CN101143492A - Compression type RTM forming method - Google Patents
Compression type RTM forming method Download PDFInfo
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- CN101143492A CN101143492A CNA2007100779951A CN200710077995A CN101143492A CN 101143492 A CN101143492 A CN 101143492A CN A2007100779951 A CNA2007100779951 A CN A2007100779951A CN 200710077995 A CN200710077995 A CN 200710077995A CN 101143492 A CN101143492 A CN 101143492A
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Abstract
The invention discloses a compression type RTM forming method, belonging to a resin matrix fiber composite material mobile molding forming method; aiming at providing an RTM forming method with higher fiber content and uniform fiber infiltration. The method comprises the following steps: laying fiber fabric or fiber prefabricated bodies in a compressible mold cavity, closing the mold and sealing the mold cavity, filling resin into the mold cavity, exhausting air and residual glue, compressing the mold cavity to reach a preset size under the pressure maintaining condition, exhausting partial resin, maintaining the pressure, curing and demolding. The invention can obviously improve the fiber content of the formed part, greatly improve the comprehensive mechanical property of the formed part, and has the advantages of smooth and flat surface of the part and the like; can be widely used in a plurality of fields such as ships, automobiles, sports, aerospace and the like.
Description
Technical field: the present invention relates to a kind of resin-based fibrous composite forming method, relate in particular to a kind of RTM forming method.
Background technology: since the sixties in last century, along with the continuous development of manufacture technology of composite material, composite has all obtained in each fields of military and civilian such as communications and transportation, boats and ships, Aero-Space and physical culture using widely with its excellent comprehensive performance; Aircraft girder of making such as the fiberglass yacht that adopts the galss fiber reinforced resin composite to make, carbon fiber-reinforced resin composite materials or aerofoil, Kafra fiber strengthen the helmet that resin composite materials makes or aircraft target ship etc.
In resin-based fibrous composite manufacturing technology, general commonly used moulding process mainly contains: hand stick with paste contact moudling, injection molding, pultrusion, Wrapping formed, vacuum bag is molded, autoclave molding, the RTM method of forming etc.Because the technological progress in fields such as material, equipment; the RTM method of forming is few because of its equipment investment, product complexity height, intensity designability are good, high comprehensive performance and advantage such as can accomplish scale production; be able to fast development in the later stage eighties in last century, the existing Aero-Space manufacturing industry that has been widely used in.
RTM is the english abbreviation that resin moves molding, is injection molding technique again; It is to utilize pressure resin injection to be entered in the die cavity of the close die of having filled fabric or fiber preform, again through curing, the demoulding and the composite element that forms.Since in the die cavity of close die need according to Intensity Design require fiberfill fibers fabric or fiber preform, the resin that therefore injects die cavity needs lower viscosity and good fiber wetness, and the fiber content in the die cavity also should appropriateness; Utilize Synthesis principle such as injection pressure (also having the mould of employing to assist in advance vacuumizes) and capillarity, make between the fiber of resin in being filled near closed hollow ring and to flow and impregnation of fibers fabric or fiber preform, eliminating bubble, make resin solidification, the demoulding then under certain condition, thereby obtain the resin-based fiber composite component of anticipated shape.
Because the mechanical property of resin-based fibrous composite is mainly by reinforcing material---fabric or fiber preform provide, and mainly play a part to cohere and work in coordination with as the resin of matrix material; Therefore, generally speaking, the content of fiber in composite is high more, the comprehensive mechanical property of composite is also just good more.At present, adopt the resulting resin-based fiber composite component of traditional RTM forming method, its fiber content can only reach 35～45% usually, can not satisfy the requirement of strong mechanical performance member; If will improve the fiber content in the member, then can be full of die cavity fully owing to too high fiber content hinders resin again, fiber is difficult to be difficult for fully discharging by resin dipping, gas fully, make component inside be easy to generate defectives such as pore, starved, layering, scrap thereby cause composite element to descend because of combination property is serious.Therefore, how to improve the problem that fiber content in the RTM moulding process just becomes present industry joint research.
Summary of the invention: at the above-mentioned defective that exists in the prior art, the present invention aims to provide that a kind of fiber content is higher, resin soaks into uniform compression type RTM forming method.
To achieve these goals, the present invention adopts the technical scheme of following steps:
1) lay fibre reinforced materials in compressible mold cavity;
2) matched moulds, closed mould die cavity;
3) in mold cavity, fill with resin;
4) the compression mould die cavity reaches preliminary dimension, and discharges unnecessary resin;
5) pressurize, curing, the demoulding.
In technique scheme, for the ease of the resin injection moulding, in step 2) and 3) between can also increase the operation that together mold cavity is vacuumized.
In above-mentioned each technical scheme, described fibre reinforced materials can be a fabric, also can be the precast body made from fiber.The die cavity of mould can have: 1. mold cavity is a compression chamber; 2. the half module of mould or core are inflatable; 3. mould half module is multiple structures such as compressible film, bag.
Compared with the prior art, the present invention is owing to adopted the compressible mould of cavity dimension, and under the state that this die cavity does not compress, volume is bigger, finish resin injection and fiber and soak into, and this moment, the fiber content in the mold cavity was relatively low, realized easily that therefore resin injection, fiber soak into and exhaust; After treating that mold cavity is finished resin injection, fiber infiltration, exhaust, under the pressurize situation, mold cavity is compressed to predetermined volume, squeezes the part resin in the die cavity, thereby make the fiber in the mold cavity reach higher volume content, so also just correspondingly improved the fiber content of institute's forming part.
Description of drawings:
State diagram when Fig. 1 is a matched moulds of the present invention;
Fig. 2 is the state diagram of the present invention when filling with resin in mold cavity;
State diagram when Fig. 3 is a compression mould die cavity of the present invention;
Fig. 4 is the Workpiece structure schematic diagram that adopts made of the present invention;
State diagram when Fig. 5 is the another embodiment of the present invention matched moulds;
Fig. 6 is the state diagram of another embodiment of the present invention when filling with resin in mold cavity;
State diagram when Fig. 7 is another embodiment of the present invention compression mould die cavity;
Fig. 8 is the Workpiece structure schematic diagram of another embodiment of the present invention made.
Among the figure: injection port 1 patrix 2 overfalls 3 sealing rings 4 mold cavities 5 fibre reinforced materials 6 counterdies 7 blocking cap 8 forming parts, 9 half modules or core rods 10
The specific embodiment: the invention will be further described below in conjunction with accompanying drawing and specific embodiment:
Embodiment 1
As shown in Figure 1, the manufacturing process of part is as follows:
1) routinely method lay down fibre reinforcing material 6 in mold cavity 5;
2) matched moulds, and adopt the sealing ring 4 be located between patrix 2, the counterdie 7 border seal with mold cavity 5;
3) method is routinely filled with mold cavity 5 with resin from the injection port 1 that is located on the patrix 2; Simultaneously, opening the overfall 3 be located on the patrix 2 makes gas in the mold cavity 5 or unnecessary resin fully discharge from this overfall;
4) with blocking cap 8 closed injection mouths 1, apply a downward pressure P then patrix 2 is moved down, reach preliminary dimension up to mold cavity 5 compressions; In this process, fibre reinforced materials 6 is by patrix 2, counterdie 7 compactings, because the volume of mold cavity 5 is compressed reduces, the part resin is discharged from by overfall 3 in this die cavity simultaneously;
5) keep this pressure a period of time, treat the demoulding behind the resin solidification in the mold cavity 5; Method is routinely removed overlap, the burr of part 9 then, can obtain the higher resin-based fiber composite component of fiber content.
Part also can adopt mode as shown in Figure 2 to make, and detailed process is as follows:
Step 1), 2), 3) identical with embodiment 1;
4) with blocking cap 8 closed injection mouths 1, the half module or the core rod 10 that adopt silica gel or rubber elastomeric material to make are expanded, reach preliminary dimension up to mold cavity 5 compressions; In this process, fibre reinforced materials 6 is by half module or core rod 10, patrix 2 compactings, because the volume of mold cavity 5 is compressed reduces, unnecessary resin is discharged from by overfall 3 in this die cavity simultaneously;
Step 5) is identical with embodiment 1.
In the various embodiments described above, fibre reinforced materials 6 can be a fabric, also can be the precast body made from fiber.For the ease of the resin injection moulding, in the step 3) and 4 of the various embodiments described above) between can also increase the operation that together mold cavity is vacuumized.
In the above-described embodiments, the technological parameters such as volume compression ratio of the time of the speed of size, the compression mould die cavity 5 of P, pressurize, die cavity 5 are relevant with situations such as the distribution density of the kind of the version of part and complexity, resin, fibre reinforced materials 6 and material and temperature, humidity usually owing to exert pressure, therefore described technological parameter changes, and the characteristic that they can self be had according to the resin of selecting for use, fibre reinforced materials 6 is also determined by concrete technological experiment in conjunction with the design feature of part.
Below be to adopt the present invention full composite material load-carrying member of making (external form is that curved thin plate, cross section are oblong) and the ratio that this member of common RTM fabrication techniques is done to test data (arithmetic mean of instantaneous value):
| Sample | Fiber content w% | 0 ° of hot strength (MPa) | 0 ° of tensile modulus of elasticity (GPa) | 0 ° of interlayer shear strong (MPa) |
| The common RTM method of forming | 48.3 | 170 | 21.6 | 15.4 |
| The compression type RTM forming method | 72.9 | 326 | 36.7 | 24.8 |
In the table:
(1) " sample " is the standard specimen of the component inside intercepting after solidify fully.
(2) 0 ° of hot strengths, tensiles modulus of elasticity (GB1447-83) carry out by " Test method for tensile properties of glass fiberreinforced plastics ", and sample is an I type sample.
(3) 0 ° of interlaminar shear strengths (GB1450.1-83) carry out by " Test method for interlaminar shear strength of glass fiberreinforced plastics ".
(4) resin content (GB2577-89) carries out by " Test method for resin content of glass fiber reinforced plastics ".
(5) reinforcing fiber materials is unidirectional alkali-free glass fibre felt of French import and EWR200-90 alkali-free glass fiber cloth; Resin material is the sharp product E POVIAAEBD of a Cray power RF-1001 closed moulding resin.
As can be seen from the above experimental data, the present invention can make the fiber content of RTM injection moulding composite element bring up to more than 72% by about 35～45%, and the comprehensive strength of composite element also is greatly improved.Because the comprehensive mechanical property of composite depends on many-sided factors such as fiber, resin, forming method and technological parameter, therefore, a kind of trend that improves with the increase of fiber content of the above-mentioned data mechanical property that only reflected this composite element behind utilization the present invention.
Claims (4)
1. compression type RTM forming method is characterized in that step is as follows:
1) lay fibre reinforced materials in compressible mold cavity;
2) matched moulds, closed mould die cavity;
3) in mold cavity, fill with resin;
4) the compression mould die cavity reaches preliminary dimension, and discharges unnecessary resin;
5) pressurize, curing, the demoulding.
2. compression type RTM forming method according to claim 1 is characterized in that step is as follows:
1) lay fibre reinforced materials in compressible mold cavity;
2) matched moulds, closed mould die cavity;
3) in mold cavity, fill with resin;
4) mold cavity is vacuumized;
5) the compression mould die cavity reaches preliminary dimension, and discharges unnecessary resin;
6) pressurize, curing, the demoulding.
3. compression type RTM forming method according to claim 1 and 2 is characterized in that: described fibre reinforced materials is a fabric.
4. compression type RTM forming method according to claim 1 and 2 is characterized in that: described fibre reinforced materials is a fiber preform.
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|---|---|---|---|
| CNA2007100779951A CN101143492A (en) | 2007-11-02 | 2007-11-02 | Compression type RTM forming method |
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| CNA2007100779951A CN101143492A (en) | 2007-11-02 | 2007-11-02 | Compression type RTM forming method |
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Cited By (24)
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| CN101491947B (en) * | 2009-01-08 | 2012-03-28 | 浙江金元亚麻有限公司 | Manufacturing process of hemp woven fabric reinforced composite material plate |
| CN102765198A (en) * | 2012-07-13 | 2012-11-07 | 中国人民解放军国防科学技术大学 | Vacuum assisted molding system of composite and molding method of composite |
| CN102972900A (en) * | 2012-11-23 | 2013-03-20 | 北京神州罗地亚工贸有限责任公司 | Mouth of combined helmet and production processes thereof |
| CN103057128A (en) * | 2012-12-25 | 2013-04-24 | 天津三爻航空航天科技发展有限公司 | Automatic heating and pressurization production process for composite material specially used for small-sized unmanned plane |
| CN103302871A (en) * | 2012-03-14 | 2013-09-18 | 西门子公司 | Method of manufacturing an article by molding |
| CN103687708A (en) * | 2011-07-21 | 2014-03-26 | 三菱重工业株式会社 | Method and device for producing at least two products including fiber-reinforced resin |
| CN103770343A (en) * | 2014-01-20 | 2014-05-07 | 宁波大成新材料股份有限公司 | Production method of high-performance fiber composite product |
| CN103847112A (en) * | 2014-02-14 | 2014-06-11 | 江苏恒神纤维材料有限公司 | RTM (resin transfer moulding) mould with resin intercepting outlet |
| CN104736312A (en) * | 2012-10-29 | 2015-06-24 | 迪芬巴赫机械工程有限公司 | Mold, control means, method and installation for producing a preferably fiber-reinforced plastic component |
| CN104884221A (en) * | 2012-10-23 | 2015-09-02 | 阿克马法国公司 | Method for manufacturing composite thermoplastic part by vacuum injection-compression-molding, device for the implementation thereof and resulting part |
| CN105328918A (en) * | 2015-12-15 | 2016-02-17 | 北京金轮沃德科技有限公司 | Helmet body forming method of fire fighting helmet |
| CN106217904A (en) * | 2016-07-20 | 2016-12-14 | 保定华翼风电叶片研究开发有限公司 | The preparation facilities of a kind of extruded bright finish uniform thickness fiberglass test flat board and method |
| CN107187081A (en) * | 2017-06-14 | 2017-09-22 | 北京汽车集团有限公司 | Prepare the method and parts of the parts with polymorphic structure |
| CN108501404A (en) * | 2018-03-28 | 2018-09-07 | 联想(北京)有限公司 | A kind of preparation method and mold of composite fibre shell |
| CN109624177A (en) * | 2018-12-28 | 2019-04-16 | 赛史品威奥（唐山）结构复合材料有限公司 | A kind of picard cargo box back bucket once through moulding technology |
| CN109689330A (en) * | 2016-11-29 | 2019-04-26 | 东和株式会社 | The manufacturing method of compression-molding apparatus, compression-molding method and compression forming product |
| CN110027227A (en) * | 2019-02-28 | 2019-07-19 | 东华大学 | Bag press-resin Transfer molding mold, molding machine and forming method |
| CN110948910A (en) * | 2019-12-11 | 2020-04-03 | 长春市佳运汽车零部件有限公司 | Multi-mold-core molding forming mold for vehicle battery bracket and forming method thereof |
| CN111788057A (en) * | 2018-03-30 | 2020-10-16 | 东丽株式会社 | Method for producing press-molded article |
| CN113211826A (en) * | 2020-01-21 | 2021-08-06 | 丰田自动车株式会社 | Method and apparatus for producing fiber-reinforced resin molded article |
| CN113910639A (en) * | 2021-10-11 | 2022-01-11 | 北京化工大学 | A flame-retardant continuous fiber reinforced composite material vacuum-assisted RTM molding device and molding method |
| US20220032495A1 (en) * | 2018-09-21 | 2022-02-03 | Woodio Oy | Method of manufacturing moulded articles |
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2007
- 2007-11-02 CN CNA2007100779951A patent/CN101143492A/en active Pending
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| CN101491947B (en) * | 2009-01-08 | 2012-03-28 | 浙江金元亚麻有限公司 | Manufacturing process of hemp woven fabric reinforced composite material plate |
| CN103687708A (en) * | 2011-07-21 | 2014-03-26 | 三菱重工业株式会社 | Method and device for producing at least two products including fiber-reinforced resin |
| CN103302871A (en) * | 2012-03-14 | 2013-09-18 | 西门子公司 | Method of manufacturing an article by molding |
| CN103302871B (en) * | 2012-03-14 | 2017-03-01 | 西门子公司 | The method that object is manufactured by mechanography |
| US9919482B2 (en) | 2012-03-14 | 2018-03-20 | Siemens Aktiengesellschaft | Mold for manufacturing a component |
| CN102765198A (en) * | 2012-07-13 | 2012-11-07 | 中国人民解放军国防科学技术大学 | Vacuum assisted molding system of composite and molding method of composite |
| CN104884221B (en) * | 2012-10-23 | 2017-06-13 | 阿克马法国公司 | Method, apparatus for carrying out the method and the resulting part of thermoplastic compound part are manufactured by vacuum injection compression molding |
| CN104884221A (en) * | 2012-10-23 | 2015-09-02 | 阿克马法国公司 | Method for manufacturing composite thermoplastic part by vacuum injection-compression-molding, device for the implementation thereof and resulting part |
| CN104736312A (en) * | 2012-10-29 | 2015-06-24 | 迪芬巴赫机械工程有限公司 | Mold, control means, method and installation for producing a preferably fiber-reinforced plastic component |
| CN102972900A (en) * | 2012-11-23 | 2013-03-20 | 北京神州罗地亚工贸有限责任公司 | Mouth of combined helmet and production processes thereof |
| CN103057128A (en) * | 2012-12-25 | 2013-04-24 | 天津三爻航空航天科技发展有限公司 | Automatic heating and pressurization production process for composite material specially used for small-sized unmanned plane |
| CN103770343B (en) * | 2014-01-20 | 2017-02-01 | 宁波大盛新材料有限公司 | Production method of high-performance fiber composite product |
| CN103770343A (en) * | 2014-01-20 | 2014-05-07 | 宁波大成新材料股份有限公司 | Production method of high-performance fiber composite product |
| CN103847112A (en) * | 2014-02-14 | 2014-06-11 | 江苏恒神纤维材料有限公司 | RTM (resin transfer moulding) mould with resin intercepting outlet |
| CN105328918A (en) * | 2015-12-15 | 2016-02-17 | 北京金轮沃德科技有限公司 | Helmet body forming method of fire fighting helmet |
| CN105328918B (en) * | 2015-12-15 | 2017-10-24 | 北京金轮沃德科技有限公司 | A kind of body formed method of helmet for fire hat |
| CN106217904A (en) * | 2016-07-20 | 2016-12-14 | 保定华翼风电叶片研究开发有限公司 | The preparation facilities of a kind of extruded bright finish uniform thickness fiberglass test flat board and method |
| CN109689330A (en) * | 2016-11-29 | 2019-04-26 | 东和株式会社 | The manufacturing method of compression-molding apparatus, compression-molding method and compression forming product |
| CN107187081A (en) * | 2017-06-14 | 2017-09-22 | 北京汽车集团有限公司 | Prepare the method and parts of the parts with polymorphic structure |
| CN107187081B (en) * | 2017-06-14 | 2019-09-06 | 北京汽车集团有限公司 | Prepare the method and components with the components of polymorphic structure |
| CN108501404A (en) * | 2018-03-28 | 2018-09-07 | 联想(北京)有限公司 | A kind of preparation method and mold of composite fibre shell |
| CN111788057B (en) * | 2018-03-30 | 2022-05-31 | 东丽株式会社 | Method for producing press-molded article |
| CN111788057A (en) * | 2018-03-30 | 2020-10-16 | 东丽株式会社 | Method for producing press-molded article |
| US20220032495A1 (en) * | 2018-09-21 | 2022-02-03 | Woodio Oy | Method of manufacturing moulded articles |
| US12059817B2 (en) * | 2018-09-21 | 2024-08-13 | Woodio Oy | Method of manufacturing moulded articles |
| CN109624177A (en) * | 2018-12-28 | 2019-04-16 | 赛史品威奥（唐山）结构复合材料有限公司 | A kind of picard cargo box back bucket once through moulding technology |
| CN111674059A (en) * | 2019-02-28 | 2020-09-18 | 东华大学 | Bag compression resin transfer molding mold, molding device, and molding method |
| CN110027227A (en) * | 2019-02-28 | 2019-07-19 | 东华大学 | Bag press-resin Transfer molding mold, molding machine and forming method |
| CN110948910A (en) * | 2019-12-11 | 2020-04-03 | 长春市佳运汽车零部件有限公司 | Multi-mold-core molding forming mold for vehicle battery bracket and forming method thereof |
| CN113211826A (en) * | 2020-01-21 | 2021-08-06 | 丰田自动车株式会社 | Method and apparatus for producing fiber-reinforced resin molded article |
| CN113211826B (en) * | 2020-01-21 | 2022-11-11 | 丰田自动车株式会社 | Manufacturing method and manufacturing apparatus of fiber-reinforced resin molded product |
| CN113910639A (en) * | 2021-10-11 | 2022-01-11 | 北京化工大学 | A flame-retardant continuous fiber reinforced composite material vacuum-assisted RTM molding device and molding method |
| CN113910639B (en) * | 2021-10-11 | 2024-03-26 | 北京化工大学 | Flame-retardant continuous fiber reinforced composite material vacuum-assisted RTM forming device and forming method |
| CN114347508A (en) * | 2021-12-31 | 2022-04-15 | 辽宁通用航空研究院 | Preparation process of carbon fiber composite material airplane longitudinal member |
| CN114347508B (en) * | 2021-12-31 | 2024-08-06 | 辽宁通用航空研究院 | Preparation process of carbon fiber composite aircraft longitudinal member |
| CN114311761A (en) * | 2022-01-05 | 2022-04-12 | 东北大学 | VARTM device and method integrating temperature, perfusion speed and pressure |
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