JPH01321059A - Pouring device - Google Patents

Abstract

PURPOSE:To prevent flowing-out of slag at the time of pouring molten metal by dividing a triangular ladle into two parts of a molten metal receiving part and a molten metal pouring part with vertical partition wall and arranging a submerged weir at the lowest part in the vertical partition wall, a heat insulating cover on the upper face of the molten metal pouring part and a gas burner at the tapping hole. CONSTITUTION:At the time of supplying the molten metal 19 into the molten metal receiving part 10 in the triangular ladle 6, the molten metal 19 is supplied into the molten metal pouring part 11 from the submerged weir 13 at the lowest part in the vertical partition wall 9. Then, the slag 20 on the molten metal surface in the molten metal receiving part 10 is cut off with the vertical partition wall 9 and not invaded in the molten metal pouring part 11. On the other hand, by blowing reducing flame 18 generated with the gas burner 17 to gap between the molten metal surface of the molten metal pouring part 11 and the heat insulating cover 16, as the molten metal surface in the molten metal pouring part 11 is brought into contact with the reducing atmosphere, the slag 20 is not generated. Successively, at the time of pouring the molten metal 19 in the molten metal pouring part 11 from the tapping hole 14 by tilting the ladle 6, even if a little quantity of slag 20 is generated, as the slag is blown off toward rear part at the tapping hole 14 with the reducing flame 18, it is not fear to flow out the slag 20.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a pouring device for pouring molten metal into a centrifugal casting mold.

BACKGROUND OF THE INVENTION In a conventional pouring device of this type, molten metal was poured from a triangular ladle with an open top into a centrifugal casting frame through a chute and a pouring section.

Problems to be Solved by the Invention However, in the conventional structure described above, since the top surface of the triangular ladle is open, the surface of the molten metal in the ladle oxidizes and slag floats, and it takes a lot of effort to remove this slag. Not only is it time-consuming, but the slag also invades the product and degrades the quality.

The present invention aims to solve these conventional problems, prevent the oxidation of the hot water surface in the triangular ladle, and effectively remove the generated slag.

Means for Solving the Problems In order to solve the above conventional problems, the pouring device of the present invention is a pouring device that pours molten metal from a triangular ladle into a centrifugal casting metal frame through a pouring section. , the triangular ladle is divided into two by a vertical partition wall into a receiving part and a pouring part, and a sink weir is provided at the lowest part of the vertical partition wall to communicate the receiving part and the pouring part. The pouring section is provided with a heat insulating cover on its upper surface and a gas burner that generates a reducing external flame at the outlet.

Function: In the configuration of the present invention described above, molten metal is supplied to the receiving portion of the triangular ladle. In the hot water receiving section, the surface of the hot water is oxidized and Slazo is floating. However, since the molten metal in the receiving section is supplied to the pouring section from the submerged weir at the bottom of the vertical partition wall, the slazo floating in the receiving section is blocked by the vertical partition wall.
There is no risk of it entering the pouring area. In the pouring section, the reducing external flame generated by the gas burner is blown from the outlet between the hot water surface and the heat insulating cover, forming a reducing atmosphere there, so that the hot water surface is in contact with this reducing gas. Not only does this prevent oxidation, but even if a small amount of sludzo is generated and attempts to flow out into the pouring section, it is blown back to the rear by the reducing external flame at the tap outlet. Therefore, it is possible to prevent slazo from entering the product and degrading its quality.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.

As shown in FIG. 1, the pouring device 1 of this embodiment includes a metal frame rotating machine 2 and a pouring cart 3,
is attached. The metal frame rotation 812 is of a stationary type and supports the centrifugal casting metal frame 5 so as to be rotatable in the lateral direction. The pouring cart 3 includes a triangular ladle 6, a chute 7, and a pouring part 8, and is configured to be able to move toward and away from one end of the centrifugal casting metal frame 5.

As shown in FIGS. 2 and 3, the triangular ladle 6 is an inverted triangular ladle with an open upper surface, and is divided into two parts, a receiving part 10 and a pouring part 11, by a vertical partition wall 9 in the middle. , two support arms 12 are protruded from the outside of both side walls. Vertical partition wall 9
A sink weir 13 is provided at the lowest part of the melt receiving part 10 and the melt pouring part 11 to communicate with each other at the bottom. Pouring part 1
On the upper surface of 1, a tap hole 14 is formed in one couple part, and a heat insulating cover 16 is provided via two hinges 15 so as to be openable and closable. The triangular ladle 6 has a support arm 12
The pouring cart 3 is tiltable in the direction of arrow A (see FIG. 3) around the rotation center line XX passing through the tap outlet 14.
, and is tilted at a constant angular velocity by a tilting device (not shown). Facing the tap water outlet 14,
A gas burner 17 is provided. gas burner 17
This generates a reducing external flame 18 for removing sludzo and preventing oxidation of the hot water surface in the pouring section 11.

Next, a description will be given of a pouring operation using the pouring device 1 described above.

First, when the molten metal 19 is supplied into the receiving part 10 of the triangular ladle 6, this molten metal 19 is poured into the sink weir 1 at the bottom of the vertical partition wall 9.
3 into the pouring section 11. At that time, the hot water receiving part 10
Surazo 20 due to oxidation is floating on the hot water surface,
This slug 20 is blocked by the vertical partition wall 9 and does not enter the pouring section 11.

On the other hand, the gas burner 17 is combusted, and the generated reducing external flame 18 is blown between the molten metal surface of the pouring part 11 and the heat insulating cover 16' to form a reducing atmosphere there. Pouring part 11
Since the hot water surface is in contact with this reducing atmosphere, oxidation is prevented and slazo 20 is not generated.

Next, the centrifugal casting metal frame 5 is rotated at high speed by the metal frame rotating machine 2, and the pouring cart 3 is brought close to the metal frame rotation 82, and the pouring unit 8
is inserted into the centrifugal casting metal frame 5 (see the two-dot chain line in FIG. 1).Next, the triangular weir f56 is tilted at a constant angular velocity by the tilting device (see FIG. 4), and the inside of the pouring part 11 is inserted. Molten metal 19
The molten metal is continuously poured into the centrifugal casting frame 5 from the tap 14 via the chute 7 and the pouring section 8 at a constant flow rate. It should be noted that no sludzo 20 should be generated on the surface of the pouring part 11, but even if a small amount of sludzo 20 is generated and tries to flow out into the chute 7, it will be pushed backwards by the reducing outer flame 18 at the outlet 14. Because it will be blown back to Surazo 2
There is no risk of the molten metal flowing out into the chute 7.Next, while continuing pouring, gradually move the pouring cart 3 away from the metal frame rotation 11!2, and pull out the pouring part 8 from the centrifugal casting metal frame 5. As a result, the centrifugal casting metal frame 5 is poured over its entire length, forming a product such as a cast iron pipe. In addition, when pouring, it is not necessary to pour all of the molten metal 19 in the triangular ladle 6, but to ensure that there is enough remaining molten metal to prevent the dip weir 1G- from being exposed (see FIG. 5). The reason is that the hot water receiving part 1
This is a slant that prevents the sludzo 20 inside 0 from entering into the pouring part 11 from the sink weir 13. Finally, when the pouring is completed, the combustion of the gas burner 17 is stopped and the triangular number g
The J6 is returned to its original position and the cooled and solidified product is pulled out into the drawing machine 4.

Effects of the Invention As described above, according to the present invention, a triangular ladle is divided into two by a vertical partition wall into a receiving part and a pouring part, and the molten metal supplied into the receiving part is poured into the lowest part of the vertical partition wall. Since the molten metal is supplied from the pouring weir into the pouring section, the molten metal floating on the surface of the receiving section will not enter the pouring section. Because it is in contact with the reducing atmosphere formed by the molten flame, oxidation is prevented and not only does slazo not occur, but even if a small amount of slazo is generated and flows into the pouring area, it will not be removed at the tap outlet. Since it is blown back to the rear by the reducing flame, there is no risk of it flowing into the pouring section. Therefore, it is possible to prevent slazo from entering the centrifugal casting metal frame during pouring, and improve the quality of the product. improves.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view thereof;
Figure 2 is a plan view of the triangular ladle, Figure 3 is a sectional view along the line ■-■ in Figure 2, Figure 4 is a sectional view showing the tilting state of the triangular ladle during pouring, and Figure 5 is a sectional view of the triangular ladle. FIG. 3 is a cross-sectional view showing the tilting state of the triangular ladle when pouring is completed. DESCRIPTION OF SYMBOLS 1... Pouring device, 5... Centrifugal casting metal frame, 6... Triangular ladle, 8... Pouring section, 9... Vertical partition wall, 10...
... Hot water receiving part, 11... Molten pouring part, 13... Slip weir,
14... Water outlet, 16... Heat insulation cover, 17...
Gas burner, 18... Reducing flame, 19... Molten metal. Agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. In a pouring device for pouring molten metal from a triangular ladle into a centrifugal casting metal frame via a pouring section, the triangular ladle is divided into two by a vertical partition wall into a receiving section and a pouring section, A sink weir is provided at the lowest part of the vertical partition wall to communicate the molten metal receiving section and the molten pouring section, and the molten pouring section has a heat insulating cover on its upper surface and a reducing flame generated at the tap outlet. A pouring device characterized in that it is provided with a gas burner and a gas burner.