Uniform gluing device for sand paper processing

Abstract

The application discloses a uniform glue coating device for sandpaper processing and relates to the technical field of sandpaper processing. The uniform glue coating device for sandpaper processing comprises a rack, a first rotating roller is rotationally connected to the rack through mirror image distributed mounting plates, a feeding shell is fixedly connected to the rack, a detection shell is communicated to one side of the rack away from the feeding shell, a communicating pipe is arranged on one side of the detection shell away from the feeding shell, mirror image distributed first sliding plates are slidingly connected in the feeding shell, and a back roller and a feeding roller are rotationally connected between the mirror image distributed first sliding plates. The first sliding plates are driven to move the feeding roller, so that the immersion amount of the feeding roller in the glue in the feeding shell is adjusted according to the viscosity of the glue. The viscosity of the glue and the immersion amount of the feeding roller are inversely proportional, the uniformity of the glue attached to the feeding roller during constant-speed coating is ensured, and the uniformity of the coating layer on the surface of the raw paper is ensured.

Description

Technical Field

[0001] This invention relates to the field of sandpaper processing technology, and more particularly to a uniform adhesive coating device for sandpaper processing. Background Technology

[0002] Sandpaper coating is a process of applying an adhesive to the sandpaper substrate to prepare for subsequent abrasive application. This process is a core element determining the quality of the sandpaper. The purpose of coating the substrate is to form a uniform, thin, and stable coating, providing initial adhesion to firmly fix the abrasive particles to the substrate surface. In existing technologies, the coating process parameters need to be flexibly adjusted according to the characteristics of the abrasive. For example, for corundum abrasive, because its wettability with the adhesive is not as good as that for silicon carbide abrasive, a higher viscosity adhesive is required to form a stronger "interlocking bond." Similarly, the coarser the abrasive particles, the higher the viscosity of the adhesive required. Therefore, when coating the base paper, if the feeding rollers are immersed to the same depth of the adhesive, the more viscous adhesive will adhere to the feeding rollers in greater quantities. The thicker the adhesive on the feeding rollers, the worse the fluidity of the adhesive, making it difficult for the adhesive to evenly cover the surface of the feeding rollers. When coating the base paper with a large amount of adhesive, the distribution of the adhesive on the base paper may be uneven. On the other hand, if the adhesive is too thin, the thickness of the adhesive on the feeding rollers may be insufficient due to insufficient immersion depth. After being coated onto the base paper, the adhesive distribution will also be uneven, thus affecting the performance of the sandpaper. Summary of the Invention

[0003] This invention provides a uniform adhesive coating device for sandpaper processing, which aims to solve the problem of uneven coating on the surface of the base paper when different types of adhesives are coated with the same immersion depth of the feeding roller.

[0004] The technical solution of the present invention is as follows: a uniform adhesive coating device for sandpaper processing, comprising a frame, wherein a first rotating roller is rotatably connected to the frame via mirror-distributed mounting plates, a feeding shell is fixedly connected to the frame, a detection shell is connected to the side of the feeding shell away from the frame, a connecting pipe is provided on the side of the detection shell away from the feeding shell, a first sliding plate is slidably connected within the feeding shell, a back roller and a feeding roller are rotatably connected between the mirror-distributed first sliding plates, the back roller is located above the feeding roller, a first motor is fixedly connected to one side of the first sliding plate via a mounting frame, the output shaft of the first motor is fixedly connected to the back roller, the back roller and the feeding roller are driven by a pulley and a belt, a first fixing frame is fixedly connected to the side of the first sliding plate away from the feeding shell, a second rotating roller is rotatably connected between the mirror-distributed first fixing frames, and a detection limiting mechanism for adjusting the height of the feeding roller is provided in the detection shell.

[0005] As a further technical solution of the present invention, the transmission ratio between the back roller and the feeding roller is equal to the ratio of the diameters of the back roller and the feeding roller, so as to ensure that the back roller and the feeding roller have the same linear speed.

[0006] As a further technical solution of the present invention, the first fixed frame is slidably connected to a first sliding block, a spring is provided between the first sliding block and the adjacent first fixed frame, and a tension roller is rotatably connected between the mirror-distributed first sliding blocks, the tension roller being located between the back roller and the second rotating roller.

[0007] As a further technical solution of the present invention, the detection limiting mechanism includes a second motor, which is fixedly connected to the detection housing via a mounting bracket. The output shaft of the second motor is fixedly connected to a first rotating housing, which is rotatably connected to the detection housing. A second rotating housing is rotatably connected to the side of the detection housing away from the first rotating housing. The second rotating housing is located inside the detection housing. A first sliding rod is splined to the second rotating housing. Fan blades arranged in a ring array are fixedly connected to the second rotating housing. A first spline rod is splined to the first sliding rod. A torsion spring is provided between the end of the first spline rod near the second motor and the first rotating housing. A limiting rod is fixedly connected to the side of the first sliding rod near the second motor. An inclined sliding groove is provided inside the first rotating housing. The limiting rod and the inclined sliding groove inside the first rotating housing are in a limiting sliding engagement.

[0008] As a further technical solution of the present invention, a first fixing block is fixedly connected to the side of the first sliding rod near the second motor, and a second fixing block is fixedly connected inside the first rotating shell, with the first fixing block and the second fixing block engaging in a limiting cooperation.

[0009] As a further technical solution of the present invention, a first sliding frame is rotatably connected to the side of the first sliding rod away from the second motor. The first sliding frame is slidably connected to the detection shell. A limiting block is fixedly connected to the side of the first sliding frame away from the detection shell. A second sliding frame is slidably connected to the frame. The second sliding frame has equidistantly distributed through holes. The side of the second sliding frame near the first sliding frame is limited and engaged with the limiting block. A third sliding frame is slidably connected to the frame. A tension spring is provided between the third sliding frame and the frame. A second sliding block is provided on the third sliding frame. A first rotating rod is rotatably connected to the second sliding block. The first rotating rod is fixedly connected to the side of the back roller near the second sliding block. A fourth sliding frame is slidably connected to the frame through a mounting frame. The equidistantly distributed through holes on the second sliding frame and the third sliding frame are both limited and engaged with the fourth sliding frame.

[0010] As a further technical solution of the present invention, it also includes an adjustment mechanism for gradually reducing the height of the feeding roller. The adjustment mechanism is disposed on the second sliding block, and the second sliding block is slidably connected to the third sliding frame. The adjustment mechanism includes a second fixed frame, which is fixedly connected to the side of the second sliding block near the first sliding frame. A gearbox is fixedly connected to the second fixed frame, and the input shaft of the gearbox is fixedly connected to the first rotating rod. A threaded sleeve is rotatably connected to the second fixed frame. A third fixed frame is fixedly connected to the side of the third sliding frame near the first sliding frame. The threaded sleeve is threadedly connected to the third fixed frame. The threaded sleeve is provided with a second spline rod. A first friction wheel is fixedly connected to the end of the second spline rod away from the third fixed frame. An output shaft is provided on the side of the gearbox away from the frame. A second friction wheel is fixedly connected to the output shaft of the gearbox away from the frame. The first friction wheel and the second friction wheel are in contact and pressing fit.

[0011] As a further technical solution of the present invention, the sliding distance of the second sliding block in the third sliding frame is greater than the sliding distance of the mirror-distributed first sliding plate in the feeding shell, so as to ensure the coating range of the feeding roller.

[0012] As a further technical solution of the present invention, it also includes a switching structure for scraping off excess adhesive on the base paper. The switching structure is disposed on the first fixed frame arranged in a mirror image. The switching structure includes a fixed plate, which is fixedly connected to the side of the first fixed frame away from the first rotating roller via mirror-arranged mounting rods. A second sliding plate is slidably connected to the fixed plate via the mirror-arranged mounting rods. A threaded rod is threadedly connected to the fixed plate, and the threaded rod is rotatably connected to the second sliding plate. A second sliding rod is slidably connected to the frame, and the second sliding rod is provided with a rack. The fixed plate is fixedly connected to the first... The fourth fixed frame is rotatably connected to a second rotating rod. The second rotating rod has mirror-distributed gears with the same module, and the number of teeth of the gears closer to the fixed plate is less than the number of teeth of the gears farther from the fixed plate. The second sliding plate has a rack, which meshes with the gears on the second rotating rod closer to the fixed plate, and the rack on the second sliding rod meshes with the gears on the second rotating rod farther from the fixed plate. The second sliding rod is fixedly connected to a fifth fixed frame. The threaded sleeve is splinedly connected to the second splined rod. The fifth fixed frame is rotatably connected to the first friction wheel via a mounting rod.

[0013] As a further technical solution of the present invention, the second sliding plate is slidably connected to a mirror-distributed third sliding plate via a mounting rod. A scraper is fixedly connected to the side of the third sliding plate away from the second sliding plate. The second sliding plate is rotatably connected to a mirror-distributed bidirectional telescopic rod via a mounting rod. The two telescopic ends of the bidirectional telescopic rod are respectively hinged to the adjacent third sliding plate via mounting blocks. A permanent magnet is fixedly connected to the side of the third sliding plate near the second sliding plate. A mirror-distributed electromagnet is fixedly connected to the side of the second sliding plate near the third sliding plate. The electromagnet is magnetically attracted to the adjacent permanent magnet. An output shaft is provided on the side of the gearbox away from the first rotating roller. A bidirectional lead screw is fixedly connected to the output shaft of the gearbox away from the first rotating roller. A fourth sliding plate is slidably connected to the third sliding frame via a mounting rod. The fourth sliding plate is threadedly connected to the bidirectional lead screw. A sixth fixed frame is fixedly connected to the third sliding frame. A button is provided on the sixth fixed frame. The button on the sixth fixed frame contacts and presses against the fourth sliding plate. The button on the sixth fixed frame is electrically connected to the mirror-distributed electromagnets.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a mirror-distributed first sliding plate to drive the feeding roller to move, so that the immersion amount of the feeding roller in the adhesive in the feeding shell is adjusted according to the viscosity of the adhesive. The viscosity of the adhesive is inversely proportional to the immersion amount of the feeding roller, ensuring the uniformity of the adhesive adhering to the feeding roller during constant-speed coating, thereby ensuring the uniformity of the coating layer on the surface of the base paper; the circular array of fan blades rotates in the adhesive, and the viscosity of the adhesive is judged based on the reaction force received by the fan blades, thus providing a criterion for judging the immersion distance of the feeding roller; the threaded sleeve cooperates with the third fixing frame, The downward movement speed of the feeding roller is made equal to the downward movement speed of the adhesive liquid level in the feeding shell, thus ensuring that the immersion depth of the feeding roller in the adhesive liquid in the feeding shell is always equal, thereby ensuring the uniformity of the coating of the base paper by the feeding roller; through the cooperation of the bidirectional screw and the fourth sliding plate, the wear degree of the doctor blade is judged according to the coating distance of the base paper, and the doctor blade is replaced when it is severely worn, thereby preventing the uniformity of the base paper coating layer from fluctuating due to excessive wear of the doctor blade, and improving the quality of base paper production; through the cooperation of the fifth fixed frame and the first friction wheel, the descent speed of the feeding roller is made proportional to the amount of returned material, further ensuring the stability of the immersion depth of the feeding roller. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the internal mechanism of the detection shell of the present invention; Figure 3 This is a three-dimensional structural diagram illustrating the relationship between the back roller and the first motor in this invention. Figure 4This is a three-dimensional structural cross-sectional view of the detection and limiting mechanism of the present invention; Figure 5 This is a three-dimensional structural cross-sectional view of the cooperation relationship between the second rotating shell and the first sliding rod of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle; Figure 7 This is a three-dimensional structural diagram illustrating the cooperation relationship between the limiting block and the second sliding frame of the present invention; Figure 8 This is a three-dimensional structural cross-sectional view of the cooperation relationship between the third sliding frame and the fourth sliding frame of the present invention; Figure 9 This is a three-dimensional structural schematic diagram of the adjustment mechanism of the present invention; Figure 10 This is a three-dimensional structural diagram of the switching structure of the present invention; Figure 11 This is a three-dimensional structural diagram illustrating the cooperation relationship between the bidirectional lead screw and the fourth sliding plate of the present invention. Figure 12 This is an exploded view showing the relationship between the permanent magnet and the electromagnet in this invention.

[0016] The markings in the diagram are as follows: 1-Frame, 2-First rotating roller, 3-Feeding shell, 4-Detection shell, 5-First sliding plate, 6-Back roller, 7-Feeding roller, 8-First motor, 9-First fixed frame, 10-Second rotating roller, 11-First sliding block, 12-Tensioning roller, 13-Detection and limiting mechanism, 1301-Second motor, 1302-First rotating shell, 1303-Second rotating shell, 1304-First sliding rod, 1305-Fan blade, 1306-First spline rod, 1307-Limiting rod, 1308-First fixed block, 1309-Second fixed block, 1310-First sliding frame, 1311-Limiting block, 1312-Second sliding frame, 1313-Third sliding frame, 1314-Second sliding block, 1315-First rotating roller 1316 - Fourth sliding frame, 14 - Adjustment mechanism, 1401 - Second fixed frame, 1402 - Gearbox, 1403 - Threaded sleeve, 1404 - Third fixed frame, 1405 - Second splined rod, 1406 - First friction wheel, 1407 - Second friction wheel, 15 - Switching structure, 1501 - Fixed plate, 1502 - Second sliding plate, 1503 - Threaded rod, 1504 - Second sliding rod, 1505 - Fourth fixed frame, 1506 - Second rotating rod, 1507 - Fifth fixed frame, 1508 - Third sliding plate, 1509 - Scraper, 1510 - Bidirectional telescopic rod, 1511 - Permanent magnet, 1512 - Electromagnet, 1513 - Bidirectional lead screw, 1514 - Fourth sliding plate, 1515 - Sixth fixed frame. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention.

[0018] Example 1: A uniform adhesive coating device for sandpaper processing, such as Figures 1-3 As shown, the machine includes a frame 1. A first rotating roller 2 is rotatably connected to the upper side of the frame 1 via mirror-distributed mounting plates. The first rotating roller 2 supports and transfers the base paper. A feed housing 3 for storing adhesive is fixed to the frame 1. A detection housing 4 is connected to the lower side of the feed housing 3. A connecting pipe is provided on the lower side of the detection housing 4 for injecting adhesive into the detection housing 4 and the feed housing 3. First sliding plates 5, mirror-distributed front and rear, are slidably connected to the inner side of the feed housing 3. A back roller 6 for supporting the base paper and a feeding roller 7 for coating the base paper are rotatably connected between the two first sliding plates 5. The back roller 6 is located above the feeding roller 7, and its diameter is larger than that of the feeding roller 7. This helps reduce the unevenness of the coating liquid on the substrate surface. Through a larger contact area, the coating liquid can be more evenly distributed on the substrate, avoiding uneven coating problems. The first sliding plate 5 on the rear side is fixedly connected to the first motor 8 via a mounting bracket. The output shaft of the first motor 8 is fixedly connected to the back roller 6. The back roller 6 is driven by the feed roller 7 via a pulley and belt. The transmission ratio between the back roller 6 and the feed roller 7 is equal to the ratio of the diameters of the back roller 6 and the feed roller 7, in order to ensure that the back roller 6 and the feed roller 7 have the same linear speed. The upper side of the first sliding plate 5 is fixedly connected to the first fixed frame 9. The mirror-distributed first fixed frames 9 are rotatably connected to the second rotating roller 10 for conveying the raw paper. The detection shell 4 is provided with a detection limit mechanism 13 for adjusting the height of the feed roller 7. The first sliding block 11 is slidably connected inside the first fixed frame 9, and a spring is provided between the two. The mirror-distributed first sliding blocks 11 are rotatably connected to the tension roller 12 for providing tension to the raw paper. The tension roller 12 is located between the back roller 6 and the second rotating roller 10.

[0019] like Figures 1-6As shown, the detection limiting mechanism 13 includes a second motor 1301, which is fixed to the rear side of the detection housing 4 via a mounting bracket. The output shaft of the second motor 1301 is fixed to a first rotating housing 1302, which is rotatably connected to the detection housing 4. A second rotating housing 1303 is rotatably connected to the front side inside the detection housing 4. The second rotating housing 1303 is located inside the detection housing 4. A first sliding rod 1304 is splined to the second rotating housing 1303. A ring-shaped array of fan blades 1305 is fixed to the outer side of the second rotating housing 1303. The ring-shaped array of fan blades 1305 is located inside the detection housing 4 and is used to detect the viscosity of the adhesive. A first spline rod 1306 is splined to the first sliding rod 1304. A torsion spring is provided between the rear side of the first spline rod 1306 and the first rotating housing 1302. A limiting rod 1307 is fixed to the rear side of the first sliding rod 1304. An inclined plate is provided inside the first rotating housing 1302. The inclined sliding groove and the limiting rod 1307 are in a limiting sliding fit with the inclined sliding groove in the first rotating shell 1302. When the first sliding rod 1304 and the first rotating shell 1302 rotate relative to each other, the first sliding rod 1304 drives the limiting rod 1307 to slide in the inclined sliding groove of the first rotating shell 1302. The limiting rod 1307 is squeezed and limited to move forward by the inclined sliding groove of the first rotating shell 1302. The rear side of the first sliding rod 1304 is fixedly connected to the first fixing block 1308, and the inner side of the first rotating shell 1302 is fixedly connected to the second fixing block 1309. The first fixing block 1308 and the second fixing block 1309 are in a limiting fit. The torsion spring between the first spline rod 1306 and the first rotating shell 1302 is initially in a stored state. The stored force is equal to the sum of the resistance encountered when the fan blades 1305 in the ring array drive the water to rotate. This is used to ensure the initial rotation state of the first spline rod 1306 and the first rotating shell 1302.

[0020] like Figure 3 , Figure 5 , Figure 7 and Figure 8As shown, the front side of the first sliding rod 1304 is rotatably connected to a first sliding frame 1310 that is slidably connected to the detection housing 4. A limiting block 1311 is fixedly connected to the front side of the first sliding frame 1310. The limiting block 1311 is a rectangular block with an inclined surface on its upper side. The frame 1 is slidably connected to a second sliding frame 1312 with equally spaced through holes. The lower side of the second sliding frame 1312 has an inclined surface, which engages with the limiting block 1311. When the limiting block 1311 moves forward, it presses and drives the second sliding frame 1312 to move upward. The frame 1 is slidably connected to a third sliding frame 1313, with a space between them. There is a tension spring, and the initial state of the tension spring is a stored state. The third sliding frame 1313 is provided with a second sliding block 1314. The second sliding block 1314 is rotatably connected to a first rotating rod 1315 fixed to the front side of the back roller 6. The frame 1 is slidably connected to a fourth sliding frame 1316 through the mounting frame. The fourth sliding frame 1316 is provided with a handle on the front side for easy movement. The fourth sliding frame 1316 is provided with a limiting block on the right side and a limiting frame on the left side. The through holes evenly distributed on the second sliding frame 1312 are limited and engaged with the limiting block on the right side of the fourth sliding frame 1316. The limiting frame on the left side of the fourth sliding frame 1316 is limited and engaged with the third sliding frame 1313.

[0021] When the user applies the coating to the sandpaper base (hereinafter referred to as the base paper) using this device, the user first injects the adhesive into the detection shell 4 through the connecting tube on the lower side of the detection shell 4 until sufficient adhesive is injected into the detection shell 4 (completely submerging the fan blades 1305 distributed in the annular array). After that, the user stops injecting the adhesive into the detection shell 4 and starts the second motor 1301. The output shaft of the second motor 1301 drives the first rotating shell 1302 to rotate. The first rotating shell 1302 drives the first spline rod 1306 to rotate through a torsion spring. The first spline rod 1306 drives the first sliding rod 1304 to rotate. The first sliding rod 1304 drives the second rotating shell 1303 to rotate. The second rotating shell 1303 drives the annular array... The distributed fan blades 1305 rotate. When the fan blades 1305 in the ring array rotate, the higher the viscosity of the rubber, the greater the reaction force on the fan blades 1305. The fan blades 1305 drive the first sliding rod 1304 and the first spline rod 1306 to rotate in opposite directions through the second rotating shell 1303, so that the first sliding rod 1304 and the first rotating shell 1302 rotate relative to each other. The higher the viscosity of the rubber, the greater the distance of relative rotation between the first sliding rod 1304 and the first rotating shell 1302. The fan blades 1305 rotate in the rubber through the ring array, and the viscosity of the rubber is judged based on the reaction force on the fan blades 1305, thus providing a judgment standard for the immersion distance of the feeding roller 7.

[0022] When the first sliding rod 1304 rotates relative to the first rotating shell 1302, the first sliding rod 1304 drives the limiting rod 1307 to rotate. The limiting rod 1307 slides in the inclined groove of the first rotating shell 1302. During the rotation of the limiting rod 1307, the limiting rod 1307 is squeezed and limited to move forward by the inclined groove of the first rotating shell 1302. The limiting rod 1307 drives the first sliding rod 1304 to move forward. That is, the higher the viscosity of the adhesive, the greater the forward distance of the first sliding rod 1304.

[0023] When the first sliding rod 1304 moves forward, it drives the first sliding frame 1310 to move forward. The first sliding frame 1310 drives the limiting block 1311 to move forward. During the forward movement of the limiting block 1311, the upper inclined surface of the limiting block 1311 contacts and presses against the lower inclined surface of the second sliding frame 1312, causing the second sliding frame 1312 to move upward. That is, the higher the viscosity of the adhesive, the greater the upward movement distance of the second sliding frame 1312, until the second sliding frame 1312 stops moving upward. The user controls the fourth sliding frame 1316 to move backward. The fourth sliding frame 1316 moves backward and its right limiting block engages with the adjacent through hole on the second sliding frame 1312. When the right limiting block of the fourth sliding frame 1316 passes through the adjacent through hole on the second sliding frame 1312, the left limiting frame of the fourth sliding frame 1316 loses its limiting effect on the third sliding frame 1313. The tension spring between the third sliding frame 1313 and the frame 1 causes the third sliding frame 1313 to move upward. The third sliding frame 1313 then... The second sliding block 1314 moves upward, driving the first rotating rod 1315 to move upward. The first rotating rod 1315 drives the back roller 6 to move upward, and the back roller 6 drives the feeding roller 7 to move upward through the two first sliding plates 5, until the upper end of the third sliding frame 1313 contacts the second sliding frame 1312 and stops moving upward. The feeding roller 7 then stops moving upward. Subsequently, the user injects the adhesive into the detection shell 4 and the feeding shell 3 again through the connecting pipe on the lower side of the detection shell 4, until the feeding shell 3 is full. When the adhesive is applied, the distance that the feeding roller 7 is immersed in the adhesive is the distance at which the adhesive forms a coating of suitable thickness. The user stops the second motor 1301, and the preparation work is completed. The feeding roller 7 is moved by the mirror-distributed first sliding plate 5, so that the amount of adhesive immersing the feeding roller 7 in the adhesive in the feeding shell 3 is adjusted according to the viscosity of the adhesive. The viscosity of the adhesive is inversely proportional to the amount of adhesive immersing the feeding roller 7, so as to ensure the uniformity of the adhesive adhering on the feeding roller 7 when coating at a constant speed, thereby ensuring the uniformity of the coating layer on the surface of the base paper.

[0024] After preparation, the user winds the base paper around the upper side of the first rotating roller 2, then passes the base paper between the back roller 6 and the feed roller 7 and winds it sequentially around the upper side of the second rotating roller 10 and the tension roller 12 (e.g., Figure 1As shown), after the base paper is wound, the user starts the first motor 8. The output shaft of the first motor 8 drives the back roller 6 to rotate. The back roller 6 drives the feeding roller 7 to rotate through the pulley and belt. The rotation of the feeding roller 7 drives the adhesive in the feeding shell 3 and coats it to the lower side of the base paper. The coated base paper gradually moves upward with the transmission of the back roller 6 and proceeds to the next step until all the base paper is coated. The user stops the first motor 8 and resets the second sliding frame 1312, the third sliding frame 1313 and the fourth sliding frame 1316. At this time, the operation of this device is completed.

[0025] Example 2: Based on the example, such as Figure 1 , Figure 2 and Figure 9 As shown, it also includes an adjustment mechanism 14 for gradually lowering the height of the feeding roller 7. The adjustment mechanism 14 is disposed on the second sliding block 1314, which is slidably connected to the third sliding frame 1313. The adjustment mechanism 14 includes a second fixed frame 1401, which is fixedly connected to the lower side of the second sliding block 1314. A gearbox 1402 is fixedly connected to the upper side of the second fixed frame 1401. The input shaft of the gearbox 1402 is fixedly connected to the front end of the first rotating rod 1315. A threaded sleeve 1403 is rotatably connected to the lower side of the second fixed frame 1401. A third fixed frame 1403 is threadedly connected to the threaded sleeve 1403 and fixedly connected to the lower side of the third sliding frame 1313. 404. The length of the threaded sleeve 1403 is greater than the sliding distance of the second sliding block 1314 in the third sliding frame 1313. The threaded sleeve 1403 is provided with a second spline rod 1405. The upper end of the second spline rod 1405 is fixedly connected to a first friction wheel 1406. Output shafts are provided on the upper and left sides of the gearbox 1402. The output shaft on the upper side of the gearbox 1402 is fixedly connected to a second friction wheel 1407. The first friction wheel 1406 and the second friction wheel 1407 are in contact and pressed together. The sliding distance of the second sliding block 1314 in the third sliding frame 1313 is greater than the sliding distance of the mirror-distributed first sliding plate 5 in the feeding shell 3, which is used to ensure the coating range of the feeding roller 7.

[0026] During the coating process on the base paper, as coating continues, the amount of adhesive in the feed housing 3 gradually decreases. To ensure the immersion distance of the feeding roller 7 in the adhesive, the following operations are required: When the back roller 6 rotates, it drives the first rotating rod 1315 to rotate. The first rotating rod 1315 drives the input shaft of the gearbox 1402 to rotate. The upper output shaft of the gearbox 1402 drives the second friction wheel 1407 to rotate. The second friction wheel 1407 drives the first friction wheel 1406 to rotate by friction. The first friction wheel 1406 drives the threaded sleeve 1403 to rotate through the second spline rod 1405. The threaded sleeve 1403 and the third fixed frame 1404 move the threaded sleeve 1403 downward through the thread. 1403 drives the second sliding block 1314 to move downward through the second fixed frame 1401. The second sliding block 1314 drives the back roller 6 to move downward through the first rotating rod 1315. The back roller 6 drives the feeding roller 7 to move downward through the two first sliding plates 5. The threaded sleeve 1403 cooperates with the third fixed frame 1404 to make the downward movement speed of the feeding roller 7 equal to the downward movement speed of the adhesive liquid level in the feeding shell 3. This ensures that the immersion depth of the feeding roller 7 in the adhesive liquid in the feeding shell 3 is always equal, thereby ensuring the uniformity of the coating of the base paper by the feeding roller 7.

[0027] As the back roller 6 and the feeding roller 7 move downwards, the back roller 6 drives the tension roller 12 and the two first sliding blocks 11 to move to the right through the raw paper, while squeezing the spring between the first sliding block 11 and the adjacent first fixed frame 9, thereby maintaining the force of the raw paper and ensuring the coating quality of the raw paper.

[0028] Continue the above workflow until all the base paper is coated. The user controls the second motor 1301 to reverse until the second sliding block 1314 is reset. Then the user stops the second motor 1301, stops the first motor 8, and resets the second sliding frame 1312, the third sliding frame 1313, and the fourth sliding frame 1316. At this point, the device is working.

[0029] Example 3: Based on Example 2, such as Figure 2 and Figures 9-11As shown, it also includes a switching structure 15 for scraping off excess adhesive from the base paper. The switching structure 15 is disposed on a mirror-distributed first fixed frame 9. The switching structure 15 includes a fixed plate 1501, which is fixed to the left side of the mirror-distributed first fixed frame 9 via mirror-distributed mounting rods. A second sliding plate 1502 is slidably connected to the fixed plate 1501 via the mirror-distributed mounting rods. A threaded rod 1503, which is rotatably connected to the second sliding plate 1502, is threadedly connected to the fixed plate 1501. A second sliding rod 1504 with a rack is slidably connected to the frame 1. A fourth fixed frame 1505 is fixed to the fixed plate 1501 via the mounting frame. The fourth fixed frame 1505 is located to the left of the second sliding rod 1504 and is rotatably connected to a second rotating rod. The second rotating rod 1506 is equipped with gears that are mirror-distributed front and rear and have the same module, with the rear gear having fewer teeth than the front gear to amplify the moving distance. The front left side of the second sliding plate 1502 is equipped with a rack, which meshes with the rear gear on the second rotating rod 1506. The rack on the second sliding rod 1504 meshes with the front gear on the second rotating rod 1506. The right side of the second sliding rod 1504 is fixedly connected to a fifth fixed bracket 1507 that is rotatably connected to the first friction wheel 1406 via a mounting rod. The threaded sleeve 1403 is splinedly connected to the second spline rod 1405. When the first friction wheel 1406 moves downward, the transmission ratio between the first friction wheel 1406 and the second friction wheel 1407 gradually increases.

[0030] like Figure 11 and Figure 12As shown, a mirror-distributed third sliding plate 1508 is slidably connected to the right side of the second sliding plate 1502 via a mounting rod. A scraper 1509 for scraping off excess adhesive from the original paper is fixed to the right side of the third sliding plate 1508. A bidirectional telescopic rod 1510 with a mirror-distributed front-to-back distribution is rotatably connected to the second sliding plate 1502 via a mounting rod. The two telescopic ends of the bidirectional telescopic rod 1510 are respectively hinged to the adjacent third sliding plate 1508 via mounting blocks. A permanent magnet 1511 is fixed to the left side of the third sliding plate 1508, with the magnetic poles of the two permanent magnets 1511 facing the same direction. A mirror-distributed electromagnet 1512 is fixed to the right side of the second sliding plate 1502, with the magnetic poles of the two electromagnets 1512 always opposite. The electromagnet 1512 magnetically attracts the adjacent permanent magnet 1511. Gearbox 1 An output shaft is provided on the left side of gearbox 1402. A bidirectional lead screw 1513 is fixedly connected to the output shaft on the left side of gearbox 1402. A fourth sliding plate 1514 is slidably connected to the left side of third sliding frame 1313 via a mounting rod. The fourth sliding plate 1514 is threadedly connected to the bidirectional lead screw 1513. A sixth fixed frame 1515 with a button is fixedly connected to the left side of third sliding frame 1313. The button on the sixth fixed frame 1515 contacts and presses against the fourth sliding plate 1514. When the bidirectional lead screw 1513 rotates, it drives the fourth sliding plate 1514 to move to the left through the thread until the fourth sliding plate 1514 contacts and presses against the button on the sixth fixed frame 1515. The button on the sixth fixed frame 1515 is electrically connected to the mirror-distributed electromagnets 1512.

[0031] After the base paper is coated, a scraper 1509 is needed to smooth the adhesive on the surface of the base paper to ensure the smoothness of the adhesive on the base paper. However, as the scraper 1509 is used, its surface will gradually wear down, thus affecting the smoothness of the adhesive on the base paper. To solve the above problem, the following operation is required: Before the base paper is coated, the user first determines the required thickness of the base paper coating layer. Then, the user uses a tool to rotate the threaded rod 1503. The rotation of the threaded rod 1503 drives the second sliding plate 1502 to move through the thread. The second sliding plate 1502 drives the two third sliding plates 1508 to move. The third sliding plate 1508 drives the adjacent scraper 1509 above it to move until the distance between the lower scraper 1509 and the base paper is equal to the thickness of the base paper coating layer. Then, the user stops rotating the threaded rod 1503. At this time, the scraper 1509 is adjusted.

[0032] After the doctor blade 1509 is adjusted, the user begins the coating process. As the coating process progresses, the doctor blade 1509 continuously scrapes off excess adhesive from the base paper coating layer. The scraped adhesive falls back down into the feed housing 3. The back roller 6 drives the input shaft of the gearbox 1402 to rotate via the first rotating rod 1315. The output shaft on the left side of the gearbox 1402 drives the bidirectional lead screw 1513 to rotate. The bidirectional lead screw 1513 drives the fourth sliding plate 1514 to move to the left via a thread until the fourth sliding plate 1514... Move to the left to the end of the bidirectional lead screw 1513. At this point, the scraper 1509 is excessively worn and needs to be replaced. The fourth sliding plate 1514 contacts and presses against the button on the fixed plate 1501. The button on the fixed plate 1501 controls the two electromagnets 1512 on the second sliding plate 1502 to change their magnetic poles via a signal. At this time, the repulsive force between the lower electromagnet 1512 and the lower permanent magnet 1511 changes to a magnetic attraction force, while the magnetic attraction force between the upper electromagnet 1512 and the upper permanent magnet 1511 changes to a repulsive force. The repulsive force between magnet 1512 and the upper permanent magnet 1511 causes the upper third sliding plate 1508 to move to the right. The upper third sliding plate 1508 then causes the upper scraper 1509 to move to the right until the upper scraper 1509 scrapes off excess coating material from the original paper coating layer. The third sliding plate 1508 then causes the lower third sliding plate 1508 to move to the left via the bidirectional telescopic rod 1510 until the lower electromagnet 1512 attracts the upper permanent magnet 1511 and fixes the upper scraper 1509. Subsequently... The user replaces the worn doctor blade 1509 on the lower side with a new doctor blade 1509. The user then repeats the above steps to scrape off the excess coating layer on the base paper until all the base paper is coated. The wear degree of the doctor blade 1509 is judged based on the coating distance of the base paper by the cooperation of the bidirectional lead screw 1513 and the fourth sliding plate 1514. When the doctor blade 1509 is severely worn, it is replaced, thereby preventing the uniformity of the base paper coating layer from fluctuating due to excessive wear of the doctor blade 1509 and improving the quality of base paper production.

[0033] When scraping off excess coating on the base paper, if a thicker coating is required, it indicates that less adhesive is scraped off by the scraper 1509 and falls back into the feed housing 3; conversely, if a thinner coating is required, it indicates that more adhesive is scraped off by the scraper 1509 and falls back into the feed housing 3. As material is continuously returned, the portion of the feed roller 7 immersed in the feed housing 3 gradually increases, thus affecting the uniformity of the initial coating of the base paper by the feed roller 7. To solve this problem, the following operation is required: When the user adjusts the distance between the scraper 1509 and the base paper using the above operation, the rack on the second sliding plate 1502 meshes with the rear gear on the second rotating rod 1506, causing the second rotating rod 1506 to rotate. The second rotating rod 1506 then drives the front gear to rotate. The front gear meshes with the rack on the second sliding rod 1504, causing the second sliding rod 1504 to move. The second sliding rod 1504 then moves the fifth fixed frame 1507, which in turn moves the first friction wheel 1406. This changes the transmission ratio between the first friction wheel 1406 and the second friction wheel 1407. The greater the distance between the scraper 1509 and the base paper (the smaller the amount of recycled material), the smaller the transmission ratio between the second friction wheel 1407 and the first friction wheel 1406 (the faster the feeding roller 7 moves downward). This eliminates the influence of recycled material on the amount of adhesive applied to the feeding roller 7. Through the cooperation between the fifth fixed frame 1507 and the first friction wheel 1406, the downward speed of the feeding roller 7 is made proportional to the amount of recycled material, further ensuring the stability of the immersion depth of the feeding roller 7.

[0034] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A uniform adhesive coating device for sandpaper processing, characterized in that: The system includes a frame (1), which is rotatably connected to a first rotating roller (2) via mirror-distributed mounting plates. A feeding shell (3) is fixedly connected to the frame (1). A detection shell (4) is connected to the side of the feeding shell (3) away from the frame (1). A connecting pipe is provided on the side of the detection shell (4) away from the feeding shell (3). Mirror-distributed first sliding plates (5) are slidably connected inside the feeding shell (3). A back roller (6) and a feeding roller (7) are rotatably connected between the mirror-distributed first sliding plates (5). The back roller (6) is located at the feeding roller (7). 7) Above, the first sliding plate (5) on one side is fixedly connected to the first motor (8) by the mounting bracket. The output shaft of the first motor (8) is fixedly connected to the back roller (6). The back roller (6) and the feeding roller (7) are driven by pulleys and belts. The first sliding plate (5) is fixedly connected to the side away from the feeding shell (3) by the first fixed frame (9). The first fixed frames (9) distributed in a mirror image are rotatably connected to the second rotating roller (10). The detection shell (4) is provided with a detection limiting mechanism (13) for adjusting the height of the feeding roller (7).

2. The uniform adhesive coating device for sandpaper processing according to claim 1, characterized in that: The transmission ratio between the back roller (6) and the feed roller (7) is equal to the ratio of the diameter of the back roller (6) to the diameter of the feed roller (7), so as to ensure that the back roller (6) and the feed roller (7) have the same linear speed.

3. The uniform adhesive coating device for sandpaper processing according to claim 1, characterized in that: The first fixed frame (9) is slidably connected to a first sliding block (11), and a spring is provided between the first sliding block (11) and the adjacent first fixed frame (9). A tension roller (12) is rotatably connected between the mirror-distributed first sliding blocks (11), and the tension roller (12) is located between the back roller (6) and the second rotating roller (10).

4. The uniform adhesive coating device for sandpaper processing according to claim 1, characterized in that: The detection limiting mechanism (13) includes a second motor (1301), which is fixed to the detection housing (4) via a mounting bracket. The output shaft of the second motor (1301) is fixed to a first rotating housing (1302), which is rotatably connected to the detection housing (4). A second rotating housing (1303) is rotatably connected to the side of the detection housing (4) away from the first rotating housing (1302). The second rotating housing (1303) is located inside the detection housing (4), and a first sliding rod (1304) is splinedly connected to the second rotating housing (1303). The second rotating housing (1303) is fixedly connected to a fan blade (1305) arranged in a ring array. The first sliding rod (1304) is splinedly connected to a first spline rod (1306). A torsion spring is provided between the end of the first spline rod (1306) near the second motor (1301) and the first rotating housing (1302). A limiting rod (1307) is fixedly connected to the side of the first sliding rod (1304) near the second motor (1301). An inclined sliding groove is provided inside the first rotating housing (1302). The limiting rod (1307) is in a limiting sliding engagement with the inclined sliding groove inside the first rotating housing (1302).

5. The uniform adhesive coating device for sandpaper processing according to claim 4, characterized in that: A first fixing block (1308) is fixedly connected to the side of the first sliding rod (1304) near the second motor (1301), and a second fixing block (1309) is fixedly connected inside the first rotating shell (1302). The first fixing block (1308) and the second fixing block (1309) are in a limiting cooperation.

6. The uniform adhesive coating device for sandpaper processing according to claim 5, characterized in that: The first sliding rod (1304) is rotatably connected to a first sliding frame (1310) on the side away from the second motor (1301). The first sliding frame (1310) is slidably connected to the detection shell (4). A limit block (1311) is fixedly connected to the side of the first sliding frame (1310) away from the detection shell (4). A second sliding frame (1312) is slidably connected to the frame (1). The second sliding frame (1312) has equidistantly distributed through holes. The side of the second sliding frame (1312) closest to the first sliding frame (1310) is limited and engaged with the limit block (1311). A third sliding frame (1) is slidably connected to the frame (1). A sliding frame (1313) is provided with a tension spring between the third sliding frame (1313) and the frame (1). The third sliding frame (1313) is provided with a second sliding block (1314). The second sliding block (1314) is rotatably connected to a first rotating rod (1315). The first rotating rod (1315) is fixedly connected to the back roller (6) on the side near the second sliding block (1314). The frame (1) is slidably connected to a fourth sliding frame (1316) through a mounting frame. The through holes evenly distributed on the second sliding frame (1312) and the third sliding frame (1313) are both limited to the fourth sliding frame (1316).

7. The uniform adhesive coating device for sandpaper processing according to claim 6, characterized in that: It also includes an adjustment mechanism (14) for gradually lowering the height of the feeding roller (7). The adjustment mechanism (14) is disposed on the second sliding block (1314), which is slidably connected to the third sliding frame (1313). The adjustment mechanism (14) includes a second fixed frame (1401), which is fixedly connected to the side of the second sliding block (1314) near the first sliding frame (1310). A gearbox (1402) is fixedly connected to the second fixed frame (1401), and the input shaft of the gearbox (1402) is fixedly connected to the first rotating rod (1315). A threaded sleeve (1403) is rotatably connected to the second fixed frame (1401). The third sliding frame (1313) is fixedly connected to a third fixed frame (1404) on the side near the first sliding frame (1310). The threaded sleeve (1403) is threadedly connected to the third fixed frame (1404). The threaded sleeve (1403) is provided with a second spline rod (1405). The end of the second spline rod (1405) away from the third fixed frame (1404) is fixedly connected to a first friction wheel (1406). The gearbox (1402) is provided with an output shaft on the side away from the frame (1). The output shaft of the gearbox (1402) away from the frame (1) is fixedly connected to a second friction wheel (1407). The first friction wheel (1406) and the second friction wheel (1407) are in contact and pressing fit.

8. The uniform adhesive coating device for sandpaper processing according to claim 7, characterized in that: The sliding distance of the second sliding block (1314) in the third sliding frame (1313) is greater than the sliding distance of the mirror-distributed first sliding plate (5) in the feeding shell (3), which is used to ensure the coating range of the feeding roller (7).

9. A uniform adhesive coating device for sandpaper processing according to claim 7, characterized in that: It also includes a switching structure (15) for scraping off excess adhesive from the base paper. The switching structure (15) is disposed on the first fixed frame (9) which is mirror-distributed. The switching structure (15) includes a fixed plate (1501). The fixed plate (1501) is fixed to the side of the first fixed frame (9) away from the first rotating roller (2) by a mirror-distributed mounting rod. The fixed plate (1501) is slidably connected to a second sliding plate (1502) by a mirror-distributed mounting rod. The fixed plate (1501) is threadedly connected to a threaded rod (1503). The threaded rod (1503) is rotatably connected to the second sliding plate (1502). The frame (1) is slidably connected to a second sliding rod (1504). The second sliding rod (1504) is provided with a rack. The fixed plate (1501) is fixed to a fourth fixed frame (1505) by a mounting frame. The fourth fixed frame (1505) is slidably connected to the fourth fixed frame (1505). 1505) is rotatably connected to a second rotating rod (1506). The second rotating rod (1506) is provided with gears that are mirror-distributed and have the same module. The number of teeth of the gears closer to the fixed plate (1501) is less than the number of teeth of the gears farther from the fixed plate (1501). The second sliding plate (1502) is provided with a rack. The rack on the second sliding plate (1502) meshes with the gears on the second rotating rod (1506) that are closer to the fixed plate (1501). The rack on the second sliding rod (1504) meshes with the gears on the second rotating rod (1506) that are farther from the fixed plate (1501). The second sliding rod (1504) is fixedly connected to a fifth fixed bracket (1507). The threaded sleeve (1403) is splinedly connected to the second spline rod (1405). The fifth fixed bracket (1507) is rotatably connected to the first friction wheel (1406) through a mounting rod.

10. A uniform adhesive coating device for sandpaper processing according to claim 9, characterized in that: The second sliding plate (1502) is slidably connected to a mirror-distributed third sliding plate (1508) via a mounting rod. A scraper (1509) is fixedly connected to the side of the third sliding plate (1508) away from the second sliding plate (1502). The second sliding plate (1502) is rotatably connected to a mirror-distributed bidirectional telescopic rod (1510) via a mounting rod. The two telescopic ends of the bidirectional telescopic rod (1510) are respectively hinged to the adjacent third sliding plate (1508) via mounting blocks. A permanent magnet (1511) is fixedly connected to the side of the third sliding plate (1508) near the second sliding plate (1502). A mirror-distributed electromagnet (1512) is fixedly connected to the side of the second sliding plate (1502) near the third sliding plate (1508). The electromagnet (1512) is connected to the adjacent third sliding plate (1508). The permanent magnet (1511) is magnetically attracted to the gearbox (1402) on the side away from the first rotating roller (2). The output shaft of the gearbox (1402) away from the first rotating roller (2) is fixedly connected to a bidirectional lead screw (1513). The third sliding frame (1313) is slidably connected to a fourth sliding plate (1514) through a mounting rod. The fourth sliding plate (1514) is threadedly connected to the bidirectional lead screw (1513). The third sliding frame (1313) is fixedly connected to a sixth fixed frame (1515). The sixth fixed frame (1515) is provided with a button. The button on the sixth fixed frame (1515) is in contact with and pressed against the fourth sliding plate (1514). The button on the sixth fixed frame (1515) is electrically connected to the electromagnets (1512) that are distributed in a mirror image.

Images