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USING THERMOGRAPHY TO IDENTIFY FLAWS IN THE SUNSTAR BUTTONHOLE SEWING MACHINE

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Author(s): Marius ┼×uteu | Liliana Indrie | Sabina Gherghel | Macedon Ganea

Journal: Annals of the University of Oradea. Fascicle of Textiles, Leatherwork
ISSN 1843-813X

Volume: XIV;
Issue: 1;
Start page: 89;
Date: 2013;
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Keywords: thermographic measurements | thermal image analysis | Flir Tools application | thermal degradation | needle | thread | polyester | wool | cotton.

ABSTRACT
The goal of this paper is to identify potential defects in sewing machines, by using infrared thermography. Thermographic measurements were conducted at the Clothing laboratory of the Department of Engineering and Industrial Management in Textiles and Leatherwork of the University of Oradea. The equipment used was a Flir E60 thermal imaging camera. Measurements were conducted on the SUNSTAR buttonhole sewing machine, in order to trace the temperature transfer from needle and thread to the fabric on which the buttonholes were sewn. Buttonholes were sewn on the following fabrics: polyester, wool and cotton, with an 0.8 mm needle, made by Schmetz company. The thermal images were analyzed using the Flir Tools software which was installed on a computer and it was observed that due to the small time interval required to sew a buttonhole, the temperature transfer conditions vary. An amount of thermal energy accumulates in the needle and the thread that was used assimilates the heat. It was noted that in the first 12-14 of operation the needle's temperature increased by a large amount, slowing down afterwards. Following the completion of several buttonholes on fabrics with a lower resistance to penetration, it was found that the needle temperature recorded much lower values, even in higher operating modes.
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