Melt casting apparatus for high-strength heat-resistant aluminum alloy

Abstract

The application relates to the field of part casting, in particular to a melting and casting device for high-strength heat-resistant aluminum alloy, which comprises a crucible body, a melting cavity for realizing the melting of metal is formed in the top of the crucible body downwards, a ring groove is formed in the inner periphery of the vertical side wall of the crucible body, the ring groove extends to the top of the crucible body, a bottom cavity is formed in the position of the crucible body relative to the bottom of the melting cavity, a plurality of circulation holes for connecting the bottom cavity and the ring groove are formed in the inner periphery of the crucible body, a flow driving assembly for driving the liquid metal to flow into the circulation hole and realizing the sealing of the connection position of the circulation hole and the bottom cavity is further arranged in the crucible body, and the top surface of the crucible body is lower on the side facing the melting cavity relative to the ring groove than on the side facing away from the melting cavity relative to the ring groove. The application has the advantages of improving the impurity removal effect.

Description

Technical Field

[0001] This application relates to the field of parts casting, and in particular to a melting and casting apparatus for a high-strength heat-resistant aluminum alloy. Background Technology

[0002] An intercooler is a component of a turbocharger in a car. Its function is to reduce the temperature of the high-temperature air after turbocharging, thereby reducing the engine's thermal load, increasing the intake air volume, and thus increasing the engine's power. It is usually made through a casting process.

[0003] When metal melts, impurities float to the surface of the liquid metal, and workers remove them using a strainer. Because impurity removal may not be complete, a small amount of impurities may remain on the surface of the metal, requiring grinding to remove the surface impurities before further processing of the casting.

[0004] To improve resource utilization, the metal shavings produced during grinding are not discarded but collected and reused. However, some metal shavings are inevitably wasted during the collection process, which is a significant shortcoming. Summary of the Invention

[0005] To address the problem of incomplete impurity removal leading to waste of impurity-containing metals, this application provides a melting and casting apparatus for high-strength heat-resistant aluminum alloys.

[0006] The high-strength heat-resistant aluminum alloy melting and casting device provided in this application adopts the following technical solution:

[0007] A high-strength heat-resistant aluminum alloy melting and casting apparatus includes a crucible body. The top of the crucible body has a downward-facing melting chamber for melting the metal. The vertical sidewall of the crucible body has an annular groove extending to the top of the crucible body. The crucible body has a bottom cavity relative to the bottom of the melting chamber. The crucible body has multiple circulation holes extending circumferentially to connect the bottom cavity and the annular groove. The crucible body also has a flow-driving component for driving liquid metal into the circulation holes and sealing the connection between the circulation holes and the bottom cavity. The top surface of the crucible body is lower on the side facing the melting chamber relative to the annular groove than on the side facing away from the melting chamber relative to the annular groove.

[0008] By adopting the above technical solution, the metal is placed in the melting chamber and heated to melt into a liquid state. During this process, impurities float on the surface of the liquid metal. Then, the flow-driving component drives the liquid metal through the circulation hole into the annular groove, and then flows back into the melting chamber from the top of the crucible body. As the liquid metal in the annular groove flows back into the melting chamber from the top of the crucible body, the liquid metal flows from the periphery to the center of the melting chamber. This can bring the impurities floating on the surface to the center of the melting chamber, which not only facilitates the removal of impurities by workers, but also improves the completeness of impurity removal. After the liquid metal cools and solidifies, it can be directly processed in the next step without the need to remove impurities beforehand, thereby reducing the possibility of waste of impurities and thus saving resources.

[0009] Optionally, the flow-driving assembly includes a drive motor disposed at the bottom of the crucible body and electrically connected to the control system. The output shaft of the drive motor is coaxially provided with a transmission rod that rotates and passes into the bottom cavity. The transmission rod is circumferentially provided with multiple sealing blades, and there is a gap between two adjacent sealing blades. The sealing blades are in close contact with the circumferential sidewall of the bottom cavity, and the multiple sealing blades and multiple circulation holes correspond one-to-one.

[0010] By adopting the above technical solution, the control system starts the drive motor, and the output shaft of the drive motor drives the sealing blade to rotate through the transmission rod. The rotation of the sealing blade can block the connection between the circulation hole and the bottom cavity, and the sealing blade can drive the liquid metal to rotate. In this way, the liquid metal flows into the circulation hole under the action of centrifugal force, thus providing power for the circulation flow of liquid metal between the melting cavity, the bottom cavity, the circulation hole, and the annular groove.

[0011] Optionally, the top of the crucible body is provided with an annular upper chamber cover, and the bottom of the upper chamber cover is provided with a gas preparation groove connected to the annular groove. There is a gap between the bottom surface of the upper chamber cover facing the melting chamber relative to the gas preparation groove and the top surface of the crucible body. The bottom surface of the upper chamber cover facing away from the melting chamber relative to the gas preparation groove is connected to the top surface of the crucible body. The upper chamber cover is also provided with a height adjustment component for adjusting the height of the molten metal flowing out between the upper chamber cover and the top surface of the crucible body.

[0012] By adopting the above technical solution, the height of the component can be adjusted to allow different amounts of liquid metal to flow back into the melting chamber, ensuring that the circulating flow of liquid metal can affect impurities floating on its surface, so that the impurities can gather towards the center of the melting chamber.

[0013] Optionally, the height adjustment assembly includes a lifting ring that is in close contact with the side wall of the melting chamber. The lifting ring is provided with an adjusting screw that slides vertically through the upper chamber cover. The adjusting screw is threaded with a fastening nut for pressing against the top of the upper chamber cover.

[0014] By adopting the above technical solution, workers can manually rotate the fastening nut to tighten the nut and adjust the screw, thereby adjusting the height of the lifting ring and achieving the flow height of the liquid metal when it flows back from the ring groove to the melting chamber.

[0015] Optionally, when the lifting ring rises to its highest position, the lifting ring and the bottom surface of the upper cavity cover are in close contact with the side of the air preparation groove facing the melting chamber. The upper cavity cover is also provided with an air compression component for pressing the air in the air preparation groove into the ring groove.

[0016] By adopting the above technical solution, the lifting ring rises to the highest point, sealing the flow channel between the upper chamber cover and the top of the crucible body for the flow of liquid metal. Then, the air compression assembly pressurizes the air in the gas preparation tank into the ring groove, and the liquid metal in the ring groove is pressed back into the melting chamber through the circulation pipe, thereby improving the completeness of the liquid metal being poured out of the crucible body and reducing the possibility of liquid metal remaining in the crucible body.

[0017] Optionally, the air compression assembly includes an air compression plate that slides vertically within the air preparation tank. The air compression plate is in close contact with the vertical sidewall of the air preparation tank. The top of the upper cavity cover also has a vent hole for connecting the air preparation tank with the outside. The air compression plate is provided with a pressure rod that slides out of the upper cavity cover.

[0018] By adopting the above technical solution, during the metal melting process, the air compressor plate is kept suspended in mid-air by the friction between it and the side wall of the air preparation tank. Before the molten metal is poured out, the worker uses a pressure rod to overcome the friction and push the air compressor plate downwards, thereby pushing the air in the air preparation tank into the annular groove.

[0019] Optionally, multiple push rods are slidably inserted through the outer wall of the crucible body. The push rods are used to slide into the circulation hole and are sized to match it. A top support plate is provided at one end of the push rod outside the crucible body. A compression spring supports the top support plate and the outer wall of the crucible body. A cylinder electrically connected to the control system is provided on the outer wall of the crucible body, and a linkage ring is slidably sleeved thereon. A reversing wheel is also provided on the outer wall of the crucible body. A pull wire is attached to the top support plate. The pull wire passes around the reversing wheel and is tied to the linkage ring. When the piston rod of the cylinder is fully extended, the end of the push rod inside the crucible body is exactly located at the connection between the bottom cavity and the circulation hole.

[0020] By adopting the above technical solution, during the air compression process, air enters the circulation hole from the annular groove, thereby pushing the liquid metal in the circulation hole back into the melting chamber. During this process, the piston rod of the cylinder extends, and the pull line pulls the push rod through the top support plate to flow into the circulation hole until the push rod completely fills the circulation hole. This reduces the possibility of the liquid metal in the melting chamber flowing back into the circulation hole, which helps to improve the completeness of the liquid metal being poured out.

[0021] Optionally, the upper cavity cover and the lifting ring have drainage ports on their side walls relative to the vertical center line of the molten cavity for the outflow of liquid metal.

[0022] By adopting the above technical solution, the drain port can assist in pouring liquid metal out of the molten chamber.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Under the action of the flow-driving component, the liquid metal circulates between the melting chamber, bottom chamber, circulation hole, and annular groove. This can carry impurities floating on the surface of the liquid metal to the center of the melting chamber. On the one hand, it is convenient for workers to remove impurities, and on the other hand, it can improve the completeness of impurity removal. After the liquid metal cools and solidifies, it can be directly processed in the next step without the need to remove impurities in advance. This helps to reduce the possibility of impurities being wasted, thereby saving resources.

[0025] 2. The height adjustment component adjusts the height of different amounts of liquid metal flowing back into the melting chamber to ensure that the circulation of liquid metal can affect impurities floating on its surface, so that the impurities can gather towards the center of the melting chamber;

[0026] 3. The air compression assembly forces the air in the air preparation tank into the annular groove. The liquid metal in the annular groove is then forced back into the melting chamber through the circulation pipe, thereby improving the completeness of the liquid metal being poured out of the crucible body and reducing the possibility of liquid metal remaining in the crucible body. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0028] Figure 2 This is a cross-sectional view showing the positional relationship between the crucible body, the pressure plate, and the liquid pusher in an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the drive motor, transmission rod, and sealing blade in the embodiments of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Crucible body; 101. Melting chamber; 102. Annular groove; 103. Bottom chamber; 104. Circulation hole; 21. Drive motor; 22. Transmission rod; 23. Sealing blade; 3. Upper chamber cover; 31. Gas preparation groove; 32. Vent hole; 41. Lifting ring; 42. Adjusting screw; 43. Fastening nut; 51. Gas pressure plate; 52. Pressure rod; 6. Pushing rod; 7. Top support plate; 8. Compression spring; 9. Linkage ring; 10. Reversing wheel; 11. Pull line; 12. Drain port. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0032] This application discloses a melting and casting apparatus for high-strength heat-resistant aluminum alloys.

[0033] Reference Figure 1 and Figure 2 The high-strength heat-resistant aluminum alloy melting and casting device includes a crucible body 1, and a melting chamber 101 is provided at the center of the top of the crucible body 1. The melting chamber 101 is used to melt and mix metals of different materials.

[0034] Reference Figure 1 and Figure 2 A ring groove 102 is provided in the inner circumference of the vertical side wall of the crucible body 1. The ring groove 102 extends to the top surface of the crucible body 1. The side of the top surface of the crucible body 1 facing the melting cavity 101 relative to the ring groove 102 is lower than the side of the ring groove 102 facing away from the melting cavity 101.

[0035] Reference Figure 1 and Figure 2 A bottom cavity 103 is provided in the crucible body 1 at the position of the bottom of the melting cavity 101. The bottom cavity 103 has a circular cross-section and communicates with the melting cavity 101. A plurality of circulation holes 104 are provided in the inner circumference of the crucible body 1 to connect the bottom cavity 103 with the annular groove 102. The connection between the circulation hole 104 and the annular groove 102 is located at the lowest position of the annular groove 102.

[0036] Reference Figure 2 and Figure 3 The crucible body 1 is also provided with a flow-driving component that drives the liquid metal into the circulation hole 104 and seals the connection between the circulation hole 104 and the bottom cavity 103. The flow-driving component includes a drive motor 21, a transmission rod 22 and multiple sealing blades 23.

[0037] The drive motor 21 is electrically connected to the control system and bolted to the bottom of the crucible body 1. The transmission rod 22 is coaxially arranged on the output shaft of the drive motor 21 and rotates into the bottom cavity 103. Multiple sealing blades 23 are circumferentially welded to the rod body of the transmission rod 22 located in the bottom cavity 103.

[0038] There is a gap between two adjacent sealing blades 23. The sealing blades 23 are fan-shaped. One sealing blade 23 corresponds to one circulation hole 104. The arc-shaped sidewall of the sealing blade 23 is in close contact with the sidewall of the bottom cavity 103.

[0039] Reference Figure 1 , Figure 2 and Figure 3 After the worker puts the metal into the melting chamber 101, it is heated. The metal gradually melts into a liquid state. During this process, the sealing blade 23 seals the circulation hole 104, and impurities float on the surface of the liquid metal.

[0040] After the metal is fully melted, the control system starts the drive motor 21. The output shaft of the drive motor 21 drives multiple sealing blades 23 to rotate through the transmission rod 22. During this process, the liquid metal in the melting chamber 101 will first flow into the annular groove 102 spontaneously through the circulation hole 104.

[0041] Until the liquid level of the annular groove 102 is equal to that of the liquid metal in the molten chamber 101, the rotation of the sealing blade 23 will apply a certain centrifugal force to the liquid metal in the bottom cavity 103. Under the action of centrifugal force, the liquid metal in the bottom cavity 103 will further flow into the annular groove 102 through the circulation hole 104.

[0042] The above process will cause the liquid metal in the annular groove 102 to be higher than the liquid metal in the melting chamber 101. Therefore, the liquid metal in the annular groove 102 will pass over the lower position of the top surface of the crucible body 1, causing it to flow back into the melting chamber 101.

[0043] Reference Figure 2 and Figure 3 When the liquid metal in the annular groove 102 flows back from the top surface of the crucible body 1 to the melting chamber 101, its flow will gather the impurities floating on the surface towards the center of the melting chamber 101, thereby improving the completeness of the workers' manual removal of impurities.

[0044] At the same time, the rotation of the sealing blade 23 will cause the liquid metal in the molten chamber 101 to flow circumferentially. The surface of the liquid metal in the molten chamber 101 will be inverted cone shape, and the impurities themselves will also converge towards the center of the molten chamber 101, making it easier for workers to remove them completely.

[0045] Based on the aforementioned effects, the surface of the solidified liquid metal will not have a layer of impurities. Therefore, workers can directly perform further processing on the metal without removing the impurities from the metal surface beforehand, which helps to reduce the possibility of metal waste.

[0046] On the other hand, the repeated melting of impurity metals will inevitably consume a lot of energy, and the technical solution of this application can directly save energy in this part, thus achieving energy saving.

[0047] Reference Figure 1 and Figure 2 The top of the crucible body 1 is provided with an annular upper cavity cover 3. The bottom of the upper cavity cover 3 is provided with a gas preparation groove 31 connected to the annular groove 102. There is a gap between the bottom surface of the upper cavity cover 3 facing the melting chamber 101 and the top surface of the crucible body 1. The bottom surface of the upper cavity cover 3 facing away from the melting chamber 101 and the side opposite to the gas preparation groove 31 is bolted to the top surface of the crucible body 1.

[0048] Reference Figure 1 and Figure 2 Since the amount of molten metal in the crucible body 1 may vary each time, the liquid metal level will also vary. Therefore, an adjustment component is also arranged on the upper chamber cover 3. The adjustment component is used to adjust the flow height of the molten metal when it flows back from the annular groove 102 into the melting chamber 101.

[0049] The height adjustment assembly includes a lifting ring 41 that is in close contact with and slidably fitted to each vertical sidewall of the melting chamber 101. An adjusting screw 42 that slides vertically through the upper chamber cover 3 is welded to the top of the lifting ring 41. A fastening nut 43 for pressing against the top surface of the upper chamber cover 3 is threaded onto the adjusting screw 42.

[0050] The worker manually rotates the fastening bolt, and the fastening nut 43 cooperates with the adjusting screw 42 to adjust the height of the lifting ring 41, so that the liquid metal flows back from the highest point of the liquid surface to the melting chamber 101 as much as possible. This ensures that the flow of the liquid metal can carry the impurities floating on the surface to the center of the melting chamber 101, thereby improving the worker's completeness in removing impurities.

[0051] Reference Figure 1 and Figure 2 When the lifting ring 41 rises to its highest position, the lifting ring 41 is in close contact with the side of the bottom surface of the upper cavity cover 3 opposite to the melting cavity 101. The upper cavity cover 3 is also provided with a compressing component for pressing the air in the air preparation groove 31 into the ring groove 102.

[0052] Reference Figure 1 and Figure 2 The compressed air assembly includes a compressed air plate 51 that slides vertically in the air preparation tank 31. The compressed air plate 51 is in close contact with the vertical side wall of the air preparation tank 31. The top of the upper cavity cover 3 is also provided with a plurality of vent holes 32 for communicating the air preparation tank 31 with the outside. A pressure rod 52 that slides vertically through the upper cavity cover 3 is welded on the compressed air plate 51.

[0053] Reference Figure 1 and Figure 2 After the impurities are completely removed, the worker first seals the upper chamber cover 3 with the top surface of the crucible body 1 by adjusting the height of the lifting ring 41, and then pushes the pressure plate 51 downward by the pressure rod 52.

[0054] The air pressure plate 51 pressurizes the air in the air preparation tank 31 into the annular groove 102, thereby pressing the liquid metal in the annular groove 102 back into the circulation hole 104 and flowing back into the melting chamber 101. The flow-driving component seals the circulation hole 104 in a timely manner, which helps to improve the completeness of the liquid metal pouring out.

[0055] Reference Figure 1 and Figure 2The bottom of each side of the crucible body 1 relative to the annular groove 102 is inverted conical. Multiple push rods 6 are slidably inserted through the outer wall of the crucible body 1. One circulation hole 104 corresponds to one push rod 6. The push rod 6 is used to slide through the corresponding circulation hole 104 and matches its size.

[0056] A top support plate 7 is welded to one end of the push rod 6 located outside the crucible body 1. A compression spring 8 supports the top support plate 7 between it and the outer wall of the crucible body 1. A reversing wheel 10 is arranged on the outer wall of the crucible body 1 above each push rod 6.

[0057] A cylinder electrically connected to the control system is bolted to the outer wall of the crucible body 1 and a linkage ring 9 is slidably sleeved thereon. Each top support plate 7 is attached with a pull wire 11, which passes around the reversing wheel 10 and is tied to the linkage ring 9. When the piston rod of the cylinder is fully extended, the end of the liquid pusher 6 located inside the crucible body 1 is exactly at the connection between the bottom cavity 103 and the circulation hole 104.

[0058] While the worker manually pressurizes the air in the air preparation tank 31 into the ring tank 102, the worker observes the liquid metal in the melting chamber 101. When bubbles are observed to emerge, the worker starts the cylinder, the piston rod of the cylinder extends, and the linkage ring 9 pulls the push rod 6 through the pull line 11. The push rod 6 inserts into the corresponding circulation hole 104 and completely fills the circulation hole 104, reducing the possibility of liquid metal remaining in the circulation hole 104.

[0059] Reference Figure 1 The upper cavity cover 3 and the lifting ring 41 are fitted with a drain port 12 on the side wall of the molten cavity 101 with respect to the vertical center line. The opening of the drain port 12 facilitates the pouring out of the liquid metal.

[0060] The implementation principle of the high-strength heat-resistant aluminum alloy melting and casting device in this application embodiment is as follows: After the worker puts various metals into the melting chamber 101 and heats them, the metals gradually melt into a liquid state. During this process, the sealing blades 23 seal the circulation holes 104, and impurities float on the surface of the liquid metal. After the metal is fully melted, the control system starts the drive motor 21. The output shaft of the drive motor 21 drives multiple sealing blades 23 to rotate through the transmission rod 22. The rotation of the sealing blades 23 applies a certain centrifugal force to the liquid metal in the bottom chamber 103. Under the action of centrifugal force, the liquid metal in the bottom chamber 103 flows into the annular groove 102 through the circulation holes 104.

[0061] The liquid metal in the annular groove 102 flows over the top surface of the crucible body 1 and the lifting ring 41 and flows back into the melting chamber 101. This flow process will gather the impurities floating on the surface towards the center of the melting chamber 101, which will help improve the completeness of the manual removal of impurities by workers.

[0062] After all impurities have been removed, the worker first seals the upper chamber cover 3 with the top surface of the crucible body 1 by adjusting the height of the lifting ring 41. Then, the worker pushes the pressure plate 51 downward by pressing the pressure rod 52. The pressure plate 51 forces the air in the gas preparation tank 31 into the ring groove 102. The worker observes the liquid metal in the melting chamber 101. When bubbles are observed to emerge, the worker starts the cylinder. The piston rod of the cylinder extends, and the linkage ring 9 pulls the push rod 6 through the pull wire 11. The push rod 6 inserts into the corresponding circulation hole 104 and completely fills the circulation hole 104. After that, the liquid metal in the melting chamber 101 can be completely poured out through the drain port 12.

[0063] 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 melting and casting apparatus for high-strength heat-resistant aluminum alloy, characterized in that: The system includes a crucible body (1), with a melting chamber (101) at the top of the crucible body (1) for melting metal. A ring groove (102) is formed circumferentially on the inner sidewall of the vertical sidewall of the crucible body (1), extending to the top of the crucible body (1). A bottom cavity (103) is formed on the crucible body (1) relative to the bottom of the melting chamber (101). Multiple circulation holes (104) are formed circumferentially inside the crucible body (1) to connect the bottom cavity (103) and the ring groove (102). The crucible body (1) also includes a flow-driving mechanism for driving liquid metal into the circulation holes (104) and sealing the connection between the circulation holes (104) and the bottom cavity (103). The drive assembly includes a drive motor (21) disposed at the bottom of the crucible body (1) and electrically connected to the control system. The output shaft of the drive motor (21) is coaxially provided with a transmission rod (22) that rotates into the bottom cavity (103). The transmission rod (22) is provided with multiple sealing blades (23) circumferentially. There is a gap between two adjacent sealing blades (23). The sealing blades (23) are in close contact with the circumferential sidewall of the bottom cavity (103). The multiple sealing blades (23) and multiple circulation holes (104) correspond one-to-one. The side of the top surface of the crucible body (1) facing the melting cavity (101) relative to the annular groove (102) is lower than the side of the annular groove (102) facing away from the melting cavity (101).

2. The melting and casting apparatus for high-strength heat-resistant aluminum alloy according to claim 1, characterized in that: The crucible body (1) is provided with an annular upper chamber cover (3) at the top. The bottom of the upper chamber cover (3) is provided with a gas preparation groove (31) connected to the annular groove (102). There is a gap between the bottom surface of the upper chamber cover (3) facing the melting chamber (101) relative to the gas preparation groove (31) and the top surface of the crucible body (1). The bottom surface of the upper chamber cover (3) facing away from the melting chamber (101) relative to the gas preparation groove (31) is connected to the top surface of the crucible body (1). The upper chamber cover (3) is also provided with a height adjustment component for adjusting the height of the molten metal flowing out between the upper chamber cover (3) and the top surface of the crucible body (1).

3. The high-strength heat-resistant aluminum alloy melting and casting apparatus according to claim 2, characterized in that: The height adjustment assembly includes a lifting ring (41) that is in close contact with the side wall of the melting chamber (101). The lifting ring (41) is provided with an adjusting screw (42) that slides vertically through the upper chamber cover (3). The adjusting screw (42) is threaded with a fastening nut (43) for pressing against the top of the upper chamber cover (3).

4. The high-strength heat-resistant aluminum alloy melting and casting apparatus according to claim 3, characterized in that: When the lifting ring (41) rises to its highest position, the lifting ring (41) and the bottom surface of the upper cavity cover (3) are in close contact with the side of the air preparation groove (31) facing the melting cavity (101). The upper cavity cover (3) is also provided with an air compression assembly for pressing the air in the air preparation groove (31) into the ring groove (102).

5. The melting and casting apparatus for high-strength heat-resistant aluminum alloy according to claim 4, characterized in that: The compressed air assembly includes a compressed air plate (51) that slides vertically in the air preparation slot (31). The compressed air plate (51) is in close contact with the vertical side wall of the air preparation slot (31). The top of the upper cavity cover (3) is also provided with a vent hole (32) for communicating the air preparation slot (31) with the outside. The compressed air plate (51) is provided with a pressure rod (52) that slides out to the outside of the upper cavity cover (3).

6. The melting and casting apparatus for high-strength heat-resistant aluminum alloy according to claim 5, characterized in that: Multiple push rods (6) are slidably inserted through the outer wall of the crucible body (1). The push rods (6) are used to slide into the circulation hole (104) and are matched with its size. A top support plate (7) is provided at one end of the push rod (6) outside the crucible body (1). A compression spring (8) is provided between the top support plate (7) and the outer wall of the crucible body (1). A cylinder electrically connected to the control system is provided on the outer wall of the crucible body (1) and a linkage ring (9) is slidably sleeved thereon. A reversing wheel (10) is also provided on the outer wall of the crucible body (1). A pull wire (11) is attached to the top support plate (7). The pull wire (11) passes around the reversing wheel (10) and is attached to the linkage ring (9). When the piston rod of the cylinder is fully extended, the end of the push rod (6) inside the crucible body (1) is exactly located at the connection between the bottom cavity (103) and the circulation hole (104).

7. The melting and casting apparatus for high-strength heat-resistant aluminum alloy according to claim 3, characterized in that: The upper cavity cover (3) and the lifting ring (41) are fitted with drain ports (12) on the side walls of the upper cavity cover (3) and the lifting ring (41) relative to the vertical center line of the molten cavity (101) for the outflow of liquid metal.

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