Cleaning device of molding sand box for casting

Abstract

The invention discloses a cleaning device of a molding sand box for casting, and mainly relates to the field of casting. Comprising a support used for conveying a sand box, a plurality of idler wheels are rotationally connected to the support, an overturning frame is arranged on the support, an overturning frame used for overturning the sand box is rotationally connected to the overturning frame, a supporting plate aligned to the support is arranged on the overturning frame, and a plurality of idler wheels in rolling contact with the bottom of the sand box are rotationally connected to the supporting plate. A plurality of positioning blocks are slidably connected to the supporting plate in the transverse direction, a cleaning box moving in the vertical direction is arranged below the supporting plate, the cleaning box enters the overturned sand box after moving in the vertical direction, a dustproof plate is arranged in the cleaning box, and a plurality of sand shakeout cones with the upper portions wide and the lower portions narrow are arranged on the dustproof plate. The sand box has the beneficial effects that the technical problems that when residual molding sand in an existing sand box is cleaned, residual molding sand is likely to remain, and the machining environment is likely to be polluted can be solved, the cleaning efficiency and convenience are improved, and the cleanliness of the machining environment is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of casting, in particular to a cleaning device for a molding sand box used for casting. Background Art

[0002] During the casting process, a sand mold is made in a sand box, and then molten iron and other raw materials are poured into it to achieve rapid molding of the casting. After the molded casting is taken out, the sand box needs to be returned to the casting process for use again. At this time, the residual molding sand in the sand box needs to be cleaned up to avoid interference with the subsequent sand mold making. However, since different types of additives are mixed in the molding sand, the molding sand is easily adhered and gathered on the inner wall of the sand box. When cleaning using the existing cleaning method, it is easy to cause residual molding sand. It is necessary to repeatedly clean various positions of the sand box to meet the needs of subsequent processing, which increases the difficulty and workload of cleaning. In addition, the molding sand is easily splashed into the surrounding environment during cleaning, resulting in a waste of molding sand raw materials and affecting the cleanliness of the processing site. Summary of the invention

[0003] The object of the present invention is to provide a cleaning device for a molding sand box for casting, which can solve the technical problems of residual molding sand in the existing sand box being easily left over and easily polluting the processing environment when cleaning, realize closed and comprehensive cleaning of the sand box, reduce the residual amount of molding sand, improve the efficiency and convenience of cleaning, avoid splashing of molding sand into the surrounding environment, avoid waste of molding sand raw materials, and ensure the cleanliness of the processing environment.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A cleaning device for a molding sand box for casting, comprising a bracket for conveying the sand box, a plurality of rollers rotatably connected to the bracket, the rollers rollingly contacting with the bottom of the sand box, a flip frame rotatably connected to the flip frame for flipping the sand box, a support plate aligned with the bracket being provided on the flip frame, a plurality of rollers rollingly contacting with the bottom of the sand box also rotatably connected to the support plate, a plurality of positioning blocks being slidably connected to the upper side of the support plate, the positioning blocks contacting with the side of the sand box, a cleaning box moving vertically is provided below the support plate, the cleaning box moving vertically After moving, it enters the flipped sand box, and a sand falling port is provided on the top of the cleaning box. A rocker arm is symmetrically connected to the cleaning box for rotation. A power shaft for driving the rocker arm to rotate is provided in the cleaning box, and a sliding rod is vertically connected to the rocker arm for sliding movement. A compression spring is provided between the sliding rod and the rocker arm, and a cleaning roller is rotatably connected to the top of the sliding rod. A power assembly for driving the cleaning roller to rotate is provided on the sliding rod, and a cleaning brush is provided on the surface of the cleaning roller. After passing through the sand falling port, the cleaning brush rotates and contacts with the top or side of the sand box, and a dustproof plate is provided in the cleaning box, and a plurality of sand falling cones which are wide at the top and narrow at the bottom are provided on the dustproof plate.

[0006] Furthermore, a cross bar is provided in the cleaning box, the rocker arm is rotatably connected to the cross bar, a torsion spring is provided between the rocker arm and the cross bar, a swing motor is provided on the cross bar, the power shaft is fixed on the output shaft of the swing motor, a push rod is provided on the power shaft, and the push rod is in contact with the rocker arm.

[0007] Furthermore, the end of the push rod is rotatably connected to a contact wheel, the swing rod is provided with a guide groove, and the contact wheel is rollingly connected in the guide groove.

[0008] Furthermore, the power assembly includes a fixing ring, a cleaning motor, and a first gear. The fixing ring is fixed at the end of the sliding rod, the cleaning roller is rotatably connected to the inside of the fixing ring, the cleaning motor is fixed on the sliding rod, and the first gear is respectively arranged on the output shaft of the cleaning motor and the cleaning roller and are meshed with each other.

[0009] Furthermore, the cleaning brush is arranged at an angle near the fixing ring.

[0010] Furthermore, a driving groove is provided on the support plate, a return spring is provided between the positioning block and the side wall of the driving groove, and a cam is provided in the driving groove for driving the positioning block to slide laterally.

[0011] Furthermore, a plurality of rotating shafts are rotatably connected in the driving groove, the cam is fixed on the rotating shaft, the cam is in rotational contact with the side of the positioning block, a positioning motor is provided on the support plate, the output shaft of the positioning motor is fixedly connected to one of the rotating shafts, and a synchronous belt is provided between the plurality of rotating shafts.

[0012] Furthermore, a fixed platform is provided below the cleaning box, a turntable is rotatably connected to the fixed platform, and the cleaning box is arranged on top of the turntable.

[0013] Furthermore, the turntable is provided with a plurality of fixed sleeves, and the bottom of the cleaning box is provided with a plurality of legs, and the legs are vertically slidably connected to the inside of the fixed sleeves, a lifting motor is provided in one of the fixed sleeves, a screw is provided on the output shaft of the lifting motor, a threaded groove is provided inside the leg, and the screw is threadedly connected in the threaded groove.

[0014] Furthermore, a turning motor is provided on the turning frame, and a second gear meshing with each other is provided on the output shaft of the turning motor and the turning frame. A conical bottom shell is provided at the bottom of the cleaning box, and a sand outlet pipe is provided at the bottom of the conical bottom shell.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention provides a turning frame on a bracket for conveying a sand box, and a turning frame for turning the sand box is rotatably connected to the turning frame, and a support plate is provided on the turning frame, and rollers that are rotatably contacted with the bottom of the sand box are rotatably provided on the support plate and the bracket, so that when the sand box passes through the support plate on the turning frame, a plurality of positioning blocks are used to contact the side of the sand box to achieve the limit fixation of the sand box, and then the turning frame rotates along the turning frame, and the sand box is turned over so that its opening faces downward, and then the inside of the sand box can be cleaned, and the cleaning is more convenient, and the cleaned molding sand quickly falls from the downward opening, avoiding the residue of molding sand, and greatly improving the cleaning efficiency and convenience;

[0017] The cleaning roller with a cleaning brush is arranged in the cleaning box, and the cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box. The cleaning roller moves along the sand falling opening to enter the interior of the flipped sand box.

[0018] 3. The swing arm is rotatably connected in the cleaning box, and a sliding rod is vertically slidably connected to the upper edge of the swing arm. A compression spring is arranged between the sliding rod and the swing arm. With such a structure, when the cleaning box enters the flipped sand box, the power shaft drives the swing arm to rotate. Through the sliding connection between the sliding rod and the swing arm, the cleaning roller at the end of the sliding rod can be swung to make rotational contact with various positions on the top and side of the sand box, and then with the setting of the compression spring, the cleaning roller is pressed against the inner wall of the sand box, so that when the cleaning roller drives the cleaning brush to clean the residual molding sand more comprehensively and effectively, it is not easy for the molding sand to remain, the cleaning efficiency is higher, and the cleaning is more thorough, which greatly improves the efficiency and convenience of cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Attached Figure 2 It is a front view of the present invention.

[0021] Attached Figure 3 This invention is attached Figure 2 Cross-sectional view along the AA direction.

[0022] Attached Figure 4 This invention is attached Figure 3 A partial enlarged view of area B in the middle.

[0023] Attached Figure 5 This invention is attached Figure 3 A partial enlarged view of area C in the middle.

[0024] Attached Figure 6 This invention is attached Figure 3 Cross-sectional view along the DD direction.

[0025] Attached Figure 7 This invention is attached Figure 6 Cross-sectional view along the EE direction.

[0026] Attached Figure 8 This invention is attached Figure 6 A partial enlarged view of the F area in the middle.

[0027] Numbers shown in the accompanying drawings:

[0028] 1. Sand box; 2. Bracket; 3. Roller; 4. Turning frame; 5. Turning frame; 6. Support plate; 7. Positioning block; 8. Cleaning box; 9. Sand dropout port; 10. Swing rod; 11. Power shaft; 12. Slide rod; 13. Compression spring; 14. Cleaning roller; 15. Cleaning brush; 16. Dustproof plate; 17. Sand dropout cone; 18. Crossbar; 19. Swing motor; 20. Push rod; 21. Contact wheel; 22. Guide groove; 2 3. Fixed ring; 24. Cleaning motor; 25. First gear; 26. Driving groove; 27. Reset spring; 28. Cam; 29. ​​Rotating shaft; 30. Positioning motor; 31. Synchronous belt; 32. Fixed table; 33. Turntable; 34. Fixed sleeve; 35. Support leg; 36. Lifting motor; 37. Screw; 38. Threaded groove; 39. Flipping motor; 40. Second gear; 41. Conical bottom shell; 42. Sand outlet pipe. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0030] Reference Figure 1 and Figure 2The present invention relates to a cleaning device for a molding sand box 1 for casting. The molding sand box 1 is used to make the shape of a casting using molding sand, and molten iron or the like is poured into the made shape to obtain a casting of a specified shape. The main structure includes a bracket 2 for conveying the sand box 1. The bracket 2 plays a supporting role and is used to transport the sand box 1 so that it can circulate between various molding, pouring, cooling and other equipment. The bracket 2 is rotatably connected to a plurality of rollers 3 through bearings. The rollers 3 are in rolling contact with the bottom of the sand box 1. The rotation of the rollers 3 makes the sand box 1 in rolling contact with the sand box 1 move along the bracket 2. A turning frame 4 is provided on the bracket 2. Preferably, the turning frame 4 is fixed to the bracket 2 by welding or bolts. The turning frame 4 is annular. A turning frame 5 for turning the sand box 1 is rotatably connected to the turning frame 4 through bearings. The rotating frame 5 is also annular, and it rotates around the center of the turning frame 4 under the drive of any existing power structure. The turning frame 5 is fixed with a support plate 6 aligned with the bracket 2 by welding or bolts. The support plate 6 is aligned with the brackets 2 on both sides when horizontal. The support plate 6 is also rotatably connected with a plurality of rollers 3 that are in rolling contact with the bottom of the sand box 1 through bearings. The positions of the rollers 3 on the bracket 2 and the support plate 6 correspond, so that the sand box 1 can enter the turning frame 5 on the turning frame 4 along the bracket 2 for turning and cleaning. After turning, the opening of the sand box 1 is downward, so that the cleaned molding sand can fall quickly and is not easy to stick and gather in the sand box 1 again, making the cleaning more thorough. After cleaning, it is turned in the opposite direction, and then moved from the support plate 6 to the bracket 2 again to return to the processing step, making the whole cleaning process smoother and greatly improving the convenience of cleaning.

[0031] The support plate 6 is laterally slidably connected with a plurality of positioning blocks 7, and the positioning blocks 7 are in contact with the sides of the sand box 1. Such a structure can clamp and position the sand box 1 by the relative sliding of the positioning blocks 7 on both sides when the sand box 1 is flipped, so that the sand box 1 can remain fixed with the support plate 6 when it is flipped, thereby ensuring the stability of the sand box 1 during the subsequent cleaning process. A cleaning box 8 that moves vertically is provided below the support plate 6. The cleaning box 8 is driven by the existing power structure to move up and down vertically. After the cleaning box 8 moves vertically, it enters the flipped sand box 1. Such a structure allows the cleaning box 8 to move vertically into the sand box 1 to seal the downward opening of the sand box 1 when cleaning the inside of the sand box 1. The cleaning box 8 is closed so that the mold sand that falls down after cleaning falls directly into the cleaning box 8, which prevents the mold sand from splashing into the surrounding environment. Under the premise of ensuring the cleaning effect, the environmental pollution and waste of raw materials caused by the splashing of the mold sand are avoided, and the cleanliness of the processing environment is ensured. The top of the cleaning box 8 is provided with a sand outlet 9, and the fallen mold sand passes through the sand outlet 9 and enters the interior of the cleaning box 8. The setting of the sand outlet 9 makes the cleaning box 8 have an open top structure. The cleaning box 8 is symmetrically connected with a swing rod 10 through a pin shaft or a hinge for rotation. The cleaning box 8 is provided with a power shaft 11 for driving the swing rod 10 to rotate. The power shaft 11 is used to drive the swing rod 10 to reciprocate. The upper edge of the swing rod 10 is vertically slidably connected with a slide rod 12, and a compression spring 1 is provided between the slide rod 12 and the swing rod 10. 3. Such a structure enables the slide bar 12 to rotate relative to the swing bar 10. The top of the slide bar 12 is rotatably connected to a cleaning roller 14 through a bearing. The slide bar 12 is provided with a power assembly for driving the cleaning roller 14 to rotate. The surface of the cleaning roller 14 is provided with a cleaning brush 15. The cleaning brush 15 is generally made of nylon or plastic. With such a structure, after the cleaning box 8 enters the sand box 1, the swing bar 10 rotates to allow the cleaning roller 14 to face various positions inside the sand box 1, thereby cleaning various positions. The cleaning is more comprehensive and it is less likely to have residual molding sand. Combined with the structure of the compression spring 13, the cleaning roller 14 on the top of the slide bar 12 is pressed against the inner wall of the sand box 1, making it easier and more thorough to clean the bonded molding sand. After passing through the sand falling opening 9, the cleaning brush 15 rotates and contacts with the top or side of the sand box 1, and the cleaning roller 14 with the cleaning brush 15 is driven to rotate by the power assembly to effectively clean the residual molding sand on the inner wall of the sand box 1. The cleaning roller 14 can preferably be two pairs, which clean the front and rear side walls and the left and right side walls of the sand box 1 respectively. Both pairs of cleaning rollers 14 can clean the top of the sand box 1 after turning over, ensuring the comprehensiveness of the cleaning. When cleaning the front and rear side walls or the left and right side walls, the swing arm 10 rotates to make the cleaning brush 15 contact the side walls, and then the cleaning box 8 moves downward, so that the cleaning brush 15 can completely clean the side of the sand box 1 vertically. A dustproof plate 16 is fixed in the cleaning box 8 by welding or bolts, and the dustproof plate 16 is arranged horizontally.In order to prevent the molding sand gathered at the bottom from being lifted up or splashing to the outside of the cleaning box 8, the dustproof plate 16 is provided with a plurality of sand-falling cones 17 which are wide at the top and narrow at the bottom. The sand-falling cones 17 are hollow cone-shaped structures which are connected from top to bottom. The wider top makes it easier for the fallen molding sand to pass through and fall to the bottom of the cleaning box 8, while the narrower bottom of the sand-falling cones 17 makes it difficult for the molding sand that falls at the bottom to splash back to the outside of the cleaning box 8, so that the cleaning process of the sand box 1 takes place completely in a relatively closed space, avoiding the waste of raw materials and environmental pollution caused by the splashing of molding sand, and ensuring the cleanliness of the processing environment.

[0032] Preferably, refer to Figure 6 and Figure 8 A cross bar 18 is fixed in the cleaning box 8 by welding or bolts, and the swing rod 10 is rotatably connected to the cross bar 18 by a pin or a hinge. A torsion spring is provided between the swing rod 10 and the cross bar 18. The torsion spring is not marked in the drawings of the present invention. When the swing rod 10 rotates relative to the cross bar 18, the torsion spring is stretched to generate an elastic force for the swing rod 10 to rotate and reset in the opposite direction. A swing motor 19 is fixed on the cross bar 18 by welding or bolts, and the power shaft 11 is fixed to the output shaft of the swing motor 19 by welding or a coupling. A push rod 20 is fixed on the power shaft 11 by welding or bolts, and the push rod 20 is in contact with the rocker arm 10. With such a structure, when the swing motor 19 drives the power shaft 11 to rotate, the push rod 20 on the power shaft 11 contacts the rocker arm 10 and pushes the rocker arm 10 to rotate to stretch the torsion spring, thereby realizing the rotation drive of the rocker arm 10. When the power shaft 11 rotates in the opposite direction, the push rod 20 returns, and under the action of the torsion spring, the rocker arm 10 rotates in the opposite direction and resets, so that the swing rotation of the rocker arm 10 in all directions is smoother and more efficient.

[0033] Preferably, the end of the push rod 20 is rotatably connected to a contact wheel 21 via a bearing, and a guide groove 22 is provided on the rocker arm 10, which is recessed inward from one side of the rocker arm 10, and the contact wheel 21 is rollingly connected in the guide groove 22, and the guide groove 22 guides the relative rotation of the contact wheel 21. Such a structure allows the push rod 20 to make rolling contact with the rocker arm 10 through the contact wheel 21 when in contact with the rocker arm 10, and then when the push rod 20 drives the rocker arm 10 to rotate, the relative motion between the two is a rolling motion, which reduces the friction at the contact position, and makes the swinging and rotating drive of the rocker arm 10 smoother and more stable.

[0034] Preferably, refer to Figure 3 and Figure 5The power assembly includes a fixing ring 23, a cleaning motor 24, and a first gear 25. The fixing ring 23 is fixed to the end of the slide bar 12 by welding or integral molding. The cleaning roller 14 is rotatably connected to the inside of the fixing ring 23 through a bearing. The cleaning motor 24 is fixed to the slide bar 12 by welding or bolts. The first gear 25 is respectively arranged on the output shaft of the cleaning motor 24 and the cleaning roller 14 by welding or bolts and are meshed with each other. When the cleaning motor 24 is started, such a structure enables the cleaning roller 14 to rotate around the inside of the fixing ring 23 under the connection of the two meshing first gears 25, thereby realizing the continuous rotation of the cleaning roller 14, and utilizing the cleaning brush 15 on the cleaning roller 14 to quickly rotate and clean the inside of the sand box 1, so that the cleaning speed is faster, and the cleaning is cleaner and more thorough.

[0035] Preferably, the cleaning brush 15 is arranged at an angle near the fixing ring 23. The inclined cleaning brush 15 can avoid the fixing ring 23 and the nearby cleaning motor 24 and the first gear 25 and be located outside these components, so that the cleaning brush 15 completely covers the surface area of ​​the cleaning roller 14. When the cleaning roller 14 drives the cleaning brush 15 to rotate, the cleaning brush 15 can be in more comprehensive and close contact with the inner wall of the sand box 1 in contact, and there is no dead angle for cleaning, which further improves the comprehensiveness of cleaning and makes the cleaning of the molding sand more thorough.

[0036] Preferably, refer to Figure 3 and Figure 4 The support plate 6 is provided with a driving groove 26, and the driving groove 26 is recessed inwardly from the side of the support plate 6 close to the sand box 1. A return spring 27 is provided between the positioning block 7 and the side wall of the driving groove 26. A cam 28 is provided in the driving groove 26 for driving the positioning block 7 to slide laterally. When the short axis of the cam 28 contacts the positioning block 7, the positioning block 7 is away from the sand box 1 under the action of the return spring 27, ensuring that the sand box 1 is smoothly transported backward on the support plate 6. When the cam 28 rotates so that the long axis contacts the positioning block 7, the positioning block 7 is driven to slide toward the side of the sand box 1 and contact it, stretching the return spring 27, and contacting and clamping the two sides of the sand box 1, thereby ensuring the firmness of the sand box 1 and the support plate 6 during the flipping process. After flipping again, the cam 28 rotates in the opposite direction. Under the action of the return spring 27, the positioning block 7 automatically slides and resets to disengage from the side wall of the sand box 1, making the fixing and separation of the positioning block 7 and the sand box 1 smoother and more efficient.

[0037] Preferably, a plurality of rotating shafts 29 are rotatably connected in the driving groove 26 through bearings, the cam 28 is welded or bolted to the rotating shaft 29, the cam 28 is in rotational contact with the side of the positioning block 7, a positioning motor 30 is welded or bolted to the support plate 6, the output shaft of the positioning motor 30 is fixedly connected to one of the rotating shafts 29 by welding or a coupling, and a synchronous belt 31 is provided between the plurality of rotating shafts 29. Such a structure only requires one positioning motor 30 to simultaneously drive the plurality of rotating shafts 29 to rotate under the connection of the synchronous belt 31, so that the cams 28 on the plurality of rotating shafts 29 drive the positioning blocks 7 to slide to clamp and fix the sand box 1, thereby simplifying the complexity of the driving structure, making the device setting more reasonable, the sliding of each positioning block 7 more synchronous, and the clamping and fixing effect of the sand box 1 better.

[0038] Preferably, a fixed platform 32 is provided below the cleaning box 8, and a turntable 33 is rotatably connected to the fixed platform 32 via a bearing. The cleaning box 8 is arranged on the top of the turntable 33. Such a structure allows the rocker arm 10 to be provided as only one pair. After the top and left and right sides of the sand box 1 are cleaned, the turntable 33 drives the cleaning box 8 to rotate, so that the rocker arm 10 rotates to the front and rear sides of the sand box 1, thereby realizing rapid cleaning of the front and rear side walls. This is suitable for use when the cross-section of the sand box 1 is square, further simplifies the complexity of the device, and ensures the convenience of cleaning.

[0039] Preferably, refer to Figure 7 A plurality of fixing sleeves 34 are welded or bolted on the turntable 33, and a plurality of legs 35 are welded or integrally formed and fixed on the bottom of the cleaning box 8. The legs 35 are vertically slidably connected to the inside of the fixing sleeve 34, and the cleaning box 8 is driven up and down by the up and down sliding of the legs 35 relative to the fixing sleeve 34. A lifting motor 36 is welded or bolted in one of the fixing sleeves 34, and a screw 37 is fixed on the output shaft of the lifting motor 36 by welding or a coupling. A thread groove 38 is provided in the inside of the leg 35, and the screw 37 is threadedly connected in the thread groove 38. The lifting motor 36 drives the screw 37 to rotate, and drives the legs 35 to slide up and down in the fixing sleeve 34 under the action of the threaded connection, thereby making the vertical movement of the cleaning box 8 smoother and more efficient.

[0040] Preferably, a turning motor 39 is welded or bolted to the turning frame 4, and a second gear 40 meshing with each other is welded or bolted to the output shaft of the turning motor 39 and the turning frame 5. When the turning motor 39 is started, the turning frame 5 is driven to rotate under the connection of the two meshing second gears 40, so that the turning drive of the sand box 1 is faster and more efficient. A conical bottom shell 41 is welded or integrally formed and fixed to the bottom of the cleaning box 8. The conical bottom shell 41 is wide at the top and narrow at the bottom. A sand outlet pipe 42 is provided at the bottom of the conical bottom shell 41. Such a structure allows the molding sand that falls to the bottom to be more concentrated at the bottom of the conical bottom shell 41. When the switch on the sand outlet pipe 42 is turned on, the molding sand can be discharged more thoroughly, which is convenient for collecting and reusing the molding sand.

[0041] Working principle: the present invention provides a turning frame 4 on a bracket 2 for conveying a sand box 1, a turning frame 5 for turning the sand box 1 is rotatably connected to the turning frame 4, a support plate 6 is provided on the turning frame 5, and rollers 3 for turning in contact with the bottom of the sand box 1 are rotatably provided on the support plate 6 and the bracket 2. Such a configuration enables the sand box 1 to be fixed in position by contacting the side of the sand box 1 with a plurality of positioning blocks 7 when the sand box 1 passes through the support plate 6 on the turning frame 5, and then the turning frame 5 rotates along the turning frame 4, and the sand box 1 is turned over so that its opening faces downward, after which the inside of the sand box 1 can be cleaned, and the cleaning is more convenient. The cleaning roller 14 with a cleaning brush 15 is provided in the cleaning box 8. ...1. The cleaning roller 14 with a cleaning brush 15 is provided in the cleaning box 1. The cleaning roller 14 with a cleaning brush 15 is provided in the cleaning box 1. The residual molding sand on the top and sides is brushed off, and the molding sand that falls after cleaning passes through the sand falling port 9 and falls into the interior of the cleaning box 8. When the molding sand falls, it passes through the sand falling cone 17 on the dustproof plate 16 and falls into the bottom of the cleaning box 8. The sand falling cone 17 is in a shape that is wide at the top and narrow at the bottom, so that the molding sand is easier to fall and is not easy to splash back and form dust, so that the molding sand is not easy to splash from the cleaning box 8, which avoids the splashing of molding sand into the surrounding processing environment, reduces the waste of molding sand raw materials, and ensures the cleanliness of the processing site; the swing rod 10 is rotatably connected in the cleaning box 8, and the upper edge of the swing rod 10 is vertically slidably connected with a slide rod 12, and a pressure is arranged between the slide rod 12 and the swing rod 10. The compression spring 13 has such a structure that when the cleaning box 8 enters the inside of the flipped sand box 1, the power shaft 11 drives the rocker arm 10 to rotate. Through the sliding connection between the slide bar 12 and the rocker arm 10, the cleaning roller 14 at the end of the slide bar 12 can be swung to rotate and contact with various positions on the top and side of the sand box 1, and then the setting of the compression spring 13 makes the cleaning roller 14 pressed against the inner wall of the sand box 1, and then when the cleaning roller 14 drives the cleaning brush 15 to clean the residual molding sand more comprehensively and effectively, it makes it difficult for the molding sand to remain, the cleaning efficiency is higher, and the cleaning is more thorough, which greatly improves the efficiency and convenience of cleaning.

Claims

1. A cleaning device for a molding sand box for casting, comprising a bracket (2) for conveying a sand box (1), a plurality of rollers (3) being rotatably connected to the bracket (2), the rollers (3) being in rolling contact with the bottom of the sand box (1), characterized in that: The support (2) is provided with a turning frame (4), and a turning frame (5) for turning over the sand box (1) is rotatably connected to the turning frame (4), and a support plate (6) aligned with the support (2) is provided on the turning frame (5), and a plurality of rollers (3) in rolling contact with the bottom of the sand box (1) are also rotatably connected to the support plate (6), and a plurality of positioning blocks (7) are slidably connected to the support plate (6) in a transverse direction, and the positioning blocks (7) are in contact with the side surfaces of the sand box (1), and a cleaning box (8) moving vertically is provided below the support plate (6), and the cleaning box (8) enters the interior of the turned sand box (1) after moving vertically, and a sand falling opening (9) is provided on the top of the cleaning box (8), and a symmetrical rotating opening (9) in the cleaning box (8) is provided. The cleaning box (8) is rotatably connected with a swing rod (10), a power shaft (11) for driving the swing rod (10) to rotate is arranged in the cleaning box (8), a slide rod (12) is vertically slidably connected to the swing rod (10), a compression spring (13) is arranged between the slide rod (12) and the swing rod (10), a cleaning roller (14) is rotatably connected to the top of the slide rod (12), a power assembly for driving the cleaning roller (14) to rotate is arranged on the slide rod (12), a cleaning brush (15) is arranged on the surface of the cleaning roller (14), the cleaning brush (15) passes through the sand falling opening (9) and then rotates and contacts with the top or side of the sand box (1), a dustproof plate (16) is arranged in the cleaning box (8), and a plurality of sand falling cones (17) which are wide at the top and narrow at the bottom are arranged on the dustproof plate (16).

2. A cleaning device for a molding sand box for casting according to claim 1, characterized in that: A cross bar (18) is arranged in the cleaning box (8), the swing rod (10) is rotatably connected to the cross bar (18), a torsion spring is arranged between the swing rod (10) and the cross bar (18), a swing motor (19) is arranged on the cross bar (18), the power shaft (11) is fixed on the output shaft of the swing motor (19), a push rod (20) is arranged on the power shaft (11), and the push rod (20) is in contact with the swing rod (10).

3. A cleaning device for a molding sand box for casting according to claim 2, characterized in that: The end of the push rod (20) is rotatably connected to a contact wheel (21), the swing rod (10) is provided with a guide groove (22), and the contact wheel (21) is rollingly connected in the guide groove (22).

4. A cleaning device for a molding sand box for casting according to claim 1, characterized in that: The power assembly comprises a fixing ring (23), a cleaning motor (24), and a first gear (25); the fixing ring (23) is fixed to the end of the slide bar (12); the cleaning roller (14) is rotatably connected to the inside of the fixing ring (23); the cleaning motor (24) is fixed to the slide bar (12); and the first gear (25) is respectively arranged on the output shaft of the cleaning motor (24) and the cleaning roller (14) and is meshedly connected to each other.

5. A cleaning device for a molding sand box for casting according to claim 4, characterized in that: The cleaning brush (15) is arranged obliquely at a position close to the fixing ring (23).

6. A cleaning device for a molding sand box for casting according to claim 1, characterized in that: The support plate (6) is provided with a driving groove (26), a return spring (27) is provided between the positioning block (7) and the side wall of the driving groove (26), and a cam (28) is provided in the driving groove (26) for driving the positioning block (7) to slide in a transverse direction.

7. A cleaning device for a molding sand box for casting according to claim 6, characterized in that: A plurality of rotating shafts (29) are rotatably connected in the driving groove (26), the cam (28) is fixed on the rotating shaft (29), the cam (28) is in rotational contact with the side surface of the positioning block (7), a positioning motor (30) is provided on the support plate (6), the output shaft of the positioning motor (30) is fixedly connected to one of the rotating shafts (29), and a synchronous belt (31) is provided between the plurality of rotating shafts (29).

8. The cleaning device for a molding sand box for casting according to claim 1, characterized in that: A fixed platform (32) is provided below the cleaning box (8), a turntable (33) is rotatably connected to the fixed platform (32), and the cleaning box (8) is arranged on the top of the turntable (33).

9. A cleaning device for a molding sand box for casting according to claim 8, characterized in that: The turntable (33) is provided with a plurality of fixing sleeves (34), the bottom of the cleaning box (8) is provided with a plurality of legs (35), the legs (35) are vertically slidably connected inside the fixing sleeves (34), a lifting motor (36) is provided inside one of the fixing sleeves (34), a screw (37) is provided on the output shaft of the lifting motor (36), a thread groove (38) is provided inside the legs (35), and the screw (37) is threadedly connected in the thread groove (38).

10. The cleaning device for a molding sand box for casting according to claim 1, characterized in that: The turning frame (4) is provided with a turning motor (39), the output shaft of the turning motor (39) and the turning frame (5) are both provided with a second gear (40) meshing with each other, the bottom of the cleaning box (8) is provided with a conical bottom shell (41), and the bottom of the conical bottom shell (41) is provided with a sand outlet pipe (42).

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