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진동특성 및 물성을 고려한 치과용 스케일러 분말사출성형기술개발
고영배(Y.B. Ko),황철진(C.J. Hwang),김종선(J.S. Kim),정성택(S.T. Chung),권영삼(Y.S. Kwon),이정배(J.B. Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
Powder injection molding(PIM) is widely used for many parts in the field of automotives, electronics and medical industries, due to the capability of net shaping for complex 3-D geometry. Powder injection mold design for the dental scaler tip, a component of medical appliance, was presented. In comparison with conventional machining process, powder injection molding has many advantages, specially in price and dimensional stability, for molding dental scaler tip which has complex geometry. Both product design and mold design for dental scaler tip were presented. The rapid mold concept was applied to manufacture the various forms and materials of dental scaler tip including vibration characteristics.
고영배(Y.B. Ko),김종선(J.S. Kim),정성택(S.T. Chung),황철진(C.J. Hwang) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Powder Injection Molding(PIM) is a cost-effective technique for producing small, complex, precision parts in high volumes. 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. The mold design was aided by CAE analysis. A PIM feedstock was made of STS316L powder and a wax based binder. The filling balance in the mold was checked by a short shot test with LDPE and the PIM feedstock. Production capability of the PIM process for the dental scaler tip was examined with the mold. PIM process turned out to be an excellent substitute for machining process to manufacture the ultrasonic dental scaler tip.
분말사출성형을 이용한 치과용 스케일러 팁 금형 및 성형기술개발
고영배(Y. B. KO),김종선(J. S. Kim),정성택(S. T. Chung),황철진(C. J. Hwang) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
Due to 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 manufactured to produce the dental scaler tip by the PIM process.
고영배(Ko, Young-Bae),박형필(Park, Hyung-Pil),이정원(Lee, Jeong-Weon),차백순(Cha, Baeg-Soon) 한국산학기술학회 2014 한국산학기술학회논문지 Vol.15 No.4
본 액화 실리콘 고무는 내열성 및 내화학적 우수성으로 전자 제품 및 다양한 제품에서 활용되고 있다. 하지만 초탄성 재료는 일반 금속재료와 다른 특성을 보인다. 초탄성 재료는 하중과 변형이 비선형 관계를 보이는 대변형 범위에서도 탄성거 동을 나타내는 특성을 지니며, 비선형, 비압축성 및 대형의 특성을 지니고 있다. 이러한 특성 때문에 제품을 설계 및 생산 하기위해는 기능적 측면을 고려한 소재의 특성에 대한 물성 확보가 반드시 필요하기 때문에 현장에서 많은 어려움이 있다. 본 논문에서는 자동차용 방수커넥터 설계를 위해 소재의 인장, 압축 시험으로부터 구한 하중-변형관계를 이용하여 이를 유한 요소 해석에 적용한 결과를 비교하였으며, 해석결과와 제품의 성능 테스트 결과를 비교하여 방수커넥터용 씰의 경우 어떠한 소재특성을 적용할 경우 유용한 결과를 도출할 수 있는지를 확인하였으며, 이를 통해 제품 개발에 유용성을 확인하였다. Liquid silicone rubber(LSR) has been applied to various products such as electronic devices owing to its excellent thermal and chemical resistance. Hyperelastic materials, however, have properties distinguished from general metal materials. Hyperelastic materials show elastic behaviors in the range of large deformation in which load has the nonlinear relation with deformation. In addition, they have characteristics of nonlinearity, incompressibility, in large scale. On account of such characteristics, there are many difficulties in design and production using these materials. In this study, the load-deformation relation obtained from tension and compression tests was applied to finite element analysis in order to design waterproof connectors for automobiles. Furthermore, the effectiveness of the finite element analysis was confirmed by comparing the results of analysis with those of performance tests.