Production device and processing technology for processing polyurethane adhesive

Abstract

The invention relates to the technical field of adhesive production equipment, in particular to a production device and a processing technology for processing a polyurethane adhesive, and the production device for processing the polyurethane adhesive comprises a reaction kettle which is internally provided with a stirring cavity; the mixing assembly comprises a driving mechanism and a stirring mechanism, the driving mechanism is used for driving the stirring mechanism to rotate, and the stirring mechanism is used for stirring the polyurethane adhesive; the material adding mechanism comprises a conveying mechanism, a moving mechanism, an output mechanism and a butt joint mechanism; and the centrifugal scraping assembly is used for scraping the polyurethane adhesive attached to the stirring mechanism. According to the material adding mechanism, the height of the conveying mechanism is adjusted through the moving mechanism, rapid sealing butt joint is achieved in cooperation with the butt joint mechanism, addition of additives at different heights is achieved through the output mechanism, and accurate feeding of the additives is achieved.

Description

A production apparatus and processing technology for processing polyurethane adhesives. Technical Field

[0001] This invention relates to the field of adhesive production equipment technology, specifically to a production apparatus and processing technology for processing polyurethane adhesives. Background Technology

[0002] Polyurethane adhesives are adhesives containing urethane or isocyanate groups in their molecular chains. Polyurethane adhesives are broadly classified into two categories: polyisocyanates and polyurethanes. Because polyisocyanates contain isocyanate and urethane groups in their molecular chains, polyurethane adhesives exhibit high reactivity and polarity. They demonstrate excellent chemical adhesion to substrates containing active hydrogen, such as porous materials like foams, plastics, wood, leather, fabrics, paper, and ceramics, as well as smooth-surfaced materials like metals, glass, rubber, and plastics.

[0003] In existing polyurethane adhesive production technologies, such as the polyurethane adhesive production device disclosed in "CN213376558U", the material addition process is not flexible and precise enough. It is difficult to adjust the addition position of the additives in a timely and accurate manner according to the actual production needs, which can easily lead to uneven mixing and affect the stability of product quality.

[0004] Meanwhile, after running for a long time, polyurethane adhesive tends to adhere to the mixing mechanism, which not only increases the load on the drive mechanism and reduces the mixing efficiency, but also causes material waste and is difficult to clean.

[0005] Furthermore, the lack of effective overall mixing optimization methods makes it difficult for base materials and additives to fully blend, which restricts the improvement of polyurethane adhesive performance. Summary of the Invention

[0006] The purpose of this invention is to provide a production apparatus and processing technology for processing polyurethane adhesives, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: On one hand, it provides a production apparatus for processing polyurethane adhesives, comprising: a reaction vessel, the reaction vessel having a stirring chamber inside; a mixing assembly, the mixing assembly including a driving mechanism and a stirring mechanism, the driving mechanism driving the stirring mechanism to rotate, the stirring mechanism being used to stir the polyurethane adhesive; a material adding mechanism, the material adding mechanism including a conveying mechanism, a moving mechanism, an output mechanism, and a docking mechanism, the conveying mechanism being used to convey additives, the moving mechanism being used to adjust the position of the conveying mechanism, the docking mechanism being used to dock the conveying mechanism and the output mechanism together; and a centrifugal scraping assembly, the centrifugal scraping assembly being used to scrape off the polyurethane adhesive adhering to the stirring mechanism.

[0008] Preferably, the driving mechanism includes a drive motor, which is mounted on the reaction vessel.

[0009] Preferably, the stirring mechanism includes a speed reducer, a stirring shaft body, and stirring rods. The stirring shaft body is connected to the drive motor via the speed reducer, and multiple layers of stirring rods are arranged along the axial direction of the stirring shaft body, with the stirring rods surrounding the stirring shaft body.

[0010] Preferably, the stirring shaft body has a hollow structure, and the conveying mechanism includes a metering pump, a rotary sealing joint, and a telescopic pipe. The rotary sealing joint is used to connect the metering pump and the stirring shaft body to each other, and the metering pump is used to pump the material quantitatively into the telescopic pipe.

[0011] Preferably, the moving mechanism includes a pneumatic push rod, which is disposed inside the stirring shaft body and is used to drive the telescopic tube to extend or retract.

[0012] Preferably, the docking mechanism includes a docking block, a pneumatic telescopic block, a docking opening valve one, and a docking opening valve two. The docking block is disposed at the bottom of the telescopic tube, and the pneumatic telescopic blocks are symmetrically arranged on both sides of the docking block. The pneumatic telescopic block is provided with a docking opening valve one. An output mechanism is disposed inside the stirring rod, and the docking opening valve two is connected to the output mechanism. When the docking opening valve one and the docking opening valve two are docked together, the telescopic tube and the output mechanism are interconnected.

[0013] Preferably, the output mechanism includes an output pipe and a one-way valve. The output pipe is disposed inside the stirring rod, the docking opening valve is connected to the output pipe, and a plurality of one-way valves are disposed along the output pipe and connected to the stirring rod.

[0014] Preferably, the stirring rod has a moving chamber, and the centrifugal scraping assembly includes a movable block, an electromagnet, a moving block, a permanent magnet, a scraper, and a return spring. The movable block is movably connected to the moving chamber and connected to the electromagnet. The moving block is sleeved on the stirring rod and is equipped with a permanent magnet. When the electromagnet is energized, the electromagnet and the permanent magnet attract each other. Scrapers are symmetrically arranged on both sides of the moving block, and the return spring is located in the moving chamber and is used to drive the movable block to return to its original position.

[0015] On the other hand, a processing method is provided for use in the production apparatus for processing polyurethane adhesives, comprising the following steps: A, accurately measuring the base materials required for producing polyurethane adhesives and slowly pouring them into the stirring chamber of a reactor; B, turning on the drive mechanism of the mixing component to start the stirring mechanism rotating in the stirring chamber of the reactor, initially stirring the base materials and allowing the materials to gradually distribute evenly under the stirring action; C, operating the conveying mechanism of the material adding mechanism to convey the required additives according to preset parameters and procedures, ensuring that the additive conveying process is stable and continuous; D, controlling the docking mechanism to dock the conveying mechanism and the output mechanism together, and slowly and evenly adding the additives to the stirring chamber of the reactor through the output mechanism, observing the stirring situation during addition to ensure that the additives can fully contact the base materials; E, when the stirring process is nearing its end or completed, increasing the speed of the drive mechanism and using a centrifugal scraping component to scrape off the polyurethane adhesive adhering to the stirring mechanism.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The material addition mechanism of this application adjusts the height of the conveying mechanism through the moving mechanism, and achieves rapid sealing docking in conjunction with the docking mechanism. The additives are added at different heights through the output mechanism, realizing precise additive feeding and greatly improving production efficiency and formula consistency. The centrifugal scraping component can efficiently recover the adhesive adhering to the agitator, which not only significantly reduces raw material loss and saves costs, but also ensures the mixing uniformity of each batch of materials. At the same time, it simplifies the cleaning process and shortens the batch interval time, providing a reliable basis for high-quality and high-efficiency continuous production. Attached Figure Description

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is an exploded structural schematic diagram of the present invention; Figure 3 is a structural schematic diagram of the metering pump and rotary sealing joint of the present invention; Figure 4 is a structural schematic diagram of the internal structure of the stirring shaft body of the present invention (the stirring shaft body is shown in perspective); Figure 5 is a structural schematic diagram of the connection structure of the telescopic tube and pneumatic push rod of the present invention; Figure 6 is a structural schematic diagram of the position of the docking block, pneumatic telescopic block and docking opening valve of the present invention; Figure 7 is a structural schematic diagram of the position of the stirring rod and moving block of the present invention; Figure 8 is a structural schematic diagram of the internal structure of the stirring rod of the present invention (the stirring rod is shown in perspective); Figure 9 is a structural schematic diagram of the connection structure of the moving block, permanent magnet and scraper of the present invention.

[0018] In the diagram: 1. Reactor, 2. Stirring chamber, 3. Drive motor, 4. Reducer, 5. Stirring shaft body, 6. Stirring rod, 7. Metering pump, 8. Rotary sealing joint, 9. Telescopic pipe, 10. Pneumatic push rod, 11. Connecting block, 12. Pneumatic telescopic block, 13. Connecting opening valve one, 14. Connecting opening valve two, 15. Output pipe, 16. One-way valve, 18. Movable block, 19. Electromagnet, 20. Moving block, 21. Permanent magnet, 22. Scraper, 23. Return spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below 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.

[0020] Please refer to Figures 1-9. The present invention provides a technical solution: a production apparatus for processing polyurethane adhesives, as shown in Figure 1 of the specification, comprising: a reaction vessel 1, wherein a stirring chamber 2 is provided inside the reaction vessel 1.

[0021] The mixing component includes a drive mechanism and a stirring mechanism. The drive mechanism is used to drive the stirring mechanism to rotate, and the stirring mechanism is used to stir the polyurethane adhesive.

[0022] The material adding mechanism includes a conveying mechanism, a moving mechanism, an output mechanism, and a docking mechanism. The conveying mechanism is used to convey the additives, the moving mechanism is used to adjust the position of the conveying mechanism, and the docking mechanism is used to connect the conveying mechanism and the output mechanism.

[0023] Centrifugal scraping assembly, used to scrape off polyurethane adhesive adhering to the stirring mechanism.

[0024] The drive mechanism includes a drive motor 3, which is installed in the reactor 1. The drive motor 3 is used to provide stable and strong power support for the stirring mechanism to ensure the efficient operation of the stirring process.

[0025] The mixing mechanism includes a reducer 4, a mixing shaft body 5, and mixing rods 6. The mixing shaft body 5 is connected to the drive motor 3 via the reducer 4. Multiple layers of mixing rods 6 are arranged along the axial direction of the mixing shaft body 5, surrounding it. The number and arrangement of each layer of mixing rods 6 are designed according to actual mixing requirements. This multi-layered, surrounding arrangement enhances the mixing effect, allowing the polyurethane adhesive to form a more complex flow path within the mixing chamber 2, promoting thorough contact and mixing between different components. The reducer 4 can adjust the rotation speed according to the drive motor 3, ensuring the mixing shaft body 5 rotates at an appropriate speed, preventing adhesive splashing due to excessive speed and ensuring mixing efficiency is not affected by excessively slow speed. The surface of the mixing rods 6 is specially treated to have a smooth texture, reducing the adhesion of polyurethane adhesive to their surface and further ensuring smooth mixing.

[0026] The stirring shaft body 5 has a hollow structure. The conveying mechanism includes a metering pump 7, a rotary sealing joint 8, and a telescopic pipe 9. The rotary sealing joint 8 connects the metering pump 7 and the stirring shaft body 5. The metering pump 7 pumps a metered amount of material into the telescopic pipe 9. One end of the telescopic pipe 9 is connected to the rotary sealing joint 8, and the other end extends into the hollow structure of the stirring shaft body 5. Through the hollow structure of the stirring shaft body 5, additives can be directly conveyed to different heights inside the stirring chamber 2, achieving uniform dispersion of the additives in the polyurethane adhesive. The metering pump 7 can precisely control the amount of additive conveyed, ensuring accurate addition each time and guaranteeing the stability of the polyurethane adhesive product quality. The rotary sealing joint 8 has excellent sealing performance, ensuring a reliable connection between the metering pump 7 and the stirring shaft body 5 while effectively preventing material leakage, avoiding waste and environmental pollution caused by leakage.

[0027] The moving mechanism includes a pneumatic push rod 10, which is located inside the mixing shaft body 5. The pneumatic push rod 10 is used to drive the telescopic tube 9 to extend and retract. The pneumatic push rod 10 has stable extension and retraction performance and can precisely control the extension and retraction length of the telescopic tube 9 according to production needs. When it is necessary to deliver additives to different height positions in the mixing chamber 2, the pneumatic push rod 10 can drive the telescopic tube 9 to accurately reach the designated position, ensuring that the additives can be accurately added to the polyurethane adhesive.

[0028] The docking mechanism includes a docking block 11, a pneumatic telescopic block 12, a docking opening valve one 13, and a docking opening valve two 14. The docking block 11 is located at the bottom of the telescopic tube 9, and pneumatic telescopic blocks 12 are symmetrically arranged on both sides of the docking block 11. The pneumatic telescopic blocks 12 are equipped with docking opening valve one 13. An output mechanism is located on the back of the stirring rod 6, and docking opening valve two 14 is connected to the output mechanism. When docking opening valve one 13 and docking opening valve two 14 are docked together, the telescopic tube 9 and the output mechanism are interconnected. At this time, the additive can flow smoothly into the output mechanism through the telescopic tube 9, and then accurately enter the stirring chamber 2 to mix with the polyurethane adhesive. This ensures that docking opening valve one 13 can accurately dock with docking opening valve two 14. The pneumatic telescopic block 12 can flexibly extend and retract under the action of pneumatic force. When the telescopic tube 9 moves to the docking position, the pneumatic telescopic block 12 extends, so that docking opening valve one 13 and docking opening valve two 14 fit tightly together, achieving a reliable connection.

[0029] The output mechanism includes an output pipe 15 and one-way valves 16. The output pipe 15 is located inside the stirring rod 6, and a connecting valve 14 is connected to the output pipe 15. Several one-way valves 16 are arranged along the output pipe 15 and connected to the surface of the stirring rod 6. Their unique arrangement allows the additive to be evenly distributed in the polyurethane adhesive around the stirring rod 6 as it flows out of the output pipe 15. The one-way valves 16 have good one-way flow performance, allowing the additive to flow only from the output pipe 15 to the stirring chamber 2 without backflow, thus avoiding waste and uneven mixing caused by additive backflow. The output pipe 15 is made of high strength and corrosion resistance, capable of withstanding the pressure and chemical corrosion during the polyurethane adhesive production process, ensuring long-term stable use. The diameter of the output pipe 15 is designed according to the actual amount of additive to be delivered, ensuring rapid delivery of the additive while avoiding additive residue inside the pipe due to excessive diameter. During the stirring process, the output pipe 15 rotates together with the stirring rod 6. The rotation process is smooth and will not affect the delivery of additives.

[0030] The stirring rod 6 has a moving cavity. The centrifugal scraping assembly includes a movable block 18, an electromagnet 19, a moving block 20, a permanent magnet 21, a scraper 22, and a return spring 23. The movable block 18 is movably connected to the moving cavity and is connected to the electromagnet 19. The moving block 20 is sleeved on the stirring rod 6 and is equipped with a permanent magnet 21. When the electromagnet 19 is energized, the electromagnet 19 and the permanent magnet 21 attract each other. Scrapers 22 are symmetrically arranged on both sides of the moving block 20. The return spring 23 is located in the moving cavity and is used to drive the movable block 18 to return to its original position. When the stirring mechanism accelerates, the movable block 18 will move along the moving cavity under the action of centrifugal force. At the same time as the stirring mechanism accelerates, the electromagnet 19 is energized, and the electromagnet 19 generates a magnetic field force that attracts the permanent magnet 21, causing the moving block 20 to move along the surface of the stirring rod 6 under the action of the magnetic field force. The scrapers 22, which are symmetrically arranged on both sides of the moving block 20, move together with it. The scrapers 22 scrape off the polyurethane adhesive attached to the stirring rod 6. During the movement of the moving block 20, the return spring 23 is in a stretched state. When the stirring mechanism stops rotating, the return spring 23 drives the moving block 18 to reset by its own elastic force, thereby returning the moving block 20 and the scrapers 22 to their initial positions, ready for the next scraping operation.

[0031] Working Principle: During use, the drive motor 3 in the drive mechanism starts, which drives the main body of the stirring shaft in the stirring mechanism to rotate. The multi-layer stirring rods 6 on the main body of the stirring shaft rotate accordingly, stirring the polyurethane adhesive in the stirring chamber 2, so that the polyurethane raw materials of different components are initially mixed. During the stirring process, when additives need to be added, the material addition mechanism starts to work. The metering pump 7 of the conveying mechanism pumps the additive into the telescopic tube 9 in a metered manner. The pneumatic push rod 10 in the moving mechanism drives the telescopic tube 9 to extend and retract within the hollow structure of the stirring shaft body 5 according to preset parameters, moving the telescopic tube 9 to a suitable height position. By adjusting the position of the pneumatic telescopic block 12, the pneumatic telescopic block 12 extends, allowing the docking opening valve 13 to be tightly docked with the docking opening valve 14 on the output mechanism on the back of the stirring rod 6. The telescopic tube 9 and the output mechanism are interconnected. The additive flows into the output mechanism through the telescopic tube 9, and then is evenly distributed in the polyurethane adhesive around the stirring rod 6 through the one-way valve 16 on the output tube 15, realizing the precise addition and uniform dispersion of the additive.

[0032] When cleaning is required, set the stirring speed of the stirring mechanism to accelerate its rotation (the electromagnet 19 is always energized during use). The electromagnet 19 and the permanent magnet 21 on the moving block 20 generate a magnetic field force that attracts each other, causing the moving block 20 to move along the surface of the stirring rod 6. The scrapers 22 on both sides of the moving block 20 scrape off the polyurethane adhesive attached to the stirring rod 6.

[0033] 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 production apparatus for processing polyurethane adhesives, characterized in that, include: The reactor includes a stirring chamber; a mixing assembly comprising a drive mechanism and a stirring mechanism, wherein the drive mechanism drives the stirring mechanism to rotate and the stirring mechanism stirs the polyurethane adhesive; a material adding mechanism comprising a conveying mechanism, a moving mechanism, an output mechanism, and a docking mechanism, wherein the conveying mechanism conveys the additive, the moving mechanism adjusts the position of the conveying mechanism, and the docking mechanism docks the conveying mechanism and the output mechanism together; and a centrifugal scraping assembly for scraping off the polyurethane adhesive adhering to the stirring mechanism.

2. The production apparatus for processing polyurethane adhesives according to claim 1, characterized in that: The driving mechanism includes a drive motor, which is mounted on the reaction vessel.

3. The production apparatus for processing polyurethane adhesives according to claim 2, characterized in that: The stirring mechanism includes a speed reducer, a stirring shaft body, and stirring rods. The stirring shaft body is connected to the drive motor through the speed reducer. Multiple layers of stirring rods are arranged along the axial direction of the stirring shaft body, and the stirring rods are arranged around the stirring shaft body.

4. The production apparatus for processing polyurethane adhesives according to claim 3, characterized in that: The stirring shaft body has a hollow structure. The conveying mechanism includes a metering pump, a rotary sealing joint, and a telescopic pipe. The rotary sealing joint is used to connect the metering pump and the stirring shaft body to each other. The metering pump is used to pump the material quantitatively into the telescopic pipe.

5. The production apparatus for processing polyurethane adhesives according to claim 4, characterized in that: The moving mechanism includes a pneumatic push rod, which is disposed inside the stirring shaft body and is used to drive the telescopic tube to extend and retract.

6. The production apparatus for processing polyurethane adhesives according to claim 4, characterized in that: The docking mechanism includes a docking block, a pneumatic telescopic block, a docking opening valve one, and a docking opening valve two. The docking block is located at the bottom of the telescopic tube, and the pneumatic telescopic blocks are symmetrically arranged on both sides of the docking block. The pneumatic telescopic blocks are equipped with docking opening valve one. An output mechanism is provided inside the stirring rod, and docking opening valve two is connected to the output mechanism. When docking opening valve one and docking opening valve two are docked together, the telescopic tube and the output mechanism are interconnected.

7. The production apparatus for processing polyurethane adhesives according to claim 6, characterized in that: The output mechanism includes an output pipe and a one-way valve. The output pipe is located inside the stirring rod. The docking opening valve is connected to the output pipe. Several one-way valves are arranged along the output pipe and are connected to the stirring rod.

8. The production apparatus for processing polyurethane adhesives according to claim 3, characterized in that: The stirring rod has a moving chamber. The centrifugal scraping assembly includes a movable block, an electromagnet, a moving block, a permanent magnet, a scraper, and a return spring. The movable block is movably connected to the moving chamber and is connected to the electromagnet. The moving block is sleeved on the stirring rod and is equipped with a permanent magnet. When the electromagnet is energized, the electromagnet and the permanent magnet attract each other. Scrapers are symmetrically arranged on both sides of the moving block. The return spring is located in the moving chamber and is used to drive the movable block to return to its original position.

9. A processing method, based on the production apparatus for processing polyurethane adhesives according to any one of claims 1 to 8, characterized in that, The process includes the following steps: A) Accurately measure the base materials required for producing polyurethane adhesive and slowly pour them into the stirring chamber of the reactor; B) Turn on the drive mechanism of the mixing component to start the stirring mechanism rotating in the stirring chamber of the reactor, initially stirring the base materials and allowing them to gradually distribute evenly under the stirring action; C) Operate the conveying mechanism of the material adding mechanism to convey the required additives according to the preset parameters and process, ensuring that the additive conveying process is stable and continuous; D) Control the docking mechanism to dock the conveying mechanism and the output mechanism, and slowly and evenly add the additives to the stirring chamber of the reactor through the output mechanism, observing the stirring situation during addition to ensure that the additives can fully contact the base materials; E) Near the end or after the stirring process is completed, increase the speed of the drive mechanism and use the centrifugal scraping component to scrape off the polyurethane adhesive adhering to the stirring mechanism.

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