DD146194A5 - REFLECTIVE ROLLER FOR OPEN SPINNING MACHINES - Google Patents

Abstract

The invention relates to an improved Aufloesewalze with a cylindrical roller body on which a Saegezahndraht is wound helical. By means of the invention, a better parallel position of the fibers separated by the break-up roll and thus a higher yarn quality are achieved. The object of developing a break-up roll which avoids the occurrence of yarn unevenness is achieved by using a wire sawn wire in which the ratio of the height to the width of the footing region is less than one.

Description

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Opening roller for open-end spinning machines

Areas of application .der. Invention;

The invention relates to an opening roller for open-end spinning machines, with a cylindrical roller body and a ^{u [} f the lateral surface of the same helically wound sawtooth ^{wire having} a ^{widened relative} to the teeth foot area and wound under tension on the lateral surface and is secured with its ends to the roller body the foot portions of adjacent turns of the sawtooth wire have a clearance from each other.

Characteristic of the known techn. Solutions :, In a known such an opening roller (DE-AS

2 364 544), commercially available sawtooth wires are used, such as e.g. already be used on carding or carding for carding fiber material. Such, already standardized sawtooth wires are available with foot areas at a height of 1.3 and 1.5 mm.

It has been found that such opening rollers compared to such opening rollers, in which the foot portion of the sawtooth wire is inserted and clamped in a helical groove, leads to a deteriorated yarn quality, namely to yarn irregularities in the form of thick and thin places of the yarn. An investigation of the cause of this has revealed that the parallel position of the fibers separated by the opening roller is insufficient.

the invention:

The invention has for its object to provide an opening roller of the type mentioned, which avoids the occurrence of Garnungunktigkeiten.

Explanation of the essence of the invention:

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It has surprisingly been found that this can be achieved when using a sawtooth wire, in which the ratio of the height to the width of the foot region is less than 1.

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Preferably, the ratio of the height to the width of the foot region should be 0.4 to 0.6. It is advantageous if the height of the foot area is less than 0.5 mm.

Alternatively, the height may be the foot area equal to the maximum thickness of the tooth area, i. equal to the thickness of the tooth area at the location adjacent to the foot area

Ausführun ^ sbeispiele:

The invention is described in greater detail below with reference to schematic drawings of several embodiments be written. Show it:

Figure 1 is an opening roller in axial longitudinal section.

Figure 2 is a section along the line II-II of Figure 4 by a sawtooth wire ..;

Fig. 3 is a sectional view corresponding to Figure 2 of another embodiment of a sawtooth wire.

Fig. 4 is a plan view of a piece of a sawtooth wire seen in the arrow direction of Fig. 2.

The opening roller shown in Fig. 1 comprises a roller body 1, which has a circular cylindrical, smooth lateral surface which is bounded at their ends by circumferential shoulders. Near the two circumferential shoulders is

in each case a groove 4 milled or sawed into the lateral surface, which extends only over a short part of the circumference. On the lateral surface 2, a sawtooth wire 5 is wound in helical turns, wherein the beginning of the sawtooth wire is clamped in the one groove 4 and the end thereof in the other groove 6, so that the sawtooth wire rests under tension on the roll body.

2 shows that the foot region 7 has a width B which is approximately twice as large as the height H. The tooth region is of conventional design and shape ,

3 shows the cross-sectional profile of another sawtooth wire in which the foot region 9 has a height which corresponds to the thickness of the tooth region 10. Such a profile can be produced by bending the foot area by 90 ° -ausgehend of a rectangular profile wire. The ratio of the height to the width of the foot region 9 "can be freely selected in a simple manner.

4 shows a side view of the sawtooth wire, wherein the transition from the tooth region 10 to the foot region 9 is shown in dashed lines.

Sawtooth wires with such a low height / width ratio of the foot area are not commercially available. Such sawtooth wires. However, when used as a fitting for opening rollers, in which the foot area is not embedded in grooves of the roll body, a much better yarn quality than can be achieved with commercially available sawtooth wires.

Claims (4)

j *, ο 1 K 7 7 7 - 1762 ^ ^{Ι0 ///} Invention claim: 1. opening roller for open-end spinning machines, with a cylindrical roller body and a coiled on the outer surface of the helical sawtooth wire having a widened relative to the teeth foot area and wound on the lateral surface under tension and is secured with its ends to the roller body, wherein the foot portions of adjacent turns of the sawtooth wire have a clearance from each other, characterized in that the ratio of the height to the width of the foot - 1 is. 2. Opening roller according to item 1, characterized g e k e η η records that the ratio of the height to the width of the foot area is 0.4 to 0.6. 3. opening roller according to item 1 or 2, characterized in that the height of the foot region is smaller than 0.5 mm. 4. opening roller according to item 1 or 2, characterized in that the height of the foot region is equal to the maximum thickness of the tooth region. 1 page drawings