Abstract: When pressing kneaded sand in a kneading sand tank into a mold by a pressing member, a pressing force applied to a kneaded sand layer in the kneading sand tank is monitored and a moving position of the pressing member is monitored from when the pressing member starts to move. A pressing start time at which the kneaded sand starts to flow into the mold is identified based on the pressing force applied to the kneaded sand layer in the kneading sand tank, and a pressing starting position of the pressing member at the pressing start time is identified. As a result, the pressing start time and the pressing starting position of the pressing member when the kneaded sand starts to flow into the mold are accurately identified, so the reliability of a filling evaluation of the kneaded sand into the mold is improved.

Abstract: The present invention provides a flaskless molding machine that can use a matching plate of different thicknesses. The flaskless molding machine has two molding flasks that have a matching plate sandwiched between them, the two molding flasks being positioned in a way such that one of opening ends of the molding flasks is opposed to each other and each of the other opening ends of the molding flasks is engaged with a squeezing board, and a pair of spaces is formed, into which spaces molding sand is filled by air through each of the openings for introducing the molding sand, disposed on a wall of each of the two molding flasks that are opposed to each other, the flaskless molding machine thus constituted being able to mold two molds by squeezing the molding sand with the squeezing boards.

Abstract: The present invention provides a flaskless molding machine that can use a matching plate of different thicknesses. The flaskless molding machine has two molding flasks that have a matching plate sandwiched between them, the two molding flasks being positioned in a way such that one of opening ends of the molding flasks is opposed to each other and each of the other opening ends of the molding flasks is engaged with a squeezing board, and a pair of spaces is formed, into which spaces molding sand is filled by air through each of the openings for introducing the molding sand, disposed on a wall of each of the two molding flasks that are opposed to each other, the flaskless molding machine thus constituted being able to mold two molds by squeezing the molding sand with the squeezing boards.

Abstract: A molding machine that defines upper and lower mold cavities while cope and drag flasks, having a match plate sandwiched therebetween, are rotated from a horizontal position to a vertical position. An upper squeeze member is insertable into the cope flask. A pressure-applying plane of the upper squeeze member defines an upper mold cavity together with the match plate and the cope flask. A pivoting frame supports the cope and drag flasks, having a match plate sandwiched therebetween, and the upper squeeze member, such that they rotate in unison between a horizontal position to a vertical position. A fixed filling frame abuts the drag flask when the cope and drag flasks are in the vertical position. A lower squeeze member has a pressure-applying plane that is oriented horizontally. The pressure-applying plane of the lower squeeze member defines a lower mold cavity together with the match plate, the drag flask, and the filling frame.

Abstract: Equipment and a method, therefore, for molding a mold with a molding flask, having a device for introducing molding sand that introduces molding sand into a molding flask and a filling frame, using compressed air, the molding flask and the filling frame being mounted on a model plate in a superimposed state; a shielding device having a plurality of feet that can enter the filling frame and can be temporarily held at positions that are spaced apart at predetermined distances from a model part of the model plate, which model part faces the plurality of feet. The equipment further includes a squeezing device provided adjacent to the device for introducing molding sand, which squeezing device squeezes the molding sand in the molding flask and the filling frame, and a transfer device for carrying the model plate, the molding flask and the filling frame into and out of both the device for introducing molding sand and the squeezing device.

Abstract: This invention provides a method for changing a match plate in a molding apparatus for a flaskless upper mold and a lower mold, which method allows easy change of the match plate. This invention is comprised of a first step for moving a existing match plate placed in the apparatus to between a cope flask and a drag flask of one set of flasks in the perpendicular position, and for holding a new match plate between a cope flask and a drag flask of another set of flasks in the horizontal position, a second step for rotating the cope flask and the drag flask holding said existing match plate from the perpendicular position to the horizontal position, and for rotating the other cope flask and the drag flask holding the new match plate from the horizontal position to the perpendicular position, and a third step for moving the new match plate from the perpendicular position to the apparatus, and for moving the existing match plate from the horizontal position to the outside of the apparatus.

Abstract: The disclosed invention provides a molding machine that defines upper and lower molding spaces while cope and drag flasks 12,13 and a match plate 11 clamped therebetween are rotated from a horizontal position to a vertical position, and that readily places a core into a lower mold within the drag flask. An upper squeeze member 14 is insertable into the cope flask 12 with its pressure-applying plane being opposed to the upper face of the match plate 11. The pressure-applying plane defines an upper molding space together with the upper face of the match plate 11 and the cope flask 12. A pivoting frame 23 supports the cope and drag flasks 12,13, a match plate 11 clamped therebetween, and the upper squeeze member 14, such that they rotate in unison between a horizontal position, in which the pressure-applying plane of the upper squeeze member 14 is oriented vertically downward, to a vertical position in which the pressure-applying plane is oriented horizontally.

Abstract: A method and apparatus for molding molds having no flask wherein a match plate is put between an upper and a lower flask having intakes for foundry sand. An upper and a lower molding space are defined by inserting an upper and a lower squeeze device into openings of a pair of the upper and the lower flask having no match plate, and a pair of the upper and the lower flask and the match plate are rotated and moved so that they become perpendicular, and are moved so that the intakes of the flasks move upward. The upper and the lower molding space are filled with the foundry sand. The foundry sand in the molding spaces is squeezed by the squeeze devices. A pair of the flasks and the match plate are rotated so that they become horizontal. Then the match plate is removed. While the preceding processes are being carried out, if necessary a core can be installed between the molds, the flasks are matched to each other, and the molds are removed from the pair of flasks.

Abstract: A method and apparatus for molding molds having no flask wherein a match plate having a pattern is put between a pair of an upper and a lower flask having intakes for foundry sand. An upper and a lower molding space are defined by inserting an upper and a lower squeeze device into openings of the pair of the upper and the lower flask having no match plate, and the pair of the upper and the lower flask and the match plate are rotated and moved so that they become perpendicular and then the intakes of the flasks move upward. The upper and the lower molding space are then filled with the foundry sand. The foundry sand in the molding space is squeezed by the squeezing device. The pair of the flasks and the match plate are rotated so that they become horizontal. Then the match plate is removed, the flasks are matched to each other, and the molds are removed from the pair of flasks.

Abstract: A shell molding apparatus includes a lower die and an upper die. The lower die includes a plurality of shell molding inserts, each having the shape of a halved cylinder, spiny insert receiving recesses which are formed in undercut portions formed by curved surfaces of adjacent shell molding inserts, and spiny inserts retractably provided in the spiny insert receiving recesses, each spiny insert having a curved surface of the same curvature as the curved surface of the shell molding insert and provided with many protrusions on the curved surface. The upper die has a plurality of continuously formed recesses corresponding to the plurality of shell molding inserts of the lower die.

Abstract: The molding apparatus includes a table movable between an area where molding sand is fed and a mold-producing area for carrying a pattern plate on which a flask is mounted, a cylinder for vertically moving the table, a closing cover having an opening at the lower part thereof, the opening communicating with an upper opening of the flask. The closing cover has a stepped part such that the cross-sectional area of the lower part of the closing cover is smaller than that of the upper part thereof. At least one air-supply pipe communicates with the upper part of the closing cover and an air valve communicates with the air-supply pipe to introduce ambient air into the air-supply pipe. An opening is formed in an upper and side part of the closing cover for communicating with a vacuum source. A press plate is suspended in the closing cover for a vertical movement such that the press plate can be airtightly inserted into the small lower part of the closing cover.

Abstract: Upper and lower boxes are conveyed in a foundry moulding installation with two parallel conveyors, in each case one moulding machine for the upper and lower boxes on one of the conveyors and transfer stations between the two conveyors. On the first transfer station, the empty upper box is removed from the empty lower box, transferred to the second conveyor and is supplied to the first moulding machine, while the empty lower box is moved on up to the second transfer station positioned between the moulding machines and transferred to an empty location on the second conveyor positioned immediately upstream of the first moulded upper box the upper box in the next working cycle is transferred into the transfer station and from there to the first conveyor, while the lower box is moved on into the second moulding machine and then into a core inserting line.

Abstract: An automatic molding apparatus includes a rotatable turntable which has located thereon a plurality of pattern supporting plates. A mold pattern located on at least one of the pattern supporting plates is surrounded by a flask located on the pattern supporting plate and having an open top and bottom. A movable sand adding box communicates with the top of the flask when the flask and the pattern supporting plate are moved to a feeding position beneath the sand adding box. The sand adding box has an open top and bottom to allow sand to pass therethrough and into the flask. A feeding channel beneath a sand supply includes an upper opening for allowing sand from the sand supply to enter the feeding channel. A movable plate allows sand in the feeding channel to enter the sand adding box when the movable plate is moved to an open position. After being filled with sand, the flask and sand adding box are raised to a position where a pressing plate compresses the sand in the flask.

Abstract: Foundry equipment (1) has a plurality of moulding tables (2) arranged radially on a carousel (3). A central work station (5) is provided for a machine operator (6) having access to control means (17, 10-12) to rotate the carousel (3), and hence the tables (2), in a selective manner beneath a discharge head (13) of a resin and sand mixing machine (14).

Abstract: To permit greater through-put of a mold box filling and compacting system, mold boxes are moved vertically by a lifting table which passes through the station transport turret (10) to place a pattern or mold carrier plate (11, 12) in the mold box, and, upon continued vertical movement, placing a filling frame (14) about the mold box, and, upon further vertical movement, placing the thus formed subassembly in engagement with a sand filling apparatus (15). Upon subsequent lowering, the subassembly is returned to the turret, the turret rotates and places the subassembly in position for alignment with a compacting station, raises the subassembly to the compacting station for compaction of the sand about the model or pattern.

Abstract: Green sand molds for use in casting operations are made automatically by a matchplate molding system. Features of the system include (1) pneumatic apparatus for filling the cope and drag flasks with sand, (2) a pusher on the drag flask for shifting molds of various shapes to a transfer conveyor, (3) a carriage supporting the drag flask for vertical and lateral movement (4) a lower sand magazine which moves laterally to open and close a sand chute gate while also being movable vertically relative to the gate, (5) a squeeze head movable between various positions enabling control over the volume of sand delivered to the cope and drag flasks, (6) a vibrator for directly vibrating the matchplates, (7) liners for releasably holding molds in the flasks, (8) an accumulating conveyor for transferring the newly formed molds and (9) a pusher for shoving the molds off of the accumulating conveyor.

Abstract: Apertures are formed in the top surface of the platen assembly. A resilient diaphragm extends across each aperture and is extended upwardly through the aperture by a plunger. The extended diaphragm protrudes into sand within the flask and locks the sand mold against movement parallel to the top of the platen assembly.

Abstract: A mold pattern is held in position in a mold flask in an unconnected relation to the mold flask. Sand is supplied to the mold flask to surround the mold pattern while the mold flask is vibrated to compact the sand around the mold pattern.

Abstract: An apparatus for compacting granular molding material, particularly foundry molding material, includes a filling unit, a compression unit and a molding unit. A sealing surface on the molding unit is engaged by depending sealing strips on the compression unit to provide a tight seal. The opposed sealing strips extending parallel to molding unit movement have force-transmitting sealing elements, while the other pair of opposed sealing strips extending perpendicular to the molding unit movement repel molding material from the sealing surface.

Abstract: A foundry molding installation for producing boxless (or flaskless) sand molds comprises a molding machine having a pattern plate (or match plate) for simultaneous molding of upper and lower bodies (or mold halves) and a shifting device for transporting a molded lower body to a transfer station and simultaneously returning to the molding station, for assembly with the upper body therein, a lower body which has been provided with cores. The cores are inserted at core insertion stations along the sides of a rectangular, closed circulation, roller track which is mainly disposed outside the molding machine. At the molding-machine end the track comprises a tandem shifting apparatus having a transfer station in common with that of the shifting device of the molding machine and being movable back and forth, over the shifting device, so as to return a cored lower body from one side of the track to the transfer station while feeding a fresh lower body to the other side of the track.

Abstract: A molding machine for producingcasting molds has several angularly spaced molding stations and includes a main column and at least one swivel column positioned within and rotatable relative to the main column. Swivel bearings connect swivel arms to the main and swivel columns so that the arms extend transversely of and can be moved between the molding stations. Box frames for forming mold parts are secured to the free ends of the swivel arms so that they can be inverted or turned over. The swivel arms can be moved one above the other with the box frames holding mold halves which can be combined to form a complete mold.

Abstract: An apparatus is provided comprising two independent driving units: a main squeeze cylinder moving flask-and-pattern accessories to a squeeze board and an auxiliary actuating cylinder transferring the pattern along the line of molding. The auxiliary actuating cylinder is built into a pedestal mounted on the main squeeze cylinder piston rod and connected with the pattern by quick-release sectional lock-type clamping means of the hook-slot type enabling a shuttle mechanism carrying the flask-and-pattern accessories to be transferred from station to station. The pedestal is mounted at the compacting station so that is is capable of functioning as a sand jolting mechanism.

Abstract: In the production of a foundry mold utilizing mold forming apparatus which includes a pattern device, a molding box arranged on the pattern device and a frame attached to the molding box, a surplus amount of molding sand is initially filled in over the pattern device in excess of the amount required for the production of the mold and during the production operation the excess sand is stripped off by profiled stripping means which are moved relative to the molding box to strip the excess sand along a profile which is dependent upon the configuration of the pattern device. In one aspect of the invention a single profiled stripper may be used and in another aspect a plurality of strippers having differring profiles may be employed. In other aspects of the invention different mechanisms are applied to move the stripping means relative to the molding sand by movement of the pattern device either along a linear path or through a circular path.

Abstract: Apparatus for the production of foundry molds within a mold forming assembly which at least includes a pattern device and a molding box capable of having molding material contained therein is adapted to effect simultaneous free-fall jolting and squeezing of the molds during their production within a molding machine having a press and a jolter table with at least a pair of columns rigidly connecting said press with said jolter table to form a gantry. Conveyor means are provided for reversibly moving the mold forming assembly from a position at which the molding box is put onto the pattern device and filled with molding material to another position within the gantry where the simultaneous free-fall jolting and squeezing is effected. Coupling means are provided for coupling and uncoupling the pattern device with the conveyor means to effect movement of the mold forming assembly to both of the aforementioned operating positions.

Abstract: The upper part of a casting mold is produced in apparatus which includes a mold table and a mold presser plate between which the casting mold is compressed. A pattern plate is positioned on the mold table and a feed hopper introduces mold forming material into a mold box arranged on the mold table. The feed hopper includes a premolding member which has a location and dimensions generally corresponding with a sink pattern member located on the presser plate in order to form a depression for a sink in the upper part of the mold. A sprue is formed by means extending between the pattern plate and the sink pattern member which includes a compressible spring which is compressed by the sink pattern member when the mold is compressed between the presser plate and the mold table.