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정밀금형 알루미늄 합금주조공정시 주물 / 금형 접촉면에서의 Inverse 열전달해석에 관한 연구
문수동,강신일 ( Su Dong Moon,Shin Ill Kang ) 한국주조공학회 1998 한국주조공학회지 Vol.18 No.3
N/A Precision metal mold casting process is a casting method manufacturing mechanical elements with high precision, having heavy/light alloys as casting materials and using permanent mold. To improve dimensional accuracy and the final mechanical properties of the castings, the solidification speed and the cooling rate of the casting should be controlled with the optimum mold cooling system, and moreover, to obtain more accurate control of the whole process interfacial heat transfer characteristic at the mold/casting interface must be studied in advance. In the present study, aluminum alloy casting system with metal mold equipped with electrical heating elements and water cooling system was designed and the temperature histories at points inside the metal mold were measured during the casting process. The heat transfer phenomena at the mold/casting interface was characterized by the heat flux between solidifying casting metal and metal mold, and the heat flux history was obtained using inverse heat conduction method. The effect of mold cooling condition upon the heat flux profile was examined, and the analysis shows that the heat flux value has its maximum at the beginning of the process. (Received January 16, 1998)
CAD/CAM/CAE를 이용한 타이밍벨트커버 다재 사출성형에 관한 연구
조용회(Yong-Hoe Cho),문수동(Su-Dong Moon),송재준(Shinill Kang),강신일(Jae-Jun Song) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2
A methodology is presented to design and manufacture plastic automotive parts using the so called "multi-component injection molding process" which is a fairly new technique to produce plastic parts by injecting two or more materials sequentially using multiple injection units in a single machine into a single rotary mold. Attention is focused on the design of timing belt cover which is composed of PP (Polypropylene) substrate and TPE (Thermoplastic-elastomer) seal. To facilitate the design process for the assembled parts and the injection mold, injection molding simulation was performed to optimize the gate location of each cavity and balance the filling of the family mold in both the substrate and the seal. A proto tooling was produced based on the recommended design from the present research, and the timing belt cover was injection-molded. Precise guidelines to design the product and the mold for the multi-component injection molding process are presented.<br/>