Investigations of the structure and process parameters of sewing operation

This paper presents a summary of the developments in process control in textile processes at the University of Minho, by a multidisciplinary research group involving three different departments (Textile, Electronic and Mechanical Engineering). The studies target the automatic process parameter monitoring and control in the areas of industrial sewing and knitting.

2008 IEEE International Conference on Industrial Technology, 2008

The industrial manufacturing of sewn products has always been one of the critical processes of the textile chain concerning quality assurance. Assuring the appropriate setup and operation of all the machines, and thus the final seam quality, is a very complex task. Traditionally, this task is accomplished by empirical methods, with machine setting and quality control relying on the skills of operators and technicians. In this work, an approach to a more knowledge-based and integrated process planning and control is presented. A system was developed to measure and analyze the most important mechanical effects occurring during high-speed sewing. A general overview over this development is given in this paper.

2020

Quality control is a set of steps or guidelines designed to guarantee that a product or service meets certain performance standards. Quality control in textiles is concerned with being certain a product meets performance standards and customer expectations. In this paper one model of woman shirt is observed. For this model a working plan was made and the time that is required to perform the operations of sewing the model was also defi ned. The total time for each operation, the daily production capacity, the daily capacity per worker and the tact of the group were also calculated. The percentage of load per operation was also defi ned. The observation in the term of choosing the right operation for the operators was also done..

The sewing machine created in the XIX century has roughly remained unchanged in its basic technologies. Although a great range of mechanical and electronic technologies has boosted its development enormously, the process of sewing itself, however, although perfected in many aspects, has remained uncontrolled.Many of the phenomena occurring at high-speed sewing (up to 10000 stitches per minute) are still not properly understood.

International Journal of Polymer and Textile Engineering (SSRG-IJPTE), 2020

Sewing is the stage in apparel manufacturing process sequence where large number of work force is employed compared to other stages of manufacturing processes. The quality of garments made in sewing depends upon various factors such as skill of sewing machine operator, machine settings, fabric and thread quality etc. Since many factors involved in determining the quality of product, possibility for occurrences of defects is also very high. In order to achieve maximum productivity and efficiency in sewing room, it is important to control and minimize the defects in sewing process. In this project an attempt is made to study the various defects occurs in sewing room for 10 different garment styles. The data collected has been analysed and suitable remedial measures have been supported. The study reveals but there is scope for improvement of productivity by effective management and quality of production.

Study of operations in sewing process of girls’ pants, 2022

The sewing labour that has a portion of up to 70% of the labour cost in the clothing production, creates a very effective cost component. That is why it is necessary to analyse the workflow in the sewing room better and use the optimum performance and productivity of the workers. In this research rationalizations of girls’ pants production are studied and the developed method is implemented in a middle-sized company in Aegean Region of Turkey. As a result, the productivity of balancing was increased by 6.53 % (from 93.07% to 99.6%). Due to done method development studies, the Total Sewing Time/Piece was been reduced to 20.92 minutes from 21.22 minutes. Before method development studies the theoretical number of workers need was 37 and the actual employed number of workers was 38 at the end of method development studies (MDS) and line balancing this number was been decreased to 35 workers. This girls’ pants order was planned for 12 days of production, thus, in total 576 $ saving was provided by the utilization of the rationalized method. The benefits attained through the method development in the company base will globally contribute to the garment industry in the world in terms of the competitive power and the rise in the employment of the labour. Keywords: work-study, balancing of sewing line, clothing production, rationalization, need of workers

Industria Textila, 2019

The execution of the products with special destination requires solving two problems: assuring a high degree of protection of the consumer, acquired by structural and technological design, according with the product destination and increasing the operator’s responsibility for the quantitative and qualitative result of the work, by implementing rigorous work methods for the sewing operations. The final result will be economical efficiency of the companies. Paper’s aim is to analyze different solutions for the sewing operations for military equipment (for example, products designed to carry grenades or radio stations). The case study was made in a clothing company, with the particularity that, for increasing work responsibility, one operator is responsible for all the operations for a product. The work method used in the paper implied data analyze and synthesis, the results were obtained using the Time Measurement Method. Implementing the optimum work method at the production system l...

International Research Journal of Modernization in Engineering Technology and Science, 2024

Automated machinery design for garment manufacturing is essential for improving productivity, consistency, and quality. This paper focuses on the development of new pulling gear for automated pant bottom hem sewing machines. Traditionally, these machines require manual intervention to guide the bottom hem sewing process, which often leads to inconsistent stitch quality and alignment. While twin-needle sewing machines can create twin lines for the bottom hem, they typically lack sufficient pulling force to adequately handle the fabric of the pants' bottom hem. The innovative design of the pulling gear aims to address this issue by providing the necessary pulling force for the bottom hem of eyelet pants. The research and design discussed in this article seek to solve technical challenges, eliminate the need for skilled manual operators, and enhance overall productivity. This improvement ensures smooth and precise feeding of fabric pieces in the automated twin needle sewing machine, ultimately improving the consistency and quality of the stitching. By integrating this innovation, garment manufacturers can boost productivity, reduce reliance on manual skillful labour, and optimize the output of the production process, thereby reaping the benefits of automation in the garment manufacturing industry.

For some years now the fabrics feeding system of an industrial overlock sewing machine has been studied at the University of Minho, gathering different background researchers at the Laboratory of Process Research. Following the findings reported in previous stages, briefly summarised in this paper, a new research programme was established to enable a PC-based open and closed-loop control of the presser foot system. This paper highlights all this recent developments, presenting and discussing, in detail, the PID closed-loop control strategy implemented. The results show that the presser foot closed-loop control has improved performance for a wide speed variation range.

Mechatronics, 1999

This paper describes the initial study of the research program being carried out on the feeding system of an industrial overlock sewing machine. The results obtained from the displacement and compression force, together with the graphic kinematic analysis, which includes the ...

Modapalavra e-periódico

The production of clothing has several operational steps, such as industrial sewing, which is used on textile surfaces as a materialization resource, that is, the union of two or more layers of fabrics by sewing points that makes the object tridimensional. In this context, the research seeks to explore the possibilities of industrial sewing to be considered as a creative resource to generate innovative surfaces in clothing, anchored on three pillars: in the design approaches of Surface Design, in the technical aspects of industrial sewing and in characteristics of materials textiles. For this, an exploratory investigation was carried out, with application of experiments using four straight industrial sewing techniques in three grammages of fabrics. The results were categorized through the effects obtained on the surfaces as graphic, structural and graphic structural function, demonstrating to be a creative resource that can be explored at the beginning of the design of clothing prod...

Industria Textila, 2021

The textile industry is a very labour intensive industry which mainly comprises of small and medium enterprises (SMEs).In developing countries, usually occupational health and safety programs are focused on large-scale organisations. Across-sectional study on evaluating ergonomics risk factors associated with task performing strategies has been carriedout at cutting and sewing units of a garment industry organisation. A reliable direct observational ergonomics riskassessment method Rapid Entire Body Assessment (REBA) was used to find out the risk associated with workingpostures adopted by the workers. Data was collected through physical observations, walkthrough, interviews, and videorecordings. Data analysis was carried out on 180 selected postures by using REBA method. It concluded that overallworking strategies were poorly designed as more than 30% of postures highlighted a high level of risk of MSDs thatnecessitates immediate investigation for improvement. Major causes of risk w...

2004

Production monitoring is an important task for proper production planning. For this task the information that a system of this nature can possibly gather assumes significant importance. Among all the information available during production, the detection of faults assumes a crucial role since it directly affects the quality and productivity. This paper presents a system which was developed with the purpose of performing the analysis in real time of the knitting process, supplying the parameters of major concern for production and furthermore, allowing the detection, identification and location of faults.

• Abstract • Reference • Abstract This paper represents the use of some tools and techniques for improving apparel sewing section efficiency throughout the production process. Now a day's apparel manufacturing industries are trying to develop their current production system and situation and continuously looking for new production tools and techniques in order to keep swiftness with the rapid changes of trend in consumers of apparel products. To deal with the recent problems & challenges industries have to improve production efficiency & productivity; reduce lead time, ensuring proper quality requirements. There is no doubt that sewing section in an apparel industry is the most momentous and teeming department that plays a vital role in the whole firm. To improve the existing situation of this section and increasing productivity time study is a very effective technique. In time study, Standard Minute Value (SMV) has been calculated for each operation or job. Based on this technique each operators capacity is measured and balanced to eliminate the bottlenecks. Here, by applying these techniques significant improvements in the sewing section have been achieved such as SMV, man power, bottle neck, capacity achievable, production/hr, performance rating, balance % and line efficiency. The findings can be extended to similar apparel industries in future. General overviews to these works are presented in this paper.

Applications of Automation, Automatic Control, and Robotics in The Textile Industry , 2024

The application of automation and robotics in the textile industries found a rapid increase in the last decades due to the increase in the demand for garment, technical and medical textiles. In this lecture notes, I tried to highlight the state of the art in the subject. This lecture notice paves a path to further learning in this important engineering subject. The course on Automation, Robotics, and automatic control is dealing with the following subjects. Subject 1: Need for Automation in the Textile industry Subject 2: Principles theory of automatic control Subject 3: Applications of automatic control in different textile sectors (spinning, weaving, finishing, and garment). Subject 4: Flexible Automation The Potential for Automation steps towards automation, and the main objectives of computer-integrated manufacturing. Subject 5: Examples of automation in the spinning industry, Applications of automation in weaving, Garment industry, and finishing processes Subject 6: Robotic Arm; Construction of robotic arm. Degrees of freedom. Types of robotic arms, Examples. Types of the sensors.