JPH09108816A - Device for discharging molten metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the mechanism of a molten metal discharging device, to lower the equipment expense and to improve the durabilifiy by introducing molten metal into a pressurizing chamber, flowing pressed air into the pressurizing chamber and flowing out a fixed quantity of the molten metal to the outer part. SOLUTION: The molten metal 3 in a melting vessel 2 is fed into a closed pressurizing device 6 through a connecting tube 4. In the connecting tube 4, a non-return valve 5 is arranged, and the closed pressurizing device 6 is formed to the closed type pressurizing chamber S. The pressed air controlling the pressure with an air pressure control device 7 is flowed into the pressurizing chamber S through an air pipe 8. The molten metal in the closed pressurizing device 6 pressed with the pressed air is not returned back to the melting vessel 2 by action of the non-return valve 5 and carried into a receiving mold 11 through a molten metal supplying pipe 10. The discharging quantity of the molten metal can be changed by changing a pressure pattern of the pressed air. Since movable parts are little, the mechanism is simplified and the equipment 1 can be constructed at low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molten metal cutting device which conveys a fixed amount of molten metal to the outside.

[0002]

2. Description of the Related Art Conventionally, a molten metal cutting device is constructed as shown in a schematic view in FIG. 5, and a cylinder 52 is arranged in a melting tank 51 containing a molten metal 54. By vertically moving the piston 53 in the cylinder 52, the molten metal 54 in the melting tank 51 can be supplied to an external receiving mold 56 via the hot water supply pipe 55 by a constant amount corresponding to the moving amount of the piston 53. Has been done. However, in such a conventional structure, the dissolution tank 5
Since the structure in which the cylinder 52 having the piston 53 is installed in the No. 1 structure, the structure becomes complicated, and the piston 53 and the like are deteriorated, resulting in poor durability.

[0003]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above conventional problems, and an object thereof is to provide a molten metal cutting device having a simple mechanism capable of suppressing deterioration of equipment. The first gist of the invention is to introduce the molten metal in the melting tank into the pressurizing chamber, introduce pressurized air from the air pressure control device into the pressurizing chamber, and control the pressure in the pressurizing chamber with the pressurized air. Thus, the fixed amount of molten metal is made to flow out from the pressurizing chamber. The second gist of the present invention is to provide a melting tank for producing molten metal therein, a closed pressurizing device having a closed pressurizing chamber, and a molten pressurizing device for melting molten metal in the melting tank. It is connected to the motor valve for transferring into the pressurizing chamber and the closed pressurizing device, and the pressure of the pressurizing chamber is set by changing the output of the control valve by the control based on the setting pattern and inserting the pressurized air into the pressurizing chamber. The main components are an air pressure control device that can be controlled according to a pattern, and a hot water supply pipe that is connected to the closed pressurization device and that causes molten metal to flow out to the outside.

[0004]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic structure of a molten metal cutting device of the present invention, in which a molten metal 3 is put in a melting tank 2, and a connecting pipe 4 is connected to the outside of the melting tank 2. A sealing pressurizing device 6 is connected to an end of the connecting pipe line 4, and a check valve 5 is arranged in the connecting pipe line 4. The inside of the closed pressurizing device 6 is a closed pressurizing chamber S, and pressurized air can be introduced into the pressurizing chamber S from the outside via an air pipe line 8. It is controlled by the control device 7 and placed in the pressurizing chamber S,
The pressure inside the pressurizing chamber S is controlled on the basis of a constant pressure pattern, and a predetermined amount of the molten metal 3 inside the pressurizing chamber S is passed through the hot water supply pipe 10 to the outside of the receiving mold 11.
It is configured so that it can be transported and supplied to. A compressor 9 is connected as an air source of the air pressure control device 7. The pressure inside the pressurizing chamber S may be controlled by introducing an inert gas into the pressurizing chamber S instead of air. With such a configuration, since there are few moving parts as in the conventional case, the mechanism can be simplified and the equipment can be constructed at low cost, and the deterioration of the equipment can be suppressed.

FIG. 2 shows a more detailed concrete example of the molten metal cutting device. That is, in FIG. 2, the same members as those in FIG.
The melting tank 2 contains PEG (polyethylene glycol) 15 for dissolving a metal in the melting tank 2, and three plugs are hung downward from the upper surface of the melting tank 2. A heater 12 is provided, and a thermocouple 13 is vertically provided on the side, and the PEG (polyethylene glycol) 15 is provided by the plug heater 12.
Is heated so that the metal can be melted by heat conduction from the PEG 15 to generate the molten metal 3.

A heat insulating wall of glass wool is formed on the outer periphery of the melting tank 2. A motor valve 5 is arranged in the connecting pipeline 4 connected to the dissolution tank 2, and an end portion of the connecting pipeline 4 is connected to a hermetic pressurizing device 6, and the hermetic pressurizing device 6 has A flow switch 16 is provided on the upper surface of the pressurizing chamber S.
And a thermocouple 17 are vertically provided, and an air pipe 8 is connected to the pressurizing chamber S from the outside in a communicating manner. Furthermore, the closed pressurizing device 6 is connected to the hot water supply pipe 1 toward the outside.
0 is connected, the tip of the hot water supply pipe 10 is extended so as to face the receiving mold 11 installed on the frame base 19, and receives a fixed amount of the molten metal 3 supplied and conveyed from the hot water supply pipe 10. The ingot 20 can be obtained by putting it in the mold 11.

The connecting conduit 4 and the closed pressurizing device 6
The outer circumference of the hot water supply pipe 10 and the outer circumference of the hot water supply pipe 10 are insulated with glass wool, and the pipe heaters 18 are wound at appropriate intervals so that the pipe heater 18 can prevent the molten metal 3 from being cooled well. The motor valve 5 is for transferring the molten metal 3 in the melting tank 2 into the closed pressurizing device 6, and the transfer amount is the pressurizing chamber S.
The motor valve 5 is controlled as determined through the flow switch 16 provided in the.

An air pressure control device 7 as shown in FIG. 3 is connected to an air pipe 8 for introducing pressurized air into the closed pressurization device 6, and the air pressure control device 7 is the compressor. 9 and the pressure chamber S in the closed pressurizing device 6
A control valve 23 is arranged in the air pipeline 8 connecting the
Further, a pressure valve 24 and exhaust valves 25, 26 are arranged in parallel, and a pressure sensor 21 is connected to the pressure chamber S to feed back the pressure in the pressure chamber S. It is configured to communicate to the controller 22,
The controller 22 controls the output of the control valve 23 based on the pressure signal from the pressure sensor 21, and the controller 22 has a set pattern including a time-pressure relationship diagram as shown in FIG. It is stored in memory, and the controller 22 controls the output of the control valve 23 based on the setting pattern of FIG. Therefore, the pressurized air based on the setting pattern of FIG. 4 is introduced into the pressurizing chamber S via the air pressure control device 7, and the inside of the pressurizing chamber S is changed to that of FIG.
The pressure is controlled in accordance with the setting pattern of 1., and by this pressure control, a fixed amount of the molten metal 3 is conveyed and supplied to the receiving mold 11 side through the hot water supply pipe 10.

As described above, by controlling the air pressure of the air pressure control device 7, it is possible to reliably and satisfactorily cut out the molten metal 3 from the pressurizing chamber S, and by changing the set pattern in the controller 22, the molten metal 3 can be cut. The amount of cutting out can be changed appropriately.

[0010]

According to the molten metal cutting apparatus of the present invention, the molten metal in the melting tank is introduced into the pressurizing chamber, and pressurized air is introduced into the pressurizing chamber from the air pressure control device to obtain the pressure in the pressurizing chamber. The amount of molten metal is controlled to flow out from the pressurizing chamber by controlling the pressurizing air to the outside, and the air pressure control device controls the pressurizing air to reliably and accurately measure The molten metal can be cut out by flowing out the molten metal to the outside.

Further, the molten metal cutting device includes a melting tank for forming molten metal therein, a closed pressurizing device which forms a closed pressure chamber, and the molten metal in the melting tank is closed and added. A motor valve for transporting into the pressurizing chamber of the pressure device,
An air pressure control device that is connected to the closed pressurizing device and can control the output of the control valve by control based on a setting pattern to put pressurized air into the pressurizing chamber and control the pressure in the pressurizing chamber according to the setting pattern. Also, by mainly configuring the hot water supply pipe connected to the closed pressurizing device to let the molten metal flow out to the outside, the molten metal generated in the melting tank is reliably applied to the closed pressurizing device via the motor valve. The pressure inside the pressure chamber can be satisfactorily controlled by feeding it into the pressure chamber of the closed pressure device through the air pressure controller based on a set pattern into the pressure chamber of the closed pressure device. By control, a certain amount of molten metal can be reliably cut out from the pressurizing chamber to the outside via the hot water supply pipe.Because there are few moving parts such as pistons as in the past, the mechanism is simplified and the capital investment is reduced. So it can be, and has the effect of equipment degradation may excellent molten metal cut device to reduce durability.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a molten metal cutting device.

FIG. 2 is an arrangement configuration diagram showing a specific example of a molten metal cutting device.

FIG. 3 is a layout view of constituent members of the air pressure control device.

FIG. 4 is a diagram showing a setting pattern of control in the controller.

FIG. 5 is a schematic configuration diagram of a conventional molten metal cutting device.

[Explanation of symbols]

 1 Molten metal cutting device 2 Melting tank 3 Molten metal 4 Connection pipe 5 Motor valve 6 Closed pressurizing device 7 Air pressure control device 8 Air pipe line 9 Compressor 10 Hot water supply pipe 11 Receiving type 12 Plug heater 13, 17 Thermocouple 16 Flow Switch 21 Pressure sensor 22 Controller 23 Control valve S Pressurization chamber

Claims (2)

[Claims] 1. A molten metal in a melting tank is introduced into a pressure chamber, pressurized air is introduced into the pressure chamber from an air pressure controller, and the pressure in the pressure chamber is controlled by the pressurized air. A molten metal cutting device configured to flow out a fixed amount of molten metal from the pressurizing chamber to the outside. 2. A melting tank for forming molten metal therein, a closed pressurizing device which forms a closed pressure chamber, and a pressurizing chamber of the closed pressurizing molten metal in the melting tank. Connected to the hermetic pressurizing device and a motor valve to convey to
Connected to the air-pressure control device that can control the pressure in the pressurizing chamber according to the set pattern by changing the output of the control valve by the control based on the set pattern and injecting pressurized air into the pressurizing chamber, and the closed pressurizing device. 2. A hot water supply pipe which is made to flow out the molten metal to the outside is mainly configured.
The molten metal cutting device described in 1.