1578 results about "Composite plate" patented technology

The invention belongs to the technical field of metal composite materials and hydrogen storage and transportation materials, and particularly relates to a high-strength hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage and a preparation method and application of the high-strength hydrogen-embrittlement-resistant layered metal composite material. According to the preparation method, the nickel-saving austenitic stainless steel (NEASS) and the 30CrMo steel are alternately overlapped in a multi-layer mode, and the processes of vacuum electron beam welding, high-temperature hot rolling, accumulative ply rolling, multi-stage heat treatment and the like are combined, so that the composite board with the layer number reaching hundreds of layers, firm interface bonding, excellent mechanical performance and good hydrogen embrittlement resistance is prepared; the technical problem that strength, toughness and hydrogen brittleness resistance of an existing metal material in a high-pressure hydrogen environment are difficult to consider at the same time is solved. The obtained composite material has high strength, high plasticity and excellent hydrogen embrittlement resistance, and is suitable for structural materials of high-pressure hydrogen storage tanks, hydrogen conveying pipelines and other key hydrogen energy equipment.

The invention provides a heat preservation box capable of rapidly replacing a cold source. The heat preservation box comprises a box body and cold storage plates; the box body is provided with a box door, a cold storage area, a control area and a cold source area are arranged in the box body, the cold storage area is separated from the control area and the cold source area through a middle partition board, and the control area and the cold source area are separated through a side partition board; a backflow partition board is arranged in the cold source area, the cold source area is divided into a cold source cavity and a backflow cavity through the backflow partition plate, the cold source cavity communicates with the lower portion of the backflow cavity, a plurality layers of cold sourceframes used for containing the cold storage plates are arranged in the cold source cavity, and the cold source cavity communicates with the cold storage area through an air inlet channel; an exhaustfan is arranged on the air inlet channel, the cold storage area communicates with the backflow cavity through a backflow channel, and an air blower is arranged on the backflow channel; a control module is arranged in the control area, a first temperature sensor is arranged in the cold storage area, the exhaust fan, the air blower, and the first temperature sensor are electrically connected with the control module; and box body, the middle partition plate and the side partition plate are all made of vacuum composite plates. According to the heat preservation box, the replacement efficiency of the cold source is improved.

The invention discloses a rural highway facility two-dimensional code identifier, a manufacturing method and an identifier management device, and relates to the technical field of two-dimensional code identifiers, the rural highway facility two-dimensional code identifier comprises a signboard, the signboard comprises a signboard body, an identifier publication area and an identifier content area, the identifier publication area and the identifier content area are both made of PVC composite boards, and the PVC composite boards are made of PVC composite boards. A glass bead type reflective coating is sprayed on the surface of one side, and an acrylic acid pressure-sensitive adhesive layer is arranged on the other side. The identification management device comprises a background terminal and a user side, the background terminal is used for realizing rural highway facility data management and event processing operation through module cooperation, and the user side is used for scanning the two-dimensional code on the surface of the signboard to obtain information and initiate interaction operation. According to the method and the system, 'one-path-one-grade 'data can be conveniently obtained by users, the data utilization efficiency is improved, common users can also participate in rural road management, the participation consciousness and enthusiasm of rural road management are enhanced, and the practicability and durability of the identification are improved.

The invention relates to the technical field of image processing, in particular to a composite board production process monitoring method and system. The method comprises the following steps: acquiring a side image of a to-be-detected metal composite plate, and dividing the side image into a first region and a second region; constructing a first texture statistical model for the first region, constructing a second texture statistical model for the second region, and constructing an interpolation texture statistical model according to the first texture statistical model and the second texture statistical model; traversing the image blocks of the side image, and determining a spectrum anomaly score graph of the current image block according to the observation power spectrum of the current image block, an interpolation average power spectrum model corresponding to the central ordinate of the current image block and an interpolation power spectrum standard deviation model, so as to obtain a residual image of the to-be-detected metal composite plate, and monitoring the production process of the metal composite plate by using the residual image. According to the technical scheme, the production process of the metal composite plate can be monitored.

The invention discloses a linear friction welding device and method for simultaneously welding three plates. The linear friction welding device comprises a workbench, a two-side fixing and clamping device, a pressure loading and control device, a middle plate clamping device and a middle plate driving device. The two side fixing and clamping devices symmetrically fix two side plates, the middle plate clamping device fixes a middle plate and moves along with the driving device, the pressure loading and control device drives the two side plates to be attached to the middle and apply pressure, and the middle plate driving device drives the middle plate to do high-frequency linear reciprocating motion. The method comprises the steps of fixing plates on the two sides, clamping a middle plate, driving the plates on the two sides to be attached to the middle plate, driving the middle plate to reciprocate, applying pressure, completing welding, unloading, loosening and the like, and synchronous forming of the double welding seams is achieved. According to the method, the problems of low multi-plate welding efficiency and poor quality of a traditional process are solved, the welding efficiency and the joint consistency are improved, and the method is suitable for multi-layer composite plate machining in the field of aviation, nuclear energy and high-end equipment manufacturing.

The invention relates to the technical field of fiber reinforced composite materials, in particular to a basalt fiber reinforced composite board in a dynamic heavy load environment and a preparation method. The basalt fiber reinforced composite board comprises an upper surface layer, an upper reinforcing layer, a core layer, a lower reinforcing layer and a lower surface layer. According to the invention, rigid nanoparticles and carboxyl-terminated nitrile rubber are introduced to construct a rigid-flexible composite toughening system, and nano aluminum oxide and silicon dioxide are taken as rigid particles and are uniformly dispersed in an epoxy cross-linked network, so that slippage and crack propagation of molecular chains can be effectively hindered, and the rigidity and damage resistance of a matrix are improved; meanwhile, the carboxyl-terminated nitrile rubber is used as reactive liquid rubber, after carboxyl of the carboxyl-terminated nitrile rubber reacts with epoxy groups, the carboxyl-terminated nitrile rubber is distributed in a matrix in a sea-island structure and can serve as stress concentration points, a large amount of crazing and shear bands can be induced, and a large amount of impact energy can be consumed; and the impact toughness is greatly improved while the high strength of the material is maintained.

The invention relates to the technical field of industrial visual inspection, and discloses a surface defect detection method for a copper-aluminum composite board. The method comprises the following steps: acquiring an original plate surface image through image acquisition equipment, and preprocessing to obtain a standardized image; performing texture field decomposition on the standardized image, separating out independent texture components of the copper layer and the aluminum layer, and calculating a coherence graph among the components; inputting the texture component and the coherence graph into a composite structure discrimination network, guiding feature fusion by the network according to the coherence graph, performing anomaly judgment, and outputting a pixel-level initial defect graph; and performing morphological and topological rule processing on the initial defect graph, generating a final defect contour, and performing superposition labeling on the final defect contour and the original graph. According to the method, the single material layer defect and the composite interface defect can be distinguished by separating the texture of the material layer and utilizing coherence guide analysis, and the detection precision is improved.

The invention belongs to the technical field of composite material manufacturing, and discloses a structural battery integrated composite board and a forming method and application thereof. According to the composite board, carbon fiber reinforced materials are adopted as positive and negative electrodes, glass fiber materials are adopted as a diaphragm and an insulating layer, epoxy resin-based solid-state structure electrolyte is adopted as a bonding packaging medium, and a curing agent, ionic liquid, electrolyte lithium salt, nano ceramic particles and other auxiliaries of specific types and proportions are introduced into epoxy resin; the multifunctional modification of the resin matrix is realized. And meanwhile, doping and surface grafting modification are performed on the electrode material, so that the energy density and the mechanical strength of the battery are improved. And further constructing a low-temperature formed metal or carbon-based circuit layer on the outer surface of the structural battery to form an integrated complex comprising the circuit board, the structural battery and the bearing structure. The composite board satisfies dielectric insulation and reliability, realizes integrated energy supply and signal processing, and is widely applied to weight and volume sensitive fields such as aerospace and new energy automobiles.

The invention provides a chimney titanium composite plate welding seam argon protection welding device, and belongs to the field of protection welding equipment.The chimney titanium composite plate welding seam argon protection welding device comprises a surrounding part which comprises an inner ring arranged in a cylindrical titanium composite plate, an inflation air bag is fixedly connected to the outer portion of the inner ring, and an air bag gas conveying pipe is fixedly connected to the right side of the inflation air bag; an argon conveying pipe is fixedly connected to the interior of the inner ring, a rotating ring shell is rotationally connected to the exterior of the inner ring, an exhaust port is fixedly connected to the exterior of the rotating ring shell, and a pushing assembly is arranged on the exterior of the rotating ring shell. The surrounding component is arranged, the rotatable rotating ring shell is used for driving the exhaust port to move, the argon outlet position can be adjusted according to the welding position, the welding position can be filled with argon all the time, the welding quality is prevented from being affected, meanwhile, adhesive tape is not needed for sealing, the operation convenience is improved, and the welding efficiency is improved. And the freely telescopic sliding column can retract into the fixing shell after welding is completed, and the welding stroke is prevented from being affected.

The invention provides a multi-layer composite board and a manufacturing process thereof, a refrigerator door body and a household appliance shell, and relates to the technical field of composite materials. The invention provides a multi-layer composite board. The multi-layer composite board comprises a base board, a magnetic sheet and a bonding layer. And the substrate is made of a glass material. And the magnetic sheet is compounded on one side of the substrate and can be attracted with a metal material or a magnetic material. The bonding layer is arranged between the substrate and the magnetic sheet and is used for bonding the substrate and the magnetic sheet; the bonding layer comprises raw material components which can be formed through light curing. The multi-layer composite board provided by the invention has the characteristics of magnetic attraction and corrosion resistance, also has the characteristics of simple process, easiness in manufacturing and low energy consumption, and is relatively high in structural stability.

A building material defect visual detection system driven by artificial intelligence is characterized in that a multispectral imaging module is used for performing high-resolution image acquisition on the surface of a building material under different illumination conditions and wave bands, and comprises a visible light camera, a near-infrared camera and a polarization imaging unit; the texture, color, reflectivity and microstructure information of the surface of the building material can be synchronously obtained, the self-adaptive illumination control unit is linked with the multi-spectral imaging module, and the intensity, angle and spectral distribution of a light source are automatically adjusted according to the type of the material of the building material, so that the contrast ratio of a defect area and a normal area is enhanced. Through deep linkage of the multispectral imaging module and the self-adaptive illumination control unit, the system quickly identifies the material type through first frame image analysis or RFID reading at the beginning of detection, and calls an optimal illumination parameter combination from a preset strategy library, for example, low-angle polarized light is started for a metal plate to suppress glare, so that the material type can be quickly identified. Near-infrared penetration of the composite panel is enhanced to reveal internal debonding.

The invention relates to the technical field of building materials, in particular to a core material for an A-grade fireproof metal composite plate and a preparation method of the core material. The core material for the A-grade fireproof metal composite plate is prepared from the following raw materials in parts by weight: 30 to 60 parts of matrix resin, 20 to 40 parts of flame retardant, 5 to 10 parts of modified montmorillonite, 0.5 to 2 parts of coupling agent, 0.5 to 3 parts of dispersing agent, 1 to 3 parts of compatilizer and 0.5 to 3 parts of lubricating agent. The core material has excellent flame retardance, antibacterial property and mechanical property.

The invention relates to a composite vapor chamber with vertical gradient capillary channels as well as a preparation method and application of the composite vapor chamber. The composite vapor chamber comprises an upper shell, a lower shell, a liquid absorption core and a heat transfer working medium, the upper shell and the lower shell are both composite boards formed by combining outer side base layers and inner side copper layers, the lower shell is provided with supporting columns protruding towards the inner side, and the supporting columns are located in the cavity and connected with the upper shell; the wick comprises a first wick, a second wick and a third wick, and the first wick is located at one end of the upper shell and combined with the copper layer of the upper shell; the second wick is positioned at one end of the lower shell and is combined with the copper layer of the lower shell; the third wick is an annular sleeve and sleeves the periphery of the supporting column, one end of the third wick is connected with the first wick, the other end of the third wick is connected with the second wick, and a heat transfer working medium backflow channel penetrating through the upper shell and the lower shell is formed; the heat transfer working medium is located in the cavity.

The invention provides a chimney titanium steel composite plate T-shaped joint positioning clamp, and belongs to the technical field of T-shaped joint positioning clamps, the chimney titanium steel composite plate T-shaped joint positioning clamp comprises a movable clamping mechanism, the movable clamping mechanism comprises an outer frame and a chimney winding drum, a plurality of clamping assemblies are arranged on the lower surface of the outer frame, and the plurality of clamping assemblies are used for clamping the chimney winding drum in the middle; a welding gun used for welding a T-shaped seam of a chimney winding drum is slidably arranged in the middle of the upper surface of the outer frame. The seam positioning mechanism comprises a T-shaped plate arranged at the T-shaped seam of the chimney winding drum in a sliding mode, a telescopic rod is fixedly arranged at the upper end of the T-shaped plate, a downward pressing assembly is arranged at the upper end of the telescopic rod, a plurality of transverse pushing assemblies are arranged on one side of the downward pressing assembly, and the transverse pushing assemblies and the downward pressing assemblies are matched with each other to enable the T-shaped plate to move downwards to position the T-shaped seam of the chimney winding drum. The effects that the welding efficiency is improved, and substandard welding quality caused by joint dislocation is prevented are achieved.

A composite board has a vacuum molded surface plate (12) and a bottom plate (13). Edges of the surface plate (12) and the bottom plate (13) are fixed into one piece by thermoplastic fixation, and a top wall of each supporting protrusion (135) and a body of the surface plate (12) are fixed into one piece by thermoplastic fixation. The composite board is formed by superimposing at least two layers of boards. A method for manufacturing the composite board provides process guidance for manufacturing the composite board.

The invention discloses a method and system for preparing a composite board through continuous pressing of straw and waste textiles, and relates to the technical field of waste utilization, the system comprises a straw preparation unit, a waste spinning preparation unit, a mixed paving forming unit and a continuous flat pressing type hot press which are connected in sequence, and control is achieved through a control unit. The method comprises the following steps: carrying out chopping, fiber tearing and drying treatment on straws, and carrying out fiber regeneration treatment on waste textiles; mixing the two materials with an adhesive in proportion, and paving to form a three-layer blank; and sequentially carrying out pre-pressing, segmented hot-pressing curing, cutting, stack cooling and sanding packaging to obtain a finished product of the composite board. According to the method, resource utilization of the straw and the waste textiles is achieved, and the produced composite board is excellent in physical and mechanical property, high in production efficiency and suitable for large-scale production.

A method for hot-press injection molding of a composite material control arm is disclosed. The resulting control arm structure includes a composite sheet with pin holes and needle holes, a rubber body, a ball pin, and a bushing. The mold used for hot-press injection molding has a rear mold with positioning pins, positioning holes, and a positioning cylinder. During molding, the composite sheet is hung on the positioning pins through its pin holes, the bushing is fitted onto the positioning cylinder, and the ball pin is inserted into the positioning hole through its pin shaft. Then, the front mold presses the composite sheet, bending its edges to form a concave shape. Finally, plastic is injected to form the rubber body, combining the composite sheet, ball pin, and bushing into a whole. The bushing has ribs extending circumferentially on its outer side. During injection molding, the two ends of the composite sheet rest on the outer side of a bushing's rib. By setting the ribs, the distance between the composite sheet and the outer circumference of the bushing is maintained, allowing the rubber to flow between the composite sheet and the bushing. This enables the pre-forming and injection molding of the skeleton to be completed on a single mold, resulting in stable product quality.

A liquid cooling dissipation device for electronic / computer products includes a top cover with a coolant cold plate and two cooling brackets. The cold plate has at least two sets of flow channels for accommodating coolant and connects to multiple heating elements. It features inlets and outlets at both ends, all connected to the flow channels. Tubes with mounting brackets at the top end are installed at these points. A condenser, mounted on the mounting brackets and featuring side brackets, includes at least two cooling flow channels, multiple heat-conducting plates, and several heat dissipation fins. The cold plate consists of four laminated layers: a first-layer bottom plate, a second-layer composite plate, a third-layer metal plate, and a fourth-layer top plate. Heat from the heating elements vaporizes the coolant, which the condenser returns to liquid, circulating via siphon effect and pressure differential.

The invention relates to an evaluation method, in particular to a method for evaluating the flanging self-piercing riveting quality of a composite board and a metal board. According to the method for evaluating the flanging self-piercing riveting quality of the composite board and the metal board, the failure load can be directly reflected by detecting the values of delta y, W and theta, and the pulling-out force (namely the connecting force) between the boards can be reflected through the failure load, so that the connecting quality between the boards in the same batch can be directly reflected, and the evaluation of the connecting quality between the boards is more accurate and visual. And the connection quality of the plate can be ensured to be qualified through accurate evaluation, and the use performance of the plate is ensured. And meanwhile, the riveting process can be optimized through evaluation, the riveting quality is improved, the riveting qualification rate is effectively increased, and the rework rate is reduced. The problems that an existing flanging riveting quality control method is not visual and cannot directly reflect the connection quality are solved.

According to the production method of the hot-rolled extra-thick and ultra-wide double-metal composite plate, S30403 is selected as a stainless steel layer, and the stainless steel layer comprises the following chemical components in percentage by mass: 0.02%-0.029% of C, 0.3%-0.5% of Si, 0.8%-1.0% of Mn, less than or equal to 0.04% of P, less than or equal to 0.005% of S, 18.0%-18.8% of Cr, 8.0%-8.2% of Ni and the balance of Fe and inevitable impurities; the base layer is made of Q355B low-alloy high-strength steel and comprises the following chemical components in percentage by mass: 0.06%-0.12% of C, 0.15%-0.3% of Si, 1.45%-1.6% of Mn, less than or equal to 0.02% of P, less than or equal to 0.005% of S, 0.02%-0.05% of Al, 0.008%-0.02% of Ti and the balance of Fe and inevitable impurities; the key process steps comprise assembling, heating, rolling, cooling and finishing, and industrial preparation of the high-performance bimetal composite plate with the width larger than 3.5 m, the total thickness not smaller than 100 mm, the base material larger than or equal to 90 mm and the stainless steel coating larger than or equal to 10 mm is achieved.

The invention relates to a copper-aluminum composite plate and a preparation method thereof, and belongs to the technical field of metal composite materials. The preparation method comprises the following steps: S1, carrying out microstructuring treatment on the surface of a copper plate to form a rough structure formed by micron-sized pits and bulges on the surface of the copper plate to obtain a microstructured copper plate; s2, depositing a zinc intermediate layer on the surface of the microstructured copper plate through a magnetron sputtering technology to obtain a galvanized copper plate; s3, the zinc middle layer of the galvanized copper plate is attached to the aluminum plate, and the copper-aluminum composite plate is obtained through hot pressing, rolling and heat treatment in sequence; the copper-aluminum composite board has excellent interface bonding strength and toughness.

A kind of metal composite board precision machining device, including workbench, the top of workbench is sequentially spaced apart along its length direction and is equipped with feeding assembly, alignment assembly and forming assembly, the feeding assembly includes two groups of interval arrangement support, each group of support includes two opposite interval arrangement support plate, two parallel interval arrangement feeding rollers are rotatably installed between the two support plates of same group, two auxiliary rollers are rotatably arranged between the two feeding rollers, and the feeding gap for the passage of plate is formed between the two auxiliary rollers and corresponding feeding roller respectively;Two support plates arranged on the same side are fixedly provided with connecting plate between them, and cleaning assembly for removing impurities and cleaning the joint surface of base plate and cover plate is slidably arranged between the two connecting plates, and reciprocating assembly for driving cleaning assembly to reciprocate is symmetrically arranged between cleaning assembly and feeding roller. Avoiding impurities to be pressed and embedded in interlayer bonding interface under subsequent rolling pressure, the close contact of two sides fresh metal matrix is blocked.

The application discloses a kind of synergistically modified decorative functional composite board and preparation method thereof.The board is all inorganic system, by substrate layer, inorganic hydrophilic expansion stress compensation layer, inorganic modulus transition layer and photocatalytic functional surface layer superposition.The compensation layer can produce reversible expansion with humidity, offset the shrinkage internal stress of board;Transition layer matches the mechanical properties of each layer, improves structural stability.The application can effectively prevent board warping, cracking and delamination, has air purification function, and there is no problem of organic component being photocatalytically oxidized, simple process, easy industrialization.

This invention discloses a composite panel, its preparation method, and its application, belonging to the field of building panel technology. The composite panel comprises, from the outside to the inside, a decorative layer, an anti-warping reinforcement layer, a foamed core layer, and a balancing layer, with a thermal expansion release structure at the edge. The anti-warping reinforcement layer uses a high-modulus glass fiber mesh to improve the panel's stiffness and suppress bending deformation; the balancing layer and decorative layer form a symmetrical structure to offset bending stress caused by temperature gradients; the thermal expansion release structure allows for micro-displacement of the panel to release thermal stress. This invention, through the synergy of the anti-warping reinforcement layer, the balancing layer, and the thermal expansion release structure, can effectively reduce the warping deformation of exterior wall cladding under thermal cycling conditions, while also possessing advantages such as weather resistance, thermal insulation, lightweight, and environmental friendliness. The preparation process is simple, suitable for large-scale production, and can be widely applied to composite imitation stone exterior wall cladding.

The application discloses a polyurethane and rock wool composite board side foaming leakage prevention device, and belongs to the technical field of building material processing. The device comprises a conveying frame and a foaming filling pipe. The board is conveyed on the conveying frame, and the foaming filling pipe is inserted into the gap between the rock wool layer and the lower side film paper. The front side of the lower side film paper is provided with a first guide piece, and the rear side is provided with a second guide piece. The lower side film paper is arranged between the first guide piece and the second guide piece. The upper side film paper is located at the front side of the first guide piece. A pressing wheel is arranged in front of the upper side film paper and is used for laminating the upper side film paper and the upper side layer. A carding piece is arranged and is used for pressing the upper side film paper and the lower side film paper together. The first guide piece is provided with glue which is coated on the surface of the lower side film paper and the upper side film paper. When the board moves on the conveying frame, the lower side film paper and the upper side film paper are bonded and pressed together. The application is used for solving the problems that the barrier layer is easy to deviate and the foaming is easy to leak during the processing of the composite board.

The utility model provides a novel prefabricated lightweight thermal-insulation ribbed composite wallboard, and belongs to the technical field of composite wallboards. The novel prefabricated light heat-preservation dense rib composite wallboard comprises a wallboard supporting structure and a light dense rib structure. The wallboard supporting structure comprises an annular frame and clamping blocks, the other side of the annular frame is provided with the clamping blocks corresponding to the clamping grooves, and the clamping blocks are clamped in the clamping grooves; the light dense rib structure comprises a dense rib sound absorption piece, light sound absorption parts and decoration panel layers, the light sound absorption parts are installed on the two sides of the dense rib sound absorption piece, the decoration panel layers are fixed to the two sides of the annular frame, and reinforcing pieces are embedded in the decoration panel layers. When the multi-ribbed composite board is used, traction can be formed between the multi-ribbed composite boards, the contact area can be enlarged, cracking can be effectively prevented, meanwhile, the overall sound insulation and absorption effect can be improved, and the multi-ribbed composite board is more convenient to use.

The application belongs to the field of epoxy resin composites, and specifically provides a high-strength low-density epoxy SMC composite material and a preparation method thereof, which is prepared by the following steps: S01. Taking a PVC core plate, gluing after grooving, then laying a fiber cloth, vacuumizing under negative pressure after film covering, then pouring a pre-impregnation liquid, and placing to obtain a pre-cured composite plate; S02. Taking the pre-cured composite plate, placing overnight after mold pressing treatment, and then obtaining after demolding and edge trimming treatment; the pre-impregnation liquid preparation step comprises the following: mixing an active diluent, an accelerator, modified microspheres and a filler, first adding an epoxy resin, stirring, then adding the remaining amount of epoxy resin, and then adding a curing agent and a demolding agent, and continuously mixing to obtain the pre-impregnation liquid; the modified microspheres are used as a pre-impregnation liquid additive component, and the prepared SMC composite material product has a density ≤1.57 g / cm 3 , an impact strength ≥84.5 KJ / m 2 , and good flame retardance.

This utility model relates to the field of mechanical processing equipment technology, and discloses a cutting device for processing composite panels, including a support frame, a worktable, a cutting machine, and a first motor. The worktable and the cutting machine are fixedly connected to the surface of the support frame, and the first motor is mounted on the surface of the support frame. The surface of the worktable has a stabilizing structure, which includes a fixed plate. The surface of the fixed plate is fixedly connected to the surface of the worktable. A groove is formed on the surface of the fixed plate, and a slider is slidably connected to the inner wall of the groove. A bidirectional screw is rotatably connected to the inner wall of the groove. This utility model solves the problems of traditional devices lacking an adaptive clamping mechanism, resulting in uneven or excessive clamping force, which damages the surface of the composite panel. At the same time, the lack of buffer design exacerbates the risk of material deformation, which in the long run affects the normal use of the device and thus its working efficiency.