A molten metal pouring system and a pouring process thereof

Abstract

This application relates to a molten metal casting system and its casting process. The molten metal casting system includes a frame, a drive vehicle, and a holding furnace. The frame is equipped with a slag removal station and a casting station, both with fixed platforms. The frame is equipped with a slag removal mechanism and a casting assembly. The casting assembly includes an upper mold, a lower mold, a lifting cylinder, a telescopic device, and a gas injector. A fixed frame is mounted on the frame, with the lower mold mounted on it. The lifting cylinder is located at the top of the fixed frame, and the upper mold is mounted on the output shaft of the lifting cylinder. The telescopic device is mounted at the bottom of the lower mold and connects to it. The gas injector is located on one side of the casting station. A part-removing assembly is provided on the fixed frame to assist in removing the product. The holding furnace is mounted on the drive vehicle, which is equipped with a drive mechanism for moving the holding furnace. The frame is equipped with a preheating assembly for preheating the mold and a slag-removing assembly. This application improves the forming quality of the molten metal casting system.

Description

Technical Field

[0001] This application relates to the field of molten metal casting technology, and in particular to a molten metal casting system and its casting process. Background Technology

[0002] Molten metal casting refers to the process of pouring molten metal (such as alloys of aluminum, copper, and iron) into a mold cavity that matches the shape and size of the part, and then allowing it to cool and solidify to obtain a casting. This is the core step in casting (i.e., liquid metal forming).

[0003] Chinese patent application CN221018653U discloses a casting structure for gravity casting of aluminum alloys, comprising a casting protective support, a casting drive mechanism installed at the bottom of the support, a casting mold movably mounted on the drive mechanism, and multiple sets of fitting sleeve holes and positioning holes on the upper surface of the mold. Each set of fitting sleeve holes has four positioning holes evenly distributed around its perimeter. A pressure cover box is located above the mold, with a spiral alloy solution injection pipe connected to its upper end. A lifting cylinder is connected to the center of the top surface of the pressure cover box. This invention, through the matching and insertion of the fitting sleeve holes, positioning holes, positioning pins, and fitting sleeves, ensures the accuracy and tightness of the connection, thereby preventing leakage at the connection point.

[0004] Regarding the aforementioned technologies, in the prior art, molten aluminum alloy enters the pressure cover box through a filling pipe and is evenly distributed into the pouring port through the dispensing chamber, allowing several fitting sleeves to be injected with molten aluminum alloy simultaneously. However, in the prior art, the molten aluminum alloy is injected from top to bottom, which easily leads to the air inside the fitting sleeve being swept away when the molten aluminum alloy falls, causing only a portion of the gas to be discharged, while the remaining gas remains inside the molten aluminum alloy. After cooling, it forms small pores, reducing the molding quality of the molten aluminum alloy casting structure. Summary of the Invention

[0005] In order to improve the forming quality of molten metal casting systems, this application provides a molten metal casting system and its casting process.

[0006] This application provides a molten metal casting system and its casting process, employing the following technical solution: A molten metal casting system includes a frame, a drive vehicle, and a holding furnace. The frame is equipped with a slag removal station and a casting station. Fixed platforms are located directly below both the slag removal station and the casting station. The frame is equipped with a slag removal mechanism and a casting assembly. The casting assembly includes an upper mold, a lower mold, a lifting cylinder, a telescopic device, and a gas injector. A fixed frame is located on the frame above the casting station. The lower mold is mounted on the fixed frame. The lifting cylinder is located at the top of the fixed frame. The upper mold is mounted on the output shaft of the lifting cylinder. The upper part is equipped with a demolding component to assist in product demolding. The telescopic device is installed at the bottom of the lower mold. The output end of the telescopic device is equipped with a telescopic pipe. The telescopic device is equipped with a blocking valve body to block the material supply of the telescopic pipe. The telescopic pipe is connected to the lower mold. The air injector is located on one side of the casting station. The fixed frame is equipped with a part-removing component to assist in removing the product. The heat preservation furnace is located on the drive vehicle. The heat preservation furnace is equipped with a top cover. The drive vehicle is equipped with a drive mechanism to move the heat preservation furnace. The frame is equipped with a preheating component for preheating the mold and a scum removal component.

[0007] Optionally, the driving mechanism includes a driving component and a limiting component. The limiting component includes a fixed base, a rotating rod, a limiting block, a first stop, a second stop, and a limiting seat. The fixed base is connected to the moving end of the driving component, and the driving component is used to drive the fixed base to move. One end of the rotating rod is rotatably connected to the fixed base, and the limiting block is connected to the other end of the rotating rod. The first stop is connected to the fixed base, and the limiting seat is connected to the surface of the heat preservation furnace. Two second stops are provided. When limiting, the limiting seat abuts against the first stop, and the other end of the rotating rod is located between the two second stops. The limiting block abuts against the side wall of the second stop away from the first stop.

[0008] Optionally, the drive assembly includes a drive motor, a drive screw, a nut block, and a limiting plate. The drive vehicle is provided with a moving slot. The limiting plate is connected to the drive vehicle and located above the moving slot. A gap is left between the limiting plate and the surface of the drive vehicle. The fixed seat is slidably fitted on the limiting plate. The drive screw is rotatably connected to the drive vehicle and located below the moving slot. The nut block is slidably fitted in the moving slot and threadedly fitted with the drive screw. The nut block is connected to the fixed seat. The drive motor is mounted on the drive vehicle and coaxially connected to the drive screw.

[0009] Optionally, the slag mechanism includes a lifting seat, a moving component for driving the lifting seat to move, a defoamer, a conveying component for conveying the defoamer, and a mixing component for mixing molten metal. The moving component is mounted on the frame, the lifting seat is mounted on the moving end of the moving component, a discharge box is provided on the lifting seat, the defoamer is filled in the discharge box, the discharge box is connected to the conveying end of the conveying component, and the mixing component is located at the end of the lifting seat.

[0010] Optionally, the moving component includes a rotating platform, a fixed column, and a lifting motor. The rotating platform is mounted on the frame, the fixed column is vertically connected to the rotating end of the rotating platform, the lifting seat is slidably fitted on the fixed column, the lifting motor is mounted on the top of the fixed column, the output shaft of the lifting motor is connected to the bottom of the fixed column through a sprocket and chain assembly, and the lifting seat is connected to the chain.

[0011] Optionally, the material conveying assembly includes a material conveying pipe, a rotating shaft, and a material conveying motor. The material conveying pipe is mounted on the lifting base, and an extension pipe is connected to the outlet of the material conveying pipe. The lifting base is provided with a cover to cover the heat preservation furnace, and the extension pipe passes through the cover. The material discharge box is mounted on the material conveying pipe and communicates with the interior of the material conveying pipe. The rotating shaft is rotatably connected inside the material conveying pipe, and a spiral arc plate is connected to the rotating shaft. The material conveying motor is mounted at one end of the material conveying pipe and is coaxially connected to the rotating shaft.

[0012] Optionally, the mixing assembly includes a stirring shaft and a stirring motor. The stirring shaft is vertically rotatably connected to one end of the lifting base. A stirring head is connected to the bottom end of the stirring shaft. The stirring shaft is hollow and its top end is connected to an external inert gas source. Several air outlet grooves are opened on the surface of the stirring head. The cover is rotatably connected to the stirring shaft. The stirring motor is mounted on the lifting base, and its output shaft is connected to the stirring shaft through a bevel gear set.

[0013] Optionally, the salvage assembly includes a fixed perforated plate, a rotating perforated plate, and a pushing cylinder. The fixed perforated plate is connected to the bottom of the cover and is rotatably connected to the stirring shaft. Both the rotating perforated plate and the cover are provided with rotating arc grooves. The rotating perforated plate is located below the fixed perforated plate. Several connecting columns are connected to the rotating perforated plate. A rotating ring is connected to the top of each connecting column. The rotating ring is rotatably connected to the bottom of the cover. One of the connecting columns passes through two of the rotating arc grooves. One end of the pushing cylinder is rotatably connected to the cover, and the other end is rotatably connected to the connecting column.

[0014] Optionally, the part-retrieving assembly includes a part-retrieving motor, a part-retrieving rod, and a support plate. One end of the part-retrieving rod is rotatably connected to a fixed frame, and the support plate is connected to the other end of the part-retrieving rod. The upper mold is located on the moving path of the support plate.

[0015] A molten metal casting process includes the following steps: S1, holding the molten metal: Melting the molten metal in each crucible and pouring it into a holding furnace using an overhead crane, and holding the molten metal in the holding furnace for heat treatment; S2, generating slag: The holding furnace is transported to the slag removal station by a drive mechanism, and impurities in the molten metal are floated to the surface of the molten metal using a slag removal mechanism, and the gas inside the molten metal is discharged from the molten metal; S3, removing slag: The slag on the surface of the molten metal is removed using a slag removal component; S4, preheating the upper and lower molds: The upper and lower molds are preheated using a preheating component. S5. Pouring molten metal: The upper mold is lowered by the lifting cylinder and the upper and lower molds are closed to form a cavity. The telescopic tube is inserted into the upper cover by the telescopic device and extends into the molten metal. Inert gas is injected into the heat preservation furnace by the gas injector. Under atmospheric pressure, the molten metal enters the cavity with the telescopic tube. After the cavity is filled with molten metal, the blocking valve body blocks the molten metal inside the telescopic tube until the molten metal solidifies. S6. Removing parts: After the product is formed, the product rises to the designated position with the upper mold. The demolding component removes the product from the upper mold. The part removal component catches the product and sends it out.

[0016] In summary, this application includes at least one of the following beneficial technical effects: During casting, molten metal is poured into a holding furnace, covered with a top cover for heat preservation, and then transported to the slag removal station by a drive mechanism. First, a slag-floating mechanism is used to float the residue inside the molten metal to the surface, forming slag. Then, a slag-removing component is used to remove the slag. After that, the top cover is covered, and the holding furnace is transported directly below the casting station. At the same time, a preheating component is used to preheat the upper and lower molds to the specified temperature. A telescopic device is used to drive the telescopic tube into the molten metal, and a lifting cylinder is used to drive the upper mold to descend and close the upper and lower molds. An inert gas injector injects inert gas into the holding furnace, and the molten metal is transported into the cavity under low pressure until the cavity is full. A shut-off valve is used to stop the transport of molten metal. After cooling, the product rises with the upper mold. After demolding by a demolding component, the product is held by a part-removing component and transferred to the outside of the fixed frame, thus completing the product casting. Inert gas is injected into the furnace by an air injector. Under atmospheric pressure, the molten metal enters the cavity from bottom to top through the telescopic tube. In this way, the air in the cavity is gradually squeezed out. Compared with the existing technology, this reduces the phenomenon of molten metal sweeping up air, reduces the phenomenon of residual air in molten metal, reduces the possibility of small pore defects in the product, and improves the product forming quality of the molten metal casting system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the molten metal casting system in the embodiments of this application.

[0018] Figure 2 This is a cross-sectional view used to illustrate the structure of the driving component in the embodiments of this application.

[0019] Figure 3 This is a schematic diagram of the structure of the limiting component in the embodiments of this application.

[0020] Figure 4 This is a schematic diagram of the scum floating mechanism in the embodiments of this application.

[0021] Figure 5 This is a cross-sectional view used in the embodiments of this application to illustrate the structure of the material conveying assembly.

[0022] Figure 6 This is a schematic diagram of the salvage component in an embodiment of this application.

[0023] Figure 7 This is a schematic diagram of the casting component in an embodiment of this application.

[0024] Figure 8 This is a schematic diagram of the structure of the part-retrieving component and the preheating component in the embodiments of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Slag removal station; 12. Casting station; 13. Fixed platform; 14. Slag removal platform; 2. Drive vehicle; 21. Holding furnace; 3. Drive mechanism; 31. Drive assembly; 311. Drive motor; 312. Drive screw; 313. Nut block; 314. Limiting plate; 32. Limiting assembly; 321. Fixed seat; 322. Rotating rod; 3221. Control lever; 323. Limiting block; 324. First stop block; 325. Second stop block; 326. Limiting seat; 4. Slag mechanism; 41. Lifting seat; 42. Moving assembly; 421. Rotating platform; 422. Fixed column; 423. Lifting motor; 4 3. Defoamer; 44. Material conveying assembly; 441. Material conveying pipe; 4411. Extension pipe; 4412. Discharge box; 442. Rotating shaft; 443. Material conveying motor; 45. Mixing assembly; 451. Agitating shaft; 4511. Agitating head; 4512. Cap; 452. Agitating motor; 5. Retrieving assembly; 51. Fixed perforated plate; 52. Rotating perforated plate; 53. Pushing cylinder; 6. Casting assembly; 61. Upper mold; 62. Lower mold; 63. Lifting cylinder; 64. Expansion joint; 65. Air injector; 7. Part taking assembly; 71. Part taking motor; 72. Part taking rod; 73. Support plate; 8. Preheating assembly; 81. Preheating rack; 82. Washer. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] This application discloses a molten metal casting system and its casting process. (Refer to...) Figure 1 The molten metal casting system includes a frame 1, a drive vehicle 2, and a holding furnace 21. The frame 1 is equipped with a slag removal station 11 and a casting station 12. Fixed platforms 13 are provided below both the slag removal station 11 and the casting station.

[0028] Reference Figure 1 The drive vehicle 2 is driven by a motor to rotate the rollers on the guide rail. The heat preservation furnace 21 is equipped with a top cover and two rows of rollers at the bottom. The drive vehicle 2 is equipped with a guide rail and the fixed platform 13 is equipped with a limiting rail. When the heat preservation furnace 21 moves, the guide rail and the limiting rail are flush.

[0029] Reference Figure 2 and Figure 3 The drive vehicle 2 is equipped with a drive mechanism 3, which includes a drive assembly 31 and a limiting assembly 32. The drive assembly 31 includes a drive motor 311, a drive screw 312, a nut block 313, and a limiting plate 314. A moving vehicle is provided with a moving groove. The limiting plate 314 is fixedly connected to the moving vehicle, with a gap between it and the surface of the moving vehicle, and covers the moving groove. The drive screw 312 is rotatably connected to the bottom of the drive vehicle 2 and located below the moving groove. The nut block 313 is slidably fitted in the moving groove and threadedly engaged with the drive screw 312. The drive motor 311 is mounted on the moving vehicle, and its output shaft is coaxially connected to the drive screw 312.

[0030] Reference Figure 2 and Figure 3 The limiting component 32 includes a fixed base 321, a rotating rod 322, a limiting block 323, a first stop 324, a second stop 325, and a limiting seat 326. The fixed base 321 is slidably fitted onto the limiting plate 314 and is fixedly connected to the nut block 313. One end of the rotating rod 322 is rotatably connected to the fixed base 321, and a control lever 3221 is welded onto the rotating rod 322. The limiting block 323 is fixedly connected to the other end of the rotating rod 322. Several first stops 324 are provided, and all are fixedly connected to the fixed base 321. The limiting seat 326 is welded to the surface of the heat preservation furnace 21, and two second stops 325 are provided, both of which are fixedly connected to the limiting seat 326.

[0031] During operation, the drive vehicle 2 moves, aligning the guide rail with the limiting rail. The limiting seat 326 abuts against the first stop 324. The control lever 3221 is then activated, causing the rotating rod 322 to rotate. The rotating rod 322 moves between the two second stops 325 until the second stops 325 are positioned between the limiting block 323 and the first stop 324, thus limiting the heat preservation furnace 21. Subsequently, the drive motor 311 is activated, driving the screw 312 to rotate. The nut block 313 moves, causing the fixed seat 321 to move. Through the limiting component 32, the heat preservation furnace 21 is moved until it enters the slag removal station 11, achieving the effect of driving the heat preservation furnace 21 to move.

[0032] Reference Figure 1 and Figure 4 The frame 1 is equipped with a scum-floating mechanism 4, which includes a lifting seat 41, a moving component 42, a defoamer 43, a conveying component 44, and a mixing component 45. The moving component 42 includes a rotating table 421, a fixed column 422, and a lifting motor 423. The rotating table 421 is mounted on the frame 1, and the fixed column 422 is vertically fixed to the rotating end of the rotating table 421. The lifting seat 41 is vertically slidably fitted onto the fixed column 422. The lifting motor 423 is mounted on the top of the fixed column 422, and a sprocket and chain assembly is installed between the output shaft of the lifting motor 423 and the bottom end of the fixed frame. The lifting seat 41 is mounted on the chain.

[0033] refer to Figure 4 The mixing assembly 45 includes a stirring shaft 451 and a stirring motor 452. The stirring shaft 451 is vertically rotatably connected to one end of the lifting base 41. The stirring shaft 451 is hollow, with its top end connected to an external inert gas source (argon gas). A stirring head 4511 is fixedly connected to its bottom end, and the stirring head 4511 has several gas outlet slots that connect to the interior of the stirring shaft. The stirring motor 452 is mounted on the lifting base 41, and its output shaft is connected to the stirring shaft 451 via a bevel gear set.

[0034] Reference Figure 4 and Figure 5 The feeding assembly 44 includes a feeding pipe 441, a rotating shaft 442, and a feeding motor 443. A cover 4512 is rotatably connected to the agitator shaft 451. The feeding pipe 441 is mounted on the lifting base 41, and an extension pipe 4411 is fixedly connected to the outlet end of the feeding pipe 441, passing through the cover 4512. A discharge box 4412 is fixedly connected to the feeding pipe 441, communicating with the interior of the feeding pipe 441. Defoamer 43 is placed inside the discharge box 4412 and is used to eliminate air bubbles inside the molten metal. The rotating shaft 442 is rotatably connected inside the feeding pipe 441, and a spiral arc plate is welded to the surface of the rotating shaft 442. The feeding motor 443 is mounted on the lifting base 41, and its output shaft is coaxially connected to the end of the rotating shaft 442.

[0035] Reference Figure 4 and Figure 6 The cover 4512 is equipped with a retrieval assembly 5, which includes a fixed perforated plate 51, a rotating perforated plate 52, and a pushing cylinder 53. Several stabilizing posts are fixedly connected to the surface of the fixed perforated plate 51, which is fixedly connected to the bottom of the cover plate via these posts and rotatably connected to the stirring shaft 451. The rotating perforated plate 52 is located below the fixed perforated plate 51, and the holes on the rotating perforated plate 52 correspond one-to-one with the holes on the fixed perforated plate 51. Both the fixed perforated plate 51 and the cover 4512 have rotating arc grooves. A connecting post is fixedly connected to the rotating perforated plate 52, and a rotating ring is fixedly connected to the top of the connecting post. The rotating ring is rotatably connected to the bottom of the cover 4512. One of the connecting posts passes through two rotating arc grooves and extends above the cover 4512. One end of the pushing cylinder 53 is rotatably connected to the cover 4512, and the other end is rotatably connected to the connecting post.

[0036] Reference Figure 4 A slag removal platform 14 is provided on the frame 1. The slag removal platform 14 is located directly below the initial position of the retrieval component 5. The slag removal platform 14 is used to assist in collecting and cleaning slag.

[0037] During slag removal, the top cover of the holding furnace 21 is removed by a gantry crane. Then, the rotating platform 421 is activated, causing the fixed column 422 to rotate, which in turn rotates the rotating seat until the cover 4512 is directly above the holding furnace 21. The lifting motor 423 is then activated, lowering the lifting seat 41 until the cover 4512 covers the holding furnace 21. The conveying motor 443 is activated, causing the rotating shaft 442 to rotate. The rotating arc plate pushes the defoaming agent 43 into the holding furnace 21. Simultaneously, the stirring motor 452 is activated, causing the stirring shaft 451 to rotate, which in turn rotates the stirring head 4511. An external inert gas source is introduced through the stirring... The moving shaft 451 provides inert gas to the holding furnace 21. The inert gas floats in the molten metal in the form of bubbles, carrying away the gas and slag in the molten metal. The defoamer 43 eliminates the gas, and the slag is suspended on the surface of the molten metal. At the same time, the fixed orifice plate 51 and the rotating orifice plate 52 move with the sealing plate and enter the molten metal. After the slag has been floating for a period of time, the pushing cylinder 53 is activated to rotate the rotating orifice plate 52 by a specified angle to reduce the area of ​​the holes on the fixed orifice plate 51. In conjunction with the lifting motor 423, the slag is scooped out and falls onto the slag removal platform 14 for easy cleaning and collection by the staff.

[0038] Reference Figure 7The frame 1 is equipped with a casting assembly 6, which includes an upper mold 61, a lower mold 62, a lifting cylinder 63, a telescopic device 64, and a gas injector 65. A fixed frame is fixedly connected to the frame 1, and the lower mold 62 is fixedly connected to the fixed frame. The telescopic device 64 is fixedly connected to the bottom of the lower mold 62, and a telescopic tube is provided on the telescopic device 64. The top of the telescopic tube is connected to the lower mold 62, and the telescopic device 64 has a built-in blocking valve body to block the material supply inside the telescopic tube. The gas injector 65 is located on one side of the fixed platform 13 and is used to provide inert gas, which is argon, to the holding furnace 21. The upper mold 61 is slidably fitted on the fixed frame, and the lifting cylinder 63 is installed on the top of the fixed frame, with its output shaft fixedly connected to the upper mold 61. The lifting cylinder 63 is a hydraulic cylinder. The upper mold 61 is equipped with a demolding assembly, which is a combination of hydraulic cylinders, ejector pins, and other components to detach the product from the upper mold 61.

[0039] Reference Figure 8 The fixed frame is equipped with a part-retrieving assembly 7, which includes a part-retrieving motor 71, a part-retrieving rod 72, and a support plate 73. One end of the part-retrieving rod 72 is rotatably connected to the fixed frame, and the support plate 73 is fixedly connected to the other end of the part-retrieving rod 72. The upper mold 61 is located on the moving path of the support plate 73. The part-retrieving motor 71 is mounted on the fixed frame and fixedly connected to one end of the part-retrieving rod 72.

[0040] During casting, the lifting cylinder 63 drives the upper mold 61 to descend, closing the lower mold 62 and forming a cavity. The top cover of the holding furnace 21 is removed by the overhead crane and moved to the fixed platform 13 below the lower mold 62 by the drive mechanism 3. The telescopic tube is extended into the holding furnace 21 through the telescopic device 64, and at the same time, the inert gas is injected into the holding furnace 21 by the gas injector 65. Under atmospheric pressure, the molten metal rises with the telescopic tube until it fills the cavity. The blocking valve body blocks the molten metal. After cooling, the product rises with the upper mold 61. At the same time, the part-removing motor 71 is started, causing the part-removing rod 72 to rotate. The support plate 73 moves to the bottom of the upper mold 61. The demolding component is used to remove the product from the upper mold 61. The product falls onto the support plate 73 and can then be transferred to the outside of the fixed frame area, achieving the effect of automatic casting and part removal.

[0041] Reference Figure 8 To reduce product defects, a preheating assembly 8 is provided on the frame 1. The preheating assembly 8 includes a preheating frame 81 and washers 82. Several washers 82 are placed on the lower mold 62 and are used to elevate the preheating frame 81. The preheating frame 81 is rectangular in shape, with several heating holes at its top and bottom. Extension columns are provided on the side walls of the preheating frame 81, connecting the oxygen source and the combustion gas source. The combustion gas is liquefied petroleum gas (LPG).

[0042] During preheating, oxygen and combustion gas are connected and the combustion gas is ignited, so that the flame is ejected through the heating control to simultaneously heat the upper mold 61 and the lower mold 62, thereby achieving the effect of preheating the upper mold 61 and the lower mold 62.

[0043] In this embodiment, the product is an aluminum alloy end cap, the molten metal is aluminum alloy liquid, and the top of the end cap has several reinforcing ribs. The reinforcing ribs are formed in the upper mold 61. In this way, the contact area between the product and the upper mold 61 is large and the adhesion is stronger, so the product is lifted and demolded by the upper mold 61.

[0044] The implementation principle of a molten metal casting system according to an embodiment of this application is as follows: During casting, a preheating frame 81 is placed between an upper mold 61 and a lower mold 62, and an oxygen source and a combustion gas source are connected. After igniting the combustion gas source, the upper mold 61 and the lower mold 62 are preheated. First, the holding furnace 21 is transported to the slag removal station 11 using the drive mechanism 3. The rotating table 421 rotates the lifting seat 41, and in conjunction with the lifting motor 423, the cover 4512 covers the holding furnace 21. The conveying motor 443 is started, and the rotating shaft 442 drives the arc plate to rotate, allowing the defoamer 43 to enter the holding furnace 21. At the same time, the external inert gas source supplies gas to the molten metal through the stirring shaft 451. The inert gas rises in the form of bubbles, carrying out impurities and internal gases. The stirring motor 452 drives the stirring shaft 451 to rotate, thereby agitating the molten metal. Impurities are suspended on the surface of the molten metal. The push cylinder 53 is started, and the rotating orifice plate 52 rotates to compress the metal. After a specified time, the cover 4512 on the small fixed perforated plate 51 is lifted. The fixed perforated plate 51 and the rotating perforated plate 52 work together to remove the slag and transfer it to the slag removal platform 14. Then, the holding furnace 21 is transported to the fixed platform 13 below the lower mold 62 by the drive mechanism 3. The lifting rod is started, the upper mold 61 closes the lower mold 62, and the telescopic device 64 drives the telescopic tube into the molten metal. The gas injector 65 injects inert gas into the holding furnace 21. Under atmospheric pressure, the molten metal enters the lower mold 62 through the telescopic tube and gradually fills the cavity from bottom to top. Then, the molten metal supply is stopped by the blocking valve. After cooling, the upper mold 61 rises, driving the product to rise. The part removal motor 71 is started, and the support plate 73 is moved to the lower part of the upper mold 61. The demolding component is used to remove the product from the upper mold 61. The product falls onto the support plate 73, and the product is sent out of the mold, realizing the product casting process.

[0045] Inert gas is injected into the heat preservation furnace 21 by the gas injector 65. Under atmospheric pressure, the molten metal enters the cavity from bottom to top through the telescopic tube. In this way, the air in the cavity will be gradually squeezed out. Compared with the existing technology, the phenomenon of molten metal sweeping up air is reduced, the phenomenon of residual air in molten metal is reduced, the possibility of small pore defects in the product is reduced, and the product forming quality of molten metal casting system is improved.

[0046] The process of pouring molten metal includes the following steps: S1. Insulating molten metal: Using a crane, the molten metal in each crucible is poured into the insulating furnace 21 to continuously heat the molten metal.

[0047] The heat supply furnace 21 is used to heat the molten metal, keeping it in a liquid state in preparation for casting products.

[0048] S2. Generation of slag: The holding furnace 21 is transported to the slag removal station 11 by the drive mechanism 3. The arc plate is rotated by the feeding motor 443 to supply defoaming agent 43 to the holding furnace 21. At the same time, the stirring motor 452 drives the stirring shaft 451 to rotate. An external inert gas source provides inert gas to the molten metal, so that slag is formed on the surface of the molten metal.

[0049] S3. Removing scum: Before lifting the cover 4512, start the push cylinder 53 to move the rotating orifice plate 52 to reduce the area of ​​the holes on the fixed orifice plate 51. Then, after the cover 4512 is lifted, the rotating orifice plate 52 and the fixed orifice plate 51 work together to remove the scum from the surface of the molten metal and transport the scum to the slag removal platform 14.

[0050] S4. Preheating the upper mold 61 and the lower mold 62: Place the gasket 82 on the lower mold 62, place the preheating rack 81 on the gasket 82, connect oxygen and combustible gas on the preheating rack 81, and ignite the combustible gas to heat the upper mold 61 and the lower mold 62 with the flame.

[0051] S5. Pouring molten metal: The holding furnace 21 is transported to the fixed platform 13 below the lower mold 62 by the drive mechanism 3. The upper mold 61 closes the lower mold 62 by the lifting cylinder 63. The telescopic tube is extended into the holding furnace 21 by the telescopic device 64. Inert gas is injected into the holding furnace 21 by the gas injector 65. Under atmospheric pressure, the molten metal enters the lower mold 62 through the telescopic tube to gradually fill the cavity until the molten metal solidifies.

[0052] S6. Picking up the product: After the product is formed, the upper mold 61 is lifted, and the support plate 73 is moved to the underside of the upper mold 61 by the picking motor 71. The product is then removed from the upper mold 61 by the demolding component and falls onto the support plate 73, thus sending the product out.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A molten metal casting system, characterized in that: The system includes a frame (1), a drive vehicle (2), and a heat preservation furnace (21). The frame (1) is equipped with a slag removal station (11) and a casting station (12). A fixed platform (13) is provided at both the slag removal station (11) and directly below the casting station (12). The frame (1) is equipped with a slag removal mechanism (4) for removing slag and a casting assembly (6). The casting assembly (6) includes an upper mold (61), a lower mold (62), a lifting cylinder (63), a telescopic device (64), and a gas injector (65). A fixed frame is provided on the frame (1). The fixed frame is located above the casting station (12). The lower mold (62) is installed on the fixed frame. The lifting cylinder (63) is located at the top of the fixed frame. The upper mold (61) is installed on the output shaft of the lifting cylinder (63). The upper mold (61) is provided with a demolding component to assist in product demolding. The telescopic device (64) is installed at the bottom of the lower mold (62). The output end of the telescopic device (64) is provided with a telescopic pipe. The telescopic device (64) is provided with a blocking valve body to block the material supply of the telescopic pipe. The telescopic pipe is connected to the lower mold (62). The air injector (65) is provided on one side of the casting station (12). The fixed frame is provided with a part-removing component (7) to assist in removing the product. The heat preservation furnace (21) is provided on the drive vehicle (2). The heat preservation furnace (21) is provided with a top cover. The drive vehicle (2) is provided with a drive mechanism (3) to drive the heat preservation furnace (21) to move. The frame (1) is provided with a preheating component (8) for preheating the mold and a slag-removing component (5).

2. The molten metal casting system according to claim 1, characterized in that: The driving mechanism (3) includes a driving assembly (31) and a limiting assembly (32). The limiting assembly (32) includes a fixed base (321), a rotating rod (322), a limiting block (323), a first stop (324), a second stop (325), and a limiting seat (326). The fixed base (321) is connected to the moving end of the driving assembly (31), and the driving assembly (31) is used to drive the fixed base (321) to move. One end of the rotating rod (322) is rotatably connected to the fixed base (321), and the limiting block (323) is connected to the moving end of the driving assembly (31). Connected to the other end of the rotating rod (322), the first stop (324) is connected to the fixed seat (321), the limiting seat (326) is connected to the surface of the heat preservation furnace (21), and the second stop (325) is connected to the limiting seat (326). Two blocks are provided. When limiting, the limiting seat (326) abuts against the first stop (324), the other end of the rotating rod is located between the two second stops (325), and the limiting block (323) abuts against the side wall of the second stop (325) away from the first stop (324).

3. The molten metal casting system according to claim 2, characterized in that: The drive assembly (31) includes a drive motor (311), a drive screw (312), a nut block (313), and a limiting plate (314). The drive vehicle (2) is provided with a moving slot. The limiting plate (314) is connected to the drive vehicle (2) and is located above the moving slot. The limiting plate (314) has a gap with the surface of the drive vehicle (2). The fixed seat (321) is slidably fitted on the limiting plate (314). The drive screw (312) is rotatably connected to the drive vehicle (2) and is located below the moving slot. The nut block (313) is slidably fitted in the moving slot and is threadedly fitted with the drive screw (312). The nut block (313) is connected to the fixed seat (321). The drive motor (311) is mounted on the drive vehicle (2) and is coaxially connected with the drive screw (312).

4. The molten metal casting system according to claim 1, characterized in that: The slag mechanism (4) includes a lifting seat (41), a moving component (42) for driving the lifting seat (41) to move, a defoamer (43), a conveying component (44) for conveying the defoamer (43), and a mixing component (45) for mixing molten metal. The moving component (42) is mounted on the frame (1). The lifting seat (41) is mounted on the moving end of the moving component (42). A discharge box (4412) is provided on the lifting seat (41). The defoamer (43) is filled in the discharge box (4412). The discharge box (4412) is connected to the conveying end of the conveying component (44). The mixing component (45) is located at the end of the lifting seat (41).

5. The molten metal casting system according to claim 4, characterized in that: The moving component (42) includes a rotating platform (421), a fixed column (422), and a lifting motor (423). The rotating platform (421) is mounted on the frame (1). The fixed column (422) is vertically connected to the rotating end of the rotating platform (421). The lifting seat (41) is slidably fitted on the fixed column (422). The lifting motor (423) is mounted on the top of the fixed column (422). The output shaft of the lifting motor (423) is connected to the bottom end of the fixed column (422) through a sprocket and chain assembly. The lifting seat (41) is connected to the chain.

6. The molten metal casting system according to claim 4, characterized in that: The feeding assembly (44) includes a feeding pipe (441), a rotating shaft (442), and a feeding motor (443). The feeding pipe (441) is installed on the lifting seat (41). An extension pipe (4411) is connected to the outlet of the feeding pipe (441). A cover (4512) covering the heat preservation furnace (21) is provided on the lifting seat (41). The extension pipe (4411) passes through the cover (4512). The discharge box (4412) is installed on the feeding pipe (441) and communicates with the inside of the feeding pipe (441). The rotating shaft (442) is rotatably connected inside the feeding pipe (441). A spiral arc plate is connected to the rotating shaft (442). The feeding motor (443) is installed at one end of the feeding pipe (441) and is coaxially connected with the rotating shaft (442).

7. The molten metal casting system according to claim 6, characterized in that: The mixing assembly (45) includes a stirring shaft (451) and a stirring motor (452). The stirring shaft (451) is vertically rotatably connected to one end of the lifting seat (41). A stirring head (4511) is connected to the bottom end of the stirring shaft (451). The stirring shaft (451) is hollow and its top end is connected to an external inert gas source. Several air outlet grooves are opened on the surface of the stirring head (4511). The cover (4512) is rotatably connected to the stirring shaft (451). The stirring motor (452) is installed on the lifting seat (41), and its output shaft is connected to the stirring shaft (451) through a bevel gear set.

8. The molten metal casting system according to claim 7, characterized in that: The salvage assembly (5) includes a fixed perforated plate (51), a rotating perforated plate (52), and a pushing cylinder (53). The fixed perforated plate (51) is connected to the bottom of the cover (4512) and is rotatably connected to the stirring shaft (451). The rotating perforated plate (52) and the cover (4512) are both provided with rotating arc grooves. The rotating perforated plate (52) is located below the fixed perforated plate (51). Several connecting columns are connected to the rotating perforated plate (52). A rotating ring is connected to the top of the connecting column. The rotating ring is rotatably connected to the bottom of the cover (4512). One of the connecting columns passes through two of the rotating arc grooves. One end of the pushing cylinder (53) is rotatably connected to the cover (4512), and the other end is rotatably connected to the connecting column.

9. The molten metal casting system according to claim 1, characterized in that: The part-retrieving assembly (7) includes a part-retrieving motor (71), a part-retrieving rod (72), and a support plate (73). One end of the part-retrieving rod (72) is rotatably connected to a fixed frame, and the support plate (73) is connected to the other end of the part-retrieving rod (72). The upper mold (61) is located on the moving path of the support plate (73).

10. The casting process of any one of the molten metal casting systems according to claims 1-7, characterized in that: Includes the following steps: S1, heat preservation molten metal: Melt the molten metal in each crucible and use the overhead crane to pour the molten metal in the crucible into the heat preservation furnace (21) and use the heat preservation furnace (21) to heat preservation treatment of the molten metal; S2. Floating slag: The holding furnace (21) is transported to the slag removal station (11) by the drive mechanism (3). The slag floating mechanism (4) is used to float all the impurities in the molten metal to the surface of the molten metal and to discharge the gas inside the molten metal. S3. Salvage: Use the salvage component (5) to remove the scum from the surface of the molten metal. S4. Preheat the upper mold (61) and lower mold (62): Use the preheating component (8) to bring the temperature of the upper mold (61) and lower mold (62) to the specified requirements; S5. Pouring molten metal: The upper mold (61) is lowered by the lifting cylinder (63) and the upper and lower molds (62) are closed to form a cavity. The telescopic tube is inserted into the upper cover by the telescopic device (64) and extends into the molten metal. Inert gas is injected into the heat preservation furnace (21) by the gas injector (65). Under atmospheric pressure, the molten metal enters the cavity with the telescopic tube. After the cavity is filled with molten metal, the molten metal inside the telescopic tube is blocked by the blocking valve until the molten metal solidifies. S6. Picking up the product: After the product is formed, the product rises to the designated position with the upper mold (61). The demolding component removes the product from the upper mold (61), and the product is caught by the picking component (7) and sent out.

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