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Method for controlling draw device of spinning machine and controller for draw device of spinning machine

A technology of drafting device and spinning machine, which is applied in spinning machine, continuous winding spinning machine, textile and paper making, etc. It can solve the problem of not considering the unevenness of yarn

Active Publication Date: 2012-05-02
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, yarn irregularities due to twisting of the individual bottom rollers of the drafting unit are not taken into account

Method used

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  • Method for controlling draw device of spinning machine and controller for draw device of spinning machine
  • Method for controlling draw device of spinning machine and controller for draw device of spinning machine
  • Method for controlling draw device of spinning machine and controller for draw device of spinning machine

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Embodiment Construction

[0014] The following will refer to Figure 1-3 Preferred embodiments are described. In this preferred embodiment, the present invention is applied to a ring spinning machine having a pair of drafting devices arranged in the longitudinal direction of the spinning machine and on both sides thereof. figure 1 It is a schematic plan view showing each drafting device, in which the top roller is omitted. figure 2 is a graph showing the relationship between the draft ratio in the rear zone and the torque required for draft in the rear zone. image 3 is a line graph showing the change in speed of each bottom roller during the operation of the ring spinning machine. Notice: figure 1 The upper and lower sides of correspond to the left and right sides of the ring spinning machine.

[0015] refer to figure 1 , each drafting device 11 is a 3-roller type, containing front bottom roller 12, middle bottom roller 13 and rear bottom roller 14. The front bottom roller 12 is supported by a ...

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PUM

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Abstract

The invention provides a control method of a draft machine of a spinning machinery. A draft machine 11 has a front bottom roller, a middle bottom roller and a back bottom roller, which are each independently driven by driving motors. At least in a frame stopping stage, the break draft ratio of the draft machine is changed to decrease load torque from the fixed value in the normal operation.

Description

technical field [0001] The invention relates to a method of controlling a drafting device in a spinning machine and a controller for the drafting device in a spinning machine. Background technique [0002] In spinning machines such as ring spinning frames and roving frames, a large number of spinning spindles are arranged in the longitudinal direction of the machine. The spinning machine has a drafting device containing a plurality of bottom rollers driven at one end of the machine (gearbox end). The length of the bottom rollers is very long so that in starting the spinning machine the bottom rollers at the outer end of the spinning machine opposite the end of the gearbox are twisted and delayed. In particular, the bottom apron roller (or middle bottom roller) on which the apron is wound on each spindle is basically twisted, and the delay due to this twist can cause unevenness and breakage of the yarn. Yarn irregularities arise not only due to their delay in starting up th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01H1/14
Inventor 林久秋筱崎丰小岛直树藤井能理新美究
Owner TOYOTA IND CORP