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185results about How to "Substantive" patented technology

Radial-reverse combination extrusion forming mold of thin-wall cylindrical piece with outer boss

The invention discloses a radial-reverse combination extrusion forming mold of a thin-wall cylindrical piece with an outer boss. The mold comprises an upper mold assembly, a lower mold assembly, a male mold, a female mold, a mandrel, a core support, an extrusion ring, an ejection block and a movable block, wherein the male mold is mounted on the upper mold assembly, the core support is mounted atthe bottom of the mandrel, the mandrel drives the core support to slide and stretch out and draw back of the male mold, and the extrusion ring sleeves the part stretching out of the core support; thefemale mold is mounted on the lower mold assembly, a cavity and a movable block groove are arranged in the female mold, the core support and the cavity are located on the same central shaft, after themovable block groove allows the movable block to be placed and is filled with the movable block, the shape of the cavity is a full cylinder shape, the ejection block is arranged in the cavity, the height of the ejection block is smaller than the height of the cavity, the upper part of the movable block protrudes out of the ejection block, the side surface forms an inwards-concaved boss cavity, and the outer diameter of the extrusion ring is the same as the diameter of the female mold cavity. The radial-reverse combination extrusion forming mold of the thin-wall cylindrical piece with the outer boss can directly form the thin-wall cylindrical piece with any position, size and number of bosses at one step, and the mechanical performance of the thin-wall cylindrical piece is greatly improved.
Owner:ZHONGBEI UNIV

Filter material, filter element, filter module and machining method thereof

The invention provides a filter material, a filter element, a filter module and a machining method thereof. The filter material comprises rattan cores, rattan peels and poplar. At the first stage, the rattan cores are crushed into fibers and the rattan peels are softened and crushed into fibers; the poplar is crushed into fibers; at the second stage, all the materials are mutually dissolved; at the third stage, solid-liquid separation is carried out to obtain solid-state substances; the solid-state substances are dried to obtain the filter material; then the filter material is paved and rolled to obtain fiber cloth; the fiber cloth is subjected to die cutting and molding to obtain the filter module; cellulose acetate fibers which account for at least 30% of a ratio of the mixture is added to obtain a micro-filtration filter material; flower or Chinese herbal medicine fiber-shaped grains are added to obtain the filter material with fresh air attaching effect, and sterilization, deodorization and refreshing effects. According to the invention, the filtering effect is greatly increased and the service life of the filter element is prolonged; meanwhile, the air inlet quality is optimized and the air inflow is guaranteed; compared with other filter materials in the same grade, the filter material has small resistance, light weight, high capacity, environmental friendliness (combustible property) and low cost.
Owner:沃卡瑞(天津)贸易有限公司

Low-blood-loss micro axial-flow type artificial heart

InactiveCN103083742ASubstantiveAvoid blood clot problemsSuction devicesProsthesisHemolysisThrombus
The invention discloses a low-blood-loss micro axial-flow type artificial heart which comprises a vane wheel, a motor rotor, and a motor stator, wherein the vane wheel is arranged inside the motor rotor in an interference fit and coaxial mode, the vane wheel is placed between an entry guide vane and an exit guide vane, two flow-guiding cones with large ends of 3mm are respectively arranged on an inlet end of the entry guide vane and an outlet end of the exit guide vane, the conical degree of the flow-guide cone is 90 degrees, and the two flow-guiding cones are in symmetrical arrangement. The helical angle of each flow-guiding vane on the entry guide vane gradually reduces from 90 degrees to 30 degrees along the axial direction from the inlet end to the outlet end, and the helical angle of each flow-guiding vane on the exit guide vane 3 gradually increases from 30 degrees to 90 degrees along the axial direction from the inlet end to the outlet end. The vanes on the vane wheel and all the flow-guiding vanes are in the shape of a logarithm helical line. Shaftless drive of the vane wheel reduces thrombus risk, and the micro structure improves the ability to implant. The low-blood-loss micro axial-flow type artificial heart has the advantages of being low in hemolysis, strong in implanting ability, simple in structure, high in reliability and the like.
Owner:JIANGSU UNIV

Surface sizing agent and its production method

The invention relates to a method for preparing a surface sizing agent for papers. The raw materials used for preparing the surface sizing agent for papers consist of main agents and assistant agents. The main agents are rigid monomers, soft monomers and functional monomers; and the assistant agents are compound emulsifying agents, protective colloids and evocating agents. The proportions of the main agents by weight are as follows: 100 portions of rigid monomers, 40 to 100 portions of soft monomers and 5-40 portions of functional monomers; and the proportions of the assistant agents by weight are as follows: 1 to 10 portions of compound emulsifying agents, 1 to 10 portions of protective colloids and 1 to 8 portions of evocating agents. Compared with the styrene-maleic anhydride surface sizing agent prepared by common emulsifying agents, the surface sizing agent for papers prepared by the method has good mechanical stability, the latex contains no residual emulsifying agents, the particle surface is clean, and no side influence resulted from the emulsifying agents is existed during the sizing and drying process; the surface sizing agent has good membrane forming performance on the paper surface so as to provide excellent water-proof performance and surface flatness for the paper; and the surface sizing agent can increase the stiffness and the smoothness of the paper surface greatly.
Owner:上海埃格环保科技有限公司

Radial-reverse combined extrusion molding method for thin-walled cylindrical piece with outer bosses

The invention discloses a radial-reverse combined extrusion molding method for a thin-walled cylindrical piece with outer bosses. A radial-reverse combined extrusion mold for the thin-walled cylindrical piece with the outer bosses is related in the method. The mold comprises a male mold, a female mold, a mandrel, a core support, an extrusion ring, a top block and a movable block. The core supportis installed at the bottom of the mandrel. The extrusion ring is connected to the extending outer portion of the core support in a sleeving mode. A cavity and a movable block groove are formed in thefemale mold. The upper portion of the movable block protrudes out of the top block. An inwards-concave boss type cavity is formed in the side face of the top block. The method includes the steps thatthe male mold downwards presses the extrusion ring and a hollow blank, the blank flows in the radial direction to fill in the boss type cavity, then the extrusion ring is omitted, the hollow blank moves down along with the male mold to be extruded into the thin-walled cylindrical piece, the thin-walled cylindrical piece is reversely extruded to rise, the movable block is driven to move up together, and the height of the thin-walled cylindrical piece is increased. By means of the scheme, the thin-walled cylindrical piece with an arbitrary number of bosses with arbitrary sizes at arbitrary positions can be directly formed at a time, and the mechanical performance of the thin-walled cylindrical piece is greatly improved.
Owner:ZHONGBEI UNIV

Preparation and degradation methods of hot-melt phenolic resin and composite material thereof

The invention provides preparation and degradation methods of hot-melt phenolic resin and a composite material thereof, and relates to the technical field of high polymer materials and chemical recovery thereof. The preparation method of the hot-melt phenolic resin comprises the following specific steps of: carrying out heating reaction on a phenolic compound and an aldehyde compound under the action of a catalyst, cooling, adding arylboronic acid and a derivative thereof, heating, boiling and refluxing again, carrying out decompression dehydration after the reaction is finished, adding a modifier and a flexibilizer, and vacuumizing to obtain the hot-melt phenolic resin. The preparation method of the hot-melt phenolic resin-based composite material comprises the following steps of: preparing a resin adhesive film from the hot-melt phenolic resin by adopting a hot-melt preimpregnation method, compounding the resin adhesive film with a fiber reinforcement body, and carrying out hot-pressing treatment to obtain the hot-melt phenolic resin-based composite material. The hot-melt phenolic resin and the hot-melt phenolic resin-based composite material are heated and decomposed in an ethanol or acetone solvent, and can be degraded and recycled. The preparation process is simple to operate and low in energy consumption, the production process is easy to control, and large-batch continuous production can be realized. The degradation process is safe, environment-friendly, green and pollution-free.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
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