Measurement and analysis of needle penetration forces in industrial high-speed sewing machine

Rocha

2020

Autex Research Journal

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In this paper, an industrial case study comparing the use of different needles in the production of hems in towels is presented. The study aims to assess the sewability of the fabrics, quantified by needle penetration forces. The market offers an interesting range of options for the needle, regarding the geometry of the needle point, surface finishing, and sizes. However, in practice, the choice is difficult, namely due to the lack of quantitative data that may support the empirical evaluation made by the sewing technicians. The work aims to assess how the needle type and size relate to the resulting needle penetration forces. Three terry fabric structures, produced by a home textiles manufacturer, were tested using needles of different sizes, points, and coatings. Needle penetration forces were measured on a sewability tester prototype, previously designed and developed, based on an instrumented overedge sewing machine. It was found that needle penetration forces present very significant differences with small size increments, needle coating also influences forces significantly, and different needle points produce only slight differences, significant only on some of the fabrics that were tested.

Section: Introduction and Objectivesmentioning

confidence: 73%

Section: Introduction and Objectivesmentioning

confidence: 99%

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Comparative Study of Needle Penetration Forces in Sewing Hems on Toweling Terry Fabrics: Influence of Needle Type and Size

Rocha

2020

Autex Research Journal

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“…A major modern concern in the mass production of sewn textiles concerns needle penetration force, a variable significantly influenced by needle diameter, needle surface finish, and fabric mass measured as thickness and density (e.g., Carvalho et al 2009; El Gholmy and Elhawary 2013; Gotlih 1997;Lomov 1998). Modern steel needles of small diameter and smooth surface finish require less penetration force than needles of large diameter and rough surface finish.…”

Section: Mechanics Of Needles and Use Damagementioning

confidence: 99%

North American Paleoindian Eyed Bone Needles: Morphometrics, Sewing, and Site Structure

Lyman¹

2015

Am. antiq.

Eyed bone needles have been recovered from Paleoindian sites over the last 70 years. Specimens 13,100–10,000 calendar years old average 1.81 ± .58 mm in diameter, similar to 2500–1000 year-old specimens in the Aleutians which average 1.67 mm in diameter. Use of industrial steel needles and experiments with replicated bone needles indicate the broken eyes and mid-length fractures of Paleoindian bone needles are the result of use. Some specimens said to be Paleoindian eyed bone needles are ≤ 3 mm in diameter and likely represent behaviors distinct from those with diameters ≤ 2.9 mm. Many smalldiameter needles have been recovered from sites that also produced ornaments. Small-diameter Paleoindian needles may have been used to attach decorative items to clothing; decorative items could have served as identity icons as human groups became sedentary and established home ranges a few centuries after colonization. Paleoindian residential sites that have produced multiple specimens of small-diameter needles reveal clustering of needle specimens in limited areas, and Varying degrees of association with hide-preparation and needle manufacture and maintenance tools such as gravers, scrapers, and awls. Paleoindians, like some ethnographically documented people and some industrial-age people, had sewing specific activity loci.

Journal of Engineered Fibers and Fabrics

“…His work is based on a sewing test rig whose development was initiated by Rocha et al [3,4]. A comprehensive state-of-the art of this subject is described by Carvalho et al [2,5]. Measurement of needle penetration forces whilst stitching fabrics in several stages of finishing are presented in this work.…”

Section: State-of-the-art Sewability and Measurement Of Needle Penetrmentioning

confidence: 99%

Cost and Efficiency Analysis of Commercial Softeners in the Sewability Behavior of Cotton Fabrics

Vidrago

Abreu

Soares

et al. 2015

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This paper reports a comparative case study on the use of different softening products for bed linen fabrics, specifically regarding the sewability of the fabrics. The market offers a wide variety of commercial formulations of softeners for this purpose, but the composition and price varies considerably. This work was aimed to assess the relationship between the cost and effectiveness of different softener formulations in home textiles finishing. Objectively, the effect of different softeners and their concentrations on sewability of the fabrics was studied. Non-ionic polyethylene dispersions and a cationic silicone softener microemulsion in different concentrations and combinations were considered in this investigation. It was found that a combination of silicone and polyethylene based softeners presents the most interesting cost/performance behavior.