46results about How to "Avoid corner damage" patented technology

A packaging unit (10) for containing, for example cigarettes (44) has a body made of curved metal (12) and curved metal back (14) surfaces connected by metal sides (16), and a metal bottom (20), preferably having a central raised exterior part or bottom (42) surrounded by a ridge (40), with a lid (22) having a straight hinge (24) across the top, where the unit is capable of hermetic sealing.

Provided are a fiber-reinforced building formwork and a preparation method thereof. The fiber-reinforced building formwork comprises a board core and face layers covering the upper surface and the lower surface of the board core; the board core comprises multiple layers of veneers which are bonded into a whole and have wood fibers, and the directions of the wood fibers of the adjacent veneers are mutually perpendicular; each face layer comprises 1-4 fiber-reinforced prepreg sheet layers which are connected into a whole in a composited mode, each fiber-reinforced prepreg sheet layer is formed by compositing fiber products and high-molecular resin, and each face layer and the board core are connected into a whole through a bonding layer. After the building formwork is boiled for two hours in boiling water in a pressure cooker and cooled for one hour at room temperature, the retention rate of the static bending intensity is at least 90%, and the retention rate of the static bending modulus is at least 90%. The formwork is excellent in mechanical property, good in waterproof and breakage-proof property and long in service life, and the per-use cost of the formwork is reduced; use of wood is avoided, and therefore the formwork is more environmentally friendly.

The invention provides a water drainage and storage concrete pavement structure, which comprises an embankment, a semi-rigid base layer, a bonded waterproof layer, a lower assembly board and an upperassembly board in sequence from bottom to top, wherein a flexible waterproof layer and a plate drainage board are arranged at a lateral joint of the lower assembly board and the upper assembly board,end plates are arranged on the outer side of the lower assembly board, the end plates and the lower assembly board are integrally prefabricated, the top surface elevation is the same as the elevationof an outer side slow track, and prefabricated water tanks are arranged at the lower side of the slow track and the outer side of the lower assembly board. According to the invention, the upper assembly board is arranged between the end plates on the outer side of the lower assembly board, and the flexible waterproof layer and the plate drainage board are arranged at the lateral joint of the upperassembly board and the lower assembly board, so that not only is the lateral movement of the upper assembly board limited, but also the influence of temperature stress on the single-layer board can be reduced, and the interlayer movement of a water body can be achieved. The prefabricated water tank is arranged on the outer side of the lower assembly board and communicated with a built-in drain pipe, so that rainwater on a road surface can be stored and reused.

The invention relates to a cable trench cover opening technology, in particular to a mechanical lifting appliance for cable trench covers of a substation and a switching station. The invention solves the problem that the conventional cable trench cover opening technology is easy to cause the effects that sealing performance of the cable trench cover becomes poor, time and labor are wasted and the cable trench cover is easy to cause accidental damage to a constructor. The mechanical lifting appliance for the cable trench covers of the substation and the switching station comprises a bracket part and a lifting part; the lifting part comprises a Z-shaped crank, chains, lifting hooks and three-jaw suckers; the upper end of a first chain is wound and fixed at a first horizontal edge of the Z-shaped crank; a first lifting hook is fixedly arranged at the lower end of the first chain; the middle part of a second chain is hung on the first lifting hook; a second lifting hook and a third lifting hook are respectively fixedly arranged at both ends of a second chain; handles of two three-jaw suckers are respectively hung to the second lifting hook and the third lifting hook. The mechanical lifting appliance is suitable for opening the cable trench covers.

The invention discloses a spliced structure of a stone floor and a carpet. The stone floor comprises a bonding layer formed on a cement mortar leveling layer, and a stone board on the bonding layer; the carpet close to the stone floor end comprises a wooden keel fixed on the cement mortar leveling layer, a barb board fixed on the wooden keel and a carpet surface layer on the barb board; the joint of the stone floor and the carpet is provided with a connecting piece; the connecting piece comprises a stone floor protection wall and a carpet protection wall; a buckling groove is formed between the floor protection wall and the carpet wall; the stone floor protection wall clings to the bonding layer of the stone floor and the end face, which faces the carpet direction, of the stone board; the carpet protection wall clings to the end faces, which face the stone floor direction, of the wooden keel and the barb board; and the carpet surface layer extends into the buckling groove. The spliced structure has the characteristics of smooth joint, natural transition, installation firmness and the like between the stone floor and the carpet, and the attractiveness of the splicing position between the stone floor and the carpet is ensured; and corners of the stone floor or the carpet are prevented from being damaged, and the decoration quality is ensured.

The invention discloses chip eutectic welding equipment and particularly relates to the technical field of chip processing. The chip eutectic welding equipment comprises a base and a stand column, wherein one side of the top end of the base is fixedly connected with the stand column, an adjusting mechanism is arranged in the stand column, one side of the stand column is fixedly connected with a dust collection mechanism, and the other side of the stand column is provided with a cross rod. By arranging the sliding groove, the adjusting block, the suction cups, the baffle and the center shaft, corners of a chip are prone to being damaged when the chip is clamped and fixed through a traditional welding device, the multiple sets of suction cups are installed at the top end of the workbench used for machining, and the chip is placed at the top ends of the suction cups and then slightly pressed downwards; the chip can be stably placed on the sucking disc, the angle between the baffles outside the center shaft can be adjusted according to the widths of different chips, the angles of the baffles can be adjusted by moving the adjusting blocks, and therefore the situation that corners are damaged due to the fact that the chip is clamped by hard objects can be avoided by fixing the chip.

The invention provides an automatic sorting method of customized furniture plate element vertical placement transmission. The method is characterized by comprising a setting work procedure, a feedingwork procedure, a sorting work procedure and a material discharging work procedure which are sequentially executed, wherein in the setting work procedure, the corresponding relationship of each plateelement and plate element vertical placement space of the sorting device is respectively set; in the feeding work procedure, each plate element of the current batch to be sorted is subjected to information scanning in a grouped way, and the vertical and parallel feeding is performed; and in the sorting work procedure, a moving device carries the plate element to move, so that one-by-one correspondence between the plate element vertical placement space of the moving device where the plate element is positioned and the corresponding plate element vertical placement space position of the sortingdevice is realized, and the plate element is conveyed into the sorting device from the moving device, so that the goal of arranging each plate element in the set plate element vertical placement spaceof the sorting device is achieved. The sorting method provided by the invention has the advantages that the automatic plate element sorting can be realized, so that the packaging of the plate elementby workers in the subsequent work procedure can be convenient; the production efficiency is improved; the missing placement and the wrong placement of the plate element are prevented; and the occupied area is reduced.

The invention provides a printed circuit board production and manufacturing process. The printed circuit board production and manufacturing process is completed through cooperation of a drying frame,a positioning unit, a driving unit, two side face drying units, a connecting plate, a pushing air cylinder and an inserting type drying unit. According to the printed circuit board production and manufacturing process, the problems that in the mode of fixing four corners through screws, the time for a single circuit board is long, assembly line production is not suitable, the screw fixing mode maydamage the surface of the circuit board, the position of the circuit board is always unchanged in the drying process, and most of hot air blows from the periphery to the middle, uneven heating of thesingle circuit board, different heating degrees of circuit boards at different positions and the like can be solved.

The invention discloses a packaging device of a plate-like assembly, which is characterized in that the packaging device of the plate-like assembly is used for packaging at least one plate-like assembly; the packaging device comprises at least one tray and at least one flexible sealing ring; the tray comprises at least one groove; the groove is provided with a bearing platform; the plate-like assembly is located above the bearing platform; the sealing ring is located between the bearing platform and the plate-like assembly, and can be hermetically connected with the bearing platform and the plate-like assembly to form a confined space among the tray, the sealing ring and the plate-like assembly. The vacuum negative pressure is formed by discharging the air among the sealing ring, the plate-like assembly and the tray; each plate-like assembly is adsorbed on the tray through the sealing ring by using the negative pressure. The packaging way makes the plate-like assembly not collide with the tray during handling or transporting.

The invention discloses a composite foamed PVC (Polyvinyl Chloride) attached acrylic board which comprises a fragile product marking strip, a bolt, a hanging ring, an acrylic board, a protective corner, a hook and a high-temperature-resistant coating layer, wherein the fragile product marking strip is arranged on the front surface of the acrylic board; the hook is arranged on the rear surface of the acrylic board; the bolt is embedded into a position, which is close to the front surface of the acrylic board, of one side of a decorative pattern; the protective corner is arranged at a position,which is close to the acrylic board, of the other side of the decorative pattern; the hanging ring is embedded into one side of the fixing seat. The composite foamed PVC attached acrylic board disclosed by the invention is scientific and reasonable in structure and safe and convenient to use; due to the arrangement of the protection corner, the corners of the acrylic board can be conveniently protected by users; due to the arrangement of the hanging ring, the acrylic board can be conveniently fetched by the users, the problem that the acrylic board accidentally drops in the fetching process issolved, and the accident rate of the acrylic board is reduced; due to the arrangement of the hook, the acrylic board can be conveniently fixed and placed by the users.

The invention belongs to the technical field of reflection mirror packaging and discloses a coated fiber reflection mirror fixing method. The method comprises the steps of setting a quartz packaging element with a through groove, and enabling a groove opening of the through groove to be upward; injecting gel into the through groove to form a first gel layer, wherein an outer side face of the firstgel layer facing the groove opening of the through groove is a supporting plane, so the supporting plane and the groove opening of the through groove are spaced; extending one end of a coated fiber into the through groove, enabling a part of the coated fiber extending into the through groove to extend along a through direction of the through groove, and setting up the coated fiber on the supporting plane; and injecting the gel into the through groove to form a second gel layer, thereby packaging the coated fiber into the through groove by the second gel layer. According to the method, deformation generated by the quartz packaging element when packaging gel carries out thermal expansion and contraction can be released through utilization of an unilateral opening of a through groove.

The invention relates to a prestressed concrete corrugated sheet pile and a preparation method thereof, and belongs to the technical field of construction engineering. The prestressed concrete corrugated sheet pile solves the problems that an existing corrugated sheet pile is poor in soil blocking and water retaining effect and prone to damage at a corrugated sheet pile joint in the transportationprocess. The prestressed concrete corrugated sheet pile comprises a corrugated pile body, wherein a tenon is arranged on one side in the length direction of the corrugated pile body in a penetratingmode, and a first groove is formed in the other side of the corrugated pile body in a penetrating mode; the cross section of the tenon and the cross section of the first groove are both semicircular;the tenon can be embedded into the first groove and can rotate in the first groove; a second groove is formed in the concave surface of the first groove in the length direction of the corrugated pilebody in a penetrating mode; a first radius of the first groove is larger than a second radius of the second groove; and the second groove is used for filling with a water-meeting water-stopping adhesive. The invention further provides the preparation method of the prestressed concrete corrugated sheet pile. According to the prestressed concrete corrugated sheet pile, damage to the joint of the corrugated sheet pile in the transportation process is avoided, and the soil blocking and water retaining effects of the corrugated sheet pile are improved.

The invention discloses a carpet closing-up structure which aims to overcome the shortcomings that an existing carpet and stone connecting closing-up structure is complex, inconvenience to install and poor in connection reliability. The carpet closing-up structure comprises a carpet laying part and a stone laying part. The carpet laying part comprises a carpet, a buckle plate, a buckle plate groove, an embedded part and a carpet leveling layer. The stone laying part comprises a stone plate and a stone leveling layer. The stone plate is laid on the stone leveling layer, the carpet is laid on the carpet leveling layer, the embedded part is installed between the stone leveling layer and the carpet leveling layer, the buckle plate groove is mounted on the embedded part, the upper end of the outer side of the buckle plate groove close to the side of the stone plate is provided with a stone insertion groove, and the edge of the stone plate is connected into the stone insertion groove in an inserted mode. The end of the carpet is provided with a clamping part overturned rotatably downwards, the turned position of the clamping part is close to the stone plate, the clamping part is disposed in the buckle plate groove, the buckle plate is positioned between the clamping part and the carpet, and the buckle plate is connected with the embedded part so as to clamp the clamping part between the buckle plate and the buckle plate groove.

The invention discloses a visual communication design drawing collecting device, and relates to the technical field of visual communication design auxiliary equipment. The visual communication design drawing collecting device comprises a first frame, a conveying mechanism, a winding mechanism and a collecting box. The conveying mechanism is arranged on one side of the first frame and comprises a shell, two paper taking assemblies, multiple sets of conveying assemblies, and one end of the shell is fixed to one end of the first frame. The two paper taking assemblies are symmetrically arranged on the side, facing the first frame, of the shell and used for taking paper. The multiple sets of conveying assemblies are arranged on the inner wall of the shell. Each conveying assembly comprises two first motors, two first rotating shafts and a roller, wherein the two first motors are fixed to the two outer side walls of the shell correspondingly, one ends of the two first rotating shafts are fixed with output shafts of the first motors, and two ends of the roller are correspondingly fixed with the other ends of the two first rotating shafts; and the winding mechanism is fixed to one side of the first frame and located below the conveying mechanism. The collecting box is arranged at the end, deviating from the first frame, of the winding mechanism. The visual communication design drawing collecting device has the advantages that drawings are classified and collected according to sizes or categories during collection, searching is more convenient, and the automation degree is high.

The invention discloses a corner protection device for wood-based panels, which comprises a connection assembly, and the connection assembly includes two connecting strips intersecting each other, and the ends of the connecting strips are provided with sequentially connected round hooks and wrap angles. The corner-wrapping block is an isosceles right-angled triangular prism, the axis of the corner-wrapping block is perpendicular to the axis of the connecting strip, and the surface where the hypotenuse in the cross-section of the corner-wrapping block is connected to the connecting strip by a round hook , there are strip grooves on the surface where the hypotenuse is located, the axis of the strip groove is parallel to the axis of the corner block, and the cross section of the strip groove is a right triangle; where the hypotenuse of the corner block is located There are connecting holes on the side near the end face of the bar-shaped groove, and the round hooks at the ends of the connecting slats are respectively hung in one of the connecting holes. The four corners of the wood-based panel are protected by corner-wrapping blocks and other related components and structures to avoid damage to the corners of the wood-based panel when it is collided during movement.

A light dodging rod fixing device, comprising: a fixing component and an adjusting support component. The fixing component is used to directly fix the homogenizing rod, including the base body and the first fastening component. One end of the base body is provided with a fastening counterbore, and the other end is provided with a rectangular light incident positioning through hole leading to the fastening counterbore. The dodging rod is loaded into the base body through the rectangular light incident positioning through hole and passes through the fastening counterbore, and the first fastening component is installed in the fastening counterbore to fix the dodging rod. The adjustable support component is used to support and fix the fixed component, including a support base and a second fastening component. A support positioning step hole is provided inside the support base, and the support positioning step hole includes a support step hole and a light-emitting positioning through hole. In the supporting step hole, the light emitting surface of the homogenizing rod is in the light emitting positioning through hole or passes through the light emitting positioning through hole, and the second fastening component presses the base body. The invention has the beneficial effect of ensuring that the dodging rod is fully in contact with the air and preventing the center of the dodging rod from being deviated.

The invention discloses a thin-walled diamond anti-crack cutting device, which relates to the technical field of diamond processing. The thin-walled diamond anti-crack cutting equipment includes an operation panel, four sets of support legs are fixed on the bottom of the operation panel by bolts, a collection mechanism is arranged under the operation panel, a placement seat is fixedly installed on the top of the operation panel, and a There is an opening, and the opening is located inside the placement seat. Four sets of hooks are fixedly installed on the bottom of the operation panel. There is a net bag under the operation panel. The four corners of the net bag are fixedly connected with rings, and the rings are overlapped with the hooks. The operation panel One side of the gantry is provided with a lifting drive mechanism, the gantry is provided with a connecting frame through the lifting driving mechanism, and a guide seat is fixed on the connecting frame. The invention has a simple structure, can avoid cracking of the diamond plate during cutting, can also perform elliptical cutting on the diamond plate, and is suitable for use and popularization.

The invention relates to the related technical field of road maintenance, in particular to maintenance equipment capable of maintaining tilted floor tiles of a sidewalk. The maintenance equipment capable of maintaining tilted sidewalk floor tiles comprises a supporting mechanism arranged in the upper sides of the tilted sidewalk floor tiles. According to the invention, an adsorption mechanism and a leveling mechanism are arranged, a lifting rotating shaft can be driven to rotate, so that a connecting rod rotates with a second rotating shaft as the center, a sliding rod is driven to move downwards at the same time, and leveling blocks move downwards at the same time to level tilted floor tiles; an adsorption box moves downwards to drive suction cups to move downwards to adsorb the leveled floor tiles, so that corners of the floor tiles can be prevented from being damaged when the floor tiles are taken out; and according to the invention, a clamping mechanism is arranged, a hydraulic push rod is inserted into soil on the lower side of a floor tile, a clamping block extends out to clamp the lower side of the floor tile, and therefore the floor tile can be conveniently taken out, the floor tile can rotate reversely and cannot fall off, and the sidewalk floor tile can be taken out with the quality and quantity guaranteed.

The invention discloses a quick assembly type intelligent fire hydrant. The quick assembly type intelligent fire hydrant comprises a wall body, clamping plates are fixedly connected to the front ends and the rear ends of the top and the bottom of the right side of the wall body, an assembly type intelligent fire hydrant body is arranged on the right side of the wall body, and clamping boxes are fixedly connected to the top and the bottom of the left side of the assembly type intelligent fire hydrant body. Grooves are formed in the front ends and the rear ends of the left sides of the clamping boxes, bayonets used in cooperation with the clamping plates are formed in the left sides of the grooves, clamping assemblies are arranged in the grooves, and switch assemblies are arranged at the tops of the clamping boxes. The problems that an existing assembly type intelligent fire hydrant is inconvenient to install, needs to be installed through various tools, is not provided with a certain quick installation structure, wastes time during installation, and is inconvenient to use are solved, the quick assembly type intelligent fire hydrant has the beneficial effect of being quick to install, and the practicability of the assembly type intelligent fire hydrant is improved.

The invention discloses an aligning and balancing part for corners of floor tiles and a use method thereof. The aligning and balancing part comprises a seat body and connecting rib walls, wherein the connecting rib walls are vertically arranged on the upper surface of the seat body and equally divides the upper surface of the seat body into a connecting zone A, a connecting zone B, a connecting zone C and a connecting zone D with equal area; and the height of each connecting rib wall is larger than the thickness of each connected floor tile. The aligning and balancing part disclosed by the invention has the advantages that by arrangement of the seat body, the seat body is provided with the connecting rib walls which are mutually vertical, the corners of the adjacent floor tiles are clamped at the zone A, the zone B, the zone C and the zone D by utilizing the connecting rib walls; since the connecting part is made of PP (Polypropylene), HDPE (High-Density Polyethylene) and PVC (Polyvinyl Chloride) and the hardness is less than that of the floor tiles, certain stressed cushioning effect is achieved, the corners of the paved floor tiles are prevented from being damaged, the width of the corner joints of the adjacent floor tiles is uniform, the staggering phenomenon of the corners is avoided and the efficiency and the aesthetic effect of pavement are improved.

A dodging rod fixing device comprises a fixing assembly and an adjusting and supporting assembly. The fixing assembly is used for directly fixing a dodging rod and comprises a base body and a first fastening assembly, a fastening counter bore is formed in one end of the base body, a rectangular light-in positioning through hole leading to the fastening counter bore is formed in the other end of the base body, the dodging rod is arranged in the base body from the rectangular light-in positioning through hole and penetrates through the fastening counter bore, and the first fastening assembly isinstalled in the fastening counter bore so as to fix the dodging rod. The adjusting and supporting assembly is used for supporting and fixing the fixing assembly and comprises a supporting base body and a second fastening assembly, a supporting and positioning stepped hole is formed in the supporting base body and comprises a supporting stepped hole body and a light emitting positioning through hole, and the base body is arranged in the supporting stepped hole body; the light emitting surface of the dodging rod is located in the light emitting positioning through hole or penetrates through thelight emitting positioning through hole, and the second fastening assembly compresses the base body. The dodging rod fixing device has the beneficial effects that the dodging rod can be in full contact with air, and the center of the dodging rod is prevented from deviating.

The invention relates to the technology for opening cable trench cover plates, in particular to a mechanical lifting device for cable trench cover plates in substations and switching stations. The invention solves the problems that the existing cable trench cover plate opening technology easily leads to poor sealing performance of the cable trench cover plate, consumes time and effort, and easily causes accidental injury to construction personnel. The mechanical lifting device for the cable trench cover of substations and switching stations includes a bracket part and a lifting part; the lifting part includes a Z-shaped handle, a chain, a hook, and a three-claw suction cup; the upper end of the first chain is wound and fixed on the Z The first horizontal edge of the crank handle; the first hook is fixed on the lower end of the first chain; the middle part of the second chain is hung on the first hook; the second hook and the third The suspension hooks are respectively fixed on the two ends of the second chain; the handles of the two three-claw suction cups are respectively hung on the second suspension hook and the third suspension hook. The invention is applicable to the opening of the cable trench cover plate.

The invention relates to the technical field of special folders, and discloses a portable device special for an auditor. The portable device comprises a panel, an auxiliary plate, a drawing plate, a business card pocket and a note pocket, wherein the panel is located at the left end of a connecting piece and is fixedly connected with the connecting piece, the auxiliary plate is located at the leftend of the panel and is fixedly connected with the panel, the drawing plate is located on the front surface of the auxiliary plate and is fixedly connected with the auxiliary plate, and the businesscard pocket is located above the left side of the front surface of the auxiliary plate. According to the portable device, the auxiliary plate is arranged, the drawing plate is arranged on the front surface of the auxiliary plate, a drawing pen can be used for temporarily drawing corresponding review logic relation graph list data and the like on the drawing plate to help the auditor to understand,and the audit process can be promoted; and classification notes are arranged, so that audit files can be divided by utilizing classification labels, the subsequent searching is facilitated, the subsequent audit working efficiency is improved, the function of the folder is enhanced, the practicability of the folder is improved, and the working and using requirements of the auditor are met.

The invention discloses a concrete baffle with a corner protection side. The concrete baffle is characterized in that a concrete baffle body is arranged on the outer lateral side of the top face of an upper flange plate of a steel beam in the installation direction of the steel beam, the cross section of the concrete baffle body is of a vertical rectangular half-frame structure, the rectangular half-frame structure is formed by a single-side upper edge plate, a single-side lower edge plate and a web connected between the single-side upper edge plate and the single-side lower edge plate, an opening of the rectangular half-frame structure faces the side where a floor supporting plate is located, the single-side lower edge plate of the concrete baffle body and the steel beam are fixedly connected, and cast-in-place concrete is flush with the upper edge plate of the concrete baffle body in height. By means of the concrete baffle, grout leakage is prevented in the ground cast-in-place concrete construction, it is guaranteed that the edges of a cast-in-place concrete building floor are perfectly formed, and the firmness of the concrete edges is improved.

The invention provides an automatic sorting method of customized furniture plate element vertical placement transmission. The method is characterized by comprising a setting work procedure, a feedingwork procedure, a sorting work procedure and a material discharging work procedure which are sequentially executed, wherein in the setting work procedure, the corresponding relationship of each plateelement and plate element vertical placement space of the sorting device is respectively set; in the feeding work procedure, each plate element of the current batch to be sorted is subjected to information scanning in a grouped way, and the vertical and parallel feeding is performed; and in the sorting work procedure, a moving device carries the plate element to move, so that one-by-one correspondence between the plate element vertical placement space of the moving device where the plate element is positioned and the corresponding plate element vertical placement space position of the sortingdevice is realized, and the plate element is conveyed into the sorting device from the moving device, so that the goal of arranging each plate element in the set plate element vertical placement spaceof the sorting device is achieved. The sorting method provided by the invention has the advantages that the automatic plate element sorting can be realized, so that the packaging of the plate elementby workers in the subsequent work procedure can be convenient; the production efficiency is improved; the missing placement and the wrong placement of the plate element are prevented; and the occupied area is reduced.

The invention belongs to the technical field of reflector packaging, and discloses a method for fixing a coated optical fiber reflector, comprising: setting a quartz package with a through groove, and making the notch of the through groove upward; Gel is injected into the groove to form a first gel layer, and the outer surface of the first gel layer facing the notch through the groove is a support plane, so that the support plane and the notch through the groove Arranging at intervals; extending one end of the coated optical fiber into the through groove, so that the part of the coated optical fiber extending into the through groove extends along the through direction of the through groove, and is placed on the support plane Above: gel is injected into the through groove to form a second gel layer, so that the second gel layer encapsulates part of the coated optical fiber in the through groove. In the present invention, the quartz package can release the deformation of the package gel itself when it expands with heat and contracts with cold through the opening on one side of the groove.

Provided are a fiber-reinforced building formwork and a preparation method thereof. The fiber-reinforced building formwork comprises a board core and face layers covering the upper surface and the lower surface of the board core; the board core comprises multiple layers of veneers which are bonded into a whole and have wood fibers, and the directions of the wood fibers of the adjacent veneers are mutually perpendicular; each face layer comprises 1-4 fiber-reinforced prepreg sheet layers which are connected into a whole in a composited mode, each fiber-reinforced prepreg sheet layer is formed by compositing fiber products and high-molecular resin, and each face layer and the board core are connected into a whole through a bonding layer. After the building formwork is boiled for two hours in boiling water in a pressure cooker and cooled for one hour at room temperature, the retention rate of the static bending intensity is at least 90%, and the retention rate of the static bending modulus is at least 90%. The formwork is excellent in mechanical property, good in waterproof and breakage-proof property and long in service life, and the per-use cost of the formwork is reduced; use of wood is avoided, and therefore the formwork is more environmentally friendly.