JPS60234738A - Continuous casting device - Google Patents

Abstract

PURPOSE:To provide a cooling effect with a simple and small-sized construction and to manufacture a satisfactory continuous casting flat plate by pouring a molten metal into the space between an internally water-cooled inside cylindrical mold and an outside cylindrical mold which are concentrical, incising a casting pipe and forming the same into a flat plate shape by expanding rolls. CONSTITUTION:The molten metal is uniformly poured from an upper tundish 5 into the space between the internally water-cooled inside cylindrical mold 2 and internally water-cooled outside cylindrical mold 3 which are concentrical. The red hot solidified casting pipe 8 emerging from the molds 2, 3 is incised by a slitting blade 7 and is developed to a flat plate shape 4 by the expanding rolls 11 which are actuated by hydraulic cylinders 12. The continuous casting flat plate which is uniformly cooled and solidified by the simple and small-sized installation is provided.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a continuous casting device that is capable of continuously manufacturing thin plates by cutting a cast pipe directly cast from molten metal. .

[Conventional technology]

In recent years, techniques for directly casting thin plates from molten metal such as molten steel are being developed. For example, as shown in Fig. 1, a gap G equivalent to the thickness of the thin plate to be cast is formed using twin rolls (a), twin belts, or twin caterpillars that can be cooled internally, and the molten metal is cooled and cast. The belt-shaped thin plate (b) is continuously cast through a gap O.

However, in either method, when the molten metal is cooled and solidified to form the thin plate (b), it contracts, and the semi-solid thin plate (
b) separates from the cooling surface of the twin rolls (α), etc.
The cooling effect decreases and becomes non-uniform, which adversely affects the properties of the thin plate (b).

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional situation, it is an object of the present invention to enable efficient and uniform cooling of molten metal.

[Means for solving problems]

The present invention concentrically loosely fits an internally coolable cylindrical outer mold into an internally coolable cylindrical inner mold,
A tundish equipped with a pouring nozzle is disposed above the inner and outer molds, and below the inner and outer molds, the iron pipe that is cast by passing between the inner and outer molds is cut and split in the longitudinal direction. The present invention relates to a continuous casting apparatus characterized in that a tearing blade is provided, and an expanding roll for expanding the torn iron pipe is arranged below the cutting blade so as to be expandable and retractable.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Figures 2 and 5 show an embodiment of the present invention, in which a cylindrical inner mold (2) capable of internal cooling is attached to the lower end of a cylindrical support (1). A cylindrical internally coolable outer mold (3) is arranged around the outer periphery of the mold so that a gap G equal to the thickness of the thin plate (4) to be cast is formed between the inner and outer molds (2) and (3). An annular tundish (5) is provided around the cylindrical support (1) above the inner and outer molds (2) (3).
5), nozzles (6) for pouring metal into the annular gap G are arranged as required on substantially the same circumference.

A cutting blade (7) is provided below the inner and outer molds (2) (3) in a direction perpendicular to the axial direction of the inner and outer molds (2) (3), and the annular gap G is The outer periphery of the cast iron pipe (8) can be cut in the axial direction, and a bar (9) is installed below the cutting blade (7).
Expanding rolls a◇, which are made up of a plurality of rolls QO arranged in series, are arranged in a V-shape on the left and right, and piston rods a3 of the hydraulic cylinder for corrugated sheet (2) are installed at both ends of each expanding roll α→. The tip of each expansion roll a◇ is pivotably mounted so that the opening degree of each expansion roll a◇ can be adjusted by the amount of protrusion of the piston rod α■ of each plate expansion hydraulic cylinder (2), and the iron pipe (8) A holding device a< having a semicircular arc cross section is provided on the side opposite to the tearing and expanding portion.

With the above configuration, the molten metal is transferred from the molten metal pot (c) into the tundish (5), and from the nozzle (6) of the tundish (5), the inner mold (2) and the outer mold (3) are moved.
When molten metal is poured into an annular gap G formed by The iron pipe (8) is cast as a cylindrical iron pipe (8), and the iron pipe (8) is cut and torn in the longitudinal direction by a lower tearing blade (7). The iron pipe (8) torn in the longitudinal direction is spread out by an expansion roll αη, and further bent at a substantially right angle below the expansion roll αp to form a horizontal thin plate (4).

When the thin plate (4) is pulled out while continuously pouring metal in this way, the cylindrical cast iron pipe (8) is torn and expanded into a flat plate, and the thin plate of the desired thickness is continuously produced. can get.

It should be noted that the continuous casting apparatus of the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

〔Effect of the invention〕

As described above, the continuous casting apparatus of the present invention exhibits various excellent effects as described below.

(I) Since the molten metal is cooled in a cylindrical shape by the inner and outer molds, the shrinkage of the molten metal during cooling is restrained by the inner molds, resulting in high cooling efficiency and a uniform cooling effect.

(I[) Since the inner and outer molds can have a fixed structure, it is easy to provide an internal cooling structure.

I Can be made smaller.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional twin-roll continuous casting machine, Fig. 2 is an explanatory diagram of a continuous casting apparatus of the present invention, and Fig. 3 is an explanatory diagram of the continuous casting machine of the present invention.
It is a 1l-III direction arrow view. (2) is the inner mold, (3) is the outer mold, (4)
is a thin plate, (5) is a tundish, (7) is a cutting blade,
(8) is an iron pipe, (b) is an expanding roll, (2) is a hydraulic cylinder for corrugated sheets, and α fathom is a holding device.

Claims (1)

[Claims] 1) A cylindrical outer mold that can be internally cooled is loosely fitted concentrically into a cylindrical inner mold that can be internally cooled, and a tundish equipped with a pouring nozzle is disposed above the inner and outer molds, A tearing blade is provided below the inner and outer molds for longitudinally cutting the cast pipe that is cast by passing between the inner and outer molds, and further below the tearing blade, the torn cast pipe is expanded. A continuous casting device characterized in that expanding rolls are arranged to be expandable and contractible.