Centrifugal Casting Means Patents (Class 164/286)
  • Patent number: 10456830
    Abstract: An alloy part is cast in a mold (280) having a part-forming cavity (292, 294, 296). The method comprises pouring a first alloy into the mold. The pouring causes: a surface (550) of the first alloy in the part-forming cavity to raise relative to the part-forming cavity; a branch flow of the poured first alloy to pass upwardly through a first portion (304) of a passageway; and the branch flow to pass downwardly through a second portion (310), of the passageway; solidifying some of the first alloy in the passageway to block the passageway while at least some of the first alloy in the part-forming cavity remains molten. A second alloy is poured into the mold atop the first alloy and solidified.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: October 29, 2019
    Assignee: United Technologies Corporation
    Inventors: Steven J. Bullied, Dilip M. Shah, Alan D. Cetel, John J. Marcin
  • Patent number: 9475117
    Abstract: A centrifugal casting apparatus including: a lower half-mold (10) mounted on a support (12) provided with driver for rotation about a substantially vertical central axis (14), the lower half-mold (10) being a solid of revolution having a first central cavity (36); an upper half-mold (16) facing the lower half-mold (10), the upper half-mold (16) being a solid of revolution having a second central cavity (56); and a device for causing the axial movement of the half-molds (10, 16) towards and away from each other. The lower half-mold (10) and the upper half-mold (16) each have at least one passage (46, 66) which puts the respective central cavity (36, 56) into communication with the outside through an outlet aperture through which the central axis (14) does not pass.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: October 25, 2016
    Assignee: EMBRACO EUROPE S.r.l.
    Inventors: Michele Marino, Mauro Feroleto
  • Patent number: 8960263
    Abstract: A method and apparatus for centrifugal casting, in which transfer functions are developed relating the fluidity of molten metal, for example iron of varying composition, to casting machine movement for a particular mold in order to cast objects, for example pipe, having desired and uniform characteristics, including wall thickness. Fluidity is calculated for each pour of molten metal based on the measured pour temperature and measured liquidus arrest temperature. A drive system controlled by a programmable logic controller moves the casting machine in accordance with the output of the transfer functions based on the calculated fluidity.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: February 24, 2015
    Assignee: United States Pipe and Foundry Company, LLC
    Inventors: Kenneth J Watts, Terry M Wood
  • Publication number: 20140375167
    Abstract: Embodiments of the present invention provide methods for manufacturing an even-wall rotor or stator that do not suffer from drawbacks of the prior art. Even-wall rotors or stators produced according to those methods are also provided. In one embodiment, a method for manufacturing a rotor or stator for use in a mud motor is provided. The method includes providing a vacuum chamber; providing a metal electrode at least partially disposed in the vacuum chamber; providing a mold disposed in the vacuum chamber; and melting a portion of the electrode with a direct current arc, the molten metal flowing into the mold ring.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 25, 2014
    Inventors: David W. TEALE, Robert P. BADRAK
  • Publication number: 20140306570
    Abstract: The centrifugal casting apparatus comprises: a lower half-mould (10) mounted on a support (12) provided with driving means for rotation about a substantially vertical central axis (14), the lower half-mould (10) being a solid of revolution having a first central cavity (36); an upper half-mould (16) facing the lower half-mould (10), the upper half-mould (16) being a solid of revolution having a second central cavity (56); and means for causing the axial movement of the half-moulds (10, 16) towards and away from each other. The lower half-mould (10) and the upper half-mould (16) each have at least one passage (46, 66) which puts the respective central cavity (36, 56) into communication with the outside through an outlet aperture through which the central axis (14) does not pass.
    Type: Application
    Filed: November 7, 2012
    Publication date: October 16, 2014
    Applicant: EMBRACO EUROPE S.R.L.
    Inventors: Michele Marino, Mauro Feroleto
  • Publication number: 20140262109
    Abstract: Disclosed herein is a device comprising: vacuum chamber; a stage configured to receive BMG in a molten state or a BMG feedstock, configured to spin, and located in the vacuum chamber; a heater configured to melt the BMG feedstock or to keep BMG in a molten state molten; wherein the stage comprises one or more conduits therein and the conduits are configured to accommodate a cooling fluid. Also disclosed herein is a method of forming a solid BMG sheet, the method comprising: disposing BMG in a molten state onto a stage; spreading the BMG in a molten state into a sheet of BMG in a molten state by spinning the stage; cooling the sheet of BMG in a molten state to form a solid BMG sheet.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: Crucible Intellectual Property, LLC
    Inventor: Joseph W. Stevick
  • Patent number: 8833433
    Abstract: Tubular metal articles such as pipe and cylinder liners are produced by centrifugal casting on a permanent metal mold coated by refractory glass on the active surface. A coating suspension mix is evenly distributed onto the mold to form a uniform layer of insulation on the surface of the mold. The material for the coating includes essentially a waterborne suspension mix of glass particles. The suspension is given time to dry on the surface of the mold. The glass particles dispersed in the suspension are both non-crystalline and nonporous. The glass particles in the suspension and forming the coating are not dissolved and do not chemically attract the polar water molecule or cause it to bond to the surface of glass in the suspension or to the mold active surface. Articles cast as such are smooth surfaced and require only limited machining.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: September 16, 2014
    Inventor: Charles Earl Bates
  • Publication number: 20140251570
    Abstract: A centrifugal casting apparatus includes a rotatable assembly to rotate about a rotation axis. The rotatable assembly includes a sprue chamber positioned about the rotation axis and is shaped to receive a supply of molten material. A first gate and a second gate are positioned to receive molten material from the sprue chamber in a general direction of centrifugal force. A first cavity and a second cavity are stacked and are respectively positioned to receive molten material from the first gate and the second gate in the general direction of centrifugal force.
    Type: Application
    Filed: March 11, 2013
    Publication date: September 11, 2014
    Applicant: ATI PROPERTIES, INC.
    Inventors: John W. Foltz, IV, Raul A. Martinez-Ayers, Aaron L. Fosdick
  • Publication number: 20140196863
    Abstract: Tubular metal articles such as pipe and cylinder liners are produced by centrifugal casting on a permanent metal mold coated by refractory glass on the active surface. A coating suspension mix is evenly distributed onto the mold to form a uniform layer of insulation on the surface of the mold. The material for the coating includes essentially a waterborne suspension mix of glass particles. The suspension is given time to dry on the surface of the mold. The glass particles dispersed in the suspension are both non-crystalline and nonporous. The glass particles in the suspension and forming the coating are not dissolved and do not chemically attract the polar water molecule or cause it to bond to the surface of glass in the suspension or to the mold active surface. Articles cast as such are smooth surfaced and require only limited machining.
    Type: Application
    Filed: January 16, 2013
    Publication date: July 17, 2014
    Inventor: Charles Earl Bates
  • Publication number: 20140182804
    Abstract: The embodiments described herein relate to methods and apparatus for counter-gravity formation of BMG-containing hollow parts. In one embodiment, the BMG-containing hollow parts may be formed by first feeding a molten metal alloy in a counter-gravity direction into a mold cavity to deposit the molten metal alloy on a surface of the mold cavity and then solidifying the deposited molten metal alloy.
    Type: Application
    Filed: March 6, 2014
    Publication date: July 3, 2014
    Applicants: Crucible Intellectual Property, LLC, Apple Inc.
    Inventors: Theodore A. Waniuk, Joseph Stevick, Sean O'Keeffe, Dermot Stratton, Joseph Poole, Matthew Scott, Christopher Prest
  • Publication number: 20140083646
    Abstract: The embodiments described herein relate to methods and apparatus for counter-gravity formation of BMG-containing hollow parts. In one embodiment, the BMG-containing hollow parts may be formed by first feeding a molten metal alloy in a counter-gravity direction into a mold cavity to deposit the molten metal alloy on a surface of the mold cavity and then solidifying the deposited molten metal alloy.
    Type: Application
    Filed: September 27, 2012
    Publication date: March 27, 2014
    Inventors: THEODORE A. WANIUK, JOSEPH STEVICK, SEAN O'KEEFFE, DERMOT J. STRATTON, JOSEPH C. POOLE, MATTHEW S. SCOTT, CHRISTOPHER D. PREST
  • Publication number: 20120216980
    Abstract: A method for controlling a boride distribution in a metal matrix compost includes controlling a distribution of the boride particles are controlled during a solidification of a molten composite material. The controlling of the redistribution of the boride particles includes applying a heat to the composite material to form a molten composite material. The method includes, holding, by a mold (120, 715), the molten composite material. The method also includes focusing, by a reinforcement particle unit (100, 700), a location of the boride particles during a cooling of the molten composite material. The reinforcement particle unit could include a directed solidification unit (100). The reinforcement particle unit could also include centrifugal casting system (700). The arm includes a center mounting point (725).
    Type: Application
    Filed: February 24, 2012
    Publication date: August 30, 2012
    Applicant: Raytheon Company
    Inventors: Alexandra Cintron-Aponte, Jose R. Vazquez
  • Patent number: 8186417
    Abstract: Molten metal is introduced into the cavity by a combined gravity feed and centrifugal force feed using a rotating turntable under electrical or electronic control. The centrifugal force is controlled to be substantially constant until the metal has solidified. This is accomplished by controlling the ramp-up acceleration of the turntable where rotational velocity is a time-dependent function of rotational radius and molten metal mass and taking into account the flow rate and cooling rate of the liquid metal. The process reduces waste and the attendant energy consumption associated with the quantity of metal required to be melted for the initial pour and associated with reprocessing and reusing the waste component.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: May 29, 2012
    Assignee: Gravcentri, LLC
    Inventor: Vagner Ribeiro
  • Patent number: 8186421
    Abstract: A utility pole mold including an elongated, hollow mold body having an internally tapered end and a reservoir extending radially out therefrom. A reusable barrier member is detachably secured to the at least one wall opposite the tapered end for containing a molten metal within the reservoir. In use, a lance is inserted into the mold body and a pouring end of the lance is positioned about the reservoir. The mold body and reservoir are then rotated, and the molten metal is poured from the pouring end at a constant rate. As the lance travels along the length of the mold body at an accelerating rate, a continuous layer of the molten material is deposited within the mold body and the reservoir. Following casting, the barrier is removed from the reservoir, and the newly formed utility pole is removed from mold. That portion of the pole that was formed within the reservoir portion is then removed to provide a pole having a bottom end with a desired wall thickness and interior taper.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: May 29, 2012
    Assignee: McWane Global
    Inventors: Joseph F. Carter, Steven G. Meisel, Keith W. Mallet
  • Patent number: 8167023
    Abstract: An apparatus for centrifugal casting under vacuum includes a rotor having a shaft extending in an essentially vertical direction and being rotatable around an axis defined by the shaft. The rotor has at least one mold, at least one crucible, and a gas-tight housing in which the mold and the crucible are accommodated. The apparatus also includes a vacuum source to create a vacuum in the housing, a heating device that melts a metal, a drive device that drives the shaft in order to rotate the rotor, and an auxiliary acceleration device configured to generate a force to further rotate the rotor to overcome a moment of inertia of the rotor. The auxiliary acceleration device includes a jet propulsion and/or at least one pushing actuator accelerating the resting rotor.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: May 1, 2012
    Inventor: Manfred Renkel
  • Patent number: 8136572
    Abstract: A method of producing a precision centrifugal casting includes: a) providing a centrifugal casting device having a rotor rotatable around an axis, at least one crucible accommodated in the rotor, and at least one mold associated with the crucible and disposed at a first radial distance from the axis, b) creating a metal melt within the crucible, c) rotating the rotor thereby forcing the melt using centrifugal forces from the crucible into the mold, d) exerting a pressure on the melt forced into the mold until the temperature of the solidifying melt has reached a predetermined cooling-temperature in a range of 1300° to 800° C., wherein the pressure corresponds to the centrifugal force acting on the melt just when the mold is completely filled, times a factor of 1.0 to 5.0, and e) relieving the pressure when the temperature of the solidifying melt is lower than the predetermined cooling-temperature.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: March 20, 2012
    Inventor: Manfred Renkel
  • Patent number: 8136573
    Abstract: A turbine blade having a leading edge portion and a flowing-off edge portion is formed using the following steps: providing a centrifugal casting device having a rotor and at least one crucible being accommodated in the rotor; providing a mold having an extended cavity for forming the turbine blade; arranging the mold so that an inlet opening of the mold is arranged with an outlet opening of the crucible, and further arranging the mold so that a mold leading edge is directed in a direction against the rotational direction of the rotor; forcing a metal melt by means of centrifugal forces from the crucible into the mold; exerting a pressure on the melt being forced into the mold until the temperature of the solidifying melt has reached a predetermined cooling-temperature; and relieving the pressure when the temperature of the solidifying melt is below the predetermined cooling-temperature.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: March 20, 2012
    Inventor: Manfred Renkel
  • Patent number: 7712511
    Abstract: The present invention relates to a casting mold having a molten metal received therein which is rotated in one direction by a rotary device with the vertical axis as a rotary axis while solidifying the molten metal for a predetermined period of time, and, after the predetermined period of time is lapsed, the casting mold is rotated in the direction opposite the direction of rotation for a predetermined period of time, and the rotation in the opposing directions is repeated so that the molten metal is solidified. The molten metal can be shaken and agitated without roughening the surface of the molten metal to uniformalize the distribution of temperature of the molten metal in the casting mold.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: May 11, 2010
    Assignees: The Japan Steel Works, Ltd., Honda Motor Co., Ltd.
    Inventors: Yuuichi Ienaga, Tadayoshi Tsukeda, Hitohisa Yamada, Masahiko Muro, Yasuhiro Aoki
  • Patent number: 7594310
    Abstract: A device and method for producing, by molding, a circular-shaped mechanical part made of a metal alloy. The device has a rotatable hollow mold for receiving a predetermined quantity of the metal alloy. The predetermined quantity of the metal alloy is defined by at least one segment of a metal alloy rod. An inductive heating device melts the metal alloy to a melting point. A blank of the mechanical part being formed by centrifuging the melted metal alloy. Cooling the blank in the hollow mold to a second temperature which corresponds to a desired malleability. Processing the blank with a shaping tool to obtain a desired internal profile. To harden and form the circular-shaped mechanical part, the blank is further cooled to a tempering temperature.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: September 29, 2009
    Inventor: Gianfranco Passoni
  • Publication number: 20090133850
    Abstract: Systems for centrifugally casting a highly reactive titanium metal including a cold wall induction crucible for containing a titanium metal charge, the induction crucible having a plurality of induction coils and a removable bottom plate, a power source to heat the titanium metal charge in the induction crucible to obtain a molten metal, a preheated secondary crucible for catching the molten metal as it falls from the induction crucible after the removable bottom plate has been withdrawn and the power source turned off, and a centrifugal casting machine for holding and accelerating the secondary crucible to centrifugally force the molten metal into a casting mold and produce a cast component.
    Type: Application
    Filed: November 27, 2007
    Publication date: May 28, 2009
    Inventors: THOMAS JOSEPH KELLY, Michael James Weimer
  • Publication number: 20080236707
    Abstract: A device and method for producing, by molding, a circular-shaped mechanical part made of a metal alloy. The device has a rotatable hollow mold for receiving a predetermined quantity of the metal alloy. The predetermined quantity of the metal alloy is defined by at least one segment of a metal alloy rod. An inductive heating device melts the metal alloy to a melting point. A blank of the mechanical part being formed by centrifuging the melted metal alloy. Cooling the blank in the hollow mold to a second temperature which corresponds to a desired malleability. Processing the blank with a shaping tool to obtain a desired internal profile. To harden and form the circular-shaped mechanical part, the blank is further cooled to a tempering temperature.
    Type: Application
    Filed: September 2, 2005
    Publication date: October 2, 2008
    Inventor: Gianfranco Passoni
  • Publication number: 20080190581
    Abstract: The invention makes it possible to manufacture high-quality cast parts in a productive manner in that a casting mould with a filling opening pointing in the direction of gravity is provided during the casting of molten metal. The casting mould with the filling opening is coupled to a melt container containing the molten metal, and the molten metal is conveyed from the melt container into the casting mould counter to the direction of gravity. The casting mould is sealed directly after filling with molten metal using a locking means which is at least temporarily connected to the casting mould in a fixed manner, in that the casting mould is decoupled from the melt container directly after closure of the casting mould and in that the casting mould is rotated about a horizontal axis of rotation, wherein the casting mould remains in a sealed position with respect to the locking means.
    Type: Application
    Filed: September 2, 2005
    Publication date: August 14, 2008
    Applicant: HYDRO ALUMINIUM ALUCAST GMBH
    Inventor: Herbert Smetan
  • Patent number: 7387153
    Abstract: A centrifugation injection mold comprising: a lower mold portion having a basic block the lower portion of which is mounted to and rotates within bearing means that are affixed to a machine structure, a plurality of axial columns the bottom portions of which are affixed around the outer portions of the basic block, and a moveable block defining a lower mold cavity and being mounted in a sliding relationship to the axial columns, in order to be axially displaced between an open mold position and a closed mold position; an impelling means operatively associated with the machine structure and with the moveable block for displacing the moveable block to the open mold position against the action of an elastic means; a locking means mounted to each axial column; and an upper mold portion to be removably seated on the axial columns and affixed thereto by the locking means in a closed mold position.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: June 17, 2008
    Assignee: Empresa Brasileira De Compressores S.A. - Embraco
    Inventor: Rivio Arturo Ramirez
  • Publication number: 20080096039
    Abstract: A tubular formation technique utilizing centrifugal casting incorporating a moveable launder system to deliver molten alloy along an extended length within a centrifugal caster to form a hollow tubular precursor of extended length. The technique is adaptable to all alloy systems but may be particularly suited for so called “hard alloys” that are susceptible to substantial work hardening or are difficult to extrude.
    Type: Application
    Filed: September 12, 2007
    Publication date: April 24, 2008
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Anil K. Sachdev, K. Balasubramanian
  • Patent number: 6997236
    Abstract: A bearing arrangement for a centrifugation injection mold, comprising an upper mold portion (10) and a lower mold portion (20), which are respectively and rotatively mounted to an upper bearing (30) and to a lower bearing (40), the latter comprising: a first flat ring (41) affixed to a machine structure (E) and presenting a radial gap that is internal in relation to the lower mold portion (20); an annular cage (42) bearing spheres (44) seated on the first flat ring (41), said annular cage (42) presenting radial gaps that are external and internal in relation to the machine structure (E) and to the lower mold portion (20), respectively; and a second flat ring (45) inferiorly seated on the spheres (44) of the annular cage (42) and maintaining radial gaps that are external and internal in relation to the machine structure (E) and to the lower mold portion (20), respectively, axially bearing the latter.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: February 14, 2006
    Assignee: Empresa Brasileira de Compressores S.A.
    Inventors: Rivio Arturo Ramirez, Antonio Sardo
  • Patent number: 6797081
    Abstract: The present invention relates to a casting method which employs rapid solidification of metal, rare-earth metal or the like, as well as to a casting apparatus and a cast alloy. A centrifugal casting method includes the steps of pouring a molten material onto a rotary body; sprinkling the molten material by the effect of rotation of the rotary body; and causing the sprinkled molten material to be deposited and to solidify on the inner surface of a rotating cylindrical mold. The axis of rotation of the rotary body and the axis of rotation of the cylindrical mold are caused not to run parallel to each other. The centrifugal casting method can attain a decrease in average deposition rate. As a result, generation of the dendritic &agr;Fe phase or generation of a segregation phase of Mn or the like is suppressed, thereby realizing a high-performance R-T-B-type rare-earth magnet alloy.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: September 28, 2004
    Assignee: Showa Denko K.K.
    Inventors: Hiroshi Hasegawa, Masahide Utsunomiya, Uremu Hosono, Yoichi Hirose
  • Patent number: 6776214
    Abstract: Methods for making various titanium base alloys and titanium aluminides into engineering components such as rings, tubes and pipes by melting of the alloys in a vacuum or under a low partial pressure of inert gas and subsequent centrifugal casting of the melt in the graphite molds rotating along its own axis under vacuum or low partial pressure of inert gas are provided, the molds having been fabricated by machining high density, high strength ultrafine grained isotropic graphite, wherein the graphite has been made by isostatic pressing or vibrational molding, the said molds either revolving around its own horizontal or vertical axis or centrifuging around a vertical axis of rotation.
    Type: Grant
    Filed: October 1, 2003
    Date of Patent: August 17, 2004
    Assignee: Santoku America, Inc.
    Inventors: Ranjan Ray, Donald W. Scott
  • Patent number: 6634413
    Abstract: Methods for making various nickel based superalloys into engineering components such as rings, tubes and pipes by melting of the alloys in a vacuum or under a low partial pressure of inert gas and subsequent centrifugal casting of the melt in the graphite molds rotating along its own axis under vacuum or low partial pressure of inert gas are provided. The molds have been fabricated by machining high density, high strength ultrafine grained isotropic graphite, wherein the graphite has been made by isostatic pressing or vibrational molding.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: October 21, 2003
    Assignee: Santoku America, Inc.
    Inventors: Ranjan Ray, Donald W. Scott
  • Patent number: 6595268
    Abstract: A spin cast die assembly includes a casing, an insert and an end cap assembly for retaining the insert against an annular shoulder within the casing. The end cap assembly has a mounting ring attached an end of the casing. The mounting ring receives a flyweight ring which engages an end of the insert and which pivotally supports a plurality of flyweight members which are mounted radially internally with respect to the mounting ring. The mounting ring has an annular flyweight engagement surface which faces generally radially inwardly and towards the shoulder. As the assembly is spun, the inner ends of the flyweight members pivot radially outwardly. The flyweight members thereby cooperate with the flyweight engagement surfaces of the mounting ring to cause the flyweight ring to move axially towards the insert and thereby force the insert against the shoulder.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: July 22, 2003
    Assignee: Deere & Company
    Inventor: Joseph Paul Schmitz
  • Patent number: 6412542
    Abstract: A centrifugal dental casting station for a rotating casting machine comprises a tank having a base, side walls, a ceiling having first slide holes, a first opening, a closing member for the first opening, and a cross-traversing partition attached to the base and the side walls in the tank. The base, the side walls and the ceiling form a cavity, and the cavity can be filled with a filler material through the first opening. A support member is attached to the tank for supporting the rotating casting machine thereon. The casting station provides a substantially stable platform for operating the rotating casting machine thereon.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: July 2, 2002
    Inventor: Kwang H. Lee
  • Publication number: 20010050157
    Abstract: A method of making jewelry in which liquid gold is shaped into the desired hollow configuration using centrifugal/gyroscopic motion. The gold is liquidified either before application to a mold or melted after it is deposited into the mold. A centrifugal force is applied to the mold to press the gold against the interior walls of the mold and the gold is allowed to solidify. Once solid, in the preferred embodiment, the gold is “hardened” using a pulse of air pressure applied to the interior of the mold.
    Type: Application
    Filed: February 23, 2001
    Publication date: December 13, 2001
    Inventor: Gerald Drown
  • Patent number: 5603783
    Abstract: A one-piece steering wheel is formed as a unitary casting from an alloy that includes 11.5% to 14% by weight silicon, and 350 to 450 parts per million strontium. Preferably the steering wheel mold is rotated during casting at relatively high rotational speeds exerting 100 g to 250 g force on the wheel. An optimum rotational speed is disclosed. A one-piece steering wheel formed according to the invention exhibits minimal length ferro-silicon hair-like strands, and thus exhibits reduced brittleness.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: February 18, 1997
    Assignee: M. J. Grootes Investments CC
    Inventor: Cornelius J. T. Ferreira
  • Patent number: 5441396
    Abstract: The machine has a main structure which supports, so that they can rotate about a substantially vertical rotation axis, a lower plate for supporting a centrifugal molding die and an upper plate. The plates face each other on a substantially horizontal plane and are mutually movable in a direction parallel to the rotation axis in order to ensure closure of the mold or to allow removal of the mold. The plates are accommodated in a chamber which is delimited by walls connected to the main structure and has, on the front side of the machine, an opening for access to the die. The opening is closed by a movable cover connected to at least one of the side walls delimiting the chamber by a pair of connecting rods. Each connecting rod has one end pivoted to the cover and another end pivoted to the related side wall with substantially horizontal pivoting axes to allow an opening movement of the cover along a vertical upward component and along a horizontal component toward the rear side of the machine.
    Type: Grant
    Filed: October 8, 1993
    Date of Patent: August 15, 1995
    Assignee: NICEM S.p.A.
    Inventor: Romeo Nicetto
  • Patent number: 5253697
    Abstract: An apparatus and process is disclosed for the preparation by molding of composite materials formed of a metallic or organic matrix and at least one reinforcing element which includes a mold having an axis of revolution, the mold being equipped with a rotator allowing it to rotate about its axis, with a device for feeding liquid matrix material and with a device for feeding a reinforcing element. The reinforcing element feeding device opens into the feed device of the matrix material-feeding device which causes turbulence. The feed device can be a shoot, a casting channel, a feed pipe, a funnel or another equivalent device.
    Type: Grant
    Filed: August 27, 1991
    Date of Patent: October 19, 1993
    Assignee: Les Bronzes d'Industrie, societe anonyme
    Inventors: Luc LaJoye, Laurent LaJoye
  • Patent number: 5223278
    Abstract: The centrifugal casting machine for molding parts by centrifugal casting of metals, or metallic alloys, with a low melting point, or of synthetic materials, includes a main framework which supports a carousel which can rotate about a main axis and supports a mold. The carousel is actuated with a rotary motion about the main axis by a motor which is arranged so that the axis of its output shaft substantially coincides with the main axis.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: June 29, 1993
    Assignee: Nicem S.r.l.
    Inventor: Romeo Nicetto
  • Patent number: 5179995
    Abstract: A centrifugal vacuum assist ambient air casting apparatus and method to fill a casting flask having a mold with a pour opening in communication with the pour opening of a casting crucible filled with molten metal and ceramics comprising: centrifugally spinning the casting flask and casting crucible with their pour openings aligned such that the resulting centrifugal forces empty the contents of the casting crucible into the casting flask, while simultaneously applying a directional vacuum to the casting flask in alignment with the resultant centrifugal forces to evacuate trapped gases from the mold and assist in drawing in the molten metal and ceramics into the mold.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: January 19, 1993
    Inventor: Stanley R. Limb
  • Patent number: 5161600
    Abstract: The system comprises a main casting unit and a glove box unit for reworking cast items. The main casting unit has a frame with a casting chamber, a heating element, a vacuum, a supply of inert gas and a rotatable casting arm for spin casting molten material into a mold. The arm is adapted to removably mount a crucible and mold at one end and, an adjustable counterweight at the other end. The heating element can be moved into and out of the path of the arm and is adapted to heat metallic material in the crucible. The main casting unit also has a driver that projects into the chamber for driving the casting arm with reduced wear on seals between the chamber wall and the driver. A safety bar is provided to prevent the arm from spinning except when desired. The main unit also has electrical and gas conduit connectors for connecting the glove box unit to the main unit.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: November 10, 1992
    Assignee: Jeneric/Pentron Inc.
    Inventors: Craig Brodersen, Arun Prasad
  • Patent number: 5119865
    Abstract: In a Cu-alloy mold for use in centrifugal casting of Ti or Ti-alloys, the mold body is made of a Cu alloy satisfying the following relationship:Ts+0.3.rho..gtoreq.70where Ts is the tensile strength (kg/mm.sup.2), and .rho. is the electrical conductance (% IACS). A cavity disposed in the mold body has a volume which is at most 30% of the volume of the mold body. Also disclosed is a method for centrifugally casting Ti or Ti-alloy by the use of the above-described mold.
    Type: Grant
    Filed: January 24, 1991
    Date of Patent: June 9, 1992
    Assignee: Mitsubishi Materials Corporation
    Inventors: Yoshiharu Mae, Tsutomu Oka
  • Patent number: 4830084
    Abstract: Apparatus for the production of a metal article comprises means for maintaining a reservoir of molten metal with a free surface, means for rotating the free surface of the reservoir about an axis such that the molten metal is atomized and thrown outwardly away from the said surface by centrifugal action, and a substrate in the path of the atomized particles of said molten metal, whereby a solid article may be built up on the substrate by solidifying the atomized particles thereon. The molten metal may be produced by melting an electrode or otherwise.An annular solid metal article is disclosed having excellent mechanical properties. The solid metal article is produced in a single step by a spray deposition process. Molten metal is centrifugally atomized to splat and build up on a cooled mold surface disposed around the centrifuge means. Controlled relative reciprocatory movement in the direction of the rotational axis of the centrifuge is provided.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: May 16, 1989
    Inventor: Alfred R. E. Singer
  • Patent number: 4763717
    Abstract: A method for melting and casting of metals and alloys and an apparatus using the method. The method consists of utilizing a compact assembly for melting and centrifugal casting of metals. The assembly includes a mold or chiller which is rotatable around a vertical axis. The mold communicates with a sealed lower housing containing an oven for the melting of the metal. The assembly is such that the interior chambers of both the oven and the mold are positioned in a vacuum during the entire time of the process of melting of the metal contained in the oven. The oven is movable vertically and is maintained in a position such that the lower extremity of a hollow vertical channel which feeds the mold, remains outside of the molten metal in the interior cavity of the oven when melting is occurring. Thus, the melting is accomplished entirely in a vacuum condition, thereby avoiding the formation of oxides or other chemical compounds.
    Type: Grant
    Filed: April 18, 1983
    Date of Patent: August 16, 1988
    Inventor: Pierre Lajoye
  • Patent number: 4723904
    Abstract: Apparatus in which moulds may be prepared by centrifugal casting comprises a moulding case comprising two plates and spacing means such as two spacing rings therebetween, each of the plates having an opening on or near a central axis of the case for supply of a room temperature vulcanizing (RTV) rubber or molten casting material in the case, means for clamping the two plates together such as a clamping nut threaded on a pillar; and means for spinning the moulding case about a central axis such as a motor-drivable turntable. The moulding case is spun about the said central axis and simultaneously RTV rubber supplied into the moulding case to prepare a mould. A cast may be taken in the resulting mould spinning the mould whilst supplying molten casting material into the mould. Spinning is continued until the casting material has solidified.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: February 9, 1988
    Assignee: Centricast Limited
    Inventors: Brian Maynard, John Tiranti
  • Patent number: 4700769
    Abstract: Improved casting of titanum or alloy of titanium is obtained by using a crucible and a mold made of high-purity magnesium oxide and/or zirconium oxide. It is also possible for only the interior portion of the crucible to be made of such high-purity material, or for the mold to be made of copper or an alloy of copper. The mold and crucible can be used in a centrifugal-type casting machine or a compression-type casting machine. In either machine, discharge vents must be provided in the mold to connect the casting chamber with the outer atmosphere. An argon electric arc generated between a pivotable, tiltable cathode and an anode may be used for melting the titanium in the crucible. A high-frequency electric current can also be used to melt the titanium. By using the above apparatus, it is possible to obtain castings which are dimensionally accurate and do not have an external layer of fragile metal oxide or rough cavities.
    Type: Grant
    Filed: June 18, 1985
    Date of Patent: October 20, 1987
    Assignee: Ohara Co., Ltd.
    Inventors: Isao Ohara, Seizo Nakamura
  • Patent number: 4687044
    Abstract: A centrifugal injection machine comprises a rotor arm bearing at each of a pair of free ends a pivotably mounted container. A holder which retains a multiplicity of workpieces is insertable into a capsule or cavity within each container. The rotary arm contains a reservoir associated with each container or liquifying a charge of material. Upon rotation of the machine at a high velocity, the liquified material is transferred from the reservoir to the container in a vacuum and is pressurized therein as a result of centripetal acceleration. Upon the termination of a predetermined interval, a trip mechanism is activated to rotate the containers so that the molten liquid which has not been injected under pressure into recesses in the workpieces is ejected or discharged from the containers. The containers rotate within a vacuum chamber which is depressurized prior to the centrifuge operation.
    Type: Grant
    Filed: May 3, 1985
    Date of Patent: August 18, 1987
    Assignee: Tam Ceramics, Inc.
    Inventor: Clarence L. Wallace
  • Patent number: 4628984
    Abstract: Method and apparatus for establishing a layer of particulate material on at least a portion of the internal surface of a centrifugal casting mold by confining a quantity of the particulate material in a cavity, inserting the cavity into the mold, rotating the mold and the cavity at substantially the same rate adequate to apply substantial centrifugal force to the particulate material in the cavity, and opening the cavity to release the particulate material while continuing to rotate the mold and the cavity.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: December 16, 1986
    Inventor: Charles H. Noble
  • Patent number: 4601322
    Abstract: A pipe mold for centrifugally casting pipe is disclosed. The pipe mold according to the present invention is made by depositing weld material on a rigid shell. The rigid shell is obtained by forming a flat plate into a cylinder and welding the resultant seam. Additional rigid shells can be circumferentially welded together to obtain a desired length. The welded seams are areas of weakness called metallurgical notches. To eliminate the metallurgical notches, weld material is deposited on the shell. In one embodiment, weld material is deposited on the outside of the shell. The shell then is machined away. The resultant pipe mold has a total wall thickness comprising weld material and is free of metallurgical notches. In addition, the need for furnace heat-treatment to achieve properties in the weld material can be eliminated.
    Type: Grant
    Filed: March 13, 1984
    Date of Patent: July 22, 1986
    Assignee: National Forge Company
    Inventor: Ashok K. Khare
  • Patent number: 4510987
    Abstract: Equipment (3) for centrifugal casting from a crucible (5) into a mold (8) is modified by the addition of agitation means (19) movable relative to the crucible (5) and a heating furnace (30) which is movable relative to the mold (8) in order to heat the latter, before casting, to a temperature close to that of the alloy in the thixotropic state.
    Type: Grant
    Filed: February 7, 1983
    Date of Patent: April 16, 1985
    Assignee: Association pour la Recherche et le Developpemente des Methods et Processus Industrieles (Armines)
    Inventor: Jean Collot
  • Patent number: 4493360
    Abstract: Molten metal is poured into a substantially cylindrical mold from its bottom while the mold is being rotated about its vertical center axis. The ingot-making apparatus comprises a substantially cylindrical mold, stool, vertical pouring channel communicating with a runner provided in the stool, metal receiver communicating with the top of the pouring channel, and a rotary table on which the mold is placed through the stool. The metal receiver is shaped like a body of rotation formed by rotating a curve having an opening at the top in a vertical plane about the axis of rotation of the rotary table.
    Type: Grant
    Filed: August 30, 1983
    Date of Patent: January 15, 1985
    Assignee: Kanto Special Steel Works Ltd.
    Inventors: Hiroyuki Takahashi, Tomohiro Ogata
  • Patent number: 4478567
    Abstract: A front loading spin caster for spin casting a mold includes a vertically stationary top plate, a vertical movable bottom plate, a housing in which the top and bottom plates are disposed, a loading door disposed on one of the sides of the housing and adapted to allow the mold to be moved therethrough in a generally horizontal direction and placed on the bottom plate. The bottom plate can then be moved vertically upward to cause the mold to contact the top plate and a rotational force applied to the top plate propagates from the top plate through the mold to the bottom plate, the top plate, bottom plate and mold thus rotating together.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: October 23, 1984
    Assignee: Tekcast Associates, Inc.
    Inventor: Leonard S. Schaer
  • Patent number: 4418740
    Abstract: A centrifugal caster comprising a motor driven centrifuge arm connected to a weight arm, both of which are rotatable about a vertical axis. A casting chamber is connected to the centrifuge arm and has a melting crucible disposed therein, and a counterweight is fixedly attached to the weight arm. The casting chamber is provided with a region for mounting a muffle set comprising a casting muffle inserted into an exchangeable muffle cage which is associated with the casting muffle according to size and weight, whereby the total weight of the muffle set is of such magnitude that upon rotation, the centrifuge arm is in balance with the weight arm and its fixedly attached counterweight.
    Type: Grant
    Filed: March 26, 1981
    Date of Patent: December 6, 1983
    Assignee: Fried. Krupp Gesellschaft mit beschrankter Haftung
    Inventors: Ronald Friedrich, Werner Hammecke, deceased
  • Patent number: 4392805
    Abstract: A centrifugal casting apparatus comprises a mold mounted for rotation about the vertical axis thereof and having a bottom provided with a through axial opening. A member having a helicoidally shaped surface is axially mounted within the opening in the bottom. The member has a lower portion to be immersed into a melt and extending out of the opening and downwardly of said bottom of the mold. The mold and the member are connected with a rotation drive and a vertical motion drive.
    Type: Grant
    Filed: October 31, 1980
    Date of Patent: July 12, 1983
    Inventors: Oleg L. Golyak, Leonty A. Golyak, Ivan R. Stepurenko