Abstract: A molding machine for making bricks, etc. having a mold open on both ends and opposed plungers for cooperation with the mold, the mold and plungers being removable and replaceable as a set.

Abstract: A brick forming machine comprising an upper vacuum room mounted on a frame lifting up and down and enclosing an upper piston therein, an upper sealing ring mounted on the frame for sealing contact to an upper face of a mold, a lower vacuum room mounted on a truck and encircling a lower piston and giving airtight contact to a lower face of the mold, a lower sealing ring mounted detachably on an upper face of a lower half of a main body, spaces between the upper vacuum room and the upper sealing ring and also between the lower vacuum room and the lower sealing ring being respectively connected to upper and lower skirts in airtightening condition, and vacuum pressing forming operation is performed by extracting air in the spaces through an extracting pipe.