Teijin Limited

Other

Bunji Hamasu

Mitsumasa Sasaki

Hiroaki Kusuzono

Shunzo Naito

Katsushi Kikuchi

Yoshiharu Imamura

Isao Miyazaki

A management method for fiber-processing and a management apparatus thereof, which can detect the occurrences of the selected monitoring events by monitoring the occurrences, can investigate the causes of the occurrences of the events by treating the events so that the factors of the occurrences of the problems can be easily determined whether they are attributable to the problem of the fiber-processing machine itself or the problem of supplied yarn, and can promptly accurately present countermeasures against the problems.

Management method for fiber processing and a management apparatus thereof

A yarn breakage position detecting device and method of detecting a yarn breakage position involves a running yarn tension detector arranged at a reference position and that outputs a tension signal by which occurrence of yarn breakage is detected, and passage of the end of a broken yarn through the reference position is then calculated based on the time period from occurrence of yarn breakage to passage of the broken yarn end through the reference position. The yarn breakage time is stored as a time at which the tension signal becomes a peak value and/or a time at which the tension signal begins to decrease below a steady state tension value. The time when the yarn passes through the reference position is stored as a time at which the tension signal becomes lower than a lower limit value and/or a time at which natural oscillation begins.

Method for detecting break point of thread and apparatus therefor

A draw-false twisting management system that measures untwisting tension with an untwisting tension sensor (,) and diagnoses trouble in a draw-false twisting machine, wherein the measured values are subjected to fast Fourier transform online by fast Fourier transform means (,), the untwisting tension signal is monitored in a frequency domain, a pattern is extracted for the integral value (area value) or peak value in a specific frequency band, and a comparative judgment against a preset reference pattern is made by trouble-judging means (,), which judges that trouble has occurred in the draw-false twisting when the value falls outside of the reference value range.

Draw-false twisting management system

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Matsuyama, Japan

Bunji Hamasu