TY - GEN
T1 - Microcellular injection molding of gas-laden pellets using nitrogen (N 2) and carbon dioxide (CO2) as co-blowing agents
AU - Sun, Xiaofei
AU - Turng, Lih Sheng
AU - Gorton, Patrick J.
AU - Nigam, Pankaj
AU - Buell, Sezen
PY - 2013
Y1 - 2013
N2 - A novel combination approach to producing quality foamed injection molded parts has been investigated. By combining extruded, gas-laden pellets with microcellular injection molding, the processing benefits and material characteristics of using both N2 and CO2 blowing agents can be realized, thus yielding features superior to that of using either N 2 or CO2 alone. Using an optimal content ratio for the blowing agents, as well as the proper sequence of introducing the gases, foamed parts with a much better morphology can be produced. In particular, extruding N2 gas-laden pellets, followed by microcellular injection molding with higher amounts of CO2, produces a cellular structure that is very fine and dense. In this paper, the theoretical background is discussed and experimental results show that this combined approach leads to significant improvements in foam cell morphology for low density polyethylene (LDPE), polypropylene (PP), and high impact polystyrene (HIPS) using two different mold geometries.
AB - A novel combination approach to producing quality foamed injection molded parts has been investigated. By combining extruded, gas-laden pellets with microcellular injection molding, the processing benefits and material characteristics of using both N2 and CO2 blowing agents can be realized, thus yielding features superior to that of using either N 2 or CO2 alone. Using an optimal content ratio for the blowing agents, as well as the proper sequence of introducing the gases, foamed parts with a much better morphology can be produced. In particular, extruding N2 gas-laden pellets, followed by microcellular injection molding with higher amounts of CO2, produces a cellular structure that is very fine and dense. In this paper, the theoretical background is discussed and experimental results show that this combined approach leads to significant improvements in foam cell morphology for low density polyethylene (LDPE), polypropylene (PP), and high impact polystyrene (HIPS) using two different mold geometries.
KW - Co-blowing agents
KW - Gas-laden pellets
KW - Microcellular injection molding
UR - http://www.scopus.com/inward/record.url?scp=84890282917&partnerID=8YFLogxK
U2 - 10.1115/MSEC2013-1158
DO - 10.1115/MSEC2013-1158
M3 - 会议稿件
AN - SCOPUS:84890282917
SN - 9780791855454
T3 - ASME 2013 International Manufacturing Science and Engineering Conference Collocated with the 41st North American Manufacturing Research Conference, MSEC 2013
BT - ASME 2013 International Manufacturing Science and Engineering Conference Collocated with the 41st North American Manufacturing Research Conference, MSEC 2013
T2 - ASME 2013 International Manufacturing Science and Engineering Conference Collocated with the 41st North American Manufacturing Research Conference, MSEC 2013
Y2 - 10 June 2013 through 14 June 2013
ER -