surface is applied to the rollers by means of a suitable covering, which is made of knitted glass fibers \

which are impregnated with polytetrafluoroethylene.

I The chain assembly rotates while the device is actuated 1 and pulls the yarn from the delivery unit 2. The yarn first runs over the upper circumferential surface of the upper heated one Vialzen 4, further around the rear side of the same and back over the front of the lower heated roller 5, ex finally over the overhead surrounding area of the take-off roller 8 to be removed continuously. Then it runs

009848/1079 -5-i

Yarn through the tube IO and subsequently through a roller arrangement 11 to the yarn or chain space 1.

Between the delivery mechanism 2 and the heated rollers 4 and 5, the yarn elongates or relaxes somewhat. While the yarn over the heated rollers 4 and 5 of time passes, it is heated to a temperature of about 93 ⁰ C, thereby subjecting it to a stretchable shrinkage. This shrinkage; causes a greater expansion and thus a slackening of the otherwise firm or tightly fitting yarn on the circumferential surface. As a result of the heating, the yarn is stretched to an even amount over the entire length. In this respect, bulges, entanglements or the like of the yarn in front of the tube 10 are avoided or at least prevented so that the yarn can be wound uniformly onto the yarn tree.

It should also be emphasized that the invention can be used wherever some shrinkage when heated ble yarns are wound or rewound. The rollers can either be heated up as described, i.e. with the help of steam, or any other conventional heat source can be used instead of this heating option.

009848/1079

Claims (1)

2Q07915 Claims e ^r l.) A method for tensioning heat-shrinkable yarn which is wound onto a chain structure or the like, characterized in that at least the loose or slack yarn is subjected to a hardening treatment to tighten it prior to being wound onto a chain beam or the like. 2. The method according to claim 1, characterized in that the Yarn drawn from a supplier, with heated rollers brought into contact and avf the Kstlenbaues or the like. wound up 3. The method according to claim i and 2, characterized in that the yarn passes over a first heated roller and a second heated roller below the first one. 4. Apparatus for performing the method according to claim 1 to 3, being heat-shrinkable yarn on a chain tree Or the like. Is to be wound up, characterized in that means for heating and thus tightening at least the Slack and loose yarn before winding onto the chain boom or the like. Are provided. 5. Apparatus according to claim 4, characterized in that the heating means consists of heated rollers. 8/1/179 ^; - 7 - BATH ORIGINAL 009848/1079 20Q7915_. β. Device according to claim 5, characterized in that the rollers of two spaced apart j j top and bottom rollers exist. ; 7. Apparatus according to claim 6, characterized in that the surface of the rollers with a central coating is provided. β. Device according to claim 7, characterized in that the cover made of woven polytetrafluoroethylene impregnated glass fibers.