Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Reexamination Certificate
2011-03-15
2011-03-15
Del Sole, Joseph S (Department: 1743)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
C425S00400R
Reexamination Certificate
active
07906049
ABSTRACT:
A method for filling a foam mixture in a cavity of a metal mold, which can provide a mold without defects. This method for filling a foam mixture in a cavity of a horizontally-split metal mold by pressurizing a mixture of granular aggregate, water-soluble binders, and water, and injecting the mixture into the cavity of the metal mold includes: a step for preparing the horizontally-split metal mold having a filling port communicating with the cavity, which port is disposed at a side and near abutting surfaces of the horizontally-split metal mold; a step for connecting a discharging port of a device for injecting the foam mixture to the filling port of the horizontally-split metal mold, wherein the device for injecting the foam mixture includes a mixing bath to accommodate and mix the granular aggregate, the water-soluble binders, and the water, and a mechanism for pushing up the mixture in the mixing bath, wherein the mixing bath is cylindrical and has an opening at its upper end, a bottom plate at its lower end, and the discharging port at its side; a step for pushing up the foam mixture in the mixing bath by driving the mechanism for pushing up the mixture; a step for discharging the foam mixture from the discharging port, and for injecting the mixture into the filling port; and a step for filling the cavity with the foam mixture while the mixture pushes out air in the cavity.
REFERENCES:
patent: 3810728 (1974-05-01), Jacobs
patent: 2003/0026866 (2003-02-01), Boyd
patent: 2006/0071364 (2006-04-01), Zenpo et al.
patent: 1 561 527 (2005-08-01), None
patent: 1 749 598 (2007-02-01), None
patent: WO 2004/041460 (2004-05-01), None
patent: WO 2005/089984 (2005-09-01), None
Asano Norihiro
Kanno Toshio
Kato Yusuke
Nishikawa Kazuyuki
Sonoyama Shinji
Brown, II David N
Del Sole Joseph S
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Sintokogio Ltd.
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