85 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 discloses gel coat spraying equipment for surface treatment of a cabin cover of a wind power generator in the technical field of gel coat spraying. The gel coat spraying equipment comprises a base, a spraying structure is mounted on the base, a driving mechanism is mounted on the base, and a rotating mechanism is mounted above the driving mechanism; the spraying structure comprises a rack, and a guide rail is mounted at the bottom of the rack; a limiting ring is arranged at the bottom of the adjusting frame; fulcrums at the two ends of the top of the first shear fork frame are slidably arranged in the guide rails, and the bottom of the tail shear fork frame is rotatably arranged in the limiting ring; the nozzles are rotationally arranged at the central hinge points of the shear fork frames; spraying a cover; a shutter; the adjusting mechanism is used for driving the spraying cover to axially move along the nozzle and also used for driving the flashboard to rotate to change the overlap ratio of the flashboard and the feeding end of the nozzle; the linear motion and rotation of the spraying structure are combined, and the glue outlet amount and range of the nozzle are changed, so that the equipment can spray the end surface of the mold at one time, and the problems of non-uniform and non-uniform gel coat curing degree caused by repeated replacement of the equipment are avoided.

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 relates to a glass fiber reinforced plastic continuous production line and a production method, and relates to the field of glass fiber reinforced plastic production equipment.The glass fiber reinforced plastic continuous production line comprises a bottom film feeding and gluing unit, a lower surface mat laying and gluing mechanism, an upper-layer fiber laying and infiltrating mechanism, a glue supplementing and laminating unit, a heating and curing unit and a trimming and cutting unit; the bottom film feeding and gluing unit is used for guiding a bottom film and blade-coating a layer of gel coat on the bottom film, the lower surfacing mat laying and gluing mechanism is used for laying a lower surfacing mat on the gel coat and coating resin glue on the lower surfacing mat, the upper-layer fiber laying and infiltrating mechanism is used for laying a main fiber layer and an upper surfacing mat on the lower surfacing mat and infiltrating the resin glue, and the lower-layer fiber laying and infiltrating mechanism is used for laying the main fiber layer and the upper surfacing mat on the upper-layer fiber laying and infiltrating the resin glue. The glue supplementing and laminating unit supplements resin glue on the upper surfacing mat and then paves a top film, the top film is output after being heated and cured by the heating and curing unit and trimmed and cut by the trimming and cutting unit, and the quality of glass fiber reinforced plastic products can be guaranteed. The invention further discloses a glass fiber reinforced plastic continuous production method.

The utility model discloses a hydrophobic wind turbine blade protective coating, which relates to a protective coating. It comprises a substrate, a layer of polyester pore-filling putty is compounded on the surface of the substrate, a layer of polyurea gel coat is compounded on the surface of the polyester pore-filling putty, a layer of ultra-light epoxy glass flake paint is compounded on the surface of the polyurea gel coat, a layer of elastic polyurethane hydrophobic topcoat is compounded on the surface of the ultra-light epoxy glass flake paint, and a layer of solvent-free polyurethane varnish is compounded on the surface of the elastic polyurethane hydrophobic topcoat. The utility model has a reasonable structure, and the coating body is a multi-layer structure, which not only has good hydrophobic performance, but also the base layer can be quickly solidified during construction, which is convenient for post-spraying, and has heat preservation and anti-corrosion properties.

The utility model relates to a washing tower which comprises a washing tower body and a washing tower shell, the washing tower shell comprises a glass fiber reinforced plastic layer and a reinforcing layer which are sequentially arranged from outside to inside, and the glass fiber reinforced plastic layer is provided with a protection piece used for preventing ultraviolet rays. The use of glass fiber reinforced plastics is effectively reduced, the reduction of the manufacturing cost is facilitated, meanwhile, the ultraviolet-proof gel coat is arranged on the outer surface of the glass fiber reinforced plastic layer, so that the irradiation of ultraviolet rays to the PP plate layer through the glass fiber reinforced plastic layer can be effectively reduced, and the aging risk of the PP plate layer is reduced; the risk that the washing tower shell is layered and fractured due to expansion caused by heat and contraction caused by cold can be effectively reduced, so that the service life of the washing tower is prolonged.

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 provides a gel coat counter basin capable of resisting fingerprints and water stains, and belongs to the field of bathroom accessories. The problems that after an existing gel coat counter basin is used for a long time, fingerprints and water spots are likely to be generated, and the attractiveness and the use experience are affected are solved. A gel coat counter basin capable of resisting fingerprints and water stains comprises a counter basin body, a counter basin body used for washing is arranged on the counter basin body, a counter basin plate used for placing articles is connected to the periphery of the counter basin body, a plurality of detachable frames are arranged on the periphery of the counter basin plate, the frames are connected through bolts, a mounting groove is formed in the counter basin plate, and the counter basin plate is connected with the mounting groove through bolts. A plurality of sliding rail grooves are formed in the mounting groove, a matte plate is arranged on the mounting groove, a plurality of sliding blocks corresponding to the sliding rail grooves are arranged at the bottom end of the matte plate, and the matte plate can be disassembled and assembled in a pulling mode. The utility model has the advantages of fingerprint and water stain resistance, attractive appearance and good experience feeling.

The present invention relates to the field of glass fiber reinforced plastics (FRP) technology, and more specifically, to a special gel-coated FRP sheet, a preparation method, and a production line. The special gel-coated FRP sheet comprises a base film, a transparent gel-coat layer, and a functional gel-coat layer, wherein the transparent gel-coat layer is located between the base film and the functional gel-coat layer. The transparent gel-coat layer comprises a thermosetting acrylic-modified unsaturated polyester resin and a photoinitiator, while the functional gel-coat layer comprises a thermosetting acrylic-modified unsaturated resin. The transparent gel-coat layer protects the functional gel-coat layer and significantly improves the corrosion resistance, aging resistance, and scratch resistance of the special gel-coated FRP sheet. The method and production line can achieve rapid and continuous production of FRP sheets, effectively improving production efficiency.

The utility model relates to the technical field of artificial stone product production, and discloses an artificial stone product forming production line which comprises gel coat spraying equipment, mold closing equipment, forming equipment and demolding equipment which are arranged in sequence, the production line further comprises a conveying line, the conveying line sequentially passes through the gel coat spraying equipment, the mold closing equipment, the forming equipment and the demolding equipment, the conveying line comprises a conveying frame and a conveying moving part, the conveying moving part is used for bearing a mold, a conveying rail is arranged on the conveying frame, and the conveying moving part is arranged on the conveying rail and can move along the conveying rail. The mold conveying device has the beneficial effects that the time consumed for conveying the mold among equipment is saved, the overall production time is shortened, and the production efficiency is improved.

To provide use of various types of wind power generation blades of a resin composition which enables formation of a reading edge protective agent that has little labor for construction, can avoid lowering of aerodynamic characteristics and is excellent in erosion resistance, as a reading edge protective agent.SOLUTION: There is provided use of a wind power generation blade of a resin composition containing an urethane resin having an urethane structure and a carbonate structure in the same molecule as a gel coating / reading edge protective agent.SELECTED DRAWING: Figure 1

The utility model discloses a novel glass fiber reinforced plastic gel coat pipeline, and relates to the technical field of glass fiber reinforced plastic gel coat pipelines, the novel glass fiber reinforced plastic gel coat pipeline comprises glass fiber reinforced plastic pipelines, two ends of the glass fiber reinforced plastic pipelines are respectively provided with a first butt-joint assembly and a second butt-joint assembly, and the two glass fiber reinforced plastic pipelines realize rapid butt-joint operation through the first butt-joint assembly and the second butt-joint assembly; the first butt joint assembly comprises a butt joint unit and a sealing unit. Through the arrangement of the first butt joint assembly and the second butt joint assembly and the horn mouth structure of the positioning clamping groove, when the two glass fiber reinforced plastic pipelines are in butt joint, the positioning clamping groove and the positioning convex block do not need to be kept in an accurate alignment state and only need to be approximately aligned, so that the splicing construction difficulty can be reduced, and the splicing construction efficiency is improved. And through clamping connection of the positioning protruding blocks and the positioning clamping grooves, automatic alignment and alignment limiting of the first through holes and the second through holes can be achieved, so that installation of bolts is facilitated, and the installation efficiency of the glass fiber reinforced plastic pipeline is effectively improved.

The utility model relates to the technical field of glass fiber reinforced plastic anti-skid plate gluing, in particular to a glass fiber reinforced plastic anti-skid plate gel coat layer blade coating mechanism which can effectively improve the strength of a gel coat layer of a glass fiber reinforced plastic anti-skid plate after bubbles in unsaturated polyester resin are vibrated out, and is good in practicability. Comprising a rack and a model tank, and the model tank is horizontally mounted on the rack; the device further comprises synchronous wheel assemblies, two synchronous belts, two sliding tables, a cross beam, a scraping plate, a cross rod and a plurality of vibrating bars, the synchronous wheel assemblies are rotationally installed on the left side and the right side of the rack, the synchronous wheel assemblies are sleeved with the two synchronous belts correspondingly, and the two synchronous belts are located on the left side and the right side of the model groove correspondingly; the two sliding tables are connected with the upper portions of the two synchronous belts respectively, the two ends of the cross beam are connected with the two sliding tables respectively, the scraping plate is horizontally installed below the cross beam, the front edge and the rear edge of the scraping plate are both provided with the guide inclined plates, the cross rod is horizontally installed on the cross beam, the multiple vibration rods are vertically installed on the cross rod, and the lower ends of the multiple vibration rods stretch into the model groove.

The invention provides a gelcoat composition comprising boron nitride nanosheets dispersed in a curable liquid carrier comprising a thermosetting resin, wherein the boron nitride nanosheets have an average particle size of between 0.6 µm and 10 µm.

The invention provides a modified carbon fiber material and a preparation method thereof, and the preparation method comprises the following steps: S1, dissolving a polyurethane reinforcing aid in absolute ethyl alcohol to obtain a first mixed solution; s2, pouring the first mixed solution into EL2 epoxy laminated resin, stirring to obtain a second mixed solution, heating the second mixed solution, and airing for later use; s3, uniformly stirring the GC polyester gel coat, coating the mold with the GC polyester gel coat, and standing until the surface is not sticky; s4, uniformly coating the second mixed solution on the surface of the GC polyester gel coat; s5, covering the GC polyester gel coat coated with the second mixed solution with a twill carbon fiber material, and brushing a layer of modified EL epoxy resin on the twill carbon fiber material; s6, repeating the step S5 for at least one time; s7, extruding the mold to discharge bubbles, and brushing off redundant modified EL epoxy resin by using a brush; and S8, standing and demolding to obtain the modified carbon fiber material. The modified carbon fiber material has strain rate sensitivity, and meanwhile, the brittleness of a traditional carbon fiber material can be improved.

The invention discloses a high-wettability and high-covering-power color paste, which is prepared from the following raw materials: polyester resin and toner, and the Mohs hardness of the toner is 2-5. The vacuum infusion resin and the color paste are mixed according to the proportion of 98: 2, so that the vacuum infusion product has a certain appearance color, the use of coatings (paint and gel coat) is reduced, and the cost of the vacuum infusion product is greatly reduced. According to the invention, zinc sulfide with Moh's hardness of 3, brightness of 98 and average particle size of 0.35 [mu] m is adopted as the toner, so that friction between the toner and the glass fiber can be reduced, and influence on physical properties of a final product is reduced. The bonding degree among the resin, the color paste and the glass fiber can be improved, so that the effect of providing certain coating appearance protection for the glass fiber reinforced plastic product without influencing the strength of the product is achieved.

The 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 the following steps: spraying gel coats on forming surfaces and parting seams of the upper mold and the lower mold; after the gel coat is cured, the surface of the gel coat is coated with an outer-layer epoxy resin liquid material, then carbon fiber cloth is laid on the outer-layer epoxy resin liquid material, and the edge of the carbon fiber cloth is located in the parting seam; a foam material inner core is obtained through machining, and a plurality of through holes perpendicular to the surface of the foam material inner core are machined in the surface of the foam material inner core; brushing an inner layer epoxy resin liquid material on the surface of the foam material inner core, putting the foam material inner core between an upper mold and a lower mold, closing the mold and heating; and demolding and polishing the parting seam of the product. Compared with a conventional carbon fiber sandwich structure, a glue injection pipeline is eliminated, and upper and lower forming molds are used for mold closing preparation, so that smooth surface forming of a special-shaped structure can be realized. And the front surface, the back surface and the peripheral inner surface of the structure with the non-uniform thickness have the surface quality of an appearance surface.

The utility model relates to the technical field of Dewar containers, and discloses a composite material Dewar container containing liquid nitrogen, which comprises a Dewar tank, the Dewar tank comprises an inner layer, a first vacuum layer and an outer layer from inside to outside, an annular groove is arranged in the middle of the upper surface of the Dewar tank, and a sealing ring gasket is fixedly connected with the inner wall of the annular groove. When the Dewar container containing the liquid nitrogen is used, the weight is reduced, the corrosion resistance and the low-temperature resistance are better due to the fact that the composite material glass fiber reinforced plastic is adopted, gas leakage and external pollution are effectively prevented through the design of the blanking cap and the sealing ring gasket, the sealing performance of the container is improved, and the service life of the container is prolonged. Through the design of the double vacuum layers of the first vacuum layer and the second vacuum layer and the cooperation of the gel coat, the effect of sealing tiny holes and defects can be achieved, the heat insulation effect is further enhanced, heat conduction is reduced, the retention time of liquid nitrogen is longer, and energy loss is reduced.

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 utility model discloses a fermentation tank cover plate which is provided with a bottom supporting plate, a water tank piece is fixed on the bottom supporting plate, a water tank is arranged on the top surface of the water tank piece, a cover plate is arranged in the water tank in a supporting manner, and the top surface of the cover plate is arranged in an arc shape; the cover plate is of a multi-layer structure and comprises an outer gel coat, a glass fiber surface layer, a heat preservation layer and a glass fiber inner layer, and the outer gel coat is made of food-grade resin. As a whole, the device disclosed by the utility model can be moved integrally and is convenient to operate. And in the process of putting the fermented grains into and out of the cellar, the workload of mud covering and mud dredging is greatly saved. The cover plate made of glass fiber reinforced plastic is integrally formed, the strength is effectively improved, and the cover plate can bear the pressure generated by anaerobic fermentation. The water tank is arranged on the edge of the cellar opening, water is discharged into the water tank when the cover plate is put into use, and when excessive gas generated by fermentation in the cellar increases the internal pressure of the cover plate, the gas can be released to the outside in a bubble manner from the water tank on the edge of the cellar.

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.