CN106507742B - A kind of method of manufacture composite material hollow cap strip - Google Patents
A kind of method of manufacture composite material hollow cap stripInfo
- Publication number
- CN106507742B CN106507742B CN200610120487.2A CN200610120487A CN106507742B CN 106507742 B CN106507742 B CN 106507742B CN 200610120487 A CN200610120487 A CN 200610120487A CN 106507742 B CN106507742 B CN 106507742B
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- cap strip
- resin
- solidification
- formpiston
- resin film
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- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
A kind of method of manufacture composite material hollow cap strip that the present invention is provided, mainly includes：Prepare block resin masking；Refinement solidification temperature, hardening time, solidifying pressure and solidification apply point；Prefabricated component preforming cap strip on the formpiston will be covered without pitch based fiber loop bonding；Cap strip is encapsulated between interior vacuum bag and former together with formpiston (i.e. core), and they are together encapsulated in peripheral hardware vacuum bag, outer bag encapsulating structure in being formed, then applying vacuum pressure, in the presence of heating and pressurization, resin film melting infiltration is impregnated between the fiber of cap strip fiber loop bonding thing, makes resin film-like.Wherein in manufacture composite material hollow cap strip reinforced structure part, complete to suppress using template vacuum with resin film using infiltration pre-setting and two steps of solidification, and the method that mould structure is combined using formpiston and former.Avoid core to take out in cap strip from after solidification, the difficult problem of the female mould forming demoulding.And resin penetration is completely, content is uniform.Resin is tightly combined with fiber.
Description
Technical field
The present invention is on permeating carbon fiber technological principle using composite resin film immersion, using combination
The method that matched molds manufacture hollow cap strip reinforced structure.
Background technology
With the extensive use of composite aboard, it is related to high-frequency alternate load and vibration shock etc.
The composite application of loaded components is also more and more.Conventional vacuum bag-autoclave manufacturing process can not
Full component manufactures higher and higher use requirement.To improve the rigidity of airplane parts, parts are further controlled
Weight, reinforcement cap strip structure type as shown in Figure 2 is designed on plate, is also accordingly increased.Because each
Individual part thickness uniformity, it is to mitigate aircraft weight that inner chamber, which keeps the cap strip of hollow state, and enhancing aircraft is strong
The important means of degree.It is vacuum bag-autoclave method to manufacture the common manufacturing process of the composite material parts.Should
Method uses some and manufactures unidirectional or Fabric prereg, by the order of each laying set in advance, angle
Blank is formed with after size layer by layer laying, blank is encapsulated into vacuum bag, then enters autoclave, by adding
Gentle pressurization makes matrix resin solidify to form part.Vacuum bag-autoclave technique productions composite material parts
Maximum shortcoming is that interlaminar shear strength is low.The reason for causing this shortcoming be, due to can not construction layer between laying
Between reinforcing fiber.And the reinforcing fiber of part is actually only just having through broadwise.By vacuum bag-hot pressing
The parts of tank technique productions are normally only used for the parts at static load position, are such as used to vibrate alternate load
The parts machining at position, is not only difficult to the shear strength for improving interlayer, and be easily caused parts and make
It is layered between process middle level, cutting section is with the presence of obvious hole.Fatigue strength and reliability are substantially reduced.
To improve the interlaminar shear strength of vacuum bag-autoclave method part, prior art also develops many and changed
Enter type vacuum bag-autoclave process, such as resin film infusion process as shown in Figure 4 is exactly it
One of.The resin film infusion technique in flat part and simple structural member easily realize be it is justifiable,
And just to seem highly difficult using the technique in cap strip structure as shown in Figure 2.For now, in cap
Realize that resin penetration is not yet shown in relevant document report on material.
Keep the shape of cap strip, must use mould, and mould structure be exactly nothing but former, formpiston and
Three kinds of forms of negative and positive combination die.Formpiston form easily realizes resin film infusion, but profile control is bad, and
And most it is difficult to core can not take out from cap strip after solidification.The female mould forming demoulding is easy, and profile is controlled,
Better appearance, but resin penetration is difficult, resin content and resin uniformity control difficulties are big.Have been reported that use
Silastic material core manufacture cap strip.But silicon rubber core high cost, size retentivity is poor, it is difficult to weight
Use again.It is poor to the cap strip part universality that is related to composite.
The present invention is further to develop and improve the hollow cap strip reinforcement of above-mentioned resin film infusion technique manufacture to be combined
The method of material parts.
The content of the invention
The purpose of the present invention be for above-mentioned prior art exist weak point there is provided a kind of highly versatile,
With low cost, completely, resin is tightly combined resin penetration with fiber, and easy mold release, profile is controlled, efficiency
The method of high manufacture composite material hollow cap strip.
In order to achieve the above object, the method for a kind of manufacture composite material hollow cap strip that the present invention is provided, bag
Include, following steps：
A. block resin film is prepared, one is used for the formpiston of preforming cap strip；One provides cap strip type face
And size, the former for solidification；The template in bottom-type face after one offer part solidification, one is used for branch
Support the core of cap strip；
B. block resin is ground into fine particulate, be uniformly laid on the type face of mould, in resin particle
Upper application pressing plate, periphery uses block；Granular resin will be ground into and equably laid forming parts
Template on, put and placed on isolation cloth, resin thickness and be at least 2mm metal platen；
C. condition of cure：On the basis of MAT'L specification, refinement solidification temperature, hardening time, solidification pressure
Power and solidification apply point.
D. prefabricated component preforming cap strip on the formpiston will be covered without the fiber loop bonding for impregnating any resin；
E. above-mentioned cap strip is encapsulated between interior vacuum bag and former together with formpiston, pacified in the interior shape of cap strip
Formpiston is filled, former is laid in the profile of cap strip, and they are together encapsulated in peripheral hardware vacuum bag, is formed
Interior outer bag encapsulating structure, then applying vacuum pressure, and heating 50 DEG C more than normal temperature, pressure is passed by pressing plate
It is delivered on resin, is kept for a period of time, in the presence of heating and pressurization, resin film melting infiltration is impregnated into
Between the fiber of cap strip fiber loop bonding thing, make resin film-like.
The present invention has the advantages that compared to prior art.
The method provided according to the present invention, after composite cap strip part encapsulated vacuum system, temperature rise
To the fusing point of resin, resin melting is into liquid, under the double action of external and internal pressure and vacuum, liquid tree
Fat is infiltrated into fiber because of capillarity, and resin is by the superiors of fiber and infiltration is uniform.Meanwhile, true
The air capacity existed between the lower fiber of sky effect is few, and can also take away remnants air during resin flowing,
Therefore the inside parts after solidifying are not in defect caused by air or bubble.Wherein in manufacture composite
In hollow cap strip reinforced structure part, completed using infiltration pre-setting and two steps of solidification and resin film is true using template
Pneumatics system, and the method that mould structure is combined using formpiston and former.Avoiding core can not be after solidification
Taken out in cap strip, the problem of female mould forming demoulding is difficult.And the cap strip reinforced composite material structure of manufacture, outside
Shape is controlled.Appearance and size is accurately attractive in appearance, and completely, content is uniform for resin penetration.Resin is combined tightly with fiber
It is close, observed by cutting section, find no obvious hole and exist, compared to common prior art production
Technique, can save production hour 30%, reduce equipment investment 20%, and the shear strength of part is improved
More than 15%.Throughput rate is fast, low cost.
Brief description of the drawings
It is below in conjunction with the accompanying drawings and real in order to further illustrate rather than limit the above-mentioned implementation of the present invention
Applying example, the present invention is further described, but does not therefore limit the present invention among described practical range
All these designs should be regarded as this technology disclosure of that and protection scope of the present invention
Fig. 1 is a kind of cross-sectional view of cap strip structure described in manufacture method of the present invention.
Fig. 2 is the schematic diagram that resin film uses template vacuum to suppress.
Fig. 3 is a kind of composite cap strip inner cavity of component placed on top rigid matrix according to the present invention, interior shape
Middle installation formpiston, profile lays former, the tooling combination view of overcoat vacuum bag.
Fig. 4 is a kind of resin film infusion technological principle schematic diagram of the prior art.
Embodiment
Fig. 1 is to use the inventive method, can be added two in two or more cap strips, figure in single operation
The cap strip of individual profile status is the reinforcement of composite material parts panel.The length of cap strip typically can be in 5m
More than.
Present embodiment is discussed on the basis of mould has completed also to complete with fiber loop bonding.
Manufacture in composite material hollow cap strip reinforced structure part, can be completed using infiltration pre-setting and two steps of solidification.Gu
Change condition reference composite MAT'L specification and according to practice determine.Manufacture hollow cap strip reinforced composite material part
Method, mainly includes：Fiber loop bonding, the manufacture of resin film, the structure design of mould, the manufacture of cap strip structure
And condition of cure is determined.Resin film is suppressed using template vacuum.Mould structure is combined using formpiston and former
Method.
Loop bonding process is completed by special sewing knitting equipment, and laying layer is designed according to the thickness of strength demand and part
Number, fiber mat or fibre sleeving, fiber are stitched into by carbon fiber by certain angle and the number of plies by Z-direction fiber
By connection fibration into an entirety between beam.Material after loop bonding is one without any resin of dipping
Fiber loop bonding set or referred to as fiber preform.Fibre sleeving is that softness can be folded.
Hollow cap strip reinforcement component die structure is molded cap strip using matched molds combination.It is preforming with formpiston,
The mould structure of former solidification.Mould is made up of template, core, the part of cavity plate three.The molding surface size of former
It is the cap strip profile of part.The shape of cap strip structure is shaped by formpiston, outside former solidification control cap strip structure
Shape size.
The determination of condition of cure.The solidification specification of reference resin material, selectes to solidify with specification identical and presses
Power.Apply pressure, the condition phase that temperature and hardening time recommend with MAT'L specification before resin softening temperature
When.The condition of cure of whole design of part on the basis of MAT'L specification, refinement solidification temperature, hardening time,
Solidifying pressure and solidification apply point.Final part is set to reach that profile is accurate, resin content is uniform, thickness is correct
Quality requirement.
In Fig. 2, it by the resin of block resin-made film-forming state is to realize that heating melting is oozed that resin film preparation, which is,
Saturating premise, naturally it is also possible to directly purchase the resin of membrane stage.The present embodiment uses the method that mould is molded
Prepare resin film.Preparing resin film is suppressed formed under the vacuum pressures with plate shaped template 22 and aluminium pressing plate.
Big block resin is first ground into fine grained, then granular resin 23 will be ground into and is equably laid
Onto the upper mould plate 22 of forming parts, pressing plate 24 is placed thereon, isolation cloth is put.Placed on resin thick
Degree is at least 2mm metal platen.The thickness of resin film is determined by the blend stop 25 of both sides and the volume of resin
Afterwards, when suppressing resin film, the periphery of pressing plate 24 is placed and prevents the excessive isolating bar of resin.Surface resin film
Isolated by plastic foil, to facilitate the use of resin film.The temperature of press mold, temperature are determined according to the characteristic of resin
Generally can more than normal temperature 50 DEG C it is enough.Then it is encapsulated in vacuum bag, applies vacuum in full
Degree.With enough vacuum press times, suppressed by heating.After vacuum and pressure apply, when being kept for one section
Between after (about 24hrs).Pressure is acted on resin, forms membranaceous in the restrictive condition of pressing plate 24.Pressure is applied
Plus period can check the effect of resin film forming, if resin can not overlay film forming, can heat up 30 DEG C~
50℃。
Cap strip structure is manufactured.The resin dipping of cap strip structure is carried out first, then impregnates the resin of base plate, and this is
In order to ensure that the resin of cap strip structure and base plate reaches that dipping is uniform.Because the resin dipping of base plate must compare
Cap strip constructed dip is easier, and the resin impregnation sequence of cap strip is after base plate.Cap is observed after cap strip dipping
The shape of material and the uniformity of resin, carry out base surface resin dipping again if predetermined effect is reached；Such as
Fruit dipping effect is bad, then can be impregnated and repaired again.It is first during resin penetration impregnates
The top of cap strip structure is first impregnated, the resin of fused solution impregnates cap in the presence of gravity and capillary effect
The side wall of material.Second step impregnates the connection bent edge part of cap strip and base plate again.Pacify during shaping in the interior shape of cap strip
Formpiston (i.e. core) is filled, after resin penetration fiber, cap strip can keep preferable shape；Solidified
Journey lays former in the profile of cap strip, cap strip and whole part is had accurate appearance and size.
The preparation of solidifying pressure resin film is referring to Fig. 3.Mould structure is molded cap strip using matched molds combination
Structure.Formpiston is installed using resin penetration in the interior shape of cap strip on fiber, by resin film, formpiston structure,
Female mould structure, which is encapsulated in mould, to be had on type face, and resin penetration is combined rear cap strip with fiber and is just provided with and mould phase
Same profile.Cavity plate 29 (former) is laid in the profile of the cap strip 20 after prefabricated, in cap strip 20
Placed in chamber and release cloth 28 is placed above vacuum inner bag 27, cap strip inner chamber, wooden mould is laid thereon, by cap
Material is encapsulated between interior vacuum bag and former.Then they are together encapsulated in outer vacuum bag 30, formed
Interior outer bag encapsulating structure carries out applying vacuum pressure, and heats 50 DEG C more than normal temperature, and pressure is transmitted by pressing plate
Onto resin, kept for a period of time (20 to 30 minutes).In the presence of heating and pressurization, resin film melts
Melt infiltration to be impregnated between the fiber of cap strip fiber loop bonding thing.Wherein, template provides bottom surface portions after part solidification
Type face, formpiston (i.e. core) is used to support cap strip, and cavity plate 29 provides type face and the size of cap strip.Solidification
Pressure is applied to the interior shape of cap strip structure, forces patch cavity plate 29 type face, while not influenceing base plate and side again
Solidifying pressure applies.Due to the dual pressurization of inside and outside vacuum bag, therefore solidifying pressure on cavity plate 29 is
Balance, the type face of cavity plate 29 is also balance, and the strength and stiffness of cavity plate 29 are not required.Module
The half of the intracavity space of occupancy, second half is used for the placement of interior vacuum bag.After vacuum and pressure apply, just
Property module laminating cap strip 20 top.In the presence of heating and pressurization, resin film melting penetrates into fiber loop bonding
Between the fiber of thing.Because there is the dipping fiber meeting of the interaction resin of pressure uniform, while true inside and outside because being in cap strip 20
The structure type of empty bag, pressure is applied only on fiber, will not be applied on mold tooling, to mold tooling
Deformation effect is negligible.
Base plate impregnating resin.Aluminum pressing plate is laid in the upper surface of base plate in addition and ensures that the upper surface of base plate is put down
It is whole.By heating and press resin melt impregnation between fiber.Plus after vacuum, vacuum pressure is acted directly on
The interior lumen type face of base surface and cap strip structure, base plate is molded by molding plane, and base plate is supported by mould, cap
The profile of material structure is limited by cavity plate, and cap strip structure is then molded by cavity plate face.
Solidification, the condition of cure of whole design of part refines solidification temperature, solidification on the basis of MAT'L specification
Time, solidifying pressure and solidification apply point.In autoclave, by condition of cure applying vacuum, pressure,
Certain temperature and time condition solidifies matrix resin.Solidifying pressure is applied to 0.55MPa~0.65MPa.
The application temperature spot of solidifying pressure, 30 DEG C are moved down in temperature spot as defined in MAT'L specification.Other condition of cure ginsengs
According to the requirement of specific MAT'L specification.
The demoulding, after the completion of solidification, removes vacuum bag material and auxiliary material, and the base surface of part directly just can be with
Exposure is outside.And with the presence of auxiliary material, it is necessary to which careful remove, outside cap strip structure in the die cavity of cap strip structure
There is cavity plate 29 on surface.Because the limitation of non-binding between cavity plate and part, can be easily with general tool
Remove.The demoulding of total is very easy to.
Fig. 4 is the structural principle of prior art resin film infusion technique.Mainly including template 1, template 2,
Backing plate 3, resin film 4 has hole isolation cloth 5, and fiber preform body 6 has hole isolation cloth 7, inhales glue material
8, isolation 9, membrane cover plate 10, gas permeable material 11, bag making film 12, block 13.Wherein sealant bar
Placed in template 1 and backing plate 2 and fiber preform body 5 is placed on thick resin film 3, resin film, thereon
Lay and inhale glue material 7 and cover plate 9.
Claims (4)
1. a kind of method for manufacturing composite material hollow cap strip, including, following steps：
A. block resin film is prepared, one is used for the formpiston of preforming cap strip；One provides cap strip type face
And size, the former for solidification；The template in bottom-type face after one offer part solidification, one is used for branch
Support the core of cap strip；
B. block resin is ground into fine particulate, be uniformly laid on the type face of mould, in resin particle
Upper application pressing plate, periphery uses block；Granular resin will be ground into and equably laid forming parts
Template on, put and placed on isolation cloth, resin thickness and be at least 2mm metal platen；
C. condition of cure：On the basis of MAT'L specification, refinement solidification temperature, hardening time, solidification pressure
Power and solidification apply point；
D. prefabricated component preforming cap strip on the formpiston will be covered without the fiber loop bonding for impregnating any resin；
E. above-mentioned cap strip is encapsulated between interior vacuum bag and former together with formpiston, pacified in the interior shape of cap strip
Formpiston is filled, former is laid in the profile of cap strip, and they are together encapsulated in peripheral hardware vacuum bag, is formed
Interior outer bag encapsulating structure, then applying vacuum pressure, and it is warmed to more than normal temperature 50 DEG C, pressure is passed by pressing plate
It is delivered on resin, is kept for a period of time, in the presence of heating and pressurization, resin film melting infiltration is impregnated into
Between the fiber of cap strip fiber loop bonding thing, make resin film-like.
2. the method for the manufacture composite material hollow cap strip according to claims 1, it is characterised in that
The temperature of the press mold of determination is more than normal temperature 50 DEG C.
3. the method for the manufacture composite material hollow cap strip according to claims 1, it is characterised in that
Plus after vacuum, vacuum pressure acts directly on the interior lumen type face of base surface and cap strip structure, base plate presses shaping mould
Face is molded, and base plate is supported by mould, and the profile of cap strip structure is limited by cavity plate.
4. the method for the manufacture composite material hollow cap strip according to claims 1, it is characterised in that
Solidifying pressure is applied to 0.55MPa~0.65MPa, the application temperature spot of solidifying pressure, in MAT'L specification regulation
Temperature spot move down 30 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610120487.2A CN106507742B (en) | 2006-12-01 | 2006-12-01 | A kind of method of manufacture composite material hollow cap strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610120487.2A CN106507742B (en) | 2006-12-01 | 2006-12-01 | A kind of method of manufacture composite material hollow cap strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106507742B true CN106507742B (en) | 2011-08-24 |
Family
ID=58264203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610120487.2A Active CN106507742B (en) | 2006-12-01 | 2006-12-01 | A kind of method of manufacture composite material hollow cap strip |
Country Status (1)
| Country | Link |
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| CN (1) | CN106507742B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561778A (en) * | 2019-07-26 | 2019-12-13 | 中国航空工业集团公司济南特种结构研究所 | Composite material small pit forming and pressurizing device and method |
| CN111152478A (en) * | 2019-12-13 | 2020-05-15 | 中国航空制造技术研究院 | Resin flow control method for integral forming of hat-shaped reinforced wall plate RFI |
| CN113276444A (en) * | 2021-06-10 | 2021-08-20 | 西安爱生技术集团有限公司 | Co-curing manufacturing process method for unmanned aerial vehicle carbon fiber fuselage wall plate/small-section hollow hat beam |
-
2006
- 2006-12-01 CN CN200610120487.2A patent/CN106507742B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561778A (en) * | 2019-07-26 | 2019-12-13 | 中国航空工业集团公司济南特种结构研究所 | Composite material small pit forming and pressurizing device and method |
| CN111152478A (en) * | 2019-12-13 | 2020-05-15 | 中国航空制造技术研究院 | Resin flow control method for integral forming of hat-shaped reinforced wall plate RFI |
| CN111152478B (en) * | 2019-12-13 | 2021-09-14 | 中国航空制造技术研究院 | Resin flow control method for integral forming of hat-shaped reinforced wall plate RFI |
| CN113276444A (en) * | 2021-06-10 | 2021-08-20 | 西安爱生技术集团有限公司 | Co-curing manufacturing process method for unmanned aerial vehicle carbon fiber fuselage wall plate/small-section hollow hat beam |
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