31 results about "Resin infiltration" patented technology

The invention discloses a composite material VARI process resin permeation process analysis and control system and method. The device comprises a mold, a reinforcing material prefabricated body, a T-shaped glue injection pipe, a T-shaped glue outlet pipe, a valve, a resin storage device, a plurality of vacuum sources, a one-way breathable film, a permeation display layer, a transparent vacuum bag, a plurality of temperature sensors, image acquisition equipment, curing equipment, image analysis software, process control software and a product and mold three-dimensional model. Image acquisition equipment is adopted to realize image acquisition in the resin permeation process, image analysis software can identify a resin flowing front and map the resin flowing front into the combined three-dimensional model in real time according to the image information difference of a permeation area and a non-permeation area on the permeation display layer, and the permeation rate is quantitatively analyzed according to the resin flowing front. And the process control software realizes process control operation according to the process information fed back by other software and hardware. According to the technical scheme of the invention, online monitoring, analysis and automatic process control of VARI process resin permeation can be realized.

The invention discloses a forming method of a fiber reinforced composite material and the fiber reinforced composite material, and relates to the technical field of composite material forming. The forming method comprises the following steps: placing a fiber preform in a mold; according to a preset glue injection rule, resin is injected into the mold, and the preset negative pressure and the preset temperature of the mold are controlled, so that preset parameters of the resin meet preset conditions; when the resin is filled into the mold to a preset volume, vibrating the mold under a preset vibration condition to remove interlayer pores or bubbles of the fiber preform; and when the curing degree of the resin reaches a preset value, stopping heating and cooling to obtain the fiber reinforced composite material. According to the method, through cooperative glue injection of positive pressure and negative pressure, the infiltration speed of the resin can be increased, the forming period of the composite material is shortened, and the porosity of the composite material is reduced.

Provided is a method for determining the resin penetration into at least one porous coating material which is pressed with at least one carrier board and at least one resin layer arranged on the carrier board. During the pressing process the resin penetrates or rises into the at least one porous coating material.

Provided is a method for determining the resin penetration into at least one porous coating material which is pressed with at least one carrier board and at least one resin layer arranged on the carrier board. During the pressing process the resin penetrates or rises into the at least one porous coating material.

The present disclosure relates to the technical field of dental materials, and provides an antibacterial resin mixture, and a preparation method therefor and the use thereof. A resin-infiltrated ceramic composite material prepared by infiltrating the antibacterial resin mixture provided in the present disclosure into a porous ceramic framework and a dental material prepared from a component (2), i.e., the antibacterial resin mixture, can kill oral pathogenic bacteria around a prosthesis and effectively prevent secondary caries; moreover, compared with existing resin-infiltrated ceramic composite materials, the materials have significantly improved mechanical properties, especially significantly improved fracture load, improve the fracture resistance of the existing resin-infiltrated ceramic composite materials, and have good esthetic properties, thereby prolonging the service life of a prosthesis and enabling a prosthesis material to better utilize the properties thereof during service.

The invention relates to a resin permeable silicate ceramic composite material and a preparation method thereof, and the preparation method comprises the following steps: (1) mixing a silicate ceramic raw material, an additive and deionized water, and then drying to obtain ceramic powder; sequentially carrying out one-way axial compression and partial sintering on the ceramic powder to obtain silicate porous ceramic; (2) carrying out silane grafting modification on the silicate porous ceramic obtained in the step (1) to obtain modified silicate porous ceramic; and (3) performing resin permeation and curing on the modified silicate porous ceramic obtained in the step (2) to obtain the resin permeation silicate ceramic composite material. The resin permeable silicate composite material prepared by the method has the advantages of strong operability, high efficiency, low production cost, high product size precision and small deformation, and the minimum linear shrinkage rate can reach 10.5%; and the method has low requirement and loss on the mold, is suitable for large-scale production, and has great development potential and application prospect.

The invention discloses a continuous fiber reinforced composite material for a stent-free inflatable gas film and a preparation method of the continuous fiber reinforced composite material, and relates to the technical field of preparation of stent-free inflatable gas film materials. S2, constructing a fiber reinforcement body; s3, performing composite molding to prepare a green body; and S4, repairing treatment and performance detection. The three-step method of ultrasonic cleaning, gradient coupling agent treatment and segmented drying is adopted, the interface bonding force of fibers and resin is enhanced, all the resin and auxiliaries are fully and evenly mixed and reacted through resin premixing, uniform permeation of the resin is ensured through vacuum pressure in resin permeation forming, and defects are avoided; pressurizing and curing step by step, heating and pressurizing to ensure sufficient curing of the resin, and improving the surface performance and service life of the gas film through surface finishing, defect repairing and spraying of a protective coating.

Optimization method for the process curve of resin infiltration thermoplastic prepreg forming for thermal control. In the preheating stage, a camera or other image acquisition device is used to capture images of the preheating process in real time, and the preheating effect is evaluated through image analysis algorithms. In the heating and infiltration stage, the method uses thermocouples to control and maintain the set heating temperature. At the same time, the impregnation effect of the resin and fibers is evaluated in real time through image analysis and deep learning models. To more precisely meet specific quality standards, the objective function is also optimized so as to increase the loss when predicting low gloss but actually having high gloss. Finally, after curing and forming, the method further includes necessary post-processing and comprehensive quality inspection. Overall, the invention provides a highly integrated and adaptive solution aimed at improving the efficiency and quality of the thermoplastic prepreg forming process.

The utility model discloses a device for measuring the resin permeability of a composite material preform, and relates to the technical field of composite material production auxiliary equipment. The measuring device comprises a vacuum bag used for accommodating a plurality of preforms arranged at intervals; the flow guide net is arranged at the first ends of the plurality of prefabricated bodies and is used for guiding the flow of the resin; the resin conveying tank is located at the first end of the prefabricated body, connected with the flow guide net through a first guide pipe and used for conveying resin to the flow guide net; the resin collecting tank is located at the second end of the prefabricated body, connected with the second end of the prefabricated body through a second guide pipe and used for receiving the resin flowing out of the prefabricated body; the vacuum pump is connected with the resin collecting tank and is used for providing vacuum suction force, so that the resin flows to the second end from the first end of the prefabricated body; a pressure gauge is arranged on the second guide pipe and used for measuring the pressure value of the resin outlet end. The measuring device provided by the utility model can effectively measure the permeability of the resin at any time point of the preform during pouring.

This invention provides an aluminosilicate-based porous ceramic framework, its preparation method and application, resin-infiltrated ceramic materials and their applications, and dental prostheses, relating to the field of dental materials technology. Using Al2O3, SiO2, Na2O, and K2O as raw materials, the proportions of sodium, potassium, and silicon can be freely adjusted. By changing the relative content of sodium, potassium, and silicon, the porous ceramic framework prepared from aluminosilicate-based sodium-potassium salts exhibits different physicochemical properties. As a matrix, resin-infiltrated ceramic materials with different physicochemical properties and aesthetic characteristics can be prepared to meet the needs of various dental applications.

The present application relates to the technical field of epoxy resin curing agents, and specifically discloses a low-temperature epoxy resin infiltration consolidating agent, its preparation method and application. The low-temperature epoxy resin infiltration consolidating agent provided by the present application comprises the following components in parts by weight: Component A: 10-15 parts of free radical active diluent, 10-20 parts of surfactant; Component B: 35-33 parts of modified amine; Component C: 5-10 parts of low-temperature curing accelerator; wherein the modified amine is obtained by polymerization of alicyclic amine and acrylonitrile; the present application also provides a low-temperature epoxy resin prepared from the low-temperature epoxy resin infiltration consolidating agent and epoxy resin. The low-temperature epoxy resin infiltration consolidating agent provided by the present application has good low-temperature activity, good compatibility with epoxy resin, and can make the epoxy resin cured product have excellent toughness and permeability, thereby meeting the adaptability, efficiency and quality requirements of epoxy resin coating construction in low-temperature environments.

The present invention discloses a resin infiltration control system and its control method for the liquid molding VARI process. The control system includes: a mold, a preform, a fixture group, a vacuum bag group, a glue injection pipeline, a vacuum pumping device, and a semi-permeable membrane. The method includes: First, laying the preform above the mold; Second, laying an auxiliary material layer above the preform; Third, dividing the exhaust channels according to the thickness of the preform perpendicular to the resin infiltration direction, and drilling holes in the glue injection pipeline and the exhaust channels; Fourth, covering the holes of the exhaust channels with a semi-permeable membrane, and placing the glue injection pipeline and the exhaust channels above the auxiliary material; Fifth, performing steps such as sealing. The present invention establishes a "zero glue leakage" system for the composite material VARI process, which can accurately control the resin amount and reduce the resin waste phenomenon. Moreover, it controls the flow front of the resin infiltration process of the variable-thickness reinforcement preform, avoids the problem of air entrainment caused by the convergence of the flow front, and reduces the risk of quality problems such as dry spots and pores in the parts.

The utility model provides a thermoplastic resin fiber infiltration device, which relates to the field of composite material preparation and comprises a first plastic extruding machine joint mould, a second plastic extruding machine joint mould, a third plastic extruding machine joint mould and a fourth plastic extruding machine joint mould, after the first plastic extruding machine joint mold, the second plastic extruding machine joint mold, the third plastic extruding machine joint mold and the fourth plastic extruding machine joint mold are connected to form a cross-shaped mold, fiber channels are correspondingly arranged on the connecting surfaces of the two plastic extruding machine joint molds which are connected up and down; resin runners are correspondingly arranged on the connecting surfaces of the two plastic extruding machine joint molds which are connected left and right; heating holes for mounting heating rods are formed in the first plastic extruding machine joint mold and the third plastic extruding machine joint mold; and a thermocouple temperature measuring hole is formed in the first plastic extruding machine joint mold, so that the problem of insufficient and non-uniform resin infiltration in the prior art can be effectively solved.

The utility model provides a lightweight impact-resistant corrosion-resistant glass fiber reinforced plastic molded board, which relates to the technical field of glass fiber reinforced plastic molded boards and comprises a corrosion-resistant structure, a coating layer is arranged on the outer wall of one side of the corrosion-resistant structure, an impact-resistant structure is connected to one side, far away from the coating layer, of the corrosion-resistant structure, and the corrosion-resistant structure is connected with the coating layer. Comprising a corrosion-resistant layer arranged on the outer wall of one side of a coating layer, an additive body is arranged on the corrosion-resistant layer, and one side of the inner wall of the corrosion-resistant layer is fixedly connected with a fiber layer. The utility model solves the problems that the existing glass fiber reinforced plastic molded board mostly adopts a conventional resin and common glass fiber reinforced structure, is relatively insufficient in weather resistance and impact resistance, is easy to age and crack under long-term ultraviolet irradiation, is easy to lose impact under the action of dynamic load or sudden impact, and is not easy to damage. And the problems that pores and microcracks are generated due to non-uniform resin infiltration or low fiber arrangement precision, and the defects can cause corrosion medium permeation and accelerate performance degradation of the material are solved.

The invention discloses a pressure-assisted resin injection molding method for composite material molding, which comprises the following steps: step 1, a reinforced material preform, a glue injection channel and a glue outlet channel are sealed and packaged on a mold in a vacuum manner by adopting a vacuum bag, and a plurality of resin pressure sensors are arranged in the vacuum bag; 2, resin flows into the vacuum bag from the glue injection channel, meanwhile, negative pressure is applied to the upper portion of the vacuum bag, the resin flows out of the glue outlet channel after completely permeating the reinforcing material prefabricated body, the negative pressure is removed, and the glue injection channel is closed; 3, before resin curing, positive pressure is applied to the upper portion of the vacuum bag, part of resin is discharged from the glue outlet channel, after the positive pressure is kept for preset time, the glue outlet channel is closed, and a composite product is obtained through curing. According to the invention, the technical problems of resin permeation uniformity control and preform infiltration in the existing VARI process are solved.

The utility model relates to a barrel-shaped RTM (Resin Transfer Molding) resin transfer heating forming mold. An existing mold causes incomplete resin infiltration of a prefabricated body, long mold filling time, high error probability and influence on product quality. According to the scheme, the die comprises a core die and an outer die, the core die is sleeved with the outer die, and the upper portion of the small-diameter end and the upper portion of the large-diameter end of the core die are each provided with a first sealing groove; the outer die is in a ring shape defined by four arc-shaped pieces, the two side edges of each arc-shaped piece are turned outwards, threaded holes are formed in the turned edges, and every two adjacent arc-shaped pieces are connected through bolts. A step is arranged on the lower side of the inner wall of each arc-shaped piece in an inwards-concave mode and erected on the limiting step of the core mold, a boss is arranged on the upper side of the inner wall outwards, and a sealed barrel-shaped mold cavity is formed after the core mold and the outer mold are combined. Glue injection openings are formed in the two opposite arc-shaped pieces, and glue outlets are formed in the other two opposite arc-shaped pieces. The device has the characteristics of simple structure, easiness in operation, high precision, good sealing performance, long service life and the like.

The invention relates to the technical field of aircraft accessory processing, in particular to a carbon filament resin infiltration device for an aircraft girder, which comprises an infiltration box fixed on a base, a multi-connecting-rod mechanism for winding and infiltrating a carbon filament with resin is arranged in the infiltration box, and the multi-connecting-rod mechanism is positioned below the liquid level of the resin in the infiltration box; the side wall of the infiltration box is provided with a scraping cylinder used for scraping redundant resin on the surface of the carbon filament, the scraping cylinder is located above the liquid level of the resin, the bottom of the infiltration box is provided with a winding mechanism used for winding the infiltrated carbon filament into a cylinder and a circulating mechanism used for circularly filtering the resin, and the winding mechanism is in transmission connection with the circulating mechanism and the multi-connecting-rod mechanism. According to the carbon filament resin infiltration device for the aircraft girder, resin is more thoroughly immersed in carbon filaments, winding is carried out while the carbon filaments are infiltrated with the resin, time and labor are saved, the production efficiency is improved, the fluidity of the resin is improved while the carbon filaments are wound, and the resin is better combined with the surfaces of the carbon filaments.

The utility model relates to the technical field of aerospace thermal protection and force bearing part manufacturing, in particular to an observable thermosetting resin vacuum tank auxiliary resin transfer system. The problems that in the resin injection process, the injection process and the resin infiltration degree of a prefabricated body cannot be directly observed, so that the resin injection process is uncontrollable, incomplete resin infiltration is likely to occur, a poor resin area appears in a product, and the product quality is affected are solved. According to the technical scheme adopted by the utility model, the device comprises an air compressor, a glue storage tank, a vacuum tank and a vacuum pump, wherein a mold is arranged in the vacuum tank; the air compressor is connected with a glue storage tank air inlet valve of the glue storage tank through an air pipe, a glue storage tank air outlet valve of the glue storage tank is connected with the vacuum pump through an air pipe, a glue outlet valve of the glue storage tank is connected with a vacuum tank glue injection port valve of the vacuum tank through a glue pipe, and a mold glue injection port valve of the mold is connected with the vacuum tank glue injection port valve through a glue pipe. The die is a combined die with a sealed lower end and an open upper end.

The utility model relates to the technical field of lighter shell processing equipment, and discloses an epoxy resin infiltration device for lighter shell processing, the epoxy resin infiltration device comprises an infiltration barrel, a support frame, a display screen, a support ring and a support net, the support frame is welded to the top of the infiltration barrel, the display screen is arranged on one side of the support frame, and the support ring is welded to the inner side of the infiltration barrel; the supporting net is arranged on the inner side of the supporting ring, an adjusting mechanism is arranged at the top of the infiltration barrel, a stirring mechanism is arranged in the infiltration barrel, the adjusting mechanism comprises an electric cylinder, a connecting rod, a supporting plate, a supporting piece, a clamping plate, a clamping piece and a spring, and the electric cylinder is arranged in the middle of the top of the supporting frame. According to the epoxy resin infiltration device for machining the lighter shells, by adjusting the height of the supporting plate, the supporting plate drives the lighter shells to move downwards through the supporting pieces to be inserted into epoxy resin to be infiltrated, the infiltration device can conveniently machine the lighter shells at the same time, and therefore the machining speed of the lighter shells is increased.

The present invention discloses a resin infiltration control system and method for a foam core composite material by the VARI process. The control system includes a mold, a fiber-reinforced preform, a foam core, an auxiliary material layer, a flow guiding layer, a vacuum bag, a resin injection pipeline, a resin outlet pipeline, pipeline control valves, a resin reservoir, a vacuum source, and speed bumps. Among them, a plurality of through holes are provided in the foam core along the thickness direction, and the speed bumps are arranged on both sides of the foam core in the plate-plate area and the upper skin plate-core area of the flow guiding layer. The present invention realizes precise control of the resin infiltration process of the foam core composite material by adjusting the opening position of the foam core, the width of the speed bumps, and the position of the speed bumps. The present invention solves the problems of large differences in resin infiltration effects in various regions of the foam core composite material and difficult control of the infiltration process, and can achieve efficient and high-quality resin infiltration, ensuring the quality stability of the formed parts.

The invention discloses a CIPP thermocuring hose resin infiltration rolling platform, and relates to the field of pipeline non-excavation repair, the CIPP thermocuring hose resin infiltration rolling platform comprises a machine box, one end of the machine box is sequentially provided with a first pressing roller and a second pressing roller which are used for rolling a hose from bottom to top, the CIPP thermocuring hose resin infiltration rolling platform further comprises a rotating frame, and the rotating frame is rotationally connected to the other end of the machine box; a moving roller is installed in the direction close to the extrusion roller set, the rotating frame comprises a continuous horizontal part and an inclined part, bearing rollers are installed on the rotating frame at intervals along the horizontal part and the inclined part, and when the top end of the moving roller is flush with the top end of the first pressing roller, the horizontal part is in a horizontal state; and after the rotating frame rotates, the moving roller can be higher than the first pressing roller. The rotating frame is connected to one side of the extrusion roller, so that local resin accumulation is effectively relieved, the extrusion roller can roll the hose more uniformly, and the infiltrating and rolling effect of resin is improved.

The invention belongs to the technical field of ultra-precision machining, and relates to a surface treatment method of an anti-adhesion single crystal diamond cutter for resin cutting. According to the method, a tool nose cutting a resin workpiece is heated to the resin softening temperature, softened resin is slightly scraped and removed through a tool, the surface of a tool is prevented from being scratched, and the surface roughness of the tool is preliminarily reduced. And through ultra-precision polishing pretreatment, the surface roughness of the cutter is further reduced. By constructing an inert surface, the surface energy is reduced, the contact angle of molten resin is larger than 90 degrees, and resin infiltration and adhesion are blocked. Through dual-mechanism synergistic anti-sticking, the surface smoothness is improved and the resin adhesion is eliminated through physical-grade treatment, and then the super-hydrophobic resin characteristic is endowed through chemical-grade treatment, a C-H bond inert layer, a contact angle improvement, molten resin infiltration inhibition and a C-F bond. Through the design of the cutting edge, the thickness of the hydrogenated layer is smaller than 1 nm, the radius of the cutting edge is kept to be 50-80 microns, the bonding area is reduced, the thermal stability is improved, the requirement for the resin processing temperature is met, and the anti-sticking effect is remarkably improved.

The utility model belongs to the technical field of carbon fiber composite material processing devices, and particularly relates to a resin infiltration auxiliary device for a carbon fiber composite material, which comprises a stirring barrel, the top of the stirring barrel is fixedly connected with a first motor, the outside of a driving gear is meshed with a driven gear, and the bottom of the driven gear is rotatably connected with a supporting column. A telescopic assembly is installed at the side end of the stirring barrel, a connecting rod is fixedly connected to the end, located in the stirring barrel, of a limiting column, a first spring and a scraper blade are arranged outside a fixing column in a sleeving mode, a spray head is fixedly connected to the inner top of the stirring barrel, and a stirring piece is rotationally connected to the interior of the stirring barrel; the end, away from the limiting column, of the connecting plate is fixedly connected with the output end of an electric telescopic rod. Through the arrangement of the driving gear, the driven gear, the limiting column, the connecting rod and the scraping plate, residues on the inner side wall of the stirring barrel can be conveniently cleaned; and by arranging a second spring, a third spring and an electric telescopic rod, the cleaning efficiency is improved.

The invention provides a high-strength nano-modified dental restoration material and a preparation method thereof.The high-strength nano-modified dental restoration material is prepared from, by mass, 35-70 g of polyformaldehyde resin, 20-50 g of nano-zirconia ceramic, 2-5 g of coupling agent, 1-5 g of adhesive and 2-8 g of inorganic filler, the adhesive is phosphoric acid derivative modified polyvinyl alcohol. Polyformaldehyde resin is adopted as a resin base material, and nano zirconia ceramic is added as a ceramic phase, so that the resin-permeable ceramic network composite material is formed, and the mechanical property is enhanced; the adhesive is phosphoric acid derivative modified polyvinyl alcohol, so that the permeability of the resin is promoted, the adhesion among the components is enhanced, the mechanical property of the resin permeating ceramic network composite material is further improved, and the application of the resin in dental restoration is widened.

The present invention relates to the technical field of dentures, and provides a porous ceramic framework, a preparation method thereof, and a double-bionic resin-ceramic composite material. The porous ceramic framework provided by the present invention is a three-dimensional structure formed by an array of a plurality of unit cell structures; the unit cell structure is a cube provided with through holes, the through holes are chamfered three-cylinder structures, the three cylinders in the three-cylinder structure have the same size, and the length of the cylinder in the three cylinders is the same as the side length of the cube. By changing the parameter D, the present invention controls the porosity of the pore unit and constructs a porous ceramic framework with a gradually changing porosity from the bottom to the top, achieving the bionics of resin-infiltrated ceramic materials and human teeth to the greatest extent in terms of physical properties; the porosity, pore size, and pore distribution of the porous ceramic framework provided by the present invention have strong controllability and can achieve a three-dimensional through structure, achieving the bionics of resin-infiltrated ceramic materials and human teeth to the greatest extent in terms of structure.

The present invention discloses a dental restorative material with a mechanical gradient, a preparation method thereof, and an application thereof. The dental restorative material is prepared from micron-sized powders having a particle size of 90 μm to 100 μm and at least one particle size of 30 μm to 90 μm, and two or more glassy silicate granules having a particle size of 50 nm to 1000 nm as raw materials. The materials are stacked in descending order of particle size and from bottom to top, and pressed twice, wherein the first pressing adopts 3t to 6t ultrahigh pressure pressing, and the second pressing adopts 50 to 250 MPa cold isostatic pressing, and is pressed into a multilayer ceramic body, which is obtained by high-temperature sintering and resin infiltration curing. The dental restorative material provided by the present invention has a gradient change in its organizational structure and mechanical properties, and is close to the mechanical changes of native teeth, can be well adapted to native teeth, and can be used to repair different parts of teeth.

The invention discloses a double-helix carbon nanotube enhanced lightweight robot cable and a preparation method thereof. The double-helix carbon nanotube enhanced lightweight robot cable comprises a conductive core wire, a first enhancement layer, a second enhancement layer and an insulating coating layer which are sequentially arranged from inside to outside, according to the invention, through a double-helix reverse winding structure, a concave-convex structure and resin permeation, the tensile strength and the anti-torsion angle are improved while the flexibility of the cable is maintained, and the problem of cable breakage in joint movement of a robot is solved; the interface bonding strength of the carbon nanotubes and resin is improved through plasma etching and the polydopamine bonding layer, the bending life is prolonged by combining the stress release design of the corrugated insulating layer, and reliable guarantee is provided for continuous operation of an industrial robot; on the basis of a metal reinforced cable, the weight is reduced, the silver-plated nylon shielding layer provides effective electromagnetic shielding effectiveness, the thermoplastic polyurethane material provides enough tolerance, and the requirements of high-end fields such as automobiles and aerospace for light-weight and high-reliability robot cables are met.

The invention discloses a composite material grating sandwich surrounding shell structure based on a resin pouring process and a preparation method thereof, and belongs to the technical field of composite material processing. According to the surrounding shell structure, a wing-shaped surrounding shell structure body is jointly composed of a glass fiber reinforced composite material grating, a glass fiber reinforced composite material panel and PMI filling foam, and all the components are jointly and integrally formed through an epoxy resin matrix. One-time curing forming of the whole structure is achieved through the resin wettability of the glass fiber, and compared with a traditional composite material structure preparation process, the method has the advantages of being high in plasticity, good in final forming quality of a special-shaped structure, low in process cost, few in preparation defect and the like.

The invention discloses a hot-press molding grinding wheel based on liquid phenolic resin and a preparation method of the hot-press molding grinding wheel, and belongs to the technical field of grinding tool manufacturing. The preparation method comprises the steps of raw material preparation, mixing and blank making, hot-pressing curing, post-curing treatment, processing and checking. Resol type liquid thermosetting phenolic resin is adopted as a binding agent in the raw materials, and is matched with a grinding material with a specific particle size, a functional filler and a curing accelerator, and the problems that a traditional powdery resin grinding wheel is poor in mixing uniformity and insufficient in resin infiltration are solved through step-by-step feeding and mixing, step-by-step heating and pressurizing hot-pressing curing and step-by-step heating post-curing treatment. The hardness uniformity deviation of the prepared grinding wheel is within + / -2HRY, the grinding material is fully infiltrated and combined by liquid phenolic resin, and the grinding wheel has high bonding strength, excellent grinding performance and long service life, can be made into various types such as cutting discs and cymbal-shaped grinding wheels, and is suitable for processing materials such as metal and ceramic.

To provide a low-cost insulation rolling bearing capable of preventing the peeling or creep of an insulation resin layer.SOLUTION: In the face where an insulation resin layer 4 is formed, out of the outer peripheral face of an outer ring 1 and the inner peripheral face of an inner ring 2 of the insulation rolling bearing, a knurl processing part 18 is provided consisting of a plurality of V-grooves 17 arranged in parallel to each other at constant pitches, where resin to form the insulation resin layer 4 enters.SELECTED DRAWING: Figure 1