496 results about "Composite process" patented technology

The invention relates to the field of screw forming, and discloses a screw cold heading forming process which is characterized by comprising the following steps: step 1, wire preparation and surface pretreatment: based on the requirement of screw forming on the surface quality of raw materials, a metal wire is treated by adopting a mechanical wiredrawing and chemical phosphating and saponifying composite process, and the surface of the metal wire is treated; surface oxide skin is removed, a lubricating film layer is formed, and the forming flowability and the service life of the die in the subsequent cold heading process are effectively improved. A raw material is subjected to spheroidizing annealing treatment in a continuous spheroidizing annealing furnace, internal pearlite is converted into spherical cementite, the ductility and deformation uniformity of the material are improved, then a continuous wire drawing machine is adopted for multi-stage drawing diameter reduction, a three-stage chemical phosphating-saponification treatment process is matched, a low-friction and high-adhesion lubricating film layer is formed, and the service life of the lubricating film layer is prolonged. And a stable material basis and a lubricating environment are provided for the subsequent cold heading process, so that the problems that the friction resistance generated in the forming process of a screw material is large, and a mold is quickly worn are solved.

The invention relates to the technical field of polymer composite materials, in particular to a polycaprolactone-based composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out surface grafting treatment on nano cellulose to obtain modified nano cellulose; mixing the modified nanocellulose, polycaprolactone and a solvent to obtain slurry; carrying out melt blending and granulation on the slurry to obtain composite granules; and carrying out melt blending and granulation on the composite granules, a metal soap stabilizer and a natural resin derivative to obtain the polycaprolactone-based composite material. The polycaprolactone-based composite material prepared by a novel composite process of nano cellulose graft modification-solvent replacement synergetic melt co-extrusion has the core advantages of high mechanical strength, excellent light transmittance, long-acting weather resistance and the like, is good in processing adaptability and simple and convenient to operate, can realize continuous large-scale production, and remarkably reduces energy consumption and raw material cost.

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 invention relates to the technical field of space exploration and lunar soil experiments, in particular to a melting centrifugal type mineral particle morphology remodeling device and a lunar soil glass ball preparation method. The device comprises a mineral protolith high-temperature melting system, a mineral melting slurry conveying system, a centrifugal mineral particle size control system and a mineral particle cooling and morphology remodeling system. The preparation method of the lunar soil glass ball comprises the following steps: adding basalt mineral powder and mineral melting additive powder into a melting centrifugal mineral particle morphology remodeling device to obtain simulated lunar soil glass balls with different particle sizes, and performing morphology transformation on the simulated lunar soil glass balls with different particle sizes by using an ion beam gun. And the lunar soil glass ball state of the impact melting history is reduced. According to the method, high-precision engineering mass production of components, morphology and mechanical properties of the lunar soil glass balls is realized through a fusion centrifugal forming and ion beam surface control composite process, and the problem of soil mechanical behavior deviation caused by morphology distortion of existing simulated lunar soil is solved.

The invention belongs to the technical field of nuclear power, and particularly relates to a nuclear power plant equipment coating heat conductivity coefficient prediction method and device. According to the model building disclosed by the invention, the common defects of pores and macroscopic horizontal cracks in the coating are considered, the coating is used as a tight skeleton, pore and crack three-phase composite system, and after one defect is gradually added into the substrate, the formed system becomes a new substrate in the next step. And repeating the compounding process until the two defects of pores and cracks are added into the system. Therefore, the actual operation state of the thermal barrier coating of the nuclear power equipment can be simulated more vividly. Furthermore, pore shape influence factors and crack shape influence factors corresponding to different porosities and crack rates can be determined through modeling and heat conductivity coefficient simulation calculation, and the actual heat conductivity coefficient of the coating is further predicted. And a theoretical basis is provided for researching the failure behavior of the service thermal barrier coating.

The utility model discloses double-sided coating compound equipment, and aims to solve the problem that the quality of a product is unstable easily due to the fact that a material is inevitably contacted with a guide wheel in the compounding process of the conventional double-sided coating equipment. The equipment comprises a double-sided coating mechanism, a suspension type drying oven, a suspension type steering drying oven, a compounding mechanism and a finished product winding mechanism, wherein the suspension type steering drying oven comprises a steering box, a steering fresh air system inlet, an upper steering air duct and a lower steering air duct, and the upper steering air duct and the lower steering air duct are arranged in the steering box. Through the design that the suspension type steering drying oven is arranged at the outlet of the suspension type drying oven, materials are kept in the middle and are prevented from being in contact with objects under the combined action of wind pressure on the two sides during working, so that the glue surface of material coating is ensured to be intact, the phenomenon that the material operation tension cannot be effectively controlled due to adhesion is improved, and the service life of the materials is prolonged. And the problem of unstable product quality is avoided.

The invention discloses a continuous foaming composite process for a pearl wool coiled material and a waste gas recovery system thereof, and belongs to the technical field of pearl wool processing. Aiming at the problems of low efficiency and waste gas pollution of a traditional intermittent process, the process realizes continuous production through raw material selection (the melt index of LDPE is 1.0-2.5 g / 10min), drying and mixing pretreatment, melting and plasticizing through a twin-screw extruder, injection of foaming agents such as butane under the pressure of 8-12MPa, extrusion foaming at a die head of 140-160 DEG C and combination of air-cooling and water-cooling shaping. The compounding link comprises multiple processes such as hot pressing and co-extrusion to adapt to different base materials, after-treatment is conducted through trimming, taper tension coiling and standing stress release, the product density fluctuation is + / -3%, and the peel strength is larger than or equal to 3 N / cm. According to the waste gas recovery system, negative pressure collection is conducted through a closed gas collecting hood, indirect cooling and alkali liquor spraying pretreatment are conducted, activated carbon adsorption concentration and catalytic combustion purification are conducted, the VOCs removal rate is larger than or equal to 98%, the emission concentration is smaller than or equal to 50 mg / m < 3 >, and efficient production and environmental protection benefits are achieved.

The invention discloses a preparation method of a woven bag, and the preparation method comprises the following steps: nano reinforced phase pretreatment and master batch preparation, woven cloth layer production, functional layer film co-extrusion, multi-layer compounding process, post-treatment and bag making. In the preparation method, modified nano silicon dioxide and nano calcium carbonate are introduced, so that the tensile strength of the woven bag is improved; wherein the surface of the modified nano silicon dioxide is treated by a coupling agent, strong interface bonding is formed between the modified nano silicon dioxide and a polypropylene matrix, and rigid nano particles effectively bear and disperse stress; nano calcium carbonate is dispersed in polypropylene as a rigid filler, molecular chain slippage is hindered, the material rigidity is improved, and meanwhile the impact resistance of the woven bag is improved through reinforcing phase modification and composite structure design.

The invention provides a flame-retardant polyarylester nanofiber and a preparation method thereof, and belongs to the field of polyarylester nanofibers.The preparation method comprises the steps that PAR particles and a flame retardant are subjected to plasma treatment, and activated PAR and an activated flame retardant are obtained; melting the activated PAR particles, adding an activated flame retardant, shearing and mixing to obtain a blended melt, extruding through a spinneret plate, cooling and winding to obtain nascent fibers; shearing the nascent fibers into short fibers, and carrying out ball milling by taking absolute ethyl alcohol as a medium to obtain a fiber suspension; and adding an activated flame retardant and an initiator into the fiber suspension for reaction, and carrying out suction filtration, washing and vacuum drying to obtain the flame-retardant polyarylester nanofiber. According to the invention, an innovative'plasma synergistic activation-melt blending-free radical grafting 'composite process and a flame retardant molecular-level bonding formula are adopted, so that the problems of the traditional physical blending flame-retardant fiber in the aspects of dispersity, mobility and interface bonding strength are effectively solved.

The present application relates to a kind of high-temperature-resistant inductive angle sensor, belong to angle sensor technical field.The sensor includes: gradient composite ceramic substrate Al2O3-ZrO2-Al2O3, realize thermal expansion coefficient gradient matching by intermediate layer zirconium oxide doped yttrium oxide, reduce thermal stress cracking risk;Substrate surface is formed with micro-arc oxidation porous layer in turn titanium nitride nanocrystalline layer, improve surface bonding force;Atomic layer deposition process is used to prepare TiN or TiN / Ag composite film coil, improve temperature resistance;Through electron beam welding and transient liquid phase bonding composite process coil and circuit;Insulating encapsulation layer is made of boron nitride nanosheet and high-temperature-resistant resin, improve thermal conductivity and breakdown field strength.The present application is through gradient substrate design, thin film coil integration and composite process optimization, solves the thermal stress failure of traditional inductive sensor under high temperature, coil oxidation and insulation aging problem, suitable for angle measurement under extreme environment.

The invention provides a laser marking, transition line shaping and post-welding detection machine which is applied to the technical field of motor equipment machining and comprises a machine table, the top face of the machine table is a machining face, and a stator is carried and machined on the machine table; the stator carrying assembly is a manipulator; the stator cleaning assembly is used for cleaning the stator; the stator laser marking assembly comprises a second linear module, a second material carrier, a laser marking machine, an air blowing and dust collecting piece and a code scanning machine; the second material carrier is arranged on the second linear module, the stator is moved by the second material carrier along with the second linear module, and the laser marking machine, the blowing dust collection piece and the code scanning machine are located on the two sides of the second linear module; the device is a composite process device integrating laser precise marking, intelligent transition line shaping and multi-mode post-welding detection functions, achieves a mutual smooth carrying effect, and is non-pause and non-waiting-stop device.

The utility model relates to the technical field of shoe material, concretely is a kind of one body fuse adds to add the formula vamp of down, this vamp includes lining and warm capsule, the warm capsule is formed on lining using seamless hot melting process, and warm capsule includes capsule body, the capsule body is the cavity structure with open inside hollow in lower end, warm down is filled in the cavity, the lining is located the lower end surface of warm capsule, and warm down is encapsulated in capsule body, the capsule body includes outer covering layer and inner covering layer, and adhesive layer is set between outer covering layer and inner covering layer, and outer covering layer and inner covering layer are formed together by composite process. The utility model has simple structure, reasonable in design, and good evenness of down filling, and simultaneously production efficiency is high, and filling down is good, and warm-keeping is good.

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 discloses a degreasing sintering furnace and a gas control method thereof, relates to the field of heat treatment equipment, and adopts the technical scheme that the degreasing sintering furnace comprises a dual-mode inert gas supply system and an independent air supplement system. Wherein the inert gas supply system comprises a first pressure supplementing pipeline communicated with the furnace bottom, and the first pressure supplementing pipeline is used for rapidly replacing air from bottom to top; and the second pressure supplementing pipeline is communicated with a suction inlet of the centrifugal fan of the hot air circulating system and is used for forcibly premixing the supplementing gas and the circulating hot air. And the independent air supplementing system is used for accurately supplementing trace oxygen-containing gas. By means of the collaborative design, efficient gas replacement is achieved, and the process period is shortened; furthermore, by eliminating thermal shock in the air supply process, extremely high temperature field uniformity is maintained, and the product yield is improved; and meanwhile, controllable composite process gas can be constructed to execute advanced sintering processes such as interface modification, so that the product performance is fundamentally improved.

The invention provides a slit extrusion coating head and a method for preparing an HIPE (High Impact Polyethylene) foam material by using the same, the slit extrusion coating head comprises an upper die lip and a lower die lip, the upper die lip and the lower die lip are arranged in parallel and form an extrusion slit, and the roughness of the upper die lip and the roughness of the lower die lip are different. The slit extrusion coating head provided by the invention can be used for preparing the HIPE foam material with the gradient aperture through single-time extrusion, multi-layer compounding is not needed, the process is simple, and the cost is greatly reduced; the HIPE foam material with gradient aperture prepared by using the slit extrusion coating head provided by the invention can avoid the problem of interlayer separation existing in a multi-layer composite process.

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 invention relates to continuous composite production equipment for a blowing plate strip, which comprises a first uncoiling mechanism, a second uncoiling mechanism, a first roughening mechanism, a second roughening mechanism, a printing mechanism, a first heating mechanism, a second heating mechanism, a composite mechanism and a coiling mechanism, the first strip material and the second strip material are subjected to uncoiling, roughening, printing, heating and hot-rolling compounding through a continuous production method, namely a continuous production process to form the composite strip material, and the continuous compounding non-stop production process not only improves the production efficiency, but also simplifies the process flow and reduces the production cost. By means of the continuous composite technology, the problem that in the prior art, the production efficiency is low due to the fact that composite is conducted one by one after blanking is solved, and efficient and continuous composite production of the blown plate strip is achieved. And moreover, through continuous compounding of the rolls, cutting can be performed according to the required size after compounding, the required size can be a large size, the requirement for obtaining the large-size huffing plate is met, and the quality and the performance of the product are ensured.

The embodiment of the invention discloses a conductive component for outdoor communication equipment. According to one specific embodiment, the conductive part comprises a conductive layer and a sealing layer, the sealing layer is integrally formed, and the sealing layer is of a hollow tubular structure; the conductive layer comprises a first conductive layer, a second conductive layer and a third conductive layer; the second conducting layer is in composite connection with the outer side face of the sealing layer through a transition layer composite technology, the transition layer composite technology comprises the steps that transition layer raw materials and raw materials of the second conducting layer are mixed in an extruder, a mixed material is obtained, and the transition layer raw materials comprise a compatilizer; performing extrusion molding treatment on the mixed material and the raw material of the sealing layer to obtain a primary composite product, and combining the compatilizer with the raw material of the sealing layer to form a transition layer; the first conductive layer coats the outer side surface of the second conductive layer; the third conductive layer is coated on the inner side surface of the sealing layer. According to the embodiment, the electromagnetic shielding effect of the conductive part can be improved through the conductive layer, and then the signal transmission quality of the outdoor communication equipment is improved.

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.

The invention relates to a heat preservation construction method for a space double-curved-surface shell structure. The heat preservation construction method is suitable for complex three-dimensional curved-surface structures such as snowmobile and sleigh racing tracks. The method adopts a composite process of mainly spraying polyurethane and assisting local polyurethane plates, and comprises the following steps: firstly, pre-installing polyurethane plates in corner angle areas such as a special-shaped support and a cornice, and then carrying out multi-layer polyurethane on-site spraying on double-curved-surface shell subareas of space at the back and the bottom of a racing track, with the thickness of each layer being less than or equal to 20mm; in the spraying process, the thickness is measured in real time through a probe and dynamically adjusted till the total thickness reaches the design value and the error is smaller than or equal to + / -10 mm; and finally, trimming and cutting the surface and edges and corners, leveling and constructing a protective layer. According to the method, the thermal insulation layer which is integrally continuous, free of cold seams, accurate in thickness and clear in local corner angle is formed at a time, the problems that a complex curved-surface thermal insulation layer cannot be spliced and cannot be measured accurately, and a cold bridge exists are thoroughly solved, refrigeration energy consumption is remarkably reduced, the ice surface quality is improved, and the method is successfully applied to the snowmobile sleigh center of Beijing winter America.

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 invention relates to a copper material hot forging-cold heading composite technology based on an integrated forming device, and relates to the field of conductive copper part machining, the copper material hot forging-cold heading composite technology comprises the steps of feeding and heating, hot forging primary forming, collaborative switching, cold heading final forming, discharging and the like, in the collaborative switching step, an integrated driving mechanism has different driving modes, and a temperature control step is arranged between the hot forging step and the cold heading step. The temperature is controlled through the water-cooling heat insulation plate, the cold air nozzle and the like, the punch and the pressing block are controlled to work alternately through the hydraulic cylinder, and all the steps are coordinated through the PLC control system. The copper material hot forging-cold heading composite technology integrated forming device achieves the technical effects that copper material hot forging-cold heading composite technology integrated forming is achieved, the workpiece temperature is effectively controlled, the shaping and hardening effects are guaranteed, and the production efficiency and the product quality are improved.

The present invention discloses a nursing pad with a gradient absorption structure and a composite process thereof, relating to the field of nursing pads. The nursing pad comprises: a flow-guiding surface layer, an absorption layer, a water-locking support layer, a microchannel layer, and a PE film bottom layer, which are composited in sequence from top to bottom; the absorption layer comprises low-crosslinked SAP and fluff pulp, and has a thickness of 3-4 mm; the water-locking support layer comprises high-crosslinked SAP, PVA fiber, and hot-melt adhesive powder, and has a thickness of 2-3 mm; the density of the absorption layer is 0.1-0.15 g / cm 3 The density of the water-locking support layer is 0.3-0.4 g / cm 3 , used to form a density gradient structure from the absorbent layer to the water-locking support layer. By building on the rapid water absorption properties of the low-crosslinked SAP in the absorbent layer, combined with the highly crosslinked SAP and the rigid network of PVA fibers in the water-locking support layer, a gradient density structure of soft core and hard shell is formed. This avoids the uneven thickness problem caused by the disordered accumulation of SAP in traditional homogeneous structures, thereby further improving the fit of the nursing pad to the skin and reducing the risk of pressure sores caused by localized pressure concentration.

The application relates to the technical field of glass surface printing, and discloses a UV nano-imprint superposition 3D printing composite device and a process thereof, which comprises a bottom plate, a nano-imprint mechanism arranged on the bottom plate, and a 3D printing mechanism arranged above the nano-imprint mechanism; the 3D printing mechanism is fixed on the bottom plate; the 3D printing mechanism comprises a frame structure composed of a vertical rod and a horizontal rod; a moving trolley is arranged on the horizontal rod at the upper end of the frame structure; a fixing rod is arranged between the two moving trolleys; a moving trolley is also arranged on the fixing rod, and a 3D printing nozzle and a UV light curing device are arranged on the moving trolley. The glass surface is subjected to nano-imprint through the nano-imprint mechanism, then the 3D printing nozzle and the UV light curing device on the moving trolley are used to perform curing and 3D printing in sequence, so that the color pattern and the embossing texture are ensured to be manufactured, the complex and tedious color matching operation is not needed, the product scrappage rate is low, and the cost is low. The application also provides a UV nano-imprint superposition 3D printing composite process.

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.