A warp let-off device with constant linear speed for weaving crepe fabric

Abstract

The invention discloses a constant-linear-velocity warp pacing device for weaving of crinkled crepe fabric. The device comprises a tooth form warp beam disc, crepe warps, a stopping hook, a rotary shaft, a dual-tension rod, a tension rod, a check ring, a spring, a gear, a worm, a worm gear, a bevel gear, a carrier gear, a winding gear, a winding rod, a winding wire, a crepe warp beam, a ground warp beam, a heald frame, a shed, wefts, the fabric and a winding roller. The braking resistance of each warp beam is reduced automatically and linearly as the backing-off diameter of the warp beam is reduced, constant warp run-in is realized, and the device has the advantages of being automatic, reliable, capable of achieving linear control and convenient to operate and maintain.

Description

technical field [0001] The invention belongs to the field of textiles, and in particular relates to a warp yarn constant linear velocity warp let-off device for weaving crepe fabrics, a constant let-off adjustment device for weaving non-seersque yarns, crepe fabrics, and other special surface effect fabrics. It can also be used for the weaving of weft tubular fabrics. Background technique [0002] Along with weaving on the loom warp direction partly or the fabric with full-width foaming and wrinkling effect, it is necessary to adopt biaxial weaving, that is, bubble warp beam and ground warp beam. For the warp let-off of the bubble warp beam, intermittent let-off is adopted, so that the yarn instantly increases the warp let-off amount relative to the ground axis, so that the warped warp yarn presents a wave effect, thereby presenting a crease effect on the cloth surface. [0003] However, the feature of the let-off process of the intermittent let-off is that the rotation ang...

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Problems solved by technology

[0003] However, the feature of the let-off process of the intermittent let-off is that the rotation angle of the soaked loom shaft is the same when unwinding each time the warp is let off, so when the unwinding starts, the unwinding radius of the weave shaft is large. According to the formula: circumference of rotation = angle of rotation × radius of gyration, then the let-off amount is large at this time. With the decrease of the unwinding radius, the let-off amount decreases continuously, so the let-off amount is uneven. The existing method adopts the combination of electronic let-off servo motor and tension strain gauge sensor , by pre-setting the upper and lower limits of the warp tension and the diameter, and comparing it during operation, when the rated value is exceeded, the constant line speed control cannot be achieved by adjusting the speed of the servo motor

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