WO2004014581A2 - Procedes et appareil de traitement a chaud et d'elimination du sable pour pieces moulees - Google Patents

Procedes et appareil de traitement a chaud et d'elimination du sable pour pieces moulees Download PDF

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Publication number
WO2004014581A2
WO2004014581A2 PCT/US2003/024928 US0324928W WO2004014581A2 WO 2004014581 A2 WO2004014581 A2 WO 2004014581A2 US 0324928 W US0324928 W US 0324928W WO 2004014581 A2 WO2004014581 A2 WO 2004014581A2
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WO
WIPO (PCT)
Prior art keywords
castings
casting
heat treatment
core
mold
Prior art date
Application number
PCT/US2003/024928
Other languages
English (en)
Other versions
WO2004014581A3 (fr
Inventor
Scott P. Crafton
Paul M. Crafton
Volker R. Knobloch
James L. Lewis, Jr.
Ian French
Franz Ruegg
Original Assignee
Consolidated Engineering Company, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Consolidated Engineering Company, Inc. filed Critical Consolidated Engineering Company, Inc.
Priority to EP03785083A priority Critical patent/EP1575722A2/fr
Priority to JP2004527921A priority patent/JP2006504531A/ja
Priority to MXPA05001393A priority patent/MXPA05001393A/es
Priority to CA002495514A priority patent/CA2495514C/fr
Priority to AU2003259701A priority patent/AU2003259701B2/en
Publication of WO2004014581A2 publication Critical patent/WO2004014581A2/fr
Publication of WO2004014581A3 publication Critical patent/WO2004014581A3/fr
Priority to HK06107872A priority patent/HK1087664A1/xx

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/002—Removing cores by leaching, washing or dissolving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/003—Removing cores using heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/006—Removing cores by abrasive, water or air blasting

Definitions

  • This invention generally relates to metallurgical casting processes, and more specifically to a method and apparatus for removal of a sand core from a casting and the heat treatment of the casting.
  • a traditional casting process for forming metal castings employs one of various types of molds for example, a green sand mold, a precision sand mold, or a steel die, having the exterior features of a desired casting, such as a cylinder head or engine block, formed on its interior surfaces.
  • a sand core comprised of sand and a suitable binder material and defining the interior features of the casting is placed within the mold or die.
  • Sand cores generally are used to produce contours and interior features within the metal castings, and the removal and reclaiming of the sand materials of the cores from the castings after the casting process is completed is a necessity.
  • the binder for the sand core and/or sand mold may comprise a phenolic resin binder, a phenolic urethane "cold box” binder, or other suitable organic binder material.
  • the mold or die is then filled with a molten metallic alloy.
  • the casting generally is removed from the mold or die and may be then moved to a treatment furnace(s) for heat-treating, reclamation of the sand from the sand cores, and, at times, aging.
  • Heat treating and aging are processes that condition metallic alloys so that they will be provided with different physical properties suited for different applications.
  • a first step separates portions of sand core from the casting.
  • the sand core is typically separated from the casting by one or a combination of means. For example, sand may be chiseled away from the casting or the casting may be physically shaken or vibrated to break-up the sand core and remove the sand.
  • heat treating and aging of the casting generally are carried out in subsequent steps.
  • the casting is typically heat treated if it is desirable to, among other treatments, strengthen or harden the casting or to relieve internal stresses in the casting.
  • An additional step consists of purifying the sand that was separated from the casting, including burning the binder that coats the sand, abrading the sand, and passing portions of the sand through screens. Therefore, portions of sand may be re-subjected to reclaiming processes until sufficiently pure sand is reclaimed.
  • the present invention comprises a system and method for heat treating castings, such as for use in a metallurgical plant, and for removing the sand cores used during the casting processes.
  • the present invention encompasses multiple embodiments for efficiently removing and reclaiming the sand of sand cores using fluid streams comprising one or more fluids that degrade the cores.
  • the cores comprise binder materials that can be soluble in one or more fluids contained in the fluid streams used in the process and directed at or into the castings. When the cores are exposed to the fluid, the binder tends to dissolve and the core degrades.
  • a molten material such as aluminum or other metal
  • the temperature of the molds or dies can be adjusted, either by heating or cooling, prior to the pouring of the molten material therein in order to make the casting process more efficient.
  • the molds or dies may be preheated to maintain the temperature of the metal close to a heat treatment temperature as the castings are formed in the molds.
  • the castings are then removed from their molds and are each placed in a pre-defined position on a saddle that has known x, y and z coordinates.
  • Each saddle generally is configured to receive one or more castings in a fixed orientation or position with the x, y, and z coordinates of each casting located in a known, indexed position or orientation so that the core apertures of the castings formed by the sand cores are oriented or aligned in known, indexed positions.
  • the saddles further can include locating devices to guide and help maintain the castings in their desired, Icnown indexed position.
  • Each saddle, with at least one casting positioned therein, is moved through a heat treatment furnace or chamber of a heat treatment station for heat treatment and core removal, and also potentially the reclamation of the sand cores.
  • a series of nozzles with x, y and z coordinates that are fixed or aligned with the position of castings direct streams of one or more fluids, such as steam, water, air, oils, organic solvents and combinations thereof, onto and into the castings.
  • the fluid flows tend to degrade, dislodge and aid in removal of the sand of the sand cores from the internal cavities of the castings as the sand cores are broken down in the heat treatment station, in part by dissolving the binder which can be soluble in one or more components of the fluid stream.
  • the nozzles are arranged in a series of nozzle stations positioned sequentially through the heat treatment chamber, with the nozzles of each nozzle station oriented in a pre-defined arrangement corresponding to the Icnown positions of the core apertures of the castings, and each nozzle assembly can be controlled remotely through a control system or station.
  • the castings can be left in their molds or dies for "in-die” or "in-mold” heat treatment of the castings.
  • the molds or dies typically are pre-heated before the molten metal of the castings is poured into them to maintain the metal close to a heat treatment temperature for the castings, so as to at least partially heat treat the castings inside the dies while and after the castings solidify.
  • the molds or dies, with their castings therein typically are located or placed in indexed orientations or positions with their x, y and z coordinates Icnown for pre-heating and/or heat treating of the castings therein and removal of the sand cores.
  • the castings and sometimes the molds or dies generally are passed tlirough a heat treatment furnace of a heat treatment station.
  • the heat treatment station further includes a plurality of nozzle stations each having a series of nozzles oriented or positioned in a pre-defined manner corresponding to the Icnown positions of the molds or dies and castings for applying high pressure fluids thereto.
  • the nozzle stations also can include robotically operated nozzles that move along a pre-defined path around the molds or dies, into various application positions corresponding to the positions or orientations of access openings or apertures in the molds or dies for access to the castings for dislodging the sand cores from the castings.
  • the heat treatment station also can include alternative energy sources, such as inductive or radiant energy sources, or a heated oxygen chamber or a heated fluidized bed, for supplying energy to the dies or mold packs to raise their temperature for heat treating the castings therewithin. Thereafter, the castings are removed from their molds or dies and are passed through subsequent core removal stations or processes to further remove and potentially reclaim the sand cores from the castings.
  • the molds or dies are pre-heated to a pre-defined temperature. Thereafter, as molten metal is poured into the dies, the dies continue to be heated to heat treat castings as they are solidified without removing the castings from the dies. The dies can then be transferred to a quenching station for quenching of the castings and removal of the sand cores therefrom.
  • the dies generally are maintained in a Icnown, fixed position or orientation at or adjacent the pouring station. The dies are heated by the application of heated fluids from a series of nozzles positioned about the dies, typically in alignment with die access openings thereof.
  • the nozzles further are subsequently moved about the dies between a series of nozzle positions set according to the position or orientation of the dies, for heating the dies to heat treat the castings within the dies.
  • the mold or die may be placed, at least partially, in a temperature-controlled fluid bed for heating or otherwise controlling the mold or die temperature for heat treating the castings and possibly accomplishing other purposes.
  • the casting is pre-heated, either within the mold or with the mold removed, at a pre-heating station in order to adjust the temperature of the casting to approach or reach the appropriate heat treatment temperature range prior to actual heat treatment.
  • One or more fluid streams can be directed at or into the casting during pre-heating or at the pre-heating station in order to heat the casting and/or degrade the core contained therein.
  • the casting may be placed in an indexed position with the fluid stream(s) being supplied from one or more nozzles adjusted to direct the fluid streams at or into the casting.
  • the casting is then transferred to a heat treatment station for heat treating and onto further processing.
  • Fig. 1 is a schematic illustration of a first embodiment of the present invention.
  • Fig. 2 is a side elevational view illustrating introduction of molten metal into a mold.
  • Fig. 3 is a perspective view illustrating the positioning of castings within a saddle.
  • Fig. 4 is a schematic illustration of a further embodiment of the present invention for in-mold heat treating with core removal.
  • Figs. 5A-5B are side elevational views illustrating movement of the nozzles to various application positions about a mold or die for in-mold heat treatment and/or core degrading.
  • Fig. 6 is a side elevational view schematically illustrating an alternative embodiment of a heating chamber for in-mold heat treatment of castings.
  • Fig. 7 is a side elevational view schematically illustrating another alternative embodiment of a heating chamber for in-mold heat treatment of castings.
  • Figs. 8A - 8C are side elevational views schematically illustrating further alternative embodiments of heating chambers for in-mold heat treatment of castings.
  • Fig. 9 illustrates an additional embodiment of a heat treatment unit including the various embodiments of heating chambers shown in Figs. 6 - 8C, positioned in series.
  • Fig. 10A is a schematic illustration of a further embodiment of the present invention for processing metal castings.
  • Fig. 1 OB is a side elevational view of the heat treatment line of the embodiment of the present invention of Fig. 10A.
  • Fig. 1 generally illustrates a metallurgical casting process 10. Casting processes are well Icnown to those skilled in the art, and a traditional casting process will be described only briefly for reference purposes. It further will be understood by those skilled in the art that the present invention can be used with any type of casting process, including the formation of castings formed from aluminum, iron and various other types of metals and/or metal alloys.
  • a molten metal or metallic alloy M is poured into a mold or die 11 at a pouring or casting station 12 for forming a casting 13 (Fig. 3) such a cylinder head or an automobile engine block.
  • a casting 13 Fig. 3
  • casting cores are received or placed within the molds or dies so as to create hollow cavities and/or casting details or core prints within the castings being formed therewithin.
  • Each of the molds or dies 11 typically can be a permanent mold/die and can be formed from a metal such as cast iron, steel or other materials and having a clam-shell style design for ease of opening and removal of the castings therefrom.
  • the molds also can include "precision sand mold” type molds generally formed from a granular material, such as silica, zircon or other sands, mixed with a binder.
  • the binder is formed of a material that is soluble in one or more fluids, such as water, steam, organic solvents and the like.
  • the binder may be formed of casting salts, containing a significant amount of soda ash, which are soluble in water and steam, phenolic resins, phenolic urethane "cold box” binder materials, or other suitable organic binder material, which are soluble in certain organic solvents and/or are thermally degradable.
  • the molds and dies also may be semi-permanent sand molds having an outer mold wall formed from a sand and binder, a metal such as steel or a combination or both types of materials, or can include investment type castings/dies.
  • molds will hereafter be used to generally refer to both permanent metal molds and sand type molds, except where a particular type of die or mold is specifically indicated. It further will be understood that the various embodiments of the present invention disclosed herein can be used for processing castings in permanent or metal dies, precision sand type molds, semi-permanent molds, and/or investment casting molds, depending on the application.
  • each mold 11 generally includes a series of sidewalls 14, a top or upper wall 16, and lower wall or bottom 17, which define an internal cavity 18 within which the molten metal M is received.
  • the internal cavity 18 generally is formed with a relief pattern for forming the internal features of the castings 13 to be formed within the molds so as to define the shape or configuration of the finished castings.
  • a pour opening 19 generally is formed in the upper wall or top 16 of each mold and communicates with internal cavity 18 to enable the molten metal M to be poured or otherwise introduced into the mold as indicated in Figs. 1 and 2.
  • the resultant casting has the features of the internal cavity of the mold, with additional core apertures or access openings 21 also being formed therein where the sand cores are positioned within the molds.
  • a heating source or element such as a heated air blower or other suitable gas-fired or electric heater mechanism, or fluidized bed, 22 also generally is provided adjacent the pouring station 12 for preheating the molds 11.
  • the molds are preheated to a desired temperature depending upon the metal or alloy used to form the casting. For example, for aluminum, the molds would be preheated to a range of approximately 400 - 600°C.
  • Other varying preheating temperatures generally will be required for preheating various different metallic alloys or metals for forming the castings are well Icnown to those skilled in the art and can include a wide range of temperatures above and below 400 - 600°C.
  • some mold types may require lower process temperatures to prevent mold deterioration during pouring and solidification. In such cases, such where the metal processing temperatures are required to be higher, a suitable metal temperature control method, such as radiant or induction heating, can be employed to accomplish the process specified herein.
  • the molds can be provided with internal heating sources or elements for heating the molds.
  • the dies can include cavities or passages formed adjacent the casting and in which a heated fluid medium such as a thermal oil is received and/or circulated through the dies for heating the dies. Thereafter, thermal oils or other suitable media can be introduced and/or circulated through the dies, with the oil being of a lower temperature, for example 250°C - 300°C, to cool the castings and cause the castings to solidify.
  • a higher temperature thermal oil for example, heated to approximately 500°C - 550°C, then typically will be introduced and/or circulated through the dies to arrest the cooling and raise the temperature of the castings back to a soak temperature for heat treating the castings in their dies.
  • the preheating of the dies and/or introduction of heated media into the dies causes the dies to function as heat treatment units and helps maintain the metal of the castings at or near a heat treatment temperature so as to minimize heat loss as the molten metal is poured and solidifies in the dies and thereafter are transferred to a subsequent processing station for heat treatment. As indicated in Fig.
  • the mold and casting generally are removed from the pouring station 12 by a mold transfer mechanism 25, and are transferred to a loading station 26.
  • the mold transfer mechanism can include a die transfer robot (not shown), winch or other type of conventionally Icnown transfer mechanism for moving the molds from the pouring station to the loading station located in close proximity to the pouring station.
  • the casting 13 (Fig. 3) is removed from its mold 11 prior to or at the loading station 26 (Fig.
  • the core apertures 21 (Fig. 3) of the castings likewise are oriented or aligned in Icnown positions for removal of the sand cores from the castings.
  • each saddle generally is a basket or carrier typically formed from a metal material and having a base 28 and a series of side walls 29 so as to define an open casting chamber or receptacle 31 in which one or more castings 13 are received with the core apertures or access openings thereof exposed.
  • the castings are generally fixed in their Icnown indexed or registered orientation or position when placed within the receptacle 31 of their saddle 27.
  • the saddles further can be of a variety of sizes to accommodate multiple castings therein for transport, with each of the castings contained therein being maintained in a predefined, indexed position as indicated in Fig. 3.
  • the saddles 27 can further include locating devices 32 mounted to the base and/or walls 28 and 29 of each saddle for guiding and maintaining the castings into their desired, indexed positions within the saddles 27.
  • the locating devices can include guide pins 33, such as shown in Fig. 3, or can include notches or grooves, such as indicated by dashed lines 34 in Fig. 3 or other, similar devices for guiding or directing the castings into a desired indexed position or orientation.
  • the guide pins 33 will be formed from a metal material such as cast iron or similar material having a high heat resistance, and are mounted to the base or any of the sidewalls of the saddle.
  • Corresponding locator or guide openings 36 (shown in dashed lines) generally are formed in the casting during the casting process, such as by the use of guide pins mounted to the bottom or side walls of the molds, or through the use of degradable sand core-type materials.
  • the guide pins are received within the corresponding guide openings of the castings so as to locate and maintain the castings in their desired, indexed positions having known, defined x, y and z coordinates, with the positions of the core access openings of the castings likewise oriented or aligned at Icnown positions to enable more efficient and direct application of heat to the sand cores within the castings to enhance the dislodging and removal of the sand material for reclamation.
  • the molds may include a steel or iron "chill" or insert having various design features of the casting imparted thereon for improved grain structure of the casting.
  • chills can be either removed after pouring or can be left with and remain part of the casting upon solidification of the molten metal of the casting.
  • the chills, if left in the casting, also can be used as locating devices to enable the castings to be located within their saddles in their desired alignment or position.
  • the features or detail left by the removal of the chill can also act as a locating point for engagement of a guide pin or other locating device within the saddle so as to hold each casting in its desired, indexed position.
  • the castings are then moved in their saddles into and through a heat treatment station 40 for heat treatment, core removal and sand reclamation if desired.
  • the saddles are generally conveyed or moved through the heat treatment station on a conveyor or rails so that the castings are maintained in their Icnown indexed positions as they are moved through the heat treatment station.
  • the heat treatment station 40 generally includes a heat treatment furnace, such as a gas fired furnace, and generally includes a series of treatment zones or chambers for heat treating each casting and removal and reclamation of the sand material of the sand cores.
  • Such heat treatment zones can include various types of heating environments such as conduction, including the use of fluidized beds, and convection, such as using heated air flows.
  • Other heating chambers or application means could include induction and radient heating heating environments.
  • the number of treatment zones and/or environments can be divided into as many or as few number of zones as the individual applications may require to heat treat and remove the sand cores therefrom, and each casting typically is kept inside its mold until a saddle is available to move it through a heat treatment station. It is further possible to additionally age the castings within the heat treatment station 40 if so desired.
  • the heat treatment station 40 includes a heat and/or fluid source or element 41, here illustrated as including a series of nozzle stations 42 positioned at spaced intervals along the length of the heat treatment station to enhance the heat treatment and sand core removal from the castings.
  • the number of nozzle stations positioned along the heat treatment station can vary as needed, depending upon the core print or design of the casting.
  • Each of the nozzle stations or assemblies 42 includes a series of nozzles 43, mounted and oriented at known or registered positions corresponding to the known, indexed positions of the castings being passed therethrough in their saddles.
  • the number of nozzles in each nozzle station is variable, depending upon the core prints of the castings, such that different types of castings having differing core prints can utilize an optionally different arrangement or number of nozzles per nozzle station.
  • the nozzles typically are controlled through a control system that can be operated remotely so as to engage or disengage various ones of the nozzles at the different nozzle stations as needed, depending upon the design or core prints of the castings passing through the heat treatment station.
  • Each nozzle 43 generally is mounted in a predetermined position and/or orientation, aligned with one of the core apertures or access openings or core prints or a set of core apertures formed in the castings according to the Icnown, indexed positions or orientations of the castings within the saddles.
  • Each of the nozzles is supplied with a fluid media, typically under high pressure and heated, which includes one or more components in which one or more components of the core are soluble.
  • the fluid media used may include air, water, steam, thermal oils, other organic solvents and mixtures thereof.
  • the fluids are directed at the core openings under high pressure, so as to develop relatively high fluid velocities, typically approximately 1,000 FPM to approximately 15,000 FPM, although greater or lesser velocities and thus pressures also can be used as required for the particular casting application.
  • the pressurized fluid flows, streams or blasts applied to the castings by the nozzles tend to impact or contact the cores within the castings and help heat treat the castings and cause the binder materials of the sand cores to at least partially dissolve, degrade or otherwise break down.
  • the core binder materials When the core binder materials are exposed to fluid in which it is soluble, it begins to dissolve in the fluid. Dissolution of the binder causes the chemical bonds linking the binder molecules to each other and to the filler particles to break down.
  • the sand of the sand cores tends to be removed or cleaned from the castings through the core apertures or access openings with the passage of the fluid flows through the castings for recovery and reclamation of the sand.
  • the nozzles 43 of each nozzle assembly or station 42 further can be adjusted to different nozzle positions depending upon the characteristics of the castings and the pressure of the fluid flows or blasts can also be adjusted.
  • the adjustment of the nozzles can be accomplished remotely, such as through the use of robotically movable or positionable nozzles.
  • the fluids from the nozzles also can be applied at different temperatures, depending upon which zones within the heat treatment station of the nozzles from which they are dispensed are located, so that the fluid flows will not interfere negatively with the heat treatment process for the castings as they are moved through the heat treatment furnace or station.
  • each nozzle station can be moved between various nozzle positions including moving between a rest position and an application position, or between several application positions, oriented toward and/or aligned with the core apertures or access openings upon movement of the castings into different zones or stations within the heat treatment station so as to strategically direct high pressure flows of a heated fluid media toward the different core apertures or access openings to cause the sand cores and/or sand molds to be broken up and dislodged from the castings for removal of the sand cores therefrom.
  • the use of the nozzle stations within the heat treatment furnace or station enhances and enables a more efficient breakdown and removal of the sand cores from each casting during heat treatment of the castings, and can assist in the reclamation of the sand materials from the sand cores for reuse.
  • each casting is removed from the heat treatment station 40 and typically is moved into a quenching station 45.
  • the quenching station 45 typically includes a quench tank filled with a cooling fluid, such as water or other Icnown material in which each casting is immersed for cooling and quenching.
  • the capacity and size of the quench tank generally is a function of the castings being formed and the specific heat of the metal or metal alloy comprising the castings and the temperatures to which each casting has been heated.
  • the quenching station can include one or a series of nozzles for applying cooling fluid to the castings for quenching and/or further binder degradation and core removal.
  • FIG. 4 An additional embodiment of the present invention illustrating the in-mold heat treatment of castings is illustrated in Figs. 4 - 8B.
  • a molten metal or alloy M is poured into a die or mold 51 at a pouring or casting station 52.
  • the dies/molds, 51 in this embodiment typically include permanent or semipermanent dies formed from a metal such as cast iron, steel, or similar material (Figs. 4 - 5B) or can be sand or precision sand molds formed from a sand material mixed with an organic binder as is known in the art.
  • molds are made for investment casting in which the mold is comprised of a ceramic coating shaped by a pattern.
  • the molds generally include side sections or shells defining an internal chamber 53 within the dies and in which the molten metal is received for forming castings 54.
  • Each of the molds 51 further generally includes a sand core 55, as illustrated in Fig. 4, generally formed from a sand material mixed with an organic binder for forming bores and or core apertures or access openings in the castings formed within the molds and for creating casting details or core prints.
  • the dies or sand molds 51 in this embodiment further typically include ports or access openings 56 (Fig.
  • a heating source or element such as a heated air blower, fluid nozzle, fluid bed, or other suitable gas-fired or electric heater mechanism 58 (Fig. 4) also can be provided adjacent the pouring or casting station 52 for preheating the dies or sand molds as the molten material M is introduced therein.
  • the permanent metal dies can be formed with cavities adjacent the castings within the dies, in which a heated gas, steam, water, organic solvent, thermal oil or other heated medium can be received and/or circulated through the dies for preheating the dies and enabling the dies to function as a heat treatment unit, heating the castings within the dies.
  • Various areas of the permanent dies further can be heated or cooled variably to enable variations in the desired mechanical properties of the castings formed therein, such as increased toughness or elongation properties, along desired areas of the castings.
  • the permanent metal dies are preheated to a desired temperature depending upon the heat treatment temperature required for the metal or alloy being used to form the casting, i.e., 400 - 600°C for aluminum.
  • the pre-heating of the permanent metal dies tends to substantially maintain and minimize loss of temperature of the castings being formed within the permanent metal dies at or near the heat treatment temperature for the castings as the permanent metal dies are transferred from the pouring station and to at least partially heat treat the castings as they solidify, and to enhance the heat treatment of the castings by reducing heat treatment times since the castings do not have to be significantly reheated to raise their temperature to levels necessary for heat treatment.
  • Active temperature control of the mold or die also permits careful control of metal solidification rates within the mold or die.
  • the process may include prescribed, controlled cooling rates for the molten metal, such that the metal solidifies, as a whole or in specific areas, to produce optimized metallurgical microstructures in the solid metal.
  • aluminum alloys may achieve higher properties if the Secondary Dendrite Arm Spacing (SDAS) of the solidified metal is sufficiently small so as to permit more effective solution of the elements.
  • SDAS is typically determined by the cooling rate of the casting or specific area of the casting; thus controlling cooling rates during solidification with the present invention generally will produce the desired SDAS, and hence improved properties in the casting.
  • the transfer mechanism 59 generally can include a transfer robot, winch, conveyor, carousel or other type of conventionally known transfer mechanism for moving the molds from the pouring station to the loading station.
  • the transfer mechanism positions each mold in a known, indexed position at the loading station, with the x, y and z coordinates of the dies being located in a Icnown orientation or alignment prior for heat treatment.
  • the molds thereafter generally are moved into a heat treatment station 62 to at least partially heat treat the castings and break down their sand cores and/or sand molds for removal.
  • the heat treatment station 62 generally includes a heat treatment furnace, typically a gas fired furnace, having a series of treatment zones or chambers for applying heat to the dies and thus to the castings, for at least partial heat treatment of the castings "in-die” or in-mold.
  • the heat treatment zones can include a variety of different heating environments such as conductive or convection heating chambers, for example, fluidized beds or forced air chambers, and the number of treatment zones or chambers can be divided into as many or as few zones as an individual application may require, depending upon the castings being processed. Additionally, following at least partial heat treatment of the castings while in-mold, the castings can be removed from their molds and passed through the heat treatment station for continued heat treatment, sand core removal and possibly for sand reclamation.
  • conductive or convection heating chambers for example, fluidized beds or forced air chambers
  • the heat treatment station 62 further generally includes a heat source 63.
  • the heat source 63 can include a series of nozzle stations 64 or assemblies each equipped with a plurality of nozzles 66.
  • the nozzles of each of the nozzle stations 64 generally are oriented at Icnown, preset positions and/or orientations in registration with the Icnown positions of certain ones or sets of access openings 56 of the molds 51.
  • the number of nozzle stations and the number of nozzles at each station can be varied as needed for providing heat and/or fluid flows in varying degrees and/or amounts to the dies for heat treating the castings therewithin to enable control of the heating of the dies and thus the castings, and the adjustment of the heating to different stages of heat treatment of the castings.
  • Each of the nozzles generally supplies a flow of a heated fluid media that is directed toward the molds and typically toward a specific die access opening or set of die access openings of each mold as indicated in Figs. 5A and 5B.
  • the fluid medium applied to the molds typically includes heated air, water, steam, thermal oils, organic solvents, or mixtures thereof, or other conventionally Icnown fluid media that are supplied under high pressure and at varying temperatures to heat the molds, with the temperature of the fluid media flows supplied by the nozzles being controlled to conform to different heat treatment stages as the casting is passed through the different nozzle stations of the heat treatment station.
  • the introduction of the heated fluid media into the molds through the access openings further generally tends to cause the core binder to dissolve so as to cause the cores to at least partially degrade and be dislodged and/or removed from the castings during heat treatment, with the dislodged sand material passing through the access openings with the draining of the fluids therefrom.
  • the molds also potentially can be at least partially opened as they pass through the nozzle stations for more direct application of the heated fluids media to the castings and core openings thereof for heat treatment and sand core removal.
  • nozzles 66 typically are robotically operated so as to be movable between a series of predetermined fluid application or nozzle positions as illustrated by arrows 67 and 68 in Figs. 5A and 5B.
  • nozzles 66 move about the molds in the direction of arrows 67 and 68, they apply a heated, pressurized fluid media F against the dies, typically directed toward and into the access openings 56, so as to raise and maintain the temperature of the dies at a sufficient temperature for heat treating the metal casting therewithin as the molten metal of the castings is solidified.
  • the part may be kept in the mold to complete the heat treatment before removal from the mold and quenching.
  • the various application or nozzle positions of the movable nozzles generally are determined or set according to the Icnown x, y and z coordinates of the molds, and thus their access openings, at the pouring station or upon the positioning or locating of the dies at the loading station by the die transfer mechanism.
  • the molds within their castings therein, can be immersed in a fluid bed (as indicated at 73 in Fig. 6) such as disclosed in U.S. Patent Nos. 5,294,994; 5,565,046; and 5,738,162), the disclosures of which have been incorporated by reference.
  • the molds and castings will be immersed in the fluid bed for heat-up, temperature control and/or mold/core sand removal.
  • the molds 51 of the present invention typically have the ability to be heated up to approximately 450 - 650°C or greater depending upon the solution heat treatment temperatures required for the alloy or metal of the casting that is contained or formed therein, and typically are preheated to a temperature sufficient to enable at least partial heat treatment of the casting immediately after pouring of the molten metal and to enable controlled solidification of the same while the casting yet resides in the mold or die.
  • the heating of the molds further is controlled through control of the temperature of the fluid media applied to the molds so as to heat and maintain the molds at the desired temperatures needed for heat treating the metal of the castings being formed therein to minimize heat loss during transfer to the heat treatment station, and thus minimize the amount of reheating required to raise the castings back to their heat treatment temperatures.
  • the molds typically are permanent type metal dies formed with cavities or chambers (indicated by dashed lines 69 in Figs. 5A and 5B) in close proximity to the internal cavity 53 in which the casting is formed.
  • a heated fluid media such as heated water, steam, thermal oils or other fluid materials capable of readily retaining heat, is then be supplied to the die structure, such as through the ports or access openings 56 (Figs. 4 - 5B), received within the internal cavities. This introduction of heated media into the dies tends to increase and help maintain the temperature of the casting at a desired level needed for heat treatment.
  • FIG. 6 - 8 Various alternative embodiments of heat treatment stations or chambers for use in the systems of the present invention are shown in Figs. 6 - 8, and can be used separately or in conjunction with each other to supplement or replace the nozzle stations as discussed above with additional heat treatment chambers having various types of alternative, different heat sources 63, which supply or direct energy toward the molds for raising and maintaining the temperature of the molds at the required temperature for heat treating the castings therein.
  • the molds 51 generally are sand mold packs and are placed on a conveyor or transport mechanism 71 for movement through the heating chamber 70 as indicated by arrows 72.
  • the heating chamber 70 typically is an elongated furnace chamber having an insulated floor, sides, and ceiling and, as illustrated in the embodiment of Fig. 6, a fluidized bed 73, typically formed from foundry sand and sand dislodged from the cores and sand molds for further degrading of the binder and reclaiming of the sand.
  • the heat source 63 is a radiant energy source 74, typically mounted in the ceiling of the heating chamber 70, although it will be understood by those skilled in the art that the radiant energy source can also be mounted in side walls. In addition, multiple radiant energy sources can be used, mounted in the side walls, overhead and/or below the molds as they are moved through the heating chamber 70 on the conveyor or transport mechanism.
  • An example of a radiant energy source will be a infrared emitter or other Icnown type of radiant energy source.
  • the radiant energy source generally will direct radiant energy at approximately 400 - 650°C toward the dies passing through the heating chamber, typically being directed against the sides and/or top of each mold as illustrated by arrows 74.
  • the molds, and thus the castings therewithin, are subjected to the radiant energy source for a desired length of time, depending upon the metal of the castings being heat treated.
  • the radiant energy generally is absorbed by the molds, causing the temperature of the molds to correspondingly increase so as to heat the molds and thus the castings therewithin from the outside to the inside of the molds.
  • Fig. 7 shows a further alternative heating chamber 80 for use in the in- mold heat treatment of the present invention, typically for use with sand mold packs formed from sand and a combustible binder.
  • the heating chamber 80 generally is an elongated furnace having an insulated floor, ceiling and sides and includes a conveyor or other transport mechanism 81 for moving the molds, with their castings therewithin, through the heating chamber 80 in the direction of arrows 82.
  • the heat source 63 of the heating chamber 80 generally includes an induction energy source 83 for applying induction energy to the mold packs, and thus to the castings and sand cores 54 and 55 contained therewithin and can include a fluid bed along its floor for collection and reclamation of sand dislodged from the sand cores and sand molds.
  • the induction energy source generally can include a conduction coil, microwave energy source or other known induction energy sources or generators, and, as with the radiant energy source of Fig. 6, can be positioned in the ceiling of the heating chamber 80, above the molds, along the sides of the heating chamber, or both.
  • the induction energy source will create a high energy field of waves, indicated by arrows 84, that are directed toward the top and/or sides of the molds 51 and are of a particular frequency or frequencies that will be absorbed by the sand cores 55 so as to cause the temperature of the sand cores and thus the castings to be increased to correspondingly heat treat the metal castings within the mold packs by heating the casting and thus the molds from the inside out.
  • a heating chamber 90 for use in the present invention for heat treatment of the castings while "in-mold" by adding energy to the molds and thus the castings to increase the temperature thereof is shown in Figs 8A and 8B.
  • the molds typically will comprise sand molds formed from sand and a combustible binder.
  • the heating chamber 90 typically is an elongated autoclave or similar heating chamber operating under high pressures or vacuums, and includes a conveyor or transport mechanism 91 for conveying the molds 51 with their castings 54 contained therein in the direction of arrows 92. As the molds and castings are moved through the autoclave heating chamber 90, they generally are passed through a pressurized, low velocity oxygen chamber 93 in which an enriched oxygenated atmosphere is present.
  • the oxygen chamber generally includes a high pressure, upstream side 94 and a low pressure, downstream side 96 that are positioned opposite each other so that a flow of oxygen is passed therebetween.
  • the castings and molds will enter the autoclave heating chamber approximately at atmospheric pressure.
  • the pressure in the chamber is increased and the flow of heated oxygen gas is directed at and is forced through the mold packs, as indicated by arrows 97 (Fig. 8A) and 97 (Fig. 8B).
  • the oxygen flow is driven into and through the molds and to the inner cores of the castings.
  • the pressurized low velocity oxygen chamber can be oriented in either a vertical orientation (shown in Fig. 8A) or a substantially horizontal orientation (shown in Fig. 8B) for forcing the hot oxygen gasses through the mold packs, depending upon size and space configurations for the heating chamber.
  • the molds further can be formed with or to include a vacuum port or opening, indicated by 102, formed along either the upper or lower surfaces of the molds.
  • a suction or vacuum, indicated at 103, is applied at the port 102 formed in each mold for drawing the oxygen gas into and tlirough or molds.
  • the molds are gas or air tight and can include a plug (not shown) for sealing the port 102, but which can be removed from the port 102 to provide a suction or vacuum point along the molds as the oxygen gas is drawn or flows through the molds.
  • the molds and their castings are further supplied with heat energy from the enhanced combustion of the binder material thereof and the oxygen gas, which thus acts as a heat source to increase the temperature of the castings in the mold packs, while at the same type breaking down the binder of the molds and/or sand cores for ease of removal and reclamation.
  • a radiant energy heat treatment chamber 70 can be mounted or positioned at an upstream end 106 (Fig. 9) of the heat treatment unit 105.
  • the radiant heating chamber 70 generally heats the molds to a temperature sufficient to initiate the combustion of the binder of the molds while the same time heating the castings therewithin to begin the heat treatment of the castings while still in-mold.
  • a further heating chamber 80 having an induction energy source therein, generally will be positioned downstream from the radiant heating chamber 70.
  • the heating chamber 80 will apply induction energy via a high energy field of electromagnetic waves as discussed above, which generally will tend to further promote the combustion of the binder and heat treatment of the castings within the molds.
  • the application of the inductive energy waves will tend to cause cracking or breaking of the sand molds into sections or pieces to further promote the breakdown of the sand molds.
  • an oxygen heating chamber 90 such as shown in Figs. 8A - 8C, will be positioned downstream from heating chamber 80.
  • the forced flow of oxygen through the chamber promotes and enhances the combustion of the sand molds and sand cores.
  • the binder of the sand molds having been raised to a combustion temperature and the molds becoming cracked in the heating chambers 70 and 80, and/or pieces thereof becoming broken or dislodged, the further enhancement of the combustion of the binder of the sand cores within the oxygen heating chamber 90 tends to promote the increased breakdown and dislodging of the sand molds and sand cores form the castings.
  • the time required for breakdown and removal of the sand molds and sand cores is decreased so that the castings are more rapidly exposed directly to the heating environment of the heat treating unit, while at the same time, the rapid breakdown and combustion of the binder of the sand molds further enhances the heating of the castings to their solution heat treatment temperatures.
  • the molds are heated to desired temperatures and can be maintained at a such temperatures as needed for heat treating the castings being formed therewithin as the molten metal of the casting is solidified within the molds.
  • Such in-mold heat treatment of the castings can significantly cut the processing time required for heat treating castings, for example, to as low as approximately 10 minutes or less, as the metal of the castings is generally elevated and stabilized at the heat treatment temperature shortly after pouring of the molten metal material into the molds.
  • the heat treatment of the castings can take place in a relatively short period of time following the pouring of the molten metal material into the molds.
  • the raising of the temperature of the molds to the heat treatment temperature for heat treating the castings further enhances the breakdown and combustion of the combustible organic binders of the sand cores and/or sand molds, if used, so as to further reduce the time required for the heat treatment and dislodging and reclamation of the sand cores and sand molds of the casting process.
  • the castings typically are removed from their molds and can be moved to an additional heat treatment station for completion of the heat treatment of the castings, as needed, and for sand core removal and possible reclamation of the sand materials of the cores.
  • the castings are then moved into a quenching station 110 for quenching and cooling of the castings.
  • the castings can be removed from their dies and transferred directly to the quenching station.
  • the quenching station 110 typically includes a quench tank having a cooling fluid such as water or other Icnown coolant material, but the quenching station can also comprise a chamber having one or a series of nozzles, indicated at 111 in Fig. 4, that apply cooling fluids such as air or water to the castings.
  • the quenching also can take place in contiguous ancillary quenching equipment that is in close proximity to the pouring station so that cycle time and heat variations can be minimized for the setting and treatment of the molten metal material of the castings within the molds.
  • the castings can be removed from the molds and transferred to the quench tank of the quench station for cooling the castings before further processing, and sand removed from the castings then can be reclaimed for later reuse.
  • Figs. 10A and 10B illustrate still a further embodiment 200 of the present invention for the enhanced heat treatment and breakdown and removal of sand cores and/or sand molds from a series of castings 201.
  • a molten metal or metal alloy M (Fig. 10A) is poured into a mold, such as a cast iron or other permanent type die or a semi-permanent or precision sand mold 202 at a pouring or casting station 203.
  • the molds generally include an internal cavity 204 in which the molten metal is received and solidified to form the casting 201 and in which a sand core 206 typically is provided for forming ports or other interior detail for the casting.
  • the molds in this embodiment will also include a series of ports or mold access openings 207 that extend through the side walls 208 of the molds. These ports provide an access to the interior cavity or chamber 204, and thus the casting being formed therein, for direct application of heat to the castings while "in-mold” and for assistance in dislodging and removal of the sand cores 206 therefrom.
  • the castings thereafter are removed from the casting or pouring station 203 by a transfer mechanism 210, which transfers the molds with their castings therewithin or which first removes the castings and thereafter transfers the castings individually to an inlet conveyor or loading station, indicated by 211 in Fig. 10 A, for a heat treatment line or unit 212.
  • the transfer mechanism can include a crane or robotic arm 213, as illustrated in Fig. 10B, including a gripping or engaging portion 214 that is adapted to engage, grip and lift the molds and/or castings and is mounted to one end of a body or articulateable arm that is movably attached to a base portion 214.
  • the crane or arm 213 thus is moveable between a transfer position at the pouring station and the inlet 211 of the heat treatment unit or line 212 as indicated in Fig. 10A.
  • various other systems or devices for transferring the castings from the pouring station to the heat treatment line also can be used, such as an overhead crane, winch, conveyor, hoist, carousel, push rods and other Icnown material handling devices.
  • the transfer mechanism 210 will position the molds or castings themselves at the inlet or loading station of the heat treatment line with the molds or castings being located in a Icnown, indexed position with their X, Y and Z coordinates in a Icnown orientation or alignment prior to heat treatment.
  • this can include locating or mounting the castings or molds on locator devices such as depositing one or more castings in a saddle having pins, walls and/or other types of locator devices therein so as to locate and fix the position of the molds or castings within the saddles.
  • the molds and/or castings will be introduced into a process temperature control station or pre-treatment chamber 218 prior to introduction into the heat treatment furnace 219 of the heat treatment unit 212.
  • the castings will be permitted to cool a sufficient amount as is necessary for the molten metal within the molds to solidify and harden to form the castings.
  • the metal of the castings is cooled below the point at which it has solidified, it reaches a process control temperature below which the time required to both raise the temperature of the metal of the castings back up to a solution heat treatment temperature and for performing the heat treatment thereof is significantly increased.
  • This process control temperature generally varies depending upon the metal and/or metal alloy being used to form the casting, generally ranging from temperatures of approximately 400 °C or lower for some metals or alloys such as aluminum/copper alloys, up to approximately 1000°C - 1300°C or greater for other metals or alloys such as iron and steel.
  • the process control temperature can generally range from about 400°C to about 470°C, which temperatures generally fall below the solution heat treatment temperatures for most aluminum/copper alloys, which instead range from approximately 475 °C to approximately 490°C and occasionally higher.
  • a casting is permitted to cool below its process control temperature for approximately 10 minutes, it can take as much as 40 minutes or more of additional heat treatment/soaking time at the solution heat treatment temperature for the metal of the castings in order to properly and completely heat treat the casting.
  • the castings are one of several that are loaded into a basket or tray for processing numerous castings in a batch at a single time, it generally has been necessary to heat treat the entire batch of castings for a time and to an extent necessary to completely heat treat the casting(s) with the lowest temperature. This accordingly will require that the majority of the castings in the batch will be subjected to heat treatment for a significantly longer period of time than required to ensure complete treatment of all castings in the batch, thus resulting in wasted energy and increased processing times for the castings.
  • the process temperature control station 218 generally is an elongated tunnel or unit having side walls 221, a ceiling 222 and a floor or bottom 223 through which a conveyor or similar transport mechanism 224 is extended for conveying the molds and/or castings therethrough.
  • the ceiling 222 and sides 221 of the process temperature control station 218 generally are formed from or have applied thereto a radiant material such as a metal, metal foil, ceramic or other types of composite materials that radiate or direct heat inwardly toward the castings so as to thus define a radiant chamber 226 within the process temperature control station.
  • a series of heat sources 227 generally are mounted in the ceiling and/or along the side walls of the process temperature control station so as to direct a flow of heat energy into the chamber 226 to create a heated environment therewithin.
  • the heat sources 227 can include radiant heaters such as infrared or inductive heating elements, conductive, convection, or other types of heating elements, including the use of nozzles that spray a heated fluid media, such as air, water, steam, thermal oils and the like, about the molds and/or castings.
  • the process temperature control station 218 further generally includes an inlet or upstream end 228 and a downstream or outlet end 229, each of which can include a sliding door, curtain or similar closure device 231.
  • the cooling of the castings is arrested by the application of heat from heat sources 227. Thereafter, the castings are generally maintained at or above their process control temperature, which temperature generally varies depending upon the metal used to form the castings until the castings are introduced into the heat treatment furnace 219. As a result, the castings are permitted to cool sufficiently to allow the metal thereof to solidify, while the cooling of the castings is arrested at or above the process control temperature. As a result, the castings are introduced into the heat treatment furnace, they can be more efficiently and rapidly brought to their solution heat treatment temperatures and subjected to substantially complete heat treatment more efficiently. h addition, as indicated in Fig.
  • an additional heat source or heating element 232 can be mounted above the inlet 211 for the heat treatment line 219 so as to apply heat to the castings as they are deposited onto the heat treatment line and are introduced into the process temperature control station. It is also possible to mount a heat source such as a radiant heater, convection, conduction or other heating element on the transfer mechanism itself, or along the path of travel 233 (Fig. 10 A) of the castings so as to apply heat to the castings during the transfer of the castings from the pouring station to the heat treatment line.
  • a heat source such as a radiant heater, convection, conduction or other heating element
  • the castings and/or molds with the castings therein will be passed from the process temperature control station directly into the heat treatment furnace 219 of the heat treatment line.
  • the heat treatment furnace generally will comprise a heat treatment furnace or station as discussed above with respect to the embodiments of Figs. 1 and 4.
  • An example of such a heat treatment furnace for heat treatment and at least partial breakdown and/or reclamation of the sand cores and/or sand molds from the castings is illustrated in U.S. Patent Nos. 5,294,994; 5,565,046; 5,738,162, and 6,217,317, the disclosures of which have previously been incorporated by reference.
  • the heat treatment furnace generally includes a series of treatment zones, chambers or stations, indicated by 236 in Fig. 104, for applying heat to the molds and/or castings for heat treatment of the castings.
  • the castings can be heat treated while at least partially "in-mold", while at the same time the sand molds in which the castings are contained can be rapidly broken down and removed from the castings and the sand materials thereof reclaimed.
  • the heat treatment zones or chambers also can include a variety of different heating environments such as conductive or convection heating chambers, radiant heating chambers or chambers in which an enhanced or negative air pressure draws a flow of oxygen through the sand molds of the castings to enhance the combustion of the binders of the sand molds.
  • the heat treatment furnace further can be divided into as many or as few treatment zones as an individual application may require depending upon the castings being processed.
  • the castings After passing through the heat treatment furnace 219, the castings thereafter generally are removed from the heat treatment furnace and can be transported to a quench station 240 (Fig. 10A) for quenching or further processing. Accordingly, the present invention enables the reduction or elimination of a requirement for further heat treating of the castings once removed from the molds, which are heated to provide solution heating time and cooled to provide the quenching effect necessary, while in-mold, so as to significantly reduce the amount of heat treatment/processing time required for forming metal castings.
  • the present invention further enables an enhanced or more efficient heat treatment and breakdown and removal of sand cores within the castings by directing fluid flows at the castings at preset positions, corresponding to Icnown orientations or alignments of the castings and/or the molds with the castings contained therein as they are passed through a heat treatment station.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)

Abstract

L'invention concerne un système et un procédé de traitement à chaud de pièces moulées et d'élimination de noyaux en sable de celles-ci. Les pièces moulées sont initialement placées dans des positions indexées dont les coordonnées x, y et z sont connues. Les pièces moulées sont passées dans une station de traitement à chaud comportant typiquement une série d'ajutages montée dans des positions prédéfinies correspondant aux positions indexées et connues des pièces moulées passant dans la station de traitement à chaud. Les ajutages appliquent un fluide aux pièces moulées pour traiter à chaud les pièces moulées et dégrader les noyaux en sable à extraire des pièces moulées.
PCT/US2003/024928 2002-08-08 2003-08-07 Procedes et appareil de traitement a chaud et d'elimination du sable pour pieces moulees WO2004014581A2 (fr)

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EP03785083A EP1575722A2 (fr) 2002-08-08 2003-08-07 Procedes et appareil de traitement a chaud et d'elimination du sable pour pieces moulees
JP2004527921A JP2006504531A (ja) 2002-08-08 2003-08-07 鋳造物のための熱処理および砂除去のための方法および装置
MXPA05001393A MXPA05001393A (es) 2002-08-08 2003-08-07 Metodos y aparatos para el tratamiento con calor y remocion de arena para fundiciones.
CA002495514A CA2495514C (fr) 2002-08-08 2003-08-07 Procedes et appareil de traitement a chaud et d'elimination du sable pour pieces moulees
AU2003259701A AU2003259701B2 (en) 2002-08-08 2003-08-07 Methods and apparatus for heat treatment and sand removal for castings
HK06107872A HK1087664A1 (en) 2002-08-08 2006-07-14 Methods and apparatus for heat treatment and sand removal for castings

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US40196902P 2002-08-08 2002-08-08
US60/401,969 2002-08-08

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006004756A2 (fr) * 2004-06-28 2006-01-12 Consolidated Engineering Company, Inc. Procede et appareil d'elimination des barbes et des elements de blocage d'un moulage
JP2008519155A (ja) * 2004-10-29 2008-06-05 コンソリデイテッド エンジニアリング カンパニー， インコーポレイテッド 高圧ガス噴射衝突熱処理システム
EP2038254A2 (fr) * 2006-06-29 2009-03-25 Kinex Pharmaceuticals, LLC Compositions bicycliques et procédés de modulation d'une cascade de kinases
WO2015032427A1 (fr) * 2013-09-04 2015-03-12 Nemak Dillingen Gmbh Procédé permettant de démouler d'un moule une pièce moulée à partir d'un métal léger fondu
DE102014221994A1 (de) * 2014-10-29 2016-05-04 Bayerische Motoren Werke Aktiengesellschaft Herstellen und Bearbeiten von Gussteilen
US10040114B2 (en) 2009-04-24 2018-08-07 Wartsila Finland Oy Method for producing an article having a cavity
CN110538983A (zh) * 2019-10-08 2019-12-06 安洁无线科技（苏州）有限公司 水道板低压铸造工艺
US11001917B2 (en) 2016-04-28 2021-05-11 Alotech Limited, Llc Ablation casting process

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1399945B1 (it) * 2010-04-29 2013-05-09 Turbocoating S P A Metodo e apparato per rimuovere ricoprimenti ceramici, con sabbiatura di anidride carbonica allo stato solido.
FR2978927B1 (fr) 2011-08-09 2013-09-27 Snecma Procede de fonderie de pieces metalliques monocristallines
WO2015115231A1 (fr) * 2014-01-28 2015-08-06 有限会社ウインズテック Procédé pour le retrait de noyau en sable et appareil s'y rapportant
CN108213341A (zh) * 2017-05-08 2018-06-29 宁夏迪艾投资合伙企业（有限合伙） 一种磁控震动去除3d打印砂型多余砂料的装置及其方法
MX2020010276A (es) * 2018-03-30 2020-11-06 Basf Se Limpieza de moldes en la fundicion.
CN111906292A (zh) * 2019-05-08 2020-11-10 潜山县凯创橡塑机械制造有限公司 一种合金衬套生产线
CN111482593A (zh) * 2020-04-27 2020-08-04 遂昌县鑫鼎特种铸造有限公司 一种铸造生产线
CN113462864B (zh) * 2021-06-08 2022-11-22 中国科学院金属研究所 一种高温合金空心铸件带芯进行真空热处理的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546210A1 (fr) * 1991-05-24 1993-06-16 Consolidated Engineering Company, Inc. Procédé et dispositif pour le traitement thermique de pièces coulées
US5829509A (en) * 1996-02-23 1998-11-03 Consolidated Engineering Co, Inc. Integrated system and process for heat treating castings and reclaiming sand
US6253830B1 (en) * 1996-09-30 2001-07-03 Procedyne Corp. Apparatus and method for sand core debonding and heat treating metal castings
US20020084052A1 (en) * 1999-07-29 2002-07-04 Consolidated Engineering Company, Inc. Methods and apparatus for heat treatment and sand removal for castings

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH622726A5 (en) * 1976-12-09 1981-04-30 Kohlswa Jernverks Ab Method for knocking out silicate-bound moulding compound from a mould filled with casting
JPS5653867A (en) * 1979-10-03 1981-05-13 Sanken Sangyo Kk Method and device for shaking out sand from aluminum casting prepared in sand core
JPS59219410A (ja) * 1983-05-27 1984-12-10 Trinity Ind Corp 砂型鋳造品の熱処理装置
JPH0191957A (ja) * 1987-03-03 1989-04-11 Mazda Motor Corp 鋳物の熱処理方法
JPH04500780A (ja) * 1987-12-08 1992-02-13 サハリ、ハリ 金属鋳造に用いられる鋳型と中子の調製方法
US5294094A (en) 1989-09-29 1994-03-15 Consolidated Engineering Company Method and apparatus for heat treating metal castings
US5350160A (en) * 1989-09-29 1994-09-27 Consolidated Engineering Company Method and apparatus for heat treating metal castings
US5354038A (en) 1989-09-29 1994-10-11 Consolidated Engineering Company, Inc. Heat treatment of metal castings and in-furnace sand reclamation
US5262100A (en) * 1990-07-11 1993-11-16 Advanced Plastics Partnership Method of core removal from molded products
US5089186A (en) * 1990-07-11 1992-02-18 Advanced Plastics Partnership Process for core removal from molded products
US5294994A (en) 1992-04-06 1994-03-15 Digital Equipment Corporation Integrated computer assembly
US6241000B1 (en) * 1995-06-07 2001-06-05 Howmet Research Corporation Method for removing cores from castings
US5778963A (en) * 1996-08-30 1998-07-14 United Technologies Corporation Method of core leach
IT1289815B1 (it) 1996-12-30 1998-10-16 Sorin Biomedica Cardio Spa Stent per angioplastica e relativo procedimento di produzione
US5738162A (en) 1997-02-20 1998-04-14 Consolidated Engineering Company, Inc. Terraced fluidized bed
IT1295224B1 (it) * 1997-10-14 1999-05-04 Magneti Marelli Spa Macchina per la rimozione di anime in sale imprigionate in manufatti pressocolati o stampati ad iniezione.
US6217317B1 (en) 1998-12-15 2001-04-17 Consolidated Engineering Company, Inc. Combination conduction/convection furnace
JP3817476B2 (ja) * 1999-07-29 2006-09-06 コンソリデイテッド エンジニアリング カンパニー， インコーポレイテッド 鋳造物用の熱処理および砂除去

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546210A1 (fr) * 1991-05-24 1993-06-16 Consolidated Engineering Company, Inc. Procédé et dispositif pour le traitement thermique de pièces coulées
US5829509A (en) * 1996-02-23 1998-11-03 Consolidated Engineering Co, Inc. Integrated system and process for heat treating castings and reclaiming sand
US6253830B1 (en) * 1996-09-30 2001-07-03 Procedyne Corp. Apparatus and method for sand core debonding and heat treating metal castings
US20020084052A1 (en) * 1999-07-29 2002-07-04 Consolidated Engineering Company, Inc. Methods and apparatus for heat treatment and sand removal for castings

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 005, no. 112 (M-079), 21 July 1981 (1981-07-21) & JP 56 053867 A (SANKEN SANGYO KK), 13 May 1981 (1981-05-13) *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 088 (C-276), 17 April 1985 (1985-04-17) -& JP 59 219410 A (TORINITEI KOGYO KK), 10 December 1984 (1984-12-10) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 300 (M-848), 11 July 1989 (1989-07-11) -& JP 01 091957 A (MAZDA MOTOR CORP), 11 April 1989 (1989-04-11) *
See also references of EP1575722A2 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4903696B2 (ja) * 2004-06-28 2012-03-28 コンソリデイテッド エンジニアリング カンパニー， インコーポレイテッド 鋳造物からばりおよび閉塞片を除去するための方法および装置
WO2006004756A3 (fr) * 2004-06-28 2006-03-30 Cons Eng Co Inc Procede et appareil d'elimination des barbes et des elements de blocage d'un moulage
US7252134B2 (en) 2004-06-28 2007-08-07 Consolidated Engineering Company, Inc. Method and apparatus for removal of flashing and blockages from a casting
JP2008504129A (ja) * 2004-06-28 2008-02-14 コンソリデイテッド エンジニアリング カンパニー， インコーポレイテッド 鋳造物からばりおよび閉塞片を除去するための方法および装置
WO2006004756A2 (fr) * 2004-06-28 2006-01-12 Consolidated Engineering Company, Inc. Procede et appareil d'elimination des barbes et des elements de blocage d'un moulage
KR101211347B1 (ko) * 2004-06-28 2012-12-11 콘솔리데이티드 엔지니어링 캄파니, 인크. 주물로부터의 플래싱 및 방해물의 제거를 위한 방법 및장치
CN1976772B (zh) * 2004-06-28 2011-12-14 联合工程公司 清除铸件飞边和堵塞的方法和装置
JP2008519155A (ja) * 2004-10-29 2008-06-05 コンソリデイテッド エンジニアリング カンパニー， インコーポレイテッド 高圧ガス噴射衝突熱処理システム
EP2038254A2 (fr) * 2006-06-29 2009-03-25 Kinex Pharmaceuticals, LLC Compositions bicycliques et procédés de modulation d'une cascade de kinases
US10040114B2 (en) 2009-04-24 2018-08-07 Wartsila Finland Oy Method for producing an article having a cavity
WO2015032427A1 (fr) * 2013-09-04 2015-03-12 Nemak Dillingen Gmbh Procédé permettant de démouler d'un moule une pièce moulée à partir d'un métal léger fondu
RU2635598C2 (ru) * 2013-09-04 2017-11-14 Немак, С.А.Б. Де К.В. Способ извлечения из формы для литья литой заготовки, отлитой из лёгкого сплава
US9895745B2 (en) 2013-09-04 2018-02-20 Nemak, S.A.B. De C.V. Method for demoulding a casting, cast from a light metal melt, from a casting mould
DE102014221994A1 (de) * 2014-10-29 2016-05-04 Bayerische Motoren Werke Aktiengesellschaft Herstellen und Bearbeiten von Gussteilen
DE102014221994B4 (de) 2014-10-29 2023-03-30 Bayerische Motoren Werke Aktiengesellschaft Herstellen und Bearbeiten von Gussteilen
US11001917B2 (en) 2016-04-28 2021-05-11 Alotech Limited, Llc Ablation casting process
CN110538983A (zh) * 2019-10-08 2019-12-06 安洁无线科技（苏州）有限公司 水道板低压铸造工艺

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CN1753746A (zh) 2006-03-29
WO2004014581A3 (fr) 2005-10-13
CA2495514C (fr) 2009-11-03
CA2495514A1 (fr) 2004-02-19
EP2027953A3 (fr) 2010-01-20
EP2027952A3 (fr) 2010-01-20
AU2003259701A1 (en) 2004-02-25
HK1087664A1 (en) 2006-10-20
JP2006504531A (ja) 2006-02-09
CN100335208C (zh) 2007-09-05
EP2027953A2 (fr) 2009-02-25
EP2027952A2 (fr) 2009-02-25
EP1575722A2 (fr) 2005-09-21

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