42 results about "Volumetric Mass Density" patented technology

A structure and method of forming same, comprising a low threading density alloy graded layer, deposited according to a deposition temperature profile in correspondence with increasing alloy composition. In one embodiment, a first substantially relaxed alloy graded layer is deposited while varying a deposition temperature according to a first temperature profile. A second substantially relaxed alloy graded layer is deposited over the first graded layer while varying a deposition temperature according to a second temperature profile. Preferably, the minimum signed rate of change of the second temperature profile is less than the maximum signed rate of change of the first temperature profile.

The invention relates to a control method of inclusions in a thick steel plate used for high heat input welding, which is characterized by adding a deoxidizing agent during steel liquid pouring, wherein the components and adding order of the deoxidizing agent are as follows: Mn and Si, Al, Ti, Ca and Mg; the Mg content is 0.0005-0.007%, when Mg is added for deoxidizing, the oxygen content in steel liquid needs to be adjusted and precisely controlled through adding Fe2O3 powder to a casting ingot mold, and the adding amount of the Fe2O3 powder is such that the oxygen content in the steel liquid is maintained at 0.001-0.008%; the Al content in steel is lower than 0.006%; the ratio of the inclusions with size smaller than 3mu m in the steel liquid is not lower than 80%, and the surface density of the inclusions is not smaller than 300 inclusions/mm<2>; the main components in the center of the inclusions are MgO or MgO and Ti2O3, and the main component on the external surface of the inclusions is MnS. The inclusions formed by using the method provided by the invention can favorably inhibit the growth of austenite crystal in a welding heat-affected zone and promote the growth of intracrystalline ferrite, thus improving the high heat input welding performance of the thick plate.

The invention provides a method of forming a dense, shaped article, such as a crucible, formed of a refractory material, the method comprising the steps of placing a refractory material having a melting point of at least about 2900° C. in a mold configured to form the powder into an approximation of the desired shape. The mold containing the powder is treated at a temperature and pressure sufficient to form a shape-sustaining molded powder that conforms to the shape of the mold, wherein the treating step involves sintering or isostatic pressing. The shape-sustaining molded powder can be machined into the final desired shap and then sintered at a temperature and for a time sufficient to produce a dense, shaped article having a density of greater than about 90% and very low open porosity. Preferred refractory materials include tantalum carbide and niobium carbide.

The invention relates to a low-density high-intensity ceramsite fracturing propping agent and a preparation method thereof. The low-density high-intensity ceramsite fracturing propping agent has a core material body which is composed of the following materials in percentage by weight: 30-40% of bauxite, 10-15% of talcum, 10-12 % of mullite, 12-15% of metakaolin, 6-15% of potassium feldspar, 3-6.5% of titanium dioxide, 1-3% of manganese powder, 3-4.5% of nano calcium carbonate, 2.5-3.5% of iron trioxide and 2.5-3.5% of magnesium orthosilicate; a gel breaker layer is arranged outside the core material body, and the gel breaker layer is sequentially coated with an external coating and a lubricant layer. When in preparation, various materials are firstly ball-milled, sieved and graded, and then matched in different ways; the potassium feldspar and the titanium dioxide both can reduce reaction temperature to a certain extent; the added manganese powder mainly plays a role in catalyzing; the nano calcium carbonate plays a role in reducing density of product; sintering temperature needed by the product is 1250 DEG C; the product is low in density, strong in anti-fracture capacity and high in sphericity; and meanwhile, the production technology is simple and easy to popularize and implement.

The water solution of bee glue includes the following steps: mixing bee glue and 95 % concentration alcohol solution via stirring, adding to water at 50-100 deg.c to obtain mixed water solution of bee glue and alcohol with alcohol content of 20-60 %, cooling to room temperature, letting stand and filtering; recovering alcohol and filtering to obtain filtrate; repeated alcohol dissolving and filtering of the filter residue and deposited matter to obtain filtrate; merging filtrate, concentration at 80 deg.c or adding water to density of 1.01-1.04, cooling, filtering to obtain the water solution of bee glue. The alcohol dissolving and water extracting process is simple, and the water solution of bee glue has high flavone content, no organic solvent and additive, low preparation cost and good biological effect. The water solution of bee glue may be used in preparing products for lowering blood sugar, lowering blood fat, resisting inflammation and regulating immunity.

The invention relates to a filter, which comprises a filter shell, wherein the upper part of the filter shell is provided with an air inlet pipe, and the lower part of the filter shell is provided with a blow-off pipe. The filter is characterized in that a filter core is arranged inside the filter shell and comprises an upper supporting plate and a lower supporting plate; a foldable annular filter screen is arranged between the upper supporting plate and the lower supporting plate; an air outlet pipe is arranged on the lower supporting plate; an air outlet end of the air outlet pipe is extended out of the filter shell; the foldable filter screen is arranged between the upper supporting plate and the lower supporting plate; and a filter layer of the filter screen is telescopic. When the filter layer is compressed by the upper supporting plate under pressure, the pore diameter of the filter layer is reduced and the density is increased, so that the filtration precision can be improved. Under the condition of reverse blowing from the air outlet pipe, the air pressure drives the upper supporting plate to restore to the original state; the filter screen is stretched; the filter layer of the filter screen is loosened; and the density of the filter layer is reduced, so that air can easily remove dust on the outer surface of the filter screen, thereby the filter is convenient to use.

Method for examining bone in vivo, comprises obtaining a laser beam; modulating the laser beam to insert therein photoacoustic frequencies including optical frequencies and acoustic frequencies, the acoustic frequencies being able to give rise to acoustic waves; directing the modulated beam at a bone to cause acoustic waves resulting from the beam to travel through the bone; analyzing received signals from the bone including signals resulting from the acoustic waves, to determine a mineral density and a bone quality for said bone, and thus obtain in-vivo data that can be of assistance to a doctor when diagnosing osteoporosis.

The invention relates to the field of welding equipment, in particular to full-automatic welding machine. The full-automatic welding machine comprises a material feeding device, a welding accessory feeding device, a welding device, a discharging device and a circular turntable, wherein the material feeding device, the welding accessory feeding device, the welding device and the discharging device are all arranged beside the turntable; a plurality of placing rods sleeved by materials are arranged at the edge of the top of the turntable; the discharging device comprises a third rotating device, and a second material conveying device which is used for transferring welded materials on the placing rods to the rotating device; the third rotating device rotates the materials from a vertical state into a horizontal state; the third rotating device comprises second transitional rods for inserting the materials; a material returning device for taking down the horizontally arranged materials on the second transitional rods is arranged beside the third rotating device; a tubular material welding mode is a double-stroke welding mode, so that the welding efficiency is improved, and the welding density is precisely controlled; and an accurate material feeding and discharging mode of tubular materials reduces the material feeding and discharging error rate.

The invention relates to a high-temperature resistant heat insulating material using vermiculite as a main raw material and a method for manufacturing the same, which belong to the field of heat insulating materials. The method is characterized by comprising the following steps: firstly, quickly heating and swelling commercially available primary minerals of the vermiculite with large, medium and small diameters at a temperature of between 500 and 900 DEG C; secondly, mixing the swelled vermiculite with an aluminum dihydrogen phosphate bonding agent, aluminum hydroxide or rho-alumina, and nano-silica according to the requirement of weight percentage; stirring the mixture evenly in an airtight stirring machine and then filling the mixture into a die; after prepressing, performing hot pressing and shaping on the mixture; and after discharging, finishing the product properly to obtain the high-temperature resistant heat insulating material using the vermiculite as the main raw material. Through grain composition, density control, addition of the nano-silica and application of the high-temperature resistant bonding agent, and using small grained primary minerals of the vermiculite with large yield and low cost, the high-temperature resistant heat insulating material and the method solve the bottleneck problems of insufficient supply of large grained primary minerals of the vermiculite, and the improvements on the strength and the service temperature of the vermiculite heat insulating material at the same time, thus the material can keep a low coefficient of thermal conductivity under a high temperature condition.

The invention discloses a preparation method of a MnZn (Manganese-Zinc) soft magnetic ferrite material containing modified nanoscale titanium dioxide. The preparation method comprises the following steps of: preparing main materials, preparing auxiliary materials, pre-burning, mixing and secondarily ball-milling the main materials and the auxiliary materials, shaping and sintering to obtain a MnZn soft magnetic ferrite magnetic core of modified nanoscale titanium dioxide. Through the addition of the modified nanoscale titanium dioxide, the MnZn soft magnetic ferrite material can play a bridge combination role among different raw materials; the used raw materials have the advantages of better distribution, high density, high grain boundary resistivity, low porosity and great and even grains; the prescription of the raw materials is reasonably improved, so that the magnetic core has higher magnetic conductivity after firing; and the indexes such as power loss, frequency feature, curie temperature, saturation flux density and the like are greatly improved.

The invention provides a manufacturing method of a high-hardness plastic screen and a high-hardness plastic housing of a mobile phone, and a mobile phone screen and a mobile phone housing manufactured by the manufacturing method. The manufacturing method comprises the following steps: performing secondary compressing and forming to obtain a base plastic material; cleaning and drying the base plastic material through electrostatic eliminated drying gas for the first time; soaking in an adhesive for the first time; cleaning and drying the base plastic material covered with the adhesive through the electrostatic eliminated drying gas for the second time; soaking in enhanced liquid containing silicide, nanometer aluminum oxide and corundum for the second time; roasting; hardening; trimming. The product manufactured by the method is free of rainbow-like marks, high in light transmission rate, and high in density; the hardness of the product is up to 9H, and is equal to or beyond that of a traditional glass screen; in addition, the product is hard to break, so that the product can completely replace glass to be used as the screen of the mobile phone; compared with a glass material, the plastic is low in price, so that the cost of the mobile phone screen manufactured through the plastic is low, and as a result, the use cost of a user can be decreased.

The invention relates to an electrochemical method for detecting banned additive urotropin in food, which comprises the following steps of: respectively and simultaneously inserting a working electrode carbon paste electrode, a reference electrode saturated calomel electrode and a counter electrode platinum sheet into 0.1mol.L-1PBS (Phosphate Buffer Solution) buffer solution to carry out differential pulse voltammetry scanning to obtain the oxidation peak current value of the urotropin, wherein the pH of the buffer solution is 6, the buffer solution contains a series of urotropin standard solution in different concentrations, and the oxidation peak current value and the concentration of the urotropin have a good linear relationship; with the same method, the oxidation peak current value of the sample solution is obtained; and according to a standard curve and a corresponding linear regression equation, the density of the urotropin in the sample is obtained. The method is simple in operation, is convenient and quick and has a low detection cost, and the urotropin can be directly detected.

The invention discloses a multi-plate magnetorheological soft start device, which is characterized in that: a right shaft is in threaded connection with a right sealing disk; the outer ring of the right sealing disk is provided with a key groove which is matched with internal teeth of internal friction plates; a left shaft is in threaded connection with a left sealing disk; the left sealing disk is connected with a sealing ring through a screw; the inner ring of the sealing ring is provided with a key groove which is matched with external teeth of external friction plates; the internal friction plate and the external friction plates are alternately arranged; a magnet exciting coil is arranged between a left end plate and a right end plate; and the upper part of the right end plate is provided with a fluid injecting bolt, and the lower part of the right end plate is provided with a fluid discharging bolt. Magnetorheological fluid is taken as a working medium, the in-plate magnetic induction density is regulated by controlling the current of the magnet exciting coil, and the transmission torque is changed, so that the controlled soft start of heavy mechanical equipment is realized. The multi-plate magnetorheological soft start device has a hollow symmetrical structure, has high heat dissipation and high reliability and is convenient to operate.

A method for packing and/or mixing particulate materials, e.g., aerogel particles, includes combining materials having different particle sizes and applying a negative pressure differential in the presence of a sound field. A negative pressure differential in the presence of vibration also can be used. The method increases mixing and packing density.

The invention provides a preparation method for preparing a nylon porous material on a large scale. The preparation method is characterized in that the selected raw material is nylon, the preparation process is simple and efficient, water in the production process can be repeatedly utilized, and the preparation method conforms to the environment-friendly concept. The nylon is dissolved by using anhydrous formic acid, and a sodium bicarbonate solution is added for foaming to obtain the porous material which is of a three-dimensional porous structure and has excellent performance. The prepared nylon porous material has the advantages of being low in density, high in porosity, low in heat conductivity, high in specific surface area and the like. Compared with aerogel and other porous materials, the preparation method for preparing the porous material is simple, and low-cost large-scale production can be achieved. The method can be used in heat preservation, heat insulation, marine petroleum pollution treatment, catalyst carriers, sound absorption and shock absorption buffer materials and other fields, and has wide application prospects.

The invention relates to the technical field of marine polyurethane thermal insulation balance weight pipes, and discloses a hard polyurethane spraying prefabricated thermal insulation balance weight pipe with an anti-corrosion layer and a preparation method of the hard polyurethane spraying prefabricated thermal insulation balance weight pipe. The hard polyurethane spraying prefabricated thermal insulation balance weight pipe structurally comprises a steel pipe, the anti-corrosion layer, a polyurethane foam thermal insulation layer, an interface adhesive layer, a polyolefin protection layer, anti-skid particles, a concrete balance weight layer and a reinforcement steel wire mesh in sequence from inside to outside. A waterproof sealing rubber strip is bonded to the end of the anti-corrosion layer. The preparation method comprises the steps that the steel pipe coated with the anti-corrosion layer is conveyed to a polyurethane foam spraying line for spraying construction; the waterproof sealing rubber strip is bonded; an adhesive is wound, polyolefin is extruded, and the anti-skid particles are scattered; the pipe end of the polyolefin protection layer is finished after cooling; and weight balancing, finishing and maintaining of the thermal insulation pipe are carried out. The conditions of holes and uneven density cannot be generated, a pipe end waterproof cap does not need to be additionally mounted, and consistency of the pipe end and a main coating can be kept; and the shearing strength between the polyurethane foam thermal insulation layer and the polyolefin protection layer and the shearing strength between the polyolefin protection layer and the concrete balance weight layer are increased.

The invention discloses an aluminum alloy guide wheel manufacturing method and a product thereof. The method comprises the steps of: 1) preparation of an aluminum material; 2) preparation of a die casting mold; 3) die casting; 4) rough machining; 5) finish machining; and 6) surface treatment: the surface of a guide wheel blank is treated to obtain an aluminum alloy guide wheel product. The method is simple in process; the guide wheel blank with a needed shape is molded through quick die casting; the turning allowance is only 0.3-0.5 mm in CNC finish machining; the machining time is short; the efficiency is high; the labor cost is reduced; the CNC lathe cost is directly reduced; the whole manufacturing procedures are simple and liable to realize; the production period is greatly shortened; the production efficiency is high; the cost is low; and the manufactured aluminum alloy guide wheel product is high in structural density, has no defects of air holes and looseness, obviously improves the wear resistance and the bearing strength, is excellent in comprehensive performances, delicate in appearance and beautiful and elegant in shaping, and facilitates wide popularization and application.

The invention discloses a heat-preservation sound-insulation magnesium oxysulfate fireproof material applied to a wallboard and a preparation method thereof, and mainly relates to the field of building wall materials. According to the technical scheme, the heat-preservation sound-insulation magnesium oxysulfate fireproof material is prepared from, by weight, 200 parts of magnesium oxide, 150-300 parts of a magnesium sulfate solution, 1-3 parts of a magnesium oxysulfate modifier, 0.1-0.7 part of polypropylene fibers, 10-70 parts of a fireproof adsorbing material, 4-16 parts of polystyrene particles, 30-100 parts of a foamed inorganic material, 10-70 parts of an active filler and 10-70 parts of foaming agent foam. The heat-preservation sound-insulation magnesium oxysulfate fireproof materialapplied to the wallboard and the preparation method thereof have the advantages that the polystyrene material is added into a magnesium oxysulfate cement material to achieve a heat preservation function, the foamed inorganic material and the foaming agent foam are added, the density of the a wallboard can be reduced when the heat-preservation sound-insulation magnesium oxysulfate fireproof material is used for preparing the wallboard, so that the wallboard generates a porous structure to achieve heat preservation and sound insulation effects, and the heat-preservation sound-insulation magnesium oxysulfate fireproof material also has the advantages of good fireproof performance, high strength, impermeability and moisture prevention of the magnesium oxysulfate cement material.

The invention discloses a preparation method of PMI (Polymethacrylimide) foam plastic. The preparation method comprises the following steps: S1, blending and mixing an oil-soluble free radical initiator, a monomer, a foaming agent and an additive to obtain a spare sizing agent; S2, polymerizing the mixture in a constant-temperature water bath to obtain a foamable copolymer material; S3, smashing the foamable copolymer material to obtain foamable copolymer particles; S4, directly pouring the foamable copolymer particles into a forming mold according to a proportion for foaming, and filling molds of any shapes with the foamable copolymer particles according to different density demands for foaming to obtain PMI foam products of corresponding mold shapes. By adopting the preparation method, the conventional process is improved, the production demands of special-shaped products can be met, special-shaped molds can be directly used for foaming according to the profiles of the special-shapedproducts, the utilization rates of raw materials are improved, and meanwhile the production efficiency can be improved greatly.

The invention discloses a porous carbon material prepared by using self-modification of pseudomonas putida and a preparation method and application thereof. Self accumulation PHA of the pseudomonas putida (Pseudomonas putida KT2440, preservation serial number of ATCC No.47054) is regulated and controlled by changing ingredients of a culture medium, and carbonization is carried out by directly adopting thallus collected by centrifugation to prepare the graded porous carbon material without any excitation steps. The germ self-modification derived porous carbon material has a large number of mesopore structures. The porous carbon material is used as an electrode material of a super capacitor, when electric current density is 0.5 A/g, the specific volume of the porous carbon material reaches 298 F/g; and when the electric current density increases by 20 A/g, the specific volume of the porous carbon material maintains by 234 F/g, and good electric capacity and excellent rate performance aredisplayed. The preparation method has the advantages of novelty, simple operation, low manufacturing cost and the like, the prepared material has the characteristics of graded bore diameter, large specific surface area, good electrical conductivity and excellent electrochemical performance, and is an electrode material for the ideal super capacitor or batteries.

The invention is a laser engraving machine for steel cylinders. The laser and the X-direction displacement platform are installed on the same horizontal plane, the connecting seat is installed on the X-direction displacement platform, and a 30°1064nm total reflection mirror and Z-direction displacement platform are installed on the connection seat. , the engraving head is installed on the Z-direction displacement platform, the engraving head as a whole can make compound movements along the Z-direction and X-direction, the X-direction and Z-direction are located on the same vertical plane, and the angle between the X-direction and Z-direction is 60° , the engraving head is composed of the first pair of 45°1064nm total reflection mirror group, the second pair of 45°1064nm total reflection mirror group and the focusing head capable of plane numerical control interpolation movement. The invention utilizes high energy density laser beam to directly irradiate the cylinder On the surface, oxidative combustion reaction of pure oxygen gas and carbon steel cylinder is assisted, and rapid deep engraving is carried out, which realizes the one-time rapid marking of the required characters on the surface of the cylinder, and meets the needs of industrial production of automated assembly lines.

The invention discloses a high-density polyvinyl chloride drainage board and a preparation method thereof, and particularly relates to the technical field of waterproof materials. Thehigh-density polyvinyl chloride drainage board comprises a drainage board body, wherein a stud is arranged on one side of the drainage board body, an inserting groove is formed in one end of the drainage board body, and an inserting bar is arranged at the other endof the drainage board body; guiding grooves are formed in the inner walls of the two sides of the inserting groove, and guide bars are arranged onthe two sides of theinserting barcorrespondingly;an embedding groove is formed in the outer side of the top end surface of theinserting groove; and a sealing plate is arranged at the top end of the inserting groove in a matched mode. According to the high-density polyvinyl chloride drainage board andthe preparation method thereof, by using the matched type inserting groove and the inserting bar as well as the guide grooves and the guide bars, the connection convenience between the adjacent drainage board bodies can be greatly improved, the sealing plate is fixed in the inserting groove by a locking bolt, so that the connection between the two adjacent drainage board bodies is more stable, meanwhile, by adding flat glass fibers and glass flakes to a formula, the compressive strength of the drainage board can be greatly improved, and the water absorption rate can be reduced.

The invention provides a method for manufacturing a light-weight fiberboard. The method for manufacturing the light-weight fiberboard comprises the steps of debarking wood, chipping and screening to obtain wood chip; grinding the wood chip to respectively obtain coarse fibers and fine fibers; sequentially overlapping and laying fine fibers, coarse fibers and fine fibers to obtain a semi-finished fiberboard; sequentially performing prepressing, hot-press forming, cooling and conditioning to the semi-finished fiberboard to obtain the light-weight fiberboard. By using the method provided by the invention, the problem that the mechanical property of the fiberboard is caused to be decreased because the amount of used raw materials per unit volume is reduced in the prior art is solved and the obtained light-weight fiberboard is a three-layer light-weight fiberboard, wherein an upper surface layer and a lower surface layer are formed by the fine fibers and a core layer is formed by the coarse fibers. Therefore, under the situation that the total unit volume of the fiberboard is unchanged, by properly reducing the density of the core layer, the physical and mechanical properties of the fiberboards can be guaranteed and thereby a light-weight board which has a wider application range is produced.

The invention discloses an energy-saving filling machine based on Internet of Things and capable of realizing uniform filling. The energy-saving filling machine comprises a storage barrel, wherein a liquid separation mounting table is fixedly connected with the bottom side of the storage barrel and connected with a filling valve through a clamping mechanism; the side, deviated from the storage barrel, of the liquid separation mounting table is fixedly connected with a main support rod; the end, away from the liquid separation mounting table, of the main support rod is fixedly connected with afilling platform; the side, deviated from the main support rod, of the filling platform is fixedly connected with a base; traveling mechanisms are symmetrically arranged on the bottom side of the base; mounting grooves are symmetrically formed in the base. A first rotating shaft is driven by a drive motor to rotate, so that a first gear drives second gears on two sides to enable second rotating shafts to rotate, third rotating shafts start to rotate under transmission of transmission devices, propellers are driven to rotate by rotation of the second rotating shafts and the third rotating shafts and stir raw materials on the bottom layer continuously, so that raw material density is more uniform, and quality of filled products is improved.

The invention discloses a heat-insulating structure at the top of an open-air atmospheric storage tank, which comprises a tank top cap (1) and has the structural characteristics that hook nails (2) and a heat-insulating layer (3) are arranged on the tank top cap (1), a wire mesh (4) is arranged outside the heat-insulating layer (3), and a plastering protection layer (5) is arranged on the surfaces of the heat-insulating layer (3) and the wire mesh (4). One hook nail (2) is arranged per square meter, and each hook nail (2) is made of a galvanized wire of which the diameter is phi4mm; each hook nail (2) is exposed for 5cm-6cm on the surface of the heat-insulating layer (3); the wire mesh (4) is a galvanized wire mesh, and the wire diameter is phi1.6mm; and the wire mesh (4) is in a hexagonal or slipknot rhombic structure. The invention enables the plastering protection layer to not only keep the original advantages but also well overcome the original defects to enhance the bearing strength of the plastering protection layer, thereby preventing the plastering protection layer from being torn and leaking water due to frequent stress and overlarge deformation, and achieving the effects of durable protection, safety and stability.