24 results about "Microwave curing" patented technology

The invention relates to the technical field of sand mold casting, and particularly discloses a gradient exhaust sand mold for an aluminum alloy thin-walled workpiece and a preparation method thereof.The sand mold comprises a cavity surface layer (with the hardness ranging from 90 HB to 95 HB), a transition layer (with the hardness ranging from 80 HB to 70 HB and a back sand layer (with the hardness ranging from 60 HB to 65 HB) which are arranged from inside to outside, and microporous ceramic exhaust rods (with the diameter ranging from 0.3 mm to 0.8 mm and the distance ranging from 1 mm to 3 mm) are embedded in the cavity surface layer; the exhaust rod is composed of a mullite fiber matrix and a nanometer gamma-AlO coating, the porosity is 40-50%, and the exhaust rod penetrates through the back sand layer to form a directional exhaust network. The preparation method comprises the following steps: mixing sand layer by layer (the cavity layer contains 1.0-1.5% of phenolic resin, and the back sand layer contains 0.4-0.6% of resin and 4-6% of starch); when sand is filled to the position 1-3 mm away from the surface of the cavity, an exhaust rod is implanted (the positioning precision is + / -0.1 mm); gradient compaction is carried out (the high pressure of a cavity is 3.0-4.0 MPa, the vibration of a transition area is 20-30 Hz, and the back sand airflow is 0.1-0.2 MPa); and carrying out microwave curing (2.5 to 3.5 kW, 60 to 120 s). The defects of hot cracks and air holes of the thin-wall part (smaller than or equal to 5 mm) are overcome synchronously, and the casting yield is increased to 95% or above.

The invention relates to a microwave curing concrete based on carbon mineralization wave-absorbing functional aggregate and a preparation method thereof, the microwave curing concrete comprises the following raw materials by weight: 350-400 parts of cement, 40-50 parts of fly ash, 40-50 parts of silica fume, 530-903 parts of carbon mineralization wave-absorbing functional aggregate, 0-414 parts of gravel, 691-712 parts of river sand, 1.5-3.0 parts of a water reducer, 12-20 parts of a nano magnetic fluid functional component, and 134-183 parts of water. Through composite application of the carbon mineralization wave-absorbing functional aggregate and the nano-magnetofluid functional component, the carbon mineralization wave-absorbing functional aggregate mainly provides skeleton type macroscopic wave absorption, the nano-magnetofluid functional component provides diffuse type nano-scale wave absorption, and the carbon mineralization wave-absorbing functional aggregate and the nano-magnetofluid functional component jointly construct an efficient and uniform microwave absorption network on different scales. The microwave energy utilization rate is obviously improved, the microwave curing performance of the concrete can be effectively improved, and the early mechanical property, the long-term strength and the durability of the concrete are improved.

The invention belongs to the technical field of textile fabrics, and particularly relates to an anti-pilling wool tencel fabric and a preparation method thereof. The anti-pilling wool tencel fabric comprises a core layer fiber raw material, a sheath layer fiber raw material, a composite bio-enzyme finishing liquid and a composite cross-linking finishing liquid, wherein the fiber raw materials of the core layer comprise 40-60 parts of wool fibers, 30-50 parts of tencel fibers and 5-15 parts of polyester fibers with special-shaped sections; the fiber raw materials of the sheath layer comprise 20-40 parts of wool fibers and 50-80 parts of tencel fibers; according to the invention, wool fibers which are easy to pilling are isolated through the core-sheath structure, and migration and slip-out of the fibers are reduced through the supporting effect of the internal skeleton; in the finishing process, a composite bio-enzyme and composite cross-linking synergistic effect is adopted, the washing step after enzyme treatment is omitted, the ideal surface state of the fibers is reserved to strengthen the cross-linking effect, uniform and compact combination is ensured in cooperation with a microwave curing technology, and long-acting anti-pilling protection is formed.

The invention discloses a high-porosity low-thermal-conductivity cement aerogel plate and a preparation method thereof, and belongs to the technical field of preparation of aerogel materials. The method comprises the following steps: preparing nano water-saturated resin from sodium polyacrylate alkali-resistant water-absorbent resin, mixing the nano water-saturated resin with cement, silica fume and other raw materials, and performing strickling or spray layering molding and microwave heating curing to obtain a finished product. Through the synergistic effect of the nanometer sacrificial template and microwave curing, the porosity of the product is larger than or equal to 96%, the heat conductivity coefficient is smaller than or equal to 0.026 W / (m.K), the compressive strength is larger than or equal to 0.8 MPa, the problems that in the prior art, the porosity is insufficient, the heat conductivity coefficient is high, the period is long, and performance is difficult to consider are solved, the process is simple and controllable, and the method is suitable for large-scale application of building heat preservation.

The application belongs to the technical field of textile fabrics, and particularly relates to an anti-pilling wool tencel fabric and a preparation method thereof; wherein the anti-pilling wool tencel fabric comprises core layer fiber raw material, sheath layer fiber raw material, composite biological enzyme finishing liquid and composite crosslinking finishing liquid; wherein the core layer fiber raw material comprises 40-60 parts of wool fiber, 30-50 parts of tencel fiber and 5-15 parts of profiled cross-section polyester fiber; the sheath layer fiber raw material comprises 20-40 parts of wool fiber and 50-80 parts of tencel fiber; the application isolates the wool fiber prone to pilling through a core-sheath structure, and reduces the migration and sliding of the fiber through the supporting action of the internal skeleton; in the finishing process, the composite biological enzyme and the composite crosslinking are used in a synergistic action, the washing step after enzyme treatment is omitted, the ideal surface state of the fiber is retained to strengthen the crosslinking effect, the microwave curing technology is matched to ensure uniform and dense combination, and long-acting anti-pilling protection is formed.

The invention belongs to the technical field of food preparation, and particularly relates to a method for preparing salted egg yolk powder by using a differential frequency microwave curing method, and the preparation method comprises the following steps: S1, pretreating egg yolk to obtain an egg yolk liquid; s2, preparing the salted egg yolk liquid; s3, preparing egg yolk pickling liquid; s4, performing high-speed centrifugal treatment and high-frequency microwave curing on the egg yolk pickling liquid by using a centrifugal machine to obtain oiled egg yolk particles; s5, performing rotary granulation on the oiled egg yolk particles; and S6, performing low-frequency microwave drying and superfine grinding. The salted egg yolk powder which is good in flavor, sufficient in nutrition and stable and excellent in quality can be obtained and can be widely applied to the fields of leisure food seasoning, catering seasoning and the like.

The invention relates to the technical field of composite materials, in particular to a preparation method of a microwave curing aramid paper high-performance insulating composite material. The high-performance insulating composite material prepared by the method comprises a modified insulating film framework layer, wherein an adhesive layer and a modified aramid paper layer are sequentially arranged on the two sides of the modified insulating film framework layer outwards; wherein the modified aramid paper is subjected to low-temperature plasma treatment and grafting modification with a silane coupling agent, and the modified insulating film framework layer is coated with slurry containing KH-550 modified nano silicon dioxide. The high-performance insulating composite material prepared by the invention not only has the high temperature resistance and puncture resistance of aramid paper, but also has the characteristics of high strength, large stiffness and good insulation of an insulating film, can be widely applied to motor stator insulation of a new energy automobile, and is an indispensable key material for the new energy automobile.

The application discloses a kind of carbon fiber resin matrix composite microwave curing simulation simulation method, it is related to microwave curing technical field.Utilize maxwell equation group, heat transfer, curing reaction kinetics and multi-field coupling theory create curing reaction to establish theoretical model, further import parameter into numerical simulation software COMSOL or Ansys software and carry out finite element analysis, obtain the electromagnetic field distribution, temperature field distribution and curing degree field distribution nephogram in each stage of curing reaction process, can provide effective theoretical support for the microwave curing mechanism research of carbon fiber resin matrix composite, and provide a large number of basic data and optimization scheme for its actual microwave curing process optimization.

This invention pertains to the manufacturing technology of cardboard boxes, and particularly relates to an insulated cardboard box material and its preparation method. The method includes: (1) mixing organic polymer, isocyanate, organic zirconium, silane and weak acid in a certain proportion to prepare a polymer precursor; (2) electrospinning and drying to prepare polymer fibers; (3) mixing polymer fibers, silane reagent, acyclic carboxylic acid and fatty ketone in a certain proportion to prepare a polymer fiber colloid; (4) adding the polymer fiber colloid to the pulp in a certain proportion during the pulping process of the cardboard box, and obtaining the insulated cardboard box material through conventional treatment. This invention provides a fiber material with good heat insulation effect and modifies it so that the fiber can be used in the preparation of insulated cardboard boxes. Through the microwave curing process of polymer fiber colloid, the mechanical properties of the insulated cardboard box are improved, and the energy dissipation inside the insulated cardboard box and the absorption and reflection of infrared radiation are optimized.

This invention relates to the field of adhesive bonding and repair of aircraft structural composite materials, specifically a method for rapid repair of aircraft cracks based on VIMP-microwave technology. The specific steps are as follows: S1, determine the solution; S2, grind; S3, prepare and cut materials; S4, prevent potential corrosion; S5, connect to vacuum; S6, water bath heating; S7, bond; S8, fill the mold; S9, absorb microwaves; S10, cure; S11, secondary grinding. This invention combines the VIMP process with microwave curing technology. By readjusting the adhesive formulation, it shortens the repair operation time and adhesive curing time. Simultaneously, the repair platform can be integrated into a field repair kit for easy transport during emergency repairs.

The application discloses a kind of steel slag cement concrete accelerated curing methods based on three-stage microwave control, including preparation steel slag cement concrete mixture C, after pouring out mixer of prepared steel slag cement concrete mixture C, uniform pouring into test mould, sequentially carried out initial microwave accelerated curing, mid-term microwave curing and later microwave curing in microwave curing equipment;After the end of later curing, concrete component is removed from microwave curing equipment and can be demoulded, then natural cooling to room temperature can complete curing;Three-stage microwave curing strategy is used, by accurately regulating and controlling microwave frequency, power, temperature and heating rate and other parameters of each stage, realize the rapid, uniform heating of concrete, effectively promote the hydration reaction of each component in steel slag cement concrete, accelerate the strength development of concrete, while it can realize efficient, energy-saving, environmental protection curing effect.

The application discloses a low-energy-consumption microwave-assisted prefabricated brick rapid curing device, which comprises a heating curing box, a heat exchange recovery mechanism and a low-energy-consumption microwave generator, low-energy-consumption microwave generators are arranged at the two ends of the outer side of the heating curing box, the low-energy-consumption microwave generator adopts a high-efficiency solid-state microwave power amplifier, a heating cavity is arranged in the heating curing box, a heat-conducting corrugated metal sheet is arranged on the top wall of the heating cavity, and heat gathering grooves are arranged on the top of the heating curing box. The low-energy-consumption microwave-assisted prefabricated brick rapid curing device uses the heating cavity of the heating curing box as a prefabricated brick curing space, uses the low-energy-consumption microwave generator as a core component for generating microwave energy, and transmits the microwave energy generated by the low-energy-consumption microwave generator into the heating cavity under the guidance of the inner side waveguide metal pipe, radiates the microwave energy into the heating cavity, and performs microwave curing on the prefabricated bricks on the inner side.

This invention discloses a device for manufacturing harmless precast building materials from solidified fly ash products. The device comprises a fly ash pretreatment system, an aggregate supply system, a binder supply system, a mixing and micro-encapsulation system, a molding system, a microwave curing system, and a sensing and control system connected in sequence to each system. After screening and drying, the fly ash is premixed with electrostatically treated multi-grade aggregates in the fly ash adsorption chamber of the aggregate supply system. The premixed material enters the mixing and micro-encapsulation system, where it is mixed with asphalt and resin supplied by the binder supply system. Simultaneously, an encapsulating agent is sprayed through atomizing nozzles for micro-encapsulation. The mixture is pressed into a blank in the molding system and rapidly cured into harmless precast building materials in a microwave curing sealed chamber. This invention achieves intelligent linkage throughout the entire process through the sensing and control system, combined with a multi-layer sealing structure, solving the problems of long curing cycles, high energy consumption, and lack of system integration in existing technologies, thus realizing the efficient and clean resource utilization of hazardous fly ash.

The invention belongs to the technical field of paper packing materials, and discloses a paper packing material strengthening process which comprises the following steps: taking ultra-thin corrugated paper of which the quantitation is less than or equal to 80g / m as a raw material; the method comprises the following steps: physical ultrasonic activation or chemical oxidation activation of fibers, fine screening of fibers, compounding and adding of an environment-friendly reinforcing agent, additional addition of a retention aid, control of corrugated forming parameters, preparation of a double-sided differentiated coating, addition of a specific auxiliary agent, low-temperature hot air curing and infrared curing or microwave curing, and recovery of waste heat of steam tail gas in the curing process. A wear-resistant additive is added into an outer surface coating, surface tension is controlled to guarantee printability, finally, the advantage of light weight is kept, meanwhile, ring crush strength is improved by more than or equal to 30%, edge crush strength is improved by more than or equal to 25%, the environmental protection index reaches the standard, and the purchase cost can be reduced by more than 25%. The method adapts to existing equipment and multiple application scenes, and industrialization can be rapidly achieved.

The invention discloses a construction method of a quick repair material prepared from concrete waste in an expansion joint anchoring area, which comprises the following steps: firstly, preparing powder and crushing concrete chiseled off on site by using a crusher to obtain fine waste with the particle size of less than or equal to 2.36 mm and 2.36 mlt; the particle size of the coarse waste is smaller than or equal to 25 mm; uniformly mixing the powder with a certain amount of fine waste and water-borne epoxy resin modified graphene oxide, adding a curing agent and water, uniformly mixing, and pouring into the chiseled working surface of the anchoring area of the expansion joint to fill the hole; uniformly mixing the powder with a certain amount of coarse waste and waterborne epoxy resin modified graphene oxide, adding a curing agent, the powder and water, uniformly mixing, pouring into a working surface, vibrating, finishing the surface, and performing microwave curing for 40-60 minutes. According to the construction method of the rapid repairing material, the plugging material and the concrete in the anchoring area are formed respectively, so that the cracking resistance and the impact resistance of the rapid repairing material are improved, the interface bonding strength and toughness of the rapid repairing material and the anchoring area of the bridge expansion joint to be repaired are improved, and the maintenance time is short.

The utility model discloses microwave curing equipment for a graphene composite material, and belongs to the field of graphene materials. The problems that curing is not uniform and the adjusting efficiency is low are solved. The jacking blocks are driven to move by rotating the lead screw, and then the inclination angle of the adjusting plate is adjusted, so that the layout of a composite material is changed, local hot spots are reduced, the graphene load material is heated more uniformly, the curing effect is effectively improved, the multiple jacking blocks are driven by rotating the lead screw to move synchronously, and the curing efficiency is improved. On one hand, batch curing is achieved through the multiple adjusting plates, the processing efficiency is effectively improved, on the other hand, the multiple adjusting plates are adjusted at the same time, and the adjusting efficiency of the adjusting plates is effectively improved.

The invention discloses a microwave curing device for prefabricated brick production, and relates to the technical field of prefabricated brick production. The microwave curing device for prefabricated brick production comprises a processing box, a bottom plate, a transverse moving structure, a rotating structure, a locking structure and an adjusting structure, a U-shaped material plate is arranged on the processing box, sealing cover plates are fixedly installed on the two sides of the U-shaped material plate, a partition plate is fixedly installed on the top of the U-shaped material plate, and two sets of material discs distributed left and right are arranged on the U-shaped material plate. According to the microwave curing device for prefabricated brick production, the charging tray can be driven to rotate during microwave heating, so that prefabricated bricks on the trays can be uniformly and fully subjected to microwave heating, the curing uniformity of the prefabricated bricks is improved, and the situation that the curing speeds of the prefabricated bricks in the same batch are inconsistent is avoided; and the other group of bottom plates can be replaced when the prefabricated bricks are processed on one group of bottom plates, so that the material replacement does not occupy extra time, and the processing efficiency is effectively improved.

According to the method, firstly, a composite gel system formed by mixing gellan gum and konjac glucomannan according to a specific proportion and stabilizing sunflower seed oil in cooperation with whey protein is constructed, a three-dimensional network structure with a synergistic enhancement effect is formed, and the water binding capacity and swallowing suitability of a product are remarkably improved; secondly, the surimi is subjected to enzymolysis softening by adopting alkaline protease at a proper temperature, so that the texture hardness is effectively reduced, and the protein digestion and absorption rate is improved; on the basis, potassium chloride partially replaces sodium chloride, curdlan is combined to construct a gel network, and multiple technologies such as microwave curing and high hydrostatic pressure sterilization are cooperated, so that the sodium ion release and distribution uniformity is systematically enhanced, and good salty taste perception is maintained while the salt is reduced by 30% or above; according to the method, the swallowing safety, the flavor fullness and the storage stability of the product are perfectly considered while the sodium content is remarkably reduced, and an ideal dietary choice is provided for people with dysphagia.

The application relates to the technical field of building technology, and discloses a building waste fiber mixing reinforced solidifying agent aggregate paving process, which comprises the following steps: S1, bottom load layer construction: mixing II-grade building waste recycled aggregate, natural coarse aggregate, polypropylene fiber, slag powder and a bottom layer solidifying agent, uniformly stirring and then paving, and adopting a multi-field coupling compactor to first roll in an impact mode; S2, middle layer transition layer construction: mixing I-grade building waste recycled aggregate, fly ash ceramsite, modified basalt fiber and a middle layer solidifying agent, uniformly stirring and then paving, and statically pressing with a road roller; S3, surface functional layer construction: mixing asphalt recycled aggregate, cement, sand, nano calcium carbonate, water and basalt short-cut fiber, uniformly stirring and then paving, statically pressing with a road roller, and heating with a microwave curing device.

The invention belongs to the technical field of supercapacitors, and relates to a CoNi2S4-P-CNT composite electrode-based all-solid-state supercapacitor and a preparation method thereof, a cobalt source, a nickel source and thiourea are used as sulfur sources, a phosphorene-carbon nanotube composite dispersion liquid is combined, and the CoNi2S4-P-CNT composite electrode is prepared through a gradient hydrothermal-vulcanization-freeze drying-annealing process; the composite gel electrolyte is prepared by taking polyethylene glycol as a gel matrix, lithium bis (trifluoromethanesulfonimide) as an ion source and nano SiO2 as a reinforcing agent through an ultrasonic dispersion-microwave curing process; and the two components are assembled into the all-solid-state symmetric supercapacitor. According to the invention, a three-dimensional conductive network of the composite electrode and a gel electrolyte ion channel are constructed synergistically, the limitation of single component optimization is broken through, phosphorene bridged CoNi2S4 and carbon nanotubes form an efficient electron transport network, nano SiO2 constructs an ion channel in gel, and electron conduction and ion transport efficiency are improved synergistically with the phosphorene bridged CoNi2S4 and the carbon nanotubes.

Bonded untreated plastic substrates and process for manufacturing same, including a variable frequency microwave and variable frequency microwave active welding paste. Use of 1-component variable frequency microwave cured paste adapted to wet and bond untreated plastic substrates that is operable to reduce production cycle time, reduce production costs, reduce operating costs, and reduce production line space. Hardening of the welding paste allows joining of thermoplastic panels quickly without the need for panel surface treatment. Polypropylene substrate bonding with 1-component epoxy adhesive that is variable frequency microwave reactive, wherein the substrates are untreated.

The invention relates to the technical field of floors, in particular to a super wear-resistant anti-skid composite floor material and a preparation method thereof. The super wear-resistant anti-skid composite floor material sequentially comprises a surface layer, a reinforcing layer and a base plate layer from top to bottom, the raw material of the reinforcing layer comprises an elastic adhesive, the surface layer is formed by multiple coating and gradient curing of a modified PU adhesive, and the curing process comprises a thermocuring stage and a microwave curing stage at 100-150 DEG C; aiming at the problem of poor wear resistance and skid resistance of the existing composite floor material, the long-term skid resistance and wear resistance of the composite floor material are remarkably improved, and the defect that the floor material is easy to delaminate and crack due to long-term frequent use is overcome.

This utility model discloses a microwave vacuum synthetic leather pre-curing device, comprising: a vacuum curing chamber, with magnetrons fixedly connected to both sides of the top of the vacuum curing chamber, waveguides provided at the output ends of the magnetrons, a first motor fixedly connected to the middle of the top of the vacuum curing chamber, a threaded column fixedly connected to the drive end of the first motor, a threaded plate threadedly connected to the outer side of the threaded column, a lower pressure plate fixedly connected to both ends of the bottom of the threaded plate, sliding rods slidably connected to both ends of the threaded plate, the top ends of the sliding rods being fixedly connected to the vacuum curing chamber, and fixed plates fixedly connected to the upper sides of both sides of the vacuum curing chamber. Driven by a second motor, the threaded rods rotate, engaging with the threaded blocks to achieve threaded movement, thereby causing the sealing plate to descend. This facilitates the insertion of the sealing plate into the interior of the insertion base plate, achieving a sealing effect, thus realizing microwave curing in a vacuum environment.

The invention discloses a flue gas dust removal and denitration method and system based on a catalytic filter bag, and belongs to the technical field of flue gas treatment. According to the method, after ammonia is prepared through urea pyrolysis and rotational flow mixing, dust removal and denitration are synchronously completed through a specially-made catalytic filter bag. The catalytic filter bag is prepared by adopting a unique vacuum impregnation and microwave curing process, a three-layer composite structure sequentially comprising a V2O5-WO3 catalytic layer, a nano TiO2 carrier layer and a PTFE filter layer from outside to inside is formed, and the combination of high activity and high filter efficiency is realized. The dust removal and denitration functions are fused through the catalytic filter bag, and the equipment investment is reduced; an SCR reactor is not needed, the comprehensive energy consumption is reduced, and the energy consumption is obviously reduced; the catalyst enters the fiber through vacuum impregnation, so that the surface is prevented from falling off; through microwave gradient curing, the V2O5-WO3 active phase is formed at the temperature of 220 DEG C or below, and the low-temperature curing breakthrough is achieved.