CN109367055B - A kind of recombination energy field is heating and curing the method for composite material - Google Patents
A kind of recombination energy field is heating and curing the method for composite material Download PDFInfo
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- CN109367055B CN109367055B CN201811497425.2A CN201811497425A CN109367055B CN 109367055 B CN109367055 B CN 109367055B CN 201811497425 A CN201811497425 A CN 201811497425A CN 109367055 B CN109367055 B CN 109367055B
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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
- B29C70/342—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
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
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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
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0855—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using microwave
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Toxicology (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention provides a kind of method that recombination energy field is heating and curing composite material, including using a kind of composite material solidification equipment, described device includes electrothermal piece, shake table, microwave generator, microwave cavity, microwave shadow shield part and vacuumizing part, and the shake table for placing composite material is arranged in microwave cavity；Microwave generator and electrothermal piece are used to as composite material heat supply, and microwave shadow shield part is located in microwave cavity；Shake table for the vibration of 5000Hz or less vibration frequency can be provided to the composite material and can provide 2g or more vibration acceleration vibration shake table；Microwave generator and microwave shadow shield part make device that heating is pinpointed or oriented to composite material, and electrothermal piece makes device carry out whole heating to composite material, and shake table provides the vibration acceleration of the vertical direction of 2g or more for solidifying for composite material.The method of the invention can composite material solidify under atmospheric pressure to obtain the product of function admirable.
Description
Technical field
The invention belongs to composite material curing molding fields, and in particular to a kind of recombination energy field is heating and curing composite material
Method.
Background technique
Aerospace is formed with high performance resin based composites and mainly uses autoclave process at present, because when its solidification
Relatively high temperature and solidifying pressure are typically necessary to eliminate bubble caused by resin matrix in solidification process, such as T800
Carbon-fibre reinforced epoxy resin prepreg solidifies under conditions of 180 DEG C and 0.6MPa, to avoid dredging inside the product after solidification
Loose porous and poor mechanical property.
In conventional thermocompression tank curing process, due to the geometric dimension of composite product, material system and curing process
The difference of parameter can be different degrees of the uneven distribution for causing product internal temperature and curing degree, cause product to generate complicated
Internal stress, the shape Collaborative Manufacturing of composite product is seriously affected, especially for solidifying thick section parts, inside product
The defects of there are biggish temperature gradients, therefore the complicated internal stress generated can make product generate layering and MATRIX CRACKING, very
To being damaged product just during molding.
It, will be micro- because microwave has many advantages, such as that selectivity heating, heating speed is fast, homogeneous heating, penetrability is strong, thermal inertia is small
Wave technology is applied to composite material and solidifies field, can substantially reduce curing time, reduces production cost, obtains excellent product
Can, there is huge development potentiality.The patent right CN201610025303 that is formerly obtained such as present inventor,
CN201610027791, CN201610027866, CN201610030557 and CN201710214268 etc. are using microwave
Hot-press solidifying is carried out to composite material in conjunction with the technique of autoclave.So that the composite product of hot-press solidifying is in solidification process
In can obtain precisely required temperature field.
But the use of autoclave is all also be unable to do without in above-mentioned composite material solidification process.And autoclave forming process exists
Autoclave equipment itself is expensive, and production efficiency is low, energy consumption is high, device fabrication and operating cost are high, to molding die requirement
High some disadvantages.In addition, the operation with high pressure combination microwave in autoclave is in use, there is also some potential safety problemss.This is
The widely applied bottleneck of composite material is restricted through becoming, inexpensive non-autoclave forming technique is absurd fantastic in this background
It is raw.
Non-autoclave forming technique is a kind of inexpensive manufacture technology of composite material, main with autoclave forming process
Difference does not need to apply external pressure when being molding, abandons the autoclave to involve great expense, only with baking oven and pumped vacuum systems, therefore
The cured low production cost of composite material.This is better than autoclave forming process in terms of equipment molding and die cost.But
It is to obtain and solidify product with the composite material of autoclave forming process phase homogenous quantities, be the main mesh of non-autoclave molding technology
Mark.
However, the molding composite product porosity of non-autoclave is higher since briquetting pressure is low.General autoclave at
The porosity of type aerospace main force support structure part should be lower than 1%, and the porosity of secondary load-carrying construction part should be lower than 2%, and traditional
Material prepreg solidify according to non-autoclave forming technique, product porosity can be up to 5%~10%.Hole
An important factor for being influence composite property, therefore reduce the porosity for solidifying obtained composite product and reach
The porosity level of the composite product of solidification of hot-press tank, it has also become the top priority of non-autoclave forming technique research.
That is, with the continuous development of resin material curing process, the little non-bearing component of some stress, people
It has begun with curing process outside autoclave and makes.But for aerospace such as T800 carbon-fibre reinforced epoxy resin
The composite materials such as prepreg, only the solidifying pressure by vacuumizing is far from enough, because solidifying pressure is inadequate, after solidification inside product
The defects of gap will be generated, and then substantially reduce the mechanical property of product.So for the advanced resin base of aerospace
Carbon fibre reinforced composite can't reach requirement using curing technology outside current existing autoclave.
Therefore, for save the cost and raising safety coefficient, high-pressure curing is being carried out to composite material without using autoclave
When, if the porosity of the high-performance composite materials of aerospace can be made also to be able to achieve the similar hot-press solidifying in autoclave
Effect, this is those skilled in the art's problem to be solved.Therefore, those skilled in the art need to develop and be used for accordingly
High performance resin base carbon fibre enhances the cured device and method of composite product.
Summary of the invention
Therefore, the present invention provides a kind of method that recombination energy field is heating and curing composite material, including uses a kind of composite wood
Expect solidification equipment, described device includes electrothermal piece, shake table, microwave generator, microwave cavity, microwave shadow shield part and vacuumizes
Component, the shake table are arranged in microwave cavity；For placing composite material on shake table, the microwave generator is to microwave cavity
Interior transmission microwave is used to be the composite material heat supply, and the electrothermal piece is also used for as the composite material heat supply, the microwave
Shadow shield part is located at the outer surface in microwave cavity and for being covered on composite material, and the microwave shadow shield part is micro- by shielding
Wave area and transmission microwave region form, described to make the microwave energy in microwave cavity from seam comprising one or more gap through microwave region
Enter in composite material at gap and is absorbed；The vacuumizing part includes vacuum bag and vacuum tube, and is used for composite wood
The gas generated in material solidification process is extracted out in time；The shake table vibrates for that can provide 5000Hz or less to the composite material
The vibration of frequency and can provide 2g or more vibration acceleration vibration shake table；The microwave generator and microwave locally shield
Shield makes device that heating is pinpointed or oriented to composite material, and it is whole that the electrothermal piece carries out device to composite material
Heating, the shake table provide the vibration acceleration of the vertical direction of 2g or more for solidifying for composite material.
In a kind of specific embodiment, electrothermal piece (222) setting is in microwave cavity (2).
In a kind of specific embodiment, described device further includes incubator (111), and microwave cavity (2) setting is being kept the temperature
In case, the electrothermal piece (222) setting microwave cavity (2) outside with incubator in, on the microwave cavity containing it is one or more by
The vent window or ventilation wall that metal honeycomb plate is constituted, for may make that sidewind is smooth inside and outside microwave cavity while shield microwaves
It is logical.
In a kind of specific embodiment, described device further includes microwave power control module (12) and control system
(11), the control system (11) being arranged in outside microwave cavity is automatically adjusted micro- by automatic control microwave power control module (12)
The opening and closing and/or watt level of wave producer (1)；It is preferred that the control system (11) is also electrically connected with the electrothermal piece (222)
Control the opening and closing and/or heating rate for automatically adjusting electrothermal piece.
In a kind of specific embodiment, the pressure in the composite material solidification process is 0.1~0.2MPa.
In a kind of specific embodiment, the shake table vibrates for that can provide 2000Hz or less to the composite material
The vibration of frequency and can provide 3g or more vibration acceleration vibration shake table.
In a kind of specific embodiment, the shake table vibrates frequency for that can provide 10Hz or more to the composite material
The vibration of rate and can provide 50g or less vibration acceleration vibration shake table, the preferably described shake table is can be to described multiple
Condensation material provides the vibration of 20Hz or more vibration frequency and can provide the shake table of the vibration of 30g or less vibration acceleration.
In a kind of specific embodiment, the shake table is can provide in 30~1000Hz extremely to the composite material
The vibration of small part vibration frequency and at least partly shake table of the vibration of vibration acceleration can be provided in 5~20g.
In a kind of specific embodiment, multiple vibration hammers, and each vibration hammer are connected with below the shake table (7)
It is connect with vibration hydraulic oil pipe or tracheae (71) to be provided commonly for the composite material for shake table and setting on a vibration table
The random continual vibration of acceleration vertical direction is provided, the preferably described vibration hammer is evenly distributed below shake table.
In a kind of specific embodiment, described device further includes temperature-measuring part, and the temperature-measuring part includes thermometric
The composite wood on the inside of microwave shadow shield part is arranged in head, data collecting instrument (42) and thermometric transmission line (43), the temperature measuring head
In material, thermometric transmission line one end is connect with temperature measuring head, and the other end leads on the outside of the microwave cavity and acquires with the data
Instrument connection, the data collecting instrument for showing the temperature that the temperature measuring head measures in time, and data collecting instrument is by the number of acquisition
According to being transmitted to control system (11), control system automatically adjusts microwave generator by automatically controlling microwave power control module
Opening and closing and/or watt level.
Preferably, the power adjustable section of the microwave generator, preferably its power linear are adjustable, and microwave generator is located at micro-
Wave top of chamber, the microwave generator include wave transparent heat-resistant board and leaky antenna.
Preferably, the outside of microwave shadow shield part is arranged in the vacuum bag, and in the vacuum bag and microwave part
Be additionally provided between shielding part airfelt for vacuumize when gas water conservancy diversion, the vacuumizing part further include quick union and
Sealant tape.
Using device and method provided by the invention, can at least bring it is following the utility model has the advantages that
1) present invention provides a kind of multi- scenarios methods such as the vibration acceleration field of electrical heat energy field, microwave energy field and vertical direction
Recombination energy field so that be heating and curing composite material when its internal temperature field and curing degree it is uniform.
2) whole heating is carried out to composite material as main heating source using electrothermal piece in device provided by the invention, and
Heating auxiliary is pinpointed or oriented using microwave, energy is provided, so that being heating and curing for composite material can be truly realized uniform throughout one
It causes.The inside and outside solidification that the internal temperature that the present invention is able to achieve composite product is uniformly distributed with product is synchronous, to subtract significantly
The probability of the various defects such as layering, deformation, cracking, residual stress occurs for the product after solidifying less, makes product because of internal temperature
Scrappage is greatly reduced caused by uneven, improves the quality of production and productivity effect of product.
3) present invention really realizes the uniform temperature fields of thick composite material and Varying-thickness large-scale composite material, inside and outside synchronization
Solidification helps to solve large-scale composite material primary load bearing product shape Collaborative Manufacturing problem.The present invention can be used for the quality of production and want
Harsh aerospace product is sought, the quality of production for improving aerospace product is had important practical significance.
4) in a kind of specific embodiment, present invention combination computer autocontrol technique, use is provided by the invention
Device can solidify the recombination energy field that composite material carries out automatically controlling.
Generally speaking, solidification equipment of the present invention and curing method can make material prepreg under atmospheric pressure
Solidify and obtains the product of function admirable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of device of the present invention.
Fig. 2 is the structural schematic diagram of device in another embodiment of the present invention.
Wherein, 1, microwave generator, 2, microwave cavity, 3, microwave shadow shield part, 41, temperature measuring head, 42, data collecting instrument,
43, thermometric transmission line, 5, vacuum bag, 6, airfelt, 7, shake table, 71, vibration hydraulic oil pipe or tracheae, 8, vacuum tube, 9,
Quick union, 10, sealant tape, 11, control system, 12, microwave power control module, 111, incubator, 222, electrothermal piece,
112, wave transparent heat-resistant board, 113, leaky antenna, 01, composite material.
Specific embodiment
The embodiment of the present invention is described in detail below, but the present invention can be limited and be covered according to claim
Multitude of different ways implement.
As known to those skilled in the art: shake table is also known as vibration exciter or vibration machine.It is a kind of using electric
Dynamic, electro-hydraulic pressure, piezoelectricity or other principles obtain the device of mechanical oscillation.Higher acceleration and higher is realized with lesser table top
Working frequency.Vibration test is broadly divided into sinusoidal vibration and random vibration.Shake table is suitable for auto parts and components, electronics member device
Coupled vibration is carried out to sample on the industries such as part, component, medicine, food, furniture, gift, ceramics, packaging laboratory and production line
Test.It is tested as environment receives, quality identification test, reliability compliance test, endurance test, vibration simulation analysis, material is special
Property test, fatigue test, vibration prevent improve etc..The vibration that analog equipment is subjected in manufacture, assembling, transport and use process
Rotating ring border, to evaluate resistance to vibration, reliability and the integrity of its structure.
That is, the purposes of shake table is limited to the service life of artificial post test product more at present.
And the random vibration of the vertical direction generated in the present invention using shake table, it is compound to be used for resin-based carbon fiber
In the solidification process of material, so that material prepreg is solidified into qualified composite product.Solidification in the present invention is former
Reason has references to concrete vibrating principle.Specifically, mixed and stirred with concrete agitator concreting component when, must exclude its
Phenomena such as middle bubble, is made firm by ramming, and concrete compaction is combined, and eliminates the voids and pits of concrete is guaranteed with improving its intensity
The quality of concrete component.The above-mentioned process eliminating bubble to concrete, being made firm by ramming is concrete vibrating.The vibration of low frequency formula
Dynamic frequency is 25~50HZ；Intermediate frequency formula is 83~133HZ；High frequency type is 167HZ or more.
For the present invention unlike concrete vibrating, vibration frequency of the invention first is not limited to the frequency of concrete vibrating
Rate, secondly, concrete vibrating belongs to cold curing, and the invention belongs to curing processes；In addition, being to utilize 2g or more in the present invention
The vibration vertically downward of vibration acceleration, and vibration acceleration direction is usually unordered in concrete vibrating.
Referring to the concrete secondary vibration that 1~4h or so is carried out before initial set, the present invention is subsequent can also accordingly to test two
Effect of the secondary vibration to composite material heat cure.
Present mature technology, such as " accelerating lifetime testing of commercially available acquisition can be used in shake table in the present invention
Instrument ", the shake table itself are exclusively used in the test that accelerates the failure of life of product, and are used to replace by such shake table in the present invention
High pressure in autoclave and make the solidification effect of carbon fiber resin composite material more excellent.
In addition, the direction of gravity acceleration g is always straight down, heretofore described shake table can provide 2g's or more
Vibration acceleration, i.e., the vibration acceleration that shake table provides in solidification process are 2g or more, g=9.8m/s2, when preferred consolidation shakes
Dynamic acceleration is 2~50g, more preferable 5~30g.Namely the vibration acceleration direction that shake table provides in the present invention is equally perpendicular
Histogram to.
Embodiment 1
Solidify T800 composite material using device of the present invention,
First electric heating and shake table do vibration processing to composite material, and temperature is warming up to 80 DEG C by room temperature with 1.5 DEG C/min,
30min is kept the temperature later, and vibration frequency is the random vibration of 10-2000Hz, vibration acceleration 10g, g=9.8m/s2, at vibration
To composite material vacuumize process during reason, composite material local environment pressure is atmospheric pressure.
After the vibration processing that the composite material keeps the temperature 30min at 80 DEG C, stops vibration, be directly warming up to 180 DEG C by 80 DEG C
Heat cure is carried out, electric heating and the compound thermal field of microwave heating do elevated cure processing, the compound thermal of composite material to composite material
Field heating rate is 3~5 DEG C/min, this stage continues vacuumize process to composite material, and composite material local environment pressure is still
For atmospheric pressure.150min is kept the temperature after being warming up to 180 DEG C, obtains composite product after furnace cooling.Therefore, in vacuumized conditions
Under and ambient air pressure, the pressure that composite material is subject to be 0.1-0.2Mpa.
The porosity of gained composite product is 0.32~0.43%, the interlaminar shear strength of gained composite product
For 94.65~98.96Mpa.
In apparatus of the present invention, such as the vibration environment of the shake table are as follows: Triaxiality and six degrees of freedom super-Gaussian random vibration,
Peak acceleration is 75g, and vibration frequency is 10~5000Hz, and the temperature range of work is -100 DEG C~+200 DEG C.Vibration
Using external air compressor as power source, sustainable utilization pneumatic hammer provides stable vibration source for shake table, vibrates in vibration processes platform
It is transferred to composite material in the vertical direction from shake table.
Embodiment 2
Solidify T800 composite material using device of the present invention,
First electric heating and shake table do vibration processing to composite material, and temperature is warming up to 135 by room temperature with 1.5 DEG C/min
DEG C, keep the temperature 30min later, vibration frequency is the random vibration of 10-2000Hz, vibration acceleration 15g, during vibration processing
To composite material vacuumize process, composite material local environment pressure is atmospheric pressure.
After the vibration processing that the composite material keeps the temperature 20min at 135 DEG C, stops vibration, be directly warming up to 180 by 135 DEG C
DEG C carry out heat cure, electric heating and the compound thermal field of microwave heating do elevated cure processing to composite material, composite material it is compound
Thermal field heating rate is 3~5 DEG C/min, this stage continues vacuumize process, composite material local environment pressure to composite material
It is still atmospheric pressure.150min is kept the temperature after being warming up to 180 DEG C, obtains composite product after furnace cooling.
The porosity of gained composite product is 0.23~0.28%, the interlaminar shear strength of gained composite product
For 105.32~107.95Mpa.
Embodiment 3
Solidify T800 composite material using device of the present invention,
First electric heating and the compound thermal field of microwave heating do elevated cure processing to composite material, and shake table is simultaneously to composite wood
Material does vibration processing, and temperature is warming up to 180 DEG C by room temperature with 3~5 DEG C/min, keeps the temperature 10min, vibration frequency 10- later
The random vibration of 2000Hz, vibration acceleration 10g, vibration processing is in the process to composite material vacuumize process, composite material
Local environment pressure is atmospheric pressure.
After the vibration processing that the composite material keeps the temperature 10min at 180 DEG C, stops vibration, continues 180 DEG C of heat preservation 150min,
Electric heating and the compound thermal field of microwave heating solidify complex material heat preservation, this stage continues vacuumize process to composite material, multiple
Condensation material local environment pressure is still atmospheric pressure.After heat preservation, composite product is obtained after furnace cooling.
The porosity of gained composite product is 0.16~0.22%, the interlaminar shear strength of gained composite product
For 109.74~116.33Mpa.
Comparative example 1
This comparative example is that autoclave is used alone to carry out high temperature and pressure integrally curing to T800 composite material, and solidifying pressure is
0.6MPa, electric heating makes composite temperature be warming up to 180 DEG C by room temperature with 1.5 DEG C/min in autoclave, and is warming up to 180
150min is kept the temperature after DEG C, and composite product is obtained after furnace cooling, composite material is vacuumized in entire solidification process
Processing.
The porosity of gained composite product is 0.36%, and the interlaminar shear strength of gained composite product is
98.15Mpa。
Comparative example 2
This comparative example is that microwave is used alone to carry out high temperature integrally curing to T800 composite material, and solidifying pressure is environment pressure
Power, i.e. atmospheric pressure, microwave heating makes composite temperature be warming up to 180 DEG C by room temperature with 3~5 DEG C/min, and is warming up to 180
150min is kept the temperature after DEG C, and composite product is obtained after furnace cooling, composite material is vacuumized in entire solidification process
Processing.
The porosity of gained composite product is 1.45~1.56%, the interlaminar shear strength of gained composite product
For 74.63~76.97Mpa.
By the comparison result of the embodiment of the present invention 1~3 and comparative example 1 and 2 it is found that being obtained after device of the present invention solidification
To the performance of composite product can compare favourably completely with this standard cure process of solidification of hot-press tank.Even in the present invention
After optimizing vibration time, vibration outlet temperature, vibration frequency and vibration acceleration, in device and method provided by the invention
Composite material solidification effect can also be significantly better than solidification of hot-press tank.This make the present invention solution " it is desirable that do not use it is expensive and
While not safe enough autoclave equipment progress composite material solidification " problem, it is solid that unexpected composite material is also obtained
Change effect, the product properties of product after solidification are even better than this standardization program of solidification of hot-press tank.
In conclusion the present invention at least has the following characteristics that
1, the composite product haveing excellent performance is prepared in the case where vacuumizing and not impressed pressure by the present invention, drops
Low composite material curing molding pressure, and curing rate has obtained a degree of quickening, has saved equipment cost and solidification
Cost realizes composite product safety, uniform, efficient, energy conservation ground forming and hardening.
2, after the present invention can also be by optimization vibration time, vibration outlet temperature, vibration frequency and vibration acceleration, make
The performance for obtaining composite product is better than composite product made from this standardization program of solidification of hot-press tank.Reason is analyzed,
May be composite material for example 0.6MPa condition of high voltage solidification when, although pressure can be with the preimpregnation of Effective Compaction composite material
Laying is expected, to improve the quality of product, but pressure is gradually transmitted inwards from the surface of composite material, is pressurized not in table
Together, thus solidify gained product porosity it is relatively high and distribution of pores is uneven.And vibration downward in the present invention accelerates
Under degree, for composite material everywhere by uniform vibration acceleration, it equally can be with the prepreg of Effective Compaction composite material
Laying, to improve the quality of product, and solidify gained product porosity can lower and distribution of pores it is more uniform.
3, by composite heater and vibration device integrated setting in the present invention so that composite product in vibration and
It can continue to heat up or keep the temperature without cooling after heat treatment to carry out heat cure, solidify the product of resulting composite product
It can be more preferable.
4, in a kind of specific embodiment, the present invention in, will not be needed in composite product especially heat or
Cured region is covered with micro-wave screening material, does not cover micro-wave screening then to needs especially heating or cured region
Material stays one or more gap, so that the microwave shadow shield part is formed by shield microwaves area and through microwave region.Microwave
Generator generates microwave and enters and be dispersed in microwave cavity, and the region of micro-wave screening material is not pasted to composite product
(penetrating microwave region) is internally heated or solidifies.The region that micro-wave screening material has been pasted on composite product (shields micro-
Wave area) since microwave not can enter wherein, so these regions are absorbed less than microwave energy, and can only receive from electrothermal piece
222 whole heating.Therefore, it may make composite wood of the invention in such a way that the heating of microwave fixed point and electrothermal piece are integrally heated
Expect that temperature is uniform everywhere in the curing process for product.Therefore, recombination energy field heating provided by the invention is directed to microwave
The part of composite product is especially heated and is solidified, by the composite material I of certain concrete shape, material and size
After the heating parameters research of part is clear, electrothermal piece is used in combination, whole heating is carried out to workpiece, may make that heat curing process is whole
Body uniform, controllable, to obtain high performance product product.Or in the present invention before composite material is heating and curing first outside it
One layer of strong absorbing material is set at the area on surface, enhances the microwave energy absorption of portion on composite material.Equally
The effect that microwave fixed point heating is integrally heated with electrothermal piece can be played.
In addition, the present invention be series of patents or patent application CN201610025303, CN201610027791,
The improvement and innovation done on the basis of CN201610027866, CN201610030557 and CN201710214268, if this
Have in invention in the presence of not careful enough place is described, can refer to these patents or patent application is implemented.That is, the present invention also draws
Enter the content comprising these patents or patent application.
The shape of the incubator can be any moulding such as cube and cylindrical body.In the prior art for solidifying T800
The autoclave of prepreg needs pressure resistance, and tank skin is thick and solid.And the incubator in the present invention need to only provide an atmospheric pressure or be slightly above
The pressure of atmospheric pressure, so its cost is much lower.It is preferred that being provided in the incubator other than microwave cavity in the present invention for heat
The fan of gas convection current.The shake table is connected on the bottom plate of the microwave cavity using three or more helical springs, preferably extremely
Being each provided with a spring in the table top following four corners position of shake table is used to support shake table less.
The above content is combine specific preferred embodiment to the further description of the invention made, and it cannot be said that originally
The specific implementation of invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, not
Under the premise of being detached from present inventive concept, several simple deductions and replacement can also be made, all shall be regarded as belonging to guarantor of the invention
Protect range.
Claims (10)
- A kind of method of composite material 1. recombination energy field is heating and curing, including use a kind of composite material solidification equipment to composite wood Material is heating and curing, and the composite material solidification equipment includes electrothermal piece (222), shake table (7), microwave generator (1), micro- Wave chamber (2), microwave shadow shield part (3) and vacuumizing part, shake table (7) setting is in microwave cavity (2)；On shake table For placing composite material (01), the microwave generator sends microwave into microwave cavity for for the composite material heat supply, The electrothermal piece (222) is also used for as the composite material heat supply, and the microwave shadow shield part is located in microwave cavity and is used for It is covered on the outer surface of composite material, the microwave shadow shield part (3) forms by shield microwaves area and through microwave region, described It include that one or more gap enters the microwave energy in microwave cavity in composite material and by it from from gap through microwave region It absorbs；The vacuumizing part includes vacuum bag (5) and vacuum tube (8), and for will generate in composite material solidification process Gas is extracted out in time；The shake table is can provide the vibration of 5000Hz or less vibration frequency to the composite material and can mention For the shake table of the vibration of 2g or more vibration acceleration；The microwave generator and microwave shadow shield part make device to compound Material is pinpointed or is oriented heating, and the electrothermal piece makes device carry out whole heating to composite material, and the shake table is Solidifying for composite material provides the vibration acceleration of the vertical direction of 2g or more.
- 2. the method according to claim 1, wherein the electrothermal piece (222) setting is in microwave cavity (2).
- 3. the method according to claim 1, wherein described device further includes incubator (111), microwave cavity (2) Be arranged in incubator, the electrothermal piece (222) setting microwave cavity (2) outside with incubator in, contain one on the microwave cavity A or multiple vent windows or ventilation wall being made of metal honeycomb plate, for making outside in microwave cavity while shield microwaves Air-flow is unimpeded.
- 4. method according to any one of claims 1 to 3, which is characterized in that described device further includes microwave power The control system (11) outside microwave cavity is arranged in by automatically controlling microwave power control in control module (12) and control system (11) Molding block (12) and the opening and closing and/or watt level for automatically adjusting microwave generator (1).
- 5. method according to any one of claims 1 to 3, which is characterized in that in the composite material solidification process Pressure be 0.1~0.2MPa.
- 6. method according to any one of claims 1 to 3, which is characterized in that the composite material is T800 carbon fiber Reinforced epoxy prepreg is tieed up, the shake table is can provide the vibration of 2000Hz or less vibration frequency to the composite material And the shake table of the vibration of 3g or more vibration acceleration can be provided.
- 7. method according to any one of claims 1 to 3, which is characterized in that the shake table is can be to described multiple Condensation material provides the vibration of 20Hz or more vibration frequency and can provide the shake table of the vibration of 30g or less vibration acceleration.
- 8. method according to any one of claims 1 to 3, which is characterized in that the shake table is can be to described multiple Condensation material at least partly vibration of vibration frequency is provided in 30~1000Hz and can provide in 5~20g at least partly vibration plus The shake table of the vibration of speed.
- 9. method according to any one of claims 1 to 3, which is characterized in that be connected with below the shake table (7) Multiple vibration hammers, and each vibration hammer is connect with vibration hydraulic oil pipe or tracheae (71) to be provided commonly for as shake table and set The composite material set on a vibration table provides the random continual vibration of acceleration vertical direction.
- 10. method according to any one of claims 1 to 3, which is characterized in that described device further includes thermometric portion Part, and the temperature-measuring part includes temperature measuring head, data collecting instrument (42) and thermometric transmission line (43), the temperature measuring head is arranged micro- In composite material on the inside of wave shadow shield part, thermometric transmission line one end is connect with temperature measuring head, and the other end leads to described It is connect on the outside of microwave cavity with the data collecting instrument, the data collecting instrument for showing the temperature that the temperature measuring head measures in time Degree, and the data of acquisition are transmitted to control system (11) by data collecting instrument, control system is by automatically controlling microwave power control Molding block and the opening and closing and/or watt level for automatically adjusting microwave generator.
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| CN201811497425.2A CN109367055B (en) | 2018-12-07 | 2018-12-07 | A kind of recombination energy field is heating and curing the method for composite material |
| PCT/CN2019/123417 WO2020114467A1 (en) | 2018-12-07 | 2019-12-05 | Curing apparatus and curing method for composite material |
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| CN201811497425.2A CN109367055B (en) | 2018-12-07 | 2018-12-07 | A kind of recombination energy field is heating and curing the method for composite material |
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| WO2020114467A1 (en) * | 2018-12-07 | 2020-06-11 | 中南大学 | Curing apparatus and curing method for composite material |
| AU2021290451A1 (en) * | 2020-06-17 | 2023-02-02 | Vale S.A. | Device for heating a material using microwaves, method for heating a material using microwaves, and systems for heating a material using microwaves |
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| JPH0437634A (en) * | 1990-05-30 | 1992-02-07 | Nitto Boseki Co Ltd | Method and device for drying wet chopped strand |
| WO2005049746A1 (en) * | 2003-11-21 | 2005-06-02 | Daikin Industries, Ltd. | Fluorine-containing elastomer coating composition |
| KR100767815B1 (en) * | 2006-08-09 | 2007-10-17 | 한국전력공사 | Method and apparatus for synthesizing a-type and p-type of high pure zeolite using microwave heat source |
| CN105666895B (en) * | 2016-01-15 | 2017-09-15 | 中南大学 | A kind of recombination energy heater |
| CN106945307B (en) * | 2017-04-01 | 2019-01-04 | 中南大学 | The method that a kind of pair of absorbing material carries out composite heating |
| CN207527932U (en) * | 2017-10-30 | 2018-06-22 | 广州旭暻医疗科技有限公司 | A kind of controllable constant-temperature microwave heating storehouse |
| CN107827466A (en) * | 2017-11-27 | 2018-03-23 | 朱胜利 | The forming method and mould of reaction sintering silicon carbide ceramic are made using infiltration method |
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