JPH0218188B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for removing residue floating on the surface of molten metal poured into a mold.

Generally, when molten non-ferrous metals such as zinc and lead (hereinafter referred to as molten metal) are poured into a mold to cast a large ingot, residue generated in the pouring trough and within the mold floats on the surface of the molten metal. If such molten metal solidifies as it is, it will deteriorate the quality and appearance of the ingot, so the residue is removed.

Conventionally, in order to remove the above-mentioned residue, a device such as that disclosed in Japanese Patent Publication No. 52-9173 was used, and the residue was removed from both ends of the mold using two inclined sampling plates. A method is known in which the residue is collected and removed by scraping up to the center of the slag and then raising a sampling plate in that state. However, in the above method, since the collection plate both scrapes and collects the residue, the operation becomes large and a lot of residue is left behind.
In addition, since the residue is collected at the center of the mold, not only is it easy for casting to occur due to fluctuations in the molten metal level, but the residue left behind solidifies in the center of the ingot, resulting in an extremely poor appearance as a product. Various problems arose.

This invention was made to solve the problems of the conventional method as described above, and not only can residue be reliably removed, but also there is less occurrence of casting.
The purpose of the present invention is to provide a residue removal method and device that can produce products with good appearance.

The sludge removal method according to the present invention includes, for example, a scraping method in which sludge floating on the surface of molten metal poured into a mold with a rectangular upper surface is scraped from one end of the mold toward the other end using a scraping plate. A pair of vertical sampling plates arranged substantially parallel to each other with a predetermined interval, and a pair of vertical sampling plates facing each other arranged at right angles on both sides of these sampling plates. A descending dipping step in which a guide plate in the same direction as above is lowered from above the scraped residue, and the collecting plate and the guide plate are immersed to a desired depth in the molten metal, and the guide plate is brought into contact with both outer end surfaces of the collecting plate. In this state, both sampling plates are rotated so that their lower edges approach each other to close their lower edges, thereby capturing residue between the sampling plate and the guide plate, and then the sampling plate is closed. and raise the guide plate to a desired height above the mold, and move it to the residue discharge position outside the mold,
The present invention is characterized by comprising a discharge step of subsequently rotating both sampling plates in the opposite direction to the above to open their lower edges and discharging the residue.

The apparatus according to the present invention for carrying out the above method is arranged above one end of a mold and scrapes the residue floating on the surface of molten metal poured into the mold toward the other end of the mold. a scraping device for collecting the scraps, and a collecting device disposed above the other end of the mold to collect the scraped residue and discharge it to the outside of the mold, and the scraping device is movable horizontally above the mold. an arm; a first actuating member for moving the arm;
a scraping plate provided at the tip of the arm and capable of tilting between a position above the mold and a position immersed in the molten metal in the mold; and a second actuating member for tilting the scraping plate. The collection device has a pedestal that can be moved horizontally between the upper end of the mold and a residue discharge position outside the mold and can be raised and lowered; a pair of vertically oriented sampling plates that are provided substantially parallel to each other at a predetermined interval at the bottom of the pedestal and are rotatable so that their lower edges approach each other; a fifth actuating member for rotating the sampling plate; and a fifth actuating member located at the lower part of the pedestal so as to be perpendicular to both outer sides of the sampling plate and facing each other and capable of abutting on both outer end surfaces of the sampling plate. This device is characterized by having a pair of vertically oriented guide plates and first and second biasing members that bring these guide plates into contact with the sampling plate.

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

As shown in FIG. 1, the residue removing device includes a scraping device 2 disposed above one end of a mold 1 that is moved by a drive device (not shown) and stops at a predetermined position;
It consists of a sampling device 3 placed above the other end of the mold 1.

The mold 1 is generally elongated in one direction when viewed from above, and the scraping device 2 is a cart 5 that runs on a rail 4 disposed above the mold 1 along its longitudinal direction.
The crank 7 is provided with an arm 6 whose upper end is fixed to the lower end of the arm 6, and a crank 7 is pivotally connected to the lower end of the arm 6 via a shaft 8 at an intermediate portion thereof. A shaft 11 to which a holder 10 is fixed is pivotally attached to one arm 9 of the crank 7, and a scraping plate 12 having a width slightly smaller than that of the mold 1 is attached to the holder 10 along the width direction of the mold 1. It is being The shafts 8, 11 have connecting pieces 13,
14 are fixed to each other, and both connecting pieces 13,
A spring 15 is engaged between the parts 14. The other arm 16 of the crank 7 has a rod 1 of an operating cylinder 17 whose rear end is pivotally connected to the middle part of the arm 6.
7' is pivotally mounted, and when the cylinder 17 is actuated, the scraping plate 12 is separated from the surface of the molten metal in the mold 1 through the crank 7 and the spring 15, and is moved to a position above the mold. It is designed to tilt between the position where it is immersed in the molten metal and the position where it is immersed in the molten metal.

An operating cylinder 19 is installed on the support frame 18 of the rail 4, and the truck 5 is attached to a rod 20 of the cylinder 19. The operation of this cylinder 19 causes the truck 5 to travel on the rail 4, and thereby the arm 6 is moved. It is adapted to move horizontally above the mold 1 along its longitudinal direction. 21a and 21b are cylinders attached to the tips of the support frame 18, and sensors 22a and 22b for detecting the level of the molten metal in the mold 1 are attached to both cylinders 21a and 21b, respectively. 22a
As a result, the first stage hot water level is determined by the other sensor 22b.
The second stage water level is detected by this method.

As shown in FIGS. 1 to 3, the sampling device 3 is mounted on a rail 24 on a support frame 23 disposed above the mold 1.
A pedestal 29 is suspended from a carriage 25 running upwards via a guide rod 26 and a rod 28 of an operating cylinder 27, and the pedestal 29 has a pair of molds on each side when viewed from the side surface in the width direction of the mold 1 (see FIG. 3). The left and right brackets 30a, 30b are provided with shafts 3 to which holders 31a, 30b are fixed, respectively.
2a and 32b are pivotally connected. Each holder 31
Vertical sampling plates 34a and 34b whose ends are accommodated in cutouts 33 formed therein are fixed to a and 31b with screws 35. Both sampling plates 34
a and 34b are arranged substantially parallel to each other along the longitudinal direction of the mold 1 with a predetermined interval (an interval somewhat smaller than the width of the mold 1). Two notches 33 are provided to accommodate two molds of different sizes.

The ends of links 36a, 36b are fixed to the shafts 32a, 32b, and these links 36a, 36b
are pivotally connected to each other via a shaft 37 that is loosely fitted into a long hole (not shown) provided at each other end, and furthermore, a rod of an actuating cylinder 38 installed vertically on the pedestal 29 is attached to this shaft 37. 39 is pivotally mounted. Therefore, due to the operation of the cylinder 38, the sampling plates 34a,
34b is adapted to rotate between a position where their lower edges are open and a position where their lower edges are close and closed, as shown by solid lines in FIG.

When viewed from the longitudinal side of the mold 1 (see Fig. 2), the pedestal 29 has two pairs of brackets 40a on the left and right sides.
40b is vertically installed, and the intermediate portions of links 41a, 41b and the upper ends of links 42a, 42b are pivotally connected to both left and right brackets 40a, 40b via shafts 43a, 43b and shafts 44a, 44b, respectively. has been done. The lower ends of the links 41a, 41b have ends connected to the links 42 via shafts 45a, 45b.
The other ends of links 46a and 46b, which are pivotally connected to the lower ends of links 46a and 42b, are respectively pivotally connected via shafts 47a and 47b, and the bracket 40
The quadrilateral formed by connecting the axes a and 40b is a parallelogram.

A holder 4 is attached to the lower end of the links 41a and 41b.
8a and 48b are respectively provided, and these holders 48a and 48b are provided with a vertical guide plate 49.
a and 49b are fixed by screws 50, respectively. These guide plates 49a, 49b are arranged on both sides of the sampling plates 34a, 34b so as to be perpendicular thereto. The upper end of the link 41a protrudes above the pedestal 29, and a tension spring 53 is engaged between the protruding upper end and the tip of a screw 52 screwed into the upright plate 51 on the pedestal 29. is pressed against one side end surface of the sampling plates 34a, 34b by the biasing force of the spring 53, and is always in contact with the end surface. The pressing force of the guide plate 49a is adjusted by adjusting the mounting position of the screw 52, and
It is variable by changing the urging force of No. 3.

Like the link 41a, the upper end of the link 41b projects above the pedestal 29, and is pivotally connected to the rod 55 of an actuating cylinder, preferably a pneumatic cylinder 54, installed laterally on the pedestal 29. The links 41b, 42b, 46b and the guide plate 49b are normally located at the chain line positions in FIG.
When the pneumatic cylinder 54 is activated, the rod 55 protrudes, the links 41b, 42b, 46b and the guide plate 49b move toward the solid line position, and the guide plate 49b presses the other side end surface of the sampling plates 34a, 34b, It is coming into contact with the The pressing force of the guide plate 49b is variable by changing the air pressure of the pneumatic cylinder 54. A screw 57 with a nut 58 screwed onto the end is loosely fitted into the upright plate 56 on the pedestal 29.
A spring 59 is provided at a portion protruding from the rod 55 to surround the portion.
When the pneumatic cylinder 54 is operated, the rod 55 abuts against the screw 57 and compresses the spring 59, thereby relaxing the biasing force of the pneumatic cylinder 54.

The frame 29 is raised and lowered by the actuation of the actuation cylinder 27, and the mold 1 is moved up and down by the actuation of the actuation cylinder 61, which has a rod 60 attached to the rear end of the carriage 25.
Residue discharge position above the other end and outside the mold (not shown)
It is becoming easier to move between the two.

A drive motor 63 is provided on a bracket 62 vertically disposed on the truck 25, and a molten metal droplet receiver 64 made of an L-shaped plate is provided on the shaft thereof.

Next, based on the operation of the residue removal device as described above,
The residue removal method will be described with reference to FIGS. 4A to 4D.

When the mold 1 is moved and stopped at a predetermined position,
Molten metal is injected into the other end of the mold 1 (below the sampling device 3) through a gutter (not shown). At this time, the arm 6 of the scraping device 2 is pulled toward one end of the mold 1, and the actuating cylinder 17 is activated to move the scraping plate 1.
2 is tilted from the chain line position in FIG. 4A to the solid line position, and its tip is waiting in the mold 1 (the position where it is immersed in the molten metal). Furthermore, the pedestal 29 of the sampling device 3 has been raised, and the sampling plates 34a, 34b and guide plates 49a, 49b are located above the other end of the mold 1 (FIG. 4A).

The level of the molten metal poured into mold 1 rises, and the first
When the sensor 22a detects the level of the step, the pouring is temporarily interrupted and the cylinders 21a,
21b is activated, and the sensors 22a and 22b rise. At the same time, the cylinder 19 operates, and the trolley 5
moves, the arm 6 moves horizontally above the mold 1, and as a result, the residue floating on the hot water surface is removed from the scraping plate 12.
The mold 1 is raked toward the other end by the mold 1 (FIG. 4B). At this time, if the cylinder 17 is operated in the forward and reverse directions to tilt the scraping plate 12 up and down, the residue will be scraped up with a greater force, which is convenient. Furthermore, since the scraping plate 12 is rotatable relative to the crank 7 and is supported by the crank 7 via a spring 15, even if it comes into contact with the wall surface of the mold 1 during movement, the impact will be alleviated and damage will occur. There's nothing to do.

When the arm 6 moves a predetermined distance and the residue is scraped up to the other end of the mold 1, the cylinder 27 is activated and the pedestal 29 is lowered, and the tips of the sampling plates 34a, 34b and the guide plates 49a, 49b are brought into contact with the molten metal. immersed. At this time, the guide plate 49a collides with the scraping plate 12, but the scraping plate 12 rotates while in contact with the guide plate 49a and prevents the collection plates 34a, 34b and the guide plates 49a, 49b from descending. There isn't. Then, the pneumatic cylinder 54 operates to move the guide plate 49
b moves toward the side end surfaces of the sampling plates 34a, 34b, scrapes the residue between the sampling plates 34a, 34b, and comes into contact with the side end surfaces. Then cylinder 3
8 is activated, the sampling plates 34a, 34b rotate, their lower edges close, and the residue is transferred to the sampling plates 34a, 34b.
and captured in a space defined by guide plates 49a and 49b (FIG. 4c). Collection plate 34
With the rotation of a and 34b, the residue is removed from the sampling plate 34.
Both end surfaces of a, 34b and guide plates 49a, 49b
However, in order to prevent this, the guide plates 49a and 49b are moved between the sampling plates 34a and 34b.
When the sampling plates 34a, 34 are brought into contact with each other in a fixed state,
The load applied to b becomes large, which may cause malfunction. However, as described above, the guide plates 49a and 49b are elastically in contact with the sampling plates 34a and 34b due to the urging force of the spring 53 and the pneumatic cylinder 54, respectively, so by adjusting the urging force as appropriate, the guide plates 49a and 49b
49b can be displaced to such an extent that the residue does not escape, thereby preventing malfunction of the sampling plates 34a, 34b and guide plates 49a, 49.
Damage to b can be prevented.

In addition, when capturing residue, as shown in FIG.
9a, 49b) are relatively shallowly immersed in the molten metal, the guide plate 49b is brought into contact with the sampling plates 34a, 34b, and then the sampling plates 34a, 34b are rotated while further lowering. Make sure to close their bottom edges. By doing so, the residue will not escape from between the lower edges of the sampling plates 34a and 34b, and the residue can be reliably captured. If the sampling plates 34a and 34b are immersed relatively deeply into the molten metal from the beginning, it is possible to prevent the residue from escaping, but in this case, the residue will be cut and the mold 1
Not only does the residue remain near the wall of the sampling plate 34, but also
The volume between the walls of the mold 1 and the guide plates 49a, 34b and 49a, 49b is reduced, causing the molten metal to bulge up, and when it solidifies, a frame-shaped protrusion is formed, which deteriorates the surface condition of the ingot. If the residue is captured as shown in Figure 5, such a phenomenon can be prevented from occurring.

When the residue is captured as described above, the cylinder 27 is activated and the pedestal 29 is raised, and the sampling plate 34
a, 34b and guide plates 49a, 49b escape from the molten metal. When the upper limit is reached, the drive motor 63 is activated to move the droplet receiver 64 to the sampling plate 34a,
The lower edge of 34b rotates downward to prevent the molten metal from falling.

Next, the cylinder 61 is actuated, the carriage 25 is moved, the pedestal 29 is moved to the residue discharge position outside the mold 1, and then stopped. In that position the drive motor 63,
The cylinder 38 and the pneumatic cylinder 54 operate, and the droplet receiver 64 rotates in the opposite direction to that described above, and the guide plate 49b separates from the sampling plates 34a and 34b, and the sampling plates 34a and 34b move in the opposite direction to that described above. They are rotated to open their lower edges and the residue is discharged (Figure 4D).

Once the residue has been discharged, repeat the same steps 1 and 2 as above.
After repeating this process several times to further remove the residue, the cylinder 21b is activated to lower the sensor 22b,
Inject the molten metal into mold 1 again. When the melt level rises and the sensor 22b detects the second stage level, the injection of molten metal is stopped and the sensor 22b is raised by the operation of the cylinder 21b. After that, perform the residue removal work 1 by the same operation as above.
The scraping plate 12 returns to the position shown in chain lines in FIG. 4A, and the pedestal 29 returns to the position shown in solid lines in the same figure, thereby completing the work.

In the above embodiment, one guide plate 49a is always in contact with the sampling plates 34a and 34b, and the other guide plate 49b is normally separated from each other, but even if both guide plates 49a and 49b are in constant contact with each other, Alternatively, both guide plates 49a and 49b may be spaced apart from normal sampling plates 34a and 34b and brought into contact with each other when collecting residue. In addition, various modifications can be made to this invention.

The method of this invention is as described above, and after scraping the residue from one end of the mold to the other end using a scraping plate, a pair of sampling plates separate from the scraping plate are used to Since the residue is collected while the guide plate is in contact with the guide plate, the movement of each member is small and the amount of residue left behind can be minimized.Moreover, since the residue is collected at the end of the mold, it is possible to There is little occurrence of casting due to fluctuations, and even if some residue is left behind,
It will solidify at the ends of the ingot,
You can get a product that looks good.

Further, according to the device of the present invention, all the members contributing to residue removal are operated by operating members, so remote control or automatic operation is possible, and the burden and danger on the operator can be reduced. In addition, since the device is broadly divided into a scraping device and a collecting device that operate separately, while the collecting device is discharging the residue, the scraping device is used to remove the inside of the mold that is to be removed next. This makes it possible to collect the residue and speed up the work. Furthermore, since the guide plate is brought into elastic contact with both outer end surfaces of the sampling plate by the biasing force of the biasing member, it is possible not only to prevent the sampling plate from malfunctioning when capturing residue; This has the effect of preventing damage to the collection plate and guide plate.

[Brief explanation of drawings]

Fig. 1 is an overall front view showing one embodiment of the device of the present invention, Fig. 2 is a partially broken front view showing the main parts of the collecting device, and Fig. 3 is a partially broken right side view of the same as above. 4A to 4D are schematic front views showing the sequence of the residue removal method using the device of the present invention, and FIG. 5 is a side view showing a preferred embodiment when capturing the residue. DESCRIPTION OF SYMBOLS 1... Mold, 2... Scraping device, 3... Collection device, 6... Arm, 12... Scraping plate, 17... Operating cylinder (second operating member), 19... Operating cylinder (first Actuation member), 27... Actuation cylinder (fourth actuation member), 34a, 34b... Collection plate, 3
8... Actuation cylinder (fifth actuation member), 49a,
49b...Guide plate, 53...Spring (first
(biasing member), 54... pneumatic cylinder (second biasing member), 61... actuation cylinder (third actuation member),
64...Shizuku Uke.

Claims (1)

[Claims] 1. A scraping step of scraping the residue floating on the surface of the molten metal poured into the mold from one end of the mold toward the other end using a scraping plate, and a predetermined interval. A pair of vertically oriented sampling plates arranged substantially parallel to each other, and a pair of vertically oriented guide plates facing each other and arranged perpendicularly on both sides of these sampling plates. A descending immersion step in which the collecting plate and the guide plate are lowered from above the scraped up sludge and immersed in the molten metal to a desired depth, and a lower dipping step in which the collecting plate and the guide plate are immersed in the molten metal to a desired depth. a capture step in which the plates are rotated so that their lower edges approach each other to close their lower edges, thereby trapping the residue between the sampling plate and the guide plate, and then moving the sampling plate and the guide plate above the mold; and a discharge step of raising the mold to a position outside the mold and moving it to a residue discharge position outside the mold, and then rotating both sampling plates in the opposite direction to open their lower edges to discharge the residue. A method for removing residue from molten metal. 2. The method according to claim 1, wherein in the capturing step, both the sampling plate and the guide plate are rotated while lowering the sampling plate and the guide plate. 3. A scraping device disposed above one end of the mold to scrape the residue floating on the surface of the molten metal poured into the mold toward the other end of the mold, and a scraping device disposed above the other end of the mold. , a collecting device for collecting scraped residue and discharging it outside the mold; the scraping device includes an arm movable horizontally above the mold; a first actuating member for moving the arm; a scraping plate provided at the tip of the arm and capable of tilting between a position above the mold and a position immersed in the molten metal in the mold; and a second actuating member for tilting the scraping plate. The collection device has a pedestal that can be moved horizontally between the upper end of the mold and a residue discharge position outside the mold and can be raised and lowered; a pair of vertically oriented sampling plates that are provided substantially parallel to each other at a predetermined interval at the bottom of the pedestal and are rotatable so that their lower edges approach each other; a fifth actuating member for rotating the sampling plate; and a fifth actuating member located at the lower part of the pedestal so as to be perpendicular to both outer sides of the sampling plate and facing each other and capable of abutting on both outer end surfaces of the sampling plate. a pair of vertical guide plates;
A molten metal residue removal device comprising first and second biasing members for respectively bringing these guide plates into contact with a sampling plate.