Weft insertion method and weft insertion device for air jet loom
By setting a second main nozzle with a short piping in an air-jet loom and controlling the compressed air flow during the initial jetting, the problems of weft yarn damage and yarn disorder were solved, and a more stable weft insertion process was achieved.
CN116516554BActive Publication Date: 2026-07-24TSUDAKOMA KOGYO KK
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TSUDAKOMA KOGYO KK
- Filing Date
- 2022-12-21
- Publication Date
- 2026-07-24
AI Technical Summary
Technical Problem
In air jet looms, if the auxiliary main nozzle has a long piping, the weft yarn may be damaged by residual pressure airflow, or if the piping is too short, the weft yarn may become disordered, affecting the weft insertion effect.
Method used
In the weft insertion device, the piping of the second main nozzle is shorter than that of the first main nozzle, and the initial spraying period is set to a low flow rate at the start of spraying. The supply of compressed air is controlled by the second valve device to assist the main nozzle in adopting a stable flow rate or a low flow rate.
Benefits of technology
It effectively prevents weft yarn damage, reduces yarn posture disorder, simplifies the structure of the weft insertion device, and improves the weft insertion effect.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN116516554B_ABST
Abstract
Provided is a weft insertion method and a weft insertion device for an air jet loom. In an air jet loom provided with a weft insertion device, a first main nozzle for weft insertion is connected to a first valve device via a first pipe, and a second main nozzle as an auxiliary main nozzle is connected to a second valve device via a second pipe shorter than the first pipe. In the weft insertion device, each valve device is in an open state and compressed air is supplied to each main nozzle during a jet period from a jet start timing. In the air jet loom, damage to a weft yarn by residual pressure can be prevented, and disturbance of the weft yarn posture during weft insertion, which adversely affects weft insertion, can be suppressed. The invention is characterized in that, in the air jet loom, the action state of the second valve device is set to a state in which a flow rate lower than the flow rate during a stable state of the jet, i.e., a stable flow rate, is supplied, i.e., a low flow rate state, during an initial jet period set from the jet start timing.
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Citation Information
Patent Citations
JP2013096038A
CN101613903A
CN102587006A