CN104708834A - RTM technology for carbon fiber automobile parts - Google Patents
RTM technology for carbon fiber automobile parts Download PDFInfo
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- CN104708834A CN104708834A CN201310719483.6A CN201310719483A CN104708834A CN 104708834 A CN104708834 A CN 104708834A CN 201310719483 A CN201310719483 A CN 201310719483A CN 104708834 A CN104708834 A CN 104708834A
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Abstract
The invention discloses an RTM technology for carbon fiber automobile parts. The technology includes existing high pressure RTM process steps, which are characterized by: placing a well preformed carbon cloth in the cavity of a die according to point positions and then conducting die assembly; slighting lifting the die by about 1mm, starting a vacuum pump and conducting pumping for 1min to pumping the air in the die cavity clean; performing die assembly again, metering a three-component epoxy resin system according to the proportion, mixing them evenly at a mixing head, and then injecting the mixture into the die cavity under high pressure, with the injection pressures being 120bar/120bar and 130bar respectively, the resin pouring time being 14s, the total pouring amount being 280g, the epoxy resin being 220.5g, the epoxy resin curing agent being 57.3g, the internal releasing agent being 2.2g; and at the same time conducting pressurization on the die by a die holder and maintaining the pressure for 300s, and carrying out die release after epoxy resin curing.
Description
Technical field
The present invention relates to a kind of RTM technique of carbon fiber auto parts and components.
Background technology
Along with the development of auto industry, the quality requirements of people to automobile is more and more higher.In order to adapt to development and the consumer demand in epoch, car manufactures all over the world is also constantly being innovated, not only improve effect and the quality of auto parts and components, and various improvement is also carried out, to enhance productivity and to reduce cost-saving to some frocks and production line of producing auto parts and components.Current automotive body structure part and half hitch component or metallic article, in order to the realization of automotive light weight technology, developed country uses novel carbon fibre material to replace metal body structural member and half hitch component in the world, to reach automobile lightweight.
It is high that the carbon fiber component adopting RTM technique to make has intensity, and density is low, and dimensional stability is high, constant product quality, and surface quality advantages of higher, is widely used in Aero-Space, military domain.Just such as our hot strength of the RTM carbon fiber component that adopts Toray UT70-30 Unidirectional cloth to make can reach 1700MPa, but its density only has about 1.5g/cm3.Namely its simple tension intensity has has met or exceeded the level of high strength steel, and density but only has 1/5 of steel.Namely the application of RTM carbon fiber component product on body of a motor car significantly can reduce the weight of vehicle body, significant with minimizing motor vehicle exhaust emission to raising fuel efficiency.
Present automobile carbon fiber auto parts and components manufacture also rests on traditional RTM manufacture technics, because traditional RTM automation technolo degree is lower, molding cycle is longer, the molding time of general component was at about 30 minutes, the molding time of large product is even more than 2 hours, this molding cycle can meet Aero-Space and the lower industry requirement of other mass degree, but it is extensive to be difficult to meet automobile industry, the demand of mass production.
Summary of the invention
To be solved by this inventionly be, tradition RTM automation technolo degree is lower, molding cycle is longer, the molding time of general component was at about 30 minutes, the molding time of large product is even more than 2 hours, this molding cycle can meet Aero-Space and the lower industry requirement of other mass degree, but it is extensive to be difficult to meet automobile industry, the problem of mass production demand.
Technical problem to be solved of the present invention can be achieved through the following technical solutions:
A RTM technique for carbon fiber auto parts and components, comprises existing high pressure RTM processing step, it is characterized in that: carbon cloth good for pre-shaped is placed on matched moulds after the die cavity of mould according to a position; Mould is lifted about 1mm slightly, opens vavuum pump and take out 1min, the air in mold cavity is pumped; 3 component epoxy systems are measured by matched moulds in proportion again and high pressure injects mold cavity after mixing head place mixes; It is 14s that injection pressure is respectively 120bar/120bar and the 130bar. resin-cast time, and cast total amount is 280g, its epoxy resin 220.5g, epoxy curing agent 57.3g, inner pattern releasing agent applicable 2.2g; Simultaneously mould bases is to mould pressurizing and pressurize 300s, the demoulding after epoxy resin cure.
Wherein, described resin system is 3 component epoxy; Comprise epoxy resin, epoxy curing agent and inner pattern releasing agent applicable, being stored in volume is respectively in the batch can of 25L, 25L and 5L, and batch can is that constant temperature stores, and its storing temperature is respectively 80 DEG C, 30 DEG C and room temperature.
Wherein, described reinforcing material is carbon fiber, and its grammes per square metre is 300 grams/m.
Wherein, described mould is metal die, and mold temperature is controlled at 95 ± 2 DEG C by die heater.
Wherein, described carbon fiber is the carbon cloth that automatic cutting bed size and dimension carbon fiber being installed product of carbon fiber cuts into 475mm*265mm, and by 4 layers neat stack for subsequent use.
The invention has the beneficial effects as follows, the present invention adopts high pressure mixing and injection, and its inject time foreshortens to 14s, makes to adopt quick-setting epoxy resin.The hardening time of resin foreshortens to about 6min from original 30min, substantially reduces molding cycle, improves production efficiency.
Detailed description of the invention
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, setting forth the present invention further.
Resin system is 3 component epoxy; Comprise epoxy resin, epoxy curing agent and inner pattern releasing agent applicable, being stored in volume is respectively in the batch can of 25L, 25L and 5L.Batch can is that constant temperature stores, and its storing temperature is respectively 80 DEG C, 30 DEG C and room temperature.
Reinforcing material is carbon fiber, and its grammes per square metre is 300 grams/m.
Mould is metal die, and mold temperature is controlled at 95 ± 2 DEG C by die heater.
Other auxiliary materials and instrument comprise: external release agent, demoulding wax, dustless cloth waste, the gentle rifle of demoulding chock.
In set-up procedure:
With high pressure air rifle and rag, the foreign matter of die surface and dust etc. are cleaned out.Releasing agent uniformly sprayed or spreads upon die surface, with clean rag, unnecessary releasing agent being wiped clean after releasing agent drying, ensureing the brightness of die surface.
The rifle head of high pressure casting machine is in closed condition.3 components in resin system respectively height, at the storage tank of high pressure casting machine, circulate in pipeline and rifle head.
Cut into the carbon cloth of 475mm*265mm with automatic cutting bed size and dimension carbon fiber being installed product of carbon fiber, and by 4 layers neat stack for subsequent use.
In forming process:
Carbon cloth good for pre-shaped is placed on matched moulds after the die cavity of mould according to a position; Mould is lifted about 1mm slightly, opens vavuum pump and take out 1min, the air in mold cavity is pumped; 3 component epoxy systems are measured by matched moulds in proportion again and high pressure injects mold cavity after mixing head place mixes.It is 14s that injection pressure is respectively 120bar/120bar and the 130bar. resin-cast time, and cast total amount is 280g, its epoxy resin 220.5g, epoxy curing agent 57.3g, inner pattern releasing agent applicable 2.2g.Simultaneously mould bases is to mould pressurizing and pressurize 300s, the demoulding after epoxy resin cure.
In last handling process:
By the semi-finished product demoulding that is cured through burr removing, the operation such as milling and polishing just can obtain finished product.
The present invention adopts high pressure mixing and injection, and its inject time foreshortens to 14s, makes to adopt quick-setting epoxy resin.The hardening time of resin foreshortens to about 6min from original 30min, substantially reduces molding cycle, improves production efficiency.
Present invention employs above-mentioned technological process, high pressure RTM technology inherits all advantages of traditional RTM technique, and the automaticity overcoming traditional RTM technique is low, the technological difficulties that molding time is long.
And polyurethane resin due to its toughness better, the shock resistance of obtained product increases.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and application claims protection domain is defined by appending claims and equivalent thereof.
Claims (5)
1. a RTM technique for carbon fiber auto parts and components, comprises existing high pressure RTM processing step, it is characterized in that: carbon cloth good for pre-shaped is placed on matched moulds after the die cavity of mould according to a position; Mould is lifted about 1mm slightly, opens vavuum pump and take out 1min, the air in mold cavity is pumped; 3 component epoxy systems are measured by matched moulds in proportion again and high pressure injects mold cavity after mixing head place mixes; It is 14s that injection pressure is respectively 120bar/120bar and the 130bar. resin-cast time, and cast total amount is 280g, its epoxy resin 220.5g, epoxy curing agent 57.3g, inner pattern releasing agent applicable 2.2g; Simultaneously mould bases is to mould pressurizing and pressurize 300s, the demoulding after epoxy resin cure.
2. the RTM technique of a kind of carbon fiber auto parts and components according to claim 1, is characterized in that: described resin system is 3 component epoxy; Comprise epoxy resin, epoxy curing agent and inner pattern releasing agent applicable, being stored in volume is respectively in the batch can of 25L, 25L and 5L, and batch can is that constant temperature stores, and its storing temperature is respectively 80 DEG C, 30 DEG C and room temperature.
3. the RTM technique of a kind of carbon fiber auto parts and components according to claim 1, it is characterized in that: described reinforcing material is carbon fiber, its grammes per square metre is 300 grams/m.
4. the RTM technique of a kind of carbon fiber auto parts and components according to claim 1, is characterized in that: described mould is metal die, and mold temperature is controlled at 95 ± 2 DEG C by die heater.
5. the RTM technique of a kind of carbon fiber auto parts and components according to claim 1, it is characterized in that: described carbon fiber is the carbon cloth that automatic cutting bed size and dimension carbon fiber being installed product of carbon fiber cuts into 475mm*265mm, and by 4 layers neat stack for subsequent use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310719483.6A CN104708834A (en) | 2013-12-17 | 2013-12-17 | RTM technology for carbon fiber automobile parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310719483.6A CN104708834A (en) | 2013-12-17 | 2013-12-17 | RTM technology for carbon fiber automobile parts |
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| Publication Number | Publication Date |
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| CN104708834A true CN104708834A (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310719483.6A Pending CN104708834A (en) | 2013-12-17 | 2013-12-17 | RTM technology for carbon fiber automobile parts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109910327A (en) * | 2019-03-05 | 2019-06-21 | 福建海源新材料科技有限公司 | A kind of HP-RTM moulding process of carbon fiber product |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792619A (en) * | 2005-12-31 | 2006-06-28 | 北京玻钢院复合材料有限公司 | Method for mfg. covering unit of composite material for vehicle |
| CN102350800A (en) * | 2011-07-20 | 2012-02-15 | 江苏兆鋆新材料科技有限公司 | HP-RTM technology based method for molding automobile surface external decorative parts |
| CN102407884A (en) * | 2011-09-20 | 2012-04-11 | 奇瑞汽车股份有限公司 | Automobile body part and production method thereof |
| CN103213289A (en) * | 2013-04-16 | 2013-07-24 | 江苏奥新新能源汽车有限公司 | Molding technology for composite material product |
-
2013
- 2013-12-17 CN CN201310719483.6A patent/CN104708834A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792619A (en) * | 2005-12-31 | 2006-06-28 | 北京玻钢院复合材料有限公司 | Method for mfg. covering unit of composite material for vehicle |
| CN102350800A (en) * | 2011-07-20 | 2012-02-15 | 江苏兆鋆新材料科技有限公司 | HP-RTM technology based method for molding automobile surface external decorative parts |
| CN102407884A (en) * | 2011-09-20 | 2012-04-11 | 奇瑞汽车股份有限公司 | Automobile body part and production method thereof |
| CN103213289A (en) * | 2013-04-16 | 2013-07-24 | 江苏奥新新能源汽车有限公司 | Molding technology for composite material product |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109910327A (en) * | 2019-03-05 | 2019-06-21 | 福建海源新材料科技有限公司 | A kind of HP-RTM moulding process of carbon fiber product |
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| C06 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information |
Address after: 315033 Changxin Road, Jiangbei District, Zhejiang, China, No. 525, No. Applicant after: NINGBO HUAXIANG AUTOMOBILE FIBER RESEARCH AND DEVELOPMENT CO., LTD. Address before: 315033 Changxin Road, Jiangbei District, Zhejiang, China, No. 525, No. Applicant before: Xiang auto parts and components research and development Co., Ltd of Ningbo China |
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| COR | Change of bibliographic data | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150617 |
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| RJ01 | Rejection of invention patent application after publication |