JPH07132360A - Conduit type molten metal supplying device - Google Patents

Abstract

PURPOSE:To safely supply molten metal even in the case of sticking foreign matter to a seal surface by arranging a small capacity of molten metal storing part from the tip part of a trough for supplying the molten metal through a reverse U-shape tube and arranging a valve seat part having a molten metal discharging hole at the bottom part of the molten metal storing part and a weighing valve rod being freely opened/closed to the valve seat part. CONSTITUTION:The small capacity of molten metal storing part 80 is arranged from the tip part of the trough 1 for supplying the molten metal through the reverse U-shape tube to pour the desired molten metal quantity into an injection sleeve 3 from the molten metal storing part 80. At the time of completing the pouring of molten metal, the weighing valve rod 26 is descended and abutted on the valve seat part 81 to execute the seal. Further, the valve seat part 81 is arranged so as to become the same level as the bottom part of the molten metal storing part 80, and the holding heat of the molten metal is supplemented to prevent the development of the solidified material at the valve seat part 81. By this method, as the valve seat part 81 is directly arranged to a vessel member contacting with the molten metal in the molten metal storing part 80, the intrusion of the molten metal between the vessel member and a value seat sleeve is eliminated. Wire cutting and malfunction of a heater caused by the leaked molten metal are eliminated and the repair is unnecessary, and the productivity is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduit type water heater for supplying a molten metal such as an aluminum alloy to an injection sleeve of a die casting machine.

[0002]

2. Description of the Related Art Conventionally, when supplying molten metal to an injection sleeve of a die casting machine, for example, Japanese Patent Publication No. 60-2
As described in Japanese Patent No. 5220, a dedicated molten metal holding furnace is arranged near the die casting machine, and the holding furnace measures and conveys the molten metal and pours the molten metal. For measuring / conveying and pouring methods, refer to Japanese Patent Publication No. 60-2522.
As described in Japanese Unexamined Patent Publication No. 0, a method using a ladle and a method of pumping a pipe by an electromagnetic induction pump have been mainstream in practical use.

However, each of these has the following drawbacks. (1) Ladle method: The molten metal is exposed to the outside air and is oxidized, and the temperature is lowered. (2) Electromagnetic induction pump method: Since the molten metal driving force of the electromagnetic pump is weak, the measuring accuracy is poor. Further, in order to increase the molten metal propulsion force, the power supply device becomes large in scale, and the cost and space are deteriorated. Further, the cost also increases for the thermal expansion correspondence and maintenance of the pressure feeding pipe. Further, as a common drawback, a dedicated molten metal holding furnace becomes redundant, which lowers productivity.

The die casting industry is also a representative of workplaces with a bad working environment. The main causes are scattering of the mold release agent and heat dissipation of the molten metal holding furnace and its peripheral equipment. The following are the current problems with molten metal operation. (1) A large-capacity holding furnace is installed on the side of the die casting machine, and moreover, a large amount of heat is dissipated. (2) The mechanism of the hot water supply device is mainly an open type, and a large amount of heat was dissipated to the work place. (3) As a result of (1) and (2), not only the working environment is deteriorated, but also the thermal efficiency is deteriorated. To solve this problem, a small capacity, closed gutter type continuous furnace and a highly accurate metering valve device are required.

By the way, the valve type hot water supply method has not been put to practical use in the die casting industry. The main reasons for this are as follows. (1) The main method was to hold a large amount of molten metal on the side of the die casting machine. As a result, there was no valve mechanism that could withstand the high temperature atmosphere. (2) The measurement accuracy varied due to changes in the properties of the molten metal, and it was not practical.

Therefore, in order to solve these problems, the applicant company of the present invention, for example, like the invention of Japanese Patent Application No. 4-272212 which has not been published at the time of the present application, the tip of the gutter for hot water distribution. A gutter-shaped box that can be sealed is placed between the pouring port of the injection sleeve and the injection sleeve, and the melt of the distribution gutter is changed according to the pouring amount from the metering pouring valve device provided at the lower end of the gutter-shaped box. By the siphon action of the inverted U-shaped tube provided between the tip of the hot water distribution gutter and the rear end of the gutter box, the hot water distribution gutter is automatically moved into the gutter box, As the pouring valve device, a valve seat of the drain port and a valve rod that can be opened and closed with respect to the valve seat are used. Invented a gutter type water heater.

Japanese Patent Application No. 4-272212 has a structure as shown in FIG. In Fig. 5, reference numeral 1 is a gutter for hot water distribution, which is also called a gutter of a launder system capable of unmanned hot water distribution, and usually has a melt receiving port on one side, depending on the number and position of die casting machines from the middle. It has a branch part. In the hot water distribution gutter 1 shown in FIG. 5, only the tip of this branched portion is shown. A gutter-shaped box 2 is provided so as to be swingable around the tip of the hot water distribution gutter 1 and near the tip of the hot water distribution gutter 1, and the inside is hermetically sealed. 3 is injection sleeve of die casting machine, 3
Reference numeral a is a pouring port, 4 is a plunger tip slidably provided in the injection sleeve 3, and 5 is a plunger.

The gutter-shaped box body 2 is provided so as to be vertically swingable around the swing center portion 6 between, for example, an original position in a horizontal state and an inclined position in which θ = 15 degrees is lifted. Has been. Reference numeral 7 is a cylinder for vertically swinging the gutter-shaped box body 2. 8 is a stopper for adjusting the horizontal position which is the lower limit position, and 9 is a frame. The gutter-shaped box body 2 is inclined so as not to interfere with the maintenance of the injection sleeve 3 and the plunger tip 4 and to return the molten metal from the gutter-shaped box body 2 to the hot water distribution gutter 1. The gutter-shaped box 2
Should be able to move horizontally.

Generally, the gutter-shaped box body 2 constituting the gutter type water heater arranged between the most distal end of the hot water distribution gutter 1 which is a fixed gutter and the injection sleeve 3 is mainly composed of the gutter part 11, It is composed of a gutter lid 12, and an injection sleeve 3 is provided near the tip of the gutter-shaped box body 2.
Metering pouring valve device 1 located directly above the pouring port 3a
3, and an inverted U-shaped pipe device 14 is provided on the hot water distribution gutter 1 side. The gutter part 11 is composed of a tank member 16 that comes into contact with the molten metal 15a, a heat insulating member 17 that keeps it warm, and a box body 18 that stably holds these.

The gutter lid 12 includes a heat retaining member 19 and an exterior member 20.
A heater 21 is attached to the inside of the heat retaining member 19 for retaining or heating the melt 15a in the chamber A, which is the melt passage or the melt reservoir. In addition to the above, the gutter lid portion 12 has a drive mechanism 22 and a servomotor 23, which include a rotation / linear motion converting mechanism using a ball screw of the metering pouring valve device 13, a molten metal surface for control data, for example, a reflection type photoelectric tube type. The sensor 24 and the same temperature sensor 25 are attached. Reference numeral 24a is a molten metal level signal generator, and 25a is a molten metal temperature signal generator. On the other hand, the metering pouring valve device 13
Is composed of a servo motor 23, a drive mechanism 22, a ceramic metering valve rod 26, a ceramic valve seat sleeve 27, a heater 28, a guide pipe 29, and the like. The valve seat sleeve 27 is embedded from the inner surface of the tank member 16 toward the bottom of the heat retaining member 17, and a heater 28 is embedded in the outer periphery of the valve seat sleeve 27 inside the heat retaining member 17. The leading end of the metering valve rod 26 is provided so as to be able to come into contact with or separate from the lower end hole of the valve seat sleeve 27, and is vertically movable and can be opened and closed with a rotation operation. In addition,
The servomotor 23 receives the pouring command, and the controller causes
It is controlled by various information so that accurate measurement can be performed.

The inverted U-shaped tube device 14 has an inverted U-shape whose ends are respectively located in the lower part of the A chamber in the gutter-shaped box body 2 and in the lower part of the B chamber, which is the molten metal passage in the hot water distribution gutter 1. It is composed of a tube 30 and a heater 31 of an electromagnetic induction system that heats and heats the tube 30 from the surroundings, is fixed to the gutter portion 11, and moves integrally when the entire gutter box body 2 swings. In the heat retaining member 32 portion of the hot water distribution gutter 1, the space 33 provided around the inverted U-shaped tube 30 is a movement allowance at this time. The inverted U-shaped pipe device 14 allows the molten metal 15b to pass through and move the entire hot water supply device.

A heat insulating material 35 is arranged between the gutter-shaped box body 2 and a part of the hot water distribution gutter. The heat insulating material 35 is preferably elastic, such as ceramic wool. This is because the gap changes due to the swing of the main body. 36 is a gas exhaust passage provided in the heat retaining member 19, 37 is a suction pressurizing device which is also a pressurizing / depressurizing device, 38 is a passage for an inert gas provided in the heat retaining member 19, 38a is an opening / closing valve, 39 is an inert gas It is a supply device.

FIG. 6 shows the metering pouring valve device 13 in detail, so that the tip of the ceramic metering valve rod 26 can come into contact with or separate from the lower end hole of the ceramic valve seat sleeve 27. It is installed so that it can move up and down and open and close. The upper end portion of the metering valve rod 26 is connected to the shaft 41 via a coupling portion 40 having a screw portion, a taper portion, or the like.

The coupling portion 40 is required to have a function of reliably holding the metering valve rod 26 in the high temperature atmosphere without misalignment. The metering valve rod 26 is inserted into the lower end of the holding rod 40a, and is securely held by the tapered portion 40c of the outer sleeve 40b.
An adjusting nut 54 is provided above the holding rod 40a to generate a constant surface pressure on the tapered portion 40c. Therefore, the coupling 55 and the outer sleeve 40b are provided on the upper surface 54a of the nut.
Causes a predetermined force to be applied. On the other hand, the coupling 55
Is keyed to the shaft 41, the rotary reciprocating motion of the shaft 41 can be transmitted to the metering valve rod 26.

Reference numeral 42 denotes a tubular body fixedly attached to a bracket 43 attached to the gutter lid portion 12, and a ball screw 44 is provided between the outer peripheral surface portion of the shaft 41 and the inner peripheral surface portion of the tubular body 42. The shaft 41 is rotatably and vertically movable. Reference numeral 45 denotes a toothed belt pulley attached to the upper end of the shaft 41, and 46 denotes a toothed belt, which is the servo motor 23 which is the pulse motor shown in FIG.
Are linked to. Since the tubular body 42 is a fixed portion, the shaft 41, the belt pulley 45, and the like rotate, for example, 15
Move up and down by about mm. In this case, since the belt 46 is flexible, the belt pulley 45 can be slightly moved up and down. Therefore, the metering valve rod 26 has a structure that also rotates during the valve opening / closing operation. The rotation of the metering valve rod 26 is carried out in order to remove foreign matter adhering to the valve sealing surface 27a and to make the metering valve rod 26 have an automatic centripetal property.
The servomotor 23 receives a pouring instruction and the like, and is controlled by the control device according to various information so that accurate measurement is performed.

Next, the operation in this example will be described step by step. 1. State at the start of operation (see FIG. 5) (1) A state in which the molten metal 15b is contained in the chamber B as shown in the figure, but the molten metal 15a is not contained in the chamber A closed by the metering pouring valve device 13. Then, the inert gas fills the A chamber through the on-off valve 38a and the passage 38. The molten metal has not yet entered the inverted U-shaped tube 30. (2) The suction pressurizing device 37 is operated to reduce the pressure in the chamber A to a pressure corresponding to H, and the molten metal 15b is passed through the inside of the inverted U-shaped tube 30 and sucked into the chamber A. (3) Once the flow starts, the suction is stopped, and even if the pressure is released to the atmosphere, the siphon causes the molten metal to flow at a differential pressure of h with respect to the surface of the molten metal 15b. This differential pressure h does not change until the surface of the molten metal 15a rises and reaches the lower surface of the inverted U-shaped tube 30. After reaching, the surface of the molten metal 15a rises due to the differential pressure of Δh and Δh
= 0, that is, when the liquid levels of the molten metal 15a and 15b become the same height, the flow of the molten metal 15a through the inverted U-shaped tube 30 is stopped. (4) At this time, the values of the melt surface sensor 24 and the temperature sensor 25 are taken in by a servo motor control device (not shown),
Wait for the pouring start signal together with other setting data such as pouring amount.

2. Operation during production operation (normal) (1) In response to a pouring command from the die casting machine main body, the servo motor 23 is activated and the metering valve rod 26 is raised, whereby the valve is opened and the molten metal 15a is injected into the injection sleeve 3 It begins to flow in. (2) After a lapse of a predetermined time, the control device lowers the metering valve rod 26, the valve is closed, and the pouring is completed. When the metering valve rod 26 is lowered, by rotating the metering valve rod 26 about its axis, foreign substances adhering to the sealing surface of the valve seat sleeve 27 can be removed and a centripetal action can be given to the metering valve rod 26. The sealing effect becomes more stable.

(3) In this case, the temperature of the molten metal 15b in the B chamber is set to the minimum temperature T _B required for hot water distribution, and the temperature of the molten metal 15a in the A chamber is set to T _A required for casting, T _A
Carry out the operation in relation to> T _B. Therefore, the temperature of the molten metal 15a is set to a desired temperature by the action of the electromagnetic induction type heater 31 and the heater 21 that can be quickly heated. This is B
If the molten metal 15b in the room is high, a large amount of oxide film is likely to be generated on the surface, and the quality of the molten metal deteriorates due to deterioration. To prevent this, the molten metal should be poured just before pouring into the injection sleeve 3. This is because only 15a has a necessary temperature.

(4) Further, as the heater 31 of the inverted U-shaped tube 30, an electromagnetic induction type heater is used to heat the molten metal inside and to apply the thrust in the flow direction to the molten metal inside to make the molten metal 15b in the B chamber A Move it to the room as quickly as possible. (5) In the metering control, the valve opening degree or the valve opening time of the metering pouring valve device 13 is determined based on one or more data among the molten metal surface position in the chamber A, the molten metal temperature, the molten metal viscosity, and the material characteristics of the molten metal. The amount is increased / decreased so that the amount poured into the injection sleeve 3 and the liquid surface of the molten metal 15a in the chamber A before pouring are the same each time. (6) In this case, the metering valve rod 2 is used as the monitoring value of the valve closed state.
The lower limit position error amount of 6 may be used, or the abnormal current value of the servo motor 23 may be used. (7) When the pouring is completed, an injection command is issued to the die casting machine body to complete one cycle.

[0020]

In the example shown in FIGS. 5 and 6, as described above, the metering pouring valve device 13 is used.
Is composed of a servomotor 23, a drive mechanism 22, a ceramic metering valve rod 26, a ceramic valve seat sleeve 27, a heater 28, a guide pipe 29, and the like. The valve seat sleeve 27 is an inner surface portion of the tank member 16. From heat insulation member 17
Embedded towards the bottom. A heater 28 is embedded in the outer periphery of the valve seat sleeve 27 inside the heat insulating member 17. On the other hand, the gutter-shaped box body 2 includes a tank member 16 and a heat insulating member 1.
7 and a box 18 for holding them, but they had the following drawbacks. (1) The valve seat sleeve 27 is embedded from the inner surface of the tank member 16 toward the bottom of the heat retaining member 17, but the linear expansion coefficient due to the different materials of the valve seat sleeve 27, the tank member 16 and the heat retaining member 17. Valve seat sleeve 2 made of ceramic with a low coefficient of linear expansion when the temperature rises due to
7, a gap is formed between the tank 7, the tank member 16, and the heat insulating member 17, and the molten metal enters. The invading molten metal causes a short circuit of the heater 28 embedded in the outer periphery of the valve seat sleeve 27, and as a result, the heater 28 is disconnected. (2) Since the temperature between the valve seat sleeve 27, the tank member 16 and the heat retaining member 17 becomes the highest, the molten metal leaks out of the furnace. (3) When the heater 28 is disconnected, the tank member 16 and the heat insulating member 17 need to be replaced and repaired, which causes a long machine stop time and an expensive repair cost.

[0021]

In order to eliminate these drawbacks, in the present invention, a small-capacity molten metal reservoir is provided from the tip of a hot water distribution gutter via an inverted U-shaped pipe. Is provided with a valve seat portion having a hot water outlet at the bottom and a metering valve rod that can be opened and closed with respect to the valve seat portion.

[0022]

Function: A small-capacity molten metal reservoir is provided from the tip of the distribution gutter through the inverted U-shaped tube, and a desired amount of molten metal is poured from the molten metal reservoir into the injection sleeve. When the pouring is completed, the metering valve rod is lowered and brought into contact with the valve seat to seal. Further, by disposing the valve seat portion so as to be flush with the bottom portion of the molten metal reservoir, the heat retained by the molten metal is replenished and the solidified material is prevented from being generated at the valve seat portion.

[0023]

The embodiment of the present invention is an improvement of a part of the one shown in FIG. 5, so that the description of the whole is omitted and only the improved part is shown in FIG. 1, FIG. 2, FIG. As shown in FIG. It should be noted that the same numbers are given to the parts having the same structure as the conventional example.

In this embodiment, the small-capacity molten metal reservoir 80 arranged between the tip of the hot water distribution gutter 1 which is a fixed gutter and the injection sleeve 3 is mainly composed of the outer wall portion 86 and the lid portion 82. In the vicinity of the tip of the molten metal reservoir 80, there is a metering pouring valve device 50 located immediately above the pouring port 3a of the injection sleeve 3, and an inverted U-shaped pipe device on the side of the hot water distribution gutter 1. 14 are provided.

The molten metal reservoir 80 will be described in detail.
The tank member 16 is in contact with 5a, a holding member 85 for stably holding the tank member 16, and a heat insulating member 17 filled in the outer peripheral portion of the tank member 16. Further, the lid portion 82 is composed of the heat retaining member 19 and the exterior member 20, and a heater 87 for retaining or heating the molten metal 15a in the chamber A for the molten metal is attached to the inside of the heat retaining member 19, and the lid is further provided. Part 8
A temperature sensor 25 is attached to 2.

As shown in FIG. 4, a metering pouring valve device 50 provided at the tip of the gutter-shaped box body 2 includes a metering valve rod 26, a valve seat sleeve 27, a guide pipe 29 constituting a cylindrical partition wall, and a coupling. 60, a connecting rod 61, a guide device 63, a floating joint 71, and an air cylinder 72.

In this embodiment, in order to pour a predetermined amount of the molten metal 15a into the injection sleeve 3 (opening operation) or to stop the pouring (closing operation), the air for moving the metering valve rod 26 up and down is used. The cylinders 72 are arranged so as to be positioned on the same axis as the metering valve rod 26, and then mounted on a support box 75 having both side surfaces opened. Further, the connecting rod 61 and the metering valve rod 26, which are suspended below the air cylinder 72 via a floating joint 71 attached to a rod 72a, are connected by a coupling 60. The connecting rod 61 is guided by a bush 64 incorporated in the guide device 63, but a difference in thermal expansion amount between the connecting rod 61 and the bush 64 due to a temperature difference between the lid portion 82 and the valve seat portion 81 of the molten metal reservoir portion 80. A gap 65 is provided so as to absorb the misalignment caused by. The floating joint 71 has an automatic centering mechanism.

If the drive mechanism at the upper end of the metering valve rod 26 is structured as described above, the temperature of the metering valve rod 26 changes significantly and the axis of the metering valve rod 26 faces the metering valve rod 26. Even if the axial center of the seal surface 81a, which is the contact surface of the valve seat portion 81 of the tank member 16 that opens or closes the valve by changing the axial center of the floating joint 71, the guide device 63 is provided. The gap 65 allows the axes to be aligned with each other, and has an effect that the metering valve rod 26 operates smoothly.

The taper-shaped valve seat portion 81 provided as a part of the tank member 16 is provided with a hot water outlet 89 for supplying hot water to the injection sleeve 3 through the guide pipe 29. In particular, the amount of molten metal stored in the tank member 16 of the molten metal reservoir 80 has a volume capable of supplying at least twice as much hot water as at least once. The hot water supply amount is not limited to twice or more, and may be one or more times.

An inverted U-shaped pipe device 14 is provided in a connecting portion 90 for connecting the molten metal distribution trough 1 and the molten metal reservoir 80, and the lower part of the A chamber in the molten metal reservoir 80 and the molten metal distribution trough. Inverted U-shaped tubes 30 whose ends are respectively located in the lower part of chamber B, which is the molten metal passage in 1
And an electromagnetic induction type heater 3 that heats and heats it around
1 and a support member 97 for stably supporting the inverted U-shaped tube 30, and is configured to move integrally when the entire molten metal pool 80 swings.

Although not shown, a gas exhaust passage 36, a suction pressurizing device 37, an inert gas passage 38, an inert gas supply device 39 and the like are attached as in the conventional device.

The molten metal reservoir 80 is centered on the swing center portion 6 and the molten metal reservoir 80 is supplied from the horizontal state to the injection sleeve 3.
In order to stop the hot water supply to the room A and return the molten metal 15a from the room A to the room B through the inverted U-shaped tube 30 once, for example,
A stopper 92 for restricting the tilt angle when the tilted state is lifted up by about a degree is attached via a fixed plate 94 arranged between the molten metal reservoir 80 below the connecting portion 90 and the hot water distribution trough 1.

A cylinder 96 is provided on one side of the connecting portion 90 as shown in FIG. 2 in order to move the molten metal reservoir 80 up and down within a certain range around the swing center portion 6. In addition,
In this embodiment, ceramic is used for the metering valve rod 26, the tank member 16 and the inverted U-shaped tube 30.

The pouring work with the above configuration will be described. Figure 1
In FIG. 4 and FIG. 4, the molten metal reservoir 80, for example, the required amount of molten metal 15b for two times of the molten metal 15b is fed from the hot water distribution trough 1 through the inverted U-shaped pipe 30 by the procedure described in the conventional apparatus, Insulation and heating are successively performed in the molten metal pool 80.

Next, after pouring into the injection sleeve 3 for a predetermined time, the metering valve rod 26 descends due to the action of the air cylinder 72 and abuts on the sealing surface 81a of the valve seat sleeve 27, and completely seals so as to prevent leakage. To do. Injection sleeve 3
When a predetermined amount of molten metal is poured in, the height of the molten metal in the molten metal reservoir 80 drops by Δh corresponding to the amount of molten metal. Then, if a head difference of Δh is generated between the molten metal in the hot water distribution trough 1 and the siphon action, the molten metal 15b in the hot water distribution trough 1 moves into the molten metal reservoir 80, The molten metal 15a and the molten metal 15b in the distribution gutter 1 are at the same level, and the movement of the molten metal 15b is stopped.

Under the above-mentioned condition, a continuous operation is usually performed for a long period of time, and the pouring work is repeated by repeatedly opening and closing by the vertical movement of the metering valve rod 26, but the metering valve rod 26 and the valve seat portion 81 are used.
When the seal surface 81a is scratched or damaged due to foreign matter being caught during repeated abutting, and it becomes impossible to completely seal the molten metal 15a, first, the connecting portion shown in FIGS. Cylinder 96 provided on the side of 90 swings and inclines to a predetermined angle, and hot water distribution gutter 1
Stop the siphon action from the molten metal reservoir 80. The swing center at this time is number 6.

After the damaged or damaged metering valve rod 26 or tank member 16 is replaced with a new one, it is assembled again in the state shown in FIG. 1 or 4. After this, the molten metal reservoir 80 that was tilted while the metering valve rod 26 was still closed was returned to the horizontal state again, and a part of the molten metal 15b was circulated into the molten metal reservoir 80 through the inverted U-shaped tube 30. Molten metal with desired temperature 1
After heating to 5a, the metering valve rod 26 is raised to pour the injection sleeve 3 with molten metal.

[0038]

As is apparent from the above description, in the hot water supply apparatus according to the present invention, a small-capacity molten metal reservoir is provided from the tip of the hot water distribution gutter via the inverted U-shaped pipe, By providing a valve seat with a hot water outlet at the bottom of the reservoir and a metering valve rod that can be opened and closed with respect to the valve seat, the valve seat or metering valve rod should be damaged and the molten metal should flow out. In this case, the entire molten metal reservoir is tilted to cut off the siphon action of the U-shaped tube, but the amount of molten metal itself in the molten metal reservoir is small, so the amount of molten metal flowing out is small and it is safe. Also, since the valve seat is provided directly on the tank member that comes into contact with the molten metal in the molten metal reservoir, the molten metal does not enter between the tank member and the valve seat sleeve as in the conventional case, and the leaked molten metal causes the heater to break. Productivity is improved because there is no need to stop the machine for a long time for repairs.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part showing an embodiment of an apparatus of the present invention.

FIG. 2 is a plan view of the device shown in FIG.

FIG. 3 is a front view as seen from AA of FIG.

FIG. 4 is a vertical sectional view showing an example of a metering pouring valve device.

FIG. 5 is an overall vertical sectional view showing an example of a conventional device.

6 is a vertical cross-sectional view of a main part of the conventional device shown in FIG. 5 according to the present invention.

[Explanation of symbols]

 1 gutter for hot water distribution 2 gutter-shaped box body 3 injection sleeve 8, 92 stopper 13, 50 metering pouring valve device 14 inverted U-shaped pipe device 15a, 15b molten metal 21, 28, 87 heater 22 drive mechanism 23 servo motor 24 molten metal surface Sensor 25 Temperature sensor 26 Metering valve rod 27 Valve seat sleeve 27a, 81a Sealing surface 30 Reverse U-shaped tube 31 Heater (electromagnetic induction type) 37 Suction pressurizing device 39 Inert gas supply device 40 Coupling part 44 Ball screw 46 Belt 55 , 60 coupling 61 connecting rod 63 guide device 71 floating joint 72 air cylinder 80 molten metal pool 81 valve seat 82 lid 85 holding member 86 outer wall 89 hot water outlet 90 connecting part 94 fixing plate 96 cylinder 97 supporting member

Claims (1)

[Claims] 1. A valve seat portion having a small-capacity molten metal reservoir from a tip of a hot water distribution gutter via an inverted U-shaped pipe, and a valve seat portion having a drainage port at the bottom of the molten metal reservoir portion, and the valve seat portion. In contrast, a conduit type hot water supply device is provided with a metering valve rod that can be opened and closed.