37results about How to "Raw material requirements are low" patented technology

The invention relates to a novel laminated wood. The novel laminated wood comprises a fir core veneer layer positioned at a central position, two cotton wood veneer layers which are respectively adhered on both upper and lower surfaces of the fir core veneer layer and two laminated wood layers which are adhered on the other surface of the two cotton wood veneer layers respectively, wherein the directions of wood grains of every two adjacent two veneer layers are vertical to each other. The invention also relates to a method for preparing the laminated wood. The method comprises the steps of producing the laminated wood layers, producing the cotton wood veneer layers, producing the fir core veneer layer, sizing, laminating, molding and the like. The novel laminated wood has the advantages of good stability, low cost and environment protection and can be widely used for preparing indoor decoration, such as furnitures, floors, door panels, ceilings and the like.

The invention relates to a preparation method of a multi-dimensional gradient coating layer on a surface of a cutter, and belongs to the technical field of metal cutting and cutter coating. The multi-dimensional gradient coating layer adopts the same coating material system; and components and performances of each deposition layer are controlled through controlling process parameters of the deposition process, so that the components and the mechanical performances of each deposition layer can realize continuous transition from inner layer to outer layer, the mutation of interface element components, physical performances and mechanical performances is prevented, the stress concentration caused by mismatch on interfaces is effectively relieved, and the coating reliability in the use processis improved. The outermost layer of the multi-dimensional gradient coating layer prepared by the method is high in hardness, so that the surface wear resistance can be effectively improved; the interfaces of internal deposition layers are high in bonding strength to effectively improve the coating capacity of resisting such destructions and failures as stripping / layered stripping; and the methodcan be widely applied to the coating treatment field of cutting tools and wear resisting surfaces.

The invention provides a method for preparing a dynamic lithium ion battery diaphragm. The method comprises the following steps: firstly, adding raw materials in a blender, and abundantly stirring; next feeding the stirred materials into a twin-screw extruder, and heating while continuously extrusion, so as to base sheet; thirdly, shunting the base sheet extruded from the extruder and then feeding the shunted base sheet into two same processing lines and simultaneously and respectively processing, wherein the respective processing line is as follows: 1, cooling and forming; 2, transversely and longitudinally stretching the cooled and formed base sheets through a two-way stretch device at the same time, so that the base sheet is stretched to form a diaphragm; 3, extracting out ore oil fromthe diaphragm with an alkane extractant by virtue of an extraction groove; 4, through a transverse stretch device, shaping, stretching and rectifying the diaphragm subjected to extraction, and ensuring the volatilization of the residual extract on the diaphragm; and 5, thermally treating the diaphragm. According to the invention, the defects that when the battery diaphragm is produced in the prior art, the equipment usage amount is large, the equipment cost is high, and the inferior-quality product incidence and production requirement of the prepared lithium ion battery diaphragm are high aresolved.

The invention relates to a novel laminated wood. The novel laminated wood comprises a fir core veneer layer positioned at a central position, two cotton wood veneer layers which are respectively adhered on both upper and lower surfaces of the fir core veneer layer and two laminated wood layers which are adhered on the other surface of the two cotton wood veneer layers respectively, wherein the directions of wood grains of every two adjacent two veneer layers are vertical to each other. The invention also relates to a method for preparing the laminated wood. The method comprises the steps of producing the laminated wood layers, producing the cotton wood veneer layers, producing the fir core veneer layer, sizing, laminating, molding and the like. The novel laminated wood has the advantages of good stability, low cost and environment protection and can be widely used for preparing indoor decoration, such as furnitures, floors, door panels, ceilings and the like.

The invention discloses an ultralow-oxygen-content three-dimensional nitrogen-doped graphene aerogel and a preparation method thereof, belonging to the technical field of graphene aerogel. According to the method, a graphene oxide precursor is adopted for preparation of low-carboxyl highly-hydroxylated graphene oxide through an electrolytic method; and then one-step hydrothermal reduction nitrogen-doped in-situ self-assembling and high-temperature sintering are conducted to obtain the ultralow-oxygen-content three-dimensional nitrogen-doped graphene aerogel with a light three-dimensional grid structure, wherein an oxygen content is less than 0.1 at.%, a nitrogen doping amount is 4-12%, and pyridine type nitrogen accounts for 30-80%.

The invention provides an inductance element and its preparation process, comprising an inner layer main body and an outer layer protective layer, the outer layer protective layer is combined with the inner layer main body by overmolding; the inner layer main body It includes a magnetic core, a coil and a pin; the magnetic core and the coil are completely wrapped in the outer protective layer, and the connection end of the pin and the magnetic core is wrapped in the outer protective layer In the layer, the free ends of the pins protrude from the outer protective layer. In the inductance element of the present invention, the magnetic core and the coil are all wrapped in the outer protective layer, which is safe to use and simultaneously solves the problem of inductive disconnection without inductance; moreover, the outer protective layer of the inductive element of the present invention is composed of multiple layers Composition, high voltage resistance, more suitable for the needs of modern LED development.

The invention relates to a hard carbon binder, a negative plate containing the hard carbon binder and a sodium ion battery. The hard carbon binder is chain-shaped sodium polyacrylate PAAS or a PAAS copolymer; and the hard carbon binder is used as a sodium ion battery negative electrode binder. The hard carbon binder provided by the invention does not have the problem that the traditional negative electrode dry binder polytetrafluoroethylene (PTFE) is easy to decompose under low pressure, and has the advantages of short process time and low environmental requirements; when the negative electrode material is used for preparing the dry-method sodium ion battery, the advantages of high surface density, simple process and low cost are achieved; and sodium ions in PAAS can migrate in the electrode, so that the electrode has the advantage of supplementing the sodium ions.

The invention discloses an antiwear close-packed armor roll surface, and belongs to the field of roller presses (high-pressure roller mills). The antiwear close-packed armor roll surface comprises a roll surface base body and an antiwear armor layer, wherein the antiwear armor layer is fixed on the roll surface base body and is composed of a plurality of armor units which are tightly arranged and are fixed on the roll surface base body through bolts; and each overall armor unit is a cone body and is composed of a regular hexagonal prism body on the upper part and a cone body on the lower part. The roll surface base body disclosed by the invention is not easy to wear; the demands on the materials and the processing equipments of the roll surface base body are reduced; the fabrication cost is reduced; the roll surface disclosed by the invention is good in wear resistance and long in service life; and a surface wear-resisting layer is not easy to wear, can be used at relatively high temperature and is easy to assemble and disassemble.

The invention proposes a thermal-cracking-resistant Al-Cu series cast aluminum alloy and a preparation method thereof, aiming at the problem of hot cracking of Al-Cu-based cast aluminum alloys with high copper content, by adding various strengthening elements and inhibiting elements, the strength of the material is improved. Increase the elongation and reduce the solidification temperature range during the pouring process, while increasing the grain boundary dragging effect. The percentages of each component and weight in Al-Cu cast aluminum alloy are: Cu: 4%-6%, Mn: 0.7%-1.5%, Ti: 0.1%-0.4%, B: 0.005%-0.06%, V : 0.005% to 0.030%, the balance being Al. By increasing the content ratio of Mn element in Al-Cu-based casting alloy, the dispersed particles of MnAl16 compound are formed and distributed along the grain boundary, which hinders the growth of recrystallized grains; at the same time, iron impurities are melted to form (Fe, Mn)Al16 compound, reducing Harmful effects of small iron. Significantly improved the hot cracking resistance and elongation of Al-Cu series casting alloy.

The present invention proposes an Al-Cu series casting alloy suitable for forging processing and a preparation method thereof. Aiming at the problem that the Al-Cu series casting alloy with high copper content is difficult to forge, the pouring process is shortened by adding various strengthening elements and inhibiting elements Medium solidification temperature range and increase the grain boundary dragging effect, reduce the generation of dendrites, etc., to achieve the effect of enhancing the forging performance of the material. The percentages of each component and weight in Al-Cu series casting alloy are: Cu: 4%~6%, Mn: 0.5%~1.0%, Si: 0.4%~0.8%, Mg: 0.3%~0.6%, Ti: 0.15% to 0.4%, the remaining impurities <0.5%, and the balance is aluminum. By increasing the content ratio of Mn element and Si element in Al-Cu-based casting alloys, the Si phase is refined and dispersed and the second phase particles (Al 2 Cu, ALCuFeMn compound equal) a large number of dispersed precipitation, the pinning effect is strengthened, which significantly improves the forging performance of Al-Cu series casting alloys. The mechanical properties after forging are tensile strength ≥ 500MPa, yield strength ≥ 350MPa, and elongation ≥ 15%.

The invention belongs to the technical field of planar optic splitters, and particularly relates to a method for manufacturing an optic waveguide. The method comprises the steps of: forming a layer of photoresist on a glass substrate; carrying out photoetching to form a graph; forming an optic waveguide core layer with high refractive index in a groove between the photoresist; stripping the photoresist; and forming an upper film coating layer with low refractive index. The method for manufacturing the optic waveguide is simple in technological process, low in requirements of raw materials andproduction equipment, low in production cost and easy for realizing industrialized scale production.

The invention discloses a cationic polymer and a preparation method thereof, belonging to the technical field of water-soluble polymer preparation. The preparation method is as follows: add dimethyl diallyl ammonium chloride monomer into the reaction kettle, add viscosity regulator, metal ion chelating agent, chain transfer agent and deionized water under stirring to form a polymerization solution, and pass it into Nitrogen to drive out the air; raise the temperature to 75-95°C, start dropping the initiator and dimethyl diallyl ammonium chloride monomer at a predetermined rate for 2-4 hours; add the curing agent dropwise at 75-105°C, and mature for 1 After ~3 hours, dilute with water to obtain the target product. The invention adds a viscosity regulator to the reaction system to keep the product in a fluid state when polymerized to a relatively high molecular weight, which facilitates the dispersion of initiators and curing agents and the diffusion of free radicals, and improves the efficiency and effect of residue removal.

The invention relates to a novel deep stretching process of a curved surface. A structure of a stretching material of a product is cut by adopting special equipment; the stretching material is welded into a closed structure; after a welding seam is reshaped and a swaging is subjected to reversal pretreatment, a rudiment of the treated closed product is put in the curved surface or a cambered mould; and a required shape is pressed by utilizing the stamping press of the mould through one-time forming. The novel deep stretching process comprises the specific operating steps: cutting, closing, welding, the reshaping of the welding seam and the reversal pretreatment and the stretching of the swaging. The novel deep stretching process has the advantages of simple process, convenient operation, one-time stretch forming, time saving, improved efficiency, needlessness of repeatedly annealing and tempering treatment, high stretching quality, low requirement on raw materials, accurate shape of aformed product without the defects, of stretching pieces, such as surface dents, salient points, avulsion and the like, and low comprehensive cost.

The invention provides a method for preparing a dynamic lithium ion battery diaphragm. The method comprises the following steps: firstly, adding raw materials in a blender, and abundantly stirring; next feeding the stirred materials into a twin-screw extruder, and heating while continuously extrusion, so as to base sheet; thirdly, shunting the base sheet extruded from the extruder and then feeding the shunted base sheet into two same processing lines and simultaneously and respectively processing, wherein the respective processing line is as follows: 1, cooling and forming; 2, transversely and longitudinally stretching the cooled and formed base sheets through a two-way stretch device at the same time, so that the base sheet is stretched to form a diaphragm; 3, extracting out ore oil fromthe diaphragm with an alkane extractant by virtue of an extraction groove; 4, through a transverse stretch device, shaping, stretching and rectifying the diaphragm subjected to extraction, and ensuring the volatilization of the residual extract on the diaphragm; and 5, thermally treating the diaphragm. According to the invention, the defects that when the battery diaphragm is produced in the prior art, the equipment usage amount is large, the equipment cost is high, and the inferior-quality product incidence and production requirement of the prepared lithium ion battery diaphragm are high aresolved.

The invention discloses an antiwear close-packed armor roll surface, and belongs to the field of roller presses (high-pressure roller mills). The antiwear close-packed armor roll surface comprises a roll surface base body and an antiwear armor layer, wherein the antiwear armor layer is fixed on the roll surface base body and is composed of a plurality of armor units which are tightly arranged and are fixed on the roll surface base body through bolts; and each overall armor unit is a cone body and is composed of a regular hexagonal prism body on the upper part and a cone body on the lower part. The roll surface base body disclosed by the invention is not easy to wear; the demands on the materials and the processing equipments of the roll surface base body are reduced; the fabrication cost is reduced; the roll surface disclosed by the invention is good in wear resistance and long in service life; and a surface wear-resisting layer is not easy to wear, can be used at relatively high temperature and is easy to assemble and disassemble.

The invention relates to an etching technology and provides a film covering method of metal strip for etching, an etching method and film covering equipment. The film covering method comprises steps of film covering, first die cutting, first demoulding, second film covering, second die cutting, third film covering, fourth film covering and second demoulding. The film covering equipment comprises a first film covering device, a first die cutting device, a first demoulding device, a second film covering device, a second die cutting device, a third film covering device, a fourth film covering device and a second demoulding device sequentially arranged and enabling metal strip to continuously move. According to the invention, the following steps are finished in sequence: the metal strip is coated with an adhesive film, the adhesive film on an etching area of the metal strip can be mechanically removed, a non-etching area is protected, and the etching area is in direct contact with etching liquid, so that labor force is saved, the processing cycle is shortened, proportion of a chemical reagent is reduced, requirements for the environment and the raw material are lowered, reliability of the non-etching area is improved, and the production efficiency is greatly improved.

The invention provides a 3D printing method for selective laser solidification of metal, which belongs to the technical field of 3D printing forming. Firstly, the metal powder is mixed with the liquid photosensitive resin, and then a dispersant is added to the slurry to adjust the rheological properties of the slurry to prepare a photosensitive slurry with an appropriate solid phase volume fraction and good rheological properties. The 3D printing device is used to extrude the slurry from a nozzle with a certain diameter; at the same time, in the process of slurry streamline extrusion, dispersion and accumulation, a fine laser beam selection is used to scan synchronously on the slurry streamline plane, making it Partial rapid solidification forming, reciprocating, so that the forming of metal parts of a certain shape can be realized. The invention can directly form high-precision metal parts, has high forming speed, high part strength, uniform density, low cost and no special requirements on working environment.

The invention relates to a portable automatic paper board cutting machine. The portable automatic paper board cutting machine is composed of a paper cutting trolley and a paper board installing frame;a tool base is rotationally arranged on a bottom plate of the paper cutting trolley, and can rotate to switch a tool position, and up and down reciprocating movement of a tool is achieved due to camrotation; under control of a control system, cutting on a paper board can be automatically completed; the volume is small, the structure is simple, use in a family, a school, an office and other places is convenient, the cutting efficiency is high, and cutting types are diverse; the paper board installing frame can stretch out and draw back, so that adaptability to paper boards in different specifications is achieved; and requirements for a paper board raw material are low, no customized paper board is not needed, recycling and utilizing of the paper board are facilitated, and environment protecting and energy saving are achieved. According to the paper board cutting machine, due to connection of the control system, a network terminal and a database, resource sharing can be achieved, the information interactive capacity is high, and communication and sharing between users are facilitated.