Precoated sand core-making working part dust removal and collection device

Abstract

The utility model discloses a precoated sand core-making working part dedusting and gathering device, which relates to the technical field of precoated sand core-making dedusting and comprises a base, a support frame is fixedly mounted at the top of the base, mounting components are fixedly mounted on two sides of the top of the support frame, a filter box is fixedly mounted on the inner side of the support frame, and a filter screen is fixedly mounted on the filter box. And a filter screen cylinder is fixedly mounted in the filter box, and an air suction assembly is fixedly mounted at the top of the mounting assembly. By adopting the structure and arranging the cleaning frame, when the device is used for air purification and dust removal, dust is filtered and attached by the filter screen cylinder, the driving motor is started to drive the rotating shaft to rotate, so that the scraping auger and the scraping frame rotate, the inner bottom and the inner wall upper end of the filter screen cylinder are cleaned respectively, blockage is avoided, and the discharge valve is opened after purification and filtration. And the scraping auger can assist in discharging dust, cleaning can be achieved without disassembling the filter screen cylinder, maintenance is convenient, and use convenience is improved.

Description

Technical Field

[0001] This utility model belongs to the field of dust removal technology in coated sand core making, and specifically relates to a dust collection device for coated sand core making. Background Technology

[0002] Coated sand core making is an important process in casting production. It involves coating the surface of raw sand (usually quartz sand, etc.) with a layer of thermoplastic phenolic resin or similar material to form coated sand. Then, using specialized equipment and molds, the coated sand is shaped into sand cores of specific shapes and sizes. During this process, the resin is cured through heating or other means, giving the sand core sufficient strength and stability. Coated sand core making has many advantages, such as the ability to produce sand cores with complex shapes to meet the special structural requirements of various castings; its high production efficiency, enabling rapid prototyping; and the good dimensional accuracy and surface quality of the produced sand cores, which helps improve the quality of the castings. This process is used in the automotive industry. It is widely used in casting production in many fields such as machinery, providing important technical support for the production of high-quality castings. At present, in the core-making process, organic waste gas is generated due to the heating of the parting agent. Such as non-methane total hydrocarbons, volatile organic compounds of aromatic hydrocarbon solvents in phenolic resin in coated sand and phenols and formaldehyde produced by the decomposition of phenolic resin, as well as formaldehyde and ammonia produced by the decomposition of hexamethylenetetramine in coated sand, can cause environmental pollution and odor in the workshop, thus affecting the surrounding environment. In the process of core making, it is necessary to treat the waste gas and VOCs. Dust removal and odor removal are effective means of treating waste gas and VOCs.

[0003] Chinese Patent No. CN216574761U discloses a dust removal device for coated sand production, which includes a dust hood, a shell, a sealing strip, a dust collection area, a fixed shell, a handle, a support ring, a sealing plate, a dust storage bin, a sealing plate, a strainer, a filter element, a base, an air duct, a baffle, an exhaust bin, a sand-blocking screen, blades, a rotating seat, a dust guide pipe, a dust collection turbine, an inner liner, and an outer tank. The dust hood has a dust guide pipe installed on its upper end face, and a dust collection turbine installed on the right end face of the dust guide pipe. The shell has a sealing strip installed on its inner side, and a dust collection area is opened on the rear end face of the sealing strip. The handle has a support ring installed on its inner side, and a sealing plate is installed on the lower end face of the support ring. The sealing plate has a dust storage bin opened on its lower end face. Compared with the prior art, this utility model has the following beneficial effects: by using the dust hood, dust can be sucked into the dust guide pipe, and by using the filter element, dust can be filtered quickly, thus improving the dust removal effect of this utility model.

[0004] However, while the aforementioned device can provide some assistance in dust prevention, in practice, after the internal dust is filtered, dust remains in the sand-blocking mesh or filter element inside the outer tank. Cleaning requires disassembling the entire device, making the overall dust removal process cumbersome and inconvenient. Furthermore, during dust removal, dust passes over the suction turbine and blades. Due to the structural load on these areas, prolonged contact with dust can easily damage them, leading to breakage. Therefore, the device presents several inconveniences during use and requires improvement. Utility Model Content

[0005] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a dust collection device for the coated sand core making process, so as to solve the problems raised in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A dust collection device for coated sand core making process includes a base, a support frame fixedly installed on the top of the base, mounting components fixedly installed on both sides of the top of the support frame, a filter box fixedly installed inside the support frame, a filter screen cylinder fixedly installed inside the filter box, a suction component fixedly installed on the top of the mounting components, a cleaning frame fixedly installed at the bottom of the suction component, the cleaning frame being inserted into the inside of the filter screen cylinder, a discharge hopper fixedly installed at the bottom of the filter box, a discharge valve fixedly installed at the bottom of the discharge hopper, the top input end of the discharge valve being connected to the bottom of the filter screen cylinder, and a purification mechanism fixedly installed on one side of the filter box.

[0008] The purification mechanism includes a purification box, which is fixedly installed on one side of a filter box. An activated carbon filter element is inserted into the inner side of the purification box. A sealing plate is fixedly connected to the top of the activated carbon filter element. Magnetic suction plates are fixedly installed at both ends of the bottom of the sealing plate. The inner side of the magnetic suction plate is magnetically connected to the outer side of the purification box. A suction fan is fixedly installed on the outer side of the purification box. The input end of the suction fan is connected to the inside of the purification box. The inner side of the purification box is connected to the inside of the filter box.

[0009] As a preferred technical solution, the mounting assembly includes side rails, which are fixedly installed on the top two sides of the support frame. A sliding plate is slidably connected inside the side rails, and the top of the sliding plate is fixedly connected to the bottom of the mounting assembly. A fixing screw is threaded to the upper outer side of the side rails, and the end of the fixing screw passes through the side rails and fits against the outer side of the sliding plate.

[0010] As a preferred technical solution, the fixing screw is a hand-tightening screw, and the overall cross-sectional shape of the slide plate and the inner cross-sectional shape of the side rail are both set to a convex shape.

[0011] As a preferred technical solution, the suction assembly includes a sealing cover and a side plate. The sealing cover is fixedly installed on the top of the slide plate, and an air guide hopper is fixedly installed on the top of the sealing cover. A flexible hose is fixedly installed on the top of the air guide hopper. The side plate is fixedly installed on the upper end of the support frame away from the suction fan. An electric push rod is fixedly installed on the bottom of the side plate. An air suction pipe is fixedly installed through the electric push rod and through the side plate. An air suction hopper is fixedly installed at the outer end of the air suction pipe. The air suction pipe and the flexible hose are connected. The bottom of the air suction hopper is connected through the sealing cover and through the interior of the filter box.

[0012] As a preferred technical solution, the filter box is cylindrical in shape, the discharge hopper is conical in shape, and mounting holes are provided at the four corners of the top of the base. The mounting holes are countersunk holes.

[0013] As a preferred technical solution, the cleaning frame includes an inner support, which is fixedly installed at the bottom of the sealing cover. The lower end of the inner support is inserted into the upper end of the filter screen cylinder. A drive motor is fixedly installed at the top of the inner support. A rotating shaft is fixedly installed through the inner support at the output end of the drive motor. A scraper is fixedly installed at the bottom of the rotating shaft.

[0014] As a preferred technical solution, scraper frames are fixedly installed at equal intervals on the upper surface of the outer surface of the rotating shaft. The outer side of the scraper frame is in close contact with the inner wall of the filter cylinder. The overall shape of the scraper hinge is conical. The bottom of the filter cylinder is also conical. The bottom of the scraper hinge is in close contact with the bottom of the filter cylinder.

[0015] In summary, the present invention has the following main advantages:

[0016] First, this device is equipped with a purification mechanism. When in use, the suction fan is turned on to generate negative pressure suction inside the filter box. External air and dust are drawn into the filter cylinder with the help of hoses and other means. During this process, the electric push rod can be activated to move the suction pipe and suction bucket, flexibly adjusting the suction and dust removal height to enhance adaptability. The electric push rod can also be adjusted by the motor driving the gear on the slotted gear. The lifting method can be selected according to specific usage needs. The filtered air enters the purification box, where the activated carbon filter element inside works to filter harmful substances, improving air purification and dust filtration performance.

[0017] Secondly, by setting up a cleaning rack, when the device is used for air purification and dust removal, the dust is filtered and adhered to by the filter screen. The drive motor is started to drive the rotating shaft to rotate, which causes the scraper and scraper rack to rotate, cleaning the bottom and upper inner wall of the filter screen respectively, avoiding blockage. After purification and filtration, the discharge valve is opened, and the scraper can assist in the discharge of dust. The filter screen can be cleaned without disassembling it, which is convenient for maintenance and improves the ease of use.

[0018] Third, by utilizing the purification mechanism and installation components, if the equipment needs to be disassembled and repaired during use, the sliding plate and sealing cover can be removed by turning the fixing screw, thereby removing the suction component and cleaning frame, which facilitates the cleaning, maintenance and repair of the filter box and its filter screen. The sealing plate is magnetically fixed to the top of the purification box, and the activated carbon purification core can be removed by prying it during maintenance. The negative pressure of the suction fan stabilizes the sealing plate, making the device stable during purification and convenient for disassembly, assembly, maintenance and repair, thus improving the ease of use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the disassembled structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the cleaning rack structure of this utility model.

[0023] Reference numerals: 1. Base; 2. Support frame; 3. Mounting assembly; 31. Side rail; 32. Slide plate; 33. Fixing screw; 4. Filter box; 5. Filter screen cylinder; 6. Suction assembly; 61. Sealing cover; 62. Side plate; 63. Air guide hopper; 64. Hose; 65. Electric push rod; 66. Suction pipe; 67. Suction hopper; 7. Cleaning rack; 71. Inner support; 72. Drive motor; 73. Rotating shaft; 74. Scraper hinge; 75. Scraper frame; 8. Discharge hopper; 9. Purification mechanism; 91. Purification box; 92. Suction fan; 93. Activated carbon filter element; 94. Sealing plate; 95. Magnetic suction plate; 10. Discharge valve; 11. Mounting hole. Detailed Implementation

[0024] Example

[0025] refer to Figures 1 to 4The dust collection device for the coated sand core making process in this embodiment includes a base 1, a support frame 2 fixedly installed on the top of the base 1, mounting components 3 fixedly installed on both sides of the top of the support frame 2, a filter box 4 fixedly installed on the inner side of the support frame 2, a filter screen cylinder 5 fixedly installed inside the filter box 4, a suction component 6 fixedly installed on the top of the mounting component 3, a cleaning frame 7 fixedly installed on the bottom of the suction component 6, the cleaning frame 7 being inserted into the inner side of the filter screen cylinder 5, a discharge hopper 8 fixedly installed on the bottom of the filter box 4, a discharge valve 10 fixedly installed on the bottom of the discharge hopper 8, the top input end of the discharge valve 10 being connected to the bottom of the filter screen cylinder 5, and a purification mechanism 9 fixedly installed on one side of the filter box 4.

[0026] The purification mechanism 9 includes a purification box 91, which is fixedly installed on one side of the filter box 4. An activated carbon filter element 93 is inserted into the inner side of the purification box 91. A sealing plate 94 is fixedly connected to the top of the activated carbon filter element 93. Magnetic suction plates 95 are fixedly installed at both ends of the bottom of the sealing plate 94. The inner side of the magnetic suction plate 95 is magnetically connected to the outer side of the purification box 91. A suction fan 92 is fixedly installed on the outer side of the purification box 91. The input end of the suction fan 92 is connected to the inside of the purification box 91, and the inner side of the purification box 91 is connected to the inside of the filter box 4. This device can efficiently remove dust by generating negative pressure suction through the suction fan 92. The electric push rod 65 can flexibly adjust the suction height to enhance adaptability. At the same time, the adjustment of the electric push rod 65 can also be driven by the motor driving the gear on the slotted tooth. The lifting method can be selected according to specific usage needs. The drive motor 72 drives the cleaning frame 7 to prevent the filter screen cylinder 5 from clogging and ensure the purification effect. The activated carbon filter element 93 in the purification box 91 can effectively filter out harmful substances. The sealing plate 94 is fixed by the magnetic suction plate 95 for easy disassembly and assembly. The whole has the advantages of reasonable structure, good purification and dust removal effect, convenient use, and easy maintenance and repair. It can well meet the dust removal needs of the coated sand core making workshop.

[0027] refer to Figures 1-3 The mounting component 3 includes side rails 31, which are fixedly installed on the top two sides of the support frame 2. A slide plate 32 is slidably connected inside the side rails 31. The top of the slide plate 32 is fixedly connected to the bottom of the mounting component 3. A fixing screw 33 is threadedly connected to the upper outer side of the side rails 31. The end of the fixing screw 33 passes through the outer side of the side rails 31 and the slide plate 32 and fits together. The side rails 31 are fixed on the top two sides of the support frame 2, and the slide plate 32 can slide inside the side rails 31, realizing flexible and convenient connection and disassembly between the mounting component 3 and the support frame 2. The fixing screw 33 connected by threads can stably fix the slide plate 32 inside the side rails 31, ensuring the firmness of the installation. When it is necessary to inspect or maintain the relevant parts, simply loosen the fixing screw 33 to easily pull the slide plate 32 out of the side rails 31, improving the convenience of operation.

[0028] refer to Figures 1-3 The fixing screw 33 is a hand-tightening screw. The overall cross-sectional shape of the slide plate 32 and the inner cross-sectional shape of the side rail 31 are both convex. Setting the fixing screw 33 as a hand-tightening screw makes the operation simpler and faster, and the tightening and loosening operations can be easily performed without the aid of tools, which greatly improves the convenience of use. The cross-sectional shape of the slide plate 32 and the side rail 31 are both designed as convex. This shape enhances the stability and guidance of the slide plate 32 when sliding in the side rail 31, ensuring that it can move smoothly and is not easy to shake or deviate. On the other hand, it can also better achieve the fit and connection between the two, effectively preventing the slide plate 32 from accidentally falling off the side rail 31, and ensuring the stability and reliability of the installation structure.

[0029] refer to Figure 1 The suction assembly 6 includes a sealing cover 61 and a side plate 62. The sealing cover 61 is fixedly installed on the top of the slide plate 32. An air guide 63 is fixedly installed on the top of the sealing cover 61. A hose 64 is fixedly installed on the top of the air guide 63. The side plate 62 is fixedly installed on the upper end of the support frame 2 on the side away from the suction fan 92. An electric push rod 65 is fixedly installed on the bottom of the side plate 62. An air suction pipe 66 is fixedly installed through the side plate 62. An air suction hopper 67 is fixedly installed at the outer end of the air suction pipe 66. The air suction pipe 66 and the hose 64 are connected. The bottom of the air suction hopper 67 is connected through the sealing cover 61 and the interior of the filter box 4. The sealing cover 61 is fixed to the slide plate 32 to ensure a tight connection. The air suction hopper 67 on the top, together with the hose 64 on the top, can effectively collect air. The electric push rod 65 on the side plate 62 can drive the suction pipe 66 and the suction hopper 67 to move up and down, thereby realizing flexible adjustment of the suction position to adapt to different working scenarios and needs, greatly improving the adaptability and versatility of the device. The combined design of the suction pipe 66 and the suction hopper 67 ensures high suction efficiency and is connected to the inside of the filter box 4, which can promptly introduce dust-laden air into the filter box 4 for treatment, ensuring the continuity and effectiveness of dust removal work.

[0030] refer to Figure 1The filter box 4 is cylindrical in shape, while the discharge hopper 8 is conical. Mounting holes 11 are provided at the four corners of the top of the base 1. These mounting holes 11 are countersunk. The cylindrical shape of the filter box 4 provides good space utilization, resulting in a more regular internal space that facilitates uniform air filtration and flow. It is also aesthetically pleasing. The conical design of the discharge hopper 8 better guides material accumulation and discharge, preventing material buildup and ensuring smooth and efficient discharge. The countersunk mounting holes 11 at the four corners of the top of the base 1 facilitate stable installation of the entire device. The countersunk design ensures a smooth surface after installation, without affecting the overall stability and appearance of the device. Installation is also convenient and secure. These detailed designs fully consider the functionality of the device.

[0031] refer to Figure 4 The cleaning frame 7 includes an inner support 71, which is fixedly installed at the bottom of the sealing cover 61. The lower end of the inner support 71 is inserted into the upper end of the filter cylinder 5. A drive motor 72 is fixedly installed at the top of the inner support 71. A rotating shaft 73 is fixedly installed through the inner support 71. A scraper auger 74 is fixedly installed at the bottom of the rotating shaft 73. The inner support 71 is fixed to the bottom of the sealing cover 61, ensuring the overall stability of the cleaning frame 7. Its lower end is inserted into the upper end of the filter cylinder 5, which can accurately clean the inside of the filter cylinder 5. The drive motor 72 provides power for the cleaning work, realizing automated cleaning without manual intervention, thus improving cleaning efficiency. The drive motor 72 drives the rotating shaft 73 and the scraper auger 74 to rotate. The scraper auger 74 can effectively scrape the bottom of the filter cylinder 5, preventing dust and other impurities from accumulating at the bottom and being difficult to clean. This ensures the filtration effect and unobstructed flow of the filter cylinder 5, thereby maintaining the good dust removal performance of the entire device and ensuring its long-term stable operation.

[0032] refer to Figure 4A scraper frame 75 is fixedly installed at equal intervals on the upper part of the outer surface of the rotating shaft 73. The outer side of the scraper frame 75 is in close contact with the inner wall of the filter cylinder 5. The scraper hinge 74 is conical in shape, and the bottom of the filter cylinder 5 is also conical. The bottom of the scraper hinge 74 is in close contact with the bottom of the filter cylinder 5. The scraper frames 75, which are evenly spaced on the outer surface of the rotating shaft 73, can thoroughly scrape and clean the inner wall of the filter cylinder 5, ensuring that all parts of the inner wall of the filter cylinder 5 are effectively cleaned and preventing dust accumulation. The residual accumulation of dust and impurities maintains a good filtration effect. The scraper hinge 74 is conical and fits into the conical shape at the bottom of the filter cylinder 5. This shape matching allows the scraper hinge 74 to fit tightly against the bottom of the filter cylinder 5 for cleaning, effectively removing stubborn deposits at the bottom and further improving the cleaning effect. The synergistic effect of the scraper hinge 74 and the scraper frame 75 realizes all-round cleaning and maintenance of the filter cylinder 5, ensuring the normal operation of the device and dust removal efficiency, and extending the service life of the filter cylinder 5.

[0033] Operating principle and advantages: By setting up the purification mechanism 9, the device can start the suction fan 92 during use. The suction fan 92 generates negative pressure suction inside the filter box 4. At this time, it can draw in external air through the hose 64, suction pipe 66 and suction hopper 67, and then draw in the air along with dust into the filter screen cylinder 5 inside the filter box 4. During this period, by starting the electric push rod 65, the suction pipe 66 and suction hopper 67 can be moved up and down, which can flexibly adjust the height of the suction and dust removal, and enhance the adaptability of the device during use. In addition, during the filtration process, the filtered air enters the purification box 91. The activated carbon filter element 93 inside the purification box 91 works together to filter and screen, which can remove harmful substances in the purified air and prevent harmful substances in the air from causing harm to the external environment. This can improve the overall air purification and dust filtration performance of the device during use.

[0034] By setting up the cleaning frame 7, during the use of this device for air purification and dust removal, dust is filtered by the filter cylinder 5 and adheres to the inside of the filter cylinder 5. At this time, the drive motor 72 is started and runs, driving the rotating shaft 73 to rotate. The rotation of the rotating shaft 73 drives the scraper auger 74 and the scraper frame 75 to rotate. The scraper frame 75 scrapes and cleans the upper part of the inner wall of the filter cylinder 5, while the scraper auger 74 rotates against the bottom of the filter cylinder 5 to brush and clean the bottom of the filter cylinder 5. This can prevent dust from adhering to the inner wall of the filter cylinder 5 and causing blockage during the purification and dust removal process. In addition, after the purification and filtration are completed, the discharge valve 10 can be opened. At this time, as the scraper auger 74 rotates, it can help to convey the filtered dust in the filter cylinder 5. The dust can then be discharged directly through the discharge valve 10. This allows the entire device to be cleaned without removing the filter cylinder 5, enabling the entire device to be cleaned and maintained quickly, and improving the overall ease of use of the device.

[0035] By incorporating the purification mechanism 9 and the mounting component 3, the device can be disassembled and repaired during use. By turning the fixing screw 33, the sliding plate 32 can be pulled out from the inside of the side rail 31, allowing the sealing cover 61 to be removed from the top of the filter box 4. After removing the sealing cover 61, the entire suction assembly 6 and cleaning frame 7 can be removed from the filter box 4. This also facilitates opening the top of the filter box 4 for further cleaning and maintenance of the filter box 4 and its inner filter cylinder 5, as well as the suction assembly 6 and cleaning frame 7. During maintenance, the sealing plate 94 is magnetically attached to the top of the purification box 91 using a magnetic plate 95. When disassembly is required, the activated carbon filter element 93 can be removed simply by prying the sealing plate 94. This makes it easy to replace the activated carbon filter element 93. At the same time, the negative pressure generated by the suction fan 92 during operation can stably attach the sealing plate 94 to the top of the purification box 91, giving the device strong stability during purification. It is also easy to disassemble, assemble, maintain, and repair during the adsorption purification process, which can improve the overall ease of use of the device.

Claims

1. A dust collection device for coated sand core making process, comprising a base (1), characterized in that: A support frame (2) is fixedly installed on the top of the base (1). An installation assembly (3) is fixedly installed on both sides of the top of the support frame (2). A filter box (4) is fixedly installed on the inner side of the support frame (2). A filter screen cylinder (5) is fixedly installed inside the filter box (4). A suction assembly (6) is fixedly installed on the top of the installation assembly (3). A cleaning frame (7) is fixedly installed at the bottom of the suction assembly (6). The cleaning frame (7) is inserted into the inner side of the filter screen cylinder (5). A discharge hopper (8) is fixedly installed at the bottom of the filter box (4). A discharge valve (10) is fixedly installed at the bottom of the discharge hopper (8). The top input end of the discharge valve (10) is connected to the bottom of the filter screen cylinder (5). A purification mechanism (9) is fixedly installed on one side of the filter box (4). The purification mechanism (9) includes a purification box (91), which is fixedly installed on one side of the filter box (4). An activated carbon filter element (93) is inserted into the inner side of the purification box (91). A sealing plate (94) is fixedly connected to the top of the activated carbon filter element (93). Magnetic suction plates (95) are fixedly installed at both ends of the bottom of the sealing plate (94). The inner side of the magnetic suction plate (95) is magnetically connected to the outer side of the purification box (91). A suction fan (92) is fixedly installed on the outer side of the purification box (91). The input end of the suction fan (92) is connected to the inside of the purification box (91). The inner side of the purification box (91) is connected to the inside of the filter box (4).

2. The dust collection device for the coated sand core making process according to claim 1, characterized in that: The mounting assembly (3) includes a side rail (31), which is fixedly installed on both sides of the top of the support frame (2). A sliding plate (32) is slidably connected inside the side rail (31). The top of the sliding plate (32) is fixedly connected to the bottom of the mounting assembly (3). A fixing screw (33) is threadedly connected to the upper outer side of the side rail (31). The end of the fixing screw (33) passes through the side rail (31) and the outer side of the sliding plate (32) and fits together.

3. The dust collection device for the coated sand core making process according to claim 2, characterized in that: The fixing screw (33) is a hand-tightening screw, and the overall cross-sectional shape of the slide plate (32) and the inner cross-sectional shape of the side rail (31) are both set as convex.

4. The dust collection device for the coated sand core making process according to claim 1, characterized in that: The suction assembly (6) includes a sealing cover (61) and a side plate (62). The sealing cover (61) is fixedly installed on the top of the slide plate (32). A guide hopper (63) is fixedly installed on the top of the sealing cover (61). A hose (64) is fixedly installed on the top of the guide hopper (63). The side plate (62) is fixedly installed on the upper end of the support frame (2) away from the suction fan (92). An electric push rod (65) is fixedly installed at the bottom of the side plate (62). A suction pipe (66) is fixedly installed through the side plate (62). A suction hopper (67) is fixedly installed at the outer end of the suction pipe (66). The suction pipe (66) and the hose (64) are connected. The bottom of the suction hopper (67) is connected through the sealing cover (61) and the interior of the filter box (4).

5. The dust collection device for the coated sand core making process according to claim 4, characterized in that: The filter box (4) is cylindrical in shape, the discharge hopper (8) is conical in shape, and the base (1) has mounting holes (11) at the four corners of the top. The mounting holes (11) are countersunk holes.

6. The dust collection device for the coated sand core making process according to claim 5, characterized in that: The cleaning frame (7) includes an inner support (71), which is fixedly installed at the bottom of the sealing cover (61). The lower end of the inner support (71) is inserted into the upper end of the filter screen cylinder (5). A drive motor (72) is fixedly installed at the top of the inner support (71). A rotating shaft (73) is fixedly installed through the inner support (71) at the output end of the drive motor (72). A scraper hinge (74) is fixedly installed at the bottom of the rotating shaft (73).

7. The dust collection device for the coated sand core making process according to claim 6, characterized in that: The upper surface of the rotating shaft (73) is fixedly equipped with scraper frames (75) at equal intervals. The outer side of the scraper frame (75) is in close contact with the inner wall of the filter cylinder (5). The scraper hinge (74) is cone-shaped. The bottom of the filter cylinder (5) is also cone-shaped. The bottom of the scraper hinge (74) is in close contact with the bottom of the filter cylinder (5).

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