CN107214979B - A method of improving resin transfer molding (RTM) process forming composite yield rate - Google Patents
A method of improving resin transfer molding (RTM) process forming composite yield rate Download PDFInfo
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- CN107214979B CN107214979B CN201710500185.6A CN201710500185A CN107214979B CN 107214979 B CN107214979 B CN 107214979B CN 201710500185 A CN201710500185 A CN 201710500185A CN 107214979 B CN107214979 B CN 107214979B
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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
- B29C70/36—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 impregnating by casting, e.g. vacuum casting
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/0277—Apparatus with continuous transport of the material to be cured
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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
- B29C70/54—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)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention belongs to polymer matrix composites liquid condition shaping technologies, are related to a kind of method for improving resin transfer molding (RTM) process forming composite yield rate.The present invention is by increasing resin heater between resin hold-up tank and mold, reduce the injection temperature of resin in resin hold-up tank, reduce the risk of resin implode in resin hold-up tank, extend effective injection phase of resin, and the injection temperature and injection viscosity of resin are accurately controlled, significantly improve the Forming Quality of composite material parts.
Description
Technical field
The invention belongs to polymer matrix composites liquid condition shaping technologies, are related to a kind of raising resin transfer molding (RTM) process molding
The method of composite finished product rate.
Background technique
Carbon fiber enhancement resin base composite material have lightweight, high specific strength, high ratio modulus, fatigue crack-resistant performance it is good,
Advantage corrosion-resistant, convenient for the uniqueness such as large area monolithic molding, is widely used to aviation aircraft and engine structure, becomes
The critical material of aircraft equipment, dosage also have become one of the mark of aircraft equipment advance.
Resin transfer molding forming technique, abbreviation RTM forming technique (Resin Transfer Molding) is in recent years
In a kind of widely applied liquid condition shaping composite material manufacturing technology in the fields such as Aeronautics and Astronautics.Its principle is in rigid die type
Intracavitary laying presses performance and the designed dry state fiber preform body of structural requirement, in specific pressure vessel, that is, resin hold-up tank
Low viscosity resin, is then injected into mold cavity using injection device, is made by the interior injection temperature that resin is heated to setting
Resin is sufficiently infiltrated with fiber, is finally carried out elevated cure according to the technological specification of resin, is finally obtained and die profile
Consistent composite material parts.In order to guarantee resin can quick and complete injection part, usually set under the injection temperature of setting
Rouge has lower viscosity, is generally not more than 300cp, 100cp can be lower than when more.However under low viscosity state, heat
The resin of solidity has had certain reactivity, start slow reaction and heat release, resin storage with what is injected with deaeration
Tank is typically designed to thicker closed container and is unfavorable for radiating for pressure resistance and heat preservation, therefore the temperature of the resin in resin hold-up tank
Degree can slowly be increased with the progress of deaeration and injection, and the self-accelerating reaction phenomenon of resin can be with tree in this resin hold-up tank
The increase of rouge dosage and become apparent from, when the temperature of resin reaches critical value, the quick-fried of resin will occur in resin hold-up tank
Poly- phenomenon not only will cause part rejection, equipment damage, and will appear safety accident.As RTM technique is led in aerospace
Domain is widely used, and when forming the aerospace composite element of larger size, needs disposable more resin,
The risk of resin implode can greatly increase in resin hold-up tank.
In addition, the viscosity that self-accelerating reaction phenomenon of the resin in resin hold-up tank also results in resin rises, to drop
Low seepage velocity of the resin to preform, the front and back variation phenomenon of this resin viscosity can cause the molding of part can not
The risk of control causes the rejection rate of part to increase.
Again, when imitating resin in short-term using certain special high temperature high tenacity, such as Hexcel company
The PR520 of RTM230ST or Cytec company, since the injection temperature of the type resin is higher (more than 160 DEG C), and solidification temperature
Only 180 DEG C, reactivity of the resin under injection temperature is very high, higher compared to usual resins implode risk, while the type
Effective injection phase of resin is extremely short (in 35min), can further shorten effective note of resin using conventional resin deaeration technique
The phase is penetrated, the difficulty of forming part is substantially increased.
Summary of the invention
The purpose of the present invention is: for deficiency existing for conventional resins transfer molding forming composite technology, propose one
The method that kind improves resin transfer molding (RTM) process forming composite yield rate.
The technical solution of the invention is as follows, and system for use in carrying includes molding die, resin, resin hold-up tank, resin spilling
Tank, vacuum source and pressure source, it is characterised in that: resin thermostat, the method packet are connected between resin hold-up tank and mold
Include following steps:
1) it preparing resin thermostat, includes closed cavity inside the resin thermostat, the height of cavity is 0.1~
2mm, width are 10mm~500mm, and length is 20mm~500mm；The resin thermostat is using oil heating, electric heating or steam
The form of heating carries out thermostatic control to cavity, and the material of cavity is metal material；The resin thermostat is resistant to technique
The maximum injection pressure and highest injection temperature of setting and it is air tight indeformable；
2) pressure source, resin hold-up tank, valve I, resin thermostat, valve II, mold, valve III, resin are overflowed into tank
It is sequentially connected with vacuum source using pipeline, valve I, valve II and valve III are in close state；
3) temperature of resin hold-up tank is increased to T1 by the heating temperature-viscosity curve of reference resin, at temperature T1,
The viscosity of resin is within the scope of 300cp~500cp；The temperature of mold is increased to T2, at temperature T2, the viscosity of resin exists
Within the scope of 60cp~150cp；The temperature of resin thermostat is increased to T3, at temperature T3, the viscosity of resin 60cp~
Within the scope of 150cp；
4) prepared resin is poured into resin hold-up tank, and deaeration processing is carried out to resin；
5) vacuum source, valve II and valve III are opened, tank is overflowed to mold, resin thermostat and resin and carries out vacuumizing place
Reason；
6) after resin deaeration is disposed, pressure source is opened, according to the output of preset technique adjustment pressure source
Pressure value opens valve I, the resin in resin hold-up tank is made to flow through resin thermostat and be injected into mold；
7) after resin spilling tank begins with resin spilling, valve III, valve II and valve I are successively closed, according to resin
Technique require that mold is carried out elevated cure and to obtain final part.
The cavity metal material manufacture good using thermal conductivity, such as steel, copper, aluminium and its alloy.
The temperature T1 < temperature T2.
Temperature T3 >=temperature the T2, viscosity of the resin in the viscosity under temperature T3≤at temperature T2.
The advantages of the present invention are:
1, the present invention reduces the temperature of resin in resin hold-up tank by increasing resin thermostat, at a lower temperature
The reactivity of resin is lower, and self-accelerating reaction phenomenon is greatly inhibited, and reduces the risk of resin implode, improves resin
The yield rate of transfer modling technological forming composite material；
2, the present invention reduces the temperature of resin in resin hold-up tank by increase resin thermostat but maintains reasonable
In range of viscosities, the deaeration effect of resin is not influenced but not, but also can extend the inclined heated plate of resin, is further dropped
Ratio containing gas in low resin；
3, the temperature T3 of resin thermostat according to the present invention is equal to or the injection temperature T2 of a little higher than mold, but controls
In the upper limit of the injectable temperature range of resin, the resin for flowing through resin thermostat is safe and reliable；
4, resin thermostat according to the present invention is using the physics thermally conductive method of thin cavity large contact surface to flowing through
Resin is quickly heated, not only needed for amount of resin it is few, waste is few, and physics it is thermally conductive method safety it is reliable；
5, the present invention hardly influences the injection operation phase of resin under lower temperature conditions on resin deaeration, can make
Effective operation phase of resin is employed entirely in part injection process, extends effective injection time of part, reducing resin has
The effect operation phase not enough causes part not injected completely and generates the risk of waste product, improves RTM technological forming composite finished product
Rate；
6, the present invention is especially suitable for quick RTM moulding process or high temperature RTM moulding process, the resins of quick RTM technique
Operating time is extremely short, more demanding to effective operation phase of resin；And the resin injection temperature of high temperature RTM technique is higher, implode
Risk is greater than common RTM technique；
7, resin thermostat designability of the present invention is good, and the material to cavity can be required according to the heating of resin
It is selected and is designed with structure, it can also be within the scope of the injection temperature of resin to mold injection temperature T2 and resin thermostat
Temperature T3 is designed；
8, the present invention is implemented simple, it is thus only necessary to increase resin thermostat, be not required to existing RTM process equipment and
Mold is transformed, and has good RTM technique universality；
In conclusion the present invention reduces resin by increasing resin heater between resin hold-up tank and mold
The injection temperature of resin in hold-up tank, reduces the risk of resin implode in resin hold-up tank, extends effective injection of resin
Phase, and the injection temperature and injection viscosity of resin are accurately controlled, significantly improve the Forming Quality of composite material parts.This hair
It is bright to propose a kind of method for improving resin transfer molding (RTM) process forming composite yield rate, it is quick-fried to reduce rtm resin
Poly- risk extends effective operation phase of resin, and implementation is simple and reliable, can significantly improve RTM forming composite product
Yield rate.
The operation principle of the present invention is that:
1, the present invention is carrying out deaeration to resin 11 at lower temperature T1, and the reactivity of resin 11 is lower, improves
Use the safety of resin 11；
2, the resin thermostat 5 according to the present invention method convection current thermally conductive using the physics of metal foil cavity large contact surface
Resin through resin thermostat is quickly heated, and heat exchange efficiency is high, 11 quick heating of resin and uniformly；The chamber of resin thermostat 5
The structure size of body 6 can be according to the initial temperature T1 of resin 11, the injection temperature T2 of resin 11, the flow of resin 11, resin
The parameters such as the coefficient of heat transfer of metal used in 11 coefficient of heat transfer, cavity 6 calculate the minimal-contact area of cavity 6, therefore cavity 6
Thickness and area can according to the technique of resin 11 require be designed；
3, the temperature T3 of resin thermostat 5 according to the present invention can be greater than or equal to the temperature T2 of mold 4, when resin 11
When the relative value for being quickly ramped up to temperature T2 from temperature T1 is smaller, the thermal energy for needing to exchange is less, and the heat-energy transducer that cavity 6 provides is enough
More, then the temperature T3 of resin thermostat 5 and the temperature T2 of mold 4 are equal；And when resin 11 is quickly ramped up to temperature from temperature T1
When the relative value of degree T2 is larger, the thermal energy for needing to exchange is more, if 6 contact area of cavity is not big enough, can not provide enough exchanges
When thermal energy, the temperature T3 of resin thermostat 5 can be made to be slightly above injection temperature T2, improve the commutative thermal energy of cavity 6, finally make
Resin 11 reaches T2 in the outlet temperature of resin thermostat 5.
Detailed description of the invention
Fig. 1 is the schematic diagram for the RTM forming method that the present invention uses；
Fig. 2 is the schematic diagram of the contact surface for the resin thermostat that the present invention uses；
Specific embodiment
The present invention is a kind of method for improving resin transfer molding (RTM) process forming composite yield rate, the system comprises
Molding die 4, resin 11, resin hold-up tank 30, resin overflow tank 20, vacuum source 60 and pressure source 70, it is characterised in that: are setting
Resin thermostat 5 is connected between rouge hold-up tank 30 and mold 4, described method includes following steps:
1) resin thermostat 5 is prepared, includes closed cavity 6 inside the resin thermostat 5, the height of cavity 6 is 0.1
~2mm, width are 10mm~500mm, and length is 20mm~500mm；The resin thermostat 5 using oil heating, electric heating or
Steam-heated form carries out thermostatic control to cavity 6, and the material of cavity 6 is metal material；The resin thermostat 5 can be resistant to
By maximum injection pressure and the highest injection temperature of technique initialization and it is air tight indeformable；
2) by pressure source 70, resin hold-up tank 30, valve I 40, resin thermostat 5, valve II 41, mold 4, valve III
42, resin is overflowed tank 20 and vacuum source 60 and is sequentially connected using pipeline 10, and valve I 40, valve II 41 and valve III 42, which are in, to close
Closed state；
3) temperature of resin hold-up tank 30 is increased to T1, in temperature T1 by the heating temperature-viscosity curve of reference resin 11
Under, the viscosity of resin 11 is within the scope of 300cp~500cp；The temperature of mold 4 is increased to T2, at temperature T2, resin 11
Viscosity is within the scope of 60cp~150cp；The temperature of resin thermostat 5 is increased to T3, at temperature T3, the viscosity of resin 11 exists
Within the scope of 60cp~150cp；
4) prepared resin 11 is poured into resin hold-up tank 30, and deaeration processing is carried out to resin 11；
5) vacuum source 60, valve II 41 and valve III 42 are opened, to mold 4, resin thermostat 5 and resin overflow tank 20 into
Row vacuumize process；
6) after 11 deaeration of resin is disposed, pressure source 70 is opened, according to preset technique adjustment pressure source 70
Output pressure value, open valve I 40, make the resin 11 in resin hold-up tank 30 flow through resin thermostat 5 and into mold 4 into
Row injection；
7) after resin spilling tank 20 begins with the spilling of resin 11, valve III 42, valve II 41 and valve I are successively closed
40, it requires to carry out elevated cure to mold 4 according to the technique of resin 11 and obtains final part.
The metal material manufacture good using thermal conductivity of cavity 6, such as steel, copper, aluminium and its alloy.
The temperature T1 < temperature T2.
Temperature T3 >=temperature the T2, viscosity of the resin 11 in the viscosity under temperature T3≤at temperature T2.
Embodiment 1
Part is the open three cells segment structure of composite material.Material system is CF3031/BA9914, the fiber volume of material
Content is 55% ± 3%；Wherein CF3031 is the T300 grade carbon fiber fabric that Weihai in Shandong province expands that the specification that company produces is 3K,
BA9914 resin is the High temperature epoxy resins that AirChina Composite Materials Co., Ltd. is liquid molding process research and development, part it is outer
Shape size are as follows: 2000mm × 1002mm × 200mm (length × width × height), part wall thickness are 6mm, wherein intermediate three interior chamber sizes
For 2000mm × 250mm × 182mm, two sides inner cavity needs BA9914 tree having a size of 2000mm × 120mm × 182mm, according to calculating
Rouge 20kg；Resin thermostat 5 is pre-processed, wherein the size of cavity 6 are as follows: 300mm × 100mm × 1mm (length × width × height),
Material is 45# steel.Specific implementation step is as follows:
1) by pressure source 70, resin hold-up tank 30, valve I 40, resin thermostat 5, valve II 41, mold 4, valve III
42, resin is overflowed tank 20 and vacuum source 60 and is sequentially connected using pipeline 10, and valve I 40, valve II 41 and valve III 42, which are in, to close
Closed state；
2) temperature of resin hold-up tank 30 is increased to 65 DEG C, the temperature of mold 4 is risen to 80 DEG C, by resin thermostat 5
Temperature rise to 80 DEG C；
3) configured BA9914 resin is poured into resin hold-up tank 30, maintains the temperature of resin hold-up tank 30 65
DEG C, vacuumizing and defoaming is carried out to BA9914 resin and handles 30min；
4) vacuum source 60, valve II 41 and valve III 42 are opened, to mold 4, resin thermostat 5 and resin overflow tank 20 into
Row vacuumize process 10min；
5) pressure source 70 is opened, 0.4MPa pressure is applied to the BA9914 resin in resin hold-up tank 30, opens valve I
40, BA9914 resins begin flow through resin thermostat 5 and are injected into mold 4, obtain resin thermostat 5 through monitoring and export
BA9914 resin temperature be 79.6 DEG C；
6) about after 45min, resin overflows tank 20 and begins with BA9914 resin spilling, successively closes valve III 42, valve II
41 and valve I 40, it heats up to mold 4, keeps the temperature 4h under the conditions of 180 DEG C, solidify and obtain final part.
Presentation quality, internal soundness through detecting part are all satisfied design requirement.
Embodiment 2
Part is that composite material 2.5D weaves fan balde structure.Material system is CCF800/PR520, the fiber of material
Volume content is 55% ± 3%；Wherein CCF800 is the T800 grade carbon fiber that Weihai in Shandong province expands that the specification that company produces is 12K
Dimension, PR520 resin are the high temperature high-toughness epoxy resin of Cytec company, the outer dimension of part are as follows: 700mm × 500mm (long ×
It is wide), thickness is gradually changed from tenon 60mm to blade tip 1.5mm, needs PR520 resin 10kg according to calculating；Resin thermostat 5 is preparatory
It processes, wherein the size of cavity 6 are as follows: 500mm × 100mm × 0.3mm (length × width × height), material are P20 steel.Specific implementation
Steps are as follows:
1) by pressure source 70, resin hold-up tank 30, valve I 40, resin thermostat 5, valve II 41, mold 4, valve III
42, resin is overflowed tank 20 and vacuum source 60 and is sequentially connected using pipeline 10, and valve I 40, valve II 41 and valve III 42, which are in, to close
Closed state；
2) temperature of resin hold-up tank 30 is increased to 110 DEG C, the temperature of mold 4 is risen to 170 DEG C, by resin thermostat
5 temperature rises to 168 DEG C；
3) PR520 resin is poured into resin hold-up tank 30, maintains the temperature of resin hold-up tank 30 at 110 DEG C, to PR520
Resin carries out vacuumizing and defoaming and handles 30min；
4) vacuum source 60, valve II 41 and valve III 42 are opened, to mold 4, resin thermostat 5 and resin overflow tank 20 into
Row vacuumize process 20min；
5) pressure source 70 is opened, 1.0MPa pressure is applied to the PR520 resin in resin hold-up tank 30, opens valve I 40,
PR520 resin begins flow through resin thermostat 5 and is injected into mold 4, obtains the outlet of resin thermostat 5 through monitoring
The temperature of PR520 resin is 169.2 DEG C；
6) about after 10min, resin overflows tank 20 and begins with PR520 resin spilling, successively closes valve III 42, valve II 41
It with valve I 40, heats up to mold 4, keeps the temperature 2h under the conditions of 180 DEG C, solidify and obtain final part.
Presentation quality, internal soundness through detecting part are all satisfied design requirement.
Embodiment 3:
Part is the non-open three chambers airfoil structure of composite material.Material system is U-3160/QY8911-4, the fiber of material
Volume content is 56% ± 3%；Wherein U-3160 is the T300 grade carbon fiber that Weihai in Shandong province expands that the specification that company produces is 3K
Fabric, QY8911-4 resin are the high temperature bismaleimide resin that AirChina Composite Materials Co., Ltd. is liquid molding process research and development,
The outer dimension of part are as follows: 500mm × 1002mm (long × wide), side height are 300mm, and side height is 0mm, part wall thickness
For 6mm, wherein intermediate three inner cavities are having a size of 500mm × 250mm × 282mm, two sides inner cavity having a size of 500mm × 120mm ×
282mm needs QY8911-4 resin 30kg according to calculating；Resin thermostat 5 is pre-processed, wherein the size of cavity 6 are as follows:
200mm × 150mm × 0.5mm (length × width × height), material are copper.
1) by pressure source 70, resin hold-up tank 30, valve I 40, resin thermostat 5, valve II 41, mold 4, valve III
42, resin is overflowed tank 20 and vacuum source 60 and is sequentially connected using pipeline 10, and valve I 40, valve II 41 and valve III 42, which are in, to close
Closed state；
2) temperature of resin hold-up tank 30 is increased to 80 DEG C, the temperature of mold 4 is risen to 90 DEG C, by resin thermostat 5
Temperature rise to 95 DEG C；
3) QY8911-4 resin is poured into resin hold-up tank 30, maintains the temperature of resin hold-up tank 30 at 80 DEG C, it is right
QY8911-4 resin carries out vacuumizing and defoaming and handles 30min；
4) vacuum source 60, valve II 41 and valve III 42 are opened, to mold 4, resin thermostat 5 and resin overflow tank 20 into
Row vacuumize process 15min；
5) pressure source 70 is opened, 0.6MPa pressure, QY8911-4 are applied to the QY8911-4 resin in resin hold-up tank 30
Resin begins flow through resin thermostat 5 and is injected into mold 4, obtains the BA9914 of the outlet of resin thermostat 5 through monitoring
The temperature of resin is 91.6 DEG C；
6) about after 50min, resin overflows tank 20 and begins with QY8911-4 resin spilling, successively closes valve III 42, valve
II 41 and valve I 40, it heats up to mold 4, keeps the temperature 10h under the conditions of 210 DEG C, solidify and obtain final part.
Presentation quality, internal soundness through detecting part are all satisfied design requirement.
Claims (4)
1. a kind of method for improving resin transfer molding (RTM) process forming composite yield rate, system for use in carrying includes molding die
(4), resin (11), resin hold-up tank (30), resin overflow tank (20), vacuum source (60) and pressure source (70), it is characterised in that:
Resin thermostat (5) are connected between resin hold-up tank (30) and mold (4), described method includes following steps:
1) it prepares resin thermostat (5), includes closed cavity (6), the height of cavity (6) inside the resin thermostat (5)
For 0.1~2mm, width is 10mm~500mm, and length is 20mm~500mm；The resin thermostat (5) is using oil heating, electricity
Heating or steam-heated form carry out thermostatic control to cavity (6), and the material of cavity (6) is metal material；The resin is permanent
Warm device (5) be resistant to technique initialization maximum injection pressure and highest injection temperature and it is air tight indeformable；
2) by pressure source (70), resin hold-up tank (30), valve I (40), resin thermostat (5), valve II (41), mold (4),
Valve III (42), resin are overflowed tank (20) and vacuum source (60) and are sequentially connected using pipeline (10), valve I (40), valve II
(41) it is in close state with valve III (42)；
3) temperature of resin hold-up tank (30) is increased to T1, in temperature by the heating temperature-viscosity curve of reference resin (11)
Under T1, the viscosity of resin (11) is within the scope of 300cp~500cp；The temperature of mold (4) is increased to T2, at temperature T2, tree
The viscosity of rouge (11) is within the scope of 60cp~150cp；The temperature of resin thermostat (5) is increased to T3, at temperature T3, resin
(11) viscosity is within the scope of 60cp~150cp；
4) prepared resin (11) is poured into resin hold-up tank (30), and deaeration processing is carried out to resin (11)；
5) vacuum source (60), valve II (41) and valve III (42) are opened, mold (4), resin thermostat (5) and resin are overflowed
Tank (20) carries out vacuumize process；
6) it after resin (11) deaeration is disposed, opens pressure source (70), according to preset technique adjustment pressure source
(70) output pressure value is opened valve I (40), the resin (11) in resin hold-up tank (30) is made to flow through resin thermostat (5)
And it is injected into mold (4)；
7) after resin spilling tank (20) begins with resin (11) spilling, valve III (42), valve II (41) and valve are successively closed
I (40) of door require to carry out elevated cure to mold (4) and obtain final part according to the technique of resin (11).
2. a kind of method for improving resin transfer molding (RTM) process forming composite yield rate according to claim 1,
It is characterized in that: cavity (6) the metal material manufacture good using thermal conductivity.
3. a kind of method for improving resin transfer molding (RTM) process forming composite yield rate according to claim 1,
It is characterized in that: the temperature T1 < temperature T2.
4. a kind of method for improving resin transfer molding (RTM) process forming composite yield rate according to claim 1,
It is characterized in that: the temperature T3 >=temperature T2, viscosity of the resin (11) in the viscosity under temperature T3≤at temperature T2.
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| CN113386373B (en) * | 2021-05-28 | 2023-03-21 | 上纬(天津)风电材料有限公司 | Integrated resin infusion method and system applied to wind power blade manufacturing |
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|---|---|---|---|---|
| CN1775514A (en) * | 2005-11-29 | 2006-05-24 | 天津工业大学 | Injection apparatus for resin transfer moulding technology |
| CN101439585A (en) * | 2007-11-23 | 2009-05-27 | 同济大学 | Unit equipment for molding autoclave/liquid mould of resin-based composite material |
| CN103561942A (en) * | 2011-05-27 | 2014-02-05 | 斯奈克玛 | Pressure-maintaining device for creating composite components by injecting resin and associated method |
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| CN107214979A (en) | 2017-09-29 |
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Effective date of registration: 20230913 Address after: 101300 Zhonghang Fucai No.1 scientific research building, aviation industrial park, Shunyi District, Beijing Patentee after: AVIC COMPOSITE Corp.,Ltd. Patentee after: AVIC BEIJING AERONAUTICAL MANUFACTURING TECHNOLOGY Research Institute Address before: 101300 507, AVIC industry and trade building, Shuanghe street, Shunyi District, Beijing Patentee before: AVIC COMPOSITE Corp.,Ltd. |