Production system and method of flexible paper-based abrasive paper

Abstract

The production system comprises a base, the base is connected with a production part, and the production part comprises a recycling box fixedly connected to the front side of the base; the gluing part is installed at the front end of the upper side of the base and comprises a supporting frame fixedly connected with the front side of the base, the upper side of the supporting frame is rotationally connected with a gluing roller, the top of the supporting frame is fixedly connected with a glue pump, and the glue outlet end of the glue pump is fixedly connected with a first three-way valve. The supporting frame is provided with a glue outlet piece connected with the lower end of the first three-way valve. According to the production system and method for the flexible paper-based abrasive paper, the double-shaft motor, the two sets of screw rods, the moving frame and the adjusting block are matched with one another, the internal space of the glue outlet shell is adjusted, the glue outlet end of the glue outlet shell is matched with the size of a paper base needing to be glued, the sliding frame, the limiting rod, the supporting roller and the air cylinder are matched, the paper base abuts against the gluing roller, and passing and limiting treatment of the paper base is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of sandpaper production, and in particular to a production system and method for flexible paper-based sandpaper. Background Art

[0002] During the production of sandpaper, a corresponding production system needs to be equipped. Referring to the authorization announcement number CN112692742A, a method for manufacturing flexible paper-based sandpaper and sandpaper include the following steps: S1, unwinding the paper-based substrate; S2, coating a base glue on the sand-planting surface of the substrate; S3, implanting abrasives on the coated base glue; S4, pre-drying to form a base glue layer, and humidifying after pre-drying; S5, coating a double glue on the base glue layer and the outside of the abrasive. As described in the above patent, when the existing production system of flexible paper-based sandpaper is used, most of the system function glue-coating ends are difficult to adjust the glue coating range according to the paper base required to be glued of the corresponding size, which affects the adaptability of the device and is prone to uneven coating and glue loss caused by glue overflow. It is also difficult to recover and utilize excess glue in time, which affects the glue coating efficiency and causes waste. Summary of the Invention

[0003] In response to the deficiencies of the prior art, the present invention provides a production system and method for flexible paper-based sandpaper, which solves the problem that the system is difficult to adjust the gluing range according to the corresponding size of the paper base to be glued, affecting the gluing efficiency and other problems.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A production system for flexible paper-based sandpaper includes a base, the base is connected to a production part for producing flexible paper-based sandpaper, the production part includes:

[0005] A recycling box is fixedly connected to the front side of the base to receive excess glue;

[0006] The top end of the support frame is connected with the bottom end of the support frame, and the bottom end of the support frame is connected with the bottom end of the support frame. The support frame is connected with the top end of the support frame, and the glue discharging end of the glue pump is fixedly connected to the first three-way valve. The glue discharging part includes a glue discharging shell fixedly connected to the support frame, the bottom end of the glue discharging shell is fixedly connected with a glue discharging plate that fits the surface of the glue roller, the middle end of the top end of the glue discharging shell is fixedly connected with a conduit fixedly connected to the first three-way valve, and the rear side of the glue discharging shell is installed with an adjusting part for adjusting the internal space of the glue discharging shell. The support frame is connected with a limiting part near the lower end of the glue discharging roller, and a switching part connected with the liquid extraction end of the glue pump is installed on the right side of the recovery box;

[0007] An electrostatic sand planting machine is fixedly connected to the middle end of the upper side of the base for planting sand on the paper base;

[0008] Drying piece, fixedly connected to the rear side of the base for drying paper base;

[0009] Single-shaft motor, fixedly connected to the left side of the support frame for driving the glue roller.

[0010] Preferably, the single-shaft motor output end is coaxially fixedly connected with the glue roller, and the glue applying piece comprises an air compressor fixedly connected with the support frame and having an exhaust end fixedly connected with the left side of the first three-way valve.

[0011] Preferably, the adjusting piece comprises two groups of adjusting blocks in sliding connection with the inner side of the glue discharging shell, the bottom of each group of adjusting blocks is in abutment with the top of the glue discharging plate, the adjusting block away from the middle part of the glue discharging shell is fixedly connected with a moving frame in sliding connection with the glue discharging shell, the rear side of the glue discharging shell is fixedly connected with a double-shaft motor, the output ends on both sides of the double-shaft motor are coaxially fixedly connected with two groups of screw rods with opposite screw directions, and the two groups of screw rods are in threaded connection with the two groups of moving frames, respectively.

[0012] Preferably, the limiting piece comprises a sliding frame in sliding connection with the support frame, the rear end of the sliding frame is fixedly connected with two groups of limiting rods in sliding connection with the sliding frame, the front side of the sliding frame close to the glue roller is rotatably connected with a support roller between the glue roller and the recovery box, and the base is fixedly connected with an air cylinder with an elongated end fixedly connected with the sliding frame.

[0013] Preferably, the switching piece comprises a liquid suction pipe fixedly connected with the liquid suction end of the glue pump, the bottom of the liquid suction pipe is fixedly connected with a second three-way valve for switching the direction of glue suction, the left side of the second three-way valve is fixedly connected with a liquid suction block fixedly connected with the right side of the recovery box, the right side of the second three-way valve is fixedly connected with a branch pipe for sucking glue liquid from the outside, and the rear side of the base close to the recovery box is fixedly connected with a liquid level sensor.

[0014] Preferably, the drying piece comprises a dryer fixedly connected with the base, a group of guide rollers are rotatably connected to the front side and the rear side of the dryer, respectively, a condenser is fixedly connected to the top right side of the dryer, the suction end of the condenser is fixedly connected with the middle end of the top of the dryer, the exhaust end of the condenser is fixedly connected with a filter tank with an active carbon mesh arranged therein, and the top left side of the dryer is fixedly connected with a suction pump with a suction end fixedly connected with the filter tank.

[0015] The application further discloses a production method of the production system based on the flexible paper-based sandpaper.

[0016] Step 1: The user moves the flexible paper base between the paper gluing roller and the support roller. The cylinder drives the slide frame and the support roller to move vertically, and the support roller presses the paper base under the gluing roller. The paper base passes through the electrostatic sand planting machine and is then guided into the dryer through the guide roller. The dual-axis motor adjusts the internal space of the glue output shell through two sets of screws, a moving frame, and an adjusting block to match the internal space of the glue output shell with the corresponding size of the paper base.

[0017] Step 2. After the position of the adjusting block is adjusted in step 1, the paper base is transmitted through the external transmission part. The glue pump extracts glue from the external liquid supply end through the liquid extraction pipe, the second three-way valve, and the branch pipe. The glue is applied to the corresponding area on the surface of the glue roller through the first three-way valve, the guide tube, the glue outlet shell, the two sets of adjusting blocks, and the glue outlet plate. The glue roller applies the glue to the surface of the paper base, and the excess glue falls into the recovery box. When the glue-coated paper base enters the electrostatic sand-planting machine, the electrostatic sand-planting machine performs sand-planting on the glue-coated paper base. When the sand-planted paper base is introduced into the dryer through the guide roller, the sand-planted paper base is dried in the dryer.

[0018] Step 3. In step 2, the vacuum pump extracts air from the dryer through the filter tank and condenser. When the gas passes through the condenser, the condenser cools the gas. When the cooled gas passes through the filter tank, the activated carbon net in the filter tank adsorbs the organic matter in the gas.

[0019] Preferably, in step 2, an external liquid level sensor detects the liquid level of the recovery box. When the amount of glue in the recovery box is appropriate, the second three-way valve is reversed. At this time, the glue pump extracts the glue in the recovery box through the liquid extraction pipe, the second three-way valve, and the liquid extraction block.

[0020] Beneficial effects

[0021] The present invention provides a system and method for producing flexible paper-based sandpaper. Compared with the prior art, it has the following advantages:

[0022] (1) The production system and method of the flexible paper-based sandpaper are provided with a gluing part in the system, and a dual-axis motor, two sets of screws, a movable frame and an adjusting block are coordinated with each other to adjust the internal space of the glue-discharging shell, so that the glue-discharging end of the glue-discharging shell matches the size of the paper base to be coated with glue, thereby improving the adaptability of the device to the size of the paper base. The sliding frame, the limiting rod, the supporting roller and the cylinder are coordinated to press the paper base against the gluing roller, which helps the paper base pass through the limiting process. During the paper base conveying process, the glue pump, the first three-way valve, the glue-discharging shell, the glue-discharging plate, the conduit, the gluing roller and the supporting roller are coordinated to coat the paper base with glue. The liquid extraction pipe, the second three-way valve, the liquid extraction block and the branch pipe are coordinated to switch the glue extraction position as required, which helps the recycling of the glue liquid.

[0023] (2) The production system and method of the flexible paper-based sandpaper are as follows: an air compressor is set in the system. During the interval of sandpaper production, the first three-way valve is reversed, and the air compressor draws in and compresses the external air. The compressed air is ejected through the conduit, the glue outlet shell, two sets of regulating blocks, and the glue outlet plate, so that the glue liquid on the inner wall of the glue outlet shell, the surface of the regulating block, and the glue outlet hole of the glue outlet plate are discharged along with the compressed air. After the compressed air blows on the surface of the glue coating roller, the glue liquid on the surface of the glue coating roller is promoted to fall off, thereby improving the recovery efficiency of the glue liquid.

[0024] (3) The production system and method of the flexible paper-based sandpaper are characterized by arranging a dryer in the system. During the process of drying the paper-based sandpaper with glue in the dryer, an air pump evacuates the air in the dryer through a filter tank and a condenser. The condenser cools the passing gas to prevent desorption when the activated carbon net adsorbs organic matter. The activated carbon net in the filter tank adsorbs organic matter such as formaldehyde and phenol in the gas to reduce pollution caused by direct discharge of the dried organic matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of the present invention;

[0026] Figure 2 It is a partial cross-sectional enlarged view of the adhesive member of the present invention;

[0027] Figure 3 It is an enlarged cross-sectional view of the adhesive discharging part of the present invention;

[0028] Figure 4 is an enlarged view of the adjusting member of the present invention;

[0029] Figure 5 is an enlarged view of the limiting member of the present invention;

[0030] Figure 6 It is an enlarged view of the switching member of the present invention.

[0031] In the figure: 1. Base; 2. Glue-applying part; 21. Support frame; 22. Glue-applying roller; 23. Glue pump; 24. First three-way valve; 25. Air compressor; 26. Glue-discharging part; 261. Glue-discharging shell; 262. Glue-discharging plate; 263. Conduit; 27. Adjusting part; 271. Double-axis motor; 272. Screw; 273. Moving frame; 274. Adjusting block; 28. Limiting part; 281. Sliding frame; 282. Limiting rod; 283. Support roller; 284. Cylinder; 29. ​​Switching part; 291. Liquid extraction pipe; 292. Second three-way valve; 293. Liquid extraction block; 294. Branch pipe; 3. Electrostatic sand-planting machine; 4. Drying part; 41. Dryer; 42. Guide roller; 43. Condenser; 44. Filter tank; 45. Vacuum pump; 5. Recovery box; 6. Single-axis motor. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] refer to Figure 1-6 , the present invention provides the following three technical solutions:

[0034] First embodiment: A production system for flexible paper-based sandpaper includes a base 1, the base 1 being connected to production parts for producing flexible paper-based sandpaper, the production parts including: a recycling box 5 fixedly connected to the front side of the base 1 for receiving excess glue; a gluing part 2 installed on the front end of the upper side of the base 1 for gluing the paper base, the gluing part 2 including a support frame 21 fixedly connected to the front side of the base 1, a gluing roller 22 being rotatably connected to the upper side of the support frame 21, a glue pump 23 being fixedly connected to the top of the support frame 21, a glue outlet end of the glue pump 23 being fixedly connected to a first three-way valve 24, and a glue outlet part 26 connected to the lower end of the first three-way valve 24 being installed at the upper end of the support frame 21 near the gluing roller 22;

[0035] The glue discharging part 26 includes a glue discharging shell 261 fixedly connected to the support frame 21, and a glue discharging plate 262 that fits the surface of the glue coating roller 22 is fixedly connected to the bottom of the glue discharging shell 261, and a plurality of glue discharging holes are provided on the surface of the glue discharging plate 262. The middle end of the top of the glue discharging shell 261 is fixedly connected to a guide tube 263 fixedly connected to the first three-way valve 24. The rear side of the glue discharging shell 261 is equipped with an adjusting member 27 for adjusting the internal space of the glue discharging shell 261. The support frame 21 is connected to a limiting member 28 near the lower end of the glue coating roller 22, and a switching member 29 connected to the liquid extraction end of the glue pump 23 is installed on the right side of the recovery box 5; the electrostatic sand planting machine 3 is fixedly connected to the middle end of the upper side of the base 1 for paper base sand planting, and the front side of the electrostatic sand planting machine 3 is provided with a feeding port for the paper base to enter, and the rear side of the electrostatic sand planting machine 3 is provided with a discharging port for the paper base to be discharged; the drying part 4 is fixedly connected to the rear side of the base 1 for paper base drying; the single-axis motor 6 is fixedly connected to the left side of the support frame 21 for driving the glue coating roller 22;

[0036] The adjusting member 27 includes two sets of adjusting blocks 274 that are slidably connected to the inner side of the glue discharging housing 261. The bottoms of the two sets of adjusting blocks 274 are both in contact with the top of the glue discharging plate 262. The adjusting blocks 274 are fixedly connected to a movable frame 273 that is slidably connected to the glue discharging housing 261 away from the middle of the glue discharging housing 261. The rear side of the glue discharging housing 261 is fixedly connected to a dual-axis motor 271. The dual-axis motor 271 is a servo motor. The output ends on both sides of the dual-axis motor 271 are coaxially fixedly connected to two sets of threaded squares. The screw rods 272 are in opposite directions, and the two sets of screw rods 272 are respectively threadedly connected to the two sets of movable frames 273; the limiting member 28 includes a sliding frame 281 slidably connected to the support frame 21, and the rear side of the support frame 21 is fixedly connected to two sets of limiting rods 282 slidably connected to the rear end of the sliding frame 281. The front side of the sliding frame 281 is rotatably connected to the support roller 283 between the glue coating roller 22 and the recovery box 5. The base 1 is fixedly connected to a cylinder 284 with an extended end fixedly connected to the sliding frame 281;

[0037] The switching member 29 includes a liquid extraction pipe 291 fixedly connected to the liquid extraction end of the glue pump 23. A second three-way valve 292 for switching the glue extraction direction is fixedly connected to the bottom of the liquid extraction pipe 291. A liquid extraction block 293 fixedly connected to the right side of the recovery box 5 is fixedly connected to the left side of the second three-way valve 292. The liquid extraction block 293 is hollow and communicates with the interior of the recovery box 5. A branch pipe 294 for extracting external glue is fixedly connected to the right side of the second three-way valve 292. A liquid level sensor is fixedly connected to the rear side of the base 1 near the recovery box 5, so that the dual-axis motor 271, two sets of screws 272, the movable frame 273, and the adjustment block 274 cooperate with each other. The internal space of the glue discharging housing 261 is adjusted so that the glue discharging end of the glue discharging housing 261 matches the size of the paper substrate to be glued. The sliding frame 281, the limiting rod 282, the supporting roller 283, and the cylinder 284 cooperate to press the paper substrate against the glue coating roller 22. During the paper substrate conveying process, the glue pump 23, the first three-way valve 24, the glue discharging housing 261, the glue discharging plate 262, the guide tube 263, the glue coating roller 22, and the supporting roller 283 cooperate to glue the paper substrate of the required size. The liquid extraction pipe 291, the second three-way valve 292, the liquid extraction block 293, and the branch pipe 294 cooperate to switch the glue extraction position as required.

[0038] The second embodiment differs from the first embodiment mainly in that:

[0039] The output end of the single-axis motor 6 is coaxially fixedly connected to the glue roller 22. The glue-applying unit 2 includes an air compressor 25 fixedly connected to the support frame 21 and having its exhaust end fixedly connected to the left side of the first three-way valve 24. During the intervals between sandpaper production, the first three-way valve 24 is reversed to open the air compressor 25, which draws in and compresses external air. The compressed air is then ejected through the conduit 263, the glue outlet housing 261, two sets of regulating blocks 274, and the glue outlet plate 262, promoting the discharge of glue from the inner wall of the glue outlet housing 261, the surface of the regulating block 274, and the glue outlet hole of the glue outlet plate 262 along with the compressed air. The compressed air blows against the surface of the glue roller 22, promoting the shedding of glue from the surface of the glue roller 22.

[0040] The third embodiment differs from the second embodiment mainly in that:

[0041] The drying unit 4 includes a dryer 41 fixedly connected to the base 1, and a group of guide rollers 42 are rotatably connected to the front and rear sides of the dryer 41 respectively. A condenser 43 is fixedly connected to the right side of the top of the dryer 41. The exhaust end of the condenser 43 is fixedly connected to the middle end of the top of the dryer 41, and the exhaust end of the condenser 43 is fixedly connected to a filter tank 44 with a built-in activated carbon mesh. An exhaust pump 45 fixedly connected to the exhaust end and the filter tank 44 is fixedly connected to the left side of the top of the dryer 41; a feeding trough for introducing the paper base is provided on the front side of the dryer 41, and a discharge trough for discharging the paper base is provided on the rear side of the dryer 41; the filter tank 44 is fixedly connected to the condenser 43 and the exhaust pump 45 through flanges respectively; when the dryer 41 is drying the paper base with glue, the exhaust pump 45 exhausts air from the dryer 41 through the filter tank 44 and the condenser 43, the condenser 43 cools the passing gas, and the activated carbon mesh in the filter tank 44 adsorbs organic matter such as formaldehyde and phenol in the gas.

[0042] The present invention also discloses a production method of a production system based on a flexible paper-based sandpaper, which specifically comprises the following steps:

[0043] Step 1: The user moves the flexible paper base between the paper gluing roller 22 and the support roller 283, and starts the cylinder 284. The cylinder 284 drives the slide frame 281 and the support roller 283 to slide along the limit rod 282, and the support roller 283 pushes the paper base under the gluing roller 22, so that the paper base is introduced into the electrostatic sand planting machine 3 through the feed port. After the paper base is discharged from the discharge port at the rear side of the electrostatic sand planting machine 3, the paper base is introduced into the dryer 41 through the guide roller 42 and the feed trough, and finally the paper base is discharged from the dryer 41. The material is discharged from the discharge chute at the rear side of the dryer 41, and the dual-axis motor 271 is started. The dual-axis motor 271 drives two sets of screws 272 with opposite thread directions to rotate. The rotating two sets of screws 272 respectively drive the two sets of movable frames 273 and adjustment blocks 274 to move in opposite directions. The adjustment blocks 274 slide along the inside of the glue discharge housing 261 and the upper end of the glue discharge plate 262. When the two sets of adjustment blocks 274 are at an appropriate distance and match the corresponding size of the paper base, the dual-axis motor 271 is turned off;

[0044] Step 2. In step 1, after the position of the adjustment block 274 is adjusted, the paper base is transmitted through the external transmission part and the single-axis motor 6, the glue pump 23, the electrostatic sand planting machine 3, the dryer 41, the condenser 43, and the air pump 45 are turned on. The single-axis motor 6 drives the glue roller 22 to rotate, and the glue pump 23 extracts the glue from the external liquid supply end through the liquid extraction pipe 291, the second three-way valve 292, and the branch pipe 294. Then the glue is applied to the corresponding area on the surface of the glue roller 22 through the first three-way valve 24, the conduit 263, the glue shell 261, the two sets of adjustment blocks 274, and the glue plate 262. Then the glue roller 22 applies the glue to Excess glue falls into the recycling box 5 on the surface of the paper base. When the glue-coated paper base enters the electrostatic sand-planting machine 3, the electrostatic sand-planting machine 3 performs sand-planting on the glue-coated paper base. After the sand-planted paper base is introduced into the dryer 41 via the guide roller 42, the dryer 41 performs drying on the sand-planted paper base. An external liquid level sensor detects the liquid level in the recycling box 5. When the liquid level in the recycling box 5 reaches an appropriate height, the second three-way valve 292 is reversed. At this time, the glue pump 23 extracts the glue in the recycling box 5 through the liquid extraction pipe 291, the second three-way valve 292, and the liquid extraction block 293, thereby realizing the recycling of the glue.

[0045] Step three. In step two, the vacuum pump 45 evacuates the dryer 41 through the filter tank 44 and the condenser 43. When the gas passes through the condenser 43, the condenser 43 cools the gas. When the cooled gas passes through the filter tank 44, the activated carbon net in the filter tank 44 adsorbs organic matter such as formaldehyde and phenol in the gas. In the above process, the electrostatic sand planting machine 3, the dryer 41, and the condenser 43 are all existing technologies, so their internal specific structure and working principle are not described in detail.

[0046] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0047] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A production system for flexible paper-based sandpaper, comprising a base (1), characterized in that: The base (1) is connected to a production part for producing flexible paper-based sandpaper, and the production part comprises: A recycling box (5) is fixedly connected to the front side of the base (1) and is used to receive excess glue; The gluing member (2) is installed at the front end of the upper side of the base (1) and is used for gluing the paper base. The gluing member (2) includes a support frame (21) fixedly connected to the front side of the base (1). The upper side of the support frame (21) is rotatably connected to a gluing roller (22). The top of the support frame (21) is fixedly connected to a glue pump (23). The glue discharge end of the glue pump (23) is fixedly connected to a first three-way valve (24). The support frame (21) is provided with a glue discharge member (26) connected to the lower end of the first three-way valve (24) near the upper end of the glue discharge roller (22). The glue discharge member (26) includes a fixed connection to the support frame (21). The glue discharging shell (261) is connected to the glue discharging shell (261), the bottom of the glue discharging shell (261) is fixedly connected to a glue discharging plate (262) that is in contact with the surface of the glue coating roller (22), the top middle end of the glue discharging shell (261) is fixedly connected to a conduit (263) that is fixedly connected to the first three-way valve (24), the rear side of the glue discharging shell (261) is installed with an adjusting member (27) for adjusting the internal space of the glue discharging shell (261), the support frame (21) is connected to a limiting member (28) near the lower end of the glue coating roller (22), and the right side of the recovery box (5) is installed with a switching member (29) connected to the liquid extraction end of the glue pump (23); An electrostatic sand planting machine (3) is fixedly connected to the middle end of the upper side of the base (1) and is used for planting sand on the paper base; A drying element (4) is fixedly connected to the rear side of the base (1) and is used for drying the paper base; A single-axis motor (6) is fixedly connected to the left side of the support frame (21) and is used to drive the glue coating roller (22).

2. A production system for flexible paper-based sandpaper according to claim 1, characterized in that: The output end of the single-axis motor (6) is coaxially fixedly connected to the glue coating roller (22), and the glue coating component (2) includes an air compressor (25) fixedly connected to the support frame (21) and having an exhaust end fixedly connected to the left side of the first three-way valve (24).

3. The production system of a flexible paper-based sandpaper according to claim 2, characterized in that: The adjusting member (27) comprises two groups of adjusting blocks (274) slidably connected to the inner side of the glue discharging shell (261); the bottoms of the two groups of adjusting blocks (274) are both in contact with the top of the glue discharging plate (262); the adjusting blocks (274) are fixedly connected to a movable frame (273) slidably connected to the glue discharging shell (261) away from the middle of the glue discharging shell (261); a double-axis motor (271) is fixedly connected to the rear side of the glue discharging shell (261); two groups of screw rods (272) with opposite thread directions are coaxially fixedly connected to the output ends of both sides of the double-axis motor (271); the two groups of screw rods (272) are respectively threadedly connected to the two groups of movable frames (273).

4. A production system for flexible paper-based sandpaper according to claim 3, characterized in that: The limiting member (28) comprises a sliding frame (281) slidably connected to the support frame (21); two groups of limiting rods (282) slidably connected to the rear end of the sliding frame (281) are fixedly connected to the rear side of the support frame (21); a support roller (283) is rotatably connected between the front side of the sliding frame (281) near the glue coating roller (22) and the recovery box (5); and a cylinder (284) is fixedly connected to the base (1), the elongated end of which is fixedly connected to the sliding frame (281).

5. The production system of flexible paper-based sandpaper according to claim 4, characterized in that: The switching member (29) comprises a liquid extraction pipe (291) fixedly connected to the liquid extraction end of the glue pump (23); a second three-way valve (292) for switching the glue extraction direction is fixedly connected to the bottom of the liquid extraction pipe (291); a liquid extraction block (293) fixedly connected to the right side of the recovery box (5) is fixedly connected to the left side of the second three-way valve (292); a branch pipe (294) for extracting external glue is fixedly connected to the right side of the second three-way valve (292); and a liquid level sensor is fixedly connected to the rear side of the recovery box (5) near the base (1).

6. The production system of flexible paper-based sandpaper according to claim 5, characterized in that: The drying component (4) comprises a drying device (41) fixedly connected to the base (1); a group of guide rollers (42) are rotatably connected to the front and rear sides of the drying device (41); a condenser (43) is fixedly connected to the right side of the top of the drying device (41); an air suction end of the condenser (43) is fixedly connected to the middle end of the top of the drying device (41); an air discharge end of the condenser (43) is fixedly connected to a filter tank (44) with a built-in activated carbon net; and an air pump (45) is fixedly connected to the left side of the top of the drying device (41), the air suction end of the condenser (43) being fixedly connected to the filter tank (44).

7. A method for producing a flexible paper-based sandpaper according to any one of claims 1 to 6, comprising the following steps: Step 1: The user moves the flexible paper base between the paper coating roller (22) and the support roller (283), and the cylinder (284) drives the slide frame (281) and the support roller (283) to move vertically, and the paper base is pressed against the coating roller (22) by the support roller (283), and the paper base passes through the electrostatic sand planting machine (3). After the paper base is introduced into the dryer (41) through the guide roller (42), the dual-axis motor (271) cooperates with two sets of screws (272), the moving frame (273), and the adjusting block (274) to adjust the internal space of the glue output shell (261) so that the internal space of the glue output shell (261) matches the paper base of corresponding size; Step 2: In step 1, after the position of the regulating block (274) is adjusted, the paper base is transmitted through the external transmission member, and the glue pump (23) extracts the glue liquid from the external liquid supply end through the liquid extraction pipe (291), the second three-way valve (292), and the branch pipe (294). The glue liquid is applied to the corresponding area on the surface of the glue roller (22) through the first three-way valve (24), the guide tube (263), the glue outlet shell (261), the two groups of regulating blocks (274), and the glue outlet plate (262). The glue roller (22) applies the glue liquid to the surface of the paper base, and the excess glue liquid falls into the recovery box (5). When the glue-coated paper base enters the electrostatic sand-planting machine (3), the electrostatic sand-planting machine (3) performs sand-planting treatment on the glue-coated paper base. When the sand-planted paper base is introduced into the dryer (41) through the guide roller (42), the sand-planted paper base is dried in the dryer (41); Step 3. In step 2, the vacuum pump (45) performs vacuum treatment on the dryer (41) through the filter tank (44) and the condenser (43). When the gas passes through the condenser (43), the condenser (43) cools the gas, and when the cooled gas passes through the filter tank (44), the activated carbon net in the filter tank (44) adsorbs the organic matter in the gas.

8. The method for producing a flexible paper-based sandpaper according to claim 7, characterized in that: In the second step, an external liquid level sensor detects the liquid level of the recovery box (5). When the amount of glue liquid in the recovery box (5) is appropriate, the second three-way valve (292) is switched. At this time, the glue pump (23) extracts the glue liquid in the recovery box (5) through the liquid extraction pipe (291), the second three-way valve (292), and the liquid extraction block (293).

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