• Title, Summary, Keyword: Shoe Mold

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A Study on the Development of Shoe Outsole Mold for Flash-less (플래시 발생 억제형 신발 밑창 금형 개발에 관한 연구)

  • Hur Kwan Do;Yeo Hong Tae;Choi Young
    • Journal of the Korean Society for Precision Engineering
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    • v.22 no.1
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    • pp.103-108
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    • 2005
  • In this study, to develop a flash-less mold for forming of shoe-outsole, experiments and forming analysis were carried out. In order to reduce the extra-materials, offset method and mass distribution method are used in the preform design. The vertical mold structure pressing the preform was introduced to produce a flash-less shoe-sole. To measure the contact status of parting surface of mold, the pressure film has been used. The guide-gutter system and the continuous pressing mold have been developed for the discharge of extra-materials and re-pressing. By the investigation, flash of shoe-outsole was considerably reduced.

The Shoe Mold Design for Korea Standard Using Artificial Neural Network (신경망을 이용한 한국형 표준 신발금형설계)

  • Choi, J.I.;Lee, J.M.;Baek, S.H.;Kim, B.M.;Kim, D.H.
    • Transactions of Materials Processing
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    • v.24 no.3
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    • pp.167-175
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    • 2015
  • In the current study, the design methodology has been developed to produce shoe mold for a suitable walking shoes of the general Korean using ANN (Artificial Neural Network). To design the suitable and comfortable shoes for the Korean, the shapes of foots were measured for 513 people. In this research, the foot length, breadth and ankle were considered as design parameters. In order to find the optimal foot shape for the average value of design parameters, the average value of design parameters and the other measurements were used as input and output to the ANN. After training, the various foot measurements were predicted by ANN. Base on the ANN results, the walking shoes were manufactured by considering these measurements and designing a shoe mold. From the results, the proposed method could give a more systematic and feasible means for manufacturing walking shoes with greater usefulness and better generality.

A Study on the Development of Shoe Midsole Mold for Flash-less (플래시 발생 억제형 신발 중창 금형 개발에 관한 연구)

  • Hur Kwan Do;Yeo Hong Tae;Choi Young
    • Journal of the Korean Society for Precision Engineering
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    • v.22 no.1
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    • pp.109-114
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    • 2005
  • In this study, to develop a flash-less mold for forming of shoe-midsole, experiments and forming analysis were carried out. In order to reduce the extra-materials, the final preform has been modified by the experiment of pressure forming at the room temperature. To measure the contact status of parting surface of mold, the pressure film has been used. The midsole mold of the wedge structure type has been developed for the improvement of the contact status. The vertical pressing mold structure was introduced for the production of a flash-less midsole. By the investigation, flash of shoe-midsole was considerably reduced.

Development of Rapid Tooling Technology for Shoe Mold and Its Applications (신발 금형의 쾌속제작기술 개발 및 그 적용에 관한 연구)

  • Chung, Sung-Il;Im, Yong-Gwan;Jeong, Hae-Do;Jeong, Du-Su;Bae, Tae-Yong;Lee, Seok-Woo;Choi, Han-Zong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.27 no.8
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    • pp.1371-1379
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    • 2003
  • RP&M (Rapid Prototyping and Manufacturing) is the most appropriate technology for the small-lot production system, because the production cycle is getting shorter owing to various needs of the consumer. In this paper, rapid tooling technology is applied to the casting process. The casting process has the ability to reflect complicated shapes in one process. But it has not been widely used to make a die and mold because of the poor surface quality caused by air bubbles on the surface of the casting product. In this study, the porous casting mold is fabricated from a mixture of plaster and water-soluble binder. The porous casting mold can improve the characteristics of casting products with the help of the vacuum sealed casting process. The vacuum sealed casting process is an advanced technology that removes the air bubbles between the porous casting mould and the liquid metal, thus making the surface of the casting product finer. The purpose of this paper is to develop a high quality shoe mold using porous casting mold and to apply the RP&M technology to the shoe industry.

Rapid Tooling of Porous Ceramic Mold Using Slip Casting (슬립 캐스팅을 이용한 통기성 세라믹형의 쾌속 제작)

  • Chung, Sung-Il;Jeong, Du-Su;Im, Yong-Gwan;Jeong, Hae-Do;Cho, Kyu-Kap
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.5
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    • pp.98-103
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    • 1999
  • The application field of porous mold is more and more expended. A mixture of alumina and cast iron is used for making porous mold using slip and vacuum casting method in this study. Slip casting is a process that slurry is poured into silicon rubber mold, dried in vacuum oven, debinded and sintered in furnace, In this procedure, slurry is composed of powder, binder, dispersion agent, and water. Vacuum casting is a technique for removing air bubbles existed in the slurry under vacuum condition. Since ceramics has a tendency of over-shrinkage after sintering, cast iron is used to compensate dimensional change. The results shows that sintering temperature has a great effect on characteristics of alumina-cast iron composite sintered parts. Finally ceramic-metal composite sintered mold can be used for aluminum alloy casting of shoe mold using this process.

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A Study on Verification of Shoe Last Grading System Based on Foot Measuring Data (발계측 자료에 기초한 신골 할출 시스템의 검증에 관한 연구)

  • Park, Hae-Soo
    • Journal of the Ergonomics Society of Korea
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    • v.26 no.1
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    • pp.71-77
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    • 2007
  • Shoe's size and shape are determined by the last that takes shape of foot because last is the mold of shoe in development and manufacturing process. Then adaptation between foot and shoe is dependent on the last. In mass shoe production, model size is developed in the first place, other sized lasts are made through the grading process based on model size. The most important factor in grading system is grading deviation that must be same amount induced from foot measuring database. At present, most of the last manufacturing companies in korea using 260mm as a standard foot model size. When length grading deviation is 5mm, the ball girth grading deviation is 3.7mm and the ball width grading deviation is 1.2mm. I verified existing grading system by comparing grading results with foot measuring data. Also, I proposed reasonable grading deviation and application method of grading system. From the analysis of foot measuring database, reasonable grading deviations are 1.22mm in ball width and 0.84mm in ankle height in case of length grading deviation is 5mm. I confirmed that the current grading system is very accurate. When we grade last from 230mm to 290mm by current grading system based on model size 260mm, there is grading error over 1mm in the front outside area of foot. This error level of 1mm is no problem in normal walking shoe's last, but it induces adaptation problems in sports and special purposed shoe's last. Therefore using of three standard model size is recommended in grading men's last for reducing grading deviation error under the level of 1mm. It is specifically described as 235mm in 225-245mm, 260mm in 250-270mm, 285mm in 275-295mm. According to the above recommended grading system, it is enough to measure only three foot sizes in case of foot measuring project for men's last development.

A study on the development of gas measurement system in shoes mold and automatic gas-vent exchange machine with computer vision (신발금형의 가스 배출량 측정 장치와 영상정보를 이용한 가스벤트 자동 교환 시스템의 개발)

  • Kwon, Jang-Woo;Hong, Jun-Eui;Yoon, Dong-Eop;Choi, Heung-Ho;Kil, Gyung-Suk
    • Journal of Sensor Science and Technology
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    • v.15 no.1
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    • pp.20-27
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    • 2006
  • This paper presents a gas measurement system for deciding hole positions on a PU middle-sole mold from computed gas amount. The optimal number of holes and their positions on the shoe mold are decided from statistical experiment results to overcome the problem of excessive expenses in gas vent exchange. This paper also describes a gas vent exchange mechanism using computer vision system. The gas hole detecting process is based on computer vision algorithms represented as a simple Pattern Matching. The experimental result showed us that the system was useful to calculate the number of holes and their positions on the shoes mold.

Development of DB Construction and CAM System for Remove of Rapid Feed at Milling (밀링가공에서 급속이송 제거를 위한 DB구축 및 CAM 시스템 개발)

  • 손영지
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • pp.106-111
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    • 1998
  • NC code has to be made after changing the drawing information to DXF file, the converting file. Arranging the information ordered irregularly when DXF file is made decrease the unnecessary time of rapid feed during working and the DATA capacity when the information is changed. This CAM program can be used easely for the beginner of the minor enterprises. The connection of operations and the use of GUI increase business efficiency.

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A Study of Development of Program for CAM and DB Construction of the Processing Information using DCL (DCL을 이용한 가공정보의 DB구축 및 CAM용 프로그램 개발에 관한 연구)

  • Son, Young-Ji;Kim, Soon-Kyung;Jeon, Eon-Chan
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.9
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    • pp.143-148
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    • 1999
  • G code has to be made after changing the drawing information to DXF file, the converting file. When the information is changed, the converted file had the unnecessary time of rapid feed during working and the large DATA capacity. It need for arranging the information ordered irregularly. This CAM program based AutoCAD can be decreased uncomfortableness in contrast to use of each system. Also it can be increased productivity by arranging information. And it can be used easily for the beginner of the minor enterprises. its program can be decreased system error between others by using one system and increased work efficiency by using DCL.

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