Joint lifting method used by rotor spinning frame for single-spindle roller feeding

Abstract

The invention discloses a joint lifting method used by a rotor spinning frame for single-spindle roller feeding, belonging to the technical field of spinning process. The prior art can not feed fiberraw materials in a speed-changing manner, therefore the jointing after yarn breakage can not satisfy the constant and saturated supply demand of the fiber amount within a short time, and the quality technical index of fine-quality medium and fine yarns produced by means of rotor spinning is influenced. In the method, each spindle is directly driven by an independent power to feed rollers; and in the case of yarn breakage, an electrical instruction is used for controlling the power of a spindle with broken yarn to drive the corresponding fed roller to sequentially act by following such speed orders as fiber strip withdrawal speed, high-speed pre-feeding speed, high-speed quantified feeding speed, roller feeding speed and normal spinning speed. The method can control the flow saturation degree of instant joint feeding, and even relieve the loss and damage caused by repeated static fiber bundle hammering by an opening roller after joint breakage, thereby fully improving the joint qualityand the whole-machine yarn forming performance of the rotor spinning frame.

Description

technical field [0001] The invention relates to a single-spindle independent feeding joint process of a rotor spinning machine, which belongs to the technical field of spinning process. Background technique [0002] The principle of the rotor spinning machine is that the fiber strips are fed to the rotary carding roller by the feeding roller, and the fiber strips are combed into single fibers by the carding roller, and then transported to the inner wall of the high-speed rotating rotor and placed in the condensation groove on the inner wall of the rotor. The ring-shaped strands form the yarn tail, and the yarn tail is twisted into yarn at the same time (wherein the stacking and twisting are usually together referred to as "rotor cup combined twisting") and drawn out to be wound into a bobbin. [0003] The feeding of fiber raw materials (fiber strips) on existing rotor spinning machines relies on feeding rollers, while most models use worm gear transmission. The power of this...

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Problems solved by technology

[0004] The technical problem to be solved and the technical task proposed by the present invention are to overcome the inability to meet the supply demand of a constant saturated fiber amount in a short time during jointing after yarn breakage caused by the inability of the prior art to feed fiber raw materials at variable speeds, which affects the rotor. To solve the defects in the quality technical indicators of spinning and producing high-quality medium and fine yarns, a method for lifting the joints of single-spindle feeding rollers for rotor spinning machines is provided

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