Control device for flying tension and flying time of weft of air jet loom and control method thereof

Abstract

The invention relates to a control device for flying tension and fly time of weft of an air jet loom, which comprises a weft tension sensor that is arranged between a weft accumulator and a main jet, and a flow control valve that is arranged between a corresponding auxiliary jet and an electromagnetic air valve of an air flow supply mechanism. The invention also relates to a control method: (a) the start and the close times of the electromagnetic air valve, a weft-stop pin and the flow control valve on the main control panel of the air jet loom are preset; (b) a main axis angular senor collects the angle signal of a main axis, a photoelectric weft-finder collects the time information of the weft when the weft reaches the weft catching side, and the weft tension sensor collects the tension information of the weft while the weft flies; (c) the main control panel of the air jet loom processes the various information and adjusts the start and the close time parameters of each electromagnetic air valve, each weft-stop pin and each flow control valve, thus saving the air flow, namely, reducing the weft tension level of a restricted flying period by comparatively low air consumption, while prolonging the time of a restricted flying stage and reducing the weft broken rate.

Description

technical field [0001] The invention relates to a weft insertion system of an air-jet loom, in particular to a device for controlling weft yarn tension and weft time during weft insertion of an air-jet loom and a control method thereof. Background technique [0002] The air jet loom uses airflow to achieve weft insertion. The weft insertion system usually includes a weft feeder, a main nozzle, a special-shaped reed, multiple auxiliary nozzles arranged along the reed width, and an air supply mechanism that provides air sources for the main nozzle and each auxiliary nozzle. The air supply mechanism includes an air storage bag and an electromagnetic air valve. During weft insertion, each nozzle sprays according to the opening and closing time of the electromagnetic air valve preset by the main control board of the air-jet loom, and the multiple auxiliary nozzles arranged along the reed width spray The airflow forms the weft insertion airflow, each injection of each auxiliary no...

AI Technical Summary

Problems solved by technology

The weft yarn can be divided into start-up phase, free flight phase and restrained flight phase during the flight process. The air consumption of each phase is substantially different, especially in the weft yarn restrained flight phase, so that the weft yarn can move from a high-speed state in a relatively short period of time. Stop, the traction force should be reduced, and in the prior art, the air supply pressure and air supply volume are the same in each stage of weft insertion, which not only increases the air consumption, but also because the traction force of each stage cannot be well controlled, the constraint The phenomenon of weft breakage in the flight stage is also serious, which affects the working efficiency of the loom

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