By Utilizing A Cooling Liquid Patents (Class 164/126)
  • Patent number: 10105757
    Abstract: System, methods for improving grain growth in a cast melt of a superalloy are provided. The system includes at least a mold having a shape defining a part of a turbo machine, e.g., a turbine blade. A cast melt, e.g., a superalloy, is poured into the mold, and one or more heating/cooling elements are arranged in the cast melt. The system further includes a controller operatively connected to the elements for controlling the electrical current of, e.g., a heating wire of the heating element, or controlling the flow-rate for, e.g., a coolant of the cooling element. By controlling, i.e., adjusting the current and/or flow-rate, via the controller, a temperature gradient may be induced to improve grain growth.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: October 23, 2018
    Assignee: SIEMENS ENERGY, INC.
    Inventor: Gerald J. Bruck
  • Patent number: 9976208
    Abstract: The present invention provides a Cu—Fe—P alloy which has a high strength, high conductivity and superior bending workability. The copper alloy comprises 0.01 to 1.0% Fe, 0.01 to 0.4% P, 0.1 to 1.0% Mg, and the remainder Cu and unavoidable impurities. The size of oxides and precipitates including Mg in the copper alloy is controlled so that the ratio of the amount of Mg measured by a specified measurement method in the extracted residue by a specified extracted residue method to the Mg content in said copper alloy is 60% or less, thus endowing the alloy with a high strength and superior bending workability.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: May 22, 2018
    Assignee: Kobe Steel, Ltd.
    Inventors: Yasuhiro Aruga, Katsura Kajihara, Takeshi Kudo
  • Patent number: 8813823
    Abstract: An annular clean metal casting mold has a mold body which includes a cold bottom mold plate and a peripheral cold mold plate in connection with the cold bottom mold plate. An annular hot preservation layer is disposed inside the peripheral cold mold plate. A cyclic clean crystalline region is formed between the peripheral cold mold plate and the annular hot preservation layer. A sacrificial crystalline region is formed inside the cyclic hot preservation layer. As the outer race of the annular clean crystallization zone contacts large area of the peripheral low cold mold plate, releasing heat rapidly, while the inner race contacts the annular hot preservation layer 3, heat dissipation is extremely slow, naturally result in forming orientational crystallization.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: August 26, 2014
    Assignee: Xixia Dragon Into Special Material Co., Ltd.
    Inventors: Shucheng Zhu, Xibin Wang, Guochao Cao
  • Patent number: 8256114
    Abstract: A cooling jacket casting core for the production of a cylinder head of an internal combustion engine. The cooling jacket casting core has a slot running at least in part substantially in the direction of a crankshaft longitudinal axis and separating the cooling jacket casting core in at least one section. The slot can run at least in part in an impression of the cooling jacket and can have at least one elevation arranged perpendicular to the longitudinal axis of the cooling jacket casting core.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: September 4, 2012
    Assignee: FEV GmbH
    Inventors: Olaf Hildebrand, André Küsters, Marc Grafen
  • Patent number: 8210234
    Abstract: A cooling chamber design that increases the heat transfer over conventional designs during the casting process of an aluminum cylinder head.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: July 3, 2012
    Assignee: GM Global Technology Operations LLC
    Inventor: David D. Goettsch
  • Patent number: 8187563
    Abstract: A method is provided for producing a Si bulk polycrystal ingot with high quality and high homogeneity, which has no significant crystal defects and is free from diffused impurities with a high yield. An upper face of a Si melt is locally cooled by bringing coolant close to a surface of the Si melt from an upper part of a crucible in the crucible containing the Si melt or by inserting the coolant into the Si melt. A dendrite crystal is formed in the vicinity of the surface of the Si melt. Cooling is performed thereafter while maintaining a proper temperature distribution, and a Si bulk crystal is grown from an upper part toward a lower part using a lower face of the dendrite crystal as a fresh growth face.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: May 29, 2012
    Assignees: Tohoku Technoarch Co., Ltd., Daiichi Kiden Co., Ltd.
    Inventors: Noritaka Usami, Kazuo Nakajima, Isao Takahashi
  • Patent number: 8056607
    Abstract: A method of casting metal articles includes providing a plurality of interconnected support sections. Article mold sections are positioned on the support sections. After article mold cavities, have been filled with a molten metal which is at a first temperature, the support sections and a body of a second molten metal are moved relative to each other while the body of a second molten metal is at a temperature which is less than the first temperature. Space extending between side surfaces of the support sections and between side portions of the article mold sections is filled with the second molten metal during movement between the support sections and the body of a second molten metal. A layer of insulating material may be provided above the body of a second molten metal. A baffle may be provided between a container holding the body of a second molten metal and a furnace assembly.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: November 15, 2011
    Assignee: PCC Airfoils, Inc.
    Inventors: Robert M. Garlock, Gary J. Vanek
  • Patent number: 7797832
    Abstract: A process is provided for manufacturing aluminum vehicle wheels by a casting process that is followed by processing including flow forming and heat treatment steps while one or more risers remain on the cast wheel blank. The process can include directing cooling fluid onto an exposed surface of the casting mold to enhance wheel strength. One-by-one transfer of wheel blanks can be practiced to avoid negative aspects of batch processing.
    Type: Grant
    Filed: September 30, 2006
    Date of Patent: September 21, 2010
    Assignee: Kosei Aluminum Co., Ltd.
    Inventor: Shunkichi Kamiya
  • Publication number: 20090314452
    Abstract: A method of casting metal articles includes providing a plurality of interconnected support sections. Article mold sections are positioned on the support sections. After article mold cavities have been filled with a molten metal which is at a first temperature, the support sections and a body of a second molten metal are moved relative to each other while the body of a second molten metal is at a temperature which is less than the first temperature. Space extending between side surfaces of the support sections and between side portions of the article mold sections is filled with the second molten metal during movement between the support sections and the body of a second molten metal. A layer of insulating material may be provided above the body of a second molten metal. A baffle may be provided between a container holding the body of a second molten metal and a furnace assembly.
    Type: Application
    Filed: June 24, 2008
    Publication date: December 24, 2009
    Inventor: ROBERT M. GARLOCK
  • Patent number: 7377304
    Abstract: Molten metal is injected uniformly into a horizontal mold from a feed chamber in a horizontal or vertical direction at a controlled rate, directly on top of the metal already within the mold. A cooling medium is applied to the bottom surface of the mold, with the type and flow rate of the cooling medium being varied to produce a controlled cooling rate throughout the casting process. The rate of introduction of molten metal and the flow rate of the cooling medium are both controlled to produce a relatively uniform solidification rate within the mold, thereby producing a uniform microstructure throughout the casting, and low stresses throughout the casting.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: May 27, 2008
    Assignee: Alcoa Inc.
    Inventors: Men G. Chu, Ho Yu, Alvaro Giron, Ken Kallaher, Jeffrey J. Shaw
  • Patent number: 6889746
    Abstract: A material for plastic working is produced by the steps of using a mold having a mold cavity (16) partially defined by an end surface of a stopper (13) for closing a molten metal inlet (101), teeming molten metal (10) into the mold cavity through the inlet and cooling the molten metal to thereby attain unidirectional solidification of the molten metal. Regulation of the cooling rate enables the mean grain size to be graded in the direction from the cooled face (B surface) to the opposing face (T surface) and the added components to increase in the same direction. It is possible to obtain a material for plastic working that has a selected portion exhibiting an excellent function.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: May 10, 2005
    Assignee: Showa Denko K.K.
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Tomoo Uchida, Kunio Hirano
  • Patent number: 6446700
    Abstract: A method for shielding a molten metal cooling bath used in directional casting of superalloys from a high temperature furnace environment. A plurality of floating ceramic baffles are used, floated on the top of such cooling bath so as to substantially cover the surface thereof. Each baffle member comprises a hollow ceramic member and ceramic seal means sintered to such hollow member so as to form a hermetically sealed chamber within the hollow member. The baffles are displaced during the directional casting process when a mold containing the cast article is lowered into the cooling bath. A ceramic baffle of this construction is also disclosed.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: September 10, 2002
    Assignee: General Electric Company
    Inventor: Frederic Joseph Klug
  • Patent number: 6443214
    Abstract: A method for heat treating a mold cast product by releasing the product from a mold and hardening the product. Since the mold release is performed when a surface layer of the product held in contact with the mold has a hardening allowing temperature and after it becomes a shell-shaped solidified layer, the product immediately after release from the mold has a heat suitable for hardening. Using this heat, the product is thereafter hardened by means of a cooling agent. As a result, a heating process required for hardening can be omitted, thereby achieving energy conservation.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: September 3, 2002
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Nobuki Matsuo, Toshiaki Ohnuma, Tomotaka Takahashi, Noriyuki Yamada
  • Patent number: 6422294
    Abstract: To obtain a high-quality cast product of a cylinder head, a proper directivity to the cooling process of the molten metal after a pouring process by utilizing the shape of a cylinder head is discussed. In a process where molten metal is injected to a casting mold cavity formed between upper and lower molds to fill it therewith so that the molten metal is solidified to form a cylinder head of an engine, a plurality of core protrusions corresponding to holes (plug holes and bolt holes) are formed in the upper mold, and a cooling means is attached to each of the core protrusions. With respect to cooling means attached to the plurality of core protrusions, those attached to the inner core protrusions comparatively closer to the center of the casting mold are designed so as to have a greater cooling capability than those attached to the outer core protrusions; therefore, with respect to the center portion and the outer portion of the casting mold cavity.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: July 23, 2002
    Assignee: Mazda Motor Corporation
    Inventors: Akira Murata, Akihiro Nakano, Nobuyuki Matsubayashi, Takayuki Shouju, Tomoyuki Nozaki, Shigeo Yano
  • Patent number: 6367538
    Abstract: A mold basket, for supporting a mold, for use in a liquid metal bath furnace with an elevator, comprising a flange for suspending the mold basket from the elevator; and a horizontal plate disposed beneath the flange for supporting the mold, wherein the plate is coupled to the flange with a plurality of vertical tie rods.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: April 9, 2002
    Assignee: General Electric Company
    Inventors: Asish Ghosh, Michael Francis Xavier Gigliotti, Shyh-Chin Huang, Frederic Joseph Klug, Roger John Petterson, Stephen Francis Rutkowski, Paul Steven Svec, Lawrence Donald Graham, Robert Mark Garlock
  • Patent number: 6360809
    Abstract: Disclosed are economical methods and apparatus for high throughput pressure infiltration casting. Methods of the invention use a mold vessel as an evacuation chamber along with an evacuation cap to produce superior quality near-net shape finished cast parts with low porosity. Other methods of the invention use an improved heat transfer technique for directionally solidifying molten infiltrant at an increased rate to increase further the throughput of the pressure infiltration casting cycle. The invention also provides apparatus for practicing methods for high throughput pressure infiltration casting. One embodiment of an apparatus of the invention is a removable evacuation cap, often used in conjunction with a fill tube. Another apparatus embodiment is an evacuation cap coupled to a mold vessel which is used as an evacuation chamber.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: March 26, 2002
    Assignee: Metal Matrix Cast Composites, Inc.
    Inventors: James A. Cornie, Stephen S. Cornie, Ralph P. Mason, Mark A. Ryals
  • Patent number: 6343641
    Abstract: A grain starter capable of nucleating a multiplicity of grains in a casting is positioned within a mold. The mold is filled with molten metal and a solidification interface is caused to pass from the grain starter through the molten metal by immersing the mold in a cooling bath to form a casting that has a multiplicity of grains nucleated by the grain starter.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: February 5, 2002
    Assignee: General Electric Company
    Inventors: Michael Francis Xavier Gigliotti, Jr., Shyh-Chin Huang, Roger John Petterson, Lee Cranford Perocchi
  • Patent number: 6276433
    Abstract: A liquid metal cooled directional solidification process provides improved solidification characteristics at the solidification front. In the process, a mold is filled with molten metal; and a solidification interface is caused to pass through the molten metal by progressively immersing the mold into a cooling liquid. The cooling liquid is a eutectic or near eutectic metal composition. A directional solidification furnace includes a heating furnace, a liquid cooling bath and a mold positioner. The heating furnace has an open bottom end through which a heated mold containing molten metal is lowered from the furnace. The liquid cooling bath comprises a molten eutectic or near eutectic metal composition positioned beneath the open end of the furnace. The mold positioner gradually lowers the heated mold from the furnace, through the open end and immerses the mold into the liquid cooling bath.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: August 21, 2001
    Assignee: General Electric Company
    Inventors: Michael Francis Xavier Gigliotti, Jr., Shyh-Chin Huang, Roger John Petterson, Ji-Cheng Zhao
  • Patent number: 6216764
    Abstract: A cast-on method and its apparatus for joining battery plates to a post in which heat capacity of a mold for forming a post and a strap is less than five times of heat capacity of metals to be introduced in the mold. The mold is made of materials having less linear thermal expansion coefficient preferably less than 18×10−6/° K. The mold may be dipped into calmly flowing molten metal keeping a constant level.
    Type: Grant
    Filed: February 19, 1998
    Date of Patent: April 17, 2001
    Assignees: Yuasa Corporation, Yuasa Engineering, Ltd.
    Inventors: Teruo Goshima, Kazuo Okada
  • Patent number: 6003587
    Abstract: A casting furnace for forming a large size turbine blade at a high casting rate using a casting alloy which has a single crystal structure or a columnar crystal structure, includes a main tank 2 in which a mold M is placed. A heater 6 heats the periphery of a mold M to a predetermined temperature. The heater is then vertically raised relative to the mold M while a cooling liquid metal immerses and cools the periphery of the heated mold M below the heater. The surface height of the cooling liquid metal is raised according to the rising of the heater.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: December 21, 1999
    Assignee: Mitsubishi Materials Corporation
    Inventor: Akira Mitsuhashi
  • Patent number: 5988257
    Abstract: A casting apparatus has within a heating chamber (6) a mold (5) which can be moved out of the heating chamber (6) into a molten cooling metal (10) disposed beneath it. As heat insulation between the heating chamber (6) and the molten cooling metal (10) a thermal insulation layer (13) floating on the molten cooling metal is provided through which the mold (5) dips into the molten cooling metal (10). To prevent clumping within the thermal insulation layer (13) a rake or stirrer (19) is provided, which is driven by a shaker (17) and whisks or stirs the thermal insulation layer.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: November 23, 1999
    Assignee: Ald Vacuum Technologies GmbH
    Inventor: Franz Hugo
  • Patent number: 5913353
    Abstract: A process for casting light metals. The process includes preheating ingots of the light metal in a protective atmosphere before being introduced into a melting furnace wherein the molten metal is degassed and filtered before transference in a heated delivery tube to a covered holding furnace. The filtered melt is made quiescent to reduce its kinetic energy and allow inclusions to settle and form a purified melt. A vacuum is applied to a die cavity in a casting press to displace air residing therein with an inert atmosphere. The purified melt is then transferred in a heated delivery tube as a charge to the casting press under the inert atmosphere to prevent burning and formation of accompanying reaction products. Upon cooling, a light metal casting is produced in the absence of air with minimum defects and inclusions.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: June 22, 1999
    Assignee: Ford Global Technologies, Inc.
    Inventors: James Edward Riley, Curtis Neal Paige
  • Patent number: 5769147
    Abstract: In a metallic ingot used as a forging stock, high dimensional accuracy, small dispersion of weight, good inner quality, and small radius of meniscus are required. In the metallic ingot fulfilling these requirements, the metallic melt 7 is completely filled the mold comprising a sprue 4 closed after pouring of the melt and is forcedly solidified at its bottom by the cooling plate 1. The crystal grains grow almost parallel to the rising direction of the upper surface of the melt 7. The ingot has no cutting surface on the casting surface.
    Type: Grant
    Filed: December 6, 1995
    Date of Patent: June 23, 1998
    Assignee: Showa Denko Kabushikikaisha
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Yoshiaki Sutou, Takayuki Kato
  • Patent number: 5578177
    Abstract: Methods of manufacturing fully annealed metal anodes are disclosed. The methods contemplate supplying metal and heating the metal until it has obtained a molten state. The molten metal is permitted to flow into a die and transported therethrough where it is cooled until it solidifies. The flow rate of the metal through the die and the extent of cooling are selected such that a fully annealed metal anode is obtained.
    Type: Grant
    Filed: October 23, 1995
    Date of Patent: November 26, 1996
    Assignee: RFE Industries, Inc.
    Inventor: Gary A. Wolf
  • Patent number: 5568833
    Abstract: A method of casting a turbine wheel of a metal alloy, wherein there is generated a columnar grain structure parallel to the leading and trailing edges of the vanes, by directional solidification of the metal from the central aperture in the wheel outward to the vane tips. A form with cavity to receive therein the molten metal has a thin walled core in the center, with the core wall outer surface in place to provide one wall of the cavity. A heat transfer medium in fluid form is circulated through the core, thereby cooling the poured metal by heat transfer from the inner ends of the vanes outward to the tips.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 29, 1996
    Assignee: Allison Engine Company, Inc.
    Inventor: Donald J. Frasier
  • Patent number: 5527101
    Abstract: A cast aluminum alloy vehicle wheel has a central disk, a rim, and a rim carrying portion located between the rim and the central disk. The rim has an end or tip portion that is the farthest portion of the rim from the disk, and a barrel portion is located between the rim carrying portion and the rim end. The microstructure of the metal provides a dendritic arm spacing (DAS) that is smaller at the rim end than at the rim barrel. Additionally, the DAS of the barrel portion is less then at the central disk. The DAS of the rim carrying portion is equal or less then the DAS of the barrel portion on the rim. A high strength wheel is provided, especially at the rim.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: June 18, 1996
    Assignee: Asahi Katantetsu Kabushiki Kaisha
    Inventors: Takashi Kato, Masami Yamamoto, Masaru Kurebayashi, Masaaki Uruma, Hisao Totsuka
  • Patent number: 5477906
    Abstract: A mould assembly comprising mould segments of generally non-thermally conductive material which define a mould cavity is upwardly filled with liquid metal through at least one in-gate. A thermal extraction member of a high thermally conductive material contacts a portion of the mould cavity through which heat is extracted rapidly to establish positive thermal gradients in the casting and thereby promote directional solidification. The mould assembly is also provided with a seal to selectively isolate the mould assembly from the liquid metal source to allow the mould assembly to be removed from the casting station and transferred to the cooling station, providing a more efficient use of the casting station. In addition, once a shell has solidified then the mould segments and metal contained therein can be transferred to the cooling station.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: December 26, 1995
    Assignee: Comalco Aluminum Limited
    Inventors: Rodney A. Legge, John A. Eady, Rodney E. Proposch, Joseph R. Ponteri
  • Patent number: 5421397
    Abstract: An improved method of and system for die casting an engine block made of aluminum is provided. Included in the system is a calorific fluid for circulating through a bore pin assembly in a preselected temperature range which is continuously maintained by a heat transfer fluid controlling device.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: June 6, 1995
    Inventors: Robert K. Hembree, Mark L. Purtee
  • Patent number: 5316070
    Abstract: Al base - Si hypereutetic alloys can exhibit problems of variable and unwanted microstructure throughout the section of the article being cast. This problem is overcome by controlled cooling of the mold in critical areas, to remove or prevent excessive accumulation of heat energy and avoid the formation of intense convection currents in still molten alloy. Consequently, the necessary coupled growth of the Al-Si eutectic is promoted and the resultant microstructure is substantially free of primary Si. The 3HA and modified 3HA alloys of the applicant are considered on the basis of their wear resistance and improved machineability for automotive applications, such as engine blocks and cylinder heads. A first feature of the controlled cooling procedure is supply of coolant to regions in the mold, above and extending from the gate, such that solidification progresses uniformly from the remote regions of the mold spaces towards the gate to give a substantially uniform microstructure throughout the casting.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: May 31, 1994
    Assignee: Comalco Aluminum Limited
    Inventors: Kevin P. Rogers, Christopher J. Heathcock
  • Patent number: 5078200
    Abstract: Aluminothermically produced steel is poured into a casting mold which surrounds the two rail ends. A cooling agent is applied to the surfaces of the rail heads of the rail portions adjacent the two casting mold halves. The cooling agent is applied after the molten steel has been poured into the casting mold until the steel has solidified. The cooling agent may be applied until the projecting material and the casting mold halves has been sheared off. A casting mold for carrying out the method includes two casting mold halves which each has a groove for receiving a sealing paste in the inner surfaces thereof facing the rail ends, wherein the groove extends along the outer contour of the casting mold halves.
    Type: Grant
    Filed: February 6, 1991
    Date of Patent: January 7, 1992
    Assignee: Elektro-Thermit GmbH
    Inventors: Hans Guntermann, Frank Kuster
  • Patent number: 5058655
    Abstract: A method of manufacturing a thick-walled container casting of a cast iron with a spheroidal graphite comprises forming an inflexible mold spaced between an inner cylindrical dead mold core and an outer mold arranged over the dead mold core, filling the mold space through a gate from an end thereof while cooling particularly the inner mold surface of the mold ajacent the dead mold over the amount of a cooling of a usual sand casting, and dimensioning the gate so that the cast iron solidifies in the gate before the eutectic solidification of the casting sets in. The device comprises an inner cylindrical dead bolt core which has a bottom end and a closed top end and an outer cylindrical mold positioned over the inner core with its top spaced from the top end of the inner dead mold core. The bottom open ends of the inner and outer cylindrical molds are closed by means which define a mold filling closure having a gate dimensioned so that the filling of the mold will effect first the solidification in the gates.
    Type: Grant
    Filed: March 19, 1986
    Date of Patent: October 22, 1991
    Assignees: Thyssen Industrie AG, Transnuklear GmbH
    Inventors: Helmut Derp, Horst Keese, Elmar Schlich
  • Patent number: 4959013
    Abstract: A self-contained apparatus which includes a liquid reservoir and a liquid supply conduit and a liquid return conduit to the reservoir. The liquid is to be supplied to an exterior structure for changing the temperature of the exterior structure. The reservoir is to be removable from the apparatus to facilitate filling of the reservoir.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: September 25, 1990
    Assignee: Sol Gingi-Pak, A Division of Belport Co., Inc.
    Inventor: Fred W. Reynolds
  • Patent number: 4759399
    Abstract: Hollow metal ingots are produced by a hollow metal manufacturing apparatus comprising a mold placed on a stool, and a cylindrical metallic cooling core placed in the mold to form an annular casting space therebetween. During the casting, a cooling fluid is directly blown upon the inner surface of the core while the cylindrical metallic core is allowed to be buckled. The cooling core is constituted by an outermost metallic cylinder to be brought into contact with a molten metal, a cylindrical lattice-fashioned buckling-adjusting frame positioned in the metallic cylinder and provides passages through which the cooling fluid is passed, and a cooling fluid vessel which is positioned inside the buckling-adjusting frame and is provided with a number of cooling fluid blowing nozzles.
    Type: Grant
    Filed: May 7, 1987
    Date of Patent: July 26, 1988
    Assignee: Kawasaki Steel Corporation
    Inventors: Kenji Saito, Yukio Oguchi, Toshio Kato, Hideshi Ohzu, Kanji Aizawa, Minoru Yao
  • Patent number: 4644996
    Abstract: An inclining molten metal charging apparatus for forced cooling casting which includes a fixed frame; an inclining frame pivotally supported by the fixed frame and reciprocatingly inclined at a predetermined angle; a stool having positioned on and fitted thereon a casting mold, a plurality chillers used for directional solidification and a tubular member internally chilled as a functional component such as a bolt fastening hole in a resulting casting; a stool support mechanism for carrying the stool into and out from a space defined by the inclining frame; a clamp mechanism for having a function of clamping the stool at a predetermined position inside the space, and equipped with a push member for pushing the casting mold to the stool when the clamp mechanism effects clamping; a molten metal vessel receiving a molten metal at the end of the forward stroke of the inclining frame and completing the charge of the molten metal into the casting mold at the end of the returning stroke; a cooling nozzle fitted to th
    Type: Grant
    Filed: January 14, 1986
    Date of Patent: February 24, 1987
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroshi Kawai, Yukio Ohtsuka, Kuniaki Mizuno
  • Patent number: 4585047
    Abstract: An apparatus for cooling the molten metal in a mold in order to cause directional solidification. The apparatus includes a pipe extending into a mold cavity, which is defined by a space between mold pieces, with cooling fluid flowing therethrough.
    Type: Grant
    Filed: February 1, 1984
    Date of Patent: April 29, 1986
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroshi Kawai, Yukio Ootsuka
  • Patent number: 4487247
    Abstract: A thin walled chill mould is provided with several cooling chambers by which the intensity of cooling can be varied during casting. During pouring, cooling of the lowermost chamber is commenced first and with low intensity. As filling continues, cooling by the other cooling chambers is commenced successively and at increasing intensities. After filling is complete, cooling is continued at these different intensities until the mould has been closed and tilted to the horizontal. Thereafter cooling is continued at maximum intensity in all chambers while the mould is rotated about its longitudinal axis. The method and the chill mould are provided particularly for the manufacture of long, slender ingots, billets or the like, particularly for the manufacture of seamless tubes. Corresponding control of the cooling operation avoids fissures and facilitates ejection of the ingot from the chill mould.
    Type: Grant
    Filed: July 30, 1982
    Date of Patent: December 11, 1984
    Assignee: Kocks Technik GmbH & Co.
    Inventors: Heinrich Faste, Ali Bindernagel
  • Patent number: 4210193
    Abstract: An aluminium-silicon alloy casting in which zones formed so as to have a particularly fine-grained structure are cooled by way of individual thin-walled mould wall portions, which are prevented from dissolving completely by the melt and are intermetallically bonded to the casting and are detachable from the finished casting only in a destructive manner.
    Type: Grant
    Filed: May 12, 1978
    Date of Patent: July 1, 1980
    Assignee: Mahle GmbH
    Inventor: Martin Ruhle
  • Patent number: 4191238
    Abstract: The invention relates to a method and mould for the production of a connecting rod or similar object having a body of cast metal, expecially a non-ferrous metal such as a zinc or aluminum alloy, the body comprising a connecting rod shank and of which at least one connecting rod end is provided with a bearing race element of hardened steel, typically an outer race for a roller or needle bearing. The invention particularly pertains to connecting rods having bearing surfaces subject to high loads and which are characterized by the absence of "pockets" in which contaminated lubricant might accumulate. Such connecting rods are, for instance, used in two-stroke combustion engines as for instance outboard motors for boats or the like, with rollers or needles disposed between the said outer race and the journal of the crank shaft throw.
    Type: Grant
    Filed: April 15, 1977
    Date of Patent: March 4, 1980
    Assignee: AB Volvo Penta
    Inventor: Heinz Pichl
  • Patent number: 4175609
    Abstract: Disclosed are a method and apparatus for molding articles in which a highly planar solidification front is desired. A charge of liquefied alloy to be molded into the desired article is placed in a mold and submerged in a heat-exchange bath of liquid metal forming a cylindrical column which is heated in an upper portion and cooled in a lower portion to define an intermediate level at which the bath temperature corresponds to the melting point of the alloy. Upon a progressive lowering of the mold within the bath, a solidification front formed in the alloy at that intermediate level advances from the bottom to the top of the charge.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: November 27, 1979
    Assignee: O.N.E.R.A. - Office National d'Etudes et de Recherches Aerospatiales
    Inventors: Maurice El Gammal, Maurice Rabinovitch
  • Patent number: 4162700
    Abstract: This disclosure covers a process and mechanisms for controlling the temperature and heat balance of molds. More particularly, this invention relates to molds with built-in devices for heating and cooling various regions within molds. These devices are so constructed that each device is capable of heating and cooling independent of the other devices. The intensity of heating and cooling of these devices can be varied by regulating the flow of the heating/cooling medium in impulses for variable intervals of time. Prior to filling of the mold, the mold is heated to the desired working temperature by injecting a heated medium into the various heating/cooling devices. During or immediately after filling the mold, the flow of the heated medium to the device furthest from the casting riser (feeder) is discontinued and is replaced by a flow of cooling medium. When the material within the mold in the immediate vicinity of this device is solidified, the flow of cooling medium to this device is decreased or stopped.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: July 31, 1979
    Inventor: Friedhelm Kahn
  • Patent number: 4157728
    Abstract: A direct chill casting of metals, particularly hot top casting of aluminum and its alloy, is improved by applying a gas pressure to the metals from directly below the overhang of a feed reservoir for receiving a melt to be cast.The direct chill casting is further improved by supplying a lubricating oil from a slit for conveying the gas to the inner wall of the mold.By using the process and the apparatus according to the invention, ingots having excellent smooth surfaces and reduced segregation can be reliably produced with a reduction in the amount of the lubricating oil used.
    Type: Grant
    Filed: July 29, 1977
    Date of Patent: June 12, 1979
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Ryota Mitamura, Tadanao Itoh
  • Patent number: 4100960
    Abstract: Method and apparatus for casting a metal article in a mold at least as long as the article, utilizing a cooled mold of elongated form having top and bottom portions. The method includes the steps of introducing molten metal from a source through the bottom portion of the mold, flowing molten metal into the mold so as to form a solidifying casting shell which during casting occupies at least 40% of the cross-sectional mold area and has a molten core, and flowing molten metal from the source through the core towards the mold top.
    Type: Grant
    Filed: January 28, 1977
    Date of Patent: July 18, 1978
    Assignee: Technicon Instruments Corporation
    Inventor: Leonard Watts
  • Patent number: 4045536
    Abstract: Disclosed is a method of preparing castings of bismuth, silicon and silicon alloys characterized by solidification expansion by cooling the molten material below its melting point to form a casting of the material within a suitable container. According to the disclosed method, a tapered liquid core with the smaller end downward and the larger end upward and a portion of the top of the casting, i.e., a liquid pool on top of the casting, are maintained in a molten state and in liquid communication with each other until the casting is substantially solidified, for example, by keeping the liquid pool on top molten by insulation or by heat addition or by both insulation and heat addition. Thereafter, the core and the top are allowed to solidify, providing a casting substantially free of defects.
    Type: Grant
    Filed: July 8, 1975
    Date of Patent: August 30, 1977
    Assignee: PPG Industries, Inc.
    Inventor: John F. Wallace
  • Patent number: 3991811
    Abstract: A light alloy piston having an annular cooling passage in its head portion is prepared by a process wherein a permanent mold, preferably having a steel shell and a water cooled bottom, is filled with the molten piston alloy. Thereafter, core elements, particularly a salt core for forming the cooling passage are introduced into the molten material by means of a holder and the permanent mold is held at an elevated temperature by external heating. The permanent mold is then lowered into a water bath for a given period of time. The soluble core, which has a specific gravity lower than that of the molten light alloy, is forced into the molten material to the desired position and depth using a holding device. The holding device is withdrawn from the remaining molten material when the solidification of the molten material has proceeded to the underside of the core.
    Type: Grant
    Filed: January 15, 1975
    Date of Patent: November 16, 1976
    Assignee: Karl Schmidt GmbH
    Inventors: Adolf Diez, Manfred Stark, Kurt Anderko