JPH0541350B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a molten metal supply system used in a casting line.

Conventional technology and its problems When pouring metal into a casting line from a cupola etc.
As shown in Figure 2, the general method is as follows: cupola 1 → holding furnace 2 → ladle 3 → casting line 5, but in the case of automatic pouring, the flow is cupola 1 → holding furnace 2 → pouring furnace 4 → It is called casting line 5.

Here, the role of the holding furnace 2 is to adjust the composition of the molten metal coming from the cupola 1, to raise the temperature of the molten metal coming from the cupola 1, and to act as a cushion in case of line troubles due to the cupola 1 not being able to stop immediately. The role of furnace 4 is to pour a fixed amount of metal into the line, prevent the temperature of the molten metal from dropping, and save resources by making pouring into the mold unmanned.

Problems to be Solved by the Invention In the above-mentioned conventional pouring system, while the molten metal is transferred from the cupola to the mold on the casting line, there are many changes to the furnace, ladle, etc., and there is a problem of temperature changes in the molten metal during that time. At the same time, there were problems such as the large number of people required to operate the pouring system, which hindered automation.

It is an object of the present invention to solve the above-mentioned problems and provide a pouring system that can suppress temperature changes in molten metal and can be automated.

Structure of the Invention The pouring system of the present invention supplies and holds molten metal from a cupola to a pouring furnace which has a sealing means on the openable/closable part of the upper part of the hot water storage chamber of the pouring furnace body, and simultaneously supplies the melt to the pouring furnace. It is characterized by being able to supply molten metal directly from the mold to the mold on the casting line.

Embodiment As shown in FIG. 1, the molten metal taken out from the cupola 1 is immediately transferred to the pouring furnace 4 after the slag is removed.
is supplied to Then, the pouring furnace 4 is moved onto the casting line 5, and the pouring furnace 4 is poured into molds etc. by pressurized pouring.

The pouring furnace 4 needs to also function as a conventional holding furnace, and for this purpose, the pouring furnace 4 is required to be large-sized and to be able to precisely control the amount of poured metal like a small pouring furnace. For this purpose, a sealing means is used in the pouring furnace 4 to prevent air leakage.

FIG. 3 shows a pressurized pouring furnace used in the pouring system of the present invention, and the furnace body 10, which is made up of a frame and a refractory material, has a receiving port 11 for receiving molten metal from a cupola, and a hot water storage chamber. 12, a hot water receiving passage 13 communicating from the hot water receiving port 11 to the lower end of the hot water storage chamber 12,
It has a hot water tap passage 15 communicating from the lower part of the hot water storage chamber 12 to the hot water tap chamber 14, and a hot water tap port 16.

The upper end opening of the molten metal inlet 11 is closed by a molten metal inlet lid 17 made of a heat insulating material so as to be openable and closable. In addition, the upper opening of the hot water storage chamber 12 is provided with a lid 18 for the hot water storage chamber.
It can be opened and closed freely.

Further, the upper opening of the hot water tap chamber 14 is closed by a lid 19 for the hot water tap chamber so as to be openable and closable. An annular plate 20 is attached to the outer periphery of the lower end of the lid 18 for the hot water storage chamber, and an annular plate 21 is fixed to the upper surface of the furnace body 1 so as to surround the hot water storage chamber 12. Boards 20 and 2
1 and 1 face each other when the hot water storage chamber 12 is closed with the lid 18 placed in the predetermined position shown. The inner diameter of the upper plate 20 is the same as that of the lower plate 21.
The inner circumferential portion of the upper plate 20 projects slightly toward the hot water storage chamber 12.

Furthermore, an O-ring 23 is fitted into the inner periphery of the lower plate 21, so that when the lid 18 is closed, the upper plate 21
The protruding part of the O-ring 23 presses the O-ring from the upper side and comes into close contact with the O-ring, and the outer periphery of the O-ring contacts the inner periphery of the lower plate 21, so that both the upper and lower plates 20, 2
It is designed to seal the gap between 1.

With this configuration, even if there is a crack or the like in the insulation material 24 and the lid 18 is closed, the air in the hot water storage chamber passes through the insulation material 24 along the path shown by arrow K, and the upper part of the insulation material 24 and the lid Even if it passes through the gap between the O-ring 23 and the iron plate 25,
The sealing effect with 0 and 21 prevents it from being released outside the furnace.

This prevents air leakage within the furnace.

Note that 26 indicates the furnace body 1 at the outer periphery of the hot water storage chamber 12.
It is a cylindrical heat shield plate embedded in a fireproof material, and the upper end of this heat shield plate 26 is in close contact with the lower end of the lower plate 21 to enhance the effect of preventing air leakage from here. It improves the insulation effect.

Note that this pouring furnace supplies gas at a predetermined pressure to the hot water storage chamber 1 through a pressurizing hole (not shown) provided in the lid 18.
2 and pressurizes the molten metal, the molten metal can be pushed up into the tapping chamber 14, and a predetermined amount of the molten metal can be poured into the mold from the tap 16.
As is clear from FIG. 3, the upper end surface 11a forming the inlet 11 is located above the upper end surface 30a of the side wall 30 forming the tapping chamber 14.
It is possible to simultaneously supply the molten metal from the cupola 1 to the pouring furnace 4 and to discharge the molten metal from the pouring furnace 4 to the casting line 5.

As described above, the upper openings of the pouring furnace 4 used in the present invention are sealed in a heat-insulating manner, so that the temperature of the molten metal in the pouring furnace is prevented from decreasing, and air leakage is prevented. Even with a large pouring furnace, the amount of melted metal can be precisely controlled, making it possible for this pouring furnace to double as a conventional holding furnace.

Effects of the Invention As described in detail above, the present invention provides a hot water pouring system with a sealing means having a first plate, a second plate, and an O-ring, thereby improving the sealing state in the hot water storage chamber. Even if the volume of the hot water storage chamber is increased, the amount of air leakage in the hot water storage chamber when discharging the molten metal in the hot water storage chamber can be reduced, making it possible to increase the internal volume of the pouring furnace, and thus It is now possible to make the pouring furnace also function as a holding furnace, and by using a large pouring furnace to precisely control the amount of poured metal, and also having the function of a conventional holding furnace, it is possible to It becomes possible to directly feed and hold the molten metal into this pouring furnace. Therefore, the number of times the molten metal must be transferred to another furnace from the cupola to the casting line is reduced, preventing the temperature of the molten metal from dropping, enabling high-quality casting, and eliminating the need for a holding furnace. The system can be made cheaper. Further, according to the present invention, since the upper end surface of the inlet forming the inlet is located above the upper end surface of the tap forming the tap for discharging the molten metal in the hot water storage section to the casting line, the pouring from the cupola is possible. It is possible to simultaneously supply molten metal to the furnace and discharge the molten metal from the pouring furnace to the casting line.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a pouring system of the present invention, FIG. 2 is a diagram showing a conventional pouring system, and FIG. 3 is a sectional view showing an example of a pouring furnace used in the embodiment of FIG. be. 1... Cupora, 4... Pouring furnace, 5... Casting line, 12... Hot water storage room, 17, 18... Lid, 2
0, 21...Annular plate, 23...O ring, 26
...Shiyahei board.

Claims (1)

[Claims] 1. The hot water storage chamber 12, which is formed by covering the opening of the hot water storage container with an open top with a hot water storage chamber lid 18 and which temporarily holds molten metal, has an internal pressure of the hot water storage chamber and an external pressure outside the hot water storage chamber. The sealing means is provided on the upper surface of the periphery of the opening and has a circular hole in the center.
a plate 21, a second plate 20 facing the first plate and provided on the lid side for the hot water storage chamber, and a second plate 20 that is in contact with the first plate and the second plate when the hot water storage chamber lid is closed. A hot water inlet upper end surface 11a that forms a hot water inlet 11 which is a supply port for supplying molten metal from the cupola 1 to the hot water storage chamber and an O-ring that seals the hot water storage chamber.
The molten metal is supplied from the cupola through the inlet to a pouring furnace configured to be located above the upper end surface 30a of the outlet forming the outlet 16 for discharging the molten metal in the molten metal storage chamber to the casting line. By holding the molten metal in the hot water storage chamber and pressurizing the inside of the hot water storage chamber, the molten metal can be simultaneously supplied from the pouring furnace directly to the mold on the casting line through the tap outlet. Molten metal supply system.