523 results about "Fiberboard" patented technology

The invention relates to the technical field of gypsum fiberboard raw material treatment, in particular to a plant fiber for a gypsum fiberboard and a preparation method and application thereof. Compared with the prior art, the preparation method provided by the invention adopts specific process steps, plant fiber raw materials are softened by using a supersaturated calcium hydroxide solution to partially remove lignin, the treated plant fiber slurry is introduced into a sulfuric acid solution for neutralization in the water washing process, and generated nano-scale calcium sulfate particles are attached to the surfaces of the plant fibers, so that the surface of the plant fibers is uniform. The plant fiber coagulant plays a role of a coagulant during production of the gypsum fiberboard, and the plant fiber meeting the requirements of production of the gypsum fiberboard is prepared. The preparation method provided by the invention is low in cost, and the gypsum fiberboard prepared from the obtained plant fiber for the gypsum fiberboard has relatively high mechanical property indexes and meets the performance requirements of boards for building decoration.

The present invention relates to a composition (the composition of the invention) comprising a component A consisting of a polylysine component, an XL component and a fibrous component consisting of at least one fibrous element comprising plant fibers, and wherein the fibrous element is free of any other fibers other than plant fibers, and wherein the component A consists of a polylysine component, an XL component, and a fibrous component consisting of at least one fibrous element comprising plant fibers. And the composition does not contain any fibers other than the plant fibers of the fiber component. The invention further relates to a method for obtaining an object from the composition according to the invention. The invention further relates to objects (objects of the invention) obtained by said method, such as sheets, strips, bars, strips, films, cloths, containers, panels, panels, beams, frames, slats, engineered wood, such as fiberboards. The invention further relates to an article (article of the invention) comprising a) a component that is solid at 23 DEG C and 1 atm; and one or both of b) and c) wherein b) is the composition of the invention and c) is the object of the invention. The invention further relates to various uses of any one or any combination of the composition of the invention, the object of the invention and the article of the invention.

The present invention relates to a composition (the composition of the invention) comprising a component A consisting of a polylysine component, an XL component and a fibrous component consisting of at least one fibrous element comprising plant fibers, and wherein the fibrous element is free of any other fibers other than plant fibers, and wherein the component A consists of a polylysine component, an XL component, and a fibrous component consisting of at least one fibrous element comprising plant fibers. And the composition does not contain any fibers other than the plant fibers of the fiber component. The invention further relates to a method for obtaining an object from the composition according to the invention. The invention further relates to objects (objects of the invention) obtained by said method, such as sheets, strips, bars, strips, films, cloths, containers, panels, panels, beams, frames, slats, engineered wood, such as fiberboards. The invention further relates to an article (article of the invention) comprising a) a component that is solid at 23 DEG C and 1 atm; and one or both of b) and c) wherein b) is the composition of the invention and c) is the object of the invention. The invention further relates to various uses of any one or any combination of the composition of the invention, the object of the invention and the article of the invention.

The invention relates to the technical field of carbon fiber plate detection, and discloses a carbon fiber processing quality detection device and a detection method.The carbon fiber processing quality detection device comprises a workbench, the upper surface of the workbench is provided with two detection piece bearing assemblies which are used for placing a carbon fiber plate needing to be detected in a side-standing mode, and the two detection piece bearing assemblies are arranged in a mirror image mode; an extrusion unit is arranged on the upper surface of the workbench and located on one side of the two detection piece bearing assemblies and used for extruding the side edge of the carbon fiber plate, and a bending degree detection unit is arranged on the upper surface of the workbench and located on the other side of the two detection piece bearing assemblies and used for detecting the resilience degree of the extruded carbon fiber plate. According to the invention, through the arrangement of the detection piece bearing assembly, a carbon fiber plate to be detected can be placed on the device in a side-standing manner, so that the error of an experiment result caused by the weight of the carbon fiber plate when the carbon fiber plate lies flat is effectively reduced.

The utility model discloses a molten aluminum runner prefabricated part structure with a thermal insulation layer, which belongs to the technical field of metal diversion trenches and comprises a base, a diversion trench and a top cover. The flow guide groove is composed of a high-temperature contact plate, a ceramic fiber plate, a reflecting film and a protective shell which are sequentially connected from inside to outside in a sleeved mode, the top cover is connected to the top of the flow guide groove, the top cover seals the top of the flow guide groove, and heat loss generated when aluminum water flows can be reduced; the heat preservation performance in the aluminum water conveying process can be remarkably improved, and oxidation and pollution are reduced.

The invention relates to a natural building material panel consisting of individual blanks made of clay and loam, which are arranged seamlessly and offset and are connected by force. Since the individual components (blanks) are already dry, the panel production process is not subject to drying shrinkage, and the final panel can be as large as an entire wall. The overlaps and the fully bonded paper reinforcements on the top and bottom surfaces, as well as between the layers, provide sufficient reinforcement to withstand flexural loads. The internal reinforcements are temporarily protected by the resting blanks in case of fire or water, thus keeping the plate dimensionally stable for longer.

The invention discloses a tray device for silicon wafer film forming and a film forming method, and the tray device comprises one or more carbon fiber plates which are used for bearing silicon wafers, and the boundary dimension and the number of the carbon fiber plates correspond to the coating area; the upper surface of the carrier is used for bearing the carbon fiber plates, the carrier corresponds to one or more carbon fiber plates, one or more through holes are formed in the carrier, the through holes are located below the tray and correspond to the carbon fiber plates one to one, and when the carrier bears the carbon fiber plates, the carbon fiber plates are placed on the carrier in a floating mode; the heater is made of a metal material, is grounded, is provided with a horizontal upper surface, and is positioned in the through hole when viewed in the vertical direction; the heater can move up and down, rises to enable the upper surface to be attached to the tray through the through hole, and supports the tray. Therefore, the boundary dimension and the number of the carbon fiber plates can be adjusted according to the coating area required by the PECVD process, so that the application range of the tray device for silicon wafer film forming is widened.

The utility model provides a kind of furniture processing in medium fiberboard pastes wood skin corner laminator, it is related to furniture processing technical field, including workbench and support, the inside of support is equipped with mounting bracket, the surface of support is fixedly installed with hydraulic cylinder, the inside of mounting bracket is equipped with laminating mechanism, the surface of workbench is slidably connected with clamping plate, the side of clamping plate is equipped with protective pad.The utility model drives screw rod to rotate by starting motor two drive, so that sliding block slides along slide bar two, so as to adjust the position of laminating roller, can carry out laminating operation to the different position of medium fiberboard corner, and the cooperation of telescopic block, positioning plate and tension spring, so that positioning plate can adapt to the shape of medium fiberboard corner, play accurate positioning effect in laminating process, while laminating roller can apply uniform pressure to wood skin, ensure that wood skin and medium fiberboard corner are closely laminated, effectively solve the problem that corner lamination is not firm, edge lifting and the like, improve furniture processing quality.

This utility model relates to the field of cement fiberboard assembly technology, and particularly to a cement fiberboard curtain wall structure, including a receiving and mounting base. The receiving and mounting base has a positioning groove with a through front end on both the left and right sides of its inner lower wall. A bolt is threadedly connected to the lower center of the receiving and mounting base. The inner rear wall of the receiving and mounting base has four T-shaped slots with through upper ends. A positioning rectangular groove with a through upper end is located in the center of the inner rear wall of the receiving and mounting base, between two adjacent T-shaped slots. A curtain wall panel installation structure is provided within the receiving and mounting base. This utility model's cement fiberboard curtain wall structure, by providing positioning grooves and T-shaped slots in the receiving and mounting base, combined with the curtain wall panel installation structure and curtain panel installation reinforcement structure, achieves precise positioning and stable installation of the cement fiberboard, effectively improving the curtain wall's sealing performance and overall stability.

The utility model provides a cooling device for processing a transmission part of an electric vehicle, which comprises a cooling box, one side of the cooling box is fixedly connected with a purification box, the inner wall of the purification box is fixedly connected with a rough filtration chute block, the inner part of the rough filtration chute block is slidably connected with a rough effect non-woven fabric plate, and the rough effect non-woven fabric plate is fixedly connected with the purification box. The cooling device comprises a purification box, the inner wall of the purification box is fixedly connected with a medium filtering sliding groove block, the interior of the medium filtering sliding groove block is slidably connected with an activated carbon fiber board, and the inner wall of the purification box is fixedly connected with a fine filtering sliding groove block. A multi-stage air purification system is formed by the purification box connected with the purification box, the coarse filtration sliding groove block, the coarse-effect non-woven fabric plate, the medium filtration sliding groove block, the activated carbon fiber plate, the fine filtration sliding groove block and the efficient filter paper plate, and steam containing harmful substances and formed by evaporation of high-temperature cooling liquid generated in the machining process can be effectively filtered.

Gypsum fiberboard comprising a gypsum matrix, wherein, for reinforcement of the gypsum matrix, collected and recycled packaging of insulating materials comprising a kraft paper recyclate and / or a papyroline recyclate is added.

The utility model discloses an interior decoration sound insulation wallboard which comprises a wallboard body, the wallboard body is composed of a damping layer, a sound insulation cotton layer, a carbon fiber plate and a veneer, a modulation mechanism is arranged on the back face of the veneer and comprises a modulation bottom plate, a T-shaped square hole is formed in the front face of the modulation bottom plate, a rectangular movable block is arranged in an inner cavity of the T-shaped square hole, and the rectangular movable block is arranged in the inner cavity of the T-shaped square hole. The back face of the rectangular movable block is provided with a reed, the front face of the rectangular movable block is provided with a circular rotating plate, and the front face of the circular rotating plate is provided with a rectangular rotation limiting block. According to the utility model, the modulation mechanism is arranged, and through the cooperation of the modulation bottom plate, the rectangular movable block, the reed, the circular rotating plate and the rectangular rotation limiting block, the decorative panels can be rotated and adjusted after the indoor decorative soundproof wallboards are adhered, so that the decorative patterns of the decorative panels of the two adjacent soundproof wallboards are coherent, and the soundproof wallboards do not need to be disassembled for reinstallation; and the construction cost is reduced.

The utility model provides a kind of screw fastening auxiliary device in furniture processing medium board metal iron stand, it is related to screw fastening auxiliary technical field, including eccentric wheel, fastening mechanism and reinforcing mechanism, the fastening mechanism includes fastening plate and magnetic block, the inner bottom wall of the magnetic block is connected with fastening plate, inner top wall, the fastening plate and magnetic block are used to connect the fastening purpose of screw and eccentric wheel, the reinforcing mechanism includes counterweight, the inside fixed connection of the counterweight has cross plate, the inside fixed connection of cross plate and counterweight, in the utility model, when screw is connected with eccentric wheel, fastening plate can limit one end of screw, and magnetic block can adsorb and fix one end of screw, so that the purpose of double fastening of screw can be achieved, and the strength of eccentric wheel can be improved by using the weight of counterweight and the cross support of cross plate.

The utility model discloses fiberboard drying equipment convenient for hot air circulation, a drying mechanism comprises a drying box, supporting legs are fixedly mounted on both sides of the bottom surface of the drying box, mounting plates are symmetrically and fixedly mounted in the middle of the bottom surface of the drying box, and lower through holes are formed in both ends of the surface of each mounting plate; a first air guide fan is fixedly installed on the inner wall of the lower through opening in one side, a first dust cover is fixedly installed on the inner wall of the lower through opening and located below the first air guide fan, a second air guide fan is fixedly installed on the inner wall of the lower through opening in the other side, and a second dust cover is fixedly installed on the inner wall of the lower through opening and located above the second air guide fan. And a plurality of air guide fans are arranged between the fiber boards of the drying box, so that hot air in the drying box can fully flow, and heat is driven to uniformly air the surfaces of the limiting plates.

The invention discloses a novel right-angle steel material detection jig which comprises a fixed seat, a first track, a second track, a first stop block, a second stop block and a fiber board, a first track groove is formed in the fixed seat, and the first track is detachably connected into the first track groove; a first track groove is formed in the fixed seat, a second track groove is formed in the fixed seat and located on one side of the first track groove, and a second track is detachably connected to the interior of the second track groove. The gauge calibration slide rail is manually pushed at a constant speed to move back and forth to measure right angle data of a steel material, a traditional detection mode can be replaced, the detection precision can be ensured, the manual measurement time can be shortened, the detection speed can be improved, a specially-assigned person is not needed for detection, the labor cost can be reduced, and the jig is portable, does not occupy a machining machine table and is convenient to use. And the overall use effect can be improved.

The invention relates to the technical field of composite material manufacturing, and discloses a light-weight carbon fiber plate vacuum infusion forming method which comprises matrix resin, a curing agent, a controllable phase change self-expanding pressing agent and a pressure response type gel triggering agent. The intelligent resin system is pre-arranged on a fiber pre-forming body and is sealed and vacuumized to form a sealed cavity, and then the controllable phase change self-expanding pressing agent is subjected to phase change gas production at a preset triggering temperature through programmed temperature rise, so that internal micro-positive pressure is formed in the cavity. The internal micro-positive pressure drives the resin to infiltrate the fibers, and activates the pressure response type gel triggering agent to initiate gel curing, and then high-temperature curing is completed. According to the method, through internal micro-positive pressure generated in situ, self-expanding, complete and uniform infiltration of the resin on fibers is achieved, the compaction effect can be continuously applied in the curing stage, the internal porosity and dry spot defects of a workpiece are remarkably reduced, and the mechanical property and the internal quality of a composite material plate are improved.

The disclosure relates to an electrically heated wall element (15) comprising a body sheet (20) comprising one or more of plasterboard, fibreboard such as plywood, plastic board, composite material, and sheet moulding compound and at least one heating element (10) on a first face of the body sheet -820). The at least one heating element (10) is formed as a heating element stack (25) and a surface layer (28) comprising one or more material layers covers the first face of the body sheet and the heating element stack. A heatable area of the electrically heated wall element is at least 0.15 m2. The heatable area is configured to be heated by a single heating element or by a plurality of heating elements, each of the plurality of heating elements configured to heat an area of at least 0.01 m2. The patterned conductive element of the single heating element or the plurality of heating elements covers 20% to 60%, preferably 40% to 50% of the heatable area.

The utility model belongs to the technical field of fiberboard processing, and particularly relates to a fiberboard raw material wind washing device which comprises a wind washing device body, the wind washing device body comprises a supporting frame, a box body is arranged above the supporting frame, a material distributor is arranged in a feeding port, and a material outlet is formed in the box body. A material conveying plate arranged in an inclined mode is arranged below the material distributor, a blowing pipe is arranged on the lower portion in the box body, a limiting plate is arranged at the lower end of the partition plate, a flow dividing plate is arranged on one side of the limiting plate, and a first material discharging cover is arranged below the position, between the blowing pipe and the flow dividing plate, of the box body. And a semicircular drainage plate is arranged in the box body on one side of the partition plate. The device is reasonable in design, simple in structure and convenient to machine, the wind washing process of raw materials can be effectively improved, the wind washing effect is guaranteed, the raw materials of different specifications and sizes after wind washing are collected in a classified mode, the using functionality of the device is improved, the working process is guaranteed, and the using requirement is met.

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 invention provides medium-density fiberboard drying waste gas treatment equipment, and relates to the technical field of waste gas treatment, the medium-density fiberboard drying waste gas treatment equipment comprises a fixed seat, a bracket is fixedly mounted on the side of the fixed seat, a barrel body is fixedly mounted in the fixed seat, gas inlet pipes are fixedly mounted at the two ends of the barrel body, and a driving motor is fixedly mounted at one end of the barrel body. According to the invention, the movable cylinder is pushed to move by the air pressure of waste gas, the movement of the movable cylinder realizes the filtration of a filter point according to the thrust of the air pressure, the movable cylinder enters the fixed cylinder under the pushing of the air pressure, and the air outlet hole preferentially contacts with the 1 / 2 part of the filter plate for filtration; the gas filtered by the filter plate is secondarily adsorbed and filtered by water mist sprayed by the atomizing spray head, the gas pressure of the waste gas is reduced in the later period, the movable cylinder is shrunk by a half distance, and the gas outlet hole moves to the other half position for filtering.

The utility model relates to the technical field of quartz fiberboard processing, in particular to a cutting device for quartz fiberboard processing, which comprises a shell, a cutting groove is processed in the middle of the shell, a bending plate is fixedly connected to the outer wall of the shell, a cutting mechanism is arranged below the bending plate, a cutting knife is arranged below the cutting mechanism, and the cutting knife is arranged below the cutting mechanism. And a bulge at the right end of the cutting knife is fixedly connected with an output shaft of a first motor. According to the cutting device for quartz fiberboard machining, through cooperation of the limiting mechanism and the shell, an output shaft of a second motor rotates to drive a rotating rod to rotate, a push plate is limited by the shell to do linear motion, limiting of the quartz fiberboard is achieved, and compared with a spring, a rack is used for driving the push plate to move the quartz fiberboard more stably; and the electric telescopic rod is stopped, the quartz fiberboard is limited through the pressing roller, and the situation that the cutting precision is affected due to edge warping of the quartz fiberboard during cutting is reduced.

A kind of mixing device of inorganic fiber and solid glue powder, by being arranged from below to above one-stage cylinder and two-stage cylinder in mixing tower, while being arranged glue applying device and spoiler from below to above in one-stage cylinder, being arranged airflow pipe in two-stage cylinder and being arranged glue applying device in airflow pipe, fiber raw material enters from lower end of mixing tower and sequentially passes one-stage cylinder and two-stage cylinder by negative pressure ascending airflow, glue applying device respectively applies glue in one-stage cylinder and two-stage cylinder and mixes twice with fiber, under the action of airflow, make that fiber raw material and glue powder are mixed evenly, glue applying head is ejected from multiple angles to each direction in mixing tower in the process of rotation, improve the dispersion degree of glue powder, blade rotation forms ring-shaped upward airflow column, glue powder and fiber mixture are lifted and suspended and mixed again, greatly increase the contact area of glue powder and fiber, ensure that glue powder and inorganic fiber are mixed fully and evenly, effectively improve inorganic fiber board finished product quality, reduce processing cost.

This invention discloses a multi-sensor fusion-based fiberboard hot pressing control method, belonging to the field of equipment control technology. The invention monitors the displacement and pressing speed of each layer of the hot pressing platen using sensors, analyzes the pre-pressing time of each layer in real time, and adjusts the pressing speed of each layer during pre-pressing accordingly. Before formal compression, it analyzes the estimated time for each layer to reach the corresponding target thickness, obtains an intermediate value as the target time, and adjusts the preset pressure of each layer according to the target time, allowing each layer to be compressed to the target thickness simultaneously. During the holding pressure stage, it analyzes the estimated holding pressure time of each layer, obtains an intermediate value as the target holding pressure time, and adjusts the preset holding pressure of each layer according to the target holding pressure time, allowing each layer to complete holding pressure simultaneously. This ensures the quality of the hot-pressed finished product while ensuring that each layer completes the process synchronously at each stage.

The present application relates to the technical field of composite floor manufacturing, and particularly relates to a carbonized wood multi-insulation layer composite floor and a manufacturing method thereof, comprising: carbonizing wood blanks; obtaining a grid-shaped base material; sequentially laying a base fiberboard, a first grid-shaped base material, a stress absorption layer plate, a second grid-shaped base material and a carbonized wood surface layer in a sequence from bottom to top, and performing cold pressing to obtain a composite floor blank, wherein the cold pressing pressure is adjusted according to the interlayer contact resistance of the first grid-shaped base material, and the relative laying direction of the first grid-shaped base material and the second grid-shaped base material is determined according to the average moisture content and the moisture content distribution variance; preheating and pressing the composite floor blank; determining a step-down value of the hot pressing pressure of a stage-type step-down hot pressing mode according to a thickness change rate; and hot pressing the composite floor blank to obtain a finished product composite floor. The present application realizes the improvement of the performance stability of the composite floor.

The invention relates to the technical field of fiberboard modification, in particular to a fiberboard surface modification treatment method which comprises the following steps that 1, a modification solution is provided for the surface of a fiberboard, the modification solution comprises a sodium silicate solution, and the modulus of sodium silicate used for preparing the modification solution is 1.0-3.0; 2, the fiberboard is aired for 4 min to 6 min; and 3, hot pressing is conducted on the fiberboard. By applying the sodium silicate solution to the surface of the fiberboard, the surface hardness of the fiberboard can be improved, the flame retardant property of the fiberboard is improved, and the dimensional stability of the fiberboard is improved, so that the existing fiberboard can meet the performance requirements of the PCB hole arrangement processing base plate.

The utility model discloses a cleaning device for glass fiber board production, which belongs to the technical field of glass fiber board production and comprises a base for supporting, a fixing frame for conveying and guiding a glass fiber board is mounted in the base, two sliding grooves are symmetrically formed in the fixing frame, and the two sliding grooves are symmetrically arranged in the base. A plurality of springs used for extruding the glass fiber board are installed in the two sliding grooves, one ends of the multiple springs are connected with moving columns, extruding plates used for fixing the glass fiber board are installed on the sides, away from the springs, of the moving columns, and two guide columns are installed on the sides, close to the moving columns, of the extruding plates; according to the cleaning device for glass fiber board production, the contact pressure of the extrusion plate and a fiber board can be self-adapted, the situation that the surface of the glass fiber board is damaged due to too tight fixation or the situation that the glass fiber board moves during cleaning due to too loose fixation is avoided, and the cleaning quality is ensured.

The application discloses a preparation method of a fiberboard suitable for an ultra-flowing calm electric powder spraying process, which comprises the following steps: taking eucalyptus and miscellaneous wood as wood raw materials to obtain fibers after treatment; meanwhile, taking formaldehyde and melamine, mixing and adding urea for three times to prepare melamine modified urea-formaldehyde resin; taking the fibers and applying the obtained melamine modified urea-formaldehyde resin, the sizing amount being 290-300 kg / m 3 , then drying the fibers to obtain a fiberboard blank; taking the fiberboard blank to obtain a board through hot pressing, the density of the board being controlled to be 820-840 kg / m 3 , the core layer proportion being greater than 90% and the minimum density of the core layer being greater than 730 kg / m 3 , then obtaining the fiberboard suitable for the ultra-flowing calm electric powder spraying process after cooling, aging and storage of the board. The fiberboard prepared by the method has the characteristics of anti-hygroscopicity, high strength and excellent structural stability, and solves the problem that the board is easy to crack after powder spraying when the board is subjected to the ultra-flowing process.

The innovative aspirator head comprises a tubular handle and a working head part arranged at the front end of the tubular handle, an aspiration channel is formed in the tubular handle, the working head part is an integrally formed flat wedge-shaped aspiration head, and the aspiration channel is communicated with the aspiration channel. At least one suction hole communicated with the suction channel is formed in the stripping working surface; in the whole stripping process, wound surface errhysis is continuously sucked away through the suction holes, it is ensured that the operation view is clear, and the flat wedge-shaped head cannot pierce lung tissue due to the large contact area and the small pressure intensity; meanwhile, the flat wedge-shaped head is easy to insert into a gap, the pure flat blunt end ensures that the front end cannot be punctured, the clinical pain point that a traditional round-head aspirator is easy to poke into or tear fragile lung tissue is effectively solved, stable poking and separation of a fiberboard are achieved by increasing the stress area, and the safety and controllability of an operation are remarkably improved.

The utility model relates to the technical field of plywood production, and discloses a plywood anti-bending structure which comprises a core plate, two arched plates are connected to the two sides of the interior of the core plate in a glued mode, connecting plates are connected to the bottom of the core plate in a glued mode, and steel carbon fiber plate layers are connected to the tops of the connecting plates in a glued mode. The top of the steel carbon fiber plate layer is connected with a thin plate in a gluing mode. According to the plywood anti-bending structure, the two arch-shaped plates are installed on the two sides of the interior of the core plate, the bending resistance can be improved through the special shapes of the arch-shaped plates, certain buffering force can be provided for the plywood when the plywood is subjected to bending force, the surface of the core plate is not prone to being directly stressed, and the service life of the plywood is prolonged. The outside protection is firmer through the thin plates and the connecting plates, and the surfaces of the rivets penetrate through the whole plywood in the circular grooves, so that when the whole plywood is subjected to external force, the situation that the plywood is separated due to the fact that the plywood is bonded through glue is avoided, and the anti-distortion capacity is reduced.