High chromium wear-resistant steel ball casting system

Abstract

This invention relates to a high-chromium wear-resistant steel ball casting system, comprising: a smelting furnace, a mobile casting machine, multiple casting sand boxes, a tilting device, an exhaust device, and a mobile trolley. The exhaust device includes: an exhaust box fixedly installed at the bottom of the casting sand box, with a strip-shaped through hole on the side wall of the portion extending into the casting sand box, a circular through hole at the top of the exhaust box, and a vent at the bottom; an exhaust pipe fixedly installed at the top of the mobile trolley, capable of moving with the mobile trolley along the lower double guide rails to a position aligned vertically with the target casting sand box, one end of the exhaust pipe being detachably connected to the vent; a drive mechanism of the mobile trolley actively following the movement of the casting sand box based on the detection signal of the pull wire, achieving synchronous positioning of the exhaust pipe and the casting sand box; and a locking device for locking or releasing the end of the exhaust pipe connected to the vent.

Description

Technical Field

[0001] This invention relates to the field of casting equipment technology, and specifically to a high-chromium wear-resistant steel ball casting system. Background Technology

[0002] High-chromium wear-resistant steel balls are widely used in grinding processes in industries such as mining and cement, with high demand and requirements for the internal quality of castings and production efficiency. In negative pressure molding casting processes that use iron balls as filling and chilling media, it is necessary to connect an exhaust pipe to the bottom of the casting sand box to continuously draw negative pressure during casting and cooling, so that the iron balls are tightly attached to the outer periphery of the molding sand, providing rigid support and expelling gas.

[0003] In existing technologies, casting sand boxes typically need to move between multiple workstations, and the connection and disconnection of the venting pipes are critical aspects affecting production efficiency. Traditional methods often rely on manual connection, which suffers from low positioning accuracy, cumbersome operation, and, under high negative pressure conditions, the pipe joints are prone to loosening due to vibration or accidental air interruption, leading to loss of negative pressure and severely impacting casting quality and production safety. Some automated connection solutions have complex structures and insufficient precision in controlling the synchronous movement of the sand box and pipes, making it difficult to adapt to the production rhythm of multiple sand boxes operating in parallel and continuously. Summary of the Invention

[0004] The purpose of this invention is to provide a high-chromium wear-resistant steel ball casting system, which achieves precise follow-up and automatic docking of the air intake pipe and the casting sand box through a double-layer guide rail layout and synchronous positioning by a wire puller, and ensures the reliability of the connection through a purely mechanical locking device.

[0005] To achieve the above objectives, the present invention provides a high-chromium wear-resistant steel ball casting system, comprising: Smelting furnace; A mobile casting machine is used to take molten iron from a smelting furnace and move it to the casting position; The tunnel has an upper double guide rail at the top and a lower double guide rail at the bottom. Multiple casting sand boxes are arranged side by side and slidably on the upper double guide rails, and the casting sand boxes are pre-filled with iron balls; The overturning device, located downstream of the casting station, is used to overturn the cooled casting sand box to remove the castings and iron balls. It also includes a vacuum system and a mobile trailer. The mobile trolley is movably mounted on the lower double guide rails and has an independent drive mechanism; The air extraction device includes: The suction box is fixedly installed at the bottom of the casting sand box. The side wall of the part of the suction box that extends into the casting sand box has a strip-shaped through hole. The top of the suction box has a circular through hole, and the bottom has a ventilation port. The suction pipe is fixedly installed on the top of the mobile trolley and can move along the lower double guide rails with the mobile trolley to a position aligned vertically with the target casting sand box. One end of the suction pipe is detachably connected to the air inlet. A pull wire is connected at both ends to the casting sand box and the mobile trolley, respectively, to detect the relative position of the two. The drive mechanism of the mobile trolley actively follows the movement of the casting sand box according to the detection signal of the pull wire, so as to realize the synchronous positioning of the air intake pipe and the casting sand box. A locking device, located at the bottom of the intake box, is used to lock or release the end of the intake pipe connected to the air inlet.

[0006] Preferably, the strip-shaped through holes are respectively opened on the four side walls of the part of the air intake box that extends into the casting sand box.

[0007] Preferably, the portion of the intake pipe near the air inlet is equipped with a corrugated hose; The air extraction device also includes a cylinder. The cylinder body is fixed below the corrugated hose of the mobile trolley or the air extraction pipe. Its telescopic rod is connected to the upper end of the corrugated hose. The extension and retraction of the cylinder drives one end of the air extraction pipe to approach or move away from the air inlet.

[0008] More preferably, the locking device includes: The box body is fixed to the bottom of the air intake box and has a stepped through hole inside; A sliding column is slidably installed in a stepped through hole, and its top end has a trapezoidal joint; A spring, fitted on the outside of the sliding column and housed within the stepped through-hole, is used to apply elastic pressure to the sliding column in the direction of the intake pipe.

[0009] A further preferred embodiment has a fixed ring fixed at one end of the intake pipe near the air inlet, the fixed ring having a trapezoidal cross-section with the larger diameter end facing downwards; The sliding ring is slidably fitted onto the intake pipe and located below the fixed ring. In the first position, there is a preset distance between the sliding ring and the fixed ring. The upper end face of the sliding ring is provided with a trapezoidal protrusion, and a groove is provided between the trapezoidal protrusion and the lower end face of the fixed ring, so that the trapezoidal protrusion can slide into the groove; In the locked position, the trapezoidal connector snaps into the slot to lock one end of the intake pipe (200) at the air inlet.

[0010] More preferably, a stop ring is fixed below the sliding ring to limit the downward movement of the sliding ring to the extreme position. When the sliding ring abuts against the stop ring, the sliding ring is in the first position.

[0011] In a further preferred embodiment, the inner side of each vent of the intake box is covered with a filter screen, and the mesh size of the filter screen is smaller than the minimum particle size of the iron ball.

[0012] Preferably, it also includes a screening device, a conveying device, and a backfilling device; the screening device is located behind the overturning device and is used to screen and separate the overturned castings from the iron balls; the conveying device is used to convey the screened iron balls to the backfilling device for backfilling into the casting sand box.

[0013] Preferably, the air extraction device is used to create negative pressure in the casting sand box during the casting and cooling processes, so that the iron balls adhere tightly to the outer periphery of the molding sand under the action of negative pressure, and the gas generated by the molding sand is discharged.

[0014] Preferably, the puller is a mechanical stroke puller sensor.

[0015] The beneficial effects of this invention are as follows: 1. This invention sets up two layers of double guide rails in the tunnel. The upper guide rail is arranged with multiple parallel casting sand boxes, and the lower guide rail is arranged with a mobile trolley. This allows multiple sand boxes to work in parallel at different workstations such as casting, cooling, and turning, realizing continuous production line production and greatly improving casting efficiency. 2. The suction pipe is fixed on the mobile trolley and moves with the trolley on the lower guide rail to the position aligned with the target casting sand box, avoiding the need to configure an independent suction pipe for each sand box, reducing equipment costs and pipeline layout complexity. 3. The two ends of the puller are connected to the casting sand box and the air suction pipe respectively. When the casting sand box slides on the upper double guide rail, the puller pulls the air suction pipe and the moving trolley to follow, so that the two always maintain a synchronous positioning relationship. There is no need to set up an additional independent positioning drive mechanism. The structure is simple, synchronous and reliable, and provides a precise positional basis for subsequent automatic docking. 4. The intake pipe end is automatically approached and moved away via a cylinder-driven, corrugated hose. Combined with the trapezoidal connector and slot in the locking device, automatic docking, locking, and releasing of the intake pipe is achieved without manual intervention, resulting in a high degree of automation. Specifically, when the cylinder extends, it drives the pipe end upwards. Guided by the trapezoidal surface of the fixed ring, the trapezoidal connector retracts into the stepped through-hole via a compressed spring. Upon reaching the slot, the spring force pushes the trapezoidal connector into the slot, completing the locking. During unlocking, the cylinder further extends upwards, causing the trapezoidal connector to pass over the sliding ring. Then, the cylinder retracts, and the trapezoidal connector pushes the sliding ring upwards until it abuts the fixed ring, at which point the sliding ring stops. The pipe end continues to descend, causing the trapezoidal connector to disengage from the slot, completing the release.

[0016] 5. Strip-shaped and circular through holes are opened on the four sides and the top of the suction box to ensure uniform air extraction, which is conducive to forming a uniform negative pressure distribution in the casting sand box and promoting the full penetration of molten iron into the gaps between the iron beads. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the combination of the casting sand box and the air intake pipe of the present invention; Figure 3 This is a schematic diagram of the combination of the air intake box and the air intake pipe of the present invention; Figure 4 This is a front view of the air intake box and air intake pipe of the present invention; Figure 5 This is a cross-sectional view of the locking device of the present invention; Figure 6 This is a schematic diagram of the combination of the locking device and the intake pipe of the present invention.

[0019] Explanation of reference numerals in the attached figures 1. Mobile casting machine; 2. Casting sand box; 3. Tilting device; 4. Smelting furnace; 10. Mobile trailer; 100. Suction box; 110. Circular through hole; 120. Strip through hole; 200. Intake pipe; 210. Cylinder; 220. Corrugated hose; 310. Fixed ring; 320. Sliding ring; 321. Trapezoidal protrusion; 330. Locking device; 331. Box body; 332. Sliding column; 3321. Trapezoidal joint; 333. Spring; 340, Card slot; 350, Stop ring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] like Figure 1 As shown, the high-chromium wear-resistant steel ball casting system provided in this embodiment mainly includes a smelting furnace 4, a mobile casting machine 1, a tunnel, several casting sand boxes 2, a turning device 3, a screening device, a conveying device, a backfilling device, and a matching exhaust device and a mobile trolley 10.

[0022] The system adopts an assembly line layout: the smelting furnace 4 is located upstream of the casting station and is used to smelt high-chromium cast iron; the mobile casting machine 1 is set up on one side of the casting station and can move back and forth along the transverse track. After receiving molten iron from the smelting furnace 4, it moves to the side of the corresponding casting sand box 2 to complete the casting operation. The tunnel extends along the conveying direction of the production line. An upper double guide rail is laid above the tunnel along the conveying direction, and a lower double guide rail is laid at the bottom of the tunnel along the same direction; multiple casting sand boxes 2 are slidably installed side by side on the upper double guide rail and can flow through the casting station, cooling station, and turning station in sequence; the mobile trolley 10 is slidably installed on the lower double guide rail and is equipped with an independent drive motor and walking wheel set, which can move independently along the lower double guide rail.

[0023] The turning device 3 is located at the turning station downstream of the casting station. It uses a 180° clamping and turning mechanism to clamp and turn the cooled casting sand box 2, dumping out the castings and filling iron balls inside the sand box together. Downstream of the turning device 3, a screening device, a conveying device, and a backfilling device are arranged in sequence: the screening device uses a vibrating screen structure to separate the high-chromium wear-resistant steel ball castings and iron balls according to their particle size; the conveying device uses a bucket elevator or screw conveyor to transport the screened reusable iron balls to the backfilling device; the backfilling device is set above the empty casting sand box 2 to quantitatively fill the casting sand box 2 with iron balls, realizing the recycling of the quenching medium.

[0024] like Figure 2 , Figure 3 As shown, each casting sand box 2 is fixedly equipped with a suction box 100 at its bottom. The suction box 100 is a closed, hollow metal box, with its upper half extending into the internal cavity of the casting sand box 2 and its lower half exposed on the bottom surface of the casting sand box 2. Each of the four side walls of the suction box 100 extending into the sand box has transversely extending strip-shaped through holes 120; the top surface of the suction box 100 has several arrayed circular through holes 110; the strip-shaped through holes 120 and the circular through holes 110 together form a uniform air extraction passage, allowing the gas inside the casting sand box 2 to flow into the suction box 100 from all directions.

[0025] Furthermore, each vent hole of the suction box 100 is covered with a filter screen. The mesh size of the filter screen is smaller than the minimum particle size of the iron balls filled in the casting sand box 2, which can prevent the iron balls and molding sand debris from being sucked into the suction pipe and causing blockage, ensuring that the suction passage remains unobstructed. A vent is provided at the center of the bottom surface of the suction box 100, serving as the external connection port of the suction system.

[0026] A suction pipe 200 is fixedly installed on the top of the mobile trolley 10. The upper end of the suction pipe 200 is a docking end, which corresponds to the ventilation interface at the bottom of the casting sand box 2 above. The lower end of the suction pipe 200 is connected to the negative pressure dust removal system of the factory area through a flexible telescopic pipe. The flexible telescopic pipe can extend and retract synchronously with the movement of the mobile trolley 10, keeping the suction passage continuously connected during the movement of the trolley.

[0027] A pull cable is installed between the casting sand box 2 and the mobile trolley 10. In this embodiment, the pull cable is a mechanical stroke pull cable sensor. One end of the pull cable is fixedly connected to the bottom positioning seat of the casting sand box 2, and the other end is fixedly connected to the frame of the mobile trolley 10. When the casting sand box 2 moves along the upper double guide rail, the pull cable detects the relative displacement between the casting sand box 2 and the mobile trolley 10 in real time and feeds back the displacement signal to the drive mechanism of the mobile trolley 10. The drive mechanism adjusts the walking speed in real time according to the feedback signal, so that the mobile trolley 10 actively follows the casting sand box 2 and moves synchronously, always keeping the docking end of the air intake pipe 200 and the air inlet coaxially aligned, achieving high-precision synchronous positioning.

[0028] like Figure 3 , Figure 4 As shown, a corrugated hose 220 is installed on the section of the intake pipe 200 near the upper docking end. The corrugated hose 220 is made of high-temperature resistant metal corrugated pipe and has axial expansion and contraction capabilities. Its upper and lower ends are respectively sealed and fixedly connected to the upper and lower pipe sections of the intake pipe 200. A cylinder 210 is fixedly installed on the intake pipe 200. The cylinder body of the cylinder 210 is located below the corrugated hose 220, and the telescopic rod of the cylinder 210 extends upward, with its top end fixedly connected to the upper pipe section of the corrugated hose 220. Through the extension and retraction of the telescopic rod of the cylinder 210, the upper docking end of the intake pipe 200 can be driven to rise and fall axially, realizing the approach and separation from the air inlet.

[0029] The bottom of the air intake box 100 is equipped with a locking device 330 around the air inlet, which, together with the matching structure of the connecting end of the air intake pipe 200, enables automatic locking and unlocking after docking.

[0030] like Figure 5 and Figure 6As shown, the locking device 330 includes a housing 331, a sliding column 332, and a spring 333. The housing 331 is fixedly installed on the bottom surface of the intake box 100. The housing 331 has a stepped through-hole extending radially in the horizontal direction, formed by a combination of a large-diameter hole and a small-diameter hole on the same axis. The sliding column 332 is slidably fitted into the stepped through-hole along the axial direction. Its column body has a limiting protrusion that slides within the large-diameter hole, and the rod portion of the column passes through the small-diameter hole. The spring 333 is sleeved on the outside of the rod portion of the sliding column 332 and accommodated within the large-diameter hole. Its two ends abut against the stepped surface of the stepped through-hole and the limiting protrusion of the sliding column 332, respectively, constantly applying an elastic thrust towards the center of the air inlet to the sliding column 332. The sliding column 332 has a trapezoidal connector 3321 at its inner end facing the center of the ventilation interface. The axial section of the trapezoidal connector 3321 is trapezoidal, and both its upper and lower surfaces are guide slopes.

[0031] like Figure 5 , Figure 6 As shown, a fixing ring 310 is fixedly fitted on the outer wall of the upper end of the intake pipe 200. The axial cross-section of the fixing ring 310 is trapezoidal, with its large diameter end facing down and its small diameter end facing up. The outer surface is a guide slope that slopes outward from top to bottom. A sliding ring 320 is slidably fitted below the fixing ring 310. The sliding ring 320 can slide axially along the outer wall of the intake pipe 200. An annular trapezoidal protrusion 321 is provided on the upper end face of the sliding ring 320. The axial cross-section of the trapezoidal protrusion 321 is also trapezoidal, with its large diameter end facing down. It is complementary in shape to the annular groove 340 that is concave on the lower end face of the fixing ring 310. The trapezoidal protrusion 321 can be fitted into the groove 340.

[0032] Below the sliding ring 320, a stop ring 350 is also fixedly fitted on the outer wall of the air intake pipe 200. The stop ring 350 is used to limit the downward sliding limit position of the sliding ring 320. When the sliding ring 320 falls and abuts against the stop ring 350, the sliding ring 320 is in the first position. At this time, there is a preset axial distance between the trapezoidal protrusion 321 and the groove 340 at the lower end of the fixed ring 310.

[0033] The process of locking and unlocking separation: Docking and locking process: After the mobile trolley 10 drives the suction pipe 200 to complete synchronous positioning with the casting sand box 2, the telescopic rod of the cylinder 210 extends, pushing the upper section of the corrugated hose 220 upward, causing the docking end of the suction pipe 200 to approach the ventilation port. During the upward movement, the outer inclined surface of the fixed ring 310 first contacts the trapezoidal connector 3321 of the sliding column 332. Under the guidance of the inclined surface, the trapezoidal connector 3321 pushes the sliding column 332 to compress the spring 333, retracting into the stepped through hole of the box 331. When the suction pipe 200 continues to move upward until the slot 340 aligns with the trapezoidal connector 3321, the elastic force of the spring 333 pushes the sliding column 332 back to its original position, and the trapezoidal connector 3321 is engaged in the slot 340. At this time, the cylinder 210 stops operating, completing the sealed docking and axial locking of the suction pipe 200 and the ventilation port.

[0034] Unlocking and Disconnection Process: When the suction connection needs to be disconnected, the telescopic rod of cylinder 210 extends upward a short distance, causing the connecting end of the suction pipe 200 to continue moving upward, so that the trapezoidal connector 3321 moves below the sliding ring 320; due to the limitation of the stop ring 350, the sliding ring 320 will not move downward. Then the telescopic rod of cylinder 210 begins to retract, causing the suction pipe 200 to move downward as a whole. At this time, the upper inclined surface of the trapezoidal connector 3321 abuts against the lower end surface of the sliding ring 320, causing the sliding ring 320 to move upward together; when the trapezoidal protrusion 321 at the upper end of the sliding ring 320 is fully engaged in the slot 340, the sliding ring 320 is blocked by the fixing ring 310 and cannot continue to move upward. As the cylinder 210 telescopic rod continues to retract, the intake pipe 200 continues to descend. Guided by the inner inclined surface formed by the sliding ring 320 and the fixed ring 310, the trapezoidal connector 3321 compresses the spring 333 again and retracts outward, finally disengaging from the slot 340 and completing the unlocking. Subsequently, the intake pipe 200 continues to descend with the cylinder 210 to reset to its initial height, ready for the next docking.

[0035] Complete system workflow: Sand preparation: Fill the empty casting sand box 2 with molding sand and mold, and cover it with iron beads. The backfilling device will replenish the sand box with a fixed amount of recycled iron beads.

[0036] Synchronous alignment: The casting sand box 2 moves along the upper double guide rail to the casting station, and the moving trolley 10 follows the lower double guide rail through the feedback of the pull wire, keeping the air intake pipe 200 and the air intake box 100 aligned vertically.

[0037] Docking and locking: Cylinder 210 drives the air intake pipe 200 to move upward, and the locking device 330 completes the automatic docking and locking with the air inlet; the negative pressure system is activated, and the air intake box 100 draws air from the inside of the casting sand box 2 to form a negative pressure, so that the iron balls are tightly attached to the outside of the molding sand, providing rigid support.

[0038] Casting and cooling: The mobile casting machine 1 receives molten iron from the smelting furnace 4 and moves it above the corresponding casting sand box 2 to complete the casting. After casting, the sand box moves into the cooling station with the production line, and the mobile trolley 10 follows synchronously to maintain the negative pressure of the exhaust and discharge the gas generated by the heating of the molding sand.

[0039] Unlocking and unloading: After the casting sand box 2 has cooled down, it moves to the flipping station. The cylinder 210 completes the unlocking and separation of the suction pipe 200, and the moving trolley 10 is separated from the casting sand box 2 and returns to receive the next sand box.

[0040] Turning and screening: The turning device 3 clamps the casting sand box 2 and completes a 180° turn, unloading the casting and iron balls together to the screening device; the screening device separates the high-chromium wear-resistant steel balls and the recycled iron balls, and the recycled iron balls are sent back to the backfilling device via the conveying device to enter the next production cycle.

[0041] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A high-chromium wear-resistant steel ball casting system, comprising: Smelting furnace; A mobile casting machine is used to take molten iron from the smelting furnace and move it to the casting position; The tunnel has an upper double guide rail at the top and a lower double guide rail at the bottom. Multiple casting sand boxes are arranged side by side and slidably on the upper double guide rail, and the casting sand boxes are pre-filled with iron beads; A flipping device, located downstream of the casting station, is used to flip the cooled casting sand box to remove the casting and iron balls. Its features include an air extraction device and a mobile trolley. The mobile trolley is movably mounted on the lower double guide rails and has an independent drive mechanism; The air extraction device includes: An air intake box is fixedly installed at the bottom of the casting sand box. A strip-shaped through hole is opened on the side wall of the part of the air intake box that extends into the casting sand box. A circular through hole is opened at the top of the air intake box and an air inlet is opened at the bottom. An air intake pipe is fixedly installed on the top of the mobile trolley and can move along the lower double guide rail with the mobile trolley to a position aligned vertically with the target casting sand box. One end of the air intake pipe is detachably connected to the air inlet. A pull wire is connected at both ends to the casting sand box and the mobile trolley, respectively, to detect the relative position of the two; the drive mechanism of the mobile trolley actively follows the movement of the casting sand box according to the detection signal of the pull wire, so as to realize the synchronous positioning of the air intake pipe and the casting sand box. A locking device is provided at the bottom of the air intake box, which is used to lock or release the end of the air intake pipe connected to the air inlet.

2. The high-chromium wear-resistant steel ball casting system according to claim 1, characterized in that, The strip-shaped through holes are respectively opened on the four side walls of the part of the air intake box that extends into the casting sand box.

3. The high-chromium wear-resistant steel ball casting system according to claim 1, characterized in that, The portion of the air intake pipe near the air inlet is equipped with a corrugated hose; The air extraction device also includes a cylinder, the cylinder body of which is fixed below the mobile trolley or the corrugated hose of the air extraction pipe, and its telescopic rod is connected to the upper end section of the corrugated hose. The extension and retraction of the cylinder drives one end of the air extraction pipe to approach or move away from the air inlet.

4. The high-chromium wear-resistant steel ball casting system according to claim 3, characterized in that, The locking device includes: The box body is fixed to the bottom of the air intake box body and has a stepped through hole inside; A sliding column is slidably disposed within the stepped through hole, and its top end has a trapezoidal joint. A spring, sleeved on the outside of the sliding column and housed within the stepped through hole, is used to apply elastic pressure to the sliding column in the direction of the intake pipe.

5. The high-chromium wear-resistant steel ball casting system according to claim 4, characterized in that, A fixing ring is fixedly provided at one end of the air intake pipe near the air inlet. The cross-section of the fixing ring is trapezoidal with the larger diameter end facing down. The sliding ring is slidably fitted onto the air intake pipe and located below the fixed ring. In the first position, there is a preset distance between the sliding ring and the fixed ring. The upper end face of the sliding ring is provided with a trapezoidal protrusion, and a groove is provided between the trapezoidal protrusion and the lower end face of the fixed ring, so that the trapezoidal protrusion can slide into the groove; In the locked state, the trapezoidal connector is inserted into the slot to lock one end of the intake pipe (200) at the air inlet.

6. The high-chromium wear-resistant steel ball casting system according to claim 5, characterized in that, A stop ring is fixed below the sliding ring to limit the downward movement of the sliding ring to its extreme position. When the sliding ring abuts against the stop ring, the sliding ring is located at the first position.

7. The high-chromium wear-resistant steel ball casting system according to claim 1, characterized in that, Each vent of the air intake box is covered with a filter screen, and the mesh size of the filter screen is smaller than the minimum particle size of the iron beads.

8. The high-chromium wear-resistant steel ball casting system according to claim 1, characterized in that, It also includes a screening device, a conveying device, and a backfilling device; the screening device is located behind the overturning device and is used to screen and separate the overturned castings from the iron balls; the conveying device is used to convey the screened iron balls to the backfilling device for backfilling into the casting sand box.

9. The high-chromium wear-resistant steel ball casting system according to claim 1, characterized in that, The air extraction device is used to create negative pressure in the casting sand box during the casting and cooling processes, so that the iron balls adhere tightly to the outer periphery of the molding sand under the negative pressure and the gas generated by the molding sand is discharged.

10. The high-chromium wear-resistant steel ball casting system according to claim 1, characterized in that, The puller is a mechanical stroke puller sensor.

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