JPS583772A - Controller for discharging of molten metal - Google Patents

Abstract

PURPOSE:To facilitate flow rate controlling of molten metal by bringing a lower refractory board having a nozzle hole of a small bore and an upper refractory board provided with a large diameter hole constituting the bottom part of a molten metal vessel into tight contact with each other and sliding the upper molding board. CONSTITUTION:The bottom part of a molten metal vessel 7 is constituted of an upper refractory board 5, and a large diameter hole 6 is provided. A lower refractory board 3 having a nozzle hole 4 of a small bore is provided in the lower part thereof and the board 5 is clamped in tight contact with the board 3 by means of arms 13 having coil springs 12. With the hole 4 of the board 4 held closed thoroughly by the board 5, molten metal is introduced into the vessel 7, and the upper refractory board is slided by an actuating rod 16 to communicate the hole 4 and the hole 6, thereby charging the molten metal through a sprue 18 into a mold 17. It is possible to control the discharge flow rate of the molten metal finely by adjusting the opening of the hole 4 finely by proper fine adjustment operation of the sliding movement of the board 5.

Description

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

Conventionally, a stopper is used as a means for controlling the discharge of molten metal, a sliding nozzle, and the like. - Tally nozzles are known, but they all 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 properly, so cleaning is difficult, especially if residual hot water is left behind, and the stopper cannot be reused, meaning it can only be used seven times. Next, Slide Day: - In the case of a gun nozzle or a rotary nozzle, 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. The method of use is to prevent the molten metal from coagulating, 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 requires moving the lower refractory. carried out by
Therefore, the position of the discharged molten metal moves, and r
The diameter of the part mold needs to be wider than this moving distance, and to prevent this, it is necessary to use a three-piece type with another fixed refractory. In this case, highly accurate two sliding surfaces were required.

Furthermore, the tightening pressure required to prevent melt leakage on the sliding surface is strong enough to overcome the static pressure of the molten metal in the container, and in order to slide against this pressure, a strong tightening pressure is required. If it requires a driving force, it also requires a filling, 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. There was a concern that some contaminants may be present.

The present invention has been made in view of the above, and provides a molten metal discharge control device as described below, and eliminates the various drawbacks of the conventional method.
It was created for the purpose of solving various problems.

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

l is a fixed base having a plurality of legs 2, and on this fixed base l,
A lower fireproof panel 3 having a small diameter nozzle hole t is integrally provided. S is 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 g is coupled to a sliding frame board 9 provided so as to surround the outer periphery of the upper fireproof board S, forming an integral structure. On the upper surface of the left and right image side edges of the sliding frame board W, there are parallel guide grooves /S in the front and rear directions, and in the center of the front end surface there is an operating rod for sliding the upper fireproof board S. A is provided for each. Reference numeral 10 denotes support shafts vertically protruding upward at three locations on each of the left and right edges of the fixed base l, and an arm /3 is loosely fitted into each support shaft IO at its base so that it can be raised and lowered, respectively. and each arm/3 and each support shaft IO
A coil spring 12 is inserted and interposed between the upper end head //. Then, 13 arms, 3 each on the left and right, are fixed to the left and right sliding guide rods lt, respectively, and the left and right sliding guide rods /4'
are slidably inserted into the left and right guide grooves /S of the sliding frame board 9, respectively, and the upper fireproof board S slides against the lower fireproof board 3 by the spring action of each coil spring 12. It is in a state where it is tightly tightened on the moving surface. When the operating rod 6 of the sliding frame plate is connected to an appropriate drive device and driven in the front and back direction, the upper refractory plate 3 slides back and forth while both are tightly tightened in the sliding movement. The flow rate of bath water can be controlled by the engagement relationship between the large diameter hole 6 and the nozzle hole t.

In addition, 17 in the figure is a mold provided below the lower refractory plate 3, and its sprue/I is placed at a corresponding position directly below the nozzle hole q.

Next, to explain the operating state, in Figure 1.2.3 of the drawing (A), the third nozzle hole l of the fireproof panel F is completely closed, and the inside of the molten metal container 7 is completely closed. It is in the closed position state in which the discharge of the molten metal is far away, and from this state, the operating rod 16 is operated to slide the upper refractory plate 3 forward in the direction of the arrow, and the state shown in Fig. (B) is reached. Then... The nozzle hole is in an open position communicating with the large diameter hole t, and the molten metal flows downward through the nozzle hole in the molten metal container 7,
The molten metal is poured into the mold 17 through lifting weight/g.

After pouring the metal into the mold/7, the upper refractory plate S
When it is slid backward in the direction of the arrow to return to its original state, the position becomes the closed position after pouring is completed as shown in Figure (0). In the above case, the discharge flow rate of the molten metal can be minutely controlled by appropriately adjusting the sliding operation of the upper refractory plate S to minutely adjust the opening degree of the nozzle hole.

In the drawing embodiment, 1 is an example in which the operating rod 4 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 refractory plate 3. Also, the diameter of the large diameter hole 6 and nozzle hole t, upper and F section fireproof panel! , 3, the shape and size of the mold 17, the amount of poured metal, the temperature of the molten metal, etc., but a plurality of the large-diameter holes 6 and a plurality of nozzle holes t may be provided as necessary for discharging. It can also be controlled. If the upper refractory panel S slides in a rotational manner, the structure of the tightening means, sliding guide means, etc. will of course be different accordingly.

This inventive device comprises a lower refractory plate 3 having a small-diameter nozzle hole t provided on a fixed base l like a ridge, and a lower refractory plate 3 having a large-diameter hole 6 and constituting the bottom of a molten metal container 7. It consists of an upper refractory plate 5 that slides on the plate 3, and is equipped with a driving means for sliding the upper refractory plate j with both of them tightly tightened on the sliding surface, and has a large diameter hole B and a nozzle hole. The flow rate of the molten metal is controlled by engagement with the holder, and since no filler is used, there is no need to remove the filler, there is no need to worry about contamination of the molten metal by the filler, and the lower refractory plate 3 is fixed. Because of this, it is easy to position the mold 17 that receives the pouring of the molten metal, and the molten metal can be reliably and stably poured into the small-pore mold. In particular, the diameter of the nozzle hole is determined only by the lower refractory plate 3, and by slightly adjusting the opening degree using the small diameter nozzle hole t, there is an excellent effect that the discharge of the molten metal can be controlled in a small amount. Further, in the apparatus of the present invention, the upper molten metal container 7 and the container 7
Because the load of the internal molten metal acts on the sliding upper refractory plate j,
Upper and lower fireproof panels on sliding surfaces! , 3 can be reduced by this load, and the tightening has the advantage that the device part can be simplified and the sliding driving force decreases as the molten metal discharge progresses. In addition, it is easy to inspect and maintain the sliding surfaces, and the bottom of the molten metal 7 in the upper fireproof plate can be moved, making it easy to perform operations such as removing solidified matter.

[Brief explanation of the drawing]

The drawings show an embodiment of the device according to the present invention, in which Fig. 1 is a vertical front view, Fig. 2 is a plan view, Fig. 3 is a longitudinal left side view, and Figs. FIG. 1. Fixed stand, 2. Legs, 3. Lower fireproof panel. T... Nozzle hole, S... Upper fireproof panel, 6. Large diameter hole, 7
・・Molten metal container, ・Container shell, 9・Sliding frame board, i
o, Support shaft, ii, Head, /2, Coil spring, 13.
・Arm, /ri・Sliding guide rod, /j,, guide groove, /
6. - Operating rod, /7.2# type, it, sprue. Patent applicant Tokyo Ceramics Co., Ltd.

Claims (1)

[Claims] A lower refractory board 3 having a small diameter nozzle hole and an upper part sliding on the lower refractory board 3 having a large diameter hole 6 and constituting the bottom of a molten metal container 7 are installed on the fixed base l. It consists of a refractory plate 5, and is provided with a driving means for sliding the upper refractory wall S in a state where both are tightly tightened on the sliding surface, and the flow rate of the molten metal is controlled by the engagement of the large diameter hole 6 and the nozzle hole t. A molten metal discharge control device characterized by: