CN112959691A - Manufacturing method of carbon fiber composite shielding shelter based on autoclave process - Google Patents
Manufacturing method of carbon fiber composite shielding shelter based on autoclave process Download PDFInfo
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- CN112959691A CN112959691A CN202110159893.4A CN202110159893A CN112959691A CN 112959691 A CN112959691 A CN 112959691A CN 202110159893 A CN202110159893 A CN 202110159893A CN 112959691 A CN112959691 A CN 112959691A
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- 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
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- 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
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
- B29C70/222—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure being shaped to form a three dimensional configuration
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to the technical field of military shelter preparation, in particular to a carbon fiber composite shielding shelter manufacturing method based on autoclave process, which combines the carbon fiber composite electromagnetic protection technology with the composite shelter integrated manufacturing process, greatly reduces the weight, adopts a mode of combining metal-plated carbon fibers with shielding metal nets in the electromagnetic reinforcement mode of the shelter composite, ensures the realizability of a shielding structure while not obviously enhancing the component density, and ensures the excellent electromagnetic sealing performance while ensuring the reliability of connection by finally adopting an electrical lap joint processing mode of the connecting part of a shelter cabin body and a cabin door; the electromagnetic pulse protection capability of the carbon fiber composite material is improved by utilizing an electromagnetic strengthening treatment means between layers of the composite material, and the electromagnetic strengthening composite material structure between the layers and the foam interlayer are used as the material of the bulkhead of the equipment, so that the shelter is made into an integral structure, light in weight and excellent in electromagnetic protection effect.
Description
Technical Field
The invention relates to the technical field of military shelter preparation, in particular to a carbon fiber composite shielding shelter manufacturing method based on an autoclave process.
Background
The weight reduction of the military shelter has become a key research direction in the field, but the weight reduction design does not leave the advanced composite material technology, and how to adopt the composite material as the replacement of the original main material of the metal cabin body and ensure the electromagnetic protection function of the shelter product is a difficult point which is urgently needed to be solved at present. The main approach of improving the shielding effectiveness of the existing composite material equipment cabin is still in the aspects of material performance and connection structure, the design concept of the equipment cabin still continues the design mode of the traditional metal cabin body, the molding manufacturing characteristics of the composite material and the electromagnetic enhancement design mode cannot be combined, a large number of gaps caused by splicing structures exist, and the shielding effectiveness of the composite material equipment cabin body is reduced.
Chinese patent CN 105644631a "carbon fiber shelter" reports a carbon fiber composite material shielding shelter, which comprises a plurality of carbon fiber composite boards, outer wrapping corners, pressing strips, carbon fiber doors and the like, has the three-proofing functions of rain proofing, dust proofing, temperature insulation, mould proofing, salt fog proofing and damp and heat proofing, and has a certain electromagnetic shielding function.
In summary, at present, the existing composite material electromagnetic shielding cabin is mostly spliced, and the design and manufacturing method of the electromagnetic shielding composite material cabin with an integrated structure is not reported. At present, the cabin body composite material design is still mostly manufactured by splicing a large metal plate square cabin, and the shielding efficiency of the cabin body is reduced due to the fact that a conducting layer caused by splicing is discontinuous. Particularly, after the composite material is used as a main material of the cabin body wall plate, the electrical lap joint performance is poorer, so that the defect that the performance of the traditional composite material shielding square cabin is generally not high is overcome. Meanwhile, the composite material of the existing shelter product cannot exert the advantages of the integrated manufacture of the composite material, so that the defects of long product manufacturing period and high cost are caused.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the manufacturing method of the carbon fiber composite shielding shelter which is light in weight, good in electromagnetic protection efficiency and simple in manufacturing process.
In order to solve the technical problems, the invention adopts the technical scheme that:
a carbon fiber composite material shielding shelter manufacturing method based on an autoclave process comprises the following steps:
s1, manufacturing a die: manufacturing door plate and cabin body moulds according to design specifications;
s2, door plate manufacturing: laying the outer skin in a cabin body mould; placing a middle layer in the outer skin, wherein the middle layer comprises shielding door profiles and a sandwich layer, and the sandwich layer is arranged between the shielding door profiles; laying an inner skin in the intermediate layer; sealing the inner skin by adopting a vacuum bag, vacuumizing, putting the mould into an autoclave, pressing and curing, demoulding, and machining to obtain a cabin door plate;
s3, manufacturing the cabin: laying the outer skin in a cabin body mould; a middle layer is arranged in the outer skin, and the middle layer comprises a door frame section bar, a reinforcing rib and a sandwich layer; laying an inner skin in the intermediate layer; sealing the inner skin by adopting a vacuum bag, vacuumizing, putting the mould into an autoclave, pressing and curing, demoulding, and machining to obtain a cabin body;
s4, conducting treatment: grinding the matching surface of the shielding door section and the door frame section until the conductive layer is formed, then coating conductive paint on the surface, and curing the coating;
s5, assembling the carbon fiber composite shielding shelter, installing an elastic conductive sealing strip at the groove position of the matching surface of the shielding door section bar and the door frame section bar, installing a hinge and a door lock at the corresponding position of the cabin body and the door plate, and ensuring the electromagnetic sealing of the cabin door position.
Further, in the step S2 and the step S3, the inner skin is formed by sequentially laying a carbon fiber layer, a shielding metal mesh layer, a metal-plated carbon fiber layer and a carbon fiber layer; the carbon fiber layer in the inner skin, the shielding metal net layer, the metal-plated carbon fiber layer and the carbon fiber layer are bonded through epoxy resin, unsaturated resin or polyurethane resin in a curing way; in the steps S2 and S3, the outer skin is formed by sequentially laying a carbon fiber layer, a shielding metal mesh layer, a metal-plated carbon fiber layer and a carbon fiber layer; the carbon fiber layer in the outer skin, the shielding metal net layer, the metal-plated carbon fiber layer and the carbon fiber layer are bonded through epoxy resin, unsaturated resin or polyurethane resin in a curing way; the shielding door section bar and the door frame section bar are made of carbon fiber composite materials, aluminum alloy or stainless steel.
Further, the carbon fiber layer is formed by pre-dipping or coating the carbon fiber cloth with resin; the shielding metal net layer adopts copper, nickel and permalloy; the metal-plated carbon fiber layer is made of copper-plated and silver-plated carbon fiber cloth.
Furthermore, the carbon fiber cloth adopts a warp-weft knitted fabric and a unidirectional knitted fabric
Further, the sandwich layer in steps S2 and S3 is sandwiched by foam or honeycomb.
Further, in the step S2, the vacuum degree is vacuumized to be less than-90 kPa, the pressure curing temperature is 80-150 ℃, and the pressure is 0.1-1 MPa.
Further, in the step S3, the vacuum degree is vacuumized to be less than-90 kPa, the pressure curing temperature is 80-150 ℃, and the pressure is 0.1-1 MPa.
Furthermore, the matching surface of the shielding door section and the door frame section is step-shaped, and a groove is formed in the layer surface of the step shape.
Further, the groove surface is subjected to conductive treatment. And (4) polishing or brushing the surface with conductive adhesive.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a manufacturing method of a carbon fiber composite shielding shelter based on an autoclave process, which combines a carbon fiber composite electromagnetic protection technology with a composite shelter integrated manufacturing process, greatly reduces the weight of the shelter compared with the traditional metal shielding machine shelter, adopts a mode of combining metal-plated carbon fibers with a shielding metal net in an electromagnetic reinforcing mode of the shelter composite material, ensures the realizability of a shielding structure while ensuring the density of components not to be obviously enhanced, and ensures the reliability of connection while ensuring excellent electromagnetic sealing performance by finally adopting an electric lap joint processing mode of a connecting part of a shelter body and a shelter door; the electromagnetic pulse protection capability of the carbon fiber composite material is improved by utilizing an electromagnetic strengthening treatment means between layers of the composite material, the electromagnetic strengthening composite material structure between the layers and the foam interlayer are used as the material of the equipment cabin wall, and a composite material manufacturing process is assisted, so that the integrated structure composite material equipment cabin with light weight and excellent electromagnetic protection effect is realized. The shelter is simple in manufacturing process and easy to realize in a processing mode, and the strength, the weight and the electromagnetic protection capability of the shelter are excellent by combining the advantages of the integrated structure of the shelter, so that the shielding efficiency of more than 40dB under the frequency of 14 kHz-18 GHz can be realized.
Drawings
FIG. 1 is a schematic structural view of a carbon fiber composite shielding shelter;
FIG. 2 is a schematic view of a structure of the shelter body and the door panel;
FIG. 3 is a schematic view of the structure of the cabin;
FIG. 4 is a schematic structural view of a carbon fiber composite skin;
fig. 5 is a schematic view of the manufacturing process of the cabin.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, a method for manufacturing a carbon fiber composite shielding shelter based on an autoclave process comprises the following steps:
s1, manufacturing a die: manufacturing door plate and cabin body moulds according to design specifications;
s2, door plate manufacturing: laying the outer skin 23 in the cabin mould; a middle layer is arranged in the outer skin 23, the middle layer comprises shielding door profiles and a sandwich layer 24, and the sandwich layer 24 is arranged between the shielding door profiles; laying an inner skin 22 within the intermediate layer; sealing the inner skin 22 by using a vacuum bag, vacuumizing, putting the mould into an autoclave, pressing, curing, demoulding and machining to obtain a cabin door plate 2;
s3, manufacturing the cabin: laying the outer skin 23 in the cabin mould; placing an intermediate layer in the outer skin 23, wherein the intermediate layer comprises a door frame profile 21, a reinforcing rib 25 and a sandwich layer 24; laying an inner skin 22 within the intermediate layer; sealing the inner skin 22 by using a vacuum bag, vacuumizing, putting the mould into an autoclave, pressing and curing, demoulding, and machining to obtain the cabin body 1;
s4, conducting treatment: grinding the matching surface of the shielding door section and the door frame section until the conductive layer is formed, then coating conductive paint on the surface, and curing the coating;
s5, assembling the carbon fiber composite shielding shelter, installing the elastic conductive sealing strip 3 at the groove position of the matching surface of the shielding door section bar and the door frame section bar, installing the hinge and the door lock at the corresponding positions of the cabin body 1 and the door plate 2, and ensuring the electromagnetic sealing of the cabin door position.
In the present embodiment, the inner skin is formed by sequentially laying the carbon fiber layer 26, the shielding metal mesh layer 27, the metal-plated carbon fiber layer 28 and the carbon fiber layer 26 in steps S2 and S3; the carbon fiber layer in the inner skin, the shielding metal net layer, the metal-plated carbon fiber layer and the carbon fiber layer are bonded through epoxy resin, unsaturated resin or polyurethane resin in a curing way; in the steps S2 and S3, the outer skin is formed by sequentially laying a carbon fiber layer 26, a shielding metal mesh layer 27, a metal-plated carbon fiber layer 28 and a carbon fiber layer 26; the carbon fiber layer in the outer skin, the shielding metal net layer, the metal-plated carbon fiber layer and the carbon fiber layer are bonded through epoxy resin, unsaturated resin or polyurethane resin in a curing way; the shielding door section bar and the door frame section bar are made of carbon fiber composite materials, aluminum alloy or stainless steel. The carbon fiber layer 26 is formed by pre-dipping or coating carbon fiber cloth with resin; the shielding metal mesh layer 27 adopts copper, nickel and permalloy; the metal-plated carbon fiber layer 28 is copper-plated or silver-plated carbon fiber cloth. The metal-plated carbon fiber is used for enhancing the shielding function of the carbon fiber composite material on low-frequency and high-frequency electromagnetic waves, the integral density of the material can not be greatly increased, the shielding metal mesh is used as a supplement material of the nickel-plated carbon fiber, the conductivity of the system is further improved, and the metal-plated carbon fiber can play a role in conductive connection at seams and other positions. The carbon fiber cloth adopts warp and weft woven fabrics and unidirectional woven fabrics. The sandwich layer 24 is sandwiched by foam or honeycomb in steps S2 and S3. The foam includes, but is not limited to, polyurethane foam, PET foam.
In this embodiment, in step S2, the vacuum degree is reduced to less than-90 kPa, the pressure curing temperature is 80 ℃ to 150 ℃, and the pressure is 0.1 MPa to 1 MPa. And step S3, vacuumizing until the vacuum degree is less than-90 kPa, the pressure curing temperature is 80-150 ℃, and the pressure is 0.1-1 MPa.
In this embodiment, the matching surface of the shielding door section and the door frame section is arranged in a step shape, and a groove is formed in the layer surface of the step shape. And conducting treatment is carried out on the groove surface. And (4) polishing or brushing the surface with conductive adhesive.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (9)
1. A carbon fiber composite material shielding shelter manufacturing method based on an autoclave process is characterized by comprising the following steps:
s1, manufacturing a die: manufacturing door plate and cabin body moulds according to design specifications;
s2, door plate manufacturing: laying the outer skin in a cabin body mould; placing a middle layer in the outer skin, wherein the middle layer comprises shielding door profiles and a sandwich layer, and the sandwich layer is arranged between the shielding door profiles; laying an inner skin in the intermediate layer; sealing the inner skin by adopting a vacuum bag, vacuumizing, putting the mould into an autoclave, pressing and curing, demoulding, and machining to obtain a cabin door plate;
s3, manufacturing the cabin: laying the outer skin in a cabin body mould; a middle layer is arranged in the outer skin, and the middle layer comprises a door frame section bar, a reinforcing rib and a sandwich layer; laying an inner skin in the intermediate layer; sealing the inner skin by adopting a vacuum bag, vacuumizing, putting the mould into an autoclave, pressing and curing, demoulding, and machining to obtain a cabin body;
s4, conducting treatment: coating conductive paint on the matching surfaces of the shielding door profile and the door frame profile;
s5, assembling the carbon fiber composite shielding shelter, installing an elastic conductive sealing strip in a groove position of the matching surface of the shielding door section bar and the door frame section bar, and installing a hinge and a door lock at the corresponding positions of the shelter body and the door plate.
2. The manufacturing method of the carbon fiber composite shielding shelter based on the autoclave process as claimed in claim 1, wherein: in the steps S2 and S3, the inner skin is formed by sequentially laying a carbon fiber layer, a shielding metal mesh layer, a metal-plated carbon fiber layer and a carbon fiber layer; the carbon fiber layer in the inner skin, the shielding metal net layer, the metal-plated carbon fiber layer and the carbon fiber layer are bonded through epoxy resin, unsaturated resin or polyurethane resin in a curing way; in the steps S2 and S3, the outer skin is formed by sequentially laying a carbon fiber layer, a shielding metal mesh layer, a metal-plated carbon fiber layer and a carbon fiber layer; the carbon fiber layer in the outer skin, the shielding metal net layer, the metal-plated carbon fiber layer and the carbon fiber layer are bonded through epoxy resin, unsaturated resin or polyurethane resin in a curing way; the shielding door section bar and the door frame section bar are made of carbon fiber composite materials, aluminum alloy or stainless steel.
3. The manufacturing method of the carbon fiber composite shielding shelter based on the autoclave process as claimed in claim 2, wherein: the carbon fiber layer is formed by pre-dipping or coating carbon fiber cloth with resin; the shielding metal net layer adopts copper, nickel and permalloy; the metal-plated carbon fiber layer is made of copper-plated and silver-plated carbon fiber cloth.
4. The manufacturing method of the carbon fiber composite shielding shelter based on the autoclave process as claimed in claim 3, wherein: the carbon fiber cloth adopts warp and weft woven fabrics and unidirectional woven fabrics.
5. The manufacturing method of the carbon fiber composite shielding shelter based on the autoclave process as claimed in claim 1, wherein: the sandwich layer in the steps S2 and S3 adopts foam or honeycomb sandwich.
6. The manufacturing method of the carbon fiber composite shielding shelter based on the autoclave process as claimed in claim 1, wherein: and step S2, vacuumizing until the vacuum degree is less than-90 kPa, the pressure curing temperature is 80-150 ℃, and the pressure is 0.1-1 MPa.
7. The manufacturing method of the carbon fiber composite shielding shelter based on the autoclave process as claimed in claim 1, wherein: and step S3, vacuumizing until the vacuum degree is less than-90 kPa, the pressure curing temperature is 80-150 ℃, and the pressure is 0.1-1 MPa.
8. The manufacturing method of the carbon fiber composite shielding shelter based on the autoclave process as claimed in claim 1, wherein: the matching surface of the shielding door section and the door frame section is step-shaped, and a groove is formed in the surface of the step-shaped layer.
9. The manufacturing method of the carbon fiber composite shielding shelter based on the autoclave process as claimed in claim 1 or 8, wherein: and conducting treatment is carried out on the groove surface.
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| CN202110159893.4A CN112959691A (en) | 2021-02-05 | 2021-02-05 | Manufacturing method of carbon fiber composite shielding shelter based on autoclave process |
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| CN202110159893.4A CN112959691A (en) | 2021-02-05 | 2021-02-05 | Manufacturing method of carbon fiber composite shielding shelter based on autoclave process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114834125A (en) * | 2022-05-30 | 2022-08-02 | 梁自禄 | Bamboo core composite material manufacturing method based on surface carbonization treatment |
| CN115665907A (en) * | 2022-11-11 | 2023-01-31 | 山东英特力光通信开发有限公司 | Square cabin vehicle with heating function and preparation method |
| CN117261368A (en) * | 2023-09-27 | 2023-12-22 | 咸宁海威复合材料制品有限公司 | Electromagnetic shielding composite material door plate structure and preparation method thereof |
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| CN111465304A (en) * | 2020-03-31 | 2020-07-28 | 中国电子科技集团公司第三十三研究所 | Carbon fiber composite material shielding case with integrated structure and preparation method thereof |
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| CN108859172A (en) * | 2018-03-19 | 2018-11-23 | 连云港神鹰复合材料科技有限公司 | A kind of preparation method of the integrally formed composite material shelter of precast framework formula |
| CN108471703A (en) * | 2018-05-30 | 2018-08-31 | 江苏恒神股份有限公司 | A kind of electromagnetic shielding composite material babinet and its manufacturing method |
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| CN114834125A (en) * | 2022-05-30 | 2022-08-02 | 梁自禄 | Bamboo core composite material manufacturing method based on surface carbonization treatment |
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Application publication date: 20210615 |