285 results about "Retting" patented technology

The present invention provides a glue dipping machine, and relates to the technical field of glue dipping machines. The glue dipping machine comprises a machine body, a glue spraying side frame is fixedly connected to the left side of the machine body, a reciprocating glue spraying machine is arranged on the upper part of the glue spraying side frame, and a conveying device is arranged inside the glue spraying side frame; a third spiral lifter is arranged on the upper surface of the machine body and located on the left side, a feed roller is arranged at the output end of the third spiral lifter, and an auxiliary roller is arranged inside the machine body and located on the left side. The latex and silicone are fully mixed by the reciprocating glue spraying machine, and then the reciprocating glue spraying is performed, and then the latex and silicone can be fully entered through the extrusion of the feed roller and the auxiliary roller, so that the processed finished product can be exposed to the sun and boiled in water, and the service life is longer, and there is no need to provide a vacuum environment. After processing, the fiber layer contains more glue. After dipping, the excess glue is squeezed twice to reduce the waste of glue, and the final finished product has a better bonding effect.

The invention discloses a method for preparing hydrophobic SiO2 aerogel through in-situ polymerization. The method comprises the following steps: (1) uniformly mixing and stirring an alcohol solvent, a silicon source, water, an in-situ modifier and a catalyst to obtain a mixed solution; (2) adding an acid adjusting solution into the obtained mixed sol solution to hydrolyze the mixed sol solution, and adding an alkali adjusting solution to polymerize the mixed sol solution; (3) gum dipping: dipping the silica sol solution into the inorganic fiber material through a gum dipping process to obtain a compound of the silica sol and the inorganic fiber material, and standing to obtain a gel composite material; (4) aging: adding the obtained composite gel material into an aging liquid mixed solution; and (5) immersing the aged wet gel in an organic solvent, and then feeding into a supercritical drying kettle for supercritical drying treatment to obtain the SiO2 aerogel composite material. By adopting an in-situ polymerization method, the use of a hydrophobic modifier is reduced, the aerogel preparation process period is shortened, and the production process is simple.

The invention discloses a vacuum-assisted pultrusion preforming device for a composite material. The vacuum-assisted pultrusion preforming device comprises a yarn threading plate, a gum dipping tank, a gum extruding roller and a vacuum-assisted preforming mold which are sequentially arranged in the pultrusion direction, wherein fiber bundles penetrate through the yarn threading plate in a layered mode, the gum dipping tank is used for containing resin, and the gum extruding roller is used for extruding redundant resin. The vacuum auxiliary preforming mold is provided with a preforming mold cavity, a vacuum cavity is formed in one section of the preforming mold cavity of the vacuum auxiliary preforming mold, an air exhaust hole is formed in the upper portion of the vacuum cavity, and a semi-permeable membrane allowing gas to pass through but blocking resin to pass through is arranged at the air exhaust hole. And the air exhaust hole is externally connected with a vacuumizing device. The vacuum-assisted pultrusion preforming device can effectively discharge microbubbles in resin and fiber bundles, effectively control uniform distribution of the content of the resin and remarkably promote full infiltration of high-viscosity resin to fibers.

The invention provides a method for improving the anti-cracking performance of a special recombined material for independent liquid cargo tanks of LNG, LPG and LEG ships. The method comprises the steps that wood is rotationally cut into single plates with the thickness being 1.8-3.0 mm; the veneer is subjected to heat-moisture treatment, first drying, gum dipping and second drying; the second drying means that the moisture content of the impregnated veneer reaches 5-8%; after reinforcing materials are dispersed on the upper surfaces of the impregnated veneers, assembling, hot pressing and balancing are conducted; the reinforcing material is located between the adjacent impregnated veneers, and the reinforcing material comprises a fiber material with the average diameter of 5-8 microns and / or nano particles with the average particle size of 10-50 nm. By means of the method, the cracking rate of the interior or the glue layer of the special recombined material veneer can be effectively reduced.

The utility model discloses a novel gum dipping device for a prepreg machine, and belongs to the technical field of carbon fiber prepreg cloth processing equipment. The technical problems that in the prior art, an impregnation device is not high in impregnation uniformity and stability, product quality and production efficiency are affected, and environmental pollution is large are solved. The device comprises a bottom platform support, a hot melt glue device and a glue dipping roller device, the hot melt glue device and the glue dipping roller device are matched with each other, and the glue dipping roller device is arranged on the bottom platform support and comprises a driving glue dipping heating roller and a driven glue dipping heating roller which are symmetrically arranged in parallel. One end of the driving impregnation heating roller and one end of the driven impregnation heating roller are controlled by a synchronous gear set to synchronously and relatively move; the front and rear sides of the driving impregnation heating roller and the driven impregnation heating roller are respectively connected with glue blocking plates, and the upper space between the driving impregnation heating roller and the driven impregnation heating roller is encircled into an impregnation pool through the glue blocking plates on the front and rear sides; and a group of glue melting devices are symmetrically arranged above the glue dipping pool and above the driving glue dipping heating roller and the driven glue dipping heating roller respectively.

The invention relates to the technical field of industrial prepreg production equipment, and particularly discloses a tension control method for ceramic-based composite material fiber tows, the ceramic-based composite material fiber tows are laid and impregnated through a fiber arrangement machine, and the fiber arrangement machine comprises an unwinding roller for unwinding the fiber tows and a take-up roller for taking up the fiber tows. Tension balance of the fiber tows in the fiber arranging machine in the fiber arranging process and the fiber collecting process is achieved by controlling the rotating speed of the unwinding roller and the rotating speed of the fiber collecting roller. The servo motor is adopted to replace a magnetic powder brake to control tension, and the problem that the tension smaller than the resistance range cannot be controlled due to the fact that the resistance of the magnetic powder brake is large is effectively solved; the unwinding roller and the take-up roller are both controlled by servo motors, a double-closed-loop control mode is adopted, tension control is achieved by adjusting the speed difference of the unwinding roller and the take-up roller, the tension control range is widened, stability is better, resistance influence factors are avoided, and the signal oscillation problem caused by one-way control is optimized.

The invention discloses an energy-saving and environment-friendly aramid cord thread dipping solution and a rubber material, and belongs to the technical field of dipping solutions. The gum dipping solution comprises a first-bath gum dipping solution and a second-bath gum dipping solution which are subpackaged; wherein the first-bath impregnation liquid is prepared from the following raw materials in parts by weight: 5 to 25 parts of blocked isocyanate, 2 to 15 parts of flexible polyfunctional epoxy resin and 100 parts of deionized water; the second-bath impregnation liquid comprises the following raw materials in parts by weight: 50-250 parts of latex, 5-25 parts of phenolic resin and 100 parts of deionized water; the energy-saving and environment-friendly aramid cord thread dipping solution has good water solubility and water dispersibility, is not easy to stick to a roller, is convenient to clean, does not contain extremely polluting components, and is environment-friendly. The adhesive property between an aramid fiber product (such as an aramid cord) treated by the impregnation liquid and a rubber matrix is excellent, and the durability of a rubber composite material is improved.

The invention discloses roll-to-roll gum dipping and rolling integrated equipment, which relates to the technical field of fuel cell production and comprises an unwinding system, a gum dipping system, a drying system, a continuous rolling system and a winding system which are connected in sequence, wherein the unwinding system is used for unwinding a carbon fiber paper raw paper coiled material and outputting a material belt; the glue dipping system is used for dipping the material belt with glue slurry; the drying system is used for drying the sizing material slurry loaded on the material belt; the continuous rolling system is used for adjusting the thickness of the sizing material cured on the material belt; and the winding system is used for rewinding the material strip to form the carbon fiber paper glue-carrying coiled material. According to the device, the carbon fiber paper raw paper coiled material can be continuously subjected to gum dipping, drying and hot rolling processing, a gum material can be uniformly distributed on a material belt, the defects of the surface layer of the gum material are reduced, and the overall production efficiency and production quality of the carbon fiber paper can be effectively improved.

The invention discloses a glass fiber dipping device, which belongs to the field of glass fiber processing, and comprises a dipping box body, two sides of the upper surface of the dipping box body are rotatably connected with first guide rollers, and two sides of the inner surface of the dipping box body are rotatably connected with second guide rollers; a monitoring assembly used for monitoring the height of the liquid level in the dipping box body is arranged on one side of the dipping box body, and a tightness adjusting assembly is arranged in the middle of the front side and the rear side of the inner surface of the dipping box body. According to the glass fiber conveying device, conveying can be achieved, glass fibers can become loose gradually, the extrusion force of the glass fibers on the connecting roller becomes small, a coil spring can drive a rotating plate to rotate reversely by a certain angle, and a driving groove drives the connecting roller to expand towards the periphery gradually in the rotating process and tighten the loose glass fibers; the glass fibers are effectively ensured to be always in a tight state in the impregnation box body, the glass fibers are ensured to be conveyed more smoothly, the impregnation of the glass fibers is ensured to be more uniform, and the impregnation quality of the glass fibers is improved.

The invention discloses a glass fiber impregnation device, and belongs to the field of glass fiber production, the glass fiber impregnation device comprises a heating impregnation box, first guide rollers are arranged on the two sides of the upper surface of the heating impregnation box, second guide rollers are symmetrically and rotatably connected to the front side and the rear side of the inner surface of the heating impregnation box, and a supporting frame is fixedly connected to one side of the heating impregnation box. A glue scraping assembly for preventing a glue solution from being adhered to the bottom in a layered manner is arranged in the middle of the front and rear sides of the inner surface of the heating impregnation box, and the glue scraping assembly comprises a first supporting plate fixed in the middle of the front and rear sides of the inner surface of the heating impregnation box and second supporting plates fixed on the front and rear sides of the inner surface of the heating impregnation box. The first driving motor can drive the moving frame to circularly reciprocate at the inner bottom of the heating impregnation box through transmission, the bottom of a glue solution can be stirred, the glue solution adhered to the inner bottom of the heating impregnation box can be stirred, the glue solution is more uniform, layering is avoided, and the glue solution can be heated more uniformly.

The utility model discloses an impregnation system for a resin-fiber pultrusion composite material, which comprises a pressure chamber and a matched cover plate, the pressure chamber is enclosed by a bottom plate, a first wall plate, a third wall plate, a first side plate and a second side plate, and the first wall plate and the third wall plate are distributed at the left end, the right end, the front end and the rear end of the bottom plate; a second wallboard is arranged to divide the pressure chamber into a first pressure chamber and a second pressure chamber, a prefabricated mold is installed on the second wallboard, a fiber outlet is formed in the first wallboard, a second pipeline connector is arranged at the bottom of the first pressure chamber, and a fiber inlet and a first pipeline connector are formed in the cover plate. According to the utility model, a double-cabin structure is arranged to control the pressure in the first pressure cabin to be low positive pressure and the pressure in the second pressure cabin to be negative pressure, so that after fibers are fully infiltrated, excessive glue solution is removed through pultrusion, and inclusion bubbles and volatile matters are fully removed, thereby improving the quality of a resin-fiber pultrusion composite material product; and high pressure and strict sealing requirements of traditional high-pressure injection are reduced, and the device is suitable for the field of gum dipping.

The invention provides a preparation method of a steel-polymer fiber continuous composite fiber reinforced alkali-activated pozzolanic concrete material, which comprises the following steps: carrying out gum dipping treatment on steel fibers, winding carbon fiber yarns on the gum-dipped steel fibers to obtain wound composite fibers, coating the surfaces of the composite fibers with a molten-state active porcelain glaze coating, drying, curing and cutting to obtain the steel-polymer fiber continuous composite fiber reinforced alkali-activated pozzolanic concrete material. The steel-polymer fiber continuous composite fiber is obtained; sequentially adding the coarse aggregate, the natural volcanic ash, the fine aggregate, the steel-polymer fiber continuous composite fiber, the water reducing agent and the exciting agent, and performing pouring, standard curing and specified testing. The material is good in tensile strength and crack resistance and effectively adapts to various severe and complex engineering environments, and the durability is improved. The concrete has good adhesion, can ensure that the load can be uniformly transmitted when the concrete is subjected to an external load, avoids the internal stress concentration and damage of the concrete, and greatly improves the compressive strength of the concrete and the integrity of a structural member.

The invention discloses carbon fiber paper, a preparation method thereof and a proton exchange membrane fuel cell, and relates to the technical field of fuel cells. The preparation method comprises the following steps: filtering carbon fiber slurry containing chopped polyacrylonitrile-based carbon fibers, and carrying out wet molding to obtain a wet carbon fiber layer; adding a modified reinforcing agent solution into the wet carbon fiber layer, and then heating, drying and pressing to obtain carbon fiber base paper; and immersing the carbon fiber base paper into the resin solution, drying, and carrying out hot-pressing curing, carbonization and graphitization treatment to prepare the carbon fiber paper for the fuel cell. According to the invention, the modified reinforcing agent and the functional filler can be more easily adhered to the cross connection part of the carbon fibers, so that on one hand, an electrified network is enhanced, the electric conduction and heat conduction properties of the product are improved, and on the other hand, pore filling caused by addition of the conventional functional filler in a resin impregnation stage can be avoided; and negative effects are generated on pores and air permeability of the product.

The invention relates to the technical field of composite material forming, in particular to a pultrusion process and system based on resin-based constant-pressure control, and the pultrusion process comprises the following steps: fiber guiding gum dipping: selecting a normal-pressure mode or a closed mode; collecting die cavity pressure data and pultrusion force data in real time; the pressure data of the mold cavity are compared with a set interval, and the glue injection flow and / or the pultrusion speed are / is adjusted; and comparing pultrusion data with a set interval, reversely optimizing the pressure of the mold cavity based on tension feedback, and reducing the stress of the product, and the method has the following beneficial effects that the resin supply or pultrusion speed is adjusted in real time and the pressure of the mold cavity is kept constant by combining a dual-mode resin impregnation system (normal-pressure impregnation / closed glue injection) with a mold cavity pressure closed-loop control technology. A pressure-tension cooperative control model is innovatively provided, and internal stress distribution of the product is optimized. The embodiment verifies that the pultrusion force can be reduced by more than 15%, the bubble rate can be reduced by more than 30%, and the mechanical property and the production stability of the product can be obviously improved.

The invention discloses a fiber reinforced rib mesh production system, and relates to the technical field of fiber reinforced rib meshes. A gum dipping assembly is arranged on the side face of the positioning yarn splitting frame, a weaving assembly is arranged on the side face of the gum dipping assembly, a guiding assembly is arranged at one end of the weaving assembly, and a cutting assembly is arranged on the side face of the guiding assembly; the gum dipping assembly comprises a machine body, an unwinding shaft is rotatably mounted in the machine body, a gum dipping pool is fixedly mounted on the side face of the machine body, a mounting frame is fixedly mounted at the top of the gum dipping pool, a rotating shaft is rotatably mounted at the bottom of the mounting frame, and a connecting frame is fixedly mounted on the side face of the gum dipping pool; by adapting to the weft fiber bundles with different diameters under different conditions, the movement automation degree of the weft fiber bundles is higher, the movement of the weft fiber bundles is more stable, the precision is higher during penetrating weaving, and the application range is wider.

The invention provides a weaving device and a weaving system for weaving a fiber woven rope. The weaving device and the weaving system are used for solving the problem that in the prior art, the fiber cohesiveness of a reinforcing agent or thermosetting resin to a reinforced fiber rope is not optimal. The device comprises a base, a core yarn frame, a first impregnation module, a weaving yarn module, a driving module, a second impregnation module, a third impregnation module and a twisting guide module, the knitting yarn module comprises a knitting yarn frame, a first guide disc, a first yarn guide disc, a second yarn guide disc, a second guide disc and a third yarn guide disc which are sequentially and coaxially arranged at intervals; a core yarn fiber bundle is subjected to infiltration treatment through the first impregnation module before weaving, and a weaving yarn fiber bundle is subjected to infiltration treatment through the second impregnation module and the third impregnation module before weaving, so that it is ensured that the fiber cohesiveness of a reinforcing agent or thermosetting resin to a reinforced fiber rope is not optimal.

The invention belongs to the technical field of fiber reinforced resin special-shaped profile production, and provides a production line and a production process of a co-extrusion profile, and the production line of the co-extrusion profile comprises a positioning yarn splitting frame, a yarn guiding frame, a yarn guiding frame and a yarn guiding frame, the yarn penetrating and gum dipping frame is used for conducting gum dipping on the yarn conveyed by the positioning yarn splitting frame, and the yarn penetrating and gum dipping frame is further used for installing a felt roll; the mold fixing area is provided with two mold supports, the mold supports are used for fixing a forming mold of the galvanized steel sheet reinforced special-shaped profile, and the yarn inlet side of the forming mold is fixedly connected with a pre-forming mold frame; the device further comprises traction equipment and cutting and discharging equipment. The galvanized steel plate roll is arranged between the yarn and the felt, so that the service life of the formed special-shaped profile can be guaranteed; according to the production process, the galvanized steel plate roll placing racks are arranged at different positions of the forming equipment according to different produced profiles, so that the equipment is more flexible in the production process.

The invention relates to the technical field of continuous fiber composite material preparation, and discloses a water-based environment-friendly impregnation system and a process technology for preparing a carbon fiber framework material by using the same. The water-based environment-friendly impregnation system is prepared from the following raw materials: deionized water, vinyl resin, cumyl hydroperoxide, bisphenol A epoxy resin and 1, 2-cyclohexanediamine. The impregnation system is adopted to perform impregnation treatment on continuous carbon fiber precursors, the continuous carbon fiber precursors are twisted into carbon fiber tows after being dried and shaped, then the carbon fiber tows are soaked in RFL impregnation liquid for the second time, and the continuous carbon fiber framework material product is obtained after drying, curing crosslinking and shaping. According to the preparation process, continuous carbon fibers are firstly soaked and dried, then twisted together and then subjected to secondary soaking, the infiltration rate of carbon fiber tows can be increased, dispersed carbon fiber filaments can be bonded and twisted into an organic whole, and the bearing capacity of the carbon fiber framework material is improved.

The invention provides an artificial board production method and system based on a digital informatization platform, and relates to the technical field of production technology.The artificial board production system comprises an artificial board base material base arranged in a forestry resource-rich area and used for processing forest resources and plant fiber raw materials into an artificial board base material of a shaving board or a fiberboard; the printing, dipping and pressing industrial area and the artificial board base material base are arranged in a centralized mode, and the printing unit comprises a plurality of sets of photogravure printing machines and is used for printing body paper to form artificial board facing decorative paper; the glue dipping unit is used for dipping the printed artificial board decorative paper into a hot-melt melamine glue solution through a glue dipping tank; the pressing and pasting unit is used for performing high-temperature oil pressing on the artificial board base material and the impregnated artificial board facing decorative paper to form a finished board; an intelligent logistics system for centralized production process management and control is used for carrying out intelligent automatic linkage on equipment of a printing unit, an impregnation unit and a pressing and pasting unit, the production cost of an integrated industrial area is greatly reduced, and high-quality management and control can be carried out.

A kind of carbon fiber wet winding extrusion equipment, it relates to carbon fiber extrusion field, including roller bracket, roller and glue tank, the inner side surface of the roller bracket on both sides has the axle slot of interval arrangement, the roller is inserted between the axle slot on both sides by bearing, can utilize ultra-smooth roller to carry out extrusion to carbon yarn of resin infiltration, extrude excess resin, to reach the purpose of controlling the resin content of winding layer, also can utilize the angle difference between yarn extrusion roller to optimize the shortcoming of parallel extrusion, prevent the resin that has been extruded from being bonded on roller reverse rotation secondary resin dipping.

The utility model relates to the technical field of glass fiber processing, and discloses impregnation equipment for glass fibers, which comprises a bottom plate, the top of the bottom plate is fixedly connected with a shell in which resin is stored, and the front side and the rear side of the shell are respectively provided with a notch, so that glass fiber cloth can pass through the shell through the notches; the upper side and the lower side of the shell communicate with a glue return pipe and a glue outlet pipe which are of an L-shaped structure correspondingly, a longitudinal long pipe communicates between the glue return pipe and the glue outlet pipe, and resin in the glue outlet pipe can be upwards conveyed into the glue return pipe to be discharged after flowing into the long pipe. Resin stored in the shell can be discharged into the long pipe from the glue outlet pipe, is conveyed into the glue return pipe in the long pipe and is discharged, so that the resin can be poured on the glass fiber cloth from the top, the resin can permeate into the surface of the glass fiber cloth, the mobility of a glue dipping material can be ensured by the glue dipping mode, and the glue dipping quality is improved. Bubbles in the resin are reduced, defects in the material are avoided, and the quality of a finished product is improved.

The invention discloses an outdoor high-wear-resistance waterproof fabric and a preparation method thereof.The preparation method comprises the following steps that S1, composite fibers are spread on a transmission roller set, a glue groove is formed below one transmission roller, the transmission roller forms a glue dipping roller, and when the composite fibers pass through the glue dipping roller under the traction effect, the composite fibers are immersed in glue liquid in the glue groove to complete glue dipping; s2, drying and compounding a waterproof film and the impregnated composite fiber on a drying roller to obtain unidirectional cloth; s3, orthogonally stacking the two pieces of one-way cloth, enabling the silk surfaces of the two pieces of one-way cloth to be in contact with each other, performing plane pressurization to 8-10MPa, setting the temperature to 115-125 DEG C, and keeping the temperature for 5-10min, so as to obtain the ultrathin high-strength wear-resistant waterproof fabric. The ultra-high molecular weight polyethylene fibers have excellent wear resistance, are further combined with the glue solution through hot melting fusion, are more uniformly distributed in the fabric and can better bear friction and wear of external force, so that the wear resistance of the fabric is improved.

The invention discloses a production process of heavy aramid canvas. The production process comprises the following steps: S1, using aramid precursors as raw materials; s2, performing primary twisting on the aramid fiber protofilaments by using a rope twisting machine to form primary twisted filaments; s3, performing second twisting on the first twisted yarns by using a second twisting machine to form second twisted yarns; s4, weaving the second twisted yarns to form canvas; s5, the canvas is subjected to gum dipping treatment; wherein the impregnation formula comprises the following components in parts by weight: 0.37 part of caustic soda flakes, 14.7 parts of resorcinol, 14.7 parts of formaldehyde, 429 parts of butadiene-vinylpyridine rubber latex, 21 parts of ammonia water, 495.23 parts of water and 25 parts of isocyanate; the gum dipping speed is set to be in a periodic pulse mode. According to the method, the impregnation speed of the aramid canvas is set to be in a periodic pulse mode, so that the impregnation uniformity can be improved, the strength distribution is more consistent, and the strength loss rate is reduced. Through tests, the strength of the heavy aramid canvas can reach 4864n / mm.

The application discloses a winding forming device, comprising a rack, a glue dipping device for dipping yarn, a core mold fixing device for fixing a core mold, a winding device for winding yarn on the core mold, the glue dipping device, the core mold fixing device and the winding device being sequentially arranged along the length direction of the rack; the rack comprises a first rack and a second rack, the core mold fixing device is arranged on the first rack, and the winding device is vertically arranged on the second rack; and the first rack and the second rack are separately arranged. The winding forming device can prevent the fiber layer from deviating due to the vibration of the winding device caused by the stress of the core mold, effectively improves the qualified rate of products, and is simple in installation and dismounting operation of the core mold, high in operation efficiency and high in recycling rate of resin glue solution. The application further discloses a winding forming production line.

The present invention discloses a method for preparing an ultra-high molecular weight polyethylene fiber electric rope, which relates to the technical field of electric traction ropes. The preparation comprises the following steps: paralleling and twisting; dipping: the ultra-high molecular weight polyethylene fiber strands are transported by guide rollers to the inside of a dipping tank for dipping, and the resin glue is a mixture of triallyl isocyanurate, phenolic resin, oily polyurethane and glass microbeads; extrusion and pre-drying; preliminary drying; braiding the rope core; pre-shaping; drying and shaping; braiding a double sheath; coating. The advantages of the present invention are that when the ultra-high molecular weight polyethylene fiber electric rope is prepared, it is functionalized by the composite resin glue in the dipping tank, and through the synergistic effect between triallyl isocyanurate, phenolic resin, oily polyurethane and glass microbeads in a specific ratio, and the optimization of the processing technology, the high temperature resistance and corrosion resistance of the electric rope are improved, the overall strength is enhanced, and the insulation resistance is good, which meets the use requirements of some specific occasions.

The invention provides a high-thermal-conductivity low-modulus graphene fiber heat-conducting gasket and a preparation method thereof. Graphene fibers are directionally wound and impregnated to prepare a prepreg, the prepreg is laminated and bonded to form a high-orientation fiber plate, and then the high-orientation fiber plate is directionally cut in the direction perpendicular to the fibers to obtain the heat-conducting gasket composed of continuous vertical fibers and organic silicon. The fiber is of an X-shaped crossed network structure, and is combined with an elastic silica gel matrix to form a hinge-like structure which can be highly deformed under the orientation of 0.5-10 degrees and-10--0.5 degrees, so that the compression resilience and durability are remarkably improved, and meanwhile, efficient heat conduction is kept. According to the structure, the problems of buckling, fracture and stress concentration which are easily caused by traditional vertical or random arrangement are avoided. A one-way felt impregnation lamination cutting method is adopted, the processing problem caused by high filler is solved, the fiber content can reach 85.1 wt%, and the array density is 2.4-195.9 mg / cm. The gasket has high thermal conductivity, low modulus and excellent rebound resilience, and is suitable for thermal management of high-power electronic equipment such as electronic base stations, communication radars, new energy automobiles, aerospace and the like.

The utility model discloses a woven bamboo curtain impregnation device, and relates to the technical field of bamboo curtain impregnation devices, the woven bamboo curtain impregnation device comprises a base and an impregnation pool arranged on the base, the top of the base is provided with a support frame, and the inside of the support frame is rotatably provided with a lifting screw rod; residual glue at the upper end and the lower end of the bamboo curtain can be scraped under the condition that the bamboo curtain is not damaged through the arranged soft scraping plate, the soft scraping plate is elastically supported through the telescopic columns and the supporting springs, and it is guaranteed that the soft scraping plate has certain pressure when making contact with the bamboo curtain, and the glue can be properly scraped; normal movement of the bamboo curtain is not hindered, the uniformity of glue on the surface of the bamboo curtain is further improved, waste caused by dripping of the glue on the outside is avoided, the production cost is reduced, the fine adjustment lead screw can drive the upper soft scraping plates to ascend and descend so as to change gaps between the soft scraping plates, and the device can adapt to the bamboo curtains with different thicknesses and is suitable for popularization and application. And the application range of the device is further expanded.

The application relates to the technical field of carbon materials, in particular to a carbon / carbon heating device and a preparation method thereof.The preparation method comprises the following steps: mixing dispersed short carbon fibers, a dispersing agent, carbon material powder, water-based phenolic resin and water, stirring and uniformly dispersing, pouring into a preset shape filter tank for suction filtration to obtain a short fiber mesh reinforced sheet layer with a preset shape; performing impregnation treatment on the short fiber mesh reinforced sheet layer, and obtaining a prepreg reinforced sheet layer after drying; laying carbon fiber filaments and performing glue coating treatment, and forming a carbon fiber filament layer with a preset shape after drying; cutting a carbon fiber cloth into a preset shape and performing impregnation treatment to form a carbon fiber cloth layer; and stacking and arranging the prepreg reinforced sheet layer, the carbon fiber filament layer and the carbon fiber cloth layer in a staggered mode, wrapping the surface of a cylindrical heater mold in an oxygen-free environment, heating and curing to form a cylindrical preform, and performing carbonization, cycle densification, high-temperature purification and machining treatment to form the carbon / carbon heating device. The application can improve the uniformity of the device conductivity.

This invention provides a fiber winding and impregnation apparatus, comprising a cabinet, an impregnation assembly, a feeding roller, and a scraping assembly. The cabinet contains an operating table with an impregnation tank filled with resin, and a weighing sensor at the bottom for weighing the resin. The impregnation assembly includes an impregnation roller group extending into the impregnation tank and a power mechanism for driving the roller group to move vertically. The feeding roller is located within the cabinet on the feeding side of the impregnation assembly and is equipped with an encoder. The scraping assembly includes a rotating shaft and a scraper plate located above the rotating shaft. The scraper plate has a degree of freedom to move vertically and has an adjusting block at its top. This fiber winding and impregnation apparatus allows for adjustment of the impregnation depth and scraping force for fiber bundles of different specifications during impregnation, ensuring the performance and quality of composite material products.

The invention relates to the field of bamboo veneer processing, in particular to a method for widening a large-breadth flattened sliced bamboo veneer, which comprises the following steps of: compounding the sliced bamboo veneer with gauze or non-woven fabric by hot pressing; edge cutting and width fixing are conducted on the compounded sliced bamboo veneers; glue is smeared in the thickness direction of the sliced bamboo veneers; the sliced bamboo veneers are placed in an environment of 30-50 DEG C, and glue is dried; the dried sliced bamboo veneers are placed in a board splicing machine for pre-splicing; and hot-pressing and compounding the sliced bamboo veneer and the gauze or the non-woven fabric again to obtain a finished product. The formaldehyde-free environment-friendly adhesive is adopted, so that chemical pollution is reduced; the side face of the sliced bamboo veneer is pre-spliced and combined with gauze / non-woven fabric, multiple times of gum dipping is avoided, and gum consumption can be reduced; continuous veneers with the width of 2-10 m or above can be prepared, cloth-shaped veneering materials are achieved and directly used for wall decoration, and machining links can be reduced; the cut bamboo wood is suitable for household products such as stationery bags and computer supports, and the application dimension of the bamboo wood can be expanded.