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Application of cloth winding mechanism on air-jet loom

Application of cloth winding mechanism on air-jet loom

  • Categories:Trends
  • Author:
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  • Time of issue:2021-08-30
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(Summary description)According to the transmission properties, it can be divided into two categories: mechanical and electronic.

Application of cloth winding mechanism on air-jet loom

(Summary description)According to the transmission properties, it can be divided into two categories: mechanical and electronic.

  • Categories:Trends
  • Author:
  • Origin:
  • Time of issue:2021-08-30
  • Views:0

The function of the cloth winding mechanism is to take the already woven fabric away from the weaving mouth in time and quantitatively according to the requirements of the weft density of the fabric, and wind it on the take-up roller, so that the position of the weaving mouth will not change due to the introduction of new weft yarns, so as to ensure Weaving production can be carried out continuously.

1. Classification and process requirements of coiling mechanism

1. Classification According to the nature of exercise, it can be divided into two categories: intermittent and continuous.

According to the transmission properties, it can be divided into two categories: mechanical and electronic.

The mechanical intermittent reeling mechanism is not used by high-speed looms because its intermittent action will cause greater impact and wear between the transmission parts. On high-speed shuttleless looms, mechanical continuous winding mechanisms are widely used. Now more and more air-jet looms adopt electronic continuous winding mechanisms.

2. Coiling process requirements

(1) The take-up mechanism should ensure that the formed fabric is drawn away from the weaving mouth at a fixed length on time to obtain a fabric with a specified weft density. At the same time, the warp yarn released by the warp mechanism from the weaving shaft is drawn to the fabric forming area.

(2) The transmission movement should be accurate and stable to ensure uniform weft density, fast and easy adjustment of weft density, and the adjustment range should meet the technological requirements.

(3) The cloth roll should be light and easy to carry, and the package should be large to reduce the number of cloth falling; the tension of the roll should be uniform, the cloth surface should not be wrinkled, and the loading and unloading of the roll should be convenient.

(4) Manual operation should be simple and labor-saving.

The coiling mechanism is generally composed of coiling transmission, weft density adjustment, grip traction, winding forming, manual operation, and automatic length counting.

Transmission path Yarn supply side crankshaft—synchronous toothed belt—reduction gearbox—weft density conversion and reduction gear train—winding roller and winding pressure roller—sprocket on the winding roller—chain—flywheel—plane friction clutch—friction Shaft-cloth roll.

Winding forming mechanism: After the woven fabric is drawn away from the weaving mouth under the action of the holding traction mechanism, it is regularly wound on the cloth roll under the action of the winding forming mechanism under a certain tension. The winding forming mechanism is composed of a sprocket, a flywheel, a chain, a friction clutch, a cloth roll and a cloth roll clamping seat. The diameter of the roll is 100~600mm. During the cloth winding process, the diameter of the cloth roller gradually increases, and the resistance torque generated to the cloth roller under the same cloth surface tension condition will also increase. This requires an increase in the driving torque as the diameter of the cloth roller increases. Ensure that the driving torque can effectively drive the cloth roll to work. When the diameter of the cloth roller increases, the cloth roller detection plate in the mechanism is pushed to the back of the machine, which increases the positive pressure of the friction clutch, so that the driving torque of the cloth roller also increases with the increase of the diameter of the cloth roller. When the driving torque is greater than the resistance torque, the cloth roller rotates synchronously with the flywheel; on the contrary, the clutch produces a slip phenomenon, and the speed of the cloth roller is slower than that of the flywheel. In this way, the process requirement that the tension of the cloth is basically constant is guaranteed.

Manual operation mechanism: It is used for manual winding or reversing when the warp is drawn or the fabric has weaving defects. The structure is simple.

Length counting device: mechanical decimal counter with fixed length automatic shutdown function. According to the weft density of the fabric and the number of weft beating-up times, the fabric length is automatically calculated.

Electronic take-up mechanism

The electronic take-up mechanism can be combined with the let-off mechanism to adjust the position of the weaving mouth under the control of the microprocessor to improve the quality of the fabric.

Advantages of electronic winding mechanism:

(1) The weft density of the fabric only needs to be set directly on the computer or the keyboard of the control device, and there is no need to replace the weft density gear. The weft density range is large, which enhances the variety adaptability of the fabric.

(2) The weft density can be changed automatically as required during the weaving process. This is the most obvious and important feature of the electronic winding mechanism. This feature enables the loom to produce fabrics with variable weft density.

Organization summary:

(1) The transmission path of the winding roller: the rotation of the winding motor, the toothed belt and the toothed belt wheel, the worm in the winding gear box, the worm compound gear, the composite shaft, the winding roller gear, the winding roller, the winding roller Rotating at a certain speed ensures a certain weft density.

(2) The path of cloth is the same as that of mechanical winding.

(3) The drive of the cloth roll is the same as that of mechanical winding: the sprocket on the winding shaft rotates the roller chain and the flywheel is driven by the gear cloth roll of the tension device.

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