Variable weft density weaving let-off mechanism

Abstract

The invention provides a variable weft density weaving let-off mechanism which comprises a frame, a let-off main transfer unit, a let-off amount tension self-adjusting feedback unit, a multi-arm faucet and a dynamically-controllable let-off amount control unit, wherein the dynamically-controllable let-off amount control unit comprises a first wire rope, a harness pulley, a steering wheel, a composite steering wheel, a third return spring, a third wire rope and an additional tension adjusting spring; the first end of the first wire rope is connected with a harness lift arm of the multi-arm faucet, and the other end is connected to the composite steering wheel through the harness pulley and the steering wheel component; one end of the third wire rope is connected with the composite steering wheel, and the other end is connected with the additional tension adjusting spring; the other end of the additional tension adjusting spring is connected with a weight suspension foot in the a let-off amount tension self-adjusting feedback unit; and one end of the third return spring is fixed to the frame, and the other end is connected with the composite steering wheel. The variable weft density weaving let-off mechanism can implement the requirements of variable weft density weaving for let-off amount dynamic variation on a common gripper loom, and has the advantages of simple structure and low cost.

Description

Technical field [0001] The invention belongs to the technical field of looms, and particularly relates to a warp let-off mechanism for variable-weft dense weaving. Background technique [0002] Variable weft density weaving is to follow a specific rule to distribute multiple different weft density zones on the same fabric according to the design requirements. The current ordinary rapier looms are equipped with mechanical intermittent warp let-off and mechanical intermittent winding device. A certain density can only be this density, and it cannot be changed dynamically. Imported machines or imitated imported machines are mostly electronic let-off and take-up configurations. Some of these machines use the timely controllability of the servo motor with the support of complex circuits to have variable weft density weaving settings. However, the current domestic rapier 90 % Is a domestic ordinary rapier machine. If you want to achieve variable weft density weaving, you must modify t...

AI Technical Summary

Problems solved by technology

[0002] Variable weft density weaving means that multiple different weft density areas are distributed on the same piece of fabric according to specific rules according to the design requirements. The current ordinary rapier looms are equipped with mechanical intermittent let-off and mechanical intermittent take-up devices. Set a certain density, it can only be this density, and cannot be changed dynamically

Imported or imitated imported machines are mostly equipped with electronic warp let-off and coiling configurations. Some of them have the function of variable weft density weaving setting by using the timely controllability of servo motors with the support of complex circuits. However, the current domestic rapier machines are 90 % is a domestic ordinary rapier machine. If we want to achieve variable weft density weaving, we have to refit the let-off and take-up parts and install complicated control parts in the electronic control part. The cost will be quite expensive. Some domestic loom manufacturers have designed It has an independent drive, electromagnetic clutch dual-way selective transmission, and a weft-changing mechanism combined with an electronic control part. Although two weft densities can be weaved according to a certain rule, both the mechanical part and the electronic control part are very complicated and have poor reliability. Adding a weft density requires cumbersome changes in the mechanical and electronic control parts

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