• 대한산업공학회지
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• 제42권6호
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• pp.404-411
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• 2016

In footwear manufacturing systems, the upper parts of the shoes are manually sewed on a sub-line while bottom parts are produced by machines such as injection and molding machines on a sub-line before these two parts are combined into complete shoes on a final assembly line. The manual operations for the upper parts lead to a large variability in processing times, resulting in higher work-in-process inventory. In most footwear industries, production lines have been controlled by MRP-based push systems. Some industries attempt to introduce Kanban-based pull systems. This paper identifies the characteristics of the footwear manufacturing processes, and discusses the problems of the current control systems. As an operational alternative, a CONWIP-based control strategy is presented. Simulation experiments are performed to examine the performance of the control strategies.

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2002년도 춘계학술대회 논문집
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• pp.56-56
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• 2002

ERP 시스템 내에는 각 업종별로 특성에 맞는 업무 프로세스가 구현되어 있어야 함은 필수 불가결한 요소이다. 그러나, 범용 ERP 시스템은 거의 대부된 OEM 생산방식에 의존하고 있는 국내 중소 신발업체의 생산관리 방식과는 맞지 않는 부분이 너무 많다. 그러므로 신발제조회사의 현황에 맞는 ERP 시스템의 개발이 절실하다. 이를 위해서 첫째, 시스템 개발을 위한 신발생산용 업무 프로세스가 표준화되어야 하고 둘째, 프로그램 작성을 위한 표준업무 프로세스에 기초한 통합시스템 프로세스의 모형이 설계되어야 한다. 본 논문에서는 국내 신발제조업체들의 생산관리방식에 적합하고 신발생산 전용의 자원관리 시스템의 개발과 도입을 위한 기초로서 BPR의 수행과 표준 업무 프로세스를 구축하는 방법을 제안하였다. 그리고 이에 따른 신발생산 자원관리 시스템의 프로세스 모형을 제시하였다. 이 연구는 ERP 시스템 중 생산 자원계획을 위한 통합 프로세스 모형의 구축에 초점이 맞추어져 있으며 통합 프로세스 모형은 13개 모듈로 구성되었다.

• 한국염색가공학회지
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• 제32권3호
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• pp.167-175
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• 2020

In this study, the optimum conditions for manufacturing PVDF nano web according to various electrospinning conditions such as solution concentration and applied voltage conditions were confirmed. The optimum spinning conditions were studied by analyzing the changes in the radioactivity of PVDF/TiO₂ nano web according to the TiO₂ content and the content of β-phase closely related to the piezoelectric properties under established conditions. As a result, it was confirmed that the concentration of the spinning solution was 20 wt%, the applied voltage was 25 kV, and the TiO₂ content was 5 phr. PVDF nano web and PVDF/TiO₂ nano web were observed morphologies through Scanning Electron Microscope(SEM) analysis. Formation of β-phase by electrospinning was confirmed by Fourier transform infrared spectroscopy(FT-IR) and X-ray Diffractometer(XRD), and the effect of the trapped nano web structure on the piezoelectric properties was investigated.

• 한국응용과학기술학회지
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• 제24권4호
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• pp.347-353
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• 2007

Fleshing scrap is a kind of wastes produced during leather making process and used in the test of manufacturing biodiesel. The early step of manufacturing biodiesel is fat recovery from fleshing scrap. Hence, we investigated the influence of the way of fat recovery on the fatty acid composition. We used three different recovery ways, that is chemical method by protein decomposition with acid/fat recovering, physical method by protein denaturalization with heat and vacuum/fat pressing, and biodiesel method by protein decomposition/fat recovering. The biological method yielded the best results in terms of appearance transparency. It was most effective to lower acid value. Also the recovered fat by biological method would be favorable methyl-ester reaction raw material for biodiesel because it contains more than 5% of oleic acid among unsaturated fatty acid.

• Journal of information and communication convergence engineering
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• 제7권4호
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• pp.459-464
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• 2009

This paper presents a production information monitoring system as an infrastructure of CIM system in footwear industry. The system is composed of hardware devices of terminal, communication converter, line controller and software for manufacturing processes. A terminal like a scanner is used for shop floor data input and a line controller is used to link between terminal and server. LAN and RS485 are used for connecting hardware components and deliver their information mutually. In the system, real time production information is acquired from information resources such as group of uppers and soles. The collected production information is delivered to a line controller and analyzed. Server receives information from line controller and machines for production management. Production planning information that is machined in the server is delivered to the shop floor and used for the production management of work in process, and used for improvement of productivity in a footwear production company. The implementation of the developed system shows the effectiveness of the system.

• 한국의류산업학회지
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• 제22권2호
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• pp.202-208
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• 2020

This study is to help produce highly comfortable and wearable and footwear based on the establishment of basic data for manufacturing elderly footwear patterns and products. For this, a survey of 207 women in their 20s and 60-70s was conducted to identify the wearing of shoes, inconvenience areas, purchase practices and footwear preferences by age group. The results are as follows. First, the average age of the young female group was 22.5 years old, the elderly female group was 68.8 years old, and the average shoe size was 236.3 mm for the young female group and 238.3 mm for the elderly female group. Second, young women wore shoes for a longer time than elderly women, resulting in swollen and numb legs, hardened soles, uncomfortable toes and sore heels. However, elderly women felt more uncomfortable wearing footwear than young women. They suffered pain in the joint area, heal and toe areas as well as had more toe deformations due to aging. Third, all age groups preferred athletic shoes and loafers as well as purchases from footwear brand stores and department stores. The elderly spent more money on shoes, longer time to buy and valued the feeling of wearing, whereas the young considered design first. Fourth, both age groups prefer low-heels and natural leather, the young preferred to wear various types of shoes; however, the elderly are found to desire shoes that are comfortable and stable in both form and wearing.

• 한국산업보건학회지
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• 제11권3호
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• pp.219-228
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• 2001

Objective : For the purpose of preparing the fundamental data and health promotion and control program on organic solvents in air of manufacturing industry. Methods : The author surveyed number of organic solvent components which was used in working site and also determined the organic solvents concentration in air of 927 manufacturing industries and 1,267 working process with gas chromatography(NIOSH manual) for five years from 1995 to 1999. Results : Mean number of solvents components by type of industry, working process was number of 12. There were exceeded to TLV of 1,2-dichloroethane in textile manufacturing industry N,N-dimethyl furan in tanning and dressing of leather ; luggage, handbags, saddlery, harness and footwear manufacturing industry and chemical and chemical product manufacturing industry by type of industry. There were exceeded to TLV of 1,2-dichloroethane in handwriting and drawing process, cellosolve in adhesive spreading process, N,N-dimethly furan in production of solvent process and adhesion process by working process Total exceeded rate to threshold limit values of organic solvents mixture were 12.9% for EI(Exposure index) and 10.0% for Em(Estimation of mixture) by type of industry, 11.3% for EI and 8.2% for Em by type of working process. The highest exceed rate was 36.7% for EI in tanning and dressing of leather ; luggage handbags, saddlery, harness and footwear manufacturing industry and 29.0% for Em in textile manufacturing industry. The highest exceeded rate was 23.1% for EI and 12.5% for Em in adhesive spreading process by working process. Mean values of total subjects by type of industry and type of working process were $0.7{\pm}1.8$ for EI and $0.7{\pm}1.7$ for Em respectively. Conclusions : As above results, the author suggest that it makes the environmental control program on 1.2-dichloroethane, N,N-dimethyl furan, cellosolve by kind of organic solvent and on textile manufacturing industry, tanning and dressing of leather ; luggage, handbags, saddlery harness and footwear manufacturing industry by type of industry, and on handwriting, drawing process and adhesive spreading process and adhesion process by type of working process.

• 산업경영시스템학회지
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• 제23권57호
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• pp.93-102
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• 2000

The objective of this paper is to introduce to development of resource planning system of footwear manufacturing. The system development is to be done separately by module and each of which makes interface possible. And the final goal of the system development is to combine those modules to be ERP system covering all works from order to make, shipment, accounting. First, in this case study, introduce analysis of existing business flow and design of standard business process for development of systems. Second, describe in and out of the standard business process for shoes production and information management. Third, basic structure and design of the total system flow, configuration of completed 6 sub-systems of developing total 13 sub-system are presented. Fourth, function of software modules and principal algorithm and basic data structuring techniques o the 6 sub-systems are explained. Finally, hereafter implementation and development plans are presented.

• 한국지역지리학회지
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• 제7권2호
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• pp.55-70
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• 2001

본 연구는 부산 신발산업 노동과정의 공간적 특성을 분석한 것이다. 신발산업의 생산체계는 제품 및 디자인 개발, 부품 및 소재 개발 생산, 완제품 조립 마케팅으로 구성되며, 생산과정별 노동과정의 성격도 상이하다. 전문적인 다기능 인력에 의존하는 제품 및 디자인 개발, 핵심 부품 및 소재 개발 생산, 마케팅 등의 핵심 기능은 자사상표의 제품생산 기업에서만 수행되며, 주로 선진국과 국내의 서울과 부산지역에 입지 한다. 중요 부품 및 소재 개발 생산의 준핵심 기능은 고기능 고숙련의 노동력을 요구하며 전통적인 신발생산지역에서 주로 이루어지고 있다. 또한 숙련 미숙련의 여성노동력에 대한 의존도가 높은 완제품 조립생산과정은 핵심 기능 흑은 준핵심 기능과 함께 이루어지거나 의무화되기도 한다. 공간적으로는 국내의 전통적인 신발생산지역을 중심으로 이루어지고 있으나 최근 후발 개발도상국으로 확대되고 있다. 반면에 남성 노동력에 대한 의존도가 높은 부품 및 소재의 개발 생산의 경우, 핵심 부품 및 소재는 선진국에서, 중요 부픔 및 소재는 부산의 완제품 생산업체나 혁신적인 부품 및 소재 생산업체에서, 그리고 표준화된 부품 및 소재의 생산은 주로 후발 개발도상국에서 이루어지고 있다.

• 유기물자원화
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• 제15권4호
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• pp.100-106
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• 2007

피혁 제조 공정중 탈모 공정 이후 나피를 분할(Splitting)하여 얻어지는 피혁 가공 부산물(Limed pelt scrap)을 이용하여 탈회 및 탈지 과정의 전처리 공정을 거친 뒤 비크롬 탄닝과 열처리에 의한 방법과 glycidyl methacrylate (GMA)와 MMA와 같은 아크릴 모노머를 이용한 그라프트 공중합을 이용한 방법으로 우수한 내열성을 갖는 미세 콜라겐 분말을 제조하였다. 물성의 비교에서 본 연구의 방법으로 생산된 콜라겐 분말들이 열분해 온도, 열 저항성, 수분변화, 입도분포 등에서 더 나은 특성을 보였다.