CN106142587B - A kind of hot membrane preformation method of the double bags of composite material - Google Patents
A kind of hot membrane preformation method of the double bags of composite material Download PDFInfo
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- CN106142587B CN106142587B CN201610601302.3A CN201610601302A CN106142587B CN 106142587 B CN106142587 B CN 106142587B CN 201610601302 A CN201610601302 A CN 201610601302A CN 106142587 B CN106142587 B CN 106142587B
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- inner septum
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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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- 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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The present invention principally falls into composite material preform technique field, and in particular to a kind of hot membrane preformation method of the double bags of composite material.Prepreg overlay is packaged in the double diaphragm bags being made of inner septum bag and outer diaphragm bag by the method first, and then double diaphragm bags containing prepreg overlay are installed on pre-forming device, and it is preforming to carry out the hot membrane of double bags.In double hot membrane preform process of bag, by control in inner septum bag with the pressure in outer diaphragm bag, normal pressure outside prepreg overlay face is set to be reduced to zero, it is preforming using pre-forming device completion prepreg overlay, prepare composite material pre-shaped articles.Normal pressure outside prepreg overlay face can be reduced to zero by the method, effectively facilitate fiber lay down layer interlayer slip, the defects of avoiding fiber flexing and fold, and effectively simplify double membrane preforming process control flows, while special transformation need not be carried out to existing pre-forming device.
Description
Technical field
The present invention principally falls into composite material preform technique field, and in particular to a kind of hot membrane of the double bags of composite material is pre-
Forming method.
Background technology
Traditional manual laying prepreg/autoclave technique is mainly using pre- consistent with product structure of manual mode laying
Leaching material laying, then using solidification of hot-press tank.As composite material is increasingly large-scale in the extensive application of aircaft configuration and its component
The problems such as change, complicate, and manual laying production efficiency is low, Forming Quality is unstable is further prominent, therefore, composite material system
The automatic laying technology of part develops rapidly.In order to further improve production efficiency, ensure preforming quality, hot diaphragm forming technique
Come into being.The plane prepreg overlay for being preheating to preforming temperature is pressed into complicated shape by the technology utilization negative pressure of vacuum
Preform, its speed of production is fast, Forming Quality is high.
At present, it is main preforming using single membrane or the progress of double membrane two ways in hot diaphragm forming technique.It is single every
Film preforming process refers to carry out using one layer of membrane covering prepreg overlay preforming；Double membrane preforming process refer to utilize
Two layers of membrane encapsulation prepreg overlay carries out preforming.In current hot diaphragm forming technique, by manual laying or automatic paving
Plane prepreg overlay with technique laying is placed under single-layer septum or between two-layer separator, and global transfer is preforming to hot membrane
In equipment, to prepare L-shaped, C-shaped and Ω shape composite material pre-shaped articles.
The core of composite material preforming process is exactly prepreg overlay interlayer slip.Promote prepreg overlay interlayer slip
The key for the defects of being effective control fiber flexing and fold, and then ensure preforming quality.It is no matter preforming using single membrane
Technique, or double membrane preforming process, prepreg overlay will inevitably be subject to normal pressure outside face, which will increase
Prepreg overlay interfacial friction, is unfavorable for interlayer slip, there is the risk for the defects of fiber flexing and fold occur.For double
Membrane preforming process, in order at utmost reduce normal pressure, it is necessary to pressure between the double membranes of whole technical process control,
This virtually increases the fussy degree of technique.
The content of the invention
In view of the above-mentioned problems, the present invention discloses a kind of hot membrane preformation method of the double bags of composite material, the method can
Normal pressure outside prepreg overlay face is reduced to zero, fiber lay down layer interlayer slip is effectively facilitated, avoids fiber flexing and fold
The defects of, and effectively simplify double membrane preforming process control flows, while existing pre-forming device need not be carried out special
Different transformation.
The present invention is achieved by the following technical solutions：
A kind of double hot membrane preformation methods of bag of composite material, the method first by prepreg overlay be packaged in by it is interior every
In double diaphragm bags of film bag and outer diaphragm bag composition, double diaphragm bags containing prepreg overlay are then installed on pre-forming device
On, it is preforming to carry out double hot membranes of bag, in double hot membrane preform process of bag, by control in inner septum bag with outside every
Pressure in film bag, makes normal pressure outside prepreg overlay face be reduced to zero, and it is pre- to complete prepreg overlay using pre-forming device
Shaping, prepares composite material pre-shaped articles.
Further, the inner septum bag realizes connection vacuum source or atmospheric environment, institute by an inner septum bag gas-guide tube
State and a valve is set on inner septum bag gas-guide tube, inner septum bag and vacuum source or big compression ring can be realized by closing the valve
The isolation in border.
Further, prepreg overlay is placed in the double bags being made of inner septum bag and outer diaphragm bag by encapsulating, had
Body comprises the following steps：
(1) encapsulation prepares inner septum bag：After prepreg laying, prepreg overlay is positioned on one layer of membrane, in advance
Leaching material laying surrounding uniformly places airfelt, then covers prepreg overlay using one layer of membrane, is packaged into using sealant
Inner septum bag；
(2) setting of inner septum bag gas-guide tube：An inner septum bag gas-guide tube is set to pass through the membrane of inner septum bag side, and
Ensure to seal between the tube wall of inner septum bag and inner septum bag gas-guide tube；
(3) setting of outer diaphragm bag：Inner septum bag is placed in outer diaphragm bag, the inner septum bag gas-guide tube through outside every
The membrane of film bag side, and ensure to seal between the tube wall of outer diaphragm bag and inner septum bag gas-guide tube.
Further, in double hot membrane preform process of bag, the pressure in control inner septum bag and in outer diaphragm bag
Power, double hot membranes of bag are preforming to specifically include following steps：
(1) by outer diaphragm bag by pre-forming device frame seal, and on the pre-forming device；
(2) valve on inner septum bag gas-guide tube is opened, inner septum bag gas-guide tube is connected vacuum source, by inner septum bag
Air is completely exhausted out in bag, forms vacuum；Then the frame gas-guide tube set on frame is connected into vacuum source, by outer diaphragm bag
Air is completely exhausted out in bag, forms vacuum；So that inner septum bag and outer diaphragm bag reach compressive state；
(3) vacuum source connected with inner septum bag gas-guide tube is disconnected, and keeps the valve opening on inner septum bag gas-guide tube,
Make to connect with atmospheric environment in the bag of inner septum bag, so that the pressure in inner septum bag bag is equal with atmospheric pressure, and then control pre-
Normal pressure is zero outside the face of leaching material laying；Then, close inner septum bag gas-guide tube on valve, avoid prepreg overlay in advance into
Type process air enters inner septum bag through valve；
(4) preforming tool is preheated, while preheats prepreg overlay, after prepreg overlay reaches preforming temperature,
Pre-forming device gas-guide tube is connected with vacuum source, gas flow is controlled by pre-forming device, below outer diaphragm bag
Air inside pre-forming device is gradually discharged, and prepreg overlay is gradually profile-followed on preforming tool, treats pre-forming device sky
Gas is completely exhausted out, and reaches vacuum state, and prepreg overlay and double diaphragm bags are bonded preforming tool completely, and prepreg overlay is completed
It is preforming；
(5) after prepreg overlay is cooled to operable temperature, take out preforming in the profile-followed composite material of preforming tool
Product.
Further, in step (2)-(4), remain that frame gas-guide tube is opened, make outer diaphragm bag connection vacuum source.
Further, in the hot membrane preform process, in order to ensure pressure and atmospheric pressure in the bag of inner septum bag
It is equal, that is, ensure that normal pressure is reduced to zero outside prepreg overlay face, being capable of constantly repeat step (2) and step (3).
Further, it is specially by the process that double diaphragm bags containing prepreg overlay are installed on pre-forming device：Will
Preforming tool is positioned in pre-forming device, and double bags containing prepreg overlay are installed on above preforming tool, wherein,
Outer diaphragm bag is sealed using frame and is fixed on pre-forming device, makes pre-forming device, frame and outer diaphragm bag lower diaphragm plate
Between form airtight environment.
Further, the structure of the composite material pre-shaped articles prepared is appointing in L-shaped, C-shaped and Ω shapes
Meaning is a kind of.
The advantageous effects of the present invention：
The method disclosed by the invention in hot membrane preform process, by control in inner septum bag with outer diaphragm bag
Interior pressure, makes normal pressure outside prepreg overlay face be reduced to zero, so as to effectively facilitate fiber lay down layer interlayer slip, avoids fibre
The defects of tieing up flexing and fold；Also, in hot membrane preform process, the whole connection vacuum source of outer diaphragm bag, avoids tradition
During preforming process in outer diaphragm bag pressure complex control, effectively simplify process system.
Brief description of the drawings
Fig. 1 is a kind of hot membrane preforming process schematic diagram of the double bags of composite material of the present invention；
Reference numeral：1. prepreg overlay, 2. airfelts, 3. inner septum bags, 4. sealants, 5. inner septum bag air guides
Pipe, 51. valves, 6. outer diaphragm bags, 7. pre-forming devices, 71. frames, 72 frame gas-guide tubes, 73. pre-forming device gas-guide tubes,
8. preforming tool.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is explained in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and
It is not used in the restriction present invention.
On the contrary, the present invention covers any replacement done in the spirit and scope of the present invention being defined by the claims, repaiies
Change, equivalent method and scheme.Further, in order to make the public have a better understanding the present invention, below to the thin of the present invention
It is detailed to describe some specific detail sections in section description.Part without these details for a person skilled in the art
Description can also understand the present invention completely.
Embodiment 1
The hot membrane preformation method of the double bags of a kind of composite material, as shown in Figure 1, the method is first by prepreg overlay 1
It is packaged in the double diaphragm bags being made of inner septum bag 3 and outer diaphragm bag 6, then by double diaphragm bags containing prepreg overlay 1
On pre-forming device 7, the hot membrane of the double bags of progress is preforming, in double hot membrane preform process of bag, passes through control
With the pressure in outer diaphragm bag 6 in inner septum bag 3 processed, normal pressure outside 1 face of prepreg overlay is set to be reduced to zero, utilization is preforming
Equipment completion prepreg overlay is preforming, prepares composite material pre-shaped articles.
The inner septum bag 3 realizes connection vacuum source or atmospheric environment, the inner septum by an inner septum bag gas-guide tube 5
A valve 51 is set on bag gas-guide tube 5, inner septum bag 3 and vacuum source or atmospheric environment can be realized by closing the valve 51
Isolation；
Prepreg overlay 1 is placed in the double bags being made of inner septum bag 3 and outer diaphragm bag 6 by encapsulating, is specifically included
Following steps：
(1) encapsulation prepares inner septum bag 3：After prepreg laying, prepreg overlay 1 is positioned on one layer of membrane,
1 surrounding of prepreg overlay uniformly places airfelt 2, then covers prepreg overlay 1 using one layer of membrane, utilizes sealant 4
It is packaged into inner septum bag 3；1 surrounding of prepreg overlay uniformly places 2 reason of airfelt：Airfelt 2 has the spy of porous fluffy
Property, after inner septum bag 3 is connected with vacuum source, being conducive to air in inner septum bag 3 discharges, it is ensured that reaches compressive state；
(2) setting of inner septum bag gas-guide tube 5：Set an inner septum bag gas-guide tube 5 through 3 side of inner septum bag every
Film, and ensure to seal between the tube wall of inner septum bag 3 and inner septum bag gas-guide tube 5；
(3) setting of outer diaphragm bag 6：Inner septum bag 3 is placed in outer diaphragm bag 6, the inner septum bag gas-guide tube 5 passes through
The membrane of outer 6 side of diaphragm bag, and ensure to seal between the tube wall of outer diaphragm bag 6 and inner septum bag gas-guide tube 5.
It is described with the pressure in outer diaphragm bag 6 in control inner septum bag 3 in double hot membrane preform process of bag
Double hot membranes of bag are preforming to specifically include following steps：
(1) outer diaphragm bag 6 is sealed by the frame 71 of pre-forming device, and on the pre-forming device 7, made
Airtight environment is formed between 6 lower diaphragm plate of pre-forming device 7, frame 71 and outer diaphragm bag；
(2) valve 51 on inner septum bag gas-guide tube 5 is opened, inner septum bag gas-guide tube 5 is connected vacuum source, by inner septum
Air is completely exhausted out in the bag of bag 3, forms vacuum；Then the frame gas-guide tube 72 set on frame 71 is connected into vacuum source, will
Air in the bag of outer diaphragm bag 6 is completely exhausted out, forms vacuum；So that inner septum bag 3 and outer diaphragm bag 6 reach compression shape
State；
Since inner septum bag 3 and outer diaphragm bag 6 reach compressive state, in the next step, though inner septum bag 3 is connected
Atmospheric environment, but outer diaphragm bag 6 is unlikely to occur under compression a large amount of gases and flows into inner septum bags 3, so influence in advance into
Type；If inner septum bag 3 does not connect vacuum source, the frame gas-guide tube 72 set on frame 71 is directly connected into vacuum source, outer membrane
Vacuum is formed between bag 6 and inner septum bag 3, but inner septum bag 3 can be full of air, can not encapsulate prepreg overlay 1, it is preforming
Can not carry out.
(3) vacuum source connected with inner septum bag gas-guide tube 5 is disconnected, and keeps the valve 51 on inner septum bag gas-guide tube 5
Open, make to connect with atmospheric environment in the bag of inner septum bag 3, so that the pressure in 3 bags of inner septum bag is equal with atmospheric pressure, and then
It is zero to control normal pressure outside the face of prepreg overlay 1；Then, the valve 51 on inner septum bag gas-guide tube 5 is closed, avoids presoaking
Expect that air enters inner septum bag 3 through valve 51 in 1 preform process of laying；Wherein, in this step, close valve 51 and avoid gas
Body air enters the reason for inner septum bag 3 and is：If in follow-up 73 pumping process of equipment gas-guide tube, if prepreg overlay
1 rigidity is excessive, it is difficult to deform, air will enter inner septum bag 3 through valve 51, can cause lower floor's membrane of only outer diaphragm bag 6 with
Shape, and 6 upper strata membrane of outer diaphragm bag is not profile-followed, can not complete preforming.
(4) preforming tool 8 is preheated, while preheats prepreg overlay 1, when prepreg overlay 1 reaches preforming temperature
Afterwards, pre-forming device gas-guide tube 73 is connected with vacuum source, gas flow is controlled by pre-forming device 7, with outer diaphragm bag 6
Air inside the pre-forming device 7 of lower section is gradually discharged, and prepreg overlay 1 is gradually profile-followed on preforming tool 8, treat it is pre- into
7 air of type equipment is completely exhausted out, and reaches vacuum state, and prepreg overlay 1 and double diaphragm bags are bonded preforming tool 8 completely, in advance
Leaching material laying is completed preforming.
(5) after prepreg overlay 1 is cooled to operable temperature, take out the profile-followed composite material of preforming tool 8 in advance into
Type product, the operable temperature are 20-60 DEG C.
In step (2)-(4), remain that frame gas-guide tube 72 is opened, make outer diaphragm bag connection vacuum source；The process
Avoid during traditional double membrane preforming process in diaphragm bag the shortcomings that the complex control of pressure, effectively simplify technique system
Degree.
And in the hot membrane preform process, in order to ensure pressure is equal with atmospheric pressure in the bag of inner septum bag 3,
That is 1 outer normal pressure of prepreg overlay face is reduced to zero, being capable of constantly repeat step (2) and step (3).
Wherein, valve 51 can be designed as program-controlled three-way valve, can by the control system integration with pre-forming device,
Connection vacuum source, connection air, the programme-control for closing three functions are realized, to realize automation.
It is specially by the process that double diaphragm bags containing prepreg overlay 1 are installed on pre-forming device 7：By preforming mould
Tool 8 is placed in pre-forming device 7, and double bags containing prepreg overlay 1 are installed on the top of preforming tool 8, wherein, it will set
There is the side of the outer diaphragm bag 6 of inner septum bag gas-guide tube 5 upward, and outer diaphragm bag 6 is sealed and is fixed on pre- using frame 71
On former 7；The outer diaphragm bag 6 is connected by a frame gas-guide tube 72 with vacuum source.
The structure for the composite material pre-shaped articles that the hot membrane preformation method of double bags prepares for L-shaped, C-shaped and
Any one in Ω shapes.
The method of the invention has following compared with double membrane preforming process in the prior art and single membrane process
Advantage：
1) can effectively be supported on pre-forming device compared to single membrane preforming process, double hot membrane preforming process of bag
Prepreg overlay, avoids prepreg overlay from not yet reaching preforming temperature, is bent under the action of dead weight, so as to fibre occur
The defects of tieing up flexing and fold；
2) can be by advance relative to double membrane preforming process and single membrane preforming process, double hot membrane preforming process of bag
The outer normal pressure of leaching material roofing is reduced to zero, so that prepreg overlay frictional force is reduced, it is sliding between effectively facilitating fiber lay down layer by layer
The defects of moving, avoiding fiber flexing and fold；
3) relative to double membrane preforming process, the outer diaphragm bag of double hot membrane preforming process of bag is whole to connect vacuum source,
Avoid realizing that at utmost reducing prepreg spreads by pressure change complicated in diaphragm bag during double membrane preforming process
The outer normal pressure of aspect, so as to effectively simplify process system.
Embodiment 2
A kind of hot membrane preformation method of the double bags of composite material, specifically includes following steps：
(1) encapsulation prepares inner septum bag：After prepreg laying, prepreg overlay is positioned on one layer of membrane, in advance
Leaching material laying surrounding uniformly places airfelt, then covers prepreg overlay using one layer of membrane, is packaged into using sealant
Inner septum bag；
(2) setting of inner septum bag gas-guide tube：An inner septum bag gas-guide tube is set to pass through the membrane of inner septum bag side, and
Ensure to seal between the tube wall of inner septum bag and inner septum bag gas-guide tube；
(3) setting of outer diaphragm bag：Inner septum bag is placed in outer diaphragm bag, the inner septum bag gas-guide tube through outside every
The membrane of film bag side, and ensure to seal between the tube wall of outer diaphragm bag and inner septum bag gas-guide tube.
(4) preforming tool is placed in pre-forming device；
(5) side of inner septum bag gas-guide tube will be provided with outer diaphragm bag upward, and outer diaphragm bag be passed through preforming
Device framework seals, and on the pre-forming device, pre-forming device, frame and outer diaphragm bag lower diaphragm plate form gas-tight ring
Border；
(6) valve on inner septum bag gas-guide tube is opened, inner septum bag gas-guide tube is connected vacuum source, by inner septum bag
Air is completely exhausted out in bag, forms vacuum；Then the frame gas-guide tube set on frame is connected into vacuum source, by outer diaphragm bag
Air is completely exhausted out in bag, forms vacuum；So that inner septum bag and outer diaphragm bag reach compressive state；
(7) vacuum source connected with inner septum bag gas-guide tube is disconnected, and keeps the valve opening on inner septum bag gas-guide tube,
Make to connect with atmospheric environment in the bag of inner septum bag, so that the pressure in inner septum bag bag is equal with atmospheric pressure, and then control pre-
Normal pressure is zero outside the face of leaching material laying；Then, close inner septum bag gas-guide tube on valve, avoid prepreg overlay in advance into
Type process air enters inner septum bag through valve；
(8) preforming tool is preheated, while preheats prepreg overlay, after prepreg overlay reaches preforming temperature,
Pre-forming device gas-guide tube is connected with vacuum source, gas flow is controlled by pre-forming device, below outer diaphragm bag
Air inside pre-forming device is gradually discharged, and prepreg overlay is gradually profile-followed on preforming tool, treats pre-forming device sky
Gas is completely exhausted out, and reaches vacuum state, and prepreg overlay and double diaphragm bags are bonded preforming tool completely, and prepreg overlay is completed
It is preforming.
(9) after prepreg overlay is cooled to operable temperature, take out preforming in the profile-followed composite material of preforming tool
Product, the operable temperature are 20-60 DEG C.
In step (6)-(8), remain that frame gas-guide tube is opened, make outer diaphragm bag connection vacuum source.
In the hot membrane preform process, in order to ensure pressure is equal with atmospheric pressure in the bag of inner septum bag, i.e., really
Protect normal pressure outside prepreg overlay face and be reduced to zero, being capable of constantly repeat step (6) and step (7).
Claims (5)
- A kind of 1. hot membrane preformation method of the double bags of composite material, it is characterised in thatPrepreg overlay is packaged in the double diaphragm bags being made of inner septum bag and outer diaphragm bag by the method first, prepreg Laying, inner septum bag and outer diaphragm bag are set gradually from the inside to the outside, i.e. inner septum bag encapsulation parcel prepreg overlay, outer diaphragm bag Inner septum bag of the encapsulation parcel containing prepreg overlay；Then preforming tool is positioned in pre-forming device, double diaphragm bags containing prepreg overlay is installed on preforming Above mould；It is preforming then to carry out the hot membrane of double bags, concretely comprises the following steps：(1) by outer diaphragm bag by pre-forming device frame seal, and on the pre-forming device, preforming set is made Airtight environment is formed between standby, frame and outer diaphragm bag lower diaphragm plate；(2) the inner septum bag realizes connection vacuum source or atmospheric environment, the inner septum bag by an inner septum bag gas-guide tube One valve is set on gas-guide tube, inner septum bag and the isolation of vacuum source or atmospheric environment can be realized by closing the valve； The valve on inner septum bag gas-guide tube is opened, inner septum bag gas-guide tube is connected vacuum source, air in the bag of inner septum bag is complete Full discharge, forms vacuum；Then the frame gas-guide tube set on frame is connected into vacuum source, air in the bag of outer diaphragm bag is complete Full discharge, forms vacuum；So that inner septum bag and outer diaphragm bag reach compressive state；(3) vacuum source connected with inner septum bag gas-guide tube is disconnected, and keeps the valve opening on inner septum bag gas-guide tube, is made interior Connected in the bag of diaphragm bag with atmospheric environment, so that the pressure in inner septum bag bag is equal with atmospheric pressure, and then control prepreg Normal pressure is zero outside the face of laying；Then, the valve on inner septum bag gas-guide tube is closed, avoids the preforming mistake of prepreg overlay Journey air enters inner septum bag through valve；(4) preforming tool is preheated, while preheats prepreg overlay, will be pre- after prepreg overlay reaches preforming temperature Former gas-guide tube is connected with vacuum source, by pre-forming device control gas flow, with below outer diaphragm bag it is pre- into Air inside type equipment is gradually discharged, and prepreg overlay is gradually profile-followed on preforming tool, treats that pre-forming device air is complete Full discharge, reaches vacuum state, and prepreg overlay and double diaphragm bags are bonded preforming tool completely, prepreg overlay complete in advance into Type；(5) after prepreg overlay is cooled to operable temperature, take out in the profile-followed composite material pre-shaped articles of preforming tool.
- 2. the hot membrane preformation method of the double bags of a kind of composite material according to claim 1, it is characterised in that will by encapsulating Prepreg overlay is placed in the double bags being made of inner septum bag and outer diaphragm bag, specifically includes following steps：(1) encapsulation prepares inner septum bag：After prepreg laying, prepreg overlay is positioned on one layer of membrane, prepreg Laying surrounding uniformly places airfelt, then covers prepreg overlay using one layer of membrane, using sealant be packaged into every Film bag；(2) setting of inner septum bag gas-guide tube：Set an inner septum bag gas-guide tube to pass through the membrane of inner septum bag side, and ensure Sealed between the tube wall of inner septum bag and inner septum bag gas-guide tube；(3) setting of outer diaphragm bag：Inner septum bag is placed in outer diaphragm bag, the inner septum bag gas-guide tube passes through outer diaphragm bag The membrane of side, and ensure to seal between the tube wall of outer diaphragm bag and inner septum bag gas-guide tube.
- A kind of 3. double hot membrane preformation methods of bag of composite material according to claim 1, it is characterised in that step (2)- (4) in, remain that frame gas-guide tube is opened, make outer diaphragm bag connection vacuum source.
- A kind of 4. double hot membrane preformation methods of bag of composite material according to claim 1, it is characterised in that the heat every In film preform process, in order to ensure pressure is equal with atmospheric pressure in the bag of inner septum bag, that is, method outside prepreg overlay face is ensured Zero is reduced to pressure, being capable of constantly repeat step (2) and step (3).
- 5. the hot membrane preformation method of the double bags of a kind of composite material according to claim 1, it is characterised in that prepare The structure of the composite material pre-shaped articles is any one in L-shaped, C-shaped and Ω shapes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610601302.3A CN106142587B (en) | 2016-07-27 | 2016-07-27 | A kind of hot membrane preformation method of the double bags of composite material |
| PCT/CN2016/106551 WO2018018803A1 (en) | 2016-07-27 | 2016-11-21 | Preforming method for double-bag thermal diaphragm made of composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610601302.3A CN106142587B (en) | 2016-07-27 | 2016-07-27 | A kind of hot membrane preformation method of the double bags of composite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11845234B2 (en) | 2019-01-25 | 2023-12-19 | National Research Council Of Canada | Articulated forming caul for composite blank vacuum forming |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA3052723A1 (en) * | 2017-02-08 | 2018-08-16 | Cytec Industrial Materials (Derby) Limited | Double diaphragm shaping of composite materials, assemblies for such shaping, and resulting composite materials |
| CN110654042A (en) * | 2018-06-29 | 2020-01-07 | 成都飞机工业（集团）有限责任公司 | Vacuum compaction method for reducing porosity of composite material member |
| CN110757830B (en) * | 2018-07-26 | 2022-07-26 | 中国商用飞机有限责任公司 | Thermal diaphragm forming method for hat-shaped stringer |
| CN110654040B (en) * | 2019-09-27 | 2021-08-03 | 大连理工大学 | Thermal diaphragm preforming device for composite material shell and working method of thermal diaphragm preforming device |
| CN112644040A (en) * | 2020-12-29 | 2021-04-13 | 百佳瑞航天航空新材料(苏州)有限公司 | Low-cost liquid forming test plate manufacturing process |
| CN116061465B (en) * | 2023-01-28 | 2023-06-02 | 江苏新扬新材料股份有限公司 | Preparation method of full-composite pressure-resistant water tank |
| CN116021797A (en) * | 2023-01-28 | 2023-04-28 | 哈尔滨远驰航空装备有限公司 | Mold for air inlet channel pipe type part structure and molding process |
| CN116985426A (en) * | 2023-06-26 | 2023-11-03 | 苏州固特维科技有限公司 | Composite material double-bag thermal diaphragm preforming equipment and method thereof |
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| US4407685A (en) * | 1979-07-23 | 1983-10-04 | Ford Aerospace & Communication Corporation | Metallized film transfer process |
| US5116216A (en) * | 1991-02-28 | 1992-05-26 | The United States Of America As Represented By The Secretary Of The Navy | Apparatus for preparing thermoplastic composites |
| US6017484A (en) * | 1997-01-21 | 2000-01-25 | Harold P. Hale | Method for manufacture of minimum porosity, wrinkle free composite parts |
| JP2009220392A (en) * | 2008-03-17 | 2009-10-01 | Toray Ind Inc | Drape forming method |
| CN102294831B (en) * | 2011-09-15 | 2014-05-14 | 上海晋飞复合材料科技有限公司 | Compression moulding method for prepreg |
| CN104441677A (en) * | 2014-09-16 | 2015-03-25 | 沈阳飞机工业（集团）有限公司 | R angle folding and molding method of large-thickness composite material workpiece |
| CN104441697A (en) * | 2014-11-17 | 2015-03-25 | 上海飞机制造有限公司 | Performing method of composite material C-shaped component |
| CN205929503U (en) * | 2016-07-27 | 2017-02-08 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Unfamiliar preforming equipment of two bag heat of combined material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11845234B2 (en) | 2019-01-25 | 2023-12-19 | National Research Council Of Canada | Articulated forming caul for composite blank vacuum forming |
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| WO2018018803A1 (en) | 2018-02-01 |
| CN106142587A (en) | 2016-11-23 |
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