17 results about "Investment material" patented technology

A manufacturing system for a multifunctional composite mala colored stone material, characterized in that: It comprises a raw material pretreatment module, a precision composite manufacturing module, a finished product post-treatment module, which are connected in sequence, and an intelligent control module that networks the respective modules; that the raw material pretreatment module contains an aggregate treatment unit and an auxiliary material treatment unit, for the aggregate treatment unit a link of “vibrating feed → jaw coarse crushing → cone medium crushing → VSI sand production-shaping → classification by means of a multi-deck circular vibrating screen” is used, through the classification aggregates are obtained in specifications of 30 meshes, 50 meshes, 80 meshes, 120 meshes, the auxiliary material treatment unit is equipped with an LM vertical mill and a drying-dehumidifying device;that the precise compound manufacturing module includes an intelligent dosing unit and a mixing modification unit, the intelligent feeding unit is controlled by a PLC control system networked with an electronic dosing scale, and the precision error of a proportional division is ≤ ± 0.5%.

The application discloses a molding method and tool of a composite material pattern plate in the technical field of composite material manufacturing, and comprises the following steps: S1: selecting an original mold with a target pattern as a basis, and preparing a molding negative mold which is complementary to the target pattern through a first composite material molding process; S2: taking the molding negative mold as a production mold, and preparing a composite material pattern plate with the target pattern through a second composite material molding process, wherein the first composite material molding process and the second composite material molding process are both vacuum introduction processes, and the vacuum introduction process comprises the steps of reinforcing material laying, auxiliary material arrangement, vacuum packaging, vacuumizing, resin injection, curing and demolding. The application adopts an existing stainless steel pattern plate as an original base mold, does not need to separately design and process a customized mold, and the molding negative mold can be repeatedly used, and meanwhile, the vacuum bag packaging tool is combined, so that the time cost and economic investment of mold preparation are greatly reduced, and the production demand of small batches and multiple varieties is adapted.

The present application relates to the technical field of aircraft body structure repair, in particular to a method for improving the adhesion of composite material bonding repair metal structure, comprising the following steps: determining the damage range by visual inspection and non-destructive testing method; then using artificial polishing method to pretreat the surface of the damaged part; preparing composite patch material, adhesive and related auxiliary materials; laying the patch according to the design requirements; packaging the vacuum bag, installing the heating unit and curing; post-processing the patch; checking the composite patch; according to the gap size and area size of different regions, cutting the appropriate size of glass fiber fabric; marking the installation position of the patch by using the red pencil line method; mixing the glue; cutting a layer of glass cloth, the size of which is larger than the total size of the required filling size, and the glass cloth is treated by dipping in glue. The present application can effectively control the thickness of the glue layer, increase the controllability of the repair process, improve the tensile shear strength after bonding, effectively improve the actual repair effect, and meet the actual use requirements.

The invention discloses a process for preparing 95 aluminum oxide ceramic by using dry pressing and granulation powder tailings. The process comprises the following steps: S1, preparing raw materials; s2, performing pretreatment; s3, adding auxiliary materials; s4, mixing and homogenizing treatment; s5, adjusting and refining treatment; s6, granulating and forming; s7, sintering treatment is carried out; and S8, carrying out post-treatment and detection. According to the method, the tailings generated in the processing process are recycled as raw materials, so that resource waste caused by direct discarding of the tailings is avoided, and cyclic utilization of the materials is realized. The tailings are subjected to pretreatment such as sedimentation, ball milling, sieving and iron removal, and a proper amount of aluminum oxide micro powder is added, so that raw material components are uniform and pure; the dry pressing molding and sintering process are combined to ensure the densification of the green body, so that the prepared 95 aluminum oxide ceramic is superior to the traditional prior art in the aspects of voltage resistance, breaking strength, hardness and appearance quality, and the problems of low voltage resistance, surface stripes and the like of the traditional tailing recycled ceramic are avoided.

The invention discloses an iron-copper alloy-based friction plate and a preparation method thereof. The iron-copper alloy-based friction plate comprises the following raw materials in percentage by weight: 70-80% of iron-copper alloy powder, 7-15% of a friction reinforced phase composite material, 2-7% of a friction auxiliary material, 8-15% of a solid solution strengthening material, 0.7-1.5% of graphite and 0.5-1% of a lubricant, the friction reinforced phase composite material is a mixture of silicon dioxide, silicon carbide and aluminum oxide; the friction auxiliary material is a mixture of silicon-aluminum whiskers, calcium silicate whiskers, manganese-zinc alloy powder and carbon fiber powder; the solid solution strengthening material is zinc-tin-phosphorus alloy powder. The preparation method comprises the following steps: preparing materials; performing compression molding; sintering is performed; and machining and surface treatment. According to the invention, the raw material formulas cooperate with each other and cooperate with each step of the preparation method, so that the prepared product is good in wear resistance and stable in friction coefficient.

The utility model relates to the technical field of composite material manufacturing, and discloses a composite material rapid sealing device for monitoring ionic viscosity, which comprises an adhesive tape crimping device and an objective table, a first slide rail and a second slide rail are arranged on the objective table; the adhesive tape crimping device comprises a first chute, a second chute, a first end plate, a second end plate and a fixed knob; the first sliding groove and the second sliding groove are movably assembled on the first sliding rail and the second sliding rail respectively, the two ends of the first end plate are movably assembled in the first sliding groove and the second sliding groove respectively, the second end plate is fixed between the first sliding groove and the second sliding groove, and the fixing rotary knob is connected with one end of the first end plate. Compared with a traditional mode that the bag body needs to be totally closed through sealant, the first end plate and the second end plate in the adhesive tape crimping device can be matched with the fixing rotary knob to seal the unsealed edge of the bag body, and the sealing operation before each composite material curing monitoring experiment is omitted; and auxiliary materials used for packaging each time are saved.

The invention provides a side wall plate which comprises a substrate layer and elastic layers, the elastic layers are laid on the two sides of the substrate layer, a plurality of hemp holes are formed in the elastic layers, the hemp holes are evenly distributed in the elastic layers in an array mode, the substrate layer is embedded into the hemp holes in a vulcanization mode, and the vulcanization gluing area of the substrate layer and the elastic layers is increased through the hemp holes. The invention further provides a through channel. The through channel comprises the side wall plate, a rotating shaft assembly and a vehicle body profile. The invention further provides a preparation method for preparing the side wall plate. The preparation method comprises the following steps: step 1, putting raw materials into the lower mold; 2, auxiliary materials are laid on the raw materials; 3, vacuumizing is conducted after mold closing; 4, the temperature and the pressure are kept till vulcanization is completed; and 5, opening the mold, and taking out the side wall plate. According to the side wall plate manufactured through the manufacturing method, the original strength of the side wall plate is kept, meanwhile, the elasticity of the side wall plate is improved, the service life is prolonged, and the side wall plate can be suitable for a more complex driving environment.

The invention provides a barium-rich ceramic dielectric material, a multilayer ceramic capacitor and a preparation method thereof, and relates to the technical field of ceramic dielectric. The barium-rich ceramic dielectric material comprises the following components in percentage by mass: 97.0-99.5% of a main crystal phase A, a stoichiometric formula of BaxTiO3, 1.000 < = x < = 1.050, 0.2-1% of an auxiliary material B, TiO3 with a stoichiometric formula of (M, Mn), and 0.3-2% of a modified additive, wherein M is one or more of Mg, Ca and Sr. The preparation method comprises the following steps: carrying out step-by-step wet ball milling, calcining to prepare the main crystal phase A and the auxiliary material B, mixing with the modified additive, and carrying out ball milling and drying to obtain the ceramic dielectric material. When a multilayer ceramic capacitor is prepared on the basis of the material, the material, absolute ethyl alcohol and a PVB adhesive are mixed for pulping and film casting, after treatment such as overprinting and isostatic pressing with nickel slurry as an inner electrode, sintering is performed for 1.5-6 hours at the temperature of 1180-1300 DEG C in a reducing atmosphere, and the multilayer ceramic capacitor is prepared. The capacitor is excellent in dielectric property, is adaptive to a cheap metal inner electrode, and meets the X7R characteristic requirement.

A rolling apparatus for an annular workpiece includes roller, a rolling wheel device, a base, and a stand. The roller has two circular frames that holds the annular workpiece therein using removable fixing members. After an outer circumferential surface of the annular workpiece is tightly wrapped by an investment material, the fixing members are removed to leave a through hole at the center of the investment material and the annular workpiece has its inner circumferential surface exposed at the through hole. The cylindrical rolling wheel of the rolling wheel device passes through the through hole of the investment material and rolls on the inner circumferential surface of the annular workpiece against a rolling platform of the base to increase the density of the annular workpiece. During the rolling operation, the investment material positions the annular workpiece and protects textures and patterns preformed on the outer circumferential surface.

The invention relates to an out-of-plane / in-plane differential response flexible sensing material and a preparation method thereof, and belongs to the field of flexible sensing materials. The chemical formula of the flexible sensing material is xAg / PDMS, the numerical value of x is 0-60 vol% and is not 0, x is the volume ratio of Ag to PDMS, the particle size range of Ag nanoparticles is 0.01-20 [mu] m, the functional auxiliary material of the flexible sensing material is a perovskite structure ferroelectric ceramic material (BCZT), and the volume ratio of Ag to BCZT is 3: 100. According to the flexible sensing material, silver nanoparticles and PDMS are compounded, and the silver nanoparticles are regulated by means of an external electric field to form Ag nanoparticle columns which are aggregated in the out-of-plane direction and are isolated from one another, so that the Ag nanoparticles are arranged in a chain shape in the out-of-plane direction, and differential response of high out-of-plane sensitivity / insensitive in-plane sensitivity is achieved; the construction of a quasi-conductive network is realized under the condition of low filling amount, meanwhile, good mechanical flexibility of the material is maintained, and the specific types and geometrical shapes of the conductive particles can be flexibly selected according to actual requirements.

The utility model relates to a turnover assembly type wall reinforcing steel bar positioning ladder frame which comprises vertical stand frames, reinforcing steel bar clamping grooves are formed in one ends of the vertical stand frames, supporting plates are arranged on one sides of the vertical stand frames, and the pair of vertical stand frames are symmetrically arranged at intervals; and the transverse support is arranged between the pair of vertical stand frames and is detachably connected with the vertical stand frames through a supporting plate. By adopting a modular structure, the device can be assembled and disassembled at any time, is free from one-time input of materials and can be used repeatedly, so that the input cost of the materials is greatly reduced. The distance between the pair of vertical stand frames is adjusted by replacing the transverse supports with the different bayonet distances, the device can be suitable for positioning and installing wall steel bars of different thicknesses, and the application range is wide.

The utility model belongs to the technical field of production and processing, and discloses a hot extrusion forming die for a lower pipe seat of an air leg type rock drill, which aims to solve the technical problems in the processing of the lower pipe seat of the air leg type rock drill part in the prior art. An upper die is installed at the bottom of an upper base plate connected with a 400T press machine, a lower die is installed on a lower base plate, a punch is connected with the bottom of a punch base plate connected with a 315T press machine, and a drain plate is installed on a drain plate base plate. And then the workpiece is placed in a drain plate, a cylindrical hole of the workpiece is punched out through a punch, and then the formed workpiece blank is subjected to descaling and warehousing after being inspected to be qualified. A precision casting process is replaced by a hot extrusion process, so that the defects that the casting production cost is relatively high, the production period is long, the consumption of auxiliary materials is high and the environment is influenced are overcome.

The application relates to the technical field of composite material forming, and discloses a short beam strength test test plate forming method, which comprises the following steps: S1, main material preparation; S2, mold preparation; S3, auxiliary material preparation; S4, pre-laying inspection; S5, laying; S6, packaging; S7, curing; S8, demolding; and S9, apparent quality inspection.

This invention discloses a molding process for variable cross-section, large thickness, torsional composite material pipe fittings. The key technical points are as follows: Step 1: Manufacturing a metal liner using a metal 3D printer, manufacturing in segments and then welding them together as a whole; Step 2: Material preparation: Preparing the required main and auxiliary materials before production and confirming the equipment status; Step 3: Tooling preparation: Cleaning and treating the mold surface to bring it to a usable state; The molding mold includes a mold body and three inserts, the dimensions of which correspond to the state after the metal liner is covered with 3mm, 6mm, and 9mm prepreg, respectively; The laying area in the middle of the three inserts is consistent with the surface of the part after the part is covered with 3mm, 6mm, and 9mm prepreg, respectively; Step 4: CNC blanking: Blanking according to the part's layup design; This invention solves the problem that traditional winding molding and pultrusion molding processes cannot mold variable cross-section, large thickness, torsional composite material pipe fittings.

The utility model belongs to the technical field of metallurgical auxiliary material processing, and particularly relates to a metallurgical auxiliary material vibration grading screening device which comprises a screening machine body, a plurality of screening cavities are formed in the screening machine body, and material controlling and stripping assemblies are arranged in the screening cavities. The material control and stripping assembly comprises a V-shaped material shaking vibration plate and a plurality of separation extending columns, the V-shaped material shaking vibration plate is provided with a vibration face, and the V-shaped material shaking vibration plate is provided with a material filtering groove used for material leakage; when materials enter the screening machine body, the materials can be controlled to be in a vibration state under the action of vibration faces on the two sides of the material filtering groove, the materials are concentrated on the periphery of the outer side of the material filtering groove, meanwhile, the materials can make contact with the outer surface positions of the separation stretching-in columns under the influence of the separation stretching-in columns, and the materials are further peeled off; the stripped materials pass through the material filtering groove and are screened through the first screening net and the second screening net, caked materials can be treated in the grading screening process, and screening work is facilitated.

The present application relates to the production process of ceramic color, in particular to a kind of silver gray ceramic color and its production method, the method is by controlling the granularity of fused zirconia, adding quartz powder, coloring agent cobalt oxide, nickel oxide, chrome green, iron oxide, auxiliary material sodium fluorosilicate, magnesium fluoride, potassium chloride, according to certain proportion is mixed and grinded, then the mixed material is heated and calcined, after cooling, again after grinding and crushing, the sample is prepared.The silver gray color produced is in the better color effect, the process flow is simple, harmful gas is not produced in the production process, the process is green and environmental protection, under the same conditions, the color material use cost of ceramic color industry is saved, the product demand in the field such as daily-use ceramic and industrial ceramic is met.

The invention provides a high-performance zinc oxide piezoresistor ceramic material, a preparation method thereof and a zinc oxide piezoresistor. The ceramic material comprises the following components in percentage by mass: 85-90% of large-particle ZnO, 1-6% of an auxiliary material and 4-14% of a modified additive. The auxiliary material is NixCoyMnZ (OH) 2 with the specific surface area larger than 20 m < 2 > / g, the value ranges of x, y and z are all 0.1-0.8, and x + y + z = 1. The preparation method comprises the following steps: carrying out wet ball milling on an auxiliary material and a modified additive to obtain mixed slurry, adding the mixed slurry into large-particle ZnO, mixing, and drying to obtain the high-performance zinc oxide piezoresistor ceramic material with good dispersibility, uniformity and stability. The ZnO of the material forms a coating layer, and the piezoresistor obtained by pressing can be sintered into ceramic in an air atmosphere in a wide sintering temperature range of 1020-1250 DEG C, has good surge performance, has a voltage gradient of more than 190 V / mm, can pass a 385AC loading * 125 DEG C * 1000 H test, and has a wide market application prospect.