CN105690803B - A kind of composite Vacuum Heat expansion molding technique - Google Patents
A kind of composite Vacuum Heat expansion molding technique Download PDFInfo
- Publication number
- CN105690803B CN105690803B CN201610027401.5A CN201610027401A CN105690803B CN 105690803 B CN105690803 B CN 105690803B CN 201610027401 A CN201610027401 A CN 201610027401A CN 105690803 B CN105690803 B CN 105690803B
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- Prior art keywords
- wind pipe
- mould
- nylon wind
- precast body
- vacuum heat
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Classifications
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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
-
- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Abstract
The invention discloses a kind of composite Vacuum Heat expansion molding technique.Step is to cut prepreg fabric and expanding material core or nylon wind pipe size as requested；According to mechanics design requirement by prepreg fabric laying, it is coated on outside expanding material core or nylon wind pipe and obtains precast body；Above-mentioned precast body is put into cavity body of mould, matched moulds locking；Vacuumizing makes die cavity and precast body therein be in negative pressure state；(if nylon wind pipe, after being inflated supercharging to nylon wind pipe) carries out heating and thermal insulation to mould, maintains corresponding temperature and time according to the cure parameter of the resin contained in prepreg fabric, solidifies precast body；Mould is cooled down, elimination negative pressure of deflating returns to ambient atmosphere pressure (then unloading gas to nylon wind pipe returns to ambient atmosphere pressure simultaneously if nylon wind pipe), opens mould and takes out the composite product after shaping.Methods described can serialization be integrally formed production, low cost, environmental protection, resulting product good appearance, intensity is high.
Description
Technical field
The present invention relates to composite material process planning, more particularly to composite Vacuum Heat expansion molding technique.
Background technology
It is widely used in using composites such as carbon fibre, glasses as the product of raw material with its superior physical property each
Field, including Leisure Sport equipment, Aero-Space and commercial Application.Carbon fibre material is from fishing rod and golf club at present
It is generalized to tennis racket, racket, bicycle, winter sports equipment, Boating-used equipment etc.；It is main in terms of Aero-Space
It is used for military aircraft, commercial aircraft, unmanned plane of high-strength light requirement etc.；Commercial Application is concentrated mainly on auto parts machinery, wind
Machine, pressure vessel etc..
Existing die press technology for forming, because the gas in product is difficult to discharge in forming process, in the product after shaping
Easily there is the problems such as hole, product surface easily produces pin hole, starved, smelly head, aberration in portion, and appearance is bad, often needs
Polishing benefit soil that will be follow-up etc. improves the repair procedure of outward appearance, increases the input of human cost and the risk of environmental pollution.
The content of the invention
It is an object of the invention to provide one kind can serialization be integrally formed production, low cost, environmental protection, resulting product outward appearance
It is excellent, the high composite Vacuum Heat expansion molding technique of intensity.
To achieve the above object, the present invention provides a kind of composite Vacuum Heat expansion molding technique, it is characterised in that step
Suddenly it is,
1) prepared by precast body
A, prepreg fabric and expanding material core or nylon wind pipe size are cut according to Structural Design Requirement；
B, according to mechanics design requirement by prepreg fabric laying, it is coated on the outer of expanding material core or nylon wind pipe
Face；
2) above-mentioned precast body is put into cavity body of mould, matched moulds locking；
3) vacuumizing makes die cavity and precast body therein be in negative pressure state；
4) situation one uses expanding material core, heating and thermal insulation is carried out to mould, according to the tree contained in prepreg fabric
The cure parameter of fat maintains corresponding temperature and time, solidifies precast body；Situation two uses nylon wind pipe, and nylon wind pipe is entered
Row plenum, then heating and thermal insulation is carried out to mould, remain corresponding according to the cure parameter of the resin contained in prepreg fabric
Temperature and time, solidify precast body；
5) mould is cooled down, elimination negative pressure of deflating returns to ambient atmosphere pressure, simultaneously right if having using nylon wind pipe inflation
Nylon wind pipe unloads gas and returns to ambient atmosphere pressure, opens mould and takes out the composite product after shaping.
Further, the prepreg fabric is the multiple material prepreg of carbon fiber or the multiple material prepreg of glass fibre.
Further, 60-230 DEG C of the startup expansion temperature of the expanding material, 1-50 times of volume multiplying power before and after expansion, expansion
Caused pressure limit 0.1-20MPa afterwards.
Further, the negative pressure state in the step 3), refers to vacuum>0.1Pa；Preferably, vacuum be 1~
100KPa。
Further, mold temperature being risen to 150 DEG C by room temperature in the step 4), heating rate is 10~100 DEG C/min,
150 DEG C of 10~120min of insulation.
Further, supercharging is inflated in the step 4) to nylon wind pipe, pressure is 0.1~10MPa.
Further, the rate of temperature fall of cooling is 10~50 DEG C/min in the step 5).
Negative pressure state of the present invention, refers to vacuum>0.1Pa, 1~100KPa of preferred scope, the effect vacuumized are
The air for excluding to bring into during composite interlayer gap pre-shaped before the forming is trapped in product or moved in forming process
Product surface influences outward appearance.
The present invention excludes gas after follow-up expanding material heating expansion, the further pin hole for eliminating product surface,
The problems such as starved, smelly head, aberration, make quality of item more preferable.
60-230 DEG C of the startup expansion temperature of the expanding material, 1-50 times of volume multiplying power before and after expansion, is produced after expansion
Pressure limit 0.1-20MPa.Mould cavity space is full of after expanding material expanded by heating, pressure is produced to the multiple material of fiber, makes fibre
The multiple material Coating combination of dimension is even closer, and then improves product strength.It is swollen that expanding material is can be seen that from Fig. 1 process chart
It is swollen, it is filled with mould cavity space.
Advantage of the present invention：
1st, the technique can obtain excellent products appearance, overcome pin hole, starved, smelly head, the color of traditional handicraft product surface
The problems such as poor；
2nd, the products appearance of high quality is obtained, so as to which earth process is mended in polishing after saving, saves human input cost；Simultaneously
Reduce harm of the environmental pollution to worker, the working environment of worker is friendly, environmental protection；
3rd, the product that the moulding process obtains, internal porosity is few, and intensity is higher, good appearance；
4th, compared with traditional interior inflation air pressure forming, yields is greatly improved, achievable serialization is integrally formed life
Production；
5th, the resin glue of traditional HP-RTM techniques is that the method entered using injection needs high pressure, and equipment is extremely expensive,
The technique of the present invention can save the input of expensive device.
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.Embodiment
In unreceipted particular technique or condition person, according to the technology described by document in the art or condition or according to the description of product
Book is carried out.Agents useful for same or the unreceipted production firm person of instrument, being can be by the conventional products of acquisition purchased in market.
With reference to Fig. 1 process chart, implement following examples, wherein 1 is mold, 2 be lower mould, and 3 be sealing ring,
4 be prepreg fabric, and 5 be expanding material or nylon wind pipe.
Embodiment 1：
It is to prepare precast body first, is illustrated with the sample in Fig. 1, the multiple material prepreg of fiber is cut according to Structural Design Requirement
Fabric and EPS (expandable polystyrene, expanded polystyrene (EPS)) core (core is prefabricated into according to product mould) chi
It is very little, fiber is answered by material prepreg fabric laying according to mechanics design requirement, the outside of EPS cores is coated on, according to mould pre-shaped
Be put into well, in lower cavity body of mould, closed die locking ensure sealing ring effect form good air-tightness, then to die cavity with
And precast body therein carries out being evacuated to 50KPa, mold temperature is risen to 150 DEG C by room temperature, heating rate is 50 DEG C/min,
150 DEG C of insulation 20min, now EPS starts to expand as temperature raises produces pressure, is combined so as to improve composite interlayer
Power, resin are fully cured, and are then cooled down, and rate of temperature fall is 50 DEG C/min, are down to room temperature, and deflation returns to ambient air
Pressure, open mould and take out product, the perfect sunken bubble-free of product surface.
Embodiment 2：
It is that carbon fibre initial rinse is cut according to labyrinth design requirement first by taking the fine multiple material product of the carbon of labyrinth as an example
Expect fabric and EVA (ethylene-vinylacetatecopolymer, ethylene-vinyl acetate copolymer) core (according to product
Mould is prefabricated into core) size, carbon fiber prepreg fabric is interlocked laying according to mechanics design requirement, is coated on EVA cores
Outside, product is put into die cavity well according to mold cavity shapes pre-shaped and locks, then die cavity and precast body therein are taken out
Mold temperature is risen to 150 DEG C, heating rate is 10 DEG C/min, and 150 DEG C are incubated 10min, now by vacuum to 1KPa by room temperature
EVA starts expansion as temperature raises and produces pressure, and so as to improve composite interlayer adhesion, resin is fully cured, then
Cooled down, rate of temperature fall is 50 DEG C/min, is down to room temperature, and deflation returns to ambient atmosphere pressure, opens mould and takes out product, system
The perfect sunken bubble-free in product surface.
Embodiment 3：
It is that carbon fibre initial rinse is cut according to labyrinth design requirement first by taking the fine multiple material product of the carbon of labyrinth as an example
Expect fabric and EPS cores (core is prefabricated into according to product mould) size, knitted carbon fiber prepreg according to mechanics design requirement
Thing interlocks laying, is coated on the outside of EPS cores, and product is put into die cavity well according to mold cavity shapes pre-shaped and locked, then will be whole
Mould and precast body therein are placed in vacuum bag, carry out being evacuated to 100KPa, and mold temperature is risen into 150 by room temperature
DEG C, heating rate is 100 DEG C/min, 150 DEG C of insulation 20min, and now EPS starts to expand as temperature raises produces pressure, from
And composite interlayer adhesion is improved, resin is fully cured, and is then cooled down, and rate of temperature fall is 10 DEG C/min, is down to room
Temperature, deflation return to ambient atmosphere pressure, open mould and take out product, the perfect sunken bubble-free of product surface.
Embodiment 4：
It is that carbon fibre initial rinse is cut according to labyrinth design requirement first by taking the fine multiple material product of the carbon of labyrinth as an example
Material fabric and high-energy rubber (come that green wood of taking pride in) core (core is prefabricated into according to product mould) size, according to mechanics design requirement
Carbon fiber prepreg fabric is interlocked laying, is coated on the outside of high-energy rubber core, product is put into well according to mold cavity shapes pre-shaped
Die cavity is simultaneously locked, and then die cavity and precast body therein is carried out being evacuated to 0.5KPa, and mold temperature is risen to by room temperature
150 DEG C, heating rate is 50 DEG C/min, 150 DEG C of insulation 120min, and now high-energy rubber starts to expand as temperature raises produces pressure
Power, so as to improve composite interlayer adhesion, resin is fully cured, then cooled down, and rate of temperature fall is 50 DEG C/min, drop
To room temperature, deflation returns to ambient atmosphere pressure, opens mould and takes out product, the perfect sunken bubble-free of product surface.
Embodiment 5：
It is that carbon fibre initial rinse is cut according to labyrinth design requirement first by taking the fine multiple material product of the carbon of labyrinth as an example
Expect fabric and nylon wind pipe size, carbon fiber prepreg fabric is interlocked laying according to mechanics design requirement, is coated on nylon wind
The outside of pipe, product are put into die cavity well according to mold cavity shapes pre-shaped and locked, and then die cavity and precast body therein are carried out
0.5KPa is evacuated to, nylon wind pipe is inflated and is pressurized to 1MPa, mold temperature is risen to 150 DEG C by room temperature, heating speed
Rate is 50 DEG C/min, 150 DEG C of insulation 120min, and now high-energy rubber starts to expand as temperature raises produces pressure, so as to improve
Composite interlayer adhesion, resin are fully cured, then cooled down, and rate of temperature fall is 50 DEG C/min, is down to room temperature, puts
Gas, gas is unloaded to nylon wind pipe and returns to ambient atmosphere pressure, opened mould and take out product, the perfect sunken bubble-free of product surface.
Embodiment 6：
It is that carbon fibre initial rinse is cut according to labyrinth design requirement first by taking the fine multiple material product of the carbon of labyrinth as an example
Expect fabric and nylon wind pipe size, carbon fiber prepreg fabric is interlocked laying according to mechanics design requirement, is coated on nylon wind
The outside of pipe, product are put into die cavity well according to mold cavity shapes pre-shaped and locked, and then die cavity and precast body therein are carried out
0.5KPa is evacuated to, nylon wind pipe is inflated and is pressurized to 0.1MPa, mold temperature is risen to 150 DEG C by room temperature, heating
Speed is 80 DEG C/min, 150 DEG C of insulation 80min, and now high-energy rubber starts to expand as temperature raises produces pressure, so as to improve
Composite interlayer adhesion, resin are fully cured, then cooled down, and rate of temperature fall is 50 DEG C/min, is down to room temperature, puts
Gas, gas is unloaded to nylon wind pipe and returns to ambient atmosphere pressure, opened mould and take out product, the perfect sunken bubble-free of product surface.
Embodiment 7：
It is that carbon fibre initial rinse is cut according to labyrinth design requirement first by taking the fine multiple material product of the carbon of labyrinth as an example
Expect fabric and nylon wind pipe size, carbon fiber prepreg fabric is interlocked laying according to mechanics design requirement, is coated on nylon wind
The outside of pipe, product are put into die cavity well according to mold cavity shapes pre-shaped and locked, and then die cavity and precast body therein are carried out
0.5KPa is evacuated to, nylon wind pipe is inflated and is pressurized to 10MPa, mold temperature is risen to 150 DEG C by room temperature, heating speed
Rate is 50 DEG C/min, 150 DEG C of insulation 100min, and now high-energy rubber starts to expand as temperature raises produces pressure, so as to improve
Composite interlayer adhesion, resin are fully cured, then cooled down, and rate of temperature fall is 30 DEG C/min, near room temperature, is put
Gas, gas is unloaded to nylon wind pipe and returns to ambient atmosphere pressure, opened mould and take out product, the perfect sunken bubble-free of product surface.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is not departing from the principle and objective of the present invention
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.
Claims (6)
- A kind of 1. composite Vacuum Heat expansion molding technique, it is characterised in that step is,1) prepared by precast bodyA, prepreg fabric and expanding material core or nylon wind pipe size are cut according to Structural Design Requirement；B, according to mechanics design requirement by prepreg fabric laying, it is coated on the outside of expanding material core or nylon wind pipe；2) above-mentioned precast body is put into cavity body of mould, matched moulds locking；3) vacuumizing makes die cavity and precast body therein be in negative pressure state；4) when if expanding material core, heating and thermal insulation is carried out to mould, according to the solidification of the resin contained in prepreg fabric Parameter maintains corresponding temperature and time, solidifies precast body；During if nylon wind pipe, supercharging is inflated to nylon wind pipe, Heating and thermal insulation is carried out to mould again, according to the cure parameter of the resin contained in prepreg fabric maintain corresponding temperature and when Between, solidify precast body；60-230 DEG C of the startup expansion temperature of the expanding material, 1-50 times of volume multiplying power, swollen before and after expansion The pressure limit 0.1-20MPa of occipitoposterior position (of the fetus) life；Mold temperature is risen to 150 DEG C by room temperature in the step 4), heating rate is 10~100 DEG C/min, 150 DEG C of 10~120min of insulation；5) mould is cooled down, elimination negative pressure of deflating returns to ambient atmosphere pressure, and then gas is unloaded to nylon wind pipe simultaneously if nylon wind pipe Ambient atmosphere pressure is returned to, mould is opened and takes out the composite product after shaping.
- 2. composite Vacuum Heat expansion molding technique as claimed in claim 1, it is characterised in that the prepreg fabric is carbon The multiple material prepreg of fiber or the multiple material prepreg of glass fibre.
- 3. composite Vacuum Heat expansion molding technique as claimed in claim 1, it is characterised in that the negative pressure in the step 3) State, refer to vacuum>0.1Pa.
- 4. composite Vacuum Heat expansion molding technique as claimed in claim 1, it is characterised in that the negative pressure in the step 3) State, it is 1~100KPa to refer to vacuum.
- 5. composite Vacuum Heat expansion molding technique as claimed in claim 1, it is characterised in that to nylon in the step 4) Airduct is inflated supercharging, and pressure is 0.1~10MPa.
- 6. composite Vacuum Heat expansion molding technique as claimed in claim 1, it is characterised in that cooling in the step 5) Rate of temperature fall is 10~50 DEG C/min.
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| CN201610027401.5A CN105690803B (en) | 2016-01-15 | 2016-01-15 | A kind of composite Vacuum Heat expansion molding technique |
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| CN201610027401.5A CN105690803B (en) | 2016-01-15 | 2016-01-15 | A kind of composite Vacuum Heat expansion molding technique |
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| CN105690803A CN105690803A (en) | 2016-06-22 |
| CN105690803B true CN105690803B (en) | 2018-01-16 |
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| CN106730688A (en) * | 2017-01-10 | 2017-05-31 | 桐乡波力科技复材用品有限公司 | Reeded wall ball racket of inside casing band and preparation method thereof |
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| CN107901449A (en) * | 2017-11-13 | 2018-04-13 | 厦门市豪尔新材料股份有限公司 | A kind of preparation method of the multiple material structure of the high-energy rubber rigid foam of high-strength light |
| CN108353862A (en) * | 2018-02-10 | 2018-08-03 | 湖南狼图腾碳纤维科技有限公司 | A kind of preparation method of hollow carbon fiber buoy |
| CN111333980B (en) * | 2018-12-18 | 2022-08-09 | 航天特种材料及工艺技术研究所 | Fluororubber and thermal expansion forming method |
| CN110254000A (en) * | 2019-07-09 | 2019-09-20 | 厦门市中豪强碳纤复合材料有限公司 | A kind of sandwich insulating bar and preparation method thereof |
| CN111016533A (en) * | 2019-12-31 | 2020-04-17 | 东莞艾可迅复合材料有限公司 | Hollow carbon fiber wheel hub and manufacturing method thereof |
| CN114211776A (en) * | 2021-12-13 | 2022-03-22 | 厦门市中豪强碳纤复合材料有限公司 | Manufacturing method for composite molding of carbon fiber support |
| CN115071165A (en) * | 2022-07-06 | 2022-09-20 | 厦门鸿基伟业复材科技有限公司 | Forming die and method for carbon fiber composite material |
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