56results about How to "Reduce subsequent processing" patented technology

The invention relates to a diamond/copper composite material with high heat-conducting property and a preparation method thereof and belongs to the field of metallic materials. The diamond/copper composite material is composed of copper or copper alloy, diamond particles and a transition layer, wherein volume fraction of the copper or copper alloy is 38-49%, the volume fraction of the diamond particles and the transition layer is 62-51%, and particle size range of diamond is 80-130Mu m. A preparation technological process comprises the following steps: carrying out pre-treatment on the diamond, plating by adopting a salt bath, preparing a performed blank, and preparing a composite material by carrying out non-pressure infiltration. The diamond/copper composite material has the advantages that a diamond/copper composite material with high volume fraction and high heat-conducting property can be directly moulded and prepared, the prepared composite material is high in density, uniform in tissue distribution, controllable in interface thickness and high in thermal conductivity, processing equipment is simple, operability is strong, energy consumption and cost are low, mass production can be realized, heat-conducting property is high, and the diamond/copper composite material can be applied to the field of thermal management or electronic packaging.

The invention relates to a method for preparing zirconium oxide ceramic, which comprises the following steps of: preparing high solid phase slurry by adopting low-toxicity gel and dispersant, then adding an initiator, performing vacuum deaeration, injecting the slurry into a mold, curing and stripping to obtain a green body, and drying and sintering the green body to obtain the ceramic. The method is used for preparing the green body which has good surface finishment, peeling resistance, cracking resistance, good uniformity and high strength, the strength of the green body is 20 to 40MPa, andthe green body can be directly machined so as to effectively reduce the subsequent processing cost; and the green body can be sintered into the ceramic at one time, the yield reaches 100 percent, theceramic has excellent performance and good stability, the strength is 800 to 1,200MPa, the fracture toughness is 10 to 20MPa.m1/2, the average strength is 550MPa compared with the strength of the drypressing molded ceramic, the average fracture toughness is 8MPa.m1/2, and the performance of the ceramic is greatly improved.

The invention relates to a method for preparing high-thermal-conductivity silicon nitride ceramics. The method comprises the steps that firstly, thermal treatment and acid pickling treatment are carried out on Si3N4 powder, and then Si3N4 slurry is prepared; an Si3N4 thin layer is prepared through a casting process technology, and porous silicon nitride powder prefabricated bodies are obtained after the thin layer is cut and overlapped; the prefabricated bodies are subjected to liquid silicon penetration through high-purity silicon powder, and compact Si3N4/Si is obtained; nitrogen treatment is carried out on Si3N4/Si in a nitrogenation oven, so that Si in the material is subjected to a nitriding reaction to generate Si3N4. Compared with frequently-used processes for preparing the high-thermal-conductivity silicon nitride ceramics, such as isostatic pressing sintering and hot pressed sintering, a tape casting method is combined with liquid silicon penetration forming and nitriding sintering processes, no or little machining is needed, preparation temperature is low, no sintering additive needs to be added, and the influence of a grain boundary on the thermal conductivity of the material is avoided. The thermal conductivity of the prepared silicon nitride ceramics can reach 80-120 Wm<-1>K<-1>.

The invention relates to a truck and motor coach magnesium hub rotary-swaging forming method. The method utilizes certain temperature and pressure and adopts rotary-swaging forming to enable magnesium alloy to be formed according to a predetermined die shape. The method comprises the technological steps of blank preparation, blank preheating, extrusion (pre-machining), blank pre-heating, rotary-swaging forming, heat treatment, machining, paint spraying and forming. Magnesium alloy automobile hubs produced by means of the method is high in finished product rate and stable in mechanical property, follow-up machining can be decreased, and machining amount and energy consumption can be reduced. By means of the method, large-sized hubs can be produced, and hub weight can be decreased.

The invention relates to a method for shaping contact lenses and a mould, particularly a method which can use simple moulds for forming the contact lenses. The method comprises the following steps: placing the contact lens material in a die cavity of a mould; then, using the mould of an auxiliary appliance to press the lens material in the die cavity; causing the lens material to spread and extend along an arc surface of a die cavity and a mould; pushing excessive materials and overflowing out of the corner cut edge; proving the retained surface at the outer part of the mould for jointing the corner cut edge; removing the excessive materials; solidifying and treating the lens material in the mould; jointing the lens material on the surface of the mould of the auxiliary appliance; shaping glasses of the contact lenses after testing; packaging after injecting buffer solution in the appliance space of the outer part of the mould of an auxiliary appliance; and manufacturing products for selling. The contact lens has the advantages that the manufacturing procedure is simple and fast; and the purposes for saving labor and time, reducing the manufacturing cost, and keeping with the economic effect can be achieved.

The invention relates to a foamed plastic packing box and a preparation method thereof. Aim at solving problems produced in packing box production thereby satisfying increasing requirements from people on packing boxes, the invention provides the foamed plastic packing box and the preparation method thereof. The foamed plastic packing box comprises: by weight, 90 to 110 parts of polystyrene resin, 0.8 to 0.9 parts of sodium bicarbonate NaHCO3, 0.046 to 0.078 parts of silicone oil, 11 to 14 parts of modified polystyrene resin and 2.5 to 5 parts of industrial starch. Compared with the prior art, the foamed plastic packing box reduces environmental pollution, has good environmental benefits, reduces follow-up processes, and has a low cost and a good cost-performance ratio.

The invention relates to a boron carbide ceramic ball and a preparation method thereof. The preparation method comprises the following steps: (1) performing spray granulation on boron carbide powder,carbon black powder, a surfactant A, a sintering aid and a binder to obtain boron carbide granulating powder; (2) heating and stirring the boron carbide granulating powder obtained in the step (1), asurfactant B and a high polymer binder, mixing and crushing to obtain injected granules; (3) performing injection molding on the injected granules obtained in the step (2) to obtain a spherical greenbody, degreasing and sintering the obtained spherical green body to obtain the boron carbide ceramic ball. Compared with the prior art, the preparation method has the advantages that the boron carbideceramic ball with relatively high degree of sphericity can be prepared, a prepared material used in the grinding process is small, the efficiency is high, and the production cost can be better saved.

The invention discloses a copper conic liner and a preparation method thereof. The copper conic liner comprises a supporting column body, a liner top, an inner wall surface and an outer wall surface, wherein the supporting column body is connected with the liner top. The preparation method is characterized in that a laser fusion covering type rapid forming method is adopted; the temperature gradient of a bath formed by laser beams is utilized, and the hot flow dispersing direction is controlled through a water cooling system, on that basis, small columnar dendrite grains in a fusion covering layer can directionally grow in the axis direction of the liner, and thus the liner of which each part has the directional solidifying structure property can be prepared. The copper conic liner prepared by the method is outstanding in stretching performance in the axis direction, so that the metal jet extending performance can be effectively improved, the jet breakup time can be prolonged, and as a result, the penetration performance can be improved; in addition, the preparation method has the advantages of being short in formation time, high in size accuracy, and high in material utilization rate.

The invention relates to a burr-free punching mold system. The burr-free punching mold system comprises a main punching mold, a back-punching mold, an upper template and a lower template, wherein the main punching mold comprises a first convex die and a first concave die; the back-punching mold comprises a second convex die and a second concave die; the first concave die is fixed on the upper template, and the second concave die is fixed on the lower template; during punching, a punched piece is firmly pressed by both the first concave die and the second concave die; the first convex die penetrates through the second concave die to complete primary punching, and then the second convex die penetrates through the first concave die to finish secondary punching. Compared with the prior art, the burr-free punching mold system has advantages of being wide in application range, low in production cost, high in producing efficiency and the like.

The invention relates to an intelligent textile spray printing machine which comprises a workbench, a conveying device and a spray printing device, the conveying device is arranged in the middle of the workbench, the spray printing device is arranged at the upper end of the middle of the workbench, and the conveying device comprises a rubber plate, a sponge block, a first motor, a large gear, a round roller, a supporting plate, a supporting belt, a small gear, a sleeve and a positioning cylinder. According to the machine, textile fabrics are conveyed through the conveying device, the surface of the supporting belt is cleaned, the fabrics obtained after the completion of spray printing are rolled, textile chippings attached to the textile fabrics are cleaned and collected through the sprayprinting device, the textile fabrics are sensed, and when the fabrics are hollow or made of cotton and linen materials, materials sprayed by a first spray head and a second spray head only make contact with the portions where textile fibers exist so that waste of the materials is prevented, subsequent processing is reduced, and the aesthetic degree of spray printing of the textile fabrics is improved.

The invention discloses a shiitake mushroom crushing device. The shiitake mushroom crushing device comprises a breaking box, a crushing box and a rotary cutter. Shiitake mushroom crushing is divided into a coarse crushing process and a fine crushing process through the breaking box and the crushing box, and firstly, two sets of breaking wheels in the breaking box are used for performing coarse crushing on shiitake mushrooms falling into the breaking box, so that the shiitake mushrooms are changed into smaller shiitake mushroom blocks, so as to reduce subsequent processing, the crushed shiitake mushroom blocks fall into the crushing box, a micro motor drives a rotating shaft to rotate, the rotary cutter rotates to start to cut the shiitake mushroom blocks into powder, and meanwhile, an arc inclined groove is formed in an annular boss, a semi-spherical block is arranged at the upper end of the rotary cutter, and the semi-spherical block moves inside the arc inclined groove, so that the rotary cutter moves up and down in a small range, the crushing efficiency is accelerated, a filter screen is arranged below the rotary cutter, a cam motor in a spring cavity drives a cam to rotate, the filter screen vibrates, the shiitake mushroom powder can be conveniently shaken out of the device, the shiitake mushroom powder is prevented from being accumulated in the device, and it is guaranteed that no large mushroom blocks exist in the shiitake mushroom powder falling into a material receiving box.

The invention discloses a simulation printing method of a nonlinear thin film material. The method comprises the following steps: (1) transfer printing activation: adding an activating agent to enablea transfer printing PVA thin film to enter an activated state; (2) simulation calculation: performing modeling and simulation according to a transfer printing model of a three-dimensional object, andsimulating stretching and deformation processes; (3) acquiring of a pre-deformation pattern: acquiring the transfer printing pre-deformation image according to an analogue simulation result; (4) layer planning: dividing the image into a PVA film carrier layer, a protective layer and a pattern layer according to the requirement of the thin film material; and (5) image-text transfer printing and rolling storage: printing the pre-deformation image and other image layers on the PVA thin film through intaglio printing. Intaglio printing equipment comprises a base, a protective layer printing mechanism, a boundary layer printing mechanism, an image printing mechanism and a winding mechanism. Multi-layer printing is set, one-time coating forming of the image and the protective layer is realized,independent brushing of the protective layer is avoided, boundary layer printing is set, and deformation of the image in the transfer printing process is greatly reduced.

The invention discloses a special-shaped middle ring blank which is characterized in that the designed special-shaped ring blank is composed of a small-hole-end rectangular part, a conical middle part and a large-hole-end rectangular part, and according to the principle that the volume is not changed in the metal plastic deformation process and the structural characteristics of a conical-section ring piece, the special-shaped middle ring blank is manufactured by selecting a proper rolling ratio. Therefore, the structural size of each part of the preformed blank is obtained. According to the structural characteristics of the ring piece, the structural size of each part of a preformed blank is obtained by selecting a proper rolling ratio. The method is simple, the material utilization rate can be effectively increased, the follow-up machining time can be shortened, the completeness of a streamline in the machined ring piece can be kept, the performance of the aero-engine can be improved, and the service life of the aero-engine can be prolonged. The method is suitable for design of the special-shaped intermediate ring blank.