WO1998033612A1 - Apparatus for supplying molten metal at predetermined rate - Google Patents

Apparatus for supplying molten metal at predetermined rate 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
Authority
WO
WIPO (PCT)
Prior art keywords
molten metal
pot
hot water
port
limit level
Prior art date
Application number
PCT/JP1998/000416
Other languages
French (fr)
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 DE69833306T priority Critical patent/DE69833306T2/en
Priority to EP98901083A priority patent/EP0901854B1/en
Priority to JP10527550A priority patent/JP3017540B2/en
Publication of WO1998033612A1 publication Critical patent/WO1998033612A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00Equipment for supplying molten metal in rations
    • B22D39/06Equipment 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

A molten metal supply apparatus provided with a sealed pot (1) having a molten metal supplying port (2) and a molten metal discharging port (3) and disposed in a molten metal retaining furnace (5), a molten metal discharging pipe (7) connected to the molten metal discharging port (3), a pair of valves (8, 38) adapted to be moved vertically in the pot (1) and open and close the molten metal supplying port (2) and a molten metal discharging port (3), a level detecting means (10) for detecting upper and lower limit levels (L1, L2) of a molten metal (6) in the pot (1), and a pressurization and depressurization means (20) for pressurizing the interior of the pot (1) by supplying an inert gas to the interior thereof, or depressurizing the interior of the pot (1) by discharging the inert gas to the atmospheric air or forcibly sucking the inert gas from the pot (1), the molten metal (6) flowing from the molten metal supplying port (2) into the pot (1) being pressurized from the upper limit level (L1) to the lower limit level (L2), whereby the molten metal (6) in the pot (1) being discharged from the molten metal discharging port (3) through the molten metal discharge pipe (7).

Description

明 細 書 溶湯定量供給装置 技術分野  Description Molten metal feeder Technical field
本発明は、 溶解炉で溶解されて溶湯保持炉内に貯められたアル ミ 合金 その他各種金属の溶湯を、 ダイ キャ ス トマシ ン等の铸造機へ定量供袷す るための装置に関する ものである。 背景技術  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. . Background art
従来の溶湯供給装置と して、 溶湯保持炉から铸造機に接続可能な給湯 管を延出する と共に、 この給湯管の途中に電磁ポ ンプを介装し、 この電 磁ポ ンプによ り、 保持炉内の溶湯を給湯管を通じて铸造機へ圧送するよ う に したものがある。  As a conventional molten metal supply device, 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. In some cases, the molten metal in the holding furnace is pumped through a hot water supply pipe to a machine.
上記のよ う な電磁ポ ンプ式の供給装置による と、 溶湯がアル ミ 合金等 の非鉄金属である場合に、 溶湯中に鉄等の磁性金属成分が混入している と、 その磁性金属成分が電磁ポ ンプ内部に吸着して詰ま りを生じ、 故障 し易く なり、 またポ ンプを停止しても給湯管内の溶湯の流れを直ちに止 める こ とができないため、 定量性の点で問題があり、 更に電磁ポ ンプが 高価で装置のコス トが非常に高く つ く という問題があった。  According to 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.
本発明は、 上記の問題点に鑑み、 故障が少な く 、 確実に定量供給を行 える上、 比較的安価で製作可能な溶湯定量供給装置を提供する こ とを目 的とする。 発明の開示  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
請求項 1 に係る発明の溶湯定量供給装置は、 底部側に給湯口 2及び排 湯口 3 を有し、 溶湯保持炉 5 内に所定高さ位置に配置される密閉状のポ ッ ト 1 と、 排湯口 3 に連設されていて铸造機 Mに接続可能な出湯管 7 と 、 開閉駆動手段によ り ポ ッ ト 1 内を上下動して給湯口 2 を開閉する開閉 弁 8 と、 ポ ッ ト 1 内の溶湯 6 の上限レベル L 1 及び下限レベル L 2 を検 出する レベル検出手段 1 0 と、 ポ ッ 卜 1 内に窒素ガスや乾燥空気等の金 属溶湯に反応し難い気体 (以下 「不活性ガス」 と いう) を供給してポ ッ ト 1 内部を加圧し、 この供袷した不活性ガスを大気に放出 してポ ッ ト 1 内部を減圧する加圧減圧手段 2 0 とを具備し、 給湯口 2 からポ ッ ト 1 内 に流入した溶湯 6 をその上限レベル L 1 から下限レベル L 2 まで加圧す る こ とによ ってポ ッ ト 1 内の溶湯 6 を排湯口 3 から出湯管 7 を通 じて出 湯するよ う に してなる ものである。 The molten metal fixed-quantity supply device of the invention according to claim 1 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 molten metal 6 flowing into the pot 1 from the hot water supply port 2 is maintained at the upper limit level. By applying pressure from L 1 to the lower limit level L 2, the molten metal 6 in the pot 1 is discharged from the drain port 3 through the tapping pipe 7. It is made in the Let 's that.
請求項 1 に係る発明の溶湯定量供給装置によれば、 底部側に給湯口及 び排湯口を有するポ ッ トを溶湯保持炉内に所定高さ位置に配置して、 そ の給湯口からポ ッ ト内に流入した溶湯をその上限レベルから下限レベル まで不活性ガスによ り加圧する こ と によって、 ポ ッ ト内の溶湯を排湯口 から出湯管を通じて出湯するよ う に したものであるから、 溶湯保持炉内 の溶湯を铸造機へ自動的に確実に定量供給する こ とができ、 また不活性 ガスの使用による加圧減圧手段によ って溶湯を給排するため、 溶湯がァ ルミ 合金等の非鉄金属である場合にその溶湯中に磁性金属成分が混入し ていても、 その磁性金属成分が装置内部に吸着して詰ま る こ とがな く 、 故障が少ない上に、 比較的安価に製作できてコス トを安く でき る。  According to the molten metal quantitative supply device of the invention according to claim 1, 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. In addition, 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. In the case of a non-ferrous metal such as an alloy, even if a magnetic metal component is mixed in the molten metal, 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.
請求項 2 に係る発明の溶湯定量供給装置は、 底部側に給湯口 2 及び排 湯口 3 を有し、 溶湯保持炉 5 内に所定高さ位置に配置される密閉状のポ ッ ト 1 と、 排湯口 3 に連設されていて铸造機 Mに接続可能な出湯管 7 と 、 それぞれ開閉駆動手段により ポ ッ ト 1 内を上下動して給湯口 2 及び排 湯口 3 をそれぞれ開閉する開閉弁 8 , 3 8 と、 ポ ッ ト 1 内の溶湯 6 の上 限レベル L 1 及び下限レベル L 2を検出する レベル検出手段 1 0 と、 ポ ッ ト 1 内に不活性ガスを供給してポッ ト 1 内部を加圧し、 またポッ ト 1 内の不活性ガスを大気に放出してポッ ト 1 内部を減圧する加圧減圧手段 4 0 とを具備し、 給湯口 2からポッ ト 1 内に流入した溶湯 6をその上限 レベル L 1 から下限レベル L 2 まで加圧することによってポッ ト 1 内の 溶湯 6を排湯口 3から出湯管を通じて出湯するようにしてなるものであ る。 The molten metal fixed-quantity supply device of the invention according to claim 2 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. , 3 8 and above molten metal 6 in pot 1 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. Thus, the molten metal 6 in the pot 1 is discharged from the discharge port 3 through a tapping pipe.
請求項 2 によれば、 給湯口を開閉する開閉弁と排湯口を開閉する開閉 弁とを併設すると共に、 ポッ ト内に加圧供給した不活性ガスを大気圧に 開放放出してポッ ト内部を減圧するようにした加圧減圧手段を備え、 該 加圧減圧手段が加圧側から減圧側に切り換わって溶湯保持炉内の溶湯を ポッ ト内部に流入される際に、 排湯口側の開閉弁が作動して排湯口を閉 鎖した状態で給湯口から溶湯をポッ ト内部に流入されるようになってい るため、 ポッ ト内部への溶湯の流入量を正確に規制することができ、 こ れがためにポッ トからの単位当りの出湯量を繰り返し正確に維持するこ とができる。  According to claim 2, 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.
請求項 3 に係る発明の溶湯定量供給装置は、 底部側に給湯口 2及び排 湯口 3を有し、 溶湯保持炉 5内に所定高さ位置に配置される密閉状のポ ッ ト 1 と、 排湯口 3 に連設されていて铸造機 Mに接続可能な出湯管 7 と 、 それぞれ開閉駆動手段によりポッ ト 1 内を上下動して給湯口 2及び排 湯口 3をそれぞれ開閉する開閉弁 8 , 3 8 と、 ポッ ト 1 内の溶湯 6の上 限レベル L 1 及び下限レベル L 2を検出する レベル検出手段 1 0 と、 ポ ッ ト 1 内に不活性ガスを供給してポッ ト 1 内部を加圧し、 またポッ ト 1 内の不活性ガスを強制吸引 してポッ ト 1 内部を減圧する加圧減圧手段 4 0 とを具備し、 給湯口 2からポッ ト 1 内に流入した溶湯 6 をその上限レ ベル L 1 から下限レベル L 2 まで加圧することによってポッ ト 1 内の溶 湯 6 を排湯口 3 から出湯管を通 じて出湯するよ う に してなる ものである 請求項 3 によれば、 給湯口を開閉する開閉弁と排湯口を開閉する開閉 弁とを併設する と共に、 ポ ッ ト内に加圧供給 した不活性ガスを強制的に 吸引 してポ ッ ト内部を減圧するよ う に した加圧減圧手段を備えているか ら、 請求項 1 による効果に加え、 ポ ッ ト内部の加圧による溶湯の出湯に よって、 溶湯保持炉内に貯められた溶湯の湯面レベルが降下しても、 ポ ッ ト内の上限レベルを常に一定の位置に保つこ とができ、 これがために 溶湯保持炉内に頻繁に溶湯を補給する必要がな く 、 溶湯の供給作業が容 易になる と共に、 よ り正確な定量供給を行う こ とができ る。 The molten metal fixed-quantity supply device of the invention according to claim 3 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; 3 8, 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. By increasing the pressure from the upper level L1 to the lower level L2, According to claim 3, 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. At the same time, 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. Even when the molten metal is discharged by pressurizing the inside of the pot and the level of the molten metal stored in the molten metal holding furnace drops, the upper limit level in the pot can always be kept at a fixed position. As a result, it is not necessary to frequently replenish the molten metal into the molten metal holding furnace, so that the operation of supplying the molten metal becomes easy and more accurate quantitative supply can be performed.
請求項 4 は、 請求項 1 ~ 3 のいずれかに記載の溶湯定量供給装置にお いて、 開閉駆動手段がポッ ト 1 の上端部に立設した流体圧シ リ ンダ 9 , 3 9 からな り、 この流体圧シ リ ンダ 9 , 3 9 の ピス ト ンロ ッ ド 9 a , 3 9 a に棒状の開閉弁 8 , 3 8 を連結してなる ものである。  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. In addition, 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.
請求項 4 によれば、 開閉弁の駆動手段と して、 ポ ッ ト上端部に立設し た流体圧シ リ ンダを用い、 このシ リ ンダに棒状の開閉弁を連結 している ため、 開閉駆動手段の構成の簡素化と コ ンパク ト化を図る こ とができ る 請求項 5 は、 請求項 1〜 3 のいずれかに記載の溶湯定量供給装置にお いて、 ポ ッ ト 1 、 開閉弁 8 , 3 8 及び出湯管 7 をそれぞれセラ ミ ッ ク に よって形成した ものである。  According to the fourth aspect, 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.
請求項 5 によれば、 ポ ッ ト、 開閉弁及び出湯管をそれぞれセラ ミ ッ ク によ り形成する こ とによって、 耐熱性に優れたポ ッ ト、 開閉弁及び出湯 管を安価に得る こ とができ る。  According to the fifth aspect, 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.
請求項 6 は、 請求項 1 ~ 3 のいずれかに記載の溶湯定量供給装置にお いて、 ポ ッ ト 1 の給湯口 2 にはその入口側にセラ ミ ッ ク製のフ ィ ルター 2 6を取り付けたものである。 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.
請求項 6 によれば、 ポッ 卜の給湯口の入口側にセラ ミ ッ ク製のフィ ル ターを取り付けることにより、 溶湯保持炉内の溶湯中に混入している酸 化物、 塵、 その他の不純物を除去できて、 铸造機に良質の溶湯を供給す ることができる。 図面の簡単な説明  According to the sixth aspect, by attaching a ceramic filter to the inlet side of the hot water supply port of the pot, oxides, dust, and other impurities mixed in the molten metal in the molten metal holding furnace can be obtained. And high quality molten metal can be supplied to the machine. BRIEF DESCRIPTION OF THE FIGURES
図 1 は、 本発明の第 1 実施形態による溶湯定量供給装置を示す縦断 側面図 である。  FIG. 1 is a vertical sectional side view showing a molten metal quantitative supply device according to a first embodiment of the present invention.
図 2 は、 図 1 に示す溶湯定量供給装置の平面図である。  FIG. 2 is a plan view of the molten metal feeder shown in FIG.
図 3 は 図 1 に示す溶湯定量供給装置の一部拡大断面図である。 図 4 は 本発明の第 2実施形態による溶湯供給装置を示す縦断側面 図であ る  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.
図 5 は 図 4 に示す溶湯定量供給装置の一部拡大断面図である。 図 6 は 本発明の第 3実施形態による溶湯供給装置を示す縦断側面 図であ る。  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.
図 7 は、 レベル検出手段の一実施形態を示す拡大縦断面図である。 発明を実施するための最良の形態  FIG. 7 is an enlarged vertical sectional view showing one embodiment of the level detecting means. BEST MODE FOR CARRYING OUT THE INVENTION
図 1 は本発明の第 1実施形態による溶湯定量供給装置を示し、 図 2 は その平面図、 また図 3は一部拡大断面図である。 この第 1実施形態は、 主と してアルミ合金からなる溶湯を铸造機に供袷する場合の具体例を示 すものである。 これらの図において、 1 は底部側に給湯口 2及び排湯口 3を備えた有底円筒状のポッ トで、 セラ ミ ックによって形成され、 この ポッ ト 1 は、 上端部 1 aが所要の耐熱性材料からなる支持体 4 に密封状 態で貫通支持されて当該支持体 4 の下面から下方へ垂下され、 開放型溶 湯保持炉 5 内に所定高さ位置に挿入配置される。 溶湯保持炉 5 内には、 金属溶解炉で溶解された例えばアル ミ 合金の溶湯 6 がほぼ満杯に貯めら れ、 しかしてポ ッ ト 1 は図 1 に示すよ う に溶湯 6 中に浸漬された状態と なる。 FIG. 1 shows a molten metal constant feeder according to a first embodiment of the present invention, FIG. 2 is a plan view thereof, and 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. In these figures, 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. It is penetrated and supported by 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. In the molten metal holding furnace 5, for example, 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.
7 は、 ポ ッ ト 1 の排湯口 3 に連設されていて铸造機 (例えばダイキヤ ス トマシ ン) Mの注湯口 (図示せず) に接続可能な出湯管で、 ポ ッ ト 1 と同じ く セラ ミ ッ ク によ り形成されていて、 排湯口 3 の外端部からポ ッ 卜 1 の外側面に沿って上方に延びる垂直管部 7 a と、 この垂直管部 7 a の上端に連設されて支持体 4 に貫通支持されるベン ド部 7 b と、 このべ ン ド部 7 b に連結されて铸造機 M側へ水平に延びる水平管部 7 c とから なり、 水平管部 7 c の先端部 7 dが铸造機 Mの注湯口に圧接されるよ う になっている。 また、 図示は省略するが、 出湯管 7 にはヒータ一が取り 付けてあって、 ポ ッ ト 1 からの溶湯 6 を適温にて出湯でき るよ う になつ ている。  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. And 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. Although not shown, 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.
8 は、 開閉駆動手段と しての流体圧シ リ ンダ 9 によ り ポ ッ ト 1 内を所 定ス ト ローク上下動してポ ッ ト 1 の給湯口 2 を開閉する開閉弁で、 図 3 に示すよ う に下端部に断面円弧状の弁体 8 a を形成したセラ ミ ッ ク製の 中空状弁棒 8 b を有する。 流体圧シ リ ンダ 9 は、 支持体 4 に立設されて いて、 そのピス ト ンロ ッ ド 9 a が、 支持体 4 を密封状態で摺動可能に貫 通する と共に支持体 4 内で弁棒 8 b と連結 している。 しかして、 シ リ ン ダ 9 の伸長作動による弁棒 8 bの下動によ り、 弁体 8 a が袷湯口 2 に密 接係合して、 給湯口 2が閉鎖され、 またシ リ ンダ 9 の収縮作動による弁 棒 8 bの上動によ り弁体 8 aが給湯口 2 から離脱して、 給湯口 2 が開口 される こ とになる。  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. As shown in Fig. 3, 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. However, the lowering of the 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. When 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.
1 0 は、 ポ ッ ト 1 内の溶湯 6 の上限レベル L 1 及び下限レベル L 2 を 検出する レベル検出手段である。 尚、 ポ ッ ト 1 内の溶湯 6 の上限レベル 了 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. The upper limit level of molten metal 6 in pot 1 End
L 1 は、 铸造機へ出湯を開始する際の溶湯表面の水準であり、 溶湯保持 炉 5 に貯められる溶湯 6 (ポッ ト 1外部の溶湯 6 ) の湯面レベル L o と 同じになる場合が多い。 また下限レベル L 2 は铸造機への出湯が完了し た時点のポッ ト 1 内の溶湯表面の水準である。 このレベル検出手段 1 0 の一実施形態を図 7を参照して説明すると、 ポッ 卜 1 の真上に位置する 支持体 4 の上面中央に台板 1 1 を介してフラ ンジ体 1 2を取り付け、 こ のフラ ンジ体 1 2 と台板 1 1 と支持体 4 とを上下に貫通して固定したガ イ ドス リ ーブ 1 3 に、 フロー ト軸 1 4 を摺動可能に揷通すると共に、 ポ ッ ト 1 内に位置するフロー ト軸 1 4の下端にフロー ト 1 5を、 また上端 に被検知体 1 6をそれぞれ取り付ける。 またフラ ンジ 1 2上には上端部 が閉鎖された透明の筒状カバー 1 7を、 前記フロー ト軸 1 4及び被検知 体 1 6を被包するように配設し、 また筒状カバー 1 7 の外側に、 それぞ れ投光器 1 8 a , 1 9 a と受光器 1 8 b, 1 9 b とからなる上下 2つの 光電スィ ッチ 1 8 , 1 9を、 前記被検知体 1 6の検知手段と してそれぞ れ高さ位置調整可能に設置し、 しかして上部光電スィ ッ チ 1 8が被検知 体 1 6を介して上限レベル L 1 を検出し、 下部光電スィ ッチ 1 9が被検 知体 1 6を介して下限レベル L 2 を検出する。  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. One embodiment of the level detecting means 10 will be described with reference to FIG. 7. 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. 7, 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.
上記台板 1 1 、 フラ ンジ体 1 2 、 ガイ ドス リ ーブ 1 3 、 フ ロー ト軸 1 4 、 フロー ト 1 5、 被検知体 1 6及び筒状カバ一 1 7 は、 それぞれセラ ミ ッ クによって形成される。 被検知体 1 6の検知手段と しては光電スィ ツチ 1 8 , 1 9 に限らず、 近接スィ ッチ等を適用するこ とができ る。 尚 、 上述したレベル検出手段 1 0 は、 フロー ト式検出手段を採用したが、 これ以外に、 レーザーによってポッ ト 1 内の溶湯 6の湯面を直接計測す るようにしたもの、 あるいは静電容量可変型のものを採用してもよい。 また図 1 において 2 0 は、 ポッ ト 1 内に不活性ガス (窒素ガスや乾燥 空気等の金属溶湯に反応し難い気体) を供給してポッ ト 1 の内部を加圧 し、 この供給した不活性ガスを大気に放出 してポ ッ ト 1 の内部を減圧す るための加圧減圧手段である。 この加圧減圧手段 2 0 は、 前記台板 1 1 から支持体 4 を貫通してポ ッ ト 1 内部に通じるよ う に設けたガス給排孔 2 1 (図 1 及び図 2 参照) に、 例えば不活性ガスを収容したタ ンク とそ のガスを圧送するポ ンプとからなる加圧源 2 2 を、 ガスライ ン 2 3 によ つて接続する と共に、 このライ ン 2 3 に圧力調整弁 2 4 及び電磁切換弁 2 5 を設けた もので、 電磁切換弁 2 5 は、 図示は省略するが、 流体圧シ リ ンダ 9 の制御部及びレベル検出手段 1 0 の光電スィ ッ チ 1 8 , 1 9 に それぞれ電気的に接続されている。 なお、 圧力調整弁 2 4 と して電気制 御可能な圧力制御弁を用いてポ ッ 卜 1 内の圧力を任意に変化させるよ う に してもよい。 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. Formed by 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. Incidentally, the above-mentioned level detecting means 10 employs a float type detecting means. In addition to this, 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. In FIG. 1, 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. For example, 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. And an electromagnetic switching valve 25. Although not shown, the 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.
しかして、 不活性ガスをポ ッ ト 1 内に供給して加圧する と き は、 加圧 源 2 2 からガス給排孔 2 1 に向かう流路を開放するよ う に切換弁 2 5 を 作動させればよ く 、 またポ ッ ト 1 の内部を減圧する と きは、 加圧源 2 2 からの流路を遮断し且つガス袷排孔 2 1 を大気開放流路に通じるよ う に 切換弁を作動させればよい。 ポ ッ ト 1 内の加圧力の調整は圧力調整弁 2 4 によって行う こ とができ る。 尚、 加圧源 2 2 と しては、 不活性ガスを 加圧充塡した高圧ボンベのよ う な ものでもよい。  Therefore, when the inert gas is supplied into the port 1 and pressurized, 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. When 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.
前記ポ ッ ト 1 の給湯口 2 にはその入口側に、 溶湯保持炉 5 内の溶湯 6 中に混入している酸化物、 塵その他の不純物を除去するためのセラ ミ ッ ク製のフ ィ ルター 2 6 が取り付け られている。 このフ ィ ルタ一 2 6 は、 図 3 に示すよ う に、 セラ ミ ッ ク によ って各壁部が多孔状を呈する箱形、 半球状、 その他の所望の形状に形成された もので、 その多孔状態は約 1 0〜 6 0 メ ッ シュ と される。 このフ ィ ルタ一 2 6 の取り付けにあたって は、 ポ ッ ト 1 の下面部に係止部 2 7 を設けて、 これにフ ィ ルタ一 2 6 上 端部の鍔部 2 6 a を係止させる と よい。 尚、 このフ ィ ルター 2 6 は、 必 要に応じて取り付けるようにすればよい。 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. When installing the filter 26, 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.
前記出湯管 7 は、 流体圧シリ ンダ式の水平移動手段 2 8 によってポッ ト 1 と一体に水平移動できるようになつている。 即ち、 この水平移動手 段 2 8 は、 図 1 及び図 2 に示すように、 溶湯保持炉 5 に隣接して設けた 基枠 2 9の上端部から支持枠 3 0を溶湯保持炉 5の上方に亘つて水平に 延設し、 この支持枠 3 0 の長手方向両側に形成したガイ ドレール 3 0 a , 3 0 aに、 前記支持体 4 にそれぞれブラケッ 卜 3 1 を介して取り付け た複数の車輪 3 2を転動可能に係合させると共に、 前記支持体 4を、 基 枠 2 9上に設置した流体圧シリ ンダ 3 3のピス ト ンロッ ド 3 3 aに連結 杆 3 3 bを介して連動連結したもので、 シ リ ンダ 3 3 の伸縮作動によつ て、 支持体 4 とこれに一体に装備されたポッ ト 1及び出湯管 7を支持枠 3 0の長手方向に水平移動させることができる。 従って、 流体圧シリ ン ダ 3 3を適宜に伸縮作動させるこ とによ り、 出湯管 7 の先端部 7 dを铸 造機 Mの注湯口 (図示せず) に押し付けて確実に当接係合させることが できる。  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.
次に、 上記のように構成される溶湯定量供給装置の作用について説明 する。  Next, the operation of the molten metal fixed-quantity supply device configured as described above will be described.
先ず、 ポッ ト 1 内部が大気に開放され、 図 1及び図 3のように開閉弁 8が上動 (開弁) して給湯□ 2が開口した状態から、 溶湯保持炉 5内の 溶湯 6が給湯口 2 よりポッ ト 1 内に流入し、 その溶湯 6がポッ ト 1 内の 上限レベル L 1 まで上昇すると、 これをレベル検出手段 1 0が検出する 。 即ち、 ポッ 卜 1 内の湯面の上昇に伴ってフロー ト 1 5が上昇し、 フロ ー ト軸 1 4 を介して被検知体 1 6が上限レベル L 1 に対応する位置まで 上動すると、 この被検知体 1 6 を光電スィ ッチ 1 8が検知する。 この検 知信号によ って、 流体圧シリ ンダ 9が伸長作動し、 開閉弁 8 を下動して 給湯口 2 を閉じると同時に、 加圧減圧手段 2 0の加圧側が作動して、 ガ 1 O First, 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. When the molten metal 6 flows into the pot 1 from the hot water supply port 2 and rises to the upper limit level L 1 in the pot 1, this is detected by the level detecting means 10. That is, when 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. In response to this detection signal, 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
ス給排孔 2 1 よりポッ ト 1 内の上部に不活性ガスが供給される。 このガ スの供給によってポッ ト 1 内の溶湯 6が加圧され、 この溶湯 6 は排湯口 3から出湯管 7へ排出されてゆく。 しかして、 ポッ ト 1 内の溶湯 6が下 限レベル L 2 まで下降すると、 それと対応する位置に下降した被検知体 1 6を光電スィ ッチ 1 9が検知する。 この検知信号によ って、 電磁切換 弁 2 5が作動して加圧減圧手段 2 0 は減圧側に作動し、 ポッ 卜 1 内に供 給されていた不活性ガスが電磁切換弁 2 5の開放通路を通って大気に放 出され、 同時に流体圧シリ ンダ 9が収縮作動して、 開閉弁 8を上動して 給湯口 2を開口させ、 それにより溶湯保持炉 5内の溶湯 6がポッ ト 1 内 に流入し、 以降は上記の動作が繰り返される。 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. Thus, when the molten metal 6 in the pot 1 drops to the lower limit level L2, the photoelectric switch 19 detects the object 16 that has dropped to the corresponding position. In response to this detection signal, 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.
上記のように、 ポッ 卜 1 内に供給された不活性ガスによって内部の溶 湯 6が上限レベル L 1 から下限レベル L 2 まで加圧下降することによつ て、 ポッ ト 1 内の溶湯 6 は、 両レベル L 1 , L 2間の間隔長さとポッ ト 1 内部の断面積との積に相当する一定量が出湯管 7から出湯されること になる。 従って、 上記両レベル L 1 , L 2間の間隔長さを一定に保持す れば、 上記一連の動作を複数回繰り返すこ とによって、 その複数回に相 当する量の溶湯 6 を定量供給するこ とができ る。 溶湯 6 の出湯量は、 レ ベル検出手段 1 0 の下部側光電スィ ッチ 1 9 (検知手段) の位置を上下 方向に変更させることによって、 自由に変更可能である。  As described above, 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. As a result, 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.
尚、 この溶湯定量供給装置の使用においては、 ポッ ト 1 内の溶湯 6が 出湯管 7を通じて出湯される分、 溶湯保持炉 5内の溶湯 6が減少し、 そ の減少に伴って溶湯保持炉 5内の溶湯 6の湯面レベル L oが少しずつ下 がることになる。 従って、 上限レベル L 1 と下限レベル L 2 との間の間 隔長さを一定に保つには、 溶湯保持炉 5の内容積をできるだけ大き くす ると共に、 溶湯保持炉 5内の湯面が下がらないようにその湯面レベル L oを逐次検知しながら溶湯保持炉 5内に溶湯 6を補給してやる必要があ る。 In addition, in the use of the molten metal constant supply device, 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.
図 4及び図 5 は、 本発明の第 2実施形態による溶湯定量供給装置を示 したもので、 この装置が前記第 1 実施形態と異なる構成は、 給湯口 2を 開閉する開閉弁 8の他に、 ポッ ト 1 の排湯口 3を開閉するように流体圧 シ リ ンダ 3 9 (開閉駆動手段) によって上下作動する開閉弁 3 8を備え た点である。 それ以外の構成については、 前記第 1実施形態と同一であ るため、 同一構成部材については同一符号を付して説明を省略する。 即ち、 排湯口 3用の開閉弁 3 8 は、 給湯口 2用の開閉弁 8 とほとんど 同じで、 図 5 に示すように下端部に断面円弧状の弁体 3 8 aを形成した 弁棒 3 8 bを有し、 流体圧シリ ンダ 3 9 は、 支持体 4 に袷湯口用開閉弁 8の流体圧シリ ンダ 9 と並行して立設され、 そのピス ト ンロッ ド 3 9 a が、 支持体 4 を密封状態で摺動可能に貫通すると共に支持体 4内で弁棒 3 8 b と連結している。 しかして、 このシ リ ンダ 3 9の伸長作動による 弁棒 3 8 bの下動により、 弁体 3 8 aが排湯口 3 に密接係合して該排湯 口 3 を閉鎖し、 またシリ ンダ 3 9の収縮作動による弁棒 3 8 bの上動に より弁体 3 8 aが排湯口 3から離脱して、 該排湯口 3を開口させるよう になっている。 この開閉弁 3 8 もセラ ミ ッ クで形成される。  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. Another feature is that 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. When 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. When 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.
なお、 加圧減圧手段 2 0 は、 図 1 に示す第 1実施形態と同じように、 例えば不活性ガスを収容したタ ンク とそのガスを圧送するポンプとから なる加圧源 2 2を、 ガスライ ン 2 3 によって接続すると共に、 このライ ン 2 3 に圧力調整弁 2 4及び電磁切換弁 2 5 を設けたもので、 電磁切換 弁 2 5 は、 流体圧シリ ンダ 9 の制御部及びレベル検出手段 1 0 の光電ス イ ッチ 1 8 , 1 9 にそれぞれ電気的に接続されている。 そして、 不活性 ガスをポッ ト 1 内に供給して加圧するときは、 加圧源 2 2からガス袷排 孔 2 1 に向かう流路を開放するように切換弁 2 5を作動させればよく 、 またポッ ト 1 の内部を減圧するときは、 加圧源 2 2からの流路を遮断し 且つガス給排孔 2 1 を大気開放流路に通じるように切換弁を作動させれ ばよい。 ポッ ト 1 内の加圧力の調整は圧力調整弁 2 4 によって行う こと ができる。 なお、 圧力調整弁 2 4 と して電気制御可能な圧力制御弁を用 いてポッ ト 1 内の圧力を任意に変化させるようにしてもよいことは前記 第 1実施形態と同じである。 なおまた、 加圧源 2 2 と しては、 不活性ガ スを加圧充塡した高圧ボンベのようなものでもよい。 以上の作動は前記 第 1実施形態と同じである。 As in the first embodiment shown in FIG. 1, 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. When supplying an inert gas into the port 1 and pressurizing the same, 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. When depressurizing the inside of Pot 1, shut off the flow path from pressurizing source 22. In addition, 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. Note that, as in the first embodiment, 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.
上記のように構成される溶湯定量供給装置の使用においては、 図 4及 び図 5 に示すように給湯口用開閉弁 8が上動して給湯口 2が開口し且つ 排湯口用開閉弁 3 8が下動して排湯口 3が閉じた伏態から、 加圧減圧手 段 2 0の減庄側を作動させてポッ ト 1 内部を大気圧に開放することによ つて、 溶湯保持炉 5内の溶湯 6が給湯口 2 よりポッ ト 1 内に流入し、 そ の溶湯 6がポッ ト 1 内の上限レベル L 1 まで上昇すると、 これをレベル 検出手段 1 0が検出する。 即ち、 溶湯 6 の上昇に伴ってフロー ト 1 5が 上昇し、 フロー ト軸 1 4を介して被検知体 1 6が上限レベル L 1 に対応 する位置まで上動すると、 この被検知体 1 6を光電スィ ッチ 1 8が検知 する。  In the use of the molten metal metering device configured as described above, as shown in FIGS. 4 and 5, 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. When the molten metal 6 flows into the pot 1 from the hot water supply port 2 and rises to the upper limit level L 1 in the pot 1, 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.
この検知信号によって、 流体圧シリ ンダ 9が伸長作動して開閉弁 8を 下動し、 給湯口 2を閉じると同時に、 流体圧シリ ンダ 3 9が収縮作動し て開閉弁 3 8を上動し排湯口 3 を開口し、 同時にまた加圧減圧手段 2 0 の作動が加圧側に切り換わって、 ガス給排孔 2 1 よりポッ ト 1 内の上部 に不活性ガスが供給される。 これにより、 ポッ ト 1 内の溶湯 6が加圧さ れて、 排湯口 3から出湯管 7へ排出されてゆき、 しかしてポッ ト 1 内の 溶湯 6の湯面が所定の下限レベル L 2 まで下降すると、 それと対応する 位置に下降した被検知体 1 6を光電スィ ッ チ 1 9が検知する。 この検知 信号により、 流体圧シリ ンダ 9が収縮作動して開閉弁 8を上動し給湯口 2を開口させると同時に、 流体圧シリ ンダ 3 9が伸長作動して開閉弁 3 8を下動し排湯口 3を閉じ、 同時にまた加圧減圧手段 2 0の減圧側が作 動して、 ポッ ト 1 内に供給されていた不活性ガスが、 ガス給排孔 2 1 か ら切換弁 2 5を介し大気に放出され、 それによつて溶湯保持炉 5内の溶 湯 6がポッ ト 1 内に流入する。 以降は上記の動作が繰り返される。 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 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. As a result, 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. When it descends, the photoelectric switch 19 detects the object 16 descending to the corresponding position. In response to this detection signal, the fluid pressure cylinder 9 contracts to move the on-off valve 8 upward, and the hot water inlet At the same time as opening 2, the fluid pressure cylinder 39 expands and moves the on-off valve 38 down to close the drain port 3, and at the same time, 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.
上述した溶湯定量供給装置によると、 ポッ ト 1 内に供給された不活性 ガスによって溶湯 6が上限レベル L 1 から下限レベル L 2 まで加圧下降 することによって、 ポッ ト 1 内部の溶湯 6 は、 両レベル L 1 , L 2間の 間隔長さとポッ ト 1 内部の断面積との積に相当する一定量が出湯管 7か ら出湯されることになり、 従って上記一連の動作を複数回繰り返すこと によって、 その複数回に相当する量の溶湯 6を定量供給するこ とができ る。 溶湯 6の出湯量は、 レベル検出手段 1 0の上下光電スィ ッチ 1 8, 1 9 (検知手段) の位置を上下方向に変更させるこ とによって、 自由に 変更するこ とができ る。 この場合、 上下光電スィ ッチ 1 8 , 1 9の内、 いずれの位置を変更してもよい。  According to the above-described molten metal constant supply apparatus, 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. Thus, 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.
この装置では、 ポッ ト 1 内の溶湯が下限レベル L 2 まで排出されたと きに、 検知信号により加圧減圧手段 2 0の切換弁 2 5が切り換わって減 圧側に作動して溶湯保持炉 5内の溶湯 6がポッ ト 1 内に流入される際に 、 排湯口 3側の開閉弁 3 8が作動して排湯口 3を閉鎖した状態で給湯口 2から溶湯 6をポッ ト 1 内に流入されるようにしたため、 ポッ ト 1 内へ の溶湯 6の流入量を正確に規制することができ、 例えばポッ ト 1 内に流 入した溶湯 6の一部が排湯口 3から外部に排出されるというようなこと がない。  In this device, when the molten metal in the pot 1 is discharged to the lower limit level L 2, 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. When the molten metal 6 in the inside flows into the pot 1, 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. As a result, 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.
図 6 は、 本発明の第 3実施形態による溶湯定量供給装置を示したもの で、 この装置が前記第 2実施形態と異なる構成は、 ポッ ト 1 内に供給し た不活性ガスを強制的に外部に吸引してポッ ト 1 内部を減圧するように した加圧減圧手段 4 0を備えた点である。 それ以外の構成については、 前記第 2実施形態と同一であるため、 同一構成部材については同一符号 を付して説明を省略する。 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.
即ち、 加圧減圧手段 4 0 は、 図 6 に例示するように、 ポッ 卜 1 の内部 に通じるガス給排孔 2 1 に、 不活性ガスを貯蔵した不活性ガスタンク 3 4 と、 このタ ンク 3 4内の不活性ガスを圧送する不活性ガス圧送ポンプ 3 5 とを、 ガスライ ン 3 6 によ って接続する と共に、 このライ ン 3 6 に 圧力調整弁 3 7及び電磁切換弁 4 1 を設け、 更に電磁切換弁 4 1 と前記 不活性ガスタ ンク 3 4 とをバイパスライ ン 4 2 によって接続し、 このバ ィパスライ ン 4 2 には、 吸引ポンプ 4 3及び圧力調整弁 4 4を介在させ ている。 電磁切換弁 4 1 は、 図示は省略するが、 流体圧シリ ンダ 9 , 3 9の制御部及びレベル検出手段 1 0の光電スィ ッチ 1 8 , 1 9 にそれぞ れ電気的に接続されている。  That is, as shown in FIG. 6, 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. Further, 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. . Although not shown, 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.
しかして、 不活性ガスをポッ ト 1 内に供給して加圧するときは、 バイ パスライ ン 4 2を遮断すると共に不活性ガス圧送ポンプ 3 5からガス給 排孔 2 1 に向かう流路を開放するように切換弁 4 1 を作動させればよく 、 またポッ ト 1 の内部を減圧するときは、 圧送ポンプ 3 5からガス給排 孔 2 1 に向かう流路を遮断し且つバイパスライ ン 4 2を開放するように 切換弁 4 1 を作動させればよい。 ポッ ト 1 内の加圧調整及び減圧調整は 、 圧力調整弁 3 7、 4 4 によ り行う こ とができる。  When the inert gas is supplied into the port 1 and pressurized, 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. When 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.
上記のように構成される溶湯定量供給装置の使用においては、 給湯口 用開閉弁 8が上動して給湯口 2が開口し且つ排湯口用開閉弁 3 8が下動 して排湯口 3が閉じた状態から、 加圧減圧手段 4 0 の減圧側を作動させ てポッ ト 1 内部を外部に向かって吸引することによって、 溶湯保持炉 5 内の溶湯 6が給湯口 2 よりポッ ト 1 内に流入し、 その溶湯 6がポッ ト 1 内の上限レベル L 1 まで上昇する と、 これをレベル検出手段 1 0が検出 する。 即ち、 溶湯 6 の上昇に伴ってフ ロー ト 1 5が上昇し、 フロー ト軸 1 4を介して被検知体 1 6が上限レベル L 1 に対応する位置まで上動す ると、 この被検知体 1 6を光電スィ ッチ 1 8が検知する。 In the use of the molten metal constant-quantity supply device configured as described above, 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. From the closed state, 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. When the molten metal 6 flows in and rises to the upper limit level L1 in the pot 1, this is detected by 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.
この検知信号によって、 流体圧シリ ンダ 9が伸長作動して開閉弁 8を 下動し、 給湯口 2を閉じると同時に、 流体圧シリ ンダ 3 9が収縮作動し て開閉弁 3 8を上動し排湯口 3 を開口し、 同時にまた加圧減圧手段 4 0 の作動が加圧側に切り換わって、 ガス給排孔 2 1 よりポッ ト 1 内の上部 に不活性ガスが供給される。 これにより、 ポッ ト 1 内の溶湯 6が加圧さ れて、 排湯口 3から出湯管 7へ排出されてゆき、 しかしてポッ ト 1 内の 溶湯 6の湯面が所定の下限レベル L 2 まで下降すると、 それと対応する 位置に下降した被検知体 1 6を光電スィ ッチ 1 9が検知する。 この検知 信号により、 流体圧シリ ンダ 9が収縮作動して開閉弁 8を上動し給湯口 2 を開口させると同時に、 流体圧シリ ンダ 3 9が伸長作動して開閉弁 3 8 を下動し排湯口 3を閉じ、 同時にまた加圧減圧手段 4 0 の減圧側が作 動して、 ポッ ト 1 内に供給されていた不活性ガスが、 ガス給排孔 2 1 か ら切換弁 4 1 を介しバイパスライ ン 4 2 を通って不活性ガスタ ンク 3 4 に戻されるようになり、 それによつて溶湯保持炉 5内の溶湯 6がポッ ト 1 内に流入する。 以降は上記の動作が繰り返される。  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. As a result, 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. When descending, the photoelectric switch 19 detects the object 16 descending to the corresponding position. In response to this detection signal, 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.
上述した溶湯定量供給装置による と、 ポッ ト 1 内に供給された不活性 ガスによって溶湯 6が上限レベル L 1 から下限レベル L 2 まで加圧下降 することによって、 ポッ ト 1 内部の溶湯 6 は、 両レベル L 1 , L 2間の 間隔長さとポッ ト 1 内部の断面積との積に相当する一定量が出湯管 7か ら出湯されることになり、 従って上記一連の動作を複数回繰り返すこと によって、 その複数回に相当する量の溶湯 6 を定量供袷することができ る。 溶湯 6 の出湯量は、 レベル検出手段 1 0 の上下光電スィ ッチ 1 8 , 1 9 (検知手段) の位置を上下方向に変更させるこ と によ って、 自由に 変更することができる点は前記第 1 及び第 2 の実施形態と同じである。 この場合、 上下光電スィ ッチ 1 8 , 1 9の内、 いずれの位置を変更して もよいこと も前記実施形態と同じである。 According to the above-described molten metal quantitative supply apparatus, 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. Thus, the quantity of the molten metal 6 corresponding to the plural times can be supplied quantitatively. 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.
特にこの装置では、 給湯口 2を開閉する開閉弁 8 と排湯口 3を開閉す る開閉弁 3 8 とを併設すると共に、 ポッ ト 1 内に加圧供給した不活性ガ スを強制的に外部に吸引してポッ ト 1 内部を減圧するようにした加圧減 圧手段 4 0を備えているため、 ポッ ト 1 内部の加圧による溶湯 6の出湯 によって、 溶湯保持炉 5内に貯められた溶湯 6 の湯面レベル L 0が降下 しても、 ポッ ト 1 内の上限レベル L 1 を常に一定の位置に保持すること ができ、 従って溶湯保持炉 5内に頻繁に溶湯 6 を補給する必要がなく 、 溶湯 6の供給作業が容易になる上、 より一層正確な定量供給を行う こと ができる。  Particularly, in this device, 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. Is provided with a pressure reducing means 40 for reducing the pressure inside the pot 1 by suction to the inside of the pot 1. Even if the surface level L 0 of the molten metal 6 drops, the upper limit level L 1 in the pot 1 can always be kept at a fixed position, and therefore the molten metal 6 must be replenished frequently in the molten metal holding furnace 5. As a result, the supply operation of the molten metal 6 becomes easy, and more accurate quantitative supply can be performed.
なお、 前記実施形態は主と してアルミ合金の溶湯を供給する場合の具 体例について述べたが、 この実施形態に限定されることはなく 、 例えば マグネシウム溶湯などの各種金属の溶湯供給装置と して用いることがで きることは言うまでもない。 マグネシウム溶湯の場合には、 ポッ ト、 開 閉弁あるいは出湯管は鉄製のものを使用することができる。  Although the embodiment has mainly described the specific example in the case of supplying the molten metal of the aluminum alloy, the present invention is not limited to this embodiment. For example, the apparatus is a device for supplying a molten metal such as a magnesium molten metal. Needless to say, it can be used. In the case of molten magnesium, the pot, opening / closing valve or tapping pipe can be made of iron.
産業上の利用の可能性 Industrial applicability
以上の説明から明らかなように本発明によれば、 溶湯保持炉内の溶湯 を铸造機へ自動的に確実に定量供給するこ とができ、 また不活性ガスの 使用による加圧減圧手段によって溶湯を給排するため、 溶湯がアルミ合 金等の非鉄金属である場合にその溶湯中に磁性金属成分が混入していて も、 磁気ポンプを使用する場合のようにその磁性金属成分が装置内部に 吸着して詰まることがなく 、 故障が少ない上に、 比較的安価に製作でき てコス トを安く できる。 また、 不活性ガスの使用により金属湯面に酸化 1 τ As is clear from the above description, according to the present invention, 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. When the molten metal is a non-ferrous metal such as aluminum alloy, even if the molten metal contains a magnetic metal component, 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. In addition, the use of inert gas oxidizes the metal surface. 1 τ
物が発生しない。 さ らに、 溶湯温度を降下させずに出湯できるので、 溶 解炉ゃ保持炉の温度を低下させることができ、 省エネルギーに役立つと と もに、 品質の良い铸造を可能とするものである。 Nothing is generated. Furthermore, since 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.

Claims

請 求 の 範 囲 The scope of the claims
1 底部側に給湯口及び排湯口を有し、 溶湯保持炉内に所定高さ位置 に配置される密閉状のポッ 卜と、 排湯口に連設されていて铸造機に接続 可能な出湯管と、 開閉駆動手段によりポッ ト内を上下動して給湯口を開 閉する開閉弁と、 ポッ ト内の溶湯の上限レベル及び下限レベルを検出す る レベル検出手段と、 ポッ ト内に窒素ガスや乾燥空気等の金属溶湯に反 応し難い気体 (以下 「不活性ガス」 という) を供給してポッ ト内部を加 圧し、 またポッ ト内の不活性ガスを大気に放出してポッ ト内部を減圧す る加圧減圧手段とを具備し、 袷湯口からポッ ト内に流入した溶湯をその 上限レベルから下限レベルまで加圧するこ とによ ってポッ ト内の溶湯を 排湯口から出湯管を通じて出湯するようにしてなる溶湯定量供給装置。  (1) A closed port that has a hot water supply port and a discharge port on the bottom side and is placed at a predetermined height in the molten metal holding furnace, and a tapping pipe that is connected to the drainage port and that can be connected to the machine. An opening / closing valve that opens and closes a hot water supply port by moving the inside of the pot up and down by opening and closing drive means, a level detection means for detecting an upper limit level and a lower limit level of molten metal in the pot, and a nitrogen gas or The inside of the pot is pressurized by supplying a gas (hereinafter referred to as “inert gas”) that is difficult to react with the molten metal, such as dry air, and the inside of the pot is released by releasing the inert gas in the pot to the atmosphere. A depressurizing means for depressurizing, and pressurizing the molten metal which has flowed into the pot from the lining gate through the upper limit level to the lower limit level, so that the molten metal in the pot is discharged from the drain port through the tapping pipe. A molten metal metering and feeding device that discharges molten metal.
2 底部側に給湯口及び排湯口を有し、 溶湯保持炉内に所定高さ位置 に配置される密閉状のポッ 卜 と、 排湯口に連設されていて铸造機に接続 可能な出湯管と、 それぞれ開閉駆動手段によりポッ ト内を上下動して給 湯口及び排湯口をそれぞれ開閉する開閉弁と、 ポッ ト内の溶湯の上限レ ベル及び下限レベルを検出する レベル検出手段と、 ポッ ト内に不活性ガ スを供給してポッ ト内部を加圧し、 またポッ ト内の不活性ガスを大気に 放出してポッ ト内部を減圧する加圧減圧手段とを具備し、 給湯口からポ ッ ト内に流入した溶湯をその上限レベルから下限レベルまで加圧するこ とによってポッ ト内の溶湯を排湯口から出湯管を通じて出湯するように してなる溶湯定量供給装置。  (2) A closed port that has a hot water inlet and a hot water outlet on the bottom side and is located at a predetermined height in the molten metal holding furnace, and a hot water pipe that is connected to the hot water outlet and that can be connected to the machine. An opening / closing valve that moves up and down in the pot by opening / closing drive means to open and close a hot water outlet and a hot water outlet respectively; a level detecting means for detecting an upper limit level and a lower limit level of molten metal in the pot; Pressurizing and depressurizing means for supplying inert gas to the inside of the pot to pressurize the inside of the pot, and releasing the inert gas in the pot to the atmosphere to depressurize the inside of the pot. A fixed-quantity molten metal supply device that pressurizes the molten metal that has flowed into the port from its upper limit level to its lower limit level so that the molten metal in the pot flows out of the drain port through a tapping pipe.
3 底部側に給湯口及び排湯口を有し、 溶湯保持炉内に所定高さ位置 に配置される密閉状のポッ 卜と、 排湯口に連設されていて铸造機に接続 可能な出湯管と、 それぞれ開閉駆動手段によりポッ ト内を上下動して給 湯口及び排湯口をそれぞれ開閉する開閉弁と、 ポッ ト内の溶湯の上限レ ベル及び下限レベルを検出するレベル検出手段と、 ポッ ト内に不活性ガ スを供給してポッ ト内部を加圧し、 またポッ ト内の不活性ガスを強制吸 引 してポッ ト内部を減圧する加圧減圧手段とを具備し、 給湯口からポッ ト内に流入した溶湯をその上限レベルから下限レベルまで加圧すること によってポッ ト内の溶湯を排湯口から出湯管を通じて出湯するようにし てなる溶湯定量供給装置。 (3) A closed port that has a hot water inlet and a hot water outlet on the bottom side and is located at a predetermined height in the molten metal holding furnace, and a tapping pipe that is connected to the hot water outlet and can be connected to a machine. An on-off valve for opening and closing the hot water outlet and the hot water outlet by moving the inside of the pot up and down by opening and closing drive means, a level detecting means for detecting an upper limit level and a lower limit level of the molten metal in the pot, Inert gas Pressurizing and depressurizing means for supplying pressure to the inside of the pot by supplying air and forcibly sucking the inert gas in the pot to reduce the inside of the pot. A fixed-quantity molten metal supply device that pressurizes molten metal from its upper limit level to its lower limit level so that the molten metal in the pot is discharged from a drain outlet through a tapping pipe.
4 開閉駆動手段はポッ 卜の上端部に立設した流体圧シ リ ンダからな り、 この流体圧シリ ンダのピス ト ンロッ ドに棒状の開閉弁を連結してな る請求項 1 ~ 3のいずれかに記載の溶湯定量供給装置。  (4) The opening / closing drive means comprises a hydraulic cylinder erected at the upper end of the pot, and a rod-like opening / closing valve is connected to the piston rod of the hydraulic cylinder. The molten metal quantitative supply device according to any one of the above.
5 ポッ ト、 開閉弁及び出湯管は、 それぞれセラ ミ ッ クによって形成 されている請求項 1 ~ 3のいずれかに記載の溶湯定量供給装置。  4. The molten metal fixed-quantity supply device according to claim 1, wherein the five ports, the on-off valve, and the tapping pipe are each formed of a ceramic.
6 ポ ッ 卜の給湯口にはその入口側にセラ ミ ッ ク製のフ ィ ルタ一が取 り付けられている請求項 1〜 3のいずれかに記載の溶湯定量供給装置。  The molten metal metering and feeding device according to any one of claims 1 to 3, wherein a ceramic filter is attached to the inlet of the 6-point hot water supply port.
PCT/JP1998/000416 1997-02-04 1998-01-30 Apparatus for supplying molten metal at predetermined rate WO1998033612A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69833306T DE69833306T2 (en) 1997-02-04 1998-01-30 DEVICE FOR FEEDING METAL MELTS IN SPECIFIED QUANTITIES
EP98901083A EP0901854B1 (en) 1997-02-04 1998-01-30 Apparatus for supplying molten metal at predetermined rate
JP10527550A JP3017540B2 (en) 1997-02-04 1998-01-30 Molten metal feeder

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

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US6841120B2 (en) 2002-06-13 2005-01-11 Alotech Ltd. Llc Dispensing apparatus and method
AT18250U1 (en) * 2021-01-15 2024-07-15 Gg Giesstechnik Gmbh & Co Kg Gas pressure pump for dosing liquid metals

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JP4292585B2 (en) * 2007-04-09 2009-07-08 新東工業株式会社 Low pressure casting apparatus and inert gas filling method
DE102009051879B3 (en) * 2009-11-04 2011-06-01 Baumgartner, Heinrich G. Metal die-casting machine

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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
AT18250U1 (en) * 2021-01-15 2024-07-15 Gg Giesstechnik Gmbh & Co Kg Gas pressure pump for dosing liquid metals

Also Published As

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EP0901854A1 (en) 1999-03-17
EP0901854A4 (en) 2002-01-30
DE69833306T2 (en) 2006-09-07
EP0901854B1 (en) 2006-01-25
DE69833306D1 (en) 2006-04-13

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