CS209464B2 - Stripping drum for the spindleless spinning machines - Google Patents

Abstract

An opening roller for open-end spinning machines comprises a cylindrical roller body having a saw- tooth wire wound helically onto its outer surface, the wire having a base region wider than that portion of the wire which is toothed, the wire being wound under tension onto the outer surface of the roller body and fixed at its ends to the roller body. Base regions of adjacent turns of the sawtooth wire are separated from one another by a gap. The radio of the height H to the width B of the base region is less than 1 preferably in a range 0.4 to 0.6. The height of the base region is preferably less than 0.5 mm and desirably equal to the maximum thickness of the tooth region. <IMAGE>

Description

(54) Combing roller for open-end spinning machines

BACKGROUND OF THE INVENTION The present invention relates to a combing roller for open-end spinning machines, with a cylindrical body and a saw wire wound in a helix on a cylinder housing, the saw wire having a heel extended against teeth, wound under tension on the combing roller housing and fastened at its ends the heels of the adjacent threads of the saw wire have a gap between them.

In a known combing roller of this type, saw wires that are normally on the market are used, for example, in carding machines for processing fibrous material. Such standardized saw wires are available and have a heel size of 1.3 and 1.5 mm.

It has been shown that such combing rollers fitted with a saw wire lead to a deteriorating yarn quality, namely to the unevenness of the yarn manifested by thin and thickened points, compared to the combing rollers where the saw wire base is embedded in the helical groove and clamped therein. Investigation of the causes led to the finding that the parallel position of the fibers distributed by the combing roller on the sheet is insufficient.

The purpose of the invention is to provide a combing roller in such a way that the yarn is not uniform.

It has been found that this can be achieved by using a saw wire in which the ratio k to the heel width is less than 1. Preferably, the ratio k to the heel width is 0.4 to 0.6. The heel height is preferably less than 0.5 mm.

Alternatively, the heel height may be equal to the largest tooth thickness, i.e., the tooth thickness at a location adjacent to the heel.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in conjunction with the exemplary embodiments shown in the drawing, in which FIG. 1 shows a comb roller in axial longitudinal section, FIG. 2 shows a section along II-II in FIG. 2 is a cross-sectional view corresponding to FIG. 2, and FIG. 4 shows a section of the saw wire in the direction of the arrow in FIG.

The combing roller according to FIG. 1 consists of a cylindrical body 1 having a circular-cylindrical casing 2 terminated at the ends by flanges 3. In the vicinity of the two flanges 3, a groove 4 is milled or cut into the casing 2. A saw wire 3 is wound on the sheath 2 in helical threads. The beginning of the saw wire 5 is clamped in one groove 4 and its end in the other groove 4, so that the saw wire 5 abuts on the cylindrical body 1 under tension.

The cross-section of the saw wire 5 of FIG.

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2, which corresponds to section II-II in FIG.

The heel 7 has a width B which is approximately twice the height H. The zlib 8 has a conventional construction and shape.

Giant. 3 shows a cross-sectional profile of another saw wire 5, whose heel 9 has a height corresponding to the thickness of the tooth 10. Such a profile can be made by bending the heel 9 by 90 ° from a rectangular profile wire. The ratio - height to width of the heel 9 can be easily selected.

Giant. 4 shows a side view of the saw wire S, the transition of the tooth 10 in the heel 9 being shown by a broken line.

Saw wires - - with - hook - with a small height to heel width ratio are not commercially available. These saw wires secure - however, when used as a combing coating - rollers where the foot of the wire is not recessed - into. . sheath grooves, substantially better yarn quality - than what is -attainable with saw blades - wires that are commonly available on the market.

Claims (4)

SUBJECT YNÁLEZU 1. A combing roller for open-end spinning machines, with a cylindrical body and a sawtooth - which is - - wound into - a helix on a cylindrical body, has an extended heel and encircles the - sheath under tension and is attached to it the ends of the adjacent threads of the saw wire having a gap between them, characterized in that the height to width ratio of the heel is less than or equal to 1. 2. The combing roller according to claim 1, wherein the ratio of the height of the saw wire to its width is 0.4 to 0.6. 3. A combing roller according to claim 1 or 2, characterized in that the heel height is less than 0.5 mm. 4. The combing roller according to claim 1 or 2, characterized in that the heel height is equal to the maximum tooth thickness.