115 results about "Tinning" patented technology

The utility model discloses a flexible high frequency data cable, include: conductor, the extrusion of conductor has PE insulating layer and forms core, is provided with foamed layer on PE insulating layer, the thickness of foamed layer accounts for 75% of PE insulating layer total thickness, and the foaming rate of foamed layer is 60%~65%, and every two core wire pairs form a pair of double -twisted pair, and the twisting pitch of every pair of double -twisted pair is different, and the aluminium -plastic composite tape is wrapped on double -twisted pair, and four pairs of double -twisted pair with aluminium -plastic composite tape are twisted into cable core, and the overlap gap of aluminium -plastic composite tape on each double -twisted pair all faces outward, and the tinned copper wire braid is woven on cable core, and the tinned copper wire braid covers and presses on the overlap gap of aluminium -plastic composite tape, and the weaving density of tinned copper wire braid is 70%, and the tape is wrapped on tinned copper wire braid, and the sheath is extruded on tape. The utility model can prevent the signal crosstalk between double -twisted pair without heat sealing to aluminium -plastic composite tape, thereby protecting PE insulating layer from being damaged.

The utility model discloses a new energy automobile copper clad aluminum braided shield high voltage cable in the technical field of high voltage cable, including stranded copper conductor, the fixed extrusion of insulating layer has on the outer wall of stranded copper conductor, the insulating layer is cross -linked polyethylene or cross -linked polyolefin insulating layer, the insulating layer outside fixedly set semiconductive inner layer, fill in the PP filling strip between semiconductive inner layer with insulating layer, the outer wall of semiconductive layer extrudes and has copper clad aluminum braided shield layer, copper clad aluminum braided shield layer is 0.1~0.2 tinned copper clad aluminum wire, and with semiconductive inner layer is 360 degree ring pressure contact, the outer wall of copper clad aluminum braided shield layer fixed extrusion has aluminum foil layer, the outer wall of aluminum foil layer fixed extrusion has semiconductive outer layer, the outer wall of semiconductive outer layer fixed extrusion has cross -linked polyolefin sheath, the utility model discloses can reduce the shielding layer direct current resistance, guarantees the continuity of grounding, promotes high -frequency shielding efficiency, strengthens in 100kHz~30MHz frequency band shielding attenuation.

This utility model discloses a wire-pair shielded data transmission cable with high transmission performance, comprising: a cross-shaped frame, the four isolation walls of the cross-shaped frame having different wall thicknesses, a buffer groove provided at the top of the isolation wall, and a folded groove aligned with the bottom of the buffer groove on the outer wall of the isolation wall, a filling rope and a set of twisted core wires arranged in the cavity between two adjacent isolation walls, aluminum-plastic composite tape wrapped around the twisted core wires, and tinned copper wire braided tape woven on the cross-shaped frame, the tinned copper wire braided tape being in direct contact with the aluminum surface of the aluminum-plastic composite tape, the tinned copper wire braided tape abutting against the twisted core wires and compressing the buffer groove, the groove wall of the buffer groove bending along the folded groove and abutting against the tinned copper wire braided tape after being compressed by the tinned copper wire braided tape, a wrapping tape wrapped around the tinned copper wire braided tape, and a sheath extruded onto the wrapping tape. This utility model has a simple structure and excellent signal shielding performance both internally and externally.

The application discloses a cold-pressing connection method for high-voltage outgoing lines and tap switches of a transformer, which comprises the following steps: firstly, determining the wire specifications and the wire quantity to be connected, and determining the tinned copper sleeve specifications; calculating the filling rate according to the wire cross-sectional area and the effective internal area of the tinned copper sleeve, so as to determine the wire quantity to be crimped and the filling wire; performing paint removal treatment on the wire end part to be cold-pressing connected, and the filling wire should be subjected to the paint removal treatment; and cold-pressing the wire by using a cold-pressing tool. The method replaces the existing traditional welding connection mode, the whole operation process is simple, different specifications of the high-voltage outgoing lines and the tap switches of the transformer can be quickly connected, the unique filling mode can ensure the tensile strength and the current-carrying performance of the wire, improves the wiring quality, and greatly improves the production efficiency.

The application provides a kind of tinned plate detection device, belongs to plate detection technical field, including detection frame and plate feeding and spreading component, the plate feeding and spreading component is two groups, symmetrically installed in the middle of the inner side wall of detection frame, the top of the inner side wall of the discharge end of detection frame is installed with a detection mechanism.The application is raised by roller pressing mechanism and primary detection mechanism, then the plate is worn between two plate feeding and spreading components, so as to clamp and transport the side edge of plate by plate feeding and spreading component, so that it can automatically cross detection device to complete feeding, reduce the dependence on manual, simplify the operation mode, improve the detection efficiency, and when plate feeding and spreading component is separated from plate at the end of conveying, transverse tension can be applied to both sides of plate by plate feeding and spreading component, to offset the edge wave, middle wave and buckling of plate caused by stress, to ensure the accuracy of surface flatness and thickness data collection.

The utility model discloses a kind of pin tinning devices of H-shaped inductor, to provide a kind of can be to small H-shaped inductor clamping tinning pin tinning device of H-shaped inductor. It includes: workbench, soldering pool and tinning pool are installed on workbench;Blanking assembly, blanking assembly is installed on workbench, blanking assembly with soldering pool and tinning pool correspond, detection assembly is equipped on blanking assembly;Transfer assembly, transfer assembly is installed on workbench and is placed above tinning pool;Corner assembly, corner assembly is installed on transfer assembly;Pick-and-place assembly, pick-and-place assembly is installed on corner assembly and corresponds with blanking assembly.The beneficial effects of the utility model are: can be to small H-shaped inductor clamping tinning, can guarantee inductance to arrange blanking, can realize horizontal movement, can adjust the angle of pick-and-place assembly, can take inductance, can guarantee the effect of tinning, can improve the precision of blanking.

This invention provides a method and related equipment for testing the wetting strength of tin-plated board surfaces. The method includes: acquiring a tin-plated board to be tested; drawing lines on the tin-plated board using a dyne pen to obtain the drawn lines; determining the changes in the drawn lines; for cases where capillary action occurs in the drawn lines, drawing lines again on the tin-plated board using a higher-grade dyne pen to obtain new drawn lines, until the new drawn lines show no change; and determining the grade of the dyne pen corresponding to the new drawn lines as the wetting strength of the tin-plated board surface. Thus, a quantifiable wettability index is provided. By testing the surface of the tin-plated board with a dyne pen, considering the surface morphology of the substrate, the relationship between the passivation film and the coating, and observing the pen marks, an evaluable method for testing the wetting strength of tin-plated board surfaces is established.

This invention belongs to the technical field of carbon fiber cable cores, specifically disclosing a fire-resistant carbon fiber composite cable core and its preparation method. The preparation method includes the following steps: S1, preparing carbon fiber microrods with a diameter of 0.5~1.5mm; S2, preparing an interface functional layer: plasma treatment, followed by sequential coating to form an elastic reset layer and impregnation coating to form a microparticle friction layer; S3, bundling 19~61 carbon fiber microrods in parallel; S4, stranding a composite load-bearing core with tin-plated copper wire; S5, preparing a fire-resistant isolation layer and an insulating protective layer: wrapping with mica tape and fiberglass tape to form a fire-resistant isolation layer, then extruding a low-smoke halogen-free flame-retardant material after heating and melting it to form an insulating protective layer. This invention, using the above-mentioned fire-resistant carbon fiber composite cable core and its preparation method, improves the electrical integrity and resistance to fretting wear of the cable core under high temperature and fire conditions, while also improving the stability of mass production.

This invention discloses a highly flexible, crush-resistant charging cable for new energy electric vehicles. It comprises, from the inside out, a cable core unit, an elastic buffer layer, a crush-resistant layer, a shielding layer, and an outer protective layer. The surface of the outer protective layer has a diamond-shaped anti-slip pattern. The crush-resistant layer is woven from tin-plated copper wire, aramid fiber, and carbon fiber, and has multiple stress-bearing and non-stress-bearing zones. The braiding density of the stress-bearing zones is greater than that of the non-stress-bearing zones. The elastic buffer layer contains multiple elastic rings and multiple honeycomb holes. The manufacturing process of the highly flexible, crush-resistant charging cable for new energy electric vehicles includes the following steps: S1, cable core unit preparation; S2, elastic buffer layer extrusion; S3, crush-resistant layer installation; S4, shielding layer preparation; S5, outer protective layer extrusion. This invention not only improves the crush resistance effect but also has the advantages of good overall cable flexibility, long service life, high stability, high safety, and high manufacturing yield.

The utility model relates to the technical field of electro -tinning plate production, and disclose a kind of feeding device for electro -tinning plate production, including working stand, the top of the working stand is fixed with fixed frame, the inboard of the working stand is equipped with conveying belt, and the surface and inboard of the fixed frame are provided with centering assembly and protection assembly;The centering assembly includes: motor, motor is used to drive each component movement;Round plate, round plate is used to drive short rod synchronous movement synchronously;Movable piece, movable piece is used to hold electro -tinning plate, the motor is fixed at the top of fixed frame, the feeding device for electro -tinning plate production is set to centering assembly, when needing to hold electro -tinning plate, motor is started, and round plate is rotated by fixed plate, movable plate, and the spring is clamped by connecting hole, short rod, moving plate, spring and clamping plate, and electro -tinning plate can be clamped and held vertically, without manual operation, efficiency is improved.

This utility model relates to a relay processing and testing assembly line. The coil lead processing fixture includes a frame, a fixture platform, and a rotary drive module. Multiple coil frame carriers are arranged circumferentially on the fixture platform. Along the outer periphery of the frame, an industrial loading and unloading unit, a flux soaking unit, a lead tinning unit, and a lead bending unit are sequentially arranged, respectively for loading coil frame workpieces, unloading bent workpieces, soaking coil leads in flux, tinning leads, and bending leads to obtain bent workpieces. The relay testing fixture includes a worktable and a processing track on it, a bent workpiece feeding unit, an armature feeding unit, an armature assembly unit, a riveting unit, a flipping unit, a lead detection unit, and a transfer unit. The armature assembly unit assembles the armature and yoke; the riveting unit rivets; the flipping unit flips the riveted relay workpiece; and the lead detection unit detects the leads. This assembly line achieves fully automated relay production, improving production efficiency and accuracy.

The utility model discloses a kind of tensile composite cable in the technical field of cable, and cable is composed of torsion-resistant combination core, conductor, nanometer composite insulation layer, shielding structure layer and protective sleeve. Torsion-resistant combination core is woven by high-carbon steel wire, glass fiber and kevlar fiber according to 1:1:1 proportion three-dimensionally, provides high strength and torsion resistance ability;Conductor is high-strength aluminum alloy wire with conductive ceramic coating on surface, is double helix winding outside torsion-resistant combination core, enhances flexibility and tensile property;Nanometer composite insulation layer is composed of nanometer silicon dioxide, nanometer aluminum oxide and high-molecular polymer base material, is equipped with tiny air passage inside, improves insulation performance and heat dissipation effect;Shielding structure layer includes tinned copper wire braiding shielding layer and aluminum-plastic composite film shielding layer, and the two are connected closely by conductive glue, effectively shield electromagnetic interference. Overall design significantly improves the tensile, torsion resistance, environmental resistance and shielding level of cable, meets the use demand under complex environment.

The utility model discloses a cleaning device for tinplate production, which includes a base, a column, a bracket, a first motor, and a fixed frame. An inlet for water and an inlet for alkali are provided at the top of the fixed frame. The output end of the first motor is fixedly connected with a stirring component. The bottom of the fixed frame is fixedly connected with an electric valve, and the water outlet end of the electric valve penetrates through a water tank. A water pump is arranged inside the water tank. One side of the column is fixedly connected with a first protective shell, and a second motor is arranged inside the first protective shell. The output end of the second motor is fixedly connected with a first rotating shaft, and a unwinding roller is fixedly connected to the outer surface of the first rotating shaft. One end of the first rotating shaft is rotatably connected with a first bearing, and one side of the first bearing is fixedly connected with the column. Through the above structure, comprehensive cleaning can be achieved.

The utility model provides a kind of cable with flat ground wire, comprising: cable core, the cable core outside is sequentially equipped with drag package aluminum foil layer and around package hot melt milar layer from inside to outside, the drag package aluminum foil layer drags into flat tinned copper ground wire;It aims to optimize assembly welding structure by introducing flat ground wire, improve the grounding effect of cable, and enhance the performance of cable in reliability test;This cable structure not only simplifies the assembly process, improves production efficiency, but also significantly improves the electrical performance and stability of cable, provides strong guarantee for the normal operation of complex electronic equipment and system.

This utility model discloses a combined signal shielding cable, comprising a shielding paper layer, a PTFE tape layer covering the outer periphery of the shielding paper layer, a water-blocking layer covering the outer periphery of the PTFE tape layer, a tinned copper wire braided layer covering the outer periphery of the water-blocking layer, an outer insulation layer covering the outer periphery of the tinned copper wire braided layer, and a plurality of first conductor assemblies and a plurality of second conductor assemblies disposed within the shielding paper layer. The spaces between the plurality of first conductor assemblies, the plurality of second conductor assemblies, and the shielding paper layer are filled with a plurality of dispersed bulletproof wires and a plurality of fiberglass yarns. This utility model can adapt to complex and changing usage environments. By providing a multi-layered protective structure around the first and second conductor assemblies, it improves the cable's resistance to swaying, bending, corrosion, and aging, thereby extending the cable's service life.

The utility model discloses a kind of busbar tinning cooling systems, the busbar tinning cooling system is installed in tin pool just above, comprising: cooling air duct, blower, ventilation duct and condenser, the cooling air duct includes air duct body and multiple nozzles, the air duct body is the hollow duct of two ends closed, the hollow duct front is provided with busbar cooling groove through first and last, multiple pairs of nozzle mounting holes through the hollow duct inside and outside are symmetrically arranged on the two side groove walls of the busbar cooling groove, a high-pressure nozzle is installed on each nozzle mounting hole, the hollow duct back is equipped with ventilation pipe interface and cooling air duct fixing mechanism, the ventilation duct is connected with the ventilation pipe interface and blower, the condenser is installed on the ventilation duct. By the above-mentioned mode, the utility model can improve the efficiency of busbar cooling, reduce the energy consumption of cooling process, reduce the operation cost of production line.

The application discloses a wire harness cutting and tin coating integrated automatic control method, relates to the technical field of industrial automation control, and is used for solving the problems of easy wire core cutting, uneven tin coating and end tin ice column in traditional wire harness processing. The wire harness cutting and tin coating integrated automatic control method first analyzes the wire dynamic hardness impedance by collecting the current characteristics of the feed and the tool holder motor, and adaptively compensates the peeling micro-feeding amount; then, the exposed wire core micro-distance image is acquired, affine transformation correction is performed based on the wire core deflection angle, and the filament dispersion coefficient is accurately calculated; next, the tin furnace real-time power attenuation and liquid level height data are fused, the optimal pressing depth and wetting time are dynamically solved, and a nonlinear pulling speed curve is generated; finally, the wire harness is controlled to be immersed in tin and pulled according to the planning, the current attenuation slope is monitored synchronously, the reverse pulse transient back pulling is issued when the surface tension fracture threshold is triggered, the liquid tin connection is physically cut off, and a flexible and precise integrated closed-loop control system is constructed.

This utility model provides a highly flexible wire, comprising: a cable core, with a sheath on the outside of the cable core; the cable core includes: multiple core wires, each core wire including: a conductor and a fluoroplastic insulation layer disposed on the outside of the conductor; the conductor includes: tinned copper wire, multiple tinned copper wires and / or the bulletproof reinforcing filler wire are twisted together to form the conductor; the sheath includes: a polyester fiber braided mesh disposed on the outermost layer. This invention overcomes the technical bottlenecks of flexible cables in terms of mechanical strength, temperature resistance, and dynamic durability, enabling use in environments with frequent movement, and solving the requirement for high temperature resistance. It ensures the cable's abrasion resistance while enhancing overall flexibility and extending the wire's service life.

The application discloses an anti-aging and anti-corrosion power cable structure and belongs to the technical field of power cables. The cable comprises, from inside to outside, an anti-corrosion conductor layer, a conductor shielding layer, a nano-composite insulation layer, an insulation shielding layer, a water-blocking and anti-corrosion buffer layer, an armored protection layer and a double-layer anti-aging sheath layer. The anti-corrosion conductor layer adopts a tinned copper stranded wire or an aluminum alloy stranded wire; the nano-composite insulation layer takes cross-linked polyethylene or ethylene-propylene rubber as a matrix; the water-blocking and anti-corrosion buffer layer is composed of an intumescent water-blocking tape and an asphalt-based anti-corrosion paste; the armored protection layer adopts a duplex stainless steel tape or a galvanized aluminum alloy tape; and the double-layer anti-aging sheath layer is co-extruded by an inner layer of high-density polyethylene and an outer layer of polyether polyurethane. The application remarkably improves the anti-aging, salt-fog resistance, acid and alkali resistance and electrical insulation performance of the cable through the multi-layer composite protection and nano-modification structure, and prolongs the service life of the cable in harsh environments such as coastal areas, chemical industries and underground acid and alkali soils.

The utility model discloses a low crosstalk data transmission connecting line belongs to data transmission line technical field, and its technical scheme main points include data line and the joint of being located at the both ends of data line, the data line includes precision stranded wire core group, layered shielding structure and outer sheath gradually from inside to outside, the joint is connected with the dust cover away from the one side of data line, the precision stranded wire core group contains a plurality of groups differential signal wire core, and is equipped with insulating spacer between each group wire core, and the surface of each group differential signal wire core is all covered and is connected with insulating spacer, through precision stranded wire core group cooperation insulating spacer and separator, through physical separation and stranded optimization, the electromagnetic coupling path between wire core is blocked, and the crosstalk in group and between groups is reduced greatly, and layered shielding structure forms multiple protection through aluminium foil longitudinal envelope layer, tinned copper wire braided mesh and nanometer wave absorbing material layer, and all -round barrier external electromagnetic and radio frequency interference, adapts complex electromagnetic environment such as industry.

The application discloses an integrated tinning machine intelligent control method and system combined with data fusion, and belongs to the field of automatic control. The method comprises the following steps: a multi-dimensional data fusion sensing step, in which the copper-clad steel wire speed, acceleration, width, yaw displacement and rectifier feedback current are acquired; a dynamic current density model construction step, in which a theoretical current reference value is output based on the Faraday electrolysis law and real-time bath parameters; a transient feedforward compensation control step, in which a current compensation amount is calculated according to the acceleration and phase delay time constant, and a predictive current control instruction is generated; and a side effect cooperative optimization step, in which the anode plate position and shielding state are dynamically adjusted according to the width and yaw displacement. The application is suitable for complex production conditions and improves the automatic operation level of the tinning machine set.

The utility model discloses a kind of for copper strip tinning's tin melting heating device, it is related to tin melting heating device field, including heating furnace and heating box inlaid fixed in heating furnace, the both ends of the heating furnace are fixed with mounting plate, recess is set in the both sides of the top end surface of mounting plate, two The mounting rod is fixed between the recess, the sliding sleeve of two The mounting rod between the same side is provided with tin scraping mechanism, the side wall of the heating box is provided with preheating plate, the both sides of the top end surface of the preheating plate are fixed with heat conduction frame, two The heat conduction frame is elastically provided with heat conduction plate between it. The utility model is by copper strip body before tinning in the top end of preheating plate sliding, first spring on sliding rod pushes heat conduction plate and copper strip body closely connect, preheating plate and heat conduction plate carry out preheating to copper strip body, positioning rod makes copper strip body move to the bottom of heating box, improve the retention time of copper strip body in heating box, improve the tinning effect of copper strip body.

The utility model discloses a kind of mining cables, its key points are: including power line core, control line core, center filling, wrapping layer, inner sheath, armoring layer, shielding layer and outer sheath.Power line core has 3, control line core has 3, 3 power line core and 3 control line core are stranded into cable, center filling is formed when center is placed filler strip during stranding, wrapping isolation band forms wrapping layer after stranding into cable, and wrapping cover rate is 25% to 30%.Inner sheath is extruded on wrapping layer outer by ethylene-propylene rubber.The armoring layer is inclined to be wrapped outside the inner sheath by galvanized steel wire.The shielding layer is inclined to be wrapped outside the armoring layer by tinned copper wire, and the cross section of the inclined wrapping is not less than 35mm square.The outer sheath is extruded on the shielding layer outer by chloroprene rubber material.

The utility model relates to cable technical field, concretely is a kind of low-temperature-resistant bending-resistant cable for plateau drilling device, including outer sheath, the inner sheath is arranged in outer sheath, fiber+tin-plated copper wire braiding reinforcing layer is arranged between the inner sheath with the outer sheath, the inner sheath is arranged in cable core, the cable core includes multiple control line core, each control line core includes conductor that is paired twisted distribution and is coated with insulating layer outside, and the screen shielding layer that is coated in paired conductor outside.The utility model provides a kind of low-temperature-resistant bending-resistant cable for plateau drilling device, is arranged by the outer sheath, insulating layer, paired twisted wire core, fiber+tin-plated copper wire braiding reinforcing layer, so that the cable has oil resistance, high strength, low-temperature resistance and good flexibility simultaneously, greatly increase the bending resistance of the cable.

The present application relates to copper wire production technical field, provide a kind of ultrafine copper wire's hot tinning equipment and process, including tinning tank, the side of the tinning tank is equipped with cooling tank with outside communication, the bottom and top of the cooling tank are equipped with the hole with tinning tank communication, to be worn and be worn in by copper wire, the top of the inside of the tinning tank is equipped with heating pipe, the inside of the tinning tank is equipped with guide roller assembly.The present application overcomes the deficiencies of prior art, reasonable in design, compact structure, copper wire tinning after cooling makes that tin layer is stable after heating again, makes that tin layer is close to molten state, through mould cutter assembly to the tin material on the surface of copper wire is scraped and is handled, for scraping and smoothing copper wire surface excess tin material, improve the uniformity and conductivity of copper wire surface coating.Tinning tank is equipped with several mould cutter assemblies arranged horizontally, prevent mould cutter assembly from overheating due to long time continuous use, avoid copper wire tinning layer accidental melting, prolong the service life of mould cutter assembly.

The utility model provides a kind of air volume adjustable air mixing knife for tinning, belong to air knife technical field, including air knife upper die and its below air knife lower die;Between the air knife upper die and air knife lower die, ultra-thin sealing gasket is equipped;Air inlet is opened in the outer lateral wall of air knife lower die;Air cavity is opened in the bottom of air knife upper die and the top of air knife lower die respectively;Air outlet is equipped between the air knife upper die and air knife lower die, close to the inner side position of ultra-thin sealing gasket;Threaded hole is opened in the top of air knife lower die;And screw rod limiting hole is opened in the top of air knife upper die;The utility model is equipped with ultra-thin sealing gasket, under meeting different air volume demand, the size of air volume is adjusted by replacing ultra-thin sealing gasket of different thickness, realizes flexible air volume control, without replacing entire air knife, by and the height of equal high gasket of ultra-thin sealing gasket thickness adaptation, ultra-thin sealing gasket can be protected.

The application discloses a kind of subway vehicle with multi-core thin-wall type fireproof cable and preparation process thereof, it is related to cable technical field, including center conductor, insulating layer, cable layer, shielding layer and sheath layer;Center conductor is twisted into by multiple single filaments tin-plated soft copper wire with diameter ≤0.15mm, pitch ratio ≤12:1;Center conductor surface is coated with nano ceramic coating, thickness ≤0.005mm;Insulating layer is the modified halogen-free flame-retardant polyolefin composite layer with thickness 0.15~0.3mm, includes nano montmorillonite and magnesium hydroxide synergistic flame-retardant system, addition amount ≥60phr;Cable weaving reinforcing layer is high-strength tensile aramid fiber woven layer, thickness ≤0.2mm, weaving density ≥85%;Shielding layer is aluminum foil and silver-plated copper wire woven composite shielding structure, total thickness ≤0.25mm;Sheath layer is irradiation crosslinking halogen-free flame-retardant elastomer, thickness 0.3~0.5mm, crosslinking degree ≥85%.The application has the characteristics of thin wall, light weight, high fire resistance and strong anti-interference, can meet the special needs of subway vehicle.

The embodiment of the present application discloses a conductive strip, a photovoltaic module and a preparation method of the conductive strip. The conductive strip comprises a substrate, the substrate has a first side and a second side arranged oppositely, the first side has a light reflection structure, a light reflection layer is arranged on the surface of the light reflection structure, and a welding layer is arranged on the second side. The light reflection layer is formed by electroplating or a non-liquid deposition process. The light reflection layer is formed by electroplating or a non-liquid deposition process (such as vacuum evaporation and magnetron sputtering), the plating layer material is deposited in the form of atoms, ions or gas, and the surface of the light reflection structure is uniformly covered. Compared with a traditional hot-dip tinning process, the accumulation and particles of liquid metal in the groove are reduced, and the original morphology of the light reflection structure is maintained to reduce the adverse effect on the reflectivity.