364 results about "Sandwich panel" patented technology

The invention belongs to the technical field of composite material structures and energy storage, and discloses a multifunctional energy storage composite structure of an embedded lithium ion battery and a preparation method of the multifunctional energy storage composite structure. The composite structure comprises an upper-layer skin, a lower-layer skin and an integrated energy storage layer located in the middle. The integrated energy storage layer comprises a sandwich panel and an energy storage unit; the sandwich panel is provided with a honeycomb or a grid; the energy storage units are embedded into honeycombs or grids of the sandwich panel; the raw materials of the upper-layer skin and the lower-layer skin are at least one layer of fiber prepreg. Through the application of the epoxy resin fiber composite material (fiber prepreg), the battery pack body becomes a part of the structure, electrical-structural integration is realized, an independent metal battery shell is not needed, the weight is reduced, and the bearing capacity and the heat-conducting and electrical-conducting properties of fibers are fully utilized; a hot-pressing integrated process is adopted for preparation, the technological process is simple and feasible, and the manufacturing cost is reduced.

The invention provides a replaceable phase-change temperature-adjusting modular composite color steel sandwich panel and a preparation method thereof.The replaceable phase-change temperature-adjusting modular composite color steel sandwich panel is characterized in that phase-change heat preservation blankets, substrates and heat conduction adjusting layers of different specifications are adopted, and the phase-change heat preservation blankets of different specifications are distinguished according to different phase-change temperature ranges; the base plate comprises an upper surface layer color steel plate, a core material and a lower surface layer color steel plate, and a heat conduction adjusting layer is evenly distributed on the outer surface of the upper surface layer color steel plate. The phase change heat preservation blanket is installed on the outer surface of the heat conduction adjusting layer in a magnetic attraction positioning and sliding groove clamping and embedding mode. A plurality of heat conduction pieces are arranged on the side, facing the heat conduction adjusting layer, of the phase change heat preservation blanket, and an RFID tag is arranged on the side, away from the heat conduction adjusting layer, of the phase change heat preservation blanket. By means of the split design of the phase change heat preservation blanket and the base plate, the phase change heat preservation blanket suitable for the environment temperature can be replaced according to the environment temperature change, and seasonal heat management is achieved.

The invention discloses a roof sandwich plate and embedded part composite connecting structure for a rail transit vehicle and a process of the roof sandwich plate and embedded part composite connecting structure, and relates to the technical field of mechanical connecting structures. The multi-layer composite board is composed of an upper panel, a lower panel and a light core material, the pre-buried metal section bar is installed on the edge of the board through a glue joint layer, the framework edge beam is arranged on the board in a sleeved mode through a clamping groove and is in glue joint with the upper panel and the lower panel, and the framework edge beam, the upper panel and the lower panel are mechanically connected and fixed through the mechanical locking unit. By means of the composite connection structure of glue joint and mechanical locking, the connection strength of the roof sandwich plate and the embedded part is guaranteed, the reliability and durability of connection are improved, and the comprehensive requirements of rail transit vehicles for high reliability, high durability and light weight of the roof structure are met.

The invention relates to the technical field of aerospace structure safety, and discloses a flying bird anti-collision device with a foamed aluminum sandwich energy-absorbing structure, the flying bird anti-collision device comprises an assembly frame and an outer frame as the device, the corners of the outer side of the assembly frame are provided with assembly cylinders, and the assembly frame is assembled in the head of an aircraft through the assembly cylinders; the front panel is arranged on the inner side of the assembly frame and is used for bearing a first collision impact; the buffering assembly is arranged on the inner side of the assembling frame and used for buffering the first impact; the sandwich board is arranged on the inner side of the assembly frame and used for bearing the buffered impact; and the rear panel is arranged on the inner side of the assembly frame and is used for bearing the impact which is buffered twice. Through ordered hierarchical arrangement of the front panel, the buffer assembly, the foamed aluminum sandwich panel and the rear panel, a synergistic energy absorption system and a multi-structure synergistic gradient protection mechanism are constructed, impact is decomposed into a plurality of controllable energy dissipation stages, and efficient management and dissipation of impact energy are achieved.

This utility model discloses a waterproof structure for lightweight aggregate concrete partition walls, relating to the technical field of concrete partition walls. It includes an autoclaved aerated concrete (AAC) plate, with two foamed sandwich panels fixed to its outer wall. Gypsum board is fixed to the side of each foamed sandwich panel that is far from each other. A reinforcing plate extends from one side of the AAC plate, and a retaining strip extends from the side of the reinforcing plate away from the AAC plate. A retaining groove is formed between the end of the AAC plate away from the reinforcing plate and the two foamed sandwich panels. The AAC plate, reinforcing plate, and retaining strip are integrated. Through the AAC plate, reinforcing plate, retaining strip, retaining groove, main reinforcing groove, and secondary reinforcing groove, the overall structural strength of the wall can be enhanced. Simultaneously, the wall is spliced ​​using a retaining method, and the space at the splice can be used to pour cement slurry, filling the splice to increase the stress points of the wall and improve the overall strength of the wall.

The application relates to a ship composite material corrugated sandwich panel structure and a forming method thereof. A plurality of first foam corrugated strips and second foam corrugated strips are pre-assembled in an up-down staggered mode, a plurality of first foam corrugated strips are connected to form a first foam corrugated assembly through a glass fiber mat, a second fiber cloth is laid on the first foam corrugated assembly through a row-by-row die assembly process, a second foam corrugated strip is laid on the second fiber cloth, a glass fiber mat with glue is laid on the plurality of second foam corrugated strips, a third fiber cloth is laid on the glass fiber mat, a reinforcing rib member is laid on the outer side of the third fiber cloth and is wrapped with the fiber cloth, a preformed body is completed, and finally, a composite corrugated sandwich panel is obtained through vacuum pouring. The application is simple and convenient to operate, controllable preparation of a corrugated-foam hybrid core material is realized, process problems of a complex structure in forming precision, interface combination and form control are solved, and a feasible manufacturing approach is provided for practical application of the complex structure in a lightweight shell of a ship.

Provided is an antenna integrated structure in which an antenna is inserted into ground vehicle, marine ship and aircraft structure, and more particularly, a sandwich panel type antenna integrated latticecore having a structure for improving communication performance of an antenna module.

The utility model discloses a sound insulation type composite color steel sandwich plate which comprises a composite color steel plate, a protruding strip is fixedly connected to one side of the upper end of the composite color steel plate, four grooves are evenly formed in the protruding strip, threaded holes are fixedly formed in the middles of the interiors of the grooves and one side end of the composite color steel plate, and the threaded holes are communicated with the protruding strip. A plurality of threaded holes are formed in the convex strips, threaded connecting pieces are connected into the threaded holes, a plurality of clamping plates are arranged and attached to the convex strips, clamping blocks are fixedly connected to the lower ends of the clamping plates, and the clamping blocks are inserted into the upper ends of the interiors of the grooves. The section cutting plane of the clamping plate is of the arc-shaped structure, so that the clamping plate and the protruding strip are attached more tightly, the threaded connecting piece in the groove is sealed through the clamping plate, water is not prone to accumulating in the groove, the threaded connecting piece in the groove is not prone to being affected by rainwater erosion, and the service life of the threaded connecting piece is prolonged. And the service life of the threaded connecting piece is prolonged.

A support box apparatus includes longitudinal members that span forward to aft and transverse members that span inboard to outboard between the longitudinal members. The longitudinal members and the transverse members are formed of composite honeycomb sandwich panels. The support box apparatus also includes attachment components configured to couple the longitudinal members or the transverse members to structural components of an aircraft, electrical wiring attached to the longitudinal members or the transverse members, environmental control system (ECS) ducting attached to the longitudinal members or the transverse members, and life support lines attached to the longitudinal members or the transverse members.

A composite material layer, the composite material layer comprising a curable resin which is in the form of a solid layer at 20°C, wherein the composite material layer comprises a prepreg comprising a

Sandwich panels 174, 176, 178 are produced by simultaneously and continuously applying outer layers 122, 124 to the top 108 and bottom 110 faces of an elongate thermoplastic foam panel 102. The outer

The application provides a high-efficiency damping device and method based on a surface wave damping mechanism phononic crystal sandwich structure, and belongs to the field of ship damping and noise reduction. The device solves the problems of poor low-frequency damping effect, narrow damping frequency band and high cost-effectiveness ratio of existing damping devices. The device comprises a high-damping bearing panel, a damping liquid capsule, a phononic crystal sandwich panel and a bottom plate structure. The bottom plate structure is connected with a ship plate, the phononic crystal sandwich panel is fixed on the bottom plate structure, the damping liquid capsule is arranged on the phononic crystal sandwich panel, and the high-damping bearing panel is arranged on the damping liquid capsule. The damping liquid capsule comprises a liquid capsule body and a liquid capsule limiting mechanism. The liquid capsule limiting mechanism is fixed on the phononic crystal sandwich panel, the liquid capsule body is arranged in a space surrounded by the liquid capsule limiting mechanism, and the liquid capsule body is filled with fluid medium. The phononic crystal sandwich panel comprises an upper panel, a lower panel and a phononic crystal array. The phononic crystal array comprises a plurality of local resonance phononic crystals. The application is suitable for effective damping of ship mechanical equipment during operation.

The embodiment of the utility model provides arc-shaped laminboard cutting equipment. The arc-shaped laminboard cutting equipment comprises a material table; the two longitudinal sliding rails are arranged on the two sides of the material table; the at least one transverse sliding rail is arranged on the longitudinal sliding rail; the sliding rail driving device is arranged on the material table and is connected with the transverse sliding rail through a transmission assembly; the cutting saw is connected to the transverse sliding rail and provided with a plurality of saw blades arranged at intervals; the cutting driving device is arranged on one side of the transverse sliding rail and connected with the cutting saw through a driving assembly. According to the technical scheme, after a plate needing to be cut is placed on the material table, the cutting saw can move along the transverse sliding rail so that the plate can be cut, and after one position is cut, the transverse sliding rail and the cutting saw move along the longitudinal sliding rail together so that the cutting position can be changed. When the arc-shaped laminboard cutting equipment is used for cutting and processing the laminboard, the laminboard does not need to be moved repeatedly, the risk of scratching the laminboard is avoided, a plurality of slots can be cut at the same time, the processing efficiency is high, and the processing quality is good.

The utility model relates to the technical field of color steel plate splicing, and discloses a splicing structure of a color steel sandwich plate, which comprises two color steel plates, the left side of one of the color steel plates is fixedly connected with a positioning component for mounting the other color steel plate, the top end of the left side of one of the color steel plates is fixedly connected with a plurality of connecting blocks, and the connecting blocks are fixedly connected with the top end of the right side of the other color steel plate. A clamping groove is formed in the bottom of the left side of the connecting block, a plurality of mounting shells are fixedly connected to the interior of the right side of the other color steel plate, a connecting plate is fixedly connected to the bottom end of the interior of each mounting shell, a supporting plate is fixedly connected to the top of each connecting plate, and a limiting groove is formed in the top of each supporting plate. According to the utility model, the engineering project can be delivered and used more quickly, the time cost is reduced, the working efficiency can be improved by quick splicing, more workload can be completed within limited time, the flexibility of the construction process can be enhanced, and field changes can be coped with in time.

The application relates to the field of household decorative plate industrial production, in particular to a composite method, device, system, equipment and medium for an asymmetric aluminum sandwich plate, which comprises the following steps: determining a loading proportionality coefficient between a first aluminum roll and a second aluminum roll according to a first thickness corresponding to the first aluminum roll and a second thickness corresponding to the second aluminum roll; the loading proportionality coefficient is used for representing a ratio relationship of the required tensile force of the first aluminum roll and the second aluminum roll under the condition of applying the same transverse displacement; calculating a target tensile force corresponding to the other aluminum roll according to a first preset tensile force corresponding to any aluminum roll and the loading proportionality coefficient, and then compositing the two first aluminum rolls and the second aluminum roll according to the corresponding tensile forces to obtain the asymmetric aluminum sandwich plate. According to the application, the tensile forces of the two aluminum rolls with different thicknesses can be determined before the composition, so that the two aluminum rolls have the same tensile strain, and the symmetric aluminum sandwich plate without the stress warping problem can be obtained through the composition.

This utility model discloses a composite adhesive uniform spraying device for processing rock wool sandwich panels, a green building material. It relates to the technical field of green building material processing equipment. The device includes a base, with two support plates fixedly connected to the upper surface of the base. A top plate is fixedly connected to the upper end of each support plate. An inner groove is formed on the lower surface of the top plate, and a lead screw is rotatably connected inside the inner groove. A movable seat is threadedly connected to the outer surface of the lead screw. Two second hydraulic rods are fixedly installed on the lower surface of the movable seat. A lifting plate is fixedly connected to the output end of each second hydraulic rod. Several linearly arranged composite adhesive spraying heads are fixedly connected to the lower surface of the lifting plate. The advantages of this utility model are: the scraper ensures the uniformity of the composite adhesive spraying thickness on the surface of the rock wool sandwich panel, improving product quality; the collection trough reduces material waste while maintaining a clean working environment and reducing cleaning costs.

The invention discloses a light-weight high-strength sound-insulation integrated wood-bamboo-based sandwich board structure and a manufacturing method, and belongs to the technical field of bamboo-wood composite materials, and the structure comprises an upper surface board, a lower surface board and a core layer frame. The texture directions of the upper surface board and the lower surface board are kept consistent; the core layer frame, the upper surface board and the lower surface board are of an orthogonal structure, and the core layer frame is formed by arranging a plurality of wood-bamboo-based unit frames in an array mode. The wood-bamboo-based unit frame is composed of reinforcing ribs and porous connecting units. And the core layer frame, the upper surface board and the lower surface board are pressed into an integral structure by adopting an adhesive such as phenolic resin adhesive, urea-formaldehyde resin adhesive or polyurethane adhesive through a hot-pressing or cold-pressing forming method, so that the connection and quick assembly of the wood-bamboo-based integrated sound insulation sandwich board are realized, and the problems that the existing bamboo laminated board is insufficient and heavy in silence, low in cost and the like are solved. The bamboo sandwich board is weak in bearing capacity, high in cost and low in production efficiency.

The application discloses a CFRP honeycomb aluminum sandwich plate impact energy prediction method fusing an attention mechanism, and comprises the following steps: performing a drop hammer impact simulation test on a CFRP honeycomb aluminum sandwich laminate to obtain damage images corresponding to different initial impact energy conditions, and constructing a data set by using the damage images; adding an attention mechanism in a deep learning network model to obtain a deep learning network model fusing the attention mechanism; dividing the data set into a training set, a verification set and a test set; taking the damage images as input and the initial impact energy as output, training the deep learning network model fusing the attention mechanism to obtain an impact energy prediction model of a damaged CFRP honeycomb aluminum sandwich laminate; acquiring a damage image of an actual damaged CFRP honeycomb aluminum sandwich laminate, inputting the impact energy prediction model of the damaged CFRP honeycomb aluminum sandwich laminate, and outputting the initial impact energy received by the damaged CFRP honeycomb aluminum sandwich laminate by the prediction model.

The application discloses a dot-matrix sandwich plate structure with vibration reduction characteristics, belongs to the field of vibration control, and can solve the problem of difficulty in multifunctional integrated design of structure bearing and low-frequency broadband gap vibration reduction. The dot-matrix sandwich plate structure is composed of dot-matrix sandwich cells containing local resonance microstructures and arranged periodically in two-dimensional directions; the dot-matrix sandwich cell is composed of two slotted thin panels, double-pyramid Kagome rod system dot-matrix and resonators; the realization of the resonance microstructure is that a steel cylinder is additionally arranged at the center of the elastic short beam through slotting on the panel, so that the vibration reduction frequency of the structure can be effectively reduced; the application can realize effective vibration suppression in a low-frequency band and can be used for vibration reduction facilities with bearing requirements.

The utility model relates to the technical field of laminboard cutting, in particular to a laminboard cutting mechanism which comprises two cutting assemblies and a support, each cutting assembly comprises a mounting base, a linkage rod, two mounting boxes, a fixing piece and a cutter body, worms are arranged at the two ends of each linkage rod, connecting rods are rotationally arranged in the two mounting boxes, and the two ends of each connecting rod are provided with screws. According to the laminboard cutting mechanism, worm wheels are arranged on the connecting rods, the connecting rods in the two mounting boxes are in linkage through chain wheels and chains, through the two cutting assembly structures, the synchronism and stability of the cutting action are ensured, meanwhile, the cutting force is effectively dispersed, the blade is prevented from being bent, and the cutting effect of foam laminboards can be remarkably improved through the laminboard cutting mechanism; and the cutting surface is smooth and the blade is not easy to bend.

The invention relates to a sandwich panel comprising a photovoltaic active area positioned on the outer sheet and whose electrical connectors are positioned in a first cavity positioned within the insulation material and adjacent to either one of the sides of the insulation material or the inner sheet so that the electrical connectors can be accessed from the first cavity.

The utility model relates to the technical field of pad printing machine workbench height adjustment, and discloses a pad printing machine workbench height fine adjustment assembly which comprises a sandwich plate, the bottom of the sandwich plate is fixedly connected with a bottom plate, the top of the bottom plate is fixedly connected with a supporting shell, and the left side of the interior of the supporting shell is slidably connected with a rack. The top of the rack penetrates through the supporting shell, a transmission rod is rotationally connected to the upper middle portion of the front side of the supporting shell, the rear end of the transmission rod penetrates through the supporting shell and is fixedly connected with a gear, and the left side of the gear is connected with the rack in an engaged mode. The rack is driven to move upwards through meshing transmission of the gear, the working frame is jacked up to achieve rapid rough adjustment, the worm gear drives the lead screw to rotate, the supporting column moves upwards along the lead screw to continue to enable the working frame to ascend, fine adjustment is achieved, and the working frame can be rapidly adjusted to a proper position through combination of rough adjustment and fine adjustment. And the production efficiency is improved.

The utility model provides a heat insulation sandwich panel for a combined refrigeration house, which comprises an outer layer panel, an inner layer panel and an outer layer panel, the inner-layer substrate is used for providing internal support; the heat insulation filling material is filled between the outer-layer panel and the inner-layer substrate and is used for reducing heat conduction; the splicing frames are arranged on the edges of the two sides of the sandwich board and used for being connected with other sandwich boards; the lock catch groove is formed in the outer side of the splicing frame on one side; the splicing frame on the other side is provided with a lock catch groove, the splicing flange is arranged on the outer side of the splicing frame on the other side, the splicing flange comprises a gradually-changed section to enhance the attaching performance, the lock catch groove is matched with the splicing flange in an embedded mode to achieve fastening between the adjacent sandwich boards, and the inner wall of the splicing frame is provided with a groove; the grooves are filled with sealing gaskets so as to improve the sealing performance when the adjacent sandwich boards are spliced. Through the scheme of the embodiment of the invention, the cold bridge effect can be reduced.

The utility model relates to the technical field of laminboard production, and discloses an automatic discharging mechanism for polyurethane laminboard production, which comprises a working table, a conveying belt is mounted at the top of the working table, an automatic discharging mechanism is arranged at the top of the working table, two limiting columns are fixedly connected to the top of the working table and are respectively positioned on two sides of the conveying belt, and the conveying belt is arranged on the conveying belt. A limiting column is arranged on the top of the workbench, a fixing mechanism is arranged in the limiting column, a connecting column is slidably connected into the limiting column, one end of the connecting column is fixedly connected with a guide plate, an auxiliary assembly is arranged on the top of the workbench, and the automatic discharging mechanism comprises an electric push rod which is installed on the top of the workbench. According to the utility model, the electric push rod drives the push plate to automatically unload materials, and the rubber plate is flexibly contacted with the sandwich plate, so that impact is buffered, and surface damage is prevented. The rubber plate is detachable and convenient to replace and maintain. And compared with a traditional hard structure, the unloading safety and the durability of equipment are improved.

The utility model belongs to the technical field of thermal insulation materials, and discloses a thermal insulation sandwich board which comprises an upper layer board, a nanometer silicon composite thermal insulation board and a lower layer board body. The nanometer silicon composite heat insulation plate is located between the upper-layer plate body and the lower-layer plate body, and further comprises a splicing mechanism and a sealing assembly. The splicing mechanism comprises a T-shaped protrusion arranged on the first side edge of the heat preservation sandwich panel and a dovetail groove arranged on the second side edge of the heat preservation sandwich panel, a magnetic metal strip is embedded in the T-shaped protrusion, and a magnetic attraction piece is arranged in the dovetail groove. According to the heat preservation sandwich plate, the nanometer silicon composite heat insulation plate is adopted as a heat preservation core material, the heat resistance and the mechanical strength are optimized, the heat conductivity coefficient of the sandwich plate is obviously reduced, the heat insulation performance is improved, the compression resistance and the bending resistance are improved, the service life is prolonged, and the thickness of the plate is reduced. And self-locking splicing is adopted, gelling-free rapid installation is achieved, the installation process is simplified, the sealing performance of joints is improved, and the construction cost is reduced.

This utility model discloses an automatic glue-applying device for the core material of a magnesium oxide sandwich panel, relating to the field of magnesium oxide sandwich panel processing technology. It includes a base plate and a support frame fixedly mounted on the top of the base plate. The support frame has a longitudinal drive mechanism inside, connected to a connecting frame via the longitudinal drive mechanism. Two symmetrically arranged support rods are rotatably mounted on the outer wall of the connecting frame. Glue-applying rollers are fixedly sleeved on the walls of the support rods. Two symmetrically arranged mounting frames are fixedly mounted on the top of the connecting frame. A glue dispensing box is fixedly mounted at the upper end of the mounting frame, with an open bottom that contacts the outer wall of the glue-applying roller. An electric push rod is fixedly mounted on the back side of the base plate, and a support seat is fixedly mounted at the end of the output shaft of the electric push rod. Baffles are slidably sleeved on both lower ends of the support seat, and an elastic component is provided between the baffles and the support seat. This utility model enables simultaneous double-sided glue application to the core material using glue-applying rollers on both sides, improving glue-applying efficiency.

The invention provides a multi-stage sandwich plate and a preparation method and application thereof, the multi-stage sandwich plate comprises at least two composite material plates, and the composite material plates are prepared from continuous fibers and a resin matrix; the honeycomb core materials are arranged between the two adjacent composite material plates; the cross-linked foam is arranged between the composite material plate and the honeycomb core material, one side of the cross-linked foam is connected with the composite material plate, and the other side of the cross-linked foam is connected with the honeycomb core material. According to the multi-stage sandwich plate in the scheme, the weight of the structure can be reduced on the premise that the rigidity, the bending resistance and the deformation resistance of the structure are ensured, and the technical problem that the weight of a battery protection system in the prior art is large is solved.

The utility model relates to the technical field of buildings, and discloses a color steel sandwich panel mobile house convenient to mount and dismount, which comprises a plurality of walls, the top ends of the plurality of walls are detachably connected with a roof, the inner sides of the two walls are respectively provided with a fixing component for providing stable support, the top ends of the inner walls of the walls are connected with sliding columns in a sliding manner, and the top ends of the inner walls of the walls are fixedly connected with the roof. A clamping block is fixedly connected to the inner side of the sliding column, a button is fixedly connected to the outer side of the sliding column, a supporting ring is slidably connected to the outer portion of the sliding column, the sliding column is sleeved with a first spring, a plug strip is fixedly connected to the outer portion of the supporting ring, and a ventilation assembly used for adjusting the ventilation quantity is slidably connected to the inner wall of one wall body. According to the utility model, firstly, the four wall bodies are erected, then the angle iron is placed at the included angle between every two wall bodies, then the sliding columns are inserted, and then the top ends of the four wall bodies are covered with the roof, so that the quick splicing of the mobile house is completed, and the cost and the time are saved.

The invention relates to a roof high-rigidity light-weight sandwich plate for a road traffic vehicle and a manufacturing process, and belongs to the technical field of vehicle roof sandwich plates, the roof high-rigidity light-weight sandwich plate comprises an upper panel, a lower panel and a light core material, and the light core material is clamped between the upper panel and the lower panel and fixedly connected through a bonding layer; a connecting sleeve is arranged on the plate face, facing the light core material, of the lower panel, the axis direction of the connecting sleeve is perpendicular to the lower panel, an inserting rod is arranged on the plate face, facing the light core material, of the upper panel, the axis direction of the inserting rod is perpendicular to the upper panel, and when the light core material is clamped by the upper panel, the inserting rod is inserted into the connecting sleeve. The fixing piece is used for fixing the inserting rod into the connecting sleeve; and the end part of the connecting sleeve is in an inverted cone shape. The connecting structure has the effect of improving the connecting stability of the sandwich plate.

The utility model relates to a metal -faced polyurethane sandwich panel for building, it is designed to solve the current traditional rock wool sandwich panel hygroscopic, physical foaming agent hulling and high thermal conductivity of full water foaming polyurethane technical problem, including upper and lower two metal surface layers and the polyurethane core material of middle, upper and lower the metal surface layer and polyurethane core material are pasted and contact, polyurethane core material is made through full water foaming process and foaming agent is the carbon dioxide of water and isocyanate reaction generation, the utility model discloses full water foaming technology replaces physical foaming agent, through optimizing combination polyol formula and production process, the heat preservation performance is significantly improved, and the structure stability of sandwich panel under the building load -bearing and extreme temperature environment is guaranteed simultaneously.