Spin-up method of semi-automatic open-end spinning machine

Abstract

The invention relates to a spinning-in method of a semi-automatic free-end spinning machine after shutdown of the semi-automatic free-end spinning machine resulted from, for example, electric power supply cutoff. The free-end spinning machine comprises a plurality of operating units which are positioned into a row or two rows in a manner that the operating units are adjacent to each other. The operating units are equipped with spinning units comprising spinning rotors. Before the spinning machine is started, operators clean the spinning rotors through removing bobbin yarns and impurities at the operating units of the spinning machine and measure the yarn length required by implementation of spinning-in treatment; after negative pressures in the rotors are recovered at least locally and / or provisionally, the operators introduce prepared yarn end parts into spinning-in positions at all the operating units of the spinning machine; and as long as the spinning machine is set to a standard operating mode, an instruction enabling spinning-in of the spinning units of the operating units of the spinning machine.

Description

technical field [0001] The present invention relates to a method for spinning-in of a semi-automatic open-end spinning machine after a stoppage of the semi-automatic open-end spinning machine, for example by a cut-off of the electric power supply, said open-end spinning machines comprising A plurality of operating units in rows equipped with spinning units comprising spinning rotors. Background technique [0002] Manually operated open-end spinning machines are usually provided with devices for the block spinning-in of the spinning machine after a complete stoppage for technical reasons or when starting a new job rotation or e.g. after a power failure . The collective spinning-in of the spinning machine improves the spinning machine utilization, but it has lower efficiency and lower joint quality, which depends on the mechanical conditions and the setting of the spinning machine, especially in the drawing and winding The arrangement of the coupling of the shafts during inv...

AI Technical Summary

Problems solved by technology

The collective spinning-in of the spinning machine improves the spinning machine utilization, but it has lower efficiency and lower joint quality, which depends on the mechanical conditions and the setting of the spinning machine, especially in the drawing and winding Arrangement of the coupling of the shafts during inversion, which leads to large differences in the quality of the joints along the spinning machine

Therefore, this method cannot be used in long semi-automatic spinning machines comprising up to 400 operating units, where after the introduction of the yarn into the drawing tubes of the spinning units, an automatic process initiated by the operator secures the joint quality

This individual joint has a quality comparable to that of an automatically operated spinning machine, and after a stoppage caused by a cut-off of the power supply, the collective spinning-in of the spinning machine reduces the quality of all winding bobbins, winding The bobbins would then have to be discarded entirely or sold at a significantly lower price

[0003] For this reason, the operating units of the semi-automatic open-end spinning machine are spun up one after the other after a standstill, which significantly reduces the productivity of the spinning machine