A method and device for controlling the friction boundary of fiber strands in the main drafting zone of the ring spinning drafting mechanism

Abstract

A method for controlling the friction boundary of fiber strands in the main drafting area of ​​a ring spinning drafting mechanism. The drafting mechanism uses a grid ring as the yarn-drawing ring, and the upper shaft supporting the upper grid ring has two rotating pairs. The first rotation The pair is that the upper roller rotates around the axis of the middle and upper rollers. The rotation of the upper roller around the axis of the middle and upper rollers is to control the height of the upper roller relative to the lower roller, that is, to control the height of the second rotating pair. The second rotating pair is The upper curved panel (the parts that make up the upper curved panel) rotates around its shaft core, which is the fulcrum of the upper curved panel on the upper shaft, and the movement of the upper curved panel around its shaft core The rotation is to adjust the gap change between the upper curved panel and the lower curved surface in the fiber speed change area in the main drafting zone, or to adjust the pressure generated by the mesh ring on the fiber strands, thereby adjusting the distribution of the friction force in the main drafting zone. The shaft core of the Xiao axis only positions the front height, or the middle height, or the rear height of the upper Xiao curved panel, and the upper Xiao curved panel needs two fulcrums including the fulcrum of the Xiao shaft shaft core for positioning.

Description

technical field [0001] The invention belongs to the technical field of ring spinning, and relates to a method and a device for controlling the friction boundary of fiber strands in a main drafting area of ​​a ring spinning drafting mechanism. Background technique [0002] In the drafting mechanism of the ring spinning frame, the front drafting area formed by the front roller and the middle roller is the main drafting area of ​​the drafting mechanism. The main drafting area of ​​the traditional ring spinning frame adopts the upper and lower double belts. The loop yarn drawing method, through the apron yarn delivery system including the upper and lower aprons and the upper and lower pins, forms elastic clamping on the fiber strands, and the frictional force circle in the main drafting area ensures that the roving fiber strands can be evenly drafted , with the fierce market competition, energy reduction and consumption reduction has become the focus of attention. In the draftin...

AI Technical Summary

Problems solved by technology

[0002] In the drafting mechanism of the ring spinning frame, the front drafting area formed by the front roller and the middle roller is the main drafting area of ​​the drafting mechanism. The main drafting area of ​​the traditional ring spinning frame adopts the upper and lower double belts. The loop yarn drawing method, through the apron yarn delivery system including the upper and lower aprons and the upper and lower pins, forms elastic clamping on the fiber strands, and the frictional force circle in the main drafting area ensures that the roving fiber strands can be evenly drafted , with the fierce market competition, energy reduction and consumption reduction has become the focus of attention. In the drafting mechanism of the spinning frame, the middle roller driving the apron yarn drawing system has a large operating load. Therefore, people hope to cancel the apron or use Yarn guide rings with smaller rotational resistance can replace aprons. Patent CN200810097571.6 "A Negative Pressure Tube and Its Corresponding Spacer" proposes to use mesh rings instead of upper and lower aprons in the main drafting area, which can save electricity. Patent ZL201410528595.8 "A double S-curve soft drafting device" and patent CN201910486987.5 "A curved drafting system and spinning frame with the curved drafting system" propose some devices that use grid rings instead of aprons In the yarn drawing system, the upper and lower aprons with good elastic texture are canceled, and at the same time, the lower yarn drawing circles or the upper yarn drawing circles are reduced. When adjusting the roving process of different processes, due to the lack of Traditionally, the apron elastic clamping technical characteristics of the lower apron yarn delivery system has changed the friction force circle formed by the main drafting zone to the fiber strands, and the original friction force boundary control method is no longer applicable, simple Applying the old method will cause unreasonable and sharp changes in the distribution of the friction force, which cannot meet the process requirements and cause uneven drafting

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