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Experimental study on injection molding parts weight according to foam molding process
정현석,홍청민,이하성,김선용,Jung, Hyun-Suk,Hong, Cheong-Min,Lee, Ha-Seong,Kim, Sun-Yong Korean Society of Die Mold Engineering 2015 한국금형공학회지 Vol.9 No.3
Speaking in general terms the form injection process can be described as a new process-variant of already known structural foam molding technology which roots go back to the early sixties. The most limiting factors of already know foaming processes are large cell size and the lack of uniformity of these cells as well and the inability to foam all kinds of plastic materials. In this paper, Process Study on weight change in injection rate during foaming. Experimental conditions were set as the injection speed 50,150,300 and 450 mm/s. The experiments PA, PA+GF, PP, was confirmed that the weight increase to PP+TA.
The Separation Behaviors from Assemble Conditions for Pitch 1.25mm Level Wire to Board Connector
허영무,윤길상,Heo, Young-Moo,Yoon, Gil-Sang Korean Society of Die Mold Engineering 2016 한국금형공학회지 Vol.10 No.1
In this study, the modification structure design of insulation displacement connector developed was considered for simplification of assembly process. The modified connector consisted terminal, wafer and fitting nails. The separation behavior under locking condition for pitch 1.25mm wire to board connector was measured and the apparatus for the test was made. The maximum restraining force was measured about 4.5kgf that was bigger value than the specification limit. And the pulling force of a wire was also indicated about 2.3kgf.