CN109910327A - A kind of HP-RTM moulding process of carbon fiber product - Google Patents

A kind of HP-RTM moulding process of carbon fiber product Download PDF

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Publication number
CN109910327A
CN109910327A CN201910163706.2A CN201910163706A CN109910327A CN 109910327 A CN109910327 A CN 109910327A CN 201910163706 A CN201910163706 A CN 201910163706A CN 109910327 A CN109910327 A CN 109910327A
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CN
China
Prior art keywords
carbon fiber
mold
resin
injection
fiber product
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Pending
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CN201910163706.2A
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Chinese (zh)
Inventor
李明阳
赵云宝
叶哲霏
练方伟
程国龙
薛同妹
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Fujian Haiyuan New Material Science & Technology Co Ltd
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Fujian Haiyuan New Material Science & Technology Co Ltd
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Application filed by Fujian Haiyuan New Material Science & Technology Co Ltd filed Critical Fujian Haiyuan New Material Science & Technology Co Ltd
Priority to CN201910163706.2A priority Critical patent/CN109910327A/en
Publication of CN109910327A publication Critical patent/CN109910327A/en
Pending legal-status Critical Current

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Abstract

The present invention provides a kind of HP-RTM moulding process of carbon fiber product, the moulding process step includes: that mold prepares, mold waxing or spraying release agent, laying carbon fiber product preform part, press molding, vacuum pressure maintaining, matrix resin injection, pressure maintaining solidification, product molding, thimble demoulding, cooling, deflashing.The present invention solves the problems such as traditional hand paste process shaping strength deficiency, bubble phenomenon, dry spot, improves stable product quality and reliability, shortens molding cycle, improves production efficiency.

Description

A kind of HP-RTM moulding process of carbon fiber product
[technical field]
Present invention relates particularly to a kind of HP-RTM moulding process of carbon fiber product.
[background technique]
In terms of composite material automobile manufacturing technology and research, there are larger gaps with American-European countries in China.With automobile The development of lightweight forming technique substitutes traditional sheet metal component with advanced composite material (ACM) components and is increasingly becoming one in automobile application Kind trend.Extensive concern of the composite material with excellent performance by automobile industry, wherein composite material process planning is made always For the emphasis of research, from initial hand paste process, low pressure RTM technique, pressure stochastic distribution are to current novel HP-RTM technique, often The generation and application of a new process are all the propulsions to composite molding research.Traditional hand paste process, low pressure RTM technique are being made Make small batch, there are the advantages such as device configuration is simple, manufacturing cost is low in the research and development of sample early period, therefore obtained medium-sized and small enterprises Favor.But composite material manual pasting forming process exist it is big to the dependence of operator, production efficiency is low, large labor intensity, product The disadvantages of quality stability is poor, and air pollution is serious is not suitable for applying in auto parts and components standardization, mass production.
HP-RTM technique has short molding cycle, high microsteping volume fraction as one of advanced moulding process of composite material And the advantage of advanced automation, oneself has been widely recognized in terms of the composite material manufacturing.The group of usual composite material At including matrix and reinforcing material two parts, matrix is the continuous phase in composite material, and effect is that reinforcement is fixedly arranged at one It rises and transmits load between reinforcement;Reinforcement is the main body carried in composite material, mainly have glass fibre, carbon fiber, The corpus fibrosums such as the organic fibers such as aramid fiber and asbestos fibre, whisker, wire and hard particulates, added value is highest, answers With being widely carbon fiber.The carbon fiber in composite material is broadly divided into two major classes at present: polyacrylonitrile (PAN) base carbon fibre and Wherein carbon fiber is to be moved out the elements such as the hydrogen in fiber, oxygen by high temperature cabonization to asphalt base carbon fiber, becomes one kind and contains Carbon amounts is higher than 90% pure carbon material.Since fiber has carried out axial pre-stretching processing in carbonisation, so that carbon molecules edge It is axial to carry out orientations, the axial strength of carbon fiber greatly improved, then become a kind of lightweight, high intensity, high-modulus and The high performance fibre material of stable chemical performance.
As composite material is in the popularization and application of different field, especially constantly increase in the use ratio of automotive body structure part More, people start also higher and higher to the quality requirement of composite product.There is also problems urgently to solve for HP-RTM technique Certainly, unstable including process parameter optimizing, product surface dry spot, the problems such as molding cycle is longer.
[summary of the invention]
The technical problem to be solved in the present invention is to provide a kind of HP-RTM moulding process of carbon fiber product, solve The problems such as traditional hand paste process shaping strength deficiency, bubble phenomenon, dry spot, stable product quality and reliability are improved, contracted Short molding cycle, improves production efficiency.
The present invention is implemented as follows:
A kind of HP-RTM moulding process of carbon fiber product, it is characterised in that: steps are as follows for the moulding process:
Step 1, mold prepare: HP-RTM mold material is steel, and die surface is smooth;
Step 2, mold waxing or spraying release agent: HP-RTM new die was waxed number at least 3 times or more, every 10 minutes Last wax, die surface pore need to be filled up completely, and keep finish;It is put into the molding of carbon fiber product preform part Before, spray matched exterior-applied mold lubricant corresponding to resin properties;
Step 3, laying carbon fiber product preform part: according to the requirement of product Lay up design, carbon is first processed early period Fibre preform part is molded a product, the preceding laying carbon fiber product preform in mold of molding every time Part;
Step 4, press molding: it after the laying work for completing carbon fiber product preform part, is walked into mold clamping Suddenly;
Step 5, vacuum pressure maintaining: after upper and lower mould completes closure, locking, starting vacuum pump, by the vacuum tube built in mold, It is vacuumized in progress mould, pressure maintaining program;
Step 6, matrix resin injection: before resin injection, need to preheat resin, curing agent, inner pattern releasing agent applicable, Deaeration work, after reaching set temperature value, carries out injection work;
Step 7, pressure maintaining solidification: the work of resin injection fillers is completed in the short time, then pressure maintaining solidifies;
Step 8, product molding: after reaching setting cure cycle, press upper mold is opened, and product completes solidification;
Step 9, thimble demoulding: mechanical ejection device is carried out by the thimble of the thimble hydraulic device built in mold;
Step 10, cooling, deflashing.
Further, in the step 2, it is ensured that die surface is without any dust impurities, spray before exterior-applied mold lubricant spraying At right angle, spray gun and mold holding 30cm~45cm spray distance, spraying are uniform for rifle direction and die surface.
Further, detailed process is as follows for the step 6:
Before resin injection, resin, curing agent, inner pattern releasing agent applicable are evacuated in corresponding heater respectively by pump, It is 60~80 DEG C that resin pre-heating temperature, which is set separately, and curing agent pre-heating temperature is 30~40 DEG C, inner pattern releasing agent applicable preheating temperature Degree is 25~30 DEG C, after reaching set temperature value;The weight of resin and curing agent, inner pattern releasing agent applicable is 100:25:1, will Resin, curing agent, the inner pattern releasing agent applicable of said ratio are delivered to injection pipette tips, and the note of resin, curing agent, inner pattern releasing agent applicable is set separately Injection pressure is 140bar, 144bar, 150bar, and sets resin Composition flow value as 3300g, and flow velocity 80g/s works as injection pressure After power reaches, the fluid of lower three pipelines of high pressure is collected to pipette tips, completes injection work.
Further, the step 7 specifically: in 35-45s complete resin injection fillers work, and set 160s~ The pressure maintaining curing time of 200s.
The present invention has the advantage that
1) it solves the problems such as traditional hand paste process shaping strength deficiency, bubble phenomenon, dry spot, reduces rejection rate, and Improve stable product quality and reliability.
2) moulding process amount of resin of the present invention can reduce 25% compared with hand pasting forming amount of resin, improve resin use Rate reduces material cost.
3) carbon fiber product molding cycle is shortened, production efficiency is improved.
[Detailed description of the invention]
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is moulding process flow process figure of the invention.
Fig. 2 is molding equipment structural schematic diagram of the invention.
[specific embodiment]
The present invention is further described below in conjunction with specific embodiment.
Referring in particular to Fig. 1-2, by taking the HP-RTM moulding process of carbon fiber bonnet as an example, processing step is as follows:
1) mold prepares: HP-RTM mold material is P20 steel, inside sets resin mouth position;Upper mold 1 is type core, lower mold 2 For type chamber, resin injection port is located at 1 type core middle position of upper mold;
2) mold waxing or spraying release agent: the new die of carbon fiber bonnet HP-RTM is waxed number 5 times, every 10 points Clock last time wax guarantees that die surface pore is filled up completely, keeps finish.The resin used is fast-curing epoxy resin, And the exterior-applied mold lubricant of matching corresponding thereto, before being put into the molding of carbon fiber bonnet preform part, exterior-applied mold lubricant spray It is ensured that die surface is without impurity such as any dust before applying, spray gun direction and die surface are as far as possible at right angle, spray gun and mold 30cm~45cm spray distance is kept, uniformly, after guaranteeing the injection of preform part high temperature and pressure, product can smoothly take off for spraying Mould;
3) laying carbon fiber product preformed member: according to the requirement of product Lay up design, carbon fiber engine is first processed early period Lid preform part, laying carbon fiber bonnet preform part, the region at four angles need to press in mold before molding It puts in fact completely;
4) press molds: after the laying work for completing carbon fiber bonnet preform part, it is ensured that do not have under press After staff, confirming button, into mold clamping step;
5) vacuum pressure maintaining: after upper mold 1, lower mold 2 complete closure, locking, start vacuum pump 3, by built in lower mold 2 The first vacuum tube 4, the second vacuum tube 5, third vacuum tube 6 carry out mould in vacuumize work, lower 2 edge of mold is provided with rubber Sealing joint strip 7 can play vacuum pressure maintaining effect after compaction die;
6) matrix resin is injected: before resin injection, by three group of first pump group 8 respectively by epoxy resin, curing agent, interior Release agent, which is evacuated to, to be added in corresponding hot device 9, and it is 60~80 DEG C that epoxy resin pre-heating temperature, which is set separately, curing agent pre-add Hot temperature is 30~40 DEG C, and inner pattern releasing agent applicable pre-heating temperature is 25~30 DEG C, after reaching set temperature value, corresponding resin Composition Viscosity can change, and the weight by epoxy resin and curing agent, inner pattern releasing agent applicable is 100:25:1, start three group second Epoxy resin, curing agent, inner pattern releasing agent applicable are delivered to injection pipette tips 11 by pump group 10, and epoxy resin, curing agent, interior is set separately The injection pressure of release agent is 140bar, 144bar, 150bar, in order to guarantee that resin Composition is filled up completely, it should be noted that The injection pressure of inner pattern releasing agent applicable should be greater than the injection pressure of epoxy resin, and set resin Composition flow value as 3300g, and flow velocity is 80g/s, after injection pressure reaches, the fluid of lower three pipelines of high pressure is collected to injection pipette tips 11, completes injection work;
7) pressure maintaining solidifies: completing the work of resin injection fillers in 40s or so, filled product resin Composition does not react Terminate, to set the pressure maintaining curing time of 160s~200s;
8) product molding: after reaching 160s~200s cure cycle of setting, press upper mold 1 is opened, and product is completed Solidification;
9) thimble demoulds: completing the product surface temperature after solidifying generally has 80 DEG C~100 DEG C, by built in lower mold 2 The thimble 13 of thimble hydraulic device 12 carry out mechanical ejection device, avoid being manually demolded product surface damaged;
10) cooling, deflashing: carbon fiber engine is stamped the overlap face of reserved one fixed width, after product curing molding, needs It is post-processed, product integrity demands are reached;
11) shaped article quality inspection: the hardness of product is measured, Article Stiffness Determination should meet product specification requirement, and check Each position of bonnet after judging whether product quality reaches requirement, carries out if being found region phenomena such as hickie, adipopexia occurs Post-processing.
The present invention has the advantage that
1) it solves the problems, such as traditional hand paste process shaping strength deficiency, bubble phenomenon, dry spot, reduce rejection rate, and improve Stable product quality and reliability.
2) moulding process amount of resin of the present invention can reduce 25% compared with hand pasting forming amount of resin, improve resin use Rate reduces material cost;
3) carbon fiber product molding cycle is shortened, production efficiency is improved.
Although specific embodiments of the present invention have been described above, those familiar with the art should be managed Solution, we are merely exemplary described specific embodiment, rather than for the restriction to the scope of the present invention, it is familiar with this The technical staff in field should be covered of the invention according to modification and variation equivalent made by spirit of the invention In scope of the claimed protection.

Claims (4)

1. a kind of HP-RTM moulding process of carbon fiber product, it is characterised in that: steps are as follows for the moulding process:
Step 1, mold prepare: HP-RTM mold material is steel, and die surface is smooth;
Step 2, mold waxing or spraying release agent: HP-RTM new die was waxed number at least 3 times or more, every 10 minutes upper one Secondary wax, die surface pore need to be filled up completely, and keep finish;Before being put into the molding of carbon fiber product preform part, spray Apply matched exterior-applied mold lubricant corresponding to resin properties;
Step 3, laying carbon fiber product preform part: according to the requirement of product Lay up design, carbon fiber is first processed early period Product preform part is molded a product, the preceding laying carbon fiber product preform part in mold of molding every time;
Step 4, press molding: after the laying work for completing carbon fiber product preform part, into mold clamping step;
Step 5, vacuum pressure maintaining: after upper and lower mould completes closure, locking, starting vacuum pump, by the vacuum tube built in mold, carries out It is vacuumized in mould, pressure maintaining program;
Step 6, matrix resin injection: it before resin injection, needs to preheat resin, curing agent, inner pattern releasing agent applicable, deaeration Work, after reaching set temperature value, carries out injection work;
Step 7, pressure maintaining solidification: the work of resin injection fillers is completed in the short time, then pressure maintaining solidifies;
Step 8, product molding: after reaching setting cure cycle, press upper mold is opened, and product completes solidification;
Step 9, thimble demoulding: mechanical ejection device is carried out by the thimble of the thimble hydraulic device built in mold;
Step 10, cooling, deflashing.
2. a kind of HP-RTM moulding process of carbon fiber product according to claim 1, it is characterised in that: the step 2 In, it is ensured that die surface is without any dust impurities before exterior-applied mold lubricant spraying, spray gun direction and die surface are at right angle, spray gun 30cm~45cm spray distance is kept with mold, spraying is uniform.
3. a kind of HP-RTM moulding process of carbon fiber product according to claim 1, it is characterised in that: the step 6 Detailed process is as follows:
Before resin injection, resin, curing agent, inner pattern releasing agent applicable are evacuated in corresponding heater respectively by pump, respectively Resin pre-heating temperature is set as 60~80 DEG C, curing agent pre-heating temperature is 30~40 DEG C, and inner pattern releasing agent applicable pre-heating temperature is 25~30 DEG C, after reaching set temperature value;The weight of resin and curing agent, inner pattern releasing agent applicable is 100:25:1, will be above-mentioned Resin, curing agent, the inner pattern releasing agent applicable of proportion are delivered to injection pipette tips, and the injection pressure of resin, curing agent, inner pattern releasing agent applicable is set separately Power is 140bar, 144bar, 150bar, and sets resin Composition flow value as 3300g, flow velocity 80g/s, when injection pressure reaches After arriving, the fluid of lower three pipelines of high pressure is collected to pipette tips, completes injection work.
4. a kind of HP-RTM moulding process of carbon fiber product according to claim 1, it is characterised in that: the step 7 Specifically: the work of resin injection fillers is completed in 35-45s, and sets the pressure maintaining curing time of 160s~200s.
CN201910163706.2A 2019-03-05 2019-03-05 A kind of HP-RTM moulding process of carbon fiber product Pending CN109910327A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112406133A (en) * 2020-09-22 2021-02-26 合肥兴海元能源科技有限公司 High-temperature high-pressure RTM (resin transfer molding) method for new energy automobile battery upper cover

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104708834A (en) * 2013-12-17 2015-06-17 宁波华翔汽车零部件研发有限公司 RTM technology for carbon fiber automobile parts
CN105881932A (en) * 2014-11-20 2016-08-24 北京玻钢院复合材料有限公司 Method for forming large-sized composite material box
CN106393732A (en) * 2016-11-29 2017-02-15 集美大学 Manufacturing method of yacht

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104708834A (en) * 2013-12-17 2015-06-17 宁波华翔汽车零部件研发有限公司 RTM technology for carbon fiber automobile parts
CN105881932A (en) * 2014-11-20 2016-08-24 北京玻钢院复合材料有限公司 Method for forming large-sized composite material box
CN106393732A (en) * 2016-11-29 2017-02-15 集美大学 Manufacturing method of yacht

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112406133A (en) * 2020-09-22 2021-02-26 合肥兴海元能源科技有限公司 High-temperature high-pressure RTM (resin transfer molding) method for new energy automobile battery upper cover

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Application publication date: 20190621