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김홍석 대구대학교 산업기술연구소 2004 産業技術硏究 Vol.16 No.1
Gas assisted injection molding (GAIM) is an innovative low-pressure injection molding technique that can provide numerous benefits such as reduced part warpage, excellent surface quality without sink marks, low injection pressure, and greater design flexibility. However, the adoption of GAIM may cause unexpected defects since it requires many subtle design factors such as resin shot size, delay time and gas injection pressure, which wouldn't be considered in conventional injection moldings. Therefore, experiences applying GAIM should be collected and examined in order to establish design rules of the new technique. The purpose of this paper is to summarize developing processes of four automotive interior parts such as instrument panel and center facia, etc. so that possibilities and limitations of GAIM were examined. As a result, it was found that gas channels should be designed properly according to characteristics of parts in order to obtain advantages of GAIM.
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동측 신무형성증과 동반된 거대 정낭 낭종의 복강경하 절제술
김홍석,천성엽,차재성,김형진,김영곤,정영범 대한비뇨의학회 2004 Investigative and Clinical Urology Vol.45 No.7
Seminal vesicle cysts associated with ipsilateral renal agenesis are very rare, with most being congenital, and two-thirds associated with renal dysplasia or agenesis and ectopic ureter opening into the seminal vesicle. When they are symptomatic, surgical excision has been the treatment of choice. Herein, a case of a symptomatic giant seminal vesicle cyst associated with ipsilateral renal agenesis is reported, which was treated by laparoscopic excision. (Korean J Urol 2004;45:735-738)
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