Intelligent degradable pressure-sensitive adhesive preparation device and method

Abstract

The present invention relates to the technical field related to pressure-sensitive adhesive processing, and discloses an intelligent degradable pressure-sensitive adhesive preparation device and method. In order to solve the problems of large temperature difference and uneven heating of the material caused by the pressure-sensitive adhesive raw material being heated only by an external tank body in the traditional preparation process, a hollow heating jacket is installed inside the reactor body. The pressure-sensitive adhesive raw material inside the reactor body can be heated on both sides by using the inner and outer sides of the heating jacket, thereby increasing the heated area of ​​the material. In combination with an auger, the raw material is made to circulate up and down through the interior of the heating jacket, so that the material is circulated and heated while reducing heating dead corners, ultimately achieving the effect of up and down circulation stirring of the material and uniform heating inside and outside.

Description

Technical Field

[0001] The present invention relates to the technical field related to pressure-sensitive adhesive processing, and in particular to an intelligent degradable pressure-sensitive adhesive preparation device and method. Background Art

[0002] Degradable pressure-sensitive adhesives (PSA) are adhesives that rapidly develop adhesive properties under pressure and can be decomposed into harmless substances such as carbon dioxide and water by microorganisms in the natural environment. Compared to traditional oil-based PSAs, PSAs have a lower environmental impact during production and use.

[0003] In the preparation process of degradable pressure-sensitive adhesive, the temperature control and uniformity of the reactor directly affect the product performance. After searching, it can be known that the announcement number CN207887059U discloses a preparation device for degradable pressure-sensitive adhesive, including a heating pipe arranged inside the tank body, and the heating pipe and the tank body are connected by a sleeve-fitting method; the bottom plate is arranged at the lower part of the tank body, and the bottom plate and the tank body are connected by a bolt fixing method; the discharge port is arranged at the bottom of the tank body, and the discharge port and the tank body are an integrated structure; the discharger is arranged at the bottom of the discharge port, and the discharger and the discharge port are connected by a bolt fixing method; the fixing frame is arranged outside the tank body, and the fixing frame is connected to the tank body by welding; the top cover is arranged on the upper part of the tank body, and the top cover and the tank body are connected by a bolt fixing method; the spiral-shaped electric heating pipe is arranged to make the heating area inside the tank body uniform, thereby improving the preparation effect. The advantage of using a pressure gauge in conjunction with an air vent with an electromagnetic one-way valve installed inside is to facilitate real-time monitoring of the internal pressure of the tank body and control of the air pressure. A scraper is provided, which has the advantage of stirring the tank body and scraping off the raw materials adhering to the inner wall of the tank body at the same time.

[0004] This indicates that the current pressure-sensitive adhesive (PSA) production process often involves heating the material by installing a heating assembly on the outside of the tank. While this method can heat the material in the reactor, since heat transfer occurs only through contact with the tank surface, significant temperature gradients often exist within the material (e.g., local temperature differences may reach or exceed 10°C). To achieve uniform heating of the material, prolonged stirring is required. This places stringent demands on adequate stirring, as any dead zone in the stirring process will prevent the temperature in that area from reaching the required temperature for the PSA polycondensation reaction, potentially leading to problems such as molecular chain breakage or insufficient cross-linking, seriously impacting product quality. Summary of the Invention

[0005] This invention proposes an intelligent device and method for preparing biodegradable pressure-sensitive adhesives. This device incorporates a hollow heating element and an auger conveying mechanism, achieving vertical circulation and stirring of the material within the reactor, while also ensuring uniform heating inside and outside the reactor. This design effectively addresses the large temperature differences and uneven heating that occur in traditional preparation processes, which rely solely on external tank heating.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: an intelligent degradable pressure-sensitive adhesive preparation device, comprising a reactor body, a reactor cover with a sight glass cover installed on the top of the reactor body, a discharge valve body installed on the bottom, and also comprising: a heating jacket, arranged in the inner cavity of the reactor body, for synchronously heating the raw materials on both sides of the inside and outside of the reaction cavity; a power assembly, the output shaft drives the auger to rotate inside the heating jacket through the intermediate shaft, and the auger realizes the up and down circulation of the raw materials in the reaction cavity; a dispersion seat, movably sleeved on the outside of the intermediate shaft and the bottom of the dispersion seat is abutted against the top of the heating jacket through a reset spring; when the auger pushes the raw materials up, the raw materials at the top of the central cavity of the jacket are sprayed in an umbrella shape through the bottom of the dispersion seat, and the sprayed raw materials are contacted and mixed with the high-temperature airflow at the top of the reaction cavity.

[0007] Furthermore, a heat medium input pipe and a heat medium output pipe are provided at the bottom of the reactor body, and a winding groove is provided inside the heating jacket. The heat medium input pipe is connected to the winding groove inlet, and the heat medium output pipe extends into the winding groove outlet, forming a circulating heating path for the high-temperature medium oil.

[0008] Furthermore, the inner cavity of the reactor body is set as the reaction cavity, the inner area of ​​the heating jacket is set as the jacket central cavity, and the upper and lower ends of the jacket central cavity are respectively connected to the reaction cavity.

[0009] Furthermore, a plurality of filter holes are provided at the bottom of the heating jacket, and the aperture of the filter holes is configured to allow raw materials of a predetermined particle size to enter the central cavity of the jacket.

[0010] Furthermore, the outer wall of the reactor body is provided with an insulation outer cavity surrounding the reaction cavity, and the insulation outer cavity is connected to the top of the reaction cavity. The hot air generated by the heating jacket is introduced into the insulation outer cavity through the top of the reaction cavity.

[0011] Furthermore, the intermediate shaft drives the dispersion seat to rotate in the reverse direction at a low speed through the reduction gear assembly, and the intermediate shaft is fixed with an axial flow fan blade located in the inner cavity at the top of the dispersion seat; the bottom of the dispersion seat is connected to a stirring tube, and the stirring tube passes through a connecting ring sleeve movably installed on the inner side of the reactor body, and the airflow generated by the axial flow fan blade is introduced into the insulation outer cavity through the stirring tube; a return air pipe is provided in the heating jacket, the bottom of the return air pipe is connected to the insulation outer cavity, and the top is provided with a one-way air valve for one-way flow to the reaction inner cavity.

[0012] Furthermore, the reduction gear assembly includes: a driving gear fixed to the intermediate shaft; an intermediate gear installed on the inner side of the kettle cover and meshing with the driving gear; and an outer gear ring arranged around the driving gear and the intermediate gear and meshing with the intermediate gear.

[0013] Furthermore, the stirring tube has any of the following structures: a U-shaped tube, the outer wall of which is in sliding contact with the heating jacket and the inner wall of the reaction cavity; a wavy tube, the curved surface of the tube body forms stirring interference with the material in the reaction cavity.

[0014] Furthermore, an air supply pipe is fixed on the outside of the reactor body, the air supply pipe is connected to the heat-insulating outer cavity and is provided with a one-way air valve for supplying gas to the heat-insulating outer cavity.

[0015] A method for using an intelligent degradable pressure-sensitive adhesive preparation device comprises the following steps:

[0016] S1. Pour the raw materials for preparing the pressure-sensitive adhesive from the sight glass cover into the reaction cavity, and then seal the sight glass cover.

[0017] S2. Heat the external medium oil and pump the heated medium oil through the heat medium input pipe, so that the high-temperature medium oil passes through the serpentine groove and is discharged from the heat medium output pipe, thereby synchronously heating the inner and outer sides of the heating jacket.

[0018] S3. Control the power assembly to rotate forward, and use the intermediate shaft to drive the auger to rotate forward synchronously, so that the pressure-sensitive adhesive raw material at the bottom of the reaction chamber is turned upward through the central cavity of the jacket, realizing the upward and downward circulation of the raw material in the reaction chamber. In this process, the upward and downward flowing materials are all heated by the heating jacket, so that all the materials in the reaction chamber are heated relatively evenly.

[0019] S4. After the raw materials are stirred, open the discharge valve fixed at the bottom of the reactor.

[0020] S5. Use the power assembly to drive the intermediate shaft to rotate in the opposite direction, driving the auger to rotate in the opposite direction, and quickly pouring the prepared raw materials out of the discharge valve body.

[0021] The present invention has the following beneficial effects:

[0022] The present invention provides an intelligent degradable pressure-sensitive adhesive preparation device and method thereof, in which a hollow heating jacket is installed inside the reactor body. The heating jacket can make full use of its inner and outer surfaces to efficiently and evenly heat the pressure-sensitive adhesive raw materials inside the reactor body on both sides. Through such a design, the heated area of ​​the material can be significantly increased, making the heat transfer more rapid and uniform. The device is also combined with an auger conveying mechanism to enable the raw materials to circulate up and down from the inside of the heating jacket. This circulating flow process not only promotes the full mixing of the materials, but also ensures that while the materials are circulated and heated, it effectively reduces heating dead corners and avoids local overheating or insufficient heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0024] The present invention can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0025] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall internal three-dimensional structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the internal planar cross-sectional structure of the present invention;

[0028] Figure 4 A schematic diagram of the position and three-dimensional structure of the dispersion seat and the acceleration gear assembly in the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional cross-sectional structure of the dispersion seat in the present invention;

[0030] Figure 6 This is a schematic diagram of the entirety of the present invention after removing the reactor body and reactor cover;

[0031] Figure 7 This is a schematic diagram of the internal three-dimensional structure of the heating jacket in the present invention;

[0032] Figure 8 This is a schematic diagram of the process of placing the pressure-sensitive adhesive raw material in the present invention;

[0033] Figure 9 Schematic diagram of the flow of materials and air during the stirring process of the pressure-sensitive adhesive raw material in the present invention;

[0034] Figure 10 This is a schematic diagram of the state of the pressure-sensitive adhesive raw material being discharged after stirring in the present invention.

[0035] In the figure: 1. Reactor body; 1001. Reactor inner cavity; 1002. Insulated outer cavity; 2. Reactor cover; 200. Sightglass cover; 3. Power assembly; 4. Discharge valve body; 5. Air supply pipe; 6. Reduction gear assembly; 600. Drive gear; 601. Intermediate gear; 602. Outer ring gear; 7. Dispersion seat; 701. Return spring; 8. Axial flow fan blade; 9. Intermediate shaft; 10. Connecting ring sleeve; 11. Heating jacket; 110. Winding groove; 111. Filter hole; 112. Jacket center cavity; 12. Auger; 13. Stirring tube; 14. Heat medium input pipe; 140. Heat medium output pipe; 15. Return air pipe. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] For example 1, please refer to Figure 1 It can be seen that the reactor body 1 can be fixed in a suitable position using the mounting holes provided on the side, thereby realizing the production and preparation of the degradable pressure-sensitive adhesive. Similar to the traditional pressure-sensitive adhesive reactor, the top opening of the reactor body 1 is fastened with a reactor cover 2 using a flange. The lid 2 covers the top opening of the reactor body 1, ensuring that the inner cavity of the reactor body 1 is in a relatively sealed state. On one side of the lid 2 is a sight glass cover 200 fastened with bolts. Generally speaking, the middle part of the surface of the sight glass cover 200 is made of transparent material. When the sight glass cover 200 is removed, the material for preparing the degradable pressure-sensitive adhesive can be poured into the inner cavity of the reactor body 1; at the same time, when the sight glass cover 200 is closed and tightened, the sight glass cover 200 can be used to intuitively understand the state of the material in the inner cavity of the reactor body 1. The surface of the lid 2 is also provided with sensors for detecting the pressure and temperature of the inner cavity of the reactor body 1, as well as a pressure relief valve to prevent abnormally high pressure from being generated in the inner cavity of the reactor body 1. Such accessories for detection and safety are also present in this device. These components are commonly used and well-known means in the art, and will not be described in detail.

[0038] The reactor body 1 mentioned in the present application is different from the prior art in that the current prior art mainly utilizes a heating component wrapped around the outer side of the reactor body 1, and realizes heating of the reactor body 1 by means of electricity, steam or oil heating. However, in actual applications, since there is a certain distance between the outer side of the reactor body 1 and its center, as the volume of the reactor body 1 increases, the distance will further increase. Only using external heating will cause a large temperature difference between the center of the raw materials in the inner cavity of the reactor body 1 and the outside. Although the temperature difference problem between the inside and the outside can be reduced by using methods such as stirring, this has more stringent requirements for stirring. Once a dead angle appears in the stirring, it will cause the temperature in some areas to be too high / too low, thereby affecting the quality of the finished pressure-sensitive adhesive. Based on this, the present application proposes a preparation device for degradable pressure-sensitive adhesive, with reference to Figure 2 and Figure 3 It can be seen that a heating jacket 11 coaxially arranged with the bottom of the inner cavity of the reactor body 1 is welded thereto. Figure 7 As shown, the heating jacket 11 is a cylindrical tube with a through middle. When the raw materials are distributed on the inside and outside of the heating jacket 11, the heating jacket 11 can heat the raw materials on both sides simultaneously. In this process, the heating jacket 11 placed in the middle of the inner cavity of the reactor body 1 can relatively increase its heating range, thereby reducing the problem of large temperature differences caused by the different lengths of the materials from the heat source. For the input of the heat source in this application, it is preferred to use heated medium oil, but other heating methods are not excluded. Combined Figure 3 and Figure 7 It can be seen that a heat medium input pipe 14 is fixedly installed at the bottom of the reactor body 1. The heat medium input pipe 14 passes into the serpentine groove 110 set inside the heating jacket 11. The serpentine groove 110 is mainly in a spiral form, but other forms that can extend the path are not excluded. A heat medium output pipe 140 is also provided on one side of the heat medium input pipe 14, which is fixed to the bottom of the reactor body 1. One end of the heat medium output pipe 140 extends to the top of the serpentine groove 110. When the heated medium oil is input into the heat medium input pipe 14 by pumping or other methods, the high-temperature medium will increase the temperature of the heating jacket 11 after passing through the serpentine groove 110, thereby heating the pressure-sensitive adhesive material inside and outside the heating jacket 11. Finally, the medium oil will be discharged from the heat medium output pipe 140. Generally speaking, the medium oil discharged from the heat medium output pipe 140 can be re-input from the heat medium input pipe 14 after being heated, realizing the circulation heating of the medium oil.

[0039] In order to better understand this application, Figure 3 It can be seen that the inner cavity area of ​​the reactor body 1 is set as the reaction cavity 1001, which is mainly used to place the pressure-sensitive adhesive raw materials to be processed, and the inner area of ​​the heating jacket 11 is set as the jacket central cavity 112. The upper and lower ends of the jacket central cavity 112 are connected to the reaction cavity 1001. Figure 2 and Figure 3As shown, the power assembly 3 is fixedly mounted on the top of the reactor cover 2. The output shaft of the power assembly 3 is fixedly mounted with an intermediate shaft 9 that extends into the reaction chamber 1001 and is aligned with the central axis of the heating jacket 11. The intermediate shaft 9 needs to be sealed when passing through the reactor cover 2 to prevent air leakage. The bottom of the intermediate shaft 9 is fixed to an auger 12 using a flange. The auger 12 is located in the central cavity 112 of the jacket. The outer side of the auger 12 is generally provided with a rubber strip that is slidably connected to the inner wall of the heating jacket 11 to prevent rigid contact friction between the two.

[0040] In actual application, such as Figure 8 As shown, after the raw materials for preparing the pressure-sensitive adhesive are poured from the sight glass cover 200 into the reaction cavity 1001, the sight glass cover 200 is sealed and closed. After being heated, the external medium oil is pumped from the heat medium input pipe 14. The high-temperature medium oil is discharged from the heat medium output pipe 140 after passing through the winding groove 110, and the inner and outer sides of the heating jacket 11 are heated synchronously. At the same time, the power assembly 3 is controlled to rotate forward, and the intermediate shaft 9 is used to synchronously rotate the auger 12 forward. The forward-rotating auger 12 will turn the pressure-sensitive adhesive raw materials at the bottom of the reaction cavity 1001 upward through the central cavity 112 of the jacket, so that the raw materials in the reaction cavity 1001 circulate up and down. In this process, the materials flowing up and down are all heated by the heating jacket 11, and eventually all the materials in the reaction cavity 1001 are heated relatively evenly.

[0041] Finally, when the raw materials are stirred, the discharge valve body 4 fixed at the bottom of the reactor body 1 is opened to discharge the materials in the reaction cavity 1001. Figure 3 It can be clearly seen that the bottom part of the auger 12 extends into the interior of the discharge valve body 4. When the discharge valve body 4 is opened, the power assembly 3 is used to drive the intermediate shaft 9 to rotate in the opposite direction, and the auger 12 can be used to rotate in the opposite direction to quickly pour out the prepared raw materials from the discharge valve body 4.

[0042] During the actual production process, we found that the raw materials poured into the inner cavity of the reactor body 1 were not filled to the brim. The raw materials generally occupied about 3 / 4 of the inner cavity of the reactor body 1, but the height of the heating jacket 11 was generally higher than the surface of the raw materials. At this time, the reaction cavity 1001 located above the surface of the raw materials would also be heated by the heating jacket 11. Based on this, we designed a more effective way to heat the raw materials, such as Figure 2 、 Figure 3 and Figure 5As shown, the outer side of the intermediate shaft 9 is movably sleeved with a dispersion seat 7 located above the heating jacket 11, and the bottom of the dispersion seat 7 is conical. A reset spring 701 is connected between the dispersion seat 7 and the intermediate shaft 9. Under normal conditions, the dispersion seat 7 is pushed downward by the elastic force of the reset spring 701 until the bottom of the dispersion seat 7 is attached to the top of the conical groove corresponding to the top of the heating jacket 11. It should be noted that an annular gasket is provided on the conical groove at the top of the heating jacket 11, which can not only achieve sealing between the dispersion seat 7 and the heating jacket 11 after being attached, so that the top of the jacket central cavity 112 and the reaction cavity 1001 are relatively separated; it can also provide buffering by squeezing the annular gasket when the dispersion seat 7 moves downward rapidly. With the addition of the dispersion seat 7, when the power assembly 3 rotates the auger 12 at high speed through the intermediate shaft 9, the auger 12 can quickly push the raw materials in the jacket center cavity 112 upward. When the material reaches the dispersion seat 7 and overcomes the elastic force of the return spring 701, the dispersion seat 7 moves upward and increases the gap between the heating jacket 11 and the dispersion seat 7. The dispersion seat 7 is away from the annular gasket at the top of the heating jacket 11, which causes the two to no longer be sealed. The raw materials at the top of the jacket center cavity 112 are ejected from the bottom of the dispersion seat 7 in an umbrella shape into the reaction cavity 1001. On the one hand, the raw materials dispersed in the umbrella shape can be heated by the high-temperature airflow at the top of the reaction cavity 1001; on the other hand, the dispersed raw materials will make their mixing efficiency higher.

[0043] In order to remove particles and suspended solids that may affect product performance and make product performance more stable and reliable, Figure 2 、 Figure 3 and Figure 6 As can be seen, the bottom of the heating jacket 11 is provided with a plurality of filter holes 111. The filter holes 111 are preferably truncated cone-shaped (with smaller holes at the ends of the reaction chamber 1001 and larger holes in the jacket's central chamber 112). This arrangement ensures that during the stirring process, as the auger 12 rotates forward, the pressure below the auger 12 and at the bottom of the jacket's central chamber 112 is relatively reduced, allowing the raw materials in the reaction chamber 1001 to flow through the filter holes 111 due to gravity flow and the adsorption force generated at the bottom of the jacket's central chamber 112. Raw materials that meet the requirements enter the jacket's central chamber 112, where they are stirred and transported upward until they pass through the dispersion seat 7 and are dispersed and remixed outward. Impurities that do not meet the particle size requirements will remain in the reaction chamber 1001. When the discharge valve body 4 is subsequently opened and the raw materials are transported outward, the filtration of the filter holes 111 ensures that the raw materials discharged outward are free of impurities (incompletely reacted raw materials, catalyst residues, reaction byproducts, etc.).

[0044] Example 2 is a further improvement on Example 1. Although the heating jacket 11 can fully heat the raw materials in the reaction chamber 1001 in Example 1, the outer wall of the reactor body 1 is still exposed to the external environment, which causes the heat to be dissipated from the outside of the reactor body 1. Even if the outside of the reactor body 1 is provided with a heat-insulating material, such as thermal insulation, the heating jacket 11 heated in the middle may still not be able to keep the temperature outside the reactor body 1 relatively equal to that in the middle. In order to reduce the temperature difference between the inside and outside of the reactor body 1 and to ensure that the raw materials do not stick to the inner wall of the reaction chamber 1001, causing the temperature to dissipate too quickly, please refer to Figure 2 and Figure 3 It can be seen that an insulating outer cavity 1002 is provided in the outer wall of the reactor body 1 and is located outside the reaction cavity 1001, and the insulating outer cavity 1002 is interconnected with the top of the reaction cavity 1001. As can be seen from the content of Example 1, when the heating jacket 11 is heated, the air in the reaction cavity 1001 and above the surface of the raw material is heated synchronously. The present application introduces the heated air synchronously into the insulating outer cavity 1002, thereby achieving insulation of the reaction cavity 1001. Since the temperature between the reaction cavity 1001 and the insulating outer cavity 1002 is heated by the heating jacket 11, the difference between the two will be shortened as much as possible (optimally until the temperatures of the two are consistent). At this time, by inserting an insulating material as a whole on the outer wall of the reactor body 1, the temperature loss can be further reduced.

[0045] On this basis, in order to transport the high temperature air at the top of the reaction chamber 1001 to the heat preservation outer chamber 1002 as much as possible, combined with Figure 3 、 Figure 4 and Figure 6 It can be seen that when the intermediate shaft 9 rotates, the dispersion seat 7 is rotated in the opposite direction at a low speed through the reduction gear assembly 6. A driving gear 600 is fixedly installed on the outside of the intermediate shaft 9, and an intermediate gear 601 meshing with the outer teeth of the driving gear 600 is installed on the top of the inner side of the kettle cover 2. The position of the intermediate gear 601 is relatively fixed, which ensures that the intermediate gear 601 can only transmit the rotational force of the driving gear 600 outward. An outer gear ring 602 is installed on the top of the inner side of the kettle cover 2 and is located on the outer side of the driving gear 600 and the intermediate gear 601. The outer gear ring 602 and the intermediate gear 601 are meshed, which means that the number of inner teeth of the outer gear ring 602 is greater than the number of outer teeth of the driving gear 600 / intermediate gear 601, that is, when the driving gear 600 realizes the rotation of the outer gear ring 602 through the intermediate gear 601, the outer gear ring 602 rotates at a low speed and in the opposite direction of rotation to the driving gear 600. Figure 3 and Figure 6It can be clearly seen that a plurality of guide rods are provided at the bottom of the outer gear ring 602, and the top of the dispersion seat 7 is provided with an "L"-shaped bracket and a movable set between the guide rods, which not only enables the dispersion seat 7 to rotate at a low speed following the outer gear ring 602, but also enables the dispersion seat 7 to reciprocate up and down along the guide rods within a certain range. Figure 3-Figure 5 It can be seen that the outer wall of the intermediate shaft 9 is fixed with an axial flow fan blade 8 located in the inner cavity of the top of the dispersion seat 7. When the intermediate shaft 9 drives the axial flow fan blade 8 to rotate forward, the airflow flows from top to bottom; conversely, when the axial flow fan blade 8 rotates in the reverse direction, the airflow flows from top to bottom. Figure 3 and Figure 5 It can be seen that a stirring tube 13 is fixedly installed at the bottom of the dispersion seat 7, and the stirring tube 13 is connected to the inner cavity of the dispersion seat 7. A connecting ring 10 for isolating the reaction cavity 1001 and the heat-insulating outer cavity 1002 is movably installed on the inner side of the reactor body 1. The connecting ring 10 can only rotate along the central axis of the reactor body 1. Correspondingly, the other end of the stirring tube 13 passes through the bottom of the connecting ring 10 and is sealed to ensure that when the stirring tube 13 moves up and down along the axis of the connecting ring 10, the two can still be relatively sealed. When the power assembly 3 drives the intermediate shaft 9 to rotate forward, the axial flow blades 8 and the auger 12 rotate forward synchronously. The rotation of the auger 12 can turn the raw materials at the bottom of the reaction cavity 1001 upward through the central cavity 112 of the jacket, realizing the dispersion of the raw materials and the upward and downward circulation as described in Example 1. When the axial flow blades 8 rotate rapidly in the forward direction, the high-temperature airflow at the top of the reaction cavity 1001 will be input into the inner cavity of the dispersion seat 7, as shown in FIG. Figure 9 The airflow passing through the stirring tube 13 will directly pass through the connecting ring 10 and enter the heat-insulating outer cavity 1002.

[0046] In order to avoid the air flow pressure in the heat preservation outer cavity 1002 from increasing continuously, Figure 3 and Figure 7 It can be seen that a return air pipe 15 is fixedly installed inside the heating jacket 11. The bottom of the return air pipe 15 is connected to the heat-insulating outer cavity 1002, and the top extends from the top of the outer side of the heating jacket 11 (its end is aligned with the outer wall of the heating jacket 11). When the airflow pressure in the heat-insulating outer cavity 1002 increases, the airflow will be discharged directly from the return air pipe 15 to the reaction cavity 1001. At this time, the airflow in the reaction cavity 1001 and the heat-insulating outer cavity 1002 can circulate. In addition, when the airflow in the heat-insulating outer cavity 1002 passes through the return air pipe 15, the return air pipe 15 will be heated by the medium oil in the winding groove 110, thereby ensuring that the hot air flow blown out by the return air pipe 15 acts on the reaction cavity 1001. Figure 3 and Figure 9As can be seen in the figure, the raw materials dispersed by the dispersion seat 7 are located above the top of the return air pipe 15. When the high-temperature airflow in the return air pipe 15 is blown outward, it acts on the dispersed raw materials, further enhancing the heating of the dispersed raw materials. In actual arrangement, there can be multiple return air pipes 15, and the multiple return air pipes 15 are arranged in a circular shape with equal angles around the central axis of the reactor body 1. In addition, in order to prevent the raw materials in the reaction cavity 1001 from flowing back through the return air pipe 15, a one-way air valve is generally fixed on the top of the return air pipe 15 to achieve one-way delivery of the airflow in the return air pipe 15 to the reaction cavity 1001.

[0047] Not only that, from Figure 3-Figure 5 It can be seen that the stirring tube 13 has a variety of shapes. This case takes two as examples, but other shapes that can be used for stirring are not excluded. The first is that the stirring tube 13 is in a "U" shape, and the outer side of the stirring tube 13 is slidably connected to the outer wall of the heating jacket 11 and the inner wall of the reaction chamber 1001. As mentioned above, when the intermediate shaft 9 rotates in the forward direction at high speed, the reduction gear assembly 6 is used to reduce the speed to achieve the low-speed reverse rotation of the dispersion seat 7. When the dispersion seat 7 drives the stirring tube 13 to rotate, it can scrape its inner wall, thereby avoiding the problem that the material adheres to the inner wall of the heating jacket 11 / reaction chamber 1001 and the temperature cannot be transferred to the outside. The second is that the shape of the stirring tube 13 is wavy, which enables the dispersion seat 7 to drive the stirring tube 13 to move in the reaction chamber 1001, thereby stirring the material in the reaction chamber 1001. Furthermore, since the stirring tube 13 is a metal tube, when the high-temperature airflow passes through the stirring tube 13, it also heats the raw materials in the reaction chamber 1001, further heating the area through which the stirring tube 13 passes. It should be noted that the two aforementioned shapes of stirring tube 13 can be used alone or in combination.

[0048] The third embodiment is a further improvement on the basis of the second embodiment. In order to facilitate the discharge of the material in the reaction cavity 1001, please refer to Figure 3 As can be seen, an air supply pipe 5 is welded to the outside of the reactor body 1 and communicates with the insulated outer chamber 1002. A one-way valve is installed in the air supply pipe 5 to ensure unidirectional airflow from the outside to the insulated outer chamber 1002. In actual use, the air supply pipe 5 is primarily connected to an external air purifier via a flange. The air purifier can deliver pure air to the insulated outer chamber 1002, ensuring that the pure airflow input from the insulated outer chamber 1002 to the reaction chamber 1001 does not contaminate the raw materials in the reaction chamber 1001.

[0049] In the actual application of this embodiment 3, refer to Figure 3 and Figure 8As shown in the feeding diagram, the operator opens the sight glass cover 200, pours the raw materials required for preparing the pressure-sensitive adhesive into the reaction cavity 1001, and then seals the sight glass cover 200 to complete the feeding of the raw materials.

[0050] The heated medium oil is pumped from the heat medium input pipe 14 into the serpentine groove 110, and the high temperature medium oil is discharged from the heat medium output pipe 140 after passing through the serpentine groove 110. Figure 3 and Figure 9 As shown, the control power assembly 3 rotates forward, and the intermediate shaft 9 is used to synchronize the axial flow blades 8 and the auger 12 with forward rotation. At this time, the auger 12 will transport the raw materials in the jacket center cavity 112 upward. When the raw material medium pressure at the top of the auger 12 exceeds the elastic force of the return spring 701, it will push the dispersion seat 7 upward. Using the conical bottom of the dispersion seat 7, the raw materials in the jacket center cavity 112 are dispersed into the reaction cavity 1001 in an umbrella shape. At the same time, when the axial flow blades 8 rotate forward, the high-temperature airflow in the reaction cavity 1001 is transported to the stirring tube 13. The stirring tube 13 not only stirs the raw materials in the reaction cavity 1001, but also transfers heat to various areas in the reaction cavity 1001 through the heated stirring tube 13. The airflow output from the stirring tube 13 enters the heat-insulating outer cavity 1002, and the temperature of the heat-insulating outer cavity 1002 increases, ensuring that the raw materials in the reaction cavity 1001 do not experience excessive temperature differences due to the low external temperature. As the airflow in the heat-insulating outer chamber 1002 flows back through the return pipe 15, the high-temperature medium oil in the serpentine channel 110 heats the airflow in the return pipe 15. When the airflow is ejected from the one-way valve at the top of the return pipe 15, the high-temperature airflow acts on the dispersed raw materials, further heating them. This continuous stirring and heat preservation ensures that the raw materials in the reaction chamber 1001 reach the desired state.

[0051] Finally, when the raw materials in the reaction cavity 1001 need to be poured out, the discharge valve body 4 is opened and the power assembly 3 is controlled to rotate in the opposite direction. During this process, the axial flow blades 8 and the auger 12 rotate in the opposite direction simultaneously. The auger 12 will transport the raw materials in the jacket central cavity 112 to the discharge valve body 4, so that the raw materials are quickly discharged from the discharge valve body 4. At the same time, the dispersion seat 7 is pushed by the elastic force of the reset spring 701, which makes the bottom of the dispersion seat 7 hit the top of the heating jacket 11 and form a relative seal. When the axial flow blades 8 rotate in the opposite direction, combined with the Figure 3 and Figure 10It can be seen that the axial flow blades 8 transport the airflow from the inner cavity of the dispersion seat 7 to the reaction cavity 1001. As the pressure in the inner cavity of the dispersion seat 7 decreases, the stirring tube 13 is used to extract the airflow from the heat-insulating outer cavity 1002. During this process, the one-way air valve at the top of the return air pipe 15 is disconnected, and only the air supply pipe 5 inputs pure airflow into the heat-insulating outer cavity 1002. As the axial flow blades 8 continue to rotate in the opposite direction, the pure external airflow passes through the air supply pipe 5, the heat-insulating outer cavity 1002, and the stirring tube 13 and flows into the reaction cavity 1001, ultimately causing the airflow pressure in the reaction cavity 1001 to increase.

[0052] As the airflow pressure in the reaction chamber 1001 increases, the raw materials at the bottom of the reaction chamber 1001 are rapidly filtered through the filter holes 111 into the central cavity 112 of the jacket. Driven by the continuous reverse rotation of the auger 12, the raw materials are forced to be rapidly discharged from the discharge valve body 4. Furthermore, as the power assembly 3 drives the intermediate shaft 9 in reverse rotation, the reduction gear assembly 6 causes the dispersion seat 7 to synchronously rotate in the reverse direction at a low speed. The dispersion seat 7 drives the stirring tube 13 to stir and scrape the raw materials in the reaction chamber 1001, preventing the raw materials from adhering to the reaction chamber 1001 and being unable to be poured out. Finally, when all the raw materials in the reaction chamber 1001 have been poured out, the preparation of the degradable pressure-sensitive adhesive is complete.

Claims

1. An intelligent degradable pressure-sensitive adhesive preparation device, comprising a reactor body (1), a reactor cover (2) with a sight glass cover (200) installed on the top of the reactor body (1), and a discharge valve body (4) installed on the bottom, characterized in that: Also includes: A heating jacket (11) is provided in the inner cavity of the reactor body (1) and is used to heat the raw materials on both sides of the inner and outer sides of the reaction cavity (1001) simultaneously; The power assembly (3) has an output shaft that drives the auger (12) to rotate inside the heating jacket (11) via the intermediate shaft (9), and the auger (12) enables the raw materials in the reaction chamber (1001) to circulate upward and downward; The dispersion seat (7) is movably sleeved on the outside of the intermediate shaft (9) and is used to make the bottom of the dispersion seat contact the top of the heating jacket (11) through the return spring (701); when the auger (12) pushes the raw materials upward, the raw materials at the top of the jacket central cavity (112) are sprayed in an umbrella shape through the bottom of the dispersion seat (7), and the sprayed raw materials are contacted and mixed with the high-temperature airflow at the top of the reaction cavity (1001); The inner cavity of the reactor body (1) is set as the reaction cavity (1001), the inner area of ​​the heating jacket (11) is set as the jacket central cavity (112), and the upper and lower ends of the jacket central cavity (112) are respectively connected to the reaction cavity (1001); The outer wall of the reactor body (1) is provided with an insulating outer cavity (1002) surrounding the reaction inner cavity (1001); the insulating outer cavity (1002) is communicated with the top of the reaction inner cavity (1001); hot air generated by heating the heating jacket (11) is introduced into the insulating outer cavity (1002) through the top of the reaction inner cavity (1001); The intermediate shaft (9) drives the dispersion seat (7) to rotate in the reverse direction at a low speed through the reduction gear assembly (6). An axial flow fan blade (8) located in the inner cavity of the top of the dispersion seat (7) is fixed on the intermediate shaft (9); a stirring tube (13) is connected to the bottom of the dispersion seat (7), and the stirring tube (13) passes through a connecting ring sleeve (10) movably installed on the inner side of the reactor body (1). The air flow generated by the axial flow fan blade (8) is introduced into the heat-insulating outer cavity (1002) through the stirring tube (13); a return air pipe (15) is provided in the heating jacket (11), the bottom of the return air pipe (15) is connected to the heat-insulating outer cavity (1002), and the top is provided with a one-way air valve for one-way flow to the reaction cavity (1001).

2. The intelligent degradable pressure-sensitive adhesive preparation device according to claim 1, characterized in that: A heat medium input pipe (14) and a heat medium output pipe (140) are provided at the bottom of the reactor body (1), a serpentine groove (110) is provided inside the heating jacket (11), the heat medium input pipe (14) is connected to the inlet of the serpentine groove (110), and the heat medium output pipe (140) extends into the outlet of the serpentine groove (110), thereby forming a circulating heating passage for the high-temperature medium oil.

3. The intelligent degradable pressure-sensitive adhesive preparation device according to claim 1, characterized in that: A plurality of filter holes (111) are provided at the bottom of the heating jacket (11), and the apertures of the filter holes (111) are configured to allow raw materials with a predetermined particle size to enter the jacket central cavity (112).

4. The intelligent degradable pressure-sensitive adhesive preparation device according to claim 1, characterized in that: The reduction gear assembly (6) comprises: A drive gear (600) fixed to the intermediate shaft (9); An intermediate gear (601) mounted on the inner side of the kettle cover (2) meshes with the driving gear (600); An outer ring gear (602) is arranged around the driving gear (600) and the intermediate gear (601) and is meshed with the intermediate gear (601).

5. The intelligent degradable pressure-sensitive adhesive preparation device according to claim 1, characterized in that: The stirring tube (13) has any of the following structures: The U-shaped tube has an outer wall in sliding contact with the heating jacket (11) and the inner wall of the reaction chamber (1001); The wavy tube has a curved surface that forms stirring interference with the material in the reaction cavity (1001).

6. The intelligent degradable pressure-sensitive adhesive preparation device according to claim 1, characterized in that: An air supply pipe (5) is fixed on the outside of the reactor body (1). The air supply pipe (5) is connected to the heat-insulating outer cavity (1002) and is provided with a one-way air valve for supplying gas to the heat-insulating outer cavity (1002).

7. A method for using the intelligent degradable pressure-sensitive adhesive preparation device according to claim 2, characterized in that: The following steps are involved: S1, pouring the raw materials for preparing the pressure-sensitive adhesive from the sight glass cover (200) into the reaction cavity (1001), and then sealing the sight glass cover (200); S2, heating the external medium oil and pumping the heated medium oil through the heat medium input pipe (14), so that the high-temperature medium oil passes through the winding groove (110) and is discharged from the heat medium output pipe (140), thereby synchronously heating the inner and outer sides of the heating jacket (11); S3, controlling the power assembly (3) to rotate forward, using the intermediate shaft (9) to drive the auger (12) to rotate forward synchronously, so that the pressure-sensitive adhesive material at the bottom of the reaction chamber (1001) is turned upward through the central cavity (112) of the jacket, thereby realizing the upward and downward circulation of the material in the reaction chamber (1001), and in this process, the upward and downward flowing materials are all heated by the heating jacket (11), so that all the materials in the reaction chamber (1001) are heated relatively evenly; S4. After the raw materials have been stirred, the discharge valve (4) fixed at the bottom of the reactor (1) is opened; S5. Use the power assembly (3) to drive the intermediate shaft (9) to rotate in the opposite direction, thereby driving the auger (12) to rotate in the opposite direction, and quickly pouring the prepared raw materials out of the discharge valve body (4).

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