CS254100B1 - A set of picking nozzles for multi-color weft interchange on air weaving machines - Google Patents

Abstract

The solution relates to a system of interleaving nozzles for multi-color weft interchanging on air looms, comprising three or four interleaving nozzles directed into an interleaving channel. The axes of the interleaving nozzles pass through at least three vertices of an oblique parallelogram at the mouth of these nozzles.

Description

(54)

JADRNY VACLAV ing., MUNDL JIRI ing., BRNO

Set of pick nozzles for multi-color weft replacement on air weaving machines

The present invention relates to a plurality of picking nozzles for multi-color weft replacement on air looms comprising three or four picking nozzles directed into the picking channel. The pick nozzle axes extend through the at least three vertices of a rectangular parallelogram at the mouth of the nozzles.

254 100

254 100

BACKGROUND OF THE INVENTION The present invention relates to an interchangeable nozzle system for multi-color interchange on air looms comprising three or four interchangeable nozzles directed into the intercept channel.

On air weaving machines, several picking nozzles are used in multicolored wefts, which are usually arranged side by side, that is, the picking nozzle axes lie in one plane, mostly in a horizontal plane interspersed with the picking channel axis.

In a three or four-color swap, the weft from the third or fourth pick nozzle is thrown at a large angle to the pick channel axis, resulting in increased fabric errors, reduced machine performance, and poor weft clogging reliability.

Further, for a four-color weft interchange, it is known to arrange the pick nozzles in such a way that their axes at the mouth lie at the apexes of the square.

While this arrangement eliminates the problems arising from the large angle between the third and fourth nozzle axes when the picking nozzles are in the plane, it presents a new disadvantage that the picking nozzles are located in pairs one above the other, so that the picked wefts enter the picking channel in near its upper and lower edges, which also results in increased errors in weft clogging, reduced machine performance and deteriorated fabric quality.

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The above drawbacks are reduced or eliminated by a picking nozzle system for multi-color weft replacement on air looms, characterized in that the picking nozzle axes extend through at least three vertices of a rectangular parallelepiped at the mouth of the nozzles.

For the picking nozzle system, it is preferred that the picking nozzle axes pass through at least three diamond peaks at their mouth.

From the standpoint of the good functioning of the picking nozzle system, it is furthermore advantageous if the two picking nozzle axes lie in a horizontal plane interspersed with the picking channel axis.

An advantage of the picking nozzle system according to the invention is the increased productivity of picking the air loom by means that do not increase the cost of the machine. The conditions of weft entry into the picking channel are approximately the same for all picking nozzles of the system, thus ensuring a uniform weft insertion from each picking nozzle.

An exemplary embodiment of a picking nozzle assembly according to the invention is shown in the accompanying drawings, in which: FIG.

FIG. 2 is a view of the nozzle orifice nozzle arrangement for a four-color weft replacement system; FIG. 4 is a view of an alternative nozzle orifice nozzle arrangement for a four-color weft replacement system.

A set of picking nozzles 21, 22, 23, 24 for three or four-color weft replacement on air weaving machines consists of three or four picking nozzles 21, 22, 23 »24» which are fixedly fixed in the head 3 and the insert 4, which are deposited in a known manner on the weave of the weaving machine.

Fig. 1 shows a set of picking nozzles for trichromatic weft replacement. A view of the arrangement of the picking nozzles of the tricolor weft replacement system is shown in Fig. 2.

3 is guided by the axis 5 of the picking channel 6 which is formed in the beam 7 of the weaving machine. In the exemplary embodiment, the central picking nozzle is located below said horizontal plane, but may also be located above it. The axes of the picking nozzles 21, 22, 23 lie at the mouth of these nozzles at the apexes of the triangle, in the exemplary isosceles embodiment.

A view of the arrangement of the pick nozzles 21, 22,

23 and 24 of the four-color weft replacement assembly 1 is illustrated in FIGS. 3 and 4. In the exemplary embodiment 1 of FIG. 3, the axes of the four pick nozzles 21, 22, 23, 24 extend at the mouth of the nozzles. The axes of the rear and front picking nozzles 21 lie in a horizontal plane intersected by the axis 5 of the picking channel 6. Another alternative arrangement of picking nozzles 21, 22, 23, 24 is shown in Fig. 4, where the four picking nozzles 21, 22, 23, 24, the rhomboid peaks extend at the mouth of these nozzles.

In weaving, the picking nozzle assembly 21, 22, 23, 2b operates in such a way that the compressed air forming the picking medium is fed sequentially to the individual picking nozzles 21, 24 according to a program made on the basis of the desired color change. The weft (not shown) is entrained by the compressed air in the respective picking nozzle 21 to be placed stationary with respect to the remaining picking nozzles 21 Zb in the head 2 ^{on the} loom (not shown) and inserted into the picking channel 6 formed by the loom 7.

Claims (3)

Η 7ί 2 ϋ Μ * Τ OF THE INVENTION 254 100 1. Multi-color picking nozzle assembly on air looms comprising three or four picking nozzles directed to picking cinema, characterized in that the picking nozzle axes (21, 22, 23, 24) extend at the mouth of the picking nozzles (21, 22). 23, 24) by at least three vertices of a rectangular parallelogram. The picking nozzle assembly according to claim 1, characterized in that the picking nozzle axes (21, 22, 23, 24) extend at the mouth of the picking nozzles (21, 22, 23, 24). at least three diamond peaks. The picking nozzle assembly according to claims 1 and 2, characterized in that the two picking nozzle axes (21, 22, 23, 24) lie in a horizontal plane interspersed with the picking channel axis (5).