DE1435318C - Device for the continuous drawing of threads or the like - Google Patents

Description

Delivery roller 3. By means of a guide roller 9, the center line of which is the axis of the stretching roller under a If it crosses a small angle, the turns of the thread around the draw roller are spaced apart held.

The drawn thread 2 runs from the drawing roller 8 to an annular twisting spindle, not shown, by means of whose thread is twisted and wound up.

The stretching element 7 consists of two cylindrical pins 10 and 11 with a circular cross-section a diameter of 19 mm each, which are arranged parallel to one another and in contact with one another stand.

These pens are made of a ceramic material that contains more than 99% titanium dioxide - TiO ₂ . The surfaces of the pens are polished to a high gloss.

The following table shows the number of defects, based on 1 kg of yarn, at Yarns, the threads of which have been drawn over the two pins described above, compared to yarns, whose threads were only stretched over a single pin, which was of the same shape and size, like the two pins of the stretching device described above.

In the latter case it is a single pen.

Yarns of 630, 420 and 210 denier, all made of filaments, were used for the comparative tests of 6 denier.

The material of the yarns was a linear polyamide, namely nylon type 6.

210
denier 420
denier 630
denier Simple pen 0.50
0.33 0.310
0.075 0.55
0.25 * 5 double pin

As can be seen, when using a double pin according to the invention as a stretching element, the number of Significantly fewer errors.

When stretching over a single stretching pin, the results are achieved by applying a Straightening pin of larger diameter hardly or not at all improved.

1 sheet of drawings

Claims (2)

To obtain 1 .2 pens, they were made by a centrally supplied patent claims: led gas blown on, or they were embedded in a block of good thermal conductivity. 1. Continuous drawing apparatus All of these apparatus, however, have drawbacks of threads or the like made of thermoplastic, linear 5 afflicted. Polymers, consisting of a delivery and a So it has been found, for example, that a pull-off device and two in between individual stretching pins give rise to a fairly high level of arranged, parallel, cylindrical pins with a number of thread breaks and other defects each with a diameter of more than 10mm because there are kilograms of stretched product,
characterized in that the io against one of several pins stretching, two pins (10, 11) touch and that they are in a known manner from a ceramic device in which the pins are blown by gas or embedded in a block is made of a material. that it takes up quite a bit of space and 2. Apparatus according to claim 1, thereby being costly. Further, these stretchers are features in that the two pins (10, 11) are made easy to 15 due to the large number of pins to bemindestens 99% ^of titanium dioxide. damage. In the device according to the invention, these are Disadvantages eliminated. It is characterized by that the two pins are touching and that they are in on ao known way from a ceramic material The invention relates to a device consist. for the continuous stretching of threads or the like. It was surprisingly found that This extremely simple embodiment of the stretching consists of thermoplastic, linear polymers a delivery and a withdrawal device as well as organs to a remarkable decrease in the two interposed, parallel, cylindrical 35 number of faults in the thread leads, if the same in drical pins with a diameter of more than a full turn wrapped around the two pins than 10 mm. will. In a known device of this type to- Furthermore, it has been found that the uniformity if the thread first loops a stretched thread serving as a stretching element is larger than a thread, the first metal pin and then becomes one of the 30's by means of a series of arranged in a circle Fixing organ serving, is stretched at some distance from the first pin. Particularly good results Pin arranged second metal pin guided. you get with pins that have a diameter of The fact that the pull-off device has the thread with 15 to 25 mm. pulls off at a higher speed than the delivery device, a stretching is effected. During 35 at least 99% ^of titanium dioxide, This stretching process takes place in the material of which it has been found that in particular in Fadens an alignment of the polymer molecular chains of a high polish of such cones the number of in the longitudinal direction of the thread, which hand is held at a very low level in error Hand with a solidification of the same goes. can. The task of the stretching pin is to create such a clamping 40 If one considers the relative position of the pins to one another bring about voltage increase in the thread that this chooses so that they each other under a very small begins to flow on the stretching pin, so that angles cross with it, then it is loaded onto the pins Stretching point is set. Since this stretching end and the thread process proceeding from it are theoretically always found in the same place instead of a section at an appropriate distance from one another, becomes the thickness of the thread according to the behavior. stretch to be more uniform than without using an embodiment of the subject matter of the of such an extensor organ. finding is shown in the drawing. In practice, however, it has been shown that the over a thread tensioning device 1 is from a various stretching organs with respect to uniform supply reel, not shown, a thread 2 a and trouble-free stretching very differently from the delivery roller 3, which is also not supplied by one keep. In order to achieve the best results during the stretching process, the electric motor shown is driven, To achieve, therefore, many different To a slip of the thread 2 on the delivery roller Tried or suggested stretching devices. to avoid a pressure roller 4, the upper It has been assumed that all possible surfaces made of an elastic material, such as. B. cork Factors affecting the results of the stretching process or rubber is present on the delivery roller 3. the can flow, so z. B. the radius of curvature of the pressure roller 4 is freely rotatable in swing arms 5 stretching organ entwined by the thread, which supports, only one of which is shown. Temperature of the latter, the contact with the The thread is carried out with the help of a thread guide 6 in Thread, the surface quality, the material of the contact with the pressure roller 4 kept, namely Stretching organ, etc. 60 with a wrap angle of more than 180 °. As a result, stretching elements have already been developed beat that out of a thick pen, which if necessary to prevent the circumferential thread, the can be heated, or from a combination of thread guides 6 slowly in the axial direction of the pressure a plurality of pins arranged parallel to each other roller 4 shifted. After leaving the delivery roller 3 exist. 65 the thread runs around in a single turn In the latter case, several, in a stretching element 7 and then in several windings Mounted pins in a circle around a stretching roller 8, the peripheral speed of which arranges. At a constant temperature this speed is several times higher than that of the