Tube changing mechanism of spinning frame and spinning frame using the same and method of tube changing

Abstract

The invention provides a bobbin replacement method of a spinning frame and a bobbin changing mechanism thereof. The spinning frame includes a roving frame for hanging a roving bobbin, a drafting unit for drafting the roving, a spindle capable of high-speed rotation, and is sleeved on the spindle. The outer spun bobbin, the ring plate set outside the spun bobbin and the traveler set on the ring plate to drive the spun yarn to rotate, the spun yarn drafted by the drafting unit is wound on the spun bobbin rotating with the spindle. The spinning frame also includes a bobbin changing mechanism for collectively replacing the spun bobbins, and the gripping mechanism for clamping the spun bobbins by the bobbin changing mechanism is a mechanical automatic gripping and releasing bobbin mechanism. The pipe grasping mechanism of the pipe changing mechanism of the present invention is a mechanical automatic pipe grasping and releasing mechanism, which has a simple structure, does not need a driving source, and can effectively reduce costs.

Description

technical field [0001] The invention relates to the field of spinning machinery, in particular to the improvement of a spinning frame and its tube changing mechanism and a tube changing method using the tube changing mechanism. Background technique [0002] Spinning frame is a kind of spinning equipment that draws roving into spun yarn. Usually a spinning frame has hundreds or even thousands of spindle positions, and each spindle position has a bobbin driven by a rotating spindle. The drafted spun yarn is wound onto the bobbin. When the length is predetermined, it is necessary to remove the full bobbin from the spindle, and then replace the full bobbin with an empty bobbin and insert it into the spindle to continue spinning. The whole process is called doffing. A kind of doffing method of existing spinning frame is to adopt doffing trolley single spindle position to doff, and another kind is to carry out collective doffing to all spindle positions simultaneously. Because t...

AI Technical Summary

Problems solved by technology

In the existing collective doffing method, the tube grabbing mechanism on the cross arm mainly grabs the bobbin through an electrically controlled pneumatic switch, so that the tube grabbing mechanism corresponding to each spindle needs to be connected to the air source through a pipeline , and it is necessary to electrically control the ventilation and air closure of the pneumatic switch. The structure of the entire grasping mechanism is complex, and the control accuracy is high, resulting in high cost.

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