A self-cleaning glue preparation device and a preparation method

Abstract

This invention discloses a self-cleaning adhesive preparation device and method, relating to the field of adhesive preparation technology. It includes a feeding mechanism, a reactor, a stirring mechanism, and a lifting mechanism. The lifting mechanism is fixedly mounted on one or both sides of a mounting frame and connected to a movable top cover, driving the movable top cover to descend within the reactor to simultaneously clean the stirring mechanism and the reactor's inner wall. This invention, through the combination of a folding paddle design and a lifting movable top cover structure, can simultaneously clean the reactor's inner wall and paddles after stirring, solving the problem of difficult removal of residual adhesive in existing equipment. This effectively avoids the impact of residual adhesive on the quality of subsequent products. Furthermore, it eliminates the need for manual cleaning, reducing labor intensity and safety hazards, ensuring the stability of the reaction environment, thereby improving the accuracy of adhesive preparation and the stability of product performance.

Description

Technical Field

[0001] This invention relates to the field of adhesive preparation technology, specifically to a self-cleaning adhesive preparation apparatus and method. Background Technology

[0002] In the glue production process, a glue mixing machine is used to stir and mix various component glue solutions to ensure the performance indicators of the glue. However, glue solutions usually have high viscosity, and after stirring, they are very easy to remain on the inner wall of the equipment, the stirring shaft, and the stirring blades, forming a residue layer that is difficult to completely remove.

[0003] For example, a device for preparing adhesive for sticky roller film disclosed in CN221015518U includes a main body and a stirring preparation mechanism. The stirring preparation mechanism is located above the main body. The main body includes a base and a preparation box, with the preparation box fixedly installed on the upper end of the base. The main body also includes a feed pipe, a movable plate, a sealing plate, and a high-efficiency discharge assembly. The feed pipe is fixedly installed at the front end of the upper end of the preparation box, and the movable plate is movably installed on the left end of the feed pipe.

[0004] And a paper tube spare glue mixing device disclosed in CN223874862U, which includes a frame, a mixing tank, a motor, a feed port, and a rotating shaft. The rotating shaft is coaxially connected to the output end of the motor. The rotating shaft is connected to one end of three first connecting rods at the same height. The three first connecting rods are evenly distributed. The other end of the three first connecting rods is connected to the head end of three stirring blades with the same shape. The stirring blades are spiral-shaped. The three stirring blades are set at the same height and are staggered. The bottom of the mixing tank is conical and has a discharge port. The distance from the head end of the stirring blade to the rotating shaft is greater than the distance from its tail end to the rotating shaft. The end of the rotating shaft is connected to a circular bottom plate. Three second connecting rods are evenly distributed on the bottom plate. The three second connecting rods are connected to the ends of the three stirring blades respectively. The bottom plate does not contact the bottom of the mixing tank.

[0005] The residual adhesive in the aforementioned adhesive production equipment will accumulate with each production batch. On the one hand, it can easily clog the discharge pipe and feed channel of the equipment, hinder the normal operation of the mixing device, increase mechanical wear of the equipment, and significantly reduce the service life of the equipment. On the other hand, the residual adhesive will mix into the adhesive in subsequent batches, causing an imbalance in the composition ratio of the adhesive, affecting the curing effect, bonding strength and other key properties of the adhesive, and seriously reducing the stability of the adhesive quality.

[0006] Therefore, this application proposes a stirring device that can effectively reduce adhesive residue and achieve automatic and efficient cleaning. Summary of the Invention

[0007] This invention provides a self-cleaning adhesive preparation device and method, aiming to solve the problems of existing adhesive preparation equipment, such as difficulty in completely removing residual adhesive from the stirring blades and inner walls, low efficiency of manual cleaning, and residual adhesive affecting the quality of subsequent batches of adhesive.

[0008] To achieve the above objectives, the present invention provides a self-cleaning adhesive preparation apparatus, comprising: The feeding mechanism is connected to multiple eccentrically distributed feed pipes; The reactor has an inlet and an outlet, as well as a movable top cover. The inlet is connected to the feeding mechanism through an inlet pipe; a mounting bracket is fixedly installed on its top. The stirring mechanism is located in the middle of the mounting frame and extends through the movable top cover into the reactor; its lower part is equipped with a foldable blade that can be stored coaxially with the stirring shaft. The lifting mechanism is fixed on one or both sides of the mounting frame and connected to the movable top cover to drive the movable top cover to descend inside the reactor, thereby simultaneously cleaning the stirring mechanism and the inner wall of the reactor.

[0009] Preferably, the feeding mechanism includes a storage tank and a peristaltic pump, with the peristaltic pump connected to the storage tank and the reactor via a feed pipeline.

[0010] Preferably, the movable top cover is provided with an annular sealing ring on its outer ring, and the annular sealing ring slides in contact with the inner wall of the reactor.

[0011] Preferably, the stirring mechanism further includes a drive motor, which is fixedly mounted in the middle of the mounting frame. The output end of the drive motor is connected to the stirring shaft through a coupling or reducer. The stirring shaft is rotatably connected to the central hole of the mounting frame. The blades are multi-bladed fan-shaped rods with an included angle of 90° or 120°. One end of each blade is hinged to the end of the stirring shaft, so that after being stored, it is located on the same vertical axis as the stirring shaft to form an integrated cylindrical structure. The descending movable top cover slides to remove the adhesive residue from the surface of the stored blades.

[0012] Preferably, the impeller is provided with several receiving grooves along the axial direction, and a stirring rod is hinged to one end of the receiving groove; a beveled surface is provided at the hinge of the receiving groove and the stirring rod, so that the angle between the stirring rod and the impeller is 45°-70° after the stirring rod descends by centrifugal force.

[0013] Preferably, the lifting mechanism is a hydraulic pump or an electric push rod, and the output end of the hydraulic pump or electric push rod is connected to the end face of the movable top cover; Alternatively, the lifting mechanism includes a lifting motor and a lifting screw. The lifting motor is fixed to the upper part of the reactor by a bracket, and the lifting screw is connected to the output end of the lifting motor by a coupling. A screw sleeve is provided on the movable top cover, and the screw sleeve is threadedly connected to the lifting screw.

[0014] Preferably, the movable top cover is provided with an exhaust port, which is connected to a vacuum pump via a solenoid valve.

[0015] Preferably, the movable top cover has a circular hole in the middle, and a double-layer lip seal ring is installed inside the circular hole. The double-layer lip seal ring has two semi-circular structures, a limiting groove and an annular groove in the middle of the movable top cover, and limiting rods at both ends of the double-layer lip seal ring, which slide into the annular groove; A spring is fitted onto the limiting rod, and one end of the spring is connected to the inner wall of the limiting groove. An annular rotating component is installed inside the annular groove. An arc-shaped block is installed at the upper end of the annular rotating component. The arc-shaped block and the end of the limiting rod are respectively provided with inclined surfaces. The outer ring of one of the arc-shaped blocks is provided with several teeth. A limiting mounting plate is detachably connected to the movable top cover by bolts. A stepper motor is connected to the limiting mounting plate. The output end of the stepper motor passes through the limiting mounting plate and meshes with the teeth through gears to drive the annular block to drive the annular rotating component to rotate in the annular groove. This causes the inclined surface of the arc-shaped block to slide and abut against the inclined surface at the end of the limiting rod, thereby pushing the limiting rod to drive the double-layer lip seal ring to move and close relative to each other, clamping it on the stirring shaft. The movable top cover, which moves downward, drives the double-layer lip seal ring to clean the stirring shaft and the multiple blades after they are stored.

[0016] A method for preparing adhesive, using the above-mentioned self-cleaning adhesive preparation apparatus, includes the following steps: S1: Feeding. The peristaltic pump of the feeding mechanism delivers different raw materials in the storage tank to the reactor in batches and with precision through the eccentrically distributed feeding pipeline. S2: Stirring. After the raw materials are fed, close the one-way valve of the feed pipeline, start the vacuum pump to adjust the gas pressure in the reactor to a suitable range, and at the same time start the stirring mechanism. Drive the motor to drive the stirring shaft to rotate, and the blades unfold under the action of centrifugal force to fully stir and mix the raw materials in the reactor. S3: After stirring is completed, turn off the stirring mechanism. The blades lose centrifugal force and hang down under their own gravity to automatically retract. Start the lifting mechanism to drive the movable top cover to press down. The annular sealing ring on the outer ring of the movable top cover and the double-layer lip sealing ring in the middle scrape along the side wall of the reactor, the stirring shaft and the blades to remove residual adhesive on the inner wall, so as to realize synchronous automatic cleaning of the inner wall of the reactor and the stirring blades. S4: Discharge. After cleaning, open the valve at the discharge port at the bottom of the reactor. The finished glue is discharged under its own weight and the pressure generated by the downward pressure of the movable top cover, completing the preparation of one batch of glue.

[0017] Compared with existing technologies, it has the following beneficial effects: 1. Achieve synchronous automatic cleaning: Through the combination of foldable blade design and lifting movable top cover structure, the inner wall of the reactor and blades can be cleaned simultaneously after stirring. This solves the problem of difficult removal of residual adhesive in existing equipment, effectively avoids the impact of residual adhesive on the quality of subsequent products, and eliminates the need for manual cleaning, reducing labor intensity and safety hazards.

[0018] 2. Improved preparation accuracy and product stability: The feeding mechanism adopts an eccentrically distributed feeding pipeline and a high-precision peristaltic pump to achieve precise batch feeding of raw materials; the reactor has good airtightness, and the exhaust port, stirring mechanism, and movable top cover lifting linkage control ensure the stability of the reaction environment, thereby improving the glue preparation accuracy and product performance stability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a self-cleaning adhesive preparation device according to the present invention; Figure 2 This is a schematic diagram of the reactor of the present invention; Figure 3 This is a schematic diagram of the stirring mechanism and lifting mechanism of the present invention; Figure 4 This is a schematic diagram of the multi-blade hinge of the present invention; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the movable cover lifting mechanism of the present invention; Figure 7 This is a schematic diagram of the movable cover plate and mounting bracket of the present invention; Figure 8 This is a schematic diagram of the impeller and stirring rod of the present invention; Figure 9 This is a schematic diagram of the cooperation between the impeller and the stirring rod of the present invention; Figure 10 for Figure 9 Enlarged view of point B in the middle; Figure 11 This is a schematic diagram of the installation of the limiting mounting plate and the movable cover plate of the present invention; Figure 12 This is a schematic diagram of the annular rotating component and the double-layer lip seal ring of the present invention; Figure 13 for Figure 12 Enlarged view of point C in the middle; Figure 14 This is a schematic diagram of the limiting groove and annular groove of the movable cover plate of the present invention; Figure 15 This is a schematic diagram of the movable cover plate after the annular rotating component and the limiting mounting plate of the present invention have been removed; Figure 16 for Figure 15 Enlarged view of point D; Figure 17 This is a schematic diagram of the interaction between the annular rotating component and the stepper motor of the present invention; Figure 18 This is a schematic diagram of the double-layer lip seal ring of the present invention fitting the stirring shaft.

[0021] Reference numerals: 1-Feeding mechanism; 11-Storage tank; 12-Peristaltic pump; 13-Feed pipeline; 2-Reactor; 21-Outlet; 22-Valve; 23-Modible top cover; 231-Limiting groove; 232-Annular groove; 24-Annular sealing ring; 25-Exhaust port; 26-Vacuum pump; 27-Double-layer lip seal; 271-Limiting rod; 3-Stirring mechanism; 31-Drive motor; 32-Stirring shaft; 33-Impeller; 331-Collection trough; 34-Stirring rod; 35-Beveled surface; 4- Lifting mechanism; 5-Mounting bracket; 6-Spring; 7- Annular rotating component; 71- Arc-shaped block; 72- Tooth; 8-Limit mounting plate; 9-Stepper motor. Detailed Implementation

[0022] To better understand the structure, functional features, and advantages of the present invention, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings: Example: like Figure 1 and Figure 2 As shown, the present invention provides a self-cleaning adhesive preparation apparatus, comprising: The feeding mechanism 1 is connected to multiple eccentrically distributed feed pipes 13; Reactor 2 has an inlet and an outlet 21 and a movable top cover 23. The inlet is connected to the feeding mechanism 1 through the inlet pipe 13. Reactor 2 is a cylindrical barrel made of 304 stainless steel with a polished inner wall, which has good corrosion resistance and structural stability. A valve 22 is provided at the outlet 21 to control the discharge of the finished glue. A mounting bracket 5 is fixedly installed on the top of reactor 2. The stirring mechanism 3 is located in the middle of the mounting frame 5 and extends through the movable top cover 23 into the reactor 2; its lower part is provided with a foldable blade 33 that can be stored coaxially with the stirring shaft 32. The lifting mechanism 4 is fixedly installed on one or both sides of the mounting frame 5 and connected to the movable top cover 23 to drive the movable top cover 23 to descend inside the reactor 2, so as to simultaneously clean the stirring mechanism 3 and the inner wall of the reactor 2.

[0023] See Figure 1 and Figure 2 The feeding mechanism 1 includes a storage tank 11 and a peristaltic pump 12. The peristaltic pump 12 is connected to the storage tank 11 and the reactor 2 via feed pipes 13. Specifically, there are several feed pipes 13 eccentrically distributed at the bottom of the reactor 2, each connected to a different raw material chamber of the storage tank 11. Each pipe is connected to the output end of the peristaltic pump 12, and each pipe is equipped with a one-way valve. The flow rate of the peristaltic pump 12 is 0.1-10 L / min, with an accuracy of ±1%.

[0024] Specifically, several eccentrically distributed feed pipes 13 are connected at one end to the storage tank 11 and at the other end to the inside of the reactor 2. A peristaltic pump 12 is connected in series with the feed pipes 13 to achieve precise control of raw material delivery.

[0025] Specifically, see Figure 1 The storage tank 11 is equipped with different raw material chambers. Each feed pipe 13 is connected to a different raw material chamber of the storage tank 11, and each pipe is connected to the output end of the peristaltic pump 12. Each feed pipe 13 is also equipped with a one-way valve. The one-way valve is located at the end of the feed pipe 13 near the reactor 2 to prevent the glue in the reactor 2 from flowing back to the feed pipe 13, thus avoiding raw material contamination and pipe blockage.

[0026] See Figure 3 The movable top cover 23 has an annular sealing ring 24 on its outer ring, which slides in contact with the inner wall of the reactor 2. Specifically, the annular sealing ring 24 is made of silicone rubber and has a thickness of 5-8 mm. Its outer ring has an interference fit of 0.3-0.5 mm with the inner wall of the reactor 2, ensuring the airtightness of the reactor 2 and providing a basis for subsequent cleaning.

[0027] See Figures 2 to 7The stirring mechanism 3 also includes a drive motor 31, which is fixedly mounted in the middle of the mounting frame 5. The output end of the drive motor 31 is connected to the stirring shaft 32 via a coupling or reducer. The stirring shaft 32 is rotatably connected to the central hole of the mounting frame 5 via a bearing. The blades 33 are multi-bladed fan-shaped rods with an included angle of 90° or 120°. One end of each blade 33 is hinged to the end of the stirring shaft 32, so that when retracted, they are located on the same vertical axis as the stirring shaft 32, forming an integrated cylindrical structure. The descending movable top cover 23 slides to remove the adhesive residue from the retracted blades 33. Specifically, the lower end of the stirring shaft 32 is hinged to the folding blades 33 via a pin-type hinge component. There are four blades 33, each blade 33 being a quarter-cylinder. During stirring, the blades 33 open, and when retracted, their total diameter is the same as that of the stirring shaft 32.

[0028] See Figure 3 The lifting mechanism 4 is a hydraulic pump or an electric push rod, and the output end of the hydraulic pump or electric push rod is connected to the end face of the movable top cover 23.

[0029] As an alternative, the lifting mechanism 4 includes a lifting motor and a lifting screw. The lifting motor is fixed to the upper part of the reactor 2 by a bracket, and the lifting screw is connected to the output end of the lifting motor by a coupling. A screw sleeve is provided on the movable top cover 23, and the screw sleeve is threadedly connected to the lifting screw.

[0030] See Figure 3 and Figure 4 The movable top cover 23 is provided with an exhaust port 25, which is connected to the vacuum pump 27 via a solenoid valve 26. Specifically, the exhaust port 25 is located at the edge of the top cover, and a solenoid valve 26 is provided between the exhaust port 25 and the vacuum pump 27. The opening and closing state of the valve 22 is linked to the working state of the stirring unit and the lifting and lowering state of the top cover.

[0031] See Figure 2 and Figure 3 The movable top cover 23 has a central circular hole containing a double-lip seal 27 made of fluororubber. The inner diameter of the double-lip seal 27 is 0.1-0.2 mm from the outer diameter of the retracted impeller. As the impeller 33 retracts and descends with the top cover, it effectively scrapes away the adhesive adhering to the impeller surface, ensuring smooth rotation of the stirring shaft 32 and achieving a dynamic seal between the stirring mechanism 3 and the movable top cover 23. Simultaneously, it efficiently removes residual adhesive from the impeller 33 surface during cleaning. As the retracted impeller 33 is pressed down by the movable top cover 23, the double-lip seal 27 in the central circular hole scrapes away the adhesive from the impeller 33 surface, thus achieving simultaneous cleaning of the reactor 2's inner wall and the impeller 33. Furthermore, the downward pressing of the movable top cover 23 also assists in the discharge of finished adhesive from the discharge port 21, improving discharge efficiency.

[0032] As another embodiment of the present invention, such as Figures 8 to 10 As shown, the blade 33 is provided with several receiving slots 331 along the axial direction. A stirring rod 34 is hinged to one end of the receiving slot 331. A chamfered surface 35 is provided at the hinge point between the receiving slot 331 and the stirring rod 34, so that the angle between the stirring rod 34 and the blade 33 is 45°-70° after the stirring rod 34 descends due to centrifugal force. The stirring rod 34 automatically hangs down after the blade 33 rotates and opens, and forms a certain angle with the blade 33. Its end is inclined inward, so that during the process of the blade 33 hanging down after losing centrifugal force, the stirring rods 34 on multiple blades 33 can be folded into the receiving slots 331 through contact.

[0033] As another embodiment of the present invention, such as Figures 11 to 18 As shown, the double-layer lip seal ring 27 has two semi-circular structures, a limiting groove 231 and an annular groove 232 in the middle of the movable top cover 23, and limiting rods are provided at both ends of the double-layer lip seal ring 27. The limiting rods slide into the annular groove 232. A spring 6 is fitted on the limiting rod, and one end of the spring 6 is connected to the inner wall of the limiting groove 231. An annular rotating component 7 is provided in the annular groove 232. An arc-shaped block 71 is provided at the upper end of the annular rotating component 7. An inclined surface is provided corresponding to the end of the arc-shaped block 71 and the limit rod. A number of teeth 72 are provided on the outer ring of one of the arc-shaped blocks 71. A limit mounting plate 8 is detachably connected to the movable top cover 23 by bolts. A stepper motor 9 is connected to the limit mounting plate 8. The output end of the stepper motor 9 passes through the limit mounting plate 8 and meshes with the teeth 72 through gears to drive the annular block to drive the annular rotating component 7 to rotate in the annular groove 232. This causes the inclined surface of the arc-shaped block 71 to slide and abut against the inclined surface at the end of the limit rod, thereby pushing the limit rod to drive the double-layer lip seal ring 27 to move and close relative to each other, thereby clamping it on the stirring shaft 32. The movable top cover 23, which moves downward, drives the double-layer lip seal ring 27 to clean the stirring shaft 32 and the multiple blades 33 after they are stored. In this embodiment, the double-layer lip seal ring 27 is configured as two semi-circular structures. It is slidably limited within the limiting groove 231 by a limiting rod, and further limited by a limiting mounting plate 8 bolted to the movable top cover 23. The output end of the stepper motor 9 drives the gear to rotate one of the arc-shaped blocks 71 with teeth 72. The rotation of the annular rotating part 7 within the annular groove 232 drives the other arc-shaped block 71 to rotate together. This causes the inclined surfaces of the two arc-shaped blocks 71 to slide and abut against the inclined surfaces at the ends of the two limiting rods, pushing the limiting rods to slide within the limiting groove 231. This causes the two semi-circular double-layer lip seal rings 27 to move relative to each other, thus sliding and clamping against the outer wall of the stirring shaft 32. The descending movable top cover 23 then drives the double-layer lip seal rings 27 to clean the stirring shaft 32 and the stored multi-blade impeller 33.

[0034] Furthermore, participate Figure 13 and Figure 16 The two semi-circular double-layer lip seals 27 have sealing grooves and sealing protrusions at their ends, respectively. When the two semi-circular double-layer lip seals 27 move relative to each other until the sealing protrusions engage with the sealing grooves, they form an annular seal. Furthermore, the outer ring of the two semi-circular double-layer lip seals 27 can be fitted with an arc-shaped limiting member, which is connected to a limiting rod, and a spring 6 is connected to the arc-shaped limiting member. The arc-shaped limiting member is made of metal to facilitate fixing the double-layer lip seals 27 within it.

[0035] Furthermore, when the movable top cover 23 of the present invention moves the double-layer lip seal ring 27 to the bottom, it does not detach from the stored multi-blade 33 (i.e., the multi-blade 33 is close to the bottom of the reactor 2 after being stored), so that the movable top cover 23 can completely press out the glue at the bottom of the reactor 2, while the glue at the bottom of the reactor 2 will not overflow from the middle of the movable top cover 23.

[0036] A method for preparing adhesive, using the above-mentioned self-cleaning adhesive preparation apparatus, includes the following steps: S1: Feeding: Different raw materials in the storage tank 11 are transported in batches and precisely to the reactor 2 through the peristaltic pump 12 of the feeding mechanism 1 via the eccentrically distributed feeding pipeline 13; S2: Stirring. After the raw material is fed, close the one-way valve of the feed pipe 13, start the vacuum pump 27 to adjust the gas pressure in the reactor 2 to a suitable range, and at the same time start the stirring mechanism 3. Drive the motor 31 to drive the stirring shaft 32 to rotate, and the blades 33 unfold under the action of centrifugal force to fully stir and mix the raw material in the reactor 2. S3: After stirring is completed, turn off the stirring mechanism 3. After the blades 33 lose centrifugal force, they will automatically sink down under their own gravity. Start the lifting mechanism 4 to drive the movable top cover 23 to press down. The annular sealing ring 24 on the outer ring of the movable top cover 23 and the double-layer lip sealing ring 27 in the middle scrape along the side wall of the reactor 2, the stirring shaft 32 and the blades 33 to remove the residual adhesive on the inner wall, so as to realize the synchronous automatic cleaning of the inner wall of the reactor 2 and the stirring blades 33. S4: Discharge. After cleaning, open valve 22 at the discharge port 21 at the bottom of reactor 2. The finished glue is discharged under its own weight and the pressure generated by the movable top cover 23, completing the preparation of a batch of glue.

[0037] Specifically, during use, the equipment should first be initialized to ensure that all mechanisms are in standby mode. At this time, the lifting mechanism 4 is in the retracted state, which drives the movable top cover 23 of the reactor 2 to rise to the preset high position to avoid affecting the feeding operation; the one-way valves on each feed pipe 13 of the feeding mechanism 1 are in the closed state, and the valve 22 of the bottom outlet 21 of the reactor 2 is also in the closed state to prevent raw material leakage during subsequent feeding. Subsequently, the feeding mechanism 1 is activated for precise feeding. Based on the formulation requirements of the adhesive to be prepared, the peristaltic pumps 12 corresponding to each raw material chamber in the feeding mechanism 1 are started. Adhesive raw materials of different components in the storage tank 11 are transported in batches to the reactor 2 through the corresponding eccentrically distributed feeding pipes 13. Due to the eccentrically distributed design of the feeding pipes 13, the raw materials form a swirling flow along the inner wall after entering the reactor 2, achieving preliminary mixing of the raw materials and laying the foundation for subsequent stirring processes. During the feeding process, the feeding rate and amount of each component raw material can be strictly controlled through the precise regulation of the peristaltic pumps 12, ensuring that the raw material ratio meets the formulation requirements. After all raw materials have been fed, each peristaltic pump 12 is turned off, and the one-way valve on the feeding pipe 13 is simultaneously closed to prevent the raw materials in the reactor 2 from flowing back into the feeding pipe 13, avoiding raw material contamination and pipe blockage.

[0038] After feeding, the process enters the closed mixing stage. First, the vacuum pump 27 is started, and the solenoid valve 26 at the exhaust port 25 on the edge of the movable top cover 23 is opened to evacuate the reactor 2 and remove the air inside. This operation prevents air from mixing into the adhesive during mixing and forming bubbles, while also preventing impurities in the air from affecting the adhesive's performance. When the air pressure inside the reactor 2 reaches the preset suitable reaction range, the solenoid valve 26 and the vacuum pump 27 are closed to complete the sealing of the reactor 2. Then, the locking mechanism 29 is activated to fix the stirring shaft 32 of the mixing mechanism 3, preventing radial shaking of the stirring shaft 32 during mixing and ensuring mixing stability. Next, the drive motor 31 of the mixing mechanism 3 is started, and the drive motor 31 drives the stirring shaft 32 to start rotating. As the rotation speed of the stirring shaft 32 gradually increases, the folding blades 33, which are hinged to the stirring shaft 32, gradually unfold under the action of centrifugal force. Since the folding blades 33 are quarter-cylinder in shape and there are four of them, they can completely cover the cross-section of the reactor 2 when unfolded, which can stir the raw materials in the reactor 2 and ensure that the raw materials of each component are fully mixed. During the stirring process, according to the reaction characteristics of the glue, the control system will control the solenoid valve 26 of the exhaust port 25 to open intermittently, so as to timely discharge the gas generated during the reaction, maintain the stable gas pressure in the reactor 2, and ensure the smooth progress of the reaction.

[0039] After the mixing process is completed, the synchronous cleaning stage begins. First, the drive motor 31 of the mixing mechanism 3 is turned off, and the mixing shaft 32 gradually stops rotating. After the folding blades 33 lose the centrifugal force, they automatically retract under their own structural characteristics, eventually forming an integrated cylindrical structure with the mixing shaft 32. Then, the locking mechanism 29 is opened, and the hydraulic pump of the lifting mechanism 4 is started. The hydraulic pump drives the hydraulic rod to extend, causing the movable top cover 23 to slowly descend. During the descent of the movable top cover 23, the solenoid valve 26 of the exhaust port 25 is opened simultaneously to balance the air pressure inside and outside the reactor 2, ensuring that the movable top cover 23 descends smoothly. During this process, two cleaning actions are completed simultaneously: On the one hand, the silicone rubber annular sealing ring 24 at the bottom of the movable top cover 23 moves down synchronously with the movable top cover 23. Since the outer ring of the silicone rubber annular sealing ring 24 is in an interference fit with the inner wall of the reactor 2, it will tightly scrape the inner wall of the reactor 2 during the downward movement, thoroughly removing the residual adhesive adhering to the inner wall of the reactor 2; On the other hand, the folded blade 33, which forms an integral cylindrical structure with the stirring shaft 32 after shrinking, is pressed down with the movable top cover 23. The fluororubber double-layer lip sealing ring 27 in the central hole of the movable top cover 23 will scrape the surface of the blade 33, removing the residual adhesive adhering to the surface of the blade 33. This achieves synchronous automatic cleaning of the inner wall of the reactor 2 and the stirring blade 33 without manual intervention, greatly improving cleaning efficiency.

[0040] After cleaning, the material discharge stage begins. When the movable top cover 23 is pressed down to the preset low position, the control system opens the valve 22 of the discharge port 21 at the bottom of the reactor 2. At this time, the finished adhesive in the reactor 2 is quickly discharged from the discharge port 21 under the combined action of its own gravity and the pressure generated by the downward pressure of the movable top cover 23, completing the finished product collection. After the finished product is discharged, the movable top cover 23 can be driven up and down 1-2 times again according to actual production needs. Through the secondary scraping of the silicone rubber annular sealing ring 24 and the double-layer lip sealing ring 27, the inner wall of the reactor 2 and the blades 33 are cleaned again, further improving the cleaning effect. After the secondary cleaning is completed, the valve 22 of the discharge port 21 is closed, and the hydraulic rod is controlled to retract, driving the movable top cover 23 to rise to the initial high position, completing the preparation process of one batch of adhesive.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of the present invention without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. A self-cleaning adhesive preparation apparatus, characterized in that, include: The feeding mechanism (1) is connected to multiple eccentrically distributed feed pipes (13). The reactor (2) has an inlet and an outlet (21) and a movable top cover (23). The inlet is connected to the feeding mechanism (1) through the feed pipe (13). A mounting bracket (5) is fixedly installed on its top. The stirring mechanism (3) is located in the middle of the mounting frame (5) and extends through the movable top cover (23) into the reactor (2); its lower part is provided with a blade (33) that can be folded and stored coaxial with the stirring shaft (32). The lifting mechanism (4) is fixedly installed on one or both sides of the mounting frame (5) and connected to the movable top cover (23) to drive the movable top cover (23) to descend inside the reactor (2) to simultaneously clean the stirring mechanism (3) and the inner wall of the reactor (2).

2. The self-cleaning adhesive preparation apparatus according to claim 1, characterized in that, The feeding mechanism (1) includes a storage tank (11) and a peristaltic pump (12), and the peristaltic pump (12) is connected to the storage tank (11) and the reactor (2) through the feed pipeline (13).

3. The self-cleaning adhesive preparation apparatus according to claim 1, characterized in that, The movable top cover (23) is provided with an annular sealing ring (24) on its outer ring, and the annular sealing ring (24) slides in contact with the inner wall of the reactor (2).

4. The self-cleaning adhesive preparation apparatus according to claim 2, characterized in that, The stirring mechanism (3) also includes a drive motor (31), which is fixedly mounted in the middle of the mounting frame (5). The output end of the drive motor (31) is connected to the stirring shaft (32) through a coupling or reducer. The stirring shaft (32) is rotatably connected to the central hole of the mounting frame (5). The blades (33) are multi-bladed fan-shaped rods with an included angle of 90° or 120°. One end of the multiple blades (33) is hinged to the end of the stirring shaft (32), so that after being stored, they are located on the same vertical axis as the stirring shaft (32) to form an integrated cylindrical structure. The descending movable top cover (23) slides to remove the adhesive from the surface of the stored multiple blades (33).

5. The self-cleaning adhesive preparation apparatus according to claim 4, characterized in that, The blade (33) is provided with several receiving grooves (331) along the axial direction. A stirring rod (34) is hinged to one end of the receiving groove (331). A chamfered surface (35) is provided at the hinge point between the receiving groove (331) and the stirring rod (34), so that the angle between the stirring rod (34) and the blade (33) is 45°-70° after the stirring rod (34) descends by centrifugal force.

6. The self-cleaning adhesive preparation apparatus according to claim 4, characterized in that, The lifting mechanism (4) is a hydraulic pump or an electric push rod, and the output end of the hydraulic pump or electric push rod is connected to the end face of the movable top cover (23). Alternatively, the lifting mechanism (4) includes a lifting motor and a lifting screw. The lifting motor is fixedly mounted on the upper part of the reactor (2) by a bracket. The lifting screw is connected to the output end of the lifting motor by a coupling. A screw sleeve is provided on the movable top cover (23), and the screw sleeve is threadedly connected to the lifting screw.

7. The self-cleaning adhesive preparation apparatus according to claim 5 or 6, characterized in that, The movable top cover (23) is provided with an exhaust port (25), which is connected to a vacuum pump (27) via a solenoid valve (26).

8. The self-cleaning adhesive preparation apparatus according to claim 7, characterized in that, The movable top cover (23) has a round hole in the middle, and a double-layer lip seal (27) is provided in the round hole.

9. The self-cleaning adhesive preparation apparatus according to claim 8, characterized in that, The double-layer lip seal ring (27) has two semi-circular structures. The movable top cover (23) has a limiting groove (231) and an annular groove (232) in the middle. The double-layer lip seal ring (27) is provided with limiting rods at both ends. The limiting rods slide into the annular groove (232). A spring (6) is sleeved on the limiting rod, and one end of the spring (6) is connected to the inner wall of the limiting groove (231); An annular rotating component (7) is provided in the annular groove (232). An arc-shaped block (71) is provided at the upper end of the annular rotating component (7). An inclined surface is provided on the arc-shaped block (71) and the end of the limiting rod. A number of teeth (72) are provided on the outer ring of the arc-shaped block (71). A limiting mounting plate (8) is detachably connected to the movable top cover (23) by bolts. A stepper motor (9) is connected to the limiting mounting plate (8). The output end of the stepper motor (9) passes through the limiting mounting plate (8) and is connected to the limiting rod via gears. The teeth (72) mesh to drive the annular block to rotate the annular rotating part (7) in the annular groove (232), so that the inclined surface of the arc block (71) slides and abuts against the inclined surface at the end of the limiting rod, thereby pushing the limiting rod to drive the double-layer lip seal ring (27) to move and close relative to each other, thereby clamping it on the stirring shaft (32), so that the movable top cover (23) moving downward drives the double-layer lip seal ring (27) to clean the stirring shaft (32) and the multiple blades (33) after they are stored.

10. A method for preparing adhesive, using the self-cleaning adhesive preparation apparatus according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1: Feeding: The peristaltic pump (12) of the feeding mechanism (1) delivers different raw materials in the storage tank (11) to the reactor (2) in batches and with precision through the eccentrically distributed feeding pipeline (13); S2: Stirring. After the raw material is fed, close the one-way valve of the feed pipe (13), start the vacuum pump (27) to adjust the gas pressure in the reactor (2) to a suitable range, and start the stirring mechanism (3) at the same time. Drive the motor (31) to drive the stirring shaft (32) to rotate. The blades (33) unfold under the action of centrifugal force to fully stir and mix the raw material in the reactor (2). S3: After stirring is completed, turn off the stirring mechanism (3). After the blades (33) lose centrifugal force, they will automatically sink down due to their own gravity. Start the lifting mechanism (4) to drive the movable top cover (23) to press down. The annular sealing ring (24) on the outer ring of the movable top cover (23) and the double-layer lip sealing ring (27) in the middle scrape along the side wall of the reactor (2), the stirring shaft (32), and the blades (33) to remove the residual adhesive on the inner wall and achieve synchronous automatic cleaning of the inner wall of the reactor (2) and the stirring blades (33). S4: Discharge. After cleaning, open the valve (22) of the discharge port (21) at the bottom of the reactor (2). The finished glue is discharged under its own weight and the pressure generated by the movable top cover (23), thus completing the preparation of a batch of glue.

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