• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.641-642
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.10a
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• pp.275-276
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• 2006

• Composites Research
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• v.12 no.5
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• pp.23-30
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• 1999

Fiber reinforced composite materials are widely used in automotive industry to produce parts that are large, thin, lightweight, strong and stiff. It is very important to know a charge shape in order to have good products in the compression molding. In particular, the product such as a bumper beam is composed of the random and unidirectional fiber mats. The characteristics of flow fronts such as a bulging phenomenon for random mat and unidirectional fiber mat and slip parameters are studied numerically. And the effects of viscosity ratio and stack type on mold filling parameters are also discussed.

• Journal of Korea Technology Innovation Society
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• v.5 no.3
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• pp.382-395
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• 2002

Metal Injection Molding(MIM) is a technology without any mechanical processing, which is a promising area backed up by nano powder technology developed in late 1990's. The market was about 24 billion U$ in 1999. Many applications are made in process development, uses, powder making, hindering and sintering, of which order is in terms of the number of patents. This technologies are mainly developed by US firms, and applied by Japanese firms. Europe and Korea are still catch-up stage. More efforts should be made in this field because new opportunities are opening, thanks to nano technology.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2004.11a
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• pp.217-220
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• 2004

3D CAE becomes a key technology to complete a digital engineering system. '3D TIMON', developed by TORAY Industries, Inc., is the useful software to analyze whole injection molding process with solid elements and is capable of generating solid mesh models directly from 3D CAD data. In this paper, we introduce '3D TIMON' and the application examples in the each industries.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2011.06a
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• pp.1183-1184
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• 2011

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.919-920
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• 2010

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2005.10a
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• pp.23-27
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• 2005

Generally, when the injection molds are made in advanced nations, the improvement of a quality and production rate is obtained by using CAE. In this paper, the methodology which is possible to reduce the cycle time of injection molding process is studies by using the cooling analysis with CAE(Moldmax). In case of changing the cooling system design with the analysis result of CAE, the manimum reduction of the cycle time runs into 30 percent. Finally, the average reduction of the cycle time is 17.8 percent.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2007.10a
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• pp.289-292
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• 2007

To prevent the damage of glass lens molds and deterioration of glass lenses using in progressive GMP process, a thermal stress and a deformation of the glass lens molds at forming temperature should be considered in the design step. In this study, as a fundamental study to develop a multi cavity mold used in an aspheric glass lens molding, a heat transfer and a thermal stress analysis were carried out for the case of one cavity glass lens mold used in progressive GMP process. Finally, using analysis results, we estimated the thermal stress in a glass lens mold and predicted a modified height of guide ring that determines the forming height of a glass lens.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2005.09a
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• pp.141-146
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• 2005

In the present study, the characteristic of warpage and flow balance for family mould, which is able to mold parts with different shapes in a mold, is considered. To obtain an optimal gate and runner system, plastic injection molding analysis with commercial code is performed. Design and manufacturing of family mould is then carried out on the basis of this computer aided engineering result. Flow balance and warpage comparisons between experiment and numerical analysis give good agreement with each other. However, it was shown that results of warpage measured by CMM was about $20\~55\%$ lower than those of numerical analysis.