Method of optimizing internal negative pressure of vacuum device of textile machine for making cross wound bobbins
A technology of cross-winding bobbins and vacuum devices, which is applied to spinning machines, textiles and papermaking, and open-end spinning machines, and can solve problems such as increasing vacuum demand
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[0020] figure 1 The event E curve at the station is shown plotted against time t. Event E in this example is a broken yarn and broken yarn repair on the winder. A yarn break occurs at time 1. The cross-wound bobbin on which the yarn is wound is lifted by the bobbin drive rollers driving it and braked for time b. When at time 2, the cross-wound bobbin is stationary, it starts to switch to broken yarn repair. At time 3, the suction nozzles are in position to pick up the veil from the cross-wound bobbin, while the under-pressure gripper bobbin catches the ground yarn from the feed bobbin in the unwinding position. The period s1 contains all sub-processes until the end of the event, ie the end of the yarn joining cycle. Only during period s2 there is a higher vacuum requirement for successful yarn capture. A signal is sent at time 4 that the veil has been successfully captured and that higher negative pressure is no longer required. During time period s3, both the suction no...
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