JPS60111761A - Method and device for removing scum of molten metal - Google Patents

Abstract

PURPOSE:To make the motion of each member small and to decrease the scum which is left without being removed in the stage of removing the scum by scraping the same in a casting mold and drawing the scum while guide plates are held pressed to a pair of drawing plates separate from a scraping plate. CONSTITUTION:An arm 6 is horizontally moved above a casting mold 1 according to the movement of a carriage 5 and the scum floating on the surface of a molten metal is scraped by a scraping plate 12 to one side part of the mold 1. A stand 29 is then lowered to dip the top ends of drawing plates 34a, 34b and guide plates 49a, 49b into the molten metal and thereafter the plate 49b is moved toward the other end face direction of the plates 34a, 34b. The scum is thus scraped between the plates 34a and 34b and is pressed to the above-described other side surface. The plates 34a, 34b are turned to close the bottom end edges thereof thus capturing the scum between the plates 34a, 34b and the plates 49a, 49b. The stand 29 is moved upward to remove the plates 34a, 34b and the plates 49a, 49b from the molten metal and further the plates are moved to the scum discharge position on the outside of the mold 1. The plate 49b is detached from the plates 34a, 34b in this position and the plates 34a, 34b are turned oppositely from the above-mentioned direction to open the bottom end edges thereof. The scum is thus discharged.

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.

General VC1 When molten non-ferrous metals such as zinc and lead (hereinafter referred to as bath water) are poured into a mold to cast a large ingot, the liquid generated in the pouring gutter and within the mold floats on the surface of the hot water.

If such molten metal solidifies as it is, it will deteriorate the quality and appearance of the ingot, so the liquid is removed.

- Conventionally, in order to remove the above-mentioned residue,
Using a device such as that disclosed in Publication No. 9173, the residue is scraped from both ends of the mold to the center of the mold using two inclined sampling plates, and in this state the sampling plates are raised to collect the residue. A method of collecting and removing it is known. However, in the above method, since the sampling plate is used to both scrape up and collect the liquid, the operation becomes large and a large amount of liquid is left behind.Also, since the pickled liquid is collected in the center of the mold, the surface of the hot water is lowered. There were various problems, including not only the tendency for casting to occur due to fluctuations, but also the residue left behind to solidify in the center of the ingot, resulting in an extremely poor appearance as a product.

This invention was made in order to solve the problems of the conventional methods as described above, and it is possible to not only remove the residue reliably, but also reduce the occurrence of casting and produce a product with good appearance. The object of the present invention is to provide a removal method and an apparatus therefor.

The method for removing sludge according to the present invention includes, for example, a scraping method in which the 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. 1 arranged almost parallel to the process with a predetermined interval.
A pair of vertically oriented sampling plates and a pair of vertically oriented guide plates facing each other, which are arranged perpendicularly to the outside of these sampling plates, are lowered from above the collected waste, A descending immersion step in which the sampling plate and the guide plate are immersed to a desired depth in the molten metal, and a step of lowering the sampling plate so that their lower edges approach each other while the guide plate is in contact with the end surfaces of both sides of the sampling plate. a capture step in which the sampling plate and the guide plate are rotated to close their lower edges, thereby trapping the residue between the sampling plate and the guide plate, and then the sampling plate and the guide plate are raised to the desired height above the mold, and the residue is removed from the outside of the mold. Move it to the sludge discharge position, and then use the raindrops to measure the raindrops.
The apparatus is characterized by comprising a discharge step of opening the lower end of the medical cavity and discharging the residue.The apparatus according to the present invention for carrying out the method described above is arranged above one end of the mold. , a scraping device that scrapes 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 that is placed above the lower end of the mold to collect the scraped residue. , a sampling device for discharging by force outside the mold; the scraping device includes an arm movable horizontally above the mold, a first actuating member for moving this arm, and a collecting device provided at the tip of the arm, τ The collecting device has a scraping plate that can be tilted between a position above the mold and a position immersed in the molten metal in the mold, and a second actuating member that tilts the scraping plate. The pedestal is movable horizontally between the upper part of the lower end of the mold and the residue discharge position outside the mold and can be raised and lowered; a fourth actuating member, a pair of vertical 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; and rotating these sampling plates. a fifth actuating member; a pair of vertically oriented guide plates disposed at the lower part of the pedestal and oriented perpendicularly to both sides of the sampling plate and facing each other and capable of contacting an outer end surface between the sampling plates; , the first one which brings these guide plates into contact with the sampling plate. The present invention is characterized in that it has a second biasing member.

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

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

The mold 1 is generally elongated in one direction when viewed from above, and the scraping device 2 is an arm whose upper end is fixed to a trolley 5 that runs on a rail 4 disposed above the mold 1 along its longitudinal direction. A crank 7 is provided at the lower end of the arm 6, and a shaft 11 to which a holder 10 is fixed is pivoted to one arm 9 of the arm 7. The scraping board 12 has a width somewhat smaller than that.
Or installed. Connecting piece 13.14 on shaft 8°11
are fixed to each other, and a spring 15 is held between the connecting pieces 13 and 14. The other arm 16 of the crank 7 has the tip of an actuating cylinder 170 pivoted to the middle part of the rear end T-arm 6. The scraper plate 12 is tilted between a position away from the surface of the bath water in the mold 1 and above the mold, and a position where it is immersed in the molten metal in the mold 1.

Support frame 18 for rail 4. An operating cylinder 19 is installed at the cylinder 19, and the truck 5 is attached to a rod 20 of the cylinder cylinder 9. The operation of this cylinder 19 causes the truck 5 to move toward the rail 4.
The arm 6 travels above the mold 1 so that the arm 6 moves horizontally above the mold 1 along its longitudinal direction.

21a and 21b are cylinders attached to the tips of the support frame 18, and both cylinders 21 are connected to each other.

21b is a seventh pin t-2 that detects the surface of the molten metal in the mold 1.
2m, , 22b are respectively attached, and one sensor 22m detects the hot water level in the first stage, and the other sensor 22b detects the hot water level in the second stage.

As shown in M1 to FIG. A suspended trestle 29 is provided, the trestle 29
When viewed from the side in the width direction of the mold 1 (see Figure 3), there are vertically installed pairs of brackets (30 m and 30 b) on the left and right sides, respectively.

Shafts 32a and 32b to which holders 31m and 31b are fixed, respectively, are pivotally attached to 30b.

Each holder 31m, 31b has a vertical sampling plate 34m, 34b whose end is housed in a notch 33 formed therein.
are fixed with screws 35. Both sides board 34m, 3
4b are arranged along the longitudinal direction of the mold 1 parallel to each other 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.゛Axle 32m, 32b
The ends of links 36a and 36b are fixed to 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.
A rod 39 of an actuating cylinder 38 installed vertically on the frame 29 is pivotally attached to 7. Therefore cylinder 3
8, the sampling plates 34a and 34b are rotated between a position where their lower edges are open and a position where their lower edges are close, as shown by solid lines in FIG.

When viewed from the longitudinal side of the mold 1 (see FIG. 2), the pedestal 29 has l pairs of brackets 40 m and 40 b on the left and right sides, respectively. Both left and right brackets 40 B *
401) has a link 41a.

The middle part of 41b and the upper ends of links 42m and 42b are shafts 43a and 43b, respectively, and shaft 44a.

44b. Links 41a, 41
An end portion of the lower end portion of b is a shaft 45a.

The other ends of links 46a and 46b, which are pivotally connected to the lower ends of links 42a and 42b via 45b, are connected to shafts 47.
The brackets 40 a and 47 b are pivotally connected to each other via brackets 40 a and 47 b, and the quadrilateral formed by connecting the axes of each of the brackets 40 a and 40 b is a parallelogram.

At the lower ends of the links 41a and 41b are holders 48 m,
48 b are provided respectively, and these holders 48
m, 48 b has a vertical guide plate 49 m, 49 b
are fixed by screws 50, respectively. These guide plates 49. , 49b are arranged on both sides of the sampling plates 34m', 34b so as to be perpendicular thereto. The upper end of the link 41m 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 the sampling plate 3 due to the biasing force of the spring 53.
4m, presses one side end surface of 34b, and is always in contact with the end. The pressing force of the guide plate 49m is adjusted according to the mounting position of the screw 52, and is variable by changing the biasing force of the spring 53.

The upper end of the link 41b is connected to the frame 29 like the link 41a.
It projects from the upper part of the cradle 29, and at its projecting upper end is pivotally connected to a rod 55 of an actuating cylinder, preferably a pneumatic cylinder 54, installed laterally on the pedestal 29 -C1. , A, 4□5
, 4°b, 46b and the guide plate 49b are normally in the position indicated by the chain lines in FIG.
Then, the guide plate 49b moves toward the solid line position, and the guide plate 49b presses the other side end surface of the sampling plates 34m and 34b, and comes into contact with the end surface. The pressing force of the guide plate 49b is variable by changing the air pressure of the pneumatic cylinder 54. Standing board 5 on pedestal 29
A screw 57 having a nut 58 screwed onto the end thereof is loosely fitted into the screw 57, and a spring 59 is provided at a portion of the screw 57 that projects from the upright plate 56 toward the rod 55 to surround that portion. When the pneumatic cylinder 54 is activated, the rod 55
collides with the screw 57 to compress the spring 59, thereby relieving the biasing force of the pneumatic cylinder 54.

The pedestal 29 is raised and lowered by the actuation of the actuation cylinder 27, and by the actuation of the actuation cylinder 61 having a rod 60 attached to the rear end of the carriage 25, the upper force of the other end of the mold 1 and the residue discharge position outside the mold (not shown) are raised and lowered by the operation of the actuation cylinder 27. It is designed to move between

A bracket 62 installed vertically on the trolley 25 has a drive motor 6.
3 is provided, and a molten metal droplet receiver 64 made of an L-shaped plate is provided on the shaft to keep the molten metal at ℃.

Next, based on the operation of the residue removing device as described above, the fourth A-
The method for removing the waste stream will be described with reference to FIG. 4D.

When the mold 1 is moved and stopped at a predetermined position, the molten metal passes through a gutter (not shown) to the other end of the mold 1 (below the sampling device 3).
Injected at At this time, the arm 6 of the scraping device 2 is pulled toward one end of the g-type 1, and the operating cylinder 17
is activated, and the scraping plate 12 is tilted from the chain position shown 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 plate 34a.

34b and guide plates 49a, 49b are located above the other end of the mold 1 (FIG. 48).

When the level of the molten metal poured into the mold 1 rises and the sensor 22m detects the level of the first stage, the pouring is temporarily interrupted, the cylinders 21m and 21b are activated, and the sensor 22a is activated.

22b rises. At the same time, cylinder 19 operates,
As the trolley 5 moves, the arm 6 moves horizontally above the mold 1, and as a result, the scum floating on the hot water surface is scraped toward the other end of the mold 1 by the scraping plate 12 (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. In addition, the scraping plate 12 is connected to the crank 7
Since it is rotatable relative to the mold 1 and supported by the crank 7 via the spring 15, even if it comes into contact with the wall surface of the mold 1 during movement, the impact is alleviated and no damage occurs.

When the arm 6 moves a predetermined distance and the pickled material is scraped onto the other end of the mold l, the cylinder 27 is actuated and the pedestal 29 is lowered, and the sampling plates 34a, j4b and guide plates 49m; 49b
The tip is immersed in the molten metal. At that time, the guide plate 49m collides with the scraping plate 12, but the scraping plate 12 rotates while in contact with the guide plate 49m, and the sampling plate 34a e 341)
Also, the lowering of the guide plates 49a and 49b is not hindered. Next, the pneumatic cylinder 54 is actuated to move the guide plate 49b toward the side end surfaces of the sampling plates 34m and 34b, and transfer the residue to the sampling plate 34a.

34b and abuts against the side end surface.

Next, the cylinder 38 is actuated to rotate the sampling plates 34m and 34b, and their lower edges close and the residue is transferred to the sampling plates 34a, 34a.
34b and guide plates 49a and 49b (Fig. 4c). With the rotation of the sampling plates 34m and 34b, the rotation of the sampling plates 34a
e Both end surfaces of 341H and guide plates 49a and 49b
However, to prevent this, the guide plate 49a #491) is inserted between the collection plate 34 & $34
If the sampling plates 34m and 34b are brought into contact with the sampling plates 34m and 34b in a fixed state, a large load will be applied to the sampling plates 34m and 34b, which may cause malfunction thereof. However, as mentioned above, the guide plates 49a and 49b
are in elastic contact with the sampling plates 34a, 34b due to the biasing force of the spring 53 and the pneumatic cylinder 54, respectively, so the biasing force must be adjusted appropriately to prevent residue from escaping the guide plates 49g, 49b. This makes it possible to displace the sampling plates 34a, 34b due to malfunction, the sampling plates 34m, 34b and the guide plates 49m, 49.
Damage to b can be prevented.

In addition, when capturing the liquid, as shown in Figure 5, first the collection plate 3
4 a a 34 b (not shown, but guide plate 49 a
, 49b) is relatively shallowly immersed in the molten metal, and the guide plate 49b is used as the sampling plate 34a.

34b, and then the sampling plate 34a #34
While further lowering b, the sampling plates 34a and 34b are rotated to close their lower 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. Collection plate 34a.

If 34b is immersed relatively deeply in the molten metal from the beginning, the flow can be prevented from escaping, but in this case, the molten metal will not only be cut off and residue will remain near the wall of the mold l, but also the sampling plate 3
4m, 34b and the guide plate 49m*49b and the wall surface of the mold 1 become smaller, the molten metal rises up, and when it solidifies, a frame-shaped protrusion is formed, which deteriorates the surface condition of the ingot. do. 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 operated to raise the pedestal 29, and the sampling plates 34m, 34b and guide plates 49a, 49b escape from the molten metal. When the upper limit is reached, the drive *JJ Tanabata 63 is activated and the drop catcher 64 is rotated in the direction F of the lower edge of the sampling plates 34a, 34b to prevent the public bath water from falling.

Next, the cylinder 61 is actuated, the carriage 25 is moved, the pedestal 29 is moved to the discharge position outside the mold 1, and then stopped. At that position, the drive motor 63, the cylinder 38, and the pneumatic cylinder 54 operate, and the drop catcher 64 rotates in the opposite direction to the above, and the guide plate 49b moves toward the sampling plate 34a.

34b, and the sampling plates 34m and 34b are rotated in the opposite direction to the above, their lower edges are opened, and the pickles are discharged (Fig. 4D).

Once the liquid has been discharged, repeat the same urinary action as described above once or twice to further remove the liquid, then operate the cylinder zxb' to lower the sensor 22b and inject the molten metal into the disease type 1 again. . When the molten metal rises and the sensor 22b detects the second stage level, the injection of molten metal is stopped and the sensor 22b is activated by the operation of the cylinder 21b.
rises. Thereafter, the pickling removal work is performed once by the same operation as described above, and the scraper &12 returns to the position indicated by the chain line in FIG.

In the above embodiment, one guide plate 49a is always brought into contact with the sampling &34a, 34b, and the other guide plate 49b is normally kept apart, but both guide plates 49a, 49
b may be in constant contact with both guide plates 49 m
, 49b may be spaced apart from the normal sampling plate 341 and brought into contact with the sampling plate 341 when capturing the residue. In addition, various modifications can be made to this invention.

The method of this invention is as described above, and after raking the beach from one end of the mold to the other end with a collecting plate, a pair of collecting plates separate from the raking plate are used to guide them. Since the residue is collected while the plate is in contact with the plate, the movement of each member is small and the amount of residue left behind can be minimized.Furthermore, since the waste is collected at the end of the mold, there is no problem with casting due to fluctuations in the metal level. There is little tension, and even if there is some material left behind,
It solidifies at the ends of the ingot, resulting in a product with good appearance.

Furthermore, according to the apparatus of the present invention, all the members contributing to residue removal are operated by actuating members, so that resort 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 scrape the residue in the mold that is to be removed next. This allows for faster work. Furthermore, since the guide plate is brought into elastic contact with the inner and outer end surfaces of the sampling plate by the biasing force of the biasing member, it is possible to not only prevent the sampling plate from malfunctioning when capturing the sample, but also prevent the sampling plate from This also has the effect of preventing damage to the guide plate.

[Brief explanation of the drawing]

FIG. 1 is an overall front view showing an embodiment of the inventive device, FIG. 2 is a partially cutaway front view showing the main parts of the collecting device,
Figure 3 is a partially broken right side view of the same as above, and Figure 4A-
FIG. 4D is a schematic front view showing the sequence of the method for removing residue using the device of the present invention, and FIG. 5 is a side view showing a preferred embodiment of capturing the residue. 1... Mold 2... Scraping device 3... Collection device 6... Arm 12... Scraping plate 17... Operating cylinder (second operating member) 19... Operating cylinder (second operating member)... 1 operating member) 27... operating cylinder (
Fourth operating member) 34a, 34b - Sampling plate, 38... Operating cylinder (fifth operating member) 49a,
49b... Guide plate 53... Spring (first biasing member) 54... Pneumatic cylinder (second biasing member) 61... Actuation cylinder (
3rd operating member) 64...Shizuku Uke is patent applicant: 1 person other than Mitsui Mining & Mining Co., Ltd.

Claims (1)

[Scope of Claims] 1. A scraping step of scraping the liquid floating on the surface of the molten metal poured into the mold from one end of the mold to the other end with a scraping plate, and A pair of vertically oriented sampling plates arranged almost parallel to each other and a pair of vertically oriented guide plates facing each other and arranged perpendicularly to both sides of these sampling plates are scraped together. a descending immersion step in which the sampling plate and the guide plate are lowered from above the bath molten metal to a desired depth; a capturing step in which the bottom edges of the two are rotated so that they approach each other and the bottom edges are closed, thereby trapping the residue between the sampling plate and the guide plate, and then the sampling plate and the guide plate are raised above the mold; , the mold is moved to the residue discharge position outside the mold, the rear sampling plate is moved 1 m in the opposite direction to the above, and the lower edges thereof are opened, and the residue is discharged. How to remove metal residue. 2. In the capturing step, while lowering the sampling plate and the guide plate, both the sampling plates are rotated.Claim 1
The method described in section. 3. A scraper disposed above one end of the mold to scrape the liquid floating on the surface of the molten metal poured into the mold toward the other end of the mold, and a scraper disposed above the other end of the mold. a collection device that collects and discharges the collected pickles to the outside of the mold, and the scraping device includes an arm that can move horizontally above the mold, and a first actuating member that moves this arm. a scraper 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 operation for tilting the scraper plate. and a member on the other end of the mold. a pedestal that is movable in the horizontal direction between the side and the residue discharge position outside the mold, and that can be raised and lowered; a fourth actuating member, provided substantially parallel to the lower part of the pedestal at a predetermined interval;
a pair of vertical sampling plates that are rotatable so that their lower edges approach each other; a fifth actuating member that rotates these sampling plates; a pair of vertically oriented guide plates facing each other and capable of coming into contact with the end surfaces of both sides of the sampling plate; A molten metal residue removing device comprising: a second biasing member.