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SLS 공정을 이용한 산업용 임의형상제작 시스템에 관한 연구
김동수(D. S. Kim),임현의(H. E. Lim),김성종(S. J. Kim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
A real object duplication system (RODS), including three dimensional (3D) scanner and solid freeform fabrication system (SFFS), is a device to make three-dimensional objects directly from the drawing or photo data. A Selective Multi-Laser Sintering (SMLS) process designed in this paper is by which computer images received using 3D scanner are built up from polymer powder on building room of large size using dual laser at industrial type SFF system. Using the process can rapidly produce real object duplication components of industrial type such as cylinder, engine block, chassis of automobile, etc. In this paper, the industrial type SFF system using SMLS process is manufactured and the system is satisfied with high precision and high speed processing technique. To research characteristics of each part for theindustrial type SFF system, a structure and thermal analysis and test of each part is carried out. Also, to achievement of high performance for industrial type SFF system, design and fabrication for the structure, heater, nitrogen supply, laser and control part are carried out.
김동수(D. S. Kim),이원희(W. H. Lee),임현의(H. E. Lim),박용두(Y. D. Park),이규백(K. B. Lee) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
In this study, we used th ESD method to prepare th protein microarrays for observation the stem cell responses to pattern size space and shapes. The ESD method allows a reduction in spot size, high efficiency of substance transfer, and high rate in fabrication as a result of ability to simultaneously deposit thousands of identical spots. Typical electrospraying conditions for the deposition of proteins were a voltage of 3~5 keV and the humidity under 30%. The patterns of masks have a variety of shapes, spaces, and hole sizes from 10 um to 300㎛. Three kinds of proteins(collagen, fibronectin, and vitronectin dissolved in PBS) are deposited in a dry state, preserving the functional activity of proteins. Stem cells were cultured on each protein patterned sample at 37℃ for 1 day.