CN114131954A - Preparation method of grid structure reinforced foam sandwich composite material based on secondary forming - Google Patents
Preparation method of grid structure reinforced foam sandwich composite material based on secondary forming Download PDFInfo
- Publication number
- CN114131954A CN114131954A CN202111244890.7A CN202111244890A CN114131954A CN 114131954 A CN114131954 A CN 114131954A CN 202111244890 A CN202111244890 A CN 202111244890A CN 114131954 A CN114131954 A CN 114131954A
- Authority
- CN
- China
- Prior art keywords
- grid structure
- composite material
- auxiliary tool
- tool sub
- components
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 136
- 239000006260 foam Substances 0.000 title claims abstract description 116
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 83
- 239000011162 core material Substances 0.000 claims abstract description 62
- 230000008569 process Effects 0.000 claims abstract description 60
- 239000000835 fiber Substances 0.000 claims description 81
- 239000004744 fabric Substances 0.000 claims description 73
- 238000000465 moulding Methods 0.000 claims description 35
- 239000003292 glue Substances 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- 239000003365 glass fiber Substances 0.000 claims description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 238000001721 transfer moulding Methods 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- -1 polymethacrylimide Polymers 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000003321 amplification Effects 0.000 abstract description 5
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 5
- 239000011229 interlayer Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 15
- 239000010410 layer Substances 0.000 description 9
- 229920000049 Carbon (fiber) Polymers 0.000 description 8
- 239000004917 carbon fiber Substances 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000003733 fiber-reinforced composite Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000004620 low density foam Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011208 reinforced composite material Substances 0.000 description 1
- 238000009745 resin transfer moulding Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000009755 vacuum infusion Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/1228—Joining preformed parts by the expanding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/18—Filling preformed cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/56—After-treatment of articles, e.g. for altering the shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention provides a preparation method of a grid structure reinforced foam sandwich composite material based on secondary forming, which is characterized in that the composite material grid structure is prefabricated in the first step, foam core materials are filled in the second step, upper and lower panels are laid, and then the composite material grid structure is integrally formed by adopting a conventional forming process of the composite material, so that the process amplification is easily realized, and the process risk is obviously reduced; the thickness and the shape of the grid structure can be accurately controlled through a simple auxiliary tool, and the problems that the size of an interlayer preformed body is difficult to accurately control, the overall stability and the quality consistency of a product are high and the like in the forming process of the grid structure reinforced foam sandwich composite material are fundamentally solved; meanwhile, the preparation of the reinforced foam sandwich composite material with different types of grid structures can be realized through the geometric configuration design of the auxiliary tool sub-components and the space design between the adjacent sub-components; moreover, the auxiliary tool is easy to operate, low in manufacturing cost, large in design margin, simple to assemble and capable of being rapidly assembled and disassembled, and the preparation efficiency of the preformed body is remarkably improved.
Description
Technical Field
The invention relates to a preparation method of a sandwich structure composite material, in particular to a preparation method of a grid structure reinforced foam sandwich composite material based on secondary forming, which is mainly applied to low-cost and high-quality forming of the grid structure reinforced foam sandwich composite material, especially a large-size grid structure reinforced foam sandwich composite material.
Background
The traditional foam sandwich composite material is formed by compounding upper and lower composite material panels with higher strength and modulus and a low-density foam sandwich material between the upper and lower panels, and has higher specific strength and specific rigidity; meanwhile, the low-density foam sandwich material has the functions of fire prevention, heat insulation, sound insulation, energy absorption and the like. Therefore, the traditional foam sandwich composite material becomes a typical structure and function integrated material and is widely applied to the fields of rail transit, high-speed trains, aerospace, ships, ocean engineering and the like. However, with the ever-increasing requirements of engineering applications on structural properties, the traditional foam sandwich composite materials have been unable to meet the requirements. The grid structure of the composite material is introduced into the foam sandwich material of the traditional foam sandwich composite material to construct a novel sandwich structure composite material, namely, the grid structure reinforced foam sandwich composite material, wherein the main part of the grid structure reinforced foam sandwich composite material is the traditional foam sandwich composite material, and the reinforced part is the composite material grid structure. Therefore, grid structure reinforcing foam core composite material has integrateed traditional foam core composite material and the advantage of combined material grid structure separately, has both kept advantages such as the lower density of traditional foam core composite material, higher strength, higher modulus, has played the outstanding mechanical properties of composite material grid structure again, promptly: on the premise that the overall density is slightly increased, the mechanical properties of the grid structure reinforced foam sandwich composite material such as flat pressure, side pressure, bending, shearing, impact resistance and the like are remarkably improved.
However, due to the introduction of composite grid structures, the foam core board, originally as a whole, is divided into individual discrete foam core strips. When the interlayer preforming body is prepared, the dry fiber fabric is subjected to resin infiltration molding, namely, the composite material grid structure and the foam core material strips are alternately laid, the dry fiber fabric is inserted among the discrete foam core material strips in a wave shape, the foam core material strips are semi-coated by the dry fiber fabric, and the geometric form of the dry fiber fabric is an antisymmetric structure. In order to improve the fitting degree between adjacent foam core material strips and between the foam core material strips and the dry-state fiber fabric as much as possible and reduce local wrinkles of the dry-state fiber fabric as much as possible, a certain tension is required to be applied to the dry-state fiber fabric, and the foam core material strips attached to the dry-state fiber fabric are broken out due to the fact that the density of the foam core material is lower than or equal to 400kg/m3 and the antisymmetric structure with a certain tension. In addition, even if the foam core material strips and the dry fiber fabric are alternately laid according to the operation, the preformed body which is originally well jointed can be loosened again, so that the prepared laminated preformed body is irregular in arrangement, uneven in overall thickness and uneven in thickness of the grid structure, and the appearance size and quality consistency of the grid structure reinforced foam sandwich composite material are influenced.
The grid structure reinforced foam sandwich composite material is a novel composite material sandwich structure, and no open and complete forming process solution is available at present. The invention relates to a lattice reinforced composite sandwich structure (with an authorization publication number of CN 101067343B), which is prepared by splitting a core material in the thickness direction, filling resin or dry fiber cloth in a split gap position and performing a vacuum infusion process, wherein the lattice is a resin cast body or a fiber reinforced composite material, and the reinforcing effect of the fiber reinforced composite material lattice is far better than that of the resin cast body lattice. However, the dry fiber cloth is soft, the filling amount of the fiber cloth in the gaps of the core material is difficult to control, and the fiber cloth is easy to accumulate, bend and the like under vacuum pressure, so that the volume fraction, the quality consistency and the like of the lattice fibers of the fiber reinforced composite material are difficult to accurately control, and the lattice reinforcing effect is greatly reduced, and the performance discreteness of the sandwich structure of the lattice reinforced composite material is obviously improved. In addition, in the molding process described in the published literature, either the manufacturing cost is low but the quality consistency is poor, or the quality consistency is good but the manufacturing cost is high. From published reports, Nanjing industry university at home prepares a grid structure reinforced foam sandwich composite material, namely: cutting the foam core material into cube blocks, coating six faces with glass fiber cloth in a manual winding mode, orderly arranging the foam cube blocks coated with the glass fiber cloth on the paved lower panel, paving the upper panel, and finally forming by a VARI (vacuum assisted resin injection) process. The method realizes the successful preparation of the grid structure reinforced foam sandwich composite material, has low preparation cost, but the prepared product has the advantages of difficult quality uniformity and size stability control, difficult enlargement of the forming process, uneven grid structure thickness and high resin content. The foam sandwich composite material with the grid structure reinforced in the laboratory, which has the cross section of rectangle, trapezoid, triangle and other different shapes, is successfully prepared by adopting a VARTM (vacuum applied resin transfer molding) molding process in Kingston University, Iranta Atdales University, Kingston University and Tarbiat University, abroad, and the like, and the quality consistency is better, but the explanation of the related molding process in the public report is extremely simple, and the technical details of tool design, process scheme and the like are not disclosed yet. In addition, in consideration of the problem of process amplification, the auxiliary tool needs to change the design, thicken to prevent deformation, block splicing and the like, so that the complexity of the auxiliary tool is increased, and finally, the manufacturing cost based on the VARTM forming process is greatly increased and the difficulty of process amplification is obviously increased.
The grid structure reinforced foam sandwich composite material has the structural characteristics that foam core materials are completely discrete and dry fiber fabrics are inserted in the grid structure reinforced foam sandwich composite material in an antisymmetric manner, so that the biggest difficulty in the forming process is the accurate dimension and the overall stability control of a sandwich preformed body, and the key for solving the difficulty is the accurate control of the position of the foam core materials and the thickness and the shape of a grid structure. Under the condition of higher requirement on mechanical property, the VARI process or RTM process based on a high-precision metal mold is mostly adopted for integrated forming, and the prepared large-size grid structure reinforced foam sandwich composite material has excellent mechanical property but higher process difficulty and manufacturing cost; under the condition of allowing a certain mechanical property to be sacrificed and not greatly reducing the size precision, the structural stability and the quality consistency of products, the preparation method of the grid structure reinforced foam sandwich composite material based on secondary forming has the characteristics of obviously reducing the process difficulty and the manufacturing cost, and is an excellent solution for the forming process of the grid structure reinforced foam sandwich composite material.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for preparing a grid structure reinforced foam sandwich composite material based on secondary molding, so as to solve the problem that a novel composite material sandwich structure, namely a grid structure reinforced foam sandwich composite material, is not available at present, and a low-cost high-precision preparation method is provided.
In order to achieve the purpose, the invention adopts the technical scheme that: the preparation method of the grid structure reinforced foam sandwich composite material based on secondary forming comprises the following steps:
s1, auxiliary tool machining: designing the shape and size of the auxiliary tool sub-component according to the configuration of the target composite material grid structure;
s2, assembling auxiliary tool sub-components upright: bonding the bottoms of a plurality of upright auxiliary tool sub-components on a die according to the configuration of a target composite material grid structure, wherein the auxiliary tool sub-components are arranged in parallel at intervals; then wiping the surface of each auxiliary tool sub-component with alcohol or acetone, airing for about 5 minutes, and then uniformly coating demolding wax for 3 times, wherein the interval is 10-15 minutes each time;
s3, paving a composite material grid structure by adopting dry fiber cloth or prepreg: paving dry fiber cloth/prepreg along the cross section direction of a plurality of upright auxiliary tool sub-components, and prepressing the corners in time in the paving process to ensure that the dry fiber cloth/prepreg is tightly attached to the surfaces of the auxiliary tool sub-components;
s4, placing the auxiliary tool sub-components upside down: placing inverted auxiliary tool sub-components one by one in a plurality of gaps at the top of the dry fiber cloth/prepreg, and compacting the inverted auxiliary tool sub-components by using transverse bars to enable the surfaces of the dry fiber cloth/prepreg and the auxiliary tool sub-components to be tightly attached to form a grid structure intermediate;
s5, prefabricating a composite material grid structure: when a dry fiber cloth scheme is selected, prefabricating the intermediate of the grid structure by adopting an RTM (resin transfer molding) or VARTM (vacuum transfer molding) process to form a composite grid structure;
if the prepreg scheme is selected, transferring the intermediate body of the grid structure onto a press platform, and prefabricating by adopting a mould pressing process according to pressure-time and temperature-time molding process parameters required by the selected prepreg; or transferring the intermediate body of the grid structure into an autoclave, and prefabricating by adopting an autoclave process according to the pressure-time and temperature-time molding process parameters required by the selected prepreg; or transferring the intermediate body of the grid structure into an oven, and prefabricating by adopting an OOA process according to pressure-time and temperature-time molding process parameters required by the selected prepreg to form a composite grid structure;
s6, spreading the following boards: cleaning the die, and then paving a lower panel on the die;
s7, filling foam core material strips: spraying a proper amount of spray glue on the surface of the prepared composite material grid structure, processing a foam core material strip according to the size of an auxiliary tool sub-component, filling the foam core material strip into the prefabricated composite material grid structure to form the composite material grid structure filled with the foam core material, and then stably placing the whole composite material grid structure on a lower panel;
s8, paving an upper panel: laying a panel on the composite material grid structure filled with the foam core material to form a preformed body;
s9, integral forming: and performing integral packaging molding on the preformed body by adopting a composite material conventional molding process LCM.
Further, in step S2, when the auxiliary tool sub-component is bonded, all or part of the bottom of the auxiliary tool sub-component is coated with an adhesive, a glue, or a double-sided tape.
Further, when the lower panel and the upper panel are laid, the laying requirement is as follows, the number of layers of the fiber fabric to be laid and the laying mode are determined according to the target thickness of the panel and the type of the selected reinforced fiber fabric, then the fiber fabric is cut, and the cut fiber fabric is laid according to the laying mode.
Furthermore, the size of the fiber fabric laid on the lower panel and the upper panel is 5mm-50mm larger than the plane size of the composite material grid structure.
Further, the cross-sectional shape of the auxiliary tool sub-component includes, but is not limited to, any one of a rectangle, a trapezoid and a triangle.
Furthermore, the number of the auxiliary tool sub-components is 2N +1, and N is more than or equal to 1.
Furthermore, the cross section size of the minimum repeating unit of the composite material grid structure is the same as that of the auxiliary tool sub-component, the length of the minimum repeating unit is 0-50mm smaller than that of the auxiliary tool sub-component, and the thickness of the composite material grid structure is 0.1-10 mm.
Furthermore, the surface density of the dry fiber cloth, the prepreg, the lower panel and the upper panel is not less than 100g/m2And the fiber fabrics used in the four are all glass fibers, carbon/glass hybrid fibers, quartz fibers, Kevler fibers, ultra-high molecular weight polyethylene fibers or PB0 fibers, and the types of the fiber fabrics used in the four can be the same or different. The thickness, the layering mode and the type of the fiber fabrics used can be the same or different between the upper panel and the lower panel.
Further, the foam core material strip is made of polyvinyl chloride, polymethacrylimide, polyethylene terephthalate or polyurethane, and the density is not more than 400kg/m3。
Furthermore, the cross section shape of the foam core material strip is the same as that of the auxiliary tool sub-component, and the lengths of the foam core material strip and the auxiliary tool sub-component are also the same.
Compared with the prior art, the invention has the beneficial effects that: firstly, the composite material grid structure is prefabricated in a secondary forming mode, the foam core material is filled in the secondary forming mode, the upper panel and the lower panel are paved, and then the composite material grid structure is integrally formed by adopting a composite material conventional forming process LCM, so that process amplification is easily realized, and process risks are obviously reduced; secondly, the thickness and the shape of the grid structure can be accurately controlled through a simple auxiliary tool consisting of a plurality of auxiliary tool sub-components, so that the problems that the size of an interlayer preformed body is difficult to accurately control, the overall stability and the quality consistency of a product are high and the like in the forming process of the grid structure reinforced foam sandwich composite material are fundamentally solved; thirdly, the preparation of the reinforced foam sandwich composite material with different types of grid structures can be realized through the geometric configuration design of the auxiliary tool sub-components and the space design between the adjacent sub-components; fourthly, the auxiliary tool is easy to operate, low in manufacturing cost, large in design margin, simple to assemble and capable of being rapidly assembled and disassembled, and the preparation efficiency of the preformed body is remarkably improved; fifthly, the auxiliary tool is simple in manufacturing process, convenient to disassemble and mature in the whole process flow, and the forming efficiency of the large-size grid structure reinforced foam sandwich composite material can be remarkably improved.
Drawings
FIG. 1 is a schematic structural view of an auxiliary tool sub-assembly;
FIG. 2 is a schematic diagram of the main steps in the preparation of a composite grid structure;
FIG. 3 is a schematic structural view of a composite grid structure;
FIG. 4 is a schematic structural view of a grid structure reinforced foam sandwich composite preform;
the labels in the figure are: 1. the auxiliary tool comprises an auxiliary tool subcomponent, 2, a composite material grid structure, 3, dry fiber cloth/prepreg, 4, a lower panel, 5, a foam core strip, 6, an upper panel, 7 and a mould.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.
Referring to fig. 2, a method for preparing a grid structure reinforced foam sandwich composite material based on secondary forming mainly comprises the following steps:
s1, auxiliary tool machining: designing the shape and size of an auxiliary tool sub-component 1 according to the configuration of a target composite material grid structure 2, wherein the schematic diagram of the auxiliary tool sub-component is shown in FIG. 1;
s2, assembling auxiliary tool sub-components upright: bonding the bottoms of a plurality of upright auxiliary tool sub-components 1 on a die 7 according to the configuration of a target composite material grid structure 2, wherein the auxiliary tool sub-components 1 are arranged in parallel at intervals; when the auxiliary tool sub-component 1 is bonded, the bottom of the auxiliary tool sub-component 1 is completely or partially coated with an adhesive, glue or a double-sided adhesive tape; then wiping the surface of each auxiliary tool sub-component 1 with alcohol or acetone, airing for about 5 minutes, and then uniformly coating demolding wax for 3 times at an interval of 10-15 minutes each time;
s3, paving a composite material grid structure by adopting dry fiber cloth or prepreg: paving dry fiber cloth/prepreg 3 along the cross section direction of the upright auxiliary tool sub-components 1, and prepressing the corners in time in the paving process to enable the dry fiber cloth/prepreg 3 to be tightly attached to the surfaces of the auxiliary tool sub-components 1;
s4, placing the auxiliary tool sub-components upside down: placing the inverted auxiliary tool sub-components 1 one by one in a plurality of gaps at the top of the dry fiber cloth/prepreg 3, and compacting the inverted auxiliary tool sub-components 1 by using transverse bars to enable the dry fiber cloth/prepreg 3 to be tightly attached to the surfaces of the auxiliary tool sub-components 1 to form a grid structure intermediate;
s5, prefabricating a composite material grid structure: if a dry fiber cloth scheme is selected, prefabricating the intermediate of the grid structure by adopting an RTM (resin transfer molding) or VARTM (vacuum transfer molding) process to form a composite grid structure 2;
if the prepreg scheme is selected, transferring the intermediate body of the grid structure onto a press platform, and prefabricating by adopting a mould pressing process according to pressure-time and temperature-time molding process parameters required by the selected prepreg; or transferring the intermediate body of the grid structure into an autoclave, and prefabricating by adopting an autoclave process according to the pressure-time and temperature-time molding process parameters required by the selected prepreg; or transferring the intermediate body of the grid structure into an oven, and prefabricating by adopting an OOA process according to pressure-time and temperature-time molding process parameters required by the selected prepreg to form a composite grid structure 2; the structure schematic diagram of the composite material grid structure is shown in FIG. 3;
s6, spreading the following boards: cleaning the mould, and then paving a lower panel 4 on the mould;
s7, filling foam core material strips: spraying a proper amount of spray glue on the surface of the prepared composite material grid structure 2, processing a foam core material strip 5 according to the size of the auxiliary tool subassembly 1, filling the foam core material strip into the prefabricated composite material grid structure 2 to form the composite material grid structure filled with the foam core material, and then stably placing the whole composite material grid structure on a lower panel3(ii) a The cross-sectional shape of the foam core material strip 5 is the same as that of the auxiliary tool sub-assembly 1, and the lengths of the foam core material strip and the auxiliary tool sub-assembly are also the same.
S8, paving an upper panel: laying a panel 6 on the composite material grid structure filled with the foam core material to form a preformed body, wherein the structural schematic diagram of the preformed body is shown in FIG. 4; when the lower panel 4 and the upper panel 6 are paved, the paving requirement is as follows, the number of layers of fiber fabrics needing to be paved and the paving mode are determined according to the target thickness of the panel and the type of the selected reinforced fiber fabrics, then the fiber fabrics are cut, and the cut fiber fabrics are paved according to the paving mode. And the size of the fibre fabric laid on the lower and upper panels 4, 6 is 5-50 mm larger than the planar size of the composite grid structure 2.
S9, integral forming: and performing integral packaging molding on the preformed body by adopting a composite material conventional molding process LCM.
Furthermore, the auxiliary tool in the invention is composed of 2N +1 (N is more than or equal to 1) identical sub-components 1, the material is metal material, wood material and other hard materials with high rigidity, and the processing tolerance is +/-0.2 mm. From the perspective of composite material structure design, the cross section of the sub-assembly 1 can be selected from simple geometric shapes such as rectangle, trapezoid, triangle, etc., and can also be selected from other shapes. The length of the auxiliary tool sub-component 1 is 300mm-3000 mm.
Further, the cross section size of the minimum repeating unit of the composite material grid structure 2 is the same as that of the auxiliary tool sub-component 1, the length of the minimum repeating unit is 0-50mm smaller than that of the auxiliary tool sub-component 1, and the thickness of the composite material grid structure 2 is 0.1-10 mm.
In the invention, the surface density of the dry fiber cloth, the prepreg, the lower panel 4 and the upper panel 6 is not less than 100g/m2And the fiber fabrics used in the four are all glass fibers, carbon/glass hybrid fibers, quartz fibers, Kevler fibers, ultra-high molecular weight polyethylene fibers or PB0 fibers, and the types of the fiber fabrics used in the four can be the same or different. The thickness, the layering mode and the type of the fiber fabrics used can be the same or different between the upper panel and the lower panel.
Example one
The first embodiment is a grid structure reinforced foam sandwich composite material with a grid structure, wherein the cross section of the minimum repeating unit of the grid structure is an isosceles trapezoid, wherein the isosceles trapezoid has the size of 20mm at the upper bottom, 66.2mm at the lower bottom and 40mm at the height.
The length of the upper panel is 1245mm, the length of the lower panel is 1295mm, and the width and the thickness of the upper panel and the lower panel are the same, namely 1070mm and 2.7mm respectively; the length and the thickness of the grid structure are 1070mm and 0.25mm respectively; the cross section of the foam core material strip is isosceles trapezoid, the number of the foam core material strip is 29, the length of the foam core material strip is 1070mm, and the cross section size is 20mm at the upper bottom, 66.2mm at the lower bottom and 40mm in height.
The auxiliary tool sub-parts cross section is isosceles trapezoid, and the quantity is 29, and length is 1070mm, and the cross sectional dimension is 20mm at the bottom of the upper plate, 66.2mm at the bottom of the lower plate, high 40mm, and adjacent auxiliary tool sub-parts interval is 21.7mm, and the material is 45# steel.
The upper and lower panels are made of 8 layers of biaxial high-strength glass fiber cloth with the surface density of 350g/m 2; the surface density of the grid structure is 200 g/m2And 2 layers of carbon fiber prepregs.
The preparation process of the grid structure reinforced foam sandwich composite material comprises the following steps:
(a) and (5) processing an auxiliary tool. And (4) processing auxiliary tool sub-components according to the grid structure configuration design parameters, wherein 45# steel is selected as the material.
(b) And (4) assembling auxiliary tool sub-components vertically. The metal flat plate die is cleaned, then double-sided adhesive tapes are pasted at two ends and the middle of the bottom of each auxiliary tool sub-component and are stably bonded on the metal flat plate die, and the adjacent sub-components are parallelly and uniformly distributed at the interval of 20.7 mm. Cleaning each sub-part of the bonded and sequenced auxiliary tool by using alcohol or acetone, airing for about 5 minutes, and then uniformly coating 3 times of demolding wax at an interval of 10-15 minutes each time.
(c) The composite grid structure is laid with carbon fiber prepreg. Lay along upright auxiliary fixtures sub-part cross section direction and lay carbon fiber prepreg, lay and apply the in-process and in time carry out the pre-compaction to the corner, make carbon fiber prepreg and the tight laminating in frock sub-part surface as far as possible.
(d) The auxiliary tool sub-components are placed in an inverted manner. And (3) inverting the carbon fiber prepregs one by one to place auxiliary tool sub-components, and compacting the inverted sub-components by using the transverse bars to enable the surfaces of the carbon fiber prepregs and the tool sub-components to be tightly attached.
(e) And (4) prefabricating a composite material grid structure. And (3) rotating the auxiliary tool, the prepreg and the metal flat plate die together onto a die press platform, and setting the die press according to the pressure-time and temperature-time molding process parameters required by the selected prepreg to complete the molding of the grid structure and the demolding.
(f) The lower panel 4 is laid. And determining the number of layers of the fiber fabric to be laid, the laying mode and the like according to the target thickness of the panel and the type of the selected reinforced fiber fabric, wherein the size of the fiber fabric is 10mm larger than the plane size of the composite material grid structure, and cutting the fiber fabric according to the method. Cleaning the metal flat plate die, and paving the cut fiber fabric according to a paving mode.
(g) And filling foam core material strips. Spraying a proper amount of 3M spraying glue on the surface of the prepared composite material grid structure at the speed of 30cm/s, processing a foam core material strip according to the size of an auxiliary tool sub-component, filling the foam core material strip into the prefabricated composite material grid structure, forming the composite material grid structure filled with the foam core material, and stably placing the whole composite material grid structure on a lower panel.
(h) And (4) paving the upper panel. And paving an upper panel on the composite material grid structure filled with the foam core material, wherein the paving requirement is the same as that of the lower panel.
(i) And (4) integral molding. According to the VARI forming process, sequentially arranging demolding cloth, a flow guide net and the like, arranging a glue injection pipeline, a glue outlet, a glue injection port and the like, packaging and vacuumizing a vacuum bag film, and completing integral forming after glue injection. And demolding after curing for 48 hours at normal temperature, and then putting into an oven for curing at the temperature of 50 ℃/4 hours.
Example two
The second embodiment is a grid structure reinforced foam sandwich composite material with a grid structure, wherein the cross section of the minimum repeating unit of the grid structure is an isosceles trapezoid, wherein the size of the isosceles trapezoid is 20mm at the upper bottom, 66.2mm at the lower bottom and 40mm at the height.
The length of the upper panel is 1245mm, the length of the lower panel is 1295mm, and the width and the thickness of the upper panel and the lower panel are the same, namely 1070mm and 2.7mm respectively; the length and the thickness of the grid structure are 1070mm and 0.25mm respectively; the cross section of the foam core material strip is isosceles trapezoid, the number of the foam core material strip is 29, the length of the foam core material strip is 1070mm, and the cross section size is 20mm at the upper bottom, 66.2mm at the lower bottom and 40mm in height.
The auxiliary tool sub-parts cross section is isosceles trapezoid, and the quantity is 29, and length is 1070mm, and the cross sectional dimension is 20mm at the bottom of the upper plate, 66.2mm at the bottom of the lower plate, high 40mm, and adjacent auxiliary tool sub-parts interval is 21.2mm, and the material is 45# steel.
The upper and lower panels have a selected areal density of 350g/m2The number of the biaxial high-strength glass fiber cloth is 8; the surface density of the grid structure is 200 g/m2And 2 layers of carbon fiber prepregs.
Except for the step (e), the preparation process of the grid structure reinforced foam sandwich composite material in the second embodiment is the same as that in the first embodiment. Example two steps (e) are:
(e) and (4) prefabricating a composite material grid structure. And (3) rotating the auxiliary tool, the prepreg and the metal flat plate mould together into an autoclave, setting the autoclave according to pressure-time and temperature-time molding process parameters required by the selected prepreg, and completing the molding of the grid structure and demoulding.
EXAMPLE III
In the third embodiment, the cross section of the smallest repeating unit of the grid structure is an isosceles trapezoid-shaped grid structure reinforced foam sandwich composite material, wherein the isosceles trapezoid is 20mm in upper base, 66.2mm in lower base and 40mm in height.
The length of the upper panel is 1245mm, the length of the lower panel is 1295mm, and the width and the thickness of the upper panel and the lower panel are the same, namely 1070mm and 2.7mm respectively; the length and the thickness of the grid structure are 1070mm and 0.25mm respectively; the cross section of the foam core material strip is isosceles trapezoid, the number of the foam core material strip is 29, the length of the foam core material strip is 1070mm, and the cross section size is 20mm at the upper bottom, 66.2mm at the lower bottom and 40mm in height.
The auxiliary tool sub-parts cross section is isosceles trapezoid, and the quantity is 29, and length is 1070mm, and the cross sectional dimension is 20mm at the bottom of the upper plate, 66.2mm at the bottom of the lower plate, high 40mm, and adjacent auxiliary tool sub-parts interval is 21.2mm, and the material is 45# steel.
The upper and lower panels have a selected areal density of 350g/m2The number of the biaxial high-strength glass fiber cloth is 8; the surface density of the grid structure is 200 g/m2And 2 layers of carbon fiber prepregs.
The preparation process of the grid structure reinforced foam sandwich composite material described in the third embodiment is the same as that of the first embodiment except for the step (i). The three steps (i) of the example are:
(i) and (4) integral molding. According to the RTM forming process, the preformed body is placed in a die cavity, and glue injection is started after die assembly, so that integral forming is completed. And demolding after curing for 48 hours at normal temperature, and then putting into an oven for curing at the temperature of 50 ℃/4 hours.
Example four
Example four is a grid structure reinforced foam sandwich composite material in which the cross section of the smallest repeating unit of the grid structure is rectangular, wherein the rectangular dimension is 40mm in width and 25mm in height.
The upper panel and the lower panel have the same size, and the length, the width and the thickness are 855mm, 950mm and 3.5mm respectively; the length and the thickness of the grating structure are 950mm and 0.22mm respectively; the cross section of the foam core material strip is rectangular, the number of the foam core material strip is 21, and the length, the width and the height of the foam core material strip are respectively 950mm, 40mm and 25 mm.
The cross section of each auxiliary tool sub-component is rectangular, the number of the auxiliary tool sub-components is 21, the length, the width and the height of each auxiliary tool sub-component are respectively 950mm, 40mm and 25mm, the distance between every two adjacent auxiliary tool sub-components is 40.7mm, and the auxiliary tool sub-components are made of wood.
The surface density of the fiber fabrics for the upper and lower panels is 400 g/m2The E glass fiber checked cloth has 10 layers; the dry fiber fabric for the grid structure has the surface density of 220 g/m2The quantity of the satin high-strength glass fiber cloth is 1 layer.
The preparation process of the grid structure reinforced foam sandwich composite material is the same as that of the first embodiment.
According to the invention, through a secondary forming mode, namely, a composite material grid structure is prefabricated in the first step, the foam core material is filled in the second step, the upper panel and the lower panel are laid, and then the composite material grid structure is integrally formed by adopting a conventional forming process of the composite material, the process amplification is easily realized, and the process risk is obviously reduced; the thickness and the shape of the grid structure can be accurately controlled through a simple auxiliary tool, and the problems that the size of an interlayer preformed body is difficult to accurately control, the overall stability and the quality consistency of a product are high and the like in the forming process of the grid structure reinforced foam sandwich composite material are fundamentally solved; meanwhile, the preparation of the reinforced foam sandwich composite material with different types of grid structures can be realized through the geometric configuration design of the auxiliary tool sub-components and the space design between the adjacent sub-components; moreover, the auxiliary tool is easy to operate, low in manufacturing cost, large in design margin, simple to assemble and capable of being rapidly assembled and disassembled, and the preparation efficiency of the preformed body is remarkably improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The preparation method of the grid structure reinforced foam sandwich composite material based on secondary forming is characterized by comprising the following steps of:
s1, auxiliary tool machining: designing the shape and size of the auxiliary tool sub-component (1) according to the configuration of the target composite material grid structure (2);
s2, assembling auxiliary tool sub-components upright: bonding the bottoms of a plurality of upright auxiliary tool sub-components (1) on a mould according to the configuration of a target composite material grid structure (2), wherein the auxiliary tool sub-components (1) are arranged in parallel at intervals; then wiping the surface of each auxiliary tool sub-component (1) with alcohol or acetone, airing for about 5 minutes, and then uniformly coating demolding wax for 3 times at an interval of 10-15 minutes each time;
s3, paving a composite material grid structure by adopting dry fiber cloth or prepreg: paving dry fiber cloth/prepreg (3) along the cross section direction of a plurality of upright auxiliary tool sub-components (1), and prepressing the corners in time in the paving process to ensure that the dry fiber cloth/prepreg (3) is tightly attached to the surface of the auxiliary tool sub-components (1);
s4, placing the auxiliary tool sub-components upside down: placing inverted auxiliary tool sub-components (1) one by one in a plurality of gaps at the top of the dry fiber cloth/prepreg (3), and compacting the inverted auxiliary tool sub-components (1) by using transverse strips to enable the dry fiber cloth/prepreg (3) to be tightly attached to the surfaces of the auxiliary tool sub-components (1) to form a grid structure intermediate;
s5, prefabricating a composite material grid structure: if a dry fiber cloth scheme is selected, prefabricating the intermediate of the grid structure by adopting an RTM (resin transfer molding) or VARTM (resin transfer molding) process to form a composite grid structure (2);
if the prepreg scheme is selected, transferring the intermediate body of the grid structure onto a press platform, and prefabricating by adopting a mould pressing process according to pressure-time and temperature-time molding process parameters required by the selected prepreg; or transferring the intermediate body of the grid structure into an autoclave, and prefabricating by adopting an autoclave process according to the pressure-time and temperature-time molding process parameters required by the selected prepreg; or transferring the intermediate body of the grid structure into an oven, and prefabricating by adopting an OOA process according to pressure-time and temperature-time molding process parameters required by the selected prepreg to form a composite grid structure (2);
s6, spreading the following boards: cleaning the mould, and then paving a lower panel (4) on the mould;
s7, filling foam core material strips: spraying a proper amount of spray glue on the surface of the prepared composite material grid structure (2), processing a foam core material strip (5) according to the size of the auxiliary tool sub-component (1) and filling the foam core material strip into the prefabricated composite material grid structure (2) to form the composite material grid structure filled with the foam core material, and then stably placing the whole composite material grid structure on the lower panel;
s8, paving an upper panel: laying a top panel (6) on the composite material grid structure filled with the foam core material to form a preformed body;
s9, integral forming: and performing integral packaging molding on the preformed body by adopting a composite material conventional molding process LCM.
2. The method for preparing the grid structure reinforced foam sandwich composite material based on the secondary molding according to claim 1, wherein the method comprises the following steps: in the step S2, when the auxiliary tool sub-component (1) is bonded, the bottom of the auxiliary tool sub-component (1) is completely or partially coated with an adhesive, glue or a double-sided tape.
3. The method for preparing the grid structure reinforced foam sandwich composite material based on the secondary molding according to claim 1, wherein the method comprises the following steps: when the lower panel (4) and the upper panel (6) are laid, the laying requirement is as follows, the number of layers of fiber fabrics to be laid and the laying mode are determined according to the target thickness of the panel and the type of the selected reinforced fiber fabrics, then the fiber fabrics are cut, and the cut fiber fabrics are laid according to the laying mode.
4. The method for preparing the grid structure reinforced foam sandwich composite material based on the secondary molding according to claim 1, wherein the method comprises the following steps: the size of the fiber fabrics laid on the lower panel (4) and the upper panel (6) is 5mm-50mm larger than the plane size of the composite material grid structure (2).
5. The method for preparing the grid structure reinforced foam sandwich composite material based on the secondary molding according to claim 1, wherein the method comprises the following steps: the cross-sectional shape of the auxiliary tool sub-component (1) comprises any one of a rectangle, a trapezoid and a triangle.
6. The method for preparing the grid structure reinforced foam sandwich composite material based on the secondary molding according to claim 5, wherein the method comprises the following steps: the number of the auxiliary tool sub-components (1) is 2N +1, and N is larger than or equal to 1.
7. The method for preparing the grid structure reinforced foam sandwich composite material based on the secondary molding according to claim 6, wherein the method comprises the following steps: the cross section size of the minimum repeating unit of the composite material grid structure (2) is the same as that of the auxiliary tool sub-component (1), the length of the minimum repeating unit is 0-50mm smaller than that of the auxiliary tool sub-component (1), and the thickness of the composite material grid structure (2) is 0.1-10 mm.
8. The method for preparing the grid structure reinforced foam sandwich composite material based on the secondary molding according to claim 1, wherein the method comprises the following steps: the surface density of the dry fiber cloth, the prepreg, the lower panel (4) and the upper panel (6) is not less than 100g/m2And the fiber fabrics used in the four are all glass fibers, carbon/glass hybrid fibers, quartz fibers, Kevler fibers, ultra-high molecular weight polyethylene fibers or PB0 fibers.
9. The method for preparing the grid structure reinforced foam sandwich composite material based on the secondary molding according to claim 1, wherein the method comprises the following steps: the foam core material strip (5) is made of polyvinyl chloride, polymethacrylimide, polyethylene terephthalate or polyurethane, and has a density of not more than 400kg/m3。
10. The method for preparing the grid structure reinforced foam sandwich composite material based on the secondary molding according to claim 9, wherein the method comprises the following steps: the cross section shape of the foam core material strip (5) is the same as that of the auxiliary tool sub-component (1), and the lengths of the foam core material strip and the auxiliary tool sub-component are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111244890.7A CN114131954B (en) | 2021-10-26 | Preparation method of grid structure reinforced foam sandwich composite material based on secondary molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111244890.7A CN114131954B (en) | 2021-10-26 | Preparation method of grid structure reinforced foam sandwich composite material based on secondary molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114131954A true CN114131954A (en) | 2022-03-04 |
| CN114131954B CN114131954B (en) | 2024-06-28 |
Family
ID=
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114801258A (en) * | 2022-03-09 | 2022-07-29 | 中国船舶重工集团公司第七二五研究所 | Preparation method of bidirectional grid structure reinforced foam sandwich composite material |
| CN114801259A (en) * | 2022-03-09 | 2022-07-29 | 中国船舶重工集团公司第七二五研究所 | Preparation method of interlocking type bidirectional grid structure reinforced foam sandwich composite material |
| CN117141012A (en) * | 2023-10-31 | 2023-12-01 | 廊坊市飞泽复合材料科技有限公司 | Foam material reinforcing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06229035A (en) * | 1993-01-29 | 1994-08-16 | Ig Tech Res Inc | Core material |
| DE19715529C1 (en) * | 1997-04-14 | 1998-08-06 | Daimler Benz Aerospace Airbus | Composite sandwich structure for use in structural components of aircraft |
| RU2381132C1 (en) * | 2008-09-19 | 2010-02-10 | Открытое акционерное общество "Центр технологии судостроения и судоремонта" (ОАО "ЦТСС") | Method to produce three-layer panel central layer from composite material with polymer binder |
| CN104842593A (en) * | 2015-03-24 | 2015-08-19 | 中山大学 | Carbon fiber honeycomb structure and preparation method therefor |
| CN113400677A (en) * | 2021-06-23 | 2021-09-17 | 中国船舶重工集团公司第七二五研究所 | Auxiliary die and preparation method of grid structure reinforced foam sandwich composite material |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06229035A (en) * | 1993-01-29 | 1994-08-16 | Ig Tech Res Inc | Core material |
| DE19715529C1 (en) * | 1997-04-14 | 1998-08-06 | Daimler Benz Aerospace Airbus | Composite sandwich structure for use in structural components of aircraft |
| RU2381132C1 (en) * | 2008-09-19 | 2010-02-10 | Открытое акционерное общество "Центр технологии судостроения и судоремонта" (ОАО "ЦТСС") | Method to produce three-layer panel central layer from composite material with polymer binder |
| CN104842593A (en) * | 2015-03-24 | 2015-08-19 | 中山大学 | Carbon fiber honeycomb structure and preparation method therefor |
| CN113400677A (en) * | 2021-06-23 | 2021-09-17 | 中国船舶重工集团公司第七二五研究所 | Auxiliary die and preparation method of grid structure reinforced foam sandwich composite material |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114801258A (en) * | 2022-03-09 | 2022-07-29 | 中国船舶重工集团公司第七二五研究所 | Preparation method of bidirectional grid structure reinforced foam sandwich composite material |
| CN114801259A (en) * | 2022-03-09 | 2022-07-29 | 中国船舶重工集团公司第七二五研究所 | Preparation method of interlocking type bidirectional grid structure reinforced foam sandwich composite material |
| CN114801258B (en) * | 2022-03-09 | 2024-05-10 | 中国船舶重工集团公司第七二五研究所 | Preparation method of bidirectional grille structure reinforced foam sandwich composite material |
| CN117141012A (en) * | 2023-10-31 | 2023-12-01 | 廊坊市飞泽复合材料科技有限公司 | Foam material reinforcing method |
| CN117141012B (en) * | 2023-10-31 | 2024-05-24 | 廊坊市飞泽复合材料科技有限公司 | Foam material reinforcing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101628481B (en) | Forming mould of large-sized composite material-made reinforcing wall plate by vacuum assisted resin infusion | |
| CN108045010B (en) | Multilayer composite material foam sandwich board and preparation method thereof | |
| AU2002326922B2 (en) | Three-dimensional knit spacer fabric sandwich composite | |
| CN112454938A (en) | Forming method of carbon fiber honeycomb sandwich composite material member | |
| CN112677362B (en) | Preforming body for forming grid reinforced foam sandwich composite material and forming method thereof | |
| CN102431184B (en) | Technological method for forming multiple composite plates in one step | |
| AU2002326922A1 (en) | Three-dimensional knit spacer fabric sandwich composite | |
| CN113400677B (en) | Auxiliary die and preparation method of grid structure reinforced foam sandwich composite material | |
| CN103538715A (en) | Composite material pi-type lug interface and integral co-curing forming method | |
| CN110500242B (en) | Main beam of wind power blade and method for laying core material and plate of main beam | |
| CN103252929A (en) | Imitating eastward diving beetle wing case plate and preparation method thereof | |
| CN111231442A (en) | Large-size multi-axial composite material bearing plate taking pultruded profile as sandwich and preparation method thereof | |
| CN104999672A (en) | Molding method of double-curvature variable-section variable-thickness through beam | |
| CN114801237A (en) | Forming method of full-height edge-covered sandwich composite material part | |
| CN103909659B (en) | A kind of method of resin film infusion moulding resin based composites | |
| CN114131954A (en) | Preparation method of grid structure reinforced foam sandwich composite material based on secondary forming | |
| KR20200081074A (en) | Manufacturing method of sandwich panel and sandwich panel manufacturing by the same | |
| CN110978560B (en) | Foam sandwich structure wallboard and forming method thereof | |
| CN114131954B (en) | Preparation method of grid structure reinforced foam sandwich composite material based on secondary molding | |
| CN103010321B (en) | A kind of lightweight flat bed trailer car body and manufacture method thereof | |
| CN114801258B (en) | Preparation method of bidirectional grille structure reinforced foam sandwich composite material | |
| CN204036988U (en) | A kind of transhipment is dull and stereotyped | |
| CN114211787B (en) | Preparation method of carbon fiber laminated plate with multilayer space structure | |
| CN110978672A (en) | Integrally formed sandwich structure and process | |
| CN217197233U (en) | Micro-nano colloidal fiber coagulation structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |