JPS62207536A - Mold for block type continuous caster - Google Patents

Abstract

PURPOSE:To obtain concrete cooling means for a separate type cooling block by separating the cooling block into a width direction, contacting each cooling block piece separably and arranging cooling hole connecting to each block piece mutually. CONSTITUTION:Cooling water is flowed in a cooling passage 17 in the cooling blocks through a nipple 16, and is gone round in the cooling blocks, to produce a casting sheet as growing a shell at contacting face with the block surface. When the cooling block is brought into contact with the molten metal, the contacting face 6 side is expanded by heat, but as any restriction does not exist within the cooling block piece 5, the cooling block piece 5 and a holding piece 8 are shifted relatively toward the width direction by heat expansion size as overcoming to pressing force of a compression spring 13. As a sealing material 15 is fixed as deforming more than expansion of the block piece 5, the seal between the cooling holes 14, 14 is assured. As the contacting face side of the cooling block piece 5 is freely expanded and shrinked at heat- changing, development of large thermal stress is prevented and any permanent strain does not remain.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mold for a block type continuous casting machine in which the mold is composed of cooling blocks connected in an endless chain.

[Prior Art] In block type continuous casting equipment, as shown in FIG. 3, cooling blocks 1 are connected in an endless chain, and the cooling block chain 2
A mold is constructed by arranging the cooling block chain 2 such that it circulates around the cooling block chain 2 so as to form a straight wall 3 over a required length, and with the straight walls 3 facing each other. The cooling block 1 is rotated in synchronization with the casting speed, and a shell is gradually grown on the surface of the cooling block 1 during casting.

In such block-type continuous casting equipment, the width of the mold is usually about 1111 to 1.5 m, and therefore the length of the cooling block constituting the mold in the width direction is significantly longer than its cross-sectional area. In addition, since the inner surface of the cooling block comes into contact with the high temperature water, an extremely large thermal gradient occurs between it and the outer surface.
Due to the thermal distortion, the cooling block has several tens of CIs of curling at both ends, causing a situation where the cooling block no longer functions as a mold. Furthermore, since the thermal stress greatly exceeds the yield point, large permanent deformation remains and repeated use is impossible.

Therefore, in order to solve the above-mentioned problems, it has been proposed that the cooling block is divided as required in the width direction and the divided cooling block pieces are brought into close contact with each other so that they can be separated.

[Problems to be Solved by the Invention] In view of the above-mentioned circumstances, the present invention provides a concrete cooling means for a split-type cooling block, and attempts to realize a mold for a continuous casting machine using the split-type cooling block. .

[Means for Solving the Problems] The present invention provides a mold for a block-type continuous casting machine in which cooling block chains in which cooling blocks are endlessly connected and are arranged around guide wheels are disposed facing each other. The cooling block is divided as required in the width direction, each of the divided cooling block pieces is brought into close contact with each other so that they can be separated, mutually continuous cooling holes are bored in each cooling block, and a sealing material is provided between the cooling holes. It is characterized by being watertight.

[Function] Cooling water flows through the cooling holes to cool the cooling block,
In addition, the thermal deformation generated in the cooling block is absorbed by each seal portion, thereby maintaining the watertight state of the cooling hole.

[Example] The present invention will be described in detail below with reference to the drawings.

In FIG. 1, the cooling block 1 is divided into a plurality of cooling block pieces 5 in the width direction, and the plurality of cooling block pieces 5 are held between holding pieces 6.

The molten metal contact surface 7 of the cooling block piece 5 is made slightly wider in the width direction and the circumferential direction, and an escape gap is formed on the opposite side. Therefore, the end faces of the cooling block pieces 5 in the width direction and circumferential direction on the molten metal side reliably contact the adjacent block pieces. Through holes are made in the cooling block piece 5 and the holding piece 8, and the bushings 7.9 are inserted therein. Further, a presser plate 10 is arranged on both sides of the presser piece 8, and the presser plate 10, the presser piece 8, and the cooling block 1 are connected to the guide rod 1.
1 to make it fit through. The guide rod 11 is fitted into the holding piece 8 and the cooling block 1 via bushings 7.9, and is slidable in the axial direction. A nut 12 is screwed onto both ends of the guide rod 11 to fix the presser plate 10, and a compression spring 13 is interposed between the presser piece 8 and the presser plate 10.
, the cooling blocks 5 are brought into close contact with each other.

Further, cooling holes 14 having the same axis are formed in each of the cooling block pieces 5 and the holding pieces 8 so as to be in a continuous state in close contact with each other. A sealing material 15 having a deformability greater than the expansion amount of each cooling block piece 5 and presser piece 8 is provided at one end of the cooling hole 14, and the sealing material 15 deforms more than the expansion amount of each block when each block is in close contact with the other. do as you like.

Thus, a cooling path 17 formed by the cooling hole 16 is connected to a cooling source (not shown) through the nipple 16 fixed to the holding piece 8.
Connect.

Although not particularly shown in the drawings, the blocks are mutually prevented from rotating.

A mold is formed by connecting the cooling blocks 1 constructed as described above into an endless chain.

By circulating cooling water through the cooling block 1 having the above configuration through the nipple 16 to the cooling path 17 and rotating the cooling block 1, a shell grows on the surface of the cooling block 1 and is sent along with the movement of the cooling block 1. A piece is extracted.

Also, when the cooling block 1 comes into contact with molten metal, the contact surface 6 side expands thermally, but there is nothing to restrain the cooling block pieces 5 from each other, and when thermal expansion occurs, each cooling block piece 5 and the holding piece 8 are pressed by the compression spring 13. It overcomes the pressure and moves relative in the width direction by the amount of thermal expansion.

However, since the sealing material 15 described above is installed by being deformed by more than the expansion amount of the block piece, each cooling hole 14.14
Sealing performance between the two is guaranteed. Furthermore, although the gap on the side of the opposite contact surface becomes larger, no warping occurs, the flatness of the contact surface 6 is maintained, and the compression spring 13 ensures its adhesion.

Since the contact surface side of the cooling block piece 5 can freely expand and contract in response to thermal changes, generation of large thermal stress can be prevented and no permanent distortion will remain.

FIG. 2 shows another embodiment, in which a protruding pipe 18 is formed at one end of the cooling hole 14, facing the protruding pipe 18 of the cooling hole 14,
A fitting hole 19 into which the protruding tube can be fitted is bored on the side where the protruding tube is fitted.

Furthermore, a groove 20 is carved on the inner circumferential surface of the fitting hole 19, and rIII
A sealing material 15 such as an O-ring is fitted into 20.

In this embodiment, even if the cooling block 1.1 thermally expands and the apparent distance between the cooling blocks changes, the change in distance is absorbed by the sliding between the protrusion pipe 18 and the fitting hole 19, and the distance between each block is The watertightness of the cooling holes is not impaired.

[Effects of the Invention] As described above, according to the present invention, a cooling method for a split cooling block type mold is realized, and this greatly contributes to the realization of a block type continuous casting machine.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a partial sectional view of another embodiment of the same, and FIG. 3 is a schematic diagram of a block type continuous casting machine. 1 is a cooling block, 5 is a cooling block piece, 8 is a holding piece,
13 is a compression spring, 14 is a cooling hole, 15 is a sealing material, 11
indicates a cooling path. Figure 1 Figure 2

Claims (1)

[Claims] 1) In the mold of a block-type continuous casting machine, which consists of a cooling block chain in which cooling blocks are endlessly connected and arranged around guide wheels facing each other, the cooling blocks are divided as required in the width direction; The cooling block pieces are brought into close contact with each other so that they can be separated, and mutually continuous cooling holes are bored in each cooling block.
A mold for a block type continuous casting machine characterized by providing a sealing material between cooling holes to make it watertight.