JPS6038153Y2 - metal melting furnace - Google Patents

Description

[Detailed description of the invention] As shown in Fig. 1, the present invention includes a furnace body in which a combustion flame inlet and a flame exhaust port C are provided in a combustion part a on which a crucible d is suspended. This has been improved so that the thermal energy discharged and dumped from the flame outlet C into the chimney is used to melt the metal material, and the molten metal flows out to the mouth of the crucible.

The above-mentioned furnace body heats the bottom of the crucible d suspended in the combustion section a by heavy oil flame, street gas flame, etc. blown in from the inlet, melts the metal material put into the crucible, and expels the flame. is discharged into the atmosphere from a chimney connected to a flame exhaust port C, and the crucible d is heated by the high-temperature flame blown in from the inlet, so the metal material put into it is The molten metal is heated under harsh heating conditions and tends to generate bubbles in the molten metal, which not only causes casting cavities but also causes disadvantages in the use of thermal energy.

The present invention aims to eliminate such drawbacks of conventional metal melting furnace bodies.

A preferred embodiment of the present invention will be described with reference to FIGS. 2-5.

In the figure, reference numeral 1 denotes the combustion section of a furnace body with an iron crucible or graphite crucible 5 suspended from the upper opening, and this is provided with an inlet 2 for combustion flames and an L-shaped flame exhaust outlet 3. A heavy oil flame generator or gas burner 6 is installed outside and combustion flame is blown into the inside.

The flame exhaust port 3 is an upwardly opened refractory structure 4 protruding from the combustion section 1, and an L-shaped opening surrounding the mouth of the crucible 5 is formed between the opening and the combustion section 1 of the furnace body. The flame evacuation duct structure 7 is overlapped.

The structure 7 is constructed of refractory material, and has an L connected to the rising part of the starting end port 8 that communicates with the flame exhaust port 3 inside.
A flame exhaust path 9 with a shape of A molten metal pool 11 is provided at the bottom between the starting end port 8 and the direction of the flame exhaust port 3 is successively lowered, and a molten metal take-out hole is provided at the lower end of the molten metal pool and opens toward the mouth of the crucible 5. 12 will be provided.

A guide trough 13 is fixed to the outside of the mounting hole 12.

The ceiling of the flame exhaust path 9 forming the ceiling of the molten metal pool 11 is made of wrought roof tiles with high fire resistance.

A fireproof plug 14 is provided at the molten metal outlet 12.

A chimney 15 is provided above the material input/exhaust port 10, and a cap 16 is provided around the lower end.

The metal melting furnace of the above embodiment is used for melting metals with relatively low melting temperatures, such as aluminum and aluminum-based light alloys.
The flame blown into the furnace heats the bottom of the crucible 5 storing the molten metal, enters the flame exhaust path 9 from the flame exhaust port 3 through the starting end port 8, exits from the material input/exhaust port 10, and is sucked into the chimney 15. This heats the wall of the flame exhaust path 9.

When a metal lump material such as an aluminum ingot is fed into the interior from the material input/exhaust port 10 using a metal clamp, it is melted by the exhaust flame passing through the flame exhaust path 9 and the temperature of the road wall of the government road, and this melts into a molten metal pool. 11, and is continued to be heated by radiant heat from the ceiling of the flame exhaust channel 9, and the fireproof plug 14 of the molten metal outlet 12 is heated.
If the molten metal is not provided, it will flow into the crucible 5 through the guide trough 13, and if the fireproof stopper 14 is provided, it will accumulate in the molten metal pool 11 and be heated to an appropriate melting temperature.

When the fireproof plug 14 is applied, the fireproof plug 14 is removed while considering the consumption of the molten metal in the crucible 5 due to pumping out and the molten state of the material, and the molten metal in the molten metal pool 11 is poured into the crucible 5 from the molten metal outlet. .

The present invention has the configuration as exemplified above, and the metal material is not put into the crucible 5 and heated and melted, but the material input port is provided at the end of the flame exhaust channel 9 which is provided surrounding the upper mouth of the crucible 5. Comparison of the flame that is supplied to the flame exhaust channel 9 from the exhaust port 10 and has lost some thermal energy by heating the bottom of the crucible 5 in the combustion section 1, and the wall of the flame exhaust channel 9 heated by the flame. Since it is heated and melted at a moderate temperature, air bubbles are not mixed into the molten metal unlike when a lump of metal material is put into the crucible and melted. Since only the poured molten metal is stored in the tank and there is no need to add lumps of metal material, the molten metal can be pumped up to the bottom at any time and used for casting.

In addition, the bottom of the crucible 5 into which the molten metal is poured from the molten metal outlet 12 is heated as described above and maintains fluidity suitable for casting, but there is almost no chance of air bubbles being mixed into the molten metal. , it can be used for casting good quality castings without porosity, and the exhaust temperature of the combustion part blown in from the blowing port 2 can be used to melt metal, so the exhaust heat energy is extremely advantageous. Furthermore, if the flame exhaust duct structure 7 is of the top-mounted type as shown in the figure, the present invention can be applied to the conventional metal melting furnace illustrated in FIG. .

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional crucible heating type metal melting furnace;
Figures 5 to 5 show embodiments of the present invention, Figure 2 is a perspective view, Figure 3 is a perspective view, and Figure 3 is a perspective view.
The figure is an enlarged side view cut along the line C-C in Figure 2, and Figure 4 is an enlarged side view of Figure 2 C.
FIG. 5 is an enlarged side view cut along line C-C in FIG. 2. 1... Combustion part, 2... Inlet, 3...
...Flame exhaust port, 5... Crucible, 9...
・Flame exhaust path, 10...Material input and exhaust port, 11
... Molten metal reservoir, 12... Molten metal outlet,
15...Chimney.

Claims (1)

[Scope of utility model registration request] In a furnace body in which a combustion flame inlet and a flame exhaust port are provided in a combustion section in which a crucible is hung, a portion of the furnace body that is connected to the flame exhaust port and covers the mouth of the crucible on the upper surface of the furnace body. An L-shaped flame exhaust path is constructed, and the flame exhaust path is provided with a material input port and exhaust port that opens upward at the end, and a flame exhaust port is provided at the bottom between the material input port and the flame exhaust port. 1. A metal melting furnace characterized in that a molten metal reservoir is provided whose mouth is gradually lowered, and a molten metal outlet hole that opens toward the mouth of the crucible is provided at the lower end of the molten metal reservoir.