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 vacuum press is provided with a die and top and bottom plungers which are disposed along the same vertical central axis as the die. Spaces which extend from the die and surround the top and bottom plungers are enclosed by chambers formed of sealing cylinders, flexible bowl-like skirts and sealing flanges. A horizontal table is provdided on the die to support a mix-filling charger and a compact-discharging pickup device. A wiper is carried by the pickup device to clean the table when the pickup device is shifted away from the vertical central axis of the press. Controls are provided to automate the filling of the die, press-forming and discharging of the resultant compact.

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.