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Article
Publication date: 31 May 2013

Niromi Seram and Darron Cabon

Ultrasonic seaming: the pertained technology for this research is identified as one of the alternatives which offers many advantages over traditional sewing. Ultrasonic

Abstract

Purpose

Ultrasonic seaming: the pertained technology for this research is identified as one of the alternatives which offers many advantages over traditional sewing. Ultrasonic technology was initially used for plastic welding. It has been utilized in automotive, electronics and electrical appliances, filtration, packaging, aerospace and apparel industries. However, the use of sewing machine, needle and threads still remains as the most popular method of joining fabrics together. The aim of this research is to investigate the possibility of constructing different types of seams for clothing using ultrasonic technology which is an existing technology that is not fully utilized and not fully realized the advantages associated with it in the apparel industry.

Design/methodology/approach

Experimental reflective practice' was used as the main method for practical investigation. The basis for analysis was formed by reflections made during and after the experimentations.

Findings

Though the construction of the seams are possible, due to thickness of the layers, LSc and LSe seam types were not successful in terms of quality. The bound seam type and the flat seams are possible using ultrasonic technology without the blade, the quality is not satisfactory when comparing to the conventional sewing technique. However, ornamental stitching (OS) and edge finishing (EF) with ultrasonic are possible and successful.

Originality/value

The results of this study will shed more light on ways of using ultrasonic technology in the apparel industry.

Details

International Journal of Clothing Science and Technology, vol. 25 no. 2
Type: Research Article
ISSN: 0955-6222

Keywords

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Article
Publication date: 1 May 1992

Shigeru Inui and Atsuo Shibuya

Seam pucker is one of the most important aspects of garment quality in the sewing process. Recently, automatic sewing systems have been developed and seam pucker or other…

Abstract

Seam pucker is one of the most important aspects of garment quality in the sewing process. Recently, automatic sewing systems have been developed and seam pucker or other defects would have to be automatically inspected in these systems. Two systems of automatic, contactless measurement of seam pucker have been developed. One of the measurement systems, with which surface shape of seam pucker was measured, is based on laser technology. Intensity of reflected ultrasonic wave is measured using another measurement system. The laser measurement system has been applied to moderate or severe seam pucker and the ultrasonic wave system has been applied to the accurate evaluation of very small seam pucker. The result of the evaluation by machine has to match the result of subjective evaluation by humans. To verify this, samples of seam pucker were evaluated using five judges. With the measurement data of surface shape of these samples, the power spectra of the wave form of seam pucker are calculated. Analyses and correlates the relationship between objective measurement and subjective evaluation by discriminant analysis, with the result of subjective evaluation and the power spectra of the samples. Having obtained these relationships, the degree of seam pucker can be measured objectively by both systems.

Details

International Journal of Clothing Science and Technology, vol. 4 no. 5
Type: Research Article
ISSN: 0955-6222

Keywords

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Article
Publication date: 4 March 2016

Hui Shi, Jianping Wang, Xiaona Chen, Shunhua Luo and Lingxi Zhang

An improved waterproof seam production technology (ultrasonic welding-thermo adhesive tape sealing (USW-TATS)) was developed in this study. The technology will improve the…

Abstract

Purpose

An improved waterproof seam production technology (ultrasonic welding-thermo adhesive tape sealing (USW-TATS)) was developed in this study. The technology will improve the waterproof performance of seam which has problem resulted from needle holes and thread like seam leaking and excess shrinkage.

Design/methodology/approach

Threadless seams were produced by ultrasonic welding (USW) with coated and lamination fabric to replace the traditional sewing process in Sewing-thermo adhesive tape sealing (S-TATS). The process efficiency was evaluated by Methods-Time Measurement (MTM). Seam performance including hydrostatic pressure, shrinkage and tear force was compared among three technologies (USW, USW-TATS and S-TATS). The effect of ultrasonic welding parameters (amplitude, roller pressure and roller speed) on the USW-TATS seam performance was investigated.SEM analysis was carried out to examine the condition and morphology of the joints cross section.

Findings

It was found that waterproof performance and dimensional stability of USW-TATS seam were superior to that of S-TATS seam. Tear force and hydrostatic pressure increased firstly and then decreased with the increasing of USW parameters in UAW-TATS process. Binary regression relationships were found between the USW parameters and tear force or hydrostatic pressure. Shrinkage decreased with the increasing of roller pressure and speed.

Practical implications

Research results can be applied to predict seam performance of waterproof clothing, reduce equipment parameters setting time and enhance product quality in industry.

Originality/value

A threadless production technology (USW-TATS) was proposed to improve waterproof performance and dimensional stability of outdoor clothing seams.

Details

International Journal of Clothing Science and Technology, vol. 28 no. 2
Type: Research Article
ISSN: 0955-6222

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Article
Publication date: 12 July 2013

Cun‐Cen Li, Ming Yang, Ya‐Fei Pang and Shi‐Yang Li

The purpose of this paper is to propose an optimization method by combining artificial immune algorithm and finite element analysis to find the optimal exciting electrode…

Abstract

Purpose

The purpose of this paper is to propose an optimization method by combining artificial immune algorithm and finite element analysis to find the optimal exciting electrode of a piezoceramic plate type ultrasonic motor vibrator.

Design/methodology/approach

The artificial immune algorithm is selected as optimizer for its merit of fast convergence to global optimal solution. The finite element analysis is used to calculate the motion trajectory of contact point. The objective function is the work that the vibrator does to rotor. The design variables are the boundaries of exciting electrode on piezoceramic plate vibrator surface.

Findings

The calculated results and the experimental results show that using this method, both the position and the size of optimal exciting electrode of this ultrasonic motor can be quickly and accurately determined.

Originality/value

In order to successfully design an ultrasonic motor, both the position and the size of the exciting electrode must be investigated, so as to change more electric energy into mechanical energy. In this paper, an optimization method by combining artificial immune algorithm and finite element analysis is proposed for the exciting location optimization of a piezoceramic plate type ultrasonic motor to obtain large power output.

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Article
Publication date: 13 June 2019

Rui Zhang, Lei Zhao, Dan Xie, Jinlong Song, Wendong Zhang, Lihu Pan and Yanhua Zhang

This study aims to simulate and test the performance of a transmitting and receiving capacitive micro-machined ultrasonic transducer (CMUT). Aimed at detecting demand of…

Abstract

Purpose

This study aims to simulate and test the performance of a transmitting and receiving capacitive micro-machined ultrasonic transducer (CMUT). Aimed at detecting demand of the CMUT, a matched integrated adjustment circuit was designed through analyzing processing methods of transducer’s weak echo signal.

Design/methodology/approach

Based on the analysis of CMUT array structure and work principle, the CMUT units are designed and the dynamic performance analysis of SIMULINK is given according to the demand of underwater detecting. A transceiver isolation circuit is used to make transmission mode and receiving mode separate. A detection circuit is designed based on the transimpedance amplifier to achieve extraction of high-frequency and weak signal.

Findings

Through experimentation, the effectiveness of the CMUT performance simulation and the transceiver integrated adjustment circuit were verified. In addition, the test showed that CMUT with 400 kHz frequency has wider bandwidth and better dynamic characteristics than other similar transducers.

Originality/value

This paper provides a theoretical basis and design reference for the development and application of CMUT technology.

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Article
Publication date: 27 July 2012

Robert Bogue

The purpose of this paper is to provide an insight into the techniques used for the non‐destructive testing (NDT) of non‐metallic structural materials, notably polymer and…

Abstract

Purpose

The purpose of this paper is to provide an insight into the techniques used for the non‐destructive testing (NDT) of non‐metallic structural materials, notably polymer and ceramic composites.

Design/methodology/approach

Following a short introduction, this paper first considers methods for testing carbon fibre‐ and glass fibre‐reinforced polymer composites. It then discusses the role of NDT in wind and wave power systems and some of the techniques used to test ceramics and ceramic composites. Brief conclusions are drawn.

Findings

This shows that the growing use of non‐metallic engineering materials in critical applications has highlighted the need for a range of advanced NDT methods. While some traditional techniques can be adapted to test these materials, in several instances novel methods are required. These include a range of thermal, ultrasonic, electromagnetic, radiographic and laser‐based technologies.

Originality/value

The paper provides a review of the techniques used and being developed for the non‐destructive testing of non‐metallic engineering materials.

Details

Assembly Automation, vol. 32 no. 3
Type: Research Article
ISSN: 0144-5154

Keywords

Content available
Article
Publication date: 1 December 2001

Abstract

Details

Assembly Automation, vol. 21 no. 4
Type: Research Article
ISSN: 0144-5154

Keywords

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Article
Publication date: 1 December 2000

Weihua Shi and Trevor Little

Investigates the potential for building smart seams by incorporating optic fibers ultrasonically. The heating and bonding mechanisms of ultrasonic welding process in…

Abstract

Investigates the potential for building smart seams by incorporating optic fibers ultrasonically. The heating and bonding mechanisms of ultrasonic welding process in fabrics were studied. Battle dress uniform (BDU) (50/50 nylon/cotton), 100 percent cotton, 100 percent polyester and Nomex fabrics were used and were bonded ultrasonically with and without polyurethane adhesives. The effects of three important welding parameters, namely weld pressure, weld time and amplitude of vibration, on the joint strength and the temperature profile at the interface were examined. The temperature profiles for different fabrics were measured during ultrasonic welding process. The attenuation degree of signal transition properties of optic fibers incorporated was tested to determine if ultrasonic process provided a possible way of embedding optic fibers into seams and achieving sufficient joint strength while the signal transmission properties of optic fibers incorporated were not changed significantly.

Details

International Journal of Clothing Science and Technology, vol. 12 no. 5
Type: Research Article
ISSN: 0955-6222

Keywords

Content available
Article
Publication date: 1 April 2003

Abstract

Details

Pigment & Resin Technology, vol. 32 no. 2
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 30 January 2007

Satu Salo and Gun Wirtanen

The purpose of these studies was to investigate the cleaning and hygiene of plastic cheese moulds and plastic transportation crates and to assess the suitability of…

Abstract

Purpose

The purpose of these studies was to investigate the cleaning and hygiene of plastic cheese moulds and plastic transportation crates and to assess the suitability of ultrasonication for cleaning these dairy devices on a pilot scale and to optimise these cleaning procedures.

Design/methodology/approach

The contamination load in the various process lines was monitored by use of chemical methods, i.e. EDTA titration and COD measurement for organic residues and various microbiological techniques for microbial contaminants. Ultrasonication cleaning procedures for cheese moulds were planned among parameters applicable to the process environment. The Taguchi method design of experiments was also used for the cleaning of milk transportation crates.

Findings

Ultrasonication was found to be a suitable cleaning method for both cheese moulds and transportation crates. Acceptable cleaning results were achieved using short cleaning procedures with a temperature under 60°C. Various types of cleaning agents can be used together with ultrasonication and the plastic materials in the utensils tolerated ultrasonication. The quality and the efficacy of the cleaning liquid used in the ultrasonic bath in the dairy plant were rapidly diluted due to the accumulation of organic soil. To ensure the effectiveness of cleaning, the quality of cleaning liquid should be measured frequently and threshold limits for changing the cleaning liquid should be set. The COD measurement proved to be practical for monitoring the organic load of the cleaning liquid and traditional culturing, as well as commercial culturing applications, e.g. Petrifilm™ AC and DryCult® TPC can easily be used for monitoring the level of microbial contamination.

Research limitations/implications

No major limitations, apart from the required investments, were found for applying the ultrasonication in the cleaning of dairy devices, e.g. plastic cheese moulds and plastic milk transportation crates.

Originality/value

The work is of value in highlighting the potential use for ultrasonication in improving the cleaning procedure of returnable milk transportation crates made of plastic.

Details

British Food Journal, vol. 109 no. 1
Type: Research Article
ISSN: 0007-070X

Keywords

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