A slip-resistant, stain-resistant flexible decorative sheet and method of making the same

Abstract

The present application relates to the field of flexible decorative sheet production, and particularly discloses a smooth and stain-resistant flexible decorative sheet and a manufacturing method thereof, which comprises a decorative sheet body and a smooth and wear-resistant layer coated on the upper part of the decorative sheet body; the decorative sheet body comprises the following components in mass percentage: inorganic mineral filler 30-50%, acrylic emulsion 10-25%, pigment 0-5%, water 0-15%, water-retaining agent 0-3%, quartz sand 25-55% and activated carbon particles 3-15%; the smooth and wear-resistant layer comprises the following components in weight percentage: feldspar 30-40 parts, potassium feldspar 11-14 parts, quartz sand 7-14 parts, aluminum oxide 6-8 parts, talc 5-10 parts, dolomite 10-20 parts, wollastonite 6-13 parts, nano antibacterial powder 7-15 parts and building coating emulsion 5-7 parts. Compared with the existing process, the flexible decorative sheet has a flexibility of 15% higher, is not easy to be damaged during installation and use, and can be used for buildings in different environments. The smooth and wear-resistant layer has good smoothness, and external stains are not easy to adhere to the outside of the decorative sheet.

Description

Technical Field

[0001] This invention relates to a flexible decorative sheet, specifically to a smooth, stain-resistant flexible decorative sheet and its manufacturing method, belonging to the field of flexible decorative sheet processing. Background Technology

[0002] Flexible decorative panels are a type of building material, often used to install on the exterior of building walls for decorative and aesthetic purposes.

[0003] Because decorative panels are located on the exterior of exterior walls and are constantly exposed to the natural environment, the air contains a large amount of dust and other impurities. These impurities adhere to the exterior of the panels, affecting their aesthetics. Furthermore, the ambient temperature fluctuates with the seasons, and the panels' insufficient flexibility makes them prone to detaching from the wall. During use, the external decorative layer is easily scratched and damaged, significantly impacting its lifespan due to environmental factors. New decorative panels developed in laboratories require multiple tests to determine their performance. Currently, existing decorative panels, after being manufactured in laboratories, lack standardized and efficient testing equipment, necessitating repeated testing with various devices. This results in low testing efficiency and an inability to simulate various parameters in the natural environment, leading to inaccurate test results. Summary of the Invention

[0004] To address the problems in the prior art, this invention provides a smooth, stain-resistant flexible decorative sheet and its manufacturing method.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A smooth, stain-resistant flexible decorative sheet includes a decorative sheet body and a smooth, wear-resistant coating on its upper part;

[0007] The decorative sheet body comprises the following components by weight percentage: 30-50% inorganic mineral filler, 10-25% acrylic emulsion, 0-5% pigment, 0-15% water, 0-3% water-retaining agent, 25-55% quartz sand, and 3-15% activated carbon particles;

[0008] The smooth wear-resistant layer comprises the following components by weight: 30-40 parts feldspar, 11-14 parts potassium feldspar, 7-14 parts quartz sand, 6-8 parts alumina, 5-10 parts talc, 10-20 parts dolomite, 6-13 parts wollastonite, 7-15 parts nano antibacterial powder, and 5-7 parts architectural coating emulsion.

[0009] The nano antibacterial powder is nano silver, and the inorganic mineral filler is one or more of calcium oxide, calcium carbonate, and silicon oxide.

[0010] Preferably, the architectural coating emulsion includes polyvinyl alcohol emulsion, polyvinyl acetate emulsion, chlorinated polyethylene emulsion, chlorosulfonated polyethylene emulsion, acrylate emulsion, styrene-acrylic emulsion, ethylene-propylene emulsion, and chlorovinylidene emulsion.

[0011] A method for manufacturing a smooth, stain-resistant flexible decorative sheet includes the following steps:

[0012] S1: Mix all components in the decorative sheet body formula evenly to form a mixed slurry; spray the decorative sheet body slurry onto the surface of the molding mold with a coating thickness of 2-7mm;

[0013] S2: Place the molding mold coated with the decorative sheet body slurry in a 100-150℃ heat and dry it to form the decorative sheet body;

[0014] S3: Mix all components in the slip-resistant layer formula evenly to form a slip-resistant layer slurry; then coat the slip-resistant layer slurry onto the molded decorative sheet body with a coating thickness of 1-4mm.

[0015] S4: The decorative sheet body coated with the smooth wear-resistant layer slurry in S3, together with the molding mold, is heated, dried, cured and demolded at 100-150℃ to form a smooth and stain-resistant flexible decorative sheet.

[0016] S5: The abrasion resistance, stain resistance, and flexibility of the smooth, stain-resistant flexible decorative sheet produced in S4 are tested.

[0017] Preferably, the finished smooth, stain-resistant flexible decorative sheet is placed into a testing device for testing; the testing device includes a base plate, and support frames are installed on both sides of the bottom center of the base plate. The base plate is rotatably installed between the two support frames via a rotating shaft.

[0018] The base plate has slide rails fixedly connected to both sides of its top. Side seats are slidably mounted on the upper part of the slide rails, and side plates are mounted on the top of the side seats. Two first electric telescopic columns are installed between the bottom of the side plates and the top of the side seats. A mounting plate is installed between the tops of the two side plates, and spraying mechanisms are installed at both ends of the bottom of the mounting plate. A drive shaft and a grinding roller are also installed at the bottom of the mounting plate between the two spraying mechanisms.

[0019] The drive shaft is rotatably mounted between two second pads. The upper end of the second pad is connected to the first pad. A pressure sensor is installed between the second pad and the first pad. Several slitting plates are connected to the outside of the drive shaft. Several recessed holes for slitting plate insertion are provided on the outside of the drive shaft.

[0020] Both ends of the grinding roller are rotatably mounted with first pads, and a dust collection box is mounted on the bottom of the mounting plate on one side of the grinding roller.

[0021] The spraying mechanism includes a main pipe, with first pads rotatably connected to both ends of the main pipe. Several water spray pipes are connected to one side of the main pipe. Two third electric telescopic columns are installed between the top of the first pads at both ends of the main pipe, the drive shaft, and the mounting plate. A water storage tank and a material storage tank are installed at the top two ends of the mounting plate, respectively. The main pipes at the bottom two ends are connected to the water storage tank and the material storage tank through connecting pipes.

[0022] A detachable end plate is installed at one end of the mounting plate, and several flatness testers are installed below the end plate. One side of the end plate is connected to the mounting plate by two fixing rods.

[0023] A support plate is installed on the top of the base plate below the mounting plate. A detachable top plate is installed on the top of the support plate. Insert rods are vertically connected to the bottom of the top plate around the perimeter. Several insertion holes for inserting the rods are provided on both sides of the top of the support plate.

[0024] The top of the top plate has an inner groove, and a filter screen is installed at the bottom of the inner groove. A movable plate is slidably installed on one side of the inner groove. Two second electric telescopic columns are installed between one side of the movable plate and the inner side wall of the inner groove. Two guide grooves are provided on the upper part of the filter screen along the width direction. The bottom ends of the movable plate are connected to second sliders that are adapted to the guide grooves. One end of the inner groove passes through the end of the top plate. A push plate is slidably installed on the other end of the top plate near the inner groove. The top of the filter screen near the push plate is also provided with a guide groove along the length of the filter screen. The bottom of the push plate is connected to a first slider that is adapted to the guide groove. A handle is connected to the top of the push plate, and a tension spring is connected between the push plate and the end of the top plate. An elastic telescopic column is vertically installed on the top of the support plate at the end away from the push plate, and a waste hopper is installed on the end of the support plate away from the push plate.

[0025] The beneficial effects of this invention are:

[0026] 1. The decorative panels produced using the formula in this invention exhibit superior flexibility, exceeding that of panels produced by existing processes by 15%. During installation and use, the panels are less prone to damage and can adapt to various building environments. Furthermore, the resulting smooth, wear-resistant layer possesses excellent smoothness, preventing external stains from easily adhering to the surface of the decorative panel, thus enhancing its stain resistance by 20%. It also boasts high abrasion resistance, making it less susceptible to damage from scratches. The use of activated carbon granules as a raw material provides excellent breathability and water absorption, and also effectively absorbs odors during use.

[0027] 2. By setting up testing equipment, the decorative sheets to be tested can be placed on top of the filter screen after production. The testing equipment can assess the flatness, flexibility, stain resistance, scratch resistance, and ease of repair during use. Multiple tests can be performed on a single device, improving testing efficiency and making the testing more scientific. This allows for comprehensive testing of the decorative sheets, and the test results are more suitable for subsequent working environments. Attached Figure Description

[0028] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 This is a schematic diagram of the top plate structure of the present invention.

[0031] Figure 3 This is a schematic diagram of the pusher plate structure of the present invention.

[0032] Figure 4 This is a schematic diagram of the movable plate structure of the present invention.

[0033] Figure 5 This is a schematic diagram of the mounting plate structure of the present invention.

[0034] Figure 6 This is a schematic diagram of the second pad structure of the present invention.

[0035] In the diagram: 1. Support frame; 2. Base plate; 3. Slide rail; 4. Waste hopper; 5. Filter screen; 6. Flatness tester; 7. Elastic telescopic column; 8. Storage box; 9. Mounting plate; 10. Water tank; 11. Top plate; 12. Bearing plate; 13. Side seat; 14. First electric telescopic column; 15. Side plate; 16. Push plate; 17. Guide groove; 18. Insertion hole; 19. Tension spring; 20. Handle; 21. First slider; 22. Second electric telescopic column; 23. Moving plate; 24. Second slider; 25. First pad; 26. Connecting pipe; 27. Water spray pipe; 28. Main pipe; 29. ​​Second pad; 30. Grinding roller; 31. Dust collection box; 32. Third electric telescopic column; 33. End plate; 34. Fixing rod; 35. Pressure sensor; 36. Sliding plate; 37. Drive shaft. Detailed Implementation

[0036] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figure 1-6 As shown, a smooth, stain-resistant flexible decorative sheet includes a decorative sheet body and a smooth, wear-resistant layer coated on its upper part;

[0038] The decorative sheet body comprises the following components by weight percentage: 30-50% inorganic mineral filler, 10-25% acrylic emulsion, 0-5% pigment, 0-15% water, 0-3% water-retaining agent, 25-55% quartz sand, and 3-15% activated carbon particles;

[0039] The wear-resistant surface layer comprises the following components by weight: 30-40 parts feldspar, 11-14 parts potassium feldspar, 7-14 parts quartz sand, 6-8 parts alumina, 5-10 parts talc, 10-20 parts dolomite, 6-13 parts wollastonite, 7-15 parts nano antibacterial powder, and 5-7 parts architectural coating emulsion.

[0040] The nano antibacterial powder is nano silver, and the inorganic mineral filler is one or more of calcium oxide, calcium carbonate, and silicon oxide.

[0041] As a technical optimization of the present invention, the architectural coating emulsion includes polyvinyl alcohol emulsion, polyvinyl acetate emulsion, chlorinated polyethylene emulsion, chlorosulfonated polyethylene emulsion, acrylate emulsion, styrene-acrylic emulsion, ethylene-propylene emulsion, and chlorovinylidene ester emulsion.

[0042] A method for manufacturing a smooth, stain-resistant flexible decorative sheet includes the following steps:

[0043] S1: Mix all components in the decorative sheet body formula evenly to form a mixed slurry; spray the decorative sheet body slurry onto the surface of the molding mold with a coating thickness of 2-7mm;

[0044] S2: Place the molding mold coated with the decorative sheet body slurry in a 100-150℃ heat and dry it to form the decorative sheet body;

[0045] S3: Mix all components in the slip-resistant layer formula evenly to form a slip-resistant layer slurry; then coat the slip-resistant layer slurry onto the molded decorative sheet body with a coating thickness of 1-4mm.

[0046] S4: The decorative sheet body coated with the smooth wear-resistant layer slurry in S3, together with the molding mold, is heated, dried, cured and demolded at 100-150℃ to form a smooth and stain-resistant flexible decorative sheet.

[0047] S5: The abrasion resistance, stain resistance, and flexibility of the smooth, stain-resistant flexible decorative sheet produced in S4 are tested.

[0048] As a technical optimization of the present invention, the finished smooth and stain-resistant flexible decorative sheet is placed into a testing device for testing; the testing device includes a base plate 2, and support frames 1 are installed on both sides of the bottom middle of the base plate 2. The base plate 2 is rotatably installed between the two support frames 1 via a rotating shaft.

[0049] The top two sides of the base plate 2 are fixedly connected to slide rails 3. The upper part of the slide rail 3 is slidably mounted with a side seat 13. The top of the side seat 13 is mounted with a side plate 15. Two first electric telescopic columns 14 are installed between the bottom of the side plate 15 and the top of the side seat 13. The top of the two side plates 15 is mounted with an installation plate 9. Spraying mechanisms are installed at both ends of the bottom of the installation plate 9. A drive shaft 37 and a grinding roller 30 are also installed between the two spraying mechanisms at the bottom of the installation plate 9.

[0050] The drive shaft 37 is rotatably mounted between two second pads 29. The upper end of the second pad 29 is connected to the first pad 25. A pressure sensor 35 is installed between the second pad 29 and the first pad 25. Several slitting plates 36 are connected to the outside of the drive shaft 37. Several recessed holes for inserting the slitting plates 36 are provided on the outside of the drive shaft 37.

[0051] Both ends of the grinding roller 30 are rotatably mounted with first pads 25, and a dust collection box 31 is mounted on the bottom of the mounting plate 9 on one side of the grinding roller 30.

[0052] The spraying mechanism includes a main pipe 28, with first pads 25 rotatably connected to both ends of the main pipe 28. Several water spray pipes 27 are connected to one side of the main pipe 28. Two third electric telescopic columns 32 are installed between the top of the first pads 25 at both ends of the main pipe 28, the drive shaft 37, and the grinding roller 30 and the mounting plate 9. A water storage tank 10 and a material storage tank 8 are installed at the top two ends of the mounting plate 9, respectively. The main pipes 28 at both ends of the bottom are connected to the water storage tank 10 and the material storage tank 8 through connecting pipes 26, respectively.

[0053] A detachable end plate 33 is installed at one end of the mounting plate 9. Several flatness testers 6 are installed below the end plate 33. One side of the end plate 33 is connected to the mounting plate 9 by two fixing rods 34.

[0054] A support plate 12 is installed on the top of the base plate 2 below the mounting plate 9. A detachable top plate 11 is installed on the top of the support plate 12. Insert rods are vertically connected to the bottom of the top plate 11. Several insertion holes 18 for inserting the insert rods are provided on both sides of the top of the support plate 12.

[0055] The top of the top plate 11 has a recessed groove, and a filter screen 5 is installed at the bottom of the recessed groove. A movable plate 23 is slidably installed on one side of the inside of the recessed groove. Two second electric telescopic columns 22 are installed between one side of the movable plate 23 and the inner side wall of the recessed groove. Two guide grooves 17 are provided on the upper part of the filter screen 5 along the width direction. The bottom ends of the movable plate 23 are connected to second sliders 24 that are adapted to the guide grooves 17. One end of the recessed groove passes through the end of the top plate 11, and the other end of the top plate 11 is close to the recessed groove. A push plate 16 is slidably installed on one side. A guide groove 17 is also provided along the length of the filter screen 5 at the top end near the push plate 16. A first slider 21 adapted to the guide groove 17 is connected to the bottom of the push plate 16. A handle 20 is connected to the top of the push plate 16. A tension spring 19 is connected between the end of the push plate 16 and the top plate 11. An elastic telescopic column 7 is vertically installed on the top of the support plate 12 at the end away from the push plate 16. A waste hopper 4 is installed on the end of the support plate 12 away from the push plate 16.

[0056] Example 1: Calcium carbonate 31%, acrylic emulsion 20%, pigment 3%, water 10%, water-retaining agent 2%, quartz sand 30%, and activated carbon particles 4%;

[0057] Feldspar 34 parts, potassium feldspar 12 parts, quartz sand 13 parts, alumina 8 parts, talc 10 parts, dolomite 10 parts, wollastonite 12 parts, nano silver 10 parts, perchloroethylene emulsion 5 parts.

[0058] The decorative sheet body and the smooth wear-resistant layer slurry are made according to the above proportions. The thickness of the decorative sheet body is 4mm. Then, the smooth wear-resistant layer is coated on the decorative sheet body with a coating thickness of 3mm. It is dried at 120℃ and demolded to become a flexible decorative sheet.

[0059] Example 2: Calcium oxide 35%, acrylic emulsion 18%, pigment 4%, water 10%, water-retaining agent 3%, quartz sand 33%, and activated carbon particles 8%;

[0060] Feldspar 36 parts, potassium feldspar 11 parts, quartz sand 10 parts, alumina 7 parts, talc 10 parts, dolomite 15 parts, wollastonite 10 parts, nano silver 12 parts, acrylate emulsion 6 parts.

[0061] The decorative sheet body and the smooth wear-resistant layer slurry are made according to the above proportions. The thickness of the decorative sheet body is 7mm. Then, the smooth wear-resistant layer is coated on the decorative sheet body with a coating thickness of 4mm. It is dried at 115℃ and demolded to become a flexible decorative sheet.

[0062] When testing a fabricated decorative sheet, place the decorative sheet to be tested on the upper part of the filter screen 5. When placing the decorative sheet, press the elastic telescopic column 7 so that the elastic telescopic column 7 does not affect the placement of the decorative sheet on the filter screen 5. Then, push the decorative sheet towards the push plate 16 until the end of the decorative sheet contacts the push plate 16. The moving plate 23 squeezes the decorative sheet from the side, enabling the decorative sheet to be stably placed on the filter screen 5 and not prone to shaking. Install the end plate 33 at one end of the mounting plate 9. Then, the first electric telescopic column 14 contracts downward, driving the mounting plate 9 to move downward until the test end at the bottom of the flatness tester 6 contacts the top of the decorative sheet. Subsequently, the side seat 13 slides on the slide rail 3 through the electric slider at the bottom, thereby driving the mounting plate 9 and the end plate 33 to move on the top of the decorative sheet. The flatness tester 6 moves on the decorative sheet, and the flatness of the top of the decorative sheet is judged by the change of the value measured by the flatness tester 6. If the flatness reaches the preset value, it is qualified. Measuring simultaneously with multiple flatness testers 6 is more accurate, and through movement, comprehensive measurement can be carried out on the upper part of the decorative sheet, and the measurement result is more precise, which can better judge the flatness of the decorative sheet.

[0063] When testing the flexibility of the decorative sheet, the second electric telescopic column 22 pushes the moving plate 23 to move on the upper part of the filter screen 5. The moving plate 23 squeezes the decorative sheet, and the decorative sheet undergoes bending deformation after being subjected to the squeezing force. The flexibility of the decorative sheet is tested by different bending degrees and the number of bending deformations. After reaching the preset number of test times and bending degree, it is determined whether the fabricated decorative sheet meets the requirements. The bending force, bending range, and number of bends during the test can all be freely controlled, improving the test efficiency and making the test more scientific. When the moving plate 23 moves, the second slider 24 at the bottom moves inside the guide groove 17, making the movement of the moving plate 23 stable and not prone to changing direction.

[0064] When testing the stain resistance of the upper part of the decorative piece, wastewater containing different impurities is placed inside the storage tank 8 and then sprayed onto the upper part of the decorative piece through the main pipe 28 and the spray pipe 27. The wastewater stays on the upper part of the decorative piece for a preset time, and then the upper part of the decorative piece is wiped with a cloth to test whether the exterior of the decorative piece can be easily cleaned. Alternatively, the base plate 2 is rotated on the upper part of the support frame 1, causing the waste hopper 4 to rotate downwards, and the wastewater on the upper part of the decorative piece flows into the interior of the waste hopper 4 to test whether stains can adhere to the upper part of the decorative piece, thus determining the stain resistance of the decorative piece. Through different wastewater tests, the pollution encountered by the decorative piece in daily use can be simulated as much as possible, allowing the decorative piece to be comprehensively tested, and the test results are more suitable for the subsequent working environment. After the wastewater test, the cleaning water inside the water tank 10 can be sprayed onto the decorative piece through the main pipe 28 and the spray pipe 27 at the other end. The cleaning water cleans the exterior of the decorative piece, allowing rainwater to remove stains after the decorative piece is contaminated, thus determining the subsequent self-cleaning ability of the decorative piece.

[0065] When testing the scratch resistance of the decorative panel's exterior, the third electric telescopic column 32 drives the drive shaft 37 downwards until the scribbling plates 36 contact the upper part of the decorative panel. The drive motor then rotates the drive shaft 37, causing several scribbling plates 36 to scratch the upper part of the smooth wear-resistant layer. After the scribbling plates 36 contact the smooth wear-resistant layer, the pressure sensor 35 measures the pressure generated between the scribbling plates 36 and the smooth wear-resistant layer. The pressure between the scribbling plates 36 and the smooth wear-resistant layer is controlled by changing the distance between the drive shaft 37 and the smooth wear-resistant layer. The scratch resistance of the smooth wear-resistant layer is determined by the marks left by the scribbling plates 36 on the smooth wear-resistant layer. Furthermore, different types of scribbling plates 36 can be installed on the outside of the drive shaft 37 using recessed holes, allowing for testing of the decorative panel's scratch resistance against different objects. This more thorough testing yields results that better reflect actual usage environments.

[0066] The stain resistance can also be tested again after the decorative piece is scratched by the scratching plate 36, thus testing the stain resistance of the decorative piece after being scratched. After the decorative piece is scratched, the scratched area can be polished by the polishing roller 30, and the degree of repair after polishing can be used to test the difficulty of subsequent repair of the decorative piece. During the polishing process, the dust collection box 31 absorbs the debris generated by the polishing roller 30 to prevent the debris from polluting the external environment.

[0067] During the test, wastewater generated can fall through the filter screen 5 into the upper part of the support plate 12, and finally into the waste hopper 4 for storage, facilitating subsequent unified collection and treatment. When the base plate 2 is tilted, the elastic telescopic column 7 blocks the decorative piece at its end, making it less likely for the decorative piece to fall off during the test.

[0068] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A testing device for a smooth, stain-resistant flexible decorative sheet, characterized in that, Includes a base plate (2), and support frames (1) are installed on both sides of the bottom middle of the base plate (2). The base plate (2) is rotatably installed between the two support frames (1) via a rotating shaft. The top two sides of the base plate (2) are fixedly connected with slide rails (3). The upper part of the slide rail (3) is slidably mounted with a side seat (13). The top of the side seat (13) is mounted with a side plate (15). Two first electric telescopic columns (14) are installed between the bottom of the side plate (15) and the top of the side seat (13). The top of the two side plates (15) is mounted with a mounting plate (9). Spraying mechanisms are installed at both ends of the bottom of the mounting plate (9). A drive shaft (37) and a grinding roller (30) are also installed between the two spraying mechanisms at the bottom of the mounting plate (9). The drive shaft (37) is rotatably mounted between two second pads (29). The upper end of the second pad (29) is connected to the first pad (25). A pressure sensor (35) is installed between the second pad (29) and the first pad (25). Several slitting plates (36) are connected to the outside of the drive shaft (37). Several recessed holes for inserting the slitting plates (36) are provided on the outside of the drive shaft (37). Both ends of the grinding roller (30) are rotatably mounted with first pads (25), and a dust collection box (31) is mounted on one side of the bottom of the mounting plate (9); The spraying mechanism includes a main pipe (28), with first pads (25) rotatably connected to both ends of the main pipe (28), and several water spray pipes (27) connected to one side of the main pipe (28). Two third electric telescopic columns (32) are installed between the top of the first pads (25) at both ends of the main pipe (28), drive shaft (37), and grinding roller (30) and the mounting plate (9). A water storage tank (10) and a material storage tank (8) are installed at the top two ends of the mounting plate (9), respectively. The main pipes (28) at the bottom two ends are connected to the water storage tank (10) and the material storage tank (8) through connecting pipes (26), respectively. A detachable end plate (33) is installed at one end of the mounting plate (9). Several flatness testers (6) are installed below the end plate (33). One side of the end plate (33) is connected to the mounting plate (9) by two fixing rods (34). A support plate (12) is installed on the top of the base plate (2) below the mounting plate (9). A detachable top plate (11) is installed on the top of the support plate (12). Insert rods are vertically connected around the bottom of the top plate (11). Several insertion holes (18) for inserting the insert rods are provided on both sides of the top of the support plate (12). The top of the top plate (11) is provided with an inner groove, and a filter screen (5) is installed at the bottom of the inner groove. A movable plate (23) is slidably installed on one side of the inner groove. Two second electric telescopic columns (22) are installed between one side of the movable plate (23) and the inner side wall of the inner groove. Two guide grooves (17) are provided on the upper part of the filter screen (5) along the width direction. The bottom ends of the movable plate (23) are connected to second sliders (24) that are adapted to the guide grooves (17). One end of the inner groove passes through the end of the top plate (11), and the other end of the top plate (11) is slidably installed near the inner groove. The push plate (16) and the filter screen (5) are provided with a guide groove (17) along the length of the filter screen (5) at the top end near the push plate (16). The bottom of the push plate (16) is connected to a first slider (21) that is compatible with the guide groove (17). The top of the push plate (16) is connected to a handle (20). A tension spring (19) is connected between the end of the push plate (16) and the top plate (11). An elastic telescopic column (7) is vertically installed on the top of the support plate (12) at the end away from the push plate (16). A waste hopper (4) is installed on the end of the support plate (12) away from the push plate (16).

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