JPS60130450A - Continuous casting device for thin sheet - Google Patents

Abstract

PURPOSE:To obtain a billet having an optional width with a pair of casting drums by forming stationary gates in a way as to contact with the end face of the one casting drum and the cylindrical part of the other casting drum and moving axially the respective drums. CONSTITUTION:Drums 1, 1' are water-cooled casting drums which rotate in the directions opposite from each other and are horizontally disposed apart from each other at the spacing corresponding to the thickness of a metallic strip. A stationary gate 12 consists of a heat resistant material and is pressed to the end face of the drum 1' by a spring 13 and is pressed to the cylindrical part of the drum 1 by a spring 12 so as to bring them into contact therewith. A stationary gate 2' is similarly disposed and a molten metal 4 is supplied into the space formed of the drums 1, 1' and the gates 2, 2'. The molten metal 4 is cooled by the surfaces of the drums 1, 1' and is drawn by pinch rolls 6, 7, by which a billet 3 is obtd. Since the drums 1, 1' can be axially moved, the billet 3 having an optional width is obtd. and the change of the width in the mid-way of casting is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a continuous thin plate casting apparatus that can arbitrarily change the width of a slab.

[Conventional fixed weir arrangement means and their disadvantages] In a thin plate continuous casting machine consisting of two internal water-cooled drums and a fixed weir, the fixed weir is disposed on the body surface of each drum and the end face of each drum. It has been known for a long time that the

Among these, a conventional thin plate continuous casting apparatus in which a body machine IiK fixed weir is provided for each drum will be explained based on FIGS. 1 and 2. Figure j11 is a view of the device viewed from above, and Figure 2 is a cross-sectional view of the Moomdake in Figure 1. This device pours molten metal into a space formed by two fixed weirs 2 and 2' that are inserted between an internal water-cooled drum 1 and a drum 1' and pressed against the surface of the drum body, and continuously forms a thin plate. It was designed to be cast.

With this device, the tip of the fixed weir 2.2' is as thick as the slab, and when trying to obtain a slab thickness of 2 to 5 pieces, the strength of the tip of the fixed weir 2, 2' is insufficient. However, it is impossible to put it into practical use. Also, when the fixed weir 2.2' comes into contact with the molten metal and is thermally deformed, a gap (clearance) is created between the drum 1.1' and the fixed weirs 2, 2', and the molten metal enters (the jug) or flows out. It has a drawback that makes it impossible.

On the other hand, in a conventional thin plate continuous casting machine in which a fixed weir is provided on the end surface of each drum, as shown in FIG. Pour the molten metal into the mold space formed by the fixed weirs 2 and 2',
It is designed for continuous casting of thin plates.

In this device, the width of the slab is determined by the length of the drum. Therefore, in order to obtain slabs with different plate widths, a pair of drums each having the same body length as the plate width is required. In other words, one pair of drums is required for each size of slab, and the drawback is that the width of the slab cannot be changed during casting.

[Object of the present invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a thin plate continuous casting apparatus that eliminates the drawbacks of the conventional apparatus described above. That is, an object of the present invention is to provide a continuous thin plate casting apparatus in which a fixed weir can cope with thermal deformation, and in which slabs of various widths can be obtained using a pair of casting drums.

[Configuration of the present invention]

As a means for achieving the above object, the present invention provides that the fixed weir is in contact with the end face of one casting drum and the body of the other casting drum, and that each casting drum is The point is that you can move to. That is, the present invention consists of two internal water-cooled drums that are arranged horizontally in parallel with a gap corresponding to the thickness of the metal strip to be manufactured and that rotate in different directions, and two internal water-cooled drums that are pressed against the ends of the drums. In a continuous casting apparatus for pouring molten metal into a space formed by a weir to obtain a thin plate, a fixed weir is in contact with the end face of one casting drum and the body of the other casting drum, and each casting This continuous thin plate casting apparatus is characterized in that the casting drums are arranged so as to be pressed against the drums, and each casting drum is configured to be movable in the axial direction.

The present invention will be described in detail below based on Figures 94-6. FIG. 4 is a longitudinal cross-sectional view of a continuous thin plate casting apparatus according to an embodiment of the present invention, FIG. 5 is a schematic diagram of the apparatus shown in FIG. 1g4, viewed from above the casting drum, and FIG. The pressing of a fixed weir is a specific example of a mechanism.

The apparatus shown in FIG. 4 includes water-cooled casting drums 1 and 1' for casting thin plate slabs 3, a side fixed weir 2゜2/ to prevent leakage of molten metal 4 between water-cooled casting drums 1 and 11, and molten metal such as molten steel. 4
The main components include a tandish 5 that stores water.

To explain this device in detail, the water-cooled casting drums 1, 1/
is installed horizontally and is rotated in the direction of the arrow by a drive device (not shown). In addition, this water-cooled casting drum 1,
As shown by the double arrow in FIG. 5, 1' has a mechanism for moving in the axial direction so that the width of the slab can be changed. The water-cooled casting μm rolls 1 and 1' are made of, for example, copper, copper alloy, or steel and have a built-in water-cooling mechanism, and are made of rolls with a considerably large diameter in order to obtain a large contact area with the molten metal 4. .

On the other hand, the fixed weir 2 made of a refractory material is in contact with the end face of the casting drum 1' on one side and the body of the casting drum 1 on the other side, as shown in Fig. JR5. The fixed weir 2' on the opposite side of this fixed weir 2 is reversed, and the casting drum 11
and the end face of the casting drum 1, respectively. These two fixed weirs 2.2' are pressed against the casting drum 1.1') by springs 12.13, as shown in FIG. 6 (the fixed weir 2' is omitted). ing. In addition, in FIG. 6, 11, 1
1' is a mounting frame for the fixed weir 2, and this mounting frame i t
, t i' and the fixed weir 2 are filled with a fireproof heat insulating material 10, and 14 is a support device for the fixed weir 2, which is made of, for example, a piston of an air cylinder.

In FIG. 4, molten metal 4 is poured into a space formed by two fixed weirs 2, 2' and two casting drums 1, 1'. The poured molten metal 4 comes into contact with the surface of the water-cooled casting roll 1.1' and is cooled, and the resulting solidified shell is integrated into a slab 5. This slab 3 is pulled out by a vinyl roll 6. Note that 8 and 9 are guide rollers.

Hereinafter, the present invention will be explained in more detail by giving specific examples of the present invention.

〔Concrete example〕

(1) Water-cooled cast drum made of steel with internal water cooling system. The diameter of the drum is 2000 mm, the length of the drum is 130011110, and the amount of movement of the casting drum in the axial direction is sows in each opposite direction. The slab size is 5 wart x 600~1200■W, and the drum rotation speed (casting speed) is about 28 rm/
It's a win.

(2) Fixed weir The material of the fixed weir in contact with the molten metal is AI! 20. - A graphite, horn nitride (BN) type refractory material, which is pressed by an air cylinder against the end face of one casting drum and the body of the other casting drum.

[Effects of the present invention]

- As detailed above, the present invention has a structure that allows the casting drum to move arbitrarily in the axial direction, and a structure that allows the fixed weir to follow the axial movement of the casting drum (seal the molten metal). This makes it possible to accommodate changes in slab width. Furthermore, even if the fixed weir comes into contact with the molten metal and is thermally deformed, the pressing mechanism allows the fixed weir to follow the arc of the drum, and no leakage of hot water occurs.

Furthermore, in the present invention, in the twin-drum type continuous thin plate casting apparatus, it is possible to obtain a thin plate slab of any width using a pair of casting drums, and the thickness of the plate can be changed arbitrarily even during casting. This produces effects such as:

[Brief explanation of the drawing]

Figures 1 to 3 are diagrams for explaining a conventional thin plate continuous casting apparatus, in which Figure 1 shows a fixed girder installed on the body surface of each drum, and Figure 2 shows a 1g1 diagram. It is a Mumm line sectional view. #! Figure 5 shows a conventional device in which a fixed weir is provided on the end face of each drum. FIG. 4 is a longitudinal cross-sectional view of a continuous thin plate casting apparatus according to an embodiment of the present invention, FIG. 5 is a schematic diagram of the apparatus shown in FIG. 4, viewed from above the casting drum, and FIG. The pressing of a fixed weir in is a specific example of a mechanism. 1.1'... Drum 2.2'... Fixed weir 5... Slab 4... Molten metal 5... Tundish 6.7... Pinch roll 8.9... Guide roller 10 ...Fireproof insulation material i, it'...Mounting frame 12.15...Spring 14...Support device sub-agent 1) Meifuku agent Ryo Hagiwara -

Claims (1)

[Claims] It is formed by two internal water-cooled drums that rotate in different directions, placed horizontally in parallel with a gap corresponding to the thickness of the metal strip to be manufactured, and two fixed weirs pressed against the ends of these drums. In a continuous casting machine for pouring molten metal into a space in which thin sheets are produced, a fixed weir is in contact with the end face of one casting drum and the body of the other casting drum, and is pressed against each casting drum. 1. A continuous thin plate casting apparatus, characterized in that the continuous casting apparatus is arranged in a continuous casting apparatus, and is configured such that each casting drum can move in the axial direction.