Abstract: Moulding machine (1) for the moulding of sand moulds (4, 5) by blowing sand in through slitshaped openings (14, 15) extending across each side plate (16, 17) of a moulding box (6, 7). Into the boxes (6, 7) extend moulding patterns (12, 13). At least one of the end parts (18, 19) of the slitshaped openings has a greater width than the central part (20, 21) thereof. When the sand is blown in through the openings (14, 15) a greater amount of sand is achieved at the peripheral region of the boxes (6, 7) than when the end parts has no greater width than the central part of the opening. Consequently, by the present solution is achieved a greater hardness of the squeezed sand moulds at the peripheral region than by the prior art solutions.

Abstract: A full mold casting process in which a complete, positive model made of a thermally decomposable material is placed in a molding box and filled with sand; the sand is hardened by shaking. Casting metal is poured on the thermally decomposable model and the model is decomposed by the casting heat. In order to fill up the cavities of the model and mold moldings with crucial cavities, reliably with the molding sand, the model is provided with pass-through apertures. By introducing the flow-through holes into the casting model, preferably through the flange and button sides, all cavities of the casting model are completely filled with sand and the latter is compressed against the model. The rising of the sand in the model cavity is facilitated by the fact that the filling level of the molding sand is kept nearly constant near the model cavity to be filled until the cavity is completely filled.

Abstract: A riser sleeve apparatus (10) for preparing and insulating a passage (14) within which molten metal is accumulated prior to its movement into a mold cavity which includes an inner surface (12) which longitudinally extends between a first end (16) and a second end (18) wherein the inner surface bounds the passage. The riser sleeve further includes an annular lip (20) which is positioned adjacent the second end and extends inward into the passage. When the riser sleeve is positioned about a plug of a pattern, the annular lip deforms to seal the passage at the second end. A process for forming a cast metal article using said riser sleeve apparatus. A process for forming the riser sleeve apparatus.

Abstract: A riser sleeve apparatus (10) for preparing and insulating a passage (14) within which molten metal is accumulated prior to its movement into a mold cavity which includes an inner surface (12) which longitudinally extends between a first end (16) and a second end (18) wherein the inner surface bounds the passage. The riser sleeve further includes an annular lip (20) which is positioned adjacent the second end and extends inward into the passage. When the riser sleeve is positioned about a plug of a pattern, the annular lip deforms to seal the passage at the second end. A process for forming a cast metal article using said riser sleeve apparatus. A process for forming the riser sleeve apparatus.

Abstract: A riser sleeve apparatus (10) for preparing and insulating a passage (14) within which molten metal is accumulated prior to its movement into a mold cavity which includes an inner surface (12) which longitudinally extends between a first end (16) and a second end (18) wherein the inner surface bounds the passage. The riser sleeve further includes an annular lip (20) which is positioned adjacent the second end and extends inward into the passage. When the riser sleeve is positioned about a plug of a pattern, the annular lip deforms to seal the passage at the second end.

Abstract: The molding apparatus includes a pattern plate carrier for air-pressurized compaction processes. The carrier is equipped with air venting structure running along the inner contour of the mold box of the sand molding apparatus in the form of elongated slotted bars.

Abstract: The pattern plate of a matchplate molding machine is attached to a drag flask by spring-loaded clamps which may be rapidly opened to enable the plate to be quickly and easily removed from the flask and replaced by another plate. Locating members are attached to the flask in laterally opposed relation with the clamps and coact with the clamps to fixture the pattern plate accurately on the flask. A removable operating handle is provided for opening the clamps and carries a latch for releasably holding the clamps in their open positions during changing of the pattern plates. A conventional bolt-on pattern plate may be converted for use with the clamping system by attaching bars with downwardly inclined upper surfaces to the pattern plate, the bars being secured within notches in the side edges of the plate.

Abstract: A pattern plate for making moulds intended for use in the production by sand casting of window seals or similar articles having an undercut bead, includes a plate, a fixed exterior part, an axially movable interior part and a elastomeric ring connecting the interior and exterior part. The interior part moves axially over a short path defined within the exterior part by mechanical stops between an extended position, to which it is pushed back by springs, and a retracted position which it assumes through the action of the compaction pressure. During compaction, an annular elastomer ring located between the interior and exterior parts compresses to compact the mold material in a lateral direction. Upon release, the elastomeric ring returns to its original position facilitating the removal of the mould.

Abstract: A first insert is arranged to be engaged with one surface of a matchboard in alignment with a bore in the matchboard. A second insert has a portion thereof arranged to be engaged with the opposite surface of the matchboard at the bore. The first and second inserts have impression forming portions arranged to make recess and projecting contours respectively in impression material with a close tolerance interfitting engagement when in facing relation to provide anti-shifting connection to opposed portions of the impression material. The inserts have a telescoping engagement which precisely aligns the first and second inserts in their impression forming functions, and such telescoping arrangement provides adjustable mounting of the inserts on matchboards of different thicknesses.

Abstract: Inserts with projections and recesses are provided for securement to mold components and also are arranged to make respective recesses and projections in impression material such as sand. These recesses and projections in the impression material are dimensioned and shaped to have a reverse interfitting engagement to accomplish anti-shift functions and are dimensioned and arranged to form spaces between facing impression portions for receiving loose impression material. This arrangement also forms an improved method of mounting anti-shift inserts.

Abstract: A method and an apparatus for replacing pattern plates in a moulding plant for making boxless mould parts of sand or other like material is characterized by the use of a revolving table (1), which is provided with e.g. four symmetrically placed arms (1), in which are suspended pattern plates (2,3). The revolving table is designed for sequential conveying of the pattern plates (2,3) for placing these on a squeeze plate (PP) and a counter-pressure plate (MTP), respectively, in the moulding chamber of a moulding plant (suggested only on the drawing). The pattern plates (2,3) are placed in the respective arms (1) when the latter are just opposite the changing position. From the changing position, the pattern plates (2,3) are conveyed into a moulding chamber by a transverse sliding movement in an essentially known manner.

Abstract: A manoeuvering system for a foundry plant for the automatic manoeuvering of heavy implements includes two carrier pins located on the same side of each implement. A carriage is movably mounted to a frame and a gripper including two jaws as attached to the carriage. This gripper is rotatably mounted to the carriage so that the implement can be rotated as well as moved longitudinally.

Abstract: The drag pattern and the cope pattern for a standard AAR coupler yoke are each mounted on a pattern plate to form an oblique angle of about 1.degree. between the mounting surface of the pattern plate and a plane parallel to a longitudinal center plane of the pattern. The patterns each include core print surfaces for establishing the position of one unitary core which is used in a sand mold to form surfaces in the coupler yoke at the front end portion thereof. The drag pattern includes pattern surfaces to mold sand to form the surfaces surrounding the draft gear pocket on the upper and lower straps and the rear draft gear seat at the rear end portion of the yoke. The draft gear seat is generally planar and perpendicular with each inside wall of top and bottom straps.

Abstract: Mold forming apparatus including a pattern device which is composed of pattern plates adapted to be operatively fitted into a pattern plate carrier is operated with the pattern device shifted between a lifting station, at which a formed mold may be removed from the patterns of the pattern plates, and an exchange station where the pattern plates may be separated from the pattern plate carrier for appropriate treatment thereof. The pattern plate carrier is formed in a generally box-like configuration with a bottom member having openings extending therethrough through which extraction pins of a lifting device may extend in order to raise and lower the pattern plates from the pattern plate carrier at the exchange station. A vacuum system is provided which will tend to hold the pattern plate carrier upon a bearing member of the apparatus and which will also tend to hold the pattern plate upon the pattern plate carrier while the finished mold is removed therefrom.

Abstract: A flash control molding is provided for use in association with a pattern for forming a casting cavity in a metal casting mold. The flash control molding includes an elongated strip of pliable material having a predetermined cross sectional configuration to define a thick portion for forming a flash control chamber in the mold, and a thin edge along one side of the thick portion to form a restricted opening between the flash control chamber and the casting cavity so that a casting subsequently produced in the mold is formed with controlled shaped flash which has a built-in fracture line immediately adjacent the casting proper, thereby making the flash easily and cleanly removable from the casting.

Abstract: A pattern set-up especially useful for making prosthetic dental appliances is assembled by attaching a plurality of refractory casts to a support member so that adjacent casts along the length of the support member are circumferentially offset with respect to one another. The casts carry expendable patterns that are connected to the support member by gating systems laid down on faces of the casts. The support member has outward protrusions supporting the weight of the casts and may be formed by a plurality of segments fitted together in end-to-end relation.