Weft insertion device of air-jet loom

Abstract

A weft insertion device of an air-jet loom comprises a plurality of dents, each of which has a guiding recess forming a weft thread path which is divided into a first zone and a second zone located at the downstream of the first zone. The inclination angle of the innermost wall of each guiding recess in the first zone is smaller than the inclination angle of the innermost wall of each guiding recess in the second zone. And, distance between an orifice of each auxiliary nozzle before the first zone and any innermost wall situated in the first zone and adjacent to the orifice is larger than thedistance between an orifice of each auxiliary nozzle before the second zone and any innermost wall situated in the second zone and adjacent to the orifice.

Description

Technical field [0001] The present invention relates to a weft insertion device of an air-jet loom, wherein the weft insertion device is operable to introduce weft yarns by air jetted through a weft guide passage, which uses a weft insertion nozzle and a sub-nozzle The guide recesses of the profile reed teeth are formed. Background technique [0002] Air jet looms have been developed to ensure the stability and high speed of weft insertion. Japanese Patent Application Publication No. 5-86544 (first reference) discloses a weft insertion device for an air jet loom. The special-shaped reed of the weft insertion device includes a plurality of reed teeth arranged side by side. Each reed tooth has a guide recess recovered from the front surface of the reed tooth. Each guide recess is formed at its innermost wall and / or other walls with a surface that is inclined so that the guide recess becomes narrow in the weft insertion direction. The weft insertion path is divided into a first ...

AI Technical Summary

Problems solved by technology

When this method of the second reference is applied to the weft insertion device of the first reference, although the reed teeth in the second area of ​​the weft insertion path for stabilizing the flight position of the weft yarn, especially in the second area of ​​the weft insertion path In the first half of the first half, the inclination angle of the wall surface of the guide recess increases, but the desired high-speed weft insertion cannot be achieved due to the large distance between the sub-nozzle and the reed

Alternatively, more air consumption is required to achieve the desired high-speed weft insertion

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