Abstract: A hair dryer (10) has a hand-held housing comprising an air inlet (12), an air outlet (14), a motor (1) between said air inlet (12) and said air outlet (14) to draw air in from said air inlet (12) and drive air out from said air outlet (14). A heating element (17) is located in said air flow between said air inlet (12) and said air outlet (14). The hair dryer (10) further comprises a filter on said air inlet (12). The filter comprises a metal filter plate (20) bearing a plurality of holes, wherein at least some of said holes have a maximum lateral dimension of less than 1.5 mm and wherein vertical walls of said holes through a thickness of said filter plate are substantially straight or at least partially concave.

Abstract: An apparatus and method for molding a freight car yoke with a one piece core is disclosed herein. An exemplary one piece core may be used with a core mold upper half and a core mold lower half mated at a common split line to define a mold cavity which replicates the molded exterior features of a freight car yoke. The one piece core may replicate all of the molded internal features of a freight car yoke. An apparatus may use a pair of one piece cores to produce a pair of freight car yokes. An exemplary method can utilize the apparatus to produce a pair of freight car yokes through a single pour, using a pair of one piece cores. In an exemplary embodiment the one piece cores are constructed from a cold box with phenolic urethane treated molding sand.

Abstract: The invention relates to sand casting and more specifically to sand casting of a heat exchanger element with pins and/or fins. The invention provides a core box for sand casting of workpieces comprising pins and/or fins. The core box molding surface comprises at least one air vent and pins and/or fins. The at least one air vent is integrated in at least one pin or fin.

Abstract: A method for producing sand cores for foundry, comprising the operations of: defining a molding cavity; blowing in a mixture of sand and hydrated binder into said molding cavity so as to produce a mass of sand, which reproduces in a complementary way the shape of said molding cavity; and producing the passage, through said mass of sand, of a flow of aeriform along at least one principal direction. The method comprises the operation of generating through said mass of sand a flow of aeriform, directed at least in part in a radial direction with respect to said principal direction.

Abstract: An apparatus for curing foundry cores 100 is provided, including a first curing agent supply 110 passing through foundry core 145 primarily through first directional plane 130 and a secondary curing agent supply 160 passing through the foundry core 145 primarily through a secondary directional plane 170.

Abstract: The removal of bonded sand, either core sand or mold sand, from a metal casting comprises placing the metal casting in a furnace chamber and subjecting the metal casting to the action of a high velocity heated gas stream (preferably above 3000 ft/minute) from hot air generators positioned on opposite sides of the chamber at the approximate level of the metal casting and directed to the metal casting. The heated gas stream is at a temperature and oxygen content sufficient to oxidize the binder in the bonded sand and a velocity sufficient to remove the debonded sand. The sand is removed by gravity from the furnace chamber.

Abstract: A vaporizable refractory coated pattern assembly is formed having a sprue connected to a plurality of thin wall patterns of articles to be cast. The pattern assembly is supported in a refractory particulate media in an open bottom container that is evacuated to subambient pressure and rotated in a manner to distribute particulates to regions of the refractory coated patterns not yet directly contacted by particulates. The pattern assembly is comprised of relatively dense foam plastic pattern material that imparts increased strength to the thin wall patterns. The sprue includes a vent passage that communicates to a particulate media to vent pattern decomposition vapors thereto in a manner that enables faster replacement of the pattern assembly in the media, despite the use of the relatively dense pattern material.

Abstract: The core box includes a cavity therein, a vent in fluid communication with the cavity, ejector members, and apparatus coupled to the ejector members for passing a fluid through the vent into the cavity.

Abstract: A core box has a thick walled cope and a thin walled metal drag mating in essentially a horizontal parting plane. The cope and drag each have ports therethrough screened to prevent passage of sand, the ports communicating with the interior of the core box. Resilient seals seal and reseal the cope and drag at the parting plane. A convection heater delivers a heated gas, to drag ports and thence out through the ports of the cope, the convection heater having a heat conductive manifold attached to and along the drag for augmenting the heat of the gas as it passes to the ports of the drag. Conduction heater (burner units) directly heats both the cope and manifold and thereby the interior of the core box by conduction. The convection heater heats the gas in two stages, first to a temperature level outside the core box and manifold and thence to a second temperature level elevated by exposure to the manifold. The temperature levels are respectively about 175.degree.-225.degree. F. and 250.degree.-290.degree. F.

Abstract: The core box vent useful in core making, comprises a porous cylinder of sintered ceramic materials, the pores of such cylinder being less than will allow intrusion of the grain size of sand to be introduced to the core box. A method of making cores using the above vent comprises, first, providing mateable core box sections with blow tubes permitting introduction of an air fluidized sand mixture into the interior of such box sections and providing one or more ceramic core box vents in an exhaust side of the mating core box sections to permit egress of air used to fluidize the sand mixture the vents have a labyrinth of passages or pores smaller in diameter at least than the average grain size of the sand in the mixture sand and resin mixture is blown into the interior of the mated core box sections, with the resin being curable to polyurethane by chemical reaction. Next a catalyst curing gas is blown through the mixture via such blow tubes. Lastly, the mixture is purged with air.

Abstract: In a wear plate (16) with a number of air-escape nozzles, in the example shown consisting of annular gaps (27) formed between bores (17) in the wear plate (16) and nozzle members (21) screwed into the bores (17) to make the mold-chamber faces (26) on the nozzle members (21) align with the mold-chamber surface (20) on the wear plate (16) in order to avoid problems when a finished mold or mold part is moved slidingly along the mold-chamber surface (20), the novel feature consists in that the nozzle members (21) have been screwed tight against an abutment tool (23) held temporarily in close abutment (not with a small gap as shown) against the mold-chamber surface on the wear plate (16), after which the nozzle members (21) have been secured in the position of alignment achieved in a suitable manner, such as by using a settable cement (30) filling the spaces between the thread (18) in the bores (17) and the thread (22 ) on the nozzle members (21) and keeping flanks (31) on the nozzle-member thread (22) in engageme

Abstract: The core box has a drag and a cope forming a mold cavity for forming a sand base core. This sand is injected into the cope and the air in the cavity is vented through vents remote or spaced away from where the sand is inserted. These vents are usually in the drag, but may also be in the cope. In each vent adjacent the cavity is a cylindrical cup-shaped plug having slotted perforations in its bottom narrower than the diameter of the sand grains. The diameter of this perforated vent plug is at least 50% greater and preferably at least twice the width of the cavity, slot, or groove at the vent whereby air can be vented along the cavity. Furthermore, the plug having the perforations may be contoured to the groove or that portion of the cavity in which the vent is located so that air can also be vented from the sides of the cavity or groove.

Abstract: In a process for producing mouldings, into whose interior is introduced a medium, particularly for producing core boxes for core shooting, in the mould cavity are provided ventilating holes or vents which are occupied by nozzles. During the moulding of the moulded part or a core member arranged therein, particularly the core box, at least one insert is inserted, whose shape corresponds to that of the nozzle. After the moulding of the core box the insert is removed and replaced by the nozzle.

Abstract: A core box for producing casting cores having a core defining member made of a first material and defining a core molding cavity. A stream of molding substance is introduced into the core molding cavity when a core is molded. A core marker is made of a second material and is located in the core member in fluid communication with the cavity. The second material is more wear-resistant than the first material, being a non-deformable hard metal. The core marker is a shaped insert for defining a predetermined configuration of a casting core when a molding substance is introduced into the core molding cavity. The shaped insert is located at a position within the core molding cavity at which position high velocity flow or changing velocity flow of a stream of molding substance is intercepted.

Abstract: A conical vent (14) for a cartridge (10) is located on an inner surface (20) of the cartridge. The conical vent includes a conical-shaped member (26) having a base (28) and an apex (30). An opening (32) extends through the center of the conical-shaped member (26) to provide an air passage for a cartridge (10). The opening (32) is adapted to create a capillary force on a small amount of liquid (59) that might enter the opening to prevent any remaining liquid from leaking through the opening. The vent also includes a groove or capillary trap (34) that encircles the base of the conical-shaped member. Also, a pair of upright walls (36) and (38) surround the conical-shaped member and cooperate with the capillary trap to divert liquid to the base of the conical-shaped member and away from its apex.

Abstract: A vent plug used in a chamber for manufacturing sand molds by a blow-squeeze process is configured to provide turbulent swirling flow of air vented from the chamber past the vent plugs to minimize build-up of deposits on the surfaces of the vents and vent plugs.

Abstract: A machine for making mould cores from flowable sand mixtures in hot multi core boxes including a supporting frame carrying a conveyor whereon core boxes are placed, each of the boxes having a top and a bottom piece and mechanically interlinked main and additional gates. The gates are adapted to close or open respectively the central and peripheral core print openings of the core boxes while interacting with their respective individual drives. When the main gate and one of the additional gates interact with their respective individual drives made fast on the supporting frame at the pressing mechanism, they close respectively the central and peripheral core print openings. When the main gate and the other additional gate interact with their other individual drives made fast on the supporting frame before the splitting-up mechanism, they open the central and peripheral core print openings.

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 method for forming at least one air vent or hole in a casting mold made of molding said and having a top flask with at least one blind hole originating at its parting plane with a bottom flask comprises the steps of pressurizing the mold cavity and drilling the air vent or hole into communication with the blind hole while drawing off the materials produced by drilling directly at the drilling point. An apparatus for performing the above-noted method includes, according to a preferred embodiment, a source of compressed gas having a pressure hood mountable over the inlet of the mold, and a drilling tool disposed within a suction hood which is placed in a sealing engagement with the top flask after the drilling tool has been properly aligned with the blind hole that is to form part of the air vent or hole.

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.