摘要:
Silica- or alumina-containing granules are loaded into a mold of which the inner walls at least are formed of a nonbonding material constituted of ferrochromite, magnesiochromite, calciochromite, or trivalent-chromium oxide. The mass is then heated to a temperature above the softening point of the granules so as to fuse them together and thereafter the heated mass is hardened. As the mass can inherently not bond to the lining of the mold subsequent separation is relatively easy.
摘要:
A brick press is disclosed having a turntable carrying a plurality of molds angularly spaced from each other and having equipment associated therewith establishing a plurality of series of operating stations, each series including at least a precompression station, a compression station and an ejection station. The molds carried by the turntable are provided with replaceable liners. A material handling and feed system is also disclosed, providing for preparation of particulate or granular materials to be charged into the molds.
摘要:
A mold assembly having a mold cavity formed by liner plates, at least one being moveable, an actuator having an actuator axis, and a force multiplier formed by first and second drive elements, the first drive element positioned off-axis from the actuator axis and in mechanical communication with the moveable liner plate, the second drive element operatively coupled to the first drive element, and the actuator configured to provide a first force having a first magnitude in a first direction along the actuator axis to the second drive element which moves the first drive element and the moveable liner plate in an extending direction, wherein a magnitude of a force applied to the moveable liner plate resulting from compression of dry cast concrete in the mold cavity that is required to move the moveable liner plate in a direction opposite the extending direction is greater than the first magnitude.
摘要:
A method for making a smooth ceramic including loading ceramic powder to be densified into a hot press die, placing one or more spacers with a polished surface between a hot press punch and the ceramic powder, placing the die and punch into a hot press and hot pressing the ceramic powder, and removing a smooth ceramic shape that requires no subsequent polishing or processing and has a surface roughness of 5 nm RMS or better. The smooth ceramic shape may be transparent, and it may be spinel, magnesia, yttria, lutetia, scandia, YAG, any composites thereof, or any of their rare earth doped compounds. Also disclosed is the related smooth ceramic made by this process.
摘要:
A mold for making dry cast concrete blocks includes a pair of vertical shoulder forming sections, one along each of the opposite sides of the mold to form vertical front shoulders of a block. Each shoulder forming section has a shoulder roughening arrangement to result in molded, roughened shoulders of the block. Methods of making such blocks and the resulting block are included.
摘要:
A mold assembly for molding concrete blocks including at least one mold cavity including a plurality of liner plates forming sides walls of the mold cavity, wherein at least one of the liner plates is moveable between an extended position and a retracted position relative to an interior of the mold cavity. The mold assembly further includes a linear actuator having an actuator axis, a first drive linkage coupled to the linear actuator, and a second drive linkage coupled to the first drive linkage and positioned off-axis of the actuator axis and in mechanical communication with the at least one moveable liner plate, wherein the linear actuator provides forces in opposite directions along the actuator axis to the first drive linkage to drive the second drive linkage toward and away from the interior of the mold cavity to direct movement of the at least one moveable liner plate between the extended and retracted positions.
摘要:
A masonry block molded by a masonry block machine employing a mold assembly having a plurality of liner plates, at least one of which is moveable. The masonry block includes a first transverse face, a second transverse face opposing the first transverse face, at least one aperture extending through the masonry block between the first and second transverse faces, a first end face joining the first and second transverse faces, a second end face opposite the first end face and joining the first and second transverse faces, a first major face joining the first end and second end faces, and a second major face opposing the first major face and joining the first and second end faces. A molded utility opening extends through the first major face to the at least one aperture and adapted to receive a utility device, wherein the first major face and molded utility opening are formed during a molding process by action of a moveable liner plate having a mold element which is a negative of the molded utility opening.
摘要:
A casted concrete stone having opposed parallel surfaces formed in a mold and wherein the opposed parallel surfaces have a molded textured surface. The concrete stone is fabricated by a dry-cast concrete mold wherein a profiling plate is provided with mold bottom wall formations each having a textured outer surface. A bond release film or spray or permanent coating is provided on the textured outer surface of the mold bottom wall formations. Mold forming side walls are disposed about the mold bottom wall formations. After the mold is filled with a dry-cast concrete mixture a top plate, having mold top wall formations, is disposed over the mold forming side walls with the mold top wall formations disposed inside respective ones of the molds to close the molds. Pressure and vibration is applied to compact the dry-cast concrete whereby to form a dry-cast concrete stone with opposed molded textured surfaces.