DE2364544B2 - Opening roller for open-end spinning machines - Google Patents

Description

The invention relates to an opening roller for open-end spinning machines, with a cylindrical roller body with a grooveless outer surface, on which a sawtooth wire is helical and under tension is wound, which has a wider than the teeth foot area and with its ends is attached to the roller body.

There are already such rollers for carding purposes known (CH-PS 4 97 561, CS-PS 143 415), in which the Foot areas of adjacent turns of the sawtooth wire butt against each other and where the one side surface of the sawtooth wire has a groove that extends to the foot surface, under which the Can grip the foot area of an adjacent turn. Although avoids this formation of a carding roller the clogging of the same, since there are no radial gap spaces, but the sawtooth wire a complicated cross-sectional shape that makes it more expensive to manufacture. Besides, the distance is Adjacent turns of the sawtooth wire are not freely selectable, but rather through the width of the foot area given.

With opening rollers for open-end spinning machines, where the conditions are different from those for Carding devices, such rollers have not yet been used.

The known opening rollers for open-end spinning machines comprise a roller body into which one Helical groove is incorporated, which receives the sawtooth wire, Such opening rollers are prone to clogging, require the use of tightly calibrated sawtooth wires, and are of limited use adaptable to different processing conditions.

The invention is based on the object of providing an opening roller that does not block the same has favorable columns, to create that is easier to manufacture and easier to follow can adapt to different processing conditions than known rollers. The solution to this problem consists in the fact that the foot areas of adjacent turns of the sawtooth wire have a clear distance have from each other. This makes it easy to use profiled sawtooth wires and the spacing the same can be freely selected to adapt to the operating conditions. The lack of in gaps running in the radial direction, there is no tendency for clogging, and the sawtooth wire needs

ίο not to be manufactured with tight tolerances. There Opening rollers for open-end spinning machines only have an average life of the order of magnitude of a hundred hours, the lower cost of the sawtooth wire is a major benefit.

The projection of the tooth area onto the outer surface of the roller body is preferably in its entirety Width in the area covered by the foot surface. This increases the stability of the sawtooth wire increased According to another development, the roller body has a higher coefficient of thermal expansion than the sawtooth wire

This ensures that even when the opening roller is subjected to high loads, the tension of the Sawtooth wire does not wear off. The foot surface of the sawtooth wire can also be connected to the outer surface of the Roll body be glued.

The invention is explained in more detail below with reference to drawings. It shows
F i g. 1 shows an axial section through an opening roller

-ίο according to the invention;

FIG. 2 is a cross-section along line 11-11 of FIG

F i g. 3 shows a cross section through a single tooth of the sawtooth wire,

J5 Fig.4 is a side view of a piece of a Sawtooth wire.

FIG. 5 is a larger illustration of the area of the lickerin roller, shown in broken lines in FIG.
The in F i g. 1 shown comprises an opening roller

■) ·> Roller body 1, which has a circular cylindrical jacket surface 2, which is limited by circumferential shoulders 3 at their front ends. Near the two Circumferential shoulders a groove 4 is milled or sawed into the lateral surface, which is only extends over a short part of the circumference. On the lateral surface 2 is a spiral turns Sawtooth wire 5 wound, the beginning of the sawtooth wire being clamped in one groove 4 and the sawtooth wire under tension and with

so lateral distance between adjacent turns on the Jacket surface is wound. The end of the sawtooth wire is clamped in the other groove so that the Sawtooth wire rests under tension on the roller body. The sawtooth wire can also be used on the Roll body to be glued.

F i g. Fig. 2 is a cross-sectional view showing the shape of the sawtooth wire.

How even better from the F i g. 3 and 4 can be seen, the sawtooth wire has a foot region 6, which is a Has root surface 7 which extends normal to the flank 8 of the teeth, i.e. H. to a plane containing the teeth extends. The tooth area 9 of the sawtooth wire has a smaller thickness than the foot area 6, and the Teeth taper towards their ends, but can be somewhat blunted at the tips 10. A typical one Sawtooth wire has a tooth height of 2 to 5 mm, a tooth spacing of about 3 mm and a width of Foot area of about '. Mm.

It can be seen from Figure 2 that the end of the sawtooth wire extends into the groove 4, which in Circumferential direction and in which the sawtooth wire is clamped by deforming the side surfaces of the groove is. The clamped end of the wire has no teeth.

The sawtooth wire can of course also be other than that in FIG. 3 have shown cross-sectional shape. He can z. B. from the foot surface 7 to the tip 10 tapered conically.

The opening roller can be easily re-garnished. The purpose is made of the sawtooth wire pulled out the clamping points in the area of the grooves and milled the grooves if necessary. In most cases, however, the grooves do not need to be re-milled because the sawtooth wire is pulled out from the same the flanks of the groove are widened somewhat, so that the end of a new sawtooth wire can be pressed into the groove and then clamped. The raising of a new one The sawtooth wire is then carried out in the manner described above.

F i g. 5 shows a partially sectioned view along the line H-II of FIG individual, like turning the end of a sawtooth wire into a

ίο Groove protrudes The teeth are in the clamping area removed and only the tooth root is pinched. This ensures that the sawtooth wire Can be securely clamped in the groove and that no undesirable in the effective tooth area of the opening roller There are edges that could cause clogging.

1 sheet of drawings

Claims (4)

Patent claims: 1. Opening roller for open-end spinning machines, with a cylindrical roller body and a on the outer surface of the same helically wound sawtooth wire, the one compared to the teeth has widened foot area and under tension on the lateral surface is wound up and attached with its ends to the roller body, characterized in that that the foot areas (6) of adjacent turns of the sawtooth wire (5) clear a Have a distance from each other. 2. opening roller according to claim 1, characterized in that the perpendicular projection of the Tooth area (9) on the outer surface of the roller body in its entire width in the by the Area covered by the foot surface. 3. opening roller according to claim 1 or 2, characterized in that the roller body (1) has a has a higher coefficient of thermal expansion than the sawtooth wire (5). 4. opening roller according to claim 1 to 3, characterized in that the foot surface (6) of the sawtooth wire is glued to the outer surface (2) of the roller body (1).