SU672241A1 - Method of weaving in a shuttleless loom - Google Patents

Description

(54) METHOD OF PRODUCTION OF FABRIC IN A COLLATERAL MOBILE MACHINE

I

The invention relates to textile production and can be used on pneumatic and hydraulic weaving machines.

There is a method of making cloth on shuttleless weaving machines, including measuring weft yarn, laying it through the throat of the base, surf and cutting the edge of the fabric 1.

The disadvantage of this method is the low quality of harsh tissues and an increased amount of waste.

The aim of the invention is to improve the quality of the fabric and reduce the waste of the raw material.

This goal is achieved by controlling the linear density of the edge of the fabric, comparing it with the specified nominal value, and measuring the weft yarn is performed depending on the comparison of the controlled and specified values, the linear density.

The drawing schematically shows a device that implements the proposed method.

The drawing shows the weft pack 1, weft thread 2, electromagnetic nitenate resident 3, the measuring drum

4, nozzle 5, confuser 6, scissors 7, suction tube 8, cloth 9, cut off edge 10, block 11 for measuring the linear density of the cutting edge, block 12 for inputting a predetermined nominal value of the linear density of the cutting edge TkVl, block 13 compared, thread guides 14, spool 15.

The device works as follows. The weft thread 2 is continuously wound from the fixed package 1, passes between the plates of the electromagnetic nitenate resident 3 and the system of thread conductors 14 and is placed in a helical groove on the surface of a continuous rotating metering drum 4. Simultaneously, the reed in the drawing is rigidly connected to the confuser, oscillating movement in a vertical plane. When the bird is moving forward, the confuser 6 descends below the tissue lower and weft thread 2 (attached to the confusion channel during the previous machine operation cycle) exits the confused channel through a horizontal groove, beads into the lower part of the fabric and cut with scissors 7 between the nozzle 5 and the left edge fabrics 9.- After this

The reed and the confuser 6 return to the initial state, in which the axis of the confused channel coincides with the axis of the nozzle 5, and remains in this position (the bird holds up for the time required to lay the next weft thread). During the retention stage, air under pressure is supplied to the nozzle 5, the special tooth of the hook resets the turns of the weft yarn 2 from the surface of the measuring drum 4, and the thread is laid with an air jet through the confusing channel to the suction tube 8, which holds the leading end of the thread due to discharges The cut edge 10 is wound on a special roller 15.

Before winding onto the coil 15, an edge passes through the sensor of a linear density measuring unit 11. A voltage proportional to the weight of a unit of length of the cutting edge, i.e. its linear density P, comes from the output of block 11 to the input of comparator unit 13. The voltage from block 12 is proportional to the nominal value P of the linear density of the cutting edge (the value of P is different for machines of different types and is determined based on the dispersion of the law of distribution of the lengths of threads applied to the confuser channel , and the permissible norms of under-threading to the fabric edge, on the one hand, and raw material consumption in the cutting edge, on the other hand). From the output of block 13 to the nitenate resident 3, a voltage is applied that determines the tension of the weft yarn 2 when it is wound on the measuring cell.

12}

drum 4. In the case of Р Р Рn, the voltage at the output of the block 13 increases its length on the measuring drum 4. At Р РН the device provides for the UHV-uchischuyu length of the weft thread 2 Htr of the metering drum 4, i.e., an increase in the length of the weft thread in the cutting edge.

The proposed method of producing fabric on the shuttleless loom ensures continuous maintenance of the average value of the linear density of the cutting edge at an optimal level, and therefore allows you to simultaneously increase the grade of harsh fabrics and reduce the waste of raw materials.

Claims (1)

1. USSR author's certificate No. 289626, cl. D 03 D 47/36, 1971.