JP2501722Y2 - melting furnace - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is directed to an aluminum-based metal ingot (hereinafter, referred to as
The present invention relates to a structure of a melting furnace suitable for use in an instant melting device for an aluminum ingot).

[Prior Art] Machines for melting aluminum-based metal by the tie casting method,
There is an instantaneous melting device as a device that continuously and quickly melts the aluminum ingot, raises the temperature of the molten metal to an appropriate temperature, and discharges the molten metal when forming it by casting as a member of electric equipment. The melting furnace used in the apparatus will be described with reference to FIG.

FIG. 2 shows the entire instantaneous melting apparatus. In the figure, reference numeral 1 is a cold material insertion guide for guiding an aluminum ingot (hereinafter referred to as a cold material) 2 as a material into the melting furnace 3 in an upright state. The molten metal melted in the melting furnace 3 is prevented from scattering outside. The melting furnace 3 is made of a refractory material and has a hollow cylindrical shape with a bottom that stands upright. The furnace body 31 is capable of accommodating the cold material 2 in an upright state, and a furnace body that heats the cold material from its surface to melt it.
It comprises an induction coil 32 provided on the outer periphery of 31 and an outlet 33 opened in the bottom wall of the furnace body 31. Reference numeral 4 denotes a temperature raising furnace arranged coaxially below the melting furnace 3, which is made of a refractory material and has an upright hollow cylindrical furnace body 41 and an outer periphery of the furnace body 41 for raising the temperature of the molten metal to an appropriate temperature. It comprises an induction coil 42 provided and an outlet 43 opened in the bottom wall of the furnace body 41. Reference numeral 5 denotes a hollow tubular hot water outlet pipe which surrounds the outlet 43 and extends downward and communicates with the temperature raising furnace 4, and a hot water outlet 51 is provided below the hollow hot water outlet pipe 5. Reference numeral 6 denotes an outer circumference of the hot water outlet pipe 5, which is an electromagnetic pump disposed above the hot water outlet 51, and adjustably discharges the molten metal from the hot spring outlet 51.

Next, the operation of the entire instantaneous melting device will be described.

The cold material 2 sent into the melting furnace 3 in an upright state by the guide of the cold material insertion guide 1 is heated by the action of the induction coil 32 and is melted from its surface into a molten metal, and this molten metal is discharged from the outflow port 33. It flows out to the temperature raising furnace 4, further passes through the outlet 43, and flows into the tap pipe 5. Here, the electromagnetic pump 6 is adjusted so that the molten metal does not flow out from the tap hole 51,
When the induction coil 42 is energized, the molten metal is pooled in the temperature raising furnace 4 and kept at an appropriate temperature. Then, the electromagnetic pump 6 is adjusted to discharge an appropriate amount of molten metal from the outlet 51 to a die cast machine (not shown) or the like.

By the way, in the melting furnace 3, when the operation of the induction coil 32 is stopped, the molten metal remaining in the furnace body 31 is discharged from the outlet.
It solidifies near 33 and blocks the outlet 33. Next, when the induction coil 32 is operated again, the melting of the cooling material 2 is performed before the melting of the mass, so that the newly melted molten metal cannot immediately flow out from the outflow port 33. The molten metal scatters in the furnace body 31, and adheres to the inner wall of the upper part of the furnace body 31 having a low temperature to be solidified. Since the work of melting the cold material is an intermittent work, the induction coil 32 is repeatedly stopped and actuated, and the mass produced on the inner wall of the upper part of the furnace body 31 grows according to this repetition, and finally the cold material insertion guide 1 It prevents the new cold material that has been inserted from coming down to the furnace body 31. Therefore, conventionally, when the lump becomes large, the furnace body is cut in the transverse direction, the lump is removed, and the cut portion is bonded again.

[Problems to be solved by the device]

However, in the conventional method described above, the furnace body has to be cut and adhered each time the work for removing the lumps is performed,
There was a problem that work efficiency was poor, and there was also a problem that the durability of the furnace body deteriorated due to repeated cutting and bonding.

The present invention was made in order to solve the above problems, and an object thereof is to provide a melting furnace in which the work of removing lumps can be easily performed and the durability of the furnace body does not cause any problem.

[Means for Solving the Problems] In order to achieve the above object, in the melting furnace of the present invention, the furnace body is preliminarily divided in the transverse direction at the upper part, and the head of the furnace body is placed on the furnace body. An upper pressing member having a hole smaller than the outside diameter of the head and larger than the head opening is covered in the center, and a hole smaller than the outside diameter of the bottom of the furnace body and larger than the outlet opened in the bottom is centered immediately below the furnace body. The lower pressing member is provided, and the upper pressing member and the lower pressing member are connected by a connecting rod so that the pressing members can be pressed and released.

[Operation] In the above configuration, the cold material is melted in the furnace body of the melting furnace as in the conventional case, and the inner wall of the upper part of the furnace body is solidified.
Then, with the intermittent operation of the melting furnace, this lump becomes large, and if there is a problem in the supply of the cold material into the furnace body,
Discontinue the melting work, loosen the connecting rod, release the pressure between the upper pressing member and the lower pressing member, divide the furnace body at the previously cut part, remove the lump, and integrate the furnace body again Then, the upper holding member and the lower holding member are connected by the connecting rod so as to press each other.

[Embodiment] Next, an embodiment of the present invention will be described with reference to FIG. In FIG. 1, those having the same symbols as those of the melting furnace shown in FIG. 2 have the same structure as that of FIG.

In FIG. 1, 71 is a furnace body, which is the furnace body of the melting furnace 4 shown in FIG.
A structure equivalent to 41 is divided in the transverse direction at a predetermined position above it. Reference numeral 8 denotes an upper pressing member having a hole 81 in the center which is smaller than the outer diameter of the head of the furnace body 71 and larger than the opening of the head, and is covered on the furnace body 71 so that the hole 81 is coaxial with the furnace body 71. There is. Reference numeral 9 is a lower pressing member having a hole 91 in the center which is smaller than the outer diameter of the bottom of the furnace body 71 and larger than the outlet 33.
Is arranged immediately below the furnace body 71 so as to be coaxial with the furnace body 71. Reference numeral 10 denotes a connecting rod that connects the upper pressing member 8 and the lower pressing member 9. Two connecting rods are provided on the outer periphery of the furnace body 71 in parallel with the shaft and symmetrically with respect to the shaft, and the upper pressing member 8 and the lower pressing member 9 are released. Pressing is possible. The melting furnace 7 shown in FIG. 1 is applied to an instant melting device such as that shown in FIG.

In the above configuration, when the melting of the cooling material proceeds in the furnace body 71 as in the conventional case, the solidification occurs on the inner wall of the upper part of the furnace body 71 with the progress thereof. And this lump becomes large, and the furnace body of cold material
When the supply to the inside of 71 is interrupted, the melting work is stopped, the connecting rod 10 is loosened, the pressure between the upper pressing member 8 and the lower pressing member 9 is released, and the furnace body 71 is cut in advance. Then, the furnace body 71 is integrated again, and the upper pressing member 8 and the lower pressing member 9 are connected to each other by pressing them with each other.

Although the upper holding member 8 and the lower holding member 9 are connected by the two connecting rods 10 in this embodiment, they may be connected by three or more connecting rods.

[Effects of the Invention] As described above, in the melting furnace of the present invention, the furnace body is cut and divided in advance in the transverse direction, so that the conventional work of removing the lumps in the melting furnace is performed. To
There is no need to cut the furnace body, and since the divided furnace bodies are pressed by the connecting rods via the pressing member, a gap is created in the cut part and the molten metal leaks from there. In addition, since it is not necessary to bond the cut portions, it is possible to easily remove the lumps generated in the furnace body and to improve the durability of the furnace body.

[Brief description of drawings]

FIG. 1 is a longitudinal side view showing an embodiment of the present invention, and FIG.
The figure is a vertical sectional side view of an instantaneous melting apparatus using a conventional melting furnace. 7 ... Melting furnace, 8 ... Upper holding member 9 ... Lower holding member 10 ... Connecting rod, 32 ... Induction coil 33 ... Outflow port, 71 ... Furnace body 81 ... Hole, 91 ... Hole

Claims (1)

(57) [Scope of utility model registration request] 1. A melting furnace comprising a hollow cylindrical furnace body with a bottom, an induction coil provided on the outer periphery of the furnace body, and an outlet opening formed in a bottom wall of the furnace body, Is divided in a transverse direction at a predetermined position on the upper portion thereof, and an upper pressing member having a hole in the center which is smaller than the outer diameter of the head of the furnace body and larger than the opening of the head is coaxial with the furnace body. As described above, the lower pressing member having a hole smaller than the outer diameter of the bottom of the furnace body and larger than the outlet is placed over the furnace body so that the hole is coaxial with the furnace body. A plurality of connecting rods that are arranged directly below the upper pressing member and the lower pressing member and that connect the upper pressing member and the lower pressing member to each other so as to press and release the upper pressing member and the lower pressing member. Melting furnace to do.