Die casting slag scraping equipment

Abstract

This invention relates to the field of aluminum melt slag scraping and discloses a die casting slag scraping device, including a crucible and a slag scraping mechanism next to the crucible. The slag scraping mechanism includes a frame, a horizontal moving unit on the frame, a vertical moving unit on the horizontal moving unit, a cantilevered part horizontally on the vertical moving unit, a slag scraping rod vertically on the end of the cantilevered part away from the vertical moving unit, and a slag scraping plate at the lower end of the slag scraping rod to reduce interference between the slag scraping device and other equipment.

Description

Technical Field

[0001] This invention relates to the field of aluminum melt slag scraping, and more specifically to die casting slag scraping equipment. Background Technology

[0002] During the aluminum product processing and forming process, a ladle is used to scoop the molten aluminum from the crucible and then pour it into a mold to form the relevant aluminum product. However, because the surface of the molten aluminum is prone to forming an oxide film when in contact with air, oxidized aluminum dross will form on the surface of the aluminum. When the aluminum is poured into the mold, the aluminum dross will also enter the mold, thus affecting the forming quality of the aluminum product in the mold.

[0003] In existing technologies, a slag scraping device is usually installed above the crucible to scrape the aluminum slag off the crucible. However, in actual operation, this makes it inconvenient to operate other processes: such as putting raw materials into the crucible to melt them into aluminum liquid and scooping out the aluminum liquid with a ladle, both of which need to be done from above the crucible. Installing a slag scraping device above the crucible compresses the operating space of other processes, which can easily lead to interference between different devices and is not conducive to assembly line production. Summary of the Invention

[0004] The present invention aims to provide a die casting slag scraping device to reduce interference between the slag scraping device and other equipment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a die-casting slag scraping device, including a crucible and a slag scraping mechanism next to the crucible. The slag scraping mechanism includes a frame, a horizontal moving unit on the frame, a vertical moving unit on the horizontal moving unit, a cantilevered part on the vertical moving unit, a slag scraping rod on the end of the cantilevered part away from the vertical moving unit, and a slag scraping plate at the lower end of the slag scraping rod.

[0006] The beneficial effects of this plan are:

[0007] 1. After the raw materials in the crucible are melted into molten aluminum, the horizontal moving unit drives the vertical moving unit to move horizontally closer to the crucible, so that the scraper is as close as possible to the side wall of the crucible away from the frame. The vertical moving unit drives the cantilever to move downward, thereby moving the scraper rod closer to the surface of the molten aluminum, inserting part of the scraper into the molten aluminum, and driving the scraper to move towards the side closer to the frame, thus pushing the aluminum slag to the side wall of the crucible closer to the frame. At this time, the molten aluminum is scooped up with a ladle to minimize the amount of aluminum slag scooped up by the ladle, thereby improving the forming quality of the aluminum product.

[0008] 2. Although the frame is located on the side of the crucible, the scraper rod is lifted by the cantilever, which in turn lifts the scraper plate. When scraping is needed, the scraper plate is sent into the crucible, and when scraping is not needed, the scraper plate is retracted. This avoids compressing the operating space of other processes and reduces interference between the scraping equipment and other equipment.

[0009] 3. Since the slag scraper needs to overcome the resistance of the molten aluminum to move horizontally when scraping slag in the crucible, the horizontal movement of the slag scraper requires more power than the vertical movement. Therefore, the horizontal movement unit is directly fixed to the frame instead of the vertical movement unit, so as to provide more direct power for the horizontal movement.

[0010] 4. Compared to rotational motion, the horizontal and vertical moving units in this design are both linear motions, which are simple in structure, low in cost, and have simple trajectories, making them less prone to interference with other equipment.

[0011] Preferably, as an improvement, the horizontal unit includes a horizontal threaded rod, a horizontal slide bar, and a horizontal drive component. The horizontal threaded rod and the horizontal slide bar are arranged in parallel. One end of the horizontal threaded rod is connected to the output shaft of the horizontal drive component, and the other end of the horizontal threaded rod is rotatably connected to the frame. The vertical moving unit is threadedly connected to the horizontal threaded rod and slidably connected to the horizontal slide bar. With this configuration, the horizontal drive component drives the horizontal threaded rod to rotate, the horizontal threaded rod drives the vertical moving unit to move horizontally, and the horizontal slide bar prevents the vertical moving unit from rotating with the horizontal threaded rod.

[0012] Preferably, as an improvement, the vertical moving unit includes a sliding plate, which is threadedly connected to a horizontal threaded rod and slidably connected to a horizontal sliding bar. The sliding plate is provided with a vertical protrusion, a vertical threaded rod, and a vertical drive component. The vertical protrusion and the vertical threaded rod are arranged parallel to each other. One end of the vertical threaded rod is connected to the output shaft of the vertical drive component, and the other end is rotatably connected to the sliding plate. The cantilevered portion is threadedly connected to the vertical threaded rod, and the vertical moving unit is slidably connected to the vertical protrusion. With this configuration, the vertical drive component drives the vertical threaded rod to rotate, the vertical threaded rod drives the cantilevered portion to move vertically, and the vertical protrusion prevents the cantilevered portion from rotating with the vertical threaded rod.

[0013] Preferably, as an improvement, the inner wall of the crucible has a circular cross-section, a rotary motor is provided on the cantilever part, the output shaft of the rotary motor is fixedly connected to the scraper rod, the scraper rod is rotatably connected to the cantilever part, the scraper plate includes a rotating plate and a fixed plate, the fixed plate can cover the rotating plate, the fixed plate is provided with a limiting groove, the limiting groove matches the shape of the upper edge of the crucible, the fixed plate is rotatably connected to the scraper rod, and the rotating plate is fixedly connected to the scraper rod.

[0014] Circular crucibles have uniform thickness and heat transfer, and lack the corners of rectangular crucibles. They are commonly used in the market, and continuing to use the existing crucibles when updating slag scraping equipment undoubtedly saves costs and procurement time. Therefore, this solution continues to use circular crucibles. However, relying solely on a single scraper blade results in a linear scraping trajectory, leaving aluminum slag at both ends of the blade unremoved. To adapt to the crucible shape, the inventors explored various methods:

[0015] First, an elastic element is installed inside the slag scraper so that the length of the slag scraper can change according to the shape of the crucible, and the two ends of the slag scraper are pressed against the side wall of the crucible. However, the elastic element usually cannot withstand high temperature and is prone to failure in molten aluminum.

[0016] Then, with the scraper rod as the axis, the scraper plate is rotated around the scraper rod. Since the radius of the crucible is constant, the length of the scraper plate does not need to be changed to scrape away all the aluminum dross. However, the scraper plate drives the aluminum liquid to rotate. Even if the scraper plate scrapes the aluminum liquid to the side away from the ladle, the aluminum liquid continues to drive the aluminum dross to rotate due to inertia and return to the side closer to the ladle. Some aluminum dross will still be scooped away by the ladle, thereby reducing the forming quality of the aluminum product.

[0017] Next, the inventors set up a fixing plate to prevent the molten aluminum from rotating the aluminum slag back to the side near the ladle. However, to achieve the purpose of blocking, the fixing plate needs to be connected to at least one of the scraper rod and the side wall of the crucible. However, in order to facilitate the movement of the scraper rod after scraping the slag, the inventors fixed the fixing plate to the side wall of the crucible. After the rotating plate rotates once, the aluminum slag sticks to the fixing plate. In order to facilitate the cleaning of the aluminum slag on the fixing plate, the fixing plate and the crucible are designed to be detachably connected.

[0018] Then, the inventors discovered that due to precision issues, it was impossible to guarantee that the scraper rod would be in the same position every time it scraped slag. This resulted in a large gap between the rotating plate and the fixed plate, allowing aluminum slag to leak through and reducing the forming quality of the aluminum products. Therefore, the inventors rotatably connected one end of the fixed plate to the scraper rod and installed a limiting groove on the other end. On the one hand, as the vertical moving unit moves downward, the side wall of the limiting groove applies downward pressure to the upper edge of the crucible, thus fixing the other end of the fixed plate to the crucible. On the other hand, when the vertical moving unit moves the scraper rod upward, the aluminum slag adhering to the fixed plate falls back into the crucible due to its own weight and the surface tension of the molten aluminum, reducing the efficiency of cleaning the aluminum slag. Compared to using other clamps, because the fixed plate is fixed to the crucible through the limiting groove, there are no clamps obstructing the side of the fixed plate, allowing it to fit tightly against the rotating plate, trapping the aluminum slag between the rotating plate and the fixed plate, thus preventing the aluminum slag from falling off when the scraper rod moves upward. After the scraper brings the aluminum slag to the processing position, it drives the rotating plate to rotate, which in turn pushes the fixed plate to rotate as well. Then, the scraper's speed drops rapidly, and the fixed plate separates from the rotating plate due to inertia, causing the aluminum slag that was originally trapped between them to fall off. After separation, the rotating plate rotates in the opposite direction, and the fixed plate and rotating plate collide again. The remaining aluminum slag stuck to the fixed plate and rotating plate falls off due to the collision, thus automatically cleaning the aluminum slag on the fixed plate and rotating plate in preparation for the next scraping.

[0019] Therefore, this setting has the following effect:

[0020] 1. Under the premise of the same capacity, a round crucible has a larger volume than a rectangular crucible, and the efficiency of melting raw materials is higher.

[0021] 2. Through the horizontal and vertical moving units, the scraper rod moves to the center of the crucible, the limiting groove aligns with the upper edge of the crucible and applies downward pressure, and the scraper rod drives the rotating plate to rotate under the drive of the rotary motor, thereby scraping away the filter slag on the surface of the aluminum liquid.

[0022] Preferably, as an improvement, a slag groove is provided on the side wall of the crucible, with the side of the slag groove away from the side wall of the crucible being flat and the same width as the slag scraper. With this configuration, if there is no slag groove, as the amount of aluminum slag scraped away by the slag scraper increases, some of the aluminum slag cannot adhere to the side wall of the crucible, and some of the aluminum slag bounces back to the side near the ladle, thereby reducing the forming quality of the aluminum product; while the slag scraper scrapes the aluminum slag into the slag groove, and the aluminum slag will no longer bounce back to the side near the ladle.

[0023] Preferably, as an improvement, the slag tank includes a disassembly section capable of holding aluminum slag, and the disassembly section is detachably connected to the crucible. This configuration allows the disassembly section to be easily removed and its contents cleaned as the amount of aluminum slag increases.

[0024] Preferably, as an improvement, the slag tank also includes a sealing plate, which is set on the side wall of the crucible. The sealing plate has several sealing protrusions, which are hemispherical. The bottom of the disassembly section has filter holes, and the thickness of the bottom of the disassembly section is 3-10cm. The filter holes cooperate with the sealing protrusions. With this setting, before the aluminum melts, the disassembly section is placed on the sealing plate. Through the weight and density of the disassembly section, under the action of gravity, the sealing protrusions and filter holes are ensured to be tightly connected, so that the aluminum melt will not enter the disassembly section. This prevents aluminum slag from entering the disassembly section and floating up. If the height of the floating slag is close to the height of the aluminum melt, the aluminum slag in the disassembly section will prevent the aluminum slag outside the disassembly section from entering, and thus cause the aluminum slag to bounce back to the side near the ladle, thereby reducing the forming quality of the aluminum product. When the aluminum slag in the disassembly section accumulates to a certain extent, the disassembly section is removed, and the aluminum melt that entered the disassembly section with the aluminum slag flows back to the crucible through the filter holes, avoiding waste of aluminum melt.

[0025] Preferably, as an improvement, the thickness of the sidewall of the disassembly section away from the crucible sidewall gradually decreases from bottom to top. This arrangement facilitates the entry of aluminum dross into the disassembly section and prevents the aluminum dross from being unable to enter the disassembly section due to excessive wall thickness.

[0026] Preferably, as an improvement, it also includes an operating table and a turntable, with both the turntable and the slag scraping mechanism mounted on the operating table, and several crucibles mounted on the turntable. With this arrangement, one crucible heats and melts the aluminum liquid, while another crucible scrapes off the slag. Then, as the turntable rotates, the aluminum liquid in one crucible is scooped out with a ladle, and the slag is scraped off from the other crucible, alternating between these processes. This increases slag scraping efficiency and reduces the waiting time for melting the aluminum liquid. Attached Figure Description

[0027] Figure 1 This is a top view of Example 1;

[0028] Figure 2 This is a three-dimensional isometric view of the slag scraping mechanism in Example 1;

[0029] Figure 3 This is a top view of the crucible in Example 2;

[0030] Figure 4 for Figure 3 Sectional view along line AA;

[0031] Figure 5 This is a top view of the crucible in Example 3;

[0032] Figure 6 for Figure 5 Sectional view along the BB direction. Detailed Implementation

[0033] The following detailed description illustrates the specific implementation method:

[0034] The reference numerals in the accompanying drawings include: operating table 1, turntable 2, crucible 3, slag trough 300, disassembly part 310, pull rod 311, filter hole 312, sealing plate 320, sealing protrusion 321, slag scraping mechanism 4, frame 410, frame 411, cantilever part 420, slag scraping rod 430, slag scraping plate 440, rotating plate 441, fixing plate 442, limiting groove 443, ring 444, horizontal threaded rod 451, horizontal sliding rod 452, horizontal driving component 453, sliding plate 461, slider 462, protrusion 463, upper horizontal plate 464, lower horizontal plate 465, vertical threaded rod 466, and vertical driving component 467.

[0035] Example 1

[0036] Example 1 is basically as follows Figure 1 As shown: a die-casting slag scraping device, including an operating table 1, a turntable 2 on the operating table 1 and a slag scraping mechanism 4 beside the turntable 2, two crucibles 3 on the turntable 2, and the slag scraping mechanism 4 including a frame 410, as shown. Figure 2 As shown, the frame 410 includes a rectangular frame 411, a horizontal moving unit on the frame 411, a vertical moving unit on the horizontal moving unit, a cantilever 420 on the vertical moving unit, a scraper rod 430 vertically welded to the end of the cantilever 420 away from the vertical moving unit, and a scraper plate 440 integrally formed at the lower end of the scraper rod 430, the scraper plate 440 being a rectangular plate.

[0037] The horizontal unit includes a horizontal threaded rod 451, a horizontal slide rod 452, and a horizontal drive component 453. The horizontal drive component 453 is disposed on the side of the frame 411. The horizontal threaded rod 451 and the horizontal slide rod 452 are arranged in parallel. One end of the horizontal threaded rod 451 is connected to the output shaft of the horizontal drive component 453, and the other end is rotatably connected to the frame 410. Both ends of the horizontal slide rod 452 are welded to the frame 411.

[0038] The vertical moving unit includes a slide plate 461, with a slider 462 integrally formed on the rear side of the slide plate 461. The slider 462 is threadedly connected to a horizontal threaded rod 451 and slidably connected to the horizontal slide rod 452. A rectangular protrusion 463 is integrally formed vertically on the left and right sides of the front side of the slide plate 461. An upper horizontal plate 464 and a lower horizontal plate 465 are respectively provided at the upper and lower ends of the front side of the slide plate 461. A vertical drive member 467 is provided on the upper horizontal plate 464. A vertical threaded rod 466 parallel to the two protrusions 463 is rotatably connected to the lower horizontal plate 465. The lower end of the output shaft of the vertical drive member 467 passes through the upper horizontal plate 464 and is welded to the upper end of the vertical threaded rod 466. The right end of the cantilever part 420 is threadedly connected to the vertical threaded rod 466 and slidably connected to the vertical protrusion 463.

[0039] Both the horizontal drive component 453 and the vertical drive component 467 are motors. In this embodiment, the motors are fixed by bolts and are both servo motors of model MR-J2S-100A.

[0040] The specific implementation steps are as follows:

[0041] 1. After the raw material in the crucible 3 is melted into aluminum liquid, the crucible 3 is rotated to the side close to the slag scraping mechanism by the turntable 2. The horizontal moving unit drives the vertical moving unit to move horizontally closer to the crucible 3, so that the slag scraper 440 is as close as possible to the side wall of the crucible 3 away from the frame 410. The vertical moving unit drives the cantilever part 420 to move downward, thereby driving the slag scraper 430 to approach the surface of the aluminum liquid, and inserting part of the slag scraper 440 into the aluminum liquid.

[0042] 2. Drive the slag scraper 440 to move towards the side closer to the frame 410, thereby pushing the aluminum slag onto the side wall of the crucible 3 near the frame 410; rotate the turntable to rotate the crucible 3 to the side closer to the ladle, use the ladle to scoop up the molten aluminum, rotate another crucible 3 with molten aluminum to the side closer to the slag scraper mechanism, and repeat step 1.

[0043] 3. If there is a lot of aluminum dross on the side wall of crucible 3, clean it manually.

[0044] Example 2

[0045] Example 2 is based on Example 1: The inner wall of the crucible 3 has a circular cross-section, and a rotary motor is provided at the upper left end of the cantilever part 420. The lower end of the output shaft of the rotary motor passes through the cantilever part 420 and is welded to the upper end of the scraper rod 430. A horizontally arranged annular groove is opened on the scraper rod 430. Figure 3 As shown, the scraper plate 440 includes a rotating plate 441 and a fixed plate 442. The side of the rotating plate 441 and the fixed plate 442 closest to the scraper rod 430 is the inner side, as shown below. Figure 4 As shown, the fixed plate 442 can cover the rotating plate 441. The fixed plate 442 has a limiting groove 443 on its lower side. The limiting groove 443 matches the shape of the upper edge of the crucible 3. The fixed plate 442 is rotatably connected to the scraper rod 430. Specifically, a ring 444 is integrally formed on the upper inner side of the fixed plate 442. The ring 444 is rotatably engaged with the annular groove on the scraper rod 430. The inner side of the rotating plate 441 is integrally formed with the scraper rod 430.

[0046] The specific implementation steps differ from those in Example 1 in that:

[0047] In step 1: the scraper rod 430 moves to the center position of the crucible 3 through the horizontal moving unit and the vertical moving unit, the limiting groove 443 aligns with the upper edge of the crucible 3 and applies downward pressure, and the fixing plate 442 is clamped to the edge of the crucible 3.

[0048] In step 2: the scraper rod 430 drives the rotating plate 441 to rotate under the drive of the rotating motor, thereby scraping away the filter slag on the surface of the aluminum liquid; the rotating plate 441 and the fixed plate 442 clamp the aluminum slag, and the horizontal moving unit and the vertical moving unit drive the scraper rod 430 to move upward, thereby bringing out the aluminum slag.

[0049] Example 3

[0050] like Figure 5 As shown, in Example 3, based on Example 1, the inner wall of the crucible 3 has a circular cross-section, and a slag groove 300 is integrally formed on the side wall of the crucible 3. The side of the slag groove 300 away from the side wall of the crucible 3 is a plane and has the same width as the slag scraper 440.

[0051] The specific implementation steps differ from those in Example 1 in that:

[0052] In step 2: such as Figure 5 As shown, the slag scraper 440 moves from right to left, scraping aluminum slag into the slag trough 300.

[0053] Example 4

[0054] like Figure 6As shown, the difference between Embodiment 4 and Embodiment 3 is that the slag tank 300 includes a disassembly part 310 and a sealing plate 320. For ease of display, the cross-sectional lines of the disassembly part 310 and the sealing plate 320 are omitted. The disassembly part 310 is cup-shaped and can accommodate aluminum slag. A pull rod 311 is provided at the upper end of the disassembly part 310 to facilitate manual lifting. The sealing plate 320 is integrally formed on the side wall of the crucible 3. Several sealing protrusions 321 are integrally formed on the sealing plate 320. The sealing protrusions 321 are hemispherical. Several filter holes 312 are opened at the bottom of the disassembly part 310. The thickness of the bottom of the disassembly part 310 is 3-10cm. In this embodiment, 5cm is more suitable. The filter holes 312 and the sealing protrusions 321 cooperate with each other. The sealing performance of the sealing protrusions 321 on the filter holes 312 is sufficient to ensure that the volume of the aluminum liquid entering the disassembly part 310 is negligible relative to the volume of the aluminum slag. The thickness of the upper end of the side wall of the disassembly part 310 away from the side wall of the crucible 3 gradually decreases from bottom to top.

[0055] The specific implementation steps differ from those in Example 3 in that:

[0056] In step 1: Before the aluminum melts, the disassembly part 310 is placed on the sealing plate 320. Due to the weight and density of the disassembly part 310, the sealing protrusion 321 and the filter hole 312 are tightly connected under the action of gravity, so that the aluminum melts and does not enter the disassembly part 310.

[0057] In step 3: when there is a lot of aluminum dross in the disassembly part 310, the pull rod 311 is lifted, the filter hole 312 separates from the sealing protrusion 321, and the aluminum liquid that entered the disassembly part 310 along with the aluminum dross flows back into the crucible 3 through the filter hole 312.

[0058] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A die-casting slag-scraping apparatus, characterized by: The system includes a crucible and a slag scraping mechanism next to the crucible. The slag scraping mechanism includes a frame, a horizontal moving unit on the frame, a vertical moving unit on the horizontal moving unit, a cantilevered part on the vertical moving unit, a slag scraping rod on the end of the cantilevered part away from the vertical moving unit, and a slag scraping plate at the lower end of the slag scraping rod. The horizontal moving unit includes a horizontal threaded rod, a horizontal slide bar, and a horizontal driving component. The horizontal threaded rod and the horizontal slide bar are arranged in parallel. One end of the horizontal threaded rod is connected to the output shaft of the horizontal driving component, and the other end of the horizontal threaded rod is rotatably connected to the frame. The vertical moving unit is threadedly connected to the horizontal threaded rod and slidably connected to the horizontal slide bar. The vertical moving unit includes a sliding plate, which is threadedly connected to a horizontal threaded rod and slidably connected to a horizontal sliding bar. The sliding plate is provided with a vertical protrusion, a vertical threaded rod, and a vertical drive component. The vertical protrusion and the vertical threaded rod are arranged in parallel. One end of the vertical threaded rod is connected to the output shaft of the vertical drive component, and the other end of the vertical threaded rod is rotatably connected to the sliding plate. The cantilever part is threadedly connected to the vertical threaded rod, and the vertical moving unit is slidably connected to the vertical protrusion. The inner wall of the crucible has a circular cross-section. A rotary motor is installed on the cantilever part. The output shaft of the rotary motor is fixedly connected to the scraper rod. The scraper rod is rotatably connected to the cantilever part. The scraper plate includes a rotating plate and a fixed plate. The fixed plate can cover the rotating plate. The fixed plate is provided with a limiting groove. The limiting groove matches the shape of the upper edge of the crucible. The fixed plate is rotatably connected to the scraper rod. The rotating plate is fixedly connected to the scraper rod.

2. The die casting scrap removal apparatus of claim 1, wherein: The crucible has a slag trough on its side wall. The side of the slag trough away from the crucible side wall is flat and has the same width as the slag scraper.

3. The die casting scrap removal apparatus of claim 2, wherein: The slag trough includes a disassembly section that can hold aluminum slag, and the disassembly section is detachably connected to the crucible.

4. The die-casting slag scraping equipment according to claim 3, characterized in that: The slag trough also includes a sealing plate, which is set on the side wall of the crucible. The sealing plate has several sealing protrusions, which are hemispherical. The bottom of the disassembly part has a filter hole, and the thickness of the bottom of the disassembly part is 3-10cm. The filter hole and the sealing protrusion cooperate with each other.

5. The die-casting slag scraping equipment according to claim 4, characterized in that: The thickness of the sidewall on the side of the disassembly section away from the crucible sidewall gradually decreases from bottom to top.

6. The die-casting slag scraping equipment according to claim 1, characterized in that: It also includes an operating table and a turntable. The turntable and the slag scraping mechanism are both set on the operating table, and several crucibles are set on the turntable.

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