JPS5940132Y2 - Pressurized automatic pouring device - Google Patents

Description

[Detailed description of the invention] This invention relates to a pressurized automatic pouring device that applies a predetermined gas pressure to the molten metal stored in the furnace body and pours the metal into the mold. This invention relates to an improvement in a tapping trough that is formed in the upper part of one side of a furnace body and has a pouring nozzle for pouring molten metal into a mold.

FIG. 1 shows a tap gutter in a conventional pressurized automatic pouring device of this type, in which molten metal 1 is pushed up by pressurized gas into the tap tap 3a formed at the top of one side of the furnace body 3;
Reference numeral 2 denotes a pouring nozzle attached to the bottom of the tip of the tap trough 3a lined with refractory material, and at the bottom of the pouring nozzle 2, a plurality of molds for receiving molten metal are arranged, although not shown. Needless to say, it is.

Reference numeral 4 denotes a stopper for opening and closing the pouring port 2a of the pouring nozzle 2 from the inside to pour a predetermined amount of molten metal 1 in the tap trough 3a into a mold (not shown); 5 a stopper in the tap trough 3a; Molten metal 1
This is a molten metal level detection sensor for detecting the position of the molten metal level and always maintaining the height of the molten metal level at a predetermined position.

The conventional pressurized automatic pouring device is constructed as described above, and as shown in FIG. Alternatively, the surface of the molten metal 1 pushed up into the tapping gutter 3a by a lifting device such as an electromagnetic pump is always maintained at a predetermined height by controlling the lifting device using the output signal of the molten metal level detection sensor 5 that comes into contact with the molten metal 1. It shows the state in which

When pouring metal into a mold (not shown) that has been transported directly below the pouring nozzle 2, the stopper 4 is raised to open the pouring port 2a. When the level of molten metal 1 in tap tap 3a drops,
The hot water level detection sensor 5 detects this and drives the pushing up device.
Needless to say, the molten metal in the furnace body 3 is pushed up into the tapping trough 3a to be replenished.

Generally, a large amount of molten metal is stored in the furnace body 3 of this type of automatic pouring device, and the storage time thereof is long.

During such casting, an inoculant such as Fe-8i is added to the molten metal 1 in order to prevent the occurrence of chill cracks, but the inoculating effect of this inoculant is usually 15%. In this type of automatic pouring equipment, the storage time of the molten metal in the furnace body 3 is long as described above, so the molten metal inoculated in the ladle is transferred to the furnace body of the automatic pouring equipment. If hot water is supplied at the same time, it will not be possible to pour hot water with sufficient inoculation effect.

Therefore, in the automatic pouring device, a means is used to supply molten metal that is not inoculated into the furnace body 3 and to supply the inoculant to the molten metal 1 in the tapping trough 3a. It becomes "slag" (molten slag) and floats to the surface of the molten metal, and this non-conductive "slag" is interposed between the molten metal level detection sensor 5 and the surface of the molten metal 1. Even when the tip of the surface detection sensor 5 is in contact with the molten metal, there is no slag.
This cannot be detected electrically due to the intervention of
The drawback is that accurate control of the hot water level is difficult.

This idea was made with attention to this point, and the tap water gutter formed at the upper part of one side of the furnace body was divided by a weir into an inoculant inoculation chamber and a hot water level detection chamber, thereby eliminating the above-mentioned drawbacks. That is.

That is, although FIG. 2 shows one embodiment of this invention, the same reference numerals as those of the above-mentioned conventional one (FIG. 1) are used.
Descriptions of the constituent members will be omitted.

Reference numeral 6 denotes a weir that divides the inside of the tapping gutter 3a formed in the upper part of one side of the furnace body 3 into a hot water level detection chamber 6a and an inoculating material inoculation chamber 6b;
At the bottom of this weir 6 is an inclined communication path 6c for imparting a predetermined speed and swirling motion or stirring motion to the flowing molten metal 1.
is formed.

Reference numeral 7 denotes a wire-type inoculum supply device disposed at the upper part of the inoculum inoculation chamber, and 5 denotes the molten metal 1 in the molten metal level detection chamber 6a.
This is a molten metal level detection sensor that contacts the molten metal and controls the molten metal pushing up device.

As described above, the pressurized automatic pouring device of this invention connects the hot water level detection chamber 6a in which the hot water level detection sensor 5 is arranged and the inoculum supply device 7 by the weir 6 having the communication path 6c in the tap water gutter 3a. Since the placed inoculum is separated from the inoculation chamber 6b, "slag" generated by adding the inoculant to the molten metal 1 in the inoculation chamber 6b will not enter the molten metal level detection chamber 6a due to the presence of the weir 6. This has an excellent practical effect in that the hot water level detection sensor 5 can always accurately control the hot water level in the hot water level detection chamber 6a.

Furthermore, when the stopper 4 is raised to pour the molten metal from the pouring nozzle 2 into the mold, the molten metal 1 flowing from the molten metal level detection chamber 6a through the communication path 6c into the inoculation material inoculation chamber 6b at a predetermined speed is The inoculation chamber 6 is
Since the molten metal in b is given swirling motion and stirring motion, it also has the effect of efficiently mixing the inoculant added from the inoculant supply device 7.

In the above-described embodiment, the inoculum supply device 7 is of a wire type inoculum supply type, but it goes without saying that a granular inoculum supply type may also be used.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the main parts of a conventional pressurized automatic pouring device, and FIG. 2 is a cross-sectional view of the main parts showing an embodiment of this invention. In the drawing, 1 is the molten metal, 2 is the pouring nozzle, 2a is the pouring port, 3
is a furnace body, 3a is an outlet gutter, 4 is a stopper, 5 is a hot water level detection sensor, 6 is a weir, 6a is a hot water level detection chamber, 6b is an inoculant inoculation chamber, 6c is a communication path, and 7 is an inoculant supply device. be. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] The inside of the gushing gutter formed in the upper part of one side of the furnace body is divided into a hot water level detection chamber where a hot water level detection sensor is placed and an inoculant inoculation chamber where an inoculant supply device is placed by a weir having an inclined communication path. 1. A pressurized automatic pouring device, characterized in that a pouring nozzle that is opened and closed by a stopper is provided at the bottom of the inoculum inoculation chamber.