Including Apertured Strainer Means For Separating Unwanted Component From Casting Material Patents (Class 164/358)
  • Patent number: 9597729
    Abstract: A method of transferring molten metal to a die casting mold is disclosed. The method includes providing a ladle with a dip well and a dispensing nozzle having a fluid metal filter formed therein as well as providing a receptacle fluidly between the ladle and the mold. Further the method includes delivering the molten metal from the ladle to the receptacle by positioning an exit face of the dispensing nozzle over the receptacle and rotating the ladle such that the exit face of the dispensing nozzle is repositioned proximal the bottom of the receptacle and conveying the molten metal that has been delivered to the receptacle into a mold cavity that is placed in fluid communication therewith.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: March 21, 2017
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David D. Goettsch, Brad A. Ohlrich, Jason R. Traub, Michael J. Walker
  • Patent number: 8939193
    Abstract: Method and apparatus for flowing molten metal substantially vertically into a mold by means of a feeder tube while concurrently impeding the flow of oxides that collect at the perimeter of the head of the feeder tube. This reduces inclusions in the molten metal and improves the quality of a molded component as the molten metal solidifies.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: January 27, 2015
    Inventors: Peio Todorov Stoyanov, Ching-Lung Wang
  • Patent number: 8794298
    Abstract: One embodiment of the present invention is a unique filter and a method for manufacturing the same. Another embodiment is a unique system for casting a metallic object. Another embodiment is a unique method of filtering a molten metal. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for filtering molten metal. Further embodiments, forms, features, aspects, benefits, and advantages of the present application shall become apparent from the description and figures provided herewith.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: August 5, 2014
    Assignee: Rolls-Royce Corporation
    Inventors: Max Eric Schlienger, Paul Anthony Withey, Michael Christopher Maguire, Michael Dean Baldwin
  • Patent number: 8656983
    Abstract: Of the many embodiments provided, one embodiment is a drill bit mold assembly comprising: a mold having a bottom and at least one side; a core centrally disposed within the mold; and a filter disposed above the bottom of the mold and within a space formed between the at least one side of the mold and the core.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: February 25, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jeffrey Thomas, Clayton Ownby, Ron Joy, Gary Weaver, Seth Anderle
  • Patent number: 8627874
    Abstract: A mold for casting metal which allows solid impurities to be removed from the molten metal. The mold (50) has a cavity therein, said cavity having a casting portion and contiguous therewith a running system upstream of the casting portion, said running system comprising an upstream inlet portion (58), a downstream outlet portion (60) and a swirl chamber (54) disposed between the inlet and outlet portions (58, 60), wherein a filter (62) is provided at an interface between the swirl chamber (54) and the outlet portion (60). The application also relates to a method for preparing the mold, a pattern for preparing the mold, a housing for use in the mold and a method for casting employing the mold.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: January 14, 2014
    Assignee: Foseco International Limited
    Inventors: Petr Filip, David Hrabina, Mairtin Burns
  • Patent number: 8490676
    Abstract: Four cavities are arranged on a concentric circle “C” with respect to the center “O” of a flow divider and a gate sleeve. Each of the cavities is connected to a sleeve stamp portion through each of four die side runners and each of four stamp side runners formed in a radial direction and separated from the neighboring runners. A semicircular arc-shaped reservoir is provided between the lower half side of the flow divider and the lower half side of the gate sleeve. This reservoir is connected to the sleeve stamp portion. A semi-solidified layer formed by pouring the molten metal into a sleeve is filled into the reservoir, so that the molten metal from which the semi-solidified layer is separated can be filled directly from each of the stamp side runners via the die side runners into each of the cavities evenly and simultaneously.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: July 23, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kiyoshi Shibata, Hideo Hazekawa, Keizou Tanoue, Masamitsu Yamashita
  • Patent number: 8186420
    Abstract: A mould for casting metal which allows solid impurities to be removed from the molten metal. The mould (50) has a cavity therein, said cavity having a casting portion and contiguous therewith a running system upstream of the casting portion, said running system comprising an upstream inlet portion (58), a downstream outlet portion (60) and a swirl chamber (54) disposed between the inlet and outlet portions (58,60), wherein a filter (62) is provided at an interface between the swirl chamber (54) and the outlet portion (60). The application also relates to a method for preparing the mould, a pattern for preparing the mould, a housing for use in the mould and a method for casting employing the mould.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: May 29, 2012
    Assignee: Foseco International Limited
    Inventors: Petr Filip, David Hrabina, Mairtin Burns
  • Patent number: 8096346
    Abstract: A method of casting a base of high-power wind turbines with low-temperature nodular graphite iron, using furan resin sand as the mold sand and having no risers or chills in the mold. The mold undergoes microseismic compaction and has no chills risers. The parting face of the mold is perpendicular to the ground. The molten iron in the mold is solidified evenly. Therefore, shrinkage holes and disperse shrinkages base are reduced greatly and the dregs and air are discharged easily for the base. The pouring system designed together with a reasonable pouring rate and time make the filtering system useful for blocking dregs.
    Type: Grant
    Filed: February 1, 2009
    Date of Patent: January 17, 2012
    Assignee: Jiangsu Jixin Wind Energy Technology Co., Ltd.
    Inventors: Yongluo Hua, Jianhong Wang, Yufang Chen, Qiang Wang, Yuebing Wu
  • Patent number: 7967053
    Abstract: This invention relates to filters made from a refractory material, preferably an insulating material, and chemical binder. The filters are used in the foundry industry to filter molten metal. The invention also relates to a process for preparing the filters.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: June 28, 2011
    Assignee: ASK Chemicals L.P.
    Inventors: Ronald C. Aufderheide, Ralph E. Showman
  • Patent number: 7712514
    Abstract: Methods for reducing inclusion content of sputter targets and targets so produced are disclosed. Inclusions may be reduced by adding a small amount of Si to the molten Al or molten Al alloy followed by filtering of the molten metals through a filter medium. Targets having substantially no inclusions therein of greater than about 400 ?m are especially useful in the sputtering of large flat panel displays and result, upon sputtering, in a reduction in the amount of macroparticles sputtered onto the substrate.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: May 11, 2010
    Assignee: Tosoh SMD, Inc.
    Inventors: Charles E. Wickersham, Jr., John E. Poole, Alexander Leybovich, Lin Zhu
  • Patent number: 7431069
    Abstract: A technique for pressurized or differential pressure casting according to the present disclosure provides a riser tube filter formed of ceramic foam having a specific gravity lower than the molten metal to be cast. A riser tube filter according to the present invention may float in and/or on the molten metal within the riser tube and smooth the flow of molten metal within the riser tube simultaneously filtering the metal. As the molten metal is depressurized, a riser tube filter according to the present disclosure will travel back down the riser tube engaging the walls of the riser tube and minimizing the surface of molten metal in contact with the air or other gas. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Grant
    Filed: January 6, 2005
    Date of Patent: October 7, 2008
    Inventor: Fu Shun Liang
  • Patent number: 7156145
    Abstract: A dispensing arrangement for inserting a part into a cast iron mold includes a dispenser apparatus configured to dispense a predetermined number of parts, a staging apparatus configured to position the parts in a selective orientation and a jig apparatus configured to grip and lift the parts from the staging apparatus and position the parts in a die of a mold. The apparatus may be located adjacent the mold in use.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: January 2, 2007
    Assignee: Toyota Motor Engineering & Manufacturing North America
    Inventor: Christopher E. Ulerick
  • Patent number: 7011133
    Abstract: A filter material for molten aluminum, the material subsequently dissolvable in molten aluminum to recover aluminum captured therein.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: March 14, 2006
    Inventor: C. Edward Eckert
  • Patent number: 6986380
    Abstract: Intervening fingers mounted within a mold gate cavity extend across a portion of the gate cavity and cooperate with one another to slow the flow of molten metal into the mold cavity and thereby reduce flow turbulence.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: January 17, 2006
    Assignee: Hayes Lemmerz International, Inc.
    Inventors: Steve Rice, Tim O'Banion
  • Patent number: 6948548
    Abstract: An apparatus for casting an ingot includes a molten metal reservoir (51) positioned at an upper portion, a casting chamber (5) positioned at a lower portion and a partition wall (3) between the reservoir and the chamber, a spruce (7) formed in the partition wall, an opening/closing plug (8) for opening and closing the sprue and control means for controlling an opening and closing operation of the plug. The casing chamber is defined in a mold (1) that includes a lower mold member (4), a side mold member (2) and the partition wall (3) that constitutes an upper mold member. At least one of the lower mold member, side mold member and upper mold member includes a plurality of divided sections (21,22) in accordance with a shape of a cast ingot C.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: September 27, 2005
    Assignee: Showa Denko K.K.
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Tomoo Uchida, Kunio Hirano
  • Patent number: 6913063
    Abstract: A dispensing arrangement for inserting a part into a cast iron mold includes a dispenser apparatus configured to dispense a predetermined number of parts, a staging apparatus configured to position the parts in a selective orientation and a jig apparatus configured to grip and lift the parts from the staging apparatus and position the parts in a die of a mold. The apparatus may be located adjacent the mold in use.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: July 5, 2005
    Assignee: Toyota Motor Manufacturing North America, Inc.
    Inventor: Christopher E. Ulerick
  • Patent number: 6860315
    Abstract: An apparatus and method for casting metallic components is disclosed. The apparatus has a vertical parting line and a gate configuration which reduces defects within the cast components.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: March 1, 2005
    Assignee: Copeland Corporation
    Inventor: Warren G. Williamson
  • Publication number: 20040238152
    Abstract: The present invention of a gating system comprises the use of modular gating system consisting of one or more filtering media flanked on at least one side by an evaporative foam layer, which is left inside the mold. The modular gating system permits the entry of metal to any surface of the mold without going through the parting line of the pattern.
    Type: Application
    Filed: May 26, 2004
    Publication date: December 2, 2004
    Inventors: Edgardo Campomanes, Patrick Campomanes
  • Patent number: 6648058
    Abstract: A modular casting system includes a plurality of casting modules and, is provided with on-board systems such as a lubrication system, cooling system, etc., which operate independently from similar systems on other modules of the system. Each of the casting modules is connected by quick disconnect connections to a centrally disposed source of fluid pressure and electrical power and a control unit for controlling each of the modules independently. Each of the modules is readily removable from the system and replaced with a new module of a different type or with a different mold. Each of the modules is preferably provided with a filter removal unit which is operative to raise the filter during the cooling operation and facilitates removal of the filter upon completion of the pouring operation. The upper platen of a casting module is provided with a swinging cope which is movable between a horizontal position and a vertical position to facilitate cleaning of the cope.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: November 18, 2003
    Inventors: Robert L. Macheske, Kenneth D. McKibben, Daniel D. Minor, Rick A. Van Horn
  • Patent number: 6619374
    Abstract: An apparatus for separating casting strainers and transferring each separated casting strainer to a predetermined position. The apparatus includes a casting strainer receiving member in which a plurality of casting strainers are stacked up, a slide member for horizontally sliding under the casting strainer receiving member, a separator projecting from the slide member towards the casting strainers, a casting strainer stopper formed at the lower end or vicinity of the casting strainer receiving member, a casting strainer passage formed in the slide member at an area immediately under a projecting end of the separator for receiving the separated casting strainer, and a shooter formed under the slide member for transferring the casting strainer to the predetermined position.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: September 16, 2003
    Assignee: Asaki Tec. Corporation
    Inventors: Toshiharu Morishita, Shigeru Tanaka
  • Publication number: 20020129919
    Abstract: A filter assembly for filtering molten metal poured into a mold includes a filter formed from refractory material, the filter having first and second porous surfaces through which molten metal may flow, and a peripheral surface and a locator attachable to at least one of the first, second and peripheral surfaces of the filter and arranged to extend from the at least one of the first, second and peripheral surfaces of the filter to another of the first, second and peripheral surfaces or to another part of those surface(s), during use. The locator locates the filter in a mold into which molten metal is poured.
    Type: Application
    Filed: May 1, 2002
    Publication date: September 19, 2002
    Applicant: FOSECO INTERNATIONAL LIMITED.
    Inventors: Philip Sandford, Richard B. Williams, Brian E. Began
  • Patent number: 6450236
    Abstract: A method of ascending casting in a casting cavity where filling from the bottom results in a region of reduced pressure formed during the cooling in which solidification can be expected to take place last. The region is post-fed with molten material from a shortest possible feeding duct. By doing this, the consumption of casting metal is reduced, because it is no longer necessary to use a surplus of molten material to keep the bottom ingate open for feeding purposes and the consumption of mold material is also reduced because it is no longer necessary to adapt the mold to accommodate surplus molten material.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: September 17, 2002
    Assignee: Georg Fischer Disa A/S
    Inventors: Peter Iversen, Uffe Andersen
  • Patent number: 6216768
    Abstract: The ratio of the number of free holes (4a) in a filtering plate (2, 3), located in the areas (9) which are not covered by the an insert (7) of treating material, on the one hand, to the total number of holes (4, 4a) in said filtering plate (2, 3), on the other hand, is not less than 10% and/or not above 75%.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: April 17, 2001
    Assignee: Daussan et Compagnie
    Inventors: Jean Daussan, Gérard Daussan, André Daussan
  • Patent number: 6199619
    Abstract: In an arrangement of an ingate system with feeding reservoir for feeding castings, preferably in moulds with pouring form the bottom (ascending casting), with which ingate system at least a feeding reservoir is connected. The ingate system is connected to one or a number of mould cavities least one feeding reservoir (7) is provided consituting a widened part of a duct (4) or a part of a duct in the ingate system (1), and that a partition (6) consisting of a gauze screen (6) or equivalent is provided separating the feeding reservoir (7) and the duct (4).
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: March 13, 2001
    Assignee: Georg Fischer Disa A/S
    Inventor: Uffe Andersen
  • Patent number: 5896912
    Abstract: A mold for gravity casting vehicle wheels having reusable thermally insulative linings attached to the interior of the gate and ball riser cavities. After filling the mold with molten metal, the gate cavity can be pressurized to assure that the mold cavity is completely filled. The ball riser cavity also can be pressurized subsequent to the gate cavity pressurization. The pressure on the gate and ball riser cavities forces molten metal from the cavities into the mold cavity as the metal cools and solidifies.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: April 27, 1999
    Assignee: Hayes Wheels International, Inc.
    Inventors: Brian K. Monroe, S. Joe Kingrey, Romulo A. Prieto, Bor-Liang Chen
  • Patent number: 5887646
    Abstract: A portable sand mold metal treating system having sand cope and sand drag portions, the treating system being attachable to a sand mold metal casting system.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: March 30, 1999
    Assignee: Ford Global Technologies, Inc.
    Inventors: Walter Evans, Leslie Terner, Frank Tibaudo
  • Patent number: 5690161
    Abstract: A filter for molten metal comprises a series of at least two refractory mineral material plates which define between them one or more cavities. The plates each comprise a series of holes through which the liquid metal passes and by which the liquid metal is filtered. At least one of the cavities contains a material for treating the metal, for example a material for inoculating the liquid metal. The filter is used among other things to filter and treat molten metals simultaneously and to improve the quality of the metal.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: November 25, 1997
    Assignee: Daussan et Compagnie
    Inventors: Jean-Charles Daussan, Gerard Daussan, Andre Daussan
  • Patent number: 5676731
    Abstract: An apparatus and method for filtering molten metal are disclosed. The apparatus utilizes a continuous filtering medium that is serially indexed into the metal filtering area. The apparatus may be used to filter ferrous and non-ferrous metals, and provides significant cost and time savings. In one embodiment the apparatus allows automatic indexing of a new filter for each shot or pour on high production casting machines. In another embodiment the apparatus is adapted to filter large amounts of metal up to 5,000 pounds or more.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: October 14, 1997
    Inventor: Jay Hitchings
  • Patent number: 5620044
    Abstract: A technique and accompanying apparatus to promote increased yield, improved surface finish and microstructure, and faster cycling time for precision-sand casting process. Aluminum products are cast by: (a) forming a precision sand mold, devoid of risers and/or vents, and a gating system consisting of a gravity feeding sprue and one or more runners effective to carry molten metal from the sprue only to the bottom of the mold cavity; (b) planting a flow modifier in the gating system between the sprue and mold effective to convert the flow into laminar quiescent flow; and (c) filling the gating system with molten aluminum metal at a rate faster than 4 pounds/second as permitted by the laminar flow that more rapidly fills the mold and acts as a heat sink to prevent a drop in temperature of the in-coming molten metal and thereby increase yield as well as minimizing cycle time.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: April 15, 1997
    Assignee: Ford Motor Company
    Inventors: Robert W. Grenkowitz, Michael J. Braskich, Allen D. Ackerman
  • Patent number: 5603373
    Abstract: A filter for molten metal comprises a series of at least two refractory mineral material plates which define between them one or more cavities. The plates each comprise a series of holes through which the liquid metal passes and by which the liquid metal is filtered. At least one of the cavities contains a material for treating the metal, for example a material for inoculating the liquid metal. The filter is used among other things to filter and treat molten metals simultaneously and to improve the quality of the metal.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: February 18, 1997
    Assignee: Daussan et Compagnie
    Inventors: Jean-Charles Daussan, Gerard Daussan, Andre Daussan
  • Patent number: 5556592
    Abstract: An apparatus and method for filtering molten metal are disclosed. The apparatus utilizes a continuous filtering medium that is serially indexed into the metal filtering area. The apparatus may be used to filter ferrous and non-ferrous metals, and provides significant cost and time savings. In one embodiment the apparatus allows automatic indexing of a new filter for each shot or pour on high production casting machines. In another embodiment the apparatus is adapted to filter large amounts of metal up to 5,000 pounds or more.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: September 17, 1996
    Inventor: Jay Hitchings
  • Patent number: 5503214
    Abstract: A casting mold assembly includes cope and drag sections having a casting cavity therebetween and a casting core supported within the cavity. A vertical down sprue extends through the cope section and joins a flow passage extending through the core in prolongation of the down sprue for introducing molten metal directly into the mold cavity to produce a disk brake rotor. A filter is supported in the flow path of the core and a flow control lip is provided at the exit of the flow path to provide a flow constricting gap between the annular lip and an underlying lower cavity wall to slow the flow of metal into the cavity.
    Type: Grant
    Filed: April 4, 1994
    Date of Patent: April 2, 1996
    Assignee: CMI International, Inc.
    Inventors: Donald L. Cribley, Thomas E. Prucha, Robert R. Fors
  • Patent number: 5425410
    Abstract: The sprue/riser sleeve 40 has a tubular, preferably cylindrical wall 42 extending between an inlet end 48 and an outlet end 50. The sleeve 40 has a woven mesh filter extending across a central passageway 51 with a periphery 54 of the filter 52 embedded into the wall 42. The periphery 54 has three or more, evenly spaced tabs 56 formed thereon that project further into or through the wall to secure the filter to the wall without materially weakening the wall. Preferably, the filter has a square-shaped periphery 54 with corners 64 that define the tabs 56. The main portion of the periphery extends into the wall less that one-half the thickness of the wall, whereas the tabs extend into the wall a distance greater than one-half the thickness.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: June 20, 1995
    Assignee: Pyrotek, Inc.
    Inventor: Mark W. Reynolds
  • Patent number: 5404930
    Abstract: An improved mold for use in casting a metal airfoil has an airfoil mold cavity and a starter chamber. A lower end of the starter chamber is formed by a chill plate. A filter is disposed in the starter chamber between the airfoil mold cavity and the chill plate. When an airfoil is to be cast, molten metal is conducted into the starter chamber, into passages in the filter and into the airfoil mold cavity. The molten metal is solidified upward in the starter chamber from the chill plate and through the passages in the filter. The filter blocks migration of impurities from the starter chamber to the airfoil mold cavity as the metal solidifies in the starter chamber. As the molten metal begins to solidify in the airfoil mold cavity, the molten metal is solidified as a large number of columnar grain crystals which extend from the passages in the filter into the airfoil mold cavity.
    Type: Grant
    Filed: January 6, 1994
    Date of Patent: April 11, 1995
    Assignee: PCC Airfoils, Inc.
    Inventors: Paul Stanton, Louis H. Monte
  • Patent number: 5390723
    Abstract: Metallurgically treated metal castings are produced using a consumable plug assembly made of a meltable material which is placed in a reaction chamber in an open treating basin and above a passage to a molding cavity. The consumable plug assembly has physical and chemical characteristics which maintain the plugged relationship for a preselected retaining period. All of a treating material is placed on the plug in the reaction chamber prior to metal pouring so as to react directly with the poured metal in a non-dynamic way.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: February 21, 1995
    Inventors: Prem P. Mohla, Eli David
  • Patent number: 5234047
    Abstract: A ceramic shell mould (70) for casting a single crystal turbine blade comprises a plurality of article portions, (72), each of which has an article chamber (74) for defining the shape of a turbine blade, a plurality of selector portions (76), a plurality of starter portions (80) and a runner portion (84). The runner portion (84) comprises a first subsection (86) which has a central axis (87) arranged parallel to, and spaced from, the central axes (73) of the article portions (72) and a plurality of second subsections (90) which interconnect the first subsection (86) with the article portions (72). The second subsections (90) are arranged to make an acute angle with the first subsection (86) of the runner portion (84) and with the starter portions (80) so that the second subsections (90) may bend to allow relative movement between the first subsection (86) and the starter portions (80) to prevent the cast turbine blades falling off the mould.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: August 10, 1993
    Assignee: Rolls-Royce PLC
    Inventor: Peter E. Rose
  • Patent number: 5104540
    Abstract: A molten metal filter is disclosed having a carbon or carbon-thermite coating that reduces thermal shock to the filter, and protects the filter from corrosion from the metal or components and impurities in the metal, and prevents metal from freezing in the filter. A molten metal assembly suitable for casting molten metal is disclosed which comprises a filter for molten metal and means for molten metal flow passage leading through the filter. The means have surfaces defining a molten metal path. The filter has a coating of carbon or carbon in intimate contact with a thermite material on the surface of the filter. A process is disclosed for filtering molten metal which comprises passing molten metal through the above described coated filter.
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: April 14, 1992
    Assignee: Corning Incorporated
    Inventors: J. Paul Day, Timothy V. Johnson, Ronald D. Quinn
  • Patent number: 5033531
    Abstract: Molten iron is cast into a mould through a filter located in the runner system of the mould using a filter comprising a body having a plurality of cells, at least some of the cells having their walls at least partially coated with a first layer of wax and a second layer of an inoculant, such as graphite, calcium silicide or ferrosilicon, for the iron.
    Type: Grant
    Filed: July 18, 1990
    Date of Patent: July 23, 1991
    Assignee: Foseco International Limited
    Inventors: Charles Fisher, Hugh Kind, James Devine, Michael J. Gough, Ian N. Delaney
  • Patent number: 4961460
    Abstract: A mould (61) for metal casting has a mould cavity (62) and a sprue (63) communicating directly with the mould cavity (62) and located in the sprue (63) a sleeve (64) of refractory material having a cellular ceramic filter (65) fixed therein. The mould, which has no running system apart from the sprue, may be a sand mould or a metal die for producing castings by gravity or low pressure diecasting. The cellular ceramic filter may be a honeycomb type of structure having cells which extend between two outer surfaces of the filter or a structure having interconnecting cells such as a ceramic foam.
    Type: Grant
    Filed: March 1, 1990
    Date of Patent: October 9, 1990
    Assignee: Foseco International Limited
    Inventors: David R. Butler, George Snow, Philip Sandford, Max G. Neu, Jean P. Villani, Alain Teyssedre, Roland Lenoir
  • Patent number: 4955427
    Abstract: A filter for molten metal with a particulate coating for simultaneously metallurgically treating and filtering is disclosed. A layer of particulates such as ferroalloy, deoxidizer, grain refiner, inoculant or master alloy is placed on the surface of a hard-fired ceramic or refractory cloth filter for treating liquid metal. The particles are held in place by a coating of carbonaceous resin which is applied to the surface of the filter and which also protects the filter and particles against abrasion and moisture. The placement of the particulate additives on the filter allows the molten metal to be metallurgically treated and filtered simultaneously.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: September 11, 1990
    Assignee: Amenex Associates, Inc.
    Inventor: Jay R. Hitchings
  • Patent number: 4928746
    Abstract: A mould (61) for metal casting has a mould cavity (62) and a sprue (63) communicating directly with the mould cavity (62) and located in the sprue (63) a sleeve (64) of refractory material having a cellular ceramic filter (65) fixed therein. The mould, which has no running system apart from the sprue, may be a sand mould or a metal die for producing castings by gravity or low pressure diecasting. The cellular ceramic filter may be a honeycomb type of structure having cells which extend between two outer surfaces of the filter or a structure having interconnecting cells such as a ceramic foam.
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: May 29, 1990
    Assignee: Foseco International Limited
    Inventors: David R. Butler, George Snow, Philip Sandford, Max G. Neu, Jean P. Villani, Alain Teyssedre, Roland Lenoir
  • Patent number: 4919188
    Abstract: A mould for the production of a nodular or compacted graphite iron casting has parts comprising a treatment sprue, a runner, a slag trap, a filter chamber having an ingate and an outlet and having located therein a ceramic filter having an inlet and outlet, a casting cavity ingate, and a casting cavity, and the parts of the mould have a relationship one with another such that F2=0.8 F1 to 1.2 F1, F3=30% F4 - 100% F4, F4.gtoreq.4.5 F1, F5.gtoreq.1.3 F1, F6=2 F5 to 4 F5, F7.gtoreq.F5 and .ltoreq.F6, F8.gtoreq.F5 and .ltoreq.F6, F9=1.2 F1 to 3 F1, F10.gtoreq.
    Type: Grant
    Filed: May 17, 1989
    Date of Patent: April 24, 1990
    Assignee: Foseco International Limited
    Inventors: Manfred Fessel, Gerd Trinkl
  • Patent number: 4913218
    Abstract: A casting mold having first and second casting mold halves is provided with a sprue system in the first casting mold half which comprises a sprue casting mold half which comprises a sprue cup for receiving molten metal and feeding same to a feeder provided with a filter which filters the molten metal prior to delivering same to a mold cavity provided in the second casting mold half.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: April 3, 1990
    Assignee: Georg Fischer AG
    Inventor: Karl Seidinger
  • Patent number: 4907640
    Abstract: A gravity poured foundry mold having a gating system and at least one complete mold casting cavity, the gating system allowing castings to be made in more compact molds, using less metal at lower temperature, obtaining less solidification strained castings, and requiring less fettling work and less pattern work. The gating system combines the use of a strainer such as a skin-strainer with any of several fluid restraining devices including but not limited to skin-strainer covers, restraining floating pieces, non-floating restraining pieces and blind floating pieces. Also disclosed are applications in which a skin-strainer is omitted. There is disclosed apparatus which may be standardized, thereby greatly increasing the ease, accuracy and confidence with which the gating system may be used in foundries which would have available to them sets of different sizes of standardized, interchangeable and prefabricated elements as disclosed herein.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: March 13, 1990
    Assignee: Marie-Therese Simian
    Inventor: Miquel J. Jeanneret
  • Patent number: 4865113
    Abstract: Apparatus for the vacuum-assisted, countergravity casting of thin-walled metal parts includes a plurality of expendable casting molds supported on a top side of a reusable drag slab. Each casting mold includes a mold cavity and a mold ingate passage extending from the mold cavity into registry with a respective underlying slab ingate passage that extends between the top side and a bottom side of the drag slab and that optionally includes a molten metal filter therein. When the bottom side of the drag slab is immersed in an underlying molten metal pool with the mold cavities evacuated, the molten metal is drawn upwardly through each slab ingate passage and the molten metal filter therein and then through each mold ingate passage registered therewith into each mold cavity. The molten metal filter in each slab ingate passage removes inclusion-forming impurities from the molten metal as it is drawn upwardly into each mold cavity.
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: September 12, 1989
    Assignee: General Motors Corporation
    Inventors: Karl D. Voss, James B. Mercer, Gary F. Ruff
  • Patent number: 4802527
    Abstract: Apparatus for casting molten metal including a mold for casting molten metal having a base portion, a molten metal inlet located at the base portion, a filter positioned across the molten metal inlet so that all the molten metal must pass therethrough and a well beneath said inlet and beneath said filter.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: February 7, 1989
    Assignee: Swiss Aluminum Ltd.
    Inventors: Jerry W. Brockmeyer, Michael A. Cummings
  • Patent number: 4798615
    Abstract: A filter for molten metal having a high melting point is in the form of a net woven of glass yarns formed by twisting a multiplicity of glass fibers together. The glass fibers contain at least 75 wt. % of SiO.sub.2 and are thermally cured at a thermal shrinkage of 2.5 to 15%. The thermal shrinkage is expressed by (l-l')/.times.100 % wherein l is the length of the fiber before the thermal cure, and l' is the length of the fiber as thermally cured.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: January 17, 1989
    Assignee: Kubota Ltd.
    Inventors: Shigemi Fukuta, Toshinari Amakasu, Ken Ugata, Shoichi Yoshino
  • Patent number: 4749022
    Abstract: A gravity poured foundry mold having a gating system and at least one complete mold casting cavity, the gating system allowing castings to be made in more compact molds, using less metal at lower temperature, obtaining less solidification strained castings, and requiring less fettling work and less pattern work. The gating system combines the use of a strainer such as a skin-strainer with any of several fluid restraining devices including but not limited to skin-strainer covers, restraining floating pieces, non-floating restraining pieces and blind floating pieces. Also disclosed are applications in which a skin-strainer is omitted. There is disclosed apparatus which may be standardized, thereby greatly increasing the ease, accuracy and confidence with which the gating system may be used in foundries which would have available to them sets of different sizes of standardized, interchangeable and prefabricated elements as disclosed herein.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: June 7, 1988
    Assignee: Marie-Therese Simian
    Inventor: Miguel J. Jeanneret
  • Patent number: 4721567
    Abstract: A ceramic pouring filter for use in the casting of molten metal comprises a number of closely spaced apertured elements defining filtering cavities there between with their apertures staggered so that the metal flowing out of the apertures of one element passes through a restriction before entering the apertures of the next element.
    Type: Grant
    Filed: June 6, 1984
    Date of Patent: January 26, 1988
    Assignee: Certech Inc.
    Inventor: Stuart Z. Uram
  • Patent number: 4690196
    Abstract: A mould for use in the casting of molten ferrous metal is described comprising a mould cavity and a runner system comprising a sprue, a sprue well and a runner, and having located in the runner a ceramic filter having an open-cell foam structure. A sealed plastics container containing particles of a treatment agent, such as an inoculant for the molten ferrous metal is located in a chamber in the runner system on that side of the filter which is further from the mould cavity such that part of the container is in the sprue well.
    Type: Grant
    Filed: February 18, 1987
    Date of Patent: September 1, 1987
    Assignee: Foseco International Limited
    Inventor: Pierre Vernay