Sand cleaning and recycling device for production of complex thin-walled magnesium alloy cassettes

Abstract

This invention discloses a sand removal and recovery device for the production of complex thin-walled magnesium alloy casings, relating to the technical field of casting sand removal and recovery. The device includes a support frame with a motor base connected to its upper end. A sand removal motor is horizontally installed inside the motor base. The sand removal motor is horizontally connected to a sand removal roller located on the upper side of the support frame via an output shaft. A connecting outer cylinder is engaged with the outer cylindrical wall of the sand removal roller and rotatably connected to it. An inlet hopper is connected to the upper outer side of the connecting outer cylinder, and a discharge pipe is connected to the lower outer side of the connecting outer cylinder. By tumbling and cleaning the casing with multiple rolling sand removal components inside the sand removal roller, and simultaneously using high-frequency vibration generated by a vibration component to clean the casing, the sand removal roller performs a dual sand removal function on the casing. This improves the sand removal efficiency for complex thin-walled magnesium alloy casings and prevents the removed sand from accumulating inside the sand discharge trough, ensuring smooth recovery of sand particles.

Description

Technical Field

[0001] This invention belongs to the technical field of casting sand removal and recovery, specifically relating to a sand removal and recovery device used in the production of complex thin-walled magnesium alloy casings. Background Technology

[0002] Currently, complex thin-walled magnesium alloy casings generally suffer from difficulties and low efficiency in sand removal after casting. Traditional sand removal equipment often uses a single tumbling or vibration method, which is insufficient to completely remove stubborn molding sand from the inside of the casing, especially in thin-walled structures, resulting in low sand removal efficiency.

[0003] To address the aforementioned issues, this patent proposes a highly efficient sand removal and recovery device to solve the technical problems mentioned above. Summary of the Invention

[0004] The purpose of this invention is to provide a sand removal and recovery device for the production of complex thin-walled magnesium alloy casings, in order to solve the problem mentioned in the background art that traditional sand removal equipment mostly adopts a single tumbling or vibration method, resulting in low sand removal efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sand-removing and recycling device for the production of complex thin-walled magnesium alloy casings, comprising a support frame, a motor base connected to the upper end of the support frame, and a sand-removing motor horizontally arranged inside the motor base. The sand-removing motor is horizontally connected to a sand-removing roller located on the upper side of the support frame via an output shaft. A connecting outer cylinder is engaged with the outer cylindrical wall of the sand-removing roller and rotatably connected to the connecting outer cylinder. An inlet hopper is connected to the upper outer side of the connecting outer cylinder, and an outlet pipe is connected to the lower outer side of the connecting outer cylinder. The lower end of the outlet pipe... The opening extends to the lower end of the support frame and is fixedly connected to the support frame. The end of the sand cleaning roller away from the sand cleaning motor is rotatably connected to a sand collection box, and the lower end of the sand collection box is connected to a sand discharge pipe. The lower end of the sand discharge pipe extends to the lower end of the support frame and is fixedly connected to the support frame. The sand cleaning roller is equipped with multiple rolling sand cleaning components, which are used to tumble, clean, and recycle the casing. Vibration components are provided between the multiple rolling sand cleaning components and the motor base, and the vibration components are used to vibrate, clean, and recycle the casing.

[0006] Preferably, the rolling sand cleaning assembly includes a connecting groove, the outer wall of the sand cleaning roller is provided with the connecting groove, and the connecting outer cylinder is engaged inside the connecting groove. Multiple evenly distributed connecting openings are provided between the sand cleaning roller and the connecting groove.

[0007] Preferably, the inner end of the connecting opening is provided with a sand guide plate connected to the inner wall of the sand cleaning drum, and the central axis of the sand guide plate is parallel to the central axis of the sand cleaning drum.

[0008] Preferably, a sand discharge groove is provided at the connection between the sand guide plate and the sand cleaning roller at the end away from the sand cleaning motor, and the inner wall of the sand discharge groove and the inner wall of the sand guide plate are located on the same horn surface and communicate with the inside of the sand collection box.

[0009] Preferably, the inner side of the horn surface where the sand discharge trough is located is provided with multiple rotatable shafts that are rotatably connected between the two shaft ends of the sand cleaning drum, and the multiple rotatable shafts are located inside multiple sand guide plates and are distributed in an arc shape.

[0010] Preferably, the multiple tumbling shafts located inside the same sand discharge trough are all connected to a vibrating toothed shaft located outside the sand cleaning drum at the end near the sand cleaning motor, and are distributed in an arc shape.

[0011] Preferably, a plurality of the vibrating gear shafts distributed in an arc shape are fitted with a linkage gear sleeve on the outside and mesh with the inner wall of the linkage gear sleeve. The linkage gear sleeve is connected to a limit shaft at the end near the sand cleaning motor and is connected to the linkage gear shaft located outside the motor base through the limit shaft.

[0012] Preferably, the inner side of the linkage gear shaft is provided with a limiting ring that is rotatably connected to the inner side of the outer wall of the motor base, and the limiting ring is connected to a plurality of limiting seats that are sleeved on the outside of the limiting shaft.

[0013] Preferably, the end of the limiting ring away from the linkage gear sleeve is rotatably connected to a reversing gear via a rotating shaft, and a driving tooth groove is provided on the outer wall of the motor base, with the reversing gear meshing between the driving tooth groove and the linkage gear shaft.

[0014] Preferably, the vibration assembly includes vibration locking holes. Multiple vibration locking holes are provided on the outer side of the inner wall of the linkage tooth sleeve away from the sand cleaning roller, located on the outer side of the vibration tooth shaft. A vibration locking head is slidably connected inside the end of the vibration tooth shaft near the vibration locking holes, and a vibration spring is provided on the end of the vibration locking head away from the vibration locking holes.

[0015] Compared with the prior art, the present invention provides a sand removal and recovery device for the production of complex thin-walled magnesium alloy casings, which has the following beneficial effects: 1. This invention uses multiple rolling sand-cleaning components inside the sand-cleaning drum to tumble and clean the casing, while simultaneously using high-frequency vibration generated by the vibration component to vibrate and clean the casing. This allows the sand-cleaning drum to perform a dual sand-cleaning action on the casing, which can improve the sand-cleaning efficiency for complex thin-walled magnesium alloy casings and prevent the cleaned sand from accumulating inside the sand discharge trough, ensuring that the sand particles can be smoothly recovered.

[0016] 2. The sand-cleaning roller of the present invention is driven by a linkage gear sleeve, a reversing gear, and a drive tooth groove. The linkage gear sleeve can drive the tumbling shaft to rotate in the opposite direction to the sand-cleaning roller. The reverse rotation accelerates the tumbling speed of the casing in the arc-shaped cavity, thereby improving the efficiency of tumbling sand cleaning.

[0017] 3. The linkage tooth sleeve of the present invention can rotate outside the vibrating tooth shaft, so that the vibrating chuck can continuously insert and remove between multiple vibrating chuck holes under the action of the vibrating spring, thereby generating high-frequency vibration. The high-frequency vibration shakes off the stubborn sand particles attached inside the casing, thereby improving the sand cleaning effect and efficiency. At the same time, it shakes the sand particles on the sand guide plate into the sand collection box to avoid accumulation.

[0018] 4. The sand cleaning roller of the present invention is equipped with a sand guide plate inside, the end of which is connected to a trumpet-shaped sand discharge groove and communicates with the sand collection box, so that the sand particles can fall onto the inclined surface of the sand guide plate through the gap of the rolling shaft, and under the dual action of gravity and vibration, they are discharged into the sand collection box through the sand discharge groove, so that the casing and the sand particles can be quickly separated and recovered. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the sand cleaning and recovery device of the present invention.

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the sand-cleaning roller of the present invention.

[0021] Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the sand-cleaning roller of the present invention.

[0022] Figure 4 This is a schematic diagram of the sand discharge trough connection structure of the present invention.

[0023] Figure 5 This is a schematic diagram of the sand guide plate connection structure of the present invention.

[0024] Figure 6 This is a schematic diagram of the vibration gear shaft connection structure of the present invention.

[0025] Figure 7 This is a schematic diagram of the connecting structure of the outer cylinder of the present invention.

[0026] Figure 8 This is a schematic diagram of the vibration gear shaft connection structure of the present invention.

[0027] Figure 9 This is a schematic diagram of the reversing gear connection structure of the present invention.

[0028] Figure 10 For the present invention Figure 8 Enlarged diagram of point A in the middle.

[0029] In the diagram: 1. Support frame; 2. Motor base; 3. Sand cleaning motor; 4. Sand cleaning roller; 5. Connecting outer cylinder; 6. Inlet hopper; 7. Outlet pipe; 8. Sand collection box; 9. Outlet pipe; 10. Connecting slot; 11. Connecting opening; 12. Sand discharge trough; 13. Tilting shaft; 14. Vibrating gear shaft; 15. Linkage gear sleeve; 16. Limiting rotating shaft; 17. Linkage gear shaft; 18. Limiting rotating ring; 19. Limiting rotating seat; 20. Reversing gear; 21. Drive gear groove; 22. Vibration clamping hole; 23. Vibration clamping head; 24. Vibration spring; 25. Sand guide plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides, for example Figures 1-10 The sand removal and recovery device shown is used for the production of complex thin-walled magnesium alloy casings. It includes a support frame 1, with a motor base 2 connected to the upper end of the support frame 1. A sand removal motor 3 is horizontally installed inside the motor base 2. The sand removal motor 3 is electrically connected to an external power supply via a wiring harness. A sand removal roller 4 located on the upper side of the support frame 1 is horizontally connected to the sand removal motor 3 via its output shaft. A connecting outer cylinder 5 is clamped to the outer cylindrical wall of the sand removal roller 4 and rotatably connected to it. An inlet hopper 6 is connected to the upper outer side of the connecting outer cylinder 5, and an outlet pipe 7 is connected to the lower outer side of the connecting outer cylinder 5. The lower opening of the 7 extends to the outside of the lower end of the support frame 1 and is fixedly connected to the support frame 1. The sand cleaning roller 4 is rotatably connected to the sand collection box 8 at the end away from the sand cleaning motor 3, and the lower end of the sand collection box 8 is connected to the sand discharge pipe 9. The lower opening of the sand discharge pipe 9 extends to the outside of the lower end of the support frame 1 and is fixedly connected to the support frame 1. The sand cleaning roller 4 is equipped with multiple rolling sand cleaning components, and the machine casing is tumbled, cleaned, and recycled through the multiple rolling sand cleaning components. Vibration components are provided between the multiple rolling sand cleaning components and the motor base 2, and the machine casing is vibrated, cleaned, and recycled through the vibration components. Alternatively, considering the difficulty of heat-induced collapse of the sand core after casting of complex thin-walled magnesium alloy casings (due to the low casting temperature of magnesium alloys, the heating time of the sand core above 250°C is usually <23 minutes), this device can be adapted to a composite sand cleaning process. A preheating spray module is added at the inlet hopper 6 to pre-treat the casing entering the sand cleaning drum 4. For self-hardening resin sand core casings, a 5.0% concentration of NaOH solution can be sprayed and preheated to 60-80°C to soften the sand core and reduce the difficulty of subsequent sand cleaning; for coated sand core casings, the preheating temperature can be increased to 80-100°C, combined with solution spraying to enhance the sand core peeling effect. The waste liquid after spraying is collected through the guide hole reserved at the bottom of the connecting outer cylinder 5, and recycled after neutralization treatment, which meets the clean production requirements of green manufacturing of magnesium alloys.

[0032] During the sand removal process of casting complex thin-walled magnesium alloy casings, the cast casing is placed inside the inlet hopper 6 and then introduced into the sand removal roller 4 for sand removal and recycling. The casing can be tumbled and cleaned inside the sand removal roller 4 by the rolling sand removal components. The sand removed by the multiple rolling sand removal components is collected and recycled through the sand collection box 8 and finally discharged through the sand outlet pipe 9.

[0033] The number of casings inside the inlet bucket 6 each time will not exceed the capacity of the rolling sand cleaning assembly to prevent the casings from getting stuck between the sand cleaning roller 4 and the connecting outer cylinder 5. The specific capacity needs to be adjusted according to the casing size. Usually, a single rolling sand cleaning assembly can accommodate 1-3 small and medium-sized casings at a time to ensure sufficient space for tumbling and vibration, and to meet the standard for sand cleaning uniformity.

[0034] In addition, while the casing is being cleaned by tumbling inside the rolling sand cleaning assembly, it can also be cleaned by high-frequency vibration generated by the vibration assembly, and the sand inside the sand discharge groove 12 is shaken into the sand collection box 8. This can improve the sand cleaning efficiency of the casing and prevent the cleaned sand from accumulating inside the sand discharge groove 12.

[0035] Optionally, the excitation force of the vibration assembly can be adapted to different sand core types by adjusting the elastic coefficient of the vibration spring 24. For self-hardening resin sand cores, a spring with a medium elastic coefficient is selected, and the excitation force is controlled at 5-8kN to avoid vibrating the thin-walled structure of the casing. For coated sand cores, a spring with a high elastic coefficient is selected, and the excitation force is adjusted to 8-12kN to cooperate with high-frequency vibration to peel off stubborn sand cores. The excitation force must be controlled within 1 / 3 of the casing's yield strength to prevent deformation of the thin-walled structure. At the same time, the vibration clamp 23 is made of cemented carbide with a tungsten carbide coating on the surface, achieving a hardness of over 92HRA and a temperature impact resistance of up to 1200℃. This adapts to the friction and temperature changes during the sand cleaning process, and its service life is 3-5 times longer than that of traditional materials.

[0036] like Figures 3-5As shown, the rolling sand cleaning assembly includes a connecting groove 10. The connecting groove 10 is provided on the outer cylindrical wall of the sand cleaning roller 4, and the connecting outer cylinder 5 is engaged inside the connecting groove 10. Multiple evenly distributed connecting openings 11 are provided between the sand cleaning roller 4 and the connecting groove 10. A sand guide plate 25 connected to the inner wall of the sand cleaning roller 4 is provided at the inner end of the connecting opening 11, and the central axis of the sand guide plate 25 is parallel to the central axis of the sand cleaning roller 4. A sand discharge groove 12 is provided at the connection between the sand guide plate 25 and the end of the sand cleaning roller 4 away from the sand cleaning motor 3. The inner wall of the sand discharge groove 12 and the inner wall of the sand guide plate 25 are located on the same horn surface and are connected to the inside of the sand collection box 8. Multiple rotating connections are provided on the inner side of the horn surface where the sand discharge groove 12 is located. The tumbling shaft 13 between the two ends of the cylinder 4, and multiple tumbling shafts 13 are located inside multiple sand guide plates 25 and are distributed in an arc shape. During the process of tumbling and cleaning the casing, the sand cleaning motor 3 is fixed to the upper end of the support frame 1 through the motor base 2, the connecting outer cylinder 5 is fixed to the upper end of the support frame 1 through the outlet pipe 7, and the sand collection box 8 is fixed to the upper end of the support frame 1 through the sand outlet pipe 9. The sand cleaning motor 3 drives the sand cleaning roller 4, the connecting outer cylinder 5 and the sand collection box 8 to rotate through the output shaft. When the connecting opening 11 rotates to the connection point between the inlet bucket 6 and the connecting outer cylinder 5, the casing inside the inlet bucket 6 falls into the sand guide plate 25 through the connecting opening 11 and falls into the arc-shaped cavity where multiple tumbling shafts 13 are located inside the sand guide plate 25.

[0037] At this time, the sand cleaning roller 4 drives the casing to rotate together through the multiple tumbling shafts 13 inside the sand guide plate 25, so that the casing tumbles inside the arc-shaped cavity where the multiple tumbling shafts 13 are located, thereby cleaning the casing by tumbling. The cleaned sand falls through the gaps between the multiple tumbling shafts 13 onto the trumpet-shaped inner wall of the sand guide plate 25, and falls into the sand collection box 8 through the sand discharge trough 12 for collection, so that the casing is separated from the sand, and finally discharged and recycled through the lower end of the sand discharge pipe 9.

[0038] Furthermore, when the connecting opening 11 rotates to the upper end of the outlet tube 7, the casing falls through the connecting opening 11 into the outlet tube 7 under the action of gravity and is discharged.

[0039] like Figures 6-9As shown, multiple tumbling shafts 13 located inside the same sand discharge trough 12 are connected to vibrating gear shafts 14 located outside the sand cleaning drum 4 at the end near the sand cleaning motor 3, and are distributed in an arc shape. Multiple vibrating gear shafts 14 are fitted with linkage gear sleeves 15, which mesh with the inner wall of the linkage gear sleeves 15. A limiting shaft 16 is connected to the end of the linkage gear sleeve 15 near the sand cleaning motor 3, and a linkage gear shaft 17 located outside the motor base 2 is connected through the limiting shaft 16. A limiting ring 18 is rotatably connected to the inner wall of the motor base 2 on the inner side of the linkage gear shaft 17. Multiple limiting seats 19 are connected to the outside of the limiting ring 18 and fitted outside the limiting shaft 16. A reversing gear 20 is rotatably connected to the end of the limiting ring 18 away from the linkage gear sleeve 15 through a shaft. A drive tooth groove 21 is provided on the outer wall of the motor base 2, and the reversing gear... Wheel 20 meshes between drive tooth groove 21 and linkage tooth shaft 17. During the tumbling and sand-cleaning process of the casing, linkage tooth sleeve 15 is rotatably connected to limit ring 18 through limit rotating shaft 16 and limit rotating seat 19. Limit rotating ring 18 is rotatably connected to the inner wall of the outer wall of motor base 2. At the same time, linkage tooth sleeve 15 is sleeved on the outside of multiple vibrating tooth shafts 14 located on the same arc and meshes with the vibrating tooth shafts 14. Therefore, when the sand-cleaning motor 3 drives the sand-cleaning drum 4 to rotate, the sand-cleaning drum 4 drives the tumbling shaft 13 and the vibrating tooth shaft 14 to rotate together. The vibrating tooth shaft 14 drives the linkage tooth sleeve 15 to rotate around the motor base 2, so that the linkage tooth sleeve 15 can drive the limit rotating ring 18 to rotate inside the outer wall of the motor base 2 through the limit rotating shaft 16 and limit rotating seat 19, and drive the linkage tooth shaft 17 to rotate outside the motor base 2 through the limit rotating shaft 16.

[0040] At this time, since the reversing gear 20 is always located at the inner end of the linkage gear shaft 17 under the drive of the limiting rotating ring 18 and the limiting of the rotating shaft, and meshes between the linkage gear shaft 17 and the drive tooth groove 21, the reversing gear 20 can rotate around the motor base 2 under the drive of the linkage sleeve 15, and can also rotate around its own axis in the same direction as the sand cleaning drum 4 through meshing with the drive tooth groove 21, and can also drive the linkage gear shaft 17 to rotate in the opposite direction through meshing, so that the linkage gear shaft 17 drives the linkage sleeve 15 to rotate around its own axis in the opposite direction to the sand cleaning drum 4.

[0041] Furthermore, while the linkage sleeve 15 rotates around the central axis of the motor base 2 together with the sand-cleaning roller 4, the linkage sleeve 15 can also rotate around its own axis in the opposite direction to the sand-cleaning roller 4. This allows the linkage sleeve 15 to drive the vibrating gear shaft 14 to rotate in the same direction through meshing, and the vibrating gear shaft 14 to drive the tumbling shaft 13 to rotate in the same direction. This causes the tumbling shaft 13 to rotate in the opposite direction to the sand-cleaning roller 4. Thus, when the casing tumbles inside the arc-shaped cavity where the multiple tumbling shafts 13 are located by gravity, the multiple tumbling shafts 13 can accelerate the tumbling speed of the casing by rotating in the opposite direction to the sand-cleaning roller 4, thereby improving the tumbling sand-cleaning efficiency of the casing.

[0042] like Figure 6 , Figure 8 and Figure 10 As shown, the vibration assembly includes vibration locking holes 22. Multiple vibration locking holes 22 are provided on the outer side of the inner wall of the linkage sleeve 15 away from the sand-cleaning roller 4, located outside the vibration gear shaft 14. A vibration locking head 23 is slidably connected inside the end of the vibration gear shaft 14 near the vibration locking holes 22, and a vibration spring 24 is provided at the end of the vibration locking head 23 away from the vibration locking holes 22. While the linkage sleeve 15 drives the vibration gear shaft 14 to rotate in the same direction, the linkage sleeve 15 rotates outside the multiple vibration gear shafts 14 located on the same arc. Because the vibration locking head 23 can be elastically connected to the vibration shaft 14 via the vibration spring 24... Inside the gear shaft 14, and under the action of the vibration spring 24, it can be engaged inside the vibration locking hole 22. Therefore, when the linkage gear sleeve 15 rotates outside the multiple vibration gear shafts 14, the vibration locking head 23 can engage and disengage between the multiple vibration locking holes 22. By engaging and disengaging between the multiple vibration locking holes 22, high-frequency vibration is generated, causing the tumbling shaft 13 and the vibration gear shaft 14 to generate high-frequency vibration, thereby shaking out the stubborn sand attached inside the casing. This not only improves the sand cleaning effect but also improves the sand cleaning efficiency. At the same time, it can shake the sand that falls onto the funnel-shaped inner wall of the sand guide plate 25 into the sand collection box 8 to avoid accumulation.

[0043] The radius of the reversing gear 20 is much larger than that of the linkage gear shaft 17, and the radius of the linkage sleeve 15 is much larger than that of the vibration gear shaft 14. This allows the reversing gear 20 to drive the linkage gear shaft 17 to rotate rapidly, and the linkage sleeve 15 to rotate rapidly outside the vibration gear shaft 14, thereby driving the vibration gear shaft 14 to rotate rapidly. This ensures that the casing can quickly tumble inside the arc-shaped cavity where the multiple tumbling shafts 13 are located, while also ensuring that the vibration gear shaft 14 can generate high-frequency vibration.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sand-recovery device for the production of complex thin-walled magnesium alloy casings, comprising a support frame (1), a motor base (2) connected to the upper end of the support frame (1), and a sand-recovery motor (3) horizontally arranged inside the motor base (2). The sand-recovery motor (3) is horizontally connected to a sand-recovery roller (4) located on the upper side of the support frame (1) via an output shaft. A connecting outer cylinder (5) is snapped onto the outer cylindrical wall of the sand-recovery roller (4) and rotatably connected to the connecting outer cylinder (5). The upper side of the connecting outer cylinder (5) is connected to... The device has an inlet bucket (6) and an outlet pipe (7) connected to the lower side of the outer cylinder (5). The lower end of the outlet pipe (7) extends to the lower end of the support frame (1) and is fixedly connected to the support frame (1). The sand cleaning roller (4) is rotatably connected to a sand collecting box (8) at the end away from the sand cleaning motor (3). The lower end of the sand collecting box (8) is connected to a sand outlet pipe (9). The lower end of the sand outlet pipe (9) extends to the lower end of the support frame (1) and is fixedly connected to the support frame (1). The device is characterized in that: The cleaning roller (4) is equipped with multiple rolling cleaning components, which are used to tumble and clean the casing and recycle the sand. Vibration components are provided between the multiple rolling sand-cleaning components and the motor base (2), and the casing is vibrated and cleaned and recycled through the vibration components.

2. The sand removal and recovery device for the production of complex thin-walled magnesium alloy casings as described in claim 1, characterized in that, The rolling sand cleaning assembly includes a connecting slot (10). The connecting slot (10) is provided on the outer cylindrical wall of the sand cleaning roller (4), and the connecting outer cylinder (5) is engaged inside the connecting slot (10). Multiple evenly distributed connecting openings (11) are provided between the sand cleaning roller (4) and the connecting slot (10).

3. The sand removal and recovery device for the production of complex thin-walled magnesium alloy casings as described in claim 2, characterized in that, The inner end of the connecting opening (11) is provided with a sand guide plate (25) connected to the inner wall of the sand cleaning drum (4), and the central axis of the sand guide plate (25) is parallel to the central axis of the sand cleaning drum (4).

4. The sand removal and recovery device for the production of complex thin-walled magnesium alloy casings as described in claim 3, characterized in that, A sand discharge groove (12) is provided at the connection between the sand guide plate (25) and the sand cleaning roller (4) at the end away from the sand cleaning motor (3). The inner wall of the sand discharge groove (12) and the inner wall of the sand guide plate (25) are located on the same horn surface and are connected to the inside of the sand collection box (8).

5. The sand removal and recovery device for the production of complex thin-walled magnesium alloy casings as described in claim 4, characterized in that, The sand discharge trough (12) is provided with multiple tumbling shafts (13) rotatably connected between the two shaft ends of the sand cleaning roller (4) on the inner side of the horn surface. The multiple tumbling shafts (13) are located inside the multiple sand guide plates (25) and are distributed in an arc shape.

6. The sand removal and recovery device for the production of complex thin-walled magnesium alloy casings as described in claim 5, characterized in that, The multiple tumbling shafts (13) located inside the same sand discharge trough (12) are all connected to a vibrating toothed shaft (14) located outside the sand cleaning drum (4) at the end near the sand cleaning motor (3), and are distributed in an arc shape.

7. The sand removal and recovery device for the production of complex thin-walled magnesium alloy casings as described in claim 6, characterized in that, Multiple vibrating gear shafts (14) arranged in an arc shape are fitted with linkage gear sleeves (15) on the outside and mesh with the inner wall of the linkage gear sleeves (15). The linkage gear sleeves (15) are connected to a limit shaft (16) at one end near the sand cleaning motor (3), and are connected to a linkage gear shaft (17) located outside the motor base (2) through the limit shaft (16).

8. The sand removal and recovery device for the production of complex thin-walled magnesium alloy casings as described in claim 7, characterized in that, The inner side of the linkage gear shaft (17) is provided with a limiting ring (18) that is rotatably connected to the inner side of the outer wall of the motor base (2), and the outer side of the limiting ring (18) is connected with multiple limiting seats (19) that are sleeved on the outer side of the limiting shaft (16).

9. The sand removal and recovery device for the production of complex thin-walled magnesium alloy casings as described in claim 8, characterized in that, The limiting ring (18) is connected to a reversing gear (20) at the end away from the linkage sleeve (15) via a rotating shaft. The outer wall of the motor base (2) is provided with a drive tooth groove (21), and the reversing gear (20) meshes between the drive tooth groove (21) and the linkage gear shaft (17).

10. The sand removal and recovery device for the production of complex thin-walled magnesium alloy casings as described in claim 7, characterized in that, The vibration assembly includes vibration locking holes (22). Multiple vibration locking holes (22) located on the outer side of the inner wall of the linkage tooth sleeve (15) away from the sand cleaning roller (4) are provided. A vibration locking head (23) is slidably connected to the inner side of the vibration tooth shaft (14) near the vibration locking holes (22), and a vibration spring (24) is provided at the inner side of the vibration locking head (23) away from the vibration locking holes (22).

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