JPS5947048A - Drum type continuous casting device for thin sheet - Google Patents

Abstract

PURPOSE:To provide a titled device which improves the quality of a billet with high productivity and stability by the constitution wherein side dams having a suitable curved surface of circular arc shape are installed in sliding contact with the inside lateral surfaces of the flangs of a flanged rotary drum to regulated the solidified shell on the flange surface. CONSTITUTION:A pair of side dams 9 are provided slidably with the outside lateral surfaces at both ends of a water-cooled cylindrical rotary drum 1a and the inside lateral surfaces of the flanges 2 on both sides of a water-cooled flanged rotary drum 1b. The surfaces of the side dams 9 facing to the drum 1b are formed to the curved surface of the circular are shape having the radius R (R>r+d) larger than the sum of the radiums (r) of the drum 1b and the spacing (d) between both rotary drums. The part of the solidified shell 11 formed on the inside lateral surfaces of the flanges 2 is just crushed slightly to the width of the spacing d and is prevented from forming wrinkles at the ends. There is no penetration of the molten steel from the spacing between the flanges 2 and the drum 1a and the position of meniscus 7 can be made higher, whereby the stabilize and productivity of the operation are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a drum-type continuous thin plate casting apparatus.

A conventional drum-type continuous thin plate casting apparatus is usually constructed as shown in FIGS. 1 and 2. 1a in those figures
1 is a water-cooled cylindrical rotating drum, and the rotating drum 1a is driven and rotated in the direction of the arrow by a drive source (not shown). 1h is a water-cooled rotating 1' ram with 7 flanges with flanges 2 on both ends, and a rotating drum 1h with 7 flanges.
is such that its rotational axis is parallel to the rotational axis of the cylindrical rotating drum 1a and between the outer circumferential surface of the rotating drum 1a.
It is installed so that a gap S forming a casting mold is formed 1, and is driven and rotated in the direction of the arrow at the same circumferential speed as the cylinder-shaped rotating drum 1a by a driving piece (not shown). It has become. 2+7 is cylindrical rotation 1・ram 1
The gap between the outer end surface of a and the inner surface of flange 2 of flange rotation 1-ram 1h (usually about Q, 2rnln
), 6 is a tanditshu, 4 is its nozzle, and through the same nozzle 4, the molten metal in the tanlite/- 6 enters the gap (mold) S between the cylindrical rotating drum 1σ and the flanged rotating drum 1h. The water is poured continuously,
The molten metal poured into the mold j-i is cooled by a water-cooled cylindrical rotating drum 1σ and a water-cooled flange-type rotating drum 1b to form a solidified shell, which is %j of the width d of the mold S.
It becomes a piece 5, which is pulled out by a pulling pinch roll 6, as shown on the right. Note that the reference numeral 7 in FIG. 1 indicates a meniscus (the surface of the molten metal in the mold section).

The above-mentioned conventional drum type continuous board 7, 41. H production strokes,
The molten metal that comes into contact with the flange 2 of the flange rotating drum 1a is solidified to the scum 7 due to the cooling effect of the flange 2, and a Y-shaped solidified shell 8 is formed in the first filter.

(Refer to Fig. 4) The end part becomes a solidified shell with a width A with 7 meniscus parts, and as both 1-゛lam 1a, 'I, bσ) rotate, it is pressed to a thickness of width (t). Because
The ends of the slab 5 are wrinkled. In order to increase the productivity of the equipment, it is necessary to increase the contact length l (Fig. 6) with the bath water (slab), but for this purpose, -13"" r +
The relationship between θ (/, -dashi r is flange version tiger giant'! + )' ram θ) radius) /), and the center fire that increases γ or increases θ is (Riroga, but r If you make it bigger,
b''-, l-1 from nozzle 4, the boiling water becomes too thick, the soil becomes thicker, θ is greatly changed, the difference between /I and d becomes larger, and the end of slab 5 Wrinkles/] - There are 7 lees that are exacerbated by the drawbacks of wrinkles and wrinkles. In addition, due to the difference in thermal deformation between the conventional device li circle 1 raku-shaped rotating drum 1a and the flanged rotary drum A i b, the gap 2a becomes large, molten metal enters the core part I7, and the drum becomes unable to rotate. It also had the disadvantage of causing operational problems such as drying.

The present invention has been proposed with the aim of providing a drum-type continuous casting device that eliminates the problems and shortcomings of the conventional devices mentioned above, improves productivity, and ensures stable operation. A drum-type thin plate continuous casting machine (C and the outer circumferential surface of both ends of the cylindrical rotating drum;
A pair of side gums are installed so as to be able to slide on the inner surfaces of the flanges on both sides of the rotating drum with flanges, and the surfaces of the side dams facing the rotating drum with flanges are aligned with the radius of the rotating drum with flanges and the circumferential rotation 1. It is similar to the drum-type 719-plate assembly machine, which is characterized by being formed of an arcuate curved surface with a radius larger than the sum of the width of the gap between the drums.

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in FIGS. 5 to 7 (Iel).

In those figures, 1α is a cylindrical rotating pyrano 1.1h is 7
Lunge 2 has a flange with a rotating drum.

+i't Jj'i on those parts side, action and phase 17
The related grooves C of No. 1 are almost the same as those of the conventional device described above. (The same sign divided by the same sign for one part of even snow). ) 9.9 is the cylindrical rotating drum 1 (the outer peripheral surface of both 14+1i parts of L and both end flanges 2 of the flanged rotating drum 1/I)
The side dams 9, 9 are slidably disposed on the inner surface of the cylindrical rotary 1.
-' The outer peripheral surface of both ends of the ram 1 and the inner surface of the flange 2 at both ends of the ram 1h. There are 46 circular arc curved surfaces with radius I (λ') facing the outer circumferential surface of , and the size of the radius 1't is equal to the radius γ of the flanged rotating drum 1h, both drums 1α, It is set slightly larger than the sum of the width d of the gap (mold part) between 1b.

In other words, 1(>τ+d).The material of the side dam is, for example, steel or a refractory material in the case of Ae molten metal, and a fireproof material is used in the case of molten steel.

Figure 8 (aj, (/+1, ICI,
The six Ji integral sides of the dam 90 are shown in Fig. 8 (the part not shown in al is a normal example, and Fig. 8 (the part shown in /+1 is an end part for strength considerations)9. 8th
The one shown in the figure (, ?l) is the heater 1 connected to the power supply E.
An example of embedding 2.

In this example, at the start of operation, the molten metal is preheated to near the solid temperature. It is characterized by:

One embodiment of the device of the present invention is composed of a water-cooled cylindrical rotating drum 1σ, a water-cooled drum 1, a ram 1b, a flange 2, and a dam 9. The mold part to be heated is drained by 5N, and the molten metal (''-1
The solidified shell 11 (
(Fig. 6), but solidification hardly or not progresses at all from the contact surface with the material 9. Then, as shown in FIG. 7, the solidified shell G on the contact surface with the flange 2 is pulled out along the side gum 9 while developing without being deformed as the rotating drum 1h rotates, forming a cylindrical rotation 1. It comes into contact with the ram 1a and is slightly crushed from the width h' to the width d to become the slab 5. In this case, the dam 9 is only in contact with the cylindrical rotation 1, the ram 1a and the flange 2. That is, since the side dam 9 only contacts the two straight surfaces, the rotating drums 1a and 1/I
Even if there is a difference in thermal expansion between the drums or a change in the drum gap (t), even if it is only 1゛, the contact between the two sides is always maintained: J!
+'``C''# Therefore, the gap between the flange 2 and the outside of the circular rotating drum 1a does not become too thick. ,
1 drafuru is light/l・1i)+, and it is kept. Also, Zuid 9 Dam 9 72724 July 1TI11shi, 1.
Radius H, 7 of the curved surface facing the circumferential surface of ram 1/)
:, the radius γ of the flange 111Jζ drum 1/I,
The solidified shell is set larger than the sum of the width d of the gap between both drums. (-Francy) Since the contact length p' with the rotating drum 1h can be increased, the stability is improved.Furthermore, the sagging of the end of the slab 5 is from 1 width h' to the width d. This improves the quality of the slab compared to the conventional method.Furthermore, the meniscus 7 is widened, making it possible to perform pouring without causing flashing, and therefore no quality defects occur on the surface of the slab.

Since the device of the present invention has the above-described configuration and operation, the present invention eliminates the problems and shortcomings of the conventional device described above.1. The present invention has practical effects in that it is possible to realize a drum-type continuous thin plate casting apparatus that can improve productivity and operate stably.

[Brief explanation of the drawing]

1 to 6 are schematic explanatory diagrams of a conventional device.
The figure is a side view, Figure 2 is a sectional view taken along the IF-]J line in Figure 1,
FIG. 3 is a line sectional view of III-11 in FIG. 5 is a side view, FIG. 6 is a sectional view of Vl-Vl +lt'4i in FIG.
(1)l. fCl is the remaining 1 tile and 6 diagrams of various specific examples of side guts. 1a: Cylindrical rotating 4-lead ram, 1h: Rotating drum with flange, 2: Flange, 7: Meniscus, 9: Zyde dam, r: Rotating 1-'ram with flange σ) radius, d:
1. 'Width of the gap (mold) between the rams, It: The radius of the curved surface facing the outer peripheral surface of the side gum. Sub-Agent Patent Attorney Italy iJM ＞tilF
(2 others) Figure 3 Haku Figure 6

Claims (1)

[Claims] 2 water-cooled cylindrical rotating drums, 1 rotation of water-cooled Francie
In a drum-type continuous thin plate casting apparatus that continuously casts thin plates by continuously pouring molten metal into the gap (casting part) between the cylindrical rotating 1-ram and the ram, A pair of side dams are slidably installed on the outer peripheral surfaces of both ends and the inner surfaces of the flanges on both sides of the flanged rotating drum, and the surfaces of the side dams that face the flange and the rotating drum are arranged so that the sides of the side dams are connected to the radius of the flange and the rotating drum. 1. A 1-ram continuous thin plate casting apparatus characterized in that it is formed of an arcuate curved surface having a radius larger than the width of the gap between the two rotating drums.