Abstract: In a method of producing cores for foundry purposes, with the cores being composed of at least two core sections and being firmly joined with one another, the individual core sections are molded separately in a core mold composed of at least two mold sections. At the end of a molding process for the individual mold sections, their core mold is opened in such a manner that the core section remains connected with a mold section. Then the individual core sections to be joined, together with their mold sections, are moved into an assembly position and are joined together by defined relative movements of the mold sections with respect to one another. After the joining process, the one mold section is released first and then the assembled core is ejected from the other mold section.

Abstract: Molding sand loading and injecting head comprising a vertical cylindrical injecting chamber adapted to be placed in contact with a core box placed below the chamber and provided with an annular tank for compressed air associated with a movable-shutter device adapted to send the compressed air into the chamber both axially and transversely thereto. The head has support and guiding sleeves including an inner sleeve rigid with the chamber and an outer coaxial sleeve rigid with a supporting frame work. The head further comprises a hydraulically operated distributing valve, arranged coaxially to the chamber and associated with the compressed air distribution shutter, for vertically moving the chamber and the related shutter in both directions.

Abstract: A core box assembly includes an outer aluminum box containing an inner plastic or wooden mold section having a core depression therein adapted to receive mold sand. A strike-off surface on the box and mold section surrounds an opening providing access to the core depression. A peripheral portion of the strike-off surface is removed so that a step is formed around the periphery of the aluminum box. A portion of flat steel plate is formed with a centrally disposed opening therethrough and is fixed on the assembly with its upper surface in the plane of the strike-off surface, its outer boundary coincident with the outer boundary of the aluminum box, and its inner boundary abutting the step.

Abstract: Device for rapidly locking core boxes on respective supporting plates, comprising a pin vertically rigidly attached to the base of a core box and freely insertable in a corresponding first hole extending in the supporting plate, at least one recess in the pin, defining an engagement portion for a cam element mounted rotatably, without axial translatory motion, within the supporting plate in such a position as to interfere, only with a protruding part thereof, with the recess so as to lock the pin to the supporting plate and to disengage the pin after the partial rotation of the cam element, retention members being furthermore provided for the cam element, preventing axial translatory motion thereof. The cam element furthermore comprises an end tang protruding from the supporting plate, for rotating the cam element by a key and the like.

Abstract: The invention relates to a combined tooling assembly and inspection device having a tooling support with a double tooling mounting, which can be turned about a horizontal axis, for attaching to core and shell shooters and includes a base frame, equipped with a movable slide, a hinged table with a cylinder and gripping device, and a tooling mounting with a gripping device and arm grippers for fastening the fixed tooling half and the movable tooling half. The device according to the invention is used for positioning heavy toolings for fixing to the tooling support, by which means the time-consuming, manual interchanging of the toolings is abolished.

Abstract: A core assembly is formed by molding a destructible plastic form in abutting relation to a rigid bonded core. The core assembly can be used for casting large or long and thin castings. The rigid bonded core reinforces the plastic form against flexural and torsional forces as well as forces within the plastic tending to change the dimensional configuration of the plastic form.

Abstract: A moulding machine equipped with longitudinal laminating core boxes, characterized in that a plurality of sub-movable die plates are arranged between a fixed die plate and a main movable die plate, and the main movable plate and a plurality of the sub-movable die plates are interlockingly connected by a connecting device and a U-shaped die plate for the moulding machine, in which the die plate has U-shaped cavities where a core box is inserted, in the moulding machine equipped with longitudinal laminating core boxes, in which a plurality of the sub-movable die plates are arranged between the fixed die plate and the main movable die plate, and the main movable plate and a plurality of the sub-movable die plates are interlockingly connected by a connecting device.

Abstract: A machine for making molds and molding cores (126) includes a pair of mold boxes (42a, 42b) removably mounted on a frame (60) for rotation between an upright, molding position in which molding mateiral is introduced into the molding cavity of the molding boxes (42a, 42b) by a carrier (26) and an inverted discharge position in which the mold (126) is removed from the boxes by a mold receiving assembly (76). A pressure head assembly (46) both compresses molding material within the molding cavity and introduces a catalyst gas into the cavity for curing the molding material. A system for removing the spent gas from the molding cavity includes a pair of gas receiving chambers (122a, 122b) integral with the frame (60) which receives gas through the bottom of the mold boxes (42a, 42b) and an exhaust assembly (68, 70) which is selectively coupled with exhaust ports (124a, 124b) in the chambers (122a, 122b ).

Abstract: A machine for making molds and molding cores (126) includes a pair of mold boxes (42a, 42b) removably mounted on a frame (60) for rotation between an upright, molding position in which molding material is introduced into the molding cavity of the molding boxes (42a, 42b) by a carrier (26) and an inverted discharge position in which the mold (126) is removed from the boxes by a mold receiving assembly (76). A pressure head assembly (46) both compresses molding material within the molding cavity and introduces a catalyst gas into the cavity for curing the molding material. A system for removing the spent gas from the molding cavity includes a pair of gas receiving chambers (122a, 122b) integral with the frame (60) which receives gas through the bottom of the mold boxes (42a, 42b) and an exhaust assembly (68, 70) which is selectively coupled with exhaust ports (124a, 124b) in the chambers (122a, 122b ).

Abstract: A core or shell blow (shoot) machine, equipped with a quick core-box change device, makes it possible to carry out a quick core-box change in just a few minutes, thereby reducing down time. For this purpose, the core-box change device consists of a twin carrier which is swung hydraulically in a horizontal plane about a vertical axis. The care-box in the machine, after picking up the cope and the cope ejector plate, is lowered by the lift table into the carrier, after hydraulic clamps between the table and the core-box bolster have been released. The core-box change device is then rotated 180.degree., which swings the old core-box out of the machine and, simultaneously, swings the new core-box stack-up into the machine over the lift table. In the meantime, the old blow-plate is removed from the sand magazine, outside of the machine, using the blow-plate removal device.

Abstract: A molding machine for molding-sane cores employing openable dies and an injection head with a cylindrical chamber, comprising a compressed air tank coaxial with the chamber, shutters for feeding air at the top of the chamber, movable supports for the head for shifting the head both horizontally and vertically from the working position to a lateral one, a raising piston connected to the lower die for vertically shifting the lower die against and away from the fixed upper die, a drilled gassing plate for gassing the core formed within the closed dies, mounted movable away from and towards the fixed upper die, a plate having dowels for raising and extracting the core formed by the lower die after it has been lowered relatively to the fixed one, an openable collet movable away from and towards the core in extracted position from the lower die and movable outside the machine to a finishing (trimming) station, programmed control and operating devices for obtaining the sequence of the operating phases, and extractio

Abstract: An apparatus for producing a hollow foundry core, whereby core halves are first formed and fully hardened on an inner hollow-mold part and an outer mold-box half. These core halves are then sprayed with an adhesive and joined to form a finished foundry core. The apparatus reduces the production costs and improves the accuracy as to the size of the cores. The forming of the core halves on a center plate and the bringing together of the core halves respectively occurs by moving together both core-box halves in one operation.

Abstract: Mold parts are produced in accordance with a cold box procedure with passing a gaseous catalyst during curing, wherein for improvement of the application characteristics before/during curing, a gradient of properties within the mold part is caused such that the resistance of the surface layer of the mold part is increased relative to the resistance of the interior of the mold part.

Abstract: An entirely automatic, cold box type machine for molding an integral connecting core, which machine is provided with a sand blowing mechanism and a gassing mechanism, these mechanisms being suspended above an upper frame of the molding machine and traversable, and with a liftable drag car being mounted on the platform of the molding machine, characterized in that a rotatable connecting core feeding device is provided at one side portion outside the molding machine, a reversing unloader is provided at the other side portion, and a connecting core transfer car having a connecting core lifting device is traversably suspended from the upper frame in parallel with the sand blowing mechanism and the gassing mechanism.

Abstract: An entirely automatic, cold box type machine for molding an integral connecting core, which machine is provided with a sand blowing mechanism and a gassing mechanism, these mechanisms being suspended above an upper frame of the molding machine and traversable, and with a liftable drag car being mounted on the platform of the molding machine, characterized in that a rotatable connecting core feeding device is provided at one side portion outside the molding machine, a reversing unloader is provided at the other side portion, and a connecting core transfer car having a connecting core lifting device is traversably suspended from the upper frame in parallel with the sand blowing mechanism and the gassing mechanism.

Abstract: A method of producing a pattern for use in the manufacture of a mold which is adapted to be cured by microwave irradiation. The method comprises forming a rolled-over male pattern, forming a rolled-over female pattern having a scale-off layer along a boundary thereof with the male pattern, removing the scale-off layer, pouring a silicone RTV rubber into a cavity of the female pattern to form a match plate therein, setting a metallic frame on the match plate, filling the interior of the metallic frame with a mixture of microwave-pervious resin and dry silica sand, causing the mixture to be thermally cured thereby forming a reinforcing layer on the peripheral surface of the match plate, placing the male pattern within the reinforcing layer after removing the match plate therefrom, and injecting a microwave-pervious silicone rubber into the gap formed between the reinforcing layer and the male pattern thereby forming a mold defining layer on the inner surface of the reinforcing layer.

Abstract: An apparatus for the production of cores from fluidized sands in hot boxes comprises individual mechanisms for joining and disjoining top and bottom sections of core boxes, which are placed beyond the confines of the latter. The joining mechanism incorporates at least two spring-loaded grapples mounted on individual shafts, fitted in satellites and positioned on a transport device, so as to carry core boxes. Located at one end of each grapple is a wedging member which co-operates with a wedging member provided on the top section of each core box. The disjoining mechanism includes stops, positioned on a support frame, and rollers mounted on the other end of each grapple for interaction with the stops.

Abstract: A foundry core or mold machine utilizes a horizontally extending frame pivoted at one end which fixedly supports one box half or cope and movably supports the other box half or drag. A power actuator pivots the frame to clamp the box halves closed against a blow head or gassing head which may be shuttled thereabove. The drag box half is mounted on a cradle on the frame for movement toward and away from the cope or fixed box half and for pivoting movement to bring the box to a core or mold discharge or an inspection or disassembly position when the box halves are not clamped against the blow head or gassing head. Each box half includes a machine actuated stripping mechanism to insure removal of the core or mold both from the cope and drag with the latter then placing the core on a discharge conveyor. The conveyor may be of the flat belt type canted slightly to present a flat surface to receive the core or mold.

Abstract: A foundry core making machine is disclosed which produces large or fragile cores. The core is initially made in two parts, which are later adhered together by movement between first and second stations. The separate core halves are made in third and fourth stations and then relatively moved to be in the first and second stations, vertically one above the other, and with flat surfaces facing each other. The core box booking means is utilized to move the lower core half upwardly against the upper core half to have the two adhere together. This same booking means was previously used to press vent grooves in one core half so that when the two core halves were assembled, a generally centrally extending core venting aperture was established. The core box ejection means then ejects the completed core from one core box in a carefully controlled movement.

Abstract: A feature of the present invention is that an apparatus for manufacturing foundry cores is provided with a device for fastening together halves of core boxes, located before a heating chamber, and with a device for unfastening the halves of the core boxes, arranged behind the heating chamber, each of the core boxes comprising two horizontal rods with conical elements placed in the bottom half thereof and cooperating with the above devices for fastening and unfastening the core boxes, and two vertical rods secured to the top half of the core boxes and having at their bottom ends slots and conical orifices cooperating with the conical elements of the horizontal rods.

Abstract: A novel gate for use in a gate valve is provided with a cylindrical port which extends from the gate's upstream face to a downstream face. Sand grooves are provided on each face and passages extending in a radial direction from the port's cylindrical wall to the grooves are also provided. The passages are thus aligned with their longitudinal axes being generally perpendicular to the direction of fluid flow which enhances flushing of particles such as sand or scale from the grooves. A novel shell core and core box for making same are also disclosed.

Abstract: Disclosed is a rotary-type continuous motion core making machine capable of carrying a number of core mold boxes, each supported on a carrier adapted to move up and down, a sand distributing system adapted to inject a foundry sand mix into each of the core boxes, and a manifold system for distributing curing and purging gases to the core boxes. The machine is capable of completing a core/mold production cycle in a single circle of turret revolution. The vertical movement of the core box carrier, horizontal radial movement of portions of the gas manifold system, and movements of other parts of the machine are generated by the turret rotation and are controlled by a number of stationary contoured cam tracks. Disclosed also is a novel catalyst gas generating system, a core box assembly containing ejector pins in the top portion thereof, and a system for collecting and assembling components into a unified core and mold assembly.

Abstract: It is known to harden foundry cores by admixing a polymerizable material therewith and then curing by addition of a catalyst. Means are provided for injecting gaseous catalysts and compressed air, sequentially, into the die which contains the admixture of polymerizable material and foundry core material. In accordance with the invention, the gaseous catalyst and compressed air respectively, are injected into the die containing the mixture of foundry material in measured desired amounts and very rapidly.

Abstract: A shaped mass of particulate material such as foundry sand, admixed with a polymerizable binder, is instantly completely hardened by contact of gas catalyst therewith. The preferred method and apparatus in accordance with the present invention involves first inducing a vacuum within the shaping space of the shaping element and includes employing means for catalyst gassing of the space within the shaping element rather than of the space within the chamber in which the shaping element resides. In addition, a relatively small "aftervoid" chamber is provided and is connected to the shaping cavity at some location therein which is approximately opposite the location of the gas catalyst inlet. The latter eliminates uncured pockets which tended to result from prior methods and apparatus.

Abstract: A method of making a number of foundry cores serially in which a foundry aggregate mixed with a curable binder is introduced into a core box cavity to form each green core which is gassed by passing into it a predetermined dose of a saturated vapor under pressure of a normally liquid curing agent for the binder and an inert carrier gas and then a purging gas is passed through the core to drive out unreacted curing agent. A ready supply of a saturated vapor of the curing agent is provided in a generating vessel. Once a body of the active liquid substance and overlying atmosphere of vapor is established in the generating vessel, the vapor is dispensed intermittently to the core box cavity in a series of bursts, one for each core gassed. Simultaneously with the dispensing of each burst, carrier gas is bubbled under pressure into a bottom zone of the vessel in minute bubbles so as to provide saturated vapor, replacing that dispensed.

Abstract: An apparatus and method for forming foundry cores and molds of superior hardness and uniformity in a wide range of sizes includes staging hoppers for storing a first mass of sand coated with a catalyst-polymerizable resin film, and a second mass of sand coated with a catalyst film for polymerizing the resin. In forming the cores or molds these masses are evenly dispersed into a high velocity carrier air-sand stream and directed through a static mixer, wherein the resin and catalyst-coated sand particles are intermingled and at least a partial integration of the films takes place, into a shaping mold cavity, wherein the sand mixture hardens into a desired shape. Control circuitry is provided to independently control the dispersal of the catalyst and resin sand masses to enable the system to be fine tuned to produce cores of improved quality and uniformity.

Abstract: The two halves of the core box in a core blowing machine are mounted on a carrier which may be turned 180.degree. between a blowing position in which sand is blown into the closed core box and a discharging position in which the core box halves are separated in the direction of the axis of rotation and the molded core is ejected. A transfer receptacle moves into the discharging zone between the separated core box halves to receive the ejected core and to withdraw it from the discharging zone while the core box is again being closed and simultaneously turned with the carrier into the blowing position.

Abstract: An apparatus and method for forming foundry cores and molds of superior hardness and uniformity in a wide range of sizes includes staging hoppers for storing under pressure a first mass of sand coated with a catalyst-polymerizable resin film, and a second mass of sand coated with a catalyst film for polymerizing the resin. In forming the cores or molds these masses are simultaneously and evenly dispersed from the hoppers into a high velocity carrier air-sand stream and directed through a static mixer, wherein the resin and catalyst-coated sand particles are intermingled and at least a partial integration of the films takes place, into a shaping mold cavity, wherein the sand mixture hardens into a desired shape. The staging hoppers each include a pressurized infeed portion void of sand to provide more even feeding from the hoppers into the air-sand stream to produce cores of improved consistency.

Abstract: Core conveyor means of the endless type moving synchronously or non-synchronously with one or more continuous casting devices is disposed in side-by-side relation with the continuous casting device or devices, and the conveyor means is moved in the same direction as the molds moving in the continuous casting device or devices. The cores supplied from a core supply source which may be a core making machine, a group of core making machines consisting of two or more core making machines or a core cage stack hose with stacker crane are fed through the agency of the core conveyor means to the continuous casting device or devices. By this arrangement, it is possible to supply cores quickly or smoothly or supply large numbers of cores of different types with a high degree of efficiency to the casting device or devices.

Abstract: A pair of generally rectangular core box mounting plates are cast from aluminum. Each plate includes a plurality of parallel spaced ribs extending outwardly from a surface of the plate to define channels therebetween permitting excape of compressed air and sand from core boxes positioned between a pair of such plates. Extending along and sealing one edge of the channels is a ridge which directs the sand, air and gases from the core box to the open ends of the channels. Mounting flanges are provided such that the structure consisting of the core box mounted to the plates can in turn be secured to a shell core machine. In order to accommodate relatively small core boxes, a plurality of the ribs are shortened to provide lands which can accommodate spacer blocks so that a pair of universal plates can be used for different sized core boxes.