JP2826862B2 - Prevention device for outflow of molten metal during power outage of aluminum ingot rapid melting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rapid melting apparatus for ingots of aluminum or aluminum alloy (hereinafter referred to as aluminum-based metal), and more specifically, to die casting of molten aluminum-based metal. When molding by casting as a member of a machine or electrical equipment, etc., immediately before a pouring slot of a die of an individual die casting machine or a pouring port of other casting equipment, an aluminum-based metal ingot (hereinafter abbreviated as an aluminum ingot). About 1 to 2 are sequentially inserted and directly melted by induction heating, etc., so-called cold material insertion melting method, sequentially melted from the surface, flowed down as molten droplets into a heating furnace, heated the molten metal, and further poured. In a melting apparatus of the type of pouring by flowing down into the furnace, the molten metal is held in the furnace against the gravity by the electromagnetic pump at the time of temperature rise, It is applied to the rapid dissolution apparatus employing a so-called check electromagnetic pump scheme, to an apparatus for preventing harm caused by molten metal flowing out in the abnormal situation such as a power outage.

[Prior art] As structural members for general machinery, special machinery, vehicles, electric equipment, etc., aluminum has the characteristics of low specific gravity and low melting point, and if it is an alloy, it should have considerable strength. It is widely used as a wrought material or a cast product because it can be made.

Die casting, shell type casting, centrifugal casting, etc. are used in addition to ordinary molds and sand castings as castings. Among them, the die casting method uses a die casting machine (also called a die casting machine) Can be repeatedly cast at a high pressure and at a high speed into a die called a die to produce a precision cast product. ing.

There is no need to maintain a high-temperature operating state for a long time like a melting furnace or a holding furnace that supplies molten metal, as in the melting equipment generally used in many casting machines in a foundry. In order to improve work efficiency and improve safety by eliminating processes such as transporting, storing and pumping out, the inventor of the present invention placed the aluminum ingot on the die slot of each die casting machine and immediately before the pouring port of other casting machines. We have developed various types of rapid melting method for cold materials based on the concept of melting directly to the specified pouring temperature and pouring into the die.

In a melting apparatus of the type in which the molten metal is sequentially melted from the surface of the aluminum ingot by the cold material insertion melting method, and is allowed to flow down into a heating furnace as molten droplets to raise the temperature of the molten metal, and is further allowed to flow down into a pouring furnace to be poured. In a so-called non-return electromagnetic pump type rapid melting apparatus in which the molten metal is held in the furnace against the gravity by an electromagnetic pump when heated, as shown in FIG.
Is melted by induction heating in the melting furnace 22 by an induction coil 22a provided on the outer periphery of the melting furnace 22, and is led to the heating furnace 23 through the outlet 22b as droplets.

The heating step is a non-return electromagnetic pump provided on the outer periphery of the pouring furnace 24 with the molten metal flowing out of the outlet 23b of the heating furnace 23 into the pouring furnace 24.
Heating furnace 23 and pouring furnace 2 against gravity added to the molten metal by 24a
4 and induction heating by an induction coil 23a provided on the outer periphery of the heating furnace 23, and when the temperature is raised to a predetermined temperature, cancel the upward thrust force against the gravity of the electromagnetic pump 24a or further. By applying a downward thrust, the molten metal flows down in the pouring furnace 24, flows out of the tap hole 25, flows down in the pouring gutter 26, and is poured into the die casting machine 27.

[Problems to be Solved by the Invention] However, in the event of a power failure, the non-return electromagnetic pump 24a
Immediately loses its check function, so the heating furnace 23 and pouring furnace 24
Starts flowing from the tap hole 25, flows into the pouring gutter 26, flows into the receiving port of the die casting machine 27 and other parts of the die casting machine, or flows out of the pouring gutter 26 to the outside. They flow and scatter.

At such an unexpected point, a sudden outflow of molten metal,
The structure of the die casting machine 27 may be damaged due to scattering, etc.
A solution was demanded because employees and others who were present at the place could be hurt.

[Means for Solving the Problems] In the present invention, a pouring gutter is made to be able to swing around its supporting point as a rotation axis, and in a normal state, molten metal flows from a pouring port of a pouring furnace toward a die casting machine. Like this, the pouring gutter is tilted against its own weight or spring force using a solenoid, but in the event of a power failure, the solenoid will no longer generate electromagnetic force, so it automatically reverses the normal state. If the check pump is tilted in the opposite direction and the check pump loses its check function due to a power failure, the pouring gutter will be tilted in the opposite direction to normal and the molten metal will flow out to a die casting machine, etc. Instead, it is directed to a slaughterhouse to prevent the occurrence of unforeseen disasters.

The molten metal outflow prevention device at the time of a power outage according to the present invention is a single hollow cylindrical heating / pouring furnace in which a heating furnace and a pouring furnace are united. Of course, the present invention can also be applied to a rapid melting apparatus of a type performed by an electric resistance heating device arranged inside a furnace.

[Operation] In the present invention, an electromagnetic pump for pouring molten metal into a die of a casting apparatus such as a die casting machine is arranged on the outer periphery of the pouring furnace, and the electromagnetic pump is operated to cause the molten metal to flow out by gravity. The molten metal is stored in a heating furnace and a pouring furnace to increase the temperature to a predetermined temperature.

During this temperature increase, the solenoid of the pouring gutter is also energized, so that the pouring gutter is tilted so that it can be poured into a die casting machine or the like. The check thrust of the pump is released or a further downward thrust is applied to accelerate the molten metal, and the molten metal is poured into a die casting machine or the like.

Also, if there is a power failure during the temperature raising step, the solenoid will not be energized, so the pouring gutter will swing by the spring force or by its own weight and will be tilted in the direction opposite to the pouring state to melt the molten metal. Guide to a place suitable for disposal of residual hot water, such as a noro dumping site, to prevent the occurrence of accidents.

[Embodiment] A preferred embodiment of a molten metal outflow prevention device at the time of a power failure according to the present invention will be described with reference to FIGS. 1 and 2. FIG. In addition,
In these figures, those given the same reference numerals as those in FIG. 3 indicate the same configurations as those in FIG.

In these figures, a transverse axis Y perpendicular to the longitudinal axis XX of a rectangular pouring gutter 1 having a U-shaped cross section.
Almost along -Y, bosses 2 protrude from both outer surfaces of the pouring gutter 1, and the pouring gutter 1 is fixed to the frame 3 of the rapid melting apparatus and near the lower end of the hanging support arm 4 via the bearing 5. Supported. A boss 6 projects parallel to the boss 2 from both outer surfaces between an end of the pouring gutter 1 on the side farther from the die casting machine 27 and the boss 2, and a frame 8 having a U-shaped cross section through a bearing 7.
The frame 8 is connected via a rod 12 to a core 10 of a solenoid 9 which is fixed to the frame 3 and hangs down. On the other hand, a casting machine for pouring gutter 1
Boss from both outer surfaces between the end closer to 27 and the boss 2
13 projects in parallel with the boss 2, and a frame 15 having a U-shaped cross section is pivotally mounted via a bearing 14. One end of the frame 15 is attached to the other end of a tension spring 16 mounted on the frame 3. Are linked.

Next, the operation of this apparatus will be described. During the normal operation of the rapid melting apparatus, the coil 11 of the solenoid 9 is energized and the core 10 is pulled up as shown in FIG. The right side of the frame 8 is pulled up via a rod 12 against a tension spring 16 as shown by a solid line, and the pouring gutter 1 swings around a transverse axis Y-Y in FIG. It tilts down to a position where it can be poured. When a power failure occurs, the power supply to the coil 11 of the solenoid 9 is also cut off, so that the force of the tension spring 16 prevails, and the pouring gutter 1 is inclined downward to the right as shown by the imaginary line in FIG. The molten metal that should have flowed out due to the pump 24a resting is caused to flow to the remaining molten metal dumping site 17 so as to prevent accidental outflow of molten metal.

The heating furnace and the pouring furnace are combined into a single hollow cylindrical heating and pouring furnace, and the temperature of the molten metal is raised by electric resistance heating disposed inside the heating and pouring furnace. Even in the case of a rapid melting apparatus of the type performed by the apparatus, the mechanism for changing the inclination direction of the pouring gutter 1 is exactly the same as in the above-mentioned case, so that the illustration and description are omitted.

In the above embodiment, the pouring gutter 1 is connected to the tension spring 16.
Is tilted to the pouring position by the solenoid 9 against the pulling force of the above, but the tension spring is not used. The pouring gutter 1 may be held at a normal position by using a solenoid to tilt to a posture at the time of a power failure due to gravity in a normal state.

[Effects of the Invention] As can be understood from the above description, a so-called cold material insertion melting is performed in which an aluminum ingot is inserted and melted immediately before a die slot of a die casting machine. In a rapid melting device that holds the molten metal in a heating / melting furnace that combines both furnaces in a furnace with a non-return electromagnetic pump, the molten metal suddenly stops when the non-return function of the non-return electromagnetic pump stops during a power outage. Outflow to the outside,
The pouring gutter is equipped with a solenoid, and in normal operation, the check electromagnetic pump and the solenoid both perform their original functions, so that the pouring gutter is maintained in a normal pouring position. Since the pouring gutter is tilted in a direction different from the pouring position and the remaining hot water can be safely discarded by stopping the original functions of both solenoids, it is extremely effective in terms of accident prevention and contributes industrially. It is enormous.

[Brief description of the drawings]

FIG. 1 is a side view of a molten metal outflow prevention device according to the present invention, FIG. 2 is a front view in the direction of arrow II in FIG. 1, and FIG. 3 is a sectional side view of a rapid melting device. Symbols in the drawing 1: pouring gutter, 9: solenoid, 16: tension spring, 22: melting furnace, 23: heating furnace, 24: pouring furnace, 24a: non-return electromagnetic pump, 25: tap hole, 27: Die casting machine.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F27B 1/21 F27B 1/21 14/06 14/06 14/18 14/18 (56) References JP-A-1-165727 ( JP, A) Japanese Utility Model Showa 57-81398 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F27B 1 / 04,1 / 21,14 / 06,14 / 18 C22B 9 / 16 B22D 35/00

Claims (4)

(57) [Claims] When a molten metal of an aluminum-based metal containing aluminum and its alloy is poured into a casting machine such as a die casting machine, a small number of aluminum ingots of components corresponding to the molten metal are cooled at a position close to the casting machine. As a rapid melting device by supplying a cold material of an aluminum ingot, which is sequentially supplied as a material, melted and melted, and heated and poured, at least one of the aluminum ingots is received as a unit and melted from its surface to form molten droplets. A melting furnace to flow down, a heating furnace to receive the droplets flowing down from the melting furnace and raise the temperature to a predetermined pouring temperature, and a die casting machine which continuously arranges and raises the molten metal below the heating furnace. And a pouring furnace for pouring into a pouring port of a casting facility such as the above. When the temperature is raised, the heated furnace and the molten metal in the pouring furnace are opposed to gravity by a non-return electromagnetic pump. The molten metal stored in the furnace and heated is flowed down the pouring gutter from the pouring furnace outlet to the molten metal receiving port of the casting machine such as a die casting machine. In the melting apparatus, the pouring gutter is swung so that the inclination directions of both sides with the support point as a fulcrum are reversed, and at the time of a power failure, the inclination direction is automatically reversed from the normal direction, and when the molten metal is not A device for preventing molten metal from flowing out when a power failure occurs in the aluminum ingot rapid melting device due to the stoppage of the function of a non-return electromagnetic pump, characterized by preventing outflow and scattering of water. 2. The molten metal outflow prevention device at the time of a power failure according to claim 1, wherein the heating furnace and the pouring furnace are united to form a single hollow cylindrical heating / pouring furnace. Wherein the temperature rise is performed by an electric resistance heating device disposed inside the temperature rise / pour furnace, wherein the rapid melting of the aluminum ingot is prevented from flowing out in the event of a power failure. 3. The molten metal outflow prevention device at the time of a power failure according to claim 1 or 2, wherein a pouring gutter is inclined so that pouring can be performed against a spring force by an electromagnetic force of a solenoid in a normal state. A molten metal outflow prevention device at the time of a power failure of an aluminum ingot rapid melting device, characterized in that: 4. A molten metal outflow prevention device at the time of a power failure according to claim 1 or 2, wherein the pouring gutter is normally tilted by the electromagnetic force of the solenoid in a direction opposite to the tilting direction due to the weight of the pouring gutter alone. A molten metal outflow prevention device at the time of a power failure of an aluminum ingot rapid melting device, characterized in that the molten metal can be poured.