CN109687159A - Ultralight high-precision rapid shaping antenna reflective face and preparation method thereof - Google Patents
Ultralight high-precision rapid shaping antenna reflective face and preparation method thereof Download PDFInfo
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- CN109687159A CN109687159A CN201811614560.0A CN201811614560A CN109687159A CN 109687159 A CN109687159 A CN 109687159A CN 201811614560 A CN201811614560 A CN 201811614560A CN 109687159 A CN109687159 A CN 109687159A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/141—Apparatus or processes specially adapted for manufacturing reflecting surfaces
- H01Q15/142—Apparatus or processes specially adapted for manufacturing reflecting surfaces using insulating material for supporting the reflecting surface
- H01Q15/144—Apparatus or processes specially adapted for manufacturing reflecting surfaces using insulating material for supporting the reflecting surface with a honeycomb, cellular or foamed sandwich structure
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Abstract
The present invention provides a kind of ultralight high-precision rapid shaping antenna reflective faces and preparation method thereof, and the antenna reflective face includes surface metal-layer, glue-line, PMI foam, and the glue-line is connect with the working face of PMI foam reflecting surface.The present invention is by the PMI foam applications of quickly and easily Transmetallation and light high-stiffness in the preparation of antenna reflector, solve the problems, such as that traditional aluminum honeycomb interlayer composite material reflecting surface needs the autoclave forming process of use cost height, long flow path, compared to traditional honeycomb sandwich construction antenna reflector, not only it has been significantly shorter the process flow of preparation, more by 3 times of its weight saving, and it can guarantee that type face precision is suitable.
Description
Technical field
The present invention relates to PMI foam material structure functors and preparation method thereof, and in particular to a kind of ultralight high-precision is fast
Rapid-result type antenna reflective face and preparation method thereof.
Background technique
Antenna reflective face is the Typical Representative of structure-function integration, and it is logical that the surface precision of working face directly affects antenna
Interrogate the authenticity of signal.However, the increasing lightweight of antenna reflective face, high-precision, the demand of low cost, give antenna-reflected
Quickly manufacture brings huge challenge to face high-precision.In recent years, American-European countries starts to use foam material in antenna reflective face field
Material, in numerous foamed materials, Polymethacrylimide (PMI) foamed material is steady because of its chemistry outstanding and structure size
The excellent characteristics such as qualitative, good suitability for secondary processing, specific strength and specific modulus height are widely used.
Existing foam is applied in reflecting surface is used as sandwich material more, such as the utility model of Publication No. CN 206412482U
The patent of invention of patent and Publication No. CN103560332B, these reflector type face precision are all grade or submillimeter level,
It is unable to satisfy the communication for having reached Terahertz frequency range radio frequency and detection reflector requirement.And traditional Terahertz frequency range antenna
Reflecting surface uses the structure of composite material skin aluminum honeycomb interlayer, and product quality is heavier, and composite material skin is needed using heat
Tank technological forming is pressed, it is at high cost, process flow is long, in order to meet antenna reflective face lightweight high-precision quickly manufacture demand, adopt
The main structure for using PMI foam as antenna reflective face mitigates weight, is guaranteed using thermoforming process and Transmetallation anti-
The requirement for penetrating face surface conductivity, and meeting high-precision and quickly manufacturing.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of ultralight high-precision rapid shaping antenna-reflecteds
Face and preparation method thereof.Guarantee antenna reflective face rigidity, product surface precision to it is micron-sized under the premise of, alleviate product
Weight shortens process flow, reduces cost.
The purpose of the present invention is achieved through the following technical solutions:
The present invention provides a kind of ultralight high-precision rapid shaping antenna reflective face, and the antenna reflective face includes setting gradually
Metal layer, glue-line and PMI foam reflecting surface；The glue-line is connect with the working face of PMI foam reflecting surface.
Preferably, the PMI foam reflecting surface is made by PMI closed cell rigid foamed material.
Preferably, in the PMI foam reflecting surface, the aperture of PMI foam is that (aperture of PMI foam is tiny by 0.1-0.5mm
And uniformly), the density of PMI foam is 50~120kg/m3。
Preferably, 20~30 μm of diameter of metallic particles in the metal layer, metal layer with a thickness of 0.05~0.2mm.
Preferably, the glue-line is made by coating normal-temperature curing epoxy resinae adhesive, and the shearing of the glue-line is strong
Degree >=20MPa, peel strength >=15N/cm of the glue-line.
The present invention also provides a kind of preparation methods of ultralight high-precision rapid shaping antenna reflective face, include the following steps:
S1, PMI foam reflecting surface blank is prepared using thermoforming process；
S2, the PMI foam reflecting surface blank is processed, PMI foam reflecting surface is made；
S3, metal transfer film, the sprayed metal layer on the metal transfer film, in the gold are coated on high-precision mold
Belong to and coats glue-line on layer；
S4, the PMI foam reflecting surface prepared in step S2 is covered on the glue-line, through vacuum solidification and solidifying and setting
After demould to get the antenna reflective face.
Preferably, in step S1, the step of thermoforming process includes: that PMI foam is placed on high-precision mold is flat
Plate, and make vacuum bag；The high-precision mold for carrying out vacuum bag and PMI foam plate are subjected to hot briquetting.
Preferably, in step S1, the condition of the thermoforming process are as follows: be warming up to foam softening temperature (such as room temperature~
200 DEG C), it vacuumizes, vacuum pressure is 0.05~0.097MPa, 0.5~1.5h of heat-insulation pressure keeping, furnace cooling.Select this heat
The reflecting surface blank of the molding available higher initial precision of technique, reduces subsequent amount of machining, improves efficiency.
Preferably, in step S2, the step of processing includes: by the PMI foam reflecting surface blank from high-precision mould
After being demoulded on tool, it is fixed in frost sucker using the method for unstressed clamping, is processed using CNC milling machine；Process obtained institute
State PMI foam reflector type face precision RMS0.01~0.05mm.The unstressed installation way for selecting this frost sucker, avoids
Influence of the stress generated when tradition machinery clamping to reflector precision.
Preferably, in step S3, the metal transfer film is by 2-30 parts of polyvinyl alcohol, 40-70 parts of distilled water, 10-60 parts
Ethyl alcohol, 3-10 part glycerol, 3-10 parts of lauryl sodium sulfate mix.Glycerol and surfactant sodium dodecyl base sulfuric acid is added
The purpose of sodium is to reduce the surface tension of metal transfer film, improves transfer liquid in the wetability of die surface, improves transfer film thickness
Uniformity is spent, the coating of transfer membrane is improved, improves metal spraying efficiency.
It is highly preferred that the metal transfer film is by 5 parts of polyvinyl alcohol, and 55 parts of distilled water, 40 parts of ethyl alcohol, 5 parts of glycerol, 5 parts
Lauryl sodium sulfate composition.
Preferably, in step S3, the step of sprayed metal layer includes: to be sprayed on the surface of metal transfer film using flame
The mode sprayed metal layer of painting；The metal that the metal layer uses includes at least one of aluminium, nickel；The flame-spraying is formed
20~30 μm of metallic particles diameter, obtained 0.05~0.2mm of metal layer thickness.If the metallic particles of spraying is excessive, can lead
It causes the metal layer porosity formed to increase, reduces the electrical property of reflecting surface.
Preferably, in step S3, described the step of coating glue-line includes: to coat normal-temperature curing epoxy on the surface of metal layer
Resin adhesive, glue-spread 200g/m2~250g/m2。
Preferably, the normal-temperature curing epoxy Resin adhesive includes J133 normal-temperature curing epoxy Resin adhesive.
It preferably, include: that will process by the step that the PMI foam reflecting surface is covered on the glue-line in step S4
Obtained PMI reflecting surface is placed on high-precision mold, production bag vacuum pressurization sizing, make PMI antenna reflective face with
Mold is bonded completely.
Preferably, in step S4, the condition of the vacuum solidification: 20~30 DEG C of solidifications, curing time are 24~48h, at
Type pressure is 0.05~0.097MPa.The purpose of vacuum solidification is to keep it complete with mold to PMI reflecting surface certain pressure
Fitting.
Preferably, in step S4, the condition of the solidifying and setting are as follows: in 60 DEG C of solidifications, 3~4h or 80 DEG C of 1~2h of solidification.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, the present invention efficiently solves legacy cellular folder by high performance PMI foam applications in the preparation of antenna reflective face
The problems such as layer antenna reflector complex process, long flow path, and significantly reduce the weight of antenna reflective face.
2, present invention uses the reflecting surface blank that the technique of thermoforming has obtained degree of precision, production efficiency is improved；
Unstressed clamping is realized using the method for frost sucker clamping, avoids the stress of tradition machinery clamping generation to reflector precision
Influence；It joined glycerol and Surfactant SDS in metal transfer film, improve the coating of transfer membrane,
Improve metal spraying efficiency.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the ultralight high-precision rapid shaping antenna reflective face composition schematic diagram of the present invention；
Wherein: 1- high-precision reflecting surface shaping mould；2- surface metal-layer；3- glue-line；4-PMI foam reflecting surface.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
Embodiment 1
The present embodiment provides a kind of ultralight high-precision rapid shaping antenna reflective faces, as shown in Figure 1, including setting gradually
Metal layer 2, glue-line 3 and PMI foam reflecting surface 4；The glue-line 3 is connect with the working face of PMI foam reflecting surface 4.
The aperture of the PMI foam reflecting surface is tiny and uniform, and aperture is 0.3~0.5mm, and the density of PMI foam is
110kg/m3。
20~30 μm of the diameter of metallic particles in the metal layer, metal layer with a thickness of 0.05~0.2mm.
The adhesive that the glue-line uses is normal temperature cure J133 epoxy resin adhesive, the shear strength of the glue-line
>=25MPa, peel strength >=20N/cm are -60~100 DEG C using temperature.
The present embodiment also provides a kind of preparation method of ultralight high-precision rapid shaping antenna reflective face, and specific steps are such as
Under:
S1, PMI foam plate is placed on high-precision mold (RMS=8.8 μm), and make vacuum bag；
S2, the high-precision mold for carrying out vacuum bag and PMI foam plate are placed in baking oven, thermoforming process are as follows: room
Temperature~200 DEG C, vacuumizes, vacuum pressure 0.097MPa, heat-insulation pressure keeping 1h, furnace cooling；
S3, the good PMI foam antenna reflective face blank of thermoforming is demoulded, is inhaled using the method for unstressed clamping in frost
It is clamping in disk, PMI foam antenna reflective face is processed using high-precision milling machine, the type face precision of working face is 37.7 μm；
S4, preparing metal transfer membrane, by 5 parts of polyvinyl alcohol, 55 parts of distilled water, 40 parts of ethyl alcohol, 5 parts of glycerol, 5 parts of dodecanes
Base sodium sulphate is uniformly mixed, and is uniformly brushed metal transfer film on high-precision mold (RMS=8.8 μm) using wool brush,
It is whole to brush twice；
S5, method spray metal aluminium layer of the high-precision mold surface for brushing metal transfer film using flame-spraying is being applied,
Metallic particles diameter≤25 μm that flame-spraying is formed, obtained 0.05~0.2mm of metal layer thickness；
S6, one layer of J133 normal-temperature curing epoxy Resin adhesive is coated on the high-precision mold for sprayed metal layer, apply
Glue amount 200g/m2~250g/m2；
S7, the PMI foam reflecting surface integral cap for processing S3 make vacuum on coated J133 adhesive
Bag vacuumizes, and solidifies at 20~30 DEG C, and curing time is briquetting pressure 0.097MPa for 24 hours, solid after being then placed into baking oven
Change sizing, 60 DEG C of solidification 3h；
After S9, demoulding, finally RMS=38.4 μm of surface precision of antenna reflective face obtained, the weight of reflecting surface are
5.7kg, the production cycle 7 days.
Embodiment 2
The present embodiment provides a kind of ultralight high-precision rapid shaping antenna reflective face with and preparation method thereof, the antenna is anti-
It is same as Example 1 to penetrate face structure, it is specific the preparation method is as follows:
S1, PMI foam plate is placed on high-precision mold (RMS=8.8 μm), and make vacuum bag；
S2, the high-precision mold for carrying out vacuum bag and PMI foam plate are placed in baking oven, thermoforming system are as follows: room
Temperature~200 DEG C, vacuumizes, vacuum pressure 0.097MPa, heat-insulation pressure keeping 1h, furnace cooling；
S3, the good PMI foam antenna reflective face blank of thermoforming is demoulded, is inhaled using the method for unstressed clamping in frost
It is clamping in disk, PMI foam antenna reflective face is processed using high-precision milling machine, the type face precision of working face is 37.7 μm；
S4, preparing metal transfer membrane, by 5 parts of polyvinyl alcohol, 55 parts of distilled water, 40 parts of ethyl alcohol, 5 parts of glycerol, 5 parts of dodecanes
Base sodium sulphate is uniformly mixed, and is uniformly brushed transfer membrane on high-precision mold (RMS=8.8 μm) using wool brush, whole
It brushes twice.
S5, method spray metal aluminium layer of the high-precision mold surface for brushing metal transfer film using flame-spraying is being applied,
Metallic particles diameter≤25 μm that flame-spraying is formed, obtained 0.05~0.2mm of metal layer thickness；
S6, one layer of J133 normal-temperature curing epoxy Resin adhesive is coated on the high-precision mold for sprayed metal layer, apply
Glue amount 200g/m2~250g/m2；
S7, the PMI foam reflecting surface integral cap for processing S3 make vacuum on coated J133 adhesive
Bag vacuumizes, and solidifies at 20~30 DEG C, curing time 48h, briquetting pressure 0.05MPa, solid after being then placed into baking oven
Change sizing, 80 DEG C of solidification 1h；
S8, RMS=40.3 μm of surface precision for demoulding aft antenna reflecting surface, the weight of reflecting surface are 5.5kg, production cycle
8 days.
Embodiment 3
The present embodiment provides a kind of ultralight high-precision rapid shaping antenna reflective face with and preparation method thereof, the antenna is anti-
It is same as Example 1 to penetrate face structure, it is specific the preparation method is as follows:
S1, PMI foam plate is placed on high-precision mold (RMS=8.8 μm), and make vacuum bag；
S2, the high-precision mold for carrying out vacuum bag and PMI foam plate are placed in baking oven, thermoforming system are as follows: room
Temperature~200 DEG C, vacuumizes, vacuum pressure 0.05MPa, heat-insulation pressure keeping 1.5h, furnace cooling；
S3, the good PMI foam antenna reflective face blank of thermoforming is demoulded, is inhaled using the method for unstressed clamping in frost
It is clamping in disk, PMI foam antenna reflective face is processed using high-precision milling machine, the type face precision of working face is 37.7 μm；
S4, preparing metal transfer membrane, by 30 parts of polyvinyl alcohol, 70 parts of distilled water, 10 parts of ethyl alcohol, 3 parts of glycerol, 10 part 12
Sodium alkyl sulfate is uniformly mixed, and is uniformly brushed transfer membrane on high-precision mold (RMS=8.8 μm) using wool brush, whole
Twice of body brushing.
S5, method spray metal aluminium layer of the high-precision mold surface for brushing metal transfer film using flame-spraying is being applied,
20-25 μm of the metallic particles diameter that flame-spraying is formed, obtained 0.05~0.2mm of metal layer thickness；
S6, one layer of J133 normal-temperature curing epoxy Resin adhesive is coated on the high-precision mold for sprayed metal layer, apply
Glue amount 200g/m2~250g/m2；
S7, the PMI foam reflecting surface integral cap for processing S3 make vacuum on coated J133 adhesive
Bag vacuumizes, and solidifies at 20~30 DEG C, and curing time is briquetting pressure 0.097MPa for 24 hours, solid after being then placed into baking oven
Change sizing, 60 DEG C of solidification 3-4h；
S8, RMS=44.7 μm of surface precision for demoulding aft antenna reflecting surface, the weight of reflecting surface are 6.2kg, production cycle
7 days.
Embodiment 4
The present embodiment provides a kind of ultralight high-precision rapid shaping antenna reflective face with and preparation method thereof, the antenna is anti-
It is same as Example 1 to penetrate face structure；Specific preparation method is substantially the same manner as Example 1, the difference is that only: the present embodiment
In step S4, metal transfer film uses 2 parts of polyvinyl alcohol, 40 parts of distilled water, 60 parts of ethyl alcohol, 10 parts of glycerol and 3 parts of dodecyls
Sodium sulphate is prepared obtain after evenly mixing.
In the present embodiment, RMS=49.5 μm of surface precision of the antenna reflective face obtained after finally demoulding, the weight of reflecting surface
Measuring is 5.8kg, the production cycle 7 days.
Comparative example 1
This comparative example is related to a kind of preparation method of antenna reflective face, specific steps are as follows:
S1, using automatic fiber placement technology, M55J/ cyanogen is coated on high-precision antenna reflector shaping mould (RMS=8.8 μm)
Sour rouge hot melt prepreg, laying angle are [+45/0/-45/90]2s；
S2, inside and outside covering is utilized into autoclave process curing molding, curing cycle are as follows: room temperature~120 DEG C, pressurization
0.5MPa, 120 DEG C of heat-insulation pressure keeping 8h, pressure release furnace cooling；
S3, the inside panel of forming is placed on high-precision inside panel shaping mould, using aluminum honeycomb as sandwich, is carried out
Solidification by cement forms afterwards, briquetting pressure 0.2MPa.
S5, the high-precision inside panel molding mould surface coating aluminum layer in coating metal transfer film, J47C glue film is spread
It is overlying on metallic aluminum, by reflection cover on resin, and vacuumizes solidification, 130 DEG C of temperature, vacuum pressure 0.097MPa,
Time 3h.
S6, RMS=37.3 μm of surface precision for demoulding aft antenna reflecting surface, reflecting surface weight are 16.4kg, production cycle
20 days.
Comparative example 2
The preparation process of antenna reflective face in this comparative example are as follows:
S1, using automatic fiber placement technology, M55J/ cyanogen is coated on high-precision antenna reflector shaping mould (RMS=8.8 μm)
Sour rouge hot melt prepreg, laying angle are [+45/0/-45/90]2s；
S2, inside and outside covering is utilized into autoclave process curing molding, curing cycle are as follows: room temperature~120 DEG C, pressurization
0.5MPa, 120 DEG C of heat-insulation pressure keeping 8h, pressure release furnace cooling；
S3, the inside panel of forming is placed on high-precision inside panel shaping mould, using aluminum honeycomb as sandwich, is carried out
Solidification by cement forms afterwards, briquetting pressure 0.2MPa.
S5, the high-precision inside panel molding mould surface coating aluminum layer in coating metal transfer film, J47C glue film is spread
It is overlying on metallic aluminum, by reflection cover on resin, and vacuumizes solidification, 130 DEG C of temperature, vacuum pressure 0.05MPa, when
Between 4h.
S6, RMS=39.6 μm of surface precision for demoulding aft antenna reflecting surface, reflecting surface weight are 16.9kg, production cycle
20 days.
Comparative example 3
This comparative example provides a kind of preparation method of antenna reflective face, and the antenna reflective face structure is same as Example 1；
Specific preparation method is substantially the same manner as Example 1, and the difference is that only: in the step S4 of this comparative example, metal transfer film is adopted
It is prepared obtained after evenly mixing with 5 parts of polyvinyl alcohol, 55 parts of distilled water, 40 parts of ethyl alcohol, 10 parts of glycerol.
In this comparative example, RMS=58.2 μm of surface precision of the antenna reflective face obtained after finally demoulding, the weight of reflecting surface
Measuring is 5.9kg, the production cycle 7 days.
Effect compares:
The size of antenna reflective face RMS value and weight that above-described embodiment and comparative example obtain is as shown in table 1
Table 1
By above embodiments and comparative example it is found that based on PMI foam as main structure reflecting surface surface precision with
Aluminum honeycomb sandwich structure reflecting surface is suitable, and the weight of antenna reflective face reduces 3 times, and the production cycle is obviously shortened.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (10)
1. a kind of ultralight high-precision rapid shaping antenna reflective face, which is characterized in that the antenna reflective face includes setting gradually
Metal layer, glue-line and PMI foam reflecting surface；The glue-line is connect with the working face of PMI foam reflecting surface.
2. ultralight high-precision rapid shaping antenna reflective face as described in claim 1, which is characterized in that the PMI foam is anti-
It penetrates in face, the aperture of PMI foam is 0.1-0.5mm, and the density of PMI foam is 50~120kg/m3。
3. ultralight high-precision rapid shaping antenna reflective face as described in claim 1, which is characterized in that golden in the metal layer
20~30 μm of the diameter of metal particles, metal layer with a thickness of 0.05~0.2mm.
4. a kind of preparation method of ultralight high-precision rapid shaping antenna reflective face according to claim 1, feature exist
In including the following steps:
S1, PMI foam reflecting surface blank is prepared using thermoforming process；
S2, the PMI foam reflecting surface blank is processed, PMI foam reflecting surface is made；
S3, metal transfer film, the sprayed metal layer on the metal transfer film, in the metal layer are coated on high-precision mold
Upper coating glue-line；
S4, the PMI foam reflecting surface prepared in step S2 is covered on the glue-line, is taken off after vacuum solidification and solidifying and setting
Mould is to get the antenna reflective face.
5. the preparation method of ultralight high-precision rapid shaping antenna reflective face as claimed in claim 4, which is characterized in that step
In S1, the condition of the thermoforming process are as follows: it is warming up to the softening temperature of PMI foam, is vacuumized, vacuum pressure 0.05-
0.097MPa, heat-insulation pressure keeping 0.5-1.5h, furnace cooling.
6. the preparation method of ultralight high-precision rapid shaping antenna reflective face as claimed in claim 4, which is characterized in that step
In S2, the step of processing includes: after demoulding the PMI foam reflecting surface blank from high-precision mold, using without answering
The method of power clamping is fixed in frost sucker, is processed using CNC milling machine；Process the obtained PMI foam reflector type face
Precision RMS 0.01-0.05mm.
7. the preparation method of ultralight high-precision rapid shaping antenna reflective face as claimed in claim 4, which is characterized in that step
In S3, the metal transfer film is by 2-30 parts of polyvinyl alcohol, 40-70 parts of distilled water, 10-60 parts of ethyl alcohol, 3-10 parts of glycerol, 3-10
Part lauryl sodium sulfate mixes.
8. the preparation method of ultralight high-precision rapid shaping antenna reflective face as claimed in claim 4, which is characterized in that step
In S3, the step of sprayed metal layer includes: the mode using flame-spraying in the surface spray metal of metal transfer film；Institute
Stating metal includes at least one of aluminium, nickel；20~30 μm of metallic particles diameter of the flame-spraying formation, obtained metal
0.05~0.2mm of thickness degree.
9. the preparation method of ultralight high-precision rapid shaping antenna reflective face as claimed in claim 4, which is characterized in that step
In S3, described the step of coating glue-line includes: to coat normal-temperature curing epoxy Resin adhesive on the surface of metal layer, and glue-spread is
200g/m2~250g/m2。
10. the preparation method of ultralight high-precision rapid shaping antenna reflective face as claimed in claim 4, which is characterized in that step
In rapid S4, the condition of the vacuum solidification: 20~30 DEG C of solidifications, curing time are 24~48h, briquetting pressure is 0.05~
0.097MPa；The condition of the solidifying and setting are as follows: in 60 DEG C of solidifications, 3~4h or 80 DEG C of 1~2h of solidification.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474153A (en) * | 2019-07-31 | 2019-11-19 | 航天材料及工艺研究所 | A kind of flexible high-precision parabola antenna and preparation method thereof |
| CN111864403A (en) * | 2020-06-30 | 2020-10-30 | 上海复合材料科技有限公司 | High-precision reflecting surface forming method |
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