Method for filling a foam mixture in a cavity of a metal mold and an apparatus for molding a mold

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.