Tension control unit of flexible material

Abstract

The invention discloses a tension control unit of flexible material, which comprises an air cylinder, a rotating shaft, a bull wheel, a small wheel, a potentiometer, an energy accumulator, a pressure regulating valve and a control system, wherein the two ends of the rotating shaft are respectively provided with the bull wheel and the small wheel; the energy accumulator and the pressure regulating valve are sequentially arranged on an air inlet pipe from the air inlet of the air cylinder; a first steel wire rope is connected on a piston rod of the air cylinder; the first steel wire rope is wound in a groove of the small wheel, and the tip of the first steel wire rope is fixed with the small wheel; a second steel wire rope is wound in a groove of the bull wheel, one end of the second steel wire rope is fixed with the bull wheel, and the other end thereof is fixed with a driven carrier roller; the potentiometer can feed back a received electrical signal to the control system; and the rotating speed of an unwinding motor can be controlled and regulated by the control system. The tension control unit can effectively ensure material changing and receiving of the equipment under the high-speed operating state of more than 300m / min and ensure constant tension of the material under the accelerated / decelerated or constant operating state of the equipment. The tension is controlled by the pressure; in addition, the tension control unit has simple structure, low cost, steady tension and convenient regulation and maintenance.

Description

technical field [0001] The invention relates to a control device for controlling constant tension unwinding of flexible coils on a fully automatic production line of disposable daily necessities. Background technique [0002] In the fully automatic production line of disposable daily necessities, there are two rolls of flexible raw materials for the production of products, each of which is equipped with two rolls, one roll is used and the other roll is spare, and the two rolls of raw materials are used alternately. During the use of raw materials, the required materials The tension (that is, elongation) is constant, which requires controlling the tension of the material when it is conveyed on the equipment. At present, the commonly used tension control methods are as follows: 1. Swing rod type storage, but the storage is limited in this way, it is difficult to adapt to the high-speed operation of the equipment when changing materials, and high-speed switching rolls cannot be...

AI Technical Summary

Problems solved by technology

At present, the commonly used tension control methods are as follows: 1. Swing rod type storage, but the storage is limited in this way, it is difficult to adapt to the high-speed operation of the equipment when changing materials, and high-speed switching rolls cannot be realized; 2. Heavy hammer gravity control The tension of the material, but affected by the inertial force, the material is easy to break during the operation of the equipment; 3. The servo motor controls the tension of the storage material, but the system is complicated and the cost is too high

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