A kind of composite element versatility packaging method being easily achieved knockout courseTechnical field
The invention belongs to technical field of composite material manufacturing, in particular to the versatility encapsulation side of a kind of composite elementMethod.
Background technique
Between composite element in the fabrication process often can be since tooling surface roughness be excessive and component and toolingThermal expansion coefficient deviation and generate the reasons such as residual stress, cause component to be difficult to demould, especially the structures such as " drum " stringer, veryDifficulty deviates from core model from the multiple material component after solidification.Release method traditionally is (such as in tooling surface mount release cloth or paintingCover release agent) it is adapted to carry out the situation that structure is simple and tooling surface smoothness is preferable, and for answering with complex profileCondensation material component or tooling are since long-time uses and when bad operation causes surface smooth degree poor, only with biographyRelease method on system realizes the inefficient of knockout course.In addition, since the carelessness of operator leads to tooling surface shapeState is deteriorated or release agent holiday, the presence for smearing the problems such as irregular, and will lead to serious solidification rear part, easy mold release is not existingThe appearance of elephant.Though can complete knockout course by means of tool, it is likely that damaging to composite element, influencing it makesUse performance.Currently, the matched well of external excellent tooling manufacture level and demoulding product and construction material system, completelyIt solves the above problems, but this scheme is not suitable for the developing direction of China's national situation and technology, so that domestic still use traditional sideMethod solidifies release problems to solve multiple material component, is unfavorable for the mass production of composite element and the guarantor of internal soundnessCard.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of composite materials for being easily achieved knockout courseComponent versatility packaging method, the process characteristic of flexible Application auxiliary material are realized multiple using physical isolation and gas pressureCondensation material component and tooling efficiently separate, the technical scheme is that
A kind of composite element versatility packaging method being easily achieved knockout course comprising following steps:
Step 1: tooling surface being cleaned, first layer release agent, interval 15 are uniformly coated to tooling surface after cleaningAfter~30min, orthogonal direction uniformly coats second layer release agent, orthogonal with second layer release agent after being spaced 15~30min againDirection uniformly coats third layer release agent；
Step 2: by one layer of non-porous release film, entirely laying is on tooling surface, then to outer rim in the middle part of non-porous release filmSqueeze residual air, then excludes the bubble between isolation film and tooling；
Step 3: non-porous release film edge being sealed to using sealing joint strip and is arranged vacuum gas nozzle, is vacuumized, is guaranteedVacuum degree is not more than -0.092MPa, and then non-porous release film is made closely to be attached to tooling surface；
Step 4: being laid with prepreg in non-porous release film upper surface, while being successively laid with peelable cloth on multiple material blank, havingHole isolation film, even pressing plate and airfelt；
Step 5: tooling assembled in step 4 being integrally packaged with vacuum bag, then vacuum bag take out trueVacancy reason is put into autoclave after vacuum processing and is solidified so that vacuum degree is not more than -0.092MPa；
Step 6: to the tooling after solidification by being taken out in autoclave, being sealed off after cooling, opening is connected to non-porousVacuum gas nozzle on isolation film makes composite element effectively realize the separation with tooling surface by applying compressed air.
The non-porous release film, can directly to contact prepreg material, the smooth resin that will not influence in surface flows, andWith preferable toughness, air-tightness and heat resistance.
Tooling more complicated for forming surface in step 2, it is ensured that avoid isolation film from existing while good fit between the twoThere is fold in the biggish position of Curvature varying.
Compared with prior art, the beneficial effects of the present invention are: using auxiliary material physical isolation and compressed airThe power of application realizes efficiently separating for composite element and tooling, solves the previous composite material structure with complex profilePart be not easy to paste release cloth or only coating release agent not easy mold release the problem of, and avoid in the past due to being carried out by toolThe case where molding damages composite element.
Detailed description of the invention
Fig. 1 is using versatility encapsulation schematic diagram of the invention；
Fig. 2 is using composite element knockout course schematic diagram of the invention.
In figure: 1-tooling, 2-release agents, 3-non-porous release films, 4-sealing joint strips, 5-vacuum gas nozzles, 6-multiple materialsBlank, 7-peelable cloth, 8-have hole isolation film, 9-even pressing plates, 10-airfelts, 11-vacuum bags, 12-compressed airs.
Specific embodiment
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present inventionIn explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if shouldWhen particular pose changes, then directionality instruction also correspondingly changes correspondingly.
If Fig. 1 to Fig. 2 shows, the present invention provides a kind of composite element versatility encapsulation for being easily achieved knockout courseMethod comprising following steps:
A kind of composite element versatility packaging method being easily achieved knockout course comprising following steps:
Step 1: tooling surface is cleared up using acetone organic solvent, it is equal on tooling surface after 30min is dried in cleaningThree layers of release agent of even coating coats the orthogonal thereto direction in direction, the time interval of every layer of release agent coating between every layer of release agentFor 15~30min, next step operation is carried out after coating 15~30min of third layer release agent；
Step 2: by one layer of non-porous release film, entirely laying is on tooling surface, then to outer rim in the middle part of non-porous release filmExclusion remains in the air between isolation film and tooling；
Step 3: non-porous release film edge being sealed to using sealing joint strip and is arranged vacuum gas nozzle, is vacuumized, is guaranteedVacuum degree is not more than -0.092MPa, and then non-porous release film is made closely to be attached to tooling surface；
Step 4: being laid with prepreg in non-porous release film upper surface, while being successively laid with peelable cloth on multiple material blank, havingHole isolation film, even pressing plate and airfelt；
Step 5: the tooling after step 4 operation then carrying out vacuum bag together with blank overall package using vacuum bagVacuumize process, it is ensured that vacuum degree is not more than -0.092MPa, and packaged tooling and embryo material are put into autoclave and consolidatedChange；
Step 6: by the tooling after solidification by sealing off after taking out cooling in autoclave, opening is connected in non-porous release filmVacuum gas nozzle makes composite element effectively realize the separation with tooling surface by applying compressed air.
The non-porous release film, can directly to contact prepreg material, the smooth resin that will not influence in surface flows, andWith preferable toughness, air-tightness and heat resistance.
Tooling more complicated for forming surface in step 2, it is ensured that avoid isolation film from existing while good fit between the twoThere is fold in the biggish position of Curvature varying.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pairThe present invention is described in detail, and the those of ordinary skill in field is it is understood that still can be to specific embodiment party of the inventionFormula is modified or replaced equivalently, and without departing from any modification of spirit and scope of the invention or equivalent replacement, it should allCover in present claims range.