46results about How to "Improve density uniformity" patented technology

The invention discloses binder spraying 3D printing equipment and a printing method for low-fluidity powder, and relates to the technical field of 3D printing. The printing method comprises the steps that the powder forming module is controlled to reach an initial position; the powder forming module comprises a powder falling module and a powder spreading module which move synchronously; powder is added into the powder falling module through the powder supplementing module; the powder forming module is moved to the initial powder laying position, and powder is controlled to be scattered on a vibration plate from a powder supplementing bearing plate of the powder falling module; vibration of a vibration plate is controlled, so that the powder is transferred to the front of the powder spreading module and is spread and compacted; laying of single-layer powder is completed; the steps are repeated to complete laying of the bottom powder layer; and laying of the slice layers is completed repeatedly on the bottom powder layer, the ink jetting module is controlled to move along with the powder forming module, a binder is jetted to each slice layer, and a 3D printing product is obtained through curing. A matching scheme of layer-by-layer powder supply, independent powder spreading and independent compaction is adopted, so that high density and high uniformity of a low-fluidity powder printing breadth are ensured.

The invention discloses high-density ultra-thin electronic-grade glass fiber cloth, and relates to the technical field of glass fiber cloth preparation, the high-density ultra-thin electronic-grade glass fiber cloth is formed by weaving warp yarns and weft yarns with the monofilament diameter of 4.0 microns, the warp and weft density is 90-100 pieces / inch, an air jet loom is combined with an auxiliary air jet mechanism for plain weaving, and it is guaranteed that fibers are tightly arranged; the preparation method comprises the steps of low-speed warping, weaving, desizing, deep splitting, cleaning and surface treatment. During weaving, through low-tension control and low-pressure airflow assistance, the fabric structure is more compact and uniform; a three-step method is adopted to gradually eliminate most slurry, and the slurry is further removed through liquefaction desizing; splitting and cleaning adopt a water flow and air flow combined mode, so that fiber opening is ensured, and the slurry residue rate is reduced to the minimum; finally, the strength of the high-density ultrathin electronic-grade glass fiber cloth is improved through treatment of a silane coupling agent; and low-tension and extremely low-slurry-residue-rate weaving of the high-density ultrathin electronic-grade glass fiber cloth is realized.

The invention relates to a variable-thickness integral control surface prefabricated body forming method and a mold, belongs to the technical field of control surface prefabricated body forming, and solves the technical problems of long forming preparation period and local layering of a control surface prefabricated body. Cutting cloth according to the size of the prefabricated body division area; preparing a lower layer-by-layer staggered triangular filling area prefabricated body, and preparing an upper layer-by-layer staggered triangular filling area prefabricated body; fixing the prefabricated body, and sewing; the upper die assembly and the lower die assembly are used for replacing the lower sewing tool and the upper sewing tool; and the upper mold assembly and the lower mold assembly are closed through a pressing strip, and the thickness-variable overall control surface prefabricated body is fixed. The method is used for forming the variable-thickness integral control surface preform.

The utility model relates to an on-line boxing density detection device for threshed and redried finished tobacco strips, which is mounted on a main pressure head of a packer and comprises a mounting seat, a pressure sensor and a sealing protective cover. And the pressure sensors are uniformly distributed on the bottom surface of the mounting seat. According to the device, the pressure values of multiple position points of each box of tobacco leaves are measured, and the density distribution condition of tobacco bales can be obtained according to the pressure values, so that data support is provided for improving the boxing density uniformity.

The invention provides a door and window frame joint mixture stirring type preparation device and a joint mixture preparation method.The door and window frame joint mixture stirring type preparation device comprises two stirring and dispersing devices, each stirring and dispersing device comprises a stirring barrel, a driving mechanism, an inner stirring rod and an outer stirring rod, scrapers are arranged on the two sides and the bottom side of each outer stirring rod, and the scrapers make contact with the inner walls of the stirring barrels; the rotating directions of the inner stirring rod and the outer stirring rod are opposite, a heating plate is arranged at the bottom of the stirring barrel, a discharging pipe is further arranged on the lower portion of the side face of the stirring barrel, the discharging end of the discharging pipe is connected with a hydraulic filling machine, and the discharging ends of the two hydraulic filling machines are connected with a stirring machine and controlled by a controller. According to the intelligent automatic stirring type preparation device for the door and window frame joint mixture, traditional reaction kettle processing is replaced, the processing efficiency is high, the dispersion effect of the mixture is improved, uniform stirring is ensured, the prepared joint mixture is high in strength and good in heat preservation effect, the sagging phenomenon is not prone to occurring during construction, and the service life of the joint mixture is prolonged. Good fixation with the door and window frame is ensured, and moisture permeation is effectively prevented.

This invention relates to the field of thermal insulation materials, specifically to an inorganic silicon crystal fire-resistant thermal insulation material for fireproof air ducts and its preparation method. The material comprises inorganic silicon crystal powder, hollow microspheres, composite binders, reinforcing fibers, surface modifiers, nano-antibacterial agents, crack-resistant agents, flame-retardant synergists, and intumescent flame-retardant microcapsules. The inorganic silicon crystal powder is activated by calcination, the microspheres are pretreated with coupling agents and coated with silica sol, the binder is a compound type, the fibers are grafted, the antibacterial agent is loaded onto a carrier, and the flame-retardant microcapsules have a specific core and shell. All components work synergistically to ensure performance. This invention improves the material's fire resistance, thermal insulation, and mechanical properties, integrates antibacterial and flame-retardant functions, optimizes the process to ensure stable performance, reduces fire risk, and meets the high-performance and high-stability requirements of high-end building fireproof air ducts.

The utility model relates to the technical field of powder forming equipment, and discloses a transverse powder forming machine which comprises a machine frame used for installing and supporting mechanical parts. The upper punching device is installed on the rack and used for pressing and forming powder. The workbench is arranged between the upper punching device and the lower punching device; the transverse pressing devices are installed on the workbench, the transverse pressing devices are oppositely arranged, and each transverse pressing device comprises a linear driving piece and a forming block; the forming blocks are driven by the linear driving piece to be spliced to form a cavity used for containing powder. The control system is used for receiving signals and outputting the signals. According to the utility model, multidirectional cooperative pressing is adopted, high-precision forming control is realized, and the adaptability is strong.

The invention relates to the technical field of spraying, in particular to an in-greenhouse spraying device which comprises a spraying mechanism, a moving mechanism is connected to the spraying mechanism, a solution preparation mechanism is connected to the moving mechanism, a guide rail mechanism is further connected to the moving mechanism, a power device is arranged in the moving mechanism, and a rotating device is meshed with the power device. The rotating device is meshed with a moving device, and the power device is connected with a stirring device in the solution preparation mechanism. The power device drives the rotating device to rotate, the rotating device rotates to drive the moving device to move up and down, the moving device moves up and down to complete up-down movement of the spraying mechanism, and the spraying mechanism moves up and down to complete full-coverage spraying on planted crops. The stirring device is driven in the moving process of the moving mechanism, and the stirring device is used for stirring the sprayed solution, so that the density uniformity of the sprayed solution of the planted crops is achieved.

The application discloses a kind of solid waste material compression molding equipment before test, it is related to solid waste compression technology field, including main body, the front of main body is sequentially provided with upper die punch, female die and lower die punch from top to bottom, the upper die punch and lower die punch can be slidably matched in the cavity of female die, feeding unit is arranged between the main body and the upper die punch, and the discharge end of the feeding unit is arranged in the upper die punch.The application makes the female die in the compression process in floating state, when the upper die punch is pressed down, the friction between the powder and the inner wall of female die can drive the female die to descend synchronously, the floating effect makes the lower die punch relatively enter the female die cavity deeper position and generate reverse pressure, significantly improve the density uniformity of briquetting in vertical direction.

The utility model discloses a kind of waste washing machine metal shell compression devices, the device includes base, the base is provided with compression box, compression box is a side or the square box of opposite pair of side open, multiple compression mechanism is set in compression box, multiple compression mechanism includes transverse compression component and longitudinal compression component, transverse compression component has symmetric distribution two groups, respectively set in the two sides of adjacent side of compression box opening side, longitudinal compression component is set in the upper portion of compression box, transverse compression component includes transverse extrusion plate and the transverse hydraulic cylinder of being set in the rear of transverse extrusion plate, longitudinal compression component includes downward extrusion longitudinal extrusion plate and the longitudinal hydraulic cylinder of being set in the above of longitudinal extrusion plate.The utility model is compressed to waste washing machine metal shell by transverse, longitudinal and rotation three directions simultaneously, compression efficiency is high, the density of compressed metal square is uniform, metal recovery rate is high, easy to operate, effect is remarkable.

The invention relates to the technical field of precious metal metallurgy, and discloses a high-density iridium ingot sedimentation type smelting process which comprises the following steps: preparing a water-cooled copper crucible with a zirconium oxide inner wall coating; iridium powder and calcium oxide powder are mixed and put into a crucible; performing induction heating in a vacuum environment until the raw materials are molten; protective gas is inflated, periodic variable-pressure oscillation operation is applied under the condition that the temperature of the melt is kept, and slag crust on the surface of the melt is destroyed through pressure fluctuation and deep gas is promoted to be exhausted; after oscillation is stopped, the melt is left to stand, and a slag system floats upwards and is separated; and establishing a bottom-to-top temperature gradient to control directional solidification of the melt. According to the invention, oxide hard shells are destroyed through a variable-pressure oscillation mechanism, and efficient degassing and impurity removal are realized by cooperating with calcium oxide slagging; the zirconia coating effectively prevents the crucible material from being polluted; the directional solidification and hot isostatic pressing process eliminates internal shrinkage cavities and looseness. According to the process, the impurity content in the iridium ingot is remarkably reduced, and the purity and compactness of the material are improved.

The utility model belongs to the technical field of building construction, and discloses a concrete fixing frame for building construction, which comprises a base, a bottom plate arranged above the base, a support frame rotationally connected to the upper side of the bottom plate, a first side plate and a second side plate rotationally connected to the outer side of the support frame, and an auxiliary slicking mechanism for slicking concrete, the auxiliary slicking mechanism comprises L-shaped fixing blocks arranged at the corners of the supporting frame, vertically-upward fixing stand columns are arranged at the corners of the top ends of the fixing blocks, guide sliding rods are arranged between the two fixing stand columns on the same side, and the number of the guide sliding rods is two. The auxiliary slicking mechanism is arranged at the top of the supporting frame, the push-pull handle is manually pushed and pulled, the push-pull handle drives the movable connecting plate to move along the guide sliding rod through the rotating shaft, the movable connecting plate drives the slicking plate to move, poured concrete can be primarily slicked, the workload of follow-up manual leveling is reduced, and the working efficiency is improved. And the quality of the concrete surface is improved.

This invention relates to a large-size, high-density, high-carbon, high-silicon hot-rolled round steel bar and its preparation method. The chemical composition of the hot-rolled round steel bar, by weight percentage, includes: C: 0.60%~0.70%, Si: 1.70%~1.95%, Mn: 0.80%~0.90%, P≤0.015%, S≤0.015%, Cr: 0.80%~0.90%, Ni: 0.20%~0.25%, Mo: 0.05%~0. 0.10%, Al: 0.015%~0.035%, N: 0.0045%~0.010%, with the remainder being Fe and unavoidable impurities; it can balance toughness and wear resistance, and under the high carbon, high silicon, and high chromium composition system, it can effectively improve the internal density of hot-rolled round steel with a maximum φ110mm specification, meet the stringent flaw detection requirements of equivalent "≤φ1.3", and is suitable for the high-strength and high-wear working conditions of coarse copper ore grinding balls.

The pre-pressing structure for the heavy hydraulic machine comprises a pre-pressing plate and a lower pressing plate, the two sides of the pre-pressing plate are both fixedly connected with limiting sleeves, lubricating sliding sleeve structures are installed in the limiting sleeves, the lower pressing plate is arranged above the pre-pressing plate, a mold groove is formed in the bottom end of the pre-pressing plate, and the lower pressing plate is connected with the mold groove. Pressing structures are hinged to the two sides of the bottom end of the lower pressing plate, each pressing structure comprises a push rod, a hinge seat, a sliding seat, a guide seat, a sliding rod and a disc spring, and the push rods are hinged to the two sides of the bottom end of the lower pressing plate. When the hydraulic machine drives the lower pressing plate to press downwards, the plurality of push rods at the bottom of the lower pressing plate disperse the downward pressure of the hydraulic machine to the plurality of push rods, so that the pressing force is dispersed, and the density is more uniform after a blank is formed; furthermore, when the structure is pre-pressed, the sliding seat is compressed towards the disc-shaped spring along the sliding rod due to pressure, at the moment, the disc-shaped spring is compressed to store elastic potential energy, and kinetic energy compensation is carried out on looseness of all parts.

The utility model relates to the technical field of pipe processing, provide a kind of pipe rapid forming device, including upper die and lower die, the upper die is shaped multiple shaping cavities after cooperation with the lower die, blanking tube is communicated with the injection slot on the lower die, the branch material groove of the injection slot is one-to-one corresponding with the shaping cavity, the lower die includes two rows of lower shaping groove, the injection slot and the branch material groove are respectively arranged in first plane and second plane mutually into preset angle, two rows of the lower shaping groove are arranged in the second plane.The utility model optimizes the structure of existing pipe processing die, improves the density uniformity of processing pipe, solves the problem that the surface of the processed pipe appears local depression because the flow of pipe raw material is blocked, improves the practicability of pipe forming device.

The utility model discloses a powder feeding mechanism and a magnetic core pressing device.The powder feeding mechanism comprises a material barrel, a rotating assembly and a material blocking assembly, a feeding port is formed in the top of the material barrel, a discharging port is formed in the bottom of the material barrel, the rotating assembly is arranged at the end, close to the discharging port, of the material barrel, and the material blocking assembly is arranged on the rotating assembly; the rotating assembly comprises a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are horizontally arranged in the middle of the discharging port, and the material blocking assembly comprises a first material blocking plate and a second material blocking plate. The first material blocking plate and the second material blocking plate are connected with the first rotating shaft and the second rotating shaft respectively, and the first rotating shaft and the second rotating shaft drive the first material blocking plate and the second material blocking plate to move respectively. And the first material blocking plate and the second material blocking plate gradually open the discharging opening from the side wall of the charging barrel.

This invention belongs to the field of isostatic pressing graphite technology, and particularly relates to an isostatic pressing graphite product molding die, including a processing table, a sealing platform fixedly disposed on the upper center of the processing table, a detachable rubber mold disposed on the sealing platform, a high-pressure cover with an opening facing downwards coaxially disposed on the processing table, and an upper port seal disposed on the inner wall of the top of the high-pressure cover. A lower port seal is coaxially disposed on the sealing platform, and a columnar core mold is coaxially disposed on the lower port seal. A floating pressure assembly is disposed at the bottom of the processing table, and the floating pressure assembly is connected to the lower port seal. The rubber mold is configured as a hollow columnar structure. This invention effectively overcomes the technical problem of the difficulty in eliminating the axial density difference when pressing large-sized, high aspect ratio slender products using existing isostatic pressing graphite molding dies. Compared with the existing technology where the axial density difference is usually 0.05-0.10 g / cm³, the axial density difference of slender products can be significantly reduced.

The invention belongs to the technical field of oil and gas fields, and discloses a spiral hydraulic jet efficient cement slurry distribution device and process, the bottom of a tank body is provided with a circulating pipeline, the circulating pipeline is inserted with a plurality of adjusting pipes, the adjusting pipes are in pipeline connection with nozzle connecting pipes, and the nozzle connecting pipes are provided with rotary hydraulic nozzles. Cement enters the tank body, a cement truck pumps a designed amount of clear water, the clear water sequentially enters the circulating pipeline, the adjusting pipe and the nozzle connecting pipe through the circulating inlet, high-speed spiral water jet is formed by rotating the hydraulic nozzle, and under the driving of spiral water flow, dry cement powder in the tank body spirally and irregularly flows along with the water flow to be fully and rapidly mixed. The device is easy to operate, high in cement slurry preparation efficiency and suitable for cement plug grouting slurry preparation operation with the ash amount within two cubic meters.

The invention relates to the technical field of silicon microrods, in particular to a preparation method of a novel synthetic silicon dioxide microrod. According to the technical scheme, the preparation method of the novel synthetic silicon dioxide microrod comprises the following steps: step 1, carrying out surface modification on a carbon nanotube template to enable the surface of the carbon nanotube template to be rich in oxygen-containing functional groups; 2, dispersing the surface-modified carbon nanotube template in a solution containing a surfactant and a silicon source, and carrying out a coating reaction of a silicon dioxide layer to form a core-shell structure; and step 3, removing the internal carbon nanotube template through calcination to obtain a silicon dioxide microrod, and carrying out enhanced ultrasonic acidizing treatment on the carbon nanotube at 80 DEG C for 2 hours by adopting a mixed acid solution of concentrated sulfuric acid and concentrated nitric acid in a specific volume ratio, so that the density and the distribution uniformity of carboxyl and hydroxyl functional groups on the surface of the carbon nanotube are remarkably improved, and the carbon nanotube is prepared. And the problems of coating layer defects and surface roughness caused by insufficient surface modification in the traditional method are effectively overcome.

The application relates to the technical field of inorganic non-metallic materials, and discloses a high-entropy oxide ceramic and a solid-phase reaction preparation method thereof; the high-entropy oxide ceramic is prepared by using multiple rare earth oxides, alkaline earth metal oxides and transition metal oxides with a purity of greater than or equal to 99.99% as raw materials, through the following steps of raw material pretreatment, chemical stoichiometric ratio batching, wet ball milling mixing, pre-sintering, secondary ball milling, composite forming, internal stress release, normal-pressure sintering densification and the like, and the high-entropy oxide ceramic bulk body with a single-phase solid solution structure, high density and stable performance is prepared. The process route of the application is simple and controllable, the raw material cost is low, no complex equipment is needed, the generation of multiple-component system heterogeneous phases can be effectively inhibited, the powder component uniformity is excellent, the prepared ceramic bulk body has high density, is suitable for large-scale industrial production, and can be widely applied to the fields of electronic information, aerospace, energy catalysis, heat protection and the like.

This invention discloses a method and rapid verification device for improving the one-time molding rate of large-size NdFeB products. The method includes: taking a selected amount of alloy powder, simulating the formal molding process in the rapid verification device, acquiring pressure-displacement data in real time during the molding process, and plotting a pressure-displacement curve; comparing the pressure-displacement curves of alloy powders with different powder state parameters when reaching the same compaction density, and selecting the powder state parameter with the most stable curve shape and the required molding pressure to reach that compaction density within a preset optimal range as the optimal powder state parameter; based on the optimal powder state parameter, producing large-size NdFeB green blanks in a formal production mold. This invention can efficiently screen out the optimal powder state parameters required for molding before inputting into the formal mold, significantly shortening the molding press debugging cycle, reducing trial and error costs, and significantly improving the one-time molding rate of large-size NdFeB products.

The invention discloses a pressing machine for solid balm forming and a pressing method thereof, and relates to the technical field of mechanical engineering, the pressing machine comprises a pressing table, and the top in the pressing table is fixedly connected with a hydraulic cylinder; through the arrangement of the mold pressing and positioning mechanism, the four V-shaped positioning plates do centering movement under the assistance of the guide disc, then the paste mold is clamped and positioned under the pressing column to wait for pressing operation, follow-up pressing force can be assisted to evenly act on all positions of the mold, it is guaranteed that balm is subjected to consistent pressure in the forming process, and therefore the balm forming quality is improved. Therefore, products with regular shapes and tidy edges are produced, the situation that local parts are not compacted is avoided, uniform pressing force can be uniformly transmitted to balm raw materials, density distribution of balm is more uniform, physical stability of balm is improved, internal stress caused by density difference is reduced, and the balm quality is improved. And the risk that the product cracks or deforms in the storage and transportation processes is reduced.

The present invention discloses a coating die head capable of adjusting the cavity pressure in the horizontal direction. The coating die head comprises an upper die head and a lower die head, wherein the front end gap between the upper die head and the lower die head forms a slit coating port; a storage cavity is provided in the lower die head, and the storage cavity is connected to the slit coating port; a cavity pressure regulating mechanism is arranged on the upper die head; the cavity pressure regulating mechanism comprises a slider located in the storage cavity, and a transmission regulating rod connected to the slider by a cam head; when the transmission regulating rod rotates, the cam head can drive the slider to move in the horizontal direction of the coating feed to adjust the cavity pressure of the storage cavity. The coating die head is provided with a cavity pressure regulating mechanism, which can realize the real-time and flexible adjustment of the cavity pressure of the storage cavity during the coating production process to adjust the flow rate and flow rate of the coating slurry; and it is equipped with a gap regulating mechanism to effectively complete the real-time adjustment of the flow rate and flow rate of the coating slurry during the coating production process.

The present invention discloses a device for continuously preparing radial bamboo chips along the grain, comprising a device for clamping bamboo material on the upper surface of a workbench, devices for planing bamboo material along the grain on both sides of the workbench, a planing blade on the planing device, a supplementary cutting blade and a guide and cutting device at the material outlet of the planing tool, and the planing device connected to a stroke control mechanism for controlling the thickness of the planed bamboo chips. The present invention also discloses a manufacturing method for preparing a new type of bamboo chip laminate by planing bamboo chips by the above device. The planing device of the present invention works along the grain of the bamboo material, effectively improving the surface quality of the bamboo chip and reducing tool wear. According to the natural curvature of the bamboo material, two high-quality chips, bamboo middle chip a and bamboo green chip b, are obtained. The cross section of the bamboo middle chip a is drum-shaped, has high-quality fluidity and transition between chips, and is used for surface paving. The bamboo green chip b is narrow and slender, has high strength and good toughness, and is used for core layer paving. The prepared bamboo chip laminate has high mechanical strength, uniform density, and high bamboo material utilization rate.

The invention relates to the field of controllable preparation of a single-walled carbon nanotube horizontal array, in particular to a method for efficiently growing a density-controllable single-walled carbon nanotube parallel array. A single crystal oxide substrate with the surface containing transition metal is annealed in a mixed atmosphere containing a growth control agent, the annealing process comprises a transition metal catalyst nanoparticle forming stage and a single-walled carbon nanotube growth stage, different stages correspond to mixed atmospheres with different components and concentrations, and the growth of the single-walled carbon nanotube is controlled by regulating and controlling a transition metal layer and annealing conditions. And the single-walled carbon nanotube parallel array with adjustable density in a large range is efficiently prepared. The density of the single-walled carbon nanotube parallel array is adjustable in a range of 0-250 / micron, and the single-walled carbon nanotubes are uniformly distributed. According to the method, growth control agents with different concentrations are introduced, so that high-efficiency preparation of the single-walled carbon nanotube parallel array from ultra-sparse to ultra-high density is realized, and a material foundation is laid for promoting practical application of the single-walled carbon nanotube parallel array in the fields of electronic information, catalysis and the like.

This invention relates to a method for forming large-size thin-plate ceramics, a forming mold, and the ceramic itself, belonging to the field of ceramic material forming technology. The method includes: filling, floating film floating, pressurization, depressurization-demolding-depressurization, and isostatic pressing steps. The depressurization-demolding-depressurization step includes: gradually depressurizing the upper pressure head while retaining a pre-set pressure; demolding, keeping the sample clamped between the upper and lower pressure heads, and lowering the floating mold until the sample is completely removed; and secondary depressurization: slowly reducing the pre-set pressure to zero, and retracting the upper pressure head to its initial position after leaving the sample. This invention effectively solves the problems of easy cracking, uneven density, difficult demolding, and easy deformation and damage during isostatic pressing of large-size thin-plate ceramics during the forming process, thereby enabling the preparation of high-quality, high-density, and uniform large-size thin-plate ceramic products.

The oscillating hot-pressing sintering process and equipment based on single and bidirectional switching includes single-direction oscillating hot-pressing, in which one end of the upper and lower pressure heads is locked, and the other end is used to implement single-direction oscillating hot-pressing on the sintered material; and bidirectional synchronous oscillating hot-pressing, in which the upper and lower pressure heads move synchronously, and implement synchronous bidirectional oscillating hot-pressing on the sintered material. The equipment includes a hydraulic station for providing a hydraulic power source, an upper pressure head and an upper pressure head cylinder, a lower pressure head and a lower pressure head cylinder, a reversing switching valve group for switching the working state of oscillating hot-pressing, and two control valve groups for controlling the pressure and flow of the pressure head cylinder. The input end of the reversing switching valve group is connected with the hydraulic station, the reversing switching valve group has two output ends, and the two output ends are connected with the upper pressure head cylinder and the lower pressure head cylinder through a control valve group, respectively. The oscillating hot-pressing sintering process and equipment based on single and bidirectional switching has the advantages of effectively improving the sintering quality, controllable cost, high efficiency and wide application range.

The invention relates to the technical field of sputtering target material preparation, and provides a spraying plane target material, a preparation method thereof and a piezoelectric sensor, and the preparation method of the spraying plane target material comprises the following steps: providing a plane target material substrate; target material powder is thermally sprayed to the to-be-sprayed face of the plane target material base body, a target material layer is formed, and then a sprayed plane target material is obtained through machining; wherein the to-be-sprayed surface comprises a slope surface structure, and the horizontal height of the slope surface structure is gradually reduced from the center to the periphery. According to the preparation method, a thermal spraying mode is adopted, long-time high-temperature sintering is not needed, energy consumption and cost can be reduced, and production efficiency can be improved. And warping caused by thermal stress of the target material layer is made up through the slope surface structure of the planar target material base body, the surface smoothness of the target material layer of the planar target material is improved, and the sputtering uniformity of the planar target material serving as a sputtering target material can be improved.

The utility model relates to the technical field of hydraulic machines, in particular to a bidirectional powder pressing machine capable of achieving floating demolding. Comprising a hydraulic machine, a floating demolding pressing mechanism is arranged in the hydraulic machine, the hydraulic machine is integrally fixed to a base support, the floating demolding pressing mechanism comprises a floating plate, a lower ejection cylinder, a floating cylinder and a core pulling cylinder, the lower end of the telescopic end of the floating cylinder is connected with a floating cylinder lengthening rod, and the lower end of the floating cylinder lengthening rod is connected with the floating plate; the floating plate is arranged in the hydraulic machine in an up-down sliding mode, the lower ejection cylinders are fixed to the two sides of the lower beam, the telescopic ends of the lower ejection cylinders are connected with lower punching ejection plates, the core-pulling cylinder is fixed to the middle of the lower beam, and the telescopic end of the core-pulling cylinder is connected with a core-pulling rod. According to the bidirectional powder pressing machine capable of achieving floating demolding, floating demolding can be conducted on a product after bidirectional pressing is conducted, the advantage that the density uniformity of the powder product obtained after bidirectional pressing is good is guaranteed, and the defect that a bidirectional powder pressing machine cannot achieve floating demolding is overcome.