Patents Examined by J. Reed Batten, Jr.
  • Patent number: 6050323
    Abstract: The castings are cast in several casting slices. The casting slices of a casting are cast, staggered timewise in succession using the same method and from the same alloy but in different casting molds or different parts of a casting mold. At the seams, the casting slices are cast together along a defined shapewise contour. The casting slices can be cast together indirectly with interposition of a separate seam strip. However, they can also be cast onto one another, with an already cast first casting slice being placed in a second casting mold and cast together therein with the second casting slice. Complete body side wall parts are cast in three casting slices, with the seams being located in the roof and sill areas.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: April 18, 2000
    Assignee: DaimlerChrylser AG
    Inventors: Guido Soell, Wolfgang Fussnegger
  • Patent number: 6050324
    Abstract: The mold comprises a tubular metal component (4), made of copper or a copper alloy, cooled by water circulation against its external wall and intended to ensure that the cast metal undergoes peripheral solidification on contact with its internal wall, and an uncooled feed head (9) made of a thermally insulating refractory, intended to contain cast metal in the liquid state and sitting on top of the cooled metal component (4) and defining with it a continuous sizing passage for the cast metal. A horizontal metal annulus (16) cooled by internal circulation is added between the feed head (9) and the tubular component (4) and aligned with the internal wall of the latter.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: April 18, 2000
    Assignees: Societe Anonyme des Forges Et Aciers de Dilling, Ugine Savoie, Ascometal, Sogepass, Sollac, Centre de Recherches Metallurgique
    Inventors: Jean-Marc Jolivet, Eric Perrin, Jacques Spiquel
  • Patent number: 6044895
    Abstract: A continuous casting and rolling system for steel strips includes a vertically working two-roll casting device, a first device for adding molten steel to the casting device, a second device for guiding a cast strip produced by the casting device into a horizontal position, a horizontally working rolling mill for working the cast strip, and a reel device receiving the strip worked in the horizontally working rolling mill. Each of the casting device, the first device, the second device, the horizontally working rolling mill and the reel device are controlled by respective individual closed-loop control systems. The system also includes a central control system connected to the first device, the casting device, the second device, the rolling mill and the reel device for an integrated adjustment of the respective individual closed-loop control systems as a function of mathematical models.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: April 4, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventors: Werner Kuttner, Friedemann Schmid, Hannes Schulze Horn, Kurt Hohendahl, Thomas Berger, Immo Domnig
  • Patent number: 6044894
    Abstract: A method for preparing a light metal or light metal alloy composite product, wherein (a) an aqueous slurry containing water, a reinforcement powder, a metal powder and an alumina sol binder is prepared; (b) a preform is prepared from the slurry; (c) the preform is sintered; and (d) the sintered preform is impregnated with a melt of a light metal or a light metal alloy to produce a light metal or a light metal alloy based composite product.
    Type: Grant
    Filed: February 22, 1996
    Date of Patent: April 4, 2000
    Assignee: Mazda Motor Corporation
    Inventors: Makoto Fujita, Kazuo Sakamoto, Yukihiro Sugimoto, Yukio Yamamoto
  • Patent number: 6041848
    Abstract: A continuous casting mold assembly has four mold walls in the form of discrete plates. The mold walls are arranged with an edge face of each wall abutting a major face of an adjacent mold wall. To permit changes in taper, each of the mold walls is mounted for pivotal movement on two orthogonal axes. The mold walls are held together by springs which can be hydraulically relieved when the mold walls are to be adjusted. The mold walls tend to move away from one another following hydraulic relief of the springs, and such movements are limited by screws associated with the respective mold walls. The screws contact abutments when the mold walls have moved apart by distances large enough to allow pivoting of the walls but not large enough to permit molten material to leak between the walls.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: March 28, 2000
    Assignee: SMS Concast Division of SMS-Schloemann Siemag Inc.
    Inventor: Carl Langner
  • Patent number: 6035923
    Abstract: A porous composite forming material is held in a cavity of a casting mold, and molten light alloy is poured into the cavity of the casting mold through a gate. Then a gas pressure is applied to the cavity in the casting mold with the cavity closed, thereby impregnating the pores of the porous composite forming material with the molten light alloy and forming a composite portion formed of a composite material of the light alloy and the composite forming material.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: March 14, 2000
    Assignee: Mazda Motor Corporation
    Inventors: Nobuyuki Oda, Yukihiro Sugimoto, Kazuo Sakamoto
  • Patent number: 6024161
    Abstract: A billet continuous casting machine comprises, a jacket for cooling an outer wall of a quadrangular tubular mold with cooling water, electromagnetic brakes disposed outside the mold and decelerating the flow of poured molten metal in the mold, an X ray-based level sensor for detecting the level of molten metal in the mold, notched portions formed at the corners of a quadrangular lower part of the mold, spray nozzles for spraying a cooling liquid directly onto the notched portions, and elastically pushing unit for imparting a pushing force corresponding to the static pressure of the molten metal to unnotched portions of the quadrangular lower part of the mold to push the unnotched portions inwardly of the mold, whereby molten metal is continuously poured into the cooled mold to solidify the molten metal so that a cast piece quadrangular in cross section is continuously produced. Delay in solidification at sites near the corners of the cast piece is eliminated, and high quality, high speed casting is realized.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: February 15, 2000
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hironori Fujioka, Hiroshi Nakajima, Masahiro Kassai
  • Patent number: 6024162
    Abstract: To provide a continuous casting method for a billet capable of stable casting without causing rhomboidity or side periphery deformation in the billet produced by continuous casting, in a casting mold used for this method, recess portions each comprising one or a plurality of transverse grooves or a large number of dimples are disposed below the lowermost position of a meniscus under a steady operation state within a distance of 200 mm on the inner peripheral surface of the casting mold so that a solidified shell is gradually cooled and the cooling capacity of each inner surface of the casting mold is substantially uniform.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: February 15, 2000
    Assignee: Nippon Steel Corporation
    Inventors: Masatsugu Uehara, Toshiki Sato, Teruo Fujinaga, Kazutoki Nakao
  • Patent number: 6024158
    Abstract: Parts are diecast from a light metal alloy which in the molten state is fed under gravity into a casting chamber of a diecasting machine and whence forced by a plunger into a mould chamber which undergoes controlled evacuation in accordance with the position of a plunger. A parting compound is applied to at least one mold half and the application of a lubricant to the plunger. The light metal alloy consists of a primary alloy of invariable composition, with a limit placed on the proportions of Cu, Fe and Zn; the alloy undergoes smelting treatment, de-gassing and/or filtration before being introduced. The vacuum in the mould chamber is below 50 mbar when the molten alloy is introduced and the parting compound contains alkali halides and anti-corrosion additives.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: February 15, 2000
    Assignee: Bayrisches Druckguss-Werk Thurner GmbH & Co. KG
    Inventors: Jean-Pierre Gabathuler, Ivan Gyongyos, Hans-Gunther Thurner, Jurgen Wust
  • Patent number: 6024159
    Abstract: A zinc alloy melt-out core comprises from 0.75% to 3% Cu, from 0% to 0.3% Ni, from 0% to 0.5% Al, and balance Zn. The zinc alloy melt-out core is used in pressure casting processes for producing an aluminum article having a hollow. The zinc alloy core has a shape-imparting outer surface. In the pressure casting process, the zinc alloy core preserves a space corresponding to the hollow. The zinc alloy core has improved hot strength and thus maintains its integrity during the pressure casting process, inhibiting seepage of the core material into the aluminum cast article. Preferred zinc alloy melt-out cores further comprise an outer coating of insulating material selected from the group consisting of mica, graphite, ceramics and combinations thereof.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: February 15, 2000
    Assignee: Hayes Lemmerz International, Inc.
    Inventors: Greg Woycik, Randall Zeimet, Karl Voss
  • Patent number: 6021841
    Abstract: The method includes the steps of (a) analyzing the porosity of the green sand, (b) analyzing the contact force acting between sand particles of the green sand, (c) analyzing the fluid force of air existing around the sand particles, (d) calculating the acceleration of the sand particles from the force acting on the sand particles, the force being comprised of the contact force, the fluid force, and the gravity of the particles, (e) analyzing equations of motion to obtain the velocity and position of the sand particles after a minute period of time, from the calculated acceleration, and (f) repeating the steps (a), (b), (c), (d), and (e) until the sand particles stop moving.
    Type: Grant
    Filed: January 14, 1998
    Date of Patent: February 8, 2000
    Assignee: Sintokogio, Ltd.
    Inventor: Hiroyasu Makino
  • Patent number: 6018855
    Abstract: Movable insulated conveyor for the continuous casting of slabs, billets, blooms or other products, which is installed in line with a continuous casting plant (13) comprising at least two casting lines (11a-11b), at least one shears (14) and a first stationary tunnel furnace (15) to accommodate and accelerate segments of slabs (31) being positioned between the continuous casting plant (13) and a rolling train (12), a movable tunnel furnace (16) possibly being included in succession to the stationary tunnel furnace (15), at least one of the movable insulated conveyors (19) being comprised in succession to the stationary tunnel furnace (15) and/or upstream of, and in direct cooperation with, the rolling train (12), the movable insulated conveyor (19) including a lower base (32) to support rollers (33) conveying the segments of slabs (31) and an upper insulated and heated hood (20), which at least in the working position is immovable laterally and lengthwise, the lower supporting base (32) being capable of being
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: February 1, 2000
    Assignee: Danieli & C. Officine Meccaniche SPA
    Inventors: Fausto Drigani, Pietro Morasca
  • Patent number: 6019158
    Abstract: A ceramic investment mold is disposed in a casting chamber and communicates with a pour cup melt reservoir connected to the mold and having a reservoir volume for holding enough melt to fill the mold. The melt pour cup reservoir is communicated to the mold via an inverted loop feed gate so that the melt is fed from a lower region of the reservoir through the inverted loop feed gate to the mold upon gas pressurization of the reservoir. The loop feed gate is configured to have a loop region above the melt level in the reservoir so as to prevent melt flow from the reservoir to the more mold cavities in the absence of reservoir pressurization. While residing in the pour cup reservoir, oxides and other inclusion-forming particles in the melt can float to the upper surface of the melt, whereby the melt fed from the lower region of the reservoir to the mold via the inverted loop melt feed gate includes reduced amount of inclusion-forming particles.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: February 1, 2000
    Assignee: Howmet Research Corporation
    Inventors: Mark L. Soderstrom, Dale A. Grumm, Lester G. Striker
  • Patent number: 6019159
    Abstract: The method includes the start up parameters are inputted into a device which controls the caster. Molten metal is cast in a moving mold and cooled by extracting heat from the moving mold, which in turn extracts heat from the molten metal. Casting parameters are obtained for a casting cycle and sent to the device which controls the cooling of the metal being cast. Data from one cycle is compared to data from a previous cycle and the cooling of the metal being cast is automatically controlled in response to the comparison of data.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: February 1, 2000
    Assignee: Golen Aluminum Company
    Inventors: Rudolf Roder, Marcel Witschi
  • Patent number: 6015005
    Abstract: Tooling includes an inflatable arbor for forming a backdraft cavity in a foundry sand core. A core handling device includes an inflatable arbor, similar to the one used for forming the backdraft cavity in the sand core, whereby the lifting device arbor, when in its deflated state, may be inserted into the backdraft cavity of the sand core and then inflated to grip and become locked to the sand core.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: January 18, 2000
    Assignee: Deere Company
    Inventor: Larry Don Durchenwald
  • Patent number: 6015007
    Abstract: Cope and drag molds are formed using a matchplate, in which the matchplate has shift blocks on its upper and lower surfaces. The shift blocks form corresponding cavities in the cope and drag molds. Then, a gauge mechanism is calibrated with a gauge standard. The gauge mechanism generally includes a gauge block, a spring biased arm, and a meter adapted to measure movement of the spring biased arm relative to the meter. The calibrating step is performed by sliding the gauge mechanism into the gauge standard which provides prototypical drag and cope mold surfaces. The gauge mechanism is calibrated by setting the meter to zero when the spring biased arm engages the prototypical cope mold surface. Lastly, the gauge mechanism is inserted into the formed cavities in the actual cope and drag molds such that the gauge block engages the drag mold and the spring biased arm engages the cope mold.
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: January 18, 2000
    Assignee: Hunter Automated Machinery Corporation
    Inventors: William A. Hunter, William G. Hunter
  • Patent number: 6006818
    Abstract: The models comprise an expanded or expansible polymer or copolymer generally used for the fabrication of such models. The polymer or copolymer contains an oxidizing agent comprising a nitroaliphatic compound that accepts expansion without substantial alteration of its oxidizing properties, that does not substantially modify the characteristics of the polymer or copolymer before, during and after expansion, that does not harm the quality of the metal that is cast, and that has a decomposition temperature essentially identical to that of the polymer or copolymer.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: December 28, 1999
    Assignee: Huttenes-Albertus France (S.A.R.L.)
    Inventors: Emmanuel Berthelet, Michael Berthelet, Asita Bhattacharya
  • Patent number: 5996681
    Abstract: A method and apparatus for controlling quality in a foundry having a plurality of core shooting machines which produce individual cores which are assembled to produce multi-part core assemblies which serve as foundry molds. The cores are removed from the shooting machines and at least selected cores are measured in a non-contacting manner. The measured data are then compared with stored desired values which may be determined by an analysis of an acceptable core, and any core having measured data which deviate from the stored desired values is rejected. Thus, the production of defective castings is avoided.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: December 7, 1999
    Assignee: Adolf Hottinger KG
    Inventor: Walter L. Pohlandt
  • Patent number: 5996678
    Abstract: The apparatus comprises a table (5), on which a pattern plate (6) is attached, a flask (7), the bottom surface of which can be fitted to the pattern plate (6), a filling frame (30), the bottom surface of which can be fitted to the upper surface of the flask (7), and in which the highest part of its opening is smaller than the lowest part of its opening, a blow head (17), which is used for blowing in molding sand, and for squeezing the blown-in molding sand, and which is placed above the table (5), and a thin plate body (20), which can be inserted into the blown-in molding sand and which is placed around a sand holder (12) that is a part of the blow head (17), in which the highest part of the opening of the filling frame (30) has such a size that the outer surface of the thin plate body (20) can contact the inner surface of the highest part of the filling frame (30), and in which the size and shape of the lowest part of the opening of the filling frame (30) are the same as those of the opening of the flask (7)
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: December 7, 1999
    Assignee: Sintokogio, Ltd.
    Inventors: Shigeo Oda, Kimikazu Kaneto, Ryoji Kanayama, Kuniyasu Mori, Kazuo Sugimoto
  • Patent number: 5992499
    Abstract: Method and apparatus for reclaiming sand from a foundry sand containing, inter alia, a clay binder by cooling the foundry sand to a temperature at or below -40.degree. C. (-40.degree. F.) followed by separation of the sand from the binder while the sand is maintained at a temperature at or below 0.degree. C. (32.degree. F.). Foundry sands with clay binders have a water content to 1% to 15% by weight prior to being cooled.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: November 30, 1999
    Assignees: Air Products and Chemicals, Inc., American Metalcasting Services Int'l Inc.
    Inventors: William Lee Tordoff, Jeremy Paul Miller