Straight twisting machine

Abstract

The invention discloses a straight twisting machine, and belongs to the field of textile machinery. The problems that external yarn tension control is not accurate, and an optimum ballooning shape cannot be reached exist in the existing straight twisting machine. The straight twisting machine is characterized in that an external yarn sensor is arranged in an external yarn path between a twisting tray and an external yarn tensioner and used for detecting an external yarn linear speed and external yarn tension; a strand yarn sensor is arranged in a strand yarn path between an overfeeding device and an even twisting device and used for detecting a strand yarn linear speed and strand yarn tension; a motor sensor is arranged on a spindle drive motor and used for detecting a motor speed and current; the external yarn tensioner and an overfeeding wheel of the overfeeding device are respectively driven by separate motors; a control system connected with the motors is connected with the external yarn sensor, the strand yarn sensor and the motor sensor; and by taking the external yarn speed, the external yarn tension, the spindle drive motor speed, the current, the strand yarn linear speed and the strand yarn tension as parameters, the control system controls the external yarn tensioner to actively feed yarns at a constant speed or a variable speed, adjusts a strand yarn pulling speed, and ensures that a tension value of an external yarn can allow a wrapping angle to be minimum.

Description

technical field

[0001] The invention belongs to the technical field of textile machinery, and in particular relates to a direct twisting machine with low energy consumption and low noise. Background technique

[0002] Direct twisting machine is a kind of textile machine mainly used to directly combine two yarns into ply yarns, twist them into cords, and wind them into parallel bobbins. When combining and twisting, two strands of yarn are respectively introduced from two yarn packages, one of which is installed in the rotating spindle, and the other strand of yarn passes through the twisting disk of the spindle and passes outside the spindle , and then the two strands of yarn are merged into the twist leveler to form an inner yarn and an outer yarn, and the outer yarn will form a balloon during the rotation of the spindle. Before the yarn is introduced from the twisting disk to the balloon, the outer yarn is at least partially wrapped on the twisting disk, because the size...

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