WO1998033612A1 - Dispositif d'alimentation de metal en fusion a une vitesse determinee - Google Patents

Dispositif d'alimentation de metal en fusion a une vitesse determinee Download PDF

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Publication number
WO1998033612A1
WO1998033612A1 PCT/JP1998/000416 JP9800416W WO9833612A1 WO 1998033612 A1 WO1998033612 A1 WO 1998033612A1 JP 9800416 W JP9800416 W JP 9800416W WO 9833612 A1 WO9833612 A1 WO 9833612A1
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WO
WIPO (PCT)
Prior art keywords
molten metal
pot
hot water
port
limit level
Prior art date
Application number
PCT/JP1998/000416
Other languages
English (en)
Japanese (ja)
Inventor
Syunji Mochizuki
Original Assignee
Tounetsu 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 Tounetsu Co., Ltd. filed Critical Tounetsu Co., Ltd.
Priority to JP10527550A priority Critical patent/JP3017540B2/ja
Priority to EP98901083A priority patent/EP0901854B1/fr
Priority to DE69833306T priority patent/DE69833306T2/de
Publication of WO1998033612A1 publication Critical patent/WO1998033612A1/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
    • B22D39/06—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by controlling the pressure above the molten metal

Definitions

  • the present invention relates to an apparatus for quantitatively supplying a molten metal of an aluminum alloy and other various metals that has been melted in a melting furnace and stored in a molten metal holding furnace to a machine such as a die-cast machine.
  • a hot water supply pipe that can be connected to a machine is extended from a molten metal holding furnace, and an electromagnetic pump is interposed in the middle of the hot water supply pipe.
  • the molten metal in the holding furnace is pumped through a hot water supply pipe to a machine.
  • the electromagnetic pump type supply device as described above, when the molten metal is a non-ferrous metal such as an aluminum alloy, and the magnetic metal component such as iron is mixed in the molten metal, the magnetic metal component is removed. Electromagnetic pumps are attracted and clogged inside, making it easy to break down.In addition, even if the pump is stopped, the flow of molten metal in the hot water supply pipe cannot be stopped immediately. In addition, there is a problem that the electromagnetic pump is expensive and the cost of the device is very high.
  • the present invention has been made in view of the above problems, and has as its object to provide a molten metal quantitative supply apparatus which can perform reliable quantitative supply with less failures and can be manufactured relatively inexpensively. Disclosure of the invention
  • the molten metal fixed-quantity supply device of the invention has a hot water supply port 2 and a drainage port at a bottom side.
  • a closed port 1 having a spout 3 and arranged at a predetermined height in a molten metal holding furnace 5, and a tapping pipe 7 connected to the spout 3 and connectable to the machine M,
  • An on-off valve 8 that moves up and down in the pot 1 by opening and closing drive means to open and close the hot water supply port 2 and a level for detecting the upper limit level L 1 and the lower limit level L 2 of the molten metal 6 in the pot 1
  • the detection means 10 and a gas (hereinafter, referred to as an “inert gas”) that does not easily react with the molten metal such as nitrogen gas or dry air are supplied into the pot 1 to pressurize the inside of the pot 1,
  • a pressurizing and depressurizing means 20 for discharging the inert gas supplied to the atmosphere and depressurizing the inside of the pot 1 is provided, and the
  • a pot having a hot water supply port and a hot water discharge port on the bottom side is arranged at a predetermined height position in the molten metal holding furnace, and the hot water supply port is disposed from the hot water supply port.
  • the molten metal in the pot is pressurized from the upper limit level to the lower limit level with an inert gas so that the molten metal in the pot is discharged from the discharge port through a tapping pipe.
  • the molten metal in the molten metal holding furnace can be reliably and quantitatively supplied to the machine, and the molten metal is supplied and discharged by pressurizing and depressurizing means using inert gas.
  • the magnetic metal component does not adhere to the inside of the apparatus and is clogged. It can be manufactured inexpensively and the cost can be reduced.
  • the molten metal fixed-quantity supply device of the invention has a closed port 1 having a hot water supply port 2 and a discharge port 3 on the bottom side, and disposed at a predetermined height position in the molten metal holding furnace 5;
  • a tapping pipe 7 connected to the drainage port 3 and connectable to the machine M, and an opening / closing valve 8 for moving the inside of the pot 1 up and down by the opening / closing drive means to open / close the hot water port 2 and the taphole 3 respectively.
  • Level detecting means 10 for detecting the lower limit level L 1 and the lower limit level L 2, and supplying an inert gas into the pot 1 to pressurize the inside of the pot 1 and to remove the inert gas in the pot 1.
  • a pressurizing and depressurizing means 40 for releasing the pressure inside the pot 1 by releasing it to the atmosphere is provided, and pressurizes the molten metal 6 flowing into the pot 1 from the hot water supply port 2 from its upper limit level L1 to its lower limit level L2.
  • the molten metal 6 in the pot 1 is discharged from the discharge port 3 through a tapping pipe.
  • an on-off valve for opening and closing the hot water supply port and an on-off valve for opening and closing the hot water outlet are provided side by side, and the inert gas pressurized and supplied into the pot is released to the atmospheric pressure and discharged to the inside of the pot. Opening and closing of the discharge port when the pressure in the molten metal holding furnace is switched from the pressure side to the pressure reduction side to flow the molten metal into the pot. Since the molten metal flows into the pot from the hot water supply port when the valve is activated and the drain is closed, the amount of molten metal flowing into the pot can be regulated accurately. This makes it possible to repeatedly and accurately maintain the amount of hot water per unit from the pot.
  • the molten metal fixed-quantity supply device of the invention has a closed port 1 having a hot water supply port 2 and a discharge port 3 on the bottom side, and arranged at a predetermined height position in the molten metal holding furnace 5;
  • a tapping pipe 7 connected to the drain port 3 and connectable to the machine M;
  • an opening / closing valve 8 for moving up and down in the pot 1 by opening / closing drive means to open / close the hot water port 2 and the drain port 3 respectively;
  • level detection means 10 for detecting the upper limit level L 1 and the lower limit level L 2 of the molten metal 6 in the pot 1, and supplying an inert gas into the pot 1 to make the inside of the pot 1
  • Pressurizing and depressurizing means 40 for depressurizing the inside of the pot 1 by pressurizing and forcibly sucking the inert gas in the pot 1, and dissolving the molten metal 6 flowing into the pot 1 from the hot water supply port 2.
  • the hot water 6 is discharged from the hot water outlet 3 through the hot water pipe, and the open / close valve for opening and closing the hot water supply port and the open / close valve for opening and closing the hot water outlet are provided in parallel.
  • the system is provided with a pressurizing and depressurizing means for forcibly sucking the inert gas supplied under pressure into the pot to depressurize the inside of the pot.
  • a fourth aspect of the present invention is the molten metal fixed-quantity supply device according to any one of the first to third aspects, wherein the opening and closing drive means includes fluid pressure cylinders 9 and 39 erected at the upper end of the pot 1.
  • the rod-shaped on-off valves 8 and 38 are connected to piston rods 9 a and 39 a of the fluid pressure cylinders 9 and 39.
  • a fluid pressure cylinder erected at the upper end of the port is used as a drive means of the on-off valve, and the rod-shaped on-off valve is connected to this cylinder.
  • Claim 5 which can simplify the structure of the opening / closing drive means and make it compact can provide the molten metal fixed-quantity supply device according to any one of Claims 1 to 3, Valves 8, 38 and tapping pipe 7 are each formed by ceramic.
  • the pot, the opening / closing valve and the tapping pipe can be obtained at low cost by forming the pot, the opening / closing valve and the tapping pipe by using ceramics. It can be.
  • a sixth aspect of the present invention is the molten metal fixed-quantity supply device according to any one of the first to third aspects, wherein the hot water supply port 2 of the pot 1 has a ceramic filter at an inlet side thereof. 26 is attached.
  • FIG. 1 is a vertical sectional side view showing a molten metal quantitative supply device according to a first embodiment of the present invention.
  • FIG. 2 is a plan view of the molten metal feeder shown in FIG.
  • FIG. 3 is a partially enlarged cross-sectional view of the molten metal fixed-rate supply device shown in FIG.
  • FIG. 4 is a longitudinal side view showing a molten metal supply device according to a second embodiment of the present invention.
  • FIG. 5 is a partially enlarged cross-sectional view of the apparatus for quantitatively supplying molten metal shown in FIG.
  • FIG. 6 is a longitudinal side view showing a molten metal supply device according to a third embodiment of the present invention.
  • FIG. 7 is an enlarged vertical sectional view showing one embodiment of the level detecting means.
  • FIG. 1 shows a molten metal constant feeder according to a first embodiment of the present invention
  • FIG. 2 is a plan view thereof
  • FIG. 3 is a partially enlarged sectional view.
  • the first embodiment shows a specific example in a case where a molten metal mainly composed of an aluminum alloy is supplied to a machine.
  • reference numeral 1 denotes a bottomed cylindrical pot provided with a hot water supply port 2 and a hot water discharge port 3 on the bottom side, which is formed by ceramics, and which has a required upper end 1a.
  • the support 4 made of a heat-resistant material in a sealed state and hangs downward from the lower surface of the support 4 to form an open-type It is inserted into the hot water holding furnace 5 at a predetermined height.
  • a molten metal 6 of an aluminum alloy melted in the metal melting furnace is almost fully stored, and the pot 1 is immersed in the molten metal 6 as shown in Fig. 1. It will be in a state where it has been set.
  • Reference numeral 7 denotes a tapping pipe connected to the discharge port 3 of the pot 1 and connectable to a pouring port (not shown) of a machine (for example, a die caster machine) M.
  • a vertical pipe section 7a formed of ceramic and extending upward from the outer end of the drain port 3 along the outer surface of the pot 1, and connected to the upper end of the vertical pipe section 7a.
  • a horizontal pipe section 7c connected to the bend section 7b and extending horizontally to the machine M side. The tip 7d of c is pressed against the pouring port of the machine M.
  • a heater 1 is attached to the tapping pipe 7 so that the molten metal 6 from the pot 1 can be supplied at an appropriate temperature.
  • Reference numeral 8 denotes an opening / closing valve for opening and closing the hot water supply port 2 of the pot 1 by moving up and down a predetermined stroke in the pot 1 by a fluid pressure cylinder 9 as opening / closing drive means.
  • a hollow valve stem 8b made of ceramics having a valve body 8a having an arc-shaped cross section at the lower end is provided.
  • the fluid pressure cylinder 9 is erected on the support 4, and its piston rod 9 a penetrates the support 4 in a sealed state so as to be slidable, and has a valve stem in the support 4. Connected to 8b.
  • valve rod 8b due to the extension operation of the cylinder 9 causes the valve element 8a to closely engage with the lined gate 2, closing the water supply port 2 and causing the cylinder 2 to close.
  • the valve rod 8b is moved upward by the contraction operation of 9, the valve body 8a is detached from the hot water supply port 2, and the hot water supply port 2 is opened.
  • Reference numeral 10 denotes level detection means for detecting the upper limit level L 1 and the lower limit level L 2 of the molten metal 6 in the pot 1.
  • L 1 is the level of the molten metal surface when the molten metal starts to flow into the machine, and may be the same as the molten metal surface level Lo of the molten metal 6 (the molten metal 6 outside the pot 1) stored in the molten metal holding furnace 5. Many.
  • the lower limit level L 2 is the level of the molten metal surface in Pot 1 at the time when the tapping into the machine has been completed.
  • a flange body 12 is attached via a base plate 11 to the center of the upper surface of a support 4 located directly above the pot 1.
  • the float shaft 14 is slidably passed through a guide sleeve 13 in which the flange body 12, the base plate 11 and the support body 4 are vertically penetrated and fixed.
  • the float 15 is attached to the lower end of the float shaft 14 located in the pot 1, and the object 16 to be detected is attached to the upper end.
  • a transparent cylindrical cover 17 having a closed upper end is provided on the flange 12 so as to cover the float shaft 14 and the object 16 to be detected.
  • two upper and lower photoelectric switches 18, 19 each comprising a projector 18 a, 19 a and a receiver 18 b, 19 b are respectively attached to the object 16.
  • the upper photoelectric switch 18 detects the upper limit level L 1 via the object 16 to be detected, and the lower photoelectric switch 19 Detects the lower limit level L 2 via the subject 16.
  • the base plate 11, flange body 12, guide sleeve 13, float shaft 14, float 15, object to be detected 16 and cylindrical cover 17 are each made of ceramic.
  • the detection means of the detection target 16 is not limited to the photoelectric switches 18 and 19, and a proximity switch or the like can be applied.
  • the above-mentioned level detecting means 10 employs a float type detecting means.
  • a means for directly measuring the level of the molten metal 6 in the pot 1 by a laser or an electrostatic type A variable capacity type may be adopted.
  • reference numeral 20 denotes an inert gas (a gas that is difficult to react with a molten metal such as nitrogen gas or dry air) supplied to the inside of the pot 1 to pressurize the inside of the pot 1.
  • This is a pressurizing and depressurizing means for discharging the supplied inert gas to the atmosphere to depressurize the inside of the pot 1.
  • the pressurizing / depressurizing means 20 is provided in gas supply / discharge holes 21 (see FIGS. 1 and 2) provided so as to penetrate the support 4 from the base plate 11 and communicate with the inside of the port 1.
  • a pressurizing source 22 composed of a tank containing an inert gas and a pump for pumping the gas is connected by a gas line 23 and a pressure regulating valve 24 is connected to the line 23.
  • an electromagnetic switching valve 25 has a control unit of the fluid pressure cylinder 9 and photoelectric switches 18 and 19 of the level detecting means 10. Are electrically connected to each other. It should be noted that the pressure in the pot 1 may be arbitrarily changed by using an electrically controllable pressure control valve as the pressure regulating valve 24.
  • the switching valve 25 is operated so as to open the flow path from the pressurizing source 22 to the gas supply / discharge hole 21.
  • the pressure inside the port 1 is reduced, the flow from the pressurizing source 22 is cut off and the gas lined exhaust hole 21 is switched to the atmosphere open flow path. All that is required is to operate the valve.
  • the pressure in the pot 1 can be adjusted by the pressure adjusting valve 24.
  • the pressure source 22 may be a high-pressure cylinder filled with an inert gas under pressure.
  • a ceramic filter for removing oxides, dust and other impurities mixed in the molten metal 6 in the molten metal holding furnace 5 is provided at the inlet side of the hot water supply port 2 of the pot 1.
  • Filter 26 is installed. As shown in FIG. 3, the filter 26 is formed by a ceramic into a box, hemisphere, or other desired shape in which each wall has a porous shape. The porous state is about 10 to 60 mesh.
  • a locking portion 27 is provided on the lower surface of the port 1, and the flange 26a at the upper end of the filter 26 is locked to this. And good. Note that this filter 26 is required. It may be attached as needed.
  • the tapping pipe 7 can be horizontally moved integrally with the pot 1 by horizontal moving means 28 of a hydraulic cylinder type. That is, as shown in FIGS. 1 and 2, the horizontal moving means 28 moves the support frame 30 from the upper end of the base frame 29 provided adjacent to the molten metal holding furnace 5 above the molten metal holding furnace 5. And a plurality of wheels attached to the support 4 via brackets 31 on guide rails 30a and 30a formed on both sides in the longitudinal direction of the support frame 30. 32 is rotatably engaged, and the support 4 is connected to the piston rod 33 a of the hydraulic cylinder 33 installed on the base frame 29 via the connecting rod 33 b.
  • the support body 4 and the pot 1 and the tapping pipe 7 integrally provided with the support body 4 can be horizontally moved in the longitudinal direction of the support frame 30 by the expansion and contraction operation of the cylinder 33. it can. Accordingly, by appropriately expanding and contracting the fluid pressure cylinder 33, the distal end 7d of the tapping pipe 7 is pressed against the pouring port (not shown) of the machine M to be surely brought into contact. It can be done.
  • the interior of the pot 1 is opened to the atmosphere, and as shown in FIGS. 1 and 3, the on-off valve 8 moves upward (opens) to open the hot water supply ⁇ 2, and then the molten metal 6 in the molten metal holding furnace 5 is opened.
  • the level detecting means 10 detects that the float 15 rises with the rise of the molten metal level in the pot 1 and the object 16 moves up to the position corresponding to the upper limit level L 1 via the float shaft 14, The object 16 is detected by the photoelectric switch 18.
  • the fluid pressure cylinder 9 is extended, the opening / closing valve 8 is moved down to close the hot water supply port 2, and at the same time, the pressurizing side of the pressurizing and depressurizing means 20 is operated, and 1 O
  • An inert gas is supplied to the upper part of the pot 1 from the supply / discharge hole 21.
  • the supply of this gas pressurizes the molten metal 6 in the pot 1, and the molten metal 6 is discharged from the discharge port 3 to the tapping pipe 7.
  • the photoelectric switch 19 detects the object 16 that has dropped to the corresponding position.
  • the electromagnetic switching valve 25 is operated, the pressurizing and depressurizing means 20 is operated on the depressurizing side, and the inert gas supplied into the port 1 is discharged from the electromagnetic switching valve 25.
  • the fluid is discharged to the atmosphere through the open passage, and at the same time, the fluid pressure cylinder 9 contracts and moves the opening / closing valve 8 upward to open the hot water supply port 2, whereby the molten metal 6 in the molten metal holding furnace 5 is discharged. After that, the above operation is repeated.
  • the molten metal 6 in the pot 1 is pressurized and lowered from the upper limit level L1 to the lower limit level L2 by the inert gas supplied into the pot 1.
  • a constant amount corresponding to the product of the interval length between the two levels L 1 and L 2 and the cross-sectional area inside the pot 1 is discharged from the tapping pipe 7. Therefore, if the length of the interval between the two levels L 1 and L 2 is kept constant, the above series of operations are repeated a plurality of times to supply the molten metal 6 in an amount equivalent to the plurality of times. be able to.
  • the discharge amount of the molten metal 6 can be freely changed by changing the position of the lower photoelectric switch 19 (detection means) of the level detection means 10 in the vertical direction.
  • the molten metal 6 in the molten metal holding furnace 5 is reduced by the amount of the molten metal 6 in the pot 1 being discharged through the tapping pipe 7, and the molten metal holding furnace 5
  • the surface level Lo of the molten metal 6 in 5 will gradually decrease. Accordingly, in order to keep the distance between the upper limit level L1 and the lower limit level L2 constant, the internal volume of the molten metal holding furnace 5 should be as large as possible, and the level of the molten metal in the molten metal holding furnace 5 should be lowered. It is necessary to replenish the molten metal 6 in the molten metal holding furnace 5 while detecting the molten metal surface level Lo sequentially. You.
  • FIGS. 4 and 5 show a molten metal quantitative supply device according to a second embodiment of the present invention.
  • This device is different from the first embodiment in the configuration of the device.
  • an opening / closing valve 38 that operates up and down by a fluid pressure cylinder 39 (opening / closing drive means) is provided so as to open and close the discharge port 3 of the pot 1.
  • Other configurations are the same as those of the first embodiment, and therefore, the same components are denoted by the same reference numerals and description thereof will be omitted. That is, the opening / closing valve 38 for the hot water outlet 3 is almost the same as the opening / closing valve 8 for the hot water inlet 2, and as shown in FIG.
  • the hydraulic cylinder 39 is provided upright in parallel with the hydraulic cylinder 9 of the on-off valve 8 for the gate gate lined on the support 4, and the piston rod 39 a is provided on the support 4. 4 is slidably penetrated in a sealed state, and is connected to the valve rod 38 b in the support 4.
  • the valve stem 38b is moved downward by the extension operation of the cylinder 39, the valve element 38a is closely engaged with the drain port 3 to close the drain port 3, and the cylinder 39 is closed.
  • the valve rod 38 b is moved upward by the contraction operation of the valve 39, the valve element 38 a is detached from the drain port 3, and the drain port 3 is opened.
  • the on-off valve 38 is also formed of ceramic.
  • the pressurizing and depressurizing means 20 is connected to a gas pressure source 22 composed of a tank containing an inert gas and a pump for pumping the gas, for example.
  • the valve 23 is provided with a pressure regulating valve 24 and an electromagnetic switching valve 25, and the electromagnetic switching valve 25 is a control unit and a level detecting means of the fluid pressure cylinder 9. They are electrically connected to 10 photoelectric switches 18 and 19, respectively.
  • the switching valve 25 may be operated so as to open a flow path from the pressurizing source 22 to the gas filling drain 21.
  • depressurizing the inside of Pot 1 shut off the flow path from pressurizing source 22.
  • the switching valve may be operated so that the gas supply / discharge hole 21 communicates with the air release passage.
  • the pressure in the pot 1 can be adjusted by the pressure adjusting valve 24.
  • the pressure in the pot 1 may be arbitrarily changed by using a pressure control valve that can be electrically controlled as the pressure adjusting valve 24.
  • the pressurizing source 22 may be a high-pressure cylinder filled with an inert gas under pressure. The above operation is the same as in the first embodiment.
  • the hot water supply opening / closing valve 8 moves upward, the hot water supply opening 2 is opened, and the hot water supply opening / closing valve 3 is opened. 8 moves downward and the drain outlet 3 is closed, and the pressure reducing and depressurizing means 20 is operated to release the inside of the pot 1 to the atmospheric pressure by activating the pressure reducing side 20.
  • the level detecting means 10 detects this. That is, when the float 15 rises with the rise of the molten metal 6 and the object 16 moves up to a position corresponding to the upper limit level L 1 via the float shaft 14, the object 16 Is detected by the photoelectric switch 18.
  • the hydraulic cylinder 9 extends to move the on-off valve 8 downward, closing the hot water supply port 2 and at the same time, the hydraulic cylinder 39 contracts to move the on-off valve 38 upward.
  • the outlet 3 is opened, and at the same time, the operation of the pressurizing and depressurizing means 20 is switched to the pressurizing side, so that the inert gas is supplied to the upper part of the pot 1 from the gas supply / discharge hole 21.
  • the molten metal 6 in the pot 1 is pressurized and discharged from the outlet 3 to the tapping pipe 7, and the level of the molten metal 6 in the pot 1 reaches the predetermined lower limit level L2.
  • the photoelectric switch 19 detects the object 16 descending to the corresponding position.
  • the fluid pressure cylinder 9 contracts to move the on-off valve 8 upward, and the hot water inlet
  • the fluid pressure cylinder 39 expands and moves the on-off valve 38 down to close the drain port 3
  • the pressure reducing side of the pressure reducing means 20 operates, and the pot
  • the inert gas supplied into the furnace 1 is released from the gas supply / discharge port 21 to the atmosphere through the switching valve 25, and the molten metal 6 in the molten metal holding furnace 5 flows into the port 1. I do. Thereafter, the above operation is repeated.
  • the molten metal 6 in the pot 1 is pressurized and lowered from the upper limit level L1 to the lower limit level L2 by the inert gas supplied into the pot 1, whereby A certain amount of water corresponding to the product of the interval length between the two levels L 1 and L 2 and the cross-sectional area inside the pot 1 will be discharged from the tapping pipe 7, and therefore the above series of operations must be repeated several times.
  • the molten metal 6 in a quantity corresponding to the multiple times can be supplied quantitatively.
  • the amount of the molten metal 6 can be freely changed by changing the positions of the upper and lower photoelectric switches 18 and 19 (detection means) of the level detection means 10 in the vertical direction. In this case, any of the upper and lower photoelectric switches 18 and 19 may be changed.
  • the switching valve 25 of the pressurizing and depressurizing means 20 is switched by a detection signal to operate on the pressure reducing side, and the molten metal holding furnace 5 is operated.
  • the on-off valve 38 on the drain port 3 side is operated and the molten metal 6 flows into the pot 1 from the hot water supply port 2 with the drain port 3 closed.
  • the amount of molten metal 6 flowing into the pot 1 can be accurately regulated, for example, a part of the molten metal 6 flowing into the pot 1 is discharged to the outside from the drain hole 3. There is no such thing.
  • FIG. 6 shows a molten metal quantitative supply device according to a third embodiment of the present invention.
  • This device is different from the second embodiment in that the inert gas supplied into the pot 1 is forcibly supplied. Suction to the outside so that the pressure inside the pot 1 is reduced. This is the point that the pressure / decompression means 40 is provided.
  • the other configuration is the same as that of the second embodiment, and the same components are denoted by the same reference numerals and description thereof will be omitted.
  • the pressurizing and depressurizing means 40 includes an inert gas tank 34 storing an inert gas in a gas supply / discharge hole 21 communicating with the inside of the port 1, and the tank 3.
  • a gas line 36 is connected to an inert gas pumping pump 35 for pumping the inert gas in 4, and a pressure regulating valve 37 and an electromagnetic switching valve 41 are provided on this line 36.
  • the electromagnetic switching valve 41 and the inert gas tank 34 are connected by a bypass line 42, and a suction pump 43 and a pressure regulating valve 44 are interposed in the bypass line 42.
  • the electromagnetic switching valve 41 is electrically connected to the control unit of the fluid pressure cylinders 9 and 39 and the photoelectric switches 18 and 19 of the level detecting means 10 respectively. I have.
  • the bypass line 42 is shut off and the flow path from the inert gas pressure pump 35 to the gas supply / discharge hole 21 is opened.
  • the pressure inside the port 1 is reduced, the flow path from the pressure pump 35 to the gas supply / discharge hole 21 is cut off and the bypass line 42 is closed.
  • the switching valve 41 may be operated to open.
  • the pressure adjustment and the pressure reduction in the pot 1 can be performed by the pressure adjusting valves 37 and 44.
  • the hot-water opening / closing valve 8 moves upward, the hot-water opening 2 opens, and the hot-water opening / closing valve 38 moves downward, so that the hot-water opening 3 is closed.
  • the depressurizing side of the pressurizing and depressurizing means 40 is operated to suck the inside of the pot 1 toward the outside, so that the molten metal 6 in the molten metal holding furnace 5 enters the pot 1 from the hot water supply port 2.
  • the level detecting means 10 I do that is, when the float 15 rises with the rise of the molten metal 6 and the object 16 moves up to the position corresponding to the upper limit level L 1 via the float shaft 14, this detected The body 16 is detected by the photoelectric switch 18.
  • the hydraulic cylinder 9 In response to this detection signal, the hydraulic cylinder 9 extends to move the on-off valve 8 downward, closing the hot water supply port 2 and at the same time, the hydraulic cylinder 39 contracts to move the on-off valve 38 upward.
  • the discharge port 3 is opened, and at the same time, the operation of the pressurizing and depressurizing means 40 is switched to the pressurizing side, so that the inert gas is supplied from the gas supply and discharge holes 21 to the upper portion of the pot 1.
  • the molten metal 6 in the pot 1 is pressurized and discharged from the outlet 3 to the tapping pipe 7, and the level of the molten metal 6 in the pot 1 reaches the predetermined lower limit level L2.
  • the photoelectric switch 19 detects the object 16 descending to the corresponding position.
  • the hydraulic cylinder 9 contracts to move the on-off valve 8 upward to open the hot water supply port 2, and at the same time, the hydraulic cylinder 39 extends to move the on-off valve 38 downward.
  • the drain port 3 is closed, and at the same time, the depressurizing side of the pressurizing and depressurizing means 40 is operated, so that the inert gas supplied into the port 1 is discharged from the gas supply / discharge hole 21 through the switching valve 41.
  • the gas is returned to the inert gas tank 34 through the bypass line 42, whereby the molten metal 6 in the molten metal holding furnace 5 flows into the pot 1. Thereafter, the above operation is repeated.
  • the molten metal 6 inside the pot 1 is pressurized and lowered from the upper limit level L1 to the lower limit level L2 by the inert gas supplied into the pot 1, A certain amount of water corresponding to the product of the interval length between the two levels L 1 and L 2 and the cross-sectional area inside the pot 1 will be discharged from the tapping pipe 7, and therefore the above series of operations must be repeated several times.
  • the discharge amount of the molten metal 6 can be freely set by changing the position of the upper and lower photoelectric switches 18 and 19 (detection means) of the level detection means 10 in the vertical direction.
  • the point that can be changed is the same as in the first and second embodiments. In this case, any of the upper and lower photoelectric switches 18 and 19 may be changed as in the above-described embodiment.
  • an on-off valve 8 for opening and closing the hot water supply port 2 and an on-off valve 38 for opening and closing the hot water outlet 3 are provided side by side, and the inert gas pressurized and supplied into the pot 1 is forcibly externally supplied.
  • the apparatus is a device for supplying a molten metal such as a magnesium molten metal. Needless to say, it can be used.
  • a molten metal such as a magnesium molten metal.
  • the pot, opening / closing valve or tapping pipe can be made of iron.
  • the molten metal in the molten metal holding furnace can be automatically and reliably supplied to the machine in a constant quantity, and the molten metal is pressurized and depressurized by using an inert gas.
  • the molten metal is a non-ferrous metal such as aluminum alloy
  • the magnetic metal component can be supplied to the inside of the device as in the case of using a magnetic pump. It does not become clogged by suction, has few failures, and can be manufactured relatively inexpensively and at low cost.
  • the use of inert gas oxidizes the metal surface. 1 ⁇
  • the tapping can be performed without lowering the temperature of the molten metal, the temperature of the melting furnace and the holding furnace can be lowered, which contributes to energy saving and enables a high-quality structure.

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  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

Ce dispositif d'alimentation de métal en fusion comprend un creuset scellé (1), lequel présente un orifice d'alimentation (2) de métal en fusion ainsi qu'une orifice d'évacuation (3) de ce métal et est placé dans un four (5) contenant du métal en fusion, un tuyau (7) d'évacuation de métal en fusion, relié à l'orifice d'évacuation (3), une paire de soupapes (8, 38) conçues pour se déplacer verticalement dans le creuset (1) et ouvrir et fermer l'orifice d'alimentation (2) et l'orifice d'évacuation (3), des moyens de détection de niveau (10) servant à détecter les niveaux limites supérieur et inférieur (L1, L2) du métal en fusion (6) situé dans le creuset (1), ainsi que des moyens de mise sous pression et de mise hors pression (20) de l'intérieur du creuset (1). La mise sous pression consiste à fournir un gaz inerte à l'intérieur du creuset, et la mise hors pression consiste à évacuer ce gaz inerte vers l'atmosphère ou à aspirer ce gaz inerte à partir du creuset (1), le métal en fusion (6) qui s'écoule depuis l'orifice d'alimentation (2) pour entrer dans le creuset (1) étant mis sous pression lorsqu'il atteint le niveau limite supérieur (L1) et jusqu'à ce qu'il atteigne le niveau limite inférieur (L2); ainsi, le métal en fusion (6) situé dans le creuset (1) est évacué par l'orifice correspondant (3), à travers le tuyau d'évacuation de métal en fusion (7).
PCT/JP1998/000416 1997-02-04 1998-01-30 Dispositif d'alimentation de metal en fusion a une vitesse determinee WO1998033612A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10527550A JP3017540B2 (ja) 1997-02-04 1998-01-30 溶湯定量供給装置
EP98901083A EP0901854B1 (fr) 1997-02-04 1998-01-30 Dispositif d'alimentation de metal en fusion a une vitesse determinee
DE69833306T DE69833306T2 (de) 1997-02-04 1998-01-30 Vorrichtung zum zuführen von metallschmelze in vorgegebenen mengen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9/21159 1997-02-04
JP2115997 1997-02-04

Publications (1)

Publication Number Publication Date
WO1998033612A1 true WO1998033612A1 (fr) 1998-08-06

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EP (1) EP0901854B1 (fr)
DE (1) DE69833306T2 (fr)
WO (1) WO1998033612A1 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
GB2338668A (en) * 1998-06-27 1999-12-29 John Campbell Dispensing apparatus and method
US6841120B2 (en) 2002-06-13 2005-01-11 Alotech Ltd. Llc Dispensing apparatus and method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19813416C2 (de) * 1998-03-26 2000-01-05 Univ Hannover Verfahren und Vorrichtung zur Handhabung von Schmelzen, insbesondere von Magnesium und Magnesiumlegierungen
JP4292585B2 (ja) * 2007-04-09 2009-07-08 新東工業株式会社 低圧鋳造装置および不活性ガスの充満方法
DE102009051879B3 (de) * 2009-11-04 2011-06-01 Baumgartner, Heinrich G. Metall-Druckgussmaschine

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JPS60115357A (ja) * 1983-11-25 1985-06-21 Nachi Fujikoshi Corp 溶湯定量汲出し装置
JPS63252667A (ja) * 1987-04-07 1988-10-19 Meichiyuu Seiki Kk 溶融金属注湯装置
JPH04371359A (ja) * 1991-06-17 1992-12-24 Kobe Steel Ltd 溶湯の給湯方法及び給湯装置
JPH0716737A (ja) * 1993-06-30 1995-01-20 General Motors Corp <Gm> 溶湯ポンプ装置及び溶湯鋳造装置
JPH0810937A (ja) * 1994-06-24 1996-01-16 Hirochiku:Kk 非鉄金属溶湯の定量注湯装置

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JPS60115357A (ja) * 1983-11-25 1985-06-21 Nachi Fujikoshi Corp 溶湯定量汲出し装置
JPS63252667A (ja) * 1987-04-07 1988-10-19 Meichiyuu Seiki Kk 溶融金属注湯装置
JPH04371359A (ja) * 1991-06-17 1992-12-24 Kobe Steel Ltd 溶湯の給湯方法及び給湯装置
JPH0716737A (ja) * 1993-06-30 1995-01-20 General Motors Corp <Gm> 溶湯ポンプ装置及び溶湯鋳造装置
JPH0810937A (ja) * 1994-06-24 1996-01-16 Hirochiku:Kk 非鉄金属溶湯の定量注湯装置

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See also references of EP0901854A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2338668A (en) * 1998-06-27 1999-12-29 John Campbell Dispensing apparatus and method
US6841120B2 (en) 2002-06-13 2005-01-11 Alotech Ltd. Llc Dispensing apparatus and method

Also Published As

Publication number Publication date
EP0901854A1 (fr) 1999-03-17
EP0901854A4 (fr) 2002-01-30
DE69833306D1 (de) 2006-04-13
EP0901854B1 (fr) 2006-01-25
DE69833306T2 (de) 2006-09-07

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