JPH0320033Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a moving mold type continuous casting machine equipped with two sets of endless track type moving molds facing each other.

[Prior Art] As shown in FIG. 2, for example, a continuous casting machine of this type has a mold block group 2 in which a large number of mold blocks 1 are connected in an endless track manner as a moving mold of an endless track type.
Two sets of mold block groups 2 are mounted opposite each other, and these two sets of mold block groups 2 are driven to rotate in directions of arrows A and B opposite to each other. The area where these mold block groups 2 face each other vertically in the figure is the casting area, and in this casting area, the mold blocks 1 adjacent to each other on the left and right in the figure in each casting mold block group 2 are closely spaced. A casting space is formed between the mold blocks 1 in the mold block group 2 from left to right in the figure. A nozzle 4 connected to the tundish 3 is inserted into the left side of this casting space, and molten metal is poured from the nozzle 4, and this molten metal is cooled by the mold block 1 forming the casting space. It is continuously drawn out as a cast piece from the right side in the figure. In this way, this continuous casting machine performs continuous casting using the movable mold block 1 as a movable mold.

In such a continuous casting machine, in order to prevent melt leakage between the nozzle 4 and the mold block 1, it is necessary to manage the positional accuracy between the nozzle 4 and the mold block 1, that is, to control the positional accuracy between the nozzle 4 and the mold block 1. It is extremely important to manage the absolute positional accuracy of each of the 1 and their relative positional accuracy. However, the nozzle 4, which is made of a refractory material, tends to have its own dimensions distorted or bend due to the weight of the molten metal passing through the nozzle and the thermal influence.

Conventionally, in such a continuous casting machine, nozzle 4
was simply cantilevered by the tundish 3 by its base end. In other words, no restraining force was applied to the middle part of the nozzle 4 from the outside to suppress its deformation. This is partly because the space at the entrance of the molten metal to the casting space is narrow, and it is difficult to create room for extra mechanisms within that narrow space.

[Problems to be solved by the invention] Conventionally, no restraining force is applied to the middle part of the nozzle 4 from the outside, so the nozzle 4
It was easy to bend, especially the middle part. Therefore,
In some cases, the nozzle 4 could not be inserted between the mold blocks 1, which are movable molds, or a gap was created in the insertion portion, causing a leakage of hot water. Furthermore, in the worst case, there was a risk that the nozzle 4 would be damaged.

[Means for Solving the Problems] The moving mold type continuous casting machine of this invention is equipped with two sets of endless track type moving molds facing each other, and these moving molds are driven to rotate in opposite directions. In a moving mold type continuous casting machine that performs continuous casting by inserting a nozzle connected to a tundish of molten metal into the casting space formed by mutually opposing casting molds and pouring molten metal into the casting space from this nozzle. , a plurality of rod-shaped supports are installed on the base side of the casting machine to suppress deformation of the nozzle by sandwiching the nozzle in contact with the circumference of the part between the tip of the nozzle and the tundish; It is characterized by being provided extending in a direction perpendicular to the direction.

[Function] The moving mold type continuous casting machine according to this invention uses a plurality of rod-shaped supports installed on the base side of the casting machine so as to be perpendicular to the length direction of the nozzle, so that the distance from the tip of the nozzle to the tundish is controlled. The deformation of the nozzle is suppressed by sandwiching the part between the nozzle and the movable mold, thereby suppressing the deformation of the nozzle in the narrow space at the entrance of the molten metal to the casting space, and improving the positional accuracy between the nozzle and the movable mold. To facilitate management and prevent problems caused by nozzle deformation.

[Example] Hereinafter, an example of this invention will be described based on FIG. 1. Note that the same parts as those in the conventional example described above are given the same reference numerals, and the explanation thereof will be omitted.

According to this invention, deformation of the nozzle 4 is suppressed by sandwiching the nozzle 4 from above and below on the base side of the casting machine (not shown) in contact with the circumference of the part between the tip of the nozzle 4 and the tundish 3. A rod-shaped support 5 is provided. In this example,
Both ends of each of four round bar-shaped supports 5 are fixed to the base side of the casting machine, and these supports 5 are provided so as to extend in a horizontal direction perpendicular to the length direction of the nozzle 4. There is. Two of the four supports 5 are in contact with the lower side of the nozzle 4 so as to support it.
The other two are in contact with the upper side of the nozzle 4 so as to press it down from above. Therefore, in the narrow space at the entrance of the molten metal to the casting space, only the intermediate portion of the support body 5, which occupies a small space, exists.

Next, the effect will be explained.

The four supports 5 sandwich the nozzle 4 from above and below to restrain it. Therefore, the deformation of the nozzle 4 is suppressed, and problems caused by the deformation of the nozzle 4, such as the nozzle 4 not being able to be inserted between the mold blocks 1, or a gap being created in the insertion part, which causes melt leakage, can be avoided. problems are avoided before they occur. Moreover, since only the intermediate portion of the support body 5, which occupies a small space, exists in the narrow space at the entrance of the molten metal, there is no particular problem with the arrangement of the support body 5, and the narrow space can be easily occupied. Since there is no fear that the support 5 will have a negative effect on peripheral equipment, the support 5 can be installed in a position sufficiently close to the entrance of the mold space, and as a result, deformation, especially at the tip end of the nozzle 4, can be prevented. It has become sufficiently restrictive. Moreover, since the support body 5 is a rod-shaped body, the contact surface between its middle portion and the nozzle 4 is small. This is extremely advantageous in terms of the performance of the casting machine itself. That is, in the nozzle 4,
It is required to maintain the molten steel at a high temperature until just before it enters the casting space, and in this respect, the small contact area between the nozzle 4 and the support 5, that is, the heat transfer area between them, is This is because the amount of heat escaping from the nozzle 4 to the support 5 side is reduced, which is advantageous in maintaining the high temperature state of the nozzle 4 itself.

Note that the number and arrangement form of the supports 5 are not limited to the above embodiments, and for example, a large number of supports 5 may be used.
may be arranged so as to be in contact with the top, bottom, and side surfaces of the nozzle 4, so that the nozzle 4 is sandwiched not only from above and below but also from both sides. Further, the support body 5 may be a rod having various shapes other than a round rod shape.

Further, the support body 5 may be fixed directly to the base side of the casting machine, or may be fixed to the base side of the casting machine only when the nozzle 4 is set between the mold blocks 1. Alternatively, the nozzle 4 may be provided on a moving table that moves the nozzle 4 in the insertion direction so that the nozzle 4 moves together with the nozzle 4. In this latter case, since the moving table is installed on the base of the casting machine,
The support 5 is indirectly installed on the base of the casting machine via the movable table.

Furthermore, in the above embodiment, the movable mold is constituted by the mold blocks 1 connected in an endless track type, but the movable mold is constituted by an endless belt instead of the mold blocks 1. You can.

[Effects of the invention] As explained above, the moving mold type continuous casting machine according to this invention has a structure in which the nozzle is sandwiched between the nozzle tip and the tundish on the base side of the casting machine. Since the structure is such that multiple rod-shaped supports that restrain deformation are installed perpendicular to the length direction of the nozzle, these supports should be installed at a position sufficiently close to the entrance of the molten metal into the casting space. Therefore, the deformation of the tip of the nozzle can be reliably restrained, and as a result, the positional accuracy between the nozzle and the movable mold can be easily managed, Problems caused by deformation of the nozzle can be avoided.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of essential parts of an embodiment of this invention, and FIG. 2 is a schematic side view for explaining a conventional moving mold type continuous casting machine. 1... Mold block, 2... Mold block group,
3...Tendish, 4...Nozzle, 5...Support.

Claims (1)

[Scope of utility model registration request] Two sets of endless track-type moving molds are installed facing each other and driven to rotate in opposite directions, and a nozzle connected to a tundish of molten metal is placed in a casting space formed in a casting area where these moving molds face each other. In a moving mold type continuous casting machine that performs continuous casting by inserting a A continuous movable mold type, characterized in that a plurality of rod-shaped supports are provided extending in a direction perpendicular to the length direction of the nozzle to suppress deformation of the nozzle by contacting the circumference and sandwiching the nozzle. Casting machine.