SU956641A1 - Method for inserting yarn in changing feed bobbins of doubling and drawing machine having individual brives of drawing and winding devices - Google Patents

Description

The invention relates to textiles. * industry, namely, to methods of threading when replacing feed packages on torsion-exhaust machines with individual drives of exhaust and winding devices.

There is a method of threading the thread when replacing the feed packages on a spinning-exhaust machine with individual drive drives of the exhaust and winding devices, by which the ends of the thread are connected to the knot and passed through the drawing zone at a preliminary release speed, and then increase the release speed to working .

The disadvantage of this method of refueling is an increased cliff. threads due to the fact that • when starting up the machine, the feed rollers are rotated by the thread, which causes additional friction of the thread along the roller, which leads to an increase in tension and, ultimately, to rupture of the assembly., which is unacceptable.

The aim of the invention is to prevent the rupture of the knot of the thread in the zone of drawing the thread.

This goal is achieved by the fact that according to the method of threading the thread when replacing the supply packages. on a torsion-exhaust machine with individual visual drives of the exhaust and winding devices, according to which ^k carry out the binding of the ends of the thread 5 into a knot and pass it through the drawing zone at a preliminary release speed, and then increase the release speed to the working one, after binding the ends (the threads report 10 preliminary tension by turning on the drive of the winding device and introducing the unit onto the winding device, and passing the unit through the pulling zone is carried out at a preliminary exhaust velocity of 10-20 m / min. A hedgehog shows a technological ^ 'refueling scheme for a worker ^ <of a machine for drawing synthetic 2Q threads.

The end of thread 1 is connected by a knot 2 with the beginning of thread 3 common [bobbin 4, newly installed on the creel. Then the drive of the winding device is turned on, after which the exhaust part of the Machine, $ as a result of which at the filling speed (10-20 m / min), the roller 5, cylinder • 6 and the exhaust element 7 begins to rotate, and the hour · * of the rotational speed of the roller ^ 5 is equal to the rotational speed 30 of the exhaust element 7 divided by the magnitude of the pull ratio.

At yarn release speeds of more than 20 m / min, the probability of a knot rupture in the pull zone increases sharply due to an increase in the dynamic forces acting on the knot. After receiving the unit by a winding device, the speed of release of the thread is gradually increased to the working one, with an acceleration rate of 10-15 s.

Examples of specific performance of the method.

At an initial thread release speed of 10 m / min, the acceleration rate is 10 s; 15 m / min 13 s; 20 m / min - 15 s, respectively.

Reducing the length of the threading process at each workplace from 30 s to 4 s, reducing waste by eliminating various forgings and reducing the percentage of breakage lead to significant savings in materials.

Claims (1)

Claim The method of threading the thread when replacing the feed packages on a spinning and exhaust machine with individual drives of the exhaust and winding devices by which the ends of the thread are connected to the knot and passed through the drawing zone at a preliminary release speed, and then the release speed is increased to the working one, revealing that , in order to prevent rupture of the knot of the thread in the zone of pulling the thread, after tying the ends of the thread, pre-tension is reported by turning on the drive of the winding device and introducing the knot to the winding device, and passing the node through the pull zone is carried out at a preliminary release speed of 10-20 m / min.