JPS6150068B2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field The present invention is aimed at reducing dross generated on the surface of molten metal poured into a mold when casting large ingots weighing 1 to 2 tons or more, for example. This invention relates to an automatic scraping device.

(b) Prior Art Conventionally, when removing the dross floating on the surface of the molten metal in the mold, a board made of asbestos or the like was used to manually scrape it off. When molding dross, the weight of dross becomes large, making it inefficient to work manually, and the work involves high temperatures, which is undesirable from a safety and hygiene perspective, so mechanization and automation of dross removal work has been desired.

(c) Disclosure of the Invention The present invention satisfies such conventional demands and provides an apparatus for automatically scraping and removing dross in a mold.

That is, the present invention mounts a frame that can be slid back and forth by a cylinder along a fixed frame that extends horizontally to one side above a turntable that arranges a plurality of molds in parallel and rotates intermittently. A downward cylinder is installed on the movable frame, and the tip of the piston rod is fixed to the center of the support frame, which is rectangular in plane, so as to face the bottom of the fixed frame, and the support frame is held horizontally. Two parallel guide shafts fixed in front and back inside the support frame slidably penetrate and support a pair of front and rear slide blocks, and the blocks are connected to the guide shafts by cylinders installed on the left and right insides of the support frame. Two support arms are attached to the lower side of each of the blocks so as to protrude diagonally downward toward the center of the support frame, and the tips thereof extend along the width of the mold. is pivoted on the upper side of a dross scraping bucket having a length comparable to that of , and both buckets are configured so that their open surfaces face each other so that when both buckets are in close contact with each other, they form a box body, A bracket is fixedly protruding from the upper surface of both buckets, and the tip of a piston rod of a downward cylinder that is pivoted to a mounting plate attached to the upper side of the slide block is pivoted to the upper end of the bracket, allowing the bucket to rotate. In front of the mold that has come to the dross scraping position below the fixed frame, there is a tray on the upper surface of the mold that receives the dripping of the dross scraped by the two buckets and has a width comparable to the width of the mold. This is an in-mold dross scraping device that is arranged so as to be movable back and forth to a position close to the center and configured to synchronize with the back and forth movement of the movable frame.

Next, embodiments of the present invention will be described with reference to the drawings.

(D) Embodiment FIG. 1 is a side view of the entire device incorporating the device of the present invention, and 1 is a turntable that rotates intermittently in the horizontal direction. The molds 2 are arranged in parallel at equal intervals. 3
are two long parallel fixed frames extending horizontally from above the center of the table 1 to one side, and on the fixed frames 3 is placed a movable frame 4 that can freely slide back and forth along the frames 3. It is driven by a cylinder 5 installed on one end of the fixed frame 3 and can be moved back and forth via a piston rod 5a.

On the movable frame 4, a scraping device section A according to the present invention and a scraping device section B for scraping the dross in the mold 2 toward the center are suspended and fixed at appropriate intervals in the front and rear. B simultaneously moves horizontally along the fixed frame 3, rotates directly below the fixed frame 3, and places the cylinder 5 directly above the stopped mold 2.
When the mold 2 is operated, one of the molds moves to scrape or collect the dross in the mold 2, as will be described later.

Next, this scraping device section A will be explained in detail with reference to FIGS. A downward-facing cylinder installed at the upper center of the support plate 6, and a piston rod 8 of the cylinder 7.
penetrates the support plate 6, and its lower end is fixed to the horizontal rib 9a at the center of the support frame 9, which is rectangular in plane, to hold the support frame 9 horizontally, and the four sides moved toward the center of the support frame 9. A guide rod 10, which is closely fitted into each of the four guide metals 11 protruding from the inside of both the movable frames 4, is erected and fixed, and the support frame 9, which is raised and lowered by the operation of the cylinder 7, is erected and fixed. It is constructed so that it does not shake.

Reference numeral 12 denotes a pair of front and rear slide blocks that are penetratingly supported by two parallel guide shafts 13 fixed across the inside of the support frame 9 in the front and back, and can slide back and forth. The piston rods 15 are connected to the tips of piston rods 15 of a cylinder 14 installed and fixed so as to face each other on the left and right sides, so that they can approach and separate from each other.

At the upper center of both blocks 12 is a downward cylinder 16 for rotating a scraping bucket 19, which will be described later.
A mounting plate 17 is provided for pivotally supporting the block, and two support arms 18 are mounted on the lower left and right sides of the block 12 so as to protrude diagonally downward from the end face of the block 12 toward the center of the support frame 9. The arm 1
8 tip is pivoted to the upper side of the scraping bucket 19.
Both scraping buckets 19 supported by the arm 18 have a substantially fan-shaped cross section with opposing surfaces open, and the length thereof is approximately the same as the width inside the mold 2, and the bottom portion thereof A small hole is made in the bucket 19 so that the molten metal can immediately fall into it, leaving behind the scooped dross.A bracket 20 is protruded and fixed at the center of the upper surface of the bucket 19, and the above-mentioned bracket 20 is fixed at the upper end of the bracket 20. Long rod 2 of downward cylinder 16
1 is pivoted, and when the rod 21 moves forward by the operation of the cylinder 16, both bucket bags 19 mutually pivot in the opening direction, and when they move backward, they mutually pivot in the closing direction.

Therefore, with the above configuration, when both buckets 19 are separated from each other and are located directly above the mold 2 in a state of being turned in the opening direction, the support frame 9 is moved by the cylinder 7.
is lowered and the bucket 19 is poured into the molten metal 2 in the mold 2.
2 surfaces and then said cylinders 14 and 16
When the molten metal 22 is activated, the two baskets 19 approach each other at the surface of the molten metal, and their open surfaces turn in the closing direction. This makes it possible to skim off the dross floating on top.

In addition, in the illustrated example, the cylinder for bucket rotation 1
The mounting plate 17 and the bucket support arm 18 that pivotally support the bucket belt 19 are not directly fixed to the slide block 12, but the open surfaces of both buckets 19 are made to elastically match to further improve adhesion and provide high rigidity. In order to prevent damage due to butt of both buckets, the mounting plate 17 is pivotably supported on the block 12 so as to be able to pivot in the vertical direction, and its rear end is urged by a coil spring 23 so as to press against the upper surface of the block 12. , thereby causing the rod 21 of the cylinder 16 to work in the pulling direction, and the arm 1
8 is pivotally supported on the lower surface of an overhang piece 24 that integrally overhangs the lower side of the block 12 toward the bucket 19 side, and a receiving plate 25 is fixed and protrudes from the base of the arm 18 toward the same side as the overhang piece 24. Then, this receiving plate 25 is urged by another coil spring 26 to be pressed toward the overhanging piece 24, and thereby the arm 18
is always rotated upward.

Reference numeral 27 denotes a saucer for preventing the dross scraped off by the two buckets 19 being closed together from dripping onto the hot water surface of the mold 2 and further to the outside of the mold 2. It has a rectangular planar shape with a width, and is attached to the tip of a piston rod of a cylinder 28 that is movable back and forth in front of the mold 2 that has come to the scraping position below the fixed frame 3. 2. It is designed to be able to move horizontally back and forth to a position close to the center of the top surface. Support rods 29 extend horizontally from both left and right sides of the cylinder 28, and rollers 30 are attached to the tips of the rods, which fit onto rails 31 laid forward. It is attached to the tip of a piston rod of another cylinder 32 installed and fixed on the lower front side of the fixed frame 3, and is adapted to move the cylinder 28 back and forth in synchronization with the back and forth movement of the scraping device section A.

Therefore, both the buckets 19 of the scraping device section A
Immediately after the dross in the mold 2 is scooped out by the cylinder 28, the saucer 27 is advanced to the lower side of the bucket 19, and while receiving the dross dripping from the bucket 19, the cylinder 32 scoops out the dross together with the bucket 19 into the mold. At this point, both buckets 19 are opened by the cylinder 16 and separated by the cylinder 14, allowing the dross in the bucket 19 to fall into the chute 33, and at the same time, the receiving tray 27 is The tray 27 moves further and the scraper (not shown) attached to the tray 27 sweeps out the dross accumulated on the tray 27 toward the chute 33.

In addition, when discharging the dross on the saucer 27,
7 may be configured to be vertically pivotable so that it can be tilted when moved onto the chute 33.

Next, regarding the dross scraping device part B, the sixth to first
This will be explained using Figure 1. When the scraping device section A suspended on the movable frame 4 moves onto the dross discharge chute 33 together with the receiving tray 27, at the same time, the scraping device section A is suspended on the rear side of the movable frame 4. The dross scraping device section B moves directly above the mold 2.

Reference numeral 50 denotes a downward cylinder installed in the center of a stand frame 51 which is floatingly fixed above both left and right movable frames 4, and the tip of the piston rod of the cylinder 50 is located at the center of the inner bottom of the cylinder 50, which is connected to the other side for operating the scraper plate 71 described later. The downward cylinder 52 is attached to the upper surface of a support frame 53 having a generally rectangular shape from the front, and the frame 53 is held so as to be movable up and down. Reference numeral 54 designates four guide rods that are erected and fixed on the wing plate 55 that is integrally formed with the bottom plate of the support frame 53 and extended forward and backward, and that tightly connect the four guide metals 56 that protrude from the inside of both movable frames 4. The support frame 53 is inserted through the support frame 53 to prevent sideways vibration when the support frame 53 moves up and down.

Two mounting frames 57 are attached to the lower side of the front and rear wing plates 55 of the bottom plate of the support frame 53 so as to spread downward from each other. A mounting plate 58 having an L-shaped cross section is fixedly attached to each of the mounting plates 58. Both mounting plates 58 are parallel to each other and face each other in the front and back with an interval approximately equal to the vertical width of the mold 2, and their length is somewhat shorter than the width of the mold 2.

Reference numeral 59 denotes two parallel guide shafts 60 which are placed side by side and fixed between the front and rear mounting plates 58.
Two pieces are inserted into each of the shafts 6 and held by hand.
There are four slide blocks that can freely slide back and forth along the front side, and the blocks 59a, 59a, 59a,
59b are two parallel guide rods 61 that penetrate and support a pair of scraper mounting blocks 67, which will be described later.
are connected to each other by.

Reference numeral 62 denotes a support bar parallel to the mounting plate 58 which is horizontally attached to the lower end of the piston rod 63 of the downward cylinder 52 installed at the inner bottom of the support frame 53. The upper ends of four connecting rods 64 are pivoted to the four slide blocks 59, and when the support bar 62 is lowered by the operation of the cylinder 52, the slide blocks 59a, 59c, and 59b supported by each guide shaft 60 are 59d are configured to separate from each other and approach each other as the bar 62 rises.

In order to prevent the support bar 62 from swinging, the support bar 65 passes through the support bar 62 up and down, and its upper end is fixed to the bottom of the support frame 53, and its lower end is supported by the shaft 60 at the center between the two guide shafts 60. These are two parallel guide pins fixed to a block 66 which is fixed across the block 66 in such a manner.

67 is the opposing slide block 59a,
Each pair of scraper mounting blocks are slidably supported by being inserted through guide rods 61, two of which are fixed across between 59b, 59c, and 59d. A guide member 68 such as a guide roller is provided, and each guide member 68 has a pair of left and right guide grooves formed in two guide plates 69 mounted and fixed between the front and rear mounting plates 58 and the fixing block 66 in the central part. A pair of left and right guide grooves 70 located at the front and rear are formed in a V-shape in plan view, moving toward each other toward the fixed block 66. As a result, each scraper mounting block 67 is restricted in its moving direction, and the support bar 6
2 descends, the front and rear slide blocks 59 separate from each other, and the pair of front and rear scraper mounting blocks 67 also separate from each other.
The four blocks 67 move as if they are scattered in all directions, and when the bar 62 rises, the four blocks 67 conversely come together.

Reference numeral 71 denotes a scraper plate for dross scraping, which is approximately L-shaped in plan and is supported and fixed on the lower surface of each scraper mounting block 67, and is closely attached to the inner wall surface of the mold 2 while each block 67 is spaced apart in all directions as described above. When the blocks 67 are assembled, the adjacent scrapers 71 overlap each other at their end sides (FIG. 11A), and when the blocks 67 come together, the overlap between the scrapers 71 increases. The dross inside the mold 2 is scraped up from the periphery toward the center (FIG. 11B).

To explain the series of actions of the entire device shown in the figure, the turntable 1 rotates and stops when the mold 2 reaches a predetermined position directly under the fixed frame 3, and the molten metal is poured from the pouring gutter (not shown). 22 is poured into the mold 2, and when the molten metal level reaches a predetermined level in the middle of the mold 2, the scraping device according to the present invention is placed on standby directly above the mold 2 by detecting this with a photoelectric tube or the like. Cylinder 7 in section A operates to immerse the lower ends of both buckets 19, which are rotating apart, into the molten metal, and further, cylinders 14 and 16 operate to close both buckets 19 to scrape off the dross on the surface of the molten metal. is called aradori).

After performing this rough removal, the cylinder 7 is reversely operated with both buckets 19 closed, and the metal contained in the dross in the bucket 19 is dripped into the mold 2 through the small hole in the bottom of the bucket. After separating and raising the bucket 19, the receiving tray 27 is advanced by the cylinder 28 to just below the bucket 19, and while keeping the dross in the bucket 19 from dripping into the mold 2, both buckets 19 are moved by the cylinder 5. The trays 27 are simultaneously moved parallel to the top of the dross discharge chute 33 by the cylinder 32, and the trays 27 are further moved backward by the cylinder 28 to discharge the dross in the trays 27 into the chute 33, and then both buckets 19 The dross in the bucket 19 is discharged into the chute 33 by expanding and separating by the reverse operation of the cylinders 16 and 14.

As the scraping device section A moves onto the chute 33 as described above, the rear dross scraping device section B, which is similarly suspended by the moving frame 4 that suspends the device section A, moves onto the mold 2. It has reached the top. First, the cylinder 50 is activated and the cylinder 50 is expanded in all directions.
The L-shaped scrapers 71 are lowered and their lower parts are immersed in the molten metal 22 in the mold 2, and then the cylinder 52 is actuated to pull up the support bar 62 to collect the scrapers 71 as described above. The dross remaining on the hot water surface is scraped up to the center of the hot water surface, and when this is completed, each scraping plate 7 is moved by the reverse operation of the cylinders 52 and 50.
1 will be expanded and raised.

Note that during the above operations, the supply of molten metal from the pouring gutter into the mold 2 continues, and the molten metal level in the mold 2 is detected by a phototube, etc.
9 and the degree of immersion of the scraper plate 71 into the molten metal 22 are automatically adjusted.

When the above-mentioned rough removal and scraping are completed, the movable frame 4 is returned to its original position using the cylinder 5, and the scraping bucket 19 is returned to the mold 2, and the dross is scraped off in the same manner as described above. (called Nakadori). Then, when the dross is scraped up again by the scraping plate 71 as described above, the pouring into the mold 2 is completed at this point, and the third dross scraping (this is done by the both buckets 19) is completed. Then, the dross scraping operation is completed.

When the series of operations described above is completed, the device (not shown) that fixes the mold 2 is released, and the turntable 1 is rotated again to pour the metal into the next mold and scrape off the dross.

In this embodiment, a dross scraping device is added in addition to the dross scraping device, but it goes without saying that this is not always necessary.

(E) Effects of the Invention The device according to the present invention is configured as described above, and can automatically scrape off dross generated on the surface of the molten metal when molten metal is poured into the mold, thereby improving safety and hygiene. It is also safe and has the advantage that the resulting metal ingots are free of impurities and of good quality can be obtained efficiently. Furthermore, according to the device of the present invention, the support arms and rods for rotating both highly rigid scraping bucket carts are each elastically supported by springs, so that both bucket carts are elastically butted together when scraping dross. Therefore, there is no fear that both buckets will be damaged, and the adhesion between both buckets is good, so dross can be scraped off reliably. In addition, after the dross is scraped off, a saucer moves under both buckets and synchronizes with the horizontal movement of the buckets, so the dross scraped inside the buckets does not drip into or out of the mold, resulting in even better quality. It has various advantages, such as being able to obtain good metal ingots and being safe in terms of safety.

[Brief explanation of the drawing]

Fig. 1 is an explanatory side view of the entire series of devices incorporating the dross scraping device according to the present invention, Fig. 2 is a partially sectional side view of the dross scraping device, and Fig. 3 is a plan view of the lower half of the device. Figure 4 is a front view of the same, Figure 5 is a perspective view of one side of the scraping bucket, Figure 6 is a side view of the dross scraping device, Figure 7 is a front view of the same, and Figure 8 is the same below. A plan view of the half part, FIG. 9 is a perspective view of the same (however, the scraping plate is not shown), FIG. 10 is a perspective view of the scraping plate part, and FIG.
Figures A to B are explanatory plan views showing the operation of the scraper. Description of symbols, A...Dross scraping device section, B...Dross scraping device section, 1...Turntable, 2...
... Mold, 3... Fixed frame, 4... Moving frame, 5... Cylinder, 6... Support plate, 7... Cylinder, 8... Piston rod, 9... Support frame, 10
...Guide rod, 11 ...Guide metal, 12
...Slide block, 13...Guide shaft, 14...Cylinder, 15...Piston rod, 16...Cylinder, 17...Mounting plate, 18...
...Support arm, 19...Scraping bucket, 20...
Bracket, 21... Rod, 22... Molten metal (molten metal), 23... Spring, 24... Overhang piece, 25... Receiving plate, 26... Spring, 27...
...Saucer, 28...Cylinder, 29...Support rod, 3
0...Roller, 31...Rail, 32...Cylinder, 33...Dross discharge chute, 50...Cylinder, 51...Base frame, 52...Cylinder, 53...Support frame, 54...Guide rod, 55 ... Wing plate, 56 ... Guide metal, 57
...Mounting frame, 58...Mounting plate, 59...Slide block, 60...Guide shaft, 61
... Guide rod, 62 ... Support bar, 63 ... Piston rod, 64 ... Connection rod, 65 ... Guide pin, 66 ... Fixed block, 67 ... Scratch plate mounting block, 68 ... Guide member, 69 ... …Guide plate,
70... Guide groove, 71... Scraping board.

Claims (1)

[Claims] 1. A fixed frame that extends horizontally to one side above a turntable in which a plurality of molds are arranged in parallel and rotates intermittently, and is slidable back and forth by a cylinder along the frame. A movable frame is mounted, a downward cylinder is installed on the movable frame, and its piston rod tip faces downward from the fixed frame, and is fixed to the center of the support frame, which is rectangular in plane, to hold the support frame horizontally. Two parallel guide shafts fixed across the inside of the support frame in the front and back slidably penetrate and support a pair of front and rear slide blocks, which are supported by cylinders installed on the left and right insides of the support frame. They are constructed so that they can approach and separate from each other along the guide shaft, and two support arms are attached to the lower sides of both blocks so as to protrude diagonally downward toward the center of the support frame, and their tips are attached to the mold. It is pivoted on the upper side of a dross scraping bucket having the same length as the width of the inside, and the open surfaces of both buckets face each other, and when both buckets come into close contact with each other, they form a box body. A bracket is fixedly protruding from the upper surface of both buckets, and the tip of a piston rod of a downward cylinder pivotally supported by a mounting plate attached to the upper side of the slide block is pivotally attached to the upper end of the bracket. The support arms of both scraping buckets are pivotally supported on the lower side of the slide block and urged to pivot upward by a spring, and the support arms of both scraping buckets are pivotably mounted to support the cylinder for pivoting the bucket. The plate is pivotally supported on a slide block so as to be able to pivot up and down, and is biased by another spring to pivot in the direction in which the piston rod of the bucket pivot cylinder is pulled up;
Further, in front of the mold that has come to the dross scraping position below the fixed frame, there is a tray at the center of the upper surface of the mold that receives the dripping dross scraped by the two buckets and has a width comparable to the width of the mold. A device for scraping dross in a mold, the device being arranged so as to be movable back and forth to a position close to the movable frame, and configured to synchronize with the back and forth movement of the movable frame. 2. Claim 1, wherein the saucer is attached to the tip of a piston rod of a cylinder that is movable back and forth, and the cylinder is further connected to the tip of a piston rod of another cylinder installed and fixed at the lower front side of the fixed frame. A device for scraping dross inside the mold.