Patents
Literature
Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

654results about How to "Dimensionally stable" patented technology

Cold-hot compound die molding method for aluminum alloy sheet metal component

ActiveCN102615201ADimensionally stableDimensional change, shape stability can be obtained directly through one-time formingShaping toolsMetalAluminium alloy
The invention discloses a cold-hot compound die molding method for an aluminum alloy sheet metal component, and relates to a molding method for a sheet metal component. The invention aims to solve the technical problems that the conventional hot-state molding method for the aluminum alloy sheet metal component is low in molding efficiency and can easily cause local crinkles and fractures, and provides the cold-hot compound die molding method for the aluminum alloy sheet metal component. The cold-hot compound die molding method comprises the following steps of: 1, heating a lower die to a temperature of between 200 and 900 DEG C; 2, placing an aluminum alloy plate blank on the lower die and heating the aluminum alloy plate blank to the deformation temperature of the aluminum alloy plate blank; 3, closing the die to press the aluminum alloy plate blank into the aluminum alloy sheet metal component; 4, separating the aluminum alloy sheet metal component, an upper die and a blank holder from the lower die; and 5, cooling the upper die and the blank holder, keeping the temperature for a certain period of time, and taking the aluminum alloy sheet metal component down to finish the cold-hot compound die molding of the aluminum alloy sheet metal component. According to the method, a cold-hot compound die in which the upper die is in a cold state and the lower die is in a hot state is adopted to mold the aluminum alloy sheet metal component. The cold-hot compound die molding method is suitable for making the aluminum alloy sheet metal component.
Owner:天津哈工永兴科技有限公司

Method for preparing carbide film by carbonizing graphene reinforced polyimide resin

The invention discloses a method for preparing a carbide film by carbonizing graphene reinforced polyimide resin, and relates to a method for preparing a carbide film. The method solves the technical problems of high carbonizing temperature, high energy consumption, long carbonizing period and low carbonizing rate and low strength of the carbide film in the conventional method for preparing the carbide film. The method comprises the following steps of: 1, adding 4,4'-diamino diphenyl ether (ODA) and 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) into N,N-dimethyl acetamide (DMAC), and performing mechanical stirring to obtain a polyamide acid (PAA) solution; 2, adding graphene into the PAA solution, and performing in-situ polymerization reaction to obtain a solution A; 3, spreading the solution A on a clean glass plate, heating to the temperature of 60 DEG C and preserving the heat for 2 hours, heating to the temperature of 100 DEG C and preserving the heat for 1 hour, heating to the temperature of 200 DEG C and preserving the heat for 1 hour, heating to the temperature of 300 DEG C and preserving the heat for 1 hour, and thus obtaining a composite film; and 4, carbonizing, naturally cooling to room temperature, and thus obtaining the carbide film. The carbide film has excellent mechanical properties; and because the adding proportion of the graphene is increased, the mechanical properties of the carbide film are improved, the specific capacitance of the graphene is also improved, and the carbide film is suitable to be used as an electrode material.

Wood powder reinforced polyurethane wood-imitation material for furniture and production method thereof

The invention discloses a wood powder reinforced polyurethane wood-imitation material for furniture and a production method thereof. The mixture of polyether glycol, foaming agent, catalyst, stabilizing agent and fire retardant serves as a white material, polyisocyanate serves as black material, and wood powder filler with 80-100 meshes serves as the stabilizing agent, wherein, the mass ratio of white material to black material to wood powder is 112:112:7. The production method is as follows: respectively mixing the white material according to ratio to prepare composite polyether; adding wood powder to prepare wood powder/ composite polyether mixture; then, adding the black material to prepare foaming mixture; and after injection molding and curing for 20 minutes, demolding to prepare the wood powder reinforced polyurethane wood-imitation material. The invention has the advantages that the compression strength and the shock resistance of the produced wood-imitation material and products are strengthened, wood texture effect is obvious, and density distribution is improved; the produced wood-imitation material and the product have stable size, small deformation and favorable heat insulation and sound insulation performance and are hard and ageing-resistant; flame retardant property can reach construction B2 grade, the product is environmentally-friendly and has low cost as well as favorable handling characteristics, such as sawing, digging, drilling, nailing, rubbing, sticking, coloring, coating and the like.
Owner:德华兔宝宝装饰新材料股份有限公司

Antibacterial spandex fiber and preparation method thereof

The invention discloses an antibacterial spandex fiber and a preparation method thereof. The antibacterial spandex fiber is prepared by combining a wrapper and a core part, wherein the section of the fiber is solid; the material of the core material is a polyurethane slice for melt spinning; the wrapper comprises the following raw materials in percentage by mass: 0.1-0.2% of a silver ion compound, 0.1-0.5% of an ultraviolet screening agent, 0.1-0.55 of an antioxidant,0.2-1.0% of a lubricant, 0.1-0.5% of a matting agent and 97.3-99.4% of fiber forming aggregate. The preparation method of the antibacterial spandex fiber comprises the following steps: 1 manufacturing an antibacterial spandex core part by a melt spinning technique according to the formula ratio; 2 manufacturing an antibacterial spandex wrapper by a wet-dry spinning technology according to the ratio; and 3 spinning by wet-dry spinning equipment and process through a special spinneret assembly, and thus preparing the antibacterial spandex fiber by a special coagulating bath. The preparation method of the antibacterial spandex fiber is simple in process; the antibacterial agent is low in amount, economical and practical; and the prepared antibacterial spandex fiber is stable and uniform in performance, broad-spectrum antibacterial and lasting in antibacterial effect.
Owner:ZHEJIANG HUAFENG SPANDEX

Method for preparing multi-shape controllable nano nikel-cobalt spinel oxide

The invention relates to a method for preparing multi-shape controllable nano nikel-cobalt spinel oxide. The method includes the steps that nickel nitrate and cobalt nitrate are dissolved in anhydrous ethanol according to the cobalt-nickel atom ratio to form a solution A; oleylamine is dispersed in an ethanol solution to form a solution B, and the solution B and the solution A are mixed to obtain a mixed solution; the mixed solution is fully and evenly stirred and moved into a dynamic reaction kettle, H2 is replaced in a sealed mode, pressure intensity of H2 is adjusted to 6-15 bar after replacement, and a steel cylinder air outlet valve is closed; the stirring speed of the dynamic reaction kettle is adjusted to 400 r/min, temperature is set to be 150 DEG C, and reaction is carried out for 10 h; a product is cleaned through ethanol and other nonpolar solvents respectively, centrifugal separation is carried out, and a sediment precursor is obtained through drying at the temperature of 60 DEG C; the temperature of the obtained sediment precursor rises in an air atmosphere at the speed of 10 DEG C/min, and the sediment precursor is heated to 200-400 DEG C and kept warm. According to the method, procedures are few, materials are easy to get and low in price, the procedures are safe, nikel-cobalt spinel oxide of different shapes can be obtained by changing a small condition in the procedures, and accordingly preparing of the controllable nano nikel-cobalt spinel oxide is achieved.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI

Low-wool-content multi-component chemical fiber blended fabric and preparing method thereof

The invention provides a low-wool-content multi-component chemical fiber blended fabric and a preparing method of the low-wool-content multi-component chemical fiber blended fabric and belongs to the field of spinning dyeing and finishing. Wool is added to multi-component chemical fibers and the low-wool-content multi-component chemical fiber blended fabric comprises, by weight, 30% to 40% of polyester staple fibers, 20% to 30% of modified polyester fibers, 10% to 20% of mucilage glue, 5% to 15% of Tencel, 8% to 30% of the wool and 0.1% to 0.6% of conductive fibers. The wool content of a traditional product is changed, wool fibers with the content smaller than 30% are blended with the polyester staple fibers, the modified polyester fibers, the mucilage glue, the Tencel and the conductive fibers in the chemical fibers in a combined mode, so that mutual advantage complement of the various fibers is achieved, and multiple colors, the high comfort degree and the easy-maintenance performance of the fabric are achieved with the low wool content. The technology is reasonable, the technical purpose of one bath dyeing of the wool and the multi-component chemical fibers is effectively achieved, and a new path is created for upgrading orientation and the comfort of chemical fiber fabric.
Owner:SHANDONG WOYUAN NEWFASHIONED FABRIC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products