CN113927920A - Composite material antenna housing forming method - Google Patents
Composite material antenna housing forming method Download PDFInfo
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- CN113927920A CN113927920A CN202111069542.0A CN202111069542A CN113927920A CN 113927920 A CN113927920 A CN 113927920A CN 202111069542 A CN202111069542 A CN 202111069542A CN 113927920 A CN113927920 A CN 113927920A
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- China
- Prior art keywords
- composite material
- cloth
- resin
- curing
- prepreg
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Classifications
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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
- B29C70/30—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
- B29C70/345—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 matched moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/14—Making preforms characterised by structure or composition
- B29B11/16—Making preforms characterised by structure or composition comprising fillers or reinforcement
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention discloses a composite material antenna housing molding method, which is used for preparing resin pre-immersion liquid; uniformly soaking the resin pre-soaking solution into the quartz glass fiber cloth on a heating plate; after the airing is finished, putting the quartz glass fiber cloth soaked with the resin pre-soaking solution into a vacuum drying oven, and removing the solvent in the resin pre-soaking solution to obtain pre-soaking cloth; laying a plurality of groups of pre-dipping units in a mould, and pre-pressing in the laying process; laying a prepreg cloth in a mould, and then placing the mould in a press for hot-pressing and curing; and (5) curing and forming. The method overcomes the limitation that the RTM process can only prepare products with the thickness of less than 20mm, and realizes the preparation of the quartz fiber reinforced phthalonitrile composite material with the thickness of 30-50 mm, high temperature resistance, wave transmission and impact resistance. Through prepressing, the internal quality of the product is obviously improved, and no defects such as layering and cracks exist through DR detection.
Description
Technical Field
The invention belongs to the technical field of composite material antenna housing forming, and particularly relates to a composite material antenna housing forming method.
Background
With the rapid development of the aerospace industry, higher expectations are placed on high-performance resin-based composite materials, and the high-temperature resistance of the high-performance resin-based composite materials is mainly determined by matrix resin materials. Wherein, the epoxy resin can keep good mechanical property within the temperature range of-50 to 150 ℃, but the application temperature of the epoxy resin cannot be more than 180 ℃; the polyimide resin can be continuously used at the temperature of 300-400 ℃, but the thermal stability of the polyimide composite material is still to be researched and improved in the application range of higher temperature. The phthalonitrile resin is a novel high-temperature resistant resin, and researches show that the phthalonitrile resin has the heat-resistant temperature of 350 ℃ and has no glass transition phenomenon at 450 ℃. The weight loss rate is less than 10 percent within the temperature range of 600 ℃, and the material has the potential of high-temperature resistant resin-based materials. In addition, the phthalonitrile resin has excellent performances of low water vapor absorption rate, low dielectric loss and the like, and the structural composite material prepared by combining the phthalonitrile resin with the high-performance reinforced fiber has good application prospects in various fields such as aerospace and the like.
At present, quartz fiber reinforced phthalonitrile composite materials are mainly prepared and formed through an RTM process, but the RTM forming process can only solve the problem that thin-wall products with the thickness within the range of 20mm, and for products with the thickness within the range of 30-50 mm, the RTM preparation method has the problem that the quartz fibers cannot be soaked in o-benzene resin.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for forming a composite material radome with large thickness, high temperature resistance and impact resistance.
In order to achieve the purpose, the method for molding the composite material radome comprises the following steps:
1) preparation of prepreg
Adding a curing agent into phthalonitrile resin, blending, adding a sizing agent, and preparing a resin pre-impregnation solution at normal temperature; then cutting the quartz glass fiber cloth according to the size of the cavity in the die, and uniformly soaking the resin pre-soaking solution into the quartz glass fiber cloth on a heating plate; after the airing is finished, putting the quartz glass fiber cloth soaked with the resin pre-soaking solution into a vacuum drying oven, and removing the solvent in the resin pre-soaking solution to obtain pre-soaking cloth;
2) laying and mould pressing of prepreg cloth
Laying a plurality of groups of pre-dipping units in a mould, and pre-pressing in the laying process; laying a prepreg cloth in a mould, and then placing the mould in a press for hot-pressing and curing;
3) and (5) curing and forming.
Further, in the step 1), the curing agent accounts for 2-12% of the total mass of the phthalonitrile resin in percentage by mass, and the wetting agent accounts for 2-4% of the total mass of the phthalonitrile resin in percentage by mass.
Further, in the step 1), the mass concentration of the resin pre-immersion liquid solution is 40-55%.
Further, in the step 1), the temperature of the heating plate is raised to 50-80 ℃, the temperature of the vacuum drying oven is 100-140 ℃, and the pressure is-0.2-0.1 MPa.
Further, in the step 1), the phthalonitrile resin structure is phthalonitrile resin with a main chain containing a cyanate ester crosslinking structure; the curing agent is aromatic diamine or ZnCl2Or CuCl or a combination thereof; the impregnating compound is a dimethyl formamide compound.
Further, in the step 2), prepressing for 2-3 times, and heating to 160-240 ℃ in the prepressing process.
Further, in the step 2), the volume content of the fiber cloth in the groups of prepreg cloth units accounts for 40-65% of the total volume of the prepreg cloth units.
Further, in the step 2), each group of prepreg units comprises a layer of primary prepreg cloth and two layers of circumferential prepreg cloth according to the fiber direction of the prepreg cloth.
Further, in the step 3), the curing and temperature raising procedure is as follows, 150-170 ℃/1-2 h → 190-210 ℃/1-2 h → 230-250 ℃/3-5 h → 300-320 ℃/3-5 h → 350-375 ℃/3-5 h, after the blank is cured, the blank is slowly cooled to room temperature along with a furnace and is demoulded to obtain a net-size product blank; and in the curing process, the presoaked cloth pressure is always kept until the curing and the furnace cooling are finished.
The preparation of the quartz fiber reinforced phthalonitrile composite material is completed through the preparation of prepreg cloth, the laying of the prepreg cloth, the die pressing and the curing process, and the technical breakthrough of the resin matrix composite material with large thickness and high temperature resistance is realized; the composite material prepared by the forming method can be widely applied to certain high-temperature-resistant, wave-transparent and impact-resistant electromagnetic ejection products.
Compared with the prior art, the invention has the following advantages:
firstly, the forming method overcomes the limitation that the RTM process can only prepare products with the thickness of less than 20mm, and realizes the preparation of the quartz fiber reinforced phthalonitrile composite material with the large thickness of 30-50 mm, high temperature resistance, wave transmission and impact resistance.
And secondly, a prepressing method is added, the internal quality of the product is obviously improved, and the product has no defects such as layering, cracks and the like through DR detection.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Examples
1) Preparation of prepreg
Adding a curing agent into phthalonitrile resin, blending, adding a sizing agent, and preparing a resin pre-impregnation solution at normal temperature; wherein the curing agent accounts for 10 percent of the total mass of the phthalonitrile resin by mass percent, and the impregnating compound accounts for 3 percent of the total mass of the phthalonitrile resin by mass percent; then cutting the quartz glass fiber cloth according to the size of the inner cavity of the die, uniformly soaking the resin pre-soaking solution with the mass concentration of 45% into the quartz glass fiber cloth on a heating plate, and airing for 10-18 h; after the airing is finished, putting the quartz glass fiber cloth soaked with the resin pre-soaking solution into a vacuum drying oven, and removing the solvent in the resin pre-soaking solution to obtain pre-soaking cloth;
the temperature of the heating plate is raised to 60 ℃, the temperature of the vacuum drying oven is 120 ℃, and the pressure is-0.1 MPa;
the phthalonitrile resin structure is phthalonitrile resin with a main chain containing a cyanate ester crosslinking structure; the curing agent is aromatic diamine or ZnCl2Or CuCl or a combination thereof; the impregnating compound is a dimethyl formamide compound;
2) laying and mould pressing of prepreg cloth
Paving a plurality of groups of prepreg cloth units in a mould, and prepressing for 2 times in the paving process, wherein the volume content of fiber cloth in the plurality of groups of prepreg cloth units accounts for 55% of the total volume of the prepreg cloth units; each group of prepreg cloth units comprises a layer of mother prepreg cloth and two layers of circumferential prepreg cloth according to the fiber direction of the prepreg cloth; after laying prepreg cloth in a mould, placing the prepreg cloth in a press for hot-pressing solidification, and heating to 180 ℃ in the process of prepressing;
prepressing twice, prepressing after laying the prepreg unit with the thickness of 1/2, and inserting pins for yarn guiding in the thickness direction after all prepressing;
3) curing and shaping
The curing and temperature raising procedures are as follows, 170 ℃/2h → 210 ℃/2h → 250 ℃/5h → 320 ℃/5h → 375 ℃/5h, after the blank is cured, the blank is slowly cooled to room temperature along with the furnace and is demoulded to obtain a net-size product blank; and in the curing process, the presoaked cloth pressure is always kept until the curing and the furnace cooling are finished.
The prepared composite material has excellent mechanical, thermal and electrical performance material performance indexes which are equivalent to those of a material formed by an RTM process, and the material indexes are shown in an attached table.
Claims (9)
1. A composite material antenna housing forming method is characterized in that: the method comprises the following steps:
1) preparation of prepreg
Adding a curing agent into phthalonitrile resin, blending, adding a sizing agent, and preparing a resin pre-impregnation solution at normal temperature; then cutting the quartz glass fiber cloth according to the size of the cavity in the die, and uniformly soaking the resin pre-soaking solution into the quartz glass fiber cloth on a heating plate; after the airing is finished, putting the quartz glass fiber cloth soaked with the resin pre-soaking solution into a vacuum drying oven, and removing the solvent in the resin pre-soaking solution to obtain pre-soaking cloth;
2) laying and mould pressing of prepreg cloth
Laying a plurality of groups of pre-dipping units in a mould, and pre-pressing in the laying process; laying a prepreg cloth in a mould, and then placing the mould in a press for hot-pressing and curing;
3) and (5) curing and forming.
2. The method for molding the composite material radome according to claim 1, wherein: in the step 1), the curing agent accounts for 2-12% of the total mass of the phthalonitrile resin in percentage by mass, and the impregnating compound accounts for 2-4% of the total mass of the phthalonitrile resin in percentage by mass.
3. The method for molding the composite material radome according to claim 1, wherein: in the step 1), the mass concentration of the resin pre-immersion liquid solution is 40-55%.
4. The method for molding the composite material radome according to claim 1, wherein: in the step 1), the temperature of the heating plate is raised to 50-80 ℃, the temperature of the vacuum drying oven is 100-140 ℃, and the pressure is-0.2-0.1 MPa.
5. The method for molding the composite material radome according to claim 1, wherein: in the step 1), the phthalonitrile resin structure is phthalonitrile resin with a main chain containing cyanate ester crosslinking structure; the curing agent is aromatic diamine or ZnCl2Or CuCl or a combination thereof; the impregnating compound is a dimethyl formamide compound.
6. The method for molding the composite material radome according to claim 1, wherein: and in the step 2), prepressing for 2-3 times, and heating to 160-240 ℃ in the prepressing process.
7. The method for molding the composite material radome according to claim 1, wherein: in the step 2), the volume content of the fiber cloth in the groups of prepreg cloth units accounts for 40-65% of the total volume of the prepreg cloth units.
8. The method for molding the composite material radome according to claim 1, wherein: in the step 2), each group of prepreg units comprises a layer of primary prepreg cloth and two layers of circumferential prepreg cloth according to the fiber direction of the prepreg cloth.
9. The method for molding the composite material radome according to claim 1, wherein: in the step 3), the curing and temperature raising procedures are as follows, 150-170 ℃/1-2 h → 190-210 ℃/1-2 h → 230-250 ℃/3-5 h → 300-320 ℃/3-5 h → 350-375 ℃/3-5 h, after the blank is cured, the blank is slowly cooled to room temperature along with a furnace and is demoulded, and a net-size product blank is obtained; and in the curing process, the presoaked cloth pressure is always kept until the curing and the furnace cooling are finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069542.0A CN113927920A (en) | 2021-09-13 | 2021-09-13 | Composite material antenna housing forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069542.0A CN113927920A (en) | 2021-09-13 | 2021-09-13 | Composite material antenna housing forming method |
Publications (1)
| Publication Number | Publication Date |
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| CN113927920A true CN113927920A (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111069542.0A Pending CN113927920A (en) | 2021-09-13 | 2021-09-13 | Composite material antenna housing forming method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002008446A (en) * | 2000-06-22 | 2002-01-11 | Sumitomo Bakelite Co Ltd | Resin composite for insulating material and insulating material using it |
| US20080025906A1 (en) * | 2004-12-27 | 2008-01-31 | Jiin-Huey Chern Lin | Method for Preparing a Carbon/Carbon Composite |
| CN106928488A (en) * | 2017-04-11 | 2017-07-07 | 大连理工大学 | Fabric enhancing blending resin base composite laminate of phthalonitrile containing Phthalazinone and preparation method thereof |
| CN107903189A (en) * | 2017-10-24 | 2018-04-13 | 中国科学院化学研究所 | It is a kind of phthalonitrile-terminated containing fluorene structured poly (arylene ether nitrile) oligomer, solidfied material and preparation method thereof |
| CN108454135A (en) * | 2018-01-31 | 2018-08-28 | 航天材料及工艺研究所 | A kind of o-phthalonitrile resin prepreg, composite material and preparation method |
-
2021
- 2021-09-13 CN CN202111069542.0A patent/CN113927920A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002008446A (en) * | 2000-06-22 | 2002-01-11 | Sumitomo Bakelite Co Ltd | Resin composite for insulating material and insulating material using it |
| US20080025906A1 (en) * | 2004-12-27 | 2008-01-31 | Jiin-Huey Chern Lin | Method for Preparing a Carbon/Carbon Composite |
| CN106928488A (en) * | 2017-04-11 | 2017-07-07 | 大连理工大学 | Fabric enhancing blending resin base composite laminate of phthalonitrile containing Phthalazinone and preparation method thereof |
| CN107903189A (en) * | 2017-10-24 | 2018-04-13 | 中国科学院化学研究所 | It is a kind of phthalonitrile-terminated containing fluorene structured poly (arylene ether nitrile) oligomer, solidfied material and preparation method thereof |
| CN108454135A (en) * | 2018-01-31 | 2018-08-28 | 航天材料及工艺研究所 | A kind of o-phthalonitrile resin prepreg, composite material and preparation method |
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