JPS63251785A - Tapping device for vacuum melting furnace - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a vacuum tank in which an induction melting furnace is installed in a tapping device for a vacuum melting furnace, and a vacuum gate valve inserted between the vacuum tank and a mold preparation chamber. It relates to something that can be made smaller.

[Conventional technology]

A conventional example of a tapping device for a vacuum melting furnace will be explained based on FIGS. 2 and 3. In these figures, a closed vacuum tank 1 and a mold preparation chamber 2 are connected via a vacuum gate valve 3, and inside the vacuum tank 1 is a tilting pouring type crucible induction melting furnace 4 and a melting furnace. A tundish L5b for receiving the molten metal poured out from the tundish 5 and a mold 6 for pouring the metal through the tundish 5 are installed. After closing the door 7 of the mold preparation room 2, the vacuum tank 1 and the mold preparation room 2 were evacuated as shown by the arrow, and the melted material was melted by induction heating in a vacuum atmosphere and stored in the melting furnace 4. The molten metal or the molten metal being kept warm is poured into the mold 6 by tilting the melting furnace 4 as shown by the dotted line. The mold 6 is a base plate 8
is placed on a moving means 9 such as a roller conveyor via
After pouring, the mold 6 together with the tundish 5 is pulled out by the moving means 9 as shown by the dotted line by opening the vacuum gate valve 3 and the door 7.

[Problems that the invention attempts to solve]

In the above structure, the vacuum tank 1 is enlarged in order to make the melting furnace 4 tiltable and accommodate the mold 6 and the tundish 5, and the vacuum gate valve 3 is also enlarged because it is necessary to pass the mold 6 together with the tundish 5. Both had the disadvantage of being expensive.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide a tapping device for a vacuum melting furnace in which a vacuum tank and a vacuum gate valve can be downsized.

[Means for solving problems]

In order to achieve the above object, the present invention provides a vacuum tank 1
A mold preparation chamber 12 is disposed directly under the mold preparation chamber 12 via a vacuum gate valve 13, and metal can be poured into the mold 6 installed in the mold preparation chamber 12 from the bottom of the melting furnace 14 in the vacuum tank 11. It is something.

[Effect]

Since the melting furnace 14 can be poured from the bottom so that no tilting is required and the mold 6 is installed in the mold preparation chamber 12, the vacuum tank 11 can be downsized, and the vacuum gate valve 13 can also be connected to the mold 6. Since there is no need to pass through it, it can be made smaller.

〔Example〕

FIG. 1 shows an embodiment of the present invention, and parts indicated by the same reference numerals as in FIGS. 2 and 3 are the same parts. In this figure, a mold preparation chamber 12 is disposed directly below a vacuum tank 11 via a vacuum gate valve 13, and this mold preparation chamber 12
A mold 6 and a crucible-shaped induction melting furnace 14 are installed inside the vacuum tank 11 and the vacuum tank 11, respectively. A downward pouring spout 14α is provided at the bottom of the melting furnace 14, and an on-off valve 15 for opening and closing the pouring spout 14α from the outside is provided on the lower side of the melting furnace 14 so as to be movable in the horizontal direction.

The vacuum tank 11 and the mold preparation chamber 12 are the mold preparation chamber 12.
After closing the door 17 of the melting furnace 1, it is evacuated as shown by the arrow and melted by induction heating in a vacuum atmosphere.
The molten metal stored in the mold 4 or the molten metal being kept warm can be poured into the mold 6 by opening the vacuum gate valve 13 and operating the on-off valve 15 to open the pouring port 14α.

The mold 6 is placed on a moving means 19 such as a roller conveyor via a base plate 8, and after pouring the mold 6, the door 17 is opened and the moving means 19 pulls the mold 6 out.

According to the embodiment described above, the melting furnace 14 can be poured from the bottom, eliminating the need for tilting, and the mold 6 is installed in the mold preparation chamber 12. Therefore, not only can the vacuum tank 11 be made smaller, but also the vacuum tank 11 can be made smaller. The vacuum pump can also be made smaller. Further, since the vacuum gate valve 13 does not need to be passed through when drawing out the mold 6, it can be made smaller. Furthermore, pouring port 1
If the mold 6 is installed directly under the mold 4α, the tundish 5 described in the conventional example can be made unnecessary, and the vacuum tank 11, the vacuum pump, and the vacuum gate valve 13 can be made smaller, and there is a great saving effect.

〔Effect of the invention〕

According to this invention, in a tapping device for a vacuum melting furnace, a mold preparation chamber is provided directly below a vacuum tank via a vacuum gate valve, and the bottom of the melting furnace in the vacuum tank is placed in a mold installed in the mold preparation chamber. Since the molten metal can be poured from the inside, the vacuum tank, the vacuum gate valve, etc. can be made smaller and cheaper.

[Brief explanation of drawings]

The figure is a schematic configuration diagram of a conventional example, and FIG. 3 is a schematic configuration diagram seen from the side of FIG. 2. 6... Mold, 11... Vacuum tank, 12... Mold preparation room, 13... Vacuum gate valve, 14... Melting furnace. ! ", I. As an agent (L-LL mouth Δ゛ Go Figure 2)

Claims (1)

[Claims] 1) A vacuum tank in which an induction melting furnace is installed inside and a mold preparation chamber are connected via a vacuum gate valve, and the mold preparation chamber is arranged directly under the vacuum tank, and the mold preparation chamber is installed inside the mold preparation chamber. A tapping device for a vacuum melting furnace, characterized in that melt can be poured into the mold from the bottom of the melting furnace.