JPH0422660B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a block moving mold type continuous casting machine that prevents the speed of the block moving mold from changing.

[Prior Art] Generally, a moving mold type continuous casting machine forms a mold by connecting a large number of block molds in an endless track, and creates a mold space by combining the molds vertically, and opens one opening in the mold space. Insert the tandate nozzle into the
Molten metal is supplied from the tandate nozzle, and the mold and solidified slab are moved toward the other open end to perform continuous casting. There is a moving mold type continuous casting machine.

For example, the inclined moving mold type continuous casting machine is shown in Figs. 3 and 4.
As shown in the figure, a frame 5 is provided between the drive wheel 3 and the mold rotation track section 4 which are separated by a required interval, and guide rails 6 are fixedly installed above and below the frame 5. Two left and right chains 7 are connected in an endless chain, and a large number of clamps 9 with block molds 8, 8' fixed thereto are attached to the chain 7 via pins 10 to connect the block molds in an endless track. 10 guide rails 6
A guide roll 11 rotatably provided at the side end is placed along the side groove of the guide rail 6, so that the block mold moves on the track. A mold space 12 is formed by combining the upper and lower parts of the endless track-shaped mold,
On the downstream side of the mold space 12 in the line direction, a brake wheel 13 such as a sprocket that meshes with the chain 7 on the casting direction side, that is, on the outward path side, is installed on the left and right sides of the shaft 15.
The shaft 15 is fixed to the frame 5 through a bearing 16, and the end of the shaft 15 is connected to a drive device 18 such as a hydraulic motor through a coupling 17, and the drive device 18 drives the brake wheel. 13 in the opposite direction to the feeding direction of the chain 7, the block molds 8, 8' are pushed upstream in the direction of movement of the block molds 8, 8' via the clamp 9, and the block molds 8, 8' are moved. By applying a brake to the adjacent block molds 8, 8
and 8', 8' to improve adhesion. When the molten metal poured into the tundish 1 is supplied from the upstream side of the mold space 12 from the tundish nozzle 2, the molten metal flows between the upper and lower block molds 8, 8', which are positioned without any gaps, without leaking between them. It is cooled and solidified, and then taken out of the machine from the downstream side as a slab.

[Problems to be Solved by the Invention] However, when the lower book mold 8 passes the brake wheel 13, the braking force by the brake wheel 13 is released, and the tension force exerted by the drive wheel 3 through the chain 7 is released. acts, and the mold rotates around the mold rotation track section 4 and tries to return to the drive wheel 3 side again.

At this time, when the lower block mold 8 rotating around the mold rotation orbit section 4 changes its direction from upward to downward, it shifts due to gravity, causing an instantaneous impact.
The constant speed of the endless track-shaped mold is exceeded, causing temporary speed changes at a constant pitch throughout the lower mold, which has an adverse effect on the slab that is in the process of forming a solidified shell.

In view of the above-mentioned circumstances, it is an object of the present invention to prevent temporary speed changes when a block mold rotates around a mold rotation orbit.

[Means for Solving the Problems] The present invention provides an endless track type continuous mold casting machine in which a large number of block molds are endlessly connected between a drive wheel and a mold rotation drive unit spaced apart from each other by a predetermined distance.
arranging the endless track-shaped molds one above the other so that opposing surfaces move in the same direction from the drive wheel side to the mold rotation track side to form a mold space, and supplying molten metal to the upstream side of the mold space, In the continuous casting machine that cools and solidifies molten metal using block molds to cast slabs, a brake is applied to the block molds near the mold rotation orbit on the slab outlet side in the return path of the lower mold. It is characterized by the provision of a brake wheel that increases adhesion and prevents free fall.

[Operation] When the lower block mold rotates around the rotating track on the slab exit side, the brake wheel minimizes the distance between the block molds, so the molds rotate smoothly without increasing the distance between them. The low speed of the endless track mold is not disturbed.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are explanatory diagrams of an embodiment of the present invention.

1 is a tundish, 2 is a tundish nozzle, 3 is a drive hole, 4 is a mold rotation track, 5 is a frame, 6 is a guide rail, 7 is a chain, 8
is the block mold, 9 is the clamp, 10 is the pin, 1
1 is a guide roll, and 12 is a mold space.

A shaft 22 connected to a drive device 20 via a coupling 21 is disposed in the vicinity of the mold rotation orbit 4 on the return path of the lower mold 19 via a bearing 23 in a direction perpendicular to the moving direction of the mold 19. , the axis 2
A free fall prevention wheel 24 such as a sprocket is fixed to each end of the chain 2 by a key 25 so that it can mesh with the chain 7 on both sides, and the free fall prevention wheel 24 is moved by the drive device 20 in a direction opposite to the feeding direction of the chain 7. It is designed so that it can rotate in any direction.

With the above configuration, when the free fall prevention wheel 24 is rotated by the drive device 20 via the coupling 21 and the shaft 22 with a predetermined output in the direction opposite to the feeding direction of the chain 7, the free fall prevention wheel 24 24 serves as a resistance for feeding the chain 7, and the chain 7 is chained via a clamp 9 on the mold rotation track 4, and each block mold 8 is fixed to the chain 7 via a clamp 9.
The mutual spacing between 〓 becomes tight.

Therefore, the block molds 8'', which are moved downstream with improved adhesion on the outward path of the mold 19, are prevented from loosening their mutual spacing even when the mold rotation orbits freely fall due to the brake wheel 24 provided on the return path. It moves around the mold rotation orbit part 4 while smoothly changing its posture from upward to downward.

As a result, it is possible to prevent the block mold 8 from falling freely on the mold rotation track section 4, and it is possible to perform casting at a stable speed without causing disturbances in the constant speed due to the impact caused by the free fall. can.

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

[Effects of the Invention] As described above, according to the block moving mold type continuous casting machine of the present invention, there is a structure in the vicinity of the mold rotation orbit on the return path of the lower mold, which improves the adhesion of the mold during the outward path and prevents free fall. Since a wheel is provided to prevent the mold from falling, there is no gap between the block molds around the mold rotation orbit, preventing free fall, ensuring mold adhesion on the outward journey, and allowing the block molds to run at a constant speed. As a result, excellent effects such as stable casting can be achieved.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of an embodiment of the present invention, Fig. 2 is a detailed view of the part shown in Fig. 1, Fig. 3 is an explanatory diagram of a general moving mold type continuous casting machine, and Fig. 4 is a diagram of the third embodiment. FIG. In the figure, 1 is a tundish, 2 is a tundish nozzle, 3 is a drive wheel, 4 is a mold rotation track, 6 is a guide rail, 7 is a chain, 8 is a block mold, 13 is a brake wheel, 18, 20
19 is a drive device, 19 is a mold, 22 is a shaft, and 24 is a free fall prevention wheel.

Claims (1)

[Claims] 1. In an endless track-type moving mold continuous casting machine in which a large number of block molds are endlessly connected between a drive wheel and a mold rotation track section separated by a required interval, the track-shaped molds are placed so that the opposing surface is on the drive wheel side. A mold space is formed by disposing the molds vertically so as to move in the same direction from the mold to the mold rotation orbit side, and molten metal is supplied to the upstream side of the mold space, and the molten metal is cooled and solidified by a block mold to cast a slab. A brake wheel is provided in the vicinity of the mold rotation orbit on the slab exit side on the return path of the mold on the lower side of the continuous casting machine to apply a brake to the block molds to improve adhesion between the block molds and prevent free fall. A block moving mold type continuous casting machine characterized by the following.