Rubber gasket lower pin

Abstract

The invention discloses a rubber gasket lower pin. The shapes of any sections of the rubber gasket lower pin are the same, and the sections of the rubber gasket lower pin are basically in a T shape. The upper surface of the transversely linear part of the T shape is in a combination shape in which a straight line and a curved line are connected, the curved line part is higher than the straight line part, a height difference exists, the straight line part has a certain thickness, and the length of the straight line part is 4-4.9 millimeters. Correspondingly, the length of the curved line part which is connected with the straight line part is 20-19.1 millimeters, the distance from the highest point of the curved line part to the front edge of the straight line part is 9-9.9 millimeters, and correspondingly the distance C1 from the highest point to the tail end of the rubber gasket lower pin is 15-14.1 millimeters. The thickness of the straight line part is 2-5.3 millimeters, and correspondingly the height difference of the curved line part and the straight line part is 3.1-3.4 millimeters. The rubber gasket lower pin is simple in structure, convenient to mount and suitable for all existing ring spinning frames using curved face stair lower pins, the traction parts of the spinning frames do not need to be changed any more, and therefore the rubber gasket lower pin has wide applicability and economical efficiency.

Description

technical field [0001] The application relates to spinning drafting technology, in particular to the lower pin of the rubber ring of the drafting mechanism of spinning frame. Background technique [0002] At present, the drafting mechanism of the ring spinning machine in the spinning mill generally adopts long and short double rubber rings, spring swing pins, spring cradle pressurization, leaf spring cradle pressurization or pneumatic cradle pressurization devices, mainly relying on drafting rollers, Cots, aprons, elastic upper pins and curved surface stepped lower pins work together to control the fiber and realize drafting, and the intermediate additional friction force formed by the mechanism composed of the apron, elastic upper pin and curved surface stepped lower pin controls the movement of fibers , it plays a decisive role in ensuring the quality of the drafted sliver, especially the front jaw composed of the apron, elastic upper pin and curved surface stepped...

AI Technical Summary

Problems solved by technology

[0002] At present, the drafting mechanism of the ring spinning machine in the spinning mill generally adopts long and short double rubber rings, spring swing pins, spring cradle pressurization, leaf spring cradle pressurization or pneumatic cradle pressurization devices, mainly relying on drafting rollers, Cots, aprons, elastic upper pins and curved surface stepped lower pins work together to control the fiber and realize drafting, and the intermediate additional friction force formed by the mechanism composed of the apron, elastic upper pin and curved surface stepped lower pin controls the movement of fibers , it plays a decisive role in ensuring the quality of the drafted sliver, especially the front jaw composed of the apron, elastic upper pin and curved surface stepped lower pin. The curved surface stepped lower pin mainly supports the lower apron and guides the lower apron to rotate stably. Support the upper pin so that it is in the position required by the process, and the lower pin is a six-spindle pin, which is fixed on the roller seat. The upper surface is a combination of a straight line and a curved line, and the curved part is higher than the straight line part, with a height difference. It forms a stepped shape, and the straight part and the curved part have a certain thickness, which constitutes the curved surface stepped shape. This design is beneficial to tension the apron, strengthen the additional friction force in the middle, and improve the control degree of the fiber, so it is widely used. Adopted, but further research and experiments show that the lower pin of this shape can not effectively control the draft sliver fiber, and there is room for improvement. The design defect is: the straight line (plane) part of the lower pin The longer length makes the elastic force of the supporting apron weaker, which weakens the strength of the friction circle in the middle of the main drafting area, and the control force on the sliver is not strong enough, and the lifting force of the highest point of the lower pin curve part is also weak. Not enough, so that the drafting channel of the yarn sliver curve formed by the apron is relatively gentle, and the yarn sliver cannot be effectively controlled, which is not conducive to the high quality of the yarn

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