JPS595486Y2 - holding furnace - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a holding furnace configured to immediately recover die-cast return material and remelt it while it still retains retained heat.

Die casting, in which a molded product is obtained by melting aluminum alloy, zinc alloy, etc., and press-fitting it into a mold, has accurate product dimensions, almost no finishing is required, and has excellent mechanical properties, making it suitable for mass production.

On the other hand, the products that are mass-produced from the machine contain a considerable amount of defective products and returned materials, and these returned materials are sorted immediately after exiting the machine and sent to the melting furnace again to be remelted. However, the return material, which had a retained heat of around 300° C. during sorting, cools down to almost room temperature when remelted, and the amount of heat required for remelting is the same as for the initial melting.

From this point of view, the present invention is designed to immediately transport the return material, which still retains heat of around 300°C after coming out of the machine and has been inspected, to a holding furnace, where it is poured with molten metal and melted, and only a small amount of it is used. The feature is that the amount of heat required to heat the return material from room temperature to around 300°C is saved when remelting the return material.

The present invention will be described in detail below based on the drawings. 1 is a holding furnace body, 2 is a holding tank formed with a single layer of ceramic fiber 3 on the inner surface, and 4 is the upper part of the holding tank 2 except for the outlet 6. A canopy 5 covering the opening is a radiant tube burner attached to the inside of the canopy 4 to heat the molten metal in the holding tank 2 with radiant heat.

7 is the holding tank 2 through the opening 12 of the inclined chamber floor 8.
Next to the bath room, above is the lower part where the return material is introduced.
A molten metal injection port 13 is provided, and a heating wall 14 continuing to the chamber floor 8 is provided on the side surface.

9 is a heating chamber which heats the room floor 8 and the heating chamber 14 from the back side and has a combustion gas outlet 15 in a part of the bath room 7, and 10 is a heating burner attached to this heating chamber 9. .

The holding furnace according to the present invention has the above configuration and is installed as close to the machine as possible.

The returned material generated after sorting and inspection is immediately carried onto the bathing chamber 7 by a conveyor 16 or the like, and is thrown into the bathing chamber 7 from the input lower'.

The input return material is poured with molten metal from the molten metal injection port 13, and at the same time, it is heated from the heating chamber 9 side via combustion gas, the chamber floor 8, and the heating chamber 14, and is melted and becomes molten metal.
The liquid then flows down from the chamber floor 8 through the opening 12 into the holding tank 2.

As described above, in this invention, the return material, which still retains heat of around 300°C, is melted by pouring molten metal on it, so it takes less heat and time to melt than when the return material, which has been cooled to room temperature, is melted again. This has the effect of reducing oxidation loss and saving fuel costs.

In addition, the present invention is provided with a heating chamber 9 for supplementary heating of the return material in the bath room 7, so when there is a large amount of return material or when the temperature of the return material is relatively low,
It is very effective in cases where it dissolves in a short period of time.

[Brief explanation of drawings]

The figure is a sectional view showing an embodiment of a holding furnace according to the present invention. 1... Holding furnace main body, 2... Holding chamber, 4
...Canopy, 5...Radiant tube burner, 7...Bath room, 8...Heating chamber, 9...Heating chamber , 10... Heating burner, 13... Molten metal inlet.

Claims (1)

[Scope of utility model registration request] An inlet for notarne material and an inlet for molten metal are provided at the top.
A part of the bath room has a sloping floor facing the holding tank, and a heating chamber is constructed behind the heating wall that forms part of the bath room, and a heating burner is installed in this heating chamber. A holding furnace that can be installed and drilled.