CN103991225B - The curing of three dimensional separation disjunctor reinforced resin based composites and the micro-wave oven of solidification - Google Patents
The curing of three dimensional separation disjunctor reinforced resin based composites and the micro-wave oven of solidification Download PDFInfo
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- CN103991225B CN103991225B CN201410187547.7A CN201410187547A CN103991225B CN 103991225 B CN103991225 B CN 103991225B CN 201410187547 A CN201410187547 A CN 201410187547A CN 103991225 B CN103991225 B CN 103991225B
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- preform
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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 kind of curing of three dimensional separation disjunctor reinforced resin based composites and the micro-wave oven of employing, curing: first make preform; Dipping is mixed with the resin adhesive liquid of inhaling ripple additive again; The high heat conduction wave transparent pottery bar scribbling releasing agent is inserted in preform; Preform is fixed on mould, and is arranged in micro-wave oven on turnover support, micro-wave oven passed into nitrogen or inert gas and keep suitable pressure; Start micro-wave oven and carry out homogeneous heating to preform wherein, under the nitrogen or inert gas effect of valve ejection, impeller drives whole support to overturn, and realizes resin in the distribution of preform and solidification evenly; Finally prepare composite product.The present invention adopts equilateral polygon section simultaneously, keep composite element to rotate and interval upset, magnetron intermittent-heating, multiple heating rate, these the five kinds of measures of even built-in high-termal conductivity element carry out Collaborative Control, guarantee component uniform curing.
Description
Technical field
The processing method that the present invention relates to three dimensional separation disjunctor reinforced resin composite element and the micro-wave oven matched, 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, obtain a large amount of application.But conventional sandwich structure composite is all adopt the mode of glueing joint by covering and core compound, therefore normal generation surface layer and the de-glutinous problem of core in use procedure, particularly its strength and stiffness are easily caused to decline under damp and hot and ultra-violet radiation environment. three dimensional separation disjunctor Fabric composites (is referred to as sandwich structure (3-dsandwichstructure) 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, utilize special three-dimensional woven technique, fiber is coupled to thickness direction and there is fibre-reinforced unique fabric, namely the fiber panel of fabric and core interweave and are 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 materials: (1) panel and sandwich layer one-shot forming, weaving efficiency is high.(2) traditional sandwich material is overcome as honeycomb, the easy layering of woven foam sandwich composite material, not impact-resistant weakness.(3) laminboard layer space can for arranging built-in fitting, monitoring that probe, optical fiber, wire etc. provide space.(4) material has excellent insulation, heat-proof quality.The scope of application of this kind of material is more and more wider at present, in large number of rows already through replacing legacy cellular sandwich structure composite material.But in manufacture this kind of composite element process, still there are some problems.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 assembled is to less, to a certain degree have impact on stretching and the lateral compression performance of material, how to improve resin system, strengthen the thixotropy of resin system, making hair side assemble more resin will be a problem demanding prompt solution.In addition, during conventional method manufacture three dimensional separation disjunctor fabric reinforced composite component, the stem stem of component is not easy to be kept upright, thus affects the mechanical property of composite element; When three dimensional separation disjunctor fabric reinforced composite component thickness is thicker, traditional hot stove efficiency of heating surface is lower, and expend time in length, heats uneven, causes solidification uneven.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of curing of three dimensional separation disjunctor reinforced resin based composites of novelty, the method also solidifies the composite material preformed body be kept in motion under high pressure nitrogen or inert gas environment with heating using microwave, improve the quality and performance of composite material prefabricated component.In addition, present invention also offers the special microwave oven that composite material preformed body is kept in motion easily.
The curing of a kind of three dimensional separation disjunctor reinforced resin based composites of the present invention, it comprises the following steps:
1) according to suitable size cutting three dimensional separation disjunctor fabric and surface layer glass fabric, and make surface layer glass fabric stick to the upper and lower both sides of three dimensional separation disjunctor fabric, form preform.Three dimensional separation 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 hand and sticks with paste technique or vacuum aided and become technique or collaboratively use that hand is stuck with paste, vacuum aided becomes technique to realize.
3) in the preform that dipping is saturating, insert the high heat conduction wave transparent pottery bar scribbling 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; Ensure that the stem stem of the fabric after impregnating resin preferably uprightly, and can also can reduce temperature difference when three-dimensional hollow fabric upper and lower panel solidifies under pressure environment.
4) preform is fixed on mould, and is arranged in micro-wave oven on turnover support, pass into nitrogen or inert gas after micro-wave oven being pumped through vacuum and keep suitable pressure.
5) start micro-wave oven and homogeneous heating is carried out to preform wherein.
6), after having heated, open pressure in relief valve release tank body, the preform be cured is shifted out micro-wave oven and cools outward, preparation completes.
The present invention adopts cured resin under microwave environment, shorten hardening time, add the effect of turnover bracket, change resin one-way flow under gravity, alleviate that upper surface panel lacks that resin presents hair side and lower surface panel is rich in the phenomenon that resin presents light face.Simultaneously heating using microwave heat inside and outside composite element, and this characteristic makes composite element can be uniform curing, and can the light high heavy thickness product that heat traditional hot stove quick-actingly and be difficult to heat.
In step 2) prepare in resin adhesive liquid process, in glue, add weight is that the low-density height suction ripple rate additive of the 0.5-2% of weight resin is to improve the heating properties of microwave to resin, and guarantee that additive is evenly distributed in resin by ultrasonic vibration, carry out degassed to resin more afterwards.As preferred material, it is the carbon fiber or graphite fibre that grind that described low-density height inhales ripple rate additive.
Add low-density height suction ripple rate additive and can play following effect:
1. increase being coupled of microwave and composite, improve the utilization rate of microwave power, the less power of use can be realized and just can heat composite quickly, thus realize the shortening of heat time and the saving of energy.
2. what add is fiber grain (shorter fiber), and such as carbon fiber, not only increases microwave absorbability, and increases the situation of part weight hardly, obviously improves the mechanical property of product, as tensile strength, and compressive strength, bending strength.
3. owing to the addition of fiber grain, shorten hardening time, further reduce the trend that resin flows downward because of Action of Gravity Field.
4. the material of three-dimensional hollow fabric, at present conventional is the non-alkalinity fireglass of high wave, but also can be aramid fiber, and basalt fibre, waits other fibers, as long as the fibrous composite of high wave just can add suction ripple particle.
Step 3) in high heat conduction wave transparent pottery bar be aluminium oxide ceramics bar or aluminium nitride ceramics bar, target seeker is made in the front end of ceramic component, and 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, and the mechanical property of product also improves.
2. after inserting 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, when the stem stem of fabric is higher, it is necessary for improving stem stem orthostatic by special method, with when solidifying under the 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 convection heat transfer' heat-transfer by convection, heat conducting element can not be inserted under conventional heating environment, because can be affected.
3. inserting heat conducting element makes reinforced resin composite to solidify at a higher pressure, time higher to mechanical property requirements when particularly product works, need the laminate that lay is extra on the composite of three-dimensional disjunctor fabric enhancing, if what now adopt is traditional heating mode solidification, 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 the stem stem orthostatic improving thing, generally need first to solidify middle three-dimensional disjunctor textile resins composite, then at its upper and lower faces lay laminate respectively, finally solidify again, but so more time-consuming in two steps, can not solidify under too large pressure environment, thus at present not under conventional heating environment high-pressure curing with the application of the disjunctor reinforced resin composite of additional panel layer.And under heating using microwave environment, add heat conducting element, co-curing while just can be implemented in the composite of three-dimensional disjunctor fabric enhancing and the additional layer plywood of lay, such saving production time. the more important thing is after adding heat conducting element, whole product can under high pressure solidify, the bond strength of the binder course of additional panel laying and three-dimensional disjunctor fabric can be made so better, be not easy layering, thus 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 the upset of support interval, realize resin in the distribution of preform and solidification evenly.
In step 5) in microwave-oven-heating process, ensure that the magnetron in micro-wave oven works 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, present invention also offers a kind of micro-wave oven for the manufacture of three dimensional separation disjunctor reinforced resin based composites, it is characterized in that, described micro-wave oven comprises the housing surrounded by die cavity wall, a rotating shaft is provided with in housing, rotating shaft installs rotating disk, rotating disk is symmetrical arranged two supports, two supports carry the mold fixed plate for installation mold, mould is used to installation three dimensional separation disjunctor reinforced resin based composites preform, the gudgeon of mold fixed plate both sides extends support, and respectively impeller is installed on the gudgeon extended, 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 can just can under the effect of gas.Whole turnover bracket is arranged on the rotating disk of rotation, and when 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 polytetrafluoroethylene etc.The housing of micro-wave oven is preferably regular polygon.
Beneficial effect:
1, the present invention adopts the composite material prefabricated component that the linear adjustable microwave magnetron of power is heating and curing on the light weight molds that is placed on and is kept in motion with interval, multiple heating rate mode under high-pressure inert gas environment, improves the quality and performance of component.
2, the present invention can shaping high-performance, good stability of the dimension, three dimensional separation disjunctor fiber reinforced resin based composite material component that geometric accuracy is high, shortens the time, decrease energy ezpenditure compared with traditional heat cure composite element technique.
3, present invention employs the high wave transparent of interpolation, high heat-conducting ceramic to keep the orthostatic of three dimensional separation disjunctor fabric stem stem, improve the uniformity of composite element solidification, finally improve the mechanical property of three dimensional separation disjunctor fabric reinforced composites.
4, the present invention manufactures three dimensional separation disjunctor fabric reinforced composites under the closed environment with certain pressure, with manufacture compared with three dimensional separation disjunctor fabric reinforced composites under the atmospheric pressure environments of routine, reinforced composite product delamination resistance knitted by three dimensional separation disjunctor fiber with additional panel can be better, product is more closely knit, maintain highly dense solid and strong mechanical performance that solidification of hot-press tank composite element has, under solving atmospheric pressure environment, microwave curing composite element easily produces a large amount of pore and the problem affected the mechanical properties.
5, the present invention adopts equilateral polygon section simultaneously, keeps composite element to rotate and interval upset, these the five kinds of measures of magnetron intermittent-heating, multiple heating rate, high-termal conductivity element carry out the temperature homogeneity of Collaborative Control three dimensional separation disjunctor fabric reinforced composites component inside, guarantee component uniform curing.
Accompanying drawing explanation
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 separation disjunctor fabric reinforced composites schematic diagram that the present invention processes; 11 additional panel in figure, 12 three dimensional separation disjunctor fabrics, 13 additional panel, 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 separation disjunctor reinforced resin based composites in the present invention, comprises the housing surrounded by die cavity wall 1, and housing is equilateral polygon section.A rotating shaft 2 is provided with in housing, rotating shaft is installed rotating disk 3, rotating disk 3 is symmetrical arranged two supports 4, two supports 4 carry the mold fixed plate 5 for installation mold, mould is used to installation three dimensional separation disjunctor reinforced resin based composites preform, the gudgeon of mold fixed plate 5 both sides extends support 4, and installs impeller 6 respectively on the gudgeon extended, 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 surface layer glass fabric 11,13, and make surface layer glass fabric 11,13 stick to disjunctor fabric about 12 both sides, glass three-dimensional interval, form preform;
2) weight of glass fibre preform body is weighed, prepare the resin adhesive liquid of corresponding weight, in preparation resin adhesive liquid process, the carbon fiber ground that weight is the 0.5-2% of weight resin is added in glue, and guarantee that additive is evenly distributed in resin by ultrasonic vibration, carry out degassed to resin more afterwards.Again, realize the dipping of resin adhesive liquid to preform by impregnation technology;
3) in the preform that dipping is saturating, insert the high heat conduction wave transparent pottery bar 14 scribbling 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, target seeker is made in the front end of ceramic component, 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, pass into nitrogen or inert gas after micro-wave oven being pumped through vacuum and keep being not less than the pressure of 0.1MPa;
5) start micro-wave oven and homogeneous heating is carried out to preform wherein; Make the upset of support interval in heating process, realize resin in the distribution of preform and solidification evenly.In microwave-oven-heating process, ensure that the magnetron in micro-wave oven works 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 pressure in relief valve release tank body, the preform be cured is shifted out micro-wave oven and cools outward, preparation completes.
Embody rule 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 improvement also should be considered as protection scope of the present invention.
Claims (7)
1. a curing for three dimensional separation disjunctor reinforced resin based composites, is characterized in that comprising the following steps:
1) according to suitable size cutting three dimensional separation disjunctor fabric (12) and surface layer glass fabric (11,13), and make surface layer glass fabric (11,13) stick to three dimensional separation disjunctor fabric (12) both sides up and down, 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 preform that dipping is saturating, insert the high heat conduction wave transparent pottery bar scribbling 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 in micro-wave oven on turnover support, pass into nitrogen or inert gas after being evacuated by micro-wave oven and keep suitable pressure;
5) start micro-wave oven and homogeneous heating is carried out to preform wherein;
6), after having heated, open pressure in relief valve release tank body, the preform be cured is shifted out micro-wave oven and cools outward, preparation completes.
2. the curing of three dimensional separation disjunctor reinforced resin based composites according to claim 1, it is characterized in that, in step 2) prepare in resin adhesive liquid process, the low-density and high-strength height suction ripple rate additive that weight is the 0.5-2% of weight resin is added in glue, and guarantee that additive is evenly distributed in resin by ultrasonic vibration, carry out degassed to resin more afterwards.
3. the curing of three dimensional separation disjunctor reinforced resin based composites according to claim 2, is characterized in that, it is the carbon fiber or graphite fibre that grind that described low-density and high-strength height inhales ripple rate additive.
4. the curing of the three dimensional separation disjunctor reinforced resin based composites according to 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, target seeker is made in the front end of ceramic component, and seamed edge needs rounding to prevent from cutting off fiber.
5. the curing of the three dimensional separation disjunctor reinforced resin based composites according to claim 1,2 or 3, it is characterized in that, in step 4), the air pressure of micro-wave oven is not less than 0.1MPa.
6. the curing of the three dimensional separation disjunctor reinforced resin based composites according to claim 1,2 or 3, is characterized in that, step 5) heating process in make the upset of support interval, realize resin in the distribution of preform and solidification evenly.
7. the curing of the three dimensional separation disjunctor reinforced resin based composites according to claim 1,2 or 3, it is characterized in that, in described step 5) in microwave-oven-heating process, ensure that the magnetron in micro-wave oven works 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.
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Cited By (1)
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| CN109366869A (en) * | 2018-12-05 | 2019-02-22 | 万文杰 | A kind of convertible function rack device of injecting products mold production |
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| CN106976192B (en) * | 2017-03-21 | 2023-04-18 | 江苏肯帝亚木业有限公司 | Wood fiber thermal modification wood-plastic composite material equipment and preparation process of wood-plastic composite material |
| CN109483905B (en) * | 2018-07-13 | 2020-10-20 | 中国航空工业集团公司济南特种结构研究所 | Adjustable curing support |
| CN109367058B (en) * | 2018-12-07 | 2024-01-26 | 中南大学 | Automatic control microwave heating and curing device for carbon fiber composite material |
| 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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| US5466917A (en) * | 1991-06-05 | 1995-11-14 | Kabushiki Kaisha Kouransha | Microwave-absorptive heat-generating body and method for forming a heat-generating layer in a microwave-absorptive heat-generating body |
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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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