117results about How to "Suitable for mass production requirements" patented technology

A process for preparing the permanent-magnet AlNiCo alloy with equiaxed crystals includes such steps as proportionally mixing Al, Ni, Co, Cu, Ti, NbFe (1: 1), Fe, Si, FeS and SmCo, charging the mixture in furnace, preparing casting mould, vacuumizing, electric heating, filling Ar gas, casting, annealing, two-stage preheating, solution treating, magnetic field controlled cooling and three-stage tempering.

The invention provides a preparation method for efficiently extracting separating high-purity flavone components from ginkgo leaf. The main components are kaempferol-3-O-2'', 6''-dirhamnosylglucoside, rutin, quercetin glucosyl rhamnoside, kaempferol-3-O-rutinoside, isorhamnetin-3-O-rutinoside, quercetin p-coumaroyl glucose rhamnoside and kaempferol p-oumaroyl glucose rhamnoside. The preparation method comprises the following steps: pulverizing the medicinal material ginkgo leaf, adding an alcohol water solution to carry out extraction, concentrating, carrying out nonpolar macroporous adsorbent resin column chromatography on the filtrate, carrying out two-dimensional separation with a novel silica gel substrate bonded material, eluting with a methanol solution, collecting the eluate, concentrating, and drying to obtain the gingko flavone components. The invention enhances the target component content, and obtains the flavone components with definite content. The extraction and separation process has the advantages of high repetitiveness and favorable operability, and is suitable for large-scale preparation of flavone components by separation from ginkgo leaf. The flavone components can be used as a raw material for Shuxuening injections.

The invention discloses bismuth oxybromide particles with a three-dimensional flower-like microstructure and a preparation method and use thereof, which belong to the technical field of visible-light catalyst. The bismuth oxybromide powder has a three-dimensional flower-like microstructure of which the diameter is 1 to 5 micrometers, and the specific surface area of the bismuth oxybromide powder is 11.2 to 27.9m<2>/g. In the preparation method, mixed solution of glycol and isopropanol is used as a solvent, a bismuth salt and hexadecyl trimethyl ammonium bromide are used as a bismuth source and a bromide source respectively, the bismuth salt and hexadecyl trimethyl ammonium bromide are dissolved in the mixed solution of the glycol and isopropanol according to a Bi to Br ratio ranging from 1:1 to 1:4, the mixed solution is filled in a closed reaction kettle, the reaction kettle is placed in an oven at 120 to 160 DEG C for reaction for 6 to 24 hours, the obtained product is washed, centrifuged, dried and roasted in a muffle furnace at 250 to 450 DEG C for 4 to 6 hours, and finally the bismuth oxybromide is obtained. The obtained product has high photocatalyzing performance. The method is simple and convenient, the period is short, the raw materials are readily available, and the method meets the requirements for batch production.

The invention relates to a high Alpha-Si3N4 phase silicon nitride preparation method, which is carried out according to the following steps: silicon powder and silicon nitride powder are evenly mixed and pressed for charging; vacuum is pumped to (1.0-3.0)*10 <-2> Pa; hydrogen and nitrogen are filled in a stove, and the hydrogen and the nitrogen has the filling volume ratio that the ratio of the hydrogen and the nitrogen equals to (1-10): 100; burning pressure control is as follows: the pressure is controlled at 5-30Kpa before 1000 DEG C, the pressure is controlled at 10-30Kpa between 1000 DEG C and 1200 DEG C, and the pressure is controlled at 20-80Kpa between 1200 DEG C and 1350 DEG C. The phase content of the Alpha-Si3N4 is high; the energy consumption is low; the production cost is low; the Alpha-Si3N4 is suitable for mass production.

The invention discloses a rolling method of pipeline steel and a stainless steel composite plate. The rolling method comprises the step of a heating step, a rolling step, a cold control step, a straightening step and a stack cooling step. According to the rolling method, the rolling process is adjusted and researched, the low-temperature long heat preservation and heating process is adopted, a high-temperature low-speed high-pressure pressing process is adopted at the roughing rolling stage, the uniformity of the tissue of the steel plate before the cold control is guaranteed by controlling the thickness of an intermediate blank and controlling the finish rolling starting temperature, final rolling temperature, the pressing rate in the step before the final rolling and the like at the finish rolling stage, the particle size is relatively small, and the formation of the final steel plate needle-shaped ferritic structure is guaranteed by adopting a given cooling speed and controlling the start cooling temperature and the return red temperature by virtue of the cooling control process, so that the indexes of mechanical properties of the steel plate can be guaranteed.

The invention provides a method for preparing kaempferol-3-O-2'',6''-dirhamnosylglucoside, which comprises the following steps: by using a two-dimensional liquid phase chromatography-mass spectroscopy combination technology and taking methanol-water or acetonitrile-water as a mobile phase and a reversed phase C18 chromatographic column as a one-dimensional preparative chromatographic column, performing component cutting on a ginkgo leaf extract, and collecting a target component which is a kaempferol-3-O-2'',6''-dirhamnosylglucoside crude product; and by taking a reversed phase C18 chromatographic column as a two-dimensional preparative chromatographic column, under the guidance of selective ion peaks of mass spectroscopy, performing component cutting on the kaempferol-3-O-2'',6''-dirhamnosylglucoside crude product, collecting, and concentrating through rotary evaporation to obtain the high-purity kaempferol-3-O-2'',6''-dirhamnosylglucoside, wherein the purity can be up to 70% or above. According to the invention, the preparation process is high in repetitiveness and favorable in operability; and meanwhile, ginkgo leaves are abundant in resources and easy to acquire. Thus, the invention meets the requirements for large-scale production and can be used for the preparation of raw materials for a Shuxuening injection.

The invention discloses a TPE material magnetic gasket for a refrigerator and a freezer, comprising a TPE elasticity gasket gum cover provided a magnetic strip which passes through the gum cover. The TPE elasticity gasket gum cover mainly comprises the following raw materials according to the parts by weight: 40 to 45 parts of SEBS, 15 to 18 parts of PP, 3 to 5 parts of PE, 25 to 30 parts of vash oil, 5 to 8 parts of CaCO3, 1.3 to 1.5 parts of lubricant, and 0.2 to 0.8 part of antioxidant. The magnetic gasket is applicable to the refrigerator, the freezer and other refrigerating equipment, and has the advantages of environmental protection, insensitiveness to adverse temperature changes, excellent sealing performance and elasticity maintenance, energy consumption, long service life and the like. The invention also provides a method for preparing the TPE material magnetic gasket, which has the advantages of simple process, being applicable to mass production and the like.

A process for preparing Aximosi from 2,5-dimethyl pyrazine includes such steps as oxidizing by H2O2, esterifying by acetic acid anhydride, hydrolyzing in alkaline condition, and oxidizing by potassium permanganate and H2O2.

The invention provides a method for preparing kaempferol-3-O-rutinoside from a ginkgo leaf extract, which comprises the following steps: by using a two-dimensional liquid phase chromatography-mass spectroscopy combination technology and taking methanol-water or acetonitrile-water as a mobile phase and a reversed phase C18 chromatographic column as a one-dimensional preparative chromatographic column, performing component cutting on a ginkgo leaf extract, and collecting a target component which is a kaempferol-3-O-rutinoside crude product; and by taking a hydrophilic TECys as a two-dimensional preparative chromatographic column, performing component cutting on the kaempferol-3-O-rutinoside crude product, collecting, and concentrating through rotary evaporation to obtain the high-purity kaempferol-3-O-rutinoside, wherein the purity can be up to 80% or above. According to the invention, the preparation process is high in repetitiveness and favorable in operability; and meanwhile, ginkgo leaves are abundant in resources and easy to acquire. Thus, the invention meets the requirements for large-scale production and can be used for the preparation of raw materials for a Shuxuening injection.

The invention discloses a preparation method of a back-contact heterojunction solar cell. A pre-passivation layer of intrinsic amorphous silicon, an N-type amorphous silicon layer and an anti-reflection layer are sequentially deposited on the front side of the washed and dedamaged layer and the velveted monocrystalline silicon substrate; Depositing an intrinsic amorphous silicon back passivation layer on the back surface of the battery; The P-type amorphous silicon layer is deposited on the surface of the back passivation layer by a mask method, and then the insulation isolation layer betweenthe P-type amorphous silicon layer and the N-type amorphous silicon layer is directly deposited, and the insulation isolation layer is etched according to the preset width of the insulation isolationlayer by a photolithography method; Further depositing an N-type amorphous silicon layer on the back surface by a mask method; At last, that transparent conductive film is sequentially deposite by adopting a mask proces, and the metal film forms a contact layer, thereby completing the preparation of the solar cell of the invention. The invention improves the preparation process precision of the back surface structure pattern of the HBC single crystal silicon solar cell, reduces the width of the isolation layer, and improves the collection probability of the photogenerated carriers and the short-circuit current density of the HBC solar cell.

The invention relates to a method for preparing fluorine resin emulsion. The invention is characterized in that the method comprises the following steps: (1) blending agent A comprising components of fluorine resin, coupling agent, water-based silicone emulsion, FA-serial fluorine-containing surfactant and water is prefabricated; (2) blending agent B comprising components of silicone surfactant, silane coupling agent and water is prefabricated; (3) impregnant is made, and the blending agent A, the blending agent B, acidity pH value modifier, alkalescence viscosity modifier are mixed and stirred evenly until no condensation or precipitation exists in the impregnant, thus the impregnant is made. The invention also discloses a method for fabricating a coated fabric cloth. Compared with the prior art, the invention has the advantages that the obtained fluor resin coat base is used for fabricating a baking pad, a baking tray and a baking basket, has long-term heat-resistant property demonstrated by not deforming at the temperature of 260 DEG C, and does not deform, shrink or absorb oil; moreover, the fluor resin coat base has the advantages of anticorrosion, light weight, smooth surface, self-cleaning property and high temperature flame retardancy.

The invention discloses a floor turnover machine which comprises a frame body, wherein at least two belt wheels are mounted on the frame body in parallel; a belt is arranged on each belt wheel and is used for conveying floors; driving blocks are arranged on each belt at a certain distance; a floor turning device is arranged on the frame body and is positioned above the belts; the floor turning device at least comprises two floor turning grabbing hooks; the floor turning grabbing hooks control to turn over the floor by an air cylinder; the floor on the belt passes through a sensor before reaching the turning device; after the sensor receives signals transmitted by the floor, the signals are transmitted to a PLC (Programmable Logic Controller); the PLC filters the signals and feeds the spaced signals to the air cylinder, so that the air cylinder controls the floor turning grabbing hooks to turn the floor. According to the floor turnover machine disclosed by the invention, the automation of floor turning is realized, so that a large amount of human resources are saved; besides, the working efficiency is greatly improved.

The invention provides a machine tool for automatically milling two end faces and drilling central holes of a pin shaft. According to the machine tool, central hole drilling and one-outer-circle sleeving and turning are combined into one working procedure, automatic feeding and automatic discharging are carried out, and the production efficiency is greatly improved. The machine tool is mainly composed of a tool frame assembly, an automatic positioning device, an automatic clamping device, an automatic feeding device, an automatic double-face milling device, an automatic central hole drilling and sleeving-turning device and an automatic discharging device. The machine tool is reasonable and practical in design, two-end-face milling, central hole drilling and one-outer-circle sleeving and turning are combined into one working procedure, automatic feeding and automatic discharging are achieved, the speed is high, labor and time are saved, the concentricity of the central holes of the two ends is high, the grinding allowance is small, the production efficiency and the economic benefits of an enterprise are improved, the quality of a machined product is excellent, and the machine tool particularly meets the large-scale production requirement.

The invention provides a thermal airflow sensor and a manufacturing method thereof. The thermal airflow sensor structurally comprises a substrate, a first medium membrane and a resistor component, wherein a groove is formed in the upper surface of the substrate; the first medium membrane is positioned above the groove and comprises a plurality of first medium membrane units and grooves-shaped structures; the first medium membrane units are connected with the substrate; the groove-shaped structures penetrate through the first medium membrane and are positioned between adjacent first medium units; the first medium membrane and the substrate encircle a thermal-insulating cavity; the resistor component comprises at least one heating unit and at least two thermal sensitive units; each heating unit and each thermal sensitive unit are positioned on different firs medium membrane units; and the thermal sensitive units are positioned on two sides of the heating units. By adopting the technical scheme, the heat of the heating resistors of the thermal airflow sensor provided by the invention is thoroughly isolated from the substrate, so that heat consumption of the heating resistors is reduced, the detection sensitivity of gas flow is improved, and the detection response time is shortened; and the thermal airflow sensor is manufactured by using a single silicon wafer single-side silicon micro mechanical process, and is small in structural size, low in cost and simple in process.

The invention provides a method for preparing monoclinic phase Ga2S3 crystal, which comprises the following steps of: mixing Ga2O3, B and S according to the molar ratio of 1: 2: 3 and grinding; tabletting the mixture and putting the obtained tablets into a vacuum quartz tube; heating up to 950 DEG C at the speed of 30-40 DEG C/h; carrying out heat preservation for 72-144h; and cooling to 250 DEG C at the speed of 2-6 DEG/h; washing off the by-product B2O3 by hot water to finally obtain the monoclinic phase Ga2S3 crystal. The compound is good in heat stability, wide in transmittance wave band, simple in synthesis method, easy to operate, enough in raw material source, very high in synthesis yield of the compound, high in purity and good in repeatability, thus being suitable for the requirement of large-scale production.

The invention discloses a brittle metal microspheres preparation method based on a metal microspheres forming device. The metal microspheres forming device comprises an upper melting chamber and a lower cavity body. The melting chamber is mainly used for melting brittle metal. The molten brittle metal is sprayed into the cavity body by a spray nozzle and cools, solidifies and forms in the cavity body. Prepared brittle metal microspheres are distributed uniformly in particle size with the range being between 1mm and 4mm and the morphology of the prepared brittle metal microspheres is in a standard sphere shape. The method is simple in equipment, strong in operability and capable of continuous production and meeting the industrial production requirements.

Provided is a method for preparing monoclinic Ga2S3, comprising: mixing Ga2O3, B, and S according to a mole ratio of 1:2:3, grinding the mixture, pressing the ground mixture to form a sheet, then sealing the sheet into a vacuum quartz tube, and heating the tube in accordance with a specific temperature curve to obtain the product of monoclinic Ga2S3 crystal. Also provided is a use of monoclinic Ga2S3 crystal as infrared wave band second-order nonlinear crystal material.

The invention discloses a floor turnover device for wood floor processing. The floor turnover device comprises a plank feeding mechanism (2) and a plank discharging mechanism (7) symmetric with the plank feeding mechanism (2). A transmission shaft (11) is arranged between the plank feeding mechanism (2) and the plank discharging mechanism (7). The two ends of the transmission shaft (11) are provided with rotary discs (5). A plurality of supporting rods (4) are evenly distributed on each rotary disc (5) in the circumferential direction. A driven gear (6) is disposed at one end of the transmission shaft (11) and connected with a driving gear (8) through a chain (9). The driving gear (8) is arranged on a drive motor (10). By means of the floor turnover device for wood floor processing, floors can be automatically turned over, and a large number of human resources are saved; meanwhile work efficiency is substantially improved.

The invention discloses waterborne wood lacquer. The waterborne wood lacquer is prepared from a first mixed component, a second mixed component and water, and the mass ratio of the first mixed component to the second mixed component to the water is 100 to (12 to 18) to (10 to 20), wherein the first mixed component is prepared from 10 percent to 30 percent of waterborne polyurethane resin, 50 percent to 70 percent of waterborne acrylic resin, 1 percent to 5 percent of matte powder, 0.5 percent to 2 percent of wax paste, 3 percent to 6 percent of a film-forming auxiliary agent, 0.1 percent to 0.2 percent of a pH (Potential of Hydrogen) regulator, 0.5 percent to 1 percent of a rheological agent, 1 percent to 2.5 percent of a multifunctional auxiliary agent and 2 percent to 10 percent of water; the second mixed component is prepared from 15 percent to 30 percent of PMA (Polymethyl Acrylate) and 70 percent to 85 percent of a waterborne curing agent. By adopting the waterborne wood lacquer disclosed by the invention, the adhesive force between a waterborne finish paint layer and an oily primer layer can be remarkably improved, and the rigidity and the water resistance of a paint film are improved; the invention further discloses a preparation method of the waterborne wood lacquer, which has a simple preparation process, is easy to implement and is suitable for large-batch production requirements.

A permanent magnetic rotor for motor and making method thereof, which contains permanent magnetic ring, rotor core, rotor axle, axle hole for rotor axle penetrating rotor core, high temperature liquid rubber filled between permanent ring and rotor core, the rubber consolidated with permanent magnetic ring and rotor core after cooling. Said invention can effectively eliminate the resonance between motor and fan blade and noise.

The invention discloses a nifedipine slow release tablet. The nifedipine slow release tablet is formed through uniformly mixing and tabletting medicine-carrying particles and pharmaceutically acceptable auxiliary materials. The method for preparing the medicine-carrying particles comprises the following steps of: dissolving nifedipine and povidone in ethanol, evaporating an obtained mixed solution till the mixed solution becomes viscous, adding the viscous mixed solution into into docosanoic acid glyceride meltwater, fully stirring, cooling, smashing and sieving. The nifedipine slow release tablet provided by the invention improves the solubility of the nifedipine, well controls the release of the nifedipine, the process is simple, and the nifedipine slow release tablet is suitable for requirements of large-scale production.

The invention relates to a synthetic method of unsubstituted zinc phthalocyanine. The synthetic method is characterized by comprising the steps of using metallic zinc salt and phthalic nitrile as raw materials, using DMF as a solvent, and performing a reaction of the metallic zinc salt and the phthalic nitrile in the DMF at the temperature of 130-170 DEG C in a hydrothermal reaction kettle so as to obtain target products. The synthetic method disclosed by the invention is low in reacting temperature and short in reacting time, does not need any catalysts; and the method is simple, low in production cost, high in yield and purity and good in repeatability, so that the synthetic method can meet requirements for large-scale industrial production.

A boxing sandbag with an improved structure belongs to the technical field of body-building equipment and comprises a cylinder, a pedestal and a spring. The cylinder is connected with the pedestal via the spring. The cylinder is characterized by containing a medium cavity; an upper stand column fixing seat is formed on the bottom in a cylinder height direction; an upper stand column insertion cavity is formed in the upper stand column fixing seat; an opening of the upper stand column insertion cavity faces down; one end of an upper stand column is fixedly embedded into the upper stand column insertion cavity; the other end of the upper stand column downwardly extends and extends out of the lower base surface of the cylinder; the end part of the other end is provided with an upper spiral groove; a medium inlet/outlet is protruded from the center of the top in the cylinder height direction; the medium inlet/outlet is communicated with the medium cavity; the medium inlet/outlet is provided with a cylinder cover connected with the same; and a sealing seat is cushioned between the cylinder cover and the medium inlet/outlet. Transporting cost can be saved; damage to wrist joints can be avoided; safe use can be achieved; and the boxing sandbag with the improved structure has great overall strength, simple structure and requires low production cost and is suitable for large-scale batch production.