67 results about "Vacuum mixing" patented technology

The invention discloses a high-resilience rubber material and a preparation method thereof, and belongs to the technical field of rubber preparation. The preparation method comprises the following steps: carrying out heat treatment on the raw natural rubber, mixing with the micro-nano spherical hollow powder, carrying out vacuum mixing, mixing the mixed product with the plasticizer and the processing aid, banburying, carrying out open milling on the banburying product, adding the vulcanizing agent, extruding, and finally vulcanizing. The micro-nano spherical hollow powder is introduced in the rubber production process, the targeted preparation method is designed, the high-resilience rubber material is obtained, the resilience performance of rubber is improved, and the preparation method is simple and suitable for industrial production.

The invention provides a scintillator film for a real-time X-ray dosimeter as well as a preparation method and application of the scintillator film. The preparation method comprises the following steps: weighing Eu (NO3) 3.6 H2O, Tb (NO3) 36H2O, Lu (NO3) 36H2O, NaF and NH4F to prepare powder B; preparing a rare earth fluoride material C from the powder B; weighing a polydimethylsiloxane prepolymer and a curing agent, adding the polydimethylsiloxane prepolymer and the curing agent into a cyclohexane solution, and performing ultrasonic dispersion to obtain a mixture D; adding the rare earth fluoride material C and PMMA particles into an ethanol solution, and uniformly dispersing to obtain a mixture E; dropwise adding the mixture E into the stirred mixture D, and performing vacuum mixing to obtain a mixture F; and transferring the mixture F to the surface of a ceramic plate which is respectively cleaned by water, ethanol and acetone and dried, coating to form a thin film, heating and annealing, and cooling to obtain the flexible scintillator thin film NaLuF4: Tb < 3 + > / Eu < 3 + > coated PDMS which is used for a real-time X-ray dosimeter.

The utility model discloses vacuum mixer equipment which comprises a stirring tank main body and a rack, a powder inlet valve is arranged on one side of the bottom of the stirring tank main body, a mixing assembly is arranged in the middle of the bottom of the stirring tank main body, and a discharging valve is arranged on the side, away from the powder inlet valve, of the bottom of the stirring tank main body. A speed reducer is arranged at the top of the stirring tank body, a stirring shaft is arranged at the output end of the speed reducer, cleaning balls are arranged on the two sides of the top of the stirring tank body, a wall scraping stirring assembly is arranged on the outer side of the stirring shaft, and a heating assembly is arranged on the outer side of the stirring tank body. The bottom vacuum powder suction design is adopted, powder enters the stirring tank body from the position below the liquid level, the problem that dust flies in traditional material mixing is solved, meanwhile, the vacuum powder suction greatly relieves the labor intensity of workers, the powder feeding efficiency is improved, and therefore the material mixing efficiency is improved, the partial degassing effect is achieved, and the product flavor is optimized.

The invention provides a preparation method of micron-sized spherical silver-coated copper powder for the electronic industry, and belongs to the technical field of conductive materials.The preparation method comprises the steps that a copper sulfate solution and ethyl alcohol react to obtain a first solution; adding an ammonium oxalate solution into the first solution to obtain slurry; adding a silver nitrate solution and an ammonium oxalate solution into the slurry, and performing stirring, standing and vacuum drying to obtain an oxalate precursor precipitate; mixing the oxalate precursor precipitate with stearic acid, carrying out first vacuum mixing and kneading, adding fumed silica particles, and carrying out second vacuum mixing and kneading to obtain powder; and heating the powder to 135-145 DEG C in a vacuum state, preserving heat for 1.5-2.5 hours, continuously heating to 270-320 DEG C, preserving heat for 1.5-2.5 hours, cooling to room temperature along with a furnace, and carrying out acid pickling, suction filtration, washing, drying and sieving. The micron-sized spherical silver-coated copper powder is high in oxidation resistance, short in process period and high in yield.

The invention discloses a high-melting-point high-temperature lead-free environment-friendly soldering paste and a preparation method thereof. The soldering paste is composed of 85-89% of alloy powder and 11-15% of flux paste. The alloy powder comprises the following components in percentage by weight: 0.5 to 7.0 percent of tin, 0.2 to 3.0 percent of silver, 0.2 to 1.5 percent of copper, 0.5 to 5.0 percent of nickel, 0.02 to 0.8 percent of antimony and the balance of bismuth. A high-boiling-point solvent, modified resin, an active agent containing an antioxidant and a thixotropic agent are adopted in the flux paste, and the flux paste and the alloy powder are prepared into the soldering paste through a vacuum mixing technology. The problem of high-temperature secondary melting of traditional lead-free solder is solved, and the lead-free solder is suitable for high-temperature welding scenes such as ICs and power devices.

The invention relates to the field of food processing equipment, in particular to vacuum mixing equipment for cheese products in process, which comprises a mixer, stirring blades are divided into a first-stage blade, a second-stage blade and a third-stage blade, the second-stage blade and the third-stage blade are telescopically arranged in the first-stage blade along the horizontal direction, and the second-stage blade and the third-stage blade are arranged in the second-stage blade along the horizontal direction. The third-stage blade is telescopically arranged in the second-stage blade in the horizontal direction; the rotating shaft is sleeved with a driving gear in the horizontal direction, the rotating shaft is integrally sleeved with an adapter, the side, close to the rotating shaft, of the adapter is integrally connected with a driven gear, the driven gear is connected with the driving gear in a meshed mode, and a first driving screw is installed on the stirring blades in the horizontal direction; the first driving screw rod sequentially penetrates through the first-stage blade, the second-stage blade and the third-stage blade, and the end part of the first driving screw rod penetrates through the adapter and is connected with the corresponding driven gear. The purpose of the invention is to effectively guarantee the processing quality of cheese products.

The application provides a vacuum mixing process optimization method and system, which comprises collecting mixing container cavity pressure, jacket temperature, material torque, stirring speed, and air extraction flow signal, calculating pressure change rate, torque fluctuation amplitude, air extraction amount per unit time, and pressure fluctuation characteristic quantity, dividing the vacuum mixing process into four stages of initial exhaust, bubble release, viscosity climb, and densification stability; in the initial exhaust section, the vacuum valve opening degree and time length are controlled according to the air extraction amount and the pressure change rate, and the pressure response delay is recorded; in the bubble release section, an air extraction and stop alternating sequence is generated, and the air extraction and stop time length is corrected in combination with the delay; in the viscosity climb section, the target pressure interval is determined according to the torque, temperature, and pressure change rate, and the speed and valve opening degree are cooperatively adjusted to stabilize the pressure; in the densification stability section, a stability criterion is constructed, and the valve opening degree is controlled as needed; when adjacent stages are switched, the target pressure starting point, valve opening degree initial value, speed initial value, and control period of the next stage are corrected according to the end parameters of the previous stage.

The invention discloses a concentric and coaxial vacuum intelligent mixer, which has excellent heat transfer performance, accurate heating constant temperature performance, stable vacuum degree and advanced concentric and coaxial structure, ensures that the positive and negative temperature difference is about 1 DEG C, and ensures that the pressure is not reduced in a vacuum state through the excellent performance of double-end-face mechanical sealing, so that positive and negative rotation is realized while stirring; the materials are mutually impacted and sheared, so that the materials can be fully mixed in a short time. Through cooling of the filter and the condenser, materials lost by transpiration flow back to the recovery tower and are recycled, and the material loss rate is reduced as much as possible. The invention relates to the technical field of vacuum mixing devices.

The invention relates to the technical field of magnetic core manufacturing, and discloses a micro radio frequency conical inductor magnetic core cold press molding process and module device.The micro radio frequency conical inductor magnetic core cold press molding process comprises the following steps that a soft magnetic material is mixed with 3-5 wt% of PVA and 0.2-0.5 wt% of zinc stearate, uniform mixing is conducted through a vacuum mixer to form a uniform mixture, internal air is exhausted, and the density of the uniform mixture is made to be uniform and compact; a magnetic core forming die is adopted and comprises an upper punch, a lower punch and a female die assembly, the upper punch and the lower punch are both made of powder steel, a female die is a piece of hollow special steel, and the evenly-mixed mixture is injected into the female die. According to the method, the axial density deviation of the magnetic core is smaller than or equal to 2% (the traditional uniaxial pressing deviation is usually larger than 5%) through the vacuum mixing and biaxial gradient pressurizing process and in cooperation with a 19.6 + / -0.1-degree taper angle mold. The vacuum material mixing eliminates uneven pores caused by bubbles, the biaxial pressurization enables the powder to be directionally compressed along the taper, the industrial problems of edge looseness and center compactness are solved, and a foundation is laid for low loss (eddy current loss of 0.018-0.022) of the high-frequency inductor.

The invention relates to the technical field of seasonings, and particularly discloses a composite sausage seasoning and a preparation method thereof. The seasoning is prepared from edible salt, isomaltooligosacharide, sodium glutamate, a yeast extract, shiitake mushroom powder, spices, red yeast rice powder, a rosemary extract, nisin, trehalose, curdlan, fermented celery powder, epsilon-polylysine and the like according to a specific ratio. The preparation method comprises the steps of basic raw material mixing, microencapsulation slow-release treatment, stage mixing, spice adding and the like, curdlan is used for embedding the rosemary extract, the slow-release effect is achieved, and a vacuum mixing technology is adopted for ensuring uniformity. The seasoning provided by the invention has synergistic antibacterial and antioxidant properties, can significantly prolong the shelf life of sausages, enhance flavor level and umami strength, maintain salty taste perception while reducing the sodium content, improve the product texture and processing stability, and meet the production requirements of natural and healthy meat products.

The utility model discloses sausage stuffing vacuum stirring device, including the blender, the blender inside rotation is connected with two groups of rotating shafts, the rotating shaft outside rotation is connected with a plurality of groups first rotating link, first rotating link outside fixed connection has the stirring piece, first rotating link one end fixed connection has the connecting gear, the connecting gear one side is connected with the rack, the rack sliding connection is in the rotating shaft outside, the rack one end penetrates the blender fixed connection has the connecting plate, the connecting plate inside screw thread connection has the first screw rod, first screw rod tail and blender rotation is connected, can change the angle of stirring blade according to different types of meat stuffing, can aim at the real -time change of material characteristic in the process of stirring sausage stuffing.

The invention discloses a high-heat-conductivity and high-latent-heat phase change heat conduction material and a manufacturing method thereof. The material comprises the following components in percentage by weight: 5%-8% of resin, 5%-10% of wax, 5%-10% of fatty acid, 0.01%-1% of an antioxidant and the balance of modified heat-conducting powder, wherein the modified heat-conducting powder is obtained by carrying out intercalation treatment on heat-conducting powder by an intercalator and carrying out modification treatment by a silane coupling agent. The preparation method comprises the following steps: carrying out ball milling on heat-conducting powder and an intercalator for intercalation treatment; then reacting with a silane coupling agent to carry out secondary modification; heating and mixing the resin, the wax, the fatty acid and the antioxidant to obtain a liquid mixture; adding modified heat-conducting powder and performing vacuum mixing; after compression molding, cooling and cutting to obtain a finished product. Through a co-processing strategy of intercalation and secondary modification of the silane coupling agent, the problems of easy agglomeration and weak interface bonding of the heat-conducting filler are effectively solved, and the prepared material has high heat conductivity coefficient and high latent heat density, is excellent in cycling stability, and can meet the thermal management requirements of high-end devices such as 5G base stations and new energy automobiles.

The utility model provides a vacuum mixing and emulsifying device for cosmetic production, which comprises an emulsifying tank body, hollow rotating shafts are rotatably connected to two sides of the emulsifying tank body, the inner ends of the hollow rotating shafts are connected with stock solution spray pipes, a plurality of stock solution nozzles are arranged on the stock solution spray pipes, and stirring shaft supporting seats are integrally formed on the hollow rotating shafts close to the side wall of an inner cavity of the emulsifying tank body. And a pair of symmetrically arranged stirring shafts is connected between the two stirring shaft supporting seats. Different cosmetic stock solutions are filled along the two cosmetic stock solution filling guide pipes through the filling equipment, the two different cosmetic stock solutions are sprayed out through the stock solution nozzles arranged on the two stock solution spray pipes, the two different cosmetic stock solutions are oppositely sprayed and mixed, and meanwhile, under the driving of the stirring motor, the two different cosmetic stock solutions are uniformly mixed. The two hollow rotating shafts arranged on the two sides of the emulsifying tank body rotate in a linkage mode through the pair of stirring shafts, the pair of stirring shafts conduct rotating, stirring and emulsifying on the cosmetic stock solution sprayed oppositely in the emulsifying tank body, and the emulsifying efficiency is greatly improved.

This invention discloses a grout color mixing machine, comprising a frame, a vacuum mixing device mounted on the frame, and a dispensing and filling device. The frame includes a table and a first support and a second support mounted on the table. The vacuum mixing device includes a mixing tank, a lifting mechanism mounted on the first support, a mixer driven by the lifting mechanism, and a vacuum pump. The mixer includes a sealing cover, a mixing motor mounted above the sealing cover, and a mixing head mounted below the sealing cover. This grout color mixing machine can thoroughly and evenly mix pre-mixed grout while eliminating air bubbles during the mixing process. It also allows for convenient dispensing and filling of the mixed grout into grout dispensing containers. It has the advantages of reasonable structure, simple operation, high mixing and filling efficiency and quality, and enables grout color mixing and dispensing in locations other than factories, such as retail stores.

The utility model relates to a beef flavor food fragrant Maillard thermal reaction feeding device which comprises a reaction tank and a vacuum mixing tank for feeding the reaction tank, the upper end of the vacuum mixing tank is provided with an enzymatic hydrolysate inlet and a blending agent inlet, the upper end of the vacuum mixing tank is fixedly provided with a vacuumizing pipe communicated with an inner cavity of the vacuum mixing tank, and the lower end of the vacuum mixing tank is fixedly provided with a vacuumizing pipe communicated with the inner cavity of the vacuum mixing tank. The bottom end of the vacuum mixing tank is provided with a prepared material outlet, the prepared material outlet is connected with the reaction tank through a pipeline, the side wall of the vacuum mixing tank is fixedly provided with a connecting frame, the connecting frame is connected with a bracket, and a pressure sensor is arranged between the connecting frame and the bracket. According to the device, vacuum injection is performed in the vacuum mixing tank, so that powder can be prevented from being hung on the wall and hardened; during vacuum material injection, the whole vacuum material mixing tank is weighed, so that the weighing is accurate; the time for injecting and weighing the blending agent is saved, and the efficiency of the whole process is improved; and the blending agent is washed by using the enzymatic hydrolysate, so that the materials are uniformly mixed, and the unsmooth injection of the blending agent and the injection dosage deviation are prevented.

The utility model discloses a beef paste vacuum mixing machine which comprises a first stirring box, two feeding inclined cylinders are symmetrically fixed and arranged on the two sides of the first stirring box in a communicated mode, a cutter is arranged on one side of a valve plate, a movable plate is arranged on one side of the cutter, a plurality of sets of chopping tips are evenly arranged at the lower end of a cross-shaped rotating frame, and the cutting tips are arranged on the lower end of the cross-shaped rotating frame. A vacuum air extractor is arranged on the outer wall of the first stirring box, and a plurality of high-speed chopping rollers are evenly arranged on the inner side of the second stirring box. By means of the structure, three high-speed chopping rollers are evenly arranged on the inner side of the second stirring box, so that beef is chopped and mixed very well and evenly, two electric push rods are symmetrically and fixedly connected to the inner side of a fixing base, a moving plate is fixedly connected to the upper ends of the electric push rods, a second motor is fixedly connected to the upper end of the moving plate, and a third rotating shaft is arranged on one side of the second motor. And one side of the third rotating shaft is fixedly connected with a cutter, so that beef can be cut into small pieces when being put into the cutter, and later chopping and mixing are facilitated.

The utility model discloses a vacuum mixing tank. The vacuum mixing tank comprises a tank body, wherein an inner cavity used for containing materials is formed in the tank body, the tank body rotates around a rotating shaft and is used for being driven to rotate around the rotating shaft, and an included angle is formed between the rotating shaft and the center axis of the tank body. According to the utility model, materials can be fully mixed through rotation of the tank body, so that dead angles of mixing can be avoided, the mixing efficiency can be improved, and the time for fully mixing the materials is saved.

The invention discloses a novel powder-liquid vacuum mixing system which comprises a vacuum mixing tank, a vacuum pump set, a plurality of powder feeding pipelines, a liquid feeding pipeline and a material circulating pipeline, and the powder feeding pipelines are connected with feeding ports formed in the vacuum mixing tank. The liquid feeding pipeline is connected with a liquid inlet formed in the vacuum mixing tank, a weighing sensor is arranged at the bottom of the vacuum mixing tank, one end of the material circulating pipeline is connected with a discharging port formed in the vacuum mixing tank, and the other end of the material circulating pipeline is connected with the heat exchange assembly and the casein conversion tank. The connecting mode of the feeding valve and the vacuum mixing tank is redesigned, the feeding valve is directly welded to the tank wall of the vacuum mixing tank, and the problems that mixing is not uniform, water is stored, and a powder inlet is blocked due to powder moisture are solved; the flow blocking cover and the spoiler are arranged in the vacuum mixing tank, so that liquid can be guided into the shearing head, and self-absorption is realized under the function of spoiler, so that the mixing effect of the material liquid is improved.

The invention relates to the technical field of fluororubber vacuum mixing, in particular to low-temperature fluororubber mixed rubber vacuum mixing processing equipment which is characterized by comprising an overturning support, a cooling sleeve is rotatably mounted on the overturning support, mixing sleeves are mounted at the upper end and the lower end of the cooling sleeve in an inserted mode, and mixing rotating discs are rotatably mounted on the inner walls of the mixing sleeves; a rectangular opening is formed in the upper end of the cooling sleeve, a mixing rotary disc is installed in the rectangular opening, an extrusion mixing mechanism is installed in the rectangular opening of the mixing rotary disc, and a cutting mechanism is installed on the inner wall of the cooling sleeve in a sliding mode. Then the flattened colloid is cut into thin strips through the cutting mechanism, then the mixing turntables in the mixing sleeves at the upper end and the lower end of the cooling sleeve are reversely rotated, and the extruding and mixing mechanism is driven to twist the thin strip colloid into one strand and mix the thin strip colloid, so that the effect of fully stretching and plasticizing the colloid with poor flowability in a low-temperature environment is achieved.

The utility model belongs to the technical field of stirring tank equipment, and discloses a vacuum stirring tank which comprises a base, a first supporting frame and a second supporting frame are fixedly installed on the left side and the right side of the top of the base respectively, and the top of the first supporting frame and the top of the second supporting frame are movably connected with a first movable block and a second movable block respectively. Through the arrangement of the first motor, the rotating shaft, the first long block, the round block and the second long block, an operator starts the first motor to enable the rotating shaft, the first long block and the round block to rotate forwards, and at the moment, the outer surface of the round block can extrude and push the inner surface of the second long block; when the first motor controls the rotating shaft to rotate backwards, the second long block drives the connecting shaft and the stirring tank body to rotate backwards, and the rotation is continuously repeated; and the raw materials in the stirring tank body have a better mixing effect in the stirring process.

The utility model belongs to the technical field of vacuum mixing, and particularly relates to vacuum mixing equipment for producing hydrocortisone acetate, which comprises a bottom plate and a locking plate ring, a back plate is vertically arranged on the rear side of the top of the bottom plate, a mixing barrel is placed on the upper surface of the bottom plate, the inside of the mixing barrel is hollow, and the top of the mixing barrel is open. An inner supporting table is arranged on the upper portion of the interior of the mixing barrel, a sliding groove is vertically formed in the upper portion of the surface of the back plate, a hydraulic cylinder is fixed to the top of the back plate, a sliding block is slidably installed in the sliding groove, and a lower boss is arranged below a top cover of the mixing barrel and can enter the mixing barrel during sealing. And meanwhile, in the downward moving process of the top cover, multiple sliding bolts can be extruded at the same time, so that the sliding bolts move upwards, then multiple movable plates are extruded at the same time, the movable plates rotate, then a pressing ring is pressed downwards, and a sealing rubber ring can be extruded through an arc face at the bottom of the pressing ring, so that the sealing rubber ring deforms outwards.

The utility model discloses an automatic material mixing device which comprises a machine table, a heating feeding box arranged at the end of the machine table and used for feeding candy raw materials and a material mixing box used for conducting vacuum stirring on the candy raw materials, and a feeding copper tube nest communicated with the material mixing box for feeding is arranged in the heating feeding box. After candy raw materials are subjected to vacuum heating and conveyed into the mixing box, a servo motor drives a discharging cleaning scraping plate and a mixing rod to rotate synchronously through a mixing rotating shaft, meanwhile, the vacuum mixing box can enable the stirred and mixed candy raw materials not to generate bubbles through the mixing rod, the candy raw materials are mixed more uniformly, and the mixing efficiency is improved. In addition, a discharging cleaning scraper can scrape and clean entangled candy raw materials generated on the inner wall in time, the problem that the candy raw materials are difficult to clean after being adhered to the inner wall and dried in the discharging process is avoided, and then the mixing box can be washed clean only by being properly washed with clear water after being used.

The application relates to the technical field of composite resin preparation, and discloses a silicon-molybdenum alloy target material preparation method, which comprises the following steps: raw material preparation, selecting molybdenum powder and silicon powder with a purity not less than 99.9%, mixing treatment, placing the raw material into a vacuum mixing machine, vacuumizing to 0.01-0.1 Pa, stirring for 1-5 hours, ultrasonic-assisted oxidation prevention with temperature control at 25-40 DEG C, forming process, loading the mixed powder into a detachable hard alloy mold coated with a 0.05-0.2 mm boron nitride coating, cold-pressing forming, keeping pressure for 5-20 minutes to obtain a green body, sintering process, loading the green body into a vacuum sintering furnace, microwave-assisted heating first, then heating to 1500-1800 DEG C, later controlling the structure by feeding trace argon, post-processing procedure, numerically controlling the sintered target material, chemical cleaning by using a mixed solution of hydrofluoric acid and nitric acid, then plasma treatment, and finally vacuum packaging with high-purity nitrogen. The raw material has high purity and good granularity; the mixture is uniform and oxidation is prevented; the forming and sintering are accurately controlled, the target material quality is guaranteed; the post-processing improves the surface performance, the packaging prevents oxygen and moisture, and the target material meets the needs of high-end industries.

The invention discloses a food-grade silica gel coating of an integrated anti-skid mute coffee cup and a preparation method of the food-grade silica gel coating, and provides a structural design of replacing an additional part with the whole silica gel coating aiming at the problems that a traditional anti-skid rubber ring is easy to fall off and hide dirt. A food-grade double-component addition type silicone rubber formula and a vacuum mixing and low-temperature curing process are adopted, and customized pre-activation treatment of ceramic, glass and plastic base materials is matched, so that high adhesive force of the coating and the base materials is realized; a degradable silica gel modification scheme is introduced, so that the coating has multiple-effect synergistic advantages of skid resistance, silence, food-grade safety, wear resistance, environmental protection and degradability, is adaptive to coffee cup food contact scenes, and is suitable for large-scale production.

The utility model relates to the technical field of water-based paint processing, in particular to a mixing device for water-based paint auxiliary ingredients, which comprises a working table, a mixing tank is arranged on the working table, one side of the mixing tank is connected with a vacuum pipeline, one side of the working table is provided with a gas collecting tank, and the other side of the working table is provided with a gas outlet. The two ends of the vacuum pipeline are communicated with the interiors of the mixing tank body and the gas collection tank. The vacuum pump is used for pumping away gas in the mixing tank body, the gas enters the gas collecting box through the vacuum pipeline to be collected, the vacuum gauge can be used for monitoring the vacuum state in the mixing tank body, and it can be guaranteed that the needed vacuum degree can be reached in the mixing tank body in advance; according to the water-based paint vacuum mixing device, the effect of mixing and stirring water-based paint in a vacuum environment is achieved, dissolution and accumulation of gas in liquid in the mixing process are reduced, generation of bubbles is reduced, meanwhile, interaction between the water-based paint is promoted through vacuum mixing, the separation phenomenon between components is reduced, and mixing uniformity and stability are improved.

The utility model relates to the technical field of coffee machines, in particular to a vacuum coffee machine, a coffee bean quantifying structure of the coffee machine, a vacuum mixing structure, a sealing structure of the vacuum coffee machine and a coffee making method based on the vacuum coffee machine. The vacuum mixing structure comprises a processing structure, the processing structure comprises an integrated container, a blade assembly, a sealing and fixing cover and a rotating power device, the sealing and fixing cover completely shields an opening in the top end of the integrated container, and the integrated container is provided with a heating device, a rotating shaft hole, a water inlet, an air exhaust hole and a bottom outlet. According to the utility model, coffee beans and the like are ground, heated and extracted in a unique sealed space, and the opportunity that coffee powder is transferred among different units and is in contact with oxygen in air is avoided or reduced, so that the oxidation effect can be minimized, and the storage of volatile grease, antioxidants and enzymes in the coffee powder and the like can be maximized.

The invention belongs to the technical field of high polymer materials, and relates to a flame-retardant epoxy resin casting material and a preparation method thereof. The invention provides a preparation method of a flame-retardant epoxy resin casting material, which comprises the following steps: dissolving dimethyl polysiloxane in a lipophilic solvent, then dropwise adding onto aluminum oxide powder while stirring, and heating in a nitrogen atmosphere to obtain PDMS (Polydimethylsiloxane) modified aluminum oxide; mixing epoxy resin and silica powder in vacuum to obtain a resin mixture; mixing silane coupling agent modified DOPO, the PDMS modified aluminum oxide and an anhydride curing agent in vacuum to prepare a curing agent mixture; and performing vacuum mixing on the resin mixture and the curing agent mixture to obtain the castable. The PDMS modified aluminum oxide and the silane coupling agent modified DOPO are adopted, so that the electrical performance and the mechanical performance of the flame-retardant epoxy resin casting material are synergistically improved.

The invention discloses a whisker-reinforced high-temperature-resistant and acid-corrosion-resistant artificial stone and a preparation method thereof. The artificial stone is prepared from 65-90% of anhydrous calcium sulfate whiskers, 10-35% of unsaturated resin and a curing agent, and is characterized in that the whiskers are roasted at 620-650 DEG C, the length-diameter ratio is 5-40, and the proportion of the whiskers with the length of 150-300 microns is larger than or equal to 90%. According to the preparation method, sectional vacuum mixing and a specific two-stage vacuum vibration exhaust process are adopted, and a step heating curing procedure is matched, so that the final product simultaneously meets the following conditions: (a) after heating for 2 hours at 250 DEG C, the bending strength is greater than or equal to 40 MPa, and the strength retention rate is greater than or equal to 95%; (b) no blackspot exists on the surface after being contacted with 50% sulfuric acid for 24 hours; and (c) the deformation rate of the base material is less than or equal to 0.03 mm / m when the heat transfer printing process at the temperature of 200-230 DEG C is adapted. The product is particularly suitable for the field of high-end heat transfer printing decoration, the excellent effects that the adhesive force is larger than or equal to 5.0 MPa and the pattern resolution is larger than or equal to 400 dpi can be achieved under the technological conditions that the temperature is 190-230 DEG C and the pressure is 0.5-0.8 MPa, and the technical problem that traditional artificial stone cannot tolerate the high-temperature processing environment is solved.

The utility model relates to the technical field of vacuum mixing, in particular to a multi-component constant-proportion vacuum mixing device which comprises a stirring barrel, two feed ports are formed in the top of the stirring barrel, a discharge port is formed in the bottom of the stirring barrel, two storage barrels are fixedly mounted at the top of the stirring barrel, discharge pipes are fixedly connected to the bottoms of the storage barrels, and the discharge pipes are fixedly connected to the bottom of the stirring barrel. A feeding mechanism is mounted between the stirring barrel and the two storage barrels, the feeding mechanism is communicated with the discharging pipe and the feeding opening, and a stirring assembly is mounted in the stirring barrel; the feeding mechanism is fixedly provided with two sealing mounting cylinders, a first piston, a second piston, a push rod, a first baffle, a second baffle and a spring, and the two sealing mounting cylinders are fixedly connected to the top of the stirring barrel. According to the utility model, the problems that the glue discharging ratio of A and B materials is imbalanced and the performance of the mixed insulating glue is poor due to the aperture change caused by residual glue of the glue discharging nozzle are effectively solved.

The utility model discloses a paraffin phase change material vacuum mixing and stirring tank, which comprises a tank body and a preheating mechanism, the upper end of the tank body is fixedly connected with a support frame, the upper end of the tank body is rotatably provided with an end cover, the upper end of the support frame is provided with a motor, and the motor is connected with the preheating mechanism. An output shaft of the motor is fixedly connected with a transmission shaft, the transmission shaft is connected with a rotating shaft through a first synchronous belt, the lower end of the rotating shaft is fixedly connected with a stirring rod, and the lower end of the tank body is fixedly connected with a discharging port. Stirring and preheating are synchronously carried out, an additional power source is not needed, and the working efficiency is improved.