JPS637422Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a stopper type pouring furnace.

Conventionally, as a stopper type pouring furnace, for example,
The one shown in FIG. 1 is known. In this type of pouring furnace 1, by applying a predetermined atmospheric pressure to the hot water storage chamber 2 from a pressure regulating device (not shown), the level of the molten metal 3 in the hot water storage chamber 2 is lowered, and the level of the molten metal 3 in the hot water pouring chamber 2 is lowered. While raising the hot water level at and maintaining the hot water level at a predetermined level L, a tip 6a of a rod-shaped stopper 6 that is movable up and down is fitted into the hot water storage port 5 of the hot water pouring chamber 4. At the same time, the pouring port 5 is closed.

When pouring, a predetermined amount of molten metal 3 is poured into a mold (not shown) by moving the stopper 6 upward for a predetermined period of time and opening the pouring port 5. There is.

However, in the above conventional pouring furnace 1, when the stopper 6 is raised during pouring, slag 7 etc. may adhere to the circumferential surface of the tip 6a of the stopper 6, or the stopper 6 may When the tip 6a is fitted into the spout 5, the molten metal 3 is drawn into the fitting part, so that the tip 6a of the stopper 6 and the spout 5 are completely connected, as shown in FIG. A gap is formed without close contact, and the molten metal 3 leaks wastefully from the gap, resulting in a complete so-called "out of hot water".
The disadvantage was that it was difficult to carry out.

This invention was made to eliminate the above-mentioned drawbacks, and by rotating the stopper in a stopper-type pouring furnace and fitting the tip of the stopper into the spout, the spout can be tightly closed. ,
Therefore, it is an object of the present invention to provide a stopper type pouring furnace that can quickly and reliably run out of hot water.

An embodiment of this invention will be described below with reference to FIG.

In addition, in FIG. 3, the parts equivalent to the constituent parts in the pouring furnace 1 of FIG. 1 are given the same reference numerals, and the description thereof will be omitted.

In FIG. 3, 11 is, for example, a hydraulic cylinder, and this cylinder 11 is vertically fixed at an appropriate position outside the pouring chamber 4 in the pouring furnace by a support member (not shown). be.
The piston 12 of this cylinder 11 is movable up and down (in the direction of arrow A-A') by hydraulic pressure.

A horizontally extending support arm 13 is fixed to an upper end 12a of the piston 12 in the cylinder 11, and a geared motor 14 is attached to an end 13a of the support arm 13. A cylindrical stopper 6 made of a highly heat-resistant material such as ceramic is attached to the output shaft 14a of the geared motor 14 via a fixing member 15 so as to hang down therefrom. The set position of the stopper 6 is determined so that the center axis O of the stopper 6 coincides with the center of the pouring port 5 of the pouring chamber 4. Furthermore, the tip 6a of this stopper 6 is formed into a tapered shape, and this tapered surface is formed in the pouring port 5.
The pouring spout 5 is brought into a closed state by contacting the peripheral surface 5a formed in a mortar shape.

In the pouring furnace having the above configuration, the level of the molten metal 3 in the pouring chamber 4 is now maintained at a predetermined pre-level L as shown by the two-dot chain line in FIG. 3 using a known method. At the same time, when the piston 12 of the hydraulic cylinder 11 is raised in the direction A, the stopper 6 is raised together with the geared motor 14, and the pouring port 5 is kept open for a predetermined time, and a predetermined amount of molten metal is poured from the pouring port 5. is poured out.

On the other hand, when closing the spout 5, when the geared motor 14 is rotated and the piston 12 of the hydraulic cylinder 11 is lowered, the stopper 6 rotates around its axis and moves toward the spout 5. The stopper 6 descends, and the tip 6a of the stopper 6 comes into contact with the circumferential surface 5a of the pouring spout 5 while sliding in the circumferential direction, closing the pouring spout 5 and stopping pouring. As described above, the stopper 6 is rotated and brought into contact with the circumferential surface of the pouring spout 5 while sliding in the circumferential direction to close the pouring spout 5, so even if slag is attached to the tip of the stopper 6. As the stopper slides, the molten metal is separated from the stopper, and the pouring port can be reliably closed, thereby preventing leakage of the molten metal.

When the spout 5 is closed, the geared motor 1
4 stops.

In this invention, the means for moving the stopper 6 up and down is not limited to the cylinder, and any method may be used. For example, a male thread is formed on the circumferential surface of the stopper 6, and a female thread is provided on an appropriate guide member. The male thread of the stopper is fitted into the part, and the stopper is guided by the screw by rotation of the stopper,
The spout may be opened and closed by moving up and down.

As detailed above, according to this invention, in a pouring furnace in which the pouring spout of the pouring furnace is opened and closed by a stopper to control pouring, the stopper is rotated and its tip is opened and closed at the tap. Since the outlet is closed while sliding in the circumferential direction of the stopper, even if slag etc. adheres to the tip of the stopper, the force of sliding contact of the stopper will ensure that the adhered material is peeled off. The tip part and the circumferential surface of the spout can be brought into complete contact with each other, that is, the spout can be reliably closed.
Leakage of molten metal can be reliably prevented.

Also, based on the rotational force of the stopper, when the tip of the stopper advances toward the pouring port,
The molten metal wrapped around the circumferential surface of the tip is removed by the centrifugal force of the tip. Therefore, the tip can quickly and reliably come into close contact with the circumferential surface of the spout, and the spout can be sealed securely and quickly without molten metal getting caught up in it, allowing for rapid "draining" at the end of pouring. It also has the excellent advantage of being able to perform the pouring work reliably and with high precision.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the configuration of a conventional stopper type pouring furnace, Figure 2 is an enlarged view of the main parts of the pouring furnace shown in Figure 1, and Figure 3 is an enlarged view of the main parts of the pouring furnace of Figure 1. Partially cutaway enlarged view showing the configuration of one embodiment of 4.
The figure shows a state in which the pouring port in the pouring furnace of FIG. 3 is closed. 1... Pouring furnace, 2... Hot water storage room, 3... Molten metal, 4
...Pouring chamber, 5...Pouring port, 6...Stopper, 6
a...Tip, 11...Hydraulic cylinder, 12
... Piston, 13 ... Support arm member, 14 ... Geared motor, 15 ... Fixing member.

Claims (1)

[Scope of utility model registration request] In a stopper-type pouring furnace that opens and closes the pouring spout by moving a stopper that fits into the spout of the pouring furnace in the axial direction of the hole in the pouring spout, the stopper is rotated in its circumferential direction. A stopper type pouring device, characterized in that a rotational drive means is provided, and while the stopper is rotated by the rotational drive means, the tip of the stopper is fitted into a pouring spout to close the pouring spout. Furnace.