JPS5931417B2 - Continuous casting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous casting device that continuously produces plate-shaped ingots by pouring molten metal onto a continuously running endless belt and cooling and solidifying it (open belt continuous casting method). It is.

Conventionally, a device for continuously casting plate-shaped ingots has a rectangular parallelepiped or cube-shaped metal plate on both sides along the longitudinal direction of the top surface of an endless belt 1 that runs continuously, as shown in Fig. 1, for example. Side molds 4, 4 are provided in which blocks 2...... are connected in an endless manner with a wire rope 3, and the side molds 4, 4 are moved at the same speed as the endless belt 1 to form an ingot. A device is used that continuously casts the material while regulating the width of the material.

When a plate-shaped ingot 5 is produced using this casting apparatus, minute cracks occur along the central longitudinal direction of the ingot 5, and a continuous and sound ingot 5 may not be obtained.

The inventors investigated the cause of this and found that when casting a plate-shaped ingot 5 with a thickness to width ratio of 1:100, the above device cools the width direction more than the thickness direction. This is caused by the cooling rate from the width direction, that is, the large heat capacity of the side mold 4 made up of the metal blocks 2... It has become clear that in order to continuously obtain a healthy ingot 5, it is possible to reduce the cooling in the width direction to about one times the cooling in the thickness direction.

In addition, the side mold 4 has a large number of metal blocks 2...
Since the structure is such that the wire ropes are connected endlessly with wire ropes, accidents often occur in which the wire ropes become fatigued and break due to the bending stress repeatedly applied during running, and the operation must be stopped each time. I had to.

The present invention is the result of various research conducted in view of the above points, and has resulted in the development of a continuous casting apparatus that can stably obtain a healthy plate-shaped ingot over a long period of time.

That is, the present invention consists of an endless link in which a plurality of pairs of link members arranged in parallel at intervals are connected in an endless manner, and each pair of link members is made up of a horizontal piece and a vertical piece with both upper end corners cut out. A side mold is formed by fixing casting members each having an L-shaped cross section so as to connect them at the upper portions of their horizontal pieces, and providing a guide member for guiding the endless link so as to fit between the pair of link members. This is a continuous casting device in which side molds are provided in close contact with each other on both sides of the upper surface along the longitudinal direction of the endless belt.

The present invention will be described in detail below with reference to embodiments shown in the drawings.

FIGS. 2 to 5 show an embodiment of the present invention, and this continuous casting apparatus consists of a pair of link members 6a, 6a forming an endless link 6.・Mold members 1 having a rectangular cross-section are fixed to each other, and a guide rail 8 is fitted between the pair of link members 6a, 6a. A pair of side molds 9, 9 are provided in close contact with each other on both sides of the upper surface of the endless belt 1 along the longitudinal direction.

The endless link 6 includes a pair of link members 6a, 6a arranged in parallel at intervals, and a pair of adjacent link members 6.
A, 6a are sequentially connected via pins 10 in an endless manner.

Further, the pin 10 is provided with a roller 1 that rotates around the pin 10.
1 are attached to each of the link members 6a, and a plate-shaped attachment portion 13 having a bolt hole 12 perpendicular thereto is provided in the lower part of the link member 6a.

Further, the mold member 7 includes a pair of link members 6a, 6 arranged in parallel.
A is mounted using a horizontal piece 14 having a width larger than the width, and a vertical piece 15 having both upper end corners 15a, 15a cut out diagonally upward from a position at the same height as the center of the pin 10. Constructed of metal members.

Each pair of link members 6a, 6a constituting the endless link 6 is fixed to the upper part of the horizontal piece 14 of the mold member 7 by a bolt 16 at a mounting part 13 formed at the lower part thereof. It has a structure in which a plurality of mold members 7 are attached in a caterpillar shape all around the circumference.

Further, the endless link 6 is provided with a substantially C-shaped guide rail 8 which is fitted between the pair of link members 6a, 6a constituting the endless link 6 and comes into contact with the roller 11 attached to the pin 10. The endless link 6 is guided by the guide rail 8.

Further, the endless belt 1 is stretched between a drive roll 17 and an idle wheel 18 as shown in FIG.

The pair of side molds 9, 9 are placed on both sides along the longitudinal direction of the upper surface of the endless belt 1, with the horizontal pieces 14, 14 being in close contact with the endless belt 1, and the vertical pieces 15, 15 being in close contact with the endless belt 1.
The endless belt 1 and a pair of side molds 9, 9 for regulating the width of the ingot 5 constitute the entire mold.

In the figure, 19 indicates the molten metal, 20 indicates a tundish that continuously supplies the molten metal 19, and 21 indicates a cooling water injection device provided inside the wound endless belt 1.

However, in the continuous casting apparatus having the above structure, the drive roll 1
When the endless belt 1 is made to run by rotating the endless belt 7, the side molds 9°9 provided in close proximity thereto rotate and move at the same speed as the endless belt 1.

In this case, the portion of the side mold 9 that is in close contact with the endless belt 1 extends along the longitudinal direction of the side surface of the mold member 7...
Vertical piece 15 of ・・・・・・・・・
. . are in close contact with each other to form the side wall surface of the metal mold, and this side wall surface moves while being guided by the guide rail 8 as the endless belt 10 runs.

Further, the mold member 7 that has moved to the terminal end side of the side mold 9 rotates upward along the curved guide rail 8, and moves in the opposite direction to the running direction of the endless belt 10.

In this case, since both upper end corners 15a, 15a of the vertical piece 15 are diagonally cut out, the vertical piece 15 can rotate smoothly without hitting the adjacent vertical piece 15.

Lead, lead,
A molten metal 19 of aluminum or copper is sequentially poured, and the molten metal 19 is cooled by a cooling water injection device 21 provided on the endless belt 1 to continuously produce plate-shaped ingots 5.

In this case, the side mold 9 is composed of a mold member 7 having a cross-sectional shape with a small heat capacity, so that the cooling from the width direction of the ingot 5 is several hundredths of that from the thickness direction. As a result, a healthy ingot 5 can be continuously obtained without producing minute cracks.

- The present invention also provides a water-cooled roll (skin roll) 22 on the ingot delivery side of a pair of side molds 9, 9 arranged in parallel on the endless belt 1, as shown in FIG. It may be used as a part of the guide member to cool the ingot 5 from the upper surface and to adjust the thickness.

Further, in the one shown in FIG. 7, a pair of side molds 9°9 are arranged parallel to the upper surface of the endless belt 1, and the horizontal piece 14 of the mold member 7 having a cross-sectional shape is continuously formed. This is the side wall surface of the mold.

In the above embodiment, the side mold 9 was brought into close contact with the endless belt 1 so that it rotated in synchronization with the running of the endless belt 10, but a drive device was separately provided in the side mold 9. Anything is fine.

Further, although the guide rail 8 is used as the guide member, the present invention is not limited to this, and any member such as a gear or a pulley may be used as long as it guides the side mold 9 smoothly.

Furthermore, the endless belt 1 is not limited to the one provided below the side mold 9 to form the bottom surface of the mold, but may be one in which two endless belts 1, 1 are combined vertically to form the top and bottom surfaces of the mold.

Next, a specific example of manufacturing a plate-shaped ingot 5 using the apparatus of the present invention will be described.

Using an open belt type continuous casting machine as shown in Figures 2 to 5, the width is 350 mm under the conditions as shown in Table 1.
, a plate-shaped ingot 5 having a thickness of 5 myn was continuously produced.

In this case, the horizontal piece 14 forming the mold member 7 has a width of 50 mm.
, 50.8 m 7 ft long and 3.2 mm thick, and the vertical piece 15 is 30 mm high, 50.8 mm long and 3.2 mm thick.
A steel material with a cross section of 2 mm was used to form the mold, and 120 pieces of this were attached to the endless link 6 to form an endless side mold.

Lead (AI) melted by this device in a melting furnace (not shown)
, aluminum (A2), and copper (A3) are each introduced into a tundish 20, which is uniformly and quietly placed in a mold formed by an endless belt 1 that runs continuously and side molds 9, 9 that restrain the width direction. The ingot 5 is poured into a plate-shaped ingot 5 having a width of 350 mm and a thickness of 5 Tt and 7 ft.
was manufactured.

When we examined the surface condition of the plate-shaped ingots 5 that were continuously obtained in this way, we found that no cracks were observed on the surface. There was no inconvenience like when using the side mold 4 connected with the wire rope 3, and stable operation could be performed.

As explained above, according to the continuous casting apparatus according to the present invention, the side mold is constructed by attaching a plurality of mold members having a cross-sectional shape to the endless link, so that the heat capacity of the side mold is reduced and the ingot is The cooling rate in the width direction can be reduced to several hundredths or less of the cooling rate in the thickness direction, and as a result, a healthy ingot without casting defects such as cracks can be obtained.

Furthermore, according to the present invention, since the side mold is constituted by a link mechanism, it has excellent mechanical strength during running, and there is no need to stop operation due to breakage, etc., as with conventional devices using wire rope (long-term operation is possible). This has remarkable effects such as stable operation over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional device, FIG. 2 is a front view of a continuous casting device showing an embodiment of the present invention, and FIG. 3 is a perspective view of a conventional device.
4 is a side view of the side mold shown in FIG. 2, and FIG. 5 is a schematic explanation of a continuous casting apparatus showing the side mold shown in FIG. 4 combined with an endless belt. 6 and 7 are schematic explanatory diagrams showing other embodiments of the present invention. 1... Endless belt, 2... Metal flock, 3... Wire rope, 5...
...Ingot, 6... Endless link, 6a...
...Link member, 7...Mold member, 8...
...Guide rail, 9 ...Side mold, 10
...Pin, 11...Roller, 14...
Curved water piece, 15... Vertical piece, 17...
Drive roll, 18... Idle wheel, 19
...Molten metal, 20...Tanditshu.

Claims (1)

[Claims] 1. A cross section consisting of a horizontal piece and a vertical piece with both upper end corners cut out for each pair of endless links in which a plurality of pairs of link members arranged side by side at intervals are connected in an endless manner. A side mold is formed by fixing the letter-shaped mold members so as to connect them at the - portions of the horizontal pieces, and providing a guide member for guiding the endless link so as to fit between the pair of link members. A continuous casting device in which these side molds are provided in close contact with each other on both sides of the upper surface along the longitudinal direction of the endless belt.