• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09a
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• pp.499-500
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• 2006

With the capability of net shaping for complex 3D geometry, powder injection molding (PIM) is widely used for automotive parts, electronics and medical industry. In this study, an ultrasonic dental scaler tip produced by machining process was redesigned for the PIM process. An injection mold was designed and machined to produce the dental scaler tip by the PIM process.

• Design & Manufacturing
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• v.14 no.4
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• pp.52-57
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• 2020

In this study attempted to prevent defects due to blow holes among defects of sand casting products. It was intended to reduce the defect rate by reducing the blow hole of the inner surface. Currently, expectations and requirements for the quality level of non-ferrous aluminum casting in the casting industry are increasing. In addition, the shape is complex and the shrinkage precision is required. Among them, the test prototype is expensive to manufacture the mold, and the production time is also long, and the product is manufactured by sand casting. At this time, the highest defect rates are defects caused by shrinkage defects, surface defects, and blow holes.. At this study, the manufacturing time was shortened by using the shape of the fluid movement path in advance. Also, it is possible to reduce defects due to blow holes.

• Fashion & Textile Research Journal
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• v.17 no.6
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• pp.988-995
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• 2015

Gaps between the upper edges of brassiere mold cups and the breasts are one of the most serious issues in realizing comfort wearing of commercial brassieres for small-breasted women. The surplus ease amounts causing the fit problem were measured from 3D wearing images of the small-breasted women's brassieres. The effect after the removing the surplus ease amounts from the upper edge of mold cup was approved by subjective wearing evaluation. Since the volume distribution of mold cup can also affect the wearing sensation of brassiere, the subjective wearing sensation was compared for two brassieres of different volume distributions, V_L, of which volume was concentrated at the lower cup, and V_C, which has the thickest part at the nipple. As the results, the suitable sensation for cup volume and the natural wearing silhouette could be accomplished by removing the surplus ease amounts from the upper edge of mold cup to reduce the gaps between brassieres and the breasts, which could be accomplished through an approach reducing the volume near the upper edge of mold brassiere cup and making the volume concentrated at the lower cup. These works provide a useful information on the design of the brassiere mold cups for small-breasted women. Moreover, modeling methods of 3D scan data and 3D printing technique for making more accurate mold cases used in this research can be helpful to develop and evaluate clothing products in future.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.39 no.2 s.120
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• pp.68-77
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• 2007

It is necessary to recognize philosophical and scientific depth, contained in traditional culture in a correct fashion, in order to succeed and develop our excellent traditional culture. Some studies on storage, circulation, and package design of traditional food will multiple the added value of traditional culture. So this research was carried out for making packing cases of kinds of Korean dried confectionery using Hanji by traditional manufacturing method, Hanji textile, charcoal Hanji and jade Hanji, and for developing environmental-friendly Korean dried confectionery package as more luxurious packaging papers by putting an exterior design on the surface. The results measured physical properties, air permeability and anti-mold activity of Hanji, and designing Korean dried confectionery are as follows. The physical properties and air permeability used to manufacture Korean dried confectionery package, turned out to be no affection to the food packaging Hanji. In order to avoid the monotonousness of Korean dried confectionery package, it was designed with Hanji textile together with elegant traditional pattern. It is estimated to increase the value of Korean dried food and to make the anti-mold activity of Hanji added charcoal and jade effective. In conclusion, by developing individual properties of traditional food and proper packaging paper as well as packaging design according to circulating situation, it is considered that the taste and the fancy can be maximized. After all, by applying excellent traits contained in our race's culture, it is possible to develop the package cases into competitive ones. And it would be able to increase utilization of Hanji. Namely, production of high quality traditional food package with Hanji is expected for new valuable industry of Hanji.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.38 no.2 s.115
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• pp.52-60
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• 2006

Environment-friendly shock-absorbing materials were made of wastepaper such as Korean old corrugated containers(KOCC) and Korean old newsprint (KONP) with a vacuum forming method. The plate-like cushioning materials made of KOCC and KONP respectively by vacuum forming showed superior shock-absorbing properties with lower elastic moduli compared to expanded polystyrene (EPS) and pulp mold. Even though the plate-like materials had many free voids in their fiber structure, their apparent densities (${\approx}0.1g/cm^3$) were a little higher than that of EPS (${\approx}0.03g/cm^3$) and much lower than that of pulp mold(${\approx}0.3g/cm^3$). However, the elastic moduli of the cushioning materials made of wastepaper were much lower than that of EPS or pulp mold. This finding implies that the cushioning materials made of KOCC fibers containing more lignin than KONP show better shock-absorbing properties than KONP. Moreover, the cushioning materials made of KOCC and KONP respectively showed greater porosity than pulp mold. The addition of cationic starch to the cushioning materials contributed to the increase in the elastic modulus to the same level as that of EPS. Furthermore, the deterioration in fiber quality by repeated use of wastepaper played a positive role in improving shock-absorbing ability.

• Design & Manufacturing
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• v.13 no.4
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• pp.45-50
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• 2019

The fourth industrial revolution calls for an integrated talent by improving working-level skills within the big framework of creativity and convergence. Therefore, university education focuses on solving the problem of practical ability education by improving employment ability. Based on this improvement in practical skills, this study is based on the field-based design curriculum of Capstone. Currently, the Capstone Design Course is being implemented at most universities, extending its scope to the fields of engineering, humanities, social studies and arts. However, there is a limit to the core concept of Capstone design education and capacity education developed in line with the foreign educational environment and applied directly to our nation's university education. In terms of overseas cases, the core focus is to develop practical, design, and prototype capabilities by forming a team among all grades and multidisciplinary institutions to support the capital and manpower of the industry. However, the nation's industrial linkage and curriculum have difficulties in carrying out multi-disciplinary education. In this study, students were asked to team up and solve the challenges that the industry needs based on the expertise acquired in the lower grade curriculum by applying majors and 3D printing through the first and second semester courses of the fourth grade to address these limitations. In addition, business skills for the process of creativity and leadership experience in our country through a suitable design capstone class to review the efficiency of education by applying a model. In order to achieve the purpose of Capstone design subject, the goal setting, class model composition, class model application, verification and evaluation, and final class model development procedures were carried out. Through this process, it will be used as a basic material for educating design class capstone design.

• Corrugated packaging logistics
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• v.2 no.6
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• pp.85-87
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• 1995

• The monthly packaging world
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• s.259
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• pp.81-85
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• 2014

• Corrugated packaging logistics
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• v.2 no.5
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• pp.43-59
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• 1995

• The Journal of Society for e-Business Studies
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• v.12 no.1
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• pp.1-24
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• 2007

In the mold parts industry, customers typically place orders for order-made parts with some changes to the design specifications of ready-made parts within the extent of the manufacturing capability of the supplier. Being customized for ready-made parts, existing e-Catalog systems cannot support the above trade pattern. To solve this problem, an ETO (engineering-to-order) method is proposed here, enabling the trade of order-made parts in an e-Catalog system by utilizing the design and manufacturing knowledge of the part suppliers. After addressing technological challenges and solutions, we briefly describe application of the ETO method to two types of mold parts - ejector pins and mold bases.