JPS6143151B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molten metal discharge control device in a casting equipment.

Conventionally, methods using a stopper, sliding nozzles, and rotary nozzles have been known as means for controlling the discharge of molten metal, but all of them have problems, especially when considering application to small diameter nozzles.

First, in the case of a stopper, the head and nozzle do not fit together well, so cleaning is difficult, especially if residual hot water is left behind, and the stopper has the disadvantage that it cannot be reused and can only be used once. Next, in the case of sliding nozzles and rotary nozzles, the sliding surface is outside the bottom iron skin of the container, and the upper nozzle is usually used, and some kind of filling is used when receiving hot water, so that the sliding surface is outside the bottom steel shell of the container. The method of use is to prevent the molten metal from solidifying, and when discharging the molten metal, it is necessary to take a method to separate the filling or to discard the molten metal, and sliding is performed by moving the lower refractory. As a result, the position of the molten metal to be discharged will move, and the diameter of the lower mold must be wide enough to accommodate at least this moving distance.
In order to prevent this, it was necessary to use another fixed refractory to create a three-plate type, and in this case, two highly accurate sliding surfaces were required. Furthermore, the clamping pressure required to prevent melt leakage on sliding surfaces requires a strong clamping pressure sufficient to overcome the static pressure of the molten metal in the container, and a strong driving force is required to slide against this pressure. It was necessary. In addition, a filler is required, and its existence prevents heating of this part, which causes a drop in the temperature of the molten metal at the beginning of discharging the molten metal, and the presence of the filler also causes the inclusion of some foreign substances. I had some concerns.

The present invention has been made in view of the above, and has an object to provide a molten metal discharge control device as described below to solve the various drawbacks and problems of the prior art.

Next, an example of the implementation of this invention device shown in the drawings will be explained.

1 is a fixed base having a plurality of legs 2;
A lower fireproof panel 3 having a small-diameter nozzle hole 4 is integrally provided on the top. Reference numeral 5 denotes an upper refractory plate that slides on the lower refractory plate 3 and is provided with a large diameter hole 6, and the upper refractory plate 5 is structured to constitute the bottom of a molten metal container 7 made of a refractory material, A container steel shell 8 is coupled to a sliding frame plate 9 provided so as to surround the outer periphery of the upper refractory plate 5 to form an integral structure. On the upper surface of the left and right edges of the sliding frame 9, parallel guide grooves 15 are provided in the front and rear directions.
However, in the center of the front end surface, an operating rod 16 for sliding the upper fireproof panel 5 is provided. 1
Reference numeral 0 denotes support shafts vertically protruding upward at three locations on each of the right and left edges of the fixed base 1, and an arm 13 is loosely fitted to each support shaft 10 at its base, allowing the arms 13 to move up and down. A coil spring 12 is inserted between each arm 13 and a head 11 at the upper end of each support shaft 10. The three left and right arms 13 are fixed to the left and right sliding guide rods 14, respectively, and the left and right sliding guide rods 14 are slidable in the left and right guide grooves 15 of the sliding frame 9, respectively. The upper refractory panel 5 is tightly fastened to the lower refractory panel 3 on both sliding surfaces by the spring action of each coil spring 12. When the operating rod 16 of the sliding frame board 9 is connected to an appropriate drive device and driven in the front and back direction, the upper refractory board 5 slides back and forth with both sliding surfaces tightly tightened. The flow rate of the molten metal can be controlled by the engagement relationship between the large diameter hole 6 and the nozzle hole 4. Further, in the figure, reference numeral 17 denotes a mold provided below the lower refractory panel 3, and its sprue 18 is arranged at a corresponding position directly below the nozzle hole 4.

Next, to explain the operating state, drawings 1, 2, and 3
In the state shown in FIG. 4A, the nozzle hole 4 of the lower refractory panel 3 is completely closed, and the molten metal in the molten metal container 7 is in the closed position state where discharge is blocked. When the upper refractory plate 5 is slid forward in the direction of the arrow by driving the operating rod 16 to reach the state shown in FIG. 4B, the nozzle hole 4 is aligned with the large diameter hole 6.
The open position communicates with the molten metal container 7.
The molten metal inside flows down through the nozzle hole 4 and is poured into the mold 17 through the sprue 18. When the pouring of the metal into the mold 17 is completed, the upper refractory plate 5 is slid backward in the direction of the arrow to return to its original state, resulting in the closed position shown in Fig. 4C after pouring is completed. be. In the above case, the discharge flow rate of the molten metal can be minutely controlled by finely adjusting the opening degree of the nozzle hole 4 by appropriately finely moving the sliding operation of the upper refractory plate 5.

In the embodiment of the drawings, an example is given in which the operating rod 16 is linearly driven in the front-rear direction to cause the upper refractory panel 5 to slide linearly in the front-rear direction. The flow rate of the molten metal may be controlled by applying rotational sliding motion to the molten metal. Further, the diameters of the large diameter hole 6 and the nozzle hole 4 are appropriately set according to the thickness of the upper and lower refractory plates 5, 3, the shape and size of the mold 17, the amount of poured metal, the temperature of the molten metal, etc. Large diameter hole 6
It is also possible to provide a plurality of nozzle holes 4 as necessary to perform discharge control. It goes without saying that if the upper refractory panel 5 slides by rotational sliding, the structure of the tightening means, sliding guide means, etc. will be different accordingly.

As described above, this invention device comprises a lower refractory panel 3 having a small-diameter nozzle hole 4 provided in a fixed base 1, and a lower refractory panel 3 having a large-diameter hole 6 and constituting the bottom of a molten metal container 7. It consists of an upper refractory panel 5 that slides on the panel 3, and is provided with a drive means that slides the upper refractory panel 5 in a state in which both are tightly tightened on the sliding surface, and a large diameter hole 6 and a nozzle hole 4 are connected to each other. The flow rate of the molten metal is controlled by engagement, and since no filler is used, there is no need to remove the filler, there is no fear of molten metal contamination due to the filler, and the lower refractory plate 3 is fixed. Therefore, it is easy to position the mold 17 that receives the pouring of the metal, and the pouring of the metal into the small-hole mold can be performed reliably and stably. In particular, the diameter of the nozzle hole 4 is determined only by the lower refractory plate 3, and by using the small diameter nozzle hole 4 and slightly adjusting its opening degree, there is an excellent effect that the discharge of molten metal can be controlled in a small amount. Further, in the device of the present invention, since the load of the upper molten metal container 7 and the molten metal in the container 7 acts on the sliding upper fireproof panel 5, the upper and lower fireproof panels 5 on the sliding surface,
The tightening between 3 and 3 can be reduced by this load, which has the advantage that the tightening device can be simplified and the sliding driving force decreases as the molten metal discharge progresses. In addition, inspection and maintenance of the sliding surfaces is easy, and since the upper refractory plate 5 constitutes the bottom of the molten metal 7, it can be moved to another location together with the container 7, making it easy to remove solidified material. It has the effect of allowing you to

[Brief explanation of the drawing]

The drawings show an embodiment of the apparatus of the present invention, in which Fig. 1 is a longitudinal front view, Fig. 2 is a plan view, Fig. 3 is a longitudinal left side view, and Figs. It is a longitudinal side view of the main part of each stage. 1...Fixed stand, 2...Legs, 3...Lower fireproof panel,
4... Nozzle hole, 5... Upper fireproof board, 6... Large diameter hole, 7... Molten metal container, 8... Container iron skin, 9...
...Sliding frame board, 10...Spindle, 11...Head, 12
... Coil spring, 13 ... Arm, 14 ... Sliding guide rod, 15 ... Guide groove, 16 ... Operating rod, 1
7... Mold, 18... Sprue.

Claims (1)

[Claims] 1. A lower refractory panel 3 having a small-diameter nozzle hole 4 provided on a fixed base 1, and an upper refractory panel 3 sliding on the lower refractory panel 3 having a large-diameter hole 6 and constituting the bottom of a molten metal container 7. The upper fireproof panel 5 is made up of a panel 5, and the upper fireproof panel 5
1. A molten metal discharge control device characterized in that the molten metal discharge control device is provided with a drive means for sliding the molten metal, and is configured to control the flow rate of the molten metal by engagement between the large diameter hole 6 and the nozzle hole 4.