Low-pressure casting device for aluminum alloy component

Abstract

The invention relates to the technical field of low-pressure casting, in particular to a low-pressure casting device for an aluminum alloy component, which comprises a base, a rotary table rotationally arranged on the base, two holding furnaces arranged on the rotary table, a lifting table arranged on the base and positioned above the holding furnaces, a liquid lifting pipe arranged at the bottom of the lifting table, and a rotating plate rotationally connected to the inner bottom of each holding furnace, two first gears are rotatably arranged between the bottom of the rotary table and the base, the two first gears and the two rotary plates are coaxially arranged respectively, a rotary rod is rotatably arranged on one side of the base, a second gear is fixedly connected to the lower end of the rotary rod, and the second gear is fixedly connected to the other side of the rotary rod. The second gear is in meshing transmission with the first gear. The scraping rods are arranged in the heat preservation furnace to automatically scrape the inner wall and the outer wall of the liquid rising pipe, solid particles formed by solidification of residual molten metal are effectively removed, the situation that the solid particles enter a cavity to cause casting defects is avoided, and the internal quality of aluminum alloy components is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of low-pressure casting, and particularly to a low-pressure casting device for aluminum alloy components. Background Art

[0002] A low-pressure casting machine is a general device for low-pressure casting of aluminum alloys and can be widely used in the production of aluminum alloy castings in the automotive, motorcycle, instrument machinery, and aerospace industries. Low-pressure casting means that the mold is generally placed above a sealed heat-insulating furnace. By introducing compressed air into the heat-insulating furnace, the molten metal rises through the riser tube to fill the mold and control solidification. The heat-insulating furnace is an important component of the low-pressure casting machine. The traditional low-pressure casting device usually adopts the die-casting method of one machine with one furnace. When the molten metal in the heat-insulating furnace is at a low liquid level, the die-casting operation needs to be stopped to replace the heat-insulating furnace, which reduces the continuity of the die-casting operation.

[0003] After retrieval, a crucible type low-pressure casting machine disclosed in the patent No. CN222001826U adopts the die-casting method of one machine with two furnaces. That is, by setting two heat-insulating furnaces, the crucible furnace is moved along the first direction through a driving unit, and the crucible furnace to be replaced is moved to the adjacent installation position. At the same time, the crucible furnace filled with molten metal is moved under the lifting table structure, saving the time for filling the crucible furnace with molten metal, making full use of the natural cooling time of the blank in the metal mold, and reducing the time for replacing the crucible furnace.

[0004] However, during the process of replacing the crucible furnace in the above patent, it is necessary to lift the metal mold and the installation platen as a whole until the lower end of the riser tube is higher than the crucible furnace. During this process, the residual molten metal on the wall of the riser tube is likely to solidify into solid particles due to condensation. After the subsequent molten metal rises, it is easy to carry the solid particles formed by the molten metal into the cavity, resulting in a decline in the quality of the cast workpiece. Summary of the Invention

[0005] In order to overcome the above-mentioned disadvantages of the prior art, the present invention provides a low-pressure casting device for aluminum alloy components.

[0006] Technical solution: A low-pressure casting device for aluminum alloy components, including a base, a turntable is rotatably arranged on the base, two insulation furnaces are arranged on the turntable, a lifting platform is arranged on the base and located above the insulation furnace, a die-casting mechanism is arranged on the lifting platform, the die-casting mechanism includes a fixed mold and a movable mold that can be lifted and moved relative to the fixed mold, a cavity is arranged between the movable mold and the fixed mold, a liquid riser is arranged at the bottom of the lifting platform, the top of the liquid riser is connected to the cavity of the die-casting mechanism, a liquid riser port for the liquid riser to pass through is arranged at the top of the insulation furnace, a rotating plate is rotatably connected to the bottom of the insulation furnace, and two scraping rods are fixedly connected to the rotating plate , the two scraping rods are used to scrape the inner and outer tube walls of the rising tube respectively, two gears 1 are rotatably arranged between the bottom of the turntable and the base, the two gears 1 are coaxially arranged with the two rotating plates respectively, a rotating rod is rotatably arranged on one side of the base, a gear 2 is fixedly connected to the lower end of the rotating rod, the gear 2 is meshed with the gear 1 for transmission, a transmission assembly is arranged between the rotating rod and the die-casting mechanism, the transmission assembly is used to transmit the rotation of the rotating rod to the lifting of the movable mold in the die-casting mechanism, and a receiving plate is arranged on the lifting platform which can move closer to or away from the cavity of the die-casting mechanism, and the receiving plate is used to receive the castings completed by die-casting.

[0007] Furthermore, the die-casting mechanism also includes a top seat fixedly connected to the lifting platform, a pair of screws and a pair of fixed rods are respectively arranged on both sides of the bottom of the top seat, the movable mold is located between the top seat and the fixed mold, the movable mold is threadedly connected to the two screws, and is slidably connected to the fixed rods, and a plurality of ejector rods for ejecting the casting are slidably connected to the movable mold.

[0008] Furthermore, the transmission assembly includes gear three, which is rotatably connected to the lifting platform, and gear three and the rotating rod are axially slidable splinedly connected. Gear four is fixed to the bottom ends of the two screw rods. Gear five is rotatably arranged on the lifting platform between gear four and gear three, and the two sides of gear five are respectively meshed with gear three and gear four for transmission.

[0009] Furthermore, a guide frame is fixedly connected to the base, the lifting platform is slidably connected to the guide frame, at least two hydraulic cylinders are installed on the base, the telescopic rod of the hydraulic cylinder is fixedly connected to the bottom of the lifting platform, and a motor 1 for driving the turntable to rotate and a motor 2 for driving the rotating rod to rotate are installed in the base.

[0010] Furthermore, a placement box is provided on the top of the lifting platform and below the receiving plate, a sponge is placed in the placement box, the sponge is a contoured structure matching the cavity contour of the die-casting mechanism, a release agent is adsorbed on the sponge, a plurality of thumb cylinders are provided at the bottom of the receiving plate, the thumb cylinders are used to clamp the sponge, a driving assembly is provided on the lifting platform, the driving assembly is used to drive the receiving plate to move closer to or away from the cavity of the die-casting mechanism, and can drive the receiving plate to rise and fall relative to the placement box.

[0011] Further, the driving assembly includes a second hydraulic cylinder and an electric slide rail. At least two second hydraulic cylinders are installed on both sides of the lifting platform. The telescopic rods of the second hydraulic cylinders on the same side are jointly fixed with an electric slide rail, and the output ends of the two electric slide rails are jointly fixed to the bottom of the receiving plate.

[0012] Further, a heat preservation cover is fixedly connected to the bottom of the lifting platform, and the heat preservation cover is used to seal the liquid lifting port of the heat preservation furnace.

[0013] Further, an arc-shaped supporting rail is fixedly connected to the base, and the bottom of the rotating platform has a sliding groove matching the arc-shaped supporting rail. The opening of the arc-shaped supporting rail faces the second gear.

[0014] The beneficial effects are as follows: By arranging a scraping rod in the heat preservation furnace to automatically scrape the inner and outer walls of the liquid lifting pipe, the solid particles formed by the solidification of the residual molten metal are effectively removed, preventing the solid particles from entering the cavity and causing casting defects, ensuring the internal quality of the aluminum alloy component. Through the transmission assembly, the rotational movement of the rotating rod is simultaneously converted into the lifting action of the moving mold and the scraping action of the scraping rod, realizing the multi-task linkage of a single power source, reducing the number of driving components, simplifying the transmission structure, reducing the equipment energy consumption, and improving the movement synchronization. Description of the Drawings

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0016] Figure 2 It is a sectional view of the internal structure of the base of the present invention.

[0017] Figure 3 It is a sectional view of the internal structure of the heat preservation furnace of the present invention.

[0018] Figure 4 It is a sectional view of the internal structure of the liquid lifting pipe and the heat preservation furnace of the present invention.

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the installation structure of the lifting platform and the guiding frame of the present invention.

[0020] Figure 6 It is a three-dimensional structural schematic diagram of the die-casting mechanism of the present invention.

[0021] Figure 7 It is a three-dimensional structural schematic diagram of the receiving plate and the placement box of the present invention.

[0022] Figure 8 It is a sectional view of the three-dimensional structure of the receiving plate of the present invention.

[0023] Names and serial numbers of components in the figure: 1 - Base, 2 - Turntable, 3 - Insulation furnace, 301 - Liquid rising port, 4 - Lifting platform, 5 - Die-casting mechanism, 501 - Fixed mold, 502 - Movable mold, 503 - Top seat, 504 - Ejector rod, 505 - Screw rod, 506 - Fixed rod, 6 - Liquid rising pipe, 7 - Rotating plate, 8 - Scraping rod, 9 - Gear 1, 10 - Rotating rod, 11 - Gear 2, 12 - Transmission assembly, 1201 - Gear 3, 1202 - Gear 4, 1203 - Gear 5, 13 - Bearing plate, 14 - Guide frame, 15 - Hydraulic cylinder 1, 16 - Motor 1, 17 - Motor 2, 18 - Insulation cover, 19 - Arc support rail, 20 - Placing box, 21 - Sponge body, 22 - Thumb cylinder, 23 - Hydraulic cylinder 2, 24 - Electric slide rail. Specific implementation manners

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] A low-pressure casting device for aluminum alloy components, as Figures 1-8As shown in the figure, it includes a base 1, a turntable 2 is rotatably arranged on the base 1, two heat preservation furnaces 3 are arranged on the turntable 2, a lifting table 4 is arranged on the base 1 above the heat preservation furnaces 3, a die-casting mechanism 5 is arranged on the lifting table 4. The die-casting mechanism 5 includes a fixed die 501 and a movable die 502 that can move up and down relative to the fixed die 501. A cavity for casting forming is arranged between the movable die 502 and the fixed die 501. A lifting pipe 6 is arranged at the bottom of the lifting table 4, and the top end of the lifting pipe 6 is communicated with the cavity of the die-casting mechanism 5. The top of the heat preservation furnace 3 has a liquid lifting port 301 for the lifting pipe 6 to pass through. The heat preservation furnace 3 also has a compressed air inlet and a molten metal injection port. More specifically, compressed air can be pressed into the heat preservation furnace 3 through an air compressor, and the air compressor can be directly installed on the turntable 2. A rotating plate 7 is rotatably connected to the inner bottom of the heat preservation furnace 3, and two scraping rods 8 are fixedly connected to the rotating plate 7. The two scraping rods 8 are respectively attached to the inner and outer pipe walls of the lifting pipe 6. When the rotating plate 7 rotates, the two scraping rods 8 can rotate around the axis of the turntable 2, so as to scrape the inner and outer pipe walls of the lifting pipe 6 respectively. Two first gears 9 are rotatably arranged between the bottom of the turntable 2 and the base 1, and the two first gears 9 are coaxially arranged with the two rotating plates 7 respectively. A rotating rod 10 is rotatably arranged on one side of the base 1, and a second gear 11 is fixedly connected to the lower end of the rotating rod 10. The second gear 11 is meshed with the first gear 9 for transmission. A transmission component 12 is arranged between the rotating rod 10 and the die-casting mechanism 5. The transmission component 12 is used to transmit the rotation of the rotating rod 10 to the lifting of the movable die 502 in the die-casting mechanism 5, so as to realize the multi-task linkage of a single power source and reduce the number of driving components. A receiving plate 13 that can move closer to or away from the cavity of the die-casting mechanism 5 is arranged on the lifting table 4. The receiving plate 13 is used to receive the castings after die-casting.

[0026] The die-casting mechanism 5 further includes a top seat 503 fixedly connected to the lifting table 4. A pair of screw rods 505 and a pair of fixed rods 506 are respectively arranged on both sides of the bottom of the top seat 503. The movable die 502 is located between the top seat 503 and the fixed die 501. The movable die 502 is threadedly connected with the two screw rods 505 and slidably connected with the fixed rods 506. A plurality of ejector rods 504 for ejecting the castings are slidably connected to the movable die 502. Specifically, the plurality of ejector rods 504 are all distributed along the outer edge of the cavity. During the mold closing and constant pressure casting process of the movable die 502 and the fixed die 501, the lower ends of the ejector rods 504 keep in contact with the castings, and the upper ends of the ejector rods 504 extend out of the top surface of the movable die 502. When the castings are cooled and formed subsequently and the movable die 502 moves upward away from the fixed die 501, the castings are kept in contact with the movable die 502 due to the preset hub design and move with the movable die 502. When the movable die 502 continues to move upward, the upper ends of the ejector rods 504 will contact the bottom surface of the top seat 503 first and remain stationary. During the continuous upward movement of the movable die 502, the lower ends of the ejector rods 504 form a pushing force on the castings, so that the castings are separated from the movable die 502.

[0027] The transmission assembly 12 includes a third gear 1201 which is rotatably connected to the lifting table 4, and the third gear 1201 is in a spline connection with the rotating rod 10 that allows for axial sliding. When the lifting table 4 moves up and down relative to the rotating rod 10, it drives the third gear 1201 to move up and down together. When the rotating rod 10 rotates, the third gear 1201 can rotate with the rotating rod 10. At the bottom of both screw rods 505, a fourth gear 1202 is fixedly connected. On the lifting table 4, a fifth gear 1203 is rotatably arranged between the fourth gear 1202 and the third gear 1201. The two sides of the fifth gear 1203 are respectively in meshing transmission with the third gear 1201 and the fourth gear 1202, ensuring that the two screw rods 505 rotate in the same direction to guarantee the effectiveness of the lifting of the moving die 502.

[0028] A guiding frame 14 is fixedly connected to the base 1. The lifting table 4 is slidably connected to the guiding frame 14. On the base 1, hydraulic cylinders 15 are symmetrically installed on the left and right. The telescopic rods of the hydraulic cylinders 15 are fixedly connected to the bottom of the lifting table 4. Inside the base 1, a first motor 16 for driving the rotating table 2 to rotate and a second motor 17 for driving the rotating rod 10 to rotate are installed.

[0029] Below the top of the lifting table 4 and beneath the receiving plate 13, a placement box 20 is provided. Inside the placement box 20, a sponge body 21 is placed. The sponge body 21 has a profiling structure matching the cavity contour of the die-casting mechanism 5. The sponge body 21 adsorbs a release agent. At the bottom of the receiving plate 13, a plurality of thumb cylinders 22 are provided. The thumb cylinders 22 are used to clamp the sponge body 21. On the lifting table 4, a driving assembly is provided. The driving assembly is used to drive the receiving plate 13 to move closer to or away from the cavity of the die-casting mechanism 5 and can drive the receiving plate 13 to move up and down relative to the placement box 20.

[0030] The driving assembly includes hydraulic cylinders 23 and an electric slide rail 24. On both sides of the lifting table 4, two hydraulic cylinders 23 are installed. On the telescopic rods of the hydraulic cylinders 23 on the same side, the electric slide rail 24 is fixedly connected in common. The output ends of the two electric slide rails 24 are fixedly connected to the bottom of the receiving plate 13 in common.

[0031] A heat preservation cover 18 is fixedly connected to the bottom of the lifting table 4. When one heat preservation furnace 3 supplies material to the die-casting mechanism 5, the heat preservation cover 18 can seal the liquid-rising port 301 of the other heat preservation furnace 3, thereby maintaining the temperature stability of the heat preservation furnace 3 when pre-supplementing molten metal to the other heat preservation furnace 3.

[0032] An arc-shaped supporting rail 19 is fixedly connected to the base 1. The bottom of the rotating table 2 has a chute matching the arc-shaped supporting rail 19. The opening of the arc-shaped supporting rail 19 faces the second gear 11 to ensure the effectiveness of the meshing transmission between the second gear 11 and the first gear 9 while providing rotational support for the rotating table 2 by the arc-shaped supporting rail 19.

[0033] Working process: Initially, two holding furnaces 3 are arranged one in front of the other relative to the base 1. The lifting pipe 6 is located in the liquid lifting port 301 of the rear holding furnace 3. Two scraping rods 8 in the rear holding furnace 3 are respectively in contact with the outer wall and the inner wall of the lifting pipe 6. At the same time, the second gear 11 meshes with the first gear 9 corresponding to the rear holding furnace 3. The heat preservation cover 18 seals the liquid lifting port 301 of the front holding furnace 3. The rear holding furnace 3 is filled with molten metal. The moving die 502 of the die-casting mechanism 5 is in a mold-closing state with the fixed die 501. Compressed air is pressed into the rear holding furnace 3 through an air compressor, so that the molten metal is injected into the cavity of the die-casting mechanism 5 from bottom to top along the lifting pipe 6. After the molten metal in the cavity of the die-casting mechanism 5 solidifies and forms, the second motor 17 drives the rotating rod 10 to rotate, so that the third gear 1201 drives the fourth gear 1202 to rotate through the fifth gear 1203, and then drives two screw rods 505 to rotate, so that the moving die 502 moves upward along the screw rods 505. During this process, the electric slide rail 24 drives the receiving plate 13 to move towards the cavity of the die-casting mechanism 5 until it is below the moving die 502. After the upper end of the ejector rod 504 contacts the ejector seat 503, the continuous upward movement of the moving die 502 causes the lower end of the ejector rod 504 to exert a downward pushing force on the casting, and the casting is pushed down and received by the receiving plate 13. Subsequently, the electric slide rail 24 drives the receiving plate 13 to move in the reverse direction to reset. Then, the second motor 17 drives the rotating rod 10 to rotate in the reverse direction. Under the transmission of the transmission assembly 12, the two screw rods 505 rotate in the reverse direction, so that the moving die 502 descends and resets. During the rotation of the rotating rod 10, the second gear 11 rotates synchronously with the rotating rod 10 and meshes with the first gear 9 corresponding to the rear holding furnace 3, so that the rotating plate 7 in the rear holding furnace 3 rotates, so that the two scraping rods 8 on the rotating plate 7 rotate around the axis of the rotating plate 7. Furthermore, the two scraping rods 8 can scrape the inner and outer walls of the lifting pipe 6 to reduce the solidification of the molten metal on the lifting pipe 6. Subsequently, the above die-casting process is continued to be repeated.

[0034] Before the molten metal in the rear holding furnace 3 is about to be exhausted, the front holding furnace 3 is filled with molten metal. After the molten metal in the rear holding furnace 3 is exhausted, the lifting platform 4 is driven to rise by the first hydraulic cylinder 15 until the lower end of the lifting pipe 6 is above the holding furnace 3. Then, the rotating platform 2 is driven to rotate by the first motor 16, so that the positions of the two holding furnaces 3 are swapped, that is, the holding furnace 3 initially in the front moves to the rear, and the holding furnace 3 initially in the rear moves to the front. During this process, the positions of the two first gears 9 will also be swapped. Subsequently, the first hydraulic cylinder 15 drives the lifting platform 4 to move in the reverse direction to reset, so that the lifting pipe 6 enters the holding furnace 3 currently in the rear. Subsequently, the holding furnace 3 currently in the rear can supply materials to the die-casting mechanism 5, and continue the low-pressure casting operation.

[0035] In order to facilitate the separation of the casting from the fixed mold 501, before the first casting, the die-casting mechanism 5 is kept in the open mold state. Then, the hydraulic cylinder two 23 drives the electric slide rail 24 and the receiving plate 13 to descend, so that the thumb cylinder 22 on the receiving plate 13 descends to a position suitable for clamping the sponge body 21. Next, the sponge body 21 is clamped by the thumb cylinder 22. Then, the hydraulic cylinder two 23 drives the electric slide rail 24 and the receiving plate 13 to move upward until the bottom surface of the sponge body 21 clamped by the thumb cylinder 22 is slightly higher than the top of the fixed mold 501. Subsequently, the electric slide rail 24 drives the receiving plate 13 to move towards the fixed mold 501 until the sponge body 21 reaches above the cavity of the fixed mold 501. Then, the sponge body 21 is released by the thumb cylinder 22, so that the release agent adsorbed on the sponge body 21 adheres to the fixed mold 501. After the release agent is applied to the fixed mold 501, the hydraulic cylinder two 23 drives the electric slide rail 24 and the receiving plate 13 to move downward, and the sponge body 21 is clamped again by the thumb cylinder 22. Then, the hydraulic cylinder two 23 drives the electric slide rail 24 and the receiving plate 13 to move upward, and the electric slide rail 24 drives the receiving plate 13 to move towards the placement box 20 until the sponge body 21 reaches above the placement box 20. Then, the sponge body 21 is released into the placement box 20 by the thumb cylinder 22.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes can be made therein without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low-pressure casting device for an aluminum alloy component, comprising a base (1), characterized in that: A turntable (2) is rotatably arranged on the base (1), two heat preservation furnaces (3) are arranged on the turntable (2), a lifting platform (4) located above the heat preservation furnace (3) is arranged on the base (1), a die-casting mechanism (5) is arranged on the lifting platform (4), the die-casting mechanism (5) comprises a fixed mold (501) and a movable mold (502) which can be lifted and moved relative to the fixed mold (501), a cavity is arranged between the movable mold (502) and the fixed mold (501), a liquid riser (6) is arranged at the bottom of the lifting platform (4), the top of the liquid riser (6) is connected to the cavity of the die-casting mechanism (5), the top of the heat preservation furnace (3) has a liquid riser port (301) for the liquid riser (6) to pass through, a rotating plate (7) is rotatably connected to the bottom of the heat preservation furnace (3), two scraping rods (8) are fixedly connected to the rotating plate (7), and the two scraping rods (8) The two gears (9) are respectively used to scrape the inner and outer tube walls of the liquid lifting tube (6). Two gears (9) are rotatably arranged between the bottom of the turntable (2) and the base (1). The two gears (9) are respectively coaxially arranged with the two turn plates (7). A rotating rod (10) is rotatably arranged on one side of the base (1). A gear (11) is fixedly connected to the lower end of the rotating rod (10). The gear (11) and the gear (9) are meshed and transmitted. A transmission assembly (12) is arranged between the rotating rod (10) and the die-casting mechanism (5). The transmission assembly (12) is used to transmit the rotation of the rotating rod (10) to the lifting of the movable mold (502) in the die-casting mechanism (5). A receiving plate (13) that can move closer to or farther from the die cavity of the die-casting mechanism (5) is arranged on the lifting platform (4). The receiving plate (13) is used to receive the casting completed by die-casting.

2. The low-pressure casting device for an aluminum alloy component according to claim 1, wherein: The die-casting mechanism (5) also includes a top seat (503) fixedly connected to the lifting platform (4), a pair of screw rods (505) and a pair of fixed rods (506) are respectively arranged on both sides of the bottom of the top seat (503), the movable mold (502) is located between the top seat (503) and the fixed mold (501), the movable mold (502) is threadedly connected to the two screw rods (505), and is slidably connected to the fixed rod (506), and a plurality of ejector rods (504) for ejecting castings are slidably connected to the movable mold (502).

3. The low-pressure casting device for an aluminum alloy component according to claim 2, wherein: The transmission assembly (12) comprises a gear three (1201), which is rotatably connected to the lifting platform (4), and the gear three (1201) and the rotating rod (10) are axially slidable splinedly connected, the bottom ends of the two screw rods (505) are fixedly connected with a gear four (1202), and a gear five (1203) is rotatably arranged on the lifting platform (4) between the gear four (1202) and the gear three (1201), and the two sides of the gear five (1203) are respectively meshed with the gear three (1201) and the gear four (1202) for transmission.

4. The low-pressure casting device for an aluminum alloy component according to claim 3, characterized in that: A guide frame (14) is fixedly connected to the base (1), and the lifting platform (4) is slidably connected to the guide frame (14). At least two hydraulic cylinders (15) are installed on the base (1), and the telescopic rods of the hydraulic cylinders (15) are fixedly connected to the bottom of the lifting platform (4). A motor (16) for driving the rotating platform (2) to rotate and a motor (17) for driving the rotating rod (10) to rotate are installed in the base (1).

5. The low-pressure casting device for an aluminum alloy component according to claim 4, characterized in that: A placement box (20) is provided at the top of the lifting platform (4) and below the receiving plate (13). A sponge body (21) is placed in the placement box (20). The sponge body (21) is a profiling structure matching the cavity contour of the die-casting mechanism (5). A release agent is adsorbed on the sponge body (21). A plurality of thumb cylinders (22) are provided at the bottom of the receiving plate (13). The thumb cylinders (22) are used to clamp the sponge body (21). A driving assembly is provided on the lifting platform (4). The driving assembly is used to drive the receiving plate (13) to move closer to or away from the cavity of the die-casting mechanism (5) and can drive the receiving plate (13) to lift relative to the placement box (20).

6. The low-pressure casting device for an aluminum alloy component according to claim 5, characterized in that: The driving assembly includes a second hydraulic cylinder (23) and an electric slide rail (24). At least two second hydraulic cylinders (23) are installed on both sides of the lifting platform (4). The telescopic rods of the second hydraulic cylinders (23) on the same side are commonly fixedly connected to the electric slide rail (24). The output ends of the two electric slide rails (24) are commonly fixedly connected to the bottom of the receiving plate (13).

7. The low-pressure casting device for an aluminum alloy component according to claim 6, characterized in that: A heat preservation cover (18) is fixedly connected to the bottom of the lifting platform (4). The heat preservation cover (18) is used to seal the liquid-rising port (301) of the heat preservation furnace (3).

8. A low-pressure casting device for an aluminum alloy component according to claim 7, characterized in that: An arc-shaped support rail (19) is fixedly connected to the base (1). The bottom of the turntable (2) has a chute matching the arc-shaped support rail (19). The opening of the arc-shaped support rail (19) faces the second gear (11).

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