Means For Shaping Core (e.g., Core Boxes, Core Molds, Etc.) Patents (Class 164/228)
  • Patent number: 8794297
    Abstract: A molding apparatus is provided. The molding apparatus includes a first block configured to receive a moldable article therein, a second block positioned a distance from the first block, and a shim including graphite. The shim is positioned between the first block and the second block, wherein the shim gradually disintegrates when heated such that the second block contacts the first block.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: August 5, 2014
    Assignee: General Electric Company
    Inventors: Thomas Francis McNulty, John Kost, Xi Yang
  • Publication number: 20140202650
    Abstract: A composite core for forming a passage in an investment casting mold is provided including a generally hollow structural element. The structural element is configured to deform when a force is applied to an end thereof. A rigid shell element is formed about the structural element. The shell element extends beyond both an interior surface and an exterior surface of the structural element. The shell element is configured to shatter when the structural element deforms.
    Type: Application
    Filed: January 23, 2013
    Publication date: July 24, 2014
    Applicant: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Shihong G. Song, James S. Giampapa, John H. Meeson, JR.
  • Patent number: 8708029
    Abstract: An injection mold producing a model of a turbine engine blade, including: a top surface that folds onto a bottom surface, both surfaces including long rods for supporting a core generating cooling cavities inside the blade, wherein the long rods of the bottom surface are configured to contact a first surface of the airfoil at bearing points, and the long rods of the top surface are configured to contact a second surface of the airfoil at clamping points; at least one short rod extending from one of the surfaces of the mold and pointing towards a false point located on one of the surfaces of the airfoil, the length of the short rod being shorter than the distance between the surface of the mold and the surface of the blade at the false point, and the difference between the length and the distance being equal to tolerance in relation to positioning of the false point in event of deformation of the core.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: April 29, 2014
    Assignee: SNECMA
    Inventors: Patrick Pourfilet, Daniel Quach, Jean-Louis Martial Verger
  • Publication number: 20140034263
    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.
    Type: Application
    Filed: October 1, 2013
    Publication date: February 6, 2014
    Applicant: Columbus Steel Castings Company
    Inventors: Steven R. Pinkstock, Craig A. Holman, Ronald A. Poe
  • Patent number: 8567479
    Abstract: The present invention concerns equipment (1) for making foundry cores comprising a mold (2) provided with one or more core forms (3) and one or more channels (4, 6, 7) for conveying core formation material to the core forms (3). The equipment comprises one or more inserts (10) housed or able to be housed in the conveying channels (4, 6, 7) near to the core forms (3).
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: October 29, 2013
    Assignee: Freni Brembo S.p.A.
    Inventors: Giovanni Sana, Oscar Rota, Michele Nessi
  • Publication number: 20130160962
    Abstract: A main body core box assembly for creating coupler head cores which are attachable to various shank cores includes a main body core box including two halves, each half including a pattern configured to form the outer walls of a first head core having a first shank core. A plug is insertable into an end of respective patterns to form a second, alternative head core having a first half of a connection joint attachable to a second shank core that includes a second half of the connection joint, the second shank core being different than the first shank core. The first half of the connection joint may be a male connector, where the plug includes a recess having an angled surface to create a notch on the male connector. The second half of the connection joint may be a female connector with a raised surface corresponding to the notch.
    Type: Application
    Filed: December 27, 2011
    Publication date: June 27, 2013
    Applicant: Bedloe Industries LLC
    Inventors: F. Andrew Nibouar, Jerry R. Smerecky, Noland Brooks, Nick Salamasick
  • Publication number: 20120291980
    Abstract: A system for creating an interlock feature between two related railcar coupler cores comprises a first half of a corebox defining cavity for forming a first half of a railcar coupler core, a second half of a corebox defining a cavity for forming second half of a railcar coupler core, and a loose piece loose piece including an extension on a first side shaped to fit in the cavities.
    Type: Application
    Filed: May 20, 2011
    Publication date: November 22, 2012
    Inventors: F. Andrew Nibouar, Jerry R. Smerecky, Kelly Day, Vaughn Makary, Nick Salamasick
  • Publication number: 20120241119
    Abstract: The present invention concerns equipment (1) for making foundry cores comprising a mould (2) provided with one or more core forms (3) and one or more channels (4, 6, 7) for conveying core formation material to the core forms (3). The equipment comprises one or more inserts (10) housed or able to be housed in the conveying channels (4, 6, 7) near to the core forms (3).
    Type: Application
    Filed: May 18, 2010
    Publication date: September 27, 2012
    Inventors: Giovanni Sana, Oscar Rota, Michele Nessi
  • Patent number: 8151861
    Abstract: A one-piece core-making technique used in producing railway truck bolsters and side frames, which includes the following steps: 1. After scraping the top of a core box, applying a shaped top mould (11), which is precisely located, from top to bottom. 2. Press or slightly hit the top mould (11) to make sure the top mould covers/caps the scraping surface. 3. Keep pressing to make sure that the flat scraping surface was pressed to a required curved shape, like the shape of the top mould (11). 4. Last, it will become a one-piece core with a partially integrated inner cavity section. The one-piece core made by this technique has a smooth surface. This technique also can improve the internal quality of the product and ease work intensity.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: April 10, 2012
    Assignee: CSR Meishan Rolling Stock Co., Ltd.
    Inventors: Yundong Wang, Wuyi Xu, Zhu Li, Xiaoming Yang, Youping Liu, Zhicheng Wang, Chengyong Liu, Minggao Qing, Yonghong Yuan
  • Publication number: 20110094698
    Abstract: A ceramic core is produced by introducing a fluid ceramic core material, such as a ceramic slurry, into a core-shaped cavity formed at least in part by one or more fugitive core tooling liners residing in a back-up body, removing the ceramic core from the cavity, and removing the one or more fugitive tooling liners from the back-up die body and discarding them. The fugitive tooling liners and optional tooling inserts are used in one or more production cycles (e.g. ceramic slurry injection cycle) to make a single or multiple ceramic cores and then replaced with fresh (un-used) tooling liners and optional inserts to make other ceramic cores.
    Type: Application
    Filed: October 28, 2009
    Publication date: April 28, 2011
    Inventor: Robert E. Grunstra
  • Patent number: 7931459
    Abstract: A tool for manufacturing a casting core, for a turbomachine blade with a leading edge and a trailing edge, the core includes a thick part on the leading edge side and a thin part on the trailing edge side is disclosed. The tool includes first and second dies of the core that are moveable in a direction with respect to each other between a molding position and a demolding position, sub-components that are moveable relative to the dies, and mechanical ejectors that are provided on the first and second dies. The parts of the dies corresponding to the thin part of the core do not include a movable sub-component. The thin part of the core is demolded along the main direction of opening of the first and second dies.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: April 26, 2011
    Assignee: SNECMA
    Inventors: Yvon Louesdon, Serge Prigent, Jean-Louis Martial Verger
  • Publication number: 20110036528
    Abstract: A process for producing a mold includes introducing a composition including a particulate, refractory material and a binder into a hollow model having an interior cavity which determines contours of all surfaces of the mold or a mold part, wherein the model includes at least two separate parts to permit removal of the mold, and applying a second composition containing at least one organosilicon component and at least one solvent to at least one of the separable parts before use.
    Type: Application
    Filed: December 19, 2008
    Publication date: February 17, 2011
    Applicants: ITN NANOVATION AG, ASHLAND-SUEDCHEMIE-KERNFEST GMBH
    Inventors: Christian Goebbert, Michael Hanisch, Volker Hofmann, Frank Meyer, Ralph Nonninger, Henning Rehse, Magnus Jundt, Christian Priebe, Gunther Schaffer
  • Publication number: 20100236746
    Abstract: The invention relates to a casting tool for the production of castings, particularly cores for sand castings, pressure die-castings, and gravity diecastings, comprising a first casting tool unit (2) including a first casting mold half (22) having a first mold recess (24) the contour (22b) of which at least partly defines the shape of the casting, an ejecting assembly (6) disposed on that side of the first casting mold half (22) which faces away from the first mold recess (24) and capable of movement in the direction of a Z-axis relatively to the first casting tool unit (2) and having at least one ejecting rod (62) which can extend through an access bore (22a) into the first mold recess (24) in the first casting mold half (22), wherein an entrainer unit (76) is attached to the ejecting assembly (6), to which entrainer a contact surface (30a) provided on the first casting tool unit (2) is assigned for contacting the entrainer (76), wherein the entrainer (76) and the contact surface (30a) jointly define the maxi
    Type: Application
    Filed: November 4, 2009
    Publication date: September 23, 2010
    Inventor: Ivo Herzog
  • Publication number: 20100122790
    Abstract: The invention relates to a casting tool for the production of castings, particularly for the production of cores (90) for sand castings, comprising a supporting device consisting of a first and a second supporting unit (10, 20, 50, 60) capable of being moved in a joining direction (2) toward each other, and comprising at least two mold elements (30, 40), of which a first mold element (30) is attached to the first supporting unit (10, 20) and a second mold element (40) is secured to the second supporting unit (50, 60), which mold elements (30, 40) each have a mold recess (33, 43), which mold recesses (33, 43) in the mold elements (30, 40) together define the shape of at least one casting core to be produced (90) when the first and second mold elements (30, 40) bear against each other.
    Type: Application
    Filed: November 4, 2009
    Publication date: May 20, 2010
    Inventor: Ivo Herzog
  • Publication number: 20080277089
    Abstract: To produce moulds or cores for foundry purposes from a mixture (M) of moulding material or sand and a binder, the mixture (M) is shot using a shooting unit (2) or from a shooting tube (3) and a shooting head (4) through at least one discharge opening (7) arranged on a shooting plate (5) into a moulding or core tool (8). The region of the discharge opening (7) is moistened and/or kept moist by a liquid between at least two shooting operations, where the liquid (15) used for moistening is atomized by at least one ultrasonic atomizer (16) to form an aerosol capable of suspension and is fed to the discharge opening (7) directly or indirectly, for example, via one or more lines (18, 23).
    Type: Application
    Filed: September 21, 2006
    Publication date: November 13, 2008
    Applicant: LAEMPE & MOSSNER GMBH
    Inventor: Joachim Laempe
  • Patent number: 7228947
    Abstract: The invention relates to a method and tools for producing a braking band (2) of a disk-brake disk (1) by casting, in which the disk comprises at least two plates (3, 3?) connected to one another by connecting elements (4) forming an internal air-duct (7) for the cooling of the braking band (2). With the method and the tools, a disk is produced in which at least one of the plates (3, 3?) has, in its surface (8, 8?) defining the air-ducts (7), at least one groove (10, 10?) having a cross-section which becomes wider towards the air-duct.
    Type: Grant
    Filed: May 28, 2001
    Date of Patent: June 12, 2007
    Assignee: Freni Brembo S.p.A.
    Inventors: Giuseppe Meroni, Simone Ravasio, Leone Oberti
  • Patent number: 6923240
    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.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: August 2, 2005
    Assignee: Fata Aluminium S.p.A.
    Inventor: Bartolomeo Tosco
  • Publication number: 20040177941
    Abstract: A method for producing sand cores for foundry, comprising the operations of: defining a moulding cavity; blowing in a mixture of sand and hydrated binder into said moulding cavity so as to produce a mass of sand, which reproduces in a complementary way the shape of said moulding 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.
    Type: Application
    Filed: March 12, 2004
    Publication date: September 16, 2004
    Applicant: Fata Aluminium S.p.A
    Inventor: Bartolomeo Tosco
  • Publication number: 20040163793
    Abstract: A machine for production of cores for use in castings includes a platform for supporting two core boxes and a split filler head having dual discharge channels for simultaneously injecting core sand into two core boxes and for simultaneously applying curing gas to core sand injected the two into core boxes.
    Type: Application
    Filed: February 21, 2003
    Publication date: August 26, 2004
    Inventors: Kenneth D. McKibben, Alan Gould, Daniel D. Minor
  • Publication number: 20040031581
    Abstract: The present invention relates to a method and apparatus for making a sand core (112) utilizing purge air through a core box (100 and 100′) to harden the binder in the sand core (112) proximate the ejection pins (106 and 106′). The sand core (112) may be removed from the core box (100 and 100′) prior to drying the binder completely thereby resulting in an improved production rate of the sand core (112).
    Type: Application
    Filed: August 19, 2003
    Publication date: February 19, 2004
    Inventors: Richard M. Herreid, Yuliy M. Yunovich, Jeremy D. Eastman
  • Publication number: 20030173049
    Abstract: The present invention relates to a method and apparatus for making a sand mold (112) utilizing reverse purge air through a core box (100 and 100′) to harden the binder in the sand mold (112) proximate the ejection pins (106 and 106′). The sand mold (112) may be removed from the core box (100 and 100′) prior to drying the binder completely.
    Type: Application
    Filed: March 18, 2002
    Publication date: September 18, 2003
    Inventors: Richard M. Herreid, Yuliy M. Yunovich, Jeremy D. Eastman
  • Patent number: 6588484
    Abstract: A method of making a ceramic core is provided wherein the ceramic core is grit blasted using abrasive grit media particulates directed at the core through a preformed apertured mask or pattern to impart a controlled pattern of surface concavities to the core surface by impingement of the abrasive grit media thereon. Another method of making a ceramic casting core is provided wherein the ceramic core is formed in a molding die having a fugitive textured mask or a permanent textured insert positioned on the die surface to impart a controlled surface texture or roughness to the core surfaces.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: July 8, 2003
    Assignee: Howmet Research Corporation
    Inventors: Ken Ervin Fosaaen, Rodney S. Haaland
  • Patent number: 6520244
    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.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: February 18, 2003
    Assignee: Ford Global Technologies, Inc.
    Inventors: James R. Lapeus, Michael John Braskich, Mark John Gallo, Robert W. Grenkowitz, Stephen A. Veresh
  • Publication number: 20030015308
    Abstract: Method and apparatus for making a ceramic core or fugitive pattern for use in investment casting wherein a fluid ceramic core or pattern material is introduced into a molding cavity defined by cooperating dies, and at least a region of one or both of the dies is heated during filling of the molding cavity with the material and then cooled to a lower ejection temperature before removal of a ceramic core or pattern from the molding cavity.
    Type: Application
    Filed: July 23, 2001
    Publication date: January 23, 2003
    Inventors: Ken E. Fosaaen, Jeffery S. Smith, David R. Erny, Robert M. Shay, Nick G. Lirones
  • Publication number: 20030010469
    Abstract: The invention relates to a device for casting a workpiece, especially a turbine blade with inner cooling, comprising a casting cavity (1) in which casting cores (2) which produce channels (3) that pass through the workpiece are provided. The aim of the invention is to improve a device of this type in such a way that there are no poorly cooled areas present in the workpiece. To this end, the casting cores (2) are placed in the casting cavity (1) in such a way that they rest against each other loosely.
    Type: Application
    Filed: August 23, 2002
    Publication date: January 16, 2003
    Inventor: Peter Tiemann
  • Publication number: 20020185242
    Abstract: An engine block mold package includes a barrel crankcase core having a plurality of barrels on an integral crankcase region and one or more locator surfaces on the crankcase region. The barrels are formed by a barrel-forming tool element of a core box. The barrel-forming tool element is configured to also form the locator surface(s) on the crankcase region such that the locator surface(s) is/are accurately positioned relative to the barrels and thus the cylinders formed in the engine block cast in the mold package. The locator surface(s) can be used to locate the engine block casting in subsequent aligning and machining operations without the need to reference a curved surface of a cylinder bore liner.
    Type: Application
    Filed: June 11, 2001
    Publication date: December 12, 2002
    Inventors: Thomas P. Newcomb, Larry R. Shade, Douglas P. Leu
  • Publication number: 20020129915
    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.
    Type: Application
    Filed: March 14, 2001
    Publication date: September 19, 2002
    Inventors: James R. Lapeus, Michael John Braskich, Mark John Gallo, Robert W. Grenkowitz, Stephen A. Veresh
  • Publication number: 20020100575
    Abstract: A method for the production of a cast article having a small hole comprises the steps of setting a linear core member in a cavity of a metal mold, injecting a molten metal into the cavity, and drawing out the core member from the resultant cast product to form a small hole. A linear core member having a surface film formed by surface coating or by subjecting to a surface treatment is used so that the surface film is partly or as a whole peeled off the linear core member upon drawing it from the cast product, thereby enabling the core member to be drawn from the inside of the cast product. Alternatively, the linear core member is so constructed as to elastically deform in the drawing direction upon drawing it from the cast product to have a diameter smaller than the original diameter.
    Type: Application
    Filed: March 12, 2002
    Publication date: August 1, 2002
    Applicant: YKK Corporation
    Inventors: Tadashi Yamaguchi, Masaki Sato, Hidenobu Nagahama
  • Publication number: 20020029862
    Abstract: 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 water contained in the mixture is withdrawn by a physical method and d) the core preform is taken out of the core box. The process is characterized by the fact that e) the heated core box is subjected to a depression during filling f) the temperature/dwell time is adjusted after the closing of the core box so that a dimensionally stable and good bearing shell is formed on the edge of the preform g) the preform is immediately removed after opening of the core box and, under the effect of microwaves, is subjected to a complete drying.
    Type: Application
    Filed: May 25, 2001
    Publication date: March 14, 2002
    Applicant: VAW motor GmbH
    Inventor: Thomas Steinhauser
  • Patent number: 6286582
    Abstract: A process for the manufacture of a thin ceramic core involves casting a band of uniform thickness on a support from a solution of a ceramic material based on silica and zircon in a binder, drying the band, shaping the band in a mold and carrying out preheating and pressing of the band in the mold, baking the component thus obtained in a ceramic preform, and then carrying out an impregnation. The thin core obtained can be assembled together with another thin core and/or on a conventional thick central core, and can be used in precision casting such as in the production of turbine blades.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: September 11, 2001
    Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation “SNECMA”
    Inventors: Thierry Jean Emile Chartier, Vincent Louis Christian David, Mischaël François Louis Derrien, Eric Jean Eberschveiller, Franck Edmond Maurice Truelle, Isabelle Marie Monique Valente
  • Patent number: 6003588
    Abstract: A process for inserting cores into a casting mold includes inserting a plurality of individual cores into a template; forming a core group by joining together the plurality of individual cores within the template using a bracing and securing device which is detachable; dipping the core group into a founder's black bath to provide a coated core group; drying the coated core group; inserting the core group after drying into the casting mold; and removing the bracing and securing device. The process advantageously additionally includes providing a plurality of core groups that form a core assembly for a casting mold; forming a core set by joining together the plurality of core groups using a bracing and securing device; dipping the core set into a founder's black bath to provide a coated core set; drying the coated core set; inserting the core set after drying into the casting mold; and removing the bracing and securing device.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: December 21, 1999
    Assignee: Eisenwerk Bruehl GmbH
    Inventors: Quy Dung Dang, Gerd Pawera, Juergen Achenbach
  • Patent number: 5911267
    Abstract: A cope for a core box has a passage for passing sand into a core box cavity and a bore for passing catalyst into the core box cavity to harden a sand core formed therein. The bore may extend from an exterior surface of the cope to the cope passage. The cope may have structure for forming a seal with a sand injection tube following sand injection, such as a blow-up seal or an O-ring. A method of producing cores in a core box includes the step of providing a cope, a drag, and a cavity formed therebetween, the cope having a passage for receiving an injection tube and a bore for passing catalyst. Further steps include using the injection tube to inject sand through the cope passage into the cavity and passing catalyst through the bore in the cope into the cavity. A seal may be formed between the cope and the injection tube after sand injection.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: June 15, 1999
    Assignee: Georg Fischer Disa, Inc.
    Inventors: Raymond F. Witte, Pheroze J. Nagarwalla, Scott S. Hendrie, Paul M. Korzenecki
  • Patent number: 5785107
    Abstract: A core box assembly for molding cores includes a first core box and a second core box disposed above the first core box. Each of the core boxes has a cavity. A passage for delivering core material to the cavities in the core boxes extends through the second core box and into the first core box. The second core box is placed above the first core box and core material is injected into the core boxes.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: July 28, 1998
    Assignee: Georg Fischer Disa, Inc.
    Inventors: Pheroze J. Nagarwalla, Scott Hendrie, Raymond F. Witte
  • Patent number: 5715885
    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.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: February 10, 1998
    Assignee: Georg Fischer Disa, Inc.
    Inventors: Pheroze J. Nagarwalla, Raymond F. Witte
  • Patent number: 5673743
    Abstract: A process of core molding is disclosed, which permits increasing the positioning accuracy of a base core and a bonded core relative to each other and also avoids handling the first molded base core outside the die to preclude such trouble as breakage of the common die. By the process, a complete core is obtained, which comprises a base core and a bonded core positioned in and bonded to the base core. The base core is molded in a molding space which is defined by engaging a die element and a common die with each other. After removing the die element from the common die while leaving the molded base core in the common die, a different die element is engaged with the common die to define a different molding space for molding a bonded core. The bonded core is bonded to the base core as it is molded.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: October 7, 1997
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroaki Kawamoto, Hidekazu Ito, Yuji Nishiyama, Masamitsu Kenmochi, Sadao Kitazawa, Makoto Iwata
  • Patent number: 5522447
    Abstract: A method and apparatus for fabricating a core within a core box 10 having passages and screens 12 through which an air-sand mixture may flow to occupy cavities within the core box 10 by which the core is shaped. The method comprises providing a plurality of pressure switch sensors 14 disposed upon a core replica 16, each sensor being located in communication with a screen 12 within the core box 10; positioning the replica 16 within the core box 10; monitoring a condition at one or more screens 12 to determine a state of accretion thereat and generating a signal indicative of the condition; sending the signal to a processor which is in operative communication with a means for cleaning; and activating the means for cleaning within the core box 10 in response to the signal so that flow impediments are cleared from the screens 12 and so that constrictions in fluid flow within the core box 10 are detected in their early stages of development and acceptable production rates may be maintained.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: June 4, 1996
    Assignee: Ford Motor Company
    Inventors: Donald E. Sandstrom, Richard S. Lipka, Thomas A. Grams
  • Patent number: 5368087
    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.
    Type: Grant
    Filed: December 27, 1993
    Date of Patent: November 29, 1994
    Assignee: Ford Motor Company
    Inventors: William J. Rinz, Tirlochan S. Sandhu
  • Patent number: 5201811
    Abstract: A method and apparatus for the manufacturing in one operation of a complex core, such as a core for manufacturing a double-volute turbo-charger housing. The apparatus includes two separable core box halves and a segmented mandrel removably disposed between the two separable core box halves. The mandrel has two removable segments which allow for the removal of a completed core.
    Type: Grant
    Filed: January 28, 1992
    Date of Patent: April 13, 1993
    Assignee: The Hamilton Foundry & Machine Co.
    Inventors: Donald R. Lebold, Christopher J. Lichtle
  • Patent number: 5190094
    Abstract: A gas-permeable form tool for manufacturing casting and core moulds from hardenable moulding sand includes a heteroporous, open-pore material. The wall of the tool contains a first fine-pore layer region adjacent to the moulding sand with a thickness of about 0.2-2 mm and a material density of about 75% to 95% of theoretical specific density and a pore diameter of about 50 .mu.m. The first fine-pore layer comes in contact with a second, large-pore supporting skeleton having a theoretical material density of less than 80% of theoretical specific density and a median pore diameter of more than 100 .mu.m.
    Type: Grant
    Filed: August 9, 1989
    Date of Patent: March 2, 1993
    Assignee: Sinterstahl GmbH
    Inventor: Walter Knoess
  • Patent number: 5095967
    Abstract: An improved core making machine having a frame and capable of producing cores at a molding position within the frame is easily configured to include one or more horizontal core box handling components and/or one or more vertical core box handling components. The machine is readily adaptable to many different foundry needs.
    Type: Grant
    Filed: January 9, 1991
    Date of Patent: March 17, 1992
    Assignee: Disamatic, Inc.
    Inventors: Pheroze J. Nagarwalla, Clyde Eicher, Raymond F. Witte
  • Patent number: 5072775
    Abstract: A foundry core blowing machine includes an upright frame with a blow head for a sand-resin mix fixed at the top. Sectionalized vertically movable rods extend through bushings at the top and bottom of the frame. Fixed to the rods are a cope support and a secondary table. The secondary table supports the cylinder of a cope-drag clamp piston-cylinder assembly with the rod of such assembly being connected to a primary table thereabove which slidably moves on the rods. The secondary table and the rods secured thereto are elevated independently of the cope-drag clamp so that the clamped cope and drag may be elevated to be clamped against the blow head, lowered for interposition of a gassing head, and reclamped for cure, all while the cope and drag remain firmly clamped together. Only after curing are the cope and drag unclamped for lowering, stripping and removal of the core from the machine.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: December 17, 1991
    Assignee: Equipment Merchants International, Inc.
    Inventors: Roger W. Hale, Gerald B. Senk, Jr.
  • Patent number: 5056582
    Abstract: A core box shuttle system includes a shuttle car movable along a path, a movable shaft, a guiding surface carried by the shuttle car having a longitudinal extent transverse to the path and a slip-type connection between the movable shaft and the guiding surface whereby movement of the movable shaft is converted by the slip-type connection into movement of the shuttle car along the path.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: October 15, 1991
    Assignee: Disamatic, Inc.
    Inventors: Raymond F. Witte, Clyde Eicher, Donald F. Moonert, Pheroze J. Nagarwalla
  • Patent number: 4977944
    Abstract: In a core blowing machine, a core collecting device including a plurality of core collecting trays is provided, which is positioned at a core removal area of the machine and comprises a support bed on which a first set of guides is provided for guiding a carriage in a longitudinal direction thereof. A frame common for all core collecting trays is integrally connected to the carriage. The frame has a second set of guides which are transversal to the first set. A slide block is positioned on each pair of transversal guides and a tilting support holding the corresponding tray is fitted on each slide block. A tilting cylinder is provided for each tray, which is connected between the slide block and the support.
    Type: Grant
    Filed: February 7, 1989
    Date of Patent: December 18, 1990
    Inventor: Agustin A. Erana
  • Patent number: 4942916
    Abstract: A foundry core blowing machine includes an upright frame with a blow head for a sand-resin mix fixed at the top. Sectionalized vertically movable rods extend through bushings at the top and bottom of the frame. Fixed to the rods are a cope support and a secondary table. The secondary table supports the cylinder of a cope-drag clamp piston-cylinder assembly with the rod of such assembly being connected to a primary table thereabove which slidably moves on the rods. The secondary table and the rods secured thereto are elevated independently of the cope-drag clamp so that the clamped cope and drag may be elevated to be clamped against the blow head, lowered for interposition of a cure head, and reclamped for cure, all while the cope and drag remain firmly clamped together. Only after curing are the cope and drag unclamped for lowering, stripping and removal of the core from the machine.
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: July 24, 1990
    Assignee: Equipment Merchants International
    Inventors: Roger W. Hale, Gerald B. Senk, Jr.
  • Patent number: 4899802
    Abstract: The system includes two platforms vertically movable along guides provided on a fixed support. A top platform is swingable between a horizontal position in which it superposes a lower platform, and a vertical position. A blowing plate is positioned on the top platform. The system is provided with a double catch which is selectively engageable with the bottom wall of the top platform when the latter is in the horizontal position, and with the fixed support when the top platform is in the pivoted-away position.
    Type: Grant
    Filed: March 1, 1989
    Date of Patent: February 13, 1990
    Inventor: Agustin A. Erana
  • Patent number: 4844141
    Abstract: A core machine is arranged to automatically refine the shape of a sand core upon removal of the core from the machine. The core machine uses a core box to form a core. After formation of the core and separation of the core box halves a shaping member is moved into a space between the core box halves. As the core is ejected from the core box and removed from the machine it passes through the shaping member which refines the shape of the core. The machine may also be used for dimensional tolerancing about the parting line of the core box.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: July 4, 1989
    Assignee: Deere & Company
    Inventors: David V. Trumbauer, Alan E. Seeley
  • Patent number: 4830082
    Abstract: A machine and method for making molds and mold 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 mold cavity of the mold 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 mold cavity and introduces a catalyst gas into the cavity for curing the molding material. A system for removing the spent gas from the mold 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).
    Type: Grant
    Filed: December 3, 1986
    Date of Patent: May 16, 1989
    Assignee: Roberts Corporation
    Inventors: Kenneth E. Bellis, Jackson E. Brown, Pheroze J. Nagarwalla
  • Patent number: 4809763
    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.
    Type: Grant
    Filed: February 3, 1988
    Date of Patent: March 7, 1989
    Assignee: Eisenwerk Bruhl GmbH
    Inventor: Herbert Schilling
  • Patent number: 4794976
    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.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: January 3, 1989
    Inventor: Guido Peterle
  • Patent number: 4787435
    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.
    Type: Grant
    Filed: March 20, 1984
    Date of Patent: November 29, 1988
    Assignee: FMC Corporation
    Inventor: John J. Uppgren