JP5326071B2 - Hot water supply apparatus and hot water supply method - Google Patents

Description

The present invention relates to a hot water supply apparatus and a hot water supply method for casting an aluminum alloy or the like.

In the case of casting of an aluminum alloy or the like, in many cases, hot water is drawn mechanically and transferred to a mold by a robot or the like to supply hot water. However, in the case of simply pumping mechanically, the oxide film on the surface of the molten metal in the furnace is agitated significantly, and the oxide film is mixed into the molten metal. There is a problem of doing.
Therefore, as shown in Patent Document 1, a ladle apparatus has been developed in which a molten metal is automatically sucked into a sealed container of a ladle apparatus by a low vacuum, and the ladle apparatus is moved to pour the molten metal into a pouring gate of a mold. .

This ladle device is formed from the container main body configured to be movable, liftable and tiltable forward, and from the tube opening located below the bottom of the container main body to the front of the container main body and extending from the top of the container main body. The outer tube portion formed, the inner tube portion formed continuously from the upper portion of the tube to the lower portion of the container body, and the communication portion formed at the lower portion of the inner tube portion and communicating with the inside of the container body. And a gas control means for depressurizing or pressurizing the inside of the container main body through a gas outflow portion formed in the container main body.
JP-A-11-188475

According to the above-mentioned ladle device, there is an advantage that the molten metal can be automatically sucked up (pumped up) into the container main body, and oxidation of the molten metal can be prevented as much as possible because the sealed container is used.
However, since the inside of the container body is pressurized and the molten metal is supplied to the mold, the flow rate of the molten metal at the time of pouring increases, turbulence occurs at the pouring gate, and the quality of the product is reduced. There is a problem that it is difficult to control the output. Moreover, there exists a subject that a molten metal touches air | atmosphere at the time of molten metal pouring, and oxidation of a molten metal cannot be prevented completely. In addition, since the conduit to the container body consists of an outer pipe part and an inner pipe part that bend, the molten metal tends to remain inside the container body, and it is necessary to discharge the molten metal separately. There are problems such as easy oxidation.
Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a hot water supply apparatus and a hot water supply method capable of easily supplying a molten metal in a constant amount and preventing oxidation of the molten metal.

The hot water supply apparatus according to the present invention includes a container having a storage part in which the molten metal in the furnace is sucked up through a conduit, and the sucked molten metal is stored, and a negative pressure suction part for sucking the molten metal into the container by making the inside of the container negative pressure In a hot water supply apparatus comprising a ladle device having
The ladle device includes a support unit that rotatably supports the container about a rotation axis inclined with respect to a vertical line, a rotation drive unit that rotates the container about the rotation axis, and a support unit that supports the support unit. An advancing / retreating mechanism for advancing and retreating the vessel between the position where the conduit enters the molten metal of the furnace and the position outside the furnace,
The container is rotated on a rotating shaft inclined with respect to the vertical line, and the molten metal is supplied into the container at a position where the bottom of the reservoir is lower than the position of the opening of the conduit in the container. The rotating shaft that is inclined is rotated to supply the molten metal from the inside of the container to the external mold at a position where the bottom of the reservoir is higher than the opening of the conduit in the container .

The rotation axis of the container is provided so as to coincide with the central axis of the conduit.
An inclination angle of the container with respect to a vertical line is variably provided.
The ladle apparatus includes a moving mechanism for moving the ladle apparatus between an upper position of the furnace and an upper position of the mold.
The moving mechanism includes a rotation mechanism that rotates the support portion in a horizontal plane.
The hot water supply device according to claim 5, wherein the rotation mechanism is a cylinder device.
Moreover, it has an inert gas supply part which supplies an inert gas in the said container, It is characterized by the above-mentioned.

The hot water supply method according to the present invention includes a container having a storage part in which the molten metal in the furnace is sucked up through a conduit and the sucked molten metal is stored, and negative pressure suction for sucking the molten metal into the container by making the inside of the container negative pressure A hot water supply device comprising a ladle device having a section,
The ladle device supports the container rotatably about a rotation axis inclined with respect to a vertical line, and a rotation drive unit that rotates the container about the rotation axis;
An advancing / retracting mechanism for moving the container supported by the support portion between a position where the conduit enters the molten metal of the furnace and a position outside the furnace, and the ladle device, A moving mechanism for moving between the upper position of the mold,
The container is rotated on a rotating shaft inclined with respect to the vertical line, and the molten metal is supplied into the container at a position where the bottom of the reservoir is lower than the position of the opening of the conduit in the container. Using a hot water supply device that rotates a rotating shaft inclined to supply the molten metal from the inside of the container to an external mold at a position where the bottom of the reservoir is higher than the opening of the conduit in the container ,
The container is moved by the advance / retreat mechanism, and the tip of the conduit enters the molten metal of the furnace,
Next, the negative pressure suction unit is operated to suck up the molten metal through the conduit into the reservoir of the container,
Next, the container is retracted by the advance / retreat mechanism, the conduit tip is retracted out of the furnace, and then the ladle device is moved from the upper position of the furnace to the upper position of the mold by the moving mechanism,
Next, the container is moved by the advance / retreat apparatus, and the tip of the conduit is made to face the mold gate,
Next, the container is moved by the advancing / retracting mechanism that rotates the container around the rotation shaft by the rotation driving unit, and supplies the molten metal from the storage unit to the mold through the conduit, so that the conduit tip is melted in the furnace. Then, the negative pressure suction part is operated to suck up the molten metal into the container storage part through the conduit, and then the container is retracted by the advance / retreat mechanism to retract the conduit tip part out of the furnace. Next, the ladle device is moved from the upper position of the furnace to the upper position of the mold by the moving mechanism, and then the container is moved by the forward / backward moving device so that the leading end of the conduit faces the pouring gate of the mold, Next, the container is rotated about the rotation shaft by the rotation driving unit, and the molten metal is supplied from the storage unit into the mold through a conduit.

Further, as the hot water supply device, a hot water supply device provided with a variable inclination angle with respect to the vertical line of the container is used, and when the ladle device is moved from the furnace upper position to the upper position of the mold, the inclination angle of the container is changed. The liquid level of the molten metal in the reservoir is adjusted to be lower than the position of the opening in the container of the conduit so that the molten metal does not spill from the conduit due to vibration of the container during movement. And

The hot water supply method according to the present invention includes a container having a storage part in which the molten metal in the furnace is sucked up through a conduit and the sucked molten metal is stored, and negative pressure suction for sucking the molten metal into the container by making the inside of the container negative pressure A hot water supply device comprising a ladle device having a section,
The ladle device supports the container rotatably about a rotation axis inclined with respect to a vertical line, and a rotation drive unit that rotates the container about the rotation axis;
An advancing / retreating mechanism for advancing / retreating the container supported by the support portion between a position where the conduit enters the molten metal of the furnace and a position outside the furnace; and the ladle device at a position above the furnace And a moving mechanism that moves between the upper position of the mold and an inert gas supply unit that supplies an inert gas into the container,
The container is rotated on a rotating shaft inclined with respect to the vertical line, and the molten metal is supplied into the container at a position where the bottom of the reservoir is lower than the position of the opening of the conduit in the container. Using a hot water supply device that rotates a rotating shaft inclined to supply the molten metal from the inside of the container to an external mold at a position where the bottom of the reservoir is higher than the opening of the conduit in the container,
An inert gas is supplied into the container from the inert gas supply unit, the inside of the container is purged with the inert gas, and the inert gas is ejected from the conduit,
Next, the vessel is moved by the advance / retreat mechanism, the conduit is entered into the furnace, an inert gas is blown onto the molten metal surface to break the oxide film on the molten metal surface, and then the leading end of the conduit is placed in the molten metal of the furnace. Then, the negative pressure suction part is operated to suck up the molten metal into the reservoir part of the container through the conduit, and then the container is retracted by the advance / retreat mechanism to retract the conduit tip part out of the furnace. Inert gas is continuously blown from the tip of the conduit,
Next, the ladle apparatus is moved from the upper position of the furnace to the upper position of the mold by the moving mechanism, and then the container is advanced by the advance / retreat apparatus so that the leading end of the conduit faces the mold gate, The rotation drive unit rotates the container around the rotation axis, and supplies the molten metal from the storage unit to the mold through a conduit.

In addition, before supplying the molten metal from the reservoir to the mold through the conduit, an inert gas is supplied into the mold from the conduit and the mold is purged with the inert gas.

According to the present invention, hot water can be easily supplied simply by rotating the container around the rotation axis inclined with respect to the vertical line. At that time, since the molten metal slowly flows down from the storage portion, it is possible to obtain a high-quality cast product without involving air. Moreover, the molten metal does not remain in the container.
Furthermore, if hot water is supplied while supplying an inert gas, oxidation of the molten metal can be suitably prevented.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 2 is a front view of the hot water supply device 10, FIG. 2 is a front view, FIG. 3 is an explanatory view of a state where the molten metal is sucked into the storage portion, and FIG. 4 is an explanatory view of a state where the molten metal is flowed down from the storage portion by rotating the container. FIG.
The hot water supply apparatus 10 includes a container 16 having a storage unit 15 in which a molten metal 12 in a furnace (not shown) is sucked up through a conduit 14 and the sucked molten metal 12 is stored, and sucks air in the container 16 to store the container. A ladle device 19 having a negative pressure suction part including a nozzle 17 for making the inside of the negative pressure 16 negative is provided.

As will be described later, the ladle device 19 includes a support unit that rotatably supports the container 16 about a rotation axis inclined with respect to a vertical line, a rotation drive unit that rotates the container 16 about the rotation axis, The container 16 supported by the support part is provided with an advancing / retreating mechanism for advancing / retreating the conduit 14 between a position where the conduit 14 enters the molten metal 12 of the furnace and a position outside the furnace.

In addition, the storage unit 15 has a required rotational position centered on the rotation axis of the container 16, and the storage surface of the sucked molten metal 12 has the same height as the opening in the container of the conduit 14 (see FIG. 3). The bottom of the reservoir 15 becomes higher than the opening height position in the container 14 of the conduit 14 at another required rotational position around the rotational axis 16, so that the molten metal 12 can flow down through the conduit 14 to the rotational axis of the container 16. It is deviated from the position (see FIG. 4).

Next, the detail of each part is demonstrated.
Reference numeral 20 denotes a turntable that rotates in a horizontal plane. A shaft 21 fixed to the lower surface of the turntable 20 is rotated by being supported by a base 22 via a bearing 23. A rod end of a cylinder device (not shown) is connected to the turntable 20, and is provided so as to be able to reciprocate within a required angle range within a horizontal plane by this cylinder device.
A moving mechanism of the ladle device 19 is configured by the turntable 20, a cylinder device (not shown), and the like. With this moving mechanism, the ladle device 19 can be moved between the upper position of the furnace and the upper position of the mold.
This moving mechanism is not limited to the above. For example, a mechanism in which the base 22 moves in the horizontal direction may be used.

On the upper surface side of the turntable 20, a tilt table 27 is supported so as to be rotatable in a vertical plane around the turning shaft 25. The tilt base 27 is pivotably connected to the end of a rod 29 of a tilt cylinder 28 rotatably attached to the rotary base 20 so that the tilt base 27 can be tilted at a required angle with respect to a vertical line within a vertical plane. Is done.

Two guide poles 30, 30 are arranged on the tilt base 27 in parallel, with both ends fixed to a fixed piece 32 fixed on the chilled base 27.
The guide poles 30, 30 slidably pass through a slide piece 35 fixed to the lower surface side of the slide base 34, whereby the slide base 34 is guided by the guide pole 30 and can move in the vertical direction (oblique direction). It has become.

An L-shaped piece 37 is fixed to the upper end side of the slide table 34, and an end of the rod 39 of the cylinder device 38 fixedly arranged on the upper portion of the chilled table 27 is fixed to one end of the L-shaped piece 37. When the rod 39 is driven in and out, the slide base 34 moves in the vertical direction. In FIG. 1, the code | symbol 37a has shown the position (backward position) where the L-shaped piece 37 raised most.

An elongated support base 40 is fixed on the slide base 34, and bearings 42, 42 are fixed to the upper and lower portions of the support base 40, and a rotating shaft 44 is rotatable about the axis about the bearings 42, 42. It is supported.
The container 16 is fixed to the lower end of the rotating shaft 44.
The slide table 34, the cylinder device 38, and the like constitute an advance / retreat mechanism that causes the container 16 to advance / retreat between a position where the conduit 14 enters the molten metal 12 of the furnace and a position outside the furnace.

In the present embodiment, the axis of the rotary shaft 44 and the axis of the conduit 14 are set to coincide. Note that there may be a slight deviation between the two axes.
The rotating shaft 44 is provided so as to be able to rotate forward and backward via a speed reducer by a motor 46 fixed on the slide base 34. The motor 46, the rotation shaft 44, and the like constitute a rotation driving unit for the container 16.
The turntable 20, the tilt cylinder 28, the advance / retreat mechanism, the rotation drive unit, and the like constitute a support unit that supports the container 16.

The container 16 and the conduit 14 are formed using a heat-resistant material, for example, a ceramic such as alumina.
The rotating shaft 44 is fixed to a portion of the lid body 16 a that seals the inside of the container 16.
The inside of the container 16 is brought to a negative pressure by the internal gas being sucked by the nozzle 17 provided on the lid body 16 a, and the molten metal can be sucked into the container 16 through the conduit 14.

The nozzle 17 is connected to an exhaust device (not shown) through a suction pipe (not shown) disposed outside the container 16. The tip of the nozzle 17 may be bent upward so as not to suck the molten metal directly. These nozzles 17, suction pipes, exhaust devices, etc. constitute a negative pressure suction part.

Further, an inert gas such as nitrogen gas can be supplied into the container 16 through the nozzle 18 . The nozzle 18 is also connected to an inert gas supply source (not shown) through a supply pipe (not shown) disposed outside the container 16. The nozzle 18 is preferably disposed so that the tip of the conduit 14 faces the opening in the container 16 so that the inert gas is supplied into the container 16 and the inert gas can be directly blown into the conduit 14. is there.
These nozzle 19, supply pipe, inert gas supply source, and the like constitute an inert gas supply unit.

A liquid level sensor 48 that detects the liquid level of the molten metal 12 stored in the storage unit 15 is provided in the container 16.
Although not shown, a liquid level sensor for detecting the liquid level of the molten metal in the furnace is also provided in the furnace in which the molten metal 12 is stored.

Next, a hot water supply method using the hot water supply apparatus 10 will be described.
In order to pump up the molten metal in the furnace, first, the turntable 20 is rotated by a cylinder device (not shown), and the ladle device 19 is moved so that the conduit 14 is positioned above the furnace.
Next, an inert gas is introduced into the container 16 from the nozzle 18, the inside of the container 16 is purged with the inert gas, and the inert gas is ejected from the conduit 14.

In this state, the cylinder device 38 is operated, the slide base 34 is lowered, the conduit 14 is lowered together with the container 16, and the tip end portion of the conduit 14 enters the molten metal 12 of the furnace to a required depth.
Since the level of the molten metal level in the furnace is detected by a liquid level sensor (not shown), the cylinder device 38 is controlled to be driven according to this detection signal (the level of the liquid level), and the tip of the conduit 14 is moved to the required depth. It is made to enter the molten metal 12.

Since the inert gas is blown from the tip of the conduit 14, when the tip of the conduit 14 attempts to enter the molten metal 12, the oxide film on the surface of the molten metal 12 is broken by the blown inert gas, and the conduit 14. Enters the pure molten metal 12 having no oxide film.

The container 16 is provided so as to be rotatable around a rotating shaft (rotating shaft 44) inclined with respect to the vertical line. When the molten metal 12 is to be sucked into the container 16, the container 16 The bottom part is located below the opening in the container of the conduit 14, and the container 16 is rotated to a position where the molten metal 12 sucked into the container 16 can be stored in the storage part 15 (FIG. 3).

In the above state, an exhaust device (not shown) is operated, and the inert gas in the container 16 is sucked through the nozzle 17 to make the inside of the container 16 have a negative pressure (pressure lower than atmospheric pressure). Thereby, the molten metal 12 is sucked into the container 16 from the conduit 14 and stored in the storage unit 15. When the melt level in the storage unit 15 is detected by the level sensor 48, the exhaust device is stopped and the suction of the melt is stopped.

When the reservoir 15 is full, the excess molten metal 12 flows down from the conduit 14, so that the fixed amount of molten metal 12 can always be stored in the reservoir 15.
Even in this state, an inert gas is present in the container 16 (or is in a vacuum), so that no oxide film is formed on the molten metal 12 held in the reservoir 15.

As described above, a constant amount of molten metal can always be pumped into the storage unit 15, but by operating the tilt cylinder 28 and changing the inclination angle of the container 16, the bottom of the storage unit 15 can be adjusted with respect to the conduit opening. The height can be varied, whereby the substantial volume of the reservoir 15 can be changed, and the amount of the molten metal 12 can be adjusted.
Alternatively, the substantial volume of the storage unit 15 can also be changed by slightly rotating the rotating shaft 44 and changing the stop position of the container 16.
In this case, it is preferable that the length of the liquid level sensor 48 protruding into the container 16 can be varied so as to be able to cope with fluctuations in the liquid level of the molten metal 12 in the reservoir 15.

When the suction (pumping) of the molten metal into the storage unit 15 is completed, the tilt cylinder 28 is driven to slightly change the inclination angle of the container 16, and the height of the liquid level of the molten metal in the storage unit 15 is increased in the container of the conduit 14. It is good to adjust so that it may become lower than the position of an opening part, and it is good to prevent the molten metal 12 from spilling from the conduit | pipe 14 by the vibration of the container 16, etc. during the transfer of the ladle apparatus 19. FIG.

The cylinder device 38 is then driven to raise the vessel 16 so that the lower end of the conduit 14 is higher than the opening edge of the furnace. Even when the lower end of the conduit 14 rises upward from the molten metal 12, the inert gas supply pressure and the supply amount are adjusted so that the ejection of the inert gas from the lower end of the conduit 14 continues.
The change of the tilt angle of the container 16 by the tilt cylinder 28 (so that the molten metal is not spilled from the storage part) may be performed at the stage where the container 16 is raised above the furnace as described above.

Next, the cylinder device (not shown) is operated, the turntable 20 is rotated by a required angle, the lower end of the conduit 14 of the ladle device 19 is positioned obliquely above the mold gate (not shown), and then the cylinder device 38 is operated. The slide base 34 is lowered and the lower end of the conduit 14 is positioned at the gate.
In this state, it is preferable to supply an inert gas into the mold through the conduit 14 for a while and purge the inside of the mold with the inert gas to prevent oxidation of the molten metal in the mold.

Next, the motor 46 is operated, the rotating shaft 44 is rotated, and the container 16 is rotated. Due to the rotation of the container 16, the storage unit 15 also rotates about the axis of the rotation shaft 44, whereby the bottom of the storage unit 15 rotates to a position higher than the opening in the container of the conduit 14. The inner molten metal 12 gently flows down in the conduit 14 by its own weight, is filled in the mold, and completes the hot water supply.

As the container 16 rotates about the axis of the rotary shaft 44, the bottom of the storage portion 15 gradually rises, and the molten metal 12 in the storage portion 15 travels along the inner wall of the conduit 14 where the molten metal 12 is inclined. Slowly flow down. In the meantime, since the inert gas also flows in the conduit 14, the molten metal 12 is not oxidized in the conduit 14, and the mold 12 is also purged with the inert gas. Since it does not oxidize, a high quality casting is obtained.

As described above, in the present embodiment, hot water can be easily supplied simply by rotating the container 16 around the rotation axis inclined with respect to the vertical line. At that time, since the molten metal slowly flows down from the storage portion, it is possible to obtain a high-quality cast product without involving air. Moreover, the molten metal does not remain in the container.
Furthermore, if hot water is supplied while supplying an inert gas, oxidation of the molten metal can be suitably prevented as described above.
Note that the inert gas is not necessarily supplied.

1 is an explanatory side view of a hot water supply device 10. It is a front view of a hot water supply apparatus. It is explanatory drawing of the state which sucked up hot water supply to the storage part. It is explanatory drawing of the state which rotated the container and made the molten metal flow down from the storage part.

DESCRIPTION OF SYMBOLS 10 Hot-water supply apparatus 12 Molten metal 14 Conduit 15 Storage part 16 Container 17 Nozzle 18 Nozzle 19 Ladle apparatus 20 Rotating base 27 Tilt base 28 Tilt cylinder 30 Guide pole 38 Cylinder apparatus 44 Rotating shaft 46 Motor 48 Liquid level sensor

Claims (12)

A ladle device is provided that has a container having a storage part in which the molten metal in the furnace is sucked up through a conduit and stores the sucked molten metal, and a negative pressure suction part that sucks the molten metal into the container by making the inside of the container have a negative pressure. In the water heater,
The ladle device is
A support portion for rotatably supporting the container around a rotation axis inclined with respect to a vertical line;
A rotation drive unit for rotating the container around the rotation axis;
An advancing and retreating mechanism for advancing and retracting the container supported by the support portion between a position where the conduit enters the molten metal of the furnace and a position outside the furnace;
The container is rotated on a rotating shaft inclined with respect to the vertical line, and the molten metal is supplied into the container at a position where the bottom of the reservoir is lower than the position of the opening of the conduit in the container. The hot water supply apparatus is characterized in that the rotating shaft that is inclined is rotated and the molten metal is supplied from the inside of the container to the external mold at a position where the bottom of the reservoir is higher than the opening of the conduit in the container . The hot water supply apparatus according to claim 1, wherein a rotation axis of the container is provided so as to coincide with a central axis of the conduit.     The hot water supply apparatus according to claim 1 or 2, wherein an inclination angle of the container with respect to a vertical line is variably provided.     The hot water supply apparatus according to any one of claims 1 to 3, further comprising a moving mechanism that moves the ladle apparatus between an upper position of the furnace and an upper position of the mold.     The hot water supply apparatus according to claim 4, wherein the moving mechanism includes a rotation mechanism that rotates the support portion in a horizontal plane.     The hot water supply device according to claim 5, wherein the rotation mechanism is a cylinder device.     The hot water supply apparatus according to any one of claims 1 to 6, further comprising an inert gas supply unit configured to supply an inert gas into the container. A ladle device is provided that has a container having a storage part in which the molten metal in the furnace is sucked up through a conduit and stores the sucked molten metal, and a negative pressure suction part that sucks the molten metal into the container by making the inside of the container have a negative pressure. A water heater,
The ladle device is
A support portion for rotatably supporting the container around a rotation axis inclined with respect to a vertical line;
A rotation drive unit for rotating the container around the rotation axis;
An advancing / retracting mechanism for moving the container supported by the support portion between a position where the conduit enters the molten metal of the furnace and a position outside the furnace, and the ladle device, A moving mechanism for moving between the upper position of the mold,
The container is rotated on a rotating shaft inclined with respect to the vertical line, and the molten metal is supplied into the container at a position where the bottom of the reservoir is lower than the position of the opening of the conduit in the container. Using a hot water supply device that rotates a rotating shaft inclined to supply the molten metal from the inside of the container to an external mold at a position where the bottom of the reservoir is higher than the opening of the conduit in the container ,
The container is moved by the advance / retreat mechanism, and the tip of the conduit enters the molten metal of the furnace,
Next, the negative pressure suction unit is operated to suck up the molten metal through the conduit into the reservoir of the container,
Next, the container is retracted by the advance / retreat mechanism, the conduit tip is retracted out of the furnace, and then the ladle device is moved from the upper position of the furnace to the upper position of the mold by the moving mechanism,
Next, the container is moved by the advance / retreat apparatus so that the tip of the conduit faces the mold gate,
Next, the hot water supply method is characterized in that the container is rotated about the rotation shaft by the rotation driving unit, and the molten metal is supplied from the storage unit into the mold through a conduit.     As the hot water supply device, further using a hot water supply device provided with a variable inclination angle with respect to the vertical line of the container, when the ladle device is moved from the furnace upper position to the upper position of the mold, the inclination angle of the container is changed, The liquid level of the molten metal in the reservoir is adjusted to be lower than the position of the opening in the container of the conduit, so that the molten metal does not spill from the conduit due to vibration of the container during movement. The hot water supply method according to claim 8. A ladle device is provided that has a container having a storage part in which the molten metal in the furnace is sucked up through a conduit and stores the sucked molten metal, and a negative pressure suction part that sucks the molten metal into the container by making the inside of the container have a negative pressure. A water heater,
The ladle device is
A support portion for rotatably supporting the container around a rotation axis inclined with respect to a vertical line;
A rotation drive unit for rotating the container around the rotation axis;
An advancing / retracting mechanism for moving the container supported by the support portion between a position where the conduit enters the molten metal of the furnace and a position outside the furnace, and the ladle device, A moving mechanism for moving between the upper position of the mold,
An inert gas supply unit for supplying an inert gas into the container,
The container is rotated on a rotating shaft inclined with respect to the vertical line, and the molten metal is supplied into the container at a position where the bottom of the reservoir is lower than the position of the opening of the conduit in the container. Using a hot water supply device that rotates a rotating shaft inclined to supply the molten metal from the inside of the container to an external mold at a position where the bottom of the reservoir is higher than the opening of the conduit in the container,
An inert gas is supplied into the container from the inert gas supply unit, the inside of the container is purged with the inert gas, and the inert gas is ejected from the conduit,
Next, the vessel is moved by the advance / retreat mechanism, the conduit is entered into the furnace, an inert gas is blown onto the molten metal surface to break the oxide film on the molten metal surface, and then the leading end of the conduit is placed in the molten metal of the furnace. Let it go,
Next, the negative pressure suction unit is operated to suck up the molten metal through the conduit into the reservoir of the container,
Next, the container is retracted by the advance / retreat mechanism, the conduit tip is retracted out of the furnace, and the inert gas is continuously blown out from the conduit tip,
Next, the moving mechanism moves the ladle device from the upper position of the furnace to the upper position of the mold,
Next, the container is advanced by the advance / retreat device, and the tip of the conduit faces the mold gate,
Next, the hot water supply method is characterized in that the container is rotated about the rotation shaft by the rotation driving unit, and the molten metal is supplied from the storage unit into the mold through a conduit.     The inert gas is supplied into the mold from the conduit into the mold before the molten metal is supplied from the reservoir to the mold through the conduit, and the mold is purged with the inert gas. Hot water supply method.     As the hot water supply device, further using a hot water supply device provided with a variable inclination angle with respect to the vertical line of the container, when the ladle device is moved from the furnace upper position to the upper position of the mold, the inclination angle of the container is changed, The liquid level of the molten metal in the reservoir is adjusted to be lower than the position of the opening in the container of the conduit, so that the molten metal does not spill from the conduit due to vibration of the container during movement. The hot water supply method according to claim 11.

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