JPH11179534A - Pouring ladle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the mixing of foreign material of slag, etc., in a pouring ladle into a mold. SOLUTION: This pouring ladle 13, in which molten metal 30 can be stored and this molten metal 30 is made to flow out from a pouring hole 22, is constituted of a plate-shaped slag holding member 27 which is shakably bung down from a horizontal shaft 26 and also, can dip into the molten metal 30 from the surface of molten metal 30, and a weighting body fitted to a beam 28 which can integrally rotate with the slag-holding member 27. Further, a balancer 29 for acting the rotational moment around the horizontal shaft 26 is provided in the slag holding member 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a casting ladle.

[0002]

2. Description of the Related Art A centrifugal casting apparatus is one type of casting apparatus. This centrifugal casting device allows the molten metal to flow out of the casting ladle by tilting the casting ladle that is capable of storing the molten metal and allows the molten metal to flow out of the pouring spout. It is designed to be poured into a horizontal rotating mold via a chute and supplied.

[0003] Slag is generally suspended in the molten cast iron stored in the casting ladle of this centrifugal casting apparatus, and it is customary to perform casting after removing slag to remove the slag. It is.

[0004]

However, it is very difficult to completely remove the slag floating on the molten iron even if the slag is removed, and some of the slag is cast into the mold together with the molten metal. I will be rare. For this reason, there is a problem that the molten metal solidifies while containing foreign matter, and a poor quality iron tube is formed.

[0005] Therefore, an object of the present invention is to solve such a problem and prevent foreign substances such as slag in a casting ladle from being mixed into a mold.

[0006]

According to the present invention, there is provided a casting ladle capable of storing molten metal and allowing the molten metal to flow out of a spout. And a lower end portion is constituted by a plate-shaped depressing member capable of entering the inside of the molten metal from the surface of the molten metal, and a weight attached to a rod body that can rotate integrally with the depressing member. And a balancer for applying a rotational moment about the horizontal axis to the depressing member.

[0007] With such a configuration, the lower end of the gland holding member that is hung down from the horizontal axis can enter the inside of the molten metal from the surface of the molten metal. It is prevented from reaching the downstream side and flowing out of the spout. In addition, since the grit holding member is hung freely from the horizontal shaft, the lower end thereof reaches the molten metal regardless of the tilting of the ladle for casting. Furthermore, since the rotational moment about the horizontal axis is applied to the depressing member by the balancer, the depressing member is prevented from losing the flow of the molten metal and opening downstream. Therefore, the outflow of the slag is reliably prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 11 denotes a centrifugal casting device, which guides a casting ladle 13 according to the present invention and a molten metal poured out of the casting ladle 13 to a rotating mold (not shown). And a chute 14.

[0009] The casting ladle 13 is formed of a square body having a triangular shape when viewed from the front.
And a rear wall 20. An opening 21 is formed in the upper part. Further, the casting ladle 13 is capable of being poured around the horizontal axis and tilted, so that the molten metal can be poured out of the spout 22 into the chute 14. The molten metal flowing out of the spout 22 is guided by the chute 14 and supplied to the inside of a rotating mold (not shown).

As shown in FIGS. 1 to 4, a horizontal shaft 26 is rotatably supported by a bracket 25 near the pouring opening 22 in the casting ladle 13.
Rectangular plate-shaped refractory squeegee member 2 that can rotate together with
7 is suspended from the horizontal shaft 26 toward the inside of the casting ladle 13. That is, the grime holding member 27 is configured to always assume a vertically downward posture by its own weight regardless of the tilting state of the casting ladle 13.

At one end of the horizontal shaft 26, one end of a rod 28 disposed radially of the horizontal shaft 26 at a position outside the casting ladle 13 is fixed.
8 is rotatable integrally with the horizontal shaft 26. The rod body 28 is arranged in a direction different from the scale holding member 27 from the horizontal shaft 26.

A balancer 29 composed of a weight is fitted on the rod 28, and the balancer 29 is fixed to the rod 28 at an arbitrary position along the length of the rod 28. I have. The fixing position of the balancer 29 can be arbitrarily changed by using a push screw or the like as the fixing means.

The rod body 2 having the balancer 29 as described above
Since 8 is arranged in a direction different from that of the depressing member 27, it is possible to apply a rotational moment to the depressing member 27 that is going to hang down from the horizontal shaft 26. In detail, the rod 28 is a hanging member 2 in a hanging state.
7, the balancer 29 is inclined in a direction closer to the spout 22, so that the balancer 29 rotates the grime holding member 27 toward the back of the casting ladle 13 opposite to the spout 22. It is configured to exert a moment.

According to such a configuration, as shown in FIG. 2, the casting ladle 13 in which the molten metal 30 is stored is tilted as shown in FIG. 3, and the molten metal 30 is caused to flow out from the pouring port 22 thereof. Then, the dirt holding member 27 hanging down from the horizontal shaft 26
Of the melt 30 enters the inside of the melt 30 from its surface. As a result, the slag floating on the surface of the molten metal 30 is dammed by the squeegee holding member 27, and only the molten metal 30 not containing the slag is connected to the lower end of the slag holding member 27 and the casting ladle 1
3 and flows out from the spout 22.

At this time, the dirt holding member 27 is connected to the horizontal shaft 26.
Therefore, the lower end of the casting ladle 13 can always reach the molten metal 30 regardless of the tilting posture of the casting ladle 13. Further, the casting ladle 13 which is opposite to the pouring port 22 by the balancer 29 is attached to the grime holding member 27.
Since the moment acts in the direction of rotation toward the back side of the metal, the depressing member 27 is prevented from losing the flow of the molten metal 30 and opening downstream. In addition, it is possible to prevent the grit holding member 27 from rising from the slag due to buoyancy from the molten metal 30. Therefore, the outflow of the slag is reliably prevented.

A balancer 29 along the length of the rod 28
The magnitude of the moment acting on the depressing member 27 can be adjusted by changing the fixing position of. Thereby, the slag can be held down by the grit holding member 27 with an appropriate force. Therefore, the holding force is too weak and the slag flows out. On the contrary, the holding force is too strong and the molten metal 30
Can be reliably prevented from flowing out.

FIG. 4 shows a state after all the molten metal in the casting ladle 13 has flowed out. As shown in the figure, in this state, an appropriate gap 31 is formed between the lower end of the depressing member 27 and the bottom wall 18 of the ladle 13, so that the depressing state shown in FIG. It can contribute to making the depressing power appropriate.

In this way, it is possible to reliably prevent the slag from flowing out of the casting ladle 13, and the slag is supplied to the rotating mold 12
It can be reliably prevented from flowing into the inside and mixing into the product.
In addition, although the case where the casting ladle 13 of the present invention is applied to the centrifugal casting device has been described above, it is also possible to apply this to other casting devices that do not perform centrifugal casting. .

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A casting ladle 13 provided with a grime holding member 27 having the structure shown in the drawing was used. The size of the gap 31 between the lower end portion of the scale holding member 27 and the bottom wall 18 of the ladle 13 was 20 mm. Then, 65 kg of molten metal is immersed in an inner diameter of 118 mm,
Ladle 13 so that it can be cast in a rotating mold having a total length of 4 m in 2.3 seconds.
Was tilted to perform centrifugal casting to form a tube. As a result, no foreign matter was found in the molded tube.

[0020]

As described above, according to the present invention, a plate-shaped depressing member which can oscillate from a horizontal axis and whose lower end can enter the inside of the molten metal from the surface of the molten metal. A slug floating on the surface of the molten metal is provided by a balancer configured by a weight body attached to a rod body that can rotate integrally with the scale-holding member, and a balancer that applies a rotational moment about the horizontal axis to the scale-holding member. It can be prevented from reaching the downstream side from the pouring member and flowing out of the spout, and since the poisoning member is swingably suspended from the horizontal axis, regardless of the tilt of the ladle for casting The lower end can reach the molten metal, and the balancer can apply a rotational moment about the horizontal axis to the depressing member. Lost the record can be prevented from opening to the downstream side, it can be reliably prevented from flowing out of this for slag.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a centrifugal casting apparatus provided with a casting ladle according to an embodiment of the present invention.

FIG. 2 is a view showing a state before tilting of a casting ladle in FIG. 1;

FIG. 3 is a view showing a state where the casting ladle is being tilted.

FIG. 4 is a view showing a state after the casting ladle is tilted.

[Explanation of symbols]

 22 Spouting spout 26 Horizontal axis 27 Stain holding member 28 Rod 29 Balancer 30 Molten metal

Claims (1)

[Claims] 1. A casting ladle which is capable of storing molten metal and allows the molten metal to flow out of a spout. The casting ladle is swingably suspended from a horizontal axis, and a lower end of the molten metal is provided at a lower end of the molten metal. A plate-shaped depressing member that can enter the inside of the molten metal from the surface and a weight attached to a rod that can rotate integrally with the depressing member, and the depressing member rotates around the horizontal axis. A casting ladle comprising a balancer for applying a moment.