A study on the needle heating in heavy industrial sewing

Li, Qinwen; Liasi, Evangelos; Simon, Dan; Du, Ruxu

doi:10.1108/eum0000000006281

Cited by 12 publications

(9 citation statements)

References 4 publications

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“…The previous researchers 4,19,20 have shown that the needle temperature reaches maximum/steady-state temperature after 10-15 seconds of continuous sewing. So the sewing needle temperature was recorded after 30 seconds of continuous sewing, as measured by the thermocouple, and is shown in Table 3.…”

Section: Resultsmentioning

confidence: 93%

“…However, the measurement of the temperature of the needle of a sewing machine during its operation difficult, since the needle moves at a very high speed 4 and its diameter is generally around 0.6-1.5 mm. Nevertheless, various methods for measuring needle temperature, such as infrared pyrometer, thermocouple and temperature sensitive waxes, have been used.…”

mentioning

confidence: 99%

“…There are few theoretical models available to predict sewing needle temperature. 4,8,16,17 Trung and Ku`s 16 used the finite element analysis (FEA) model, while Li and Liasi 4 and Howard and Parsons 17 have used analytical as well as FEA models and reported that the FEA approach gives much better accuracy compared to their analytical models, which had an average error of 25%, but these methods cannot be used easily on the sewing floor to predict the needle temperature.…”

mentioning

confidence: 99%

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Prediction of needle heating in an industrial sewing machine

Mazari

Bal

Havelka

2015

Textile Research Journal

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In industrial sewing, needle heating is a key problem that limits the further increase of sewing speed, and hence the productivity. Heat is generated during the sewing process because of friction between the needle and the sewing thread as well as between the needle and the fabric. The high temperature of the needle affects the quality and productivity of the sewing. The problem of needle temperature rise due to friction heat generation is considered in this paper and a simple analytical model is developed to predict needle temperature. The predicted needle temperature is compared with the experimental results by the inserted thermocouple method. Some of the process parameters, used as input variables, were also measured experimentally and experimentally observed values of needle temperature were compared with the theoretical prediction. It was observed that the temperature of the needle increases significantly with the presence of the sewing thread. Both the theory and the experimental results show that the needle temperature increases linearly with the machine speed within the ranges studied.

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Section: Resultsmentioning

confidence: 93%

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confidence: 99%

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confidence: 99%

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Prediction of needle heating in an industrial sewing machine

Mazari

Bal

Havelka

2015

Textile Research Journal

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“…A lot of heat is generated due to the needle penetrating the fabric substrate with high penetration force. Heat retained by the needle is concentrated in a small mass of metal and the temperature of needle may reach 300-350℃ within 3 seconds of running the machine (Li, Liasi, Zou & Du, 2001;Li, Liasi, Simon & Du, 2001;Liasi, Du, Simon, Dimitrejevic & Liburdi, 1999). Such a high temperature is detrimental to the hardness of the needle and also causes harmful heating to the sewing thread as well as the material being sewn in the region of the needle penetration.…”

Section: Dynamics Of Sewingmentioning

confidence: 99%

Dynamics of lockstitch sewing process

Midha¹,

Mukhopadhyay²,

Chattopadhyay³

et al. 2013

The Research Journal of the Costume Culture

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During high speed sewing, the needle thread is exposed to dynamic loading, short strike loading, inertia forces, friction, rubbing, force of check spring, bending, pressure, friction, impact, shock and thermal influence. The dynamic thread loading/tension alters throughout the stitch formation cycle and along its passage through the machine. The greatest tensile force occurs at the moment of stitch stretching, when the take up lever pulls for required thread length through the tension regulator. These stresses act on the thread repeatedly and the thread passes 50-80 times through the fabric, the needle eye and the bobbin case mechanism, before getting incorporated into the seam, which result in upto 40% loss in tensile strength of the sewing thread. This damage in the sewing thread adversely affects its processing and functional performance. In this paper, the contribution of dynamic loading, passage through needle and fabric, and bobbin thread interaction in the loss in tensile properties has been studied. It is observed that the loss in tensile properties occurs mainly due to the bobbin thread interaction. Dynamic loading due to the action of take up lever also causes substantial loss in tenacity and breaking elongation of cotton threads.

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“…Depending on sewing conditions the maximum needle temperatures range from 100°C∼300°C. This high temperature weakens the thread, since thread tensile strength is a function of temperature [1]. and infrared pyrometer [1,2] These experimental methods are accurate and reliable [2,3].…”

mentioning

confidence: 98%

Needle eye temperature measurement at different speeds of sewing

Adnan

Havelka

Mazari

2012

2012 International Conference on Engineering and Technology (ICET)

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In this article two methods are used to measure the temperature of needle eye during the high speed of sewing and the results are compared for calculating the precision in the measurement,Needle heatup is a big issue for apparel industry especially for automobile industry seat covers where a lot of synthetic materials are used which get damaged by needle heat at high speed of sewing machine,in this article thermocamera and thermocouple are used to calculate the precise temperature of needle eye and then 100% polyester 35x3 Tex thread is taken for sewing,the lockstitch sewing machine is run at 1000rpm,2000rpm and 3000rpm respectively and the both methods are used to obtain the accurate needle temperature and finally thread tensile properties the article is very helpful in predicting the exact temperature of needle in lock stitch machine at different stages of sewing process.Keywords-needle eye heat,needle temperature of sewing machine

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A study on the needle heating in heavy industrial sewing

Cited by 12 publications

References 4 publications

Prediction of needle heating in an industrial sewing machine

Prediction of needle heating in an industrial sewing machine

Dynamics of lockstitch sewing process

Needle eye temperature measurement at different speeds of sewing

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