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338results about How to "Uniform density" patented technology

Automatic control multi-spray-head electrostatic spinning equipment

The invention provides automatic control multi-spray-head electrostatic spinning equipment, which comprises a high-voltage electrostatic generator, a receiving device and a lifting device and is characterized by also comprising an automatic control box, a dustproof transverse moving slide table, a multi-passage precise liquid supply pump and a self-cleaning type multi-spray-head device, wherein data interfaces of multi-passage precise liquid supply pump, the dustproof transverse moving slide table and the receiving device are respectively connected with the automatic control box, an injector is fixedly arranged at the multi-passage precise liquid supply pump, the self-cleaning type multi-spray-head device is connected with the front end of the injector, a bakelite plate covered with a conducting wire is fixedly arranged on a spinning head, a conducting clamp post is fixedly arranged on the bakelite plate covered with the conducting wire, and the high-voltage electrostatic generator is connected with the conducting clamp post. The automatic control multi-spray-head electrostatic spinning equipment has the advantages that the precision, integration and automation degree is high, the operation is simple, convenient, safe and fast, the production efficiency is high, and wide application prospects are realized in the industrial aspect of nanometer fibers.
Owner:DONGHUA UNIV

Steel blank grinding abrasion wheel adopting microcrystal ceramic bonding agents

The invention relates to a steel blank grinding abrasion wheel adopting microcrystal ceramic bonding agents, which is in a structure made of polycrystalline solid materials with the coexistence of glass and crystals and adopts the bonding agents of clay, feldspar, boron-containing microcrystal glass, pyrophyllite and soapstone to be made into high-intensity and low-shrinkage engineering ceramic bonding agents, good performance of the glass and the ceramics such as high mechnical intensity, wear resistance, corrosion resistance and the like are integrated, then, the glass and the ceramics are combined with mixed grinding materials, a molding pressing method is adopted for the high-pressure double-side pressing process forming, the low-temperature firing is adopted, the positive pressure reducing atmosphere heat simulation crystallization is adopted at the 800 DEG C heat insulation section, and the mixed grinding material and micro porous glass phase high-intensity microcrystal engineering ceramic composite structure is formed, so the intensity and the bonding degree of the steel blank grinding abrasion wheel are greatly improved, the use linear speed of the abrasion wheel is accelerated, and the safety factor is high. The steel blank grinding abrasion wheel belongs to the novel efficient special steel blank grinding abrasion wheel with the characteristics that the intensity andthe hardness are high, the tissue density is uniform, the grinding ratio is great under the condition of high-speed grinding, workpieces can not be damaged through firing, and the automation of iron and steel industries is easy to realize.
Owner:江苏华东砂轮有限公司

Microwave treatment reconstructed material and preparing methods thereof

The invention discloses a microwave treatment reconstructed material and preparing methods thereof. A raw material of the microwave treatment reconstructed material comprises sawn timber. The microwave treatment reconstructed material is obtained through the sawn timber via the preparing method 1 or the preparing method 2. According to the preparing method 1, the sawn timber is subjected to high-strength microwave treatment firstly, and then direct hot press is conducted. According to the preparing method 2, the sawn timber is subjected to high-strength microwave treatment firstly, then the sawn timber is immersed in a resin-based bonding agent or a biology-based bonding agent, and then the microwave treatment reconstructed material is formed through hot press or cold press. According to the microwave treatment reconstructed material and the preparing methods thereof, the problems that the density of the timber is not even, the mechanical performance is not high, the size stability of the immersed reconstructed material is poor, the immersing depth is not enough, and uniformity is poor are solved. The microwave treatment reconstructed material prepared through the methods can be used in the furniture field, the indoor decoration field and the wood structure building field.
Owner:RES INST OF FORESTRY NEW TECH CHINESE ACAD OF FORESTRY

White light LED (light emitting diode) and packaging process thereof

InactiveCN102544322AImprove light color consistencyUniform densitySemiconductor devicesFluorescenceRoom temperature
The invention relates to a packaging process of a white light LED (light emitting diode). The packaging process comprises a die bonding step, a wire bonding step, an adhesive preparing step, a dispensing step, a fluorescent powder precipitating step and an adhesive solidifying step, wherein in the fluorescent powder precipitating step, one of a centrifugal precipitation method, a baking precipitation method or a room temperature natural precipitation method is adopted or more of the centrifugal precipitation method, the baking precipitation method and the room temperature natural precipitation method are combined to ensure fluorescent adhesives to be divided into an upper packaging adhesive layer and a lower fluorescent powder layer covering an LED chip in a reflecting cup to ensure at least most fluorescent powder in the fluorescent adhesives to be precipitated on the fluorescent powder layer; and in the adhesive solidifying step, the reflecting cup after precipitation is continuously put in an oven to be baked to solidify the packaging adhesives in the reflecting cup and the packaging adhesives are taken out of the reflecting cup after being solidified. By adopting the packaging process, the problem that the light colors of the white light LEDs generated by the existing packaging processes of the white light LEDs have poorer consistency is mainly solved and the aim of ensuring the consistency of the light colors of the generated white light LEDs to be better is achieved.
Owner:江西兆驰光元科技股份有限公司

Laminated board formed by fine disintegration and rearrangement of whole raw bamboos and production technical method thereof

The invention discloses a laminated board formed by the fine disintegration and rearrangement of whole raw bamboos and a production technical method thereof. Moso bamboos are used as raw materials. The method comprises the following steps that first, raw arc-shaped bamboo sheets are finely cut, disintegrated, rolled and unfolded by a machine to form longitudinal bamboo filaments, the bamboo filaments are laterally connected into planar trapezoid bamboo blocks of basically identical thickness, and the widths of the planar trapezoid bamboo blocks gradually change from one ends to the other ends; then, the wide ends and the narrow ends of two adjacent bamboo blocks are alternately put according to the width direction of the same end of one planar trapezoid bamboo block, the bamboo green sides or the bamboo yellow sides are arranged on the same upper side or the same lower side, and the bamboo blocks are glued to form a whole board, thereby forming a fine disintegrated bamboo filament block single-layer board; and at least two layers of fine disintegrated bamboo block single-layer boards are layered and laminated in a way that the bamboo green sides of two adjacent layers of single-layer boards are close or the bamboo yellow sides and the bamboo green sides in two adjacent layers are close, and the laminated board formed by the fine disintegration and rearrangement of the whole raw bamboos is obtained after different layers of single-layer boards are glued by an adhesive and hot-pressed into a whole. According to the invention, the bamboo bodies are stored to an utmost extent, a cut quantity is reduced, and the mechanical properties of the raw bamboo materials are exerted.
Owner:HUNAN ACAD OF FORESTRY +1

Super capacitor electrode material and super capacitor electrode production method

The invention discloses a super capacitor electrode material and a super capacitor electrode production method. The electrode material contains an active substance, a conductive agent, a binder and a cationic surfactant, wherein, the cationic surfactant is quaternary ammonium salt with a long chain structure, the binder contains fluororesin, polyolefin compound, styrene butadiene rubber or carboxymethyl cellulose, and the conductive agent is ketjen carbon black, acetylene black, furnace black, carbon fiber VGCF, nano-graphite, carbon nanotube, graphite or conductive graphite. The super capacitor electrode production method comprises the following steps: (1) adding the conductive agent and the cationic surfactant into the active substance to carry out grinding and mixing; (2) adding the binder and solution to carry out slurry mixing to obtain slurry; (3) pasting the slurry on a current collection body, and carrying out calendaring, drying and molding. The electrode material and the production method in the invention have the characteristics of a simple process, uniform density of the active substance, good flexibility and wetting quality of an electrode sheet, strong conductivity, low internal resistance and high production efficiency.
Owner:BOHAI UNIV

Ceramic fiber filtering tube, preparation method and pressurization and suction forming device

The invention discloses a ceramic fiber filtering tube, a preparation method and a pressurization and suction forming device. The pressurization and suction forming device comprises a forming mold, apressurization pump, a dosage bunker, a vacuum pump and a vacuum filtrate tank, wherein the forming mold comprises an inner template, an upper template, a lower template, filter cloth and a blank tubecavity; the filter cloth and the blank tube cavity are arranged between the inner template and the upper template respectively; the filter cloth is arranged on the inner template; the lower templateis connected with the upper template; the upper and lower flange faces of the inner template are provided with sealing gaskets respectively; the top of the upper template is provided with a quick coupler for charging water or slurry; the quick coupler is connected with the pressurization pump; the pressurization pump is connected with the dosage bunker; the middle part of the lower template is provided with a water outlet for discharging water or slurry; the water outlet is connected with the vacuum filtrate tank; the vacuum filtrate tank is connected with the vacuum pump; a vacuum pressure gauge and a blow-off valve are arranged between the vacuum filtrate tank and the vacuum pump. The pressurization and suction forming device adopts a pressurization forming and suction sizing demolding form, is simple in structure, is convenient for forming, and is convenient to operate.
Owner:HEFEI HEYI ENVIRONMENTAL PROTECTION TECH ENG

Method for producing microwave isolator/circulator cavity

InactiveCN101433961ALiquidityImprove density uniformityEnergy efficient ICTSolventMarket based
The invention discloses a method for manufacturing a microwave isolator/circulator cavity. The method comprises: a. a step of preparation of adhesive resin; b. a step of reparation of feed, in which alloy steel powder and adhesive resin are mixed and granulized to obtain feed grains; c. a step of injection forming, in which an injected embryo similar to the cavity is formed through injection forming; d. a step of degrease and dissolving the adhesive resin with a solvent; and e. a step of sintering, in which the injected embryo is subjected to heat treatment of sintering finally and the required cavity is obtained. The method has the advantages: 1. products have stable quality and good consistence as mold forming ensures the sizes of products produced in batch are consistent; 2. the production efficiency is high, the batch delivery cycle is short, and requirement of mobile communication market base station for rapid development is met, as 8,000 pieces of products can be produced through injection with four-cavity molds; 3. energy conservation and high efficiency are achieved due to an approximately 100 percent utilization rate of raw materials; and 4. the production cost and the processing procedures are reduced, and more than 30 percent of manufacturing cost are reduced in batch production compared with the prior processing method.
Owner:SHANGHAI FUTURE HIGH-TECH CO LTD

Oscillating hot press sintering furnace

The invention provides an oscillating hot press sintering furnace and relates to the field of high-performance ceramic and powder metallurgy material preparation, in particular to equipment adopting the hot press sintering method. The oscillating hot press sintering furnace comprises a furnace body and a hydraulic mechanism. An upper water cooling pressure head, an upper graphite pressure head, a lower water cooling pressure head and a lower graphite pressure head are arranged inside the furnace body. The hydraulic mechanism comprises an upper oil press and a lower oil press. The upper oil press is connected with the upper water cooling pressure head. The lower oil press is connected with the lower water cooling pressure head. The top of the upper water cooling pressure head and the bottom of the lower water cooling pressure head are provided with electromagnetic resonance pressure applying devices correspondingly. The electromagnetic resonance pressure applying devices can adjust the vibration frequency, vibration amplitude and pressure while hot press sintering is conducted. According to the oscillating hot press sintering furnace provided by the invention, high-frequency vibration amplitude/pressure can be achieved through the bidirectional pressurizing mode, the sintering time is shortened, energy consumption is reduced, and the compactness of a product is more uniform; and in addition, system faults can be found in time, and safe production is guaranteed.
Owner:ZHUZHOU XINRONGLI IND

Method for preparing annular UO2 fuel pellet

The invention discloses a method for preparing a nuclear fuel, which comprises the following steps: mixing acrylic amide, subunit bisacrylamide, ammonium polyacrylate and deionized water to form premix solution; adding U3O8 powder into a ball mill, then adding the premix solution into the ball mill, and preparing U3O8 slurry of which the solid-phase content is more than or equal to 60vol percent and the viscosity is less than or equal to 1Pa.s through ball-milling dispersion; adding ammonium sulfate and tetramethyl ethylene diamine into the slurry, evenly mixing the slurry and then injecting the slurry into a die, solidifying the slurry, and removing the die to obtain an annular U3O8 raw blank; drying the raw blank at the temperature of between 60 and 80 DEG C and the humidity of between 80 and 95 percent, and un-sticking the raw blank at the temperature of 600 +/- 20 DEG C; and sintering the un-stuck annular U3O8 raw blank in the hydrogen atmosphere at the temperature of 1,730 +/- 10 DEG C to obtain an annular UO2 fuel pellet. The method has the advantages that the relative density of the primary pellet blank reaches 60%-70%, the breaking strength is over 20MPa, and the size-grinding machining allowance of a sintered body is minimized through mechanical machining and precise size control.
Owner:NUCLEAR POWER INSTITUTE OF CHINA
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