Preparation method of high-toughness low-temperature fast-curing epoxy adhesive for bonding inert materials

Abstract

The invention relates to the technical field of preparation of high-toughness low-temperature fast-curing epoxy adhesives for bonding inert materials, and discloses a preparation method of a high-toughness low-temperature fast-curing epoxy adhesive for bonding inert materials. The epoxy resin component comprises 80%-94.5% of epoxy resin containing long-chain alkyl and polyurethane, 5%-19.5% of low-viscosity flexible epoxy resin and 0.5%-1% of a coupling agent a, and the low-viscosity flexible epoxy resin enhances the flexibility, crack resistance and mechanical properties of the material; the curing agent component comprises 80%-90% of polythiol, 1%-5% of monohydramine, 5%-15% of tertiary amine urea, 0.5%-1% of a coupling agent b and 0.1%-1% of a defoaming agent, the polythiol provides a rapid curing characteristic, the monohydramine and the tertiary amine urea synergistically enhance the toughness and chemical stability of a curing network, the coupling agent b improves the adhesion, and the defoaming agent avoids bubbles. By combining the weakly acidic coupling agent and the strongly acidic coupling agent, different monohydramine and tertiary amine urea are selectively used, and the curing rate, the mechanical strength and the flexibility are optimized.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials, and in particular to a preparation method of high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials. Background Art

[0002] In industrial applications of bonding inert materials, epoxy adhesives are widely used due to their excellent bonding strength and chemical corrosion resistance. However, traditional epoxy adhesives have low toughness and are prone to brittle cracking or peeling under stress, which brings great limitations to many application scenarios with high mechanical requirements. At the same time, the curing time of epoxy adhesives in the prior art is relatively long, especially in low temperature environments, the curing rate is further reduced, affecting production efficiency. These problems make the development of high-toughness, low-temperature fast-curing epoxy adhesives a technical challenge in industrial bonding needs.

[0003] In response to the technical difficulties in the conveying and palletizing process, the existing conveying equipment often causes uneven stacking due to overlapping and misalignment when transporting finished products to the palletizing area, which is prone to transportation errors. In addition, the existing conveying system lacks the function of automatic adjustment of finished products during transportation. When multiple finished products are stacked or offset at corners, automatic adjustment cannot be effectively achieved. At the same time, it is inefficient to jump the finished products to a unified transportation direction during the transmission of finished products, which leads to poor stability of the finished products during the palletizing process, affecting the degree of automation. In order to alleviate such problems, guide rails or baffles are usually set on the conveyor belt in the existing conveying system, but the complex mechanical structure will increase the system maintenance cost.

[0004] In summary, the existing technology still has a lot of room for improvement in terms of stability and automation during the transportation and stacking of adhesives. Therefore, this case proposes a high-toughness, low-temperature, fast-curing epoxy adhesive and a preparation method thereof, which can solve the above-mentioned problems in the existing technology. Summary of the invention

[0005] The present invention provides a method for preparing a high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials, which helps solve the problems mentioned in the above background technology.

[0006] The present invention provides the following technical solution: a method for preparing a high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials, comprising:

[0007] The epoxy adhesive comprises an epoxy resin component and a curing agent component;

[0008] The epoxy resin component comprises 80% to 94.5% by weight of an epoxy resin containing a long-chain hydrocarbon group and a polyurethane group;

[0009] The epoxy resin component further comprises 5% to 19.5% by weight of a low-viscosity flexible epoxy resin, wherein the epoxy equivalent of the low-viscosity flexible epoxy resin is 300 g / eq to 600 g / eq;

[0010] The epoxy resin component further comprises 0.5% to 1% of coupling agent a by weight percentage;

[0011] The curing agent component comprises, by weight percentage: 80% to 90% of polythiol, 1% to 5% of monoalcohol amine, 5% to 15% of tertiary amine urea, 0.5% to 1% of coupling agent b and 0.1% to 1% of defoaming agent;

[0012] The coupling agent a is a weakly acidic epoxy silane coupling agent, and the coupling agent b is a strongly acidic amino silane coupling agent;

[0013] The polythiol is a polythiol having three or four thiol groups at the end;

[0014] The monoalcoholamine is one of ethanolamine, 3-propanolamine, isopropanolamine, 2-amino-1-butanol or isobutanolamine;

[0015] The structural formula of the tertiary amine urea is [R2NXNH]2CO], wherein: X is a C2-C3 alkyl chain, and R is a C1-C2 alkyl chain;

[0016] The preparation of epoxy resin combination and curing agent component was carried out.

[0017] Optionally, the preparation of the epoxy resin combination and the curing agent component specifically includes:

[0018] Preparation of epoxy resin component: under a protective gas atmosphere, add epoxy resin containing long-chain hydrocarbon group and polyurethane group and low-viscosity flexible epoxy resin according to a proportion, set the temperature to 45°C to 65°C, mix and stir until soaked, add coupling agent a and stir and mix evenly, evacuate to remove bubbles, and obtain epoxy resin component;

[0019] Preparation of curing agent component: under the atmosphere of protective gas, add polythiol, monoolamine and tertiary amine urea, set the temperature to 25°C to 45°C, stir and mix evenly, add coupling agent b and defoamer and stir and mix evenly, then vacuum and remove bubbles to obtain curing agent component;

[0020] The high-toughness, low-temperature, fast-curing epoxy adhesive is prepared through the preparation process of the high-toughness, low-temperature, fast-curing epoxy adhesive.

[0021] Optionally, the high-toughness, low-temperature, fast-curing epoxy adhesive is prepared by the preparation process of the high-toughness, low-temperature, fast-curing epoxy adhesive, specifically comprising:

[0022] The working area for preparing the high-toughness, low-temperature, fast-curing epoxy adhesive is placed in a protective gas environment, wherein the protective gas is specifically an inert gas, and nitrogen is selected as the protective gas in the preparation process;

[0023] Weigh the prepared epoxy resin component and curing agent component respectively so that the weight ratio of the epoxy resin component to the curing agent component is 1.5:1;

[0024] The weighed epoxy resin component and the curing agent component are placed in different clean containers, wherein the clean container has no impurities attached to the container wall;

[0025] Place the containers containing the epoxy resin component and the curing agent component in an environment of 25°C to 35°C respectively;

[0026] After the container containing the epoxy resin component and the curing agent component is placed in an environment of 25°C to 35°C for 15 minutes, the curing agent component is poured into the epoxy resin component container, and the mixed epoxy resin component and curing agent component are recorded as a mixture;

[0027] Continue stirring the mixture for 3 to 5 minutes;

[0028] Place the mixture into a vacuum device, adjust the vacuum device to -0.08 to -0.1 MPa, and evacuate for 2 to 3 minutes;

[0029] Check the mixture for bubbles. If present, shake the container to remove them.

[0030] Heat the mixture to 35°C to 45°C and keep the temperature constant;

[0031] Apply the treated epoxy adhesive to the surface of the substrate to be bonded;

[0032] Set coating pressure;

[0033] After coating, pressurize to the set coating pressure so that there is no gap between the substrate surface and the mixture;

[0034] The ambient temperature is adjusted to -5°C to 10°C, and the coated mixture is placed at the ambient temperature for 2 hours to complete curing;

[0035] Packaging the cured mixture;

[0036] The packaged mixture is transported to the palletizing area by conveyor.

[0037] Optionally, the step of transporting the packaged mixture to a palletizing area by transmission specifically includes:

[0038] The encapsulated mixture is recorded as a finished product. The finished product forms a quadrangular prism structure after encapsulation. The longest edge length in the quadrangular prism structure is regarded as the long side of the finished product, the shortest edge length is regarded as the thickness of the finished product, and the other edge lengths are regarded as the short sides of the finished product.

[0039] Get a rectangular metal plate;

[0040] Get three conveyor belts and name them as conveyor belt No. 1, conveyor belt No. 2 and conveyor belt No. 3 respectively. The width of conveyor belt No. 3 = the width of conveyor belt No. 2 + the length of the long side of the finished product.

[0041] Set height 1 and height 2, where height 1>height 2;

[0042] Set conveyor belt No. 1 parallel to the horizontal plane at height 1;

[0043] Set the No. 2 conveyor belt parallel to the horizontal plane at height 2, so that the short side of the No. 1 conveyor belt is parallel to the long side of the No. 2 conveyor belt, and the vertical projection planes of the No. 1 conveyor belt and the No. 2 conveyor belt on the horizontal plane do not intersect;

[0044] Project conveyor belt No. 1 and conveyor belt No. 2 onto the horizontal plane, compare the distances between the short side of conveyor belt No. 1 and the long side of conveyor belt No. 2, and obtain the pair of short sides and long sides with the shortest distance, which are recorded as the first connection end of conveyor belt No. 1 and the first connection end of conveyor belt No. 2, respectively.

[0045] Optionally, the step of transporting the packaged mixture to a palletizing area by transmission specifically includes:

[0046] Obtain any edge of the metal plate as the first edge of the metal plate, and obtain an edge parallel to the first edge as the second edge of the metal plate;

[0047] Place the metal edge No. 1 close to the No. 1 connection end of the No. 1 conveyor belt, so that the distance between the metal edge No. 1 and the No. 1 connection end of the No. 1 conveyor belt is less than 2 cm;

[0048] The forward transport direction of conveyor belt No. 2 is recorded as left, and the reverse transport direction is recorded as right;

[0049] Place the second side of the metal plate close to the first connection end of the second conveyor belt, so that the distance between the second side of the metal and the first connection end of the second conveyor belt is less than 2cm, and extend the short side of the left side of the second conveyor belt to intersect with the second side of the metal plate. The distance between the intersection and the adjacent side of the second side of the metal plate is the length of the short side of the finished product.

[0050] Obtain two parallel sides of the metal plate perpendicular to the long side of the No. 2 conveyor belt, and record them as the No. 3 side of the metal plate and the No. 4 side of the metal plate respectively;

[0051] Obtain the midpoints of the third side and the fourth side of the metal plate respectively, connect the two midpoints, and record the connecting line as the blocking projection line;

[0052] Get the thickness value of the finished product;

[0053] A cylindrical blocking rod parallel to the blocking projection line is arranged above the blocking projection line, and the distance between the cylindrical blocking rod and the blocking projection line is greater than the thickness of the finished product and less than the short side length of the finished product;

[0054] The third side and the fourth side of the metal plate are extended to intersect with the extended sides of the two long sides of the No. 2 conveyor belt. The area between the intersections on the No. 2 conveyor belt is recorded as the effective area, and the area to the right of the effective area is recorded as the buffer area. The buffer area is used to prevent the transported finished products from falling when the No. 2 conveyor belt is transported in the reverse direction.

[0055] Optionally, the step of transporting the packaged mixture to a palletizing area by transmission specifically includes:

[0056] Get a vertex of the short side of the No. 3 conveyor belt and record it as point A, and another vertex as point C. Find a point on the short side and record it as point B, so that the distance from point B to point A is equal to the length of the short side of the No. 2 conveyor belt;

[0057] Set conveyor belt No. 3 parallel to the horizontal plane at height two, so that the distance between one short side of conveyor belt No. 3 and one short side of conveyor belt No. 2 is less than two centimeters, and conveyor belt No. 3 is on the left side of conveyor belt No. 2, wherein point A and point B are respectively on the extension lines of the two long sides of conveyor belt No. 2, and the projection of point C on the horizontal plane is on the projection plane of the metal plate on the horizontal plane.

[0058] Optionally, the step of transporting the packaged mixture to a palletizing area by transmission specifically includes:

[0059] Get the longest side length of the finished product and record it as the blocking side;

[0060] Obtain the shortest side of the finished product, which is recorded as the pass side, and the length of the shortest side is greater than the thickness value of the finished product;

[0061] Obtain a cylindrical blocking rod;

[0062] Get the radius of the cylindrical blocking rod;

[0063] Find a point on the metal plate as the reference point, and draw a perpendicular line from the reference point to the No. 3 conveyor belt, so that the length of the passing side + the radius of the cylindrical blocking stem < the length of the perpendicular line < the length of the blocking side;

[0064] A cylindrical blocking rod is set on the metal plate as a finished blocking rod, so that the center of the bottom surface of the cylindrical blocking rod coincides with the reference point, and the blocking rod is parallel to the short side of the No. 3 conveyor belt; and a force sensor is set on the blocking rod.

[0065] Optionally, the step of transporting the packaged mixture to a palletizing area by transmission specifically includes:

[0066] Start the No. 1 conveyor belt to transport forward, and transport the finished products on the No. 1 conveyor belt to the metal plate. When the finished products on the metal plate are overlapped, the overlapping finished products are separated from each other through the blocking rod on the metal plate, so that all the finished products falling on the No. 2 conveyor belt are single finished products;

[0067] Set the transport time threshold of conveyor belt No. 1;

[0068] Set the transport stop time threshold of conveyor belt No. 1;

[0069] When the time that conveyor belt No. 1 starts to transport = the transport time threshold of conveyor belt No. 1, the transport of conveyor belt No. 1 is stopped; when the time that the transport is stopped = the transport stop time threshold of conveyor belt No. 1, conveyor belt No. 1 is started again for transport;

[0070] When a finished product slides onto the No. 2 conveyor belt, the No. 2 conveyor belt is started for forward transportation and transported to the No. 3 conveyor belt. When a finished product is transported to the No. 3 conveyor belt, the No. 3 conveyor belt is started for forward transportation.

[0071] Set the maximum force threshold of the blocking rod;

[0072] When the finished product is transported to the No. 3 conveyor belt, obtain the force value exerted on the blocking rod;

[0073] If the force value on the blocking rod is less than or equal to the maximum force threshold of the blocking rod, continue to transport the finished product;

[0074] If the force value on the blocking rod is greater than the maximum force threshold of the blocking rod, the transport direction of the second transmission is adjusted to reverse transport;

[0075] The force value of the blocking rod is obtained in real time. When the force value of the blocking rod is less than or equal to the maximum force threshold of the blocking rod, the transport direction of the No. 2 conveyor belt is adjusted to forward transport.

[0076] The finished products are adjusted to a uniform direction by the No. 3 conveyor belt and transported to the palletizing area.

[0077] The present invention has the following beneficial effects:

[0078] 1. The epoxy resin containing long-chain hydrocarbon groups and polyurethane groups provides excellent flexibility and impact resistance, so that the final adhesive has higher toughness after curing, and at the same time improves the bonding ability to complex substrates. The introduction of low-viscosity flexible epoxy resin reduces the viscosity of the overall resin component, which is convenient for mixing and coating. At the same time, by adjusting the epoxy equivalent, the flexibility and crack resistance of the material are enhanced. It can also improve the mechanical properties of the adhesive after curing, such as tensile strength and shear strength, and is suitable for application scenarios requiring flexibility and high performance. The addition of weakly acidic epoxy silane coupling agent a promotes the chemical bonding ability between the epoxy resin and the surface of the substrate, and improves the adhesion strength of the adhesive. The curing agent component includes, by weight percentage: 80% to 90% of polythiol, 1% to 5% of monoalcohol amine, 5% to 15% of tertiary amine urea, 0.5% to 1% of coupling agent b and 0.1% to 1% of defoaming agent. This proportion design comprehensively considers curing speed, flexibility, mechanical strength and ease of operation. Polythiol as the main curing agent provides fast curing characteristics, and monoalcohol amine and tertiary amine urea further optimize the toughness and chemical stability of the cured network through synergistic effects. Coupling agent b improves the adhesion performance with the substrate, while the defoamer reduces bubble formation to ensure the flatness and consistent quality of the bonding interface. By using weak acid and strong acid coupling agents at the same time, the interfacial chemical bonding between the epoxy resin and the curing agent and the substrate can be optimized respectively. The terminal polythiol-based polythiol can react quickly to form a high-density cross-linked network, giving the cured product excellent chemical resistance and heat resistance. Selecting a variety of monoalcohol amines as ingredients provides flexibility and adjustment space for the curing agent. The specific structure of tertiary amine urea gives it good catalytic properties, which can accelerate the epoxy curing reaction and form a dense cross-linked network. The epoxy resin component and the curing agent component are prepared separately, which helps to improve the mixing uniformity and reduce the probability of side reactions during the curing process.

[0079] 2. Operating under protective gas reduces the contact between epoxy resin and oxygen or moisture, and reduces the risk of side reactions during the reaction process. By controlling the temperature at 45℃~65℃, the resin maintains appropriate fluidity, which is conducive to uniform mixing and infiltration. The infiltration process ensures sufficient contact between different molecular chains, improves the cross-linking efficiency during subsequent curing, and thus improves the toughness and bonding properties of the adhesive. The addition of coupling agent a enhances the interfacial bonding between epoxy resin and inorganic substrate, and improves the adhesion performance through chemical bonding. Stirring and mixing ensures uniform distribution of the coupling agent to avoid local performance imbalance. The vacuum degassing process effectively prevents the presence of pores in the cured material, improves the mechanical properties and sealing properties of the adhesive, and avoids appearance defects and inconsistent performance. Operating under a protective atmosphere can prevent the components from reacting adversely with moisture or oxygen in the air and maintain the chemical stability of the curing agent components. Temperature control at 25℃~45℃ ensures that the components of the curing agent maintain appropriate fluidity within the liquid range, which is convenient for full mixing. Evenly stirring and mixing ensures uniform distribution of reactive components, improves uniformity in the subsequent curing process, and avoids problems of insufficient local curing or insufficient toughness. Coupling agent b improves the adhesion of adhesives to various substrates, especially metal or polymer substrates that are difficult to bond, by strengthening the interface bonding between the curing agent and the substrate. The addition of defoaming agent reduces bubbles generated during stirring and improves the quality stability of the mixture. Vacuuming and removing bubbles eliminates potential micropores, ensuring that the adhesive has high density and high toughness after curing, avoiding the degradation of mechanical properties caused by pores. The preparation process of high-toughness low-temperature fast-curing epoxy adhesives is used to prepare high-toughness low-temperature fast-curing epoxy adhesives. The clear preparation process ensures that the performance goals of epoxy adhesives are achieved, that is, they have both high toughness and low-temperature fast-curing characteristics. Through process optimization, the curing temperature is reduced and the time is shortened to meet the needs of harsh construction conditions.

[0080] 3. Operating in an inert gas environment (such as nitrogen) effectively avoids the reaction of epoxy resin and curing agent with moisture or oxygen in the air, prevents unnecessary side reactions, and ensures the chemical stability of the material. In addition, nitrogen protection can reduce the introduction of impurities and oxidative degradation, improve the purity and product performance consistency during the preparation of the adhesive, and use clean containers to avoid the influence of impurities on the performance of the mixture, ensuring that no uncontrollable side reactions occur during the preparation process. In addition, the container wall without impurities reduces the adhesion between the resin and the container, facilitates the complete removal of the mixture, improves the preparation efficiency and raw material utilization, thereby ensuring the consistency and high quality of the product. By controlling the container ambient temperature at 25℃~35℃, the components are in the best pre-reaction state, avoiding premature reactions caused by excessive temperature and preventing excessive viscosity caused by low temperature from affecting subsequent operations. The components are properly placed for 15 minutes to fully reach temperature equilibrium to avoid uneven reactions caused by temperature differences during mixing. Stirring continuously for 3 to 5 minutes ensures that the epoxy resin and curing agent are fully mixed to form a uniform system. The vacuum degassing process effectively removes bubbles in the mixture to avoid expansion or residue of bubbles during the curing process that affects the bonding strength or appearance quality. In addition, vacuum conditions also promote the fluidity of the mixture, further optimize the coating effect, and improve the density of the product at the microscopic level. Manual inspection and vibration operations provide supplementary means for vacuum degassing, further ensuring that there are no residual bubbles inside the mixture. The mixture is heated to an appropriate temperature and kept constant to provide the best thermal environment for the curing reaction. This temperature control operation increases the reaction rate while avoiding incomplete curing or performance degradation caused by too high or too low temperature, thereby improving the overall performance of the adhesive. The uniform coating of the adhesive ensures full contact between the substrate surface and the adhesive, laying the foundation for bonding performance. The setting of the coating pressure ensures full fit between the adhesive and the substrate, avoiding bonding defects caused by insufficient local pressure. The pressurization operation eliminates all gaps between the substrate surface and the adhesive, ensuring the continuity and consistency of the bonding surface. This operation improves the bonding performance, avoids weak areas caused by gaps, improves the impact resistance and long-term stability of the product, and the low-temperature curing process optimizes the molecular structure of the adhesive, forming a high-density cross-linked network, while accelerating the construction cycle. Adjusting the ambient temperature ensures the adaptability of the material under specific working conditions, such as application requirements in low-temperature areas, and enhances the reliability of the product in extreme environments. The encapsulation step after curing protects the surface of the material from contamination or damage from the external environment, ensuring the integrity of the product during transportation and storage. It is transported to the palletizing area through standardized transmission methods, ensuring the efficiency of batch processing of the product. Standardized processes reduce the risk of damage caused by manual intervention, improve the efficiency of production and logistics links, and create convenient conditions for subsequent distribution and use.

[0081] 4. By clarifying the geometric shape and definition of each side of the finished product, it is helpful to standardize the appearance and size description of the product, and facilitate the design and implementation of subsequent transmission and palletizing. Dividing the edges into long sides, short sides and thickness facilitates the parameter setting of the production line and transmission equipment, and improves the adaptability and operating efficiency of the finished product in different processes. The number and size requirements of the conveyor belts are clarified to ensure the integrity and uniformity of the transmission system. The special design of the width of the No. 3 conveyor belt adapts to the long side size of the finished product, meets the stable placement requirements of the finished product during the transmission process, and improves the compatibility and reliability of the transmission system. Setting height 1 and height 2 as different levels provides a basis for the layout of multi-layer conveyor belts, so that the transmission path can be staggered up and down, thereby saving space and optimizing the overall layout design. At the same time, the height difference design facilitates the gravity-assisted transfer of finished products and reduces the energy consumption of the transmission system. The No. 1 conveyor belt is arranged horizontally at a higher height 1 to ensure its stability in the initial stage of transmission. The setting of height 1 provides sufficient operating space, which is conducive to the effective connection with other conveyor belts in the future, while reducing the risk of interference in mechanical transmission and ensuring smooth operation. The arrangement of the No. 2 conveyor belt at height 2 forms a high-low staggered layer, and its parallel relationship with the No. 1 conveyor belt ensures the continuity of the transmission path. The parallel setting of the short side and the long side simplifies the design of the transmission connection, and the non-intersecting projection surfaces avoid path conflicts, provide a clear material flow direction, and reduce interference in system operation. Conveyor belts No. 1 and No. 2 are set at different heights, with the position of conveyor belt No. 1 higher than that of conveyor belt No. 2, which is conducive to forming a height difference, and the projections of conveyor belts No. 1 and No. 2 on the horizontal plane do not intersect, so that an inclined plane will be formed when conveyor belts No. 1 and No. 2 are connected, so that the items are transported by conveyor belt No. 1 and slide onto conveyor belt No. 2 through the inclined plane.

[0082] 5. By defining the first and second sides of the metal plate, the boundary reference of the metal plate is clarified, providing a clear basis for subsequent operations. The boundary definition facilitates the design and description of the relative position relationship between the metal plate and the conveyor belt. The first side of the metal is close to the connection end of the conveyor belt and the spacing is maintained at less than 2 cm, ensuring the precise docking between the metal plate and the conveyor belt, reducing the possibility of deviation during material transmission. Fine spacing control can improve the transmission stability and safety of the finished product and reduce errors. The transportation direction of the second conveyor belt is clarified, and the unified direction naming provides a clear reference standard for the subsequent regional division and function definition. By adjusting the position and intersection definition of the second side of the metal plate, the metal plate and the conveyor belt can be docked with high precision, and the position relationship is optimized based on the short side length of the finished product. This layout improves the accuracy of the transmission system, helps stabilize the delivery process of the finished product, and reduces the possibility of material misalignment. The third and fourth sides of the metal plate are defined, and by clarifying their relationship with the long side of the second conveyor belt, it provides a key reference for the subsequent blocking line setting. The midpoints of the metal plates are connected to form a blocking projection line, which provides a baseline for the physical blocking design of the finished product. Through the symmetrical positioning of the midpoint, the blocking projection line can accurately cover the key area to ensure that the finished product is correctly guided or blocked during the transmission process. The thickness value of the finished product is measured to provide the necessary parameter basis for the subsequent baffle setting. The thickness data enables the baffle height design to accurately match the characteristics of the finished product, thereby effectively avoiding the situation where the baffle is too high and causes failure, or too low to hinder normal transmission. The cylindrical baffle is set near the blocking projection line, and its position range is clarified, so that it does not affect the passage of the finished product and can effectively prevent the finished product from leaving the track. Reasonable spacing design ensures the smoothness and safety of transmission, while avoiding operational failures caused by improper distance. This can prevent the stacking of finished products from sliding onto the No. 2 conveyor belt. The setting of the buffer area provides additional safety space for reverse transportation to prevent the finished product from falling due to inertia, which helps to reduce the product damage rate and improve the operational stability and reliability of the production line.

[0083] 6. This step ensures that the arrangement of conveyor belt 3 can form a specific spatial relationship with conveyor belt 2 by defining points A, B and C and setting the distance between point B and point A. In this way, by positioning point B, the short side lengths of conveyor belt 3 and conveyor belt 2 can be aligned with each other, which is convenient for subsequent connection and makes product transmission smoother. Conveyor belt 3 is set to be less than two centimeters away from conveyor belt 2 and set parallel in the horizontal plane to meet specific height and position requirements. This setting ensures the precise positioning of conveyor belt 3 on the left side of conveyor belt 2, allowing the finished product to seamlessly transition from conveyor belt 2 to conveyor belt 3, while reducing the possibility of product slipping or tilting due to height differences. By aligning the horizontal plane projection of point C with the projection plane of the metal plate, the spatial positioning of conveyor belt 3 is ensured to be coordinated with the metal plate. This layout provides additional support for the finished product when it moves to conveyor belt 3, reducing the risk of possible falling and helping to improve the stability of the overall conveyor system.

[0084] 7. Determine the length of the longest side of the finished product and record it as the obstruction side, which is helpful to set the key dimensions that may block the movement of the finished product during the transmission process, facilitate the effective layout of the blocking device and the relevant conveyor belt position in the subsequent steps, define the shortest side as the pass side, and ensure that the length of the pass side is greater than the thickness of the finished product, which is conducive to the subsequent setting of a suitable transmission path. By clarifying the relationship between the pass side and the thickness, the finished product can maintain a reasonable passing space when encountering the blocking rod, prevent the transmission jam caused by insufficient thickness or improper size matching, thereby improving the transmission stability and overall efficiency. Determine the radius of the blocking rod, which provides a dimensional basis for the reasonable setting of the distance relationship between the conveyor belt and the blocking device. The acquisition of the radius value ensures that enough space can be reserved when designing the blocking system, determine the reference point on the metal plate and set the vertical length range to ensure that the passing path and space of the finished product on the conveyor belt meet the requirements. The setting of the reference point and the vertical length limit enable the blocking device of the conveying system to be accurately adjusted, and effectively avoid the jamming or accumulation of finished products by limiting the passage area, thereby improving the overall smoothness and reliability of the system. Aligning the center of the bottom of the blocking bar with the reference point and making it parallel to the short side of the No. 3 conveyor ensures the optimal physical position and orientation of the blocking bar, allowing the finished products to pass smoothly or be intercepted. This parallel setting makes the product control of the conveying system more precise, helps guide the movement trajectory of the finished products, and provides a physical basis for detection and diversion. Installing a force sensor on the blocking bar can monitor the contact force between the finished product and the blocking bar in real time and provide feedback data for the conveyor control system. By setting the blocking bar and designing the position of the blocking bar, it can be ensured that the finished products are all transported with the short side in the direction of transportation when transported through the No. 3 conveyor, ensuring the consistency of the direction of the finished products in transportation.

[0085] 8. Start conveyor belt No. 1 to transfer the finished products to the metal plate, and use the blocking rod to separate the stacked finished products, which can effectively separate and organize the finished products and ensure that the finished products that fall on conveyor belt No. 2 are single individuals. This processing method improves the accuracy of subsequent transportation and palletizing, prevents transportation deviation, jamming or equipment wear caused by stacking, and simplifies subsequent operation procedures. By setting the transportation time threshold, the working cycle of conveyor belt No. 1 can be accurately controlled to avoid excessive accumulation of finished products on the side of the metal plate close to conveyor belt No. 1. Set a time threshold for the stop interval of conveyor belt No. 1 to ensure that the accumulation of finished products on the metal plate is reduced during the stop period, and the accumulation of finished products on conveyor belt No. 2 is also reduced. The linkage design of conveyor belts No. 2 and 3 ensures the continuity of the transportation process of finished products. When the finished product enters the No. 2 conveyor belt, the system automatically starts the conveyor belt for transportation, avoiding the inefficiency caused by manual operation, and realizing the automated management of the entire process, improving the overall work efficiency and operation stability, and setting the maximum force threshold for the blocking rod. In this way, it can be judged whether the blocked finished product can be changed in transportation posture through the force condition of the blocking rod. If the force value of the blocking rod is ≦the maximum force threshold of the blocking rod, it means that the blocked finished product can be changed in transportation posture through the blocking rod. When the force of the blocking rod exceeds the standard, it means that the blocked finished product is in the process of changing its transportation posture. In the process, there is a finished product on the right side of the blocked finished product that prevents the blocked finished product from changing its transportation posture. The No. 2 conveyor belt is automatically adjusted to reverse transportation, so that the blocked finished product can be moved to the right, creating space for the finished product that needs to change its transportation posture to flow out, so that the changed finished product can complete the change of transportation posture. The force value of the blocking rod is obtained in real time. When the force value of the blocking rod is ≦ the maximum force threshold of the blocking rod, the transportation direction of the No. 2 conveyor belt is adjusted to forward transportation. The real-time monitoring of the force on the blocking rod is combined with the dynamic adjustment of the direction of the No. 2 conveyor belt, which can restore normal transportation in the shortest time. This intelligent feedback mechanism reduces the need for manual intervention, improves the response speed and automation level of the production line, and ensures the efficiency and safety of transportation. The No. 3 conveyor belt realizes the function of adjusting the direction of finished products, ensuring that all finished products enter the stacking area in a unified direction, which is convenient for subsequent stacking operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] Figure 1 It is a schematic diagram of placing the conveyor belt metal plate and the blocking rod of the present invention.

[0087] 1 is conveyor belt No. 1, 2 is metal plate, 3 is conveyor belt No. 2, 4 is conveyor belt No. 3, 5 is cylindrical blocking rod, 6 is finished product blocking rod, 7 is connecting end No. 1 of conveyor belt No. 1, 8 is metal edge No. 1, 9 is metal edge No. 4, 10 is metal edge No. 3, 11 is metal edge No. 2, 12 is connecting end No. 1 of conveyor belt No. 2, 13 is buffer area, 14 is effective area, 15 is point A, 16 is point B, and 17 is point B. DETAILED DESCRIPTION

[0088] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0089] Embodiment, a method for preparing a high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials, comprising:

[0090] The epoxy adhesive comprises an epoxy resin component and a curing agent component;

[0091] The epoxy resin component comprises 80% to 94.5% by weight of an epoxy resin containing a long-chain hydrocarbon group and a polyurethane group;

[0092] The epoxy resin component further comprises 5% to 19.5% by weight of a low-viscosity flexible epoxy resin, wherein the epoxy equivalent of the low-viscosity flexible epoxy resin is 300 g / eq to 600 g / eq;

[0093] The epoxy resin component further comprises 0.5% to 1% of coupling agent a by weight percentage;

[0094] The curing agent component comprises, by weight percentage: 80% to 90% of polythiol, 1% to 5% of monoalcohol amine, 5% to 15% of tertiary amine urea, 0.5% to 1% of coupling agent b and 0.1% to 1% of defoaming agent;

[0095] The coupling agent a is a weakly acidic epoxy silane coupling agent, and the coupling agent b is a strongly acidic amino silane coupling agent;

[0096] The polythiol is a polythiol having three or four thiol groups at the end;

[0097] The monoalcoholamine is one of ethanolamine, 3-propanolamine, isopropanolamine, 2-amino-1-butanol or isobutanolamine;

[0098] The structural formula of the tertiary amine urea is [R2NXNH]2CO], wherein: X is a C2-C3 alkyl chain, and R is a C1-C2 alkyl chain;

[0099] The preparation of epoxy resin combination and curing agent component was carried out.

[0100] The epoxy resin containing long-chain hydrocarbon groups and polyurethane groups provides excellent flexibility and impact resistance, so that the final adhesive has higher toughness after curing, and at the same time improves the bonding ability to complex substrates. The introduction of low-viscosity flexible epoxy resin reduces the viscosity of the overall resin component, which is convenient for mixing and coating. At the same time, by adjusting the epoxy equivalent, the flexibility and crack resistance of the material are enhanced. It can also improve the mechanical properties of the adhesive after curing, such as tensile strength and shear strength, and is suitable for application scenarios requiring flexibility and high performance. The addition of weakly acidic epoxy silane coupling agent a promotes the chemical bonding ability between the epoxy resin and the surface of the substrate, and improves the adhesion strength of the adhesive. The curing agent component includes, by weight percentage: 80% to 90% of polythiol, 1% to 5% of monoalcohol amine, 5% to 15% of tertiary amine urea, 0.5% to 1% of coupling agent b and 0.1% to 1% of defoaming agent. This proportion design comprehensively considers curing speed, flexibility, mechanical strength and ease of operation. Polythiol as the main curing agent provides fast curing characteristics, and monoalcohol amine and tertiary amine urea further optimize the toughness and chemical stability of the cured network through synergistic effects. Coupling agent b improves the adhesion performance with the substrate, while the defoamer reduces bubble formation to ensure the flatness and consistent quality of the bonding interface. By using weak acid and strong acid coupling agents at the same time, the interfacial chemical bonding between the epoxy resin and the curing agent and the substrate can be optimized respectively. The terminal polythiol-based polythiol can react quickly to form a high-density cross-linked network, giving the cured product excellent chemical resistance and heat resistance. Selecting a variety of monoalcohol amines as ingredients provides flexibility and adjustment space for the curing agent. The specific structure of tertiary amine urea gives it good catalytic properties, which can accelerate the epoxy curing reaction and form a dense cross-linked network. The epoxy resin component and the curing agent component are prepared separately, which helps to improve the mixing uniformity and reduce the probability of side reactions during the curing process.

[0101] The preparation of the epoxy resin combination and the curing agent component specifically includes:

[0102] Preparation of epoxy resin component: under a protective gas atmosphere, add epoxy resin containing long-chain hydrocarbon group and polyurethane group and low-viscosity flexible epoxy resin according to a proportion, set the temperature to 45°C to 65°C, mix and stir until soaked, add coupling agent a and stir and mix evenly, evacuate to remove bubbles, and obtain epoxy resin component;

[0103] Preparation of curing agent component: under the atmosphere of protective gas, add polythiol, monoolamine and tertiary amine urea, set the temperature to 25°C to 45°C, stir and mix evenly, add coupling agent b and defoamer and stir and mix evenly, then vacuum and remove bubbles to obtain curing agent component;

[0104] The high-toughness, low-temperature, fast-curing epoxy adhesive is prepared through the preparation process of the high-toughness, low-temperature, fast-curing epoxy adhesive.

[0105] Operating under protective gas reduces the contact between epoxy resin and oxygen or moisture, and reduces the risk of side reactions during the reaction process. By controlling the temperature at 45℃~65℃, the resin maintains appropriate fluidity, which is conducive to uniform mixing and infiltration. The infiltration process ensures sufficient contact between different molecular chains, improves the cross-linking efficiency during subsequent curing, and thus improves the toughness and bonding properties of the adhesive. The addition of coupling agent a enhances the interfacial bonding between epoxy resin and inorganic substrate, and improves the adhesion performance through chemical bonding. Stirring and mixing ensures uniform distribution of the coupling agent to avoid local performance imbalance. The vacuum degassing process effectively prevents the presence of pores in the cured material, improves the mechanical properties and sealing properties of the adhesive, and avoids appearance defects and inconsistent performance. Operating under a protective atmosphere can prevent the components from reacting adversely with moisture or oxygen in the air and maintain the chemical stability of the curing agent components. Temperature control at 25℃~45℃ ensures that the components of the curing agent maintain appropriate fluidity within the liquid range, which is convenient for full mixing. Evenly stirring and mixing ensures uniform distribution of reactive components, improves uniformity in the subsequent curing process, and avoids problems of insufficient local curing or insufficient toughness. Coupling agent b improves the adhesion of adhesives to various substrates, especially metal or polymer substrates that are difficult to bond, by strengthening the interface bonding between the curing agent and the substrate. The addition of defoaming agent reduces bubbles generated during stirring and improves the quality stability of the mixture. Vacuuming and removing bubbles eliminates potential micropores, ensuring that the adhesive has high density and high toughness after curing, avoiding the degradation of mechanical properties caused by pores. The preparation process of high-toughness low-temperature fast-curing epoxy adhesives is used to prepare high-toughness low-temperature fast-curing epoxy adhesives. The clear preparation process ensures that the performance goals of epoxy adhesives are achieved, that is, they have both high toughness and low-temperature fast-curing characteristics. Through process optimization, the curing temperature is reduced and the time is shortened to meet the needs of harsh construction conditions.

[0106] The high-toughness, low-temperature, fast-curing epoxy adhesive is prepared by the preparation process of the high-toughness, low-temperature, fast-curing epoxy adhesive, specifically comprising:

[0107] The working area for preparing the high-toughness, low-temperature, fast-curing epoxy adhesive is placed in a protective gas environment, wherein the protective gas is specifically an inert gas, and nitrogen is selected as the protective gas in the preparation process;

[0108] Weigh the prepared epoxy resin component and curing agent component respectively so that the weight ratio of the epoxy resin component to the curing agent component is 1.5:1;

[0109] The weighed epoxy resin component and the curing agent component are placed in different clean containers, wherein the clean container has no impurities attached to the container wall;

[0110] Place the containers containing the epoxy resin component and the curing agent component in an environment of 25°C to 35°C respectively;

[0111] After the container containing the epoxy resin component and the curing agent component is placed in an environment of 25°C to 35°C for 15 minutes, the curing agent component is poured into the epoxy resin component container, and the mixed epoxy resin component and curing agent component are recorded as a mixture;

[0112] Continue stirring the mixture for 3 to 5 minutes;

[0113] Place the mixture into a vacuum device, adjust the vacuum device to -0.08 to -0.1 MPa, and evacuate for 2 to 3 minutes;

[0114] Check the mixture for bubbles. If present, shake the container to remove them.

[0115] Heat the mixture to 35°C to 45°C and keep the temperature constant;

[0116] Apply the treated epoxy adhesive to the surface of the substrate to be bonded;

[0117] Set coating pressure;

[0118] After coating, pressurize to the set coating pressure so that there is no gap between the substrate surface and the mixture;

[0119] The ambient temperature is adjusted to -5°C to 10°C, and the coated mixture is placed at the ambient temperature for 2 hours to complete curing;

[0120] Packaging the cured mixture;

[0121] The packaged mixture is transported to the palletizing area by conveyor.

[0122] Operating in an inert gas environment (such as nitrogen) effectively prevents the epoxy resin and curing agent from reacting with moisture or oxygen in the air, prevents unnecessary side reactions, and ensures the chemical stability of the material. In addition, nitrogen protection can reduce the introduction of impurities and oxidative degradation, improve the purity and product performance consistency during the preparation of the adhesive, and use clean containers to avoid the influence of impurities on the performance of the mixture, ensuring that no uncontrollable side reactions occur during the preparation process. In addition, the container wall without impurities reduces the adhesion between the resin and the container, facilitates the complete removal of the mixture, improves the preparation efficiency and raw material utilization, thereby ensuring the consistency and high quality of the product. By controlling the container ambient temperature at 25℃~35℃, the components are in the best pre-reaction state, avoiding premature reactions caused by excessive temperatures and preventing excessive viscosity caused by low temperatures from affecting subsequent operations. The components are properly placed for 15 minutes to fully reach temperature equilibrium to avoid uneven reactions caused by temperature differences during mixing. Stirring continuously for 3 to 5 minutes ensures that the epoxy resin and curing agent are fully mixed to form a uniform system. The vacuum degassing process effectively removes bubbles in the mixture to avoid expansion or residue of bubbles during the curing process that affects the bonding strength or appearance quality. In addition, vacuum conditions also promote the fluidity of the mixture, further optimize the coating effect, and improve the density of the product at the microscopic level. Manual inspection and vibration operations provide supplementary means for vacuum degassing, further ensuring that there are no residual bubbles inside the mixture. The mixture is heated to an appropriate temperature and kept constant to provide the best thermal environment for the curing reaction. This temperature control operation increases the reaction rate while avoiding incomplete curing or performance degradation caused by too high or too low temperature, thereby improving the overall performance of the adhesive. The uniform coating of the adhesive ensures full contact between the substrate surface and the adhesive, laying the foundation for bonding performance. The setting of the coating pressure ensures full fit between the adhesive and the substrate, avoiding bonding defects caused by insufficient local pressure. The pressurization operation eliminates all gaps between the substrate surface and the adhesive, ensuring the continuity and consistency of the bonding surface. This operation improves the bonding performance, avoids weak areas caused by gaps, improves the impact resistance and long-term stability of the product, and the low-temperature curing process optimizes the molecular structure of the adhesive, forming a high-density cross-linked network, while accelerating the construction cycle. Adjusting the ambient temperature ensures the adaptability of the material under specific working conditions, such as application requirements in low-temperature areas, and enhances the reliability of the product in extreme environments. The encapsulation step after curing protects the surface of the material from contamination or damage from the external environment, ensuring the integrity of the product during transportation and storage. It is transported to the palletizing area through standardized transmission methods, ensuring the efficiency of batch processing of the product. Standardized processes reduce the risk of damage caused by manual intervention, improve the efficiency of production and logistics links, and create convenient conditions for subsequent distribution and use.

[0123] Reference Figure 1 The packaged mixture is transported to the palletizing area by transmission, specifically including:

[0124] The encapsulated mixture is recorded as a finished product. The finished product forms a quadrangular prism structure after encapsulation. The longest edge length in the quadrangular prism structure is regarded as the long side of the finished product, the shortest edge length is regarded as the thickness of the finished product, and the other edge lengths are regarded as the short sides of the finished product.

[0125] Get a rectangular metal plate;

[0126] Get three conveyor belts and name them as conveyor belt No. 1, conveyor belt No. 2 and conveyor belt No. 3 respectively. The width of conveyor belt No. 3 = the width of conveyor belt No. 2 + the length of the long side of the finished product.

[0127] Set height 1 and height 2, where height 1>height 2;

[0128] Set conveyor belt No. 1 parallel to the horizontal plane at height 1;

[0129] Set the No. 2 conveyor belt parallel to the horizontal plane at height 2, so that the short side of the No. 1 conveyor belt is parallel to the long side of the No. 2 conveyor belt, and the vertical projection planes of the No. 1 conveyor belt and the No. 2 conveyor belt on the horizontal plane do not intersect;

[0130] Project conveyor belt No. 1 and conveyor belt No. 2 onto the horizontal plane, compare the distances between the short side of conveyor belt No. 1 and the long side of conveyor belt No. 2, and obtain the pair of short sides and long sides with the shortest distance, which are recorded as the first connection end of conveyor belt No. 1 and the first connection end of conveyor belt No. 2, respectively.

[0131] By clarifying the geometric shape and definition of each side of the finished product, it is helpful to standardize the appearance and size description of the product, and facilitate the design and implementation of subsequent transmission and palletizing. Dividing the edges into long sides, short sides and thickness facilitates the parameter setting of the production line and transmission equipment, and improves the adaptability and operating efficiency of the finished product in different processes. The number and size requirements of the conveyor belts are clarified to ensure the integrity and uniformity of the transmission system. The special design of the width of the No. 3 conveyor belt adapts to the long side size of the finished product, meets the stable placement requirements of the finished product during the transmission process, and improves the compatibility and reliability of the transmission system. Setting height 1 and height 2 as different levels provides a basis for the layout of multi-layer conveyor belts, so that the transmission path can be staggered up and down, thereby saving space and optimizing the overall layout design. At the same time, the height difference design facilitates the gravity-assisted transfer of finished products and reduces the energy consumption of the transmission system. The No. 1 conveyor belt is arranged horizontally at a higher height 1 to ensure its stability in the initial stage of transmission. The setting of height 1 provides sufficient operating space, which is conducive to the effective connection with other conveyor belts in the future, while reducing the risk of interference in mechanical transmission and ensuring smooth operation. The arrangement of the No. 2 conveyor belt at height 2 forms a high-low staggered layer, and its parallel relationship with the No. 1 conveyor belt ensures the continuity of the transmission path. The parallel setting of the short side and the long side simplifies the design of the transmission connection, and the non-intersecting projection surfaces avoid path conflicts, provide a clear material flow direction, and reduce interference in system operation. Conveyor belts No. 1 and No. 2 are set at different heights, with the position of conveyor belt No. 1 higher than that of conveyor belt No. 2, which is conducive to forming a height difference, and the projections of conveyor belts No. 1 and No. 2 on the horizontal plane do not intersect, so that an inclined plane will be formed when conveyor belts No. 1 and No. 2 are connected, so that the items are transported by conveyor belt No. 1 and slide onto conveyor belt No. 2 through the inclined plane.

[0132] Reference Figure 1 The packaged mixture is transported to the palletizing area by transmission, specifically including:

[0133] Obtain any edge of the metal plate as the first edge of the metal plate, and obtain an edge parallel to the first edge as the second edge of the metal plate;

[0134] Place the metal edge No. 1 close to the No. 1 connection end of the No. 1 conveyor belt, so that the distance between the metal edge No. 1 and the No. 1 connection end of the No. 1 conveyor belt is less than 2 cm;

[0135] The forward transport direction of conveyor belt No. 2 is recorded as left, and the reverse transport direction is recorded as right;

[0136] Place the second side of the metal plate close to the first connection end of the second conveyor belt, so that the distance between the second side of the metal and the first connection end of the second conveyor belt is less than 2cm, and extend the short side of the left side of the second conveyor belt to intersect with the second side of the metal plate. The distance between the intersection and the adjacent side of the second side of the metal plate is the length of the short side of the finished product.

[0137] Obtain two parallel sides of the metal plate perpendicular to the long side of the No. 2 conveyor belt, and record them as the No. 3 side of the metal plate and the No. 4 side of the metal plate respectively;

[0138] Obtain the midpoints of the third side and the fourth side of the metal plate respectively, connect the two midpoints, and record the connecting line as the blocking projection line;

[0139] Get the thickness value of the finished product;

[0140] A cylindrical blocking rod parallel to the blocking projection line is arranged above the blocking projection line, and the distance between the cylindrical blocking rod and the blocking projection line is greater than the thickness of the finished product and less than the short side length of the finished product;

[0141] The third side and the fourth side of the metal plate are extended to intersect with the extended sides of the two long sides of the No. 2 conveyor belt. The area between the intersections on the No. 2 conveyor belt is recorded as the effective area, and the area to the right of the effective area is recorded as the buffer area. The buffer area is used to prevent the transported finished products from falling when the No. 2 conveyor belt is transported in the reverse direction.

[0142] By defining the first and second sides of the metal plate, the boundary reference of the metal plate is clarified, providing a clear basis for subsequent operations. The boundary definition facilitates the design and description of the relative position relationship between the metal plate and the conveyor belt. The first side of the metal is close to the connection end of the conveyor belt and the spacing is maintained at less than 2 cm, ensuring the precise docking between the metal plate and the conveyor belt, reducing the possibility of deviation during material transmission. Fine spacing control can improve the transmission stability and safety of the finished product and reduce errors. The transportation direction of the second conveyor belt is clarified, and the unified direction naming provides a clear reference standard for the subsequent regional division and function definition. By adjusting the position and intersection definition of the second side of the metal plate, the metal plate and the conveyor belt can be docked with high precision, and the position relationship is optimized based on the short side length of the finished product. This layout improves the accuracy of the transmission system, helps stabilize the delivery process of the finished product, and reduces the possibility of material misalignment. The third and fourth sides of the metal plate are defined, and by clarifying their relationship with the long side of the second conveyor belt, it provides a key reference for the subsequent blocking line setting. The midpoints of the metal plates are connected to form a blocking projection line, which provides a baseline for the physical blocking design of the finished product. Through the symmetrical positioning of the midpoint, the blocking projection line can accurately cover the key area to ensure that the finished product is correctly guided or blocked during the transmission process. The thickness value of the finished product is measured to provide the necessary parameter basis for the subsequent baffle setting. The thickness data enables the baffle height design to accurately match the characteristics of the finished product, thereby effectively avoiding the situation where the baffle is too high and causes failure, or too low to hinder normal transmission. The cylindrical baffle is set near the blocking projection line, and its position range is clarified, so that it does not affect the passage of the finished product and can effectively prevent the finished product from leaving the track. Reasonable spacing design ensures the smoothness and safety of transmission, while avoiding operational failures caused by improper distance. This can prevent the stacking of finished products from sliding onto the No. 2 conveyor belt. The setting of the buffer area provides additional safety space for reverse transportation to prevent the finished product from falling due to inertia, which helps to reduce the product damage rate and improve the operational stability and reliability of the production line.

[0143] Reference Figure 1 The packaged mixture is transported to the palletizing area by transmission, specifically including:

[0144] Get a vertex of the short side of the No. 3 conveyor belt and record it as point A, and another vertex as point C. Find a point on the short side and record it as point B, so that the distance from point B to point A is equal to the length of the short side of the No. 2 conveyor belt;

[0145] Set conveyor belt No. 3 parallel to the horizontal plane at height two, so that the distance between one short side of conveyor belt No. 3 and one short side of conveyor belt No. 2 is less than two centimeters, and conveyor belt No. 3 is on the left side of conveyor belt No. 2, wherein point A and point B are respectively on the extension lines of the two long sides of conveyor belt No. 2, and the projection of point C on the horizontal plane is on the projection plane of the metal plate on the horizontal plane.

[0146] This step ensures that the arrangement of conveyor belt 3 forms a specific spatial relationship with conveyor belt 2 by defining points A, B, and C and setting the distance between point B and point A. In this way, by positioning point B, the short lengths of conveyor belt 3 and conveyor belt 2 are aligned with each other, which facilitates subsequent connection and makes product conveying smoother. Conveyor belt 3 is set to be less than two centimeters away from conveyor belt 2 and set parallel in the horizontal plane to meet specific height and position requirements. This setting ensures the precise positioning of conveyor belt 3 on the left side of conveyor belt 2, allowing the finished product to seamlessly transition from conveyor belt 2 to conveyor belt 3, while reducing the possibility of product sliding or tilting due to height differences. The spatial positioning of conveyor belt 3 is coordinated with the metal plate by aligning the horizontal plane projection of point C with the projection plane of the metal plate. This layout provides additional support for the finished product when it moves to conveyor belt 3, reducing the risk of possible falls and helping to improve the stability of the overall conveyor system.

[0147] Reference Figure 1 The packaged mixture is transported to the palletizing area by transmission, specifically including:

[0148] Get the longest side length of the finished product and record it as the blocking side;

[0149] Obtain the shortest side of the finished product, which is recorded as the pass side, and the length of the shortest side is greater than the thickness value of the finished product;

[0150] Obtain a cylindrical blocking rod;

[0151] Get the radius of the cylindrical blocking rod;

[0152] Find a point on the metal plate as the reference point, and draw a perpendicular line from the reference point to the No. 3 conveyor belt, so that the length of the passing side + the radius of the cylindrical blocking stem < the length of the perpendicular line < the length of the blocking side;

[0153] A cylindrical blocking rod is set on the metal plate as a finished blocking rod, so that the center of the bottom surface of the cylindrical blocking rod coincides with the reference point, and the blocking rod is parallel to the short side of the No. 3 conveyor belt; and a force sensor is set on the blocking rod.

[0154] Determining the longest side length of the finished product and recording it as the blocking side helps to set the key dimensions that may block the movement of the finished product during the transmission process, facilitates the effective layout of the blocking device and the relevant conveyor belt position in the subsequent steps, defines the shortest side as the pass side, and ensures that the pass side length is greater than the thickness of the finished product, which is conducive to the subsequent setting of a suitable transmission path. By clarifying the relationship between the pass side and the thickness, the finished product can maintain a reasonable passing space when encountering the blocking rod, preventing the transmission jam caused by insufficient thickness or improper size matching, thereby improving the transmission stability and overall efficiency. Determining the radius of the blocking rod provides a dimensional basis for reasonably setting the distance relationship between the conveyor belt and the blocking device. Obtaining the radius value ensures that enough space can be reserved when designing the blocking system, determining the reference point on the metal plate and setting the vertical line length range to ensure that the passing path and space of the finished product on the conveyor belt meet the requirements. The setting of the reference point and the vertical line length limit enable the blocking device of the conveying system to be accurately adjusted, effectively avoiding the jamming or accumulation of finished products by limiting the passing area, thereby improving the overall smoothness and reliability of the system. Aligning the center of the bottom of the blocking bar with the reference point and making it parallel to the short side of the No. 3 conveyor ensures the optimal physical position and orientation of the blocking bar, allowing the finished products to pass smoothly or be intercepted. This parallel setting makes the product control of the conveying system more precise, helps guide the movement trajectory of the finished products, and provides a physical basis for detection and diversion. Installing a force sensor on the blocking bar can monitor the contact force between the finished product and the blocking bar in real time and provide feedback data for the conveyor control system. By setting the blocking bar and designing the position of the blocking bar, it can be ensured that the finished products are all transported with the short side in the direction of transportation when transported through the No. 3 conveyor, ensuring the consistency of the direction of the finished products in transportation.

[0155] The packaged mixture is transported to the palletizing area by transmission, specifically comprising:

[0156] Start the No. 1 conveyor belt to transport forward, and transport the finished products on the No. 1 conveyor belt to the metal plate. When the finished products on the metal plate are overlapped, the overlapping finished products are separated from each other through the blocking rod on the metal plate, so that all the finished products falling on the No. 2 conveyor belt are single finished products;

[0157] Set the transport time threshold of conveyor belt No. 1;

[0158] Set the transport stop time threshold of conveyor belt No. 1;

[0159] When the time that conveyor belt No. 1 starts to transport = the transport time threshold of conveyor belt No. 1, the transport of conveyor belt No. 1 is stopped; when the time that the transport is stopped = the transport stop time threshold of conveyor belt No. 1, conveyor belt No. 1 is started again for transport;

[0160] When a finished product slides onto the No. 2 conveyor belt, the No. 2 conveyor belt is started for forward transportation and transported to the No. 3 conveyor belt. When a finished product is transported to the No. 3 conveyor belt, the No. 3 conveyor belt is started for forward transportation.

[0161] Set the maximum force threshold of the blocking rod;

[0162] When the finished product is transported to the No. 3 conveyor belt, obtain the force value exerted on the blocking rod;

[0163] If the force value on the blocking rod is less than or equal to the maximum force threshold of the blocking rod, continue to transport the finished product;

[0164] If the force value on the blocking rod is greater than the maximum force threshold of the blocking rod, the transport direction of the second transmission is adjusted to reverse transport;

[0165] The force value of the blocking rod is obtained in real time. When the force value of the blocking rod is less than or equal to the maximum force threshold of the blocking rod, the transport direction of the No. 2 conveyor belt is adjusted to forward transport.

[0166] The finished products are adjusted to a uniform direction by the No. 3 conveyor belt and transported to the palletizing area.

[0167] Start conveyor belt No. 1 to transfer the finished products to the metal plate, and use the blocking rod to separate the stacked finished products, which can effectively separate and organize the finished products and ensure that the finished products that fall on conveyor belt No. 2 are single individuals. This processing method improves the accuracy of subsequent transportation and palletizing, prevents transportation deviation, jamming or equipment wear caused by stacking, and simplifies subsequent operation procedures. By setting the transportation time threshold, the working cycle of conveyor belt No. 1 can be accurately controlled to avoid excessive accumulation of finished products on the side of the metal plate close to conveyor belt No. 1. Set a time threshold for the stop interval of conveyor belt No. 1 to ensure that the accumulation of finished products on the metal plate during the stop period is reduced, and the accumulation of finished products on conveyor belt No. 2 is also reduced. The linkage design of conveyor belts No. 2 and 3 ensures the continuity of the transportation process of finished products. When the finished product enters the No. 2 conveyor belt, the system automatically starts the conveyor belt for transportation, avoiding the inefficiency caused by manual operation, and realizing the automated management of the entire process, improving the overall work efficiency and operation stability, and setting the maximum force threshold for the blocking rod. In this way, it can be judged whether the blocked finished product can be changed in transportation posture through the force condition of the blocking rod. If the force value of the blocking rod is ≦the maximum force threshold of the blocking rod, it means that the blocked finished product can be changed in transportation posture through the blocking rod. When the force of the blocking rod exceeds the standard, it means that the blocked finished product is in the process of changing its transportation posture. In the process, there is a finished product on the right side of the blocked finished product that prevents the blocked finished product from changing its transportation posture. The No. 2 conveyor belt is automatically adjusted to reverse transportation, so that the blocked finished product can be moved to the right, creating space for the finished product that needs to change its transportation posture to flow out, so that the changed finished product can complete the change of transportation posture. The force value of the blocking rod is obtained in real time. When the force value of the blocking rod is ≦ the maximum force threshold of the blocking rod, the transportation direction of the No. 2 conveyor belt is adjusted to forward transportation. The real-time monitoring of the force on the blocking rod is combined with the dynamic adjustment of the direction of the No. 2 conveyor belt, which can restore normal transportation in the shortest time. This intelligent feedback mechanism reduces the need for manual intervention, improves the response speed and automation level of the production line, and ensures the efficiency and safety of transportation. The No. 3 conveyor belt realizes the function of adjusting the direction of finished products, ensuring that all finished products enter the stacking area in a unified direction, which is convenient for subsequent stacking operations.

[0168] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0169] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing a high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials, characterized in that: include: The epoxy adhesive comprises an epoxy resin component and a curing agent component; The epoxy resin component comprises 80% to 94.5% by weight of an epoxy resin containing a long-chain hydrocarbon group and a polyurethane group; The epoxy resin component further comprises 5% to 19.5% by weight of a low-viscosity flexible epoxy resin, wherein the epoxy equivalent of the low-viscosity flexible epoxy resin is 300 g / eq to 600 g / eq; The epoxy resin component further comprises 0.5% to 1% of coupling agent a by weight percentage; The curing agent component comprises, by weight percentage: 80% to 90% of polythiol, 1% to 5% of monoalcohol amine, 5% to 15% of tertiary amine urea, 0.5% to 1% of coupling agent b and 0.1% to 1% of defoaming agent; The coupling agent a is a weakly acidic epoxy silane coupling agent, and the coupling agent b is a strongly acidic amino silane coupling agent; The polythiol is a polythiol having three or four thiol groups at the end; The monoalcoholamine is one of ethanolamine, 3-propanolamine, isopropanolamine, 2-amino-1-butanol or isobutanolamine; The structural formula of the tertiary amine urea is [R2NXNH]2CO], wherein: X is a C2-C3 alkyl chain, and R is a C1-C2 alkyl chain; The epoxy resin combination and the curing agent component are prepared.

2. The method for preparing a high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials according to claim 1, characterized in that: The preparation of the epoxy resin combination and the curing agent component specifically includes: Preparation of epoxy resin component: under a protective gas atmosphere, add epoxy resin containing long-chain hydrocarbon group and polyurethane group and low-viscosity flexible epoxy resin according to a proportion, set the temperature to 45°C to 65°C, mix and stir until soaked, add coupling agent a and stir and mix evenly, evacuate to remove bubbles, and obtain epoxy resin component; Preparation of curing agent component: under the atmosphere of protective gas, add polythiol, monoolamine and tertiary amine urea, set the temperature to 25°C to 45°C, stir and mix evenly, add coupling agent b and defoamer and stir and mix evenly, then vacuum and remove bubbles to obtain curing agent component; The high-toughness, low-temperature, fast-curing epoxy adhesive is prepared through the preparation process of the high-toughness, low-temperature, fast-curing epoxy adhesive.

3. The method for preparing a high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials according to claim 2, characterized in that: The high-toughness, low-temperature, fast-curing epoxy adhesive is prepared by the preparation process of the high-toughness, low-temperature, fast-curing epoxy adhesive, specifically comprising: The working area for preparing the high-toughness, low-temperature, fast-curing epoxy adhesive is placed in a protective gas environment, wherein the protective gas is specifically an inert gas, and nitrogen is selected as the protective gas in the preparation process; Weigh the prepared epoxy resin component and curing agent component respectively so that the weight ratio of the epoxy resin component to the curing agent component is 1.5:1; The weighed epoxy resin component and the curing agent component are placed in different clean containers, wherein the clean container has no impurities attached to the container wall; Place the containers containing the epoxy resin component and the curing agent component in an environment of 25°C to 35°C respectively; After the container containing the epoxy resin component and the curing agent component is placed in an environment of 25°C to 35°C for 15 minutes, the curing agent component is poured into the epoxy resin component container, and the mixed epoxy resin component and curing agent component are recorded as a mixture; Continue stirring the mixture for 3 to 5 minutes; Place the mixture into a vacuum device, adjust the vacuum device to -0.08 to -0.1 MPa, and evacuate for 2 to 3 minutes; Check the mixture for bubbles. If present, shake the container to remove them. Heat the mixture to 35°C to 45°C and keep the temperature constant; Apply the treated epoxy adhesive to the surface of the substrate to be bonded; Set coating pressure; After coating, pressurize to the set coating pressure so that there is no gap between the substrate surface and the mixture; The ambient temperature is adjusted to -5°C to 10°C, and the coated mixture is placed at the ambient temperature for 2 hours to complete curing; Packaging the cured mixture; The packaged mixture is transported to the palletizing area by conveyor.

4. The method for preparing a high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials according to claim 3, characterized in that: The packaged mixture is transported to the palletizing area by transmission, specifically comprising: The encapsulated mixture is recorded as a finished product. The finished product forms a quadrangular prism structure after encapsulation. The longest edge length in the quadrangular prism structure is regarded as the long side of the finished product, the shortest edge length is regarded as the thickness of the finished product, and the other edge lengths are regarded as the short sides of the finished product. Get a rectangular metal plate; Get three conveyor belts and name them as conveyor belt No. 1, conveyor belt No. 2 and conveyor belt No. 3 respectively. The width of conveyor belt No. 3 = the width of conveyor belt No. 2 + the length of the long side of the finished product. Set height 1 and height 2, where height 1>height 2; Set conveyor belt No. 1 parallel to the horizontal plane at height 1; Set the No. 2 conveyor belt parallel to the horizontal plane at height 2, so that the short side of the No. 1 conveyor belt is parallel to the long side of the No. 2 conveyor belt, and the vertical projection planes of the No. 1 conveyor belt and the No. 2 conveyor belt on the horizontal plane do not intersect; Project conveyor belt No. 1 and conveyor belt No. 2 onto the horizontal plane, compare the distances between the short side of conveyor belt No. 1 and the long side of conveyor belt No. 2, and obtain the pair of short sides and long sides with the shortest distance, which are recorded as the first connection end of conveyor belt No. 1 and the first connection end of conveyor belt No. 2, respectively.

5. The method for preparing a high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials according to claim 4, characterized in that: The packaged mixture is transported to the palletizing area by transmission, specifically comprising: Obtain any edge of the metal plate as the first edge of the metal plate, and obtain an edge parallel to the first edge as the second edge of the metal plate; Place the metal edge No. 1 close to the No. 1 connection end of the No. 1 conveyor belt, so that the distance between the metal edge No. 1 and the No. 1 connection end of the No. 1 conveyor belt is less than 2 cm; The forward transport direction of conveyor belt No. 2 is recorded as left, and the reverse transport direction is recorded as right; Place the second side of the metal plate close to the first connection end of the second conveyor belt, so that the distance between the second side of the metal and the first connection end of the second conveyor belt is less than 2cm, and extend the short side of the left side of the second conveyor belt to intersect with the second side of the metal plate. The distance between the intersection and the adjacent side of the second side of the metal plate is the length of the short side of the finished product. Obtain two parallel sides of the metal plate perpendicular to the long side of the No. 2 conveyor belt, and record them as the No. 3 side of the metal plate and the No. 4 side of the metal plate respectively; Obtain the midpoints of the third side and the fourth side of the metal plate respectively, connect the two midpoints, and record the connecting line as the blocking projection line; Get the thickness value of the finished product; A cylindrical blocking rod parallel to the blocking projection line is arranged above the blocking projection line, and the distance between the cylindrical blocking rod and the blocking projection line is greater than the thickness of the finished product and less than the short side length of the finished product; The third side and the fourth side of the metal plate are extended to intersect with the extended sides of the two long sides of the No. 2 conveyor belt. The area between the intersections on the No. 2 conveyor belt is recorded as the effective area, and the area to the right of the effective area is recorded as the buffer area. The buffer area is used to prevent the transported finished products from falling when the No. 2 conveyor belt is transported in the reverse direction.

6. The method for preparing a high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials according to claim 5, characterized in that: The packaged mixture is transported to the palletizing area by transmission, specifically comprising: Get a vertex of the short side of the No. 3 conveyor belt and record it as point A, and another vertex as point C. Find a point on the short side and record it as point B, so that the distance from point B to point A is equal to the length of the short side of the No. 2 conveyor belt; Set conveyor belt No. 3 parallel to the horizontal plane at height two, so that the distance between one short side of conveyor belt No. 3 and one short side of conveyor belt No. 2 is less than two centimeters, and conveyor belt No. 3 is on the left side of conveyor belt No. 2, wherein point A and point B are respectively on the extension lines of the two long sides of conveyor belt No. 2, and the projection of point C on the horizontal plane is on the projection plane of the metal plate on the horizontal plane.

7. The method for preparing a high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials according to claim 6, characterized in that: The packaged mixture is transported to the palletizing area by transmission, specifically comprising: Get the longest side length of the finished product and record it as the blocking side; Obtain the shortest side of the finished product, which is recorded as the pass side, and the length of the shortest side is greater than the thickness value of the finished product; Obtain a cylindrical blocking rod; Get the radius of the cylindrical blocking rod; Find a point on the metal plate as the reference point, and draw a perpendicular line from the reference point to the No. 3 conveyor belt, so that the length of the passing side + the radius of the cylindrical blocking stem < the length of the perpendicular line < the length of the blocking side; A cylindrical blocking rod is set on the metal plate as a finished blocking rod, so that the center of the bottom surface of the cylindrical blocking rod coincides with the reference point, and the blocking rod is parallel to the short side of the No. 3 conveyor belt; and a force sensor is set on the blocking rod.

8. The method for preparing a high-toughness, low-temperature, fast-curing epoxy adhesive for bonding inert materials according to claim 7, characterized in that: The packaged mixture is transported to the palletizing area by transmission, specifically comprising: Start the No. 1 conveyor belt to transport forward, and transport the finished products on the No. 1 conveyor belt to the metal plate. When the finished products on the metal plate are overlapped, the overlapping finished products are separated from each other through the blocking rod on the metal plate, so that all the finished products falling on the No. 2 conveyor belt are single finished products; Set the transport time threshold of conveyor belt No. 1; Set the transport stop time threshold of conveyor belt No. 1; When the time that conveyor belt No. 1 starts to transport = the transport time threshold of conveyor belt No. 1, the transport of conveyor belt No. 1 is stopped; when the time that the transport is stopped = the transport stop time threshold of conveyor belt No. 1, conveyor belt No. 1 is started again for transport; When a finished product slides onto the No. 2 conveyor belt, the No. 2 conveyor belt is started for forward transportation and transported to the No. 3 conveyor belt. When a finished product is transported to the No. 3 conveyor belt, the No. 3 conveyor belt is started for forward transportation. Set the maximum force threshold of the blocking rod; When the finished product is transported to the No. 3 conveyor belt, obtain the force value exerted on the blocking rod; If the force value on the blocking rod is less than or equal to the maximum force threshold of the blocking rod, continue to transport the finished product; If the force value on the blocking rod is greater than the maximum force threshold of the blocking rod, the transport direction of the second transmission is adjusted to reverse transport; The force value of the blocking rod is obtained in real time. When the force value of the blocking rod is less than or equal to the maximum force threshold of the blocking rod, the transport direction of the No. 2 conveyor belt is adjusted to forward transport. The finished products are adjusted to a uniform direction by the No. 3 conveyor belt and transported to the palletizing area.

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