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| Number | Title | Issue Date |
| 7300197 | Apparatus for dissolving a solid material in a liquid An apparatus for dissolving a solid material in a liquid including a container for receiving the solid material and the liquid. A turbidimeter measures the turbidity of the liquid in the container. A blender stirs the liquid in the container until the turbidity ther... | 11/27/2007 |
| 7273780 | Semiconductor device having box-shaped cylindrical storage nodes and fabrication method thereof A method of forming box-shaped cylindrical storage nodes includes forming an interlayer insulating layer on a semiconductor substrate. Buried contact plugs are formed to penetrate the interlayer insulating layer. A molding layer and a photoresist layer are then sequ... | 09/25/2007 |
| 7270169 | Method and apparatus for pouring several moulds in a mould-string plant in one pouring operation In a method for pouring several moulds in a mould-string plant in the pouring operation, the moulds are produced by compression of sand or similar mould material in a pressing chamber comprising pattern plates 3, 4 for providing impressions in the surfaces of... | 09/18/2007 |
| 7237375 | Investment cast, stainless steel chain link and casting process therefor An investment cast, stainless steel chain link is provided for chains used in water and wastewater treatment. The chain link comprises a pair of spaced apart, elongated sidebars having forward ends and rearward ends. The forward ends are spread apart and are provide... | 07/03/2007 |
| 7128129 | Investment casting slurry composition and method of use A composition and method for forming investment casting shells includes using colloidal silica, zircon flour, and fused silica in a slurry which is applied to a pattern. After the slurry is applied to the pattern, it is allowed to partially or completely solidify. A... | 10/31/2006 |
| 7073557 | Method of drying a sand mold using a vacuum A method of drying a sand mold mixture containing moisture includes restraining the sand mold mixture and exposing the sand mold mixture to a vacuum. The vacuum flashes off the moisture within the sand mold mixture thereby drying the sand mold mixture to create a so... | 07/11/2006 |
| 7036552 | Method and device for hardening foundry cores The invention relates to a method for hardening foundry cores from sand-containing molding materials. The core, for the purpose of hardening it, is subjected to a catalyst vapor/gas mixture in a core molding tool (20). and then to a pressurized air flow, at a... | 05/02/2006 |
| 6923240 | Process and apparatus for producing casting cores 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 sa... | 08/02/2005 |
| 6868892 | Ceramic fiber core for casting There is provided a ceramic fiber casting core used in making cast metal parts comprised of a ceramic fiber structure. The casting core may further comprise a support tube in structural supporting relation to the ceramic fiber structure. There is also provided a met... | 03/22/2005 |
| 6668904 | Method and apparatus for producing casting moulds or mould parts In a mould forming machine comprising a moulding chamber, a movable squeeze plate and a pattern, the filling of selected parts of the pattern with compressible mould material is improved by applying vacuum to said selected parts. By applying the vacuum se... | 12/30/2003 |
| 6666254 | Method for the uphill casting of cast pieces in sand moulds with controlled solidification A method is described for uphill casting in sand molds with high-resin casting cores or especially casting cores containing binders, and with directed solidification of metallic castings that have at least one cavity. In particular, these are prototypes o... | 12/23/2003 |
| 6634410 | Mold apparatus and method A mold apparatus and method for creating designs on the interior of molds includes a resilient form with an exterior and an interior, with a design formed on the exterior. A rigid support member is removably attached to the interior of the resilient form.... | 10/21/2003 |
| 6371194 | Method for producing core preforms and recycling core sand for a foundry The invention relates to a method for the production of core preforms for foundry in which a) a mixture of inorganic, refractory foundry sand and a water glass-based inorganic binder is produced, b) the mixture is poured into a heated core box c) the wate... | 04/16/2002 |
| 6315028 | Equipment for circulating box containing model for making mold under reduced pressures Equipment for circulating a box containing a model and having a space in it for making a mold under reduced pressures is provided. It comprises walking conveyors 1 and 2, a traverser 3a that reciprocates along a line that combines the end of the walking c... | 11/13/2001 |
| 6209617 | Sealing riser sleeve 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 se... | 04/03/2001 |
| 5957189 | Apparatus and method for sequentially feeding quantities of sand into a mold space and subjecting the space to evacuation and then pressure increase after each feed A first quantity of all the molding sand necessary to produce a mold is fed in the mold space, the first quantity being one of at least two parts divided from the total molding sand. The mold space is evacuated and then air is introduced into the mold spa... | 09/28/1999 |
| 5881794 | Apparatus and method for producing shell-like molds An apparatus to produce a shell-like mold by vacuum sucking molding sand into a shell-like cavity defined by a cope and a drag is disclosed. The apparatus includes a drag and a cope mounted on the drag so that they define a shell-like cavity between them.... | 03/16/1999 |
| 5791040 | Method for making ceramic tools for the production of micromagnets A method for making ceramic, micro-electromechanical tools which can be used for the production of micromagnets with a multi-pole, micro-polarization pattern. The method includes the steps of molding a plurality of base elements in the form of a generally... | 08/11/1998 |
| 5558148 | Method of producing molds Molding sand (5) is fed into a space defined by a pattern plate (2) and a flask (3) mounted on the pattern plate (2), and the space is enclosed at the upper part of the flask (3) by a cover (6). The air in the enclosed space is evacuated to reduce the air... | 09/24/1996 |
| 5388630 | Method of manufacturing core and mold A method of manufacturing a core and a mold for manufacturing a core or a mold using self-hardening molding sand or gas-hardening molding sand, wherein the self-hardening molding sand or the gas-hardening molding sand is charged in a core pattern or a fla... | 02/14/1995 |
| 5219014 | Device and method for fabricating foundry molds from granular material The invention concerns a device and method for continuous fabricating of foundry molds from granular material. The device consists of a frame (10) with lights (11) supporting through swivels (31) caissons (30, 40) with large partitions (42) provided with ... | 06/15/1993 |
| 5161603 | Method for production of single-use foundry molds and apparatus for realization thereof A molding chamber (7) accommodating pattern plates (24, 25) is supplied by a steam of air with sand mixture delivered in a direction parallel to the pattern plates (24, 25). After a time delay relative to the start of the sand delivery operation, and sand... | 11/10/1992 |
| 5137091 | Process of producing molded body from green molding sand Green sand is packed as molding sand into a compression mold and the green sand is precompacted in the mold using a hydraulic press and thereafter is finally compacted after the precompaction wherein prior to precompaction recesses formed in the molding t... | 08/11/1992 |
| 5062466 | Countergravity casting apparatus and method In vacuum countergravity casting a melt into a mold sealingly engaged to a vacuum container by an elastomeric sealing gasket, the sealing gasket is isolated from the heat of an underlying source of the melt and from contact therewith during casting by sub... | 11/05/1991 |
| 5062467 | Vacuum countergravity casting apparatus and method Vacuum countergravity casting apparatus and process employ a container having a peripheral wall defining an open bottom chamber that receives one or more molds or destructible patterns. A first inherently unstable mass of particulates (e.g., binderless sa... | 11/05/1991 |
| 4971131 | Countergravity casting using particulate filled vacuum chambers Particulate mold material, such as binderless foundry sand, is vacuumed upwardly from a particulate bed into an open bottom container about one or more gas permeable molds or destructible patterns in the container to form a casting assembly adapted for im... | 11/20/1990 |
| 4958674 | Full mold casting process and device 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 tamping it in. Casting metal is poured on the thermally decomposable model a... | 09/25/1990 |
| 4957153 | Countergravity casting apparatus and method In an apparatus for vacuum countergravity casting of molten metal, a gas permeable, self-supporting mold is supported in an inverted casting position in an open bottom container with a particulate bed compacted about the mold. The mold may comprise a mold... | 09/18/1990 |
| 4947923 | Method and apparatus for evaporative pattern casting The method and apparatus are based on the use of a casting process in which expendable patterns are made of a low density material, then evaporated by molten metal as the metal advances into the cavity created by the evaporation of the pattern material. T... | 08/14/1990 |
| 4943398 | Method for manufacturing a fused cast refractory A method for manufacturing a fused cast refractory article including the steps of pouring a molten refractory material into a cavity of a mold including a casting sand held by a negative pressure applied through the sand and against a thermoplastic film w... | 07/24/1990 |
| 4921035 | Process for compacting powdery materials A process for compacting powdery materials is initiated by a pressure surge in which a surge G1 acts at a time t1 on the surface of the powdery material and, at the same time, a surge G2 is applied at a time t2 ... | 05/01/1990 |
| 4915159 | Method and apparatus for compacting foundry mold making material about a foundry mold pattern To permit close matching of compaction pressure being applied to foundry mold making material, such as foundry sand, to the shape of a mold pattern (2) in a pattern box (3, 4), individual fluid pressure is applied to a plurality of press plungers (7) loca... | 04/10/1990 |
| 4791974 | Method and an apparatus for producing shaped bodies from particulate material In a method of operating an apparatus with a mold chamber (8) being supplied with fluidized mold sand (2) from a supply chamber (1) under air pressure applied through suitable air channels (3), and in which the pressure in the supply chamber (1) is increa... | 12/20/1988 |
| 4724888 | Method and apparatus for the production of flaskless foundry molds A method and apparatus for producing flaskless foundry molds made up of copes and drags of wet casting foundry sand, which is blasted into a cavity to form the mold with the use of vacuum. The sand is pressed mechanically while aspirating air therefrom. T... | 02/16/1988 |
| 4694879 | Process for producing castings A process for production of castings is provided employing patterns combining gasifiable pattern parts, for the creation of nonconforming contours, with reusable pattern parts. After molding, only the reusable pattern parts are removed from the mold, whil... | 09/22/1987 |
| 4653568 | Foundry process and apparatus, including mixing investment composition under vacuum A foundry process and associated apparatus for providing mixing of water, an additive, and a casting (investment) for the automated powder, which once mixed, are to be delivered to molds to form casting molds such as in the fabrication of microwave compon... | 03/31/1987 |
| 4646809 | Method for the production of frozen mould bodies and apparatus for use in the carrying out of the method In the production of frozen moulds (12) or cores the freezing process is accelerated by drawing the liquefied freezing agent, such as nitrogen, used for freezing the water in the mould bodies, into or through the bodies by the application of a vacuum.... | 03/03/1987 |
| 4628983 | Method and apparatus for making hollow sheel cores with controlled gas flow An apparatus and method for making hollow shell cores wherein a core box assembly is provided including a vented pattern. Baffles are provided in the core box in the space between the pattern and the core box walls whereby a catalyst gas flowing into the ... | 12/16/1986 |
| 4623014 | Process for the production of precision castings Process for the production of precision castings with well-defined reproduction of detail and a great accuracy of measurement, by which the pattern to be reproduced is equipped with a drainage apparatus, having at least one duct extending outside the mold... | 11/18/1986 |
| 4612968 | Method of casting using expendable patterns A method of casting a metal article in a mould box comprises locating an expendable pattern in the box, the pattern having a gas permeable refractory coating thereon, placing and compacting unbonded particulate material about the pattern and supplying mol... | 09/23/1986 |
