Lost foam casting positioning assembly and intelligent casting pouring device and method

Abstract

The present application relates to the technical field of casting, in particular to a lost foam casting positioning assembly, an intelligent casting pouring device and a method, aiming at solving the problems of model inclination during jarring, large molten iron impact force during pouring and incomplete filling of the model cavity in the prior art, the device comprising a casting sand box and a sealing cover plate, the casting sand box being provided with a positioning mechanism and a limiting mechanism, the positioning mechanism fixing the forming mold on the bottom mold sand through multiple transmission screws and pin rods II, the limiting mechanism locking the forming mold and the casting sand box from both sides through pin rods I and hexagonal nuts, the pin rods I and II being made of bismuth-tin eutectic alloy, providing rigid support during jarring and melting and merging into molten iron during pouring, the device further comprising a vibrating mechanism, transmitting vibration to the dead corner area in the forming mold cavity through a tone arm rod, and the pouring mechanism being provided with a sealing plug made of high-temperature-resistant low-density material in the pouring cup, capable of blocking the initial impact of the falling molten iron.

Description

Technical Field

[0001] This invention relates to the field of casting technology, and in particular to a positioning component for lost foam casting and an intelligent casting device and method. Background Technology

[0002] Lost foam casting is an advanced casting process that uses a vaporized mold as a casting template for precision forming. Its core involves assembling a polystyrene foam model with a gating system into a model cluster, embedding it in binder-free dry sand, compacting it, and then pouring the molten metal under vacuum. This causes the model to vaporize, allowing the molten metal to occupy its space, ultimately forming the casting. This process offers advantages such as high dimensional accuracy, good surface quality, short production cycle, and low environmental pollution, and has been widely used in the mass production of complex precision castings.

[0003] In the molding process of lost foam casting, accurately and securely fixing the molding mold inside the sand box is a crucial step in ensuring the final dimensional accuracy of the casting. The commonly used method in current technology is to bury the molding mold in dry sand, then rely on the vibration generated by an external vibrating table to compact the sand, using the friction between sand particles and the negative pressure created by vacuuming to fix the molding mold in place.

[0004] For molds with complex geometries, especially when there are deep holes, blind holes, or complex cavities inside the mold, the vibration energy of the external vibratory compaction table is difficult to effectively transfer to the dry sand in these areas, resulting in insufficient compaction of the dry sand in some areas. During the strong vibration compaction process, the mold is subjected to huge buoyancy generated by the fluidized dry sand, which makes it very easy to float, shift, or tilt. Even under negative pressure conditions, this initial positional deviation is difficult to completely correct, ultimately leading to dimensional deviations, uneven wall thickness, or even scrapping of the casting. During the pouring process, the huge impact kinetic energy generated when the high-temperature molten metal falls from a height will directly impact the surface of the forming mold located below the pouring cup, which can easily cause local cracking or overall displacement of the forming mold, leading to backflow, box collapse, or sand erosion defects on the surface of the casting. In existing technologies, methods such as adding positioning ribs, increasing the compactness of sand molds, or optimizing the structure of the gating system are often used to address the problems of mold positioning and casting impact. However, these methods often increase the complexity of the process or have limited effectiveness for castings with specific structures, making it difficult to fundamentally solve the two major technical challenges of mold stability during the compaction stage and smoothness of the casting process at the same time. Summary of the Invention

[0005] This invention addresses the industry pain points of lost foam casting, such as easy model deviation during vibration, large impact force of molten iron during pouring, and incomplete filling of the model cavity. It has carried out targeted research and development and proposed a bismuth-tin eutectic alloy double pin positioning component, a tuning fork rod targeted high-frequency micro-amplitude vibration mechanism, and a floating sealing plug and spiral feeding plate pouring mechanism. Through rigid positioning, melt-into-molten metal, dead-angle targeting + impact buffering technical solutions, the invention proposes a lost foam casting positioning component and intelligent casting and pouring device and method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: Positioning components for lost foam casting, including: Sand casting box; A sealing cover plate is used to close the casting sand box; Bottom molding sand is placed on the bottom inner wall of the casting sand box; Two molding dies are placed on top of the bottom molding sand; Two sets of positioning mechanisms are installed on the bottom inner wall of the casting sand box to position the two forming molds; as well as, A limiting mechanism is used to limit the two forming molds to prevent the forming molds from shaking when the casting sand box vibrates.

[0007] In one possible design, the positioning mechanism includes multiple drive screws and multiple pins II. The multiple drive screws are threaded to the bottom inner wall of the casting sand box and arranged in a ring. The pins II are fixed to the top of the drive screws. The top of the pins II penetrates the bottom sand and extends into the forming mold to provide rigid support during vibration to prevent the forming mold from shifting.

[0008] In one possible design, the limiting mechanism includes multiple pins I and multiple hexagonal nuts. The multiple pins I slide through the casting sand box and through the two forming molds. The outer wall of each pin I has two threaded sections near both ends. The two hexagonal nuts are threaded to the pins I through the threaded sections, and the sides of the two hexagonal nuts that are close to each other abut against the two sides of the casting sand box, for fixing the pins I and further fixing the forming molds.

[0009] In one possible design, both ends of pin I and the top of pin II are provided with integrally formed conical heads; pin I and pin II are both made of bismuth-tin eutectic alloy, which has a melting point of 138°C, provides rigid support during vibration, and melts and is incorporated into the molten iron as an alloy component during high-temperature casting.

[0010] The intelligent casting and pouring device includes the above-mentioned lost foam casting casting positioning component, and also includes a vibrating table. The casting sand box is fixed on the top of the vibrating table, and the vibrating table is used to compact the sand in the casting sand box. A vibration mechanism, installed inside the vibration table, is used to compact the sand in the dead corner area near the molding die in the casting sand box. The vibration mechanism includes multiple tuning fork rods and multiple rubber sealing plugs. as well as, A casting mechanism is used to prevent the impact force of molten iron falling into the forming mold from breaking the forming mold when molten iron is poured into the forming mold. The casting mechanism includes a casting head tube and two feed tubes. The two feed tubes are fixedly connected and communicate with the bottom of the casting head tube, and are respectively located at the top of the two forming molds.

[0011] In one possible design, the vibration table includes a base, an upper top plate, multiple vibration dampers, and multiple vibration motors. The upper top plate is located above the base, the multiple vibration dampers are fixed between the upper top plate and the base, and the multiple vibration motors are fixed to the bottom of the upper top plate for driving the upper top plate to vibrate the casting sand box. The vibration mechanism further includes a U-shaped plate, two rotating shafts, two turntables, a drive motor, an electromagnetic clutch, a lifting platform, and a lead screw. The U-shaped plate is fixed to the bottom of the upper top plate. The two rotating shafts are rotatably connected to the bottom of the upper top plate. The two turntables are respectively fixedly sleeved on the outer walls of the two rotating shafts. Multiple arc-shaped plates II are fixed to the outer walls of the turntables. The tops of multiple tuning fork rods slide through the upper top plate. Multiple rubber sealing plugs are fixedly inserted through the bottom inner wall of the casting sand box. The tops of the tuning fork rods slide through the rubber sealing plugs. The tops of the tuning fork rods are located below the forming mold. The drive motor is fixed to the bottom of the U-shaped plate. The electromagnetic clutch is fixed to the bottom inner wall of the U-shaped plate. The output shaft of the drive motor is fixedly connected to the input shaft of the electromagnetic clutch. The main shaft is fixedly connected to the bottom end of one of the rotating shafts, used to drive the turntable and the arc plate II to rotate and strike the tuning fork. The lifting platform is slidably connected inside the U-shaped plate. The bottom ends of the two rotating shafts pass through the lifting platform. The lead screw is rotatably connected to the bottom inner wall of the U-shaped plate and threaded through the lifting platform. The output shaft of the electromagnetic clutch is driven by the lead screw, used to drive the lead screw to rotate and drive the lifting platform and the tuning fork to rise and fall. The two rotating shafts are connected by synchronous pulleys III and IV through a first synchronous belt. The output shaft of the electromagnetic clutch is connected to the lead screw through synchronous pulleys I, II and a second synchronous belt. The top of the lifting platform is fixed with multiple vertical rods, and the vertical rods are fixedly connected to the corresponding tuning fork rods through connecting plates.

[0012] In one possible design, the casting mechanism further includes a sprue I, a sprue II, a pouring cup, and a sealing plug. The sprue I is fixedly connected to and communicates with the top of the casting head tube, and the top end of the sprue I passes through the sealing cover plate. The bottom end of the sprue II is connected to the top end of the sprue I. The pouring cup is fixed to the top end of the sprue II and has multiple sliding rods I on the inner wall of the bottom of the pouring cup. The sealing plug is slidably sleeved on multiple sliding rods I to seal the sprue II. An arc-shaped plate I is fixed to the top of the sealing plug. Both the sealing plug and the arc-shaped plate I are made of high-temperature resistant, low-density hollow foamed ceramic with a density less than that of molten iron. During pouring, molten iron falls onto the arc-shaped plate I. As the molten iron level rises, the sealing plug and the arc-shaped plate I automatically float up to allow the pouring pipe II to flow in smoothly.

[0013] In one possible design, both the gating pipe II and the gating pipe I are fixed with spiral feed plates. The two spiral feed plates cooperate to guide the molten iron to swirl downwards to consume its vertical kinetic energy.

[0014] In one possible design, the vibration table further includes a vacuum pump and a controller. The vacuum pump is fixed to the top of the upper plate, and the air inlet of the vacuum pump is connected to the interior of the casting sand box through a pipe to evacuate the interior of the casting sand box to a vacuum after vibration. The controller is electrically connected to the vacuum pump, the electromagnetic clutch, and the drive motor.

[0015] 1. Bismuth-tin eutectic alloy pins I and II are used to achieve dual rigid positioning, providing rigid support during vibration, and melting into molten iron during casting, leaving no residual pores; 2. Equipped with a tuning fork rod targeting high-frequency micro-vibration mechanism, it can penetrate deep into the dead corner area of ​​the molding die to vibrate and solve the problem of incomplete filling; 3. It is equipped with a floating sealing plug and a spiral feeding plate pouring mechanism, which can buffer the impact of molten iron and achieve stable pouring.

[0016] The method of using the intelligent casting and pouring device includes the following steps: S1. Fix the casting sand box on the top plate, screw the transmission screw into the bottom of the casting sand box to keep pin II vertical, and lay bottom sand at the bottom of the casting sand box until the cone head protrudes from the sand surface; hoist the two forming molds into the casting sand box, insert pin II into the positioning hole at the bottom of the forming mold, and place the two forming molds side by side on the top of the bottom sand. S2. Insert pin I into one side wall of the casting sand box, pass through two forming molds in sequence, and then exit from the other side wall. Put hexagonal nuts on both ends of pin I and tighten them along the thread section until they abut against the outer wall of the casting sand box, so that pin I is tensioned and passes through and clamps the two forming molds. S3. Fill the casting sand box with dry sand until it submerges the molding mold, cover it with plastic film, and then put on the sealing cover and lock it. Start the vibration motor to drive the top plate to vibrate the casting sand box, so that the dry sand is compacted. S4. Start the drive motor and drive the rotating shaft to rotate through the electromagnetic clutch. The rotating shaft drives another rotating shaft to rotate synchronously through synchronous pulley III, synchronous pulley IV, and the first synchronous belt. The arc plate II on the turntable rotates with the turntable and collides with the bottom of the tuning fork rod. S5. The tuning fork rod generates high-frequency micro-amplitude vibrations when it is struck, which are transmitted through the tip and rubber sealing plug to the dead corner area of ​​the molding mold inside the casting sand box, causing the dry sand to fluidize and fill the fine structure. S6. The electromagnetic clutch switches states to make the output shafts rotate simultaneously. Through the second synchronous belt of synchronous pulley I and synchronous pulley II, the screw is driven to rotate, which drives the lifting platform to move downward along slide bar II. Through the vertical rod and connecting plate, all tuning fork rods are pulled out synchronously downward. During the pulling process, the tuning fork rods maintain high-frequency micro-amplitude vibration. S7. After the tip of the tuning fork rod exits the rubber sealing plug, the rubber sealing plug automatically closes and seals; the vacuum pump is started to extract air from the casting sand box to the set vacuum level, so that the dry sand forms a sand mold; S8. Pour the molten iron into the pouring cup. After the molten iron impacts the arc plate I, it flows in. The sealing plug and the arc plate I float up along the slide rod I under the buoyancy of the molten iron, opening the entrance of the pouring pipe II. The molten iron flows downward spirally through the spiral feeding plate in the pouring pipe II and the pouring pipe I. S9. After the molten iron flows through the pouring head pipe, it is injected into the top of the forming mold through the feed pipe. The forming mold is vaporized, and pins I and II melt and merge into the molten iron after contact with it. After the casting solidifies and cools, the vacuum is released, the sealing cover is opened, and the sand box is removed for cleaning.

[0017] Beneficial effects: In this invention, through the cooperation of the transmission screw and pin II in the positioning mechanism, pin II is fixed at the bottom of the sand box before the bottom molding sand is laid. After the bottom molding sand is laid, pin II is directly inserted into the bottom when the molding mold is placed, which realizes the accurate initial positioning of the molding mold in the horizontal direction. The operation is convenient. Furthermore, pin I in the limiting mechanism passes through the entire casting sand box and molding mold, and the two ends of pin I are locked to the two side walls of the sand box by using hexagonal nuts, which provides additional support for the molding mold in the direction perpendicular to pin II, forming a double constraint system in space. This effectively suppresses the shaking and tilting of the molding mold during the vibration process and ensures its positional accuracy in the compaction process. In this invention, both pin I and pin II are made of bismuth-tin eutectic alloy with a melting point of 138°C. During the sand mold compaction stage at room temperature, the pin provides a purely mechanical rigid support for the forming mold. When the molten iron is poured at high temperature, the pin is physically melted by the molten iron and is incorporated into the molten iron as an alloy component. This process leaves no holes or defects on the casting, solving the problem that traditional positioning pins need to be drilled or pitted on the casting, simplifying subsequent processing procedures and ensuring the integrity of the casting. In this invention, by cooperating with the drive motor and the electromagnetic clutch, the tuning fork rod can be independently driven to generate high-frequency micro-amplitude vibration. This vibration directly acts on the dry sand dead zone area around the forming mold and the complex internal cavity. This process combines macroscopic overall vibration with microscopic local high-frequency vibration, which improves the filling and compaction effect of dry sand in the sand box, ensures uniform support of the sand mold for the forming mold, and lays the foundation for obtaining high-quality castings. In this invention, through the linkage between the output shaft of the electromagnetic clutch and the lead screw, after the vibration compaction operation is completed, the lifting platform can be driven to smoothly pull the tuning fork rod out of the casting sand box. At the same time as it is pulled out, the arc plate II continuously strikes the tuning fork rod to keep it vibrating. This "vibrating while pulling out" operation method effectively prevents the tuning fork rod from disturbing or collapsing the already compacted dry sand layer during the disengagement process, thus maintaining the structural integrity of the sand mold. In this invention, the sealing plug and arc plate I set inside the pouring cup in the pouring mechanism are made of high-temperature resistant, low-density hollow foamed ceramic, which has a density less than that of molten iron. When molten iron is poured into the pouring cup, it first impacts the arc plate I, and the kinetic energy is initially dispersed. As the liquid level rises, the sealing plug and arc plate I automatically float up under the action of buoyancy, so that the inlet of the pouring pipe II opens smoothly, transforming the traditional impact jet into a stable bottom pouring flow, avoiding the direct impact of high-speed molten iron on and damage to the molding mold. In this invention, the spiral feeding plates installed inside the sprue I and sprue II force the molten iron to swirl down the spiral steps as it flows through. This structure utilizes centrifugal friction and step obstruction to further consume the vertical falling kinetic energy of the molten iron, converting it into a stable rotating flow. This allows the molten iron to smoothly contact and vaporize into the forming mold, minimizing the impact risk to the mold during the casting process.

[0018] In this invention, the synergistic action of the positioning mechanism and the limiting mechanism provides rigid and meltable dual positioning and fixation for the molding mold, effectively preventing model displacement during vibration and pouring. The directional high-frequency micro-amplitude vibration of the tuning fork rod in the vibration mechanism solves the problem of dead corners in the dry sand compaction in the sand box, improving the overall strength and support uniformity of the sand mold. The sealing plug and spiral feeding plate in the pouring mechanism gradually consume the high-level impact kinetic energy of the molten metal, converting it into a stable bottom pouring flow, avoiding damage to the model from the pouring impact. The entire device forms a complete and efficient process flow from model positioning and sand mold compaction to molten metal pouring, improving the stability of the casting process and the quality of the castings. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the positioning component for lost foam casting provided by the present invention; Figure 2 This is a three-dimensional exploded view of the positioning component for lost foam casting provided by the present invention; Figure 3 This is a three-dimensional cross-sectional view of the positioning component for lost foam casting provided by the present invention. Figure 4 This is a three-dimensional structural diagram of the pin I and hexagonal nut of the lost foam casting positioning assembly provided by the present invention; Figure 5 This is a three-dimensional structural diagram of the pin II and the transmission screw of the lost foam casting positioning assembly provided by the present invention. Figure 6 This is a three-dimensional structural schematic diagram of the intelligent casting and pouring device provided by the present invention. Figure 7 This is a three-dimensional exploded structural diagram of the top plate and base of the intelligent casting and pouring device provided by the present invention; Figure 8 This is a three-dimensional exploded structural diagram of the gating pipe II and the pouring head pipe of the intelligent casting and pouring device provided by the present invention; Figure 9 This is a cross-sectional view of the pouring cup and pouring pipe II of the intelligent casting device provided by the present invention. Figure 10 This is a three-dimensional structural diagram of the U-shaped plate and lifting platform of the intelligent casting and pouring device provided by the present invention; Figure 11 This is a three-dimensional structural diagram of the turntable, arc plate II, and tuning fork rod of the intelligent casting device provided by the present invention.

[0020] In the diagram: 1. Casting sand box; 2. Bottom molding sand; 3. Sealing cover plate; 4. Molding mold; 5. Pin I; 6. Threaded section; 7. Hexagonal nut; 8. Pin II; 9. Drive screw; 10. Conical head; 11. Base; 12. Vibration damper; 13. Top plate; 14. Vibration motor; 15. Vacuum pump; 16. Casting head pipe; 17. Feed pipe; 18. Sprue I; 19. Sprue II; 20. Positioning ring; 21. Sprue cup; 22. Screw conveyor 23. Material plate; 24. Sealing plug; 25. Slide rod I; 26. Arc plate I; 27. U-shaped plate; 28. Rotating shaft; 29. ​​Turntable; 30. Arc plate II; 31. Lifting platform; 32. Drive motor; 33. Electromagnetic clutch; 34. Synchronous pulley I; 35. Synchronous pulley II; 36. Rubber sealing plug; 37. Vertical rod; 38. Connecting plate; 39. Lead screw; 40. Tuning fork rod; 41. Synchronous pulley III; 42. Synchronous pulley IV; 43. Slide rod II. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] In one embodiment: Refer to Figure 1 and Figure 2 The lost foam casting casting positioning component relates to the field of casting technology, including a casting sand box 1 and a sealing cover plate 3 for closing the casting sand box 1. The casting sand box 1 is provided with a bottom molding sand 2, which is laid on the bottom inner wall of the casting sand box 1. Two molding molds 4 are placed side by side on top of the bottom molding sand 2. The molding molds 4 are molding molds made of polystyrene foam plastic.

[0023] Reference Figures 1-5 In order to accurately and stably position the two forming molds 4 inside the casting sand box 1 during the vibration compaction process, this technical solution is equipped with a positioning mechanism and a limiting mechanism.

[0024] Reference Figure 3 and Figure 5The positioning mechanism is installed on the bottom inner wall of the casting sand box 1. The positioning mechanism includes multiple drive screws 9 and pins II 8 corresponding to each drive screw 9. Multiple threaded holes are pre-drilled on the bottom inner wall of the casting sand box 1. The distribution of these threaded holes corresponds to the positioning holes pre-drilled on the bottom of the forming mold 4, and the multiple threaded holes are arranged in a ring. During installation, the drive screws 9 are first screwed into the threaded holes at the bottom from inside the casting sand box 1, so that the threads of the drive screws 9 extend to the bottom inner wall of the casting sand box 1. The top of the drive screws 9 is provided with an annular sealing ring groove, and a sealing ring is embedded in the threaded hole. When the drive screws 9 are screwed into place, the sealing ring abuts against the end face of the countersunk hole to prevent dry sand from entering the thread gap. The pins II 8 are fixed to the top of the drive screws 9, and the top of the pins II 8 penetrates the bottom sand. 2. It extends into the molding mold 4 to provide vertical guidance and horizontal positioning for the molding mold 4 during vibration, so as to prevent its horizontal displacement. The friction between the bottom of the molding mold 4 and the bottom sand 2, as well as the negative pressure generated by subsequent vacuuming, jointly resist the vertical buoyancy generated during vibration. The top of the pin Ⅱ8 is provided with a conical head 10. The pin Ⅱ8 and the conical head 10 are integrally formed. When the transmission screw 9 is tightened, the top of the pin Ⅱ8 passes through the bottom sand 2 and extends into the interior of the molding mold 4. The design of the conical head 10 allows the pin Ⅱ8 to be easily inserted into the positioning hole of the molding mold 4, reducing the insertion resistance and avoiding damage to the molding mold. In this way, the positioning mechanism supports and radially positions the molding mold 4 from the bottom, preventing the molding mold 4 from shifting in the horizontal direction.

[0025] Reference Figure 1 , Figure 3 and Figure 4The limiting mechanism is used to clamp and limit the two forming molds 4 laterally from the horizontal direction. The limiting mechanism includes multiple pins I5 and hexagonal nuts 7 that mate with the pins I5. The pins I5 are horizontally arranged and slide through the side wall of the casting sand box 1 in a sealing manner. Each pin I5 slides through two forming molds 4 arranged side by side at the same time. The outer wall of the pin I5 is provided with two threaded sections 6, which are located near the two ends of the pin I5. The hexagonal nuts 7 are sleeved on the outer wall of the pins I5 and form a threaded connection with the pins I5 through the threaded sections 6. During installation, after the pin II8 of the positioning mechanism is inserted into the bottom of the forming mold 4, the pins I5 are pulled out of the casting sand box 1. The pin 1 is inserted horizontally on one side, passing through the side wall of the casting sand box 1, the first molding mold 4, the second molding mold 4, and the other side wall of the casting sand box 1 in sequence. A hexagonal nut 7 is screwed into each end of the pin 15. The hexagonal nuts 7 are rotated so that the sides that are close to each other are tightly abutted against the outer walls of the two sides of the casting sand box 1. During this process, the tightening torque should be controlled so that the pin 15 is gently fixed on the casting sand box 1. The pin 15 restricts the relative displacement and rotation of the two molding molds 4 in the horizontal direction, thereby avoiding the squeezing damage to the molding molds 4 due to excessive tension, and effectively preventing the molding molds 4 from tilting or relative displacement during subsequent vibration.

[0026] Reference Figures 1-5 In this specific embodiment, pins I5 and II8 are both made of bismuth-tin eutectic alloy, which has a melting point of 138 degrees Celsius. During the molding and compaction stages, the ambient temperature is much lower than this melting point, so pins I5 and II8 remain solid, providing purely mechanical rigid support and positioning for the forming mold 4. This effectively resists the buoyancy generated by the fluidization of dry sand and prevents the forming mold 4 from shifting. When the molten iron is poured at high temperature, the temperature reaches 1400 to 1600 degrees Celsius, which is much higher than the melting point of the bismuth-tin eutectic alloy. Pins I5 and II8 are physically melted the moment they come into contact with the molten iron. Furthermore, bismuth and tin, as alloying elements, can be directly incorporated into the molten iron and become part of the casting material. Therefore, no holes or inclusions are left after the casting solidifies.

[0027] Reference Figure 4 To further improve the smoothness of insertion, both ends of the pin I5 are also provided with conical heads 10 integrally formed with the pin I5, so that the pin I5 can easily enter the preset channel when passing through the forming mold 4.

[0028] Reference Figure 6 The intelligent casting and pouring device includes the aforementioned lost foam casting casting positioning component, and further integrates a vibration table and a pouring mechanism.

[0029] Reference Figure 6 and Figure 7The vibrating table is used to compact the dry sand in the casting sand box 1. The vibrating table includes a base 11, an upper top plate 13, and multiple vibration dampers 12. The vibration dampers 12 are fixedly connected between the upper top plate 13 and the base 11 to isolate vibration and reduce the impact on the ground. The casting sand box 1 is fixed to the top of the upper top plate 13 by bolts. Multiple vibration motors 14 are fixed to the bottom of the upper top plate 13. The vibration motors 14 are the power source of the vibrating table. When the vibration motors 14 are started, they drive the upper top plate 13 to drive the casting sand box 1 to vibrate at high frequency, so that the dry sand inside the casting sand box 1 gradually compacts under the action of vibration. A vacuum pump 15 is also fixed to the top of the upper top plate 13. The air inlet of the vacuum pump 15 is connected to the inside of the casting sand box 1 through a pipe. It is used to draw the inside of the casting sand box 1 to a vacuum state after the compaction process is completed, so that the dry sand is further solidified under negative pressure to form a sand mold with a certain strength.

[0030] Reference Figure 7 and Figure 10 Because the molding mold 4 has a complex cavity structure, it is difficult to achieve the ideal compaction of dry sand in the cavity and surrounding dead corner areas by relying solely on the overall vibration of the vibration table. Therefore, this technical solution integrates a vibration mechanism on the vibration table to perform targeted vibration on these dead corner areas.

[0031] Reference Figure 7 and Figure 10The vibration mechanism includes multiple tuning fork rods 39, multiple rubber sealing plugs 35, a U-shaped plate 26, a rotating shaft 27, a turntable 28, an arc plate II 29, a lifting platform 30, a drive motor 31, an electromagnetic clutch 32, and a lead screw 38. The rubber sealing plugs 35 are fixedly inserted through the bottom inner wall of the casting sand box 1. There are at least four rubber sealing plugs 35. The top of the tuning fork rod 39 slides through the rubber sealing plug 35. The rubber sealing plug 35 is configured as a double-layer elastic sealing structure, with an inner layer of wear-resistant silicone sealing core and an outer layer of fluororubber sealing sleeve. An annular sealing groove is provided at the mating point between the rubber sealing plug 35 and the bottom inner wall of the casting sand box 1, and the sealing groove is embedded within... An O-ring is inserted; the mating surfaces of the tuning fork rod 39 and the rubber sealing plug 35 are polished, and a dustproof flange is provided at the sealing opening of the rubber sealing plug 35 to prevent molding sand from entering the sealing mating surface. The top of the tuning fork rod 39 can extend upward to the area below the molding mold 4, or the height of the tuning fork rod 39 can be adjusted according to the position of the dead corner so that its tip is close to the area that needs to be focused on compaction. The bottom of the tuning fork rod 39 slides through the upper top plate 13 and extends to the area below the upper top plate 13. The rubber sealing plug 35, while ensuring that the tuning fork rod 39 can slide up and down, also plays a sealing role to prevent air leakage from the casting sand box 1 during vacuuming. Multiple sealing sleeves are fixed at the bottom of the casting sand box 1. The top of the tuning fork rod 39 slides through the sealing sleeve. The inner wall of the sealing sleeve is provided with a sealing ring to provide a sliding seal when the tuning fork rod 39 is inserted. The tuning fork rod 39 has a shoulder on its shaft that mates with the sealing sleeve. When the tuning fork rod 39 is pushed upward to the working position, the shoulder abuts against the end face of the sealing sleeve to form a limit and auxiliary seal. When the tuning fork rod 39 is pulled downward, the shaft of the tuning fork rod 39 disengages from the sealing ring. The shoulder only mates with the sealing sleeve again in the final stage of pulling out, so as to reduce the frictional resistance during the entire pulling process.

[0032] Reference Figure 7 , Figure 10 and Figure 11The U-shaped plate 26 is fixed to the bottom of the upper top plate 13. Two rotating shafts 27 are rotatably connected to the bottom of the upper top plate 13, and the bottom ends of the two rotating shafts 27 extend downward into the interior of the U-shaped plate 26. A turntable 28 is fixedly fitted on the outer wall of each rotating shaft 27. Multiple arc-shaped plates II 29 are fixed on the outer wall of the turntable 28. The position and number of arc-shaped plates II 29 correspond to the position and number of tuning fork rods 39. When the turntable 28 rotates, the arc-shaped plates II 29 can collide with the bottom ends of the tuning fork rods 39 in sequence. The drive motor 31 is fixed to the U-shaped plate 26 through the frame. The electromagnetic clutch 32 is fixed to the bottom inner wall of the U-shaped plate 26 by a frame. The output shaft of the drive motor 31 is fixedly connected to the input shaft of the electromagnetic clutch 32. The electromagnetic clutch 32 has an output main shaft and an output branch shaft. The output main shaft is fixedly connected to the bottom end of one of the rotating shafts 27 to drive the rotating shaft 27 to rotate. The two rotating shafts 27 are connected by synchronous pulley III 40, synchronous pulley IV 41 and the first synchronous belt. Therefore, when one rotating shaft 27 is driven, the other rotating shaft 27 also rotates synchronously.

[0033] Reference Figure 7 , Figure 10 and Figure 11 The lead screw 38 is rotatably connected to the bottom inner wall of the U-shaped plate 26, and the lifting platform 30 is slidably connected to the inside of the U-shaped plate 26. The top end of the lead screw 38 is threaded through the lifting platform 30. Multiple slide rods II 42 are also fixed to the bottom inner wall of the U-shaped plate 26. The top end of the slide rods II 42 slides through the lifting platform 30 to guide the lifting movement of the lifting platform 30 and prevent it from rotating. The bottom ends of multiple vertical rods 36 are fixed to the top of the lifting platform 30, and the top ends of the vertical rods 36 are fixed to the connecting plate 37. The connecting plate 37 is fixed to the outer wall of the corresponding tuning fork rod 39. Through this connection method, the up and down movement of the lifting platform 30 can drive all the tuning fork rods 39 to move up and down synchronously. The output shaft of the electromagnetic clutch 32 is connected to the lead screw 38 through the synchronous pulley I 33, the synchronous pulley II 34 and the second synchronous belt. The synchronous pulley I 33 is fixed on the output shaft of the electromagnetic clutch 32, and the synchronous pulley II 34 is fixed on the outer wall of the lead screw 38.

[0034] Specifically, when it is necessary to perform targeted vibration on the dry sand in the dead corner of the casting sand box 1, the drive motor 31 starts, and the electromagnetic clutch 32 first controls its output main shaft to rotate, while the output sub-shaft does not rotate. At this time, the power is transmitted to the rotating shaft 27 through the output main shaft, which drives the turntable 28 and the arc plate II 29 to rotate. During the rotation, the arc plate II 29 continuously strikes the bottom end of the tuning fork rod 39, causing the tuning fork rod 39 to generate high-frequency micro-amplitude vibration. This vibration is transmitted through the tip of the tuning fork rod 39 to the dry sand in the dead corner area of ​​the casting sand box 1 near the forming mold 4, causing the dry sand in this area to become fluidized instantly, thereby filling the previously unfillable blind areas and dead corners, achieving local targeted compaction. The bottom inner wall of the U-shaped plate 26 is fixed with a dust cover, which completely covers the lead screw 38, the synchronous wheel II 34, and the mating part of the lifting platform 30 with the lead screw 38 to prevent external dust from entering. After the compaction process is completed, the tuning fork 39 needs to be removed from the sand box before pouring to avoid affecting the casting or causing negative pressure leakage during the pouring process. At this time, the electromagnetic clutch 32 controls its output main shaft and output sub-shaft to rotate simultaneously. The output main shaft continues to drive the turntable 28 to rotate, so that the arc plate II 29 continues to strike the tuning fork 39, keeping the tuning fork 39 in a high-frequency micro-amplitude vibration state. At the same time, the output sub-shaft drives the lead screw 38 to rotate through the synchronous pulley and synchronous belt. The rotation of the lead screw 38 drives the lifting platform 30 along the slide rod II. 42 moves downwards. Since the tuning fork rod 39 is fixedly connected to the lifting platform 30 through the vertical rod 36 and the connecting plate 37, the tuning fork rod 39 also moves downwards and is gradually pulled out from the bottom of the casting sand box 1 and the dry sand. During the pulling process, the tuning fork rod 39 vibrates continuously, which helps to reduce the friction between the tuning fork rod 39 and the dry sand, making the pulling process smoother and reducing the disturbance to the surrounding sand mold. After the tuning fork rod 39 is pulled out, the rubber sealing plug 35 will automatically close or remain sealed under its own elasticity to prevent negative pressure leakage.

[0035] Reference Figure 8 and Figure 9 The casting mechanism is used to smoothly inject high-temperature molten iron into the forming mold 4, avoiding the impact force of the molten iron from breaking the forming mold. The casting mechanism includes a casting head pipe 16, two feed pipes 17, a sprue I 18, a sprue II 19, a pouring cup 21, a sealing plug 23, an arc plate I 25, and a spiral feed plate 22.

[0036] Reference Figure 2 , Figure 8 and Figure 9The casting head pipe 16 is horizontally positioned at its installation location. Two feed pipes 17 are fixedly connected to the bottom of the casting head pipe 16, with each feed pipe 17 corresponding to the top of a molding die 4. A sprue I 18 is fixedly connected to the top of the casting head pipe 16, and the top end of sprue I 18 extends through the sealing cover plate 3 to the outside of the casting sand box 1. A positioning ring 20 is fixed to the top of the sealing cover plate 3 and fitted onto the outer wall of sprue I 18 for positioning and support. The bottom end of sprue II 19 is connected to the top end of sprue I 18, and sprue II 19 is located inside the positioning ring 20. The positioning ring 20 supports sprue II 19. The pouring cup 21, which serves to position and straighten the iron, is fixed at the top of the pouring pipe II 19 and is used to receive the molten iron poured from the overhead crane or ladle. Multiple sliding rods I 24 are fixed on the inner wall of the bottom of the pouring cup 21. The sealing plug 23 is slidably sleeved on the outer wall of these sliding rods I 24. The shape of the sealing plug 23 matches the inlet of the pouring pipe II 19. In the initial state, the sealing plug 23 seals the inlet of the pouring pipe II 19 under its own gravity. The arc plate I 25 is fixed on the top of the sealing plug 23. Both the sealing plug 23 and the arc plate I 25 are made of high-temperature resistant, low-density hollow foamed ceramic material, which has a density much lower than that of molten iron.

[0037] Specifically, when molten iron is poured from a height into the pouring cup 21, the molten iron first directly impacts the top surface of the arc plate I 25. The arc-shaped surface of the arc plate I 25 physically disperses and buffers the vertical falling kinetic energy of the molten iron, preventing the molten iron from directly impacting the inlet of the sprue II 19. As the molten iron level in the pouring cup 21 rises rapidly, since the density of the sealing plug 23 and the arc plate I 25 is much lower than that of the molten iron, they will automatically float upward along the slide bar I 24 under the buoyancy of the molten iron. After the sealing plug 23 floats upward, the inlet of the sprue II 19 is opened, and the molten iron can flow smoothly through the sprue II 19. Throughout the process, the molten iron is physically transformed from an initial impact jet into a stable bottom pour, reducing the impact force of the molten iron on the forming mold 4 below.

[0038] The device also includes a controller electrically connected to both the drive motor 31 and the electromagnetic clutch 32. The controller is configured to: during the compaction phase, engage only the output main shaft of the electromagnetic clutch 32 to drive the rotating shaft 27 to rotate; and during the disengagement phase, engage both the output main shaft and the output branch shaft of the electromagnetic clutch 32 simultaneously to drive both the rotating shaft 27 and the lead screw 38 to rotate. The controller is also used to control the start and stop of the drive motor 31.

[0039] In another embodiment: Refer to Figure 8 and Figure 9Inside sprue II 19 and sprue I 18, spiral feed plates 22 are fixedly installed respectively. The two spiral feed plates 22 cooperate with each other at the connection to form a continuous spiral channel. When molten iron flows downward along sprue II 19 and sprue I 18 under the action of gravity, the spiral feed plates 22 force the molten iron to flow down along the spiral steps. During the spiral flow, the molten iron consumes most of the vertical kinetic energy through centrifugal friction and step obstruction, and is converted into a stable rotating flow. Finally, the molten iron enters the pouring head pipe 16 in a gentle laminar flow state, and is injected into the top of the two forming molds 4 through the two feed pipes 17 respectively. This spiral flow guiding structure further ensures that the molten iron contacts and vaporizes the forming mold smoothly when entering the cavity, rather than impacting it, effectively preventing the forming mold from breaking or displacing.

[0040] The method of using the intelligent casting and pouring device includes the following steps: S1. The operator first installs the casting sand box 1 on the top plate 13 with bolts and installs the bottom positioning mechanism. Multiple transmission screws 9 are screwed into the pre-set threaded holes on the inner wall of the bottom of the casting sand box 1. The screwing depth of the transmission screws 9 is adjusted according to the height of the forming mold 4, so that the pin II 8 fixed at the top of the transmission screw 9 is kept vertically upward. The bottom molding sand 2 is laid at the bottom of the casting sand box 1. The thickness of the bottom molding sand 2 should ensure that the conical head 10 at the top of the pin II 8 is exposed on the sand surface. The two forming molds 4 are hoisted into the casting sand box 1 in sequence using hoisting equipment. The pre-set positioning holes at the bottom of the forming mold 4 are aligned with the conical head 10 of the pin II 8. The forming mold 4 is slowly lowered so that the pin II 8 is fully inserted into the internal positioning hole of the forming mold 4. At this time, the two forming molds 4 are placed side by side on the top of the bottom molding sand 2. Each forming mold 4 is radially positioned by multiple pins II 8 at the bottom. S2. After completing the bottom positioning, perform the lateral limiting operation. The operator takes multiple pins I5 and slides them through the side wall of the casting sand box 1, passing through the first forming mold 4 and the second forming mold 4 in sequence, and then through the side wall of the casting sand box 1 on the other side. Hexagonal nuts 7 are fitted onto both ends of the pins I5. The hexagonal nuts 7 are rotated to move along the threaded sections 6 at both ends of the pins I5 until the two hexagonal nuts 7 are close to each other and tightly abut against the outer walls of both sides of the casting sand box 1. The hexagonal nuts 7 are then tightened to make the pins I5 in a tensioned state on the casting sand box 1. At this time, the pins I5 pass through and clamp the two forming molds 4 in the horizontal direction, restricting the rotation and tilting freedom of the forming molds 4 in the horizontal direction. Thus, the forming molds 4 are rigidly constrained in all six degrees of freedom, completing the positioning and fixing process. S3. The operator fills the casting sand box 1 with dry sand until the dry sand completely submerges the molding mold 4 and fills the entire casting sand box 1. A layer of plastic film is covered on the sand surface, and the sealing cover plate 3 is placed on the top of the casting sand box 1 and sealed and locked. The vibration motor 14 is started, and the vibration motor 14 drives the upper top plate 13 to generate low-frequency large-amplitude vibration. The upper top plate 13 drives the casting sand box 1 fixed on its top to vibrate synchronously. Under the action of vibration, the dry sand inside the casting sand box 1 begins to compact as a whole, and the gaps between the sand particles gradually decrease. During this process, since the molding mold 4 is rigidly fixed in the sand box by pin I 5 and pin II 8, even if the dry sand is in a fluidized state under the vibration excitation and generates upward buoyancy, the molding mold 4 will not float, shift or tilt. Its spatial position always remains consistent with the initial installation state. The overall vibration continues for a preset time until the dry sand in most areas of the casting sand box 1 reaches the initial compaction state. S4. After the overall vibration is completed, the local targeted vibration process for the dead corner area of ​​the complex inner cavity of the molding mold 4 is carried out. The operator starts the drive motor 31, and the drive motor 31 inputs power into the electromagnetic clutch 32. The electromagnetic clutch 32 first controls its output main shaft to rotate, while the output sub-shaft remains stationary. The output main shaft drives a rotating shaft 27 fixedly connected to it to rotate. This rotating shaft 27 drives another rotating shaft 27 to rotate synchronously through the synchronous pulley III 40, the synchronous pulley IV 41 and the first synchronous belt. When the two rotating shafts 27 rotate, they drive the turntables 28 fixed on their respective outer walls to rotate. The multiple arc plates II 29 fixed on the outer wall of the turntable 28 then make circular motion. During the rotation, the arc plates II 29 collide with the bottom end of the tuning fork rod 39 in turn. Each collision transfers mechanical kinetic energy to the tuning fork rod 39. S5. After being impacted, the tuning fork rod 39 generates high-frequency micro-amplitude vibration. This vibration is transmitted upward along the rod body of the tuning fork rod 39 and through the tip of the tuning fork rod 39 to the inside of the casting sand box 1. Since the tip of the tuning fork rod 39 extends into the position near the complex inner cavity or blind hole of the molding mold 4 through the rubber sealing plug 35, its high-frequency vibration directly acts on the dry sand in this area. The high-frequency vibration causes the dry sand particles in the dead corner area to overcome the friction and adhesion between particles instantly and present a fluidized state. The dry sand that was originally unable to flow becomes active under the excitation of high-frequency vibration and can flow and fill the deep holes, blind holes and complex grooves of the molding mold 4. Local targeted vibration continues for a preset time until the dry sand in all dead corner areas reaches the set compaction degree. S6. After the localized targeted compaction process is completed, the tuning fork 39 needs to be removed from the casting sand box 1 before pouring. The electromagnetic clutch 32 switches its working state, controlling its output main shaft and output branch shaft to rotate simultaneously. The output main shaft continues to drive the rotating shaft 27, turntable 28, and arc plate II 29 to rotate. The arc plate II 29 maintains the striking of the bottom end of the tuning fork 39, so that the tuning fork 39 is always in a high-frequency micro-amplitude vibration state during the extraction process. The output branch shaft drives the lead screw 38 to rotate through the synchronous pulley I 33, synchronous pulley II 34, and the second synchronous belt. The rotational motion of the lead screw 38 is converted into the linear motion of the lifting platform 30. Under the guidance of the slide rod II 42, the lifting platform 30... Moving downwards in the vertical direction; when the lifting platform 30 moves downwards, it drives all the tuning fork rods 39 to move downwards synchronously through the vertical rod 36 and the connecting plate 37. The tips of the tuning fork rods 39 gradually exit from the dry sand at the bottom of the casting sand box 1 and move downwards through the rubber sealing plug 35. During the downward movement of the tuning fork rods 39, as the tuning fork rods 39 continuously maintain high-frequency micro-amplitude vibration, the static friction between its outer wall and the surrounding dry sand is destroyed by the dynamic vibration and transformed into dynamic friction, and the frictional resistance is greatly reduced. At the same time, the vibration keeps the sand particles around the tuning fork rods 39 in a fluidized state, and will not cause large-scale sand mold disturbance or collapse due to the movement of the tuning fork rods 39. S7. When the tip of the tuning fork rod 39 is completely withdrawn from the rubber sealing plug 35, the rubber sealing plug 35 automatically closes due to its own elastic restoring force, sealing the channel formed at the bottom of the casting sand box 1 due to the tuning fork rod 39. At this time, all tuning fork rods 39 have been pulled out of the casting sand box 1, and the bottom of the casting sand box 1 remains sealed. After the tuning fork rod 39 is pulled out, the operator starts the vacuum pump 15. The vacuum pump 15 is connected to the inside of the casting sand box 1 through a pipe and continuously extracts the air in the casting sand box 1, so that the inside of the casting sand box 1 reaches the set vacuum degree. Under the action of negative pressure, the dry sand in the casting sand box 1 is tightly adsorbed together by atmospheric pressure to form a sand mold with sufficient strength and rigidity. The molding mold 4 is firmly wrapped in the compact sand mold. S8. After establishing negative pressure, the operator prepares to pour the molten iron from the overhead ladle into the pouring cup 21. As the molten iron falls, it first impacts the top surface of the curved plate I 25. The curved structure of the curved plate I 25 physically disperses and buffers the vertical kinetic energy of the molten iron, preventing it from directly impacting the inlet of the pouring pipe II 19. As the molten iron continues to be poured, the molten iron level in the pouring cup 21 rises rapidly. The sealing plug 23, made of high-temperature resistant, low-density hollow foamed ceramic, and the curved plate I 25 have a lower density than the molten iron. Under the buoyancy of the molten iron, the sealing plug 23 floats upward along the sliding rod I 24, and the curved plate I 25 follows the sealing plug. As the sealing plug 23 rises synchronously, the previously blocked inlet of the gating pipe II 19 is opened, allowing molten iron to flow smoothly through the gating pipe II 19. After entering the gating pipe II 19, the molten iron flows downward along the spiral channel formed by the fixed spiral feeding plate 22 inside the gating pipe II 19. During the spiral flow, the molten iron consumes a large amount of the kinetic energy of the vertical fall through centrifugal friction and step blocking, and the flow state changes from an impact jet to a stable rotating flow. The molten iron continues to flow downward into the gating pipe I 18. The spiral feeding plate 22 inside the gating pipe I 18 cooperates with the spiral feeding plate 22 inside the gating pipe II 19 to keep the molten iron in a rotating flow state and continue to flow downward. S9. After the molten iron flows through the pouring head pipe 16, it is injected into the top of the two forming molds 4 through two feed pipes 17 fixedly connected to the bottom of the pouring head pipe 16. At this time, the molten iron contacts the surface of the forming mold 4 in a low-speed, stable laminar flow state. When the high-temperature molten iron contacts the forming mold 4, the forming mold 4 is heated and vaporized. At the same time, the pins I5 and II8, made of bismuth-tin eutectic alloy, come into contact with the molten iron. Since the temperature of the molten iron is much higher than the melting point of 138 degrees Celsius of the bismuth-tin eutectic alloy, the pins I5 and II8 melt rapidly into liquid state at the moment of contact with the molten iron. The molten bismuth and tin are directly incorporated into the molten iron as alloying elements and fill the cavity with the molten iron, leaving no holes or inclusions inside the casting. Until the entire cavity is completely filled, after the casting has completely solidified and cooled, the vacuum is released, the sealing cover plate 3 is opened, the casting sand box 1 is taken out, and the sand is removed and cleaned to obtain the finished casting.

[0041] During use, the moving parts such as the transmission screw 9 at the bottom of the casting sand box 1 and the lead screw 38 in the U-shaped plate 26 need to be inspected and cleaned regularly to ensure their flexibility and reliability.

[0042] However, as is well known to those skilled in the art, the working principles and wiring methods of the drive motor 31, electromagnetic clutch 32 and vacuum pump 15 are all conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0043] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A positioning assembly for lost foam casting, comprising: Casting sand box (1); A sealing cover (3) is used to close the casting sand box (1); Bottom molding sand (2) is set on the bottom inner wall of the casting sand box (1); Two molding dies (4) are placed on top of the bottom molding sand (2), characterized in that they further include: Two sets of positioning mechanisms are set on the bottom inner wall of the casting sand box (1) for positioning the two forming molds (4); as well as, The limiting mechanism is used to limit the two forming molds (4) to prevent the forming molds (4) from shaking when the casting sand box (1) vibrates.

2. The positioning assembly for lost foam casting according to claim 1, characterized in that, The positioning mechanism includes multiple drive screws (9) and multiple pins II (8). The multiple drive screws (9) are all threaded to the bottom inner wall of the casting sand box (1) and arranged in a ring. The pins II (8) are fixed to the top of the drive screws (9). The top of the pins II (8) penetrates the bottom sand (2) and extends into the forming mold (4) to provide rigid support during vibration to prevent the forming mold (4) from shifting.

3. The positioning assembly for lost foam casting according to claim 2, characterized in that, The limiting mechanism includes multiple pins I (5) and multiple hexagonal nuts (7). The multiple pins I (5) slide through the casting sand box (1) and through the two forming molds (4). The outer wall of the pins I (5) is provided with two threaded sections (6) near both ends. The two hexagonal nuts (7) are respectively threaded to the pins I (5) through the threaded sections (6). The sides of the two hexagonal nuts (7) that are close to each other abut against the two sides of the casting sand box (1) to fix the pins I (5) and further fix the forming molds (4).

4. The positioning assembly for lost foam casting according to claim 3, characterized in that, Both ends of pin I (5) and the top of pin II (8) are provided with integrally formed conical heads (10); pin I (5) and pin II (8) are both made of bismuth-tin eutectic alloy, which provides rigid support during vibration and melts and is incorporated into the molten iron as an alloy component during high-temperature molten iron casting.

5. An intelligent casting and pouring device, comprising the lost foam casting positioning component as described in claim 4, characterized in that, It also includes a vibrating table, the casting sand box (1) is fixed to the top of the vibrating table, and the vibrating table is used to compact the sand in the casting sand box (1); The vibration mechanism is installed inside the vibration table and is used to compact the sand in the dead corner area of ​​the casting sand box (1) near the forming mold (4). The vibration mechanism includes multiple tuning fork rods (39) and multiple rubber sealing plugs (35). as well as, The casting mechanism is used to prevent the impact force of the falling molten iron from breaking the forming mold (4) when the molten iron is poured into the forming mold (4). The casting mechanism includes a casting head tube (16) and two feed tubes (17). The two feed tubes (17) are fixedly connected and communicate with the bottom of the casting head tube (16) and are respectively located at the top of the two forming molds (4).

6. The intelligent casting and pouring device according to claim 5, characterized in that, The vibration table includes a base (11), an upper plate (13), multiple vibration dampers (12) and multiple vibration motors (14). The upper plate (13) is located above the base (11). The multiple vibration dampers (12) are fixed between the upper plate (13) and the base (11). The multiple vibration motors (14) are fixed at the bottom of the upper plate (13) and are used to drive the upper plate (13) to drive the casting sand box (1) to vibrate. The vibration mechanism also includes a U-shaped plate (26), two rotating shafts (27), two turntables (28), a drive motor (31), an electromagnetic clutch (32), a lifting platform (30), and a lead screw (38). The U-shaped plate (26) is fixed to the bottom of the upper top plate (13), the two rotating shafts (27) are rotatably connected to the bottom of the upper top plate (13), and the two turntables (28) are respectively fixedly sleeved on the outer walls of the two rotating shafts (27). Multiple arc-shaped plates II (29) are fixed on the outer walls of the turntables (28), and the top ends of the multiple tuning fork rods (39) slide... The upper top plate (13) is moved through the upper plate, and multiple rubber sealing plugs (35) are fixedly inserted through the bottom inner wall of the casting sand box (1). The top end of the tuning fork rod (39) slides through the rubber sealing plug (35). The top end of the tuning fork rod (39) is located below the molding mold (4). The drive motor (31) is fixed to the bottom of the U-shaped plate (26). The electromagnetic clutch (32) is fixed to the bottom inner wall of the U-shaped plate (26). The output shaft of the drive motor (31) is fixedly connected to the input shaft of the electromagnetic clutch (32). The output spindle of the electromagnetic clutch (32) is fixedly connected to the bottom end of one of the rotating shafts (27) to drive the turntable (28) and the arc plate II (29) to rotate and strike the tuning fork (39). The lifting platform (30) is slidably connected inside the U-shaped plate (26). The bottom ends of the two rotating shafts (27) pass through the lifting platform (30). The lead screw (38) is rotatably connected to the bottom inner wall of the U-shaped plate (26) and threaded through the lifting platform (30). The output shaft of the electromagnetic clutch (32) is connected to the lead screw (38) for driving. The lead screw (38) rotates to drive the lifting platform (30) and the tuning fork (39) to rise and fall. The two rotating shafts (27) are connected by a first synchronous belt through synchronous pulley III (40) and synchronous pulley IV (41). The output shaft of the electromagnetic clutch (32) is connected to the lead screw (38) through synchronous pulley I (33), synchronous pulley II (34) and the second synchronous belt. The top of the lifting platform (30) is fixed with multiple vertical rods (36). The vertical rods (36) are fixedly connected to the corresponding tuning fork (39) through a connecting plate (37).

7. The intelligent casting and pouring device according to claim 6, characterized in that, The casting mechanism also includes a casting pipe I (18), a casting pipe II (19), a pouring cup (21), and a sealing plug (23). The casting pipe I (18) is fixedly connected to and communicates with the top of the casting head pipe (16), and the top end of the casting pipe I (18) passes through the sealing cover plate (3). The bottom end of the casting pipe II (19) is connected to the top end of the casting pipe I (18). The pouring cup (21) is fixed to the top end of the casting pipe II (19). The bottom inner wall of the pouring cup (21) is on multiple sliding rods I (24). The sealing plug (23) is slidably sleeved on multiple sliding rods I (24) to seal the casting pipe II (19). The top of the sealing plug (23) is fixed with an arc plate I (25). The sealing plug (23) and the arc plate I (25) are both made of high-temperature resistant, low-density hollow foamed ceramic with a density less than that of molten iron. During the pouring process, molten iron falls onto the arc plate I (25). As the molten iron level rises, the sealing plug (23) and the arc plate I (25) automatically float up to allow the pouring pipe II (19) to flow smoothly.

8. The intelligent casting and pouring device according to claim 7, characterized in that, Both the gating pipe II (19) and the gating pipe I (18) are fixed with spiral feed plates (22). The two spiral feed plates (22) cooperate to guide the molten iron to flow downwards in order to consume its vertical kinetic energy.

9. The intelligent casting and pouring device according to claim 8, characterized in that, The vibration table also includes a vacuum pump (15) and a controller. The vacuum pump (15) is fixed to the top of the upper plate (13). The air inlet of the vacuum pump (15) is connected to the interior of the casting sand box (1) through a pipe. It is used to evacuate the interior of the casting sand box (1) to a vacuum after vibration. The controller is electrically connected to the vacuum pump (15), the electromagnetic clutch (32), and the drive motor (31).

10. A method of using an intelligent casting and pouring device, applied to the intelligent casting and pouring device according to claim 9, characterized in that, Includes the following steps: S1. Fix the casting sand box (1) on the top plate (13), screw the transmission screw (9) into the bottom of the casting sand box (1) to keep the pin II (8) vertical, and lay the bottom sand (2) at the bottom of the casting sand box (1) until the cone head (10) protrudes from the sand surface; hoist the two forming molds (4) into the casting sand box (1), insert the pin II (8) into the bottom positioning hole of the forming mold (4), and place the two forming molds (4) side by side on the top of the bottom sand (2); S2. Insert pin I (5) through one side wall of the casting sand box (1), pass through two molding dies (4) in sequence, and then exit through the other side wall. Put hexagonal nuts (7) on both ends of pin I (5) and tighten them along the thread section (6) until they abut against the outer wall of the casting sand box (1), so that pin I (5) is tensioned and passes through and clamps the two molding dies (4). S3. Fill the casting sand box (1) with dry sand until it submerges the molding mold (4), cover it with plastic film, and then cover it with a sealing cover plate (3) and lock it. Start the vibration motor (14) to drive the top plate (13) to vibrate the casting sand box (1) to make the dry sand compact. S4. Start the drive motor (31) and drive the rotating shaft (27) to rotate through the electromagnetic clutch (32). The rotating shaft (27) drives another rotating shaft (27) to rotate synchronously through the synchronous pulley III (40), the synchronous pulley IV (41), and the first synchronous belt. The arc plate II (29) on the turntable (28) rotates with the turntable (28) and collides with the bottom end of the tuning fork rod (39). S5. The tuning fork rod (39) generates high-frequency micro-amplitude vibration upon impact, which is transmitted through the tip to the dead corner area of ​​the molding mold (4) inside the casting sand box (1) via the rubber sealing plug (35), causing the dry sand to fluidize and fill the fine structure. S6. The electromagnetic clutch (32) switches states to make the output shaft rotate simultaneously. Through the synchronous pulley I (33), synchronous pulley II (34), and the second synchronous belt, the lead screw (38) is driven to rotate, which drives the lifting platform (30) to move downward along the slide bar II (42). Through the vertical rod (36) and the connecting plate (37), all the tuning fork rods (39) are pulled out synchronously downward. During the pulling process, the tuning fork rods (39) maintain high-frequency micro-amplitude vibration. S7. After the tip of the tuning fork rod (39) exits the rubber sealing plug (35), the rubber sealing plug (35) automatically closes and seals; start the vacuum pump (15) to extract the air in the casting sand box (1) to the set vacuum level, so that the dry sand forms a sand mold; S8. Pour the molten iron into the pouring cup (21). After the molten iron impacts the arc plate I (25), it flows in. The sealing plug (23) and the arc plate I (25) float up along the slide bar I (24) under the buoyancy of the molten iron, opening the entrance of the pouring pipe II (19). The molten iron flows downward spirally through the spiral feeding plate (22) in the pouring pipe II (19) and the pouring pipe I (18). S9. After the molten iron flows through the pouring head pipe (16), it is injected into the top of the forming mold (4) through the feed pipe (17). The forming mold (4) is vaporized, and pin I (5) and pin II (8) melt and merge into the molten iron after contact with it. After the casting solidifies and cools, the vacuum is released, the sealing cover plate (3) is opened, and the sand box (1) is taken out for sand removal and cleaning.

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