Aramid cord conveyor belt and its preparation method and application

Abstract

The present application relates to the technical field of high-performance composite materials and automation equipment, in particular to an aramid rope core conveyor belt and a preparation method and application thereof. The aramid rope core conveyor belt has an asymmetric functional composite structure, including a core skeleton layer composed of aramid fiber ropes, and a covering layer firmly combined through interface enhancement technology. The covering layer is divided into a working surface rubber layer and a driving surface rubber layer: the working surface rubber layer adopts a fluorosilicone rubber matrix, integrating a clean antistatic system and a high wear-resistant self-lubricating system; the driving surface rubber layer adopts a hydrogenated nitrile rubber matrix and contains a reactive tackifying component to provide high friction and excellent interface bonding force. The present application realizes the grafting and interpenetrating network combination between different polar rubber layers through a unified peroxide vulcanization system and a co-crosslinking agent. The present application also discloses the application of the conveyor belt in new energy automobile manufacturing, solving the comprehensive problems of conveying precision, static protection, surface non-damage and structural durability.

Description

Technical Field

[0001] This invention relates to the field of high-performance composite materials and automated equipment technology, specifically to aramid rope core conveyor belts, their preparation methods, and applications. Background Technology

[0002] As the "heart" of new energy vehicles, power batteries (especially square aluminum-cased batteries) require a high-speed, high-precision post-processing stage in automated production workshops. This includes OCV / IR testing, dimensional and appearance inspection (AOI), barcode reading, sorting and grouping, and finally loading the cells onto the module assembly line. In this process, the cell transport and handling is a critical bottleneck ensuring product quality and production cycle time. Existing transport technologies generally suffer from the following problems:

[0003] In pursuit of production efficiency, modern battery factories have entered the "second" era in single-line cycle times (e.g., processing one cell every 1.5 to 2 seconds), with conveyor speeds reaching 60 to 90 meters per minute. Under these high-speed, high-frequency start-stop conditions, the inherent elastic deformation and creep problems of widely used traditional polyurethane (PU), polyvinyl chloride (PVC), or rubber flat belts are dramatically amplified. When a servo motor drives the belt for precise positioning, the belt's elastic elongation causes the actual position of the cell to lag behind its theoretical position, generating dynamic errors; while creep causes a slow drift of the positioning reference, resulting in cumulative errors. This reduces the success rate of processes that rely on precise positioning, such as AOI inspection, laser marking, and robotic gripping. The system must then incorporate expensive and complex vision-based secondary positioning systems for compensation, increasing not only costs and cycle time but also introducing new points of failure.

[0004] Power battery cells, especially semi-finished products, are extremely sensitive to static electricity. Electrostatic discharge can break down the microstructure inside the cell, causing difficult-to-detect internal short circuits and seriously threatening the long-term safety of the battery. Meanwhile, production workshops are typically high-level cleanrooms with strict controls on particulate contamination. Existing conveyor belt solutions face a dilemma in this regard:

[0005] To meet the antistatic requirements (surface resistivity less than 10 Ω·cm) 9 (Ohm), traditional rubber tapes typically contain a large amount of conductive carbon black. However, carbon black is prone to particle shedding during long-term friction, becoming foreign matter in cleanrooms and contaminating the surface of battery cells and high-precision equipment.

[0006] Some seemingly clean PU or silicone materials rely on easily migrating and deteriorating surface coatings or small molecule additives for their antistatic properties. Under harsh temperature and humidity control and chemical cleaning environments, their antistatic effect will decay or even fail over time, bringing unpredictable electrostatic discharge risks.

[0007] The aluminum casing surface of the square battery cell, especially the top cover safety valve designed for pressure relief, must be absolutely free of any scratches, dents, or impacts. However, in order to achieve reliable positioning and clamping at high speeds, existing solutions often compromise on certain aspects:

[0008] Damage risk of rigid chain plates or edge blocks: Although engineering plastic (such as polyoxymethylene POM) chain plates or rigid positioning blocks are wear-resistant and have good positioning rigidity, their hard-hard contact with the aluminum shell is very easy to produce permanent scratches under high-speed movement and positioning impact, which will directly scrap the battery cell.

[0009] Durability and pollution issues of flexible materials: Although using soft belts or attaching cushioning materials to hard edges can protect the battery cells, these soft materials are usually not wear-resistant. Under long-term high-speed friction with the sides of the battery cells, they will wear down, fray, and age, becoming new sources of pollution themselves.

[0010] Battery technology is iterating rapidly, with frequent changes in cell size and specifications. Most existing production lines use rigid clamps and fixed edges designed for specific cell sizes. When switching to produce different cell models, the entire line must be shut down, requiring technicians to spend hours or even a whole day manually disassembling, replacing, and readjusting hundreds or even thousands of positioning mechanisms. This inefficiency has become a major obstacle to battery factories' ability to respond to market changes and conduct mixed-product production.

[0011] Conveyor belts rely on high friction between their drive surface and the drive wheel to achieve precise, slip-free transmission. Simultaneously, their working surface needs extremely low friction with the conveyed material (such as battery cells) to prevent scratches. Traditional, homogeneous conveyor belt materials cannot simultaneously meet these two completely contradictory performance requirements, forcing a compromise that is less than ideal. This fundamentally limits the upper limit of conveyor system performance.

[0012] In summary, while existing technologies may partially address the problem from a single dimension, they cannot provide an integrated solution that simultaneously satisfies the five core requirements of "high flexibility" and resolves the conflict between "drive and load-bearing performance." There is an urgent need in this field for a technology that involves systematic innovation from material sources to structural design. Summary of the Invention

[0013] In view of the shortcomings of the prior art, the purpose of this invention is to provide an aramid cord core conveyor belt. By designing the structural partitions of the conveyor belt and precisely matching the chemical composition of the cover layer, the fundamental contradiction of existing conveyor belts being unable to simultaneously meet the requirements of "high cleanliness, high lubrication, and antistatic" working surfaces and "high friction and high reliability" driving surfaces is fundamentally solved.

[0014] Another objective of this invention is to provide a method for preparing an aramid rope core conveyor belt, which ensures the achievement of its good performance through refined process control.

[0015] The third objective of this invention is to provide an application of an aramid cord conveyor belt for a material handling device in the manufacture of new energy vehicles, namely a dual-belt cooperative mechanical system based on this conveyor belt. This system, through ingenious purely mechanical design, maximizes the material advantages of the conveyor belt, thereby achieving high-precision, high-cleanliness, and high-flexibility high-speed processing of power battery cells without the need for complex external sensors or control systems.

[0016] This invention is achieved using the following technical solution:

[0017] Aramid rope core conveyor belt, including:

[0018] The core skeleton layer contains multiple parallel aramid fiber ropes;

[0019] The covering layer, which covers the core skeleton layer, is formed by vulcanization of composite rubber.

[0020] The aramid rope core conveyor belt has an asymmetric functional composite structure, and the cover layer is divided into:

[0021] The working surface adhesive layer covers at least one surface of the core skeleton layer and is used to directly contact the conveyed material. The matrix of the working surface adhesive layer is fluorosilicone rubber, and its composite adhesive contains an antistatic system composed of carbon nanotubes and ionic liquids.

[0022] A drive surface adhesive layer, which covers the other surface of the core skeleton layer opposite to the working surface adhesive layer, is used to contact the drive system. The matrix of the drive surface adhesive layer is hydrogenated nitrile rubber and is designed to provide a higher coefficient of friction than the working surface adhesive layer.

[0023] Furthermore, the working surface adhesive layer and the driving surface adhesive layer are covalently bonded through a unified peroxide vulcanization system containing a co-crosslinking agent.

[0024] Specifically, the core innovation of aramid rope core conveyor belts lies in their asymmetrical functional structure.

[0025] The core skeleton layer is composed of multiple parallel aramid fiber ropes and undergoes high-temperature interface modification treatment to ensure a strong bond with the upper and lower adhesive layers.

[0026] The capping layer is no longer a single homogeneous material, but is divided into two functional layers:

[0027] Working surface adhesive layer: This is the layer that comes into direct contact with the material being transported (such as battery cells). The sole objective of its formulation design is to be material-friendly, therefore it must be designed to have a low coefficient of friction and antistatic properties.

[0028] Drive surface adhesive layer: This is the layer that contacts the drive and driven wheels. Its formulation is designed solely for machine friendliness, therefore its materials must be designed to provide a higher coefficient of friction than the working surface adhesive layer to ensure slip-free and precise transmission under any operating conditions.

[0029] This functional zoning in the structure is the cornerstone of the present invention in resolving all the contradictions in the background art.

[0030] The composite adhesive material of the working surface layer includes an antistatic system composed of carbon nanotubes and a high-temperature resistant hydrophobic ionic liquid. The electronic conductor is specifically carbon nanotubes (CNTs), rather than insulating boron nitride nanotubes (BNNTs). CNTs have excellent conductivity and a high aspect ratio, enabling them to form a highly efficient physically conductive framework in the matrix.

[0031] The ionic conductor is specifically defined as a high-temperature resistant hydrophobic ionic liquid. The requirement of "high-temperature resistant" ensures it can withstand post-curing processes above 200°C without decomposition; the requirement of "hydrophobic" prevents it from absorbing moisture in the operating environment, which would lead to performance degradation; and the requirement of a specific chemical type (such as pyrrolidine-onium / quaternary phosphonium cation + TFSI) further clarifies its suitability. - The anion is used to ensure that it does not interfere with the peroxide radical vulcanization process of FVMQ (fluorosilicone rubber) (to avoid polymerization inhibition).

[0032] The composite adhesive material of the working surface layer also includes a highly wear-resistant self-lubricating system composed of hexagonal boron nitride nanosheets and ultra-high molecular weight organosilicon additives. This highly wear-resistant self-lubricating system employs a synergistic mechanism of "ball bearings + oil film," and is composed of hexagonal boron nitride (h-BN) nanosheets and ultra-high molecular weight (UHMW) organosilicon additives. This gives its surface both the permanence of solid lubrication and the self-healing properties of liquid lubrication, thereby achieving an ultra-long service life without damaging the battery cell.

[0033] The matrix of the working surface adhesive layer is preferably fluorosilicone rubber (FVMQ) to meet the requirements of cleanliness and chemical resistance. The matrix of the driving surface adhesive layer is preferably hydrogenated nitrile butadiene rubber (HNBR) to provide high wear resistance and high friction performance. To solve the interfacial bonding problem of these two rubbers with different polarities, this invention specifically introduces a reactive tackifying component into the composite rubber compound of the driving surface adhesive layer. This is a necessary technical feature to achieve a firm bond between the two rubber layers and prevent delamination.

[0034] The aramid fiber rope undergoes a constant tension spreading and impregnation process during preparation, and its surface is modified with a high-temperature resistant interface treatment. This spreading and impregnation process solves the technological challenges associated with simply pursuing "low twist." By physically flattening the medium-twist (e.g., 40-60 twists / meter) aramid rope bundle into a flat strip before impregnation, both the cohesion of the fiber bundle during processing and the thorough wetting of each monofilament by the adhesive are ensured. The resulting core possesses both excellent mechanical properties and feasibility for industrial production.

[0035] The method for preparing the aramid rope core conveyor belt includes the following steps:

[0036] a) Perform an interfacial modification treatment on aramid fiber rope by spreading and impregnation;

[0037] b) Prepare two composite adhesives with different formulations for the working surface adhesive layer and the driving surface adhesive layer, respectively;

[0038] c) The aramid fiber rope treated in step a) is asymmetrically bonded with the two composite adhesives prepared in step b);

[0039] d) The bonded components from step c) are subjected to heat and pressure co-vulcanization.

[0040] Specifically, the formulation of the working surface rubber layer of the aramid rope core conveyor belt is shown in Table 1; the formulation of the driving surface rubber layer of the aramid rope core conveyor belt is shown in Table 2.

[0041] Table 1: Formulation of the working surface rubber layer of aramid cord conveyor belt

[0042]

[0043] Table 2: Formulation of the rubber layer for the drive surface of aramid cord conveyor belt

[0044]

[0045] Specifically, the preparation method of the aramid rope core conveyor belt includes the following steps:

[0046] Step 1: Pretreatment of high-dimensional stable aramid core

[0047] Raw material selection and yarn spreading: High-strength para-aramid rope with a twist of 40-60 twists / meter is selected. Before interface treatment, the aramid rope is passed through an ultrasonic yarn spreading device or a comb-shaped flattening expander to physically flatten it from a cylindrical rope bundle into a flat, uniformly thick ribbon-like fiber bundle.

[0048] Interface treatment (two-step method): Under constant pretension (50-100N), the flat fiber bundles are passed sequentially through two impregnation tanks:

[0049] Step 1 (Amination): Amino functional groups are grafted onto the surface of aramid fibers by passing them through a hydrolysis tank of aminosilane (such as KH-550) and drying them at 120-140℃.

[0050] Step 2 (vinylation): The surface is further grafted with vinyl functional groups that can be co-sulfurized with the working surface FVMQ by passing it through a solvent bath containing a special vinyl silane (such as A-151) and drying it at 70-90°C.

[0051] Step 2: Separate preparation of the two types of composite adhesives for the coating layer

[0052] Preparation of working surface rubber compound (grading process):

[0053] a. High-shear mixing: In an internal mixer, FVMQ raw rubber, fumed silica, processing aids, heat stabilizers and carbon nanotubes (CNTs) are thoroughly mixed and dispersed.

[0054] b. Low-shear mixing: On a low-temperature open mill, the above rubber compound is re-milled and gently mixed with hexagonal boron nitride nanosheets (h-BN), supported high-temperature resistant hydrophobic ionic liquid and ultra-high molecular weight organosilicon additive masterbatch by using a large roll gap and roll wrapping method.

[0055] c. Vulcanization: Finally, quickly mix in the vulcanizing agent and crosslinking agent, and then remove the film for later use.

[0056] Preparation of the driving surface adhesive:

[0057] a. Using a conventional internal mixer or open mill method, thoroughly mix HNBR raw rubber, HNBR-g-MAH, TAIC, high abrasion-resistant furnace black, zinc oxide, stearic acid, antioxidant, etc., and finally add vulcanizing agent, then sheet for later use.

[0058] Step 3: Asymmetric compounding, molding and vulcanization

[0059] Asymmetric bonding shaping:

[0060] a. Calender the two rubber compounds prepared in step two into sheets of the specified thickness.

[0061] b. In the mold, first lay the drive surface rubber sheet.

[0062] c. The flattened modified aramid cores treated in step one are tensioned and arranged on it at predetermined intervals.

[0063] d. Finally, cover the working surface with the adhesive sheet.

[0064] Co-vulcanization: The assembled semi-finished product is placed in a flat vulcanizing machine and subjected to constant pressure and temperature of 170-180℃ and 14-16MPa for 20-30 minutes for primary vulcanization. Under this temperature and pressure, two different rubber systems can complete the vulcanization reaction simultaneously, and a strong chemical bond is achieved through the interface-modified aramid core.

[0065] Post-processing: The vulcanized conveyor belt semi-finished product is subjected to a second vulcanization in an oven at 190-210℃ for 3-5 hours to improve the cross-linking network of FVMQ and remove low molecular weight substances. After cooling, the edges are trimmed to obtain the finished product.

[0066] The aforementioned aramid cord conveyor belt is used in an article handling device for new energy vehicle manufacturing. This device is mounted on a system frame and includes:

[0067] The main conveyor unit includes a main conveyor belt drive roller driven by a main conveyor servo motor, a main conveyor belt driven roller, and a main conveyor belt surrounding thereon;

[0068] A flexible clamping and positioning unit includes a clamping conveyor belt drive roller driven by a clamping conveyor servo motor, a clamping conveyor belt driven roller, and a clamping conveyor belt surrounding thereon. The unit is vertically mounted on one side of the main conveyor belt via a clamping unit vertical mounting bracket.

[0069] A synchronous drive system that uses electrical control to make the main conveying servo motor and the clamping conveying servo motor run synchronously.

[0070] The main conveyor belt and the clamping conveyor belt both use the aramid rope core conveyor belt, and the installation method is as follows: the working surface rubber layer of the aramid rope core conveyor belt faces the conveyed parts, and the driving surface rubber layer faces the respective driving rollers.

[0071] This is a material handling device used in the manufacturing of new energy vehicles. Its core mechanical structure is clearly defined as follows: a horizontal main conveying unit, a vertically arranged flexible clamping and positioning unit, and a dual-motor synchronous drive system that ensures strict speed synchronization between the two. The most crucial limitation is that the conveyor belt used in this device must be the asymmetrical conveyor belt of this invention, and the installation method must be functionally matched, i.e., "the working surface rubber layer faces the parts, and the driving surface rubber layer faces the drive roller." This creates a unique and inevitable complementary relationship between the mechanical device and the conveyor belt product of this invention.

[0072] The device also includes an automatic spacing adjustment mechanism, which comprises a high-precision linear module base fixedly mounted on the system frame, a spacing adjustment servo motor, a ball screw, and a linear slider. The entire flexible clamping and positioning unit is mounted on the linear slider and, driven by the spacing adjustment servo motor, reciprocates linearly along the guide rail of the high-precision linear module base. This automatic spacing adjustment mechanism enables the device to quickly and automatically adapt to battery cells of different sizes, which is key to achieving "flexible manufacturing."

[0073] The high dimensional stability of the core skeleton layer of the aramid rope core conveyor belt, combined with the high coefficient of friction of the driving surface adhesive layer, is used to achieve open-loop high-precision positioning of the battery cell through the synchronous drive system.

[0074] The antistatic properties and highly lubricated, wear-resistant surface of the working surface rubber layer of the aramid cord conveyor belt are used to prevent electrostatic damage and surface scratches to the battery core during high-speed conveying and clamping.

[0075] The inherent properties of the core's "high dimensional stability" and the driving surface's "high coefficient of friction," combined with the mechanical "synchronous drive," enable ultra-high positioning accuracy without the need for complex sensor feedback (open-loop control). The unique inherent properties of the working surface's "antistatic properties" and "clean, wear-resistant surface" fundamentally ensure the safety of the battery cell during the dynamic process of high-speed clamping and conveying (free from electrostatic damage and surface scratches).

[0076] This invention changes the traditional design concept of homogeneous conveyor belts by innovatively dividing the conveyor belt into a working surface rubber layer and a driving surface rubber layer with completely different functions. This allows the two surfaces to use completely different material formulations, thereby achieving the two contradictory properties of "extremely friendly to materials (low friction, cleanliness, antistatic)" and "extremely friendly to machines (high friction, wear resistance)" on a single belt, fundamentally solving the core contradiction of the conveying system.

[0077] A novel approach combines the electronically conductive framework of carbon nanotubes (CNTs) with the ionic conductivity pathway of high-temperature resistant hydrophobic ionic liquids (ILs) to construct a non-migrating, non-shedding, and stable clean antistatic system. For the first time, the solid lubrication of hexagonal boron nitride (h-BN) nanosheets is combined with the dynamic surface film formation of ultra-high molecular weight (UHMW) silicone additives to obtain a self-lubricating surface exhibiting both extremely low friction coefficient and ultra-high wear resistance.

[0078] By employing a unique process of "medium twist + fiber spreading and impregnation," the challenge of industrial processing of "low-twist aramid core," despite its superior theoretical properties, has been overcome. This process maximizes the low elongation characteristics of aramid fibers while ensuring production feasibility, achieving high dimensional stability in the final product.

[0079] This invention selects FVMQ and HNBR as two asymmetric adhesive layers and overcomes the traditional bias that rubbers of different polarities cannot be directly and firmly bonded through the following synergistic interface enhancement technology, achieving high-strength interface bonding: both the working surface adhesive layer and the driving surface adhesive layer are vulcanized with peroxide. At the main vulcanization temperature of 170-180℃, the free radicals generated by the decomposition of both can simultaneously initiate the crosslinking of their respective rubber compounds and provide the necessary active sites for the interface reaction. In the HNBR formulation of the driving surface adhesive layer, maleic anhydride-grafted hydrogenated nitrile butadiene rubber (HNBR-g-MAH) is introduced. At the high vulcanization temperature, the maleic anhydride groups in HNBR-g-MAH can undergo ring-opening esterification / amidation reactions with the trace terminal hydroxyl groups present in the FVMQ working surface adhesive layer or the amino groups introduced through silane coupling agents, forming chemical covalent bonds at the interface, anchoring the two adhesive layers together like "molecular rivets". The co-crosslinking agent TAIC, added to the formulation of the driving adhesive layer, has three allyl functional groups that can participate in the free radical crosslinking of HNBR and also undergo copolymerization with the vinyl groups in FVMQ. At the interface where the two adhesive layers are tightly bonded, TAIC molecules can cross the interface and react with the molecular chains of both FVMQ and HNBR to form an interpenetrating network (IPN). This acts like high-strength molecular threads "stitching" the two interfaces together, greatly improving the toughness and peel resistance of the interface.

[0080] Compared with the prior art, the beneficial effects of the present invention are:

[0081] (1) Through the innovative asymmetric functional composite structure, the working surface and driving surface of the conveyor belt can adopt the most optimized and completely different material formulas, which effectively solves the fundamental contradiction that traditional homogeneous conveyor belts cannot simultaneously satisfy "material-friendly" and "machine-friendly".

[0082] (2) By adopting the aramid core process of "medium twist + filament spreading and impregnation", the elastic elongation and long-term creep of the conveyor belt are reduced by more than 30% compared with traditional aramid belts, enabling it to maintain sub-millimeter positioning accuracy under high-speed and high-frequency start-stop conditions, thus providing the possibility for high-cycle, visual-compensation-free automated conveying. The "CNT + ionic liquid" dual-mode conductive network fundamentally solves the two major problems of conductive particle shedding and contamination and antistatic agent migration failure in traditional antistatic solutions. Its surface resistivity can be stabilized at 10. 6 -10 8Ω fully meets the stringent production environment requirements of electrostatic-sensitive products such as power batteries. The "ball bearing + oil film" synergistic lubrication system gives the working surface an extremely low coefficient of friction and excellent wear resistance. Its flexible surface can effectively buffer impacts and avoid scratches when in contact with the aluminum shell of the battery cell; at the same time, it is extremely durable and will not fray or generate foreign matter due to long-term friction, ensuring a high degree of cleanliness in the production process.

[0083] (3) The excellent performance of the conveyor belt of this invention enables it to match innovative mechanical designs such as "dual belt collaboration". In application, it not only improves the precision and efficiency of battery cell processing to a new level, but also shortens the production line changeover time from several hours to less than 1 minute through automated changeover, which greatly improves the flexibility of the production line and its responsiveness to diversified market demands. Attached Figure Description

[0084] Figure 1 This is a front cross-sectional view of the article handling device used in the manufacturing of new energy vehicles in this invention.

[0085] Figure 2 This is a top view of the article handling device used in the manufacturing of new energy vehicles according to the present invention;

[0086] Figure 3 This is a side view of the article handling device used in the manufacturing of new energy vehicles according to the present invention;

[0087] Figure 4 This is a schematic diagram of the conveyor belt structure in this invention;

[0088] In the diagram: 1. Main conveyor belt drive roller; 2. Main conveyor belt driven roller; 3. Main conveyor belt; 4. Clamping conveyor belt drive roller; 5. Clamping conveyor belt driven roller; 6. Vertical mounting bracket for clamping unit; 7. Clamping conveyor belt; 8. Main conveyor servo motor; 9. Clamping conveyor servo motor; 10. High-precision linear module base; 11. Spacing adjustment servo motor; 12. Ball screw; 13. Linear slider; 14. System frame; 15. Working surface adhesive layer; 16. Drive surface adhesive layer; 17. Core skeleton layer. Detailed Implementation

[0089] To make the technical solution and the scope of protection of the claims of this invention clearer and more explicit, several key terms used in this application are defined as follows:

[0090] Working surface adhesive layer 15: In this invention, it specifically refers to the outer surface layer of the conveyor belt that comes into direct contact with the conveyed items (such as power battery cells, wafer carriers, etc.). Its core function is to protect the conveyed items and facilitate low-friction, clean, and electrostatic-free interaction with them. Therefore, the material formulation of this adhesive layer is specially designed to possess "material-friendly" properties such as low coefficient of friction, high wear resistance and self-lubrication, high cleanliness, and antistatic properties.

[0091] Drive surface adhesive layer 16: In this invention, it specifically refers to the inner surface layer where the conveyor belt comes into contact with drive system components such as the drive roller and driven roller. Its core function is to achieve efficient, precise, and slip-free power transmission. Therefore, the material formulation of this adhesive layer is specially designed to have a higher coefficient of friction and excellent wear resistance and durability than the working surface adhesive layer 15, in order to meet the performance requirements of "machine-friendly".

[0092] Asymmetric Functional Composite Structure: In this invention, this does not refer to geometric asymmetry, but rather to an overall, function-oriented structural feature. The structure comprises a core skeleton layer 17 that provides core support and dimensional stability, and an outer covering layer. Its "asymmetry" is explicitly manifested in the fact that the covering layer is further divided into the aforementioned "working surface adhesive layer 15" and "drive surface adhesive layer 16," which have distinctly different properties and material compositions. This structure, through partitioned design at the material science level, fundamentally resolves the performance contradiction between "working interaction" and "drive transmission" in traditional homogeneous conveyor belts, allowing the two surfaces of the conveyor belt to be independently optimized to simultaneously meet the dual, contradictory needs of being both material-friendly and machine-friendly.

[0093] To make the objectives and technical solutions of this invention clearer, the invention will be further described in detail below.

[0094] An article handling device for the manufacture of new energy vehicles includes the following structure:

[0095] For precise description, we define the following: the conveying direction as the X-axis, the horizontal width direction as the Y-axis, and the vertical direction as the Z-axis.

[0096] Basic structure and positioning relationship (refer to) Figures 1-3 ):

[0097] System rack 14 is the mounting reference for all components.

[0098] The main conveyor servo motor 8 is fixedly installed at one end of the system frame 14.

[0099] The rotation axes of the main conveyor belt drive roller 1 and the main conveyor belt driven roller 2 are both parallel to the Y-axis. They are fixedly mounted on the system frame 14, defining a horizontal conveying plane parallel to the XY plane.

[0100] The high-precision linear module base 10 is fixedly mounted across the system frame 14, with its guide rails strictly parallel to the Y-axis.

[0101] Installation and driving of main conveyor belt 3 (refer to) Figure 2 , Figure 4 ):

[0102] The main conveyor belt 3 is a closed-loop asymmetrical conveyor belt with its working surface rubber layer 15 facing upwards and its driving surface rubber layer 16 facing downwards, wrapping around the main conveyor belt drive roller 1 and the main conveyor belt driven roller 2. Between the working surface rubber layer 15 and the driving surface rubber layer 16 is the core skeleton layer 17.

[0103] The main conveyor servo motor 8 drives the main conveyor belt drive roller 1 to rotate around the Y-axis through a transmission mechanism such as a belt or gear.

[0104] Installation and driving of flexible clamping unit (refer to) Figures 1-3 ):

[0105] The vertical mounting bracket 6 of the clamping unit is securely fixed to the linear slider 13.

[0106] The rotation axes of the clamping conveyor belt drive roller 4 and the clamping conveyor belt driven roller 5 are both parallel to the Z-axis (vertical). They are mounted on the vertical mounting bracket 6 of the clamping unit, defining a vertical conveying plane parallel to the XZ plane.

[0107] The clamping conveyor belt 7 is a closed-loop asymmetric conveyor belt, with its working surface rubber layer 15 facing the main conveyor belt 3 (negative Y-axis direction) and its driving surface rubber layer 16 facing away from the main conveyor belt 3 (positive Y-axis direction).

[0108] The clamping and conveying servo motor 9 is integrated and mounted on the vertical mounting bracket 6 of the clamping unit. Its output shaft is parallel to the Z-axis and directly drives the clamping conveyor belt drive roller 4 to rotate around the Z-axis through the transmission mechanism.

[0109] Connection relationship of the spacing adjustment mechanism (refer to) Figure 1 , Figure 3 ):

[0110] The linear slider 13 can slide along the Y-axis on the guide rail of the high-precision linear module base 10.

[0111] The pitch adjustment servo motor 11 is fixed at one end of the high-precision linear module base 10, and its output shaft is parallel to the Y-axis.

[0112] The motor is connected to the ball screw 12 via a coupling. The nut seat of the ball screw 12 is rigidly connected to the linear slider 13.

[0113] Motion relationship: The rotation of the servo motor is converted into a precise reciprocating linear motion along the Y-axis by the linear slider 13 (and the entire clamping unit fixed on it) through the ball screw 12.

[0114] Dual-motor synchronous control:

[0115] The main conveyor servo motor 8 and the clamping conveyor servo motor 9 are connected to the same motion controller via a high-speed industrial Ethernet. Electronic cam synchronization control ensures that the linear velocities of the main conveyor belt 3 and the clamping conveyor belt 7 are always strictly equal in the X-axis direction.

[0116] Explanation of the implementation of auxiliary functions in the application examples:

[0117] To enable those skilled in the art to understand and implement the application embodiments of the present invention without any doubt, the specific implementation methods of the two key auxiliary functions involved are now described. It should be emphasized that the implementation of these functions all adopt conventional technical means in the art, that is, existing technology, and they do not constitute the innovation of the present invention in themselves, but together with the core device of the present invention, they jointly complete the final technical task.

[0118] 1. Regarding the implementation method of "automatic spacing adjustment":

[0119] The aforementioned automatic spacing adjustment mechanism can achieve precise closed-loop positioning, which is achieved using standard servo positioning technology in automated equipment in this field.

[0120] Position feedback element: A high-precision magnetic scale or optical glass scale (as a measurement reference for absolute position) is installed on the side of the high-precision linear module base 10. A matching reading head is installed on the linear slider 13.

[0121] Closed-loop control logic:

[0122] When the control system (PLC) issues a target spacing command, the command is sent to the driver of the spacing adjustment servo motor 11. The servo driver drives the motor to move, causing the linear slider 13 to move. The grating ruler reading head mounted on the linear slider 13 feeds back the absolute position coordinates of the slider to the servo driver or PLC in real time. The servo driver compares this external, real absolute position feedback with the command target position, forming a fully closed-loop position control. In this way, the system can precisely control the spacing between the two conveyor belts, with a repeatability accuracy of ±0.01mm.

[0123] 2. Regarding the implementation method of "dynamic straightening and clamping":

[0124] The "trumpet-shaped guide section" is a conventional mechanical design that achieves flexible guidance without power. Its specific structure and working principle are as follows:

[0125] Structural design:

[0126] At the inlet end of the flexible clamping and positioning unit, i.e., before the clamping conveyor belt 7 begins to contact the battery cell, an inlet guide block is installed. The inner surface of this guide block is machined into a curved surface with a smooth transition curve. Its inlet spacing is larger than the standard battery cell width, and then the curved surface gradually and smoothly narrows as it moves forward in the conveying direction (X-axis) until its end is flush with the working surface of the clamping conveyor belt 7. The guide block is preferably made of engineering plastics such as POM-C or PEEK that have undergone surface hardening and precision polishing.

[0127] Working principle (flexible straightening):

[0128] When a slightly misaligned battery cell is fed into this area by the main conveyor belt 3, its side will first come into contact with the wide "flare" inner wall of the guide block. Because the guide block's surface is extremely smooth and there is a converging angle between it and the battery cell, the battery cell, driven by the main conveyor belt 3, will experience a gentle lateral force pointing towards the clamping conveyor belt 7. Under the action of this lateral force, the battery cell will be smoothly and without impact "pushed" towards and ultimately precisely rest against the working surface of the synchronously moving clamping conveyor belt 7, completing the entire dynamic alignment and clamping process.

[0129] All the following examples and comparative examples, unless otherwise specified, follow the general preparation method described below.

[0130] The preparation method of aramid rope core conveyor belt includes the following steps:

[0131] Step 1: Pretreatment of high-dimensionally stable aramid core:

[0132] Raw material selection and yarn spreading: High-strength para-aramid rope with a twist of 40-60 twists / meter is selected. Before interface treatment, the aramid rope is passed through an ultrasonic yarn spreading device or a comb-shaped flattening expander to physically flatten it from a cylindrical rope bundle into a flat, uniformly thick ribbon-like fiber bundle.

[0133] Interface treatment (two-step method): Under constant pretension (50-100N), the flat fiber bundles are passed sequentially through two impregnation tanks:

[0134] Step 1 (Amination): Amino functional groups are grafted onto the surface of aramid fibers by passing them through a hydrolysis tank of aminosilane (such as KH-550) and drying them at 120-140℃.

[0135] Step 2 (vinylation): The surface is further grafted with vinyl functional groups that can be co-sulfurized with the working surface FVMQ by passing it through a solvent bath containing a special vinyl silane (such as A-151) and drying it at 70-90°C.

[0136] Step 2: Separate preparation of the two types of composite adhesives for the coating layer

[0137] Preparation of working surface rubber compound (grading process):

[0138] a. High-shear mixing: In an internal mixer, FVMQ raw rubber, fumed silica, processing aids, heat stabilizers and carbon nanotubes (CNTs) are thoroughly mixed and dispersed.

[0139] b. Low-shear mixing: On a low-temperature open mill, the above rubber compound is re-milled and gently mixed with hexagonal boron nitride nanosheets (h-BN), supported ionic liquid and ultra-high molecular weight organosilicon additive masterbatch by using a large roll gap and roll wrapping method.

[0140] c. Vulcanization: Finally, quickly mix in the vulcanizing agent and crosslinking agent, and then remove the film for later use.

[0141] Preparation of the driving surface adhesive:

[0142] a. Using a conventional internal mixer or open mill method, thoroughly mix HNBR raw rubber, HNBR-g-MAH, TAIC, high abrasion-resistant furnace black, zinc oxide, stearic acid, antioxidant, etc., and finally add vulcanizing agent, then sheet for later use.

[0143] Step 3: Asymmetric compounding, molding and vulcanization

[0144] Asymmetric bonding shaping:

[0145] a. Calender the two rubber compounds prepared in step two into sheets of the specified thickness.

[0146] b. In the mold, first lay the drive surface rubber sheet.

[0147] c. The flattened modified aramid cores treated in step one are tensioned and arranged on it at predetermined intervals.

[0148] d. Finally, cover the working surface with the adhesive sheet.

[0149] Co-vulcanization: The assembled semi-finished product is placed in a flat vulcanizing machine and subjected to constant pressure and temperature of 170-180℃ and 14-16MPa for 20-30 minutes for primary vulcanization. Under this temperature and pressure, two different rubber systems can complete the vulcanization reaction simultaneously, and a strong chemical bond is achieved through the interface-modified aramid core.

[0150] Post-processing: The vulcanized conveyor belt semi-finished product is subjected to a second vulcanization in an oven at 190-210℃ for 3-5 hours to improve the cross-linking network of FVMQ and remove low molecular weight substances. After cooling, the edges are trimmed to obtain the finished product.

[0151] To ensure the feasibility of this invention and eliminate uncertainties, the key raw materials used in this embodiment are specifically defined as follows, but the invention is not limited thereto:

[0152] FVMQ raw rubber (fluorosilicone rubber): Wacker ELASTOSIL® FLR 3900 / 40 A / B, vinyl content 0.5-1.0 mol%, Wacker Chemie AG.

[0153] HNBR raw rubber (hydrogenated nitrile butadiene rubber): Zetpol® 2000L from Zeon Corporation, Japan. Acrylonitrile content is approximately 36%, hydrogenation degree ≥99.5%, exhibiting excellent heat resistance (continuous use temperature ≥150℃) and chemical resistance.

[0154] Supported high-temperature resistant hydrophobic ionic liquid: 1-Butyl-1-methylpyrrolidone bis(trifluoromethanesulfonyl)imine salt ([BMP][TFSI]), CAS No.: 223437-11-4, Moni Chemical Technology (Shanghai) Co., Ltd., purity ≥99%, thermal decomposition temperature approximately 300℃; Support: mesoporous silica SBA-15, pore size 6-11nm. The ionic liquid was loaded onto SBA-15 using a solution impregnation-drying method at a loading-to-mass ratio of 1:1, Nanjing Xianfeng Nanomaterials Technology Co., Ltd.

[0155] Ultra-high molecular weight organosilicon additive: CA1509 ultra-high molecular weight siloxane masterbatch, with thermoplastic polyurethane (TPU) as the carrier, containing 50wt% ultra-high molecular weight polydimethylsiloxane (UHMW-PDMS), Shanghai Gaohe Chemical Co., Ltd.

[0156] Carbon nanotubes (MWCNTs): FloTube from Jiangsu Tiannai Technology Co., Ltd. ® 9000 series; average tube diameter 7-11 nm, length 50-250 μm, purity >98.5%, BET specific surface area 250-350 m² 2 / g.

[0157] Aramid rope: Made of para-aramid filament with a linear density of 1500 Denier, DuPont Kevlar® K291500D. Rope structure: 1×3 strands, with a twist controlled at 40-60 twists / meter.

[0158] Hydrophobic fumed silica: Cabot CAB-O-SIL® TS-530, Cabot Corporation; specific surface area 200 m² 2 / g, carbon content 3%-4%.

[0159] Antioxidant (for HNBR): Antioxidant 4020 (6PPD), chemical name N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, CAS No.: 793-24-8, Sheng'ao Chemical Technology Co., Ltd.

[0160] Reactive tackifier: HNBR-g-MAH preparation method: Mix 100 parts (by weight) of HNBR (Zetpol) ® Plasticize the 2000L sample on an open mill (roller temperature 40-50℃) 3-5 times; add 3-8 parts of maleic anhydride (MAH) and 0.5-1 parts of dimethylformamide (DMF) (MAH is dissolved in a small amount of acetone before mixing with DMF), mix thoroughly; add 0.3-0.8 parts of dicumyl peroxide (DCP) and 0.5-1 parts of antioxidant 1010, 5-8 times, ensuring uniform dispersion. Add to a twin-screw extruder (L / D≥40), temperature control: feeding section: 80-100℃; compression section: 120-140℃; homogenization section / die head: 150-170℃; 80-120rpm; residence time 3-5 minutes; nitrogen protection. The extruded strips are cooled in a water bath and granulated using a pelletizer. The granules are dissolved in toluene or xylene (solid content 10-15%), poured into a large amount of acetone to precipitate, and filtered. This process is repeated 2-3 times, followed by vacuum drying (60℃ to constant weight). Grafting rate determination (acid anhydride titration method): Accurately weigh 1g of sample, dissolve in 100mL of toluene, add 10mL of 0.1N KOH-ethanol solution, reflux for 30 minutes, cool, and titrate with 0.1N HCl-isopropanol using phenolphthalein as an indicator. The preferred grafting rate is 1%-3%, and the degree of hydrogenation of the HNBR matrix used is ≥99.5%, with a Mooney viscosity of 60-70.

[0161] Co-crosslinking agent: Triallyl isocyanurate (TAIC), CAS No.: 1025-15-6, Hangzhou Keli Chemical Co., Ltd., purity ≥99%.

[0162] Silane coupling agents:

[0163] Aminosilane: 3-aminopropyltriethoxysilane (KH-550), CAS No.: 919-30-2, Jiangxi Hongbai New Material Co., Ltd.

[0164] Vinylsilane: Vinyltriethoxysilane (A-151), CAS No.: 78-08-0.

[0165] Examples 1-5

[0166] Examples 1-5 and Comparative Examples 1-5 all followed the general preparation method described above.

[0167] The specific formulations of the working surface rubber layer 15 and the driving surface rubber layer 16 of the asymmetric functional composite aramid rope core conveyor belt of the present invention are shown in Tables 3 and 4. All embodiments use aramid cores with a twist of 40-60 twists / meter and treated with a yarn spreading and impregnation process.

[0168] The specific preparation process parameters for Examples 1-5 and Comparative Examples 1-5 are shown in Table 5. All comparative examples (except for the special process of Comparative Example 4) used the same preparation process conditions as Example 3.

[0169] Table 3: Adhesive layer formulations for working surfaces in Examples 1-5 (parts by weight)

[0170]

[0171] Table 4: Formulations of the driving surface adhesive layer in Examples 1-5 (parts by weight)

[0172]

[0173] Table 5: Specific preparation process parameters for Examples 1-5 and Comparative Examples 1-5

[0174]

[0175] Comparative Examples 1-6

[0176] Unless otherwise specified, all comparative formulations and processes are modified based on Example 3.

[0177] Comparative Example 1: The entire conveyor belt cover uses the working surface adhesive layer 15 formulation of Example 3.

[0178] Comparative Example 2: In the formulation of the working surface adhesive layer 15, instead of adding MWCNTs and supported ionic liquids, 15 parts of conventional conductive carbon black (VXC-72) were added.

[0179] Comparative Example 3: In the formulation of the working surface adhesive layer 15, instead of adding h-BN and UHMW silicone, 10 parts of PTFE micro powder were added.

[0180] Comparative Example 4: When preparing the aramid core, a spinning device was not used; instead, the circular aramid rope was directly impregnated with resin.

[0181] Comparative Example 5: A traditional homogeneous PU conveyor belt was used, with its core being ordinary high-twist polyester rope.

[0182] Comparative Example 6: The formulation and process of Example 3 were used, but HNBR-g-MAH and TAIC were not added to the formulation of the driving adhesive layer 16.

[0183] The conveyor belt samples obtained in the above embodiments and comparative examples were subjected to performance tests according to the following methods:

[0184] Dimensional stability (creep rate): The permanent elongation of the sample is measured by running it continuously for 1000 hours at 60°C under 50% tension of the rated load.

[0185] Surface resistivity of working surface: tested according to GB / T22042-2008.

[0186] Working surface friction coefficient: The dynamic friction coefficient between the working surface and the standard aluminum block is tested.

[0187] Driving surface friction coefficient: The static friction coefficient between the driving surface and standard nitrile rubber is tested.

[0188] Abrasion resistance of working surface (Akron abrasion): Volume loss is tested according to GB / T1689-1998.

[0189] Cleanliness (particle shedding test): The sample is bent 100,000 times, and the increase in the number of particles >0.5μm in the space above is measured using a particle counter.

[0190] Aramid rope pull-out strength: measures the force required to pull a single aramid rope out of a vulcanized rubber block.

[0191] Interlayer peel strength: According to GB / T532-2008 standard, the 180° peel strength between the working surface adhesive layer and the driving surface adhesive layer is tested. The sample width is 25 mm, the peel speed is 100 mm / min, and the stable peel force is recorded and converted to N / mm.

[0192] The test data for Examples 1-5 and Comparative Examples 1-6 are shown in Table 6.

[0193] Table 6: Test data of Examples 1-5 and Comparative Examples 1-6

[0194]

[0195] Table 6 shows that the data from Examples 1-5 demonstrate the excellent and adjustable overall performance of the present invention. The extremely low coefficient of friction on the driving surface of Comparative Example 1 (0.13) leads to severe slippage, proving the necessity of the asymmetric structure. While Comparative Example 2 is antistatic, significant particle shedding (>5000 particles) occurred during the cleanliness test, demonstrating the superiority of the present invention's dual-mode conductive system in cleanliness and antistatic properties. The working surface friction coefficient and wear resistance of Comparative Example 3 are inferior to those of Example 3, proving the superiority of the present invention's synergistic lubrication system. The dimensional stability and interfacial bonding strength (pull-out strength) of Comparative Example 4 are significantly reduced, demonstrating the crucial role of the fiber spreading and impregnation process in achieving high performance. Comparative Example 5 shows that traditional PU tape is far inferior to the present invention in all core performance aspects, comprehensively demonstrating the technological advancement of the present invention. Comparative Example 6, without any interfacial reinforcing agent, exhibits extremely low interlayer peel strength (<2 N / mm) and interfacial failure during testing, proving that direct co-vulcanization of FVMQ and HNBR cannot form an effective bond. The peel strength of Example 3 is much higher, and the failure occurs inside the adhesive layer (rubber failure), which strongly proves the effectiveness and necessity of the interface enhancement technology proposed in this invention.

[0196] Application Example 1: High-speed and precision transportation of new energy power battery cells

[0197] Application scenario: A square power battery production line is used to process aluminum-cased cells with dimensions of 148mm×91mm×26.5mm. The requirement is to achieve a positioning accuracy of ±0.2mm at a high speed of 90 meters / minute, and to have zero scratches on the cell surface.

[0198] Implementation plan: Adopt Figures 1-4 The dual-belt collaborative system shown in the figure uses asymmetric functional composite aramid rope core conveyor belts prepared in Embodiment 3 of the present invention for both the main conveyor belt 3 and the clamping conveyor belt 7. The main conveyor belt 3 and the clamping conveyor belt 7 are arranged with their working surface adhesive layers 15 facing each other, that is, the working surface adhesive layer 15 of the main conveyor belt 3 faces outward (bearing surface), and the working surface adhesive layer 15 of the clamping conveyor belt 7 faces inward (pressure surface), thereby forming a collaborative conveying channel that directly contacts the product to be processed.

[0199] Workflow: The control system automatically adjusts the spacing according to the cell width (91mm); the cell is placed on the main conveyor belt 3 and the two motors start synchronously; the cell is dynamically aligned and clamped by the flexible working surface of the clamping conveyor belt 7; the cell passes through the detection station at high speed under the cooperation of the two belts and achieves open-loop precise positioning by relying on the servo motor encoder; finally, the robot picks up the cell from the fixed point.

[0200] Application Comparison Example 1: Traditional Modular Mesh Belt Conveyor Solution

[0201] Comparative solution: The mainstream modular plastic mesh belt is used for conveying, and the lateral positioning is achieved by pushing and positioning a rigid POM baffle driven by a servo motor and a ball screw 12.

[0202] Workflow: The battery cell is conveyed to its approximate position on the conveyor belt, then the conveying stops. A lateral servo baffle quickly extends, pushing the battery cell towards a fixed baffle on the other side, completing the positioning. After the robot grasps the cell, the baffle retracts, and the conveyor belt restarts.

[0203] The test data for Application Example 1 and Application Comparative Example 1 are shown in Table 7.

[0204] Table 7: Test data for Application Example 1 and Application Comparative Example 1

[0205]

[0206] As shown in Table 7, the present invention replaces the intermittent "walk-stop-push" working mode with continuous synchronous clamping, significantly improving speed and cycle time. The inherent high dimensional stability and high friction drive surface of the conveyor belt achieve superior open-loop positioning accuracy. Its flexible and clean working surface fundamentally eliminates surface damage.

[0207] Application Example 2: High-speed transport of semiconductor wafer carriers (FOUP) in cleanrooms

[0208] Application scenario: An area conveyor belt in an automated material handling system (AMHS) of a semiconductor wafer fab, used for high-speed, vibration-free transfer of FOUPs containing 300mm wafers between OHT (overhead unmanned transport vehicle) and Stocker (wafer storage cabinet).

[0209] Implementation plan: The same dual-belt collaborative system of the present invention is used, but with a larger size to accommodate the dimensions of FOUPs. The conveyor belt uses the formulation of Example 5, aiming for high cleanliness and dimensional stability.

[0210] Workflow: OHT places the FOUP on the main conveyor belt 3, and the dual-belt system starts, smoothly and vibration-free feeding the FOUP into the Stocker's storage port. Its high-precision positioning capability ensures precise alignment between the FOUP and the Stocker.

[0211] Application Comparison Example 2: Traditional Stainless Steel Roller Conveyor Solution for Cleanrooms

[0212] Comparative solution: A combination of traditional stainless steel non-powered rollers and belt-driven rollers is used for conveying. Lateral positioning relies on rigid sidewalls.

[0213] Workflow: The FOUP rolls forward on rollers. Minor vibrations and impacts occur due to the gaps between the rollers. Positioning accuracy depends on the end effector and sensors.

[0214] The test data for Application Example 2 and Application Comparative Example 2 are shown in Table 8.

[0215] Table 8: Test data for Application Example 2 and Application Comparative Example 2

[0216]

[0217] As shown in Table 8, the surface contact of the present invention replaces the line contact of the roller, fundamentally eliminating the vibration source and providing a more stable conveying environment for the wafer. The high cleanliness of the conveyor belt's working surface (no metal friction, no shedding of CNT+ ionic liquid) is crucial for its application in the semiconductor field. The ultra-high dimensional stability meets the stringent requirements of semiconductor equipment for sub-millimeter precision.

[0218] Through detailed comparisons of the above two application examples and comparative examples in different fields, it is fully demonstrated that the asymmetric functional composite aramid rope core conveyor belt and its dual-belt synergistic application device of the present invention can provide solutions for the pain points of high-end manufacturing in different industries, and show great technical advantages in multiple dimensions such as efficiency, precision, product quality and production flexibility.

Claims

1. An aramid rope core conveyor belt, characterized in that, include: The core skeleton layer (17) contains multiple parallel aramid fiber ropes; The covering layer, which covers the core skeleton layer (17), is formed by vulcanization of composite rubber; The aramid cord conveyor belt has an asymmetric functional composite structure, and the cover layer is divided into: The working surface adhesive layer (15) covers at least one surface of the core skeleton layer (17) and is used to directly contact the conveying material. The matrix of the working surface adhesive layer (15) is fluorosilicone rubber, and its composite material contains an antistatic system composed of carbon nanotubes and high-temperature hydrophobic ionic liquid, and a high wear-resistant self-lubricating system composed of hexagonal boron nitride nanosheets and ultra-high molecular weight organosilicon additives. A drive surface adhesive layer (16), which covers the other surface of the core skeleton layer (17) opposite to the working surface adhesive layer (15), is used to contact the drive system. The matrix of the drive surface adhesive layer (16) is hydrogenated nitrile rubber and is designed to provide a higher coefficient of friction than the working surface adhesive layer (15). Furthermore, the working surface adhesive layer (15) and the driving surface adhesive layer (16) are bonded through a unified peroxide vulcanization system containing a co-crosslinking agent; the composite rubber compound of the driving surface adhesive layer (16) contains maleic anhydride-grafted hydrogenated nitrile butadiene rubber and triallyl isocyanurate as the co-crosslinking agent. At the main vulcanization temperature of 170-180℃, the free radicals generated by the decomposition of fluorosilicone rubber and hydrogenated nitrile butadiene rubber can simultaneously initiate the crosslinking of their respective rubber compounds and provide necessary active sites for the interface reaction; in the hydrogenated nitrile butadiene rubber formulation of the driving surface adhesive layer (16), maleic anhydride-grafted hydrogenated nitrile butadiene rubber is introduced. At the high vulcanization temperature, the maleic anhydride grafted... The maleic anhydride groups in the hydrogenated nitrile rubber undergo ring-opening esterification / amidation reactions with the trace terminal hydroxyl groups present in the working surface adhesive layer (15) of the fluorosilicone rubber or the amino groups introduced by the silane coupling agent, forming chemical covalent bonds at the interface. The co-crosslinking agent triallyl isocyanurate added to the formulation of the driving surface adhesive layer (16) has three allyl functional groups that can participate in the free radical crosslinking of the hydrogenated nitrile rubber and can also undergo copolymerization reactions with the vinyl groups in the fluorosilicone rubber. In the interface region where the two rubber layers are tightly bonded, the triallyl isocyanurate molecules can cross the interface and react with the molecular chains of the fluorosilicone rubber and the hydrogenated nitrile rubber to form an interpenetrating network structure.

2. The aramid cord conveyor belt according to claim 1, characterized in that, The aramid fiber rope was subjected to a constant tension spinning and impregnation process during its preparation, and its surface underwent a high-temperature resistant interface modification treatment.

3. A method for preparing an aramid rope core conveyor belt as described in claim 1 or 2, characterized in that, Includes the following steps: a) Perform an interfacial modification treatment on aramid fiber rope by spreading and impregnation; b) Prepare composite adhesives with two different formulations for the working surface adhesive layer (15) and the driving surface adhesive layer (16), respectively; c) The aramid fiber rope treated in step a) is asymmetrically bonded with the two composite adhesives prepared in step b); d) The bonded components from step c) are subjected to heat and pressure co-vulcanization.

4. An application of the aramid cord conveyor belt as described in claim 1 or 2, characterized in that, An article handling device for the manufacture of new energy vehicles, the device being mounted on a system rack (14) and comprising: The main conveyor unit includes a main conveyor belt drive roller (1) driven by a main conveyor servo motor (8), a main conveyor belt driven roller (2), and a main conveyor belt (3) surrounding thereon. The flexible clamping and positioning unit includes a clamping conveyor belt drive roller (4) driven by a clamping conveyor belt servo motor (9), a clamping conveyor belt driven roller (5), and a clamping conveyor belt (7) surrounding thereon. The flexible clamping and positioning unit is vertically mounted on one side of the main conveyor belt (3) via a clamping unit vertical mounting bracket (6). A synchronous drive system that uses electrical control to make the main conveying servo motor (8) and the clamping conveying servo motor (9) run synchronously; The main conveyor belt (3) and the clamping conveyor belt (7) both adopt the aramid rope core conveyor belt as described in claim 1 or 2, and the installation method is as follows: the working surface rubber layer (15) of the aramid rope core conveyor belt faces the conveyed parts, and the driving surface rubber layer (16) faces the respective driving rollers.

5. The application of the aramid cord conveyor belt according to claim 4, characterized in that, The device also includes an automatic spacing adjustment mechanism, which includes a high-precision linear module base (10) fixedly mounted on the system frame (14), a spacing adjustment servo motor (11), a ball screw (12), and a linear slider (13); the entire flexible clamping and positioning unit is mounted on the linear slider (13) and moves in a reciprocating linear motion along the guide rail of the high-precision linear module base (10) driven by the spacing adjustment servo motor (11).

6. The application of the aramid cord conveyor belt according to claim 5, characterized in that, The high dimensional stability of the core skeleton layer (17) of the aramid rope core conveyor belt, combined with the high coefficient of friction of the driving surface adhesive layer (16), is used to achieve open-loop high-precision positioning of the battery cell through the synchronous drive system.

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