A slotted spray sanding process in precision abrasive material preparation

Abstract

The present application relates to a kind of slit spray sanding process in precision abrasive material preparation, after washing and roughing substrate is installed in the substrate rotary vibration mechanism of sanding box, by telescopic control mechanism drive glueing mechanism and sanding mechanism respectively on substrate surface are carried out primer application and sand particle spraying, glueing mechanism includes scraper, glue cylinder, conveying pipe and leakproof structure, sanding mechanism includes slit nozzle and stirring tank, substrate is rotated under the drive of second servo motor and vibrates under the action of high-frequency motor;The process improves the uniformity of glueing and sanding by rotation and vibration complex effect, enhances the adaptability to different substrate and sand particle parameters by precision control mechanism, improves processing precision by quantitative glue supply structure and slit type injection system, and improves binder curing efficiency and surface cleanliness by combining hot air and brushing process, overall improves the processing consistency and automation level of abrasive material preparation.

Description

Technical Field

[0001] This invention relates to the field of surface treatment technology, specifically to a slit spraying and sand-planting process in the preparation of precision grinding materials. Background Technology

[0002] In the preparation of abrasive materials, it is usually necessary to uniformly apply a binder and embed abrasive particles on the substrate surface to obtain good surface adhesion and abrasive distribution. Especially in abrasive products used in high-precision machining, the uniformity of the base adhesive layer and the embedding depth and distribution density of the abrasive particles directly affect the grinding performance and product stability. Therefore, in the current precision abrasive material preparation process, the abrasive embedding process is a key step and has received extensive research and attention.

[0003] In existing technologies, primer coating and abrasive spraying are mostly performed manually or semi-automatically, such as by brushing, rolling, or ordinary spraying. Then, a simple sandblasting device is used to adhere the abrasive to the surface of the adhesive layer. However, due to the varying shapes and sizes of the substrates, uneven adhesive thickness, adhesive runs or missed areas at the edges, and uneven abrasive particle distribution are often affected by unstable airflow and inconsistent spraying angles. Furthermore, in existing equipment, the substrate is usually stationary or in a single rotating state, lacking a vibration-assisted mechanism, making it difficult for the sprayed abrasive particles to spread or embed fully into the primer, affecting subsequent curing effects and product performance.

[0004] In practical applications, the following technical problems still exist: First, the adhesive coating mechanism and the sandblasting mechanism lack precise adjustable structures, making it difficult to flexibly adjust operating parameters according to different substrate materials, coating viscosities, or abrasive particle sizes; second, adhesive coating and abrasive spraying cannot achieve integrated operation, requiring multiple manual interventions, which reduces production efficiency; third, there is a lack of dynamic adjustment mechanisms for the spraying process, making it impossible to adjust the distance or pressure to the substrate surface in real time during adhesive coating and sandblasting, affecting the stability of the coating effect; fourth, the lack of an effective post-treatment structure results in excessive adhesive residue after coating and unstable abrasive adhesion after spraying, requiring additional manual cleaning and drying, further increasing the complexity of the process. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a slit spraying and sand-planting process for the preparation of precision grinding materials. This process enables automated control, high-frequency vibration assistance, synchronous adjustment of coating and sand-planting parameters, and completes highly consistent coating and uniform sand-planting operations within the same device. This overcomes the problems of unevenness, low efficiency, and poor adaptability in existing processes, thereby improving the preparation quality and production efficiency of precision grinding materials.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A slit spraying sand-planting process for the preparation of precision abrasive materials includes the following steps: cleaning and roughening the substrate, and then installing it into a substrate rotation and vibration mechanism inside the sandblasting box; The adhesive applicator is controlled by a telescopic control mechanism on one side of the sandblasting box to move closer to the substrate in order to apply the base adhesive to the substrate surface and smooth it. The sandblasting mechanism is controlled to move closer to the substrate by the telescopic control mechanism on the other side of the sandblasting box. The distance between the nozzle of the sandblasting mechanism and the substrate is between 100-200mm, and the spraying pressure is between 0.2-0.5MPa. During the sandblasting process, the substrate is rotated by the substrate rotation and vibration mechanism while maintaining high-frequency vibration. The spraying time is controlled at 3-5 minutes, and the substrate rotates at least twice to disperse the sandblasted particles. Use a hot air gun to heat the coating evenly after spraying to accelerate the curing of the adhesive. Clean the surface with a soft-bristled brush.

[0007] Furthermore, the sandblasting box has side plates on both sides, a sealing door is hinged to the front of the sandblasting box, a funnel shape is provided at the bottom of the sandblasting box, a recycling mechanism is connected to the bottom of the sandblasting box, a mesh plate is fixed inside the sandblasting box, and the substrate rotation vibration mechanism is installed on the rear side of the upper surface of the mesh plate by bolts.

[0008] Furthermore, telescopic control mechanisms are installed inside both sides of the side plates. Tracks are symmetrically and horizontally fixed inside the side plates. The telescopic control mechanism includes a control cylinder fixed to the rear side of the inner wall of the side plate and a moving block that slides on the surface of the two track bars. The moving block is vertically arranged.

[0009] Furthermore, a bidirectional screw is vertically and rotatably mounted on the surface of the moving block, a first servo motor is fixed on the top of the moving block, the top of the bidirectional screw is mounted on the output end of the first servo motor, and slides are symmetrically screwed onto the surface of the bidirectional screw. The two slides are respectively screwed onto different threaded surfaces of the bidirectional screw, and the back of the slides is in close contact with the surface of the moving block.

[0010] Furthermore, each of the two slide ends is hinged with a first connecting rod, and the ends of the two first connecting rods opposite to the slides are hinged to a mounting base, which is vertically arranged.

[0011] Furthermore, the adhesive application mechanism includes a scraper fixed to the surface of the mounting base and an adhesive storage cylinder placed outside the side plate. The scraper is inclined to the surface of the substrate, and a slope is provided on the side of the scraper near the substrate. Anti-leakage plates are symmetrically arranged on both sides of the slope. A conveying pipe is connected between the back of the scraper and the adhesive storage cylinder. Adhesive outlet holes are evenly opened on the surface of the slope, and multiple adhesive outlet holes are connected to the conveying pipe.

[0012] Furthermore, the sandblasting mechanism includes a slit nozzle fixed to the end of the mounting base and a mixing tank placed on the outside of the side plate, wherein the slit nozzle is at the same height as the rotation axis of the substrate.

[0013] Furthermore, the substrate rotation vibration mechanism includes a fixed platform fixed on the surface of the mesh plate. The surface of the fixed platform is provided with a sliding groove, and a slider is slidably installed inside the sliding groove. A second servo motor is provided on the back of the slider, and a fixing bolt is installed at the output end of the second servo motor. The fixing bolt passes through the slider, and the substrate is installed on the fixing bolt by a nut. The substrate is placed in front of the fixed platform.

[0014] Furthermore, a high-frequency motor is fixed below the back of the fixed platform, an eccentric block is installed at the output end of the high-frequency motor, a second connecting rod is hinged to the surface of the eccentric block, and the end of the second connecting rod away from the eccentric block is hinged to the slider.

[0015] This invention provides a slit spraying and sand-coating process for the preparation of precision abrasive materials. It offers the following advantages: By setting a substrate rotation and vibration mechanism inside the sandblasting box, combined with the cooperation of a second servo motor and a high-frequency motor, the substrate can achieve synchronous rotation and high-frequency vibration during the coating and sandblasting process. This effectively solves the technical problems in the prior art where the substrate is stationary or only performs a single rotational motion, resulting in uneven distribution of the base adhesive and difficulty in fully spreading the abrasive. The high-frequency vibration promotes the uniform embedding of abrasive particles into the adhesive layer, improving the uniformity of spraying and the bonding strength, thereby enhancing the stability and service life of the polished products.

[0016] Through the coordinated action of the telescopic control mechanism and the track bar, high-precision linear adjustment of the adhesive coating mechanism and the sandblasting mechanism inside the sandblasting box is achieved. In particular, the linkage adjustment mechanism formed by the control cylinder, moving block, bidirectional screw and sliding seat structure enables the scraper and slit nozzle to accurately approach or move away from the substrate according to different substrate sizes and abrasive characteristics. This solves the problem of poor mechanism adjustment capability and inability to adapt to different working conditions in the existing technology, and improves the adaptability and operational flexibility of the equipment.

[0017] By setting up a coating mechanism consisting of a scraper, glue storage tank, delivery pump and leak-proof structure, the glue is guaranteed to be released quantitatively, continuously and evenly onto the substrate surface. With the synchronous rotation of the substrate and the inclined design of the coating mechanism, the problems of uneven coating thickness, edge missed coating or glue run-off that are common in traditional manual or simple roller coating methods can be significantly avoided, thus improving the stability of the base coat and the overall processing quality.

[0018] By setting up a sandblasting mechanism consisting of a slit nozzle and a mixing box, the slit nozzle structure optimizes the sandblasting direction and flow control. The continuous stirring inside the mixing box prevents sand particles from depositing or clumping, effectively solving the problems of unstable spraying path and uneven sand particle distribution density in traditional sandblasting equipment. The nozzle is arranged at the same height as the substrate, and combined with the precise control of the spraying distance and pressure range, the spraying quality is further improved, ensuring the uniform embedding effect of abrasive on the substrate surface.

[0019] By setting up a hot air gun and soft brush after the sandblasting process, the substrate surface can be quickly dried and residual impurities can be removed. This solves the problems of long drying time for adhesive coating, poor adhesion of sand particles, and low efficiency of manual cleaning caused by the lack of post-processing equipment in the existing process, and improves the automation level and production efficiency of the whole process. Attached Figure Description

[0020] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the installation structure of the telescopic control and sandblasting mechanism of the present invention; Figure 4 This is a schematic diagram of the installation structure of the telescopic control and glue application mechanism of the present invention; Figure 5 This is a schematic diagram of the installation structure of the adhesive application mechanism of the present invention; Figure 6 This is a schematic diagram of the mounting structure of the substrate rotation vibration mechanism of the present invention; Figure 7 For the present invention Figure 6 A rear-view stereoscopic structural diagram; Figure 8 This is a rear view schematic diagram of the substrate rotation vibration mechanism of the present invention.

[0021] The components include: 1. Sandblasting box; 11. Side panel; 12. Sealing door; 13. Mesh panel; 14. Recycling mechanism; 15. Track strip; 2. Telescopic control mechanism; 21. Control cylinder; 22. Moving block; 23. Bidirectional screw; 24. Slide; 25. First servo motor; 26. First connecting rod; 27. Mounting base; 3. Glue application mechanism; 31. Scraper; 32. Glue storage tank; 33. Conveying pipe; 34. Leak-proof plate; 35. Inclined surface; 36. Glue outlet; 4. Sandblasting mechanism; 41. Slit nozzle; 42. Mixing tank; 5. Substrate rotation vibration mechanism; 51. Fixed platform; 52. Slide groove; 53. Slider; 54. Second servo motor; 55. Fixing bolt; 56. High frequency motor; 57. Eccentric block; 58. Second connecting rod. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0023] See Figure 1-8 A slot spraying sand-coating process for precision abrasive material preparation includes the following steps: The substrate is cleaned and roughened, then installed onto a substrate rotation and vibration mechanism 5 inside a sandblasting box 1; the substrate is continuously vibrated at high frequency by a high-frequency motor 56, and a fixing bolt 55 mounted on a slider 53 is used to stabilize the substrate, which is then rotated in conjunction with a second servo motor 54 to form a composite operation; a telescopic control mechanism 2 on one side inside the sandblasting box 1 controls a coating mechanism 3 to approach the substrate to apply a primer and smooth the substrate surface; multiple adhesive outlet holes 36 on the inclined surface 35 of the scraper 31, together with an adhesive storage cylinder 32 and a delivery pipe 33, accurately and evenly deliver the adhesive to the substrate surface; anti-leakage plates 34 on both sides prevent the adhesive from overflowing laterally, thereby improving the uniformity and adhesion of the coating. The sandblasting mechanism 4 is controlled to approach the substrate by the telescopic control mechanism 2 on the other side of the sandblasting box 1. The sandblasting mechanism 4 includes a slit nozzle 41 set at the same height as the rotation axis of the substrate, which is connected to the mixing box 42 for conveying abrasive. The distance between the nozzle of the sandblasting mechanism 4 and the substrate is between 100-200mm, and the spraying pressure is between 0.2-0.5MPa. During the sandblasting process, the substrate is rotated by the substrate rotation vibration mechanism 5 while maintaining high-frequency vibration. The spraying time is controlled at 3-5 minutes, and the substrate rotates at least twice to disperse the sandblasted particles. The hot air gun installed below the end of the mounting base 27 is used to uniformly heat the sprayed substrate to accelerate the curing of the adhesive. Finally, the excess sand particles and loose adhesive on the surface of the substrate are cleaned by a soft brush.

[0024] See Figure 1-4The sandblasting box 1 has side plates 11 on both sides. The side plates 11 are used to support the telescopic control mechanism 2 and the connecting rail 15 to realize the guiding and sliding operation of the glue application mechanism 3 and the sandblasting mechanism 4. The front side of the sandblasting box 1 is hinged with a sealing door 12. The sealing door 12 is used to seal the spraying operation environment to prevent sand particles from flying or glue from evaporating. The bottom of the sandblasting box 1 is set with a funnel-shaped structure to facilitate the natural fall of particles. The bottom of the sandblasting box 1 is connected to a recycling mechanism 14. The recycling mechanism 14 can uniformly recycle the sprayed residual glue and sand, improving the utilization rate of raw materials. The sandblasting box 1 has a bearing structure mesh plate 13 fixed inside. The mesh plate 13 is used to provide a stable support platform for the installation of the substrate rotation vibration mechanism 5. The substrate rotation vibration mechanism 5 is installed on the rear side of the upper surface of the mesh plate 13 by bolts to realize the coordinated work of fixing and vibration functions.

[0025] See Figure 1-4 Both side plates 11 are equipped with telescopic control mechanisms 2. The structure of the telescopic control mechanisms 2 is used to achieve precise adjustment of the position of the scraper 31 and the slit nozzle 41. The side plates 11 are symmetrically and horizontally fixed with track bars 15. The track bars 15 serve as sliding guide components to limit the movement of the moving block 22 along the set trajectory, ensuring stable and reliable position adjustment. The telescopic control mechanism 2 includes a control cylinder 21 fixed to the rear side of the inner wall of the side plate 11 and a moving block 22 sliding on the surface of the two track bars 15. The moving block 22 is set in the vertical direction and is connected to the piston rod of the control cylinder 21 to form a guide propulsion mechanism, ensuring stable movement and rapid response during sliding.

[0026] See Figure 3 A bidirectional screw 23 is vertically and rotatably mounted on the surface of the moving block 22. The bidirectional screw 23 has a symmetrical thread structure in the middle and can drive the slides 24 in two directions to move synchronously in opposite directions. A first servo motor 25 is fixed on the top of the moving block 22. The first servo motor 25 drives the bidirectional screw 23 to rotate through the output shaft. The two sections of the bidirectional screw 23 have opposite thread directions and correspond to the matching internal threads of the slides 24 respectively. The back of the slides 24 is in close contact with the surface of the moving block 22, and a stable guide sliding connection structure is formed by the slider limiting structure and the track bar 15, thereby ensuring that the linear reciprocating adjustment of the mounting base 27 is more accurate.

[0027] See Figure 3-5 Both slides 24 have a first connecting rod 26 hinged to their ends. The first connecting rod 26 connects the slides 24 to the mounting base 27, allowing the mounting base 27 to be tilted closer to or further away during bidirectional sliding. The ends of the two first connecting rods 26 away from the slides 24 are hinged to the mounting base 27. The mounting base 27 is vertically set and serves as a load-bearing support component for the glue application mechanism 3 and the sandblasting mechanism 4. It is used for stable control during the overall advancement and position adjustment process, ensuring accurate spraying and reliable repeatable positioning.

[0028] See Figure 3-5 The adhesive application mechanism 3 includes a scraper 31 fixed to the surface of the mounting base 27 and an adhesive storage cylinder 32 placed outside the side plate 11. An adhesive delivery pump is installed inside the adhesive storage cylinder 32. The delivery pump is connected to the delivery pipe 33 to achieve quantitative adhesive supply. The scraper 31 is inclined to the surface of the substrate. An inclined surface 35 is provided on the side of the scraper 31 near the substrate. The inclined surface 35 has an arc structure to adapt to the curvature characteristics of the rotating substrate. Anti-leak plates 34 are symmetrically arranged on both sides of the inclined surface 35 to block the lateral overflow of adhesive. The back of the scraper 31 is connected to the adhesive storage cylinder 32 through the delivery pipe 33. The internal channel of the delivery pipe 33 is connected to multiple adhesive outlet holes 36 on the surface of the inclined surface 35 to ensure that the adhesive is evenly and continuously coated on the surface while the substrate is rotating, thereby effectively improving the uniformity and stability of the primer coating.

[0029] See Figure 1-4 The sandblasting mechanism 4 includes a slit nozzle 41 fixed to the end of the mounting base 27 and a mixing box 42 placed outside the side plate 11. The mixing box 42 is equipped with a mixing component to keep the sand particles evenly distributed and prevent particle size stratification or nozzle clogging. The slit nozzle 41 has a transverse narrow slit structure that can control the spray direction and flow rate, so that the sand particles are ejected in a stable bundle and accurately cover the surface of the rotating substrate. The slit nozzle 41 is set at the same height as the rotation axis of the substrate, thereby ensuring that the spray path is in consistent contact with the substrate surface and effectively avoiding local accumulation or spray dead angle problems.

[0030] See Figure 6-8 The substrate rotation vibration mechanism 5 includes a fixed platform 51 fixed to the surface of the mesh plate 13. The fixed platform 51 is an integral cast structure with a straight slide groove 52 on the platform. A slider 53 is slidably installed inside the slide groove 52. A fixing bolt 55 for mounting the substrate is provided on the slider 53. The fixing bolt 55 passes through the slider 53 and is locked to the substrate by a nut. A second servo motor 54 is installed on the back of the slider 53. The output shaft of the second servo motor 54 drives the fixing bolt 55 to achieve uniform rotation of the substrate, so as to complete the compound motion in conjunction with the vibration device. The front side of the fixed platform 51 is the substrate mounting area. The substrate is coaxially aligned with the fixing bolt 55 through its rotation axis to ensure processing stability.

[0031] See Figure 6-8 A high-frequency motor 56 is fixed below the back of the fixed platform 51. An eccentric block 57 is installed at the output end of the high-frequency motor 56. A second connecting rod 58 is hinged to the outer surface of the eccentric block 57. The end of the second connecting rod 58 away from the eccentric block 57 is hinged to the slider 53. The eccentric rotation of the eccentric block 57 drives the second connecting rod 58 to swing back and forth, realizing the high-frequency reciprocating movement of the slider 53 inside the slide groove 52, thereby forming high-frequency vibration on the substrate. This structure effectively improves the bonding strength between the abrasive particles and the primer, optimizes the distribution of sprayed particles, and enhances the uniformity and adhesion of the finished product. Example

[0032] See Figure 6-8 In this embodiment, the substrate rotation and high-frequency vibration are coordinated by the substrate rotation and vibration mechanism 5 set inside the sandblasting box 1. The fixed table 51 is precision machined from Q235 steel, and the table surface is machined with a sliding groove 52. A slider 53 is slidably installed in the sliding groove 52. A second servo motor 54 (model Panasonic A6 series 200W servo motor) is installed on the back of the slider 53. The motor drives the fixing bolt 55 to rotate through the coupling. The external thread in the middle of the bolt body is used for the nut to lock the substrate. A high-frequency motor 56 (model ZD-MJ type 12V high-speed vibration motor) is installed below the fixed table 51. Its output end is connected to the eccentric block 57. The outer periphery of the eccentric block 57 is hinged to the second connecting rod 58. The other end of the second connecting rod 58 is hinged to the slider 53. The high-frequency motor 56 drives the eccentric block 57 to rotate, so that the slider 53 vibrates back and forth, forming a composite motion of substrate rotation and high-frequency vibration, which effectively improves the uniformity of sand grain embedding on the surface of the base adhesive.

[0033] Comparative Case: In traditional structures, the substrate is driven to rotate by a regular stepper motor, lacking a vibration-assisted mechanism. During sandblasting, local accumulation of sand particles is easily caused by gravity settling or surface tension, resulting in uneven sand application. With the composite structure in this embodiment, the sprayed sand particles can be quickly spread out and evenly distributed under vibration assistance, significantly improving the sand application effect. Example

[0034] See Figure 1-4 , Figure 3 In this embodiment, a telescopic control mechanism 2 is set up to achieve multi-directional precise adjustment of the adhesive application mechanism 3 and the sandblasting mechanism 4. The telescopic control mechanism 2 includes a control cylinder 21 (model SMCMGPM50-200) installed on the rear side of the inner wall of the side plate 11. The control cylinder 21 pushes the moving block 22 to slide linearly along the track 15 through the piston rod. A bidirectional screw 23 is vertically installed on the back of the moving block 22. The top of the bidirectional screw 23 is connected to a first servo motor 25 (model Delta ASDA-B2-400W) to control the bidirectional rotation of the screw, thereby driving the two slides 24 to move towards or away from each other. The ends of the two slides 24 are connected to the mounting base 27 through the first connecting rod 26. The mounting base 27 then drives the scraper 31 or the slit nozzle 41 to move closer to or away from the substrate to achieve high-precision adjustment.

[0035] Comparative Case: In traditional spraying equipment, the mechanism adjustment relies on manual operation or a single-axis propulsion structure, which results in slow adjustment response, poor positioning accuracy, and difficulty in adapting to changes in the characteristics of different substrates and particles. After introducing a multi-axis linkage and servo drive mechanism in this embodiment, not only is the adjustment response fast, but the positioning accuracy can also be controlled within ±0.1mm, effectively improving the overall process adaptability of the machine. Example

[0036] See Figure 3-5In this embodiment, a glue storage cylinder 32 (made of 304 stainless steel pressurized storage tank) is set in the glue coating mechanism 3. The glue storage cylinder 32 is equipped with a pneumatic delivery pump (model NITTO LA-80), which is connected to the back of the scraper 31 through the delivery pipe 33. The scraper 31 is made of aluminum alloy, with an inclined surface 35 on the front side. The surface of the inclined surface 35 has evenly distributed glue outlet holes 36 with a diameter of 0.8mm. Anti-leakage plates 34 are symmetrically installed on the left and right sides. During the coating process, the substrate rotates and keeps the lower edge of the inclined surface 35 at the same height as the axis of rotation of the substrate. The glue is stably released through the glue outlet holes 36. Combined with the inclined structure and rotation method of the scraper, the glue is evenly scraped onto the surface of the substrate to form a base glue film layer of uniform thickness.

[0037] Comparative Case: In traditional roller coating or spray coating methods, the adhesive spraying is unstable, prone to stringing or forming an adhesive layer, and there is a risk of missed coating at the edges; after adopting the structure of this embodiment, the adhesive layer thickness error is controlled within ±10μm, the surface smoothness is significantly improved, and the uniformity of subsequent sand application is enhanced. Example

[0038] See Figure 1-4 In this embodiment, the sandblasting mechanism 4 includes a slit nozzle 41 (made of stainless steel with a precision laser-cut slit width of 1.2mm) and a mixing tank 42. The mixing tank 42 is equipped with a magnetic stirrer (model IKA RW20) to ensure that the sand particles remain in a uniform suspension state before the spraying process, preventing particle size stratification. The slit nozzle 41 is pressurized by a high-pressure air source, with the air pressure controlled at about 0.3MPa, so that the sand particles are stably sprayed out in the form of a bundle, accurately aligned with the front surface of the substrate, and combined with rotational vibration to form a uniform coverage. The nozzle and the substrate axis are at the same height to ensure that the sand output direction is stable and consistent, preventing spray deviation.

[0039] Comparative Case: Common nozzles are round or diffused structures, which can cause problems such as inconsistent sand discharge angles, excessively large or narrow coverage widths during sandblasting, resulting in localized sand particle aggregation or insufficient coverage. In this embodiment, the narrow slit nozzle makes the sandblasting range more controllable, the particle distribution density more stable, and the overall uniformity improved by more than 20%. Example

[0040] See Figure 1-5 In this embodiment, a hot air gun (model LEISTERHOTWIND) is provided at the lower end of the mounting base 27 to rapidly heat the surface of the substrate after spraying. The temperature control is set to 60-80℃ to accelerate the surface curing of the primer. At the same time, a soft brush mechanism (the brush bristles are made of anti-static nylon material with a thickness of 0.12mm) is provided next to the hot air gun. The soft brush slowly rotates against the surface of the substrate through a synchronous transmission mechanism to clean away loose sand and unadheded particles, ensuring the surface of the finished product is clean and improving the yield of the process.

[0041] Comparative Case: In structures without hot air and cleaning modules, the adhesive layer often needs to air dry naturally for 4 to 6 hours, and residual sand particles on the surface need to be manually brushed off, resulting in low efficiency and poor stability. This embodiment achieves integrated operation of rapid hot air curing and automatic cleaning, shortening the overall curing time to less than 15 minutes and improving cleaning efficiency by more than 3 times.

[0042] Working principle: First, adjust the pressure of the adhesive application mechanism 3 and the sandblasting mechanism 4 according to the size of the substrate, the coating, and the particle size of the sand. Open the sealing door 12 to install the substrate on the surface of the fixing bolt 55 and lock it in place with the nut. Start the second servo motor 54 to drive the substrate to rotate evenly. At the same time, start the high-frequency motor 56 to drive the eccentric block 57 to rotate around the output axis. Then, through the connecting rod 58, drive the slider 53 to perform high-frequency reciprocating vibration inside the slide groove 52. At this time, the substrate vibrates at high frequency during rotation to level the base adhesive and sprayed sand particles on the coating surface. After the substrate is installed, the first servo motor 25 is started to control the bidirectional screw 23 to rotate. Then, the two slides 24 are driven to move synchronously in opposite directions through different thread surfaces. When the two slides 24 are close to each other, the mounting seat 27 can be controlled to move closer to the substrate rotation vibration mechanism 5, and vice versa, so as to control the position of the scraper 31 and the slit nozzle 41. The control cylinder 21 is started to control the moving block 22 to move along the track 15, thereby controlling the distance between the scraper 31 and the slit nozzle 41 and the front surface of the substrate. After the substrate is installed, the scraper 31 is first moved closer to the substrate by the telescopic control mechanism 2, and the lower edge of the inclined surface 35 is adjusted to be close to the substrate. The delivery pump inside the glue storage cylinder 32 is started to inject glue into the scraper 31 through the delivery pipe 33. The glue flows out through multiple glue outlets 36 and is placed in the space between the inclined surface 35 and the substrate surface. By rotating the substrate, the glue is evenly applied to the substrate surface. The anti-leakage plates 34 on both sides can prevent the glue from overflowing from the sides. When applying the glue, the slider 53 should be placed at the very end of the groove 52. The lower edge of the inclined plane 35 is kept at the same height as the rotation axis of the substrate. Then the scraper 31 is withdrawn, and the slit nozzle 41 on the other side is moved to the front of the substrate. The sand particles inside the mixing box 42 are evenly sprayed onto the substrate surface by high-pressure airflow. During the sandblasting process, the substrate is subjected to high-frequency vibration to promote a more even distribution of abrasive on the substrate surface. The speed of the high-frequency motor 56 can be adjusted by the controller to control the vibration frequency, thereby realizing automatic glue coating and sandblasting. The rotation speed of the substrate corresponds to the amount of glue removed during glue coating and the pressure during sandblasting. A hot air gun and a soft brush can be installed below the end of the mounting block 27 to allow for drying and cleaning after sandblasting.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A slit spraying and sand-coating process for preparing precision grinding materials, characterized in that: The process includes the following steps: cleaning and roughening the substrate, and then installing it into the substrate rotation vibration mechanism (5) inside the sandblasting box (1); The telescopic control mechanism (2) on one side of the sandblasting box (1) controls the glue application mechanism (3) to approach the substrate so as to apply the base glue to the surface of the substrate and smooth it. The sandblasting mechanism (4) is controlled to approach the substrate by the telescopic control mechanism (2) on the other side of the sandblasting box (1). The distance between the nozzle of the sandblasting mechanism (4) and the substrate is between 100-200mm. The spraying pressure is between 0.2-0.5MPa. During the sandblasting process, the substrate is rotated by the substrate rotation vibration mechanism (5) while maintaining high-frequency vibration. The spraying time is controlled at 3-5 minutes. The substrate rotates at least twice to disperse the sandblasted particles. Use a hot air gun to heat the coating evenly after spraying to accelerate the curing of the adhesive. Clean the surface with a soft-bristled brush; The above-mentioned sandblasting box (1) is provided with side plates (11) on both sides. A sealing door (12) is hinged to the front of the sandblasting box (1). The bottom of the sandblasting box (1) is provided with a funnel shape. A recycling mechanism (14) is connected to the bottom of the sandblasting box (1). A mesh plate (13) is fixed inside the sandblasting box (1). The substrate rotation vibration mechanism (5) is installed on the rear side of the upper surface of the mesh plate (13) by bolts. Both sides of the side plate (11) are equipped with telescopic control mechanisms (2). Symmetrical horizontal rails (15) are fixed inside the side plate (11). The telescopic control mechanism (2) includes a control cylinder (21) fixed to the rear side of the inner wall of the side plate (11) and a moving block (22) sliding on the surfaces of the two rails (15). The moving block (22) is vertically arranged, and a bidirectional screw (23) is vertically rotatably mounted on the surface of the moving block (22). A first servo motor (25) is fixed to the top of the moving block (22). The top of the screw (23) is mounted on the output end of the first servo motor (25). The surface of the bidirectional screw (23) is symmetrically screwed with slides (24). The two slides (24) are screwed onto different thread surfaces of the bidirectional screw (23). The back of the slides (24) is in close contact with the surface of the moving block (22). The ends of the two slides (24) are hinged with first connecting rods (26). The ends of the two first connecting rods (26) away from the slides (24) are hinged to the mounting base (27). The mounting base (27) is vertically set.

2. The slit spraying and sand-planting process in the preparation of precision grinding materials according to claim 1, characterized in that: The glue application mechanism (3) includes a scraper (31) fixed on the surface of the mounting base (27) and a glue storage cylinder (32) placed outside the side plate (11). The scraper (31) is inclined to the surface of the substrate. The scraper (31) has a slope (35) on the side close to the substrate. Leak-proof plates (34) are symmetrically arranged on both sides of the slope (35). A conveying pipe (33) is connected between the back of the scraper (31) and the glue storage cylinder (32). Glue outlet holes (36) are evenly opened on the surface of the slope (35). All of the glue outlet holes (36) are connected to the conveying pipe (33).

3. The slit spraying and sand-planting process in the preparation of precision grinding materials according to claim 2, characterized in that: The sandblasting mechanism (4) includes a slit nozzle (41) fixed at the end of the mounting base (27) and a mixing tank (42) placed outside the side plate (11). The slit nozzle (41) is at the same height as the rotation axis of the substrate.

4. The slit spraying and sand-planting process for preparing precision grinding materials according to claim 1, characterized in that: The substrate rotation vibration mechanism (5) includes a fixed platform (51) fixed on the surface of the mesh plate (13). A groove (52) is provided on the surface of the fixed platform (51). A slider (53) is slidably installed inside the groove (52). A second servo motor (54) is provided on the back of the slider (53). A fixing bolt (55) is installed at the output end of the second servo motor (54). The fixing bolt (55) passes through the slider (53). The substrate is installed on the fixing bolt (55) by a nut. The substrate is placed in front of the fixed platform (51).

5. The slit spraying and sand-planting process in the preparation of precision grinding materials according to claim 4, characterized in that: A high-frequency motor (56) is fixed below the back of the fixed platform (51). An eccentric block (57) is installed at the output end of the high-frequency motor (56). A second connecting rod (58) is hinged to the surface of the eccentric block (57). One end of the second connecting rod (58) away from the eccentric block (57) is hinged to the slider (53).

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