CN103991225A - Curing method of three-dimensional interval conjoined fabric reinforced resin-based composite material and microwave oven for curing - Google Patents
Curing method of three-dimensional interval conjoined fabric reinforced resin-based composite material and microwave oven for curing Download PDFInfo
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- CN103991225A CN103991225A CN201410187547.7A CN201410187547A CN103991225A CN 103991225 A CN103991225 A CN 103991225A CN 201410187547 A CN201410187547 A CN 201410187547A CN 103991225 A CN103991225 A CN 103991225A
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- fabric
- disjunctor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/80—Apparatus for specific applications
Abstract
The invention discloses a curing method of a three-dimensional interval conjoined fabric reinforced resin-based composite material and an adopted microwave oven. The curing method comprises the steps: firstly, preparing a preformed body; then impregnating the preformed body with a resin adhesive solution mixed with a wave-absorbing additive; inserting high-thermal-conductivity wave-transparent ceramic strips coated with a release agent into the preformed body; fixing the preformed body on a mold, and mounting on turnover brackets in the microwave oven, introducing nitrogen gas or inert gas into the microwave oven, and maintaining an appropriate pressure; starting the microwave oven, uniformly heating the preformed body in the microwave oven, and under the action of the nitrogen gas or the inert gas ejected from gas nipples, allowing impellers to drive the whole brackets to flip, so as to achieve uniform distribution and curing of the resin in the preformed body; and ultimately preparing a composite material part. The curing method simultaneously adopts five measures of a regular polygonal section, keeping of composite material component rotation and intermittent flipping, magnetron intermittent heating, various heating-up speeds and uniform internally-arranged high-thermal-conductivity elements for cooperative control, so as to ensure uniform curing of the component.
Description
Technical field
The present invention relates to three-dimensional interval disjunctor fabric and strengthen the processing method of resin composite material member and the micro-wave oven matching, the present invention is applied to the resin-based compound material component that machining 3 D interval disjunctor fabric strengthens.
Background technology
Lightweight is the important trend of composite development, and conventional light composite material mostly is honeycomb sandwich structure and foam sandwich construction, and these sandwich structure composite materials have good high-strength light characteristic, have obtained a large amount of application.But conventional interlayer structural composite material is all to adopt the mode of glueing joint by compound to covering and core, therefore normal surface layer and the de-glutinous problem of core of occurring in use procedure, particularly under damp and hot and ultra-violet radiation environment, easily cause its strength and stiffness to decline. three-dimensional interval disjunctor Fabric composites (is referred to as sandwich structure (3-d sandwich structure) abroad, three-dimensional hollow fabric) be a kind of novel sandwich composite material for weaving, it strengthens base material is three-dimensional woven integral hollow fabric, to utilize special three-dimensional woven technique, fiber is coupled to thickness direction and there is fibre-reinforced unique fabric, be that the fiber panel of fabric and core interweave and be bound up, panel and core fiber are integrated connection, hollow fabric directly forms three-dimension integrally hollow structure after resin compounded.
Integral hollow composite has four large advantages compared with conventional interlayer material: (1) panel and sandwich layer one-shot forming, weaving efficiency is high.(2) overcome traditional sandwich material as honeycomb, the easy layering of woven foam sandwich composite material, not impact-resistant weakness.(3) laminboard layer space can be for arranging built-in fitting, monitoring that probe, optical fiber, wire etc. provide space.(4) material has good insulation, heat-proof quality.The scope of application of this kind of material is more and more wider at present, can replace legacy cellular sandwich structure composite material in a lot of industries.But still there are some problems in this kind of composite element process of manufacture.Such as, due to the panel (hair side) of integral hollow composite in recombination process because the effect of gravity makes resin leakage more serious, the resin-phase of assembling is to less, stretching and the lateral compression performance of material are to a certain degree affected, how to improve resin system, the thixotropy that strengthens resin system, making hair side assemble more resin will be a problem demanding prompt solution.In addition, when the disjunctor fabric reinforced composite member of the three-dimensional interval of conventional method manufacture, the stem stem of member is not easy to be kept upright, thereby affects the mechanical property of composite element; When three-dimensional interval disjunctor fabric reinforced composite member thickness is thicker, traditional hot stove efficiency of heating surface is lower, and the length that expends time in heats inhomogeneously, causes solidifying inhomogeneous.
summary of the invention
Technical problem to be solved by this invention is to provide a kind of curing of three-dimensional interval disjunctor fabric enhancing polymer matrix composites of novelty, the method with heating using microwave the curing composite material preformed body being kept in motion, has improved the quality and performance of composite material prefabricated component under high pressure nitrogen or inert gas environment.In addition, the present invention also provides the special microwave oven that composite material preformed body is kept in motion easily.
A kind of three-dimensional interval of the present invention disjunctor fabric strengthens the curing of polymer matrix composites, and it comprises the following steps:
1) according to the three-dimensional interval disjunctor fabric of suitable size cutting and surface layer glass fabric, and make surface layer glass fabric stick to the upper and lower both sides of disjunctor fabric, three-dimensional interval, form preform.Three-dimensional interval disjunctor fabric comprises the contour wave transparent fiber of glass fibre, basalt fibre or aramid fiber.
2) weigh the weight of preform, prepare the resin adhesive liquid of corresponding weight, realize the dipping of resin adhesive liquid to preform by impregnation technology; Impregnation technology comprises that hand is stuck with paste technique or vacuum aided becomes technique or collaborative hand paste, the vacuum aided of using to become technique to realize.
3) in the saturating preform of dipping, insert the high heat conduction wave transparent pottery bar that scribbles releasing agent, the high heat conduction wave transparent pottery upper and lower surface of bar and the surface layer up and down of fabric keep in touch; The stem stem that ensures the fabric after impregnating resin can also be upright preferably under pressure environment, and the temperature difference can reduce three-dimensional hollow fabric upper and lower panel and solidify time.
4) preform is fixed on mould, and is arranged in micro-wave oven on turnover support, pass into nitrogen or inert gas and keep suitable pressure after micro-wave oven was taken out to vacuum.
5) start micro-wave oven preform is wherein carried out to homogeneous heating.
6) after having heated, open relief valve and discharge tank body internal pressure, the preform being cured is shifted out to micro-wave oven outer cooling, preparation completes.
The present invention adopts cured resin under microwave environment, shorten hardening time, add the effect of turnover bracket, change the one-way flow of resin under Action of Gravity Field, alleviated that upper surface panel lacks that resin presents hair side and lower surface panel is rich in the phenomenon that resin presents light face.Heating using microwave is to heat inside and outside composite element simultaneously, and this characteristic can evenly be solidified composite element, and easily height heats the large thickness product of the very difficult heating of traditional hot stove quick-actingly.
In step 2) prepare in resin adhesive liquid process, in glue, add weight and be the high ripple rate additive of inhaling of low-density of 0.5-2% of weight resin to improve the heating properties of microwave to resin, and guarantee that by ultrasonic vibration additive is evenly distributed in resin, carry out degassed to resin more afterwards.As preferred material, the high suction of described low-density ripple rate additive is carbon fiber or the graphite fibre grinding.
Add the high ripple rate additive of inhaling of low-density and can play following effect:
1. increase the coupling of microwave and composite, improve the utilization rate of microwave power, can realize and use less power just can heat quickly composite, thereby realize the shortening of heat time and the saving of energy.
2. what add is fiber grain (shorter fiber), such as carbon fiber, not only increases microwave absorbability, and increases hardly the situation of product weight, obviously improves the mechanical property of product, as tensile strength, and compressive strength, bending strength.
3. owing to having added fiber grain, shorten hardening time, further reduced the trend that resin flows downward because of Action of Gravity Field.
4. the material of three-dimensional hollow fabric, conventional is the non-alkalinity fireglass of high wave at present, but can be also aramid fiber, basalt fibre, waits other fibers, inhales ripple particle as long as the fibrous composite of high wave just can add.
Step 3) in high heat conduction wave transparent pottery bar be aluminium oxide ceramics bar or aluminium nitride ceramics bar, the front end of ceramic component is made target seeker, seamed edge needs rounding to prevent from cutting off fiber.
Add heat conducting element and can play following effect:
1. owing to there is heat conducting element, the uniformity of heating using microwave is improved, the mechanical property of product also improves.
2. insert after heat conducting element, due to the support of pillar, make the stem stem orthostatic of fabric good, the quality of orthostatic has a strong impact on the mechanical property of composite product, in the time that the stem stem of fabric is higher, it is necessary improving stem stem orthostatic by special method, while solidifying under the use environment of conventional heating, existing people takes other method to improve stem stem orthostatic, but effect does not have the present invention good, in addition, under conventional heating environment, can not insert heat conducting element, because can affect convection heat transfer' heat-transfer by convection.
3. inserting heat conducting element can solidify fabric enhancing resin composite materials under higher pressure, when higher to mechanical property requirements when particularly product is worked, the extra laminate of lay on the composite that need to strengthen at three-dimensional disjunctor fabric, if what now adopt is that traditional heating mode is solidified, they can not be solidified simultaneously, because if solidify simultaneously, the stem stem of fabric can be pressed because of Action of Gravity Field, and orthostatic is certainly bad.Therefore, if want to improve the stem stem orthostatic of thing, three-dimensional disjunctor textile resins composite in the middle of generally need to first solidifying, then distinguish lay laminate at its upper and lower faces, finally solidify again, but more time-consuming so in two steps, can not under too large pressure environment, solidify, so strengthen at present the application of resin composite materials with the disjunctor fabric of extra panel layer less than high-pressure curing under conventional heating environment.And under heating using microwave environment, add heat conducting element, just can realize co-curing in the composite of three-dimensional disjunctor fabric enhancing and the additional layer plywood of lay, save the production time like this. the more important thing is and add after heat conducting element, whole product can under high pressure solidify, can make like this bond strength of binder course of extra panel laying and three-dimensional disjunctor fabric better, be not easy layering, thereby cause the mechanical property of whole product better.
In step 4), the air pressure of micro-wave oven is not less than 0.1MPa.
Step 5) heating process in make intermittently upset of support, realize resin in the distribution of preform and solidify evenly.
In step 5) in microwave-oven-heating process, magnetron in guarantee micro-wave oven is worked off and on according to the temperature time curve of setting, temperature time curve be included in heat up the heating period at least adopt two kinds of different heating rates to heat, starting stage heats with higher speed, heats with lower heating rate in second stage.
In addition, the present invention also provides a kind of micro-wave oven that strengthens polymer matrix composites for the manufacture of three-dimensional interval disjunctor fabric, it is characterized in that, described micro-wave oven comprises the housing being surrounded by die cavity wall, in housing, be provided with a rotating shaft, rotating disk is installed on rotating shaft, on rotating disk, be symmetrical arranged two supports, two support upper supports the mold fixed plate for installation mold, mould is used for installing three-dimensional interval disjunctor fabric and strengthens polymer matrix composites preform, the gudgeon of mold fixed plate both sides extends support, and impeller is installed respectively on extended gudgeon, the position of corresponding impeller is provided with the valve for spraying into nitrogen or inert gas at the die cavity wall of housing.
Under the nitrogen or inert gas effect of valve ejection, impeller drives whole support to overturn, and impeller can have various ways, as long as can the upset of driven mold fixed head just can under the effect of gas.Whole turnover bracket is arranged on the rotating disk of rotation, and in the time of microwave-oven-heating, turnover bracket can be followed rotating disk and be rotated together.
On described support, all parts adopt that high wave transparent is high to be made than strong light material.Such as glass fiber reinforced polyester tetrafluoroethene etc.The housing of micro-wave oven is preferably regular polygon.
Beneficial effect:
1, the present invention adopts the linear adjustable microwave magnetron of power to be heating and curing and to be placed on the composite material prefabricated component on the lightweight mould being kept in motion with intermittence, multiple heating rate mode under high-pressure inert gas environment, has improved the quality and performance of member.
2, the present invention can moulding high-performance, good stability of the dimension, three-dimensional interval disjunctor fabric that geometric accuracy is high strengthen resin-based compound material component, has shortened the time compared with traditional heat cure composite element technique, has reduced energy consumption.
3, the present invention has adopted and has added the orthostatic that high wave transparent, high heat-conducting ceramic keep three-dimensional interval disjunctor fabric stem stem, improve the curing uniformity of composite element, finally improved the mechanical property of three-dimensional interval disjunctor fabric reinforced composites.
4, the present invention manufactures three-dimensional interval disjunctor fabric reinforced composites under the closed environment with certain pressure, compared with manufacturing three-dimensional interval disjunctor fabric reinforced composites under conventional atmospheric pressure environments, knitting reinforced composite product delamination resistance with the three-dimensional interval disjunctor fiber of extra panel can be better, product is more closely knit, the high compact and the strong mechanical performance that have kept solidification of hot-press tank composite element to have, solved the easy problem that produces a large amount of pores and affect the mechanical properties of microwave curing composite element under atmospheric pressure environment.
5, the present invention adopts equilateral polygon section, the rotation of maintenance composite element and intermittently upset, magnetron intermittent-heating, multiple heating rate, these the five kinds of measures of high-termal conductivity element to carry out the temperature homogeneity of the three-dimensional interval of Collaborative Control disjunctor fabric reinforced composites component inside simultaneously, ensures that the even of member solidifies.
Brief description of the drawings
Fig. 1 is regular polygon cavity resonator structure schematic diagram of the present invention; 1 die cavity wall in figure, 2 rotating shafts, 3 rotating disks, 4 supports, 5 mold fixed plates, 6 impellers, 7 valves.
Fig. 2 is the three-dimensional interval disjunctor fabric reinforced composites schematic diagram that the present invention processes; 11 extra panels in figure, 12 three-dimensional interval disjunctor fabrics, 13 extra panels, 14 heat conduction support components.
Detailed description of the invention
As shown in Figure 1, the micro-wave oven for the manufacture of three-dimensional interval disjunctor fabric enhancing polymer matrix composites in the present invention, comprises the housing being surrounded by die cavity wall 1, and housing is equilateral polygon section.In housing, be provided with a rotating shaft 2, rotating disk 3 is installed on rotating shaft, on rotating disk 3, be symmetrical arranged two supports 4, two support 4 upper supports the mold fixed plate 5 for installation mold, mould is used for installing three-dimensional interval disjunctor fabric and strengthens polymer matrix composites preform, the gudgeon of mold fixed plate 5 both sides extends support 4, and on extended gudgeon, impeller 6 is installed respectively, and the position of corresponding impeller is provided with the valve 7 for spraying into nitrogen or inert gas at the die cavity wall 1 of housing.
Curing of the present invention comprises the following steps:
1) according to suitable size cutting glass three-dimensional interval disjunctor fabric 12 and glass fabric 11,13 for surface layer, and 12 Shang Xia both sides to make surface layer glass fabric 11,13 stick to glass three-dimensional interval disjunctor fabric, formation preform;
2) weight of weighing glass fibre preform body, prepare the resin adhesive liquid of corresponding weight, in preparation resin adhesive liquid process, in glue, adding weight is the carbon fiber grinding of the 0.5-2% of weight resin, and guarantee that by ultrasonic vibration additive is evenly distributed in resin, carry out degassed to resin more afterwards.Again, realize the dipping of resin adhesive liquid to preform by impregnation technology;
3) in the saturating preform of dipping, insert the high heat conduction wave transparent pottery bar 14 that scribbles releasing agent, the high heat conduction wave transparent pottery upper and lower surface of bar 14 and the surface layer up and down of fabric keep in touch, high heat conduction wave transparent pottery bar is aluminium oxide ceramics bar or changes aluminium pottery bar, the front end of ceramic component is made target seeker, and seamed edge needs rounding to prevent from cutting off fiber.
4) preform is fixed on mould, and is arranged in micro-wave oven on turnover support, micro-wave oven was taken out to the pressure that passes into nitrogen or inert gas after vacuum and keep being not less than 0.1MPa;
5) start micro-wave oven preform is wherein carried out to homogeneous heating; In heating process, make intermittently upset of support, realize resin in the distribution of preform and solidify evenly.In microwave-oven-heating process, magnetron in guarantee micro-wave oven is worked off and on according to the temperature time curve of setting, temperature time curve be included in heat up the heating period at least adopt two kinds of different heating rates to heat, starting stage heats with higher speed, heats with lower heating rate in second stage.
6) after having heated, open relief valve and discharge tank body internal pressure, the preform being cured is shifted out to micro-wave oven outer cooling, preparation completes.
The concrete application approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvement, these improve and also should be considered as protection scope of the present invention.
Claims (10)
1. three-dimensional interval disjunctor fabric strengthens a curing for polymer matrix composites, it is characterized in that comprising the following steps:
1) according to the three-dimensional interval disjunctor fabric of suitable size cutting (12) and glass fabric (11 for surface layer, 13), and make glass fabric for surface layer (11,13) stick to the upper and lower both sides of three-dimensional interval disjunctor fabric (12), form preform;
2) weigh the weight of preform, prepare the resin adhesive liquid of corresponding weight, realize the dipping of resin adhesive liquid to preform by impregnation technology;
3) in the saturating preform of dipping, insert the high heat conduction wave transparent pottery bar that scribbles releasing agent, the high heat conduction wave transparent pottery upper and lower surface of bar and the surface layer up and down of fabric keep in touch;
4) preform is fixed on mould, and is arranged on the interior turnover support of micro-wave oven, after micro-wave oven is evacuated, pass into nitrogen or inert gas and keep suitable pressure;
5) start micro-wave oven preform is wherein carried out to homogeneous heating;
6) after having heated, open relief valve and discharge tank body internal pressure, the preform being cured is shifted out to micro-wave oven outer cooling, preparation completes.
2. three-dimensional interval according to claim 1 disjunctor fabric strengthens the curing of polymer matrix composites, it is characterized in that, in step 2) prepare in resin adhesive liquid process, in glue, adding weight is the high ripple rate additive of inhaling of low-density and high-strength of the 0.5-2% of weight resin, and guarantee that by ultrasonic vibration additive is evenly distributed in resin, carry out degassed to resin more afterwards.
3. three-dimensional interval according to claim 2 disjunctor fabric strengthens the curing of polymer matrix composites, it is characterized in that, the high suction of described low-density and high-strength ripple rate additive is carbon fiber or the graphite fibre grinding.
4. strengthen the curing of polymer matrix composites according to the three-dimensional interval disjunctor fabric described in claim 1,2 or 3, it is characterized in that, step 3) in high heat conduction wave transparent pottery bar be aluminium oxide ceramics bar or aluminium nitride ceramics bar, the front end of ceramic component is made target seeker, and seamed edge needs rounding to prevent from cutting off fiber.
5. the curing that strengthens polymer matrix composites according to the three-dimensional interval disjunctor fabric described in claim 1,2 or 3, is characterized in that, in step 4), the air pressure of micro-wave oven is not less than 0.1MPa.
6. the curing that strengthens polymer matrix composites according to the three-dimensional interval disjunctor fabric described in claim 1,2 or 3, is characterized in that step 5) heating process in make intermittently upset of support, realize resin in the distribution of preform and solidify evenly.
7. strengthen the curing of polymer matrix composites according to the three-dimensional interval disjunctor fabric described in claim 1,2 or 3, it is characterized in that, in described step 5) in microwave-oven-heating process, magnetron in guarantee micro-wave oven is worked off and on according to the temperature time curve of setting, temperature time curve be included in heat up the heating period at least adopt two kinds of different heating rates to heat, starting stage heats with higher speed, heats with lower heating rate in second stage.
8. one kind strengthens the micro-wave oven of polymer matrix composites for the manufacture of three-dimensional interval disjunctor fabric, it is characterized in that, described micro-wave oven comprises the housing being surrounded by die cavity wall (1), in housing, be provided with a rotating shaft (2), rotating disk (3) is installed on rotating shaft, on rotating disk (3), be symmetrical arranged two supports (4), two supports (4) upper support the mold fixed plate (5) for installation mold, mould is used for installing three-dimensional interval disjunctor fabric and strengthens polymer matrix composites preform, the gudgeon of mold fixed plate (5) both sides extends support (4), and impeller (6) is installed respectively on extended gudgeon, the position of corresponding impeller is provided with the valve (7) for spraying into nitrogen or inert gas at the die cavity wall (1) of housing.
9. according to claim 8ly strengthen the micro-wave oven of polymer matrix composites for the manufacture of three-dimensional interval disjunctor fabric, it is characterized in that, on described support, all parts adopt that high wave transparent is high to be made than strong light material.
According to claim 8 or claim 9 strengthen the micro-wave oven of polymer matrix composites for the manufacture of three-dimensional interval disjunctor fabric, it is characterized in that, the housing of micro-wave oven is regular polygon.
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| CN201410187547.7A CN103991225B (en) | 2014-05-06 | 2014-05-06 | The curing of three dimensional separation disjunctor reinforced resin based composites and the micro-wave oven of solidification |
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| CN201410187547.7A CN103991225B (en) | 2014-05-06 | 2014-05-06 | The curing of three dimensional separation disjunctor reinforced resin based composites and the micro-wave oven of solidification |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191629A (en) * | 2014-09-16 | 2014-12-10 | 新誉集团有限公司 | Forming method for rapid glass fiber reinforced resin |
| CN106976192A (en) * | 2017-03-21 | 2017-07-25 | 江苏肯帝亚木业有限公司 | The preparation technology of wood fibre heat modification wood plastic composite equipment and Wood-plastic material |
| CN107225302A (en) * | 2016-03-25 | 2017-10-03 | 无锡天芯互联科技有限公司 | A kind of Hot-blast Heating platform |
| CN109367058A (en) * | 2018-12-07 | 2019-02-22 | 中南大学 | A kind of automatic control microwave heating solidification equipment of carbon fibre composite |
| CN109483905A (en) * | 2018-07-13 | 2019-03-19 | 中国航空工业集团公司济南特种结构研究所 | A kind of adjustable solidification bracket |
| CN111216377A (en) * | 2020-01-17 | 2020-06-02 | 中南大学 | Forming method of composite material structural member |
| CN116714281A (en) * | 2023-08-09 | 2023-09-08 | 上海骐杰碳素材料有限公司 | Curing method of preform |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104191629A (en) * | 2014-09-16 | 2014-12-10 | 新誉集团有限公司 | Forming method for rapid glass fiber reinforced resin |
| CN107225302A (en) * | 2016-03-25 | 2017-10-03 | 无锡天芯互联科技有限公司 | A kind of Hot-blast Heating platform |
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| CN109367058A (en) * | 2018-12-07 | 2019-02-22 | 中南大学 | A kind of automatic control microwave heating solidification equipment of carbon fibre composite |
| CN109367058B (en) * | 2018-12-07 | 2024-01-26 | 中南大学 | Automatic control microwave heating and curing device for carbon fiber composite material |
| CN111216377A (en) * | 2020-01-17 | 2020-06-02 | 中南大学 | Forming method of composite material structural member |
| CN111216377B (en) * | 2020-01-17 | 2021-06-25 | 中南大学 | Forming method of composite material structural member |
| CN116714281A (en) * | 2023-08-09 | 2023-09-08 | 上海骐杰碳素材料有限公司 | Curing method of preform |
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| CN103991225B (en) | 2016-04-27 |
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Inventor after: Yuan Tiejun Inventor after: Zhou Laishui Inventor after: Zheng Weifeng Inventor after: Tan Changbai Inventor after: An Luling Inventor after: Jiang Qilin Inventor after: Xu Yongkun Inventor after: Zhang Guishu Inventor before: Yuan Tiejun Inventor before: Zhou Laishui Inventor before: Zheng Weifeng Inventor before: Tan Changbai Inventor before: An Luling Inventor before: Jiang Qilin Inventor before: Xu Yongkun Inventor before: Zhang Guishu |
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