JPH0815654B2 - Slag removing device in continuous casting machine - Google Patents

Description

The present invention relates to the casting of lead and other low-melting point non-ferrous metals or their alloys, and relates to the slag floating on the molten metal surface poured into a mold. The present invention relates to a debris removing device.

"Prior Art" In a continuous casting machine in which molten metal such as lead is poured into the inside of a continuous casting machine while continuously transferring the molten metal into the ingot, the molten metal is poured into the casting mold. At that time, since the slag of metal oxide floats on the surface of the molten metal, the slag is removed to obtain a good product. Conventionally, such slag removal work has been done by using a scraping device with a scraper attached to the end fitting of the hydraulic cylinder.The scraper is used to scrape the scrap from one end of the mold to the center, and the scraper is scraped by an operator. It is generally done by scooping.

"Problems to be solved by the invention" However, since the above-mentioned removal work is forced to be performed in a bad environment, it puts a heavy burden on the worker. Therefore, conventionally, it takes about 15 minutes to replace the worker. It had to be done and the work efficiency was not good.

Also, when the above scraper is used, if the scraper is moved at a high speed, the slag will escape, so it cannot be operated at a high speed, and in this respect, the work efficiency was not good, and a large slag was found in the scraper. The removal efficiency was not sufficient because the small slag that was drawn up escaped when it was sandwiched.

In view of the above circumstances, an object of the present invention is to provide a slag removing device capable of automatically and continuously removing slag floating on the molten metal surface in a mold and efficiently removing the slag at a high speed. .

"Means for Solving the Problems" The present invention for achieving the above-mentioned object is to arrange an ingot by pouring a molten metal by a pouring device while continuously transferring the molds arranged in parallel with each other. Used in a continuous casting machine for continuous casting, a slag removing device for removing slag floating on the molten metal surface of the molten metal poured in the mold, in the transfer direction of the mold A trolley that reciprocates along the trolley, a drive source that reciprocates the trolley, and a slag removing device main body provided on the trolley. The slag removing device main body is a molten metal poured into the mold. Reticulate body for scooping up slag floating on the molten metal surface, horizontal drive mechanism for moving the reticulated body in the horizontal direction along the length direction of the mold, and vertical direction for moving the reticulated body in the vertical direction Drive mechanism and its mesh It is characterized by comprising a rotary drive mechanism for rotating in the vertical plane of the casting mold in the longitudinal direction, and a vibration mechanism for shaking off the slag adhering to the reticulated body by vibrating the reticulated body. To do.

"Operation" The slag removing device of the present invention moves the carriage in synchronization with the continuously transferred molds, while moving the mesh body horizontally from one end side to the other end side of the mold, Scrape the slag floating on the surface of the bath by the net. Then, after scooping off the slag, the net is evacuated from above the mold, and the oscillating member is vibrated by the vibrating mechanism to remove the slag from the net.

[Embodiment] An embodiment in which the present invention is applied to a lead continuous casting machine will be described below with reference to FIGS. 1 to 5.

1 to 3 are views showing a schematic configuration of a slag removing device of this embodiment, in which reference numeral 1 is a dolly, 2 is a slag removing device main body, and 3 is a pouring device. In the device of the above, a slag removing device body 2 and a pouring device 3 are mounted on a common carriage 1.
And the rail 4 is passed under the carriage 1 as shown in FIG. 3 in the illustrated y direction (from right to left in FIG. 3, from top to bottom in FIG. 1). While pouring a fixed amount (for example, 50 Kg) of molten lead into the casting mold 5 that is continuously transferred by the pouring device 3,
The slag removing device main body 2 is configured to remove the slag from the mold 5.

The dolly 1 has a structure in which wheels 7 are attached to a lower portion of a frame 6 assembled by a steel frame, and the dolly 1 is driven on a rail 9 along ay direction by driving a hydraulic cylinder 8 (driving source). It is adapted to reciprocate, that is, to move forward in the transfer direction of the mold 5 and to move backward in the opposite direction. The stroke of the reciprocating movement of the carriage 1 is set to be substantially equal to the mutual distance between the arranged molds 5 (for example, about 200 mm in the case of a 50 kg ingot mold), and the moving speed thereof is the mold when moving forward. 5
It can be adjusted to the transfer speed of

The pouring device 3 provided on the cart 1 will be described. The pouring device 3 is composed of a tank 10 for storing molten lead and two quantitative feeders 11.
Molten lead is constantly sent to the tank 10 from a supply source (not shown), and an overflow pipe
Through 12 the molten lead flows out to a return gutter 13 provided on the floor surface, and from the return gutter 13 the molten lead returns to the supply source as indicated by the dashed arrow. That is, the molten lead is always circulated through the above-mentioned route, which prevents the temperature of the molten lead from decreasing in the tank 10.

Further, a bottoming cylinder 14 is attached to the bottom surface of the tank 10, and by opening the cylinder 14, molten lead is intermittently poured into the quantitative feeder 11 by a fixed amount. . These quantitative feeders 11 are containers for pouring molten lead into the mold 5,
Both ends thereof are rotatably supported by the frame 6 by the shaft 15, and the fixed amount feeder 11 can be simultaneously rotated about the shaft by operating the hydraulic cylinder 16. Then, by rotating these quantitative feeders 11 as shown by the alternate long and two short dashes line in FIG. 3 and inverting them, the molten lead in the quantitative feeders 11 is introduced into the two molds 5 located diagonally below them. It is supposed to be poured at the same time.

Next, the debris removing device main body 2 will be described. This slag removing device main body 2 includes a punching metal 20 for scooping a slag floating on the molten metal surface of molten lead poured into the mold 5 by the quantitative feeder 11, and the punching metal 20 in the x direction in the drawing, that is, in the mold 5. A horizontal driving mechanism 21 for moving along the horizontal direction along the length direction, a vertical driving mechanism 22 for moving the punching metal 20 in the z direction shown in the drawing, that is, a vertical direction, and the punching metal 20 of the mold 5. The main components are a rotation drive mechanism 23 that rotates in a vertical plane in the length direction, and a vibration mechanism 24 that vibrates the punching metal 20.

As shown in FIG. 4, the punching metal 20 is a stainless steel plate having an arcuate tip and provided with a large number of small holes, and its width is slightly smaller than the inner width of the mold 5. There is. Two punching metals 20 are attached to the tip of a T-shaped holder 25, and the distance between their centers is equal to the mutual distance between the molds 5. It is designed to be able to scoop up.

Holder 25 with punching metal 20 attached
As shown in FIG. 2, the base end of the crank member 26 is fixed to one end of the crank member 26, and the crank member 26 extends vertically in the middle portion thereof. ) Is rotatably supported by a pin 28 at the lower end thereof. The elevating shaft 27 is vertically movable in a casing 29 by a linear guard and a ball screw mechanism (not shown). Also, this casing 29
Is connected to the drive unit 30 of the horizontal drive mechanism 21, and the horizontal drive mechanism 21 causes the vertical drive mechanism 22 to move to x.
You can move in any direction.

The horizontal drive mechanism 21 is supported by a pedestal 31 provided in the front part of the trolley 1 and extends horizontally, and a vertical direction is provided by a DC servo motor and a ball screw mechanism (not shown) housed therein. The drive unit 30 to which the drive mechanism 22 is attached is configured to move in the x direction, and the bellows 32 are attached to both sides of the drive unit 30. Reference numerals 33 and 34 are support frames.

Further, the punching metal 20 can be rotated about the pin 28 in the vertical plane by the rotation drive mechanism 23. The rotary drive mechanism 23 is composed of the crank member 26, the rod 35, a rotary disk 37 (see FIGS. 1 and 3) housed in the casing 36, and a stepping motor and a worm gear (not shown). It can be moved up and down together with the lifting shaft 27. The lower end of the rod 35 is connected to the tip of the crank member 26 by a pin 38, and the upper end of the rod 35 is a rotating disk.
The rotation disk 37 is connected to the peripheral portion of 37 by a pin 39 so that the rotation disk 37 can rotate about a shaft 40 in a vertical plane by a stepping motor and a worm gear.
This drives the stepping motor to drive the rotating disc 37
When the rod is rotated, the rod 35 moves up and down, and the tip of the crank member 26 moves in the vertical direction accordingly. Therefore, the punching metal 20 attached to the rear end of the crank member 26 is indicated by the arrow in FIG. It is designed to rotate about pin 28 as shown.

A vibrating mechanism 24 is provided above the return gutter 13. The vibrating mechanism 24 has a T-shaped bar 44 attached to the tip of a rod of an air cylinder 43, and vibrates the punching metal 20 by driving the air cylinder 43 to bring the bar 44 into contact with the punching metal 20. give,
This is for sieving off the slag adhering to the punching metal 20.

As described above, the punching metal 20 has the x direction and the z direction.
The punching metal 20 can be freely moved along the direction and can be rotated about the pin 28, and its moving speed and rotating speed can also be freely set. Is controlled by a microcomputer (not shown). In the apparatus of this embodiment, the tip of the punching metal 20 is preset so as to move along the locus shown by the chain double-dashed line in FIG. That is, the punching metal 20 starts from the origin position S above one end of the mold 5,
First, it moves forward in the x direction and descends, then rotates to an angle slightly inclined with respect to the molten metal surface so that its tip is located below the molten metal surface, and in that state it advances to scoop the slag and mold 5 On the other end of the return gutter 13 while moving above the return gutter 13 and rotating in the opposite direction to become vertical again, and then descending to immerse the punching metal 20 in the molten lead in the return gutter 13 and then rise again. It is set so as to move in such an order as to return to the origin position S. That is, a part of the return gutter 13 is located below the punching metal 20 that has finished the operation of scooping the slag. Returning punching metal 20 immediately after scooping up slag
After immersing in the molten metal in 13, the punching metal 20 is vibrated to remove the slag, so that the slag attached to the punching metal 20 can be completely removed without being fixed by cooling. In order to make the above settings, it is sufficient to perform teaching operation in advance and store the moving order and its speed in the microcomputer, and it is desirable to provide the microcomputer with a remote control box for that purpose.

The configuration of this device has been described above. Next, the operation will be described.

First, the hydraulic cylinder 8 is operated at a predetermined timing to start moving the carriage 1 forward in the y direction, and the moving speed thereof is synchronized with the transfer speed of the mold 5. Then, while the carriage 1 is moved forward, the quantitative feeder 11 is turned over to pour the molten lead into the two molds 5 and, at the same time, the punching metal 20 is moved and rotated as described above, so that the molten lead is already poured. Scrape off the slag from the two preceding molds 5. The above operation is the mold 5
Is transferred by one minute, that is, while the mold 5 is moved forward by about 200 mm.

Then, the trolley 1 is retracted to the original position, but while the trolley 1 is retracted, the fixed amount feeder 11 is returned and the bottoming cylinder 14
Open and pour molten lead again from tank 11,
Performs slag removal operation from punching metal 20. That is, as described above, the punching metal 20 is soaked in the molten lead in the return gutter 13 to melt the fixed slag, and the punching metal 20 is lifted and then the bar 44 of the vibrating mechanism 24 is contacted to vibrate the punching metal 20. The slag is dropped by and then returned to the origin position S. The above operation is carried out while one mold 5 is transferred. That is, the forward movement of the trolley 1,
One reciprocating reciprocation is performed while two molds 5 are transferred. By doing so, since the next two molds 5 have already been transferred to the lower part of the quantitative feeder 11 when the carriage 1 returns to the original position, the above procedure is repeated thereafter.

The movement of the punching metal 20 and the movement of rotation are controlled by the microcomputer as described above.
The timing for activating, the timing for opening and closing the bottoming cylinder 14, etc. may be mechanically provided by providing a limit switch at an appropriate position.

As described above, according to this apparatus, molten lead can be automatically poured into the continuously transferred mold 5, and immediately after that, the slag can be automatically removed from the mold 5. Moreover, since the scraped scum can be automatically slid off by the vibrating mechanism 24, it is possible to automatically and continuously perform the scatter work, which was conventionally performed by the worker, by this device. Therefore, the burden on the worker can be reduced and the work efficiency can be remarkably improved.

Further, since the slag does not escape even if the punching metal 20 is moved at high speed, the punching metal 20 can be moved at sufficiently high speed, and moreover, the two casting molds 5 are simultaneously poured with the molten metal. Since the slag is removed from the mold 5 at the same time, the work efficiency is improved and the removal efficiency is also excellent in this respect as compared with the case of using the conventional scraper.

In addition, at the time of starting operation, the quantitative feeder 11 and the mold 5
If the temperature is constant, the molten lead poured into the mold 5 may be cooled and the surface of the molten metal may rapidly solidify. In this case, the movement and rotation of the punching metal 20 for scooping is obstructed. Being punched metal 20 and each drive mechanism 21,22,
23 will be forced and will cause a malfunction. In order to prevent such a situation, before the operation is started, the quantitative feeder 11 and the mold 5 are preheated to a sufficiently high temperature to prevent the rapid solidification of the molten lead, and the punching metal 20 receives an unreasonable force. It is desirable to provide a safety mechanism that stops the movement and rotation promptly when added.

Further, a slit having a width of about 10 mm is provided on the quantitative feeder 11, and molten lead is poured into the mold 5 through the slit so that the solid matter of dross generated in the quantitative feeder 11 flows into the mold 5 together with the molten lead. It is desirable to prevent

Incidentally, the above embodiment is a case where the present invention is applied to a lead continuous casting machine for producing a lead ingot, but similarly in the case of casting other low melting point non-ferrous metals or their alloys as well as lead. Of course, it can be applied. Further, although the punching metal is used as the mesh in the above-mentioned embodiment, the punching metal is not limited to the punching metal and a wire mesh may be used as long as it can scoop off the slag.

"Effects of the Invention" Since the present invention is configured as described above, it has the effects described below.

Since the mesh is configured to be scraped by moving the mesh along the length of the mold, it is possible to automatically and continuously perform the scraping work performed by the worker in the past. The burden on the worker can be reduced and the work efficiency can be remarkably improved.

In addition, since the mesh can be moved in the same path as manual scooping, the scooping efficiency of the slag is improved almost all over the surface of the molten metal. It is possible to use a reticulated body having excellent taking efficiency.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention,
1 is a plan view, FIG. 2 is a front view, FIG. 3 is a side view, FIG. 4 is a view showing the shape of punching metal (mesh), and FIG. 5 is a view for explaining the operation of punching metal. It is a figure. 1 ... carriage, 2 ... scraping device main body, 5 ... mold, 8 ...
… Hydraulic cylinder (drive source), 20… Punching metal (mesh), 21… Horizontal drive mechanism, 22… Vertical drive mechanism, 23… Rotation drive mechanism, 24… Vibration mechanism.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hajime Ito Hajime Ito 1-5-2 Otemachi, Chiyoda-ku, Tokyo Within Sanryo Metal Co., Ltd. (72) Seiichi Abe 27-27 Nishishinagawa, Shinagawa-ku, Tokyo No. Mitsubishi Metals Co., Ltd. Tokyo Works (56) References JP-A-58-32571 (JP, A)

Claims (2)

[Claims] 1. A continuous casting machine in which molds are arranged in parallel with each other and continuously transferred, and molten metal is poured into the molds by a pouring device to continuously cast an ingot. A slag removing device for removing slag floating on the molten metal surface poured into a mold, wherein a trolley that reciprocates along the transfer direction of the mold and a drive source that reciprocates the trolley And a scrubbing device body provided on the trolley, the scrubbing device body comprising:
A net-like body that scoops up the slag floating on the molten metal surface poured into the mold, and a horizontal drive mechanism that moves the net in the horizontal direction along the length direction of the mold,
A vertical drive mechanism for moving the mesh body in the vertical direction, a rotation drive mechanism for rotating the mesh body in a vertical plane in the length direction of the mold, and a mesh body by vibrating the mesh body. A slag removing device in a continuous casting machine, comprising a vibration mechanism for sieving off the slag attached to the slag. 2. The pouring device comprises a tank for storing the molten metal constantly fed from a supply source, and a return gutter for receiving the molten metal overflowing from the tank, and a part of the return gutter is provided with the slag. The slag removing device for a continuous casting machine according to claim 1, wherein the slag removing device is located below the net body after the scooping operation.