37results about How to "Solve the preparation process" patented technology

The invention discloses an O-shaped rubber seal ring service life prediction method based on multivariate sample differences. The O-shaped rubber seal ring service life prediction method comprises the specific steps that a multivariate nonlinear Wiener process degradation model of an O-shaped rubber seal ring is established; parameter variable function models are established, including data statistics and analysis and the function relation of parameters and stresses; a reliability service life calculation model is established; unknown parameters are calculated; the storage life of the O-shaped rubber seal ring is predicted under normal temperature and stress. The differences of sample individuals of O-shaped rubber seal rings are considered, mean values and standard deviations of drift coefficients, diffusion coefficients and Copulas parameters in the Wiener process are processed into variables, and the variables and an acceleration stress form a function relation, so that final prediction results are more in line with the actual engineering situation and are more accurate.

The invention relates to a mesalazine enteric sustained-release tablet preparation method, and belongs to the technical field of medicine. According to the present invention, a mesalazine enteric sustained-release tablet core is prepared by using wet granulation and tableting, and the mesalazine enteric sustained-release tablet is prepared through enteric coating, wherein each tablet contains 1.2g of mesalazine.

The invention relates to synthesis of a polymer-based magnetodielectric material and a process for manufacturing an electronic device, one of high-density polyethylene, polypropylene, polyfluortetraethylene, syndiotactic polystyrene and the like with low electromagnetic loss is specifically adopted, a surfactant, a compatibilizer, soft magnetic material powder with a certain particle size and magnetic loss, dielectric material powder with a certain particle size and dielectric loss, a left-hand effect material or photonic crystal material and other specific functional materials are added, high-temperature melting and mixing are performed in an internal mixer, cooling and crushing are further performed, granulation is performed for preparing modified plastics, and the electronic device is further manufactured according to the following flow path and process: injecting into the shape of a sheet or a rod, and further performing surface selective metallization, ultraviolet curing or hot-melt adhesive low-pressure injection packaging. The device manufactured by the material and the process is mainly used for miniaturized antennas. The device has a series of characteristics of wide frequency band, low impedance, deviation of a working frequency to low frequency band, special frequency selectivity and the like.

Disclosed is an electronic product frame integrally-formed structural part. The electronic product frame integrally-formed structural part comprises a carbon fiber sheet material outer frame made from carbon fiber sheet materials and a metal inner frame made from metal, wherein the carbon fiber sheet material outer frame and the metal inner frame are integrally formed into one body through an injection molding carbon fiber resin composite material. The manufacturing method for the electronic product frame integrally-formed structural part comprises the steps of manufacturing the carbon fiber sheet material outer frame; manufacturing the metal inner frame; and putting the carbon fiber sheet material outer frame and the metal inner frame into an injection molding die, and enabling the carbon fiber sheet material outer frame and the metal inner frame to be combined and formed into one body through the injection molding carbon fiber resin composite material. By adoption of the electronic product frame integrally-formed structural part and the manufacturing method therefor, light and thin overall machine structure, high strength, low weight, and high forming precision can be realized, so that the frame body complex structure can be realized by a simple process in a low-cost and high-quality manner.

The invention provides a soft-packed battery heat control device, particularly relates to the soft-packed battery heat control device capable of being soaked in cooling water and provides a corresponding package material in allusion to the defect of low corrosion resistance of the battery package material in the prior art. The package material is formed by an aluminum foil layer with resistance to corrosion of cooling water and a plastic layer on the surface of the aluminum foil layer.

The invention relates to an optical imaging system, an imaging module, an electronic device and a driving device. The optical image capturing system includes, in order from an object side to an imageside along an optical axis, a first lens group having negative refractive power; a second lens group having positive refractive power; a third lens group having positive refractive power; a fourth lens group having positive refractive power; and a diaphragm provided on the object side of the third lens group. According to the optical imaging system, the lenses in the system are grouped, so that the system can give consideration to a wide viewing angle and high resolution capability, and has the characteristic of miniaturization.

The invention discloses a preparation technology of a Cinacalcet hydrochloride solid dispersion tablet, and belongs to the technical field of preparation of medicinal preparations. The technology is characterized in that the Cinacalcet hydrochloride solid dispersion tablet is prepared through a solid dispersion process and a powder direct tabletting process. The in vitro dissolution rate of Cinacalcet hydrochloride is characterized by 40-80% at 5-10min, 80-90% at 15-20min and 90-100% at 30-45min. The technology has the advantages of simple process, safety, controllable quality, low cost, short production cycle, and suitableness for large-scale industrial production.

The invention discloses a travelling wave tube collector needle and a processing technology thereof. The process comprises the following steps of: 1, preparing materials; 2, lathing; 3, lathing; 4, electrosparking; 5, milling; 6, benching; 7, lathing; 8, benching; 9, de-oiling by trichloroethylene; 10, chemically de-oiling; 11, chemically polishing; 12, detecting; 13, electrosparking; 14, detecting; 15, de-oiling by trichloroethylene; 16, washing by acid; 17, washing by de-ionized water; and 18, packaging. Using the above technical scheme, the manufacturing technology problem of electronic devices with more complex shapes, high processing difficulty and high processing requirements is solved, the quality of product is ensured and the technical requirements of the travelling wave tube on the collector needle are satisfied.

The invention discloses an electronic device's waterproof and drop-proof shell and its preparation method. The shell comprises a carbon fiber sheet structure, an injection molding structure integrally formed on the back surface and the periphery of the carbon fiber sheet structure, a soft rubber protection structure integrally formed on the front surface of the carbon fiber sheet structure, and a silicone waterproof structure integrally molded on the injection molding structure. The carbon fiber sheet structure is integrated with the injection molding structure to form a shell structure with a fixed appearance; a portion of the injection molding structure wraps the peripheral side of the carbon fiber sheet structure while the other portion of the injection structure forms an assembly structure on the back surface of the shell structure; the silicone waterproof structure is formed on the assembly structure so that when the assembly structure is assembled with corresponding structural parts, watertight sealing can be achieved for the elasticity of the silicone waterproofing structure and the interference fit of corresponding assembly components. As a result, it is possible to provide an electronic product shell which is thin in thickness, high in strength, light in weight, capable of realizing its complex structure with a simple process, and has excellent drop resistance and water resistance.

The invention provides a method for improving the etching uniformity of a high aspect ratio tungsten alloy. The method comprises: growing a hard mask on a tungsten alloy substrate; carrying out spin coating of a first layer photoresist on the hard mask, and carrying out photoetching and developing to form a first layer photoresist pattern; etching the hard mask according to the first layer photoresist pattern to form a hard mask pattern; carrying out spin coating of a second layer photoresist, and carrying out photoetching and developing to form a second layer photoresist pattern; carrying outfirst tungsten alloy etching according to the second layer photoresist pattern, wherein the etching depth on the tungsten alloy substrate having a small opening area achieves a load effect amount; and removing the remaining second layer photoresist, and carrying out second tungsten alloy etching according to the hard mask pattern, such that the etching depth on the tungsten alloy substrate havinga small opening area and the etching depth on the tungsten alloy substrate having a large opening area are the same.

The invention provides a 6000m-level underwater micro-camera. The working depth is 6000m. According to the micro-camera, a watertight head, a rear end cover, a micro-camera cylinder and a glass observation window are pressure-resistant parts, and mutual sealing is carried out through rubber seal rings. The rear end cover and the micro-camera cylinder are made by processing high-strength light anticorrosive materials. The glass observation window is made by processing high-strength transparent glass. The integral size of the camera is small, so the camera can be arranged on a submersible conveniently. An image processing circuit board is used for carrying out postprocessing on an underwater video, and the distortion of the underwater video is reduced as much as possible. According to the micro-camera, low-voltage direct current input is employed, and the production and a technology of high-strength pressure-resistant structure materials and the high-transparency optical observation window, a highly integrated CCD imaging technology, a high-pressure sealing and anti-corrosion technology and an underwater low-illumination signal resolution technology are solved. Good video monitoring signals are provided for the submersible such as a great-depth ROV.

The invention relates to a multi-rotor unmanned aerial vehicle design method. The multi-rotor unmanned aerial vehicle design method comprises the steps of firstly, using a computer three-dimensional drawing software to draw structural shapes of a central control box component and power box components according to design requirements and design dimensions; copying a model file into a memory chip pfa fused deposition modeling 3D printing machine to print a three-dimensional model into an entity part; according to the design requirements, using tool equipment to modify, polish and perforate theprinted central control box component and the printed power box components; fixing a pre-arranged flight control board and a pre-arranged receiving machine on a flight control component base by usingadhesive; well connecting cables of the flight control board and the receiving machine and fixing the cables of the flight control board and the receiving machine by using binding straps; bonding a battery pack on the other side of the flight control component base by using a hook and loop and firmly fixing the battery pack by using a magic strap; inserting a battery power supply wire in a distributor plate on the box; fixing the distributor plate in a central control box in a glued manner; arranging wires to connecting blocks along force bearing strips and supplying power to the flight control board by using a voltage regulator; and assembling selected motors and rotors, and fixing the motors and the rotors on motor bases by using bolts. The multi-rotor unmanned aerial vehicle design method has the characteristics of rapid volume production, rapid assembling, high utilization rate of each part and the like.

The invention belongs to the technical field of functional hydrogel materials, and discloses ultraviolet light blocking type hydrogel containing immobilized nanoparticles and a preparation method of the ultraviolet light blocking type hydrogel. A redox initiator formed by nano iron oxide oxidized by zero-valent iron particles and persulfate is adopted to initiate microemulsion polymerization of a monomer with an ultraviolet light blocking function and a carboxyl-containing monomer in the hydrogel to form nano particles with ultraviolet light blocking performance, and EDC/NHS is utilized to realize immobilization of the nano particles in the hydrogel. The zero-valent iron nanoparticles can slowly provide Fe < 2 + > as a slow-release agent to form a redox system with the persulfate after being oxidized, so that the nanoparticles with a light barrier effect are ensured to be formed in the hydrogel under a relatively mild condition, and the curing condition in the next step is relatively mild and is unlikely to damage the hydrogel structure. According to the hydrogel and the method of the invention, the nano particles with the ultraviolet light barrier performance are fixed in a hydrogel system through EDC/NHS, so that the problems of overflow and agglomeration of the nano particles after long-term use are solved.