Weft insertion device for air-jet loom and automatic adjusting method of weft insertion device

Abstract

The invention discloses a weft insertion device for an air-jet loom and an automatic adjusting method of the weft insertion device. The weft insertion device comprises a yarn stopping needle, an auxiliary main nozzle, a swing main nozzle, a weft detector, a main air bag, an auxiliary air bag, an electromagnetic valve control device, a main control computer, a display input device, an encoder, auxiliary nozzles and auxiliary spraying electromagnetic valves, wherein the auxiliary nozzles form an auxiliary nozzle group; the main control computer is electrically connected with the electromagneticvalve control device, the display input device, the encoder and the weft detector; the electromagnetic valve control device is in electrical signal connection with the yarn stopping needle, a first electromagnetic valve, a second electromagnetic valve and the auxiliary spraying electromagnetic valves; the auxiliary main nozzle is connected with the main air bag through the first electromagnetic valve; the swing main nozzle is connected with the main air bag through the second electromagnetic valve; the auxiliary nozzles are connected with the auxiliary air bag through the auxiliary spraying electromagnetic valves respectively. The jet starting time and the jet ending time of the auxiliary nozzles can be dynamically adjusted, the jet compressed air is minimized, weft insertion is stably conducted, and the labor amount of an operator is reduced.

Description

technical field [0001] The invention relates to the technical field of air-jet looms, in particular to a weft insertion device of an air-jet loom and an automatic adjustment method thereof, which can dynamically adjust the start and end timings of injection of auxiliary nozzles. Background technique [0002] The air-jet loom uses compressed air sprayed from the main nozzle and the auxiliary nozzle for weft insertion. In the prior art, the spraying angles of the main nozzle and the auxiliary nozzle are artificially set in advance according to experience, and then modified according to the weaving condition. This is the most common, but the problem with such a setting is that it is difficult to achieve the best weft insertion, that is, it is difficult to achieve stable weft yarn arrival and minimum compressed air consumption. [0003] Reference document 1, patent document CN 102534953 A, provides a method for setting the injection period of sub-nozzles of an air-jet loom, whi...

AI Technical Summary

Problems solved by technology

This is the most common, but the problem with such a setting is that it is difficult to achieve the best weft insertion, that is, it is difficult to achieve stable weft arrival and minimum compressed air consumption

The defect is that if the injection start time does not follow the adjustment, it may not only make the weft insertion fail to reach a stable state, but also cause waste of compressed air

This method uses the difference between the arrival time of a single weft yarn and the target arrival time to correct the opening / closing timing of the next weft electromagnetic valve, which is easy to make the special situation such as weft knots, thickness, fluff, reed friction, warp hairiness blocking, etc. The large sudden fluctuation of the arrival time of the weft yarn caused by the unevenness of the weft yarn is brought into the correction, so that the opening / closing timing of the solenoid valve fluctuates

In special cases, if there is a large deviation in the arrival time of the weft yarn due to weft yarn knots, thickness, fluff, reed friction, warp yarn hairiness, etc., if the opening / closing timing of the next weft solenoid valve is corrected according to this large deviation, It may lead to the weft insertion failure of the weft yarn that can be normally inserted in the next weft. This is the disadvantage of using the arrival time of a single weft yarn and the target arrival time to correct the on / off timing of the next weft electromagnetic valve.

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