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EP3225332B1 - Machine pour couler automatique et procédé de coulée automatique permettant la mise en pression - Google Patents

Machine pour couler automatique et procédé de coulée automatique permettant la mise en pression Download PDF

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Publication number
EP3225332B1
EP3225332B1 EP14906970.0A EP14906970A EP3225332B1 EP 3225332 B1 EP3225332 B1 EP 3225332B1 EP 14906970 A EP14906970 A EP 14906970A EP 3225332 B1 EP3225332 B1 EP 3225332B1
Authority
EP
European Patent Office
Prior art keywords
mold
molten metal
pouring
unit
granular material
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP14906970.0A
Other languages
German (de)
English (en)
Other versions
EP3225332A4 (fr
EP3225332A1 (fr
Inventor
Tadashi Nishida
Masayuki Kato
Koichi Banno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sintokogio Ltd
Fujiwa Denki Co Ltd
Original Assignee
Sintokogio Ltd
Fujiwa Denki Co Ltd
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 Sintokogio Ltd, Fujiwa Denki Co Ltd filed Critical Sintokogio Ltd
Publication of EP3225332A1 publication Critical patent/EP3225332A1/fr
Publication of EP3225332A4 publication Critical patent/EP3225332A4/fr
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Publication of EP3225332B1 publication Critical patent/EP3225332B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/02—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume
    • B22D39/026—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume using a ladler
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/02—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
    • B22D27/13—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas pressure

Definitions

  • the present invention relates to a pouring machine and a method for pouring that are used in a foundry. Specifically, it relates to a pouring machine and method that have the ability to pressurize molten metal in a mold.
  • molten metal that has melted in a melting furnace and that is at a high temperature is poured into a mold in an area for pouring, to thereby cast a product.
  • molten metal is poured into a mold, it is poured into the upper end of a pouring cup in consideration of shrinkage during solidification in the mold.
  • the mold is shaken out.
  • the sprue, the runner, and the riser which are some of the parts other than the product, are separated from the product so as to be again melted, for return scrap.
  • the riser is needed during solidification to ensure the soundness of the product, the runner and the sprue are needed only for filling molten metal into a cavity during pouring.
  • the filling material is supplied to the cavity through the sprue before the cavity is filled with the molten metal, so that the cavities other than the desired cavity are filled with the filling material.
  • heat is transferred to the filling material so that the temperature on the surface of the molten metal becomes low.
  • the molten metal may solidify before the desired cavity is filled with it.
  • the resistance to feed the filling material to the cavities may increase. Thus, there are some cases where a desired filling of the molten metal is difficult.
  • WO 2014/077021 A1 discloses a test piece sampling method, wherein the method samples molten metal in a ladle in an automatic pouring device.
  • the pouring device pours metal in the ladle into a mold.
  • the method further includes the step of pouring molten metal in ladle units into a test piece cavity formed at the upper surface of the mold. After the molten metal poured into the test piece cavity has cooled to form a test piece, the method further includes a step of removing and sampling the text piece from the mold.
  • JP 2011 206785 A discloses a casting method, wherein a required amount of molten metal is poured into a sand mold and a casting product is cast.
  • the sand mold includes: a molten metal pouring part forming a cavity for pouring molten metal, a product part forming a cavity for the casting product and a runner forming a cavity communicating and connecting the molten metal pouring part with the product part.
  • the casting method includes: a step of pouring a molten metal of a volume almost the same as the total volume of the product part and the runner into the molten metal pouring part; and a step of inserting a heat resistant plug into the molten metal pouring part with the molten metal poured therein, extruding the molten metal in the molten metal pouring part, filling the molten metal into the product member and into the runner, and thereafter clogging the opening part at the distal end of the runner
  • JP 2010 269345 A discloses a casting method, wherein molten metal having a volume substantially equal to that of a desired cavity part for filling with molten metal is filled into a cavity. Furthermore, additive materials are fed from a pouring gate. The poured molten metal is filled in the desired cavity part and the additive materials are filled in other cavities.
  • the present invention aims to provide a machine and method for efficiently pouring and definitely filling only a desired cavity with molten metal among cavities to cause the molten metal to solidify there.
  • the unit 20 for pressurizing the molten metal has a hopper 22 that stores the granular material and a mouth 26 that connects with a sprue A1 of the mold A that is filled with the molten metal, which mouth 26 feeds the pressurized gas and the granular material to the mold A. It also has a regulating chamber 24 that regulates an amount of the granular material to be supplied from the hopper 22 to the mouth 26. It also has a piping 28 that introduces the pressurized gas to the regulating chamber 24 and a piping 30 that connects with the mouth 26 to introduce the pressurized gas.
  • the unit 20 for pressurizing the molten metal supplies the pressurized gas and the granular material to the mold A(2) among the plurality of molds A that is located next to the mold A(1) into which the pouring unit 10 pours the molten metal.
  • the molds A are individually indicated by a number in parentheses, such as A(1), A(2), ... (see Fig. 6 ).
  • pressurized gas and a granular material are supplied from the unit for pressurizing the molten metal to a mold into which molten metal has been poured from the pouring unit. Since the pressurized gas is supplied, the molten metal is squeezed into the desired cavity. Since the predetermined amount of the granular material is supplied, the molten metal that has been squeezed into the cavity is plugged. Then heat is transferred to the granular material so that the molten metal at the entrance to the cavity is cooled and solidifies.
  • the automatic pouring machine can efficiently pour molten metal into a mold and definitely fill only a desired cavity among cavities with molten metal so that the molten metal solidifies there.
  • the unit for pressurizing the molten metal supplies the pressurized gas and the granular material to the mold that is located next to the mold among the plurality of molds that is poured by the pouring unit, the unit for pressurizing the molten metal can supply the pressurized gas and the granular material immediately after the pouring unit pours the molten metal into the mold.
  • the unit 20 for pressurizing the molten metal may be configured to move the mouth 26 in the direction that is parallel to, and in the direction that is perpendicular to, the line L of molds where a plurality of molds A are transported.
  • the above-mentioned automatic pouring machine 1 that has the ability to pressurize, for example, as in Fig. 2 , further comprises a position sensor 50 that detects a position of the sprue A1 of the mold A so as to move the mouth 26 to the position of the sprue A1.
  • the pouring unit 10 may have a traversing carriage 4 that moves parallel to the line L of molds. It also has a carriage for moving back and forth 6 that moves perpendicularly to the line L of molds on the traversing carriage 4.
  • the unit 20 for pressurizing the molten metal may be supported by the traversing carriage 4.
  • the granular material may be dry silica sand. It has a high fluidity, and so is supplied to a mold so that the runner hardly clogs with it. Further, it hardly deteriorates even when contacting hot molten metal. It is cheap and easy to obtain. Thus the automatic pouring machine is easy to use.
  • molten metal is poured from a ladle 2 that is transported along a line L of molds where a plurality of molds A are transported, and pressurized gas and a predetermined amount of a granular material are supplied from a unit 20 for pressurizing the molten metal to the mold A that is filled with the molten metal.
  • the unit 20 has a hopper 22 that stores the granular material.
  • It also has a mouth 26 that hermetically connects with the sprue A1 of the mold A that is filled with the molten metal and which mouth feeds the pressurized gas and the granular material to the mold A. It also has a regulating chamber 24 that regulates an amount of the granular material to be supplied from the hopper 22 to the mouth 26. It also has a first piping 28 that introduces the pressurized gas to the regulating chamber 24 and a second piping 30 that connects with the mouth 26 to introduce the pressurized gas. It is configured to move along the line L of molds together with the ladle 2.
  • the method comprises a step of moving the ladle 2 so that molten metal can be poured into the sprue A1 of a first mold A(1) on the line L of molds where a plurality of molds A are transported. It also comprises a step of pouring molten metal from the ladle 2 to the first mold A(1). It also comprises a step of hermetically connecting the mouth 26 to the sprue A1 of a second mold A(2) that is located next to the first mold A(1) and that is filled with molten metal. It also comprises a step of supplying pressurized gas from the second piping 30 to the second mold A(2) through the mouth 26.
  • It also comprises a step of regulating a predetermined amount of the granular material by the regulating chamber 24, which granular material has been stored in the hopper 22. It also comprises a step of supplying the regulated granular material to the second mold A(2) through the mouth 26 by supplying the pressurized gas from the first piping 28 to the regulating chamber 24.
  • the pressurized gas and the predetermined amount of the granular material are supplied from the unit for pressurizing the molten metal to a mold into which molten metal has been poured from a ladle. Since the pressurized gas is supplied to the mold, the molten metal is squeezed into a desired cavity. Since the predetermined amount of the granular material is supplied to the mold, the molten metal that has been squeezed into the cavity is plugged. Since the heat is transferred to the granular material, the molten metal at the entrance to the cavity is cooled, and it solidifies.
  • the method for automatically pouring can efficiently pour molten metal into a mold and definitely fill only the desired cavity, among the cavities, with molten metal so that the molten metal solidifies there.
  • the above-mentioned method for automatically pouring may further comprise a step of detecting a position of the sprue A1 of the second mold A(2) by means of a position sensor 50 and a step of moving the mouth 26 based on the detected position.
  • the mouth is quickly and accurately moved to the position of the sprue of the mold based on the detected position by the sensor, to be hermetically connected to the sprue.
  • a time when pouring molten metal into the first mold A(1) is completed may coincide with a time when supplying the pressurized gas and the granular material to the second mold A(2) is completed. Further, the times may coincide with a time when the plurality of molds A on the line L of molds start to be transported.
  • the ladle 2 may be moved so as to pour molten metal into the sprue A1 of the first mold A(1). Then in the unit 20 for pressurizing the molten metal that has been moved together with the ladle 2 the mouth 26 may be moved so as to be hermetically connected with the sprue A1 of the second mold A(2).
  • the distance between the pouring unit and the unit for pressurizing the molten metal is maintained to be equal to the length of a mold. Then, if needed, the mouth may be moved to the position of the sprue. Thus the movement of the mouth can be suppressed to be small and the mouth can be quickly moved to the position of the sprue.
  • the granular material may be dry silica sand. If so, it has a high fluidity, and so is supplied to a mold so that the runner hardly clogs with it. Further, it hardly deteriorates even when contacting hot molten metal. It is cheap and easy to obtain. Thus the method for automatically pouring is easy to use.
  • Fig. 1 shows a plan view of the automatic pouring machine 1, which is an embodiment of the present invention. It is equipped with the unit 20 for pressurizing the molten metal.
  • the automatic pouring machine 1 is configured to move on a rail B that is disposed to be parallel to the line L of molds on which the molds are transported.
  • Fig. 2 is a front schematic view of the automatic pouring machine 1 as in Fig. 1 .
  • a traversing carriage 4 is placed on the rail B so that it runs on it.
  • the rail B is placed on the floor.
  • a carriage for moving back and forth 6 is placed on the traversing carriage 4 so as to move perpendicularly to the rail B.
  • a rail (not shown) is placed on the upper plane of the traversing carriage 4 in the direction that is perpendicular to the rail B.
  • the carriage for moving back and forth 6 runs on that rail.
  • a device 8 for vertically moving the ladle is disposed on the carriage for moving back and forth 6.
  • the device 8 for vertically moving the ladle 2 moves a device 3 for tilting the ladle.
  • the device 3 for tilting the ladle tilts the ladle 2 that stores molten metal.
  • the ladle 2 can be moved in three dimensions.
  • the device 3 for tilting the ladle tilts the ladle 2 so as to pour the molten metal in the ladle 2 into the mold A.
  • the unit 20 for pressurizing the molten metal is disposed on the traversing carriage 4 of the automatic pouring machine 1.
  • the unit 20 for pressurizing the molten metal is located at a position so as to supply pressurized gas or a granular material to a mold A(2) on the line L of molds that is located downstream of, and next to, a mold A(1) into which molten metal is poured from the ladle 2 by means of the automatic pouring machine 1.
  • the unit 20 for pressurizing the molten metal can be easily installed in an existing pouring machine. Further, it does not interrupt the movement of the pouring unit 10.
  • Fig. 3 is a plan view that shows only the unit 20 for pressurizing the molten metal in the automatic pouring machine 1 that is disposed along the line L of molds.
  • Fig. 4 is a schematic side view of the automatic pouring machine 1, which is seen from the side of the unit 20 for pressurizing the molten metal.
  • a supporting structure 12 is disposed on the traversing carriage 4.
  • the upper part of the supporting structure 12 is structured by beams. Each of them has an axial direction that is perpendicular to the line L of molds.
  • a device 14 for moving the unit for pressurizing the molten metal back and forth is provided so as to move in the direction that is perpendicular to the line L of molds.
  • a device 16 for traversing the unit for pressurizing the molten metal is provided so as to move in parallel to the line L of molds.
  • a device 18 for vertically moving the unit for pressurizing the molten metal is provided.
  • the devices for supplying the pressurized gas and the granular material from the unit 20 for pressurizing the molten metal to the mold A are supported by the device 18 for vertically moving the unit for pressurizing the molten metal so as to move in three dimensions.
  • the unit 20 for pressurizing the molten metal has a hopper 22 that stores the granular material. It also has a mouth 26 that is hermetically connected to the sprue A1 of the mold A into which the molten metal has been poured, so as to feed the pressurized gas and the granular material to the mold A. It also has a piping 44 that connects the hopper 22 with the mouth 26. Further, as in Fig.
  • the unit 20 for pressurizing the molten metal has on the piping 44 a regulating chamber 24 that regulates the amount of the granular material to be supplied from the hopper 22 to the mouth 26, and a first ball valve 32 and a second ball valve 34 that act as on-off valves. Further, it has a second piping 30 that is connected to the mouth 26 to introduce the pressurized gas. It also has a first piping 28 that introduces the pressurized gas into the regulating chamber 24. The first piping 28 is equipped with a first on-off valve 36 that starts and stops the supply of the pressurized gas to the regulating chamber 24. The second piping 30 is equipped with a second on-off valve 38 that starts and stops the supply of the pressurized gas to the mouth 26.
  • the second piping 30 is also equipped with a flow control valve 40 that controls the flow of the pressurized gas to be supplied.
  • the mouth 26 is equipped with a pressure sensor 42 that measures the pressure of the pressurized gas so as to supply the pressurized gas to the mold A.
  • the hopper 22, the piping 44, the regulating chamber 24, and the mouth 26 constitute the pressurizing device 46 that supplies the pressurized gas and the pressurized granular material to the mold A.
  • the wording "the second piping 30 is connected to the mouth 26 to introduce the pressurized gas" means not only the case where the second piping 30 is directly connected to the mouth 26, but also the case where the second piping 30 is connected to the piping 44 to be indirectly connected to the mouth 26.
  • the unit 20 for pressurizing the molten metal has also a member 48 for constraining the mold, which member constrains the mold A not to misalign while the pressurized gas or the granular material is supplied by the unit 20 for pressurizing the molten metal.
  • the member 48 for constraining the mold has an air cylinder, and a constraining plate (not shown) that is attached to the air cylinder. It presses the mold A by means of the constraining plate to fix the mold A during the operation of the unit 20 for pressurizing the molten metal. Since the mold A is not misaligned, the mouth 26 is facilitated to be hermetically connected with the sprue A1. Incidentally, besides an air cylinder, the constraining plate may be pressed by any other known means.
  • Any of the traversing carriage 4, the carriage for moving back and forth 6, the device 8 for vertically moving the ladle, the device 14 for moving the unit for pressurizing the molten metal back and forth, the device 16 for traversing the unit for pressurizing the molten metal, and the device 18 for vertically moving the unit for pressurizing the molten metal is preferably moved by a servomotor, since it can thus be definitely moved to an accurate position.
  • a servomotor any known means other than a servomotor may be used to move any of them.
  • a plurality of molds A line up on the line L of molds.
  • the ladle 2 of the pouring unit 10 is filled with molten metal that is poured from a melting furnace, and so on.
  • the filled ladle 2 is moved by means of the traversing carriage 4 and the carriage for moving back and forth 6 to a horizontal position to pour the molten metal into the mold A on the line L of molds.
  • molten metal After molten metal is once poured from the ladle 2 into the mold A, it can be poured into the sprue A1 of any mold A that has the sprue A1 at the same position, without moving the ladle 2, by means of the traversing carriage 4 or the carriage for moving back and forth 6.
  • pouring molten metal starts at a predetermined time after the mold A is transported on the line L of molds by a distance that is equal to the length of the mold A.
  • the predetermined time may be 0 sec.
  • the ladle 2 When the position of the sprue A1 changes, the ladle 2 is moved by means of the traversing carriage 4 and the carriage for moving back and forth 6 to the position for pouring molten metal, based on the position of the sprue A1 that is detected by the position sensor 50. If the direction to pour molten metal changes because of any deterioration of the nozzle of the ladle 2 for pouring molten metal, the ladle 2 is moved by means of the traversing carriage 4 and the carriage for moving back and forth 6, even when no position of the sprue A1 changes, so as to accurately pour molten metal into the sprue A1.
  • the ladle 2 is elevated by means of the device 8 for vertically moving the ladle and tilted by means of the device 3 for tilting the ladle to start pouring molten metal into the sprue A1 of an empty mold A.
  • the amount of molten metal that has been poured is measured by a device for weighing, which is not shown.
  • the pouring operation is completed.
  • the flow of molten metal is preferably decreased before the predetermined amount of molten metal has been poured (the tilting angle is gradually decreased) so that the pouring operation is stopped just when the predetermined amount has been poured.
  • the predetermined amount of molten metal is an amount of molten metal that is required to cast a product, i.e., a product that is cast by the mold A. It is an amount of molten metal that is equal to the volume of a desired cavity plus the volume that will be caused by shrinkage plus an allowance.
  • a part of the molten metal may remain in the runner so that a space exists in an upper part of the desired cavity.
  • the molten metal is poured into the empty ladle A, by the unit 20 for pressurizing the molten metal the pressurized gas and the granular material are supplied to the mold A(2) into which the molten metal has been poured.
  • the position of the mold A(2) is detected by means of the position sensor 50.
  • the mouth 26 is moved to a position right above the sprue Al by means of the device 14 for moving the unit for pressurizing the molten metal back and forth and the device 16 for traversing the unit for pressurizing the molten metal.
  • the pressurized gas and the granular material After the pressurized gas and the granular material are once supplied, it can be supplied to the sprue A1 of any mold A that has the sprue A1 at the same position, without moving the mouth 26 by means of the device 14 for moving the unit for pressurizing the molten metal back and forth or by means of the device 16 for traversing the unit for pressurizing the molten metal.
  • supplying the pressurized gas and the granular material to the mold A that has the sprue A1 at the same position supplying them starts at a predetermined time after a mold A is transported on the line L of molds by the distance that is equal to the length of the mold A.
  • the predetermined time may be 0 sec.
  • the mouth 26 is moved again to a position right above the sprue A1.
  • the traversing carriage 4 and the carriage for moving back and forth 6 may move.
  • the unit 20 for pressurizing the molten metal may move before supplying the pressurized gas and the granular material to the mold A that has the sprue A1 at the same position. Since the position of the sprue is detected by means of the position sensor 50, the position of the mouth 26 can be quickly and accurately aligned with the position of the sprue A1.
  • the mouth 26 is moved right above the sprue A1 based on the position of the sprue A1 that is detected by the position sensor 50.
  • the pressurizing device 46 i.e., the mouth 26, is lowered by means of the device 18 for vertically moving the unit for pressurizing the molten metal.
  • the force of the device 18 for vertically moving the unit for pressurizing the molten metal to lower the mouth 26, for example, the torque of the servomotor reaches a predetermined value, the lowering operation is completed. Namely, the pressing force between the mouth 26 and the sprue A1 is caused to be equal to the predetermined value. So, the mouth 26 contacts the sprue A1 at an appropriate force. Thus the mouth 26 hermetically contacts the sprue A1. Further, neither the mold A nor the mouth 26 should be damaged.
  • a load sensor such as a load cell, which does not measure the force of the device 18 for vertically moving the unit for pressurizing the molten metal to lower the mouth 26, may be used to measure the force of the mouth 26 to press the mold A to complete the lowering operation.
  • the member 48 for constraining the mold lowers the constraining plate to fix the mold A(2).
  • the second on-off valve 38 is opened to supply the pressurized gas from the second piping 30 into the mold A(2) via the mouth 26.
  • the first on-off valve 36 is opened to introduce the pressurized gas from the first piping 28 to the regulating chamber 24.
  • the granular material in the regulating chamber 24 is supplied to the mold A(2) via the mouth 26.
  • the molten metal in the mold A(2) is squeezed into the desired cavity by means of the pressurized gas and the granular material.
  • the pressurizing device 46 As in Fig. 5 is discussed.
  • the first ball valve 32, the second ball valve 34, the first on-off valve 36, and the second on-off valve 38 are all closed.
  • the second on-off valve 38 is opened.
  • the flow control valve 40 is controlled to cause the detection by the pressure sensor 42 to be equal to a predetermined pressure
  • the pressurized gas is supplied by the second piping 30 to the mold A.
  • the predetermined pressure is a pressure by which molten metal is squeezed into the cavity. This pressure is maintained for a predetermined period of time.
  • a method for blowing the granular material into the mold A is discussed.
  • a predetermined amount of the granular material is stored in the regulating chamber 24 for the granular material.
  • the second ball valve 34 and the first on-off valve 36 are opened to feed the pressurized gas from the first piping 28. Since in this way the pressurized gas and the granular material are fed, the granular material accumulates at the end of the runner, to become a plug.
  • the end part of the molten metal which contacts the granular material, starts to solidify. Then the second ball valve 34, the first on-off valve 36, and the second on-off valve 38, are closed.
  • the unit 20 for pressurizing the molten metal is elevated so that the mouth 26 is separated from the mold A as in Fig. 8 .
  • the constraining plate of the member 48 for constraining the mold is elevated.
  • the first ball valve 32 is opened so that the granular material in the hopper 22 is introduced into the regulating chamber 24. After a predetermined period of time passes, the first ball valve 32 is closed so that a predetermined amount of the granular material are stored in the regulating chamber 24. Since the granular material is introduced from the hopper 22 to the regulating chamber 24 over a predetermined period of time, the predetermined amount of the granular material is regulated. The amount of the granular material that is stored in the regulating chamber 24, i.e., the combined weight of them, may be measured so that the first ball valve 32 is closed when the amount becomes equal to the predetermined amount.
  • the predetermined amount of the granular material is an amount of the granular material in the runner that prevents the molten metal that has been squeezed into the desired cavity from flowing back to the runner.
  • the molds A on the line L of molds are transported for the distance that is equal to the length of the molds A. Namely, as in Fig. 6 , the mold A(2), which is located in front of the pouring unit 10, is transported to the position in front of the unit 20 for pressurizing the molten metal and a new and empty mold A(1) is transported to the position in front of the pouring unit 10. In the pouring unit 10, molten metal is poured from the ladle 2 into the empty mold A(1). In the unit 20 for pressurizing the molten metal the pressurized gas and the granular material are supplied to the mold A(2) into which molten metal has just been poured by means of the pouring unit 10.
  • the pressurized gas and the granular material are preferably supplied by means of the unit 20 for pressurizing the molten metal immediately after molten metal is poured into the mold A by means of the pouring unit 10. Before the molten metal that has been poured into the mold A starts to solidify, it is squeezed into the desired cavity by means of the pressurized gas and the granular material.
  • the time when pouring molten metal into the first mold A(1) by the pouring unit 10 is completed is controlled to coincide with the time when supplying the pressurized gas and the granular material to the second mold A(2) by the unit 20 is completed, and the time when the plurality of molds A on the line L of molds start to be transported is controlled to coincide with these times.
  • the wording "the time ...
  • the pressurized gas that is used by the automatic pouring machine 1 is typically air, but is not limited to air.
  • the granular material that is used by the automatic pouring machine 1 is preferably heat-resistant granular material, such as refractory granular material, or sand, or steel balls, but are not limited to those items.
  • the mouth 26 is hermetically connected with the sprue A1 so as to pressurize the mold A by means of the pressurized gas and to supply the granular material to it.
  • the molten metal is squeezed into the desired cavity before it starts to solidify.
  • the granular material that has been put into the runner functions as a plug.
  • the molten metal is prevented from flowing back to the runner, etc.
  • the cavity can be quickly and definitely filled with molten metal. Since the granular material functions as a plug, the molten metal is prevented from flowing back.
  • a cast product after being shaken out, has no part that corresponds to the runner or the sprue.
  • the mold in which the granular material functions as a plug is transported from the unit 20 for pressurizing the molten metal, i.e., the automatic pouring machine 1, to cause the molten metal to solidify. That is, the automatic pouring machine 1 can promptly handle the next mold A. Thus the efficiency is good.
  • the molten metal that has been poured is squeezed into the cavity by means of the unit 20 for pressurizing the molten metal, which unit 20 is separated from the pouring unit 10.
  • pouring molten metal by means of the pouring unit 10 and supplying the pressurized gas and the granular material by means of the unit 20 can be simultaneously carried out. That is, the casting operation can be efficient.
  • both the power of pressurizing and the power of supplying the granular material are used to squeeze the molten metal into the cavity.
  • the molten metal can be quickly and definitely squeezed into the cavity.
  • pressurizing by means of the pressurized gas is carried out before supplying the granular material, the molten metal is prevented from being cooled by the granular material.
  • the molten metal is not cooled by the granular material. Since the molten metal is prevented from solidifying because of being cooled, it is quickly and easily squeezed into the cavity.
  • the unit 20 for pressurizing the molten metal is located so as to supply the pressurized gas and the granular material to the mold A(2) that is downstream of, and next to, the mold A(1) into which molten metal is poured from the ladle 2 of the pouring unit 10 on the line L of molds.
  • the unit for pressurizing the molten metal is easily added to an existing pouring unit so that the existing one is converted to an automatic pouring machine that has the ability to pressurize.
  • the unit 20 for pressurizing the molten metal supplies the pressurized gas and the granular material to the mold A(2) that is next to the mold A(1) into which molten metal is poured.
  • the pressurized gas and the granular material are supplied immediately after molten metal is poured into the mold A(2) by means of the pouring unit 10.
  • the molten metal in the mold A(2) can be squeezed into the desired cavity before it starts to solidify. That is, the pressure of the pressurized gas can be low and the amount of the granular material to be supplied can be small.
  • the unit 20 for pressurizing the molten metal is supported by the traversing carriage 4 of the pouring unit 10.
  • the pouring unit 10 is moved by means of the traversing carriage 4 and the carriage for moving back and forth 6 to align the ladle 2 with the sprue A1.
  • the device 14 for moving the unit for pressurizing the molten metal back and forth and the device 16 for traversing the unit for pressurizing the molten metal of the unit 20 for pressurizing the molten metal are moved to align the mouth 26 with the sprue A1.
  • the unit 20 for pressurizing the molten metal can be quickly and definitely moved and continuous operations can be conducted.
  • the unit 20 for pressurizing the molten metal may be located at a position other than on the traversing carriage 4 of the pouring unit 10. It may also be located on a supporting structure that is separate from the pouring unit 10.
  • the mouth 26 is moved, by means of the device 14 for moving the unit for pressurizing the molten metal back and forth and by means of the device 16 for traversing the unit for pressurizing the molten metal. It may be moved by having a part of the piping 44 be flexible. The part of the piping 44 may be downstream of the second ball valve 34. In this case, if the mouth 26 is largely moved by means of the flexibility of the piping 44, the curvature of the piping 44 becomes large, so that the granular material can hardly pass through it. Thus even though the piping 44 is flexible, the device 14 for moving the unit for pressurizing the molten metal back and forth and the device 16 for traversing the unit for pressurizing the molten metal are preferably provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Claims (10)

  1. Machine de coulée automatique (1) apte à la mise sous pression comprenant:
    une unité de coulée (10) qui comprend une poche (2) pour couler le métal en fusion dans un moule (A) et qui peut être transportée le long d'une ligne de moules (A1, A2) où une pluralité de moules est transportée; et
    une unité pour mettre sous pression le métal en fusion qui est supportée par l'unité de coulée et qui alimente en gaz sous pression et en matériau granulaire, le moule dans lequel le métal en fusion a été coulé par l'unité de coulée;
    l'unité de mise sous pression du métal en fusion comprenant une trémie (22) qui stocke le matériau granulaire, un bec (26) qui est raccordé hermétiquement à un jet de coulée du moulée qui est rempli du métal en fusion et ledit bec alimente le moule en gaz sous pression et en matériau granuleux, une chambre de régulation (24) qui régule la quantité de matériau granuleux à fournir depuis la trémie jusqu'au bec, un tuyau (28) qui introduit le gaz sous pression dans la chambre de régulation un tuyau (30) qui raccorde le bec pour introduire le gaz sous pression, et un élément (48) pour contraindre le moule, ledit élément contraint le moule de sorte qu'il demeure dans l'alignement; et
    l'unité pour mettre sous pression le métal en fusion alimentant le moule en gaz sous pression et en matériau granuleux parmi la pluralité de moules qui est situé à proximité du moule dans lequel l'unité de coulée fait couler le métal en fusion et qui est fixé par l'élément (48) pour contraindre le moule.
  2. Machine de coulée automatique apte à la mise sous pression selon la revendication 1, le bec pouvant se déplacer dans le sens qui est parallèle à, et dans le sens qui est perpendiculaire à, la ligne de moules où une pluralité de moule est transportée.
  3. Machine de coulée automatique apte à la mise sous pression selon la revendication 2, comprenant en outre un capteur de position (50) qui détecte une position du jet de coulée du moule afin de déplacer le bec dans la position du jet de coulée.
  4. Machine de coulée automatique apte à la mise sous pression selon la revendication 1, l'unité de coulée comporte un chariot transversal (4) qui se déplace parallèlement à la ligne de moules et un chariot aminé d'un mouvement de va-et-vient (6) qui se déplace perpendiculairement à la ligne de moules sur le chariot transversal, et
    l'unité pour la mise sous pression du métal en fusion est supportée par le chariot transversal.
  5. Machine de coulée automatique apte à la mise sous pression selon l'une quelconque des revendications 1 à 4, le matériau granuleux étant un sable de silice sec.
  6. Procédé de coulée automatique apte à la mise sous pression, le métal en fusion est coulé à partir d'une poche (2) qui est transportée le long d'une ligne de moules (A1, A2) où une pluralité de moules est transportée, et le gaz sous pression et une quantité prédéfinie d'un matériau granuleux étant fournis à partir d'une unité de mise sous pression du métal en fusion au moule qui est rempli de métal en fusion, l'unité de mise sous pression du métal en fusion comportant une trémie (22) qui stocke le matériau granulaire, un bec (26) qui est raccordé hermétiquement au jet de coulée du moule qui est rempli du métal en fusion et ledit bec alimente le moule en gaz sous pression et en matériau granuleux, une chambre de régulation (24) qui régule une quantité de matériau granuleux à fournir depuis la trémie jusqu'au bec, un premier tuyau (28) qui introduit le gaz sous pression dans la chambre de régulation, un second tuyau (30) qui raccorde le bec pour introduire le gaz sous pression, et un élément (48) pour contraindre le moule, ledit élément contraint le moule de sorte qu'il demeure dans l'alignement; et l'unité pour la mise sous pression le métal se déplaçant le long de la ligne de moules ensemble avec la poche, le procédé comprenant les étapes consistant à:
    déplacer la poche de sorte que le métal en fusion puisse être coulé dans le jet de coulée d'un premier moulé sur la ligne de moules où une pluralité de moules est transportée;
    couler le métal en fusion depuis la poche jusqu'au premier moule;
    raccorder hermétiquement le bec au jet de coulée d'un second moule qui est situé à proximité du premier moule et qui est rempli de métal en fusion;
    fixer le second moule par l'élément (48) pour contraindre le moule;
    alimenter en gaz sous pression provenant du second tuyau le second moule par l'intermédiaire du bec;
    réguler une quantité prédéfinie du matériau granuleux par la chambre de régulation, ledit matériau granuleux ayant été stocké dans la trémie; et
    alimenter en matériau granuleux régulé le second moule par l'intermédiaire du bec par alimentation en gaz sous pression provenant du premier tuyau la chambre de régulation.
  7. Procédé de coulée automatique apte à la mise sous pression selon la revendication 6, comprenant en outre les étapes consistant à:
    détecter une position du jet de coulée du second moule au moyen d'un capteur de position (50); et
    déplacer le bec en fonction de la position détectée.
  8. Procédé de coulée automatique apte à la mise sous pression selon la revendication 6, le moment où la coulée du métal en fusion dans le premier moule se termine, coïncidant avec le moment d'alimentation en gaz sous pression et en matériau granuleux du second moule et les moments coïncidant avec un moment où la pluralité de moules sur la ligne de moules commence à être transportée.
  9. Procédé de coulée automatique apte à la mise sous pression selon la revendication 6, si le jet de coulée du premier moule passe dans une position de jet de coulée du second moule, la poche est déplacée de manière à faire couler le métal en fusion dans le jet de coulée du premier moule, et ensuite dans l'unité de mise sous pression due métal en fusion qui a été déplacée ensemble avec le jet de coulée, le bec étant déplacé afin d'être raccordé hermétiquement au jet de coulée du second moule.
  10. Procédé de coulée automatique apte à la mise sous pression selon l'une quelconque des revendications 6 à 9, le matériau granuleux étant du sable de silice sec.
EP14906970.0A 2014-11-26 2014-11-26 Machine pour couler automatique et procédé de coulée automatique permettant la mise en pression Active EP3225332B1 (fr)

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PCT/JP2014/081199 WO2016084154A1 (fr) 2014-11-26 2014-11-26 Dispositif automatique de coulage de métal en fusion à fonction de mise sous pression et procédé de coulage de métal en fusion à fonction de mise sous pression

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WO2017078104A1 (fr) * 2015-11-04 2017-05-11 日立金属株式会社 Dispositif de coulée et procédé de coulée
CN108326257B (zh) * 2018-01-19 2019-08-27 湖北华力科技有限公司 一种汽车零部件铸造用工作平台及其使用方法
CN111215611B (zh) * 2020-02-21 2021-06-15 太原科技大学 一种消失模铸造自动浇注系统
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JP4678792B2 (ja) * 2009-04-02 2011-04-27 新東工業株式会社 自動注湯方法
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JP2011020176A (ja) * 2009-06-16 2011-02-03 Sintokogio Ltd 自動注湯方法およびその設備
EP3427865A1 (fr) * 2009-06-16 2019-01-16 Sintokogio, Ltd. Équipement de moulage
JP5414063B2 (ja) * 2010-03-29 2014-02-12 新東工業株式会社 鋳造方法、その砂型、およびその鋳造装置。
WO2014077021A1 (fr) * 2012-11-15 2014-05-22 新東工業株式会社 Procédé d'échantillonnage d'éprouvette, procédé de gestion de données d'éprouvette et modèle d'éprouvette
JP2015000404A (ja) * 2013-06-13 2015-01-05 藤和電気株式会社 溶湯充填装置および方法

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JP6324532B2 (ja) 2018-05-16
WO2016084154A1 (fr) 2016-06-02
EP3225332A4 (fr) 2018-05-23
MX2017006821A (es) 2017-09-27
KR20170091095A (ko) 2017-08-08
US20170326636A1 (en) 2017-11-16
CN107000048B (zh) 2019-02-22
CN107000048A (zh) 2017-08-01
EP3225332A1 (fr) 2017-10-04
JPWO2016084154A1 (ja) 2017-05-25

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