32results about How to "Fully oriented" patented technology

The present invention provides electrostatic spinning apparatus and its industrial application. The apparatus includes polymer solution conveying machine, spinning nozzle device connected to the outlet of the polymer solution conveying machine, spinning bath below the spinning nozzle device, fiber turning guide roller set inside the spinning bath and electrodes set on the spinning nozzle device and the spinning bath. The apparatus of the present invention is used in spinning polymer, and has greatly raised wet spinning speed, great fiber drafting magnification, well oriented fiber molecule chain, compact fiber structure, greatly raised mechanical performance of fiber, wide solvent selecting range, simplified electrostatic spinning equipment, raised solvent recovering rate and less environmental pollution caused by the solvent.

The invention discloses a new method for preparing polyparaphenyl bracing benedioxazole fiber, including the steps: (1) adding 4,6-diamido resorcinol-terephthalate, multipolyphosphoric acid and P2O5 in the ratio of 1 to 1.5-6 to 0.7-3 to a prepolymerization reaction kettle and making prepolymerization reaction in stages at 80-180 deg.C for 8-15 hr; (2) feeding the prepolymer obtained in step (1) into a double spiral extruder to continue reaction so as to obtain pulp with specific concentration logarithmic viscosity of 20-40 dl/g; (3) continuously extruding the pulp obtained in step (2) into spinning component and then adopting an art of first stretching-then solidifying, and then performing alkali washing, water washing, drying and coilding to make it. The advantages are short reaction cycle, high strength and modulus fiber, simple process and low pollution discharge

The invention relates to a preparation device for a radial orientation permanent magnet ring. An outer magnetic pole is fixed on an outer magnetic pole connection support, and the thickness of the outer magnetic pole is far smaller than the height of a mold cavity. When exciting current passes through a coil, a radial magnetic field is generated in a ranged space of the mold cavity between a core rod and the outer magnetic pole, powder materials in the mold cavity are pushed by an oil cylinder to move vertically in a reciprocating mode, and therefore the power materials sequentially and circularly pass through the plane where the outer magnetic pole is located when the powder materials are pressed. When all the power materials sequentially and repeatedly pass through the plane where the outer magnetic pole is located and are pressed, the powder materials in a whole mold can be fully and uniformly oriented, radial orientation uniformity of the radial permanent magnet ring is greatly improved, meanwhile, axial uniformity of orientation degrees can also be improved, and the advantage is obvious especially for high radial rings. Besides, according to the preparation device for the radial orientation permanent magnet ring, the methods of manual mold release and automatic mold release can be adopted, operation is flexile, and the qualification rate of the pressed radial rings is greatly improved.

The invention discloses liquid crystal epoxy resin as well as a preparation method and an application thereof. The preparation method comprises the following steps: reacting 3,5'-di-tert-butyl-5,3'-dimethyl biphenol with excessive epichlorohydrin in the presence of a phase transfer catalyst, thereby obtaining 3,5'-di-tert-butyl-5,3'-dimethyl diphenyl diglycidyl ether, wherein the softening point of 3,5'-di-tert-butyl-5,3'-dimethyl diphenyl diglycidyl ether is measured to be 10 DEG C through DSC, and the 3,5'-di-tert-butyl-5,3'-dimethyl diphenyl diglycidyl ether is a thick non-solid product at the room temperature; then, selecting a proper curing agent to pre-cure at a low temperature, enabling a biphenyl rid-rod-shaped structure to orientate and arrange with enough time, curing and cross-linking at a high temperature, thereby obtaining a liquid crystal structure. Compared with the conventional preparation method for the rigid-rod-shaped epoxy resin, the preparation method disclosed by the invention is low in curing cost.

The invention relates to a bobbin holder for tensioning a bobbin tube (36) and receiving a wound thread bobbin. The bobbin holder comprises a rotatable drive shaft (1) that is connected to a drive (32) with a bearing end thereof and that has a tensioning device (4) for tensioning a bobbin tube on a tensioning end. The tensioning device (4) comprises a plurality of bobbin tubes (5.2, 5.3) on the periphery of the drive shaft (1) and interposed tensioning rings (6.1). A tensioning piston (7) guided on the free end (2) of the drive shaft acts upon at least one of the bobbin tubes to deform the tensioning rings. In order to allow the use of high fatigue strength materials for the tensioning ring, the tensioning ring comprises a continuous separating slot (20) on the periphery, which extends between two opposite ring ends (21.1, 21.2) of the tensioning ring, deformation being essentially achieved by an expansion of the tensioning ring.

The invention discloses a preparation method for a high-orientation-degree sintered neodymium iron boron permanent magnetic material, and belongs to the field of the rare earth permanent magnetic material. The preparation method is characterized by comprising the steps of mixing neodymium iron boron powder granules and an organic solvent to prepare paste, and pouring the paste into a die; then carrying out non-pressure orientation in a magnetic field to obtain a high orientation degree; next, obtaining a blank with certain density through isostatic cool pressing; and finally, carrying out sintering, densifying, tempering and thermal treatment to obtain the magnet. According to the preparation method provided by the invention, the paste formed by the neodymium iron boron powder and the organic solvent is high in fluidity, and is not pressed by the pressure in the magnetic field orientation process, so that complete orientation and no damage to the paste can be ensured; then certain density and uniform density distribution of the blank can be obtained through the step of isostatic cool pressing; and therefore, sintering densification can be realized, and cracks and falling off of edges and corners caused by uneven density in the sintering process can be avoided as well, so that the high-orientation-degree sintered neodymium iron boron permanent magnetic material can be obtained finally.

A fastening structure for fastening a large solar module (12) to a substructure (14), with at least two holding profiles (26) which are fastenable on the rear side to one component of the solar module (12) and substructure (14), characterized by at least two receiving profiles (60) which are each fastenable to the other component of the solar module (12) and substructure (14) in a relative position to each other corresponding to the relative position of the holding profiles (26), wherein the holding profile (26) and the receiving profile (60) have a mutually complementary profile shape such that the holding profile (26) is receivable in the receiving profile (60) in a substantially form-fitting manner, wherein mutually corresponding engagement formations are provided on at least one intermeshing holding profile (26) and receiving profile (60); pair and are used to engage together the holding profile (26) and the receiving profile (60) in a locking manner.

The invention discloses a granulation method of sintered neodymium iron boron powder materials. The granulation method comprises the following steps of producing sintered neodymium iron boron materials into fine powder materials, wherein the average particle size of the fine powder materials is 2 to 5 microns; adding the fine powder materials into a mold chamber; performing orientation on the fine powder materials through the magnetic field, wherein the magnetic field is larger than 0.8 teslas and the orientation time is larger than 2 seconds; performing compression forming on the fine powder materials to obtain a green body; performing granulation on the green body to obtain the sintered neodymium iron boron powder materials, wherein the average particle size of the sintered neodymium iron boron powder materials is 15 to 100 microns. According to the granulation method of the sintered neodymium iron boron powder materials, the orientation of the sintered neodymium iron boron powder materials is sufficient; the apparent density is high; the liquidity is good; the sintered neodymium iron boron powder materials can be applied to production of products which are thin in wall and high in filled height directly, regular large pieces of blanks do not need to be produced first, and accordingly the production cost is reduced.

The invention discloses a bonded magnet and a preparation method thereof. The magnet includes magnetic powder, an inorganic binder, a lubricant and metallic powder. The preparation method of the bonded magnet includes: mixing the magnetic powder, the inorganic binder, and a solvent to form a magnetic powder mixture. The inorganic binder is any of silicate, phosphate, sulfate and borate, or a mixture of two or more than two of the silicate, phosphate, sulfate and borate; the metallic powder is any of Cu powder, Al powder, Zn powder, copper alloy powder, aluminum alloy powder, and zinc alloy powder, or a mixture of two or more than two of the Cu powder, Al powder, Zn powder, copper alloy powder, aluminum alloy powder, and zinc alloy powder. According to the method, magnetic powder covering is performed through the inorganic binder, and then the problem that the magnetic powder covered by an organic binder is poor in fluidity at a high temperature, so the pre-compressed magnetic powder cannot be evenly and stably filled in a die cavity, and cannot be filled in a thin wall die cavity even can be solved; and the inorganic binder can allow high shape preserving ability of a formed blank at the high temperature, and the formed blank can be directly released from the die when the formed blank is not cooled, and the production efficiency is improved.

The invention belongs to the field of heat-conducting fin preparation technologies and semiconductor heat dissipation, and particularly discloses a preparation method of a directional heat-conducting fin, which comprises the following steps: S1, preparing a fluid composition for the heat-conducting fin; S2, placing the fluid composition obtained in the step S1 in an orientation forming device, applying high-speed shearing force of circular motion to the fluid composition layer by layer, orienting the heat-conducting filler in the fluid composition in the shearing direction, forming oriented thin-layer compositions, collecting the thin-layer compositions in a mold layer by layer, forming a continuous multi-layer collection body, S3, carrying out thermocuring on the multi-layer convergence body to obtain an oriented composition block; and S4, slicing the oriented composition block along a direction vertical to the orientation to obtain the oriented heat-conducting sheet. The convergence body prepared by the method is good in orientation, few in defect and high in efficiency, the heat-conducting fin obtained by slicing treatment has high orientation, high heat conductivity and uniformity, and meanwhile, the heat-conducting fin can be well applied to a semiconductor heat dissipation device.

The invention discloses diphenyl liquid-crystal epoxy resin as well as a preparation method and application thereof. The preparation method of the diphenyl liquid-crystal epoxy resin comprises the following steps of: (1) dissolving diphenyl diphenol in acetone, rising the temperature to 60-80 DEG C, adding potassium carbonate, stirring with 6-bromo-1-hexene for reaction, and obtaining 4,4'-di(5-hexenyloxo)diphenyl; (2) dissolving the 4,4'-di(5-hexenyloxo)diphenyl in dichloromethane, then rising the temperature to 40-50 DEG C, adding peroxide for reaction, and obtaining 4,4'-di(5,6-epoxyhexyloxy)diphenyl; (3) dissolving the 4,4'-di(5,6-epoxyhexyloxy)diphenyl and a curing agent in an organic solvent to obtain mixed liquid; then vacuumizing the mixed liquid till to be constant weight, and after the solvent is volatilized, carrying out sectional curing to obtain the diphenyl liquid-crystal epoxy resin. The diphenyl liquid-crystal epoxy resin, the preparation method and the application disclosed by the invention have the beneficial effects that the curing difficulty is low, the curing cost is low, and the obtained diphenyl liquid-crystal epoxy resin is good in heat-conducting property.

The invention belongs to the field of heat-conducting fin preparation technologies and semiconductor heat dissipation, and particularly discloses a preparation method of a directional heat-conducting fin, which comprises the following steps: S1, preparing a fluid composition for the heat-conducting fin; s2, the fluid composition obtained in the step S1 is placed in an orientation forming device, high-speed shearing force of circular motion is applied to the fluid composition layer by layer, so that the heat-conducting filler in the fluid composition is oriented in the shearing direction, oriented thin-layer compositions are formed, the thin-layer compositions are collected in a mold layer by layer, a continuous multi-layer collection body is formed, and the multi-layer collection body is obtained. S3, carrying out thermocuring on the multi-layer convergence body to obtain an oriented composition block; and S4, slicing the oriented composition block along a direction vertical to the orientation to obtain the oriented heat-conducting sheet. The convergence body prepared by the method is good in orientation, few in defect and high in efficiency, the heat-conducting fin obtained by slicing treatment has high orientation, high heat conductivity and uniformity, and meanwhile, the heat-conducting fin can be well applied to a semiconductor heat dissipation device.

The invention discloses a double-layer PE large-scale hollow blow molding barrel and a production process thereof. The double-layer PE large-scale hollow blow molding barrel comprises a blow molding barrel body, the blowing barrel body comprises an outer coloring layer and an inner raw material natural color layer, the inner raw material natural color layer is located inside the outer coloring layer, the outer coloring layer and the inner raw material natural color layer form a double-layer type blank in a material storage die head, the outer coloring layer and the inner raw material natural color layer are connected in an extruding and hot melting mode in an extrusion die head to form a whole, and the outer coloring layer and the inner raw material natural color layer form an integral layer. According to the double-layer PE large-scale hollow blow molding barrel and the production process, a hollow blow molding mode is adopted, plastic molecules are stretched in two directions duringmolding, the orientation is sufficient, so that the product performance is greatly improved on the basis of injection molding, the durability of the product is improved, the using cost of a user is reduced, the product forming mold is designed in a two-blank simultaneous injecting symmetry mode, the large-gas-quantity double-needle side blowing is adopted, top blowing is used for cooperating auxiliary molding in process at the same time, so that the production efficiency is improved by one time while the product performance is ensured compared with that of a single-cavity mold.