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792results about How to "Improve molding rate" patented technology

Method for improving performance of thermal compression or thermal deformation radiation orientation neodymium iron boron permanent magnet ring and axial uniformity thereof

The invention relates to a method for improving the performance of thermal compression or thermal deformation radiation orientation neodymium iron boron permanent magnet ring and the axial uniformity of the thermal compression or thermal deformation radiation orientation neodymium iron boron permanent magnet ring. The method for improving the performance of the thermal compression or thermal deformation radiation orientation neodymium iron boron permanent magnet ring comprises the following steps: (1) conducting thermal compression on rapid quenching magnetic powder which has a nanocrystalline structure or high density digital recording (HDDR) magnetic powder in a vacuum inductive thermal compressor to form an isotropous magnetic body by utilization of a thermal compression technology; (2) conducting thermal deformation on the isotropous magnetic body through cutting or replacement of a series of molds with different internal diameters to obtain an anisotropy magnetic body with different predeformation amounts; and (3) preparing the above predeformation anisotropyv magnetic body through a back extrusion technology to form a radiation orientation permanent magnet ring; by means of the predeformation technology, blank of the prepared radiation orientation magnet ring is enabled to have a certain degree of orientation and texture. In the process of preparation of the radiation orientation ring, the radiation orientation is benefited to be formed, thus under the condition that coercive force is not significantly reduced, the performance and the uniformity of the radiation orientation magnet ring are improved, the ratio of briquetting of the magnet ring can be greatly improved in the process of preparation of the magnet ring, energy consumption is reduced, and cost is saved.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI

Four-axis linkage 3D printing device based on fusion deposition principle

The invention discloses a four-axis linkage 3D printing device based on the fusion deposition principle, belongs to the field of 3D printing and manufacturing, and relates to the four-axis linkage 3D printing device based on the fusion deposition principle. The printing device is composed of a rack, a printing sprayer assembly, a control assembly, an X-axis drive assembly, a Y-axis drive assembly, a Z-axis drive assembly and an A-axis drive assembly. A shaft sleeve of the A-axis drive assembly can be detached and replaced, a series of shaft sleeves the same in inner diameter but different in outer diameter can be selected, and forming and manufacturing of pipe-shaped structure models different in inner diameter are conveniently achieved. By means of the printing device, a thin-wall pipe net-shaped structure can be conveniently prepared, any auxiliary supporting structure does not need to be additionally arranged in the printing process, the posttreatment and other complex operation processes are simplified, printing materials are saved, and the forming rate and surface quality of test piece printing are effectively improved. The A-axis drive assembly is flexible in control and easy and convenient to mount and dismount, a series of inner diameter test pieces can be formed by replacing the shaft sleeves of different outer diameters, and the four-axis linkage 3D printing device is simple, practical and easy to operate and popularize.
Owner:DALIAN UNIV OF TECH

Method for integrally casting large-sized V-shaped diesel engine body by utilizing nodular cast iron

The invention discloses a method for integrally casting a more-than-25-ton large-sized diesel engine V-shaped body by utilizing nodular cast iron. The method comprises the following steps of A1, smelting the nodular cast iron in a smelting furnace, and adding bariumsili and metallurgical carborundum pretreatment agent after the smelting; A2, placing a spheroidizing agent into a bottommost layer of a dam-type spheroidizing ladle, utilizing a nucleating agent to cover a second layer, and utilizing a low-maganese low-alloy broken steel sheet to completely cover and compact a third layer; A3, adding a calcium-barium nucleating agent, charging the melted iron in one step to carry out the tapping metal-stream inoculation, realizing the nucleating effect while carrying out the spheroidizing treatment on charged melted iron, and carrying out the pouring pretreatment on the melted iron in the ladle; A4, placing the metal-stream inoculation agent into a funnel to carry out the pouring metal-stream inoculation; and A5, finally pouring the melted iron with the temperature being more than or equal to 1400 DEG C into a sand box, forming a cast by mold filling and solidifying the melted iron under the feeding of the feeder head liquid metal, and carrying out the heat treatment by utilizing the waste heat of the cast.
Owner:宜宾普什联动科技有限公司

Preparation method of effervescent tablets

The invention discloses a preparation method of effervescent tablets. Polyethylene glycol is heated and melted and then is diluted with ethanol, a polyethylene glycol-ethanol solution is formed and then coats an acid source and an alkaline source, and accordingly, acid-source granules coated with polyethylene glycol film layers and alkaline-source granules coated with polyethylene glycol film layers are formed; the acid-source granules and the alkaline-source granules are sufficiently mixed and stirred, a mixture is formed, an ethanol solution of polyvinylpyrrolidone K30 is added to the mixture for secondary coating, a product is crushed after being dried, and effervescent granules coated with double organic film layers are obtained after uniform mixing; main medicine ingredients of a medicine and other acceptable excipients used for preparation of the effervescent tablets are added to the effervescent granules, and the effervescent tablet preparations are obtained through tableting after sufficient mixing. The prepared effervescent tablets are not prone to moisture absorption and deterioration and have good flowability; the forming rate is high, and sticking is avoided; the disintegration is fast. According to the method, adopted raw materials are cheap and easy to obtain, the method is simple, pollution-free and harmless to a human body, has low requirements for equipment and has good application prospect, and industrial production is easily realized.
Owner:CENT SOUTH UNIV

Method for preparing tricalcium phosphate/barium strontium titanate composite biological ceramic with minimum curved surface structures on basis of 3D (three-dimensional) printing technologies

The invention discloses a method for preparing tricalcium phosphate/barium strontium titanate composite ceramic with minimum curved surface structures by means of 3D (three-dimensional) printing, andbelongs to the field of 3D printing technologies and biological ceramic. Compositions for the tricalcium phosphate/barium strontium titanate composite ceramic mainly include 35-70 vol% of tricalcium phosphate/barium strontium titanate composite ceramic powder and 30-65 vol% of photosensitive resin premixed liquid. The method has the advantages that DLP (digital light processing) (digital light curing) 3D printing technologies are high in forming speed and printing model precision and low in cost; Rhino software designs are used, minimum curved surface models are optimized, models are importedinto Q3DP software, scanning data are sliced and exported, slurry is prepared according to certain proportions, ball-milling is carried out, the slurry is led into resin grooves of BESK printers, printing is started, printed bodies are further placed into medium-sized furnaces to be degreased and sintered, accordingly, the tricalcium phosphate/barium strontium titanate composite ceramic with the stable structure, excellent mechanical properties, piezoelectric properties and biocompatibility can be ultimately obtained, and the like.
Owner:BEIJING UNIV OF TECH

Pre-pressing forming and intensified sintering method of fine iron ore concentrate

The invention relates to a pre-pressing forming and intensified sintering method of fine iron ore concentrate. The pre-pressing forming and intensified sintering method comprises the following steps of: firstly, mixing fine iron ore concentrate with calcined lime uniformly, and forming into cylindrical material particles through pre-pressing by a high pressure roller forming machine; then, mixing the cylindrical material particles with other sintering raw materials to form a mixture, and arranging, igniting and sintering sintering material particles after the sintering material particles are prepared inside a cylindrical nodulizer so as to obtain agglomerate. The key of the method is as follows: the iron ore concentrate is processed through pre-pressing forming, material difficult to pelletize is forced to be formed through strong external force effect, the size composition of the mixture is improved, and the mixture is palletized together with other mixtures so as to improve the air permeability of sintering material layer; the sintering performance and metallurgical performance of the fine iron ore concentrate are improved so as to intensify the sintering; and under the condition of keeping the quality of sintering ore, the sintering ore yield and iron grade are improved, the energy consumption is reduced, and charging material with good quality is provided for intensifying blast furnace process.
Owner:CENT SOUTH UNIV

Biomass fuel particle and processing device and method thereof

The invention relates to a biomass fuel particle and a processing device and method thereof. The biomass fuel particle is prepared from the components: 15 parts of rice husks, 25 parts of straw, 10 parts of wood scraps, 3 parts of corn cobs, 35 parts of rice and wheatgrass, 5 parts of tree roots, 35 parts of wood chips, 10 parts of bagasse, 5 parts of cottonseed shells, 3 parts of a dehydrator, 1part of pecan shells and 1 part of bamboo chips. The processing method includes the following steps that step 1, biomass fuel is put into a fuel processing cylinder; step 2, a reciprocating drive assembly starts to drive a stirring plate and a spiral stirring blade move up and down in a reciprocating mode, and the biomass fuel is rotated and stirred up and down in a reciprocating mode; step 3, a particle processing driving part starts to drive two pressing rollers to rotate, and the two pressing rollers extrude the biomass fuel from a circular through hole by the cooperation with a round holeseat plate; step 4, the particle processing driving part drives a cutting knife mechanism to rotate, and the rotary cutting knife mechanism cuts the extruded column-shaped biomass fuel into grain shape; and step 5, biomass fuel particles fall into a material receiving box to be collected.
Owner:吉林省尚心能源有限责任公司

Traditional Chinese medicine prescription granule preparation by melted extrusion method

The invention relates to a melted extrusion method for preparing traditional Chinese medicine prescription granules, comprising the following steps: using an auxiliary material with a low melting point as a binding agent and evenly mixing with traditional Chinese medicine extract powder according to a certain ratio; placing the mixture in an extrusion pelletiser to prepare into granules in the extrusion process; straightening granules after cooling to obtain the traditional Chinese medicine prescription granules, wherein 40-70 DEG C is preferably used as the melting point or melting range of the low melting point auxiliary material; and the dosage ratio of the auxiliary material accounts for 10-40% of the total weight of the auxiliary material to the traditional Chinese medicine extract powder. The invention has higher molding efficiency, avoids the phenomena such as change of medicine tincture and active ingredients caused by repeated extrusion, weakened dissolubility and the like, thus especially being suitable for traditional Chinese medicine extract powder with poor viscosity and varieties such as fruit and seeds containing high fatty oil and starch, roots and tubers, parts offlowers and plants, leather and the like. The granules prepared by the invention have fine mobility, compressibility and dissolubility, and the granules prepared by using hydrophobic auxiliary materials have lower hygroscopicity.
Owner:JIANGYIN TIANJIANG PHARMA

Coal sample preparation device for true three-dimensional permeability determination

The invention relates to a coal sample preparation device for the true three-dimensional permeability determination. The preparation device comprises a fixed support, the fixed support is provided with a sample loading bench, and the sample loading bench is formed by a loading plane and a sample holder arranged on the loading plane; and a sliding guide rail is arranged over the sample loading bench, the sliding guide rail is slidingly provided with a sliding block, the sliding block is provided with a vertically downward jet nozzle, the jet nozzle is a flat seam nozzle, the flat seam of the flat seam nozzle and the sliding guide rail are arranged in a longitudinal parallel mode. The coal sample preparation device for the true three-dimensional permeability determination adopts the flat seam nozzle, so a jet flow jetted by the flat seam nozzle forms a plane type jet flow, and a stress concentration problem caused by the strong heterogeneity of the internal structure of coal can be maximally reduced, so the coal sample fragmentation risk is reduced, and the coal sample molding rate is improved; coal sample cutting is carried out in a plane type jet mode, so the cutting speed of a water jet flow is improved, thereby cutting surfaces are flattened, and the cutting effect is good.
Owner:CHINA UNITED COALBED METHANE +1
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