Aluminum alloy casting device and method

Abstract

The invention belongs to the technical field of alloy casting processes, and particularly relates to an aluminum alloy casting device and method.The aluminum alloy casting device comprises a base table, feeding rollers installed on the two sides of the base table, a plate frame installed on the base table, an air cylinder installed on the plate frame, a kettle cover connected to the output end of the air cylinder, a kettle body conveyed to the bottom of the plate frame through the feeding rollers, and the kettle cover connected with the kettle body in a matched mode; the kettle cover is connected with a partition plate through a retractable air bag, the partition plate extends into the kettle body, and a liquid storage tank and an air supply assembly are mounted on the plate frame. The ball grooves in the two sets of guide rods are alternately formed, when the gas output of one set of gas nozzles is reduced, the gas output of the other set of gas nozzles is increased, and the gas flow difference formed by the gas nozzles on the two sides guides mixed gas to flow towards one side of the top layer of molten aluminum; along with continuous upward movement of the gas inlet sleeve, the gas outlet amount of the two groups of gas nozzles alternately changes, and the gas flow difference guides the mixed gas to flow towards the other side of the top layer of the molten aluminum, so that hydrogen near the liquid level of the molten aluminum is effectively removed, and local hydrogen residue on the liquid level is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of alloy casting technology, and in particular relates to an aluminum alloy casting device and method. Background Art

[0002] Aluminum alloy casting is a key link in the manufacturing of aluminum alloy parts, involving the entire process from melting, purification, pouring to solidification and forming.

[0003] During the aluminum alloy smelting process, the molten aluminum reacts with water vapor (such as moisture from moist furnace charge, tools, or the atmosphere), generating hydrogen that dissolves in the molten aluminum. The solubility of hydrogen in molten aluminum increases significantly with increasing temperature, but drops sharply during solidification. This can cause hydrogen to precipitate during solidification, forming needle-shaped or circular pores (especially subcutaneous pores), which significantly reduce the density and mechanical properties of the casting.

[0004] Therefore, the aluminum alloy needs to be degassed during the smelting process. Conventional degassing involves introducing argon or a chlorine / nitrogen mixture into the molten aluminum to remove hydrogen. This conventional method involves injecting the mixed gas into the molten aluminum, where it diffuses and reacts with the hydrogen in the molten aluminum. However, this method fails to guide the mixed gas, leaving residual hydrogen in areas of the molten aluminum with high hydrogen content. This is typically at the aluminum surface. Incomplete removal of hydrogen at the surface can lead to the formation of localized pores on the surface during solidification. Summary of the Invention

[0005] The purpose of the present invention is to provide an aluminum alloy casting device and method to solve the technical problems in the prior art.

[0006] The purpose of the present invention can be achieved through the following technical solutions: an aluminum alloy casting device, which includes a base, feed rollers are installed on both sides of the base, a plate rack is installed on the base, a cylinder is installed on the plate rack, the output end of the cylinder is connected to the kettle cover, the feed rollers transport the kettle body to the bottom of the plate rack, the kettle cover is cooperatively connected to the kettle body, the kettle cover is connected to the partition through a shrinkable air bag, and the partition extends into the kettle body; a liquid storage tank and an air supply component are installed on the plate rack, a composite hose is installed on the air supply component, the composite hose is installed on the kettle cover, and the air supply component is connected to the shrinkable air bag through the composite hose; a liquid pipe is installed on the liquid storage tank, and the liquid pipe passes through the shrinkable air bag and is connected to the partition; an air nozzle is installed on the partition, an air inlet sleeve is installed on the partition, and the air nozzle It is connected to the air intake sleeve, and a guide rod is installed on the kettle cover. The guide rod and the air intake sleeve are slidably matched, and the air inlet is installed on the air intake sleeve; the guide rod and the air intake sleeve are located inside the retractable airbag, and a resettable stop sleeve is slidably installed inside the air intake sleeve, a telescopic ball head is installed on the stop sleeve, and a ball groove is provided on the guide rod. The guide rod and the stop sleeve are connected by the telescopic ball head and the ball groove. As the stop sleeve moves downward, the stop sleeve blocks the air inlet, and the diameter of the air inlet is reduced; the air nozzles are arranged in two groups, and the two groups of air nozzles are respectively arranged on both sides of the partition, and the air intake sleeves corresponding to the two groups of air nozzles are set with the same specifications, and the guide rods corresponding to the two groups of air nozzles are the same length, but the opening positions of the ball grooves on the guide rods are different, and the ball grooves on the two groups of guide rods are opened alternately.

[0007] As a further optimization or improvement of this solution, an electromagnetic suction cup is installed on the partition, and a metal plate is installed on the bottom of the kettle cover, and the electromagnetic suction cup attracts the metal plate.

[0008] As a further optimization or improvement of this solution, a longitudinal slide groove is provided on the air inlet sleeve, a retaining sleeve is slidably installed in the longitudinal slide groove, and the retaining sleeve is connected to the inner wall of the longitudinal slide groove through a strip spring.

[0009] As a further optimization or improvement of this solution, the kettle cover is connected to the partition through a return spring, and the kettle cover is connected to the kettle body through a sealing gasket.

[0010] As a further optimization or improvement of this solution, an exhaust pipe is installed on the kettle cover, a vent pipe is installed on the partition, the exhaust pipe and the vent pipe are slidably matched, and an air hole plate is installed on the partition, and the air hole plate is connected to the vent pipe.

[0011] As a further optimization or improvement of this solution, a vent hole is provided on the exhaust pipe, a threaded groove rod is fixedly installed in the vent pipe, a rotating plate is rotatably installed on the exhaust pipe, an exhaust hole is provided on the rotating plate, a telescopic ball head 2 is installed on the rotating plate, the telescopic ball head 2 is slidably matched with the threaded groove on the threaded groove rod, the rotating plate is connected to the inner wall of the exhaust pipe through an arc spring, and a ball block is installed on the threaded groove on the threaded groove rod.

[0012] An aluminum alloy casting method, which is applied to the aluminum alloy casting device as described above, comprises the following steps: Step S1: The feeding roller conveys the kettle body to the bottom of the plate rack, and then the cylinder drives the kettle cover to press the kettle cover against the kettle body, and the kettle cover and the kettle body are sealed by the sealing gasket on the kettle cover; Step S2: The aluminum liquid in the liquid storage tank is transported to the bottom of the kettle through the liquid pipe, and at the same time, the mixed gas in the gas supply component is passed into the shrinkable airbag through the composite hose; Step S3: When the interior of the collapsible airbag is filled with the mixed gas, the mixed gas enters the air inlet sleeve through the air inlet, and then the mixed gas is filled into the kettle through the air nozzle, so that the mixed gas reacts with the hydrogen in the aluminum liquid, thereby removing the hydrogen in the aluminum liquid; Step S4: As the amount of molten aluminum injected increases, the air nozzle sinks into the molten aluminum. At the same time, the molten aluminum begins to push the partition upward, and the collapsible airbag is compressed. During this process, the partition drives the air inlet sleeve and the baffle sleeve to move synchronously. Step S5: As the air intake sleeve moves upward, the telescopic ball head on the retaining sleeve engages with the ball groove on the guide rod, and the guide rod and the retaining sleeve are temporarily connected; Step S6: As the air intake sleeve continues to move upward, the retaining sleeve slides along the longitudinal groove, and the strip spring is compressed. At this time, the retaining sleeve blocks the air intake, and the amount of mixed gas entering the air intake sleeve is reduced, and the air output of the corresponding air nozzle is reduced; Step S7: When the strip spring is compressed to its limit, the telescopic ball head 1 disengages from the ball groove, and the retaining sleeve returns to its original position under the action of the strip spring. At this time, the amount of mixed gas entering the intake sleeve increases. As the intake sleeve continues to move, the telescopic ball head 1 on the retaining sleeve engages with the next set of ball grooves, and the above operation is repeated; Step S8: Since the ball grooves on the two sets of guide rods are alternately provided, when the gas output of one set of gas nozzles decreases, the gas output of the other set of gas nozzles increases. The airflow difference formed by the gas nozzles on both sides guides the mixed gas to flow toward one side of the top layer of the molten aluminum. As the air inlet sleeve continues to move upward, the gas output of the two sets of gas nozzles changes alternately, and the airflow difference guides the mixed gas to flow to the other side of the top layer of the molten aluminum.

[0013] Beneficial effects of the present invention: (1) The present invention alternately opens ball grooves on two groups of guide rods. When the gas output of one group of gas nozzles decreases, the gas output of the other group of gas nozzles increases. The air flow difference formed by the gas nozzles on both sides guides the mixed gas to flow to one side of the top layer of the aluminum liquid. As the air inlet sleeve continues to move upward, the gas output of the two groups of gas nozzles changes alternately. The air flow difference guides the mixed gas to flow to the other side of the top layer of the aluminum liquid, thereby effectively removing hydrogen near the liquid surface of the aluminum liquid and avoiding local hydrogen residue on the liquid surface.

[0014] (2) In the initial state of the present invention, the mixed gas is injected into the kettle body and the exhaust pipe is in a blocked state, thereby preventing the mixed gas from overflowing through the exhaust pipe. As the amount of aluminum liquid injected increases, the exhaust pipe is connected to the vent pipe. Since the molecular weight of hydrogen chloride gas is smaller than that of chlorine, the hydrogen chloride gas inside the kettle body is located on the top of the chlorine gas, and the hydrogen chloride gas is discharged from the kettle body through the vent pipe and the exhaust pipe. As the threaded groove rod moves upward, the exhaust pipe is blocked again, thereby preventing the chlorine gas at the bottom of the hydrogen chloride gas from being discharged through the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a cross-sectional view of the overall structure of the present invention.

[0018] Figure 3 Schematic diagram of the internal structure of the collapsible airbag.

[0019] Figure 4 for Figure 3 A magnified view of the structure of part A.

[0020] Figure 5 This is the matching diagram of the guide rod and the air intake sleeve.

[0021] Figure 6 Schematic diagram of the connection structure between the guide rod and the air intake sleeve.

[0022] Figure 7 for Figure 3 A magnified view of the structure of part B.

[0023] Figure 8 Schematic diagram of the connection between the threaded groove rod and the exhaust pipe.

[0024] Figure 9 Schematic diagram of the connection structure between the rotating plate and the exhaust pipe.

[0025] The following are marked in the figure: 1. Base; 2. Plate rack; 3. Feed roller; 4. Liquid storage tank; 5. Cylinder; 6. Air supply assembly; 7. Kettle cover; 8. Kettle body; 9. Partition; 10. Retractable airbag; 11. Air nozzle; 12. Air inlet sleeve; 13. Guide rod; 14. Ball groove; 15. Stop sleeve; 16. Air inlet; 17. Longitudinal slide; 18. Bar spring; 19. Telescopic ball head 1; 20. Vent pipe; 21. Exhaust pipe; 22. Threaded groove rod; 23. Vent hole; 24. Turn plate; 25. Exhaust hole; 26. Telescopic ball head 2; 27. Ball block; 28. Arc spring; 29. ​​Electromagnetic suction cup; 30. Metal plate; 31. Composite hose; 32. Liquid pipe; 33. Return spring; 34. Air hole plate. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] See also Figures 1-6 , an aluminum alloy casting device, which includes a base 1, feed rollers 3 are installed on both sides of the base 1, a plate rack 2 is installed on the base 1, a cylinder 5 is installed on the plate rack 2, the output end of the cylinder 5 is connected to the kettle cover 7, the feed roller 3 transports the kettle body 8 to the bottom of the plate rack 2, the kettle cover 7 is connected to the kettle body 8, the kettle cover 7 is connected to the partition 9 through the shrinkable airbag 10, and the partition 9 extends into the kettle body 8; a liquid storage tank 4 and an air supply component 6 are installed on the plate rack 2, a composite hose 31 is installed on the air supply component 6, the composite hose 31 is installed on the kettle cover 7, and the air supply component 6 is connected to the shrinkable airbag 10 through the composite hose 31; a liquid pipe 32 is installed on the liquid storage tank 4, and the liquid pipe 32 passes through the shrinkable airbag 10 and the partition 9 Connection; an air nozzle 11 is installed on the partition 9, an air intake sleeve 12 is installed on the partition 9, the air nozzle 11 is connected to the air intake sleeve 12, a guide rod 13 is installed on the kettle cover 7, the guide rod 13 and the air intake sleeve 12 are slidably matched, and an air inlet 16 is installed on the air intake sleeve 12; the guide rod 13 and the air intake sleeve 12 are located inside the shrinkable airbag 10, a resettable block sleeve 15 is slidably installed inside the air intake sleeve 12, a telescopic ball head 19 is installed on the block sleeve 15, a ball groove 14 is provided on the guide rod 13, and the guide rod 13 and the block sleeve 15 are connected by the telescopic ball head 19 and the ball groove 14. As the block sleeve 15 moves downward, the block sleeve 15 blocks the air inlet 16, and the diameter of the air inlet 16 is reduced.

[0028] Specifically, a longitudinal sliding groove 17 is provided on the air inlet sleeve 12 , and a retaining sleeve 15 is slidably installed in the longitudinal sliding groove 17 . The retaining sleeve 15 is connected to the inner wall of the longitudinal sliding groove 17 via a strip spring 18 .

[0029] Specifically, the kettle cover 7 is connected to the partition 9 via a return spring 33 , and the kettle cover 7 is connected to the kettle body 8 via a sealing gasket.

[0030] It should be noted that, see Figure 3 and Figure 4 The air nozzles 11 are provided in two groups, and the two groups of air nozzles 11 are respectively provided on both sides of the partition 9. The air inlet sleeves 12 corresponding to the two groups of air nozzles 11 are provided with the same specifications. The guide rods 13 corresponding to the two groups of air nozzles 11 are the same in length, but the opening positions of the ball grooves 14 on the guide rods 13 are different. The ball grooves 14 on the two groups of guide rods 13 are opened alternately, for example Figure 5 The air nozzle 11 adopts a pressure-type radioactive scattering nozzle.

[0031] It should be noted that the area with higher hydrogen content in molten aluminum is generally the liquid surface of the molten aluminum. If the liquid surface is not completely removed, pores are likely to form on the liquid surface during solidification.

[0032] When in use, the feed roller 3 transports the kettle body 8 to the bottom of the plate frame 2, and then the cylinder 5 drives the kettle cover 7 to press the kettle body 8, and the kettle cover 7 and the kettle body 8 are sealed by the sealing gasket on the kettle cover 7.

[0033] The aluminum liquid inside the liquid storage tank 4 is transported to the bottom of the kettle body 8 through the liquid pipe 32. At the same time, the mixed gas inside the gas supply assembly 6 is passed into the shrinkable airbag 10 through the composite hose 31. When the shrinkable airbag 10 is filled with the mixed gas, the mixed gas enters the air inlet sleeve 12 through the air inlet 16, and then the mixed gas is filled into the kettle body 8 through the gas nozzle 11, so that the mixed gas reacts with the hydrogen in the aluminum liquid, thereby removing the hydrogen in the aluminum liquid.

[0034] In the initial state, the air inlets 16 corresponding to the two sets of gas nozzles 11 are opened to the maximum. At this time, the mixed gas is quickly filled into the kettle body 8 through the gas nozzles 11 on both sides of the partition 9, so that the mixed gas fills the bottom of the kettle body 8 and hydrogen is quickly reduced. As the amount of molten aluminum injected increases, the gas nozzle 11 is immersed in the molten aluminum. At the same time, the molten aluminum begins to push the partition 9 upward, and the shrinkable airbag 10 is compressed. During this process, the partition 9 drives the air inlet sleeve 12 and the stop sleeve 15 to move synchronously, and the return spring 33 is compressed. At this time, the valve of the air supply component 6 is closed, and the supply of mixed gas into the shrinkable airbag 10 is stopped.

[0035] As the intake sleeve 12 moves upward, the telescopic ball head 19 on the stopper sleeve 15 engages with the ball groove 14 on the guide rod 13, temporarily connecting the guide rod 13 and the stopper sleeve 15. As the intake sleeve 12 continues to move upward, the stopper sleeve 15 slides along the longitudinal groove 17, and the strip spring 18 is compressed. At this time, the stopper sleeve 15 blocks the air inlet 16, reducing the amount of mixed gas entering the intake sleeve 12 and the corresponding amount of gas discharged from the air nozzle 11. When the strip spring 18 is compressed to its limit, the telescopic ball head 19 disengages the ball groove 14, and the stopper sleeve 15 returns to its original position under the action of the strip spring 18, increasing the amount of mixed gas entering the intake sleeve 12. As the intake sleeve 12 continues to move, the telescopic ball head 19 on the stopper sleeve 15 engages with the next set of ball grooves 14, and the above operation is repeated. Since the ball grooves 14 on the two groups of guide rods 13 are opened alternately, when the gas output of one group of gas nozzles 11 decreases, the gas output of the other group of gas nozzles 11 increases. The airflow difference formed by the gas nozzles 11 on both sides guides the mixed gas to flow to one side of the top layer of the molten aluminum. As the air inlet sleeve 12 continues to move upward, the gas output of the two groups of gas nozzles 11 changes alternately. The airflow difference guides the mixed gas to flow to the other side of the top layer of the molten aluminum, thereby effectively removing hydrogen near the liquid surface of the molten aluminum and avoiding local hydrogen residue on the liquid surface.

[0036] It should be noted that, see Figure 4 The length of the air inlet 16 is greater than the baffle 15, and the baffle 15 does not completely block the air inlet 16, thereby preventing the air nozzle 11 from stopping exhaust and reducing the efficiency of removing the molten aluminum near the air nozzle 11. The present invention improves the utilization rate of the mixed gas by reducing the output volume of one group of air nozzles 11 and increasing the output volume of the other group of air nozzles 11, thereby improving the utilization rate of the mixed gas and reducing the waste of the mixed gas.

[0037] See also Figure 2-Figure 3 An electromagnetic suction cup 29 is installed on the partition 9, and a metal plate 30 is installed at the bottom of the kettle cover 7. The electromagnetic suction cup 29 attracts the metal plate 30.

[0038] Because the nozzle 11 needs to be immersed in molten aluminum during use, residual molten aluminum can easily remain in the pores of the nozzle 11, which can easily clog the nozzle 11 after the molten aluminum solidifies. To address this issue, when a specified amount of molten aluminum is injected into the kettle 8, the electromagnetic chuck 29 is energized, attracting and connecting the metal plate 30, freeing the partition 9 and the nozzle 11 from the molten aluminum. As the electromagnetic chuck 29 attracts the metal plate 30, the collapsible airbag 10 is further compressed, and the mixed gas inside the collapsible airbag 10 is discharged through the nozzle 11, thereby expelling any residual molten aluminum from the pores of the nozzle 11.

[0039] Since the chlorine in the mixed gas reacts with the hydrogen in the aluminum liquid to generate hydrogen chloride gas, the gas cannot be discharged directly into the atmosphere. The exhaust pipe 21 needs to be connected to a gas treatment device to treat the hydrogen chloride gas before discharge.

[0040] See also Figure 3-Figure 9 An exhaust pipe 21 is installed on the kettle cover 7, and a vent pipe 20 is installed on the partition 9. The exhaust pipe 21 slides with the vent pipe 20. An air hole plate 34 is installed on the partition 9, and the air hole plate 34 is connected to the vent pipe 20.

[0041] Specifically, a vent hole 23 is provided on the exhaust pipe 21, a threaded groove rod 22 is fixedly installed in the vent pipe 20, a rotating plate 24 is rotatably installed on the exhaust pipe 21, an exhaust hole 25 is provided on the rotating plate 24, a telescopic ball head 26 is installed on the rotating plate 24, the telescopic ball head 26 is slidably matched with the thread groove on the threaded groove rod 22, the rotating plate 24 is connected to the inner wall of the exhaust pipe 21 through an arc spring 28, and a ball block 27 is installed on the threaded groove on the threaded groove rod 22.

[0042] It should be noted that since the chlorine in the mixed gas reacts with the hydrogen in the aluminum liquid to produce hydrogen chloride gas, the product hydrogen chloride gas needs to be discharged from the kettle body 8 in a timely manner to prevent the hydrogen chloride gas from mixing with the aluminum liquid again. The existing technology uses a ventilation system to extract the hydrogen chloride in the kettle body 8 in a timely manner. However, the ventilation system will not only extract the hydrogen chloride gas, but also extract the chlorine in the mixed gas in the kettle body 8, resulting in a reduced utilization rate of the mixed gas.

[0043] It should be noted that the air perforated plate 34 is primarily used to discharge the product hydrogen chloride gas from the kettle 8. The air perforated plate 34 can prevent the molten aluminum from entering the vent pipe 20. Because the molecular weight of hydrogen chloride gas is smaller than that of chlorine, when hydrogen chloride gas and chlorine gas coexist in the kettle 8, the hydrogen chloride gas is located on top of the chlorine gas.

[0044] The hydrogen chloride gas enters the vent pipe 20 through the air hole plate 34 and is discharged from the kettle body 8 through the exhaust pipe 21 .

[0045] It should be noted that, in the initial state, that is, the mixed gas is injected into the kettle body 8, at this time, the telescopic ball head 26 on the rotating plate 24 slides with the threaded groove on the threaded groove rod 22, and the exhaust hole 25 on the rotating plate 24 is staggered with the vent hole 23, so that the exhaust pipe 21 is in a blocked state, thereby preventing the mixed gas from overflowing through the exhaust pipe 21.

[0046] As the amount of molten aluminum injected increases, the molten aluminum pushes the partition 9 upward, and the partition 9 drives the vent pipe 20 and the threaded groove rod 22 to move upward synchronously. Under the cooperation of the threaded groove on the threaded groove rod 22 and the telescopic ball head 26 on the rotating plate 24, the threaded groove rod 22 moves upward and drives the rotating plate 24 to rotate, so that the exhaust hole 25 on the rotating plate 24 coincides with the vent hole 23. At this time, the exhaust pipe 21 is connected to the vent pipe 20. Because the molecular weight of hydrogen chloride gas is smaller than that of chlorine gas, the hydrogen chloride gas inside kettle body 8 is located on top of the chlorine gas. When exhaust pipe 21 is connected to vent pipe 20, the hydrogen chloride gas is discharged from kettle body 8 through vent pipe 20 and exhaust pipe 21. As the threaded rod 22 moves upward, the ball block 27 inside the threaded groove of the threaded rod 22 presses against the second telescopic ball head 26, causing the second telescopic ball head 26 to retract and disengage from the threaded groove of the threaded rod 22. At this time, the rotating plate 24 is reset under the action of the arc spring 28, causing the exhaust hole 25 on the rotating plate 24 to intersect with the vent hole 23 again, blocking the exhaust pipe 21 and preventing the chlorine gas at the bottom of the hydrogen chloride gas from being discharged through the exhaust pipe 21. As the threaded rod 22 moves upward, the telescopic ball head 26 again engages with the threaded groove of the threaded rod 22, and the above operation is repeated.

[0047] See also Figures 1-6 As shown, the present invention is an aluminum alloy casting method, which is applied to the aluminum alloy casting device as described in the above embodiment, and the method includes the following steps: Step S1: The feeding roller 3 conveys the kettle body 8 to the bottom of the plate frame 2, and then the cylinder 5 drives the kettle cover 7 to press the kettle body 8, and the kettle cover 7 and the kettle body 8 are sealed by the sealing gasket on the kettle cover 7; Step S2: The aluminum liquid in the liquid storage tank 4 is transported to the bottom of the kettle body 8 through the liquid pipe 32, and at the same time, the mixed gas in the gas supply assembly 6 is passed into the shrinkable airbag 10 through the composite hose 31; Step S3: When the interior of the collapsible airbag 10 is filled with the mixed gas, the mixed gas enters the air inlet sleeve 12 through the air inlet 16, and then the mixed gas is filled into the kettle body 8 through the gas nozzle 11, so that the mixed gas reacts with the hydrogen in the aluminum liquid, thereby removing the hydrogen in the aluminum liquid; Step S4: As the amount of molten aluminum injected increases, the air nozzle 11 is immersed in the molten aluminum. At the same time, the molten aluminum begins to push the partition 9 upward, and the collapsible airbag 10 is compressed. During this process, the partition 9 drives the air inlet sleeve 12 and the baffle sleeve 15 to move synchronously. Step S5: As the air inlet sleeve 12 moves upward, the telescopic ball head 19 on the stop sleeve 15 engages with the ball groove 14 on the guide rod 13, and the guide rod 13 and the stop sleeve 15 are temporarily connected; Step S6: As the air intake sleeve 12 continues to move upward, the stopper sleeve 15 slides along the longitudinal slide groove 17, and the strip spring 18 is compressed. At this time, the stopper sleeve 15 blocks the air intake port 16, and the amount of mixed gas entering the air intake sleeve 12 is reduced, and the air output of the corresponding air nozzle 11 is reduced; Step S7: When the strip spring 18 is compressed to its limit, the telescopic ball head 19 disengages the ball groove 14, and the retaining sleeve 15 returns to its original position under the action of the strip spring 18. At this point, the amount of mixed gas entering the intake sleeve 12 increases. As the intake sleeve 12 continues to move, the telescopic ball head 19 on the retaining sleeve 15 engages with the next set of ball grooves 14, and the above operation is repeated. Step S8: Since the ball grooves 14 on the two sets of guide rods 13 are alternately provided, when the gas output of one set of gas nozzles 11 decreases, the gas output of the other set of gas nozzles 11 increases. The airflow difference formed by the gas nozzles 11 on both sides guides the mixed gas to flow toward one side of the top layer of the molten aluminum. As the air inlet sleeve 12 continues to move upward, the gas output of the two sets of gas nozzles 11 changes alternately, and the airflow difference guides the mixed gas to flow toward the other side of the top layer of the molten aluminum.

[0048] The implementation principle of the present invention is: During use, the feed roller 3 conveys the kettle body 8 to the bottom of the plate frame 2. The cylinder 5 then drives the kettle cover 7, causing it to press against the kettle body 8. The sealing gasket on the kettle cover 7 achieves a seal between the kettle cover 7 and the kettle body 8. The aluminum liquid in the liquid storage tank 4 is conveyed to the bottom of the kettle body 8 through the liquid pipe 32. At the same time, the mixed gas in the gas supply assembly 6 is passed into the collapsible airbag 10 through the composite hose 31. When the collapsible airbag 10 is filled with the mixed gas, the mixed gas enters the air inlet sleeve 12 through the air inlet 16. The mixed gas is then filled into the kettle body 8 through the gas nozzle 11, causing the mixed gas to react with the hydrogen in the aluminum liquid, thereby removing the hydrogen from the aluminum liquid.

[0049] In the initial state, the air inlets 16 corresponding to the two sets of air nozzles 11 are at their maximum opening. At this time, the mixed gas is rapidly filled into the kettle body 8 through the air nozzles 11 on both sides of the partition 9, so that the mixed gas fills the bottom of the kettle body 8 and hydrogen is rapidly reduced. As the amount of molten aluminum injected increases, the air nozzles 11 are immersed in the molten aluminum, and the molten aluminum begins to push the partition 9 upward, compressing the collapsible airbag 10. During this process, the partition 9 drives the air inlet sleeve 12 and the baffle sleeve 15 to move synchronously, and the return spring 33 is compressed. At this time, the valve of the air supply assembly 6 is closed, and the supply of mixed gas into the collapsible airbag 10 stops.

[0050] As the intake sleeve 12 moves upward, the telescopic ball head 19 on the stopper sleeve 15 engages with the ball groove 14 on the guide rod 13, temporarily connecting the guide rod 13 and the stopper sleeve 15. As the intake sleeve 12 continues to move upward, the stopper sleeve 15 slides along the longitudinal groove 17, and the strip spring 18 is compressed. At this time, the stopper sleeve 15 blocks the air inlet 16, reducing the amount of mixed gas entering the intake sleeve 12 and the corresponding amount of gas discharged from the air nozzle 11. When the strip spring 18 is compressed to its limit, the telescopic ball head 19 disengages the ball groove 14, and the stopper sleeve 15 returns to its original position under the action of the strip spring 18, increasing the amount of mixed gas entering the intake sleeve 12. As the intake sleeve 12 continues to move, the telescopic ball head 19 on the stopper sleeve 15 engages with the next set of ball grooves 14, and the above operation is repeated. Since the ball grooves 14 on the two groups of guide rods 13 are opened alternately, when the gas output of one group of gas nozzles 11 decreases, the gas output of the other group of gas nozzles 11 increases. The airflow difference formed by the gas nozzles 11 on both sides guides the mixed gas to flow to one side of the top layer of the molten aluminum. As the air inlet sleeve 12 continues to move upward, the gas output of the two groups of gas nozzles 11 changes alternately. The airflow difference guides the mixed gas to flow to the other side of the top layer of the molten aluminum, thereby effectively removing hydrogen near the liquid surface of the molten aluminum and avoiding local hydrogen residue on the liquid surface.

[0051] Specifically, in the initial state, that is, the mixed gas is injected into the kettle body 8, at this time, the telescopic ball head 26 on the rotating plate 24 slides with the threaded groove on the threaded groove rod 22, and the exhaust hole 25 on the rotating plate 24 is staggered with the vent hole 23, so that the exhaust pipe 21 is in a blocked state, thereby preventing the mixed gas from overflowing through the exhaust pipe 21.

[0052] As the amount of molten aluminum injected increases, the molten aluminum pushes the partition 9 upward, and the partition 9 drives the vent pipe 20 and the threaded groove rod 22 to move upward synchronously. Under the cooperation of the threaded groove on the threaded groove rod 22 and the telescopic ball head 26 on the rotating plate 24, the threaded groove rod 22 moves upward and drives the rotating plate 24 to rotate, so that the exhaust hole 25 on the rotating plate 24 coincides with the vent hole 23. At this time, the exhaust pipe 21 is connected to the vent pipe 20. Because the molecular weight of hydrogen chloride gas is smaller than that of chlorine gas, the hydrogen chloride gas inside kettle body 8 is located on top of the chlorine gas. When exhaust pipe 21 is connected to vent pipe 20, the hydrogen chloride gas is discharged from kettle body 8 through vent pipe 20 and exhaust pipe 21. As the threaded rod 22 moves upward, the ball block 27 inside the threaded groove of the threaded rod 22 presses against the second telescopic ball head 26, causing the second telescopic ball head 26 to retract and disengage from the threaded groove of the threaded rod 22. At this time, the rotating plate 24 is reset under the action of the arc spring 28, causing the exhaust hole 25 on the rotating plate 24 to intersect with the vent hole 23 again, blocking the exhaust pipe 21 and preventing the chlorine gas at the bottom of the hydrogen chloride gas from being discharged through the exhaust pipe 21. As the threaded rod 22 moves upward, the telescopic ball head 26 again engages with the threaded groove of the threaded rod 22, and the above operation is repeated.

[0053] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. An aluminum alloy casting device, characterized in that: The invention comprises a base (1), feeding rollers (3) are installed on both sides of the base (1), a plate rack (2) is installed on the base (1), a cylinder (5) is installed on the plate rack (2), an output end of the cylinder (5) is connected to a kettle cover (7), the feeding rollers (3) transport the kettle body (8) to the bottom of the plate rack (2), the kettle cover (7) is cooperatively connected to the kettle body (8), the kettle cover (7) is connected to the partition (9) through a shrinkable air bag (10), and the partition (9) extends into the kettle body (8); A liquid storage tank (4) and an air supply assembly (6) are installed on the plate frame (2), a composite hose (31) is installed on the air supply assembly (6), the composite hose (31) is installed on the kettle cover (7), and the air supply assembly (6) is connected to the shrinkable air bag (10) through the composite hose (31); a liquid pipe (32) is installed on the liquid storage tank (4), the liquid pipe (32) passes through the shrinkable air bag (10) and is connected to the partition (9); an air nozzle (11) is installed on the partition (9), an air intake sleeve (12) is installed on the partition (9), the air nozzle (11) is connected to the air intake sleeve (12), a guide rod (13) is installed on the kettle cover (7), the guide rod (13) is slidably matched with the air intake sleeve (12), and an air inlet (16) is installed on the air intake sleeve (12); The guide rod (13) and the air inlet sleeve (12) are located inside the collapsible airbag (10), and a resettable stop sleeve (15) is slidably installed inside the air inlet sleeve (12). A telescopic ball head (19) is installed on the stop sleeve (15), and a ball groove (14) is provided on the guide rod (13). The guide rod (13) and the stop sleeve (15) are connected by the telescopic ball head (19) and the ball groove (14). As the stop sleeve (15) moves downward, the stop sleeve (15) blocks the air inlet (16), and the diameter of the air inlet (16) is reduced. The air nozzles (11) are provided in two groups. The two groups of air nozzles (11) are respectively provided on both sides of the partition (9). The air inlet sleeves (12) corresponding to the two groups of air nozzles (11) are provided with the same specifications. The guide rods (13) corresponding to the two groups of air nozzles (11) are the same in length, but the opening positions of the ball grooves (14) on the guide rods (13) are different. The ball grooves (14) on the two groups of guide rods (13) are opened alternately.

2. The aluminum alloy casting device according to claim 1, characterized in that: An electromagnetic suction cup (29) is installed on the partition (9), a metal plate (30) is installed on the bottom of the kettle cover (7), and the electromagnetic suction cup (29) attracts the metal plate (30).

3. The aluminum alloy casting device according to claim 1, characterized in that: A longitudinal slide groove (17) is provided on the air inlet sleeve (12), a retaining sleeve (15) is slidably installed in the longitudinal slide groove (17), and the retaining sleeve (15) is connected to the inner wall of the longitudinal slide groove (17) via a strip spring (18).

4. The aluminum alloy casting device according to claim 1, characterized in that: The kettle cover (7) is connected to the partition (9) via a return spring (33), and the kettle cover (7) is connected to the kettle body (8) via a sealing gasket.

5. The aluminum alloy casting device according to claim 1, characterized in that: An exhaust pipe (21) is installed on the kettle cover (7), a vent pipe (20) is installed on the partition (9), the exhaust pipe (21) and the vent pipe (20) are slidably matched, and an air hole plate (34) is installed on the partition (9), and the air hole plate (34) is connected to the vent pipe (20).

6. The aluminum alloy casting device according to claim 5, characterized in that: The exhaust pipe (21) is provided with an air vent (23), a threaded groove rod (22) is fixedly installed in the exhaust pipe (20), a rotating plate (24) is rotatably installed on the exhaust pipe (21), an exhaust hole (25) is provided on the rotating plate (24), a second telescopic ball head (26) is installed on the rotating plate (24), the second telescopic ball head (26) is slidably matched with the threaded groove on the threaded groove rod (22), the rotating plate (24) is connected to the inner wall of the exhaust pipe (21) through an arc spring (28), and a ball block (27) is installed on the threaded groove on the threaded groove rod (22).

7. A method for casting an aluminum alloy, characterized in that: The method is applied to the aluminum alloy casting device according to any one of claims 1 to 6, and the method comprises the following steps: Step S1: The feeding roller (3) conveys the kettle body (8) to the bottom of the plate frame (2), and then the cylinder (5) drives the kettle cover (7) so that the kettle cover (7) presses the kettle body (8), and the kettle cover (7) and the kettle body (8) are sealed by the sealing gasket on the kettle cover (7); Step S2: The aluminum liquid in the liquid storage tank (4) is transported to the bottom of the kettle body (8) through the liquid pipe (32), and at the same time, the mixed gas in the gas supply component (6) is passed into the interior of the shrinkable airbag (10) through the composite hose (31); Step S3: When the interior of the collapsible airbag (10) is filled with the mixed gas, the mixed gas enters the air inlet sleeve (12) through the air inlet (16), and then the mixed gas is filled into the kettle body (8) through the air nozzle (11), so that the mixed gas reacts with the hydrogen in the aluminum liquid, thereby removing the hydrogen in the aluminum liquid; Step S4: As the amount of aluminum liquid injected increases, the air nozzle (11) is immersed in the aluminum liquid, and at the same time, the aluminum liquid begins to push the partition (9) upward, and the shrinkable airbag (10) is compressed. During this process, the partition (9) drives the air inlet sleeve (12) and the stop sleeve (15) to move synchronously; Step S5: As the air inlet sleeve (12) moves upward, the telescopic ball head (19) on the stop sleeve (15) engages with the ball groove (14) on the guide rod (13), and the guide rod (13) and the stop sleeve (15) are temporarily connected; Step S6: As the air intake sleeve (12) continues to move upward, the retaining sleeve (15) slides along the longitudinal slide groove (17), and the strip spring (18) is compressed. At this time, the retaining sleeve (15) blocks the air intake port (16), and the amount of mixed gas entering the air intake sleeve (12) decreases, and the corresponding air outlet volume of the air nozzle (11) decreases; Step S7: When the strip spring (18) is compressed to its limit, the telescopic ball head (19) is separated from the ball groove (14), and the retaining sleeve (15) is reset under the action of the strip spring (18). At this time, the amount of mixed gas entering the intake sleeve (12) increases. As the intake sleeve (12) continues to move, the telescopic ball head (19) on the retaining sleeve (15) cooperates with the next set of ball grooves (14), and the above operation is repeated; Step S8: Since the ball grooves (14) on the two groups of guide rods (13) are opened alternately, when the gas output of one group of gas nozzles (11) decreases, the gas output of the other group of gas nozzles (11) increases, and the air flow difference formed by the gas nozzles (11) on both sides guides the mixed gas to flow toward one side of the top layer of the aluminum liquid; as the air inlet sleeve (12) continues to move upward, the gas output of the two groups of gas nozzles (11) changes alternately, and the air flow difference guides the mixed gas to flow toward the other side of the top layer of the aluminum liquid.

Images