Coated sand crushing and screening device

Abstract

This utility model discloses a film-coated sand crushing and screening device, including a crushing box, a screening box fixedly installed at the lower end of the crushing box, a movable frame movably installed inside the screening box, a screening screen installed inside the movable frame, a conical barrel at the lower end of the crushing box, a discharge pipe at the bottom of the conical barrel, the discharge pipe being located at the upper end of the movable frame, guide rods on both sides of the discharge pipe, the other end of each guide rod being fixedly connected to the screening box, and protective plates on both sides of the upper end of the movable frame, the protective plates being slidably installed with the guide rods, and connecting springs on both sides of one of the protective plates. By setting protective plates and connecting springs at the upper end of the movable frame, it can be kept at the lower end of the discharge pipe during the screening of film-coated sand, preventing the film-coated sand leaking from the discharge pipe from entering the movable frame and reducing material waste.

Description

Technical Field

[0001] This utility model relates to the field of coated sand screening technology, and more specifically, it relates to a coated sand crushing and screening device. Background Technology

[0002] Coated sand mainly uses high-quality selected natural quartz sand as raw sand, thermoplastic phenolic resin, hexamethylenetetramine and reinforcing agents as raw materials. According to the different technical requirements of users, the proportions are appropriately adjusted in terms of curing speed, demolding properties, fluidity, collapsibility, surface finish of castings, and storage. It is one of the best molding materials for automobiles, tractors, hydraulic components, etc. When processing coated sand, it is often necessary to use a crusher to crush it. In order to ensure that the volume of the crushed coated sand meets the requirements, screening equipment is required for screening.

[0003] However, when using existing screening equipment, because the screening frame shakes at the bottom of the discharge port, the coated sand sometimes cannot enter the screening frame during feeding, resulting in the waste of some material and affecting normal use.

[0004] Furthermore, traditional screening equipment lacks an automatic feeding structure for larger coated sand particles, requiring manual re-pouring of the screened coated sand back into the crusher, a time-consuming and labor-intensive process that affects the processing efficiency of the coated sand. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, this utility model provides a coated sand crushing and screening device to solve the technical problem mentioned in the background art, where the screening frame shakes at the bottom of the discharge port, causing coated sand to sometimes fail to enter the screening frame during feeding, resulting in the waste of some materials.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a film-coated sand crushing and screening device, comprising a crushing box, a screening box fixedly mounted at the lower end of the crushing box, a movable frame movably mounted inside the screening box, a screening screen mounted inside the movable frame, the screening screen and the movable frame being installed with screws, a conical barrel at the lower end of the crushing box, a discharge pipe at the bottom of the conical barrel, the discharge pipe being located at the upper end of the movable frame, guide rods on both sides of the discharge pipe, the other ends of the guide rods being fixedly connected to the screening box, protective plates on both sides of the upper end of the movable frame, the protective plates being slidably mounted with the guide rods, a connecting spring on both sides of one of the protective plates, one end of the connecting spring being fixedly connected to the screening box and the discharge pipe respectively, a connecting pipe on one side of the screening box, and a feeding cylinder at the other end of the connecting pipe.

[0009] The present invention is further configured such that a first motor is provided at the bottom of the feeding cylinder, a rotating shaft is provided at the output end of the first motor, the other end of the rotating shaft is rotatably installed with the feeding cylinder, a spiral feeding blade is provided on the outer wall of the rotating shaft, the spiral feeding blade is located inside the feeding cylinder, a guide pipe is provided on the outer wall of the feeding cylinder at the upper end, and the other end of the guide pipe is located at the top of the crushing box.

[0010] The present invention is further configured such that a guide plate is movably provided inside the screening box, and sliders are provided at both ends of the guide plate. A corresponding sliding groove is provided on the inner wall of the screening box, and the sliders are slidably installed with the sliding grooves.

[0011] The present invention is further configured such that a base is fixedly provided at the lower end of the screening box, and a collection box is provided on the upper surface of the base, and the collection box is slidably installed with the screening box.

[0012] The present invention is further configured such that a threaded post is fixedly provided at the tail end of the guide plate, a corresponding through hole is provided on the outer wall of the screening box, the threaded post is located inside the through hole, and a fastening nut is provided on the threaded post.

[0013] The present invention is further configured such that a transmission rod is provided on the outer wall of the movable frame on both sides, the transmission rod is slidably installed with the screening box, a transmission block is fixedly provided at one end of the transmission rod, a second motor is provided on the outer wall of the screening box, and a cam is provided at the output end of the second motor, the cam being in contact with the transmission block.

[0014] The present invention is further configured such that a pulverizing component is provided inside the pulverizing box.

[0015] The present invention is further configured such that the guide plate is inclined and the feeding cylinder is located at the lower end of the guide plate.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a coated sand crushing and screening device, which has the following beneficial effects:

[0018] 1. By setting a guard plate and connecting spring at the upper end of the moving frame, it can always be located at the lower end of the discharge pipe when screening coated sand, so as to prevent the coated sand leaking from the discharge pipe from not entering the interior of the moving frame, reducing material waste and making it convenient to use.

[0019] 2. By setting up a feeding cylinder, spiral feeding blades, and a guide plate, the user can disassemble the screening screen with screws so that the coated sand that is not up to size falls to the top of the guide plate and is guided into the feeding cylinder. Then, the second motor is turned on to make the rotating shaft drive the spiral feeding blades to rotate, so that the larger coated sand is put back into the crushing component for reprocessing through the guide pipe. This is convenient to use and helps to improve the processing quality of coated sand.

[0020] 3. By setting threaded columns, perforations, fastening nuts, and collection boxes, users can remove the fastening nuts during the screening process to remove the threaded columns and guide plates from inside the screening box. At this time, the qualified coated sand will directly pass through the screening screen and fall into the collection box, which is convenient for subsequent centralized material collection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a coated sand crushing and screening device in its unused state.

[0022] Figure 2 This is a schematic diagram showing the installation of the moving frame, guard plate, guide rod, and collection box inside the screening box;

[0023] Figure 3 This is a schematic diagram showing the location of the pulverizing components inside the pulverizing chamber;

[0024] Figure 4 This is a schematic diagram showing the positions of the slider and threaded post on the guide plate.

[0025] Figure 5 Exploded view of the installation of the moving frame and screening screen;

[0026] Figure 6 This is an overall cross-sectional view of a coated sand crushing and screening device.

[0027] In the diagram: 1. Crushing box; 2. Screening box; 3. Moving frame; 4. Screening screen; 5. Conical barrel; 6. Discharge pipe; 7. Guide rod; 8. Protective plate; 9. Connecting spring; 10. Feeding cylinder; 11. First motor; 12. Rotating shaft; 13. Spiral feeding blade; 14. Guide pipe; 15. Guide plate; 16. Sliding block; 17. Slide groove; 18. Base; 19. Collection box; 20. Threaded column; 21. Perforation; 22. Fastening nut; 23. Transmission rod; 24. Transmission block; 25. Second motor; 26. Cam; 27. Crushing assembly. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0031] Please see Figure 1-6 A film-coated sand crushing and screening device includes a crushing box 1, a screening box 2 fixedly mounted at the lower end of the crushing box 1, a movable frame 3 movably mounted inside the screening box 2, a screening screen 4 mounted inside the movable frame 3, the screening screen 4 and the movable frame 3 being installed with screws, a conical barrel 5 at the lower end of the crushing box 1, a discharge pipe 6 at the bottom of the conical barrel 5, the discharge pipe 6 being located at the upper end of the movable frame 3, guide rods 7 on both sides of the discharge pipe 6, the other ends of the guide rods 7 being fixedly connected to the screening box 2, protective plates 8 on both sides of the upper end of the movable frame 3, the protective plates 8 being slidably mounted to the guide rods 7, a connecting spring 9 on both sides of one of the protective plates 8, one end of the connecting spring 9 being fixedly connected to the screening box 2 and the discharge pipe 6 respectively, a connecting pipe on one side of the screening box 2, a feeding cylinder 10 at the other end of the connecting pipe, and a crushing assembly 27 inside the crushing box 1.

[0032] In this embodiment, a first motor 11 is provided at the bottom of the feeding cylinder 10. A rotating shaft 12 is provided at the output end of the first motor 11. The other end of the rotating shaft 12 is rotatably installed with the feeding cylinder 10. A spiral feeding blade 13 is provided on the outer wall of the rotating shaft 12. The spiral feeding blade 13 is located inside the feeding cylinder 10. A guide pipe 14 is provided on the upper end of the outer wall of the feeding cylinder 10. The other end of the guide pipe 14 is located at the top of the crushing box 1. A guide plate 15 is movably provided inside the screening box 2. A slider 16 is provided at both ends of the guide plate 15. A corresponding groove 17 is provided on the inner wall of the screening box 2. The slider 16 and the groove 17 are slidably installed. The guide plate 15 is inclined, and the feeding cylinder 10 is located at the lower end of the guide plate 15.

[0033] More specifically, by setting a guard plate 8 and a connecting spring 9 at the upper end of the moving frame 3, it can always be located at the lower end of the discharge pipe 6 when screening the coated sand. This prevents the coated sand leaking from the bottom of the discharge pipe 6 from not entering the moving frame 3, reducing material waste and facilitating use. After screening, the guide plate 15 can be installed in the screening box 2, and the screening screen 4 can be disassembled by removing the screws. This allows the coated sand that is not up to size to fall onto the upper end of the guide plate 15 and be guided into the feeding cylinder 10. Then, the second motor 25 is turned on to make the rotating shaft 12 drive the spiral feeding blades 13 to rotate, so that the larger coated sand can re-enter the crushing assembly 27 through the guide pipe 14 for further processing. This is convenient to use and helps to increase the processing quality of the coated sand.

[0034] Please see Figure 1 , Figure 3 , Figure 4 and Figure 6 As an implementation method for collecting the crushed coated sand: a base 18 is fixedly provided at the lower end of the screening box 2, and a collection box 19 is provided on the upper end surface of the base 18. The collection box 19 is slidably installed with the screening box 2. A threaded post 20 is fixedly provided at the tail end of the guide plate 15. A through hole 21 is correspondingly opened on the outer wall of the screening box 2. The threaded post 20 is located inside the through hole 21, and a fastening nut 22 is provided on the threaded post 20.

[0035] Specifically, during the screening process, the user can remove the fastening nut 22 to remove the threaded column 20 and the guide plate 15 from the inside of the screening box 2. At this time, the qualified coated sand will directly pass through the screening screen 4 and fall into the collection box 19, which is convenient for subsequent centralized material collection.

[0036] Please refer to Figure 1 and Figure 4As a further embodiment of shaking the moving frame 3: a transmission rod 23 is provided on one side and on both sides of the moving frame 3. The transmission rod 23 is slidably installed with the screening box 2. A transmission block 24 is fixedly provided at one end of the transmission rod 23. A second motor 25 is provided on the outer wall of the screening box 2. A cam 26 is provided at the output end of the second motor 25. The cam 26 contacts the transmission block 24.

[0037] Specifically, the user can turn on the second motor 25 to rotate the cam 26. At this time, the cam 26 will drive the moving frame 3 to sway left and right through the transmission block 24 and the transmission rod 23 to screen the coated sand that leaks from the bottom of the crushing box 1.

[0038] In summary, when using the overall equipment: first, add the coated sand to be crushed into the crushing box 1, then turn on the second motor 25 to rotate the cam 26. At this time, the cam 26 will drive the moving frame 3 to sway left and right through the transmission block 24 and the transmission rod 23 to screen the coated sand leaking from the bottom of the crushing box 1. By setting a guard plate 8 and a connecting spring 9 at the upper end of the moving frame 3, it can always be located at the lower end of the discharge pipe 6 when screening the coated sand, to prevent the coated sand leaking from the bottom of the discharge pipe 6 from not entering the moving frame 3, thus reducing material waste. During the screening process... In the process, the coated sand with the correct volume will directly pass through the screening screen 4 and fall into the collection box 19 for convenient collection. After screening, the guide plate 15 can be installed in the screening box 2, and the screening screen 4 can be disassembled by removing the screws so that the coated sand with the incorrect volume falls to the upper end of the guide plate 15 and is guided into the feeding cylinder 10. Then, the second motor 25 is turned on to make the rotating shaft 12 drive the spiral feeding blades 13 to rotate, so that the coated sand with the larger volume can re-enter the crushing component 27 through the guide pipe 14 for further processing. This is convenient to use and helps to increase the processing quality of the coated sand.

[0039] The motors mentioned above are all controlled by controllers or drivers. Since the controllers and matching equipment are common devices and belong to existing mature technologies, their electrical connection relationships and specific circuit structures will not be described in detail here.

[0040] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A film-coated sand crushing and screening device, comprising a crushing box (1), characterized in that: A screening box (2) is fixedly installed at the lower end of the crushing box (1). A movable frame (3) is movably installed inside the screening box (2). A screening screen (4) is installed inside the movable frame (3). The screening screen (4) and the movable frame (3) are installed with screws. A conical barrel (5) is installed at the lower end of the crushing box (1). A discharge pipe (6) is installed at the bottom of the conical barrel (5). The discharge pipe (6) is located at the upper end of the movable frame (3). Guide rods (7) are installed on both sides of the discharge pipe (6). The other end of the guide rod (7) is fixedly connected to the screening box (2). The upper surface of the moving frame (3) and both sides are provided with guard plates (8). The guard plates (8) are slidably installed with the guide rod (7). One of the guard plates (8) is provided with connecting springs (9) on both sides. One end of the connecting spring (9) is fixedly connected to the screening box (2) and the discharge pipe (6) respectively. One side of the screening box (2) is provided with a connecting pipe. The other end of the connecting pipe is provided with a feeding cylinder (10).

2. The coated sand crushing and screening equipment according to claim 1, characterized in that: The bottom of the feeding cylinder (10) is provided with a first motor (11), the output end of the first motor (11) is provided with a rotating shaft (12), the other end of the rotating shaft (12) is rotatably installed with the feeding cylinder (10), the outer wall of the rotating shaft (12) is provided with a spiral feeding blade (13), the spiral feeding blade (13) is located inside the feeding cylinder (10), the outer wall of the feeding cylinder (10) and the upper end are provided with a guide pipe (14), the other end of the guide pipe (14) is located at the top of the crushing box (1).

3. The coated sand crushing and screening equipment according to claim 2, characterized in that: The screening box (2) is equipped with a guide plate (15) inside. Both ends of the guide plate (15) are equipped with sliders (16). The inner wall of the screening box (2) is provided with corresponding grooves (17). The sliders (16) and the grooves (17) are slidably installed.

4. The coated sand crushing and screening equipment according to claim 1, characterized in that: The lower end of the screening box (2) is fixedly provided with a base (18), and the upper surface of the base (18) is provided with a collection box (19), which is slidably installed with the screening box (2).

5. The coated sand crushing and screening equipment according to claim 3, characterized in that: The tail end of the guide plate (15) is fixedly provided with a threaded post (20), and the outer wall of the screening box (2) is provided with a corresponding through hole (21). The threaded post (20) is located inside the through hole (21), and a fastening nut (22) is provided on the threaded post (20).

6. The coated sand crushing and screening equipment according to claim 1, characterized in that: On the outer wall of the movable frame (3) and on both sides there are transmission rods (23), and the transmission rods (23) are slidably installed with the screening box (2). One end of the transmission rod (23) is fixedly provided with a transmission block (24). The outer wall of the screening box (2) is provided with a second motor (25), and the output end of the second motor (25) is provided with a cam (26). The cam (26) contacts the transmission block (24).

7. The coated sand crushing and screening equipment according to claim 1, characterized in that: The crushing box (1) is equipped with a crushing component (27).

8. The coated sand crushing and screening equipment according to claim 3, characterized in that: The guide plate (15) is inclined, and the feed cylinder (10) is located at the lower end of the guide plate (15).

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