Automatic slicking device for molding sand on surface of sand box

Abstract

An automatic slicking device for molding sand on the surface of a sand box belongs to the technical field of sand mold casting and comprises a rack, a lifting mechanism mounted at the top of the rack, guide rail assemblies fixedly mounted at the bottom of the lifting mechanism and extending in the length direction of the sand box, and a slicking mechanism arranged between the two guide rail assemblies. The two ends of the slicking mechanism are in rolling connection with the guide rail assembly through rollers, a rack is fixedly arranged at the bottom of the guide rail assembly in the length direction of the guide rail assembly, the driving assembly is installed on the slicking mechanism and engaged with the rack through a gear, and the compaction detection mechanism is installed on the front side of the slicking mechanism in the advancing direction. The scraping mechanism can meet the scraping requirements of sand boxes with different heights due to the arrangement of the lifting mechanism, the overall adaptability is high, the positioning precision of descending of the scraping mechanism can be improved due to the arrangement of the compaction detection mechanism, manual adjustment is not needed, the positioning precision is high, the scraping effect is good, the automation degree is high, and the labor intensity is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sand mold casting, in particular to an automatic scraping device for molding sand on the surface of a sand box. Background Art

[0002] The self-hardening sand molding production line uses a sand mixer to add sand. After adding sand, the molding sand will be higher than the surface of the sand box. The molding sand higher than the surface of the sand box is called waste sand and must be cleaned up. Otherwise, the uneven surface of the sand box at the demolding point will cause damage to the shape of the sand mold after demolding. Therefore, the current process requires that the molding sand on the surface of the sand box must be scraped flat after adding sand to ensure that the shape of the sand mold after demolding is intact.

[0003] At present, the molding sand on the surface of the sand box is mostly scraped flat manually. In order to reduce labor intensity and improve work efficiency, an automatic scraping and compacting device (such as publication number CN213916007U) has appeared. A U-frame is installed on a traveling trolley, and a gravity roller is installed on the U-frame and pressed on the upper surface of the frame of the wooden mold; the drag roller is hinged on two hinged plates, and the two hinged plates are respectively fixed on the left and right sides of the traveling trolley, and the scraper is fixed on the traveling trolley. The molding sand on the surface of the wooden mold is dragged and scraped flat by the traveling trolley, and then compacted, which is completed automatically by machinery.

[0004] Although the existing sand scraping and compacting device can automatically perform sand scraping and compacting work, its overall adaptability is poor due to the limited track height. It cannot meet the scraping and leveling requirements of sand boxes of different heights. It is necessary to manually select and replace the track of appropriate height according to the sand boxes of different heights, and the walking trolley needs to be installed on the corresponding track. The installation and replacement process of the track and the trolley is complicated, the labor intensity is high and it is inconvenient to use. Utility Model Content

[0005] In order to solve the technical problems of poor adaptability and inconvenience in use of the existing sand scraping and compacting devices in the above-mentioned background technology, the utility model provides an automatic sand scraping and leveling device on the surface of a sand box.

[0006] The technical solution of this utility model is as follows:

[0007] The utility model provides an automatic scraping device for molding sand on the surface of a sand box, comprising: a frame, a lifting mechanism is installed on the top of the frame, and a scraping driving mechanism is installed on the bottom of the lifting mechanism, the scraping driving mechanism comprises a driving assembly and two relatively arranged guide rail assemblies, the guide rail assembly is fixedly installed at the bottom of the lifting mechanism, the guide rail assembly extends along the length direction of the sand box, a scraping mechanism is arranged between the two guide rail assemblies, both ends of the scraping mechanism are rollingly connected with the guide rail assembly through rollers, a rack is fixedly provided along the length direction of the guide rail assembly at the bottom, the driving assembly is installed on the scraping mechanism, the driving assembly is meshed with the rack through a gear, the scraping mechanism comprises a scraper extending along the width direction of the sand box, a compaction detection mechanism is installed on the front side of the traveling direction of the scraping mechanism, the setting of the lifting mechanism enables the scraping mechanism to adapt to the scraping needs of sand boxes of different heights, and the overall adaptability is strong, the setting of the compaction detection mechanism can improve the positioning accuracy of the scraping mechanism descent, no manual adjustment is required, the positioning accuracy is high, the scraping effect is good, and the degree of automation is high, which effectively reduces the labor intensity.

[0008] Preferably, the rack includes a plurality of vertically arranged guide rail columns, the tops of the plurality of guide rail columns are fixedly connected by a connecting frame, and guide rails are arranged on the inner sides of the guide rail columns.

[0009] Preferably, the lifting mechanism includes a driving cylinder, which is vertically installed on a connecting frame. A lifting frame is provided below the driving cylinder. The cylinder rod of the driving cylinder is fixedly connected to the lifting frame. A plurality of first rollers are rotatably provided on both sides of the lifting frame. The first rollers are rollingly connected to the guide rails on the guide rail columns. Through the cooperation of the first rollers and the guide rail columns, the stability of the lifting mechanism during the lifting process can be effectively improved.

[0010] Preferably, the guide rail assembly is fixedly arranged at the bottom of the lifting frame, thereby ensuring the synchronous lifting and lowering of the scraping drive mechanism and the lifting mechanism.

[0011] Preferably, a scraper frame is provided above the scraper, and the scraper is fixedly connected to the scraper frame through a connecting rod. A plurality of second rollers are rotatably provided on both sides of the scraper frame. The second rollers are rollingly connected to the guide rails on the guide rail assembly. The driving assembly is installed on the connecting rod. The scraper can move along the rack under the drive of the driving assembly, thereby realizing a scraping action. The cooperation between the second rollers and the guide rail assembly effectively improves the stability of the scraper operation.

[0012] Preferably, the driving assembly includes a transmission shaft driven by a motor, with gears fixed at both ends of the transmission shaft. The two ends of the transmission shaft are meshed with racks on both sides through gears, and the transmission shaft is rotatably set on a connecting rod, thereby ensuring the synchronous movement of the two ends of the transmission shaft and avoiding the offset and tilting phenomenon during the horizontal movement of the scraper.

[0013] Preferably, a mounting seat is fixedly provided on the connecting rod, a bearing is provided in the mounting seat, and the transmission shaft is rotatably installed in the mounting seat, so that the transmission shaft can rotate while achieving the purpose of driving the scraping mechanism to move as a whole.

[0014] Preferably, the compaction detection mechanism includes a guide column fixedly mounted on a sand scraper frame and a detection unit. The guide column is a telescopic structure and is vertically arranged. A knife plate is connected below the guide column. A blade is provided at the bottom of the knife plate along its length. The arrangement of the blade facilitates the knife plate to split the molding sand, reduces the obstruction of the molding sand, and ensures the detection accuracy.

[0015] Preferably, the knife-shaped plate is lower than the scraper plate, and the height difference between the knife-shaped plate and the scraper plate is the same as the upward moving distance of the knife-shaped plate, which effectively ensures the positioning accuracy of the scraper plate.

[0016] Preferably, it also includes a control center, which is connected to the lifting mechanism, the driving assembly and the compaction detection mechanism, thereby improving the automation level of the scraping device, reducing labor intensity and facilitating use.

[0017] It can be seen from the above technical solutions that the advantages of the utility model are:

[0018] 1. The lifting mechanism can drive the scraping mechanism to rise and fall, so that the scraping mechanism can adapt to the scraping needs of sand boxes of different heights. The overall adaptability is strong. The setting of the compaction detection mechanism can improve the positioning accuracy of the scraping mechanism when it descends. No manual adjustment is required. The positioning accuracy is high, the scraping effect is good, and the degree of automation is high, which effectively reduces the labor intensity.

[0019] 2. The compaction detection mechanism includes a knife-shaped plate. A blade is provided at the bottom of the knife-shaped plate along its length. The setting of the blade makes it easier for the knife-shaped plate to split the molding sand, reduces the obstruction of the molding sand, and ensures the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the main structure of the automatic scraping device according to one or more embodiments of the utility model;

[0022] Figure 2 It is a side view structural schematic diagram of an automatic scraping device according to one or more embodiments of the utility model;

[0023] Figure 3It is a schematic diagram of the structure of a rack according to one or more embodiments of the present invention;

[0024] Figure 4 It is a structural schematic diagram of a lifting mechanism according to one or more embodiments of the utility model;

[0025] Figure 5 It is a structural schematic diagram of a scraping mechanism according to one or more embodiments of the utility model;

[0026] Figure 6 It is a structural schematic diagram of a scraping drive mechanism according to one or more embodiments of the utility model;

[0027] Figure 7 It is a structural schematic diagram of a compaction detection mechanism according to one or more embodiments of the present utility model;

[0028] The components represented by the reference numerals in the figure are:

[0029] 1. Frame; 2. Lifting mechanism; 3. Scraping mechanism; 4. Scraping drive mechanism; 5. Compacting detection mechanism; 6. Guide rail column; 7. Connecting frame; 8. Driving cylinder; 9. Lifting frame; 10. First roller; 11. Scraping frame; 12. Second roller; 13. Scraper; 14. Guide rail assembly; 15. Motor; 16. Transmission shaft; 17. Gear; 18. Rack; 19. Knife plate; 20. Guide column; 21. Detection unit; 22. Sand box. DETAILED DESCRIPTION

[0030] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0031] In a typical implementation of the present invention, Figure 1-Figure 7 As shown, an automatic scraping device for molding sand on the surface of a sand box is proposed, comprising: a frame 1, a lifting mechanism 2, a scraping mechanism 3, a scraping drive mechanism 4 and a compaction detection mechanism 5. The frame 1 is a frame-type frame, the lifting mechanism 2 is installed on the top of the frame 1, and is mainly used to drive the lifting and lowering of the scraping mechanism 3. The scraping mechanism 3 is installed below the lifting mechanism 2, and the scraping drive mechanism 4 is also installed below the lifting mechanism 2. The scraping drive mechanism 4 can be lifted and lowered synchronously with the scraping mechanism 2 under the drive of the lifting mechanism 2, and the scraping drive mechanism 4 is connected to the scraping mechanism 3, and can drive the scraping mechanism 3 to move horizontally. The compaction detection mechanism 5 is installed on the front side of the scraping mechanism 3 in the direction of travel.

[0032] like Figure 3 The frame 1 includes guide rail columns 6 and a connecting frame 7. The guide rail columns 6 are vertically arranged. There are two groups of guide rail columns 6. The two groups of guide rail columns 6 are arranged opposite to each other. The tops of the two groups of guide rail columns 6 are fixedly connected by a horizontally arranged connecting frame 7. The inner side of the guide rail columns 6 (that is, the side where the two groups of guide rail columns 6 are close to each other) is provided with a guide rail. The lifting mechanism 2 is arranged between the two groups of guide rail columns 6, and the two ends of the lifting mechanism 2 are connected to the guide rails on the adjacent guide rail columns 6 through the first roller 10 to play a guiding role and improve the stability of the lifting mechanism 2 during the lifting process.

[0033] like Figure 4 As shown, the lifting mechanism 2 includes a driving cylinder 8 and a lifting frame 9. The driving cylinder 8 is vertically arranged and hingedly mounted on the connecting frame 7. The lifting frame 9 is located below the driving cylinder 8. The cylinder rod of the driving cylinder 8 is fixedly connected to the lifting frame 9 below it. The lifting frame 9 is located between two guide rail columns 6. A plurality of first rollers 10 are rotatably provided on both sides of the lifting frame 9. Both sides of the lifting frame 9 are rollingly connected to the adjacent guide rail columns 6 through the first rollers 10. The first rollers 10 are rollingly arranged on the guide rails of the adjacent guide rail columns 6 and are rolled under the guidance of the first rollers 10.

[0034] The lifting frame 9 may be a frame structure or a transversely arranged plate structure, and the specific structure may be determined according to actual design requirements, and no excessive restrictions are imposed here.

[0035] The scraping mechanism 3 and the scraping drive mechanism 4 are both mounted on the lifting frame 9, so that the scraping mechanism 3 and the scraping drive mechanism 4 follow the lifting frame 9 to perform synchronous lifting and lowering movements driven by the driving cylinder 8. Figure 5 As shown, the scraping mechanism 3 includes a scraping frame 11 and a scraper 13. The scraper 13 is located directly below the scraping frame 11. The scraper 13 is fixedly connected to the scraping frame 11 by a plurality of connecting rods. The length of the scraper 13 is much larger than the scraping frame 11. Specifically, the scraping frame 11 is horizontally arranged between two sets of guide rail columns 6. The bottom of the scraping frame 11 is fixedly provided with a plurality of connecting rods at intervals along its length direction. The bottom of the connecting rod is detachably connected to the scraper 13 by bolt connection or the like. The scraper 13 is parallel to the scraping frame 11. The scraper 13 extends along the width direction of the sand box 22, and the length of the scraper 13 is greater than the width of the sand box 22. A mounting seat is fixedly installed on each connecting rod, and a plurality of second rollers 12 are rotatably provided on both sides of the scraping frame 11.

[0036] like Figure 6As shown, the scraping drive mechanism 4 includes a guide rail assembly 14, a drive assembly and a rack 18, wherein two guide rail assemblies 14 are provided, the two guide rail assemblies 14 are extended along the travel direction of the scraper 13, and the two guide rail assemblies 14 are arranged opposite to each other, and the second rollers 12 on both sides of the scraping frame 11 are respectively connected to the adjacent guide rail assemblies 14. Specifically, the scraping frame 11 is located between the two guide rail assemblies 14, and the guide rail assembly 14 includes a fixed frame and a guide rail. The fixed frame is fixedly arranged at the bottom of the lifting frame 9 by welding, and the guide rail is welded and fixed to the inner side of the fixed frame (that is, the side where the two fixed frames are close to each other), and the guide rail extends along the length direction of the sand box 22, and the second roller 12 is rollingly arranged in the guide rail inside the fixed frame, so that the guide rail is used to support and guide the second roller 12.

[0037] A rack 18 is fixedly provided at the bottom of each fixing frame, and the rack 18 is arranged along the length direction of the fixing frame. The driving assembly is installed on the scraping mechanism, and the driving assembly includes a motor 15, a transmission shaft 16 and a gear 17. The transmission shaft 16 is located below the two guide rail assemblies 14, and the transmission shaft 16 is arranged horizontally, and a gear 17 is fixedly installed at both ends of the transmission shaft 16. The two ends of the transmission shaft 16 are meshed with the rack 18 at the bottom of the adjacent fixing frame through the gear 17. The transmission shaft 16 is also connected to the motor 15, so that it can be 5 drives the transmission shaft 16 to rotate, the transmission shaft 16 is rotatably arranged in the mounting seat on the connecting rod of the scraping mechanism 3, and a bearing is arranged in the mounting seat, so that the transmission shaft 16 is rotatably connected with the connecting rod, the motor 15 can drive the transmission shaft 16 to rotate around the axis, and the transmission shaft 16 drives the gears 17 at both ends to rotate, and then under the cooperation of the gear 17 and the rack 18, the transmission shaft 16 reciprocates along the rack 18, and at the same time, the transmission shaft 16 drives the scraping mechanism 3 to reciprocate along the rack 18 as a whole, so as to realize the automatic scraping action.

[0038] The compaction detection mechanism 5 is installed on the front side of the scraping mechanism 3 in the direction of travel. Figure 7As shown, the compaction detection mechanism 5 includes a knife-shaped plate 19, a guide column 20 and a detection unit 21. The knife-shaped plate 19 is knife-shaped, that is, the bottom of the knife-shaped plate 19 contains a blade along its length direction, so that the knife-shaped plate 19 can split the molding sand. The knife-shaped plate 19 extends along the travel direction of the scraping mechanism 3. The knife-shaped plate 19 is located below the guide column 20. The knife-shaped plate 19 is fixedly connected to the guide column 20. The guide column 20 is a telescopic structure, including a sleeve, a slide rod and a reset spring. The slide rod is slidably arranged in the sleeve, the slide rod is vertically arranged and the reset spring is sleeved on the slide rod, the bottom end of the slide rod is fixedly connected to the knife-shaped plate 19, and the sleeve is fixedly arranged on the scraping mechanism 3. On the sand rack 11, the detection unit 21 is also fixedly arranged on the scraper rack 11 and is located above the guide column 20. The detection unit 21 is used to detect the position of the knife plate 19. When the scraping mechanism 3 moves downward, the knife plate 19 first contacts the molding sand. Due to its knife-like shape, it is easy to split the molding sand and contact the upper surface of the sand box 22. As it continues to move downward, the knife plate 19 moves vertically along the guide column 20. When the detection unit 21 sends a signal, the downward movement stops, thereby sending a signal to indicate the next scraping action, thereby ensuring the positioning accuracy of the scraper 13, without manual adjustment, and ensuring the scraping and compacting effect.

[0039] It should be noted that, in the non-working state, the height of the knife plate 19 is lower than the height of the scraper 13. The scraping action will only be performed when the height of the knife plate 19 is the same as the height of the scraper 13, that is, the upward movement distance of the knife plate 19 is the same as the height difference between the knife plate 19 and the scraper 13, thereby effectively ensuring the descending positioning accuracy of the scraper 13.

[0040] It is understandable that a control center is also provided, which is connected to the drive cylinder 8, the motor 15 and the detection unit 21 to automatically coordinate the switching between the lifting movement and the scraping movement.

[0041] The specific working principle is:

[0042] The cylinder rod of the driving cylinder 8 extends downward, driving the lifting frame 9 to move downward. During the movement, the first rollers 10 on both sides of the lifting frame 9 cooperate with the guide rails on the guide rail column 6 to improve stability. During the descent of the lifting frame 9, the guide rail assembly 14 is driven to descend. Since the scraper frame 11 is connected to the guide rail assembly 14 through the second roller 12, and the transmission shaft 16 is installed on the connecting rod, and the compaction detection mechanism 5 is installed on the front side of the travel direction of the scraping mechanism 3, when the guide rail assembly 14 descends, the scraper frame 11 and the transmission shaft 16 can be driven to move downward, thereby realizing the synchronous descent of the scraping mechanism 3, the scraping drive mechanism 4 and the compaction detection mechanism 5;

[0043] When descending, the knife plate 19 first contacts the molding sand, splits the molding sand and contacts the upper surface of the sand box 22. As it continues to move downward, the knife plate 19 moves vertically along the guide column 20. When the detection unit 21 detects that the height of the knife plate 19 is the same as the height of the scraper 13, a signal is sent, and the downward movement stops, thereby sending a signal to indicate the next scraping action;

[0044] The motor 15 drives the transmission shaft 16 to rotate around the axis, and the transmission shaft 16 drives the gears 17 at both ends to rotate, and then with the cooperation of the gear 17 and the rack 18, the transmission shaft 16 reciprocates along the rack 18. At the same time, the transmission shaft 16 drives the scraping mechanism 3 to reciprocate along the rack 18 as a whole to realize automatic scraping action.

[0045] The setting of the lifting mechanism 2 enables the scraping mechanism 3 to adapt to the scraping requirements of sand boxes 22 of different heights, and has strong overall adaptability. The setting of the compaction detection mechanism 5 can improve the positioning accuracy of the scraping mechanism 3 when it descends, without the need for manual adjustment, with high positioning accuracy, good scraping effect, and a high degree of automation, which effectively reduces labor intensity.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic sand scraping device for the surface of a sand box, comprising: A frame (1) is characterized in that a lifting mechanism (2) is installed on the top of the frame (1), a scraping drive mechanism (4) is installed on the bottom of the lifting mechanism (2), the scraping drive mechanism (4) comprises a driving assembly and two guide rail assemblies (14) arranged opposite to each other, the guide rail assembly (14) is fixedly installed on the bottom of the lifting mechanism (2), the guide rail assembly (14) extends along the length direction of the sand box (22), a scraping mechanism (3) is arranged between the two guide rail assemblies (14), both ends of the scraping mechanism (3) are rollingly connected to the guide rail assembly (14) through rollers, a rack (18) is fixedly arranged at the bottom of the guide rail assembly (14) along its length direction, the driving assembly is installed on the scraping mechanism (3), the driving assembly is meshed with the rack (18) through a gear (17), the scraping mechanism (3) comprises a scraper (13) extending along the width direction of the sand box (22), and a compaction detection mechanism (5) is installed on the front side of the scraping mechanism (3) in the direction of travel.

2. The automatic sand scraping device for the surface of a sand box according to claim 1, characterized in that: The frame (1) comprises a plurality of vertically arranged guide rail columns (6), the tops of the plurality of guide rail columns (6) are fixedly connected via a connecting frame (7), and guide rails are arranged on the inner sides of the guide rail columns (6).

3. The automatic sand scraping device for the surface of a sand box according to claim 2, characterized in that: The lifting mechanism (2) comprises a driving cylinder (8), which is vertically mounted on a connecting frame (7). A lifting frame (9) is provided below the driving cylinder (8). The cylinder rod of the driving cylinder (8) is fixedly connected to the lifting frame (9). Both sides of the lifting frame (9) are rotatably provided with a plurality of first rollers (10), and the first rollers (10) are rollingly connected to the guide rails on the guide rail columns (6).

4. The automatic sand scraping device for the surface of a sand box according to claim 3 is characterized in that: The guide rail assembly (14) is fixedly arranged at the bottom of the lifting frame (9).

5. The automatic sand scraping device for the surface of a sand box according to claim 3 is characterized in that: A scraper frame (11) is arranged above the scraper (13), the scraper (13) is fixedly connected to the scraper frame (11) via a connecting rod, a plurality of second rollers (12) are rotatably arranged on both sides of the scraper frame (11), the second rollers (12) are rollingly connected to the guide rails on the guide rail assembly (14), and the driving assembly is mounted on the connecting rod.

6. The automatic sand scraping device for the surface of a sand box according to claim 5, characterized in that: The driving assembly comprises a transmission shaft (16) driven by a motor (15), gears (17) being fixedly arranged at both ends of the transmission shaft (16), the two ends of the transmission shaft (16) being meshed with racks (18) at both sides thereof through the gears (17), and the transmission shaft (16) being rotatably arranged on a connecting rod.

7. The automatic sand scraping device for the surface of a sand box according to claim 6, characterized in that: A mounting seat is fixedly arranged on the connecting rod, a bearing is arranged in the mounting seat, and a transmission shaft (16) is rotatably mounted in the mounting seat.

8. The automatic sand scraping device for the surface of a sand box according to claim 5, characterized in that: The compaction detection mechanism (5) comprises a guide column (20) fixedly arranged on a sand scraping frame (11) and a detection unit (21); the guide column (20) is a telescopic structure, the guide column (20) is arranged vertically, a knife-shaped plate (19) is connected below the guide column (20), and a blade is arranged at the bottom of the knife-shaped plate (19) along its length direction.

9. The automatic sand scraping device for the surface of a sand box according to claim 8, characterized in that: The knife-shaped plate (19) is lower than the scraper (13), and the height difference between the knife-shaped plate (19) and the scraper (13) is the same as the upward movement distance of the knife-shaped plate (19).

10. The automatic sand scraping device for the surface of a sand box according to claim 1, characterized in that: It also includes a control center, which is connected to the lifting mechanism (2), the driving component and the compaction detection mechanism (5).

Images