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Method and device for inserting weft thread into a loom

A technology of weft insertion loom and weft yarn is applied to the shed of air-jet weft insertion looms and the fields of air-jet weft insertion looms, which can solve the problems of inaccurate control of weft insertion and the like.

Active Publication Date: 2008-10-15
ITEMA (SWITZERLAND) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For these reasons the control of the weft insertion is relatively imprecise even with the application of a corrected approximation of the weft tip position

Method used

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  • Method and device for inserting weft thread into a loom
  • Method and device for inserting weft thread into a loom

Examples

Experimental program
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Embodiment Construction

[0025] Figure 1 shows an embodiment of an air-jet weft insertion loom with the device according to the invention. The device for inserting weft yarn 2 into the shed (not shown in FIG. 1 ) comprises a yarn store 21, which may for example comprise a store drum 22; at least one accelerating nozzle 3, 4 to accelerate from The weft yarn that yarn storehouse is pulled out and conveys in the shed; A plurality of auxiliary nozzles 5.1a-c to 5.na-c, so that continue to convey the weft yarn in the shed; And one or more measuring sensors 7.1,7.2,17, such as one or A plurality of turns counters 7.1, 7.2 arranged on or in the vicinity of the yarn store 21 in order to detect the number of turns or partial turns withdrawn from the store drum 22; and / or arranged in the shed A weft thread detector 17 on the end on the intercepting side of the spool, in order to detect the arrival of the weft thread 2 introduced.

[0026] Also in the device of the present invention, at least one measuring sens...

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Abstract

A method for the insertion of a weft thread ( 2 ) into a shed of an air jet weaving machine ( 1 ) is presented in which the weft thread drawn from the thread store ( 21 ) is accelerated by means of an acceleration nozzle ( 3, 4 ) and supplied to the shed; the weft thread is transported further in the shed by means of a plurality of auxiliary nozzles ( 5.1 a-c to 5. n a-c); and measured values dependent on the speed of the weft thread and / or on the path traveled by the weft thread are measured in contact-free manner by means of one or more measurement pickups ( 7.1, 7.2, 17 ). In the method at least one of the measurement pickups is formed for multiple measurement within the weft insertion and is arranged at or after a first acceleration nozzle ( 3 ). Furthermore, measured values are measured in contact-free manner a plurality of times during the weft insertion by means of the at least one measurement pickup ( 6, 6.1 - 6.5 ) from which values for the speed and / or the path traveled by the weft thread are determined during the weft insertion; and the values determined during the weft insertion are used for the control of the weft insertion.

Description

technical field [0001] The invention relates to a method and a device for introducing a weft thread into a shed of a weaving machine, in particular an air-jet weft insertion loom, according to claim 1 or the preamble of claim 6, and also to A loom, in particular an air-jet weft insertion loom, is equipped for carrying out the method or is equipped with the device. Background technique [0002] During weft insertion in an air-jet weft insertion loom, the weft thread drawn from the yarn accumulator is accelerated by accelerating nozzles - mostly called main nozzles and tandem nozzles - and is injected into the shed, where the weft thread passes through the so-called Auxiliary nozzles or transfer nozzles (Stafettendüse) continue the delivery. In conventional air-jet weft insertion looms, the transfer nozzles are engaged and disengaged by a pre-selected pattern associated with a rotational fixation of the main shaft of the machine. [0003] In the document EP0554222A1 is descr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D47/30D03D47/27D03D47/34
CPCD03D47/3033D03D47/3053D03D47/34
Inventor K·伯克托尔德H·-D·斯科尔
Owner ITEMA (SWITZERLAND) LTD
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