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Park, T.H.;Jeon, S.H.;Kim, H.M.;Baek, C.K.;Seo, K.J.;Lee, H.J.;Choi, W.C.;Choi, B.H.
- Proceedings of the Korean Society of Precision Engineering Conference
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- 2009.10a
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- pp.429-430
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- 2009
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Jeong Y.D.;Kang C.M.;Je D.K.
- Proceedings of the Korean Society of Precision Engineering Conference
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- 2005.06a
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- pp.706-709
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- 2005
Despite geometrical balanced runner system, filling imbalances between cavity to cavity have always been observed in multi-cavity injection mold. These filling imbalances are results from non-symmetrical shear rate distribution within melt as it flows through the runner system. It has been possible to decrease filling imbalance by optimizing processing conditions, but it has not completely eliminated this phenomenon during the injection molding processing. This paper presents a solution of these filling imbalances by using runner core pin which creates a symmetrical shear distribution within runner and the effects on filling imbalance when modifying a shape of runner core pin. As a result of using runner core pin, a remarkable improvement in reducing filling imbalance was confirmed. In addition we investigated how filling imbalances were affected by shape of runner core pin.
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Lee D.M.;Han B.K.;Lee O.S.;Lee Sung-Hee
- Proceedings of the Korean Society of Precision Engineering Conference
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- 2005.06a
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- pp.1416-1419
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- 2005
Design and manufacturing of plastic injection mold with cavity pressure/temperature sensors were performed in the present study for tensile test specimen. Standards of mold-base and tensile test specimen were used to design an injection molding system. Cavity pressure and temperature sensors were placed on the side of fixed platen of injection mold machine to prevent them from external impact damage. Injection molding experiments with variations of injection speed and melt temperature were performed and polycarbonate tensile specimens were prepared for the tensile test. It was shown that injection molding processing parameters can have effect on the mechanical properties of the plastic injection molded part.
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양학진;김성근;허영무;양진석
- Proceedings of the Korean Society of Precision Engineering Conference
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- 2002.05a
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- pp.569-574
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- 2002
As consumer's desire becomes various, agility of mold manufacturing is most important factor for competence of manufacturer. In common works to use commercial CAM system to generate tool path, some decision making process is required to produce optimal result of CAM systems, The paper proposes a methodology for computer-assisted tool selection procedures for various cutting type, such as rough, semi-rough and finish cuts. The system provides assist-tool-items for machining of design model part of injection meld die by analyzing sliced CAD model of die cavity and core. Also, the generating NC-code of the tool size is used to calculate machining time. The system is developed with commercial CAM using API. This module will be used for optimization of tool selection and planning process.
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김성근;양학진;허영무;양진석
- Journal of the Korean Society for Precision Engineering
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- v.20 no.1
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- pp.118-125
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- 2003
As consumer's desire becomes various, agility of mold manufacturing is the most important factor for competitive mold manufacturer. Decision making process is required to produce optimal result of CAM systems in using commercial CAM system to generate tool path. The paper proposes a methodology fur computer-assisted tool selection procedures for various cutting type of rough, semi-rough and finish cuts. The procedure provides assistance for machining tool selection by analyzing sliced CAD model section of die cavity and core. Information about machining time for the generated NC-code is used to aid the tool selection. The module is developed with commercial CAM API. This module will be used fur the optimization of tool selection and planning process.
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