JPS587733B2 - Open-end beer roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a beater roll consisting of a main body and a sawtooth wire spirally attached to the surface of the main body.

Beater rolls are already known in which a spiral groove is formed on the surface of the roll body, into which a sawtooth wire is pushed as a closure.

Such rolls are relatively expensive to manufacture.

Furthermore, a gap between the groove and the sawtooth wire is unavoidable, and this gap is generally reduced by a rolling operation.

The formation of this gap has a detrimental effect in open-end spinning.

The object of the invention is to provide a beater roll as described above which is simple to manufacture and can be reclosed with low expense, and furthermore does not have any gaps.

The purpose of this is to make the surface of the roll body cylindrical, and to construct a sawtooth wire with a root surface that extends horizontally at the root surface, with horizontal intervals between successive windings. This is achieved by winding under tension onto the surface and fixing only the ends to the roll body.

In contrast to the rolls in which miso is formed, the beater rolls according to the invention have no gaps, so they do not clog and have no clotting.
It has been found that the installation of g) is simple compared to known beater rolls.

Preferably, the cylindrical surface has grooves in which the ends of the serrated wire are clamped at points corresponding to their ends.

According to another aspect of the invention, the serrated root portion is wider than the teeth, thereby increasing the tilt resistance of the serrated wire wrapped around the roll body.

Advantageously, the coefficient of thermal expansion of the roll body is greater than that of the sawtooth wire.

Therefore, even if the temperature of the roll body increases, the tension applied to the wire wound on the roll body does not decrease.

The invention will now be described with reference to the accompanying drawings, which schematically depict one embodiment of the invention.

The beater roll shown in FIG. 1 consists of a roll body 1. The beater roll shown in FIG.

The roll body 1 has a cylindrical surface 2, the end face of which is bounded by a peripheral shoulder 3.

Grooves 4 are formed in the cylindrical surface adjacent to each of the two peripheral shoulders.

This groove 4 only extends over a short portion of the periphery.

A sawtooth wire 5 is wound spirally onto the surface 2 several times.

The first part of this bevel 5 is fixed in one groove 4,
The wire is wound onto the surface under tension with lateral spacing between adjacent windings.

The ends of the wires are secured within the other so that the wires lie under tension.

The wire can also be attached to the main body with adhesive.

FIG. 2 is a cross-sectional view showing the shape of a sawtooth wire.

As can be seen from FIGS. 3 and 4, the sawtooth wire includes a root section 6 which has a root surface 7 that is perpendicular to the root 8, ie the plane containing the teeth.

The toothed portion 9 of the wire is thinner than the root portion 6 and the teeth converge to a point at its distal end, but its tip 10 is somewhat blunted.

A typical sawtooth wire has a tooth height of 2 to 5 m.
m, the tooth spacing is approximately 3mm, and the width of the root portion is approximately 1mm.
It is.

As is clear from FIG. 2, the end of the wire extends into the groove 4, which is present in the peripheral direction, and the wire is firmly fixed in the groove by deforming the sides of the groove.

The fixed end of this wire has no teeth.

Of course, the sawtooth wire can have a cross section different from that shown in FIG.

For example, the face 7 of the wire can taper conically towards the tip 10.

Further, it is not absolutely necessary to make the width of the root portion 6 wider than the width of the tooth portion.

Beater rolls can be reclosed in a very simple way.

For this purpose, the wire is pulled out of the fixation site of the miso and the miso is reformed if necessary.

However, this is not always necessary.

Because when you pull the wire out of the miso, the franc 2
This is because the ends of the wire with the new sawtooth can be pushed into the miso and fixed.

FIG. 5 shows a partial sectional view taken along line 1--2 in FIG.

As is clear from this figure, the end of the saw-toothed wire is inserted into the miso.

There are no teeth at the fixed site, only the root portion is fixed.

As a result, the wire is reliably fixed in the mill and there are no undesirable edges that could cause blockage of the effective tooth area of the roll.

The wire windings are laterally spaced apart from each other so that the spun fibers do not stop outside of the teeth of the beater roll.

Roll clogging is therefore essentially avoided.

[Brief explanation of the drawing]

FIG. 1 is an axial cross-sectional view of a beater roll according to the invention. FIG. 2 is a sectional view taken along line 1--2 in FIG. FIG. 3 is a cross-sectional view of the sawtooth wire in the plane of the teeth. FIG. 4 is a partial side view of the sawtooth wire. FIG. 5 is a partially enlarged view of the beater roll indicated by the broken line in FIG. 2. FIG. 1... Roll body, 2... Cylindrical surface, 3... Surrounding shoulder, 4... Groove,
5... Wire with sawtooth, 6...
Root part, 7... ...Virate surface, 8...
...Tooth base, 9...Tooth part, 10...Tip.

Claims (1)

[Claims] 1. In a beater roll for an open-end spinning machine consisting of a roll body and a wire with sawtooth spirally attached to the surface thereof, the surface of the roll body shall be cylindrical, and the bevel with sawtooth shall be the roll body includes a root surface extending transversely to the root surface and is wound helically onto said surface with lateral spacing between adjacent windings under tension; A beater roll having a sawtooth wire having only an end thereof fixed therein.