CN103770341B - Processing system for carbon fiber reinforced composite material and controllable carbon fiber self-heating method adopting liquid molding technology - Google Patents
Processing system for carbon fiber reinforced composite material and controllable carbon fiber self-heating method adopting liquid molding technology Download PDFInfo
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- CN103770341B CN103770341B CN201410018321.4A CN201410018321A CN103770341B CN 103770341 B CN103770341 B CN 103770341B CN 201410018321 A CN201410018321 A CN 201410018321A CN 103770341 B CN103770341 B CN 103770341B
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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
- B29C70/36—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 impregnating by casting, e.g. vacuum casting
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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
Abstract
The invention discloses a processing system for a carbon fiber reinforced composite material and a controllable carbon fiber self-heating method adopting a liquid molding technology. The processing system comprises a vacuum bag encapsulation system, a positive foil electrode, a negative foil electrode, a low-voltage regulator, a program control temperature regulator and a temperature sensor, wherein the positive foil electrode and the negative foil electrode are arranged at two ends of a continuous carbon fiber; the continuous carbon fiber is arranged in a vacuum bag; the low-voltage regulator supplies heat to the continuous carbon fiber; the heat is controlled by the program control temperature regulator. The quick carbon fiber self-heating method adopting the liquid molding technology, which is disclosed by the invention, can realize quick heating of a carbon fiber spreading layer; a program controllable quick heating method is supplied to the liquid molding technology and other carbon fiber reinforced component material molding technologies, so that the heating time and the cooling time in a composite material molding process are greatly shortened, and a technical support is supplied to quick molding of the carbon fiber reinforced composite material.
Description
Technical field
The present invention relates to a kind of building mortion and method of fibre reinforced composites, more particularly, refer to that a kind of vacuum bag that adopts presses the shaping and the device thereof that carry out fibre reinforced composites with the combined method loading electrode, fabric achieves fiber from heating under the condition loading positive and negative electrode.
Background technology
In July, 2009, " composite handbook " that Chemical Industry Press publishes, the chief editors such as beneficial little Su.314th page of Fig. 6 .2-50 describes vacuum bag pressure method.Vacuum bag pressure method, this method is by uncured goods good for manual lay, and add lid layer vacuum bag film, goods are between vacuum bag film and mould, seal perimeter, vacuumizes and the bubble in goods and volatile matter are got rid of.
Solidification in advanced composite material is the critical stage that in forming process, material property transforms, the higher solidification temperature of general needs and longer cure cycle.Traditional heating means are all utilize heat conducting principle, provide thermal source by outside, by outer and inner to fibre reinforced materials carry out conduction heat.The deficiency of this heating means is:
One is, heating rate is low, and arriving target temperature needs the longer heating-up time, adds manufacturing cost.
Two are, conduction heating can cause by outer and interior thermograde, and especially for thick cross section composite, the thermograde on thickness direction is more obvious.Temperature on this thickness direction is uneven, adds the curing reaction heat release of resin matrix, first causes solidification process to be difficult to control, secondly very easily causes solidification uneven, the serious Forming Quality reducing composite, even shaping failure.
Three are, capacity usage ratio is low, cause energy dissipation.
Therefore, develop new heating technique, shorten the heat time, improve capacity usage ratio, for the molding cycle shortening composite, reduce manufacturing cost, and then promote the scale application of advanced composite material, all significant.
In Chinese Patent Application No. 200310113547.4, November 17 2003 applying date, denomination of invention " the self-resistance hot briquetting method of carbon fibre reinforced composite ".Disclose a kind of conductive carbon in this patent application, graphite fibre strengthens the method that self-resistance that the self-resistance of polymer matrix composites heats rapid-result type and fibre-reinforced thermoplastic composite adds thermal weld or repairs.Its technical solution is, according to the general moulding process of composite, by the prepreg overlay of continuous carbon fibre composite material, put in press, difference installing insulating layer between the upper and lower table top of press and prepreg, between insulating barrier and prepreg, add loading electrode, being formed with prepreg is the conductive channel of resistance.Then connect AC power, adjustment voltage, make current value progressively reach predetermined value, wherein current flux is generally 0.02A/mm
2, pressure effect about 3 ~ 5 minutes.Again according to the general moulding process of composite, cooling, the demoulding, both plastic composite.When the composite of shaping different special shape, spread by prepreg in corresponding metal die, between the upper and lower plane and press table top of metal die, install insulating barrier additional, the upper and lower plane of metal die is connected with AC power as electrode.
Summary of the invention
In order to solve Problems existing in current advanced composite material solidification process, an object of the present invention is to provide a kind of system of processing preparing fibre reinforced composites adopting vacuum bag pressure method and load electrode combination, this system in vacuum bag compression mould, increases paper tinsel positive and negative electrode, resin perfusion cannula and vacuumizes conduit, instruct low pressure modulator to carry out fiber by programed temperature modulator to be cured from heating, fiber Fast Heating, heating rate is controlled, and carbon fibre reinforced composite forming process is simple to operation.
Two of object of the present invention is a kind of carbon fiber self-heating methods adopting vacuum bag pressure method and load electrode combination of proposition, and the method employing paper tinsel positive and negative electrode realizes the quick of fiber in liquid forming process and certainly heats, and can shorten hardening time and cool time.
The present invention is a kind of controllable carbon fiber self-heating method adopting liquid molding process, it is characterized in that including the following step:
Step one: conducting fibre fabric cuts out preparation;
Conducting fibre fabric can be the carbon back continuous-filament woven fabric with conductive capability;
Step 2: vacuum bag pressure method mould prepares;
Mold cleaning, clears up smooth by mould inner surface, then with analyzing the cleaning of pure grade acetone, after acetone volatilization, obtain the mould of surfacing cleaning;
Step 3: priming by vacuum resin raw material is prepared;
The catalyst of the curing agent of 0 ~ 20 weight portion, the diluent of 0 ~ 20 weight portion, the promoter of 0 ~ 3 weight portion, the initator of 0 ~ 4 weight portion and 0 ~ 10 weight portion is added in the base resin of 100 weight portions; Then be uniformly mixed under temperature is 20 ~ 200 DEG C of conditions, then under vacuum pressure is 0.05 ~ 0.09MPa, vacuumize process 10 ~ 60min after, obtain priming by vacuum resin raw material;
Base resin is thermosetting resin or thermoplastic resin;
Thermosetting resin can be epoxy resin, unsaturated polyester resin, cyanate ester resin etc.; Thermoplastic resin can be polyurethane, nylon, cyclic polyester;
Step 4: fabric and positive and negative foil electrode laying;
Mould after step 2 process carries out lay down fibre fabric according to fabric ply sequence, and foil electrode is set according to positive and negative foil electrode lay mode;
Step 5: vacuumize while perfusion resin;
Open vavuum pump, vacuumize 1 ~ 2min, then exit, repeat to vacuumize venting 5 ~ 20 times;
Open resin raw material perfusion valve, by-pass valve control flow velocity;
Perfusion resin under the condition vacuumizing 0.05 ~ 0.09MPa;
Step 6: load the preparation that low-voltage and high-current carries out heating fibre reinforced composites product certainly;
Opening program control temperature modulator, after low-voltage modulator, the voltage being no more than 50V exported from described low-voltage modulator and the current load being no more than 300A, on positive and negative foil electrode, being conducted electricity by continuous-filament woven fabric, reaching fiber from being heating and curing resin.
The system of processing of carbon fibre reinforced composite of the present invention, this system is the laying of carrying out continuous-filament woven fabric in vacuum bag encapsulating mould (1), when lay down fibre fabric process, is spread by positive and negative foil electrode (2) at the two ends of continuous-filament woven fabric; Then place resin duct (73) in the one end of the fabric completed, the other end is placed and is vacuumized conduit (71);
In order to measure the temperature of fabric heating, temperature sensor (3) is inserted with in the fabric completed, temperature sensor (3) is connected with programed temperature modulator (5), and programed temperature modulator (5) is according to the real time temperature K of temperature sensor (3) Real-time Collection
in real timewith design temperature K
settingcompare, as real time temperature K
in real timehigher than design temperature K
settingtime, output voltage signal U
into low pressure modulator (4), low pressure modulator (4) is stopped positive and negative foil electrode power output;
In order to the heating temperature profile set according to programed temperature modulator (5) carries out the output power of low pressure modulator (4), after system of processing is ready to complete, programed temperature modulator (5) first exports starting voltage signal D
intrigger low-voltage modulator (4) enters duty.
The advantage that the present invention prepares the system of fibre reinforced composites is:
1. present system by setting up temperature control, low voltage control and loading electrode in existing vacuum bag pressing system, reduces the cost making fibre reinforced composites, shorten fabrication cycle.
2. resin is in the curing process compared with convection oven, and the present invention heats under normal temperature environment, and naturally cooling under being also simultaneously normal temperature in the process of cooling, both processing environments are different.
3. change heating rate by the operating voltage of adjustment loading low pressure modulator, the speed of heating can adjust according to shaping needs.
4. compared with conventional heating methods, the advantages such as the inventive method has the heating of employing low-voltage, handling safety, energy-saving and cost-reducing.
Accompanying drawing explanation
Fig. 1 is the structural representation of system of processing of the present invention.
Figure 1A is the base plate schematic diagram of vacuum bag encapsulating mould.
Figure 1B is the structure chart vacuumizing conduit in the present invention.
Fig. 1 C is the structure chart of resin duct in the present invention.
Fig. 2 be the present invention on vacuum bag encapsulating mould lay continuous-filament woven fabric, the first kind of way structure chart of foil electrode is set.
Fig. 2 A be the present invention on vacuum bag encapsulating mould lay continuous-filament woven fabric, the second way structure chart of foil electrode is set.
Fig. 2 B be the present invention on vacuum bag encapsulating mould lay continuous-filament woven fabric, the third mode structure chart of foil electrode is set.
Fig. 2 C be the present invention on vacuum bag encapsulating mould lay continuous-filament woven fabric, the 4th kind of mode structure chart of foil electrode is set.
Fig. 3 is the lay mode schematic diagram of fabric of the present invention.
Fig. 4 is the heating temperature profile figure arranged in programed temperature modulator of the present invention.
Fig. 5 be in embodiment 1 on vacuum bag encapsulating mould lay continuous-filament woven fabric, the structure chart of foil electrode is set.
Fig. 6 be in embodiment 2 on vacuum bag encapsulating mould lay continuous-filament woven fabric, the structure chart of foil electrode is set.
| 1. vacuum bag encapsulating mould | 2. positive and negative foil electrode group | The positive foil electrode of 2A. |
| 2B. bears foil electrode | The positive foil electrode of 2A1. first | The negative foil electrode of 2B1. first |
| The positive foil electrode of 2A2. second | The negative foil electrode of 2B2. second | The positive foil electrode of 2A3. the 3rd |
| The negative foil electrode of 2B3. the 3rd | The positive foil electrode of 2A4. the 4th | The negative foil electrode of 2B4. the 4th |
| The positive foil electrode of 2A5. the 5th | The negative foil electrode of 2B5. the 5th | 3. temperature sensor |
| 4. low pressure modulator | 5. programed temperature modulator | 6. the container of filling resin |
| 61. second tube connectors | 62. second valves | 71. vacuumize conduit |
| 72. first through holes | 73. resin ducts | 74. second through holes |
| 8. vavuum pump | 81. first tube connectors | 82. first valves |
| 9. conductive fibers | 9A. first conductive fibers | 9B. second conductive fibers |
| 9C. the 3rd conductive fibers | 9D. the 4th conductive fibers | 9E. the 5th conductive fibers |
| 9F. the 6th conductive fibers | 9G. the 7th conductive fibers | 9H. the 8th conductive fibers |
| 9J. the 9th conductive fibers |
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Shown in Figure 1, the present invention is a kind of system of processing adopting the carbon fibre reinforced composite of vacuum bag pressure method and loading electrode combination, and this system is on the basis of vacuum bag pressing formation equipment, increase low pressure modulator 4, programed temperature modulator 5 and paper tinsel positive and negative electrode group 2.
Carbon fibre reinforced composite system of processing of the present invention, this system is the laying of carrying out continuous-filament woven fabric in vacuum bag encapsulating mould 1, when lay down fibre fabric process, is spread by positive and negative foil electrode 2 at the two ends of continuous-filament woven fabric; Then place resin duct 73 in the one end of the fabric completed, the other end is placed and is vacuumized conduit 71; In order to measure the temperature of fabric heating, in the fabric completed, be inserted with temperature sensor 3, temperature sensor 3 is connected with programed temperature modulator 5, and programed temperature modulator 5 is according to the real time temperature K of temperature sensor 3 Real-time Collection
in real timewith design temperature K
settingcompare, as real time temperature K
in real timehigher than design temperature K
settingtime, output voltage signal U
into low pressure modulator 4, low pressure modulator 4 is stopped positive and negative foil electrode power output.In order to the heating temperature profile set according to programed temperature modulator 5 carries out the output power of low pressure modulator 4, after system of processing is ready to complete, programed temperature modulator 5 first exports starting voltage signal D
intrigger low-voltage modulator 4 enters duty.Described starting voltage signal D
inwith design temperature K
settingrelevant.
Carbon fibre reinforced composite system of processing of the present invention, this system include vacuum bag encapsulating mould 1, vavuum pump 8, filling resin container 6, programed temperature modulator 5, low pressure modulator 4, temperature sensor 3, positive and negative foil electrode group 2, vacuumize conduit 71 and resin duct 73; Vacuumize conduit 71 to be connected with vavuum pump 8 by the first tube connector 81, and the first tube connector 81 is provided with the second valve 82; Resin duct 73 is connected with the container 6 of filling resin by the second tube connector 61, and the second tube connector 61 is provided with the first valve 62; Temperature sensor 3 is connected with programed temperature modulator 5, and positive and negative foil electrode group 2 is connected with low pressure modulator 4, and programed temperature modulator 5 is connected with low pressure modulator 4.Continuous-filament woven fabric is laid in vacuum bag encapsulating mould 1.
Vacuum bag encapsulating mould 1
Vacuum bag encapsulating mould 1 puts fabric for auxiliary.
In the present invention, vacuum bag encapsulating mould 1 is the common die in conventional composite processing.
See the schematic diagram of the flat plate mold shown in Figure 1A, this figure uses the die drawing in the 314th page of Fig. 6 .2-50 of " composite handbook ".The lay mode of positive and negative foil electrode group 2 and conductive fibers for convenience of description, the thickness direction of mould is designated as Z, and the length direction of mould is designated as X, and the width of mould is designated as Y.One end of mould is called that A holds, and the other end of mould is called that B end is under the coordinate system O-XYZ of mould, and vacuumize the A end that conduit 71 is arranged on mould, resin duct 73 is arranged on the B end of mould, vacuumizes the two ends that conduit 71 and resin duct 73 are oppositely arranged on mould.
Shown in Fig. 1, Figure 1B, vacuumize conduit 71 and be provided with the first through hole 72, the air in mould, under the condition of negative pressure that provides at vavuum pump 8, is got rid of by this first through hole 72.The conduit 71 that vacuumizes with the first through hole 72 is inserted in mould, and the other end vacuumizing conduit 71 is connected with the first tube connector 81, first tube connector 81 is provided with the first valve 82, and this first valve 82 is for opening or closing vacuum gas, and the other end of the first tube connector 81 is connected on vavuum pump 8.
Shown in Fig. 1, Fig. 1 C, resin duct 73 is provided with the second through hole 74, and this second through hole 74, under the condition of negative pressure that provides at vavuum pump 8, makes the resin in the container 6 of filling resin flow out.Resin duct 73 with the second through hole 74 is inserted in vacuum bag, and the other end of resin duct 74 is connected with the second tube connector 61, second tube connector 61 is provided with the second valve 62, this second valve 62 flows out for opening or close resin, and the other end of the second tube connector 61 is connected on the container 6 of filling resin.
In the present invention, the negative pressure produced by vavuum pump 8 and the combination vacuumizing conduit 71 and resin duct 73, provided the direction of flowing out the flowing of resin from the container 6 of filling resin, be conducive to vacuumizing while perfusion resin.
Positive and negative foil electrode group
Positive and negative foil electrode group is laid in the two ends of continuous-filament woven fabric 9 relatively, and the mode of positive and negative foil electrode group lay has same layer lay and interval lay.The fiber that continuous-filament woven fabric 9 refers in fabric does not disconnect, continuous fiber be conducive to conduction.
Positive and negative foil electrode group is used for fabric 9 is conducted electricity, and the fabric after conduction self produces heat under the condition loading big current, and this heat impels resin generation chemical crosslink reaction.The heat that the heat that resin solidification needs produces from fiber self electrical heating, and the heat usually needed for resin solidification all comes from other thermal source beyond fiber, therefore fiber self electrical heating in this patent is called from heating.
Positive and negative foil electrode group 2 can select gold-foil electrode, silver foil electrode, copper foil electrode, foil electrode and gold, silver, copper, aluminium grid electrode.The size of electrode 2: length is designated as A
electrode, be widely designated as B
electrode, height is designated as C
electrode.Usually, C
electrode=0.1mm, A
electrode=10B
electrode~ 20B
electrode.A
electrodeequal B
product.
In the present invention, electrode 2 be positive and negative with the use of.The radical of required positive and negative electrode 2 is relevant to the number of plies additionally arranging fabric.If the number of plies of fabric is designated as n, the radical of required positive and negative electrode 2 is designated as D, then D=α × n, α are electrode loading coefficient, and α=0.3 ~ 0.5,
ρ represents the volume density of fiber, ρ
facerepresent the surface density of fabric, V
frepresent the volume fraction of fibre reinforced composites, C
finished productrepresent the thickness of fibre reinforced composites.
The paving mode of positive and negative foil electrode group 2:
Shown in Figure 2, with the positive and negative foil electrode group of layer lay; Namely conductive fibers 9 is along the Y direction lay of mould, and positive foil electrode 2A is laid in one end (namely mould A holds) of conductive fibers 9, and negative foil electrode 2B is laid in the other end (namely mould B holds) of conductive fibers 9.
Shown in Fig. 2 A, with the positive and negative foil electrode group of layer lay; Namely conductive fibers 9 is along the Y direction lay of mould, and positive foil electrode 2A is laid in one end (namely mould A holds) of conductive fibers 9, and negative foil electrode 2B is laid in the other end (namely mould B holds) of conductive fibers 9; First conductive fibers 9A is along the Y direction lay of mould, and the first positive foil electrode 2A1 is laid in one end (namely mould A holds) of the first conductive fibers 9A, and the first negative foil electrode 2B1 is laid in the other end (namely mould B holds) of the first conductive fibers 9A.
Shown in Fig. 2 B, the positive and negative foil electrode group of interval lay; Namely the second conductive fibers 9B is along the Y direction lay of mould, and the second positive foil electrode 2A2 is laid in one end (namely mould A holds) of the second conductive fibers 9B; 3rd conductive fibers 9C is along the Y direction lay of mould, and the second negative foil electrode 2B2 is laid in the other end (namely mould B holds) of the 3rd conductive fibers 9C; 4th conductive fibers 9D is along the Y direction lay of mould, and the 3rd positive foil electrode 2A3 is laid in one end (namely mould A holds) of the 4th conductive fibers 9D; 5th conductive fibers 9E is along the Y direction lay of mould, and the 3rd negative foil electrode 2B3 is laid in the other end (namely mould B holds) of the 5th conductive fibers 9E.
Shown in Fig. 2 C, the positive and negative foil electrode group of interval lay; Namely the 6th conductive fibers 9F is along the Y direction lay of mould, 4th positive foil electrode 2A4 is laid in one end (namely mould A holds) of the 6th conductive fibers 9F, and the 4th negative foil electrode 2B4 is laid in the other end (namely mould B holds) of the 6th conductive fibers 9F; 7th conductive fibers 9G is along the Y direction lay of mould, 8th conductive fibers 9H is along the Y direction lay of mould, 9th conductive fibers 9J is along the Y direction lay of mould, 5th positive foil electrode 2A5 is laid in one end (namely mould A holds) of the 9th conductive fibers 9J, and the 5th negative foil electrode 2B5 is laid in the other end (namely mould B holds) of the 9th conductive fibers 9J.
In the present invention, positive and negative foil electrode is arranged on the continuous-filament woven fabric two ends after laying, can ensure to carry out homogeneous heating to fabric, simultaneously the different modes of emplacements of positive and negative foil electrode can ensure every one deck fabric in vacuum bag can and electrode contact.
In order to ensure that the fiber in conductive fibers 9 can conduct electricity, the fiber in conductive fibers 9 is successional.
The lay mode of conductive fibers 9:
Conductive fibers can be one-way fabric, plain cloth, twills, satin fabric, WARP-KNITTING etc.
Shown in Figure 3, the laying of conductive fibers can be quasi-isotropic laying [0/90/ ± 45]
s, s represents with middle symmetry, with reference to May in 2004 the 1st edition, " advanced composite material manufacturing technology " that Li Hongyun etc. translate the 11st page of Fig. 1 .9.
The laying of conductive fibers can be orthogonal laying [0/90]
n, n represents the quantity of sub-laying.The laying of conductive fibers can be unidirectional laying [0]
n.
Temperature sensor 3
Temperature sensor 3, for gathering the temperature change value of fabric, is designated as real time temperature K
in real time.
Temperature sensor 3 is placed in the auxiliary layer of fabric.
In the present invention, thermocouple selected by temperature sensor 3.
Programed temperature modulator 5
Programed temperature modulator 5 one aspect is for receiving the real time temperature K of temperature sensor 3
in real time, the real time temperature K will received on the other hand
in real timewith design temperature K
threshold valuerelatively, if K
in real time>=K
threshold valuetime, do not export triggering signal U
in; If K
in real time< K
threshold value, export triggering signal U
into low pressure modulator 4.
In the present invention, design temperature K is passed through in programed temperature modulator 5
threshold value(ordinate) and heat time (abscissa) control the power that low pressure modulator 4 exports, as shown in Figure 4.The temperature shown in Fig. 4 and heating temporal profile, only for illustration of multistage heating rate, and arrive the temperature retention time relation under uniform temperature.
In the present invention, by design temperature K
threshold valueheating rate control export voltage and current.Described heating rate comprises first paragraph heating rate and second segment heating rate.First paragraph heating rate is 0.4 DEG C/s ~ 1.0 DEG C/s, and second segment heating rate is 0.3 DEG C/s ~ 0.8 DEG C/s.
In the present invention, the programed temperature modulator 5 AI-518/519 serial universal artificial intelligence temperature controller of selecting Xiamen space electric automation Science and Technology Ltd. to produce.
Low pressure modulator 4
The power input of low pressure modulator 4 is the civil power of 220V, 50A, and the power of low pressure modulator 4 output is that voltage is no more than 50V and electric current is no more than 300A.Civil power converts low-voltage and high-current to through low pressure modulator 4 and is loaded in positive and negative paper tinsel (grid) electrode group 2.Low pressure modulator 4 receives starting voltage signal D
inafter enter duty, and the power output of low pressure modulator 4 is according to design temperature K
settingto carry out with heating temporal profile.
In the present invention, low-voltage modulator 4 be carried on positive and negative paper tinsel (grid) electrode 2 voltage is designated as U, electric current is designated as I, U is no more than 50V and I is no more than 300A.
In the present invention, the low pressure modulator 4 MMT-DC24RT50BL model low pressure controller of selecting subelectron scientific & technical corporation of Jinan section to produce.
The present invention adopts the controllable carbon fiber self-heating method of liquid molding process
The vacuum bag pressure method of application the present invention design heats the method that system of processing carries out Product processing certainly with the fibre reinforced composites loading electrode combination, comprises the following steps:
Step one: conducting fibre fabric cuts out preparation;
Conducting fibre fabric can be the carbon back continuous-filament woven fabric with conductive capability.
Particularly, conducting fibre fabric can be carbon fibre fabric, graphite fiber fabric, carbon nano-tube fibre fabric and composite fibre fabric.
Composite fibre fabric can be the fabric that carbon fiber that carbon fiber accounts for 1 ~ 99% weight portion mixes with graphite fibre.
Composite fibre fabric can be the fabric that carbon fiber that carbon fiber accounts for 1 ~ 99% weight portion mixes with carbon nano-tube fibre.
Composite fibre fabric can be the fabric that carbon fiber that carbon fiber accounts for 1 ~ 99% weight portion mixes with glass fibre.
The concrete model of carbon fiber is T300 grade carbon fiber, T700 grade carbon fiber, T800 grade carbon fiber, T1000 grade carbon fiber or other carbon fiber trade mark.
The concrete model of graphite fibre can be M40, M40J, M55J, M60J or other carbon fiber trade mark.
In the present invention, form of fabric can be one-way fabric, plain cloth, twills, satin fabric, WARP-KNITTING.
In the present invention, the fiber in the fabric between two positive and negative electrodes is continuous print.
Step 2: vacuum bag pressure method mould prepares;
Mold cleaning, clears up smooth by mould inner surface, then with analyzing the cleaning of pure grade acetone, after acetone volatilization, obtain the mould of surfacing cleaning;
Mould coating release agent, the mould of surfacing cleaning evenly coats releasing agent, obtains the mould of releasing agent;
Releasing agent can be DL-T01, DL-Q01, DL-G01, DL-B01 or other releasing agent.
Step 3: priming by vacuum resin raw material is prepared;
The curing agent of 0 ~ 20 weight portion, the diluent of 0 ~ 20 weight portion, the promoter of 0 ~ 3 weight portion, the initator of 0 ~ 4 weight portion, the catalyst of 0 ~ 10 weight portion can be added in the resin matrix of 100 weight portions;
Base resin is thermosetting resin or thermoplastic resin; Thermosetting resin can be epoxy resin, unsaturated polyester resin, cyanate ester resin etc.; Thermoplastic resin can be polyurethane, nylon, cyclic polyester.
Epoxy resin can be E51 type epoxy resin, E44 type epoxy resin, E20 type epoxy resin, AG80 type epoxy resin, TDE85 type epoxy resin etc.
Resin system includes epoxy resin-base, curing agent, diluent, promoter; The resin adhesive liquid of 100 weight portions needs 75 ~ 85 parts by weight resin hosts, 5 ~ 8 weight portion curing agent, 5 ~ 20 parts by weight diluent, 1 ~ 3 weight portion promoter.Curing agent can be amine curing agent, acid anhydride type curing agent, imidazole curing agent, metal complex type curing agent.Diluent can be reactive glycidoxy ethers organic matter and low-molecular-weight epoxy resin.Promoter can be tertiary amine and derivative, quaternary ammonium salt, substituted urea, imidazole and its derivants.
Unsaturated polyester (UP) can be adjacent benzene-type, metaphenylene, p-phenyl, bisphenol A-type, vinyl ester type.Initator can be benzoyl peroxide-tertiary amine system, cyclohexanone peroxide-cobalt naphthenate system, and promoter can be cobalt naphthenate, cobalt iso-octoate, manganese naphthenate, manganese iso-octoate, dimethyl benzylamine, diethyl benzylamine.
Cyanate ester resin can be bisphenol A cyanate ester resin, Novolac Cyanate Ester Resins.Catalyst can be the compound containing active hydrogen such as phenols (conventional nonyl phenol), amine (conventional triethylamine) and imidazoles.Also can be AlCl
3, BF
3, FeCl
3deng transition metal organometallic compound.
Polyurethane can be dual-component polyurethane, monocomponent polyurethane.
Nylon can be nylon66 fiber, nylon 1010, nylon 1212.
Cyclic polyester can be CBT160 cyclic polyester and CBT500 cyclic polyester.
In the present invention, the preparation temperature of epoxy resin, unsaturated polyester (UP), cyanate ester resin, polyurethane and nylon glue glue is 20 ~ 200 DEG C, is uniformly mixed and obtains the first resin adhesive liquid; Then vacuumize described first resin adhesive liquid, vacuum pressure is 0.05 ~ 0.09MPa, pumpdown time 10 ~ 60min, obtains the second resin adhesive liquid.
Vacuumizing the first resin adhesive liquid mixed is to get rid of the bubble produced under stirring in the first resin adhesive liquid.Vacuumize the good infiltration that the second resin adhesive liquid after bubble removing process is conducive to fiber in resin filling process, make the porosity of the fibre reinforced composites finished product obtained lower.
Step 4: fabric and positive and negative foil electrode laying;
Mould after processing through step 2 carries out lay fabric according to fabric ply sequence, and electrode is set according to electrode lay mode, according to the finished product thickness C of required lay
productthe fiber number of plies is set.
Conductive fibers can be one-way fabric, plain cloth, twills, satin fabric, WARP-KNITTING.
Shown in Figure 3, the laying of conductive fibers can be quasi-isotropic laying [0/90/ ± 45]
s, s represents with middle symmetry, with reference to May in 2004 the 1st edition, " advanced composite material manufacturing technology " that Li Hongyun etc. translate the 11st page of Fig. 1 .9.
The laying of conductive fibers can be orthogonal laying [0/90]
n, n represents sub-laying quantity.The laying of conductive fibers can be unidirectional laying [0]
n.
Shown in Figure 2, with the positive and negative foil electrode group of layer lay; Namely conductive fibers 9 is along the Y direction lay of mould, and positive foil electrode 2A is laid in one end (namely mould A holds) of conductive fibers 9, and negative foil electrode 2B is laid in the other end (namely mould B holds) of conductive fibers 9.
Shown in Fig. 2 A, with the positive and negative foil electrode group of layer lay; Namely conductive fibers 9 is along the Y direction lay of mould, and positive foil electrode 2A is laid in one end (namely mould A holds) of conductive fibers 9, and negative foil electrode 2B is laid in the other end (namely mould B holds) of conductive fibers 9; First conductive fibers 9A is along the Y direction lay of mould, and the first positive foil electrode 2A1 is laid in one end (namely mould A holds) of the first conductive fibers 9A, and the first negative foil electrode 2B1 is laid in the other end (namely mould B holds) of the first conductive fibers 9A.
Shown in Fig. 2 B, the positive and negative foil electrode group of interval lay; Namely the second conductive fibers 9B is along the Y direction lay of mould, and the second positive foil electrode 2A2 is laid in one end (namely mould A holds) of the second conductive fibers 9B; 3rd conductive fibers 9C is along the Y direction lay of mould, and the second negative foil electrode 2B2 is laid in the other end (namely mould B holds) of the 3rd conductive fibers 9C; 4th conductive fibers 9D is along the Y direction lay of mould, and the 3rd positive foil electrode 2A3 is laid in one end (namely mould A holds) of the 4th conductive fibers 9D; 5th conductive fibers 9E is along the Y direction lay of mould, and the 3rd negative foil electrode 2B3 is laid in the other end (namely mould B holds) of the 5th conductive fibers 9E.
Shown in Fig. 2 C, the positive and negative foil electrode group of interval lay; Namely the 6th conductive fibers 9F is along the Y direction lay of mould, 4th positive foil electrode 2A4 is laid in one end (namely mould A holds) of the 6th conductive fibers 9F, and the 4th negative foil electrode 2B4 is laid in the other end (namely mould B holds) of the 6th conductive fibers 9F; 7th conductive fibers 9G is along the Y direction lay of mould, 8th conductive fibers 9H is along the Y direction lay of mould, 9th conductive fibers 9J is along the Y direction lay of mould, 5th positive foil electrode 2A5 is laid in one end (namely mould A holds) of the 9th conductive fibers 9J, and the 5th negative foil electrode 2B5 is laid in the other end (namely mould B holds) of the 9th conductive fibers 9J.
The size of the fibre reinforced composites finished product after machining: length is designated as A
product, be widely designated as B
product, thickness is designated as C
product.
The auxiliary number layer by layer of fabric
v
frepresent the fiber volume fraction of fibre reinforced composites finished product, ρ represents the density of fiber, ρ
facerepresent the surface density of fabric.
Step 5: vacuumize while perfusion resin;
Open vavuum pump, vacuumize 1 ~ 2min, then exit, repeat extraction gas 5 ~ 20 times; In the present invention, adopting intermittent mode forvacuum repeatedly, is to make fabric closely knit.
Open resin perfusion valve, by-pass valve control flow velocity, namely controls the flow velocity of resin.
Perfusion resin under the condition vacuumizing 0.05 ~ 0.09MPa, resin flows along the direction vacuumizing conduit, namely along the direction flowing vacuumized.
Step 6: load the preparation that low-voltage and high-current carries out heating fibre reinforced composites product certainly;
Opening program control temperature modulator 5, low-voltage modulator 4, the power that low-voltage modulator 4 exports is carried on positive and negative foil electrode 2.The power of low pressure modulator 4 output is that voltage is no more than 50V and electric current is no more than 300A.
Certainly adding after thermal fiber completes resin solidification, cool at normal temperatures, the demoulding, obtained carbon fibre reinforcement product.Then Performance Detection is carried out to obtained product.
embodiment 1
Unidirectional T700 carbon fibre fabric/CYD128 epoxy resin-base composite material from hot briquetting.
Technique describes: at the environment temperature of job shop is 30 DEG C, carries out conventional cleaning, then be coated with DL-T01 releasing agent to vacuum bag encapsulating mould 1; Then spread continuous unidirectional fabric by quasi-isotropic laying, to complete after fabric by vacuum pump evacuation 2min, then exit, repeat extraction gas 15 times; Ready resin adhesive liquid is entered in carbon fiber laying, after resin has poured in the auxiliary lower perfusion of vacuum 0.07MPa; Start-up routine control temperature modulator 5, low-voltage modulator 4, be then warming up to 120 DEG C with the speed of 0.8 DEG C/s, keeps 5min at 120 DEG C, and disconnected power down source, naturally cools to 35 DEG C, the demoulding, obtain carbon fiber reinforced composite-material laminates afterwards.
Add the methylimidazole of 15 weight portions in the CYD128 epoxy resin of described 100 weight portions, the adipic acid diglycidyl ether of 15 weight portions, 2,4,6-tri-(dimethylamino methyl) phenol of 1 weight portion is made into resin adhesive liquid.CYD128 epoxy resin is that Hunan Yueyang Ba Ling petrochemical industry Co., Ltd produces.
Spread unidirectional T700 carbon fibre fabric laying number be 10 layers, to spread positive and negative copper foil electrode be 5 right, lay mode is as shown in Figure 5.Upwards laying is carried out from die bottom plate, after lay the 1st, 2 layers of fabric, and at the two ends lay the 1st of the 2nd layer of fabric to positive and negative copper foil electrode, then circulate such laying, respectively at the 4th, 6,8,10 layer of lay the 2nd, 3,4,5 to positive and negative copper foil electrode.
The composite-material laminates obtained to embodiment 1 carries out performance evaluation, and wherein, fiber volume fraction is 49%, porosity is 0.8%, glass transition temperature is 95 DEG C, curing degree is 99%, bending strength is 832MPa, interlaminar shear strength is 45MPa.
Bending strength test embodiment 1 being obtained to laminate performs according to GB/T3356-1999.Interlaminar shear strength test performs according to ISO14130-1997.
The laminate obtained from embodiment 1 samples, and polishes, polishing to cross section, by the fiber distribution of optics digital metallographic microscope observation layer intralamellar part and defect condition.Carry out testing its fiber volume fraction of rear calculating and porosity according to GB/T3365-2008.
The glass transition temperature (Tg) embodiment 1 being obtained to laminate is tested by DMTA.Loss modulus is adopted to calculate glass transition temperature.DMTA tests employing 3 curved patterns, and heating scan speed is 5 DEG C/min, and vibration frequency is 1Hz.The curing degree of composite-material laminates is tested by DSC.Heating scan speed is 5 DEG C/min.
embodiment 2
The adjacent benzene-type unsaturated polyester resin composite material of unidirectional T700 carbon fibre fabric/TM-21 from hot briquetting.
Technique describes: under 25 DEG C of conditions, carries out conventional cleaning, then be coated with DL-B01 releasing agent to vacuum bag encapsulating mould 1; Then by quasi-isotropic laying paving continuous-filament woven fabric, to complete after fabric by vacuum pump evacuation 2min, then exit, repeat extraction gas 10 times; Ready resin is entered in carbon fiber laying, after resin has poured in the auxiliary lower perfusion of vacuum 0.05MPa; Start-up routine control temperature modulator 5, low-voltage modulator 4, then 65 DEG C are warming up to the speed of 0.5 DEG C/s, and 4h is kept at 65 DEG C, 80 DEG C are warming up to subsequently with the speed of 0.3 DEG C/s, and 3h is kept at 80 DEG C, disconnected power down source, naturally cools to room temperature afterwards, the demoulding, obtains qualified composite-material laminates.
The N of 3 weight portions can be added, the cobalt naphthenate of N dimethylaniline, 1 weight portion in the adjacent benzene-type unsaturated polyester resin of TM-21 of described 100 weight portions.The adjacent benzene-type unsaturated polyester resin of described TM-21 is that Tianmo Group Co., Ltd., Changzhou produces.
Spread unidirectional T700 carbon fibre fabric laying number be 11 layers, to spread positive and negative copper mesh electrode be 3 right, lay mode is as shown in Figure 6.Upwards laying is carried out from die bottom plate, after lay the 1st layer of fabric, and at the two ends lay the 1st of the 1st layer of fabric to positive and negative copper mesh electrode, then after 6 layers, lay down fibre fabric, lay the 2nd is to positive and negative copper mesh electrode again, then after 3 layers, lay down fibre fabric, then lay the 3rd is to positive and negative copper mesh electrode, finally spreads 11th layer fabric.
The composite-material laminates obtained to embodiment 2 carries out performance evaluation, and wherein, fiber volume fraction is 49.5%, porosity is 1.0%, glass transition temperature is 98 DEG C, curing degree is 98%, bending strength is 900MPa, interlaminar shear strength is 44MPa.
embodiment 3
Graphite fiber fabric/G300 unsaturated polyester resin composite material from hot briquetting.
Technique describes: under 25 DEG C of conditions, carries out conventional cleaning, then be coated with DL-T01 releasing agent to vacuum bag encapsulating mould 1; Then by quasi-isotropic laying paving continuous-filament woven fabric, to complete after fabric by vacuum pump evacuation 2min, then exit, repeat extraction gas 20 times; Ready resin is entered in graphite fibre laying, after resin has poured in the auxiliary lower perfusion of vacuum 0.09MPa; Start-up routine control temperature modulator 5, low-voltage modulator 4, be then warming up to 80 DEG C with the speed of 0.6 DEG C/s, keeps 4.5h at 80 DEG C, and disconnected power down source, naturally cools to room temperature, the demoulding, obtain qualified composite-material laminates afterwards.
Benzoyl peroxide/the DMA of 3 weight portions, the cobalt naphthenate of 1 weight portion can be added in the G300 unsaturated polyester resin of described 100 weight portions.Described G300 unsaturated polyester resin is that Ya Shilan company of the U.S. produces.
Spread unidirectional M40 graphite fiber fabric laying number be 10 layers, to spread positive and negative copper foil electrode be 5 right, lay mode is as shown in Figure 5.
The composite-material laminates obtained to embodiment 3 carries out performance evaluation, and wherein, fiber volume fraction is 49.7%, porosity is 0.8%, glass transition temperature is 114 DEG C, curing degree is 98.5%, bending strength is 750MPa, interlaminar shear strength is 40MPa.
embodiment 4
The fabric that carbon fiber mixes with glass fibre/bisphenol A-type E44 epoxy resin composite material from hot briquetting.
Technique describes: under 25 DEG C of conditions, carries out conventional cleaning, then be coated with DL-T01 releasing agent to vacuum bag encapsulating mould 1; Then by orthogonal laying lay continuous-filament woven fabric, to complete after fabric by vacuum pump evacuation 2min, then exit, repeat extraction gas 15 times; Ready resin is entered in carbon fibers/fiberglass hybrid ply, after resin has poured in the auxiliary lower perfusion of vacuum 0.07MPa; Start-up routine control temperature modulator 5, low-voltage modulator 4, be then warming up to 120 DEG C with the speed of 0.5 DEG C/s, keeps 60min at 120 DEG C, and disconnected power down source, naturally cools to room temperature, the demoulding, obtain qualified composite-material laminates afterwards.
The diethyl tetramethyl imidazoles of 12 weight portions, the trihydroxy methyl glycidol ether of 10 weight portions is added in the bisphenol A-type E44 epoxy resin of described 100 weight portions.Described bisphenol A-type E44 epoxy resin is that Hunan Yueyang Ba Ling petrochemical industry Co., Ltd produces.
Pave line carbon fibers/fiberglass hybrid fabric laying number be 20 layers, to spread positive and negative copper foil electrode be 10 right, lay mode is as shown in Figure 5.
The composite-material laminates obtained to embodiment 4 carries out performance evaluation, and wherein, fiber volume fraction is 50%, porosity is 0.5%, glass transition temperature is 95 DEG C, curing degree is 99%, bending strength is 700MPa, interlaminar shear strength is 60MPa.
Claims (8)
1. adopt liquid molding process to carry out a system of processing for carbon fibre reinforced composite, it is characterized in that: this system include vacuum bag encapsulating mould (1), vavuum pump (8), filling resin container (6), programed temperature modulator (5), low pressure modulator (4), temperature sensor (3), positive and negative foil electrode group (2), vacuumize conduit (71) and resin duct (73);
Vacuumize conduit (71) to be connected with vavuum pump (8) by the first tube connector (81), and the first tube connector (81) is provided with the second valve (82);
Resin duct (73) is connected with the container (6) of filling resin by the second tube connector (61), and the second tube connector (61) is provided with the first valve (62);
Temperature sensor (3) is connected with programed temperature modulator (5), positive and negative foil electrode group (2) is connected with low pressure modulator (4), and programed temperature modulator (5) is connected with low pressure modulator (4);
Continuous-filament woven fabric is laid in vacuum bag encapsulating mould (1);
This system is the laying of carrying out continuous-filament woven fabric in vacuum bag encapsulating mould (1), when lay down fibre fabric process, is spread by positive and negative foil electrode (2) at the two ends of continuous-filament woven fabric; Then place resin duct (73) in the one end of the fabric completed, the other end is placed and is vacuumized conduit (71);
In order to measure the temperature of fabric heating, temperature sensor (3) is inserted with in the fabric completed, temperature sensor (3) is connected with programed temperature modulator (5), and programed temperature modulator (5) is according to the real time temperature K of temperature sensor (3) Real-time Collection
in real timewith design temperature K
settingcompare, as real time temperature K
in real timehigher than design temperature K
settingtime, output voltage signal U
into low pressure modulator (4), low pressure modulator (4) is stopped positive and negative foil electrode power output;
In order to the heating temperature profile set according to programed temperature modulator (5) carries out the output power of low pressure modulator (4), after system of processing is ready to complete, programed temperature modulator (5) first exports starting voltage signal D
intrigger low-voltage modulator (4) enters duty;
The power of low pressure modulator (4) output is that voltage is no more than 50V and electric current is no more than 300A;
Programed temperature modulator (5) is on the one hand for receiving the real time temperature K of temperature sensor (3)
in real time, the real time temperature K will received on the other hand
in real timewith design temperature K
threshold valuerelatively, if K
in real time>=K
threshold valuetime, do not export triggering signal U
in; If K
in real time< K
threshold value, export triggering signal U
into low pressure modulator (4); Described heating rate comprises first paragraph heating rate and second segment heating rate; First paragraph heating rate is 0.4 ~ 0.6 DEG C/s, and second segment heating rate is 0.3 ~ 0.5 DEG C/s; By design temperature K
threshold valueheating rate control export voltage and current;
Apply the controllable carbon fiber that described system of processing carries out and include the following step from heating:
Step one: conducting fibre fabric cuts out preparation;
Conducting fibre fabric is the carbon back continuous-filament woven fabric with conductive capability;
Step 2: vacuum bag pressure method mould prepares;
Mold cleaning, clears up smooth by mould inner surface, then with analyzing the cleaning of pure grade acetone, after acetone volatilization, obtain the mould of surfacing cleaning;
Step 3: priming by vacuum resin raw material is prepared;
The catalyst of the curing agent of 0 ~ 20 weight portion, the diluent of 0 ~ 20 weight portion, the promoter of 0 ~ 3 weight portion, the initator of 0 ~ 4 weight portion and 0 ~ 10 weight portion is added in the base resin of 100 weight portions; Then be uniformly mixed under temperature is 20 ~ 200 DEG C of conditions, then under vacuum pressure is 0.05 ~ 0.09MPa, vacuumize process 10 ~ 60min after, obtain priming by vacuum resin raw material;
Base resin is thermosetting resin or thermoplastic resin;
Thermosetting resin is epoxy resin, unsaturated polyester resin or cyanate ester resin;
Thermoplastic resin is polyurethane, nylon or cyclic polyester;
Step 4: fabric and positive and negative foil electrode laying;
Mould after step 2 process carries out lay down fibre fabric according to fabric ply sequence, and foil electrode is set according to positive and negative foil electrode lay mode;
Step 5: vacuumize while perfusion resin;
Open vavuum pump, vacuumize 1 ~ 2min, then exit, repeat to vacuumize venting 5 ~ 20 times;
Open resin raw material perfusion valve, by-pass valve control flow velocity;
Perfusion resin under the condition vacuumizing 0.05 ~ 0.09MPa;
Step 6: load the preparation that low-voltage and high-current carries out heating fibre reinforced composites product certainly;
Opening program control temperature modulator, after low-voltage modulator, the voltage being no more than 50V exported from described low-voltage modulator and the current load being no more than 300A, on positive and negative foil electrode, being conducted electricity by continuous-filament woven fabric, reaching fiber from being heating and curing resin; The temperature that the voltage and current be carried on positive and negative foil electrode can make continuous fiber produce is 45 DEG C ~ 200 DEG C.
2. employing liquid molding process according to claim 1 carries out the system of processing of carbon fibre reinforced composite, it is characterized in that: conducting fibre fabric is carbon fibre fabric, graphite fiber fabric, carbon nano-tube fibre fabric or composite fibre fabric.
3. employing liquid molding process according to claim 2 carries out the system of processing of carbon fibre reinforced composite, it is characterized in that: composite fibre fabric is the fabric that carbon fiber that carbon fiber accounts for 1 ~ 99% weight portion mixes with graphite fibre.
4. employing liquid molding process according to claim 2 carries out the system of processing of carbon fibre reinforced composite, it is characterized in that: composite fibre fabric is the fabric that carbon fiber that carbon fiber accounts for 1 ~ 99% weight portion mixes with carbon nano-tube fibre.
5. employing liquid molding process according to claim 2 carries out the system of processing of carbon fibre reinforced composite, it is characterized in that: composite fibre fabric is the fabric that carbon fiber that carbon fiber accounts for 1 ~ 99% weight portion mixes with glass fibre.
6. employing liquid molding process according to claim 1 carries out the system of processing of carbon fibre reinforced composite, it is characterized in that: positive and negative foil electrode group is laid in the two ends of continuous-filament woven fabric relatively, the mode of positive and negative foil electrode group lay has same layer lay and/or interval lay.
7. employing liquid molding process according to claim 1 carries out the system of processing of carbon fibre reinforced composite, it is characterized in that: positive and negative foil electrode group selects gold-foil electrode, silver foil electrode, copper foil electrode or foil electrode; Or positive and negative foil electrode group selects the gold, silver of grid, copper or aluminium electrode; Electrode is long is designated as A
electrode, be widely designated as B
electrode, height is designated as C
electrode, C
electrode=0.1mm, A
electrode=10B
electrode~ 20B
electrode, A
electrodeequal B
product, B
productwide for obtained carbon fibre reinforced composite.
8. employing liquid molding process according to claim 1 carries out the system of processing of carbon fibre reinforced composite, it is characterized in that: the radical of required positive and negative foil electrode (2) is relevant to the number of plies additionally arranging fabric; If the number of plies of fabric is designated as n, the radical of required positive and negative foil electrode (2) is designated as D, then D=α × n, α are electrode loading coefficient, and α=0.3 ~ 0.5,
ρ represents the volume density of fiber, ρ
facerepresent the surface density of fabric, V
frepresent the volume fraction of fibre reinforced composites, C
finished productrepresent the thickness of fibre reinforced composites.
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| IT201600093472A1 (en) * | 2016-09-16 | 2018-03-16 | Afros Spa | METHOD AND INFUSION APPARATUS FOR THE PRODUCTION OF REINFORCED COMPOSITE MATERIAL BODIES |
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| CN109367057B (en) * | 2018-12-07 | 2024-01-26 | 中南大学 | Composite material curing device |
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| CN111546739B (en) * | 2020-05-29 | 2021-07-13 | 北京大学 | Laminated heat-conducting composite material and preparation method thereof |
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| CN114004126B (en) * | 2021-11-05 | 2023-06-09 | 上海索辰信息科技股份有限公司 | Grid density optimization simulation analysis method for composite material layering |
| CN117261291A (en) * | 2023-09-25 | 2023-12-22 | 山东中恒景新碳纤维科技发展有限公司 | Carbon fiber self-heating resin curing method |
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