A Tension Control Mechanism for Printing Machine Cloth

Abstract

A tension control mechanism of cloth of a printing machine comprises fixing plates, swinging arms, a tension roller component, and angle adjustment components, wherein each swinging arm is pivoted on each fixing plate by a pivot; a sliding groove is formed in each swinging arm, and internally provided with a rolling component capable of moving in a length direction of the sliding groove; first limit switches and second limit switches are arranged on the swinging arms; signal input ends of the first limit switches and the second limit switches are connected with a controller controlling a cloth feeding motor of the printing machine; the tension roller component is positioned at the outer side end parts of the swinging arms; the end parts of the tension roller component are pivoted on the rolling components; and the angle adjustment components are used for driving the inner side ends of the swinging arms to allow the swinging arms to rotate relative to the fixing plates. According to the mechanism, a tension roller slides along the swinging arms to trigger the different limit switches, correspondingly controls the on and off of the cloth feeding motor, and realizes automatic cloth feeding. Since angles of the swinging arms are adjustable, and the swinging arms can be fixed at the adjusted angles, tension force of the tension roller on the cloth is adjustable and can be kept constant; and the cloth tension is realized effectively.

Description

technical field [0001] The invention relates to a tension control mechanism for cloth of a printing machine. Background technique [0002] The tensioning mechanism is an important part of the printing machine. Its main function is to tension the substrates such as cloth to facilitate the transportation of the cloth and to make the cloth flat when printing graphics. [0003] see figure 1 , the existing tensioning mechanism comprises a fixed plate 51, a swing arm 53 and a tension roller 54, the inner end of the swing arm 53 is pivotally connected to the fixed plate 51 by a pivot 52, and the tension roller 54 is connected to the side of the swing arm 53 At the outer end, during the tensioning process of the tensioning mechanism, the swing arm 53 rotates around the pivot 52 to form different rotation angles. Under the pulling of the cloth, the tension roller 54 exerts a tension force on the cloth that changes with the sinusoidal law. When the swing arm 53 is placed in a ve...

AI Technical Summary

Problems solved by technology

Since the stretching length of knitted fabric and elastic fabric changes with the change of tension, the existing tensioning mechanism cannot realize the adjustment of the tension force. Therefore, after the cloth is printed, due to the disappearance of the tension force, Causes the graphics printed on the cloth to change, thus affecting the printing effect

Images