Textiles: weaving – Special-type looms – Pushed shed pocket
Patent
1997-12-02
1999-09-07
Falik, Andy
Textiles: weaving
Special-type looms
Pushed shed pocket
139 1C, D03D 4100, D03J 100
Patent
active
059471620
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a series shed weaving machine with a weaving rotor which is equipped with insertion and beat-up combs and which combs through warp threads in the form of sheds from a laying-in station up to a cloth edge with the insertion combs at its periphery, while the weft threads are fed into the sheds from a weft thread preparation system, with the beat-up combs of the weaving rotor beating up the inserted weft threads at the edge of the cloth formed.
A series shed weaving machine with a weaving rotor is shown in the patent application EP-A-0 012 253.
DESCRIPTION OF THE PRIOR ART
The problem of fly, which collects at unsuitable places and of which as little as possible should be woven in, arises in series shed weaving machines as well as in weaving machines in general. Since the sheds in a series shed weaving machine are combed through in the form of intersecting warp threads, and since these warp threads are deflected under tension at the individual combs while the weft threads are being inserted, fly and heat arise in the insertion region between the laying-in station and the cloth edge.
For the example of a spinning machine, the patent application EP-A-0 580 028 discloses a tube-shaped work room for textile machines into which ambient air is blown that has been drawn from the installation room and conditioned at the machine in order to avoid a conditioning of the entire installation room and to convey the used air to the outside. The disadvantage of such an arrangement is that it can solve the problem of arising fly only to a limited extent, since the fly accumulates in all possible corners, crevices and dead air spaces.
Furthermore, it can not be imagined how a weaving machine, in which large quantities of air accumulate on insertion of the weft, can be encapsulated in this manner and how weaving in of the fly can be prevented.
SUMMARY OF THE INVENTION
The object of the invention is therefore to directly convey off the fly produced in a series shed weaving machine.
A further object of the invention is to convey off the heat produced in the series sheds.
This object is satisfied in that the weaving rotor is covered over by a cover forming a ring channel in the region of the combs from the laying-in station up to immediately ahead of the cloth edge in the direction of rotation, and in that suction nozzles are placed along the cloth edge which suck out from the ring channel the introduced air along with the arising fly.
The advantage of this arrangement is that a low pressure area and a strong air flow in the direction of rotation are produced in the ring channel thus formed, wherein the flow is augmented by the movement of the comb rows in the direction of rotation. Fly which originates on combing through the sheds is brought into the ring channel by the impulses from the insertion nozzles and wandering fields, by the suction effect in the ring channel as well as by the slight outward centrifuging action in the rotational flow, with the impacts on beating up of the weft threads acting to reduce friction at the points of contact with the fly. Further advantageous developments of the invention are specified in the dependent claims. Since an average clearance in the ring channel of less than 25 mm is maintained between the cover and the highest comb tips, a still tolerable suction power of the suction nozzles suffices to produce the required flow in the ring channel. In addition, due to the high velocities, size carried along by the air can deposit only to the extent of a low and harmless film thickness.
In order not to hinder the insertion of the weft thread and to maintain low pressures in the region of arrival of the weft thread, the constitution of the nozzle cross-section of the suction nozzles per unit length increases in the weft insertion direction. In order to capture the fly at the weft arrival side without congestion, the ring channel is extended outside the combs as a ring-shaped channel with a side wall sealed against the weaving rotor. An additional suction nozzle which si
REFERENCES:
patent: 3311135 (1967-03-01), Maguire
patent: 3921675 (1975-11-01), Filter
patent: 4291729 (1981-09-01), Steiner
patent: 4592393 (1986-06-01), Steiner
patent: 5738150 (1998-04-01), Roelstraete
Diaz Antonio
Grimm Peter
Steiner Alois
Falik Andy
Sulzer Rueti AG
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