Shedding method of air jet loom

Abstract

The invention relates to a shedding method of an air jet loom. A heald frame moves to drive the upper layer and the lower layer of warp yarns to move, an opening is formed between the upper layer and the lower layer of warp yarns, and the weft yarns pass the opening; the distance between two crossing points at which the upper layer and the lower layer of warp yarns are crossed with the central line of the heald frame respectively is the height of the opening; and the height of the opening of the warp yarns on the entering weft side is less than that of warp yarns on the capturing the weft side. In actual application, if high-speed air current used for guiding the weft yarns reaches the entering weft side early, so that the height of the opening of the corresponding warp yarns on the entering weft side is controlled to be small; if the high-speed air current reaches the capturing weft side late, the height of the opening of the corresponding warp yarns on the capturing weft side is big, the quantity of motion of the warp yarns on the entering weft side is less than that of the warp yarns on the capturing weft side; and according to the time when the high-speed air current reaches the entering weft side and the capturing weft side, the height difference of the openings of the warp yarns is controlled from an angle of time, so that the quantity of motion of the opening of the warp yarns on the entering weft side is less than that of the warp yarns on the capturing weft side, which also meets the actual requirements of air jet weft insertion.

Description

technical field [0001] The invention relates to a warp opening method of an air-jet loom. Background technique [0002] The air-jet loom uses the shedding mechanism to execute the shedding movement of the warp yarn. The shedding mechanism completes the alternate lifting and lowering of the upper and lower warp yarns. pass within the allotted time. [0003] In the past, shuttles were used to insert weft on looms. The parameter design of the shedding movement should be considered from the perspective of the shuttle. The design of the shedding height mainly considers the size requirements of the shuttle entering and leaving the shed. The warp controlled by the heald frame on the same page has only one shedding height. The weft insertion medium used by the air-jet looms today is the airflow, and the high-speed airflow is much smaller in size than the traditional shuttle. Therefore, the air-jet weft insertion should no longer consider the size of the weft insertion medium, but t...

AI Technical Summary

Problems solved by technology

In addition, the speed of the loom in the past was only 100-200 rpm, but the speed of the current air-jet loom reaches 900-1000 rpm. To meet the high-speed requirements, the shorter the stroke of the shedding mechanism, the better. The design with the same height along the reed width is also wasteful for the current air-jet weft insertion, and the current shedding mechanism will generate a lot of useless force when running at high speed, which will cause large vibration of the bar and cause the warp to break

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