33 results about "Gelcoat" patented technology

The invention discloses a composite insulating arm surface repairing material and a repairing method, and the repairing material comprises the following raw material components in parts by weight: 100 parts of matrix resin, 0.8-4 parts of a curing agent, 0.2-1.2 parts of an accelerant, 5-20 parts of color paste, 10-25 parts of inorganic particles, and 10-25 parts of inorganic fibers. The repairing material is simple in preparation method and convenient to use, according to the repairing method, the repairing material is used for replacing gel coat spraying repairing, the operation difficulty is low, the repairing duration is shortened, the repairing efficiency is improved, and all technical indexes of the repaired insulating arm component can meet the use requirements.

The invention relates to a multi-layer glass fiber reinforced plastic production line, a production method and multi-layer glass fiber reinforced plastic, and relates to the field of glass fiber reinforced plastic production equipment.The multi-layer glass fiber reinforced plastic production line comprises a bottom film processing unit, a first fiber laying and gluing unit, a composite thickness determining unit, a heating and curing unit and a trimming and cutting unit which are sequentially arranged; the upper layer processing unit is capable of forming a top film gel coat on the top film and / or paving a second fiber layer on the top film and infiltrating a second resin adhesive on the top film and forming a semi-cured state, and the lower layer processing unit is capable of forming a second fiber layer on the top film and infiltrating a second resin adhesive on the top film and forming a semi-cured state. The composite thickness determining unit can lay the second fiber layer on the first fiber layer to form a composite glass fiber reinforced plastic material with a set thickness, and the composite glass fiber reinforced plastic material is heated and cured by the heating and curing unit and trimmed and cut by the trimming and cutting unit to form the composite glass fiber reinforced plastic, so that the production quality of the composite glass fiber reinforced plastic product can be ensured.

The invention discloses a non-pressure-resistant shell main structure of an unmanned underwater vehicle and a machining method, and relates to the technical field of underwater vehicles. The device comprises a lower shell and frameworks, the lower shell and the frameworks are fixedly connected in an up-and-down buckling mode, a transverse framework and a longitudinal framework are fixedly connected in a mutually perpendicular mode, and metal embedded parts are bonded to the positions, where equipment and a floating material body are installed, of the transverse framework and the longitudinal framework; the shell and the framework are both made of carbon fiber composite materials, a buoyancy material is arranged in the space formed by the shell and the framework, the buoyancy material, the shell and the framework form an integral revolving body streamline structure, and during processing, a modified epoxy gel coat is adopted, so that the performance of the shell is improved by means of blocking of nano-montmorillonite, wear resistance of silicon carbide and toughening of polyurethane microspheres. Water-resistant, wear-resistant and impact-resistant surface protection is provided for the shell, and underwater erosion and collision are resisted; the wettability and binding force with the carbon fiber cloth are improved by adopting the modified epoxy resin, and the mechanical bearing capacity of the composite material is enhanced.

The utility model belongs to the technical field of bridge secondary reinforcement, and particularly relates to a dipping glue scraping tool applied to carbon fiber cloth reinforcement, which comprises a V-shaped glue groove for storing glue, and a roller brush for realizing glue scraping operation by rolling on the surface of carbon fiber cloth is arranged in the V-shaped glue groove. The front side of the V-shaped glue groove is provided with a rotary rolling roller set which moves synchronously with the V-shaped glue groove and is used for rolling the carbon fiber cloth, and a handrail used for being held by hand is arranged between the V-shaped glue groove and the rotary rolling roller set. According to the utility model, the exhausting, flattening and glue scraping processes of the carbon fiber cloth are reasonably and effectively combined, so that the glue scraping operation efficiency is improved, and the glue scraping effect is improved.

The utility model relates to the technical field of train interior decoration processing, and discloses a gel coat resin spraying device for train interior decoration processing, which comprises a workbench, the upper part of the workbench is fixedly connected with a fixing frame, the upper part of the fixing frame is fixedly connected with a fixing frame, the fixing frame is internally fixedly connected with a motor, and the motor is fixedly connected with the workbench. A worm is fixedly connected to the output end of the motor, a rotating shaft is rotationally connected to the interior of the fixing frame, a worm gear is fixedly connected to one end of the rotating shaft, the worm is connected to the rear portion of the worm gear in a meshed mode, a rotating disc is fixedly connected to the bottom of the rotating shaft, and a fixing pipe is fixedly connected to one side of the rotating disc; spray heads are fixedly connected to the periphery of the outer portion of the fixing pipe. According to the spraying device, the spraying head can be conveniently driven to carry out angle adjustment, the spraying uniformity is improved, interior trim can be effectively clamped and fixed, and it is ensured that interior trim parts are kept stable in the spraying process.

A thermally curable gel coat resin composition (X) comprising an oligomeric ethylenically unsaturated resin (UR) and at least one reactive diluent (RD) wherein the oligomeric ethylenically unsaturated resin (UR) comprises at least one polyether-functional urethane (meth) acrylate (A), the polyether-functional urethane (meth) acrylate (A) can be obtained by the reaction of a mixture comprising (a) a polyfunctional isocyanate (I), (b) a hydroxyalkyl (meth) acrylate (HAA) and / or an unbranched C2-C4 polyalkylene glycol (meth) acrylate (AGA); wherein the reactive diluent (RD) comprises a monomer (B) having at least one (meth) acrylate group, and wherein the at least one polyether-functional urethane (meth) acrylate (A) comprises at least one unbranched moiety of Formula 1: wherein x is an integer from 2 to 4, n is an integer from 2 to 90.

The application discloses a kind of power vane forming die preparation methods, preparation wooden die;Preparation carbon fiber composite material suction surface shell mold: epoxy resin mold gelcoat is sprayed on the surface of wooden die of suction surface shell;According to the layer design of suction surface shell mold meat, carbon fiber fabric layer is sequentially placed on the surface of gelcoat layer;Vacuum bag film encapsulation is used to detect air tightness;According to the weight fraction of carbon fiber fabric, epoxy resin glue solution is prepared, and is injected into mold meat forming cavity;Solidification, cooling then remove and clean the forming auxiliary material on the surface of mold meat;2-5 layers of carbon fiber fabric are laid on the surface of mold meat, and pre-prepared carbon fiber composite material framework is placed, and filler is used to fill and smooth the hollow part of the framework, then 2-5 layers of carbon fiber fabric are used to cover, vacuum bag film encapsulation is used to detect air tightness, and finally epoxy resin is injected, and co-curing is shaped.The application also discloses a kind of forming die prepared by the preparation method.

The utility model belongs to the technical field of gel coat flat plate processing, and particularly relates to a fiber feeding tool for gel coat flat plate processing, which comprises a feeding tool body, the feeding tool body comprises a movable frame, a vertical frame is arranged above the movable frame, a hanging seat is arranged at the end part of the movable frame, a hanging bracket is arranged below the hanging seat, and a clamping device is arranged below the hanging bracket. A lifting assembly is arranged below the lifting frame and comprises a mounting frame, movable and adjustable lifting plates are arranged in the mounting frame, an adjusting assembly used for adjusting synchronous movement of the two lifting plates is arranged in the mounting frame, and a connecting chain is arranged at the end of each lifting plate. A bearing assembly used for bearing the rollers is arranged below the connecting chain. The limiting roller adjusting device is reasonable in design, simple in structure, convenient to machine and capable of being adjusted in a matched mode according to limiting rollers of different specifications and sizes, it is ensured that a workpiece is located in the middle position, the possibility that the workpiece shakes due to the unstable gravity center is avoided, the working progress is improved, and the use requirement is met.

The utility model belongs to the technical field of gel coat flat plate processing, especially relate to a film deviation rectifying mechanism for gel coat flat plate processing, the upper part of support frame is provided with a plurality of conveying assemblies, the conveying assembly includes the carrier plate, is equipped with the conveying roller between two carrier plates and is provided with the positioning assembly with deviation rectifying limiting function between two adjacent conveying assemblies, the multifunctional composite mechanism is provided on the conveying assembly in the middle position, the multifunctional composite mechanism includes the leveling and laying mechanism for preventing vertical jumping and the end edge limiting mechanism with limiting function to the workpiece end face. The utility model has the advantages of reasonable design, simple structure, convenient processing, and can limit the workpiece vertically on one hand, prevent it from jumping, on the other hand, can carry out a certain degree of deviation rectifying treatment to the workpiece corner, guarantee the laying work progress, ensure the tightness of cooperation between workpieces, guarantee the forming quality of workpiece, satisfy the using requirement.

The invention provides a wind power generator cabin cover production process, and relates to the field of wind power generator cabin cover molding, and the wind power generator cabin cover production process comprises the following steps: spraying a gel coat on a production mold, and curing to form a gel coat layer; auxiliary parts are arranged in the production mold; the arranged production mold is covered with a vacuum bag film and sealed; the space in the vacuum bag film is vacuumized through a flow guide pipe; a molding injection material is injected into the production mold through a glue injection guide pipe; after glue injection is finished, the extraction opening and the glue injection opening are blocked, and a vacuum environment is kept for curing; the vacuum degree is regulated and controlled in stages based on molding injection material parameters; after curing is completed, the vacuum bag film is removed; and taking out the formed cabin cover of the wind power generator from the production mold. The process requirements of different stages can be met by regulating and controlling the vacuum degree in stages, and the quality of the formed cabin cover of the wind power generator is guaranteed.

The utility model belongs to the technical field of gel coat flat plate processing, and particularly relates to a fiber edge cutting and collecting device for gel coat flat plate processing, which comprises a frame body, a conveying roller, an edge cutting roller and a collecting assembly are sequentially arranged above the frame body along the advancing direction of a workpiece, and the collecting assembly comprises a moving assembly capable of longitudinally moving and adjusting. A collecting mechanism is arranged at the outer side moving end of the moving assembly and comprises a supporting plate, a collecting roller is arranged above the supporting plate, a transition roller is arranged on one side below the collecting roller, a self-adjusting assembly is arranged below one side of the transition roller, and a limiting roller is arranged at the output end of the self-adjusting assembly. The edge cutting device is reasonable in design, simple in structure and convenient to machine, can replace manual work to complete convenient collection of materials after edge cutting, reduces labor intensity, saves labor cost, improves work progress, and fully meets use requirements.

The invention relates to the technical field of glass fiber reinforced plastic products, in particular to a processing method of a glass fiber reinforced plastic battery skin plate. According to the technical scheme, the method comprises the following steps that (1) a film base layer is arranged, specifically, a rolled film is unfolded through a flattening roller and flattened through a conveying roller, and linear conveying is conducted under the action of the conveying roller; (2) setting a gel coat, namely uniformly laying the gel coat with the corresponding color on the flattened film through a conveying frame and a transverse scraper; and (3) a resin blade coating forming step: the arranged resin is matched with a limiting assembly in the width direction, and a plate resin base layer is formed through a blade coating mode. The production process has the advantages that the integrated continuous processing effect is achieved in the production process, the continuity of product procedures in the forming process is guaranteed, it is guaranteed that the quality stability of products is better, and the texture effect of the surfaces of the products can form the composite grain effect when the cloth-based products are produced.

The utility model discloses an epoxy vinyl resin tile which comprises a tile body, and the tile body is sequentially provided with a first epoxy vinyl resin layer, a second epoxy vinyl resin layer and a third epoxy vinyl resin layer from top to bottom. A gel coat resin layer is arranged on the upper surface of the first epoxy vinyl resin layer; first glass fiber reinforced gridding cloth is arranged between the first epoxy vinyl resin layer and the second epoxy vinyl resin layer; a second glass fiber reinforced gridding cloth is arranged between the second epoxy vinyl resin layer and the third epoxy vinyl resin layer; and a polyester film layer is arranged at the bottom of the third epoxy vinyl resin layer. The gel coat resin, the glass fiber gridding cloth and the polyester film are additionally arranged between the epoxy vinyl resin layers and on the upper surface and the lower surface of the epoxy vinyl resin layers respectively, so that the heat resistance, the heat preservation performance, the waterproof performance, the structural strength and the corrosion resistance of the resin tile can be improved; meanwhile, the tile body is structurally improved, and limiting protrusions and limiting grooves are additionally arranged, so that the sealing performance of the front and back adjacent tiles is good, and falling off and displacement between the resin tiles are not prone to occurring.

The invention relates to the technical field of gel coat flat plate production, in particular to an automatic fiber roller changing device for a gel coat flat plate. The device further comprises a replacing mechanism, a splicing mechanism and a tension adjusting mechanism, the splicing mechanism and the tension adjusting mechanism are both installed on the replacing mechanism, and the conveying mechanism is installed on the tension adjusting mechanism. Glass fibers are released through the replacing mechanism and sequentially penetrate through the splicing mechanism, the tension adjusting mechanism and the conveying mechanism, the glass fibers are conveyed into a production line through operation of the conveying mechanism, meanwhile, the tension of the glass fibers is adjusted through the tension adjusting mechanism, and the stability of the glass fibers is guaranteed; after the glass fibers on the raw material roller are completely discharged, the raw material roller is replaced by the replacing mechanism, and then the glass fibers on the new raw material roller are connected with the glass fibers on the equipment through the splicing mechanism, so that a subsequent production line continuously runs, and the practicability of the equipment is improved.

The application provides a modified carbon fiber material and a preparation method thereof, and comprises the following steps: S1, dissolving a polyurethane reinforcing additive in anhydrous ethanol to obtain a first mixed solution; S2, pouring the first mixed solution into EL2 epoxy lamination resin, stirring to obtain a second mixed solution, heating the second mixed solution, and then cooling and preparing; S3, uniformly stirring GC polyester gel coating and coating the GC polyester gel coating on a mold, and standing until the surface is not sticky; S4, uniformly coating the second mixed solution on the surface of the GC polyester gel coating; S5, covering twill carbon fiber material on the GC polyester gel coating coated with the second mixed solution, and brushing a layer of modified EL epoxy resin on the twill carbon fiber material; S6, repeating step S5 at least once; S7, extruding the mold to discharge air bubbles, and brushing off the excess modified EL epoxy resin with a brush; and S8, standing and demolding to obtain the modified carbon fiber material. The modified carbon fiber material has strain rate sensitivity, and can improve the brittleness of a traditional carbon fiber material.

The application relates to the technical field of wind power generator part manufacturing, in particular to a high-adhesion wind power generator cabin cover inner layer gel coat spraying process, which comprises the following steps: base pretreatment: performing dry grinding, blowing clean dust and plasma treatment on the surface of a wind power generator cabin cover glass fiber reinforced plastic base; gel coat preparation: mixing raw materials according to a formula to obtain gel coat slurry, wherein the formula comprises modified unsaturated polyester resin, composite adhesion promoter, nano composite reinforcing filler, composite curing agent, composite promoter, defoaming agent and leveling agent; the composite adhesion promoter is composed of gamma-aminopropyl triethoxysilane and glycidyl methacrylate; and the nano composite reinforcing filler is a nano powder with a surface modified by a silane coupling agent; the composite adhesion promoter compound system is adopted, the nano composite reinforcing filler and the organic modifier are matched to construct a multi-element composite modified structure, and the interface bonding capacity of the gel coat and the glass fiber reinforced plastic base is fundamentally strengthened.

The invention relates to the technical field of resin raw material processing, and particularly discloses drying treatment equipment for styrene-free gel coat resin raw materials, which comprises a frame and a cross beam, the cross beam is mounted in the middle of the frame, and a plurality of limiting clamps are mounted on the left and right sides of the upper surface of the frame and the upper surface of the cross beam at equal intervals from front to back; the limiting clamps limit the water-cooled plastic strips, and a drying mechanism is installed on the upper surface of the frame and located above the cross beam. Stubborn water drops on the surface of a plastic strip can be efficiently vibrated off, primary water removal of the plastic strip is completed, the pressure of a subsequent air drying link is effectively shared, the air drying time is greatly shortened, and the overall production efficiency of gel coat resin particles is remarkably improved; dynamic adjustment of the air blowing angle is achieved, the air blowing range of the air knife is effectively expanded, the air knife is matched with the curved surface structure characteristics of the plastic strips, air drying dead angles are eliminated, comprehensive and uniform drying of the plastic strips is achieved, and it is ensured that the humidity of gel coat resin particles obtained after the dried plastic strips are cut into particles reaches the standard and meets the use standard.

The application provides a solid glue coating, a preparation method and application thereof, and a preparation method of a surface-coated composite material, and belongs to the technical field of functional materials.The solid glue coating provided by the application comprises the following preparation raw materials in mass fractions: 50-95 parts of base resin powder, 1-20 parts of graphene oxide-nano titanium dioxide composite material, 1-20 parts of barium sulfate, 0.1-10 parts of a curing agent, 0.01-5 parts of a defoaming agent, and 0.01-5 parts of a wetting and leveling agent.The solid glue coating provided by the application is a high-thermal-conductivity and high-fluidity composite resin powder, can be coated on the inner surface of a mold in the forming stage of a composite material product, and is heated and solidified together with a composite material matrix, wherein the solid glue coating forms a uniform, smooth and dense coating on the surface of the composite material matrix, is perfectly fused with the composite material matrix, and thus an integrally-formed surface-coated composite material is obtained, and the operation is simple and environment-friendly.

The application provides a wind power generator cabin production process and relates to the field of wind power generator cabin forming. The process comprises the following steps: spraying glue on a production mold and curing to form a glue layer; arranging auxiliary components in the production mold; covering a vacuum bag film on the production mold after the arrangement is completed and sealing; performing a vacuumizing operation on the space in the vacuum bag film through a flow guide pipe; injecting a forming injection material into the production mold through a glue injection pipe; plugging the air outlet and the glue injection port after the glue injection is completed, maintaining a vacuum environment, and curing; controlling the vacuum degree in stages based on the parameters of the forming injection material; removing the vacuum bag film after the curing is completed; and taking out the formed wind power generator cabin from the production mold. The application can adapt to the process requirements of different stages by controlling the vacuum degree in stages, so as to ensure the quality of the formed wind power generator cabin.

The utility model discloses a glue spraying mechanism of a wind power blade automatic cloth paving device, which comprises a first rack, the upper end of the first rack is provided with a turnover mechanism, the turnover mechanism comprises a first driving motor, a first mounting rack and a second mounting rack, the first mounting rack is used for being mounted on a hoist, and the second mounting rack is used for being mounted on a second hoist; the first driving motor is arranged at the right end of the first mounting frame, the second mounting frame is arranged at the upper end of the first rack, the first mounting frame and the second mounting frame are connected through a first rotating shaft, and the first driving motor is in driving connection with the first rotating shaft; and the glue spraying mechanism is arranged at the right lower end of the first rack. According to the glue spraying mechanism of the automatic cloth paving device for the wind power blade, the fifth servo electric cylinder drives the second sliding table base to do reciprocating motion, and meanwhile, the sixth servo motor extrudes the first pressurizing spray head, so that the first glue coating tank sprays a glue coating through the first glue spraying opening, and the glue coating is uniformly sprayed to a wind power blade mold cavity.

The invention relates to the technical field of glass fiber reinforced plastic products, in particular to a glass fiber reinforced plastic battery skin plate. The technical scheme adopted by the invention is as follows: the film is processed by the following method: an integrated continuous device is adopted for uninterrupted processing in the processing process, and the method comprises the following steps: 1) setting a film base layer: a roll-shaped film is unfolded by a flattening roller and is flattened by a conveying roller, and linear conveying is performed under the action of the conveying roller; (2) setting a gel coat, namely uniformly laying the gel coat with the corresponding color on the flattened film through a conveying frame and a transverse scraper; and (3) scraping and forming the resin. The invention has the advantages that: integrated continuous processing is realized, the continuity of product procedures in the forming process is ensured, the quality stability of the product is better, the texture effect of the surface of the product can form a composite texture effect when a cloth-based product is produced, the mechanical property of the product can be obviously improved, and the production cost is reduced. And the durability is higher.

The invention provides an epoxy gel coat composition and a preparation method and application thereof.The epoxy gel coat composition comprises a first part and a second part, and the first part comprises epoxy resin, filler, a defoaming agent, a thixotropic agent, a wetting dispersant and a first solvent; the second part comprises an aromatic amine curing agent, an accelerant and a second solvent; and the weight ratio of the first part to the second part is 100: 20 to 100: 50. The epoxy gel coat composition specially designed by the invention has excellent high temperature resistance, excellent polishing performance and excellent collision damage resistance.

The invention discloses a preparation method of a sealing bearing plate, and belongs to the technical field of composite materials, the preparation method comprises the following steps: S100, preparing a polyhedral core body; s200, the mold is assembled according to the size of the sealing bearing plate needing to be prepared, and the size of an inner cavity of the mold is made to be consistent with the size of the sealing bearing plate; s300, the surface of the inner cavity of the mold is coated with a release agent, a surfacing mat is laid, a gel coat resin layer is sprayed to form a gel coat layer, and then a composite reinforcing layer is laid; s400, the polyhedral core bodies are combined and stacked in the mold cavity in the plane direction and the thickness direction, splicing and staggering are conducted in the thickness direction to form a three-dimensional network structure, and a composite reinforcing layer covers the three-dimensional network structure; s500, the mold cavity is sealed; and S600, air in the mold cavity is extracted, resin is introduced, and the resin and the polyhedral core body are cured and formed. Through the three-dimensional stacking design of the polyhedral core body and the sandwich structure mode of cooperative supporting of the high-strength composite surface layer, the bearing plate obtains enough and even better bearing capacity than a traditional material while reducing the self weight of the structure.

The application relates to a bridge anti-collision technology field, in particular to a composite fender manufacturing method, which comprises the following steps: cleaning a mold and coating a release agent, coating a gel coat after the release agent is dried; laying dry fiber reinforced material, sandwich material, release cloth, flow guide cloth, flow guide pipe and air guide pipe on the mold in sequence; then laying a vacuum bag and an inflation bag, and checking air tightness; vacuumizing the vacuum bag, introducing resin glue solution into the flow guide pipe, simultaneously vibrating and heating the mold until the resin glue solution completely soaks the mold; after complete soaking, inflating and pressurizing the inflation bag, and compacting the fiber reinforced material to the mold; after the resin glue solution is solidified, removing the vacuum bag and the inflation bag, and obtaining the composite fender from the mold. The application can keep the temperature of the resin glue solution and the mold consistent by inflating and pressurizing the inflation bag, heating the resin glue solution and the mold, and can avoid the problems of too low local glue content of the fiber reinforced material, uneven overall thickness of the prefabricated part and fiber layering.

The invention discloses a resin glass fiber polymer anticorrosive plate and a preparation method thereof, and belongs to the field of polymer anticorrosive plate preparation, the resin glass fiber polymer anticorrosive plate comprises a base material and a protective layer on the surface of the base material; the base material comprises vinyl resin, alkali-free glass fiber and a curing agent, and the surface of the base material is subjected to polarity modification through an ethylene-vinyl acetate copolymer; the protective layer is prepared from isophthalic acid / neopentyl glycol type unsaturated polyester gel coat resin, a triethanolamine borate modified Mo / S / Ce compound, isocyanate modified fibrous attapulgite, a silane coupling agent, an initiator and a cross-linking agent. The problems that due to the fact that the glass fibers are added, the surface roughness of the surface of the base material is increased, and the high abrasion rate is likely to be generated in the using process are solved.

The invention relates to the technical field of composite material preparation, particularly discloses a preparation method of a glass fiber reinforced plastic outer protective layer for a low-temperature medium conveying pipeline, and aims to solve the technical bottlenecks of a traditional metal or glass fiber reinforced plastic outer protective layer in the aspects of low-temperature adaptability, corrosion resistance and manufacturing efficiency. The method comprises the steps that glass cloth and a single-component light-cured resin system are adopted, the surface of a pretreated pipeline is subjected to annular winding forming, then rapid curing is achieved through ultraviolet light irradiation, an anti-aging gel coat is sprayed on an original station, secondary curing is conducted, and finally the method is completed. According to the technical scheme, the axial tensile strength and the structural stability of the outer protective layer can be remarkably improved, the service life is prolonged to 15-25 years, the production efficiency is improved by 62.5%, the production capacity per day reaches 6-9 pieces, and meanwhile the comprehensive cost is reduced by 40-50%.

The present invention relates to a forming method and application of a carbon fiber sandwich structure, and belongs to the technical field of composite material forming. The forming method comprises: spraying a gel coat on the forming surfaces and parting seams of an upper mold and a lower mold; after the gel coat is cured, applying an outer layer of epoxy resin liquid material on the surface of the gel coat, and then laying a carbon fiber cloth on the outer layer of epoxy resin liquid material, with the edge of the carbon fiber cloth located in the parting seam; mechanically processing to obtain a foam material inner core, and processing a plurality of through holes perpendicular to the surface of the foam material inner core on the surface of the foam material inner core; after applying an inner layer of epoxy resin liquid material on the surface of the foam material inner core, placing the foam material inner core between the upper mold and the lower mold, closing the mold and heating; demolding and polishing the parting seam of the product. Compared with conventional carbon fiber sandwich structures, since the glue injection pipeline is eliminated and the upper and lower forming molds are used for the preparation, the surface of the special-shaped structure can be formed smoothly. The front, back and surrounding inside of the structure with uneven thickness can all have the surface quality of the appearance surface.

The invention discloses an integrated forming method for a large-section prefabricated body and a thin-wall box body, is used for solving the problem that cracks are likely to occur when a prefabricated part is bonded in the prior art, and belongs to the technical field of packaging box forming. The method comprises the following steps: S1, spraying a gel coat; gel coat spraying is carried out on the working surface of the box body mold, and a position is reserved for a box body male mold prefabricated body; s2, paving a surfacing mat and a chopped strand mat at the prefabricated part, namely, after the gel coat is cured, paving a layer of surfacing mat at the position of the box male mold prefabricated part, spraying resin, and then paving a layer of chopped strand mat; s3, basalt fiber cloth is laid on the prefabricated part; s4, foam is laid on the prefabricated part; s5, basalt fiber cloth is laid on the prefabricated part for the second time; s6, a surfacing mat and a chopped strand mat are laid on the whole box body; after the prefabricated part is paved, immediately paving a layer of surfacing felt on the whole box body grinding tool, spraying resin, and then paving a layer of chopped strand mat; s7, the embedded parts are bonded; s8, basalt fiber cloth is laid on the whole box body; and S9, mold closing and glue injection.

The invention discloses a preparation method of a composite material high-temperature mold based on 3D printing, which comprises the following steps: firstly, blending fibers and resin, and preparing to obtain composite material granules; the mold digital model is preprocessed, and a gel coat forming area is reserved; a composite material mold is prepared based on 3D printing, and the composite material mold is placed in a drying oven to be subjected to stress relief aging treatment; the surface of the composite material mold is subjected to sand blasting treatment, the surface of the composite material mold is coated with a gel coat, and a gel coat layer is formed; when the gel coat is not cured, the composite material mold is placed in an ultrasonic resonance device, and the gel coat diffuses into interlayer cracks of the composite material mold along with vibration; and after the gel coat layer is cured, the composite material high-temperature mold is obtained. According to the method, the uncured liquid gel coat is vibrated and diffused into the interlayer cracks of the composite material mold by adopting an ultrasonic resonance method, so that the air tightness of the surface of the mold is effectively improved, the air tightness problem caused by thermal expansion of the mold in a high-temperature use environment is effectively solved, and the method has relatively good practicability.

The invention relates to the technical field of wind driven generator part manufacturing, in particular to a high-adhesive-force wind driven generator cabin cover inner layer gel coat spraying process which comprises the following steps: base body pretreatment: carrying out dry grinding, dust blowing and plasma treatment on the surface of a wind driven generator cabin cover glass fiber reinforced plastic base body; preparing a gel coat: mixing raw materials according to a formula to obtain gel coat slurry, and the formula comprises modified unsaturated polyester resin, a composite adhesion promoter, a nano composite reinforcing filler, a composite curing agent, a composite accelerant, a defoaming agent and a flatting agent, the composite adhesion promoter is composed of gamma-aminopropyltriethoxysilane and glycidyl methacrylate, and the nano composite reinforcing filler is nano powder of which the surface is modified by a silane coupling agent; according to the invention, a composite adhesion promoter compounding system is adopted, and the nano composite reinforcing filler and the organic modifier are matched to construct a multi-component composite modified structure, so that the interface bonding capacity of the gel coat and a glass fiber reinforced plastic matrix is fundamentally enhanced.