Surface grinding device for coated sand recovery

Abstract

The application relates to the technical field of coated sand surface grinding, in particular to a surface grinding device for coated sand recovery. A guide bin is arranged at the top opening of a working box, a feeding port is arranged at the top of the guide bin, a discharging port is arranged at the bottom of the guide bin, a coated sand collecting mechanism is arranged at the bottom of the working box, a grinding mechanism is arranged in the working box, a cleaning mechanism is arranged at the side of the grinding mechanism, a separating mechanism is arranged in the working box and located below the grinding mechanism, and a dust collection mechanism is arranged at one side of the working box and has a working end located in the separating mechanism. The grinding mechanism arranged in the working box can quickly grind the coated sand to be ground to meet the standard, the grinding surface of the grinding mechanism can be cleaned through the cleaning mechanism, the grinding quality and efficiency of the grinding mechanism are improved, and the coated sand and the resin are separated and collected through the cooperation of the separating mechanism, the coated sand collecting mechanism and the dust collection mechanism.

Description

Technical Field

[0001] This invention relates to the field of coated sand surface grinding technology, specifically to a surface grinding device for coated sand recycling. Background Technology

[0002] Precision casting molds made with coated sand can be used for precision casting, improving the quality and precision of castings. Therefore, they are widely used in the industrial manufacturing field. However, when using coated sand to make precision casting molds, the molds produced may be substandard and become scrap. In order to save resources, it is necessary to recycle and reuse the scrapped precision casting molds.

[0003] Furthermore, the scrapped coated sand molds will undergo processes such as crushing, dust removal, and iron removal after recycling to become coated sand again. Since the outer surface of the coated sand is covered with resin, it is necessary to grind the coated sand and remove the resin from its surface to obtain pure natural sand cores that can be reused in production.

[0004] Currently available coated sand grinding equipment generally struggles to grind coated sand evenly during the grinding process, resulting in poor grinding and resin removal effects, as well as low grinding efficiency.

[0005] Chinese Patent CN202222973485.5 discloses a surface grinding device for recovering coated sand, comprising a feeding hopper, a spiral elevator, a grinding barrel, a grinding mechanism, and a dust collection mechanism. One side of the feeding hopper is connected to one side of the bottom of the spiral elevator, and the grinding barrel is connected to the other side of the spiral elevator. A guide plate is inclinedly arranged at the bottom of the grinding barrel, and a guide block is arranged below the guide plate at the bottom of the grinding barrel. A grinding groove is connected inside the grinding barrel through a collection plate. The grinding mechanism includes a hydraulic cylinder, a limiting frame, a grinding head, and a drive motor. The hydraulic cylinder is located at the top of the grinding barrel and is connected to the limiting frame inside the grinding barrel. The bottom of the limiting frame is rotatably connected to the grinding head. The grinding head is located on the limiting frame and connected to the drive motor. The limiting frame is slidably connected to the top of the grinding barrel through multiple limiting rods. The dust collection mechanism includes a dust suction hood, a dust collection bag, a sealed box, and a fan.

[0006] The existing technical solutions mentioned above have the following drawbacks: during the grinding process of coated sand, the grinding surface of the grinding head of the device inevitably has coated sand adhering to it, which affects the grinding effect of the coated sand. At the same time, the device needs to grind the coated sand multiple times to meet the standard, which reduces the grinding efficiency of the coated sand. Summary of the Invention

[0007] To address the problems existing in the current technology, this application provides a surface grinding device for recycling coated sand. By setting a grinding mechanism in the working box, the coated sand to be ground can be quickly ground to meet the standard. The grinding surface of the grinding mechanism can be cleaned by the cleaning mechanism, thereby improving the grinding quality and efficiency of the grinding mechanism. By coordinating the separation mechanism, the coated sand collection mechanism and the dust collection mechanism, the coated sand and resin can be separated and collected separately.

[0008] To address the problems of existing technologies, the present invention provides a surface grinding device for recovering coated sand, characterized in that it includes a working box and a grinding mechanism, a separation mechanism, a cleaning mechanism, a coated sand collection mechanism, and a dust collection mechanism disposed on the working box;

[0009] A guide chamber is provided at the top opening of the working box. The top of the guide chamber has a feed inlet, and the bottom of the guide chamber has a discharge outlet. A film-coated sand collection mechanism is provided at the bottom of the working box.

[0010] The grinding mechanism is located inside the working box, at the discharge port of the guide chamber, and a cleaning mechanism is provided on the side of the grinding mechanism.

[0011] The separation mechanism is installed inside the working chamber and is located below the grinding mechanism;

[0012] The dust collection mechanism is located on one side of the working box, and the working end of the dust collection mechanism is located inside the separation mechanism.

[0013] Preferably, the grinding mechanism includes a drive component, a grinding shaft, and a rotating shaft;

[0014] The rotating shaft has two rotatable shafts arranged symmetrically inside the working box. One end of each rotating shaft passes through the working box and extends outward.

[0015] The drive unit is located outside the working box, and the drive unit is linked to the two rotating shafts;

[0016] The number of grinding shafts is equal to the number of rotating shafts and corresponds one-to-one. The grinding shafts are rotatably mounted on rotating shafts inside the work box, and the grinding surface of the grinding shafts is equipped with multiple grinding blocks.

[0017] Preferably, the cleaning mechanism includes a cleaning plate and an anti-clogging component;

[0018] The number of cleaning plates is the same as the number of grinding shafts and they correspond one-to-one. Two cleaning plates are set on the inside sides of the work box. The cleaning surface of the cleaning plate has a certain tilt angle. Multiple scraping columns are arranged linearly on the cleaning surface of the cleaning plate. There are grooves between two adjacent rows of scraping columns on the cleaning plate.

[0019] The number of anti-clogging components is equal to the number of cleaning plates and corresponds one-to-one. The working end of the anti-clogging component extends outward through the slot provided in the cleaning plate.

[0020] Preferably, the separation mechanism includes a separation box, a mounting bracket, and bolts;

[0021] The mounting bracket is located inside the work box, below the grinding mechanism, and is fixed to the work box with bolts.

[0022] The separation box is mounted on the mounting frame. The top of the separation box has an opening, the bottom of the separation box has a separation hole, and the side of the separation box has a suction port for the suction end of the vacuuming mechanism to be inserted.

[0023] Preferably, the anti-blocking component includes a plug-in portion, a hinge portion, and a pressing portion;

[0024] The insertion part is located at the end of the cleaning plate away from the scraper column, and the insertion end of the insertion part is inserted into the slot opened in the cleaning plate;

[0025] The hinge is located on the top side of the separation box, below the cleaning plate. One end of the hinge is connected to the plug-in part, and the other end of the hinge extends outward from the working box.

[0026] The pressing part is located on the outer side of the working box, with the pressing end of the pressing part facing downwards. The pressing part is located above the hinged part extending out of the working box.

[0027] Preferably, the hinged part includes a rotating seat, a rotating rod, and a rocker arm;

[0028] The rotating seat is located on top of the separation box;

[0029] The rotating rod is horizontally positioned and rotatable, and is mounted on the rotating seat.

[0030] One end of the rocker is connected to the insertion part, the other end of the rocker extends out of the working box and is connected to the pressing end of the pressing part, and the middle of the rocker is rotatably connected to the rotating rod.

[0031] Preferably, the plug-in portion includes a plug block and a connecting plate;

[0032] The connecting plate is located on the side of the cleaning plate away from the scraper column, and the middle of the end of the connecting plate away from the cleaning plate is fixedly connected to one end of the rocker plate.

[0033] The number of inserts is the same as the number of slots opened on the cleaning plate and they correspond one-to-one. The end of the insert away from the cleaning plate is connected to the connecting plate.

[0034] Preferably, the pressing part includes a mounting plate and a pressing cylinder;

[0035] The mounting plate is located on the outer side of the work box;

[0036] The pressing cylinder is located at the bottom of the mounting plate, with its pressing end facing downwards. The pressing end of the pressing cylinder is connected to one end of the rocker plate that extends outwards.

[0037] Preferably, the dust collection mechanism includes a dust collection pipe, a delivery pipe, a limiting frame, and a dust collection box;

[0038] The conveying pipeline is located on the outside of the working box;

[0039] One end of the suction pipe is connected to the input end of the delivery pipe, and the other end of the suction pipe is connected to the suction port of the separation box.

[0040] The limit bracket is installed on the outside of the work box;

[0041] The dust collection box is mounted on the limit frame.

[0042] Preferably, the coated sand collection mechanism includes a collection box, a sliding table, and a slider;

[0043] The slide has two bottoms, each located inside the work box;

[0044] The number of sliders is the same as the number of slides and they correspond one-to-one. The sliders that can slide are set on the slides.

[0045] The collection box is located inside the working box. The bottom plate of the collection box is connected to two sliders, and a handle is provided on the side of the collection box.

[0046] The advantages of this invention compared to the prior art are as follows: By setting the grinding mechanism in the working box, the coated sand to be ground can be quickly ground to meet the standard. The grinding surface of the grinding mechanism can be cleaned by the cleaning mechanism, thereby improving the grinding quality and efficiency of the grinding mechanism. By cooperating with the separation mechanism, the coated sand collection mechanism and the dust collection mechanism, the coated sand and resin can be separated and collected separately. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the overall structure of a surface grinding device for recovering coated sand.

[0048] Figure 2 Internal cross-section of a surface grinding device for coated sand recycling Figure 1 .

[0049] Figure 3 This is a partial structural diagram of a surface grinding device for recovering coated sand.

[0050] Figure 4 This is a structural schematic diagram of the cleaning plate of this application.

[0051] Figure 5 A schematic diagram of the internal structure of a surface grinding device for coated sand recycling. Figure 2 .

[0052] Figure 6 This application is Figure 5 A magnified view of a portion of point A in the middle.

[0053] Figure 7 This is a schematic diagram of the separation box of this application.

[0054] Figure 8 This is a structural schematic diagram of the vacuuming mechanism of this application.

[0055] Figure 9 A schematic diagram of the internal structure of a surface grinding device for coated sand recycling. Figure 3 .

[0056] Figure 10 This application is Figure 9 A magnified view of a section at point B in the middle.

[0057] The diagram is labeled as follows: 1-Working box; 11-Guide chamber; 111-Feed inlet; 112-Discharge outlet; 2-Grinding mechanism; 21-Drive component; 22-Grinding shaft; 221-Grinding block; 23-Rotating shaft; 3-Separation mechanism; 31-Separation box; 311-Separation hole; 312-Opening; 313-Dust suction port; 32-Mounting bracket; 33-Bolt; 4-Cleaning mechanism; 41-Cleaning plate; 411-Scraper column; 412-Grooving; 42-Anti-clogging component; 4 21-Plug-in part; 4211-Plug-in block; 4212-Connecting plate; 422-Hinge part; 4221-Rotating seat; 4222-Rotating rod; 4223-Rock plate; 423-Pressing part; 4231-Mounting plate; 4232-Pressing cylinder; 5-Coated sand collection mechanism; 51-Collection box; 511-Handle; 52-Slide table; 53-Slider; 6-Dust collection mechanism; 61-Dust collection pipe; 62-Conveying pipe; 63-Limiting frame; 64-Dust collection box. Implementation

[0058] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0059] See Figures 1 to 10 As shown, a surface grinding device for recovering coated sand includes a working box 1 and a grinding mechanism 2, a separation mechanism 3, a cleaning mechanism 4, a coated sand collection mechanism 5, and a dust collection mechanism 6 disposed on the working box 1.

[0060] A guide chamber 11 is provided at the top opening 312 of the working box 1. The top of the guide chamber 11 is provided with a feed inlet 111 and the bottom of the guide chamber 11 is provided with a discharge outlet 112. A film-coated sand collection mechanism 5 is provided at the bottom of the working box 1.

[0061] The grinding mechanism 2 is installed inside the working box 1. The grinding mechanism 2 is located at the discharge port 112 opened in the guide chamber 11. A cleaning mechanism 4 is opened on the side of the grinding mechanism 2.

[0062] The separation mechanism 3 is installed inside the working box 1, and the separation mechanism 3 is located below the grinding mechanism 2;

[0063] The dust collection mechanism 6 is located on one side of the working box 1, and the working end of the dust collection mechanism 6 is located inside the separation mechanism 3.

[0064] When the device is needed, the operator places the coated sand to be ground into the feed inlet 111 of the guide chamber 11 at the top of the working box 1. The coated sand is guided to the grinding mechanism 2 through the discharge port 112 of the guide chamber 11. The grinding mechanism 2 grinds the coated sand. During the grinding process, the grinding surface of the grinding mechanism 2 will inevitably be covered with coated sand. The cleaning mechanism 4 cleans the grinding surface of the grinding mechanism 2, thereby improving the grinding effect of the grinding mechanism 2. After the coated sand is ground, it enters the separation mechanism 3. The separation mechanism 3 separates the resin mixed in the ground coated sand. The separated coated sand is collected by the coated sand collection mechanism 5, making it easy for the operator to take out the coated sand that has been ground and separated from the resin. The dust suction mechanism 6 sucks out and collects the resin separated in the separation mechanism 3. This device achieves grinding of the coated sand to be ground and removal of the resin mixed in the coated sand at the same time, which not only improves the grinding effect of the coated sand, but also improves the purity of the coated sand.

[0065] See Figure 3 As shown, the grinding mechanism 2 includes a driving component 21, a grinding shaft 22, and a rotating shaft 23;

[0066] Two rotating shafts 23 are rotatably arranged inside the working box 1. The two rotating shafts 23 are symmetrically arranged inside the working box 1. One end of each rotating shaft 23 passes through the working box 1 and extends outward.

[0067] The drive unit 21 is located outside the working box 1, and the drive unit 21 is linked with the two rotating shafts 23.

[0068] The number of grinding shafts 22 is equal to the number of rotating shafts 23 and they correspond one-to-one. The grinding shafts 22 are rotatably mounted on the rotating shafts 23 inside the working box 1. The grinding surface of the grinding shafts 22 is provided with multiple grinding blocks 221.

[0069] By activating the drive unit 21, two rotating shafts 23 are driven to rotate in opposite directions within the working box 1, which in turn drives two grinding shafts 22 to rotate in opposite directions simultaneously. When the coated sand is located between the two grinding shafts 22, the coated sand is ground by the rotation of the two grinding shafts 22. By setting multiple grinding blocks 221 on the grinding shafts 22, the grinding effect of the grinding shafts 22 can be improved, thereby making the coated sand grind more finely.

[0070] See Figure 2 and Figure 4 As shown, the cleaning mechanism 4 includes a cleaning plate 41 and an anti-clogging component 42;

[0071] The number of cleaning plates 41 is the same as the number of grinding shafts 22 and they correspond one-to-one. Two cleaning plates 41 are respectively set on the inside sides of the work box 1. The cleaning surface of the cleaning plate 41 has a certain tilt angle. Multiple scraper columns 411 arranged in a linear manner are provided on the cleaning surface of the cleaning plate 41. A groove 412 is provided between two adjacent rows of scraper columns 411 on the cleaning plate 41.

[0072] The number of anti-blocking components 42 is equal to the number of cleaning plates 41 and they correspond one-to-one. The working end of the anti-blocking component 42 extends outward through the slot 412 provided in the cleaning plate 41.

[0073] The scraper column 411 on the cleaning plate 41 causes the grinding surface of the grinding shaft 22 to contact the scraper column 411 during rotation. The scraper column 411 scrapes off the coated sand adhering to the surface of the grinding shaft 22, causing the coated sand to fall onto the cleaning plate 41. Since the cleaning plate 41 has a certain tilt angle, the coated sand that falls onto the cleaning plate 41 can be transported to the separation mechanism 3. When the space between two adjacent rows of scraper columns 411 is filled with coated sand, the anti-blocking component 42 is activated. The working end of the anti-blocking component 42 moves upward within the slot 412 opened in the cleaning plate 41, thereby pushing away the coated sand blocking the space between the scraper columns 411, thus improving the cleaning ability of the cleaning plate 41.

[0074] See Figure 2 , Figure 5 and Figure 7 As shown, the separation mechanism 3 includes a separation box 31, a mounting bracket 32, and bolts 33;

[0075] The mounting bracket 32 ​​is installed inside the work box 1 and is located below the grinding mechanism 2. The mounting bracket 32 ​​is fixed to the work box 1 by bolts 33.

[0076] The separation box 31 is mounted on the mounting bracket 32. The top of the separation box 31 has an opening 312, the bottom of the separation box 31 has a separation hole 311, and the side of the separation box 31 has a suction port 313 for the suction end of the suction mechanism 6 to be inserted.

[0077] The mounting bracket 32 ​​can be quickly installed and removed from the working box 1 using bolts 33. The separation box 31 is fixed to the working box 1 using the mounting bracket 32. The coated sand that has been ground in the grinding mechanism 2 enters the separation box 31 through the opening 312. The resin in the coated sand is left in the separation box 31 through the separation hole 311 at the bottom of the separation box 31. The separated coated sand enters the coated sand collection mechanism 5 through the separation hole 311. The resin left in the separation box 31 is sucked into the dust collection mechanism 6 through the dust suction port 313 of the separation box 31, which improves the purity of the coated sand.

[0078] See Figure 2 and Figure 5 As shown, the anti-blocking component 42 includes a plug-in portion 421, a hinge portion 422, and a pressing portion 423;

[0079] The insertion part 421 is provided at the end of the cleaning plate 41 away from the scraper 411, and the insertion end of the insertion part 421 is inserted into the slot 412 opened in the cleaning plate 41.

[0080] The hinge part 422 is provided on the top side of the separation box 31. The hinge part 422 is located below the cleaning plate 41. One end of the hinge part 422 is connected to the plug part 421, and the other end of the hinge part 422 extends outward from the working box 1.

[0081] The pressing part 423 is provided on the outer side of the working box 1, with the pressing end of the pressing part 423 facing downward, and the pressing part 423 is located above the hinge part 422 extending out of the working box 1.

[0082] By activating the pressing part 423, one end of the hinge part 422 is pressed downward, and the other end of the hinge part 422 moves upward, thereby driving the insertion part 421 connected to one end of the hinge part 422 to move upward. This causes the insertion end of the insertion part 421 to move upward into the slot 412 opened in the cleaning plate 41, thereby preventing the two adjacent rows of scraper columns 411 on the cleaning plate 41 from being blocked by the coated sand, thus improving the cleaning effect of the cleaning plate 41.

[0083] See Figure 5 and Figure 6 As shown, the hinge part 422 includes a rotating seat 4221, a rotating rod 4222, and a rocker plate 4223;

[0084] The rotating seat 4221 is located on top of the separation box 31;

[0085] The rotating rod 4222 is horizontal and rotatable, and is mounted on the rotating seat 4221;

[0086] One end of the rocker 4223 is connected to the insertion part 421, and the other end of the rocker 4223 extends out of the working box 1 and is connected to the pressing end of the pressing part 423. The middle part of the rocker 4223 is rotatably connected to the rotating rod 4222.

[0087] By setting the rotating seat 4221 and the rotating rod 4222, the rocker plate 4223 is fixed on the rotating rod 4222. When the pressing part 423 presses one end of the rocker plate 4223 downward, the other end of the rocker plate 4223 is raised upward along the rotating rod 4222, thereby driving the insertion part 421 to move upward.

[0088] See Figure 5 and Figure 6 As shown, the plug-in part 421 includes a plug block 4211 and a connecting plate 4212;

[0089] The connecting plate 4212 is located on the side of the cleaning plate 41 away from the scraper 411, and the middle of the end of the connecting plate 4212 away from the cleaning plate 41 is fixedly connected to one end of the rocker plate 4223.

[0090] The number of inserts 4211 is the same as the number of slots 412 opened on the cleaning plate 41 and they correspond one-to-one. The end of the insert 4211 away from the cleaning plate 41 is connected to the connecting plate 4212.

[0091] By setting the connecting plate 4212, the insert blocks 4211 can be moved together. When the connecting plate 4212 moves upward, it drives multiple insert blocks 4211 to move upward into the slot 412 opened in the cleaning plate 41. Then, the insert blocks 4211 disperse the coated sand gathered on the cleaning plate 41, so that the coated sand slides off the cleaning plate 41.

[0092] See Figure 5 , Figure 6 and Figure 10 As shown, the pressing part 423 includes a mounting plate 4231 and a pressing cylinder 4232;

[0093] Mounting plate 4231 is disposed on the outer side of the work box 1;

[0094] The pressing cylinder 4232 is located at the bottom of the mounting plate 4231. The pressing end of the pressing cylinder 4232 is set downward, and the pressing end of the pressing cylinder 4232 is connected to one end of the rocker plate 4223.

[0095] Activating the downward pressing cylinder 4232 causes the downward pressing end of the downward pressing cylinder 4232 to drive one end of the rocker plate 4223 downward, providing power for the movement of the rocker plate 4223.

[0096] See Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, the vacuuming mechanism 6 includes a vacuuming pipe 61, a conveying pipe 62, a limiting frame 63, and a dust collection box 64;

[0097] The conveying pipe 62 is located on the outside of the working box 1;

[0098] One end of the suction pipe 61 is connected to the input end of the conveying pipe 62, and the other end of the suction pipe 61 is connected to the suction port 313 opened in the separation box 31.

[0099] The limit bracket 63 is installed on the outside of the work box 1;

[0100] The dust collection box 64 is mounted on the limit frame 63.

[0101] The resin remaining in the separation box 31 is sucked into the conveying pipe 62 through the dust suction pipe 61. The resin is then transported from the output end of the conveying pipe 62 to the dust collection box 64. The dust collection box 64 collects the resin separated from the coated sand, which improves the practicality of the device.

[0102] See Figure 2 and Figure 9 As shown, the coated sand collection mechanism 5 includes a collection box 51, a sliding table 52, and a slider 53;

[0103] The slide table 52 has two bottoms respectively disposed inside the work box 1;

[0104] The number of sliders 53 is the same as the number of slides 52 and they correspond one-to-one. The sliders 53 are slidably set on the slides 52.

[0105] The collection box 51 is installed inside the working box 1. The bottom plate of the collection box 51 is connected to two sliders 53. A handle 511 is provided on the side of the collection box 51.

[0106] After the coated sand is ground and separated, it is collected in a collection box 51. When the collection box 51 is full of coated sand, the worker holds the handle 511 and takes the collection box 51 out of the working box 1. The setting of the slide table 52 and the slider 53 makes it easier to take out the collection box 51 full of coated sand.

[0107] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A surface grinding device for recovering coated sand, characterized in that, It includes a work box (1) and a grinding mechanism (2), a separation mechanism (3), a cleaning mechanism (4), a coated sand collection mechanism (5), and a dust collection mechanism (6) installed on the work box (1); A guide chamber (11) is provided at the top opening (312) of the working box (1). A feed inlet (111) is provided at the top of the guide chamber (11), and a discharge port (112) is provided at the bottom of the guide chamber (11). A film-coated sand collection mechanism (5) is provided at the bottom of the working box (1). The grinding mechanism (2) is set inside the work box (1). The grinding mechanism (2) is located at the discharge port (112) opened in the guide chamber (11). The grinding mechanism (2) is provided with a cleaning mechanism (4) on its side. The separation mechanism (3) is installed inside the work box (1) and is located below the grinding mechanism (2); The dust collection mechanism (6) is located on one side of the work box (1), and the working end of the dust collection mechanism (6) is located inside the separation mechanism (3); The cleaning mechanism (4) includes a cleaning plate (41) and an anti-clogging component (42); the number of cleaning plates (41) is the same as the number of grinding shafts (22) and they correspond one-to-one. The two cleaning plates (41) are respectively set on the inside sides of the work box (1). The cleaning surface of the cleaning plate (41) has a certain tilt angle. Multiple linearly arranged scraper columns (411) are provided on the cleaning surface of the cleaning plate (41). A slot (412) is provided between two adjacent rows of scraper columns (411) on the cleaning plate (41). The number of anti-clogging components (42) is equal to the number of cleaning plates (41) and they correspond one-to-one. The working end of the anti-clogging component (42) extends outward through the slot (412) provided on the cleaning plate (41).

2. The surface grinding device for coated sand recycling according to claim 1, characterized in that, The grinding mechanism (2) includes a drive (21), a grinding shaft (22) and a rotating shaft (23); Two rotating shafts (23) are rotatably arranged inside the work box (1). The two rotating shafts (23) are symmetrically arranged inside the work box (1). One end of each rotating shaft (23) passes through the work box (1) and extends outward. The drive unit (21) is located outside the work box (1), and the drive unit (21) is linked with the two rotating shafts (23); The number of grinding shafts (22) is equal to the number of rotating shafts (23) and they correspond one-to-one. The grinding shafts (22) are rotatably mounted on the rotating shafts (23) inside the work box (1). The grinding surface of the grinding shafts (22) is provided with multiple grinding blocks (221).

3. The surface grinding device for coated sand recycling according to claim 1, characterized in that, The separation mechanism (3) includes a separation box (31), a mounting bracket (32), and bolts (33); The mounting bracket (32) is set inside the work box (1) and is located below the grinding mechanism (2). The mounting bracket (32) is fixed to the work box (1) by bolts (33). The separation box (31) is mounted on the mounting bracket (32). The top of the separation box (31) has an opening (312), the bottom of the separation box (31) has a separation hole (311), and the side of the separation box (31) has a suction port (313) for the suction end of the suction mechanism (6) to be inserted.

4. A surface grinding device for coated sand recycling according to claim 1 or 3, characterized in that, The anti-blocking component (42) includes a plug-in portion (421), a hinge portion (422), and a pressing portion (423). The plug-in part (421) is located at one end of the cleaning plate (41) away from the scraper (411), and the plug-in end of the plug-in part (421) is inserted into the slot (412) opened in the cleaning plate (41); The hinge (422) is located on the top side of the separation box (31), and the hinge (422) is located below the cleaning plate (41). One end of the hinge (422) is connected to the plug (421), and the other end of the hinge (422) extends outward from the work box (1). The pressing part (423) is provided on the outer side of the work box (1), with the pressing end of the pressing part (423) facing downward, and the pressing part (423) is located above the hinge part (422) extending out of the work box (1).

5. The surface grinding device for coated sand recycling according to claim 4, characterized in that, The hinge (422) includes a rotating seat (4221), a rotating rod (4222), and a rocker (4223). The rotating seat (4221) is located on top of the separation box (31); The rotating rod (4222) is horizontally mounted on the rotating seat (4221) and can rotate. One end of the rocker (4223) is connected to the plug (421), and the other end of the rocker (4223) extends out of the work box (1) and is connected to the pressing end of the pressing part (423). The middle part of the rocker (4223) is rotatably connected to the rotating rod (4222).

6. The surface grinding device for coated sand recycling according to claim 4, characterized in that, The plug-in part (421) includes a plug block (4211) and a connecting plate (4212). The connecting plate (4212) is located on the side of the cleaning plate (41) away from the scraper (411), and the middle of the end of the connecting plate (4212) away from the cleaning plate (41) is fixedly connected to one end of the rocker (4223); The number of inserts (4211) is the same as the number of slots (412) opened on the cleaning plate (41) and they correspond one-to-one. The end of the insert (4211) away from the cleaning plate (41) is connected to the connecting plate (4212).

7. The surface grinding device for coated sand recycling according to claim 4, characterized in that, The pressing part (423) includes a mounting plate (4231) and a pressing cylinder (4232); The mounting plate (4231) is located on the outside side of the work box (1); The pressing cylinder (4232) is located at the bottom of the mounting plate (4231). The pressing end of the pressing cylinder (4232) is set downward, and the pressing end of the pressing cylinder (4232) is connected to one end of the rocker plate (4223).

8. A surface grinding device for coated sand recycling according to claim 1 or 3, characterized in that, The vacuuming mechanism (6) includes a vacuuming pipe (61), a conveying pipe (62), a limiting frame (63), and a dust collection box (64). The conveying pipe (62) is located on the outside side of the work box (1); One end of the suction pipe (61) is connected to the input end of the conveying pipe (62), and the other end of the suction pipe (61) is connected to the suction port (313) opened in the separation box (31). The limiting bracket (63) is installed on the outside of the work box (1); The dust collection box (64) is mounted on the limit frame (63).

9. The surface grinding device for coated sand recycling according to claim 1, characterized in that, The coated sand collection mechanism (5) includes a collection box (51), a sliding table (52) and a slider (53); The slide (52) has two bottoms respectively set inside the work box (1); The number of sliders (53) is the same as the number of slides (52) and they correspond one-to-one. The sliders (53) are slidably set on the slides (52). The collection box (51) is set inside the work box (1). The bottom plate of the collection box (51) is connected to two sliders (53). The side of the collection box (51) is provided with a handle (511).

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