JPS6076256A - Casting mold with continuous casting plant of twin mold roller type - Google Patents

Abstract

PURPOSE:To provide a titled casting mold which prevents wrinkling on both side edges of a billet and prevents breakout by using a heat insulating material to constitute the upper part of a pair of short side gates extending downward by passing through the spacing between twin mold rollers and by using cooling blocks having cooling water paths to constitute the lower part thereof. CONSTITUTION:A continuous casting device is formed of twin mold rollers 1, a pair of long side gates 5 disposed above said rollers and a pair of short side gates 13 extending downward by passing through the spacing between the rollers 1 from the end of the gates 5. A molten metal is supplied from a tundish nozzle 4 into the casting mold and the shell formed in the mold is drawn in the form of a billet 11 toward the arrow A direction. The part 13A of the gates 13 of such continuous casting device upper than the horizontal line running the axial center of the rollers 1 is formed of a heat insulating material to suppress the formation of the shell on the short side. On the other hand, the lower part 13B is formed of cooling blocks consisting of copper or the like having excellent heat conductivity and cooling water passages are provided therein to cool positively the lower part, thereby forming the shell on the short side.

Description

[Detailed description of the invention] '4. The present invention relates to a mold for Soilemor F roller cedar continuous casting equipment.

The outline of a continuous 9r production facility using a conventionally known NINMO-7 red roller will be explained with reference to FIG. 1V'C. (
1) are twin mold rollers approaching each other, (2)
(3) is a pinch roller and a guide roller that constitute a slab conveyance path extending downward from directly below both rollers (1);
4) is a tanditsch nozzle, (580) is a roller (1
) is a pair of long side weir and short side weir placed on the top.

In the above configuration, the molten metal (8
) is injected and the molten metal (8) is cooled by the cooling water supplied into the roller (1) to form a long side shell /l/ (9), and the short side weir (0) As shown in FIG.
The slab (b) is pulled out in the direction of the arrow.If the bath temperature contact surface of the short side flu (6) is half-sided, like that of min side N, (5J), then the short side 11111 shell Q
As the OIIi new piece 0υ is pulled out in the direction of the arrow, the twin mold roller (1) is pressed down, and the arrow changes from (L) to fJ+ as shown in Figure 2, creating the pulled out shape]). Wrinkles appear on the edges on both sides, making the item unattractive. Therefore, it is possible to use the short side weir (6) as a heat insulating material to cool the molten metal (8) in contact with the short side weir (6) to prevent the formation of a hearth side shell, but if you do this, There is a risk that the shell formation on both sides of the cast slab will be insufficient and breakout will occur.

Therefore, the present invention provides a mold for twin mold roller type buried casting equipment that solves this problem, and its features are twin mold rollers that are close to each other and It has a pair of long side weirs arranged, and a pair of short side weirs that extend downward from the ends of the long side weirs through between the twin mold rollers, and the six short side weirs have a pair of short side weirs.
The upper part of the horizontal line passing through the axis of the twin mold rollers of the two weirs is made of ・T material, and the part below the horizontal line is made of heat-transfer-resistant cooling Glock. The reason is that a cooling water passage is formed in a circular cooling pronk circle. According to this configuration, since the short side shell cannot be formed on one side of the horizontal line passing through the axes of the twin mold rollers, wrinkles do not occur on both sides of the cast H. Below the horizontal line passing through the axis of the twin mold rollers, the boiling water is actively cooled by the cooling block at the bottom of the short side weir to form a hearth side shear, so breakouts are unlikely to occur. do not have.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 3 to 6. α葎 is a pair of short side weirs that extend downward from between the ends of the long side weir (5) through between the twin mold rollers (1), and is bounded by a horizontal line passing through the axis of the twin mold rollers t1). It is divided into an upper part (13A) and a lower part (13B). The upper part (13A) is formed of IJ'dr heating material, and the molten metal (8) in contact with this upper part (13A) is not cooled.
A heater shall be buried inside. Part 1 above (13B
) is formed by a cooling block U41 made of a copper alloy, and has a cooling water passage θω inside thereof. QQ
is the cooling water pipe connected to the cooling water passage Q~, and α is the steel outer skin.

In the above configuration, when the melt m (8) is injected into the mold (7), the long side shell /l/ (9) is formed by the roller (1), but it is in contact with the short side weir upper part (13A). Since the molten metal (8) is not cooled, a short side shell is not formed (d).Next, the arrow of the slab Uυ (long side shell by pulling out in the A1 direction)v(9) is moved to the roller (1). ), and the molten metal (3) in contact with the cooling block Q4) at the lower part of the short side weir (13B) is actively cooled to form the short side shell WJ. The cast slab Qυ on which the sheaves (9) have been formed in this way is pulled out while being supported by the hinch roller (2) and guide roller (3).

As stated above, according to the invention, the hearth side shell is not formed above the horizontal line Q that traces the axes of the twin mold rollers.
Never. Also, 1 of the fin mold' roller. l! l
Below the exciting horizontal line, the molten metal is extremely cooled by the cooling block at the base of the short side weir, and the short side 111
Since a 1i shell is formed, no break-at occurs, and furthermore, it is possible to cast the circular part of the shell in a state where it is not completely solidified (hard casting), and it is especially compatible with cylinder speed casting. There are advantages of

[Brief explanation of the drawing]

The first problem is a schematic explanatory diagram of continuous slab casting equipment using twin mold rollers, Figure 2 is a front view showing the state of formation of the hearth shell, and Figures 3 to 6 show an embodiment of the present invention. Figure 3 is a diagram of M111, Figure 4 is a plan view,
Fig. 5: 1-1 part traverse view, Fig. 6: M of the short side weir
It is a mt side view. (1)...twin mold roller, (5)...long side weir, <y>...mold, (8)...molten metal, scream...short side shell, Uυ...casting Piece, Q: 9 pa, short side weir, (1
3A)... Upper part of short side weir, (13B)... Lower part of short side weir, 041... Cooling block, o5... Cooling water passage agent Yoshihiro Morimoto Figure 1 Figure 2

Claims (1)

[Claims] 1. Twin mold rollers approaching each other, a pair of long side weirs disposed on the rollers, and a pair extending downward from a part of the long side weirs through between the twin mold rollers. The short side of the weir and the horizontal line that traces the axis of the twin mold rollers of each short side weir are formed by thermal insulation, and the part below that horizontal line is made of heat conduction. The mold is formed by a cooling tube with excellent properties, and has a cooling front in a seven-fold type j-stop and a T-shape installation. ^