Casting smelting equipment and smelting method

Abstract

The casting smelting equipment comprises a bottom plate, a U-shaped frame is connected to the upper end of the bottom plate, mounting strips are fixedly connected between two vertical parts of the U-shaped frame, a cylindrical shell is fixedly connected between the two mounting strips, a first columnar groove is formed in the lower end of the cylindrical shell, and a second columnar groove is formed in the lower end of the cylindrical shell. And a second columnar groove is formed in the upper end of the cylindrical shell, two hydraulic telescopic rods are symmetrically and fixedly connected to the upper end of the horizontal part of the U-shaped frame, and the telescopic ends of the two hydraulic telescopic rods both extend into the first columnar groove and are jointly and fixedly connected with a supporting piston plate. The invention further discloses a smelting method of the casting smelting equipment. In the actual use process, gas blowing can be conducted through argon, oxygen and other gas influencing smelting in molten metal are taken away, smelting quality is improved, meanwhile, dross can be taken to the surface of the molten metal, the dross is removed during liquid discharging, and the actual quality of the molten metal after smelting is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of casting smelting, and in particular to a casting smelting device and a smelting method. Background Art

[0002] In the field of casting smelting, the quality of molten metal is the core factor that determines the performance and quality of the final casting. From a macro perspective, castings are widely used in many key industries such as aerospace, automobile manufacturing, and mechanical engineering. The quality of castings is directly related to the safety, reliability, and service life of the products. For example, in automobile manufacturing, the performance of castings such as engine cylinders and transmission housings directly affects the vehicle's power, fuel economy, and driving stability. The quality of molten metal, as the initial form before the casting is formed, directly determines the density of the casting's internal structure, the uniformity of its composition, and the presence of defects. During the traditional smelting process, molten metal easily reacts with gases such as oxygen in the air to generate impurities such as oxides. At the same time, harmful gases such as hydrogen and nitrogen may exist in the melt. These substances will significantly reduce the purity of the molten metal, causing defects such as pores and inclusions in the castings, seriously affecting their mechanical properties and reliability. In addition, if the slag generated during the smelting process is not effectively removed, it will also mix into the molten metal, further deteriorating the quality of the castings. Therefore, how to solve the above problems needs to be considered. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a casting smelting equipment. During actual use, the equipment can use argon gas to blow away oxygen and other gases that affect smelting in the molten metal, thereby facilitating smelting quality. At the same time, the slag can be brought to the surface of the molten metal and removed during drainage, thereby ensuring the actual quality of the molten metal after smelting.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: The top end of the lifting block is connected to the lifting block by the spring, and the bottom end of the lifting block is connected to the lifting block by the spring.

[0005] Preferably, the sealing mechanism comprises a sealing cover arranged at the upper end of the cylindrical shell, the sealing cover is connected to an air release pipe, and the lower end of the sealing cover is fixedly connected to a sealing ring.

[0006] Preferably, the upper end of the U-shaped frame is fixedly connected to a vertical bar, a slide groove is opened on the right side of the vertical bar, a threaded rod is rotatably connected between the upper and lower inner walls of the slide groove, a connecting bar is threadedly connected to the threaded rod, and the right side of the connecting bar passes through the notch of the slide groove and is fixedly connected to the left side of the sealing cover.

[0007] Preferably, a first motor is installed at the upper end of the vertical bar, the output shaft of the first motor extends into the slide groove and is fixedly connected to the upper end of the threaded rod, and the first motor is a servo motor that can change the rotation direction.

[0008] Preferably, the inner bottom space of the first columnar tank is connected to a molten metal discharge pipe, and a heating component is installed on the inner wall of the first columnar tank.

[0009] Preferably, the stirring mechanism includes a rotating tube rotatably connected to the upper end of the supporting piston plate, a plurality of first stirring rods are fixedly connected to the rotating tube, and a plurality of second stirring rods are fixedly connected to the outer side of the upper end portion of the rotating tube.

[0010] Preferably, an annular groove is provided at the inner bottom of the second columnar groove, an annular filter is provided inside the annular groove, and the inner bottom of the annular groove is connected to the conical groove through a plurality of inclined openings.

[0011] Preferably, the air blowing mechanism includes a second motor installed at the lower end of the supporting piston plate, the second motor adopts a dual-axis motor, the lower end of the rotating tube passes through the supporting piston plate, and pulleys are installed on the upper end output shaft of the rotating tube and the second motor, and the two pulleys are connected by a transmission belt.

[0012] Preferably, the lower end of the supporting piston plate is fixedly connected to a connecting seat, the lower end of the connecting seat is fixedly connected to a piston cylinder, a piston block that can slide back and forth is provided in the piston cylinder, the lower end output shaft of the second motor is fixedly connected to a driving disk, the eccentric point of the lower end of the driving disk is rotatably connected to the front side of the piston block through a driving rod, the rear space of the piston cylinder is connected to a first one-way tube and a second one-way tube, and a one-way valve is installed inside the first one-way tube and the second one-way tube, two stirring tubes are fixedly connected to the outside of the rotating tube, each of the stirring tubes is sealed at one end away from the rotating tube, the two stirring tubes are connected to the rotating tube, a plurality of air holes are opened on the inner top of the two stirring tubes, and the other end of the second one-way tube is connected to the lower end of the rotating tube.

[0013] The present invention also discloses a smelting method of the casting smelting equipment, which uses the above-mentioned smelting equipment and includes the following steps: Step 1: Select appropriate metal raw materials according to the material requirements of the target casting, load the metal raw materials into the smelting equipment in a predetermined order and precise proportion, and start the smelting equipment for heating and smelting.

[0014] Step 2: Check the integrity of the ladle to ensure that there are no cracks or leakages in the ladle, preheat the ladle, and pour the molten metal into the ladle; Step 3: Control the pouring speed according to the size, shape and wall thickness of the casting to prevent the molten metal from generating violent eddy currents and inclusions during the pouring process to ensure the internal quality of the casting; Step 4: After the casting is completed, let it cool naturally and observe whether the casting has cracks and deformation until the molten metal is completely solidified to form a metal casting.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The second motor drives the rotating tube and the stirring rod to rotate and stir the molten metal, which can effectively promote the homogenization of the molten metal composition, avoid local composition differences, ensure the consistency of the molten metal composition after smelting, and improve the performance stability of the casting.

[0016] 2. The second motor drives the piston block to move back and forth, allowing argon gas to enter the molten metal. The argon gas can remove waste gas in the molten metal and promote the floating of slag, which helps to purify the molten metal, reduce the impact of impurities on the quality of the casting, and improve the purity of the casting.

[0017] 3. During the slag floating process, the second stirring rod diffuses the slag to the surface away from the opening. When the supporting piston plate moves downward, the molten metal enters the first columnar groove through the annular groove and the inclined opening, which can filter the slag and effectively separate the slag from the molten metal.

[0018] 4. Starting the first motor can make the sealing cover rise and open the upper end of the cylindrical shell, making it convenient to clean the annular filter, ensuring the filtering effect of the annular filter, extending the service life of the equipment and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a casting smelting equipment proposed by the present invention; Figure 2 for Figure 1 Schematic cross-sectional view of ; Figure 3 for Figure 2 Schematic diagram after removing the annular filter; Figure 4 for Figure 3 A magnified view of point A; Figure 5 It is a structural diagram of the air blowing mechanism.

[0020] In the figure: 1 base plate, 2 U-shaped frame, 3 cylindrical shell, 4 vertical bar, 5 first motor, 6 slide groove, 7 threaded rod, 8 connecting bar, 9 sealing cover, 10 vent pipe, 11 mounting bar, 12 hydraulic telescopic rod, 13 supporting piston plate, 14 molten metal discharge pipe, 15 first columnar groove, 16 second columnar groove, 17 sealing ring, 18 annular groove, 19 annular filter, 20 heating component, 21 rotating tube, 22 first stirring rod, 23 second stirring rod, 24 through port, 25 conical groove, 26 inclined port, 27 second motor, 28 pulley, 29 transmission belt, 30 connecting seat, 31 piston cylinder, 32 first one-way pipe, 33 second one-way pipe, 34 rotary joint, 35 stirring pipe, 36 drive plate, 37 drive rod, 38 piston block. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] Reference Figure 1-Figure 5, a casting smelting equipment, including a base plate 1, the upper end of the base plate 1 is connected to a U-shaped frame 2, a mounting bar 11 is fixedly connected between the two vertical parts of the U-shaped frame 2, a cylindrical shell 3 is fixedly connected between the two mounting bars 11, the lower end of the cylindrical shell 3 is provided with a first cylindrical groove 15, the upper end of the cylindrical shell 3 is provided with a second cylindrical groove 16, the upper end of the horizontal part of the U-shaped frame 2 is symmetrically fixedly connected with two hydraulic telescopic rods 12, the telescopic ends of the two hydraulic telescopic rods 12 both extend into the first cylindrical groove 15, and are fixedly connected with a supporting piston plate 13. In the initial position, the supporting piston plate 13 is located above the connection between the molten metal discharge pipe 14 and the first cylindrical groove 15, the supporting piston plate 13 is slidably connected to the inner wall of the first cylindrical groove 15, the inner top of the first cylindrical groove 15 is provided with a conical groove 25, and the inner top of the conical groove 25 is connected to the second cylindrical groove 16 through a through opening 24; As an embodiment of the present invention, a sealing mechanism is further included, which is configured to seal the upper end surface of the second cylindrical groove 16. The sealing mechanism includes a sealing cover 9 provided at the upper end of the cylindrical housing 3. The sealing cover 9 is connected to a gas discharge pipe 10. The other end of the gas discharge pipe 10 is connected to an external gas treatment device to facilitate the collection and treatment of exhaust gas. A sealing ring 17 is fixedly connected to the lower end of the sealing cover 9. As an embodiment of the present invention, the upper end of the U-shaped frame 2 is fixedly connected to a vertical bar 4, a slide groove 6 is opened on the right side of the vertical bar 4, a threaded rod 7 is rotatably connected between the upper and lower inner walls of the slide groove 6, a connecting bar 8 is threadedly connected to the threaded rod 7, the right side of the connected connecting bar 8 passes through the notch of the slide groove 6, and is fixedly connected to the left side of the sealing cover 9, and a first motor 5 is installed on the upper end of the vertical bar 4, the output shaft of the first motor 5 extends into the slide groove 6 and is fixedly connected to the upper end of the threaded rod 7, the first motor 5 is a servo motor that can change the rotation direction, and the feeding operation and the subsequent cleaning operation of the annular filter 19 can be facilitated by lifting and lowering the sealing cover 9; As an embodiment of the present invention, the inner bottom space of the first cylindrical tank 15 is connected to a molten metal discharge pipe 14. A heating assembly 20 is installed on the inner wall of the first cylindrical tank 15. The heating assembly 20 uses a spiral coil heater to process the metal to a required temperature. As an embodiment of the present invention, it also includes a stirring mechanism, which is used to promote the homogenization of the components. The stirring mechanism includes a rotating tube 21 rotatably connected to the upper end of the supporting piston plate 13, and a plurality of first stirring rods 22 are fixedly connected to the rotating tube 21. A plurality of second stirring rods 23 are fixedly connected to the outer side of the upper end portion of the rotating tube 21. The plurality of second stirring rods 23 are shorter and can pass through the through-hole 24. Furthermore, in actual use, when the metal is initially melted, the supporting piston plate 13 is in a lower position. Subsequently, when the metal is completely melted, the hydraulic telescopic rod 12 is started to extend, so that the supporting piston plate 13 moves upward, and the liquid level of the molten metal is higher than the height of the through-hole 24, so as to facilitate the subsequent scum removal operation. As one embodiment of the present invention, an annular groove 18 is formed at the inner bottom of the second cylindrical groove 16. An annular filter 19 is disposed within the annular groove 18. The inner bottom of the annular groove 18 communicates with the conical groove 25 via a plurality of inclined openings 26. A filter is also installed at the connection between the inclined openings 26 and the conical groove 25 to ensure that the scum completely moves upward along the inclined surface of the conical groove 25 and eventually passes through the opening 24 and enters the second cylindrical groove 16. As an embodiment of the present invention, it also includes an air blowing mechanism, which is used to remove waste gas in the molten metal and promote the floating of slag. The air blowing mechanism includes a second motor 27 installed at the lower end of the supporting piston plate 13. The second motor 27 adopts a dual-axis motor. The lower end of the rotating tube 21 passes through the supporting piston plate 13. The rotating tube 21 and the upper output shaft of the second motor 27 are both equipped with pulleys 28. The two pulleys 28 are connected by a transmission belt 29. The lower end of the supporting piston plate 13 is fixedly connected to a connecting seat 30. The lower end of the connecting seat 30 is fixedly connected to a piston cylinder 31. A piston block 38 that can slide back and forth is provided in the piston cylinder 31. The lower end output shaft of the second motor 27 is fixedly connected to a drive disk 36. The eccentric lower end of the drive disk 36 is connected to the front side of the piston block 38 through a drive rod 37 for rotation. The rear space of the piston cylinder 31 is connected with a first one-way tube 32 and a second one-way tube 33, and one-way valves are installed inside the first one-way tube 32 and the second one-way tube 33. Two stirring tubes 35 are fixedly connected to the outside of the rotating tube 21, and each stirring tube 35 is sealed at one end away from the rotating tube 21. The two stirring tubes 35 are connected to the rotating tube 21, and a plurality of air holes are provided on the inner top of the two stirring tubes 35. The other end of the second one-way tube 33 is connected to the lower end of the rotating tube 21. The first one-way tube 32 is a soft tube, and the other end thereof is connected to an external argon tank. Through the forward and backward movement of the piston block 38, in conjunction with the one-way valves inside the first one-way tube 32 and the second one-way tube 33, a one-way argon flow can be generated in the argon tank, the piston cylinder 31 and the stirring tube 35. The argon is finally discharged from the multiple air holes and enters the molten metal.

[0024] In the present invention, in the initial position, the supporting piston plate 13 is located above the connection point between the molten metal discharge pipe 14 and the first cylindrical groove 15. When feeding is required, the first motor 5 is started. The first motor 5 is a servo motor with a variable rotation direction. Its output shaft drives the threaded rod 7 to rotate. The rotation of the threaded rod 7 causes the connecting bar 8 to drive the sealing cover 9 to move upward, thereby opening the upper end of the cylindrical shell 3, making it convenient to feed the metal to be smelted into the second cylindrical groove 16. After the metal is put in, the first motor 5 is started to rotate in the reverse direction, so that the sealing cover 9 moves down again to the sealing state, and then the heating component 20 (using a spiral coil heater) is started to heat the metal to the required temperature to melt it into liquid metal; After the metal is completely melted, the hydraulic telescopic rod 12 is extended, pushing the supporting piston plate 13 upward, so that the liquid level of the molten metal is higher than the height of the opening 24, preparing for the subsequent scum removal operation. At the same time, the second motor 27 is started. The output shaft at the upper end of the second motor 27 drives the rotating tube 21 to rotate through the pulley 28 and the transmission belt 29. The multiple first stirring rods 22 and the multiple second stirring rods 23 on the rotating tube 21 rotate accordingly, stirring the molten metal and promoting the homogenization of the composition. The output shaft at the lower end of the second motor 27 drives the drive disc 36 to rotate, and the drive rod 37 at the eccentric lower end of the drive disc 36 drives the piston block 38 to slide back and forth in the piston cylinder 31. Since one-way valves are installed inside the first one-way tube 32 and the second one-way tube 33, and the other end of the first one-way tube 32 (soft tube) is connected to the external argon tank, and the other end of the second one-way tube 33 is connected to the lower end of the rotating tube 21, the forward and backward movement of the piston block 38 causes the argon gas in the argon tank to enter the rear space of the piston cylinder 31 through the first one-way tube 32, and then enter the rotating tube 21 through the second one-way tube 33, and finally be discharged from the multiple air holes at the top of the two stirring tubes 35 into the molten metal. The introduction of argon gas can remove waste gas in the molten metal and promote the floating of slag; The scum will move up along the slope of the conical groove 25 and eventually move from the opening 24 to the surface of the molten metal. During this process, the rotation of the second stirring rod 23 will cause the scum to move away from the center of the liquid surface and spread to the surface away from the opening 24. After 5-10 minutes, the scum has basically completed floating up. At this time, the hydraulic telescopic rod 12 is started to contract, driving the supporting piston plate 13 to move down to the initial position. During the downward movement, part of the molten metal in the second columnar groove 16 enters the first columnar groove 15 through the opening 24, and the other part passes through the annular groove 18 and enters the first columnar groove 15 through the multiple inclined openings 26. Since the scum is at a position away from the opening 24, the scum is located above the annular groove 18. In the process of the molten metal passing through the annular groove 18 and entering the first columnar groove 15 through the multiple inclined openings 26, the scum can be filtered to achieve scum separation, and then smelting is carried out for a period of time. Then the hydraulic telescopic rod 12 is activated to retract. When the supporting piston plate 13 is lower than the connection point between the molten metal discharge pipe 14 and the first columnar groove 15, the molten metal is discharged through the molten metal discharge pipe 14. When the annular filter 19 needs to be cleaned, the first motor 5 is started to rotate the threaded rod 7 in the opposite direction, driving the connecting strip 8 and the sealing cover 9 to move upward, opening the upper end of the cylindrical shell 3, and then the annular filter 19 can be cleaned.

[0025] The present invention also discloses a smelting method of the casting smelting equipment, which uses the above-mentioned smelting equipment and includes the following steps: Step 1: Select appropriate metal raw materials according to the material requirements of the target casting, load the metal raw materials into the smelting equipment in a predetermined order and precise proportion, and start the smelting equipment for heating and smelting.

[0026] Step 2: Check the integrity of the ladle to ensure that there are no cracks or leakages in the ladle, preheat the ladle, and pour the molten metal into the ladle; Step 3: Control the pouring speed according to the size, shape and wall thickness of the casting to prevent the molten metal from generating violent eddy currents and inclusions during the pouring process to ensure the internal quality of the casting; Step 4: After the casting is completed, let it cool naturally and observe whether the casting has cracks and deformation until the molten metal is completely solidified to form a metal casting.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A casting smelting equipment, characterized in that: include: A bottom plate (1), the upper end of the bottom plate (1) is connected to a U-shaped frame (2), a mounting bar (11) is fixedly connected between the two vertical parts of the U-shaped frame (2), a cylindrical shell (3) is fixedly connected between the two mounting bars (11), the lower end of the cylindrical shell (3) is provided with a first columnar groove (15), the upper end of the cylindrical shell (3) is provided with a second columnar groove (16), the upper end of the horizontal part of the U-shaped frame (2) is symmetrically fixedly connected to two hydraulic telescopic rods (12), the telescopic ends of the two hydraulic telescopic rods (12) both extend into the first columnar groove (15), and are fixedly connected to a supporting piston plate (13), the supporting piston plate (13) is slidably connected to the inner wall of the first columnar groove (15), the inner top of the first columnar groove (15) is provided with a conical groove (25), and the inner top of the conical groove (25) is connected to the second columnar groove (16) through a through opening (24); A sealing mechanism, the sealing mechanism being configured to seal the upper end surface of the second columnar groove (16); A stirring mechanism, the stirring mechanism is used to promote homogenization of the ingredients; The air blowing mechanism is used to remove waste gas in the molten metal and promote the floating of slag.

2. The casting smelting equipment according to claim 1, characterized in that: The sealing mechanism comprises a sealing cover (9) arranged at the upper end of the cylindrical shell (3), the sealing cover (9) is connected to an air release pipe (10), and the lower end of the sealing cover (9) is fixedly connected to a sealing ring (17).

3. The casting smelting equipment according to claim 2, characterized in that: The upper end of the U-shaped frame (2) is fixedly connected to a vertical bar (4), a slide groove (6) is provided on the right side of the vertical bar (4), a threaded rod (7) is rotatably connected between the upper and lower inner walls of the slide groove (6), a connecting bar (8) is threadedly connected to the threaded rod (7), and the right side of the connecting bar (8) passes through the notch of the slide groove (6) and is fixedly connected to the left side of the sealing cover (9).

4. The casting smelting equipment according to claim 3, characterized in that: A first motor (5) is installed at the upper end of the vertical bar (4), and an output shaft of the first motor (5) extends into the slide groove (6) and is fixedly connected to the upper end of the threaded rod (7). The first motor (5) is a servo motor capable of changing the direction of rotation.

5. The casting smelting equipment according to claim 1, characterized in that: The inner bottom space of the first columnar groove (15) is connected to a molten metal discharge pipe (14), and a heating component (20) is installed on the inner wall of the first columnar groove (15).

6. The casting smelting equipment according to claim 1, characterized in that: The stirring mechanism comprises a rotating tube (21) rotatably connected to the upper end of the supporting piston plate (13), a plurality of first stirring rods (22) being fixedly connected to the rotating tube (21), and a plurality of second stirring rods (23) being fixedly connected to the outer side of the upper end portion of the rotating tube (21).

7. The casting smelting equipment according to claim 6, characterized in that: An annular groove (18) is provided at the inner bottom of the second columnar groove (16), an annular filter (19) is provided inside the annular groove (18), and the inner bottom of the annular groove (18) is connected to the conical groove (25) through a plurality of inclined openings (26).

8. The casting smelting equipment according to claim 6, characterized in that: The air blowing mechanism includes a second motor (27) mounted on the lower end of the supporting piston plate (13), wherein the second motor (27) is a double-shaft motor. The lower end of the rotating tube (21) passes through the supporting piston plate (13), and pulleys (28) are mounted on the upper output shafts of the rotating tube (21) and the second motor (27). The two pulleys (28) are connected by a transmission belt (29).

9. The casting smelting equipment according to claim 8, characterized in that: The lower end of the supporting piston plate (13) is fixedly connected to a connecting seat (30), the lower end of the connecting seat (30) is fixedly connected to a piston cylinder (31), a piston block (38) that can slide back and forth is provided in the piston cylinder (31), the lower end output shaft of the second motor (27) is fixedly connected to a driving disk (36), the lower end eccentric portion of the driving disk (36) is connected to the front side of the piston block (38) through a driving rod (37), and the rear side space of the piston cylinder (31) is connected to a first one-way tube (32). and a second one-way tube (33), one-way valves are installed inside the first one-way tube (32) and the second one-way tube (33), two stirring tubes (35) are fixedly connected to the outside of the rotating tube (21), one end of each stirring tube (35) away from the rotating tube (21) is sealed, the two stirring tubes (35) are communicated with the rotating tube (21), a plurality of air holes are opened on the inner top of the two stirring tubes (35), and the other end of the second one-way tube (33) is communicated with the lower end of the rotating tube (21).

10. A smelting method for casting smelting equipment, using the smelting equipment according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Select appropriate metal raw materials according to the material requirements of the target casting, load the metal raw materials into the smelting equipment in a predetermined order and precise proportion, and start the smelting equipment for heating and smelting; Step 2: Check the integrity of the ladle to ensure that there are no cracks or leakages in the ladle, preheat the ladle, and pour the molten metal into the ladle; Step 3: Control the pouring speed according to the size, shape and wall thickness of the casting to prevent the molten metal from generating violent eddy currents and inclusions during the pouring process to ensure the internal quality of the casting; Step 4: After the casting is completed, let it cool naturally and observe whether the casting has cracks and deformation until the molten metal is completely solidified to form a metal casting.

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