47results about How to "Reduce material density" patented technology

A method and apparatus relating to a biocompatible soft tissue implant is disclosed. The implant, in the form of a prosthesis, is constructed of a knitted pile mesh material arranged into either a 3-dimensional structure or a planar shape or structure. The material or fabric includes a plurality of filament extensions projecting outwardly therefrom. The filament extensions can be radially projecting looping filaments from one or more rows of the knitted pile mesh material. The combination of the filament extensions with the 3-dimensional structure results in the biocompatible implant having a structural resistance to hinder anticipated crushing forces applied to the implant, and also provide a suitable 3-dimensional structure for promoting rapid tissue in-growth to anchor such implant without migration and strengthen the repaired tissue area.

The invention discloses a nylon composite material used for selective laser sintering (SLS). The nylon composite material comprises the components: nylon resin, hollow glass microbeads, a coupling agent, a flow promoter, a light absorber and an antioxidant. The invention also discloses a preparation method of the nylon composite material. When used for SLS shaping, the nylon composite material disclosed by the invention provides lower density while guaranteeing excellent mechanical properties and shaping effect, a shaped workpiece has lighter weight and has high specific strength and specific rigidity, and comprehensive properties of an SLS workpiece are effectively improved, thus the nylon composition material is especially applicable to the manufacturing fields of aviation, spaceflight and the like with high sensitivity to weight of a workpiece.

A secondary battery in which graphite that is an active material can occlude and release lithium efficiently is provided. Further, a highly reliable secondary battery in which the amount of lithium inserted and extracted into/from graphite that is an active material is prevented from varying is provided. The secondary battery includes a negative electrode including a current collector and graphite provided over the current collector, and a positive electrode. The graphite includes a plurality of graphene layers. Surfaces of the plurality of graphene layers are provided substantially along the direction of an electric field generated between the positive electrode and the negative electrode.

The invention relates to a process for manufacturing a magnesium alloy wheel and a process for manufacturing a wheel rim of the magnesium alloy wheel, which comprises: a step of hot extrusion, namely making a sectional material into a more than half ellipse shaped wheel rim semi-finished product in a longitudinal forming device through hot bending; a step of fully rounding, namely rolling the elliptic wheel rim semi-finished product into a full round shape by a rolling circle device, performing further pressurization and rounding on the full-circle wheel rim semi-finished product by a pressure device after performing a preparation process of welding, and finally performing the welding; and a step of air hole processing, namely processing air holes for setting inflating valves. The process for manufacturing the magnesium alloy wheel is further characterized by comprising: a step of plate blanking, namely manufacturing a circular plate and forming a center hole on the circular plate through hot stamping; a step of hot stretch forming, namely performing hot stretch on the circular plate for scheduled times; a step of hot stamping, namely forming a connecting structure and a heat sinking structure on the wheel rim semi-finished product through the hot stamping; and a step of performing a process of gang welding, namely assembling the wheel rim and a wheel spoke into a wheel.

The invention relates to a water-lubricating double-screw air compressor and an air compression method. Some oil molecules can exist in compressed air of an oil-lubricating compressor. The water-lubricating double-screw air compressor comprises a shell, an air-releasing mechanism, a first end cover, a second end cover, a screw type male rotor mechanism, a shaft seal assembly and a screw type female rotor mechanism. The water-lubricating double-screw air compressor is characterized in that water spraying holes are formed in the shell; the screw type male rotor mechanism comprises a male rotor, a gap adjusting module, a first sliding bearing sleeve, a first bearing bush, a first fastener, a second sliding bearing sleeve, a second bearing bush, a second fastener and a second embedding block; the first sliding bearing sleeve is fixed to one head of the male rotor in a sleeving mode and fastened through the first fastener; the first bearing bush is installed on the first sliding bearing sleeve in a sleeving mode and matched with the first sliding bearing sleeve in a gap mode; the first water spraying hole is formed in the first bearing bush and communicates with a gap between the first bearing bush and the first sliding bearing sleeve; and the male rotor and the female rotor are engaged. According to the water-lubricating double-screw air compressor and the air compression method, full water lubrication is adopted, and complete oil-free compression is achieved.

The invention discloses a preparation method of a low-density thermoplastic polyimide micro-foamed material. In the preparation method of the low-density thermoplastic polyimide micro-foamed material, when thermoplastic polyimide is physically foamed by taking one or more of high-pressure fluids CO2, N2, HFC and HCFC as a physical foaming agent and by taking one or more of tetrahydrofuran, chloroform, ethanol, methanol, acetone, pyridine, N-methyl-pyrrolidone, and N, N-dimethylformamide as an organic co-solvent, the high pressure fluid and the organic solvent are kept in high-pressure saturated states in a polyimide sheet, and then, the saturated polyimide sheet is foamed in a high-temperature oil bath. The obtained polyimide micro-foamed sheet is a light-weight and low-density material, is smooth in surface, soft in texture, free of powder dropping in the using process, uniform in cell structure, high in cell density and excellent in tensile property, and is a foamed material with a wide application prospect.

The invention relates to a method for bleaching fibrous materials, in particular lignin-containing materials for producing paper consisting in adding at least a first additive and at least one type of bleaching liquid to a fibrous solution which contains at list one bleaching agent. After mixing said bleaching solution with the fibrous suspension and at the end of determined bleaching time, the bleaching process is ended by adding at least a second additive. Said invention is characterised in that the pH of the fibrous suspension is obtained by adding lime.

The utility model discloses a sewage treatment sampling device capable of automatically sampling step by step and relates to the technical field of river sewage treatment. The device includes a shell,and liquid cavities which are evenly distributed are formed in the middle of the shell. An inner wall of the shell is fixedly connected with positive plates which are uniformly distributed; the innerwall of the shell is fixedly connected with negative plates which are uniformly distributed; the inner wall of the shell is fixedly connected with an electrically connected resistor, the inner wall of the shell is fixedly connected with a spring I, an outer side of the spring I is fixedly connected with a piston, a middle part of the piston is fixedly connected with a dielectric plate, the innerwall of the shell is fixedly connected with an electrically connected electromagnet, and the inner wall of the shell is fixedly connected with uniformly distributed springs II. According to the sewagetreatment sampling device capable of automatically sampling step by step, through the cooperative use of a pressing plate and the electromagnet, when the sampling device is placed in sewage, water pressure can press the pressing plate towards the inner side, the electromagnet at the bottom of a right side is powered on, the sewage is pumped into the liquid cavities, therefore, the automatic sampling effect is achieved, and the sampling efficiency is improved.

The invention discloses a sports shoe sole, which comprises a shoe midsole, a supporting part and an outsole. The shoe midsole is made of a blended material containing an olefin block copolymer and an ethylene-vinyl acetate copolymer, and the olefin block copolymer is The material has the characteristics of high crystallization temperature, fast processing speed, low material density and high resilience. In the original formula of vinyl acetate copolymer sole, a certain proportion of olefin block copolymer is added to improve the rebound rate of the sole and reduce the elasticity of the sole. The thermal shrinkage rate and compression deformation degree of the shoe can enhance the physical and mechanical properties of the sole, help the wearer save exercise energy and improve exercise performance.

A hydrogen storage material including: molecular layers L₁ to L_i+2 which are stacked on one another in parallel and mainly composed of six-membered rings having carbon atoms; and protrusions Pr_1a to Pr_i protruding from atomic planes of adjacent molecular layers L₁ to L_i+2 by lengths of not more than interlayer distances d₁ to d_i+2 of the adjacent molecular layers.

A polymer-based foam composition includes a polymer and up to 20 wt. % talc particles, based on the total weight of the composition. The talc particles include microcrystalline talc.

The present invention provides a carrier core material for use in the production of an electrophotographic developer which, even when applied, for example, to MFPs (multifunction printers), can realize stable, high-quality and high-speed development, and has a prolonged replacing life of magnetic carriers, and a method of manufacturing the same, a magnetic carrier including the carrier core material, and an electrophotographic developer manufactured from the magnetic carrier. An electrophotographic development carrier is prepared by adding resin particles, a binder, a dispersant, a wetting agent, and water to a raw material powder, wet pulverizing the mixture, drying the pulverized product to give granulated powder, calcinatng the granulated powder, and then sintering the granulated powder to prepare a carrier core material having an internally hollow structure, and coating the carrier core material with a resin. An electrophotographic developer is manufactured by mixing the electrophotographic development carrier with a toner.

A negative-electrode plate 22 for use in a cylindrical cell, intended to be laid over a positive-electrode plate 21 with a separator 23 interposed between and rolled to form a cylindrical electrode body 20, with the positive-electrode plate 21 inside, the electrode body being arranged in a bottomed cylindrical outer can 10 to form the cylindrical cell, comprises a first negative-electrode part 22a which is to face the positive-electrode plate 21 on either side, with the separator 23 between, when formed into the electrode body 20, and a second negative-electrode part 22b which is to form the innermost circumference of the electrode body 20 and face the positive-electrode plate 21 only on one side, with the separator 23 between, when formed into the electrode body 20, the second negative-electrode part 22b being lower in negative-electrode active material density than the first negative-electrode part 22a.

The invention discloses a sewage floor drain capable of preventing odor from flowing out and automatically opening and closing by buoyancy, and relates to the technical field of sewage. The sewage floor drain comprises a foundation, wherein a sewage pipe is fixedly connected to the inner wall of the foundation, a shell fixedly connected with the top of the foundation is fixedly connected to the top of the sewage pipe, and sliding wheels symmetrical on two sides are movably connected to the bottom of the middle part of the shell; and the middle part of the shell is movably connected with a connecting column, the inner top wall of the connecting column is fixedly connected with a spring I, and the bottom of the spring I is fixedly connected with a toothed bar connected with the bottom of theconnecting column in an inserted mode. According to the sewage floor drain capable of preventing the odor from flowing out and automatically opening and closing by the buoyancy, through cooperative use of a floating plate and a blocking block, in an initial state, the floating plate and the connecting column are located at the bottom under the action of self gravity, and meanwhile, the blocking block blocks the bottom of the shell, so that upward permeation of gas in the sewage pipe is effectively reduced, therefore the odor outflow preventing effect is achieved, the air quality of a shower cubicle is effectively improved, and the comfort level of a user is improved.

The invention discloses a PVC foaming co-extrusion ASA glass fiber reinforcement technology, and relates to the technical field of PVC foaming plate extrusion. The technology comprises processes of material preparation, extrusion, cooling molding, traction, heating, needle roller treatment, co-extrusion ASA, traction and cutting and the like, and further comprises the process that heat conductionoil is used for heating a needle roller during needle roller treatment. The prepared finished product has relatively high bending strength and elasticity modulus, the problems that a traditional PVC profile is poor in strength and prone to shrinking and deforming and the like are solved, and the good market prospect is achieved.

The invention discloses a preparation method of a magnesium-based composite material applied to an automobile differential support, and relates to a preparation method of a composite material appliedto the automobile differential support. The method aims at solving the technical problem that an existing AZ91D magnesium alloy is not strong enough to replace an aluminum alloy for an automobile differential support. Through spinning spraying and bidirectional stirring, high-entropy alloy particles are added into an AZ91D magnesium alloy melt, the stirring time can be shortened, and the aggregation effect of broken particles is remarkable; X-direction and Y-direction mechanical vibration is conducted simultaneously, aggregation of the particles in a broken side wall area is facilitated, and thus the particles in the side wall area are stirred to the middle of the melt along with shearing to be sufficiently mixed with the melt; and a screen net is placed on the surface of molten metal in amaterial barrel to filter oxidized slag inclusions, and finally an extrusion casting process is conducted to prepare a product. The high-entropy alloy particles are uniformly dispersed, the strengthand hardness of the product are also greatly improved, the interior of the product is free of defects of oxidized slag inclusions, the particles are combined with a base body well, and the applicationsituation of the magnesium-based composite material can be further broadened.

A wafer stage system moves a wafer stage that retains a wafer via a wafer holder along a wafer base. For example, the wafer holder is formed from a material whose density is not uniform, such that the portion that includes the reflecting surface that reflects a measuring beam for position measurement is a high-density portion, and the other portions are low-density portions. Or, the wafer stage is formed from a material whose density is not uniform, such that the portion that includes the surface that constitutes a gas bearing is a high-density portion, and the other portions are low-density portions.

The invention discloses a light filtering material used for sewage treatment of oily waste water. The filtering material comprises, by weight, 100 parts of active carbon, 32-45 parts of cotton, 32-40 parts of zeolite and 3-8 parts of bentonite. The light filtering material used for sewage treatment of the oily waste water is developed according to the characteristics of the oily waste water, the adsorption capacity is greater, the density of the used materials is low, so that the filtering material of unit volume is lighter, and the cost of water treatment is reduced.

The invention is based on the object of providing armoring that is lightweight and exhibits a denser microstructure that is improved as against ceramic composite materials. To this end, armoring against high dynamic impulsive loads is provided that comprises a composite material having at least two phases, the first phase forming a matrix for the second phase, and the first phase being a glass or a glass ceramic, and the second phase being embedded and distributed in the form of particles and/or fibers in the matrix formed by the material of the first phase.

The invention discloses a dot bubble repair device of a touch screen. The dot bubble repair device comprises a movement bracket, a machine body, a pressure head and a pressure head control section, wherein the movement bracket is connected with the machine body; the movement bracket and the machine body can oppositely move up and down; the pressure head is fixed on the movement bracket and can move up and down along with the movement bracket; a heating device is fixed between the pressure head and the movement bracket; the cross section of the pressure head forms a V shape and the longitudinal section forms a U shape. The device disclosed by the invention has the advantages of being simple in structure, simple and convenient for operation by the staff, high in repair yield of product and the like, dot bubbles of the touch screen can be repaired without needing a complicated mechanism design, resources can be effectively saved, the manufacturing cost of the touch screen is reduced, and timely delivery to a customer is ensured.

There is provided a gas turbine combustor which includes a burner component which is molded by 3D additive manufacturing and is optimized in material strength per part. The burner component includes a first part which is used within a first temperature range and/or a first stress range and a second part which is used within a second temperature range which is lower than the first temperature range and/or a second stress range which is lower than the first stress range, and a lamination speed at which a metal material is laminated on the first part by the 3D additive manufacturing is lower than a lamination speed at which the metal material is laminated on the second part.

The invention discloses a paver spiral blade and a paver and belongs to the technical field of road construction devices. The paver spiral blade comprises a blade body and a connecting body arranged on one side of the blade body, and the blade body comprises a back surface and a material guide surface opposite to the back surface. A latticed rib body is arranged on the material guide surface, anda plurality of grooves are formed on the material guide surface by the latticed rib body. The spiral blade is light in weight, resistant to abrasion and high in conveying efficiency.