309 results about "Composite process" patented technology

The invention discloses a full-automatic vehicle film laminating machine and a hot-pressing compounding process thereof, and aims to improve the production efficiency of a vehicle film and the adhesive force of a film layer. The laminating machine comprises an electrostatic spraying chamber and a hot pressing chamber, and efficient compounding of membrane materials is achieved through the synergistic effect of the electrostatic spraying chamber and the hot pressing chamber; a film material is automatically fed into a laminating machine through an upper-layer film leading-in roller and a base material film leading-in roller, after the film material enters an electrostatic spraying chamber, the surface of the film material is subjected to corona treatment, and a nano coating solution is uniformly sprayed on the surface of an upper-layer film through an atomizer; meanwhile, redundant charged particles on the surface of the substrate film are collected through an electrostatic collection plate; the sprayed membrane material enters a hot-pressing chamber, and is heated and pressurized under the action of a hot-pressing roller, so that the two layers of membranes are tightly combined, and the high bonding strength between the membrane layers is ensured; and finally, the finished product film material is wound through a finished product storage roller, and a high-quality vehicle film product is formed.

The invention relates to the technical field of composite materials, in particular to a dry fiber band compounding device and method.The dry fiber band compounding device comprises a fiber band unwinding and winding mechanism and a fiber band winding mechanism, and the fiber band unwinding and winding mechanism comprises a fiber band unwinding assembly and a fiber band winding assembly; the powder spreading mechanism uniformly spreads powder towards the direction of the fiber belt; the two felt unwinding mechanisms are used for conveying felt materials to the upper layer of the fiber belt and the upper layer of the powder; the two release paper unwinding and winding mechanisms comprise a release paper unwinding assembly and a release paper winding assembly; the heating and pressurizing mechanism comprises a heating roller group and a cooling roller group, and is used for heating and applying pressure to the fiber belt, the powder and the felt between the two pieces of release paper; the hole pricking mechanism comprises needle rollers which can be relatively close to or far away from each other towards the fiber belt, and pointed needles are arranged on the needle rollers. According to the invention, through high coordination of powder sprinkling, heating and punching, roller gaps and applied pressure in the compounding process are accurately controlled, so that the compactness of a dry fiber belt is moderate, the permeability of a material in vacuum infusion is improved, and the high-quality mechanical property and application effect of a finished product are ensured.

The invention discloses geopolymer cement based on coal gangue activation reaction as well as a preparation method and application thereof, and relates to the technical field of building materials. The invention relates to a coal gangue concrete, which is prepared from the following raw materials in percentage by mass: 50 to 70 percent of activated coal gangue powder, 5 to 15 percent of alkali activator, 10 to 30 percent of auxiliary cementing material and water, wherein the water accounts for 30 to 40 percent of the total mass of the activated coal gangue powder, the alkali activator and the auxiliary cementing material. Through a composite activation process of medium-temperature calcination decarburization and superfine grinding, the activity of silicon-aluminum components in the coal gangue is effectively excited, the reaction efficiency is remarkably improved, the mixing amount of the coal gangue reaches 50%-70%, the resource utilization rate of solid waste is greatly increased, and efficient activation and resource utilization of the coal gangue are achieved. By adopting the methyl sodium silicate and sodium silicate composite activator, the reaction rate and the product structure are regulated and controlled, and the workability and the setting and hardening behaviors of slurry are improved, so that the obtained geopolymer cement has relatively high early and later strength and excellent durability.

The application provides a double-metal composite drill rod with a special-shaped section and a manufacturing process thereof, and the double-metal composite drill rod with a special-shaped section comprises a steel-aluminum special-shaped section composite rod body, the steel-aluminum special-shaped section composite rod body comprises a steel outer tube, and an aluminum alloy inner tube is arranged in the steel outer tube; an inner-outer tube special-shaped torsion transmission section transmission structure is adopted between the aluminum alloy inner tube and the steel outer tube; or a special-shaped connecting pin torsion transmission structure is adopted between the aluminum alloy inner tube and the steel outer tube. The double-metal composite drill rod with a special-shaped section fully utilizes the high strength and wear resistance of steel and the high specific strength and corrosion resistance of light alloy, adopts a mechanical composite process, forms a light double-metal composite drill rod with a special-shaped section and a processing technology, and has the comprehensive performance of light weight, high strength, good processing performance, low cost, corrosion resistance and good wear resistance.

The invention relates to the technical field of device connection, in particular to an ultrasonic-assisted W80Cu20 alloy connection method. The method comprises the following steps that SnSb10 brazing filler metal is provided; the first W80Cu20 alloy matrix, the second W80Cu20 alloy matrix and the SnSb10 brazing filler metal are subjected to surface cleaning; the cleaned SnSb10 brazing filler metal is placed between the first W80Cu20 alloy matrix and the second W80Cu20 alloy matrix, and a'matrix-brazing filler metal-matrix 'sandwich structure is formed; after the backflow heat preservation treatment is finished, an ultrasonic energy field is applied to the sandwich structure immediately; and heating and ultrasonic treatment are stopped, cooling is conducted to the room temperature, and the W80Cu20 / SnSb10 / W80Cu20 welding joint with the SnSb10 brazing filler metal as the middle layer is formed. According to the ultrasonic-assisted W80Cu20 alloy connecting method provided by the invention, the SnSb10 brazing filler metal is adopted, a backflow-ultrasonic composite process is combined, and a W80Cu20 / SnSb10 / W80Cu20 joint with firm metallurgical bonding is formed between the W80Cu20 alloys by utilizing the rapid reaction of a Cu phase in the alloy and the brazing filler metal, so that the shear strength of the joint reaches a high level.

Disclosed in the present invention is a ceramization composite process applied to a metal substrate, comprising the following steps: 1) performing micro-arc oxidation treatment on a metal substrate; and 2) performing post-treatment on the metal substrate obtained in step 1). In the present invention, micro-arc oxidation treatment is performed on the metal substrate, which may result in micro-arc oxidation ceramic films of different colors on the surface of the metal substrate, the colors are uniform, and the appearance is beautiful; and then post-treatment is performed on the metal substrate to form protection for the micro-arc oxidation ceramic films and fill micro-pores of the micro-arc oxidation ceramic films, such that micro-film pores on the surface of the metal substrate undergone the micro-arc oxidation treatment are sealed, thereby greatly improving the stain resistance, weatherability, and surface hardness of the metal substrate, preventing film layer pulverization or cracking after the metal substrate is impacted, and solving the problems of poor stain resistance caused by the presence of micro-pores on surfaces, poor weatherability and insufficient surface hardness caused by open and unsealed film pores, and high hardness and brittleness of micro-arc oxidation films of existing micro-arc oxidation processes.

The application discloses an optical metamaterial fiber coating composite process and relates to the technical field of fiber coating. The optical metamaterial fiber coating composite process comprises the following steps: S1, raw material and equipment preparation: selecting a fiber base material, a metamaterial coating raw material and auxiliary modified raw material, the fiber base material being one of a single-mode optical fiber, a PA66 polymer fiber or a glass fiber, the purity of the metamaterial coating raw material being greater than or equal to 99.5%; selecting a coating equipment, a plasma cleaning machine, an ultrasonic cleaning machine and a low-temperature annealing furnace, completing equipment debugging and calibration and ensuring that equipment operation parameter errors meet preset standards. The optical metamaterial fiber coating composite process is convenient for applying a constant extrusion force to the glue during coating and compounding, the glue can enter the inside of the fiber base material, coating and compounding are more sufficient, and the quality of coating and compounding is improved.

The invention discloses a multi-target-oriented composite cutting step parameter optimization method. The method comprises the steps that composite step parameters are set for a machined part; carrying out a processing experiment to obtain the processing energy consumption, the processing time and the surface roughness corresponding to each group of composite working step parameter combination; establishing a nonlinear mapping model between the composite working step parameters and the optimization target; a PESA-II algorithm is adopted to optimize the values of the composite process step parameters; and a composite working step parameter value combination enabling the processing energy consumption, the processing time and the surface roughness to be comprehensively optimal is screened out through comprehensive decision. According to the method, rough machining and finish machining serve as an overall process, parameters of rough machining and finish machining steps are integrally optimized, three-phase indexes of machining energy consumption, machining time and surface roughness are comprehensively optimal, and the method has the remarkable beneficial effects of improving the product quality and reducing the production cost.

This invention relates to the field of geotechnical drilling engineering technology, and discloses a method for drilling small-diameter deep wells, comprising the following steps: using a positive circulation drilling rig to prepare a mud system based on the laterite soil of the construction site; using a composite reinforced roller cone bit for drilling operations in pebble layers; using a semi-automatic pulley system to connect or disconnect drill rods; using a positive circulation drilling rig to perform a segmented lifting and scraping wall composite process for drilling, in which a hole guide tool is used for scraping the wall; determining the depth of the aquifer before lowering the well casing; completing the butt joint connection of the well casing by welding, and completing the lowering and installation of the well casing; after the well casing is installed, sequentially performing mud replacement, air compressor agitation and well washing, and simultaneously completing the symmetrical backfilling of filter material; conducting a pumping test to complete the well completion quality acceptance. This invention can significantly improve drilling efficiency, well completion quality, and construction safety in complex pebble formations, while effectively reducing construction costs.

The application provides a high-strength rare earth magnesium alloy based on a room-temperature rotary swaging composite process and a preparation method thereof.The method comprises the following specific steps: according to designed components, raw materials are smelted to obtain a semi-continuous casting ingot, the rare earth magnesium alloy ingot is subjected to homogenization treatment, then is preheated and kept warm to be subjected to differential temperature extrusion, the extruded rare earth magnesium alloy is subjected to multi-pass rotary swaging treatment with a small deformation at room temperature, and finally is subjected to artificial aging treatment.Through the composite process with the room-temperature rotary swaging, the grains can be refined, the texture can be improved, and a large number of dislocations and twins can be introduced into the grains, so that the nucleation sites and precipitation power of precipitated phases in the aging process are improved, the aging strengthening capacity is more excellent, and the high-strength rare earth magnesium alloy is obtained.The application of the light-weight high-strength rare earth magnesium alloy in the fields of aerospace, rail transportation and automobiles can be accelerated.

A three-in-one production line selectively combining a flat position dry method and a solvent-free composite technology comprises a first unit, a second unit and a third unit, the second unit is arranged between the first unit and the third unit, a first connecting plate is arranged between the top of the first unit and the top of the second unit, and a second connecting plate is arranged between the top of the second unit. A second connecting plate is arranged between the top of the second unit and the top of the third unit; the first unit comprises a second unwinding unit and a first coating unit, the second unit comprises a first unwinding unit, a winding unit, a first compounding unit and a second compounding unit, the third unit comprises a third unwinding unit and a second coating unit, a first drying oven is arranged on a first connecting plate, and a second drying oven is arranged on a second connecting plate. And a second drying oven is arranged on the second connecting plate. According to the principle of the utility model, the coating unit and the drying oven are selectively started, and different coating units are replaced, so that a dry method and a solvent-free three-in-one composite process can be freely switched, and the coating process requirements of different composite materials are met.

The utility model relates to a geomembrane production laminating device which comprises a geomembrane base material, a conveying roller, a conveying base, a laminating assembly and a spraying assembly, and a geomembrane enters a composite die after passing through the laminating assembly and the spraying assembly; the film covering assembly is fixedly installed on the conveying base, at least one set of protective films are installed on the film covering assembly, and the protective films are located on the outer portions of the edges of one side or / and the two sides of the geomembrane base material respectively; the spraying assemblies are located outside the edges of the two sides of the geomembrane, each spraying assembly comprises a spraying pipe and a spraying head, and the spraying heads are arranged towards a protective membrane of a geomembrane base material; the geomembrane laminating device is reasonable in structural design, protective membranes can be laid on the surface of a geomembrane base material in the geomembrane base material production process by adding the laminating assembly and the spraying assembly, meanwhile, the protective membranes are prevented from being bonded together in the compounding process in a water spraying mode, and therefore a geomembrane with the protective membranes or a composite geomembrane can be machined and formed.

The application discloses a wear-resistant waterproof composite type fabric with a pile surface and a preparation method thereof, and relates to the technical field of textile fabric preparation.The technical scheme points of the application are as follows: nylon four-way stretch base cloth and a warm inner layer with single-brushing and single-rotating raising are selected, and a TPU waterproof and moisture-permeable film is arranged between the two; reaction type polyurethane hot melt adhesive is used to carry out point-shaped bonding in a relaxed state in which the warp and weft directions do not have elastic elongation after being subjected to an overfeed treatment, so as to construct an elastic buffer layer and a micropore channel; and finally, DWR durable water repellent treatment is carried out on the surface of the base cloth. By means of the overfeed composite process, internal stress is eliminated, and the non-continuous adhesive points are used as flexible hinges, so that the problems of easy edge curling, blistering and film layer fracture of the high-elastic fabric composite are effectively solved, and the fabric has the advantages of soft hand feeling, firm interlayer combination, size stability, excellent waterproof and moisture-permeable balance and washing resistance.

The application relates to the field of vacuum aluminum-plated paper processing and specifically discloses a dry-wet compounding process for vacuum aluminum-plated paper. The dry-wet compounding process for vacuum aluminum-plated paper comprises the following preparation steps: S1, coating a bottom adhesive on a film, and heat setting one side of the bottom adhesive close to the film; S2, compounding the heat-set bottom adhesive with base paper, curing the bottom adhesive, and forming a bottom coating layer on the surface of the base paper; S3, vacuum aluminum plating on the side of the bottom coating layer away from the base paper to form a vacuum aluminum-plated layer; and S4, coating a surface adhesive on the side of the vacuum aluminum-plated layer away from the bottom coating layer, curing to form a surface coating layer, and obtaining vacuum aluminum-plated composite paper. The dry-wet compounding process can improve the amount of the bottom adhesive without causing overflow of the bottom adhesive, improve the folding resistance of the obtained vacuum aluminum-plated paper, and solve the color explosion problem.

The present application relates to the technical field of conductive foil, specifically to a multilayer composite conductive foil and its preparation method and application, specifically comprising the following steps: S1. aluminum foil is immersed in NaOH solution and then cleaned with deionized water, dried to obtain pretreated aluminum foil; S2. using a magnetron sputtering instrument, using a Ti-Zn-C-Ni composite target material to sputter the pretreated aluminum foil, and obtaining a transition layer conductive foil after deposition; S3. the modified functional slurry is coated on the surface of the transition layer conductive foil by a doctor blade coater, then added to an oven for segmented curing, and then annealed, and after cooling to room temperature, a multilayer composite conductive foil is obtained. The present application forms a strong adhesion bottom layer with the substrate through the composite process design of sputtering and coating, blocks the corrosion of electrolyte to the substrate, and also bears the conductive and catalytic functions. The two functional layers obtained by the two processes are further fused through annealing treatment, forming a gradient interface, eliminating interlayer stress, and improving the overall structural stability.

The invention relates to the technical field of material surface treatment, in particular to a PPEM-GT coating compounding process which comprises the following steps: S1, pretreating a base material; step S2, preparing a PPEM primer; s3, coating of a PPEM primer is carried out; s4, preparing a GT intermediate layer material; step S5, coating a GT intermediate layer; s6, preparing a surface coating material; and S7, a surface coating is coated. The nano silicon dioxide is added into the PPEM primer, the graphene and the nano titanium dioxide are introduced into the GT intermediate layer, and the nano aluminum oxide is added into the surface coating, so that the composite coating has relatively high hardness and good wear resistance.

The application provides a kind of grain texture synergic control's ceramic copper-clad plate oxygen-free copper strip, by mass percentage, chemical composition is: Cu is greater than or equal to 99.97%, O is less than or equal to 0.0005%, P: 0.0015%~0.0025%, Mg: 0.005%~0.01%, Sn: 0.005%~0.01%, the remainder is inevitable impurity.The application also provides the preparation method of the above copper strip, based on multiple rolling+intermediate annealing composite process.The application has the advantages that: through the microalloying treatment of oxygen-free copper, simultaneously using multiple rolling+intermediate annealing composite process, by adjusting the reduction distribution, the ratio of deformation texture and recrystallization texture is optimized, effectively inhibits high temperature grain growth;The prepared copper strip has high conductivity, high thermal conductivity, excellent surface quality, low plane anisotropy, and the grain is small and uniform after high temperature annealing, which significantly improves the high temperature resistance.

The invention discloses a TiAl alloy and an additive manufacturing composite process preparation method and application thereof, and belongs to the technical field of titanium-aluminum alloy manufacturing. The invention discloses a preparation method of a TiAl alloy. The preparation method comprises the following steps: S1, preparing a Ti bracket by adopting a laser powder bed melting process; s2, filling the Ti stent with aluminum powder, and performing hot isostatic pressing treatment after sealing; and S3, then heat treatment is conducted, and the TiAl alloy is obtained. Wherein the energy density of the laser powder bed melting process is 60-70J / mm < 3 >; the heat treatment comprises first heat treatment, and the temperature of the first heat treatment is greater than or equal to 800 DEG C. Through flexible regulation and control of the components of the alloy and the compounding process, the prepared TiAl alloy has excellent strength and toughness, the yield strength of the TiAl alloy is larger than or equal to 672 MPa, the maximum strength of the TiAl alloy is larger than or equal to 750 MPa, and the maximum strain of the TiAl alloy is larger than or equal to 9.0%.

The invention relates to the technical field of intelligent management of brewing processes, and discloses an informatization intelligent management system and method for a brewing process of Luzhou-flavor liquor. The system comprises a brewing data multi-dimensional analysis module, a brewing track construction module, a process knowledge deconstruction module and a brewing parameter dynamic recombination module. The system performs acquisition, cleaning and dimension separation on multi-source heterogeneous data of a whole brewing process, and constructs a dynamic brewing track reflecting a single-batch complete life cycle through time sequence alignment. And further, the continuous process is deconstructed into discrete nodes based on the process knowledge graph, the incidence relation of multi-source data characteristics in the nodes is analyzed, and a new composite process parameter group is dynamically aggregated. According to the method, the problems that brewing data are isolated and dispersed, a batch panoramic view cannot be formed, process parameters are rigid, and the process internal state is difficult to deeply represent are solved, and full-link digital tracing of the brewing process and process state deep cognition based on data fusion are realized.

The invention relates to the technical field of facing artificial boards, in particular to a preparation method of an antistatic flame-retardant facing artificial board, which comprises a decorative paper preparation process, a base material preparation process and a compounding process, and the decorative paper preparation process sequentially comprises the following steps: step 1, obtaining a first raw material and a second raw material; secondly, the first raw material is treated in a blow molding mode, when the first raw material is subjected to blow molding to form a tubular hollow adhesive film and has the temperature of 110-120 DEG C, the second raw material with the temperature of 80-90 DEG C is provided for the outer side film face of the hollow adhesive film, and therefore the hollow decorative paper film is obtained; thirdly, the blow-molded hollow decorative paper film is led and taken; wherein the first raw material comprises a mixed adhesive added with a flame retardant, an initiator and a grafting monomer, and the second raw material comprises paper pulp added with an antistatic agent.

A flame-retardant, antistatic, waterproof, and breathable functional composite fabric, its manufacturing method, and its application are disclosed, relating to the field of textile fabric technology. The composite fabric comprises a flame-retardant and antistatic fiber fabric outer layer, a waterproof and breathable membrane middle layer, and a flame-retardant inner lining layer. These layers are sequentially laminated together using hot melt adhesive. The composite process forms a multi-layer structure. The introduction of flame-retardant and antistatic fiber fabric in the outer layer effectively improves the composite fabric's high-temperature resistance, reducing the risk of melting or deformation near fire sources. The inner and outer layers are woven from aramid conductive fibers, possessing excellent flame-retardant and antistatic properties, providing convenience and safety for industrial workers. The waterproof and breathable membrane middle layer ensures the fabric is breathable and cool to wear, guaranteeing all-around protection and comfort in special environments. This invention's composite fabric has advantages such as lightweight, high-temperature resistance, flame retardancy, windproof warmth retention, and good antistatic properties.

This invention relates to the technical field of textile packaging products, and in particular to a composite textile packaging bag and a composite process, comprising the following steps: S1, slurry preparation and homogenization: a bio-based polymer, plasticizer, modified nanofiller and solvent are mixed in proportion and placed in a stirring device for mixing and stirring to form a homogeneous functional composite slurry; S2, substrate pretreatment: a biodegradable textile substrate is provided and its surface is activated; S3, slurry coating; S4, gradient curing and composite: the substrate coated with slurry is sequentially passed through a first heating zone, a second heating zone and a third heating zone with gradient temperatures for stepwise drying, cross-linking curing and cooling, so that the functional composite slurry forms a dense barrier layer on the surface of the substrate, thereby obtaining the multifunctional biodegradable composite material; the substrate and slurry components used are biodegradable, improving environmental friendliness.

The invention discloses a process method for promoting nitriding through an amorphous nitride pre-coating film, and belongs to the field of chemical heat treatment. The invention provides a process method for compounding a pre-plated amorphous nitride film and vacuum nitriding in order to achieve a larger nitriding layer depth in a shorter time, reduce the production cost and improve the hardness of a nitriding layer in order to solve the problem that an existing compounding process for pre-plated metal layers and nitriding does not effectively promote nitrogen elements to permeate into a substrate, and the invention provides the process method for compounding the pre-plated amorphous nitride film and the vacuum nitriding. Compared with a non-pre-plated part, the composite process has the advantages that the nitriding layer depth is increased by more than 30% at most and the surface hardness is increased by 22% at most within the same nitriding time.

The invention discloses geopolymer cement canvas and a preparation method thereof, and relates to the field of inorganic nonmetal composite materials and civil engineering materials, the canvas comprises an upper functional fabric, a single-component geopolymer inner core layer and a lower functional fabric which are stacked from top to bottom, and the upper functional fabric, the single-component geopolymer inner core layer and the lower functional fabric are mechanically locked into an integral flexible structure through suture lines; the single-component geopolymer inner core layer is composed of an aluminosilicate precursor, a composite solid alkali activator and a nano modifier. The preparation method comprises the steps of fabric laying, geopolymer powder spreading, compacting, fabric covering, sewing and post-processing. The functional gradient fabric and single-component geopolymer collaborative design is adopted, a traditional complex composite technology is replaced with mechanical sewing, the problems that an existing flexible cement-based material is complex in structure technology, high in cementing material carbon emission, low in solidification speed and insufficient in combination reliability are solved, and the composite material has the advantages of being fast in solidification, early in strength, low in carbon, environmentally friendly, durable, stable and the like; the method is suitable for slope protection, emergency repair and other engineering scenes.

The invention discloses a layered dissimilar metal hot-pressing composite forming method, and belongs to the field of layered metal material manufacturing. According to the method, firstly, at least two metal components are provided, the first metal component with the highest melting point is a metal block, the other components are metal powder, and the melting points are reduced layer by layer from a matrix block to a subsequent powder layer. Then the metal block and the powder are loaded into a mold in a layered structure, vacuumizing is conducted or protective atmosphere is introduced, and then two-stage hot-pressing compounding is conducted; in the first stage, rapid densification and interface pre-combination of the powder are achieved through medium temperature and high pressure; and in the second stage, interface metallurgy diffusion is promoted and interface thermal stress is actively relaxed by adopting high temperature and low pressure. The powder-solid composite unit is used as a base body to be repeatedly stacked, and the multi-layer composite material with the preset number of layers can be prepared layer by layer. The method effectively solves the problems of poor interface bonding, many brittle-hard phases, high residual stress, poor plate shape and the like in a traditional method, and has the advantages of safety, high efficiency, high yield, flexible thickness design, excellent comprehensive performance and the like.

The invention relates to a tool for a turning and milling composite process of a numerical control milling machine and a machining method. The technical problems that in the prior art, the precision accumulated error is large, the auxiliary time is long, or the cost is high, and the expansibility is insufficient are solved. The tool comprises an expansion base. The expansion base is provided with a working cavity and a working area arranged around the working cavity. The working area comprises a reference plane, a base fixing surface, a cutter clamped at the top of the working area, and a base through hole close to the bottom of the working area; a base expansion interface is arranged on the reference plane and is used for additionally installing other processing modules; a cutter handle of the cutter is arranged on the expansion base, and a cutter head faces the working cavity; the base through hole is communicated with the working cavity and is used for guiding oil and removing chips in the working process and expanding the overall weight reduction of the base; the expansion base is used for being fixed to a workbench of a numerical control milling machine, and cylindrical rod parts fixed to a milling cutter chuck are turned through a cutter.

This application provides a method for manufacturing a photovoltaic metal mesh screen, comprising: forming a mask layer with a target pattern on the second surface of a metal substrate, the target pattern including a plurality of hole patterns distributed in an effective area and at least two alignment mark patterns located outside the effective area; chemically etching the second surface of the metal substrate with the mask layer as protection to form a semi-etched hole of depth D1, while simultaneously etching the alignment mark patterns into alignment through-holes penetrating the metal substrate; removing the mask layer; and aligning the semi-etched hole positions from the first surface of the metal substrate based on the alignment through-holes, and using a laser to etch the bottom of the semi-etched hole to form an etched through-hole. The manufacturing method involved in this application optimizes the time-consuming full-process laser processing into a composite process combining chemical etching roughing and laser finishing, significantly shortening the laser processing time of a single mesh screen; reducing the manufacturing cost of a single mesh screen; and achieving high process reliability and pattern accuracy.

This application relates to the field of powder metallurgy technology, and particularly to a modified flake zinc powder, a modification method, an anti-corrosion coating, and a preparation method thereof. The modification method involves stirring flake zinc powder at a speed of 10-40 r / min, spraying an atomized modified dispersion onto the powder during stirring, transferring the flake zinc powder to a horizontal ball mill after atomization, using glass beads as a grinding aid, and dispersing it at a speed of 40-120 r / min for 1-3 hours. The resulting modified flake zinc powder is obtained after sieving. The modified dispersion includes a dispersant and a modifier, wherein the modifier is selected from at least one of silane coupling agents, titanate coupling agents, and fluorocarbon surfactants. The solution provided in this application, through a composite process of atomized coating and dry dispersion, achieves uniform and controllable adsorption of the modifier on the surface of the flake zinc powder, significantly improving the effective utilization rate of the modifier, reducing the amount of modifier and diluent consumed from the source, and producing a modified flake zinc powder with both low oil absorption value and high dispersibility.

The invention discloses an insulating composite material for a new energy motor, and relates to the technical field of insulating materials. The composite material comprises four layers of structures: a first insulation paper layer, a first polyphenylene sulfide film layer, a second insulation paper layer and a second polyphenylene sulfide film layer. The insulation paper is prepared from a sulfate softwood natural-color wood pulp board, nano cellulose crystals and a bio-based waterborne polyurethane dispersion, and the problems that an existing insulation material is insufficient in interface bonding force and prone to aging and deterioration in damp and hot and chemical environments are solved through composition optimization and a composite technology. The composite material has excellent performances of high peel strength, damp-heat aging resistance, gearbox oil resistance, cooling liquid resistance, high electrical strength and the like, is suitable for new energy motors, and particularly meets the use requirements of oil-cooled motors.