115results about How to "Conducive to solidification" patented technology

A compound mold or tooling system is designed to provide an alternative to conventional, expensive, metal molds for various plastics molding applications. The compound mold comprises a replaceable thin-walled liner, or skin-mold, defining the mold surface, temporarily bonded by vacuum means or mechanical means to a conforming backing-mold mold body supported by a rigid backing-plate. Both skin- and backing-molds are composed of suitable polymers with or without additives, fillers, reinforcements or other inclusions depending on mold requirements. The backing-plate contains standard features and fixtures common to all molds used in the particular process or of a particular geometry.

The invention relates to a production technology of viscose extinction monofilament. The production technology takes cellulosic fiber pulp as a raw material and obtains viscose extinction monofilament through preparation of a spinning solution, injection before spinning, spinning and aftertreatment, and specifically comprises the following steps of: (A) preparing the spinning solution from the cellulosic fiber pulp through steeping, ageing, yellowing, dissolving, defoaming and filtering; (B) adding a titanium dioxide solution into the spinning solution so that the weight ratio of titanium dioxide to alpha cellulose content in the spinning solution reaches (0.5-5.0):100; and uniformly mixing and feeding for spinning; (C) feeding the spinning solution into a spinning machine, and enabling the spinning solution to pass through a spinneret orifice of a single-hole spray head under pressure, and solidifying and molding the formed viscose trickle to form raw silk strips, wherein the spray head is stretched by +60% to +80%, and an inlet channel of the spinneret orifice is in a parabola shape; and (D) performing aftertreatment: performing desulfurization, bleaching, oiling and drying on the raw silk strips to obtain the viscose flat monofilament. According to the production technology provided by the invention, the filament number of the prepared viscose monofilament is 50-6,000D, the strength is high over 75CN, and the requirements on dyeing, weaving and finished product taking are met; and moreover, the viscose extinction monofilament has gentle color and an extinction effect.

The invention discloses a double-component silane-terminated seal adhesive which comprises a component A and a component B, wherein the component A is prepared from silane-terminated prepolymer, plasticizer, thixotropic agent, ultraviolet absorbent, ultraviolet stabilizer, moisture remover, accelerator, curing agent, colorant, bulking filler and reinforcing filler; the component B is prepared from silane-terminated prepolymer, plasticizer, cocatalyst, surfactant and water absorbent; and the component A and the component B are mixed in a weight ratio of 5:1-49:1. In the invention, the proportioning range of the double-component system is more flexible, and the consumption of the component B is flexible and low, so that the properties of the double-component system are closer to and even superior to those of the single component A in the curing process after reducing the A\B mixture.

The invention relates to a power transmission cable with an anti-icing function. The power transmission cable sequentially comprises a power transmission cable inner core, an insulating layer sleeving the outside of the power transmission cable inner core, a cable shielding layer sleeving the outside of the insulating layer, and a cable sheath layer sleeving the outside of the cable shielding layer from inside to outside, wherein the power transmission cable is characterized in that an anti-icing function layer is also arranged in the middle of the insulating layer and the cable shielding layer and comprises an inner-layer high-temperature composite phase change material layer and an outer-layer low-temperature phase change material layer. The power transmission cable is reasonable in structure design and various parts are tightly combined and mutually isolated and insulated. In cold weather, the inner-layer high-temperature composite phase change material layer is capable of retarding heat escape and preventing overheat ageing of an outer-layer material; and the outer-layer low-temperature phase change material layer is capable of keeping the outer surface of the cable in a relatively low temperature state, preventing snow melting and icing, caused by heating of the inner core, of the outer surface of the power transmission cable, preventing cold shortness of the cable material and prolonging the life of the cable protection layer and the insulating layer.

The invention discloses a method for improving arc additive manufacturing precision and forming efficiency of a wire material and belongs to the technical field of advanced manufacturing. The problemsthat during arc additive manufacturing of a conventional wire material, the size precision and the surface quality of samples are poor, the heat inputting is limited, and the forming efficiency is not high are solved. According to the method, the relative positions of a forming mold and a welding gun are fixed, the mold forming face in the forming process is made to keep being in contact with theside face of a molten pool, the shape of the molten pool is restrained, the molten pool is made to be solidified under the mold restraint, micro casting of metal of the molten pool is achieved, and the consistency of the welding bead width and stable process parameters are guaranteed in the forming process, so that the size precision and the surface quality of the formed samples can be improved;and by means of water cooling on the mold, cooling on the molten pool is enhanced, changing of the cooling conditions is reduced, and the uniformity of the performance of the structures of the samplesis guaranteed. On the other hand, because the mold is adopted to restrain the metal of the molten pool, the linear energy can be increased, it is not needed to worry that because of free flowing of the molten pool, forming cannot be achieved, and therefore the forming efficiency is improved.

The invention relates to a square-wave pulse generator, and in particular relates to an all-solid-state square-wave pulse generator based on a fractional ratio saturable pulse transformer and a Marx generator, and belongs to the field of pulse power. The pulse generator is composed of a charging module, a pulse boosting module and a load module. According to the pulse generator provided by the invention, the primary working voltage and an auxiliary side saturable inductor of the pulse transformer can be reduced, and compact integration of the pulse transformer and the magnetic switch can be achieved; the magnetic switch is used for replacing an air switch in the traditional Marx generator, so that the service life of the whole system and the repeat frequency are greatly enhanced; a high voltage silicon rectifier stack is used for replacing an isolated inductor in the Marx generator, and the pre-pulse problem is effectively eliminated; meanwhile quasi-square-wave pulse with relatively high quality and good flattening degree can be output via an anti-resonant network, the system is all solidified and miniaturized, and is small in volume, light in weight, convenient in transport and practicability, avoids a multi-switch serial structure of the high voltage pulse generator, and can improve the service life.

The invention provides a cyanate resin composition comprising at least one 70-90wt% of cyanate or cyanate prepolymer, 30-10wt% of epoxy resin and 100-500ppm of catalyst. In addition, the invention provides a high modulus carbon fiber prepreg which is prepared by soaking the carbon fiber in the cyanate resin composition without solvent, the prepreg has good operability and long-life property at room temperature, and the mechanical property of the cyanate/high modulus carbon fiber composite material which is through the hot-press forming with a press or through the autoclave forming is greatly increased compared with that of the corresponding epoxy/high modulus carbon fiber.

The invention discloses a fast cured moist-heat aging resistant double-component sealing adhesive consisting of components A and B and a preparation process thereof. The component A comprises silane-containing blocking prepolymer, plasticizer, thixotropic agent, ultraviolet absorbent, ultraviolet stabilizer, moisture scavenging agent which is easily hydrolyzed silane coupling agent or oxazolidine moisture scavenging agent, accelerant, curing agent, colorant, incremental filler which is superfine calcium carbonate, superfine talcpowder, surface treated calcium carbonate or silicon micro powder, and reinforcing filler; and the component B comprises silane-containing blocking prepolymer, plasticizer, thixotropic agent, cocatalyst, surfactant and water absorbent material. The weight ratio range of the component A and the component B of the double-component system is relatively wide, and certain mixing error and metering error are allowed during mixing. Moreover, the mixing quantity of the component B is relatively low, the performance of the component B is furthest kept equivalent to that when the component B and the component A are separately cured, and the adhesive influence is reduced to minimum.

The invention provides an adhesive perovskite manganese oxide material. The adhesive perovskite manganese oxide material is prepared by adopting the following method: preparing precursor powder: La2O3, CaCO3 or SrCO3 or Pr6O11 or Co2O3, MnO2 are mixed according to the atomic ratio of La1-xMxMnO3, thereinto, La<1-x>MxMnO3, x is more than 0 but less than 1 and M is either Sr, Ca, Pr or Co; after the raw materials are milled, the milled materials are calcined at the temperature of 1100 to 1300 DEG C for 5 to 20 hours twice to three times before the calcined materials are milled again; b. packaging a coupling agent: the coupling agent of 0.5 to 1.5 percent of the precursor powder by weight is added to the precursor powder and is beaten uniformly; c. adhesion: an adhesive agent of 1 to 6 percent of the precursor powder by weight and a curing agent corresponding to the adhesive agent are dissolved in acetone; subsequently, the precursor powder in the step b is added; the mixture is mixed uniformly and baked before the mixture is pressed under the pressure of 10 to 800MPa. The adhesive perovskite manganese oxide material has good mechanical property and is tough to some extent, which is unbreakable. The adhesive perovskite manganese oxide material can be manufactured into components of various complicated shapes.

The invention relates to novel room-temperature vulcanized silicon rubber and a cross-linking agent thereof, and discloses application of a phosphonitrilic chloride trimer modifier and a hydrolytic condensation product of the phosphonitrilic chloride trimer modifier as a cross-linking agent in the room-temperature vulcanized silicon rubber. The phosphonitrilic chloride trimer modifier and the hydrolytic condensation product of the phosphonitrilic chloride trimer modifier comprise siloxane structures and phosphonitrile groups, wherein the weight ratio of siloxane groups to phosphonitrile groups is 100:(10-60) along with different hydrolytic condensation degrees of the phosphonitrilic chloride trimer modifier and the hydrolytic condensation product of the phosphonitrilic chloride trimer modifier. The novel room-temperature vulcanized silicon rubber provided by the invention is stable in property, the use environment of the novel room-temperature vulcanized silicon rubber is widened, particularly compared with a similar product, prepared flame-retardant silicon rubber is good in mechanical property, and the mechanical strength of a product can be well improved; the prepared silicon rubber is good in flame retardancy, and the limit oxygen index of the silicon rubber is increased.

The invention relates to a preparation method of non temperature-sensibility manganese oxide magneto-resistor material, the specific steps are as follows: a. La2O3, SrCO3 and MnO2 are prepared according to atomic ratio of La0.7Sr0.3MnO3, the raw material is ground, three-time calcination and the grinding after calcination are carried out to obtain precursor powder; b. 5-15 percent of metal tin powder is added in the precursor powder to obtain mixed powder; c. the mixed powder is mixed with coupling agents of which the weight is 1 percent of the precursor powder; d. binding material which is 4 percent of the precursor powder by weight and curing agents are sequentially dissolved in acetone, the mixed powder is added, evenly mixed and then the mixture is dried and is formed by pressing at 100-800MPa, and is solidified at 120-160 DEG C. The preparation method has simple preparation process, low energy consumption and low cost, and the prepared manganese oxide magneto-resistor material has high magneto-electricity resistance in the wide temperature range and downfield, and the magneto-electricity resistance is insensitive to the temperature.

The embodiment of the invention provides a welding method and device of copper and a copper alloy material. The method comprises the steps that through a main waveband laser device, main waveband laser is output; through a second waveband laser device, second waveband laser is output; through a laser adapter, composite laser is output, the composite laser carries out welding on the area to be welded, the composite laser comprises the main waveband laser and the second waveband laser which are coaxial, and the absorbing rate of the area to be welded for the main waveband laser is larger than the absorbing rate of the area to be welded for the second waveband laser. The energy use rate of the laser beam is improved, under the same laser power level, the higher-speed welding can be achieved,due to the high-speed welding, condensing forming of copper and copper alloy can be facilitated, the composite welding method is used for achieving high-speed stable welding of the copper and the copper alloy, and welding line forming and welding line quality can be ensured.

The invention provides double-component water-swelling cement gum, which is composed of a component A and a component B. The component A comprises the following raw materials: polyether polyol, isocyanate, surface hydroxyl modified paraffin, epoxy resin, an epoxy diluent, a thickener and a solid filler. The component B is prepared from the following raw materials: polyether polyol, water-absorbentresin, a catalyst, a chain extender, surface hydroxyl modified paraffin, a thickener and a solid filler; wherein the solid filler comprises bentonite modified by a silane coupling agent. According tothe invention, paraffin with certain hydroxyl on the surface is introduced into the two components, so that certain surface lubricity is provided, and a product does not stick to hands of operators during kneading; good weather resistance is realized in various environments. The water-absorbent resin and the silane coupling agent modified bentonite synergistically play a role, so that the bondingstrength between the cement gum and a wall surface is enhanced, and a three-dimensional waterproof sealing effect is formed on a bonding interface, and waterproof and moistureproof effects are betterfacilitated.

The invention discloses a micro-strip filter 3D printing manufacturing method. The method comprises the following steps: S1, designing a substrate printing pattern and a metal circuit printing patternaccording to a circuit pattern of a micro-strip filter; S2, extruding low-temperature co-fired ceramic slurry serving as a printing material out of a nozzle and depositing the slurry on a workbench to form a low-temperature co-fired ceramic substrate by using a 3D printer according to the substrate printing pattern; S3, curing the low-temperature co-fired ceramic substrate on the workbench in aninfrared heating mode; S4, spray-printing nano-silver metal ink serving as a printing material on the surface of the cured low-temperature co-fired ceramic substrate to form a metal circuit by using the 3D printer according to the metal circuit printing pattern; and S5, sintering the low-temperature co-fired ceramic substrate printed with the metal circuit by using a vacuum sintering furnace. Themethod is simple and easy to master, the production cost can be reduced, and a solution is provided for rapid manufacturing and individuation of the micro-strip filter.

A selective laser melting method of blocky ternary eutectic oxide ceramic adopts a CO2 laser selective melting method, the scanning rate and the laser power of the CO2 laser selective melting method are controlled within ranges shown in the specification, and a melt material in a laser scanning area obtains higher supercooling degree, the nucleation rate is increased, so that the eutectic structure is refined, and the mechanical properties of a sample is improved. The large-size blocky Al2O3-GdAlO3-ZrO2 eutectic ceramic is obtained through preparation, and the size of the prepared Al2O3-GdAlO3-ZrO2 eutectic ceramic reaches 20*18*3.5 mm<3> after the Al2O3-GdAlO3-ZrO2 eutectic ceramic is subjected to linear cutting. The scanning rate can reach 5000 mm/s at most, the energy absorption rate ofthe ceramic material to a CO2 laser is high, and complete melting and solidification forming of the oxide ceramic material are better facilitated. Meanwhile, a laser beam selectively melts and solidifies a powder layer according to a path and parameters set by a computer, layer-by-layer stacking is carried out, and a solidified eutectic ceramic sample with a large size and a complex shape can beprepared.

The invention discloses fermented bean curd and a making method thereof. The fermented bean curd is made from raw materials including, by weight, 100-160 parts of soybeans, 10-16 parts of wine, 7-11.2 parts of table salt, 5-8 parts of pepper, 2-3 parts of spice, 40-64 part of soup, 400-640 parts of water and 0.6-0.96 part of gypsum water via process of raw material selecting, washing, pulping, boiling, solidifying, forming, fermenting, pickling and the like. The fermented bean curd is healthy and delicious, special in taste, safe without additives, easy to take and long in shelf life.

The invention discloses a nanoimprint machine and a pressurizing method thereof. The nanoimprint machine comprises a vacuum chamber, a drive unit, a pressurizing disc, a bearing platform and a curing forming device, the bearing platform is arranged at the bottom in the vacuum chamber, the pressurizing disc is arranged above the bearing platform in the vacuum chamber and is connected with the drive unit, the drive unit comprises a direct-driven servo electric cylinder composed of a servo motor and a ball screw, a high-sensitivity pressure sensor is arranged in the cylinder body of the servo electric cylinder, the pressurizing disc comprises an upper pressurizing disc and a lower pressurizing disc, the upper pressurizing disc is connected with the ball screw, rolling friction balls are arranged between the upper pressurizing disc and the lower pressurizing disc, the bearing platform is provided with a heater, and the bottom of the bearing platform is provided with an ultraviolet light source. The nanoimprint machine has the advantages of uniform pressure distribution, self control and arrangement of an imprint pressure, a dwelling time and an imprint speed, and suitableness for the thermocuring formation and ultraviolet curing formation.

The invention discloses a vacuum circuit chip packaging mould. The vacuum circuit chip packaging mould is characterized in that the vacuum circuit chip packaging mould comprises a lower mould(1) and an upper mould (2), the lower mould (1) comprises a plurality of platforms (3) and a mold cavity (4), wherein the platforms are horizontally arranged at intervals, the mold cavity (4) is used for placing electron components, feeding grooves (5) and residual material discharging grooves (6) are correspondingly formed in the two ends of the platforms (3) and the mold cavity (4), feeding holes (7) areformed in the connecting ends of the mold cavity (4) and the feeding grooves (5), and discharging holes (8) are formed in the connecting ends of the mold cavity (4) and the residual material discharging grooves (6); and vacuum holes (10) are formed in the bottom ends of the residual material discharging grooves (6), and the vacuum holes (10) are connected with a vacuum pump (11). According to thevacuum circuit chip packaging mould, the degassing effect is great, and the vacuum circuit chip packaging mould is particularly suitable for degassing and packaging of packaging materials with largestickiness and bad mobility.