Nodular cast iron casting casting device

Abstract

The invention discloses a nodular cast iron casting casting device, and relates to the technical field of casting, the casting casting device comprises a centrifugal casting mechanism, the centrifugal casting mechanism comprises a mold cylinder and a centrifugal driving assembly, the output end of the centrifugal driving assembly is in transmission connection with the mold cylinder, and the centrifugal driving assembly is used for driving the horizontally arranged mold cylinder to rotate; the material uniformizing mechanism comprises a material uniformizing barrel and a material uniformizing driving assembly, the output end of the material uniformizing driving assembly is in transmission connection with the material uniformizing barrel, the material uniformizing driving assembly is used for driving the material uniformizing barrel to rotate, a plurality of material uniformizing holes are formed in the barrel wall of the material uniformizing barrel, and in the liquid injection state, the material uniformizing barrel is located in the mold barrel and is coaxially arranged with the mold barrel; the rotating direction of the material uniformizing barrel is the same as that of the mold barrel, and the rotating speed of the material uniformizing barrel is higher than that of the mold barrel; the liquid injection mechanism is arranged in the material uniformizing barrel, and the liquid injection mechanism is used for conveying the molten liquid into the material uniformizing barrel; according to the casting device, the metal liquid can be uniformly sprayed, and the wall thickness deviation is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of casting, and particularly relates to a ductile iron casting device. BACKGROUND

[0002] In the field of modern industrial manufacturing, ductile iron is widely used in key industries such as automobile manufacturing, mechanical equipment, energy and power, and rail transportation due to its excellent mechanical properties, such as high strength, high toughness, good wear resistance, and fatigue resistance.

[0003] Ductile iron casting processes include resin sand casting, wet sand casting, centrifugal casting, and lost foam casting. Various processes must ensure the nodularity, microstructure, and mechanical properties of ductile iron. For example, the resin sand casting process involves pouring molten metal into a cavity in a casting mold that matches the shape of the part, and then cooling to obtain the part or blank. For pipe castings, centrifugal casting is currently the main method used. Centrifugal casting is suitable for large batches of castings that require little or no machining.

[0004] However, existing centrifugal casting devices directly inject molten metal into the inner cavity of a high-speed rotating mold on one side during casting, causing the metal to accumulate at the injection site and then spread outward under the influence of centrifugal force. This spreading process is prone to inertia accumulation (in the centrifugal casting environment, "inertia accumulation" refers to the phenomenon of local accumulation of molten metal during diffusion in the mold due to the combined effects of the initial momentum of one-sided injection and the centrifugal force of mold rotation). This results in uneven thickness of the metal in the circumferential direction of the mold, ultimately causing wall thickness deviation in the castings, affecting dimensional accuracy and structural stability. SUMMARY

[0005] The purpose of the present application is to provide a ductile iron casting device that is simple in structure and reasonable in design to solve the above problems.

[0006] The present application achieves the above-mentioned purposes through the following technical solutions: A ductile iron casting device, comprising: A centrifugal casting mechanism, including a mold cylinder and a centrifugal drive assembly, the output end of the centrifugal drive assembly being in transmission connection with the mold cylinder, and the centrifugal drive assembly being used to drive the mold cylinder to rotate, wherein the cylinder axis of the mold cylinder is horizontally arranged. The uniform material mechanism comprises a uniform material cylinder and a uniform material driving assembly, the output end of the uniform material driving assembly is in transmission connection with the uniform material cylinder, the uniform material driving assembly is used for driving the uniform material cylinder to rotate, a plurality of uniform material holes are formed in the cylinder wall of the uniform material cylinder, and in the liquid injection state, the uniform material cylinder is located in the mold cylinder and is coaxially arranged with the mold cylinder, wherein the rotating direction of the uniform material cylinder is the same as the rotating direction of the mold cylinder, and under the driving of the uniform material driving assembly, the rotating speed of the uniform material cylinder is greater than the rotating speed of the mold cylinder. The liquid injection mechanism is arranged in the uniform material cylinder, and the liquid injection mechanism is used for conveying the molten liquid into the uniform material cylinder.

[0007] As a further optimization scheme of the application, the centrifugal driving assembly comprises a first driving gear, a first driven gear, a first motor, a supporting wheel and a limiting roller, the output end of the first motor is in transmission connection with the first driving gear, the first driving gear is in meshing transmission with the first driven gear, and the first driven gear is fixedly arranged on the outer periphery of the mold cylinder; the outer periphery of the mold cylinder is also fixedly provided with the supporting wheel, and the supporting wheel is in rolling connection with the limiting roller.

[0008] As a further optimization scheme of the application, the uniform material driving assembly comprises a second motor, a second driving gear and a second driven gear, the output end of the second motor is in transmission connection with the second driving gear, the second driving gear is in meshing transmission with the second driven gear, and the second driven gear is fixedly arranged on the uniform material cylinder; the uniform material cylinder is rotatably arranged on the second sliding seat.

[0009] As a further optimization scheme of the application, the liquid injection mechanism comprises a liquid injection pipe, the liquid injection pipe extends into the uniform material cylinder, a liquid injection opening is formed in the side of the liquid injection pipe, and a sealing assembly is arranged on one side of the liquid injection opening; the sealing assembly is used for sealing the liquid injection opening after the liquid injection is completed.

[0010] As a further optimization scheme of the application, the sealing assembly comprises a sealing driving assembly, a sealing plate, a clamping plate and a side baffle, the output end of the sealing driving assembly is in transmission connection with the sealing plate, the sealing plates are arranged in pairs, and along the axis direction of the liquid injection pipe, the sealing plates arranged in pairs are symmetrically arranged on the two sides of the liquid injection opening; along the axis direction of the liquid injection pipe, the two ends of the liquid injection opening are respectively fixedly connected with the side baffles, the two ends of the sealing plate are respectively fixedly provided with the clamping plates, the clamping grooves are formed in the clamping plates, and the clamping grooves are correspondingly arranged with the side baffles. When the sealing plate is located at the initial position, the liquid injection opening is opened, and the clamping plate is arranged in space with the side baffle; when the sealing plate is located at the sealing position, the clamping plate is sealed and abuts against the side baffle through the clamping groove, and the receiving area is formed between the side baffle and the sealing plate.

[0011] As a further optimization scheme of the present application, the sealing drive assembly comprises a third motor, a third driving gear, a pair of third driven gears and a main shaft, the output end of the third motor is drivingly connected with the third driving gear, the pair of third driven gears are arranged in pairs and mesh with each other, and the third driving gear is drivingly meshed with one of the third driven gears, the third driven gears are fixedly arranged on the corresponding main shaft, the main shaft is fixedly connected with a swing arm at one end away from the main shaft, and the swing arm is fixedly connected with the sealing plate, wherein the third motor and the third driving gear are arranged on the second sliding seat respectively.

[0012] As a further optimization scheme of the present application, the sealing plate is embedded with a heating element, the heating element is used for heating and keeping warm the metal solution in the accommodation area, and the heating element is electrically connected with the temperature control element.

[0013] As a further optimization scheme of the present application, the limiting roller and the first motor are arranged on the first sliding seat respectively, the second motor and the second driving gear are arranged on the second sliding seat, the first sliding seat is arranged at the output end of the first linear displacement mechanism, the first linear displacement mechanism is used for driving the first sliding seat to reciprocate along the axis direction of the material uniformizing cylinder, and the second sliding seat is arranged at the output end of the second linear displacement mechanism, and the second linear displacement mechanism is used for driving the second sliding seat to reciprocate along the axis direction of the mold cylinder. The inside of the mold cylinder is further provided with a material pulling plate, the circumferential side wall of the material pulling plate is attached to the circumferential inner wall of the mold cylinder, one side of the material pulling plate away from the feeding end of the mold cylinder is provided with a limiting block, the limiting block is in clamping fit with the bottom end of the mold cylinder, a guide rod is slidingly installed in the inside of the material pulling plate, a pressing block is fixedly connected with the outer end of the guide rod, a locking rod is fixedly connected with the inner end of the guide rod, a spring is sleeved with one end of the guide rod close to the locking rod, the locking rod has locking teeth at the outer position of the material pulling plate, and a locking groove is formed at the shaft end of the material uniformizing cylinder, and the locking teeth are connected with the material uniformizing cylinder through the locking groove. The mold cylinder is provided below with a lifting assembly, when the first linear displacement mechanism drives the first sliding seat to move the mold cylinder to the unloading position away from the material uniformizing cylinder, the lifting part of the lifting assembly holds the centrifugal casting formed pipe, and under the driving of the driving part of the lifting assembly, the lifting part holds the pipe to move downward to press the pipe against the pressing block, and the locking teeth are out of the locking groove.

[0014] As a further optimization scheme of the application, the first linear displacement mechanism comprises a fourth motor, a first sliding rail, a first screw rod and a first sliding block, the output end of the fourth motor is drivingly connected with the first screw rod, the two ends of the first screw rod are rotatably connected on the first sliding rail, the first sliding block is threadedly connected on the first screw rod, and the first sliding block is slidingly connected with the first sliding rail, the first sliding seat is fixedly arranged on the first sliding block, the second linear displacement mechanism comprises a fifth motor, a second sliding rail, a second screw rod and a second sliding block, the output end of the fifth motor is drivingly connected with the second screw rod, the two ends of the second screw rod are rotatably connected on the second sliding rail, the second sliding block is threadedly connected on the second screw rod, and the second sliding block is slidingly connected with the second sliding rail, and the second sliding seat is fixedly arranged on the second sliding block.

[0015] As a further optimization scheme of the application, the end plate is fixedly arranged on the material uniformizing cylinder, and the end plate frictionally abuts against the feeding end of the mold cylinder when the material uniformizing cylinder is located at the material uniformizing position.

[0016] The application has at least the following advantages: the foundry device for ductile iron casting provided by the application comprises a centrifugal casting mechanism, a material uniformizing mechanism and a liquid injection mechanism, the centrifugal casting mechanism comprises a mold cylinder and a centrifugal driving assembly, the material uniformizing mechanism comprises a material uniformizing cylinder and a material uniformizing driving assembly, the material uniformizing cylinder is arranged in the mold cylinder, and the material uniformizing cylinder is controlled to rotate in the same direction with the mold cylinder, so that the metal liquid injected by the liquid injection mechanism into the material uniformizing cylinder is dispersed circumferentially through the material uniformizing holes of the material uniformizing cylinder first, and the metal liquid thrown onto the mold cylinder has an initial linear velocity, can overcome the surface tension and viscous resistance more quickly, spread along the inner surface of the mold cylinder, so that the metal liquid can cover the inner surface of the mold cylinder more uniformly, and the rotating speed of the material uniformizing cylinder is greater than that of the mold cylinder, so that the dispersed liquid with high initial speed can flow along the rotating direction of the mold cylinder more efficiently, and the relative speed difference with the inner wall of the mold cylinder is smaller (same direction movement), the impact splashing is reduced, the local missing or oxidation on the mold cylinder caused by the splashing of the metal liquid is avoided, and the wall thickness deviation is reduced sufficiently. Moreover, the sealing assembly is arranged near the liquid injection opening of the liquid injection pipe, the sealing assembly comprises a sealing driving assembly, a sealing plate, a clamping plate and a side baffle, when the liquid injection is finished, the residual metal liquid near the liquid injection opening in the liquid injection pipe will gather to the liquid injection opening, therefore, the sealing plate is driven by the sealing driving assembly to swing to a sealing position, a storage area composed of the sealing plate and the side baffle is formed below the liquid injection opening, the residual metal liquid is temporarily stored, the metal liquid is prevented from dropping onto the surface of the pipe fitting which has been centrifugally cast, and the local wall thickness is prevented from increasing. In addition, the metal liquid stored in the storage area always keeps in a molten state under the heat preservation of the heating element in the sealing plate, when the next pipe fitting is centrifugally cast, after the sealing plate returns to the initial position, the stored metal liquid can continue to be used as the raw material of the casting, resources are saved, and the blockage problem caused by the exposure of the liquid injection opening in the traditional way is avoided. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the invention Figure 1 A schematic diagram of the front structure; Figure 3 This is a partial cross-sectional view of the mold cylinder, the material leveling mechanism, and the liquid injection pipe of the present invention. Figure 4 This is the present invention. Figure 3 Enlarged view of point A in the middle; Figure 5 This is the present invention. Figure 3 Enlarged view at point B in the middle; Figure 6 This is a partial structural schematic diagram of the injection tube and sealing assembly of the present invention; Figure 7 This is the present invention. Figure 6 Enlarged view at point C; Figure 8 This is a partial cross-sectional view of the injection tube and sealing assembly of the present invention along the radial direction of the injection tube. Figure 9 This is a front view of the overall structure of the present invention when the pipe is removed; Figure 10 This is a schematic diagram of the mold cylinder and centrifugal drive assembly of the present invention; Figure 11 This is a schematic diagram of the structure of the first linear shifting mechanism and the second linear shifting mechanism of the present invention.

[0018] In the diagram: 1. Mold cylinder; 11. First driven gear; 12. First driving gear; 13. First motor; 14. Limiting gear; 15. Support wheel; 16. Limiting roller; 2. First linear shifting mechanism; 21. Fourth motor; 22. First slide rail; 23. First lead screw; 24. First slider; 25. First slide block; 3. Material feeding mechanism; 31. Material feeding cylinder; 32. Second motor; 33. Second driving gear; 34. Second driven gear; 35. End plate; 36. Material feeding hole; 37. Pulling plate; 38. Limiting block; 39. Pressing block; 310. Guide rod; 311. Spring; 12. Locking rod; 313. Locking tooth; 314. Locking groove; 4. Injection mechanism; 41. Transfer groove; 42. Injection pipe; 421. Relief groove; 422. Injection port; 43. Third motor; 44. Third driving gear; 45. Third driven gear; 46. Main shaft; 47. Swing arm; 48. Sealing plate; 481. Heating element; 482. Temperature control element; 49. Side baffle; 410. Snap-fit ​​plate; 411. Snap-fit ​​groove; 5. Second linear displacement mechanism; 51. Fifth motor; 52. Second slide rail; 53. Second lead screw; 54. Second slider; 55. Second slide block; 6. Lifting assembly. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown in the figure, this embodiment provides a casting apparatus for ductile iron castings, comprising: The centrifugal casting mechanism includes a mold cylinder 1 and a centrifugal drive assembly. The output end of the centrifugal drive assembly is connected to the mold cylinder 1 for transmission. The centrifugal drive assembly is used to drive the mold cylinder 1 to rotate. The cylinder axis of the mold cylinder 1 is set horizontally. The material leveling mechanism 3 includes a material leveling cylinder 31 and a material leveling drive assembly. The output end of the material leveling drive assembly is connected to the material leveling cylinder 31 for transmission. The material leveling drive assembly is used to drive the material leveling cylinder 31 to rotate. The material leveling cylinder 31 has a plurality of material leveling holes 36 on its cylinder wall. In the liquid injection state, the material leveling cylinder 31 is located in the mold cylinder 1 and is coaxially arranged with the mold cylinder 1. The rotation direction of the material leveling cylinder 31 is the same as the rotation direction of the mold cylinder 1. Under the drive of the material leveling drive assembly, the rotation speed of the material leveling cylinder 31 is greater than the rotation speed of the mold cylinder 1. The liquid injection mechanism 4 is installed in the uniform material cylinder 31. The liquid injection mechanism 4 is used to transport molten liquid to the uniform material cylinder 31.

[0021] In the above embodiment, the liquid injection mechanism 4 delivers the metal molten liquid into the homogenizing cylinder 31, and the liquid is uniformly dispersed onto the inner wall of the mold cylinder 1 through the homogenizing holes 36 by the rotation of the homogenizing cylinder 31. Compared with the traditional molten liquid column directly injected onto the inner wall of the mold cylinder 1 by relying on its own gravity, the dispersed metal liquid can more uniformly cover the inner surface of the mold cylinder 1. The rotation speed of the homogenizing cylinder 31 is greater than that of the mold cylinder 1, so that the metal liquid has a certain initial linear velocity when it is thrown by the homogenizing cylinder 31 onto the mold cylinder 1. When the metal liquid with high initial velocity contacts the inner wall of the mold cylinder 1, it can quickly overcome the surface tension and viscous resistance to spread along the inner surface of the mold cylinder 1. Moreover, the rotation speed of the homogenizing cylinder 31 is greater than that of the mold cylinder 1, so that the dispersed liquid with high initial velocity can flow more efficiently in the rotation direction of the mold cylinder 1, and the relative speed difference between the liquid and the inner wall of the mold cylinder 1 is smaller (moving in the same direction), reducing the impact and splashing, avoiding the local missing or oxidation on the mold cylinder 1 caused by the splashing of the metal liquid, and fully reducing the wall thickness deviation.

[0022] It should be noted that, continuing to refer to Figure 1 and Figure 10 , the centrifugal driving assembly includes a first driving gear 12, a first driven gear 11, a first motor 13, a supporting wheel 15 and a limiting roller 16. The output end of the first motor 13 is drivingly connected with the first driving gear 12, and the first driving gear 12 is drivingly engaged with the first driven gear 11. The first driven gear 11 is fixedly arranged on the outer periphery of the mold cylinder 1. The outer periphery of the mold cylinder 1 is also fixedly provided with the supporting wheel 15, and the supporting wheel 15 is rollingly connected with the limiting roller 16. The first motor 13 drives the first driving gear 12 to rotate by engaging with the first driven gear 11, so as to finally realize the rotation of the mold cylinder 1. In the rotation process, the supporting wheel 15 on the mold cylinder 1 is limited and constrained by the limiting roller 16, and the first driven gear 11 also drivingly engages with the limiting gear 14, so as to ensure the stable rotation of the mold cylinder 1.

[0023] For example, continuing to refer to Figure 3 , the homogenizing driving assembly includes a second motor 32, a second driving gear 33 and a second driven gear 34. The output end of the second motor 32 is drivingly connected with the second driving gear 33, and the second driving gear 33 drivingly engages with the second driven gear 34. The second driven gear 34 is fixedly arranged on the homogenizing cylinder 31, and the homogenizing cylinder 31 is rotatably arranged on the second sliding seat 55. By driving the second motor 32, the second driving gear 33 drivingly engages with the second driven gear 34 to realize the rotation of the homogenizing cylinder 31.

[0024] For example, continuing to refer to Figure 1 , Figure 2 and Figure 6The liquid injection mechanism 4 comprises a liquid injection pipe 42 extending into the homogenizing cylinder 31, and a liquid injection port 422 is formed on the side of the liquid injection pipe 42. A sealing assembly is arranged on one side of the liquid injection port 422 to seal the liquid injection port 422 when the liquid injection is completed.

[0025] It should be noted that the liquid injection pipe 42 is fixed on the second sliding seat 55, and the input end of the liquid injection pipe 42 is communicated with the rotating injection groove 41. When the liquid injection is performed, the required amount of metal liquid is poured into the rotating injection groove 41. The liquid injection port 422 is provided with a plurality of ports which are uniformly distributed along the axis direction of the liquid injection pipe 42.

[0026] For example, referring to Figure 6 , Figure 7 and Figure 8 , the sealing assembly comprises a sealing driving assembly, a sealing plate 48, a clamping plate 410 and a side baffle 49. The output end of the sealing driving assembly is drivingly connected with the sealing plate 48. The sealing plate 48 is provided in pairs and symmetrically arranged on both sides of the liquid injection port 422 along the axis direction of the liquid injection pipe 42. The two ends of the liquid injection port 422 are respectively fixedly connected with the side baffle 49 along the axis direction of the liquid injection pipe 42. The two ends of the sealing plate 48 are respectively fixedly provided with the clamping plate 410. The clamping plate 410 is provided with a clamping groove 411. The clamping groove 411 is correspondingly arranged with the side baffle 49. When the sealing plate 48 is located at the initial position, the liquid injection port 422 is opened, and the clamping plate 410 is spaced apart from the side baffle 49, as shown in Figure 6 and Figure 7 When the sealing plate 48 is located at the sealing position, the clamping plate 410 is sealingly abutted with the side baffle 49 through the clamping groove 411, and a receiving area is formed between the side baffle 49 and the sealing plate 48, as shown in Figure 8 .

[0027] The opening state of the liquid injection port 422 is controlled by the sealing plate 48. When the liquid injection is completed, the liquid injection port 422 is closed by the sealing plate 48 to prevent the metal solution possibly remaining in the liquid injection pipe 42 from dropping into the homogenizing cylinder 31 through the liquid injection port 422, as shown in Figure 8As shown, after the sealing plate 48 closes the liquid inlet 422, a receiving area is formed between the side baffle 49 and the sealing plate 48, that is, the residual metal solution is received in the receiving area under the aggregation of the liquid inlet 422, instead of being received in the liquid inlet 422. The sealing plate 48 arranged obliquely expands the receiving area below the liquid inlet 422 to increase the receiving space, so that when the casting is finished and the pouring pipe 42 is taken out of the homogenizing cylinder 31, the metal liquid dropped from the liquid inlet 422 will not drop to other working areas, and after cooling, a hard metal block is formed, which is not easy to clean and even scalds the workers. Moreover, when the next pipe is cast, the sealing plate 48 is opened, and the metal liquid collected in the receiving area can be continuously used, saving resources.

[0028] It should be noted that the amount of metal solution poured into the rotating pouring groove 41 includes the amount of residual metal solution in the pouring pipe 42, so as to ensure that the metal solution poured through the pouring pipe 42 meets the required solution amount for centrifugal casting of the pipe. Moreover, when the sealing plate 48 is in the sealing position, the end face of the sealing plate 48 facing the liquid inlet 422 is in sealing abutment with the edge of the liquid inlet 422, and the lower ends of the two sealing plates 48 are in sealing abutment with each other, thereby ensuring the sealing property of the receiving area.

[0029] For example, continuing to refer to Figure 5 , Figure 6 and Figure 8 , the sealing drive assembly includes a third motor 43, a third driving gear 44, a third driven gear 45, and a main shaft 46. The output end of the third motor 43 is drivingly connected with the third driving gear 44. The third driven gears 45 are arranged in pairs and mesh with each other. One of the third driven gears 45 is drivingly meshed with the third driving gear 44. The third driven gears 45 are fixedly arranged on the corresponding main shafts 46. The main shafts 46 are fixedly connected with swing arms 47. The swing arms 47 are fixedly connected with the sealing plates 48 at the ends away from the main shafts 46. The third motor 43 and the third driving gear 44 are arranged on the second sliding seat 55.

[0030] For example, in the orientation shown in Figure 8 , under the driving of the third motor 43, the third driving gear 44 drivingly meshes with one of the third driven gears 45, so that the two third driven gears 45 mesh with each other and rotate in opposite directions, thereby realizing that the two main shafts 46 rotate in opposite directions. The main shafts 46 drive the corresponding sealing plates 48 through the swing arms 47 to realize synchronous rotation, so that the sealing plates 48 are switched between the initial position and the sealing position.

[0031] It should be noted that, considering the diameter size of the liquid injection pipe 42 and the size of the swing radius of the sealing plate 48, a displacement groove 421 can be formed on the circumferential side of the liquid injection port 422 of the liquid injection pipe 42, so that the sealing plate 48 will not be interfered by the liquid injection pipe 42 when it swings.

[0032] As shown in Figure 5 and Figure 8 , the sealing plate 48 is embedded with a heating element 481, which is used to heat and keep warm the molten metal in the accommodation area, preventing the pipe formed by centrifugal casting from being blocked by the liquid metal in the accommodation area due to cooling during the solidification and forming process, and the liquid injection port 422 is blocked due to the liquid injection pipe 42. The heating element 481 is electrically connected with a temperature control element 482, which is arranged on the second sliding seat 55, and the temperature control element 482 is used to adjust the working temperature of the heating element 481.

[0033] For example, referring to Figure 10 , the limiting roller 16 and the first motor 13 are respectively arranged on the first sliding seat 25, referring to Figure 3 , the second motor 32 and the second driving gear 33 are arranged on the second sliding seat 55, referring to Figure 2 , the first sliding seat 25 is arranged at the output end of the first linear displacement mechanism 2, which is used to drive the first sliding seat 25 to reciprocate along the axis direction of the material uniformizing cylinder 31, and the second sliding seat 55 is arranged at the output end of the second linear displacement mechanism 5, which is used to drive the second sliding seat 55 to reciprocate along the axis direction of the mold cylinder 1; Referring to Figure 3 and Figure 4 , the inside of the mold cylinder 1 is further provided with a material pulling plate 37, and the circumferential side wall of the material pulling plate 37 is attached to the circumferential inner wall of the mold cylinder 1. The side of the material pulling plate 37 away from the feeding end of the mold cylinder 1 is provided with a limiting block 38, which is in clamping cooperation with the bottom end of the mold cylinder 1 (for example, the right end of the mold cylinder 1 as shown in Figure 3 ), the inside of the material pulling plate 37 is slidably installed with a guide rod 310, the outer end of the guide rod 310 is fixedly connected with a pressing block 39, the inner end of the guide rod 310 is fixedly connected with a locking rod 312, and the end of the guide rod 310 close to the locking rod 312 is sleeved with a spring 311, the locking rod 312 has a locking tooth 313 at the outer position of the material pulling plate 37, and the axis end of the material uniformizing cylinder 31 is provided with a locking groove 314, and the locking tooth 313 is connected with the material uniformizing cylinder 31 through the locking groove 314. Among them, referring to Figure 9 , the mold cylinder 1 is provided below with a lifting assembly 6, when the first linear displacement mechanism 2 drives the first sliding seat 25 to move the mold cylinder 1 away from the material uniformizing cylinder 31 to the discharging position, the lifting part of the lifting assembly 6 holds the pipe formed by centrifugal castingFigure 9 When the lifting assembly 6 is in the position shown by the dashed line, the pipe is completely separated from the mold cylinder 1; and under the drive of the driving part of the lifting assembly 6, the lifting part lifts the pipe downward to press the pipe against the pressing block 39, so that the locking tooth 313 is out of the locking groove 314.

[0034] For example, the lifting part of the lifting assembly 6 is a V-shaped lifting seat, and the driving part of the lifting assembly 6 is a telescopic cylinder, an electric cylinder, a hydraulic cylinder, etc., which is not limited here.

[0035] In the above embodiment, the mold cylinder 1 is driven to rotate synchronously by the limiting block 38 and the pulling plate 37, at this time, the locking tooth 313 rotates in the locking groove 314, and in this process, the metal casting is formed on the left side of the pulling plate 37 (as an example of the direction shown by the arrow) Figure 3 As an example of the direction shown by the arrow Figure 9 For the pipe cast by centrifugal casting, when it is taken out, the first slide 25 is driven by the first linear displacement mechanism 2 to move the mold cylinder 1 to the right, and the uniform material cylinder 31 pulls the pulling plate 37 through the locking tooth 313, so that the pipe is limited on the left side of the pulling plate 37, and the pipe is pulled out of the mold cylinder 1, and in the process of being pulled out, the pipe is gradually not supported by the mold cylinder 1, so that the lifting assembly 6 is needed for auxiliary support; When the mold cylinder 1 moves to the right to the unloading position, the pipe is completely supported by the lifting assembly 6, at this time, the driving part of the lifting assembly 6 drives the lifting part to move downward, so that the pipe moves downward synchronously to the inner wall of the pipe to abut against the pressing block 39, the guide rod 310 drives the locking rod 312 to move downward, so that the locking tooth 313 is out of the locking groove 314, at this time, under the drive of the second linear displacement mechanism 5, the second slide 55 drives the uniform material cylinder 31 and the liquid injection pipe 42 to move to the left to exit outside the pipe, while the pulling plate 37 still stays in the mold cylinder 1; then the pipe is taken away by the mechanical hand, and the taking-away process is not interfered by the uniform material cylinder 31 and the mold cylinder 1; The inlet end of the locking groove 314 has a circular arc convex part, and the locking tooth 313 has an inclined surface, and when the next pipe casting is performed, the mold cylinder 1 is only needed to be repositioned to the casting position, and then the uniform material cylinder 31 is repositioned to the casting position, when the uniform material cylinder 31 just extends into the mold cylinder 1, the circular arc convex part of the locking groove 314 extrudes the inclined surface of the locking tooth 313, so that the locking rod 312 moves downward, and the locking tooth 313 enters the locking groove 314, and the uniform material cylinder 31 continues to extend, so that the pulling plate 37 is pushed to the right to abut against the bottom end of the mold cylinder 1, at this time, the limiting block 38 on the pulling plate 37 is limited and clamped with the bottom end of the mold cylinder 1.

[0036] It should be noted that, as shown in Figure 3 The end plate 35 is fixedly arranged on the uniform material cylinder 31, when the uniform material cylinder 31 is in the uniform material position, the end plate 35 frictionally abuts against the feeding end of the mold cylinder 1 to close the feeding end of the mold cylinder 1, so as to prevent the metal from splashing out of the mold cylinder 1.

[0037] With reference to the accompanying drawings being continued Figure 2 and Figure 11 The first linear displacement mechanism 2 comprises a fourth motor 21, a first sliding rail 22, a first screw rod 23 and a first sliding block 24, the output end of the fourth motor 21 is drivingly connected with the first screw rod 23, the two ends of the first screw rod 23 are rotatably connected on the first sliding rail 22, the first sliding block 24 is threadedly connected on the first screw rod 23, and the first sliding block 24 is slidingly connected with the first sliding rail 22, the first sliding seat 25 is fixedly arranged on the first sliding block 24, the second linear displacement mechanism 5 comprises a fifth motor 51, a second sliding rail 52, a second screw rod 53 and a second sliding block 54, the output end of the fifth motor 51 is drivingly connected with the second screw rod 53, the two ends of the second screw rod 53 are rotatably connected on the second sliding rail 52, the second sliding block 54 is threadedly connected on the second screw rod 53, and the second sliding block 54 is slidingly connected with the second sliding rail 52, the second sliding seat 55 is fixedly arranged on the second sliding block 54.

[0038] It should be noted that, when the ductile cast iron casting device is in use, the lifting assembly 6 is located at the initial position, at this time, the first sliding seat 25 drives the mold cylinder 1 to move left to the casting position under the driving of the first linear displacement mechanism 2, then the second sliding seat 55 drives the material distributing cylinder 31 and the liquid injection pipe 42 to move right to the casting position under the driving of the second linear displacement mechanism 5, in the process of moving right of the material distributing cylinder 31, the arc convex part of the lock groove 314 first extrudes the inclined surface of the lock tooth 313, so that the lock rod 312 moves downward, until the lock tooth 313 enters into the lock groove 314, the material distributing cylinder 31 continues to extend, and then the material pulling plate 37 is pushed right to the abutting position between the material pulling plate 37 and the bottom end of the mold cylinder 1, at this time, the limiting block 38 on the material pulling plate 37 is limitedly connected with the bottom end of the mold cylinder 1, and the end plate 35 abuts with the feeding end surface of the mold cylinder 1; Start the first motor 13 to drive the mold cylinder 1 to rotate, and start the second motor 32 to drive the material distributing cylinder 31 to rotate, at this time, the rotating directions of the material distributing cylinder 31 and the mold cylinder 1 are same, and the rotating speed of the material distributing cylinder 31 is greater than that of the mold cylinder 1, then pour the metal liquid into the rotating injection groove 41, at this time, the sealing plates 48 on both sides of the liquid injection opening 422 are located at the initial position, i.e. the liquid injection opening 422 is in the open state, the metal liquid is injected into the material distributing cylinder 31 through the liquid injection pipe 42 and the liquid injection opening 422, and is evenly spread on the inner wall of the mold cylinder 1 through the material distributing holes 36 on the material distributing cylinder 31; After the metal solution required for pipe fitting casting is injected, the third motor 43 is driven, under the meshing transmission of the third driving gear 44 and the third driven gear 45, the main shaft 46 drives the sealing plates 48 to swing through the swing arms 47, so that the pair of sealing plates 48 are close to each other, as Figure 8As shown, the sealing plate 48 drives the clamping plate 410 to make the clamping groove 411 clamped with the side baffle 49, so as to form a receiving area between the sealing plate 48 and the side baffle 49, so that the residual metal liquid in the liquid injection pipe 42 is gathered into the receiving area below the liquid injection port 422; After the casting is finished, the mold cylinder 1 and the homogenizing cylinder 31 stop rotating, and the pressing block 39 is located at a position above the radial direction of the pulling plate 37, at this time, the first linear displacement mechanism 2 drives the first sliding block 25 to move the mold cylinder 1 to the right, and the homogenizing cylinder 31 pulls the pulling plate 37 through the lock teeth 313, so that the pipe is limited on the left side of the pulling plate 37, so that the pipe is pulled out of the mold cylinder 1, and in the process of being pulled out, the pipe is gradually not supported by the mold cylinder 1, therefore, the lifting assembly 6 needs to be used for auxiliary support; When the mold cylinder 1 moves to the right to the discharging position, the pipe is completely supported by the lifting assembly 6, at this time, the driving part of the lifting assembly 6 drives the lifting part to move downward, so that the pipe moves downward synchronously to the inner wall of the pipe abutting the pressing block 39, the guide rod 310 drives the lock rod 312 to move downward, so that the lock teeth 313 exit the lock groove 314, at this time, under the driving of the second linear displacement mechanism 5, the second sliding block 55 drives the homogenizing cylinder 31 and the liquid injection pipe 42 to move to the left and exit to the outside of the pipe, and the pulling plate 37 still stays in the mold cylinder 1; then the pipe can be taken away by the mechanical hand, and the taking process is not interfered by the homogenizing cylinder 31 and the mold cylinder 1; The above-mentioned actions can be repeated to realize the centrifugal casting of the pipe in batches.

[0039] The above-mentioned embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A casting apparatus for ductile iron castings, characterized in that, include: The centrifugal casting mechanism includes a mold cylinder (1) and a centrifugal drive assembly. The output end of the centrifugal drive assembly is connected to the mold cylinder (1) for transmission. The centrifugal drive assembly is used to drive the mold cylinder (1) to rotate. The cylinder axis of the mold cylinder (1) is set horizontally. The material leveling mechanism (3) includes a material leveling cylinder (31) and a material leveling drive assembly. The output end of the material leveling drive assembly is connected to the material leveling cylinder (31) for transmission. The material leveling drive assembly is used to drive the material leveling cylinder (31) to rotate. The material leveling cylinder (31) has multiple material leveling holes (36) on its cylinder wall. In the liquid injection state, the material leveling cylinder (31) is located in the mold cylinder (1) and is coaxially arranged with the mold cylinder (1). The rotation direction of the material leveling cylinder (31) is the same as the rotation direction of the mold cylinder (1). Under the drive of the material leveling drive assembly, the rotation speed of the material leveling cylinder (31) is greater than the rotation speed of the mold cylinder (1). The liquid injection mechanism (4) is set in the uniform material cylinder (31). The liquid injection mechanism (4) is used to transport the molten liquid into the uniform material cylinder (31). The liquid injection mechanism (4) includes a liquid injection tube (42), which extends into the uniform material cylinder (31). The side of the liquid injection tube (42) is provided with a liquid injection port (422), and a sealing component is provided on one side of the liquid injection port (422). The sealing component is used to seal the liquid injection port (422) after the liquid injection is completed. The sealing assembly includes a sealing drive assembly, a sealing plate (48), a snap-fit ​​plate (410), and a side baffle (49). The output end of the sealing drive assembly is connected to the sealing plate (48). The sealing plates (48) are arranged in pairs. Along the axial direction of the injection pipe (42), the paired sealing plates (48) are symmetrically arranged on both sides of the injection port (422). Along the axial direction of the injection pipe (42), the two ends of the injection port (422) are respectively fixedly connected to the side baffle (49). The two ends of the sealing plate (48) are respectively fixedly provided with the snap-fit ​​plate (410). The snap-fit ​​plate (410) is provided with a snap-fit ​​groove (411). The snap-fit ​​groove (411) is correspondingly provided with the side baffle (49). When the sealing plate (48) is in the initial position, the injection port (422) is opened, and the snap-fit ​​plate (410) and the side baffle (49) are spaced apart; when the sealing plate (48) is in the sealed position, the snap-fit ​​plate (410) is sealed and abutted against the side baffle (49) through the snap-fit ​​groove (411), and a storage area is formed between the side baffle (49) and the sealing plate (48).

2. The casting apparatus for ductile iron castings according to claim 1, characterized in that, The centrifugal drive assembly includes a first driving gear (12), a first driven gear (11), a first motor (13), a support wheel (15), and a limiting roller (16). The output end of the first motor (13) is connected to the first driving gear (12), and the first driving gear (12) meshes with the first driven gear (11). The first driven gear (11) is fixedly disposed on the outer periphery of the mold cylinder (1). The outer periphery of the mold cylinder (1) is also fixedly disposed on the support wheel (15), and the support wheel (15) is tactilely connected to the limiting roller (16).

3. The casting apparatus for ductile iron castings according to claim 2, characterized in that, The material leveling drive assembly includes a second motor (32), a second drive gear (33), and a second driven gear (34). The output end of the second motor (32) is connected to the second drive gear (33), and the second drive gear (33) meshes with the second driven gear (34). The second driven gear (34) is fixedly mounted on the material leveling cylinder (31), and the material leveling cylinder (31) is rotatably mounted on the second slide (55).

4. The casting apparatus for ductile iron castings according to claim 3, characterized in that, The sealing drive assembly includes a third motor (43), a third drive gear (44), a third driven gear (45), and a main shaft (46). The output end of the third motor (43) is connected to the third drive gear (44). The third driven gears (45) are arranged in pairs and mesh with each other. The third drive gear (44) meshes with one of the third driven gears (45). The third driven gear (45) is fixedly mounted on the corresponding main shaft (46). A swing arm (47) is fixedly connected to the main shaft (46). The end of the swing arm (47) away from the main shaft (46) is fixedly connected to the sealing plate (48). The third motor (43) and the third drive gear (44) are respectively mounted on the second slide (55).

5. The casting apparatus for ductile iron castings according to claim 4, characterized in that, The sealing plate (48) is embedded with a heating element (481), which is used to heat and keep the molten metal in the storage area. The heating element (481) is electrically connected to the temperature control element (482).

6. The casting apparatus for ductile iron castings according to claim 5, characterized in that, The limiting roller (16) and the first motor (13) are respectively mounted on the first slide (25), the second motor (32) and the second drive gear (33) are mounted on the second slide (55), the first slide (25) is located at the output end of the first linear shifting mechanism (2), the first linear shifting mechanism (2) is used to drive the first slide (25) to reciprocate along the axial direction of the uniform material cylinder (31), the second slide (55) is located at the output end of the second linear shifting mechanism (5), the second linear shifting mechanism (5) is used to drive the second slide (55) to reciprocate along the axial direction of the mold cylinder (1); The mold cylinder (1) is also provided with a pull plate (37), and the circumferential sidewall of the pull plate (37) is in contact with the circumferential inner wall of the mold cylinder (1). A limit block (38) is provided on the side of the pull plate (37) away from the feed end of the mold cylinder (1). The limit block (38) is engaged with the bottom end of the mold cylinder (1). A guide rod (310) is slidably installed inside the pull plate (37). The outer end of the guide rod (310) is fixedly connected to a pressure rod. Block (39), the inner end of the guide rod (310) is fixedly connected to the locking rod (312), and the end of the guide rod (310) near the locking rod (312) is sleeved with a spring (311). The locking rod (312) is located outside the material pulling plate (37) and has locking teeth (313). The shaft end of the material equalizing cylinder (31) is provided with a locking groove (314). The locking teeth (313) are connected to the material equalizing cylinder (31) through the locking groove (314). Among them, a lifting assembly (6) is provided below the mold cylinder (1). When the first linear shifting mechanism (2) drives the first slide (25) to move the mold cylinder (1) away from the uniform material cylinder (31) to the unloading position, the lifting part of the lifting assembly (6) lifts the centrifugally cast pipe; and under the drive of the driving part of the lifting assembly (6), the lifting part lifts the pipe and moves it down to press the pipe down on the pressure block (39) until the locking tooth (313) exits the locking groove (314).

7. The casting apparatus for ductile iron castings according to claim 6, characterized in that, The first linear displacement mechanism (2) includes a fourth motor (21), a first slide rail (22), a first lead screw (23), and a first slider (24). The output end of the fourth motor (21) is connected to the first lead screw (23). The two ends of the first lead screw (23) are rotatably connected to the first slide rail (22). The first slider (24) is threadedly connected to the first lead screw (23) and slidably connected to the first slide rail (22). The first slide block (25) is fixedly mounted on the first slider (24). The second linear shifting mechanism (5) includes a fifth motor (51), a second slide rail (52), a second lead screw (53), and a second slider (54). The output end of the fifth motor (51) is connected to the second lead screw (53). The two ends of the second lead screw (53) are rotatably connected to the second slide rail (52). The second slider (54) is threadedly connected to the second lead screw (53) and is slidably connected to the second slide rail (52). The second slide block (55) is fixedly mounted on the second slider (54).

8. The casting apparatus for ductile iron castings according to claim 1, characterized in that, An end plate (35) is fixedly provided on the material equalization cylinder (31). When the material equalization cylinder (31) is in the material equalization position, the end plate (35) rubs against the feeding end of the mold cylinder (1).

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