Control Method of Automatic Spin-up of Roving Frame

Abstract

The invention relates to a control method for automatic re-piecing of a roving frame. The control method comprises the following steps of: (1) selecting to-be-replaced spinning variety on an operation screen of a control system and setting a rotating speed of a bobbin in an automatic re-piecing process as 1.05-1.10 times of the rotating speed of the bobbin in a normal spinning process; (2) reducing a lower keel to an excessive descending position after the yarns spun by the roving frame are full after starting; (3) taking away a yarn-full bobbin, replacing an empty bobbin and putting the lower keel to a re-piecing position; (4) selecting automatic or manual control, running a roller, a flyer and the lower keel according to the normal spinning speed and direction in the automatic re-piecing process and running the bobbin along the normal spinning direction; (5) after re-piecing for 7-9s, stopping, and automatically resetting the rotating speed of the bobbin to the normal spinning speed; and (6) manually starting and entering into normal spinning state. According to the invention, the success rate of the automatic re-piecing is effectively increased; the re-piecing time is reduced; the production efficiency is increased; the yarn quality is stable; the production cost is lowered; the control method is suitable for the automatic re-piecing of the roving frame with or without an automatic yarn falling function.

Description

technical field [0001] The invention relates to a method for automatically spinning up a roving frame and belongs to the technical field of roving frames. Background technique [0002] At present, more and more complete sets of automatic doffing roving frame, thickness and fineness combined conveying system and collective doffing spinning frame are applied to textile enterprises, and the success rate of automatic head spinning is an important factor to verify the automation degree of automatic doffing roving frame index. [0003] At present, the spinning methods of the roving frame are mainly the hand spinning method and the automatic spinning method. [0004] The manual threading method is mostly used on roving frames without automatic doffing. It means that after the roving frame is full of yarn, the dragon ribs are lowered to the super-lowered position, and the full bobbin is manually removed, and the empty bobbin is replaced, and the dragon ribs are lowered. After risi...

AI Technical Summary

Problems solved by technology

However, because the control of the immobilization of the roller and the lower dragon rib and the reversal of the flyer and the bobbin are not part of the normal spinning time, it will not only affect the production efficiency, but also the control actions are cumbersome.

Secondly, the reversing of the flyer and the bobbin is a process of untwisting the normal yarn, and reverse twisting will occur after a long time, which not only affects the quality of the yarn, but also causes the Yarn breakage due to twisting or drifting above the flyer

Furthermore, the entire roving frame usually has more than 120 spindles, and the flexibility of the flyer pressing hand cannot be guaranteed to be consistent. The palm cannot be attached to the bobbin velvet belt. If the speed is too high, the flyer presser palm will bounce off the bobbin velvet belt, which will affect the success rate of automatic spinning

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