CN109878106B - Resin-based composite material heating and curing method based on dynamic thermal barrier - Google Patents
Resin-based composite material heating and curing method based on dynamic thermal barrier Download PDFInfo
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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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- 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
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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
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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
- B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
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Abstract
A resin-based composite material heating and curing method based on a dynamic thermal barrier aims at a self-heating and curing method of a composite material member, a flexible thermal barrier with dynamically adjustable and controllable heat transfer characteristics is applied to the periphery of a composite material and a mold, the heat transfer characteristics of the thermal barrier are dynamically adjusted and controlled according to a temperature homogenization strategy by combining the chemical heat release characteristics of the resin-based composite material in the curing process, and active control of the temperature distribution in the thickness direction or in the surface of the composite material is realized. The invention provides a dynamic thermal barrier of a self-heating curing technology of a resin-based composite material for the first time, and aims to ensure the temperature uniformity in the heating process of the material, simultaneously quickly relieve the exothermic impact of a curing reaction, greatly improve the curing quality of a composite material member, shorten the curing period and reduce the curing energy consumption.
Description
Technical Field
The invention relates to a composite material curing technology, in particular to a self-heating curing process method under the assistance of a composite material dynamic regulation and control thermal barrier. In particular to a method for heating and curing a resin-based composite material based on a dynamic thermal barrier.
Background
The resin-based composite material has developed into a key material in the fields of aerospace and the like by virtue of the advantages of high strength, high modulus, small specific gravity, good thermal stability, strong designability and the like. The curing process of the composite material is the key step which takes the longest time and has the highest energy consumption and plays a decisive role in the final performance of the part. In the curing process, the resin is heated to generate chemical crosslinking reaction, the chemical energy of resin molecular groups or chain segments is converted in the process of bonding the resin molecular groups or the chain segments into a molecular long chain or network structure, and finally the resin molecular groups or the chain segments are dissipated to the ambient environment in the form of heat energy, the heat emitted by the composite material in the crosslinking reaction is further catalyzed to react forward, and the uneven temperature distribution is further improved. The resin in the composite material has poor heat conduction performance, heat is mainly transmitted along the fiber direction, temperature unevenness is caused in the curing process of the composite material member, and particularly, a large temperature gradient is generated in the thickness direction. The above problems cause different degrees of curing in the thickness direction of the workpiece, generate thermal stress, and seriously affect the mechanical properties and the shape accuracy of the molded workpiece.
If a curing system is exposed in low-temperature air, the surface of the composite material in contact with the air dissipates a large amount of heat, and the temperature of the surface and the edge is easily lower than the central temperature. For example, in the microwave curing and heat preservation stage of the composite material without any heat insulation layer, the surface of the component is 40 ℃ lower than the central temperature, and the surface cannot be completely cured. To solve the problem, patent CN201610671002.2 proposes a method for rapidly curing a sandwich-structured composite material, in which a breathable insulating layer is applied to the periphery of an induction heating composite material to insulate the heat inside the material; in addition, the inventor's earlier academic papers have also disclosed applying thermal barriers to microwave-heated composite members to control the dissipation of heat from the composite itself.
However, when the curing reaction temperature is reached, the composite material can release heat rapidly, and a strong thermal shock is formed, so that the composite material is ablated, degraded and even scrapped. Furthermore, in order to release the residual stress to the maximum extent, the cooling rate of the composite material before demolding must be controllable. Therefore, the above method of applying a thermal barrier for self-heating curing method will not allow the composite material to obtain a large and controllable cooling rate when heat needs to be dissipated rapidly.
At present, no published data for solving the temperature uniformity and thermal shock release research in the curing process of the composite material based on the dynamic thermal barrier exists in China. On review of the international literature, Reinz Dichtungs GmbH, germany, was granted at 12.2008 with EP1905653B1, which discloses a heat shield in which a groove is provided through the inner and outer surfaces, which groove is closed by a device that opens and closes automatically according to the temperature, and by opening the closed hole, a heat release channel is formed to better control the temperature. The patent is mainly directed to temperature control of heat-generating mechanical components such as internal combustion engines. William et al, university of Pittsburgh, usa, in 2013 discloses US20130081786a1 patent which primarily teaches an insulation system that can selectively change the thermal conductivity to suit a particular ambient temperature. But the patent is primarily directed to heating and cooling problems in buildings. Boeing company inspires from the above patents, and discloses three patents including US14941066, EP16180232.7 and US9952007B2 in the 5 th and 4 th 2017 th months and 2018 th months, wherein the three patents mention that one or more thermal brakes in the self-regulating thermal insulation material expand and contract along with the change of the ambient temperature of the thermal insulation material, so that the thermal resistance of the thermal insulation material is automatically changed, the temperature change is responded without a control system, a power supply and human intervention, and the curing quality of the composite material is improved. The above patents all solve the problem of thermal insulation layer control to a certain extent in respective fields, such as internal combustion engines, buildings and the like, and the thermal brake insulation material proposed by boeing company can only provide a method for realizing passive control along with temperature change. Aiming at the curing process of the composite material with complex autocatalysis chemical reaction heat release, the method can not actively and dynamically adjust the temperature field and release the thermal shock in the curing process of the composite material in real time, and the accurate control of the temperature and the curing quality in the whole curing process is difficult to realize.
In summary, for the electrical loss heating and curing process of resin-based composite materials, a new method for achieving uniform temperature distribution in the heating process and rapidly relieving or eliminating thermal shock of curing reaction is needed, so that the temperature uniformity in the thickness direction of the composite materials is greatly improved, the curing quality of the composite material members is improved, and the curing energy consumption is reduced.
Disclosure of Invention
The invention aims to solve the problems that the uniformity of temperature in the thickness direction or in the surface of a resin matrix composite is poor, thermal shock of curing reaction is serious, the mechanical property of a composite part is greatly influenced, and even ablation, degradation and scrapping are caused in the self-heating curing process of the resin matrix composite at present, and provides a heating and curing method of the resin matrix composite based on a dynamic thermal barrier.
The technical scheme of the invention is as follows:
a heating and curing method of a resin-based composite material based on a dynamic thermal barrier is characterized in that aiming at the self-heating and curing characteristics of a composite material member, a flexible thermal insulation barrier with dynamically adjustable and controllable heat transfer characteristics is applied to the periphery of the composite material and a mold, the thickness of the composite material and the temperature of each point in the surface are measured according to the chemical heat release characteristics of the resin-based composite material in the curing process, the heat transfer characteristics of the thermal insulation barrier are dynamically adjusted and controlled in the processes of temperature rising, heat preservation and temperature lowering according to an active temperature homogenization control strategy, and the active control of the temperature distribution in the thickness direction or in the surface of the.
The flexible heat insulation barrier main body with the dynamically adjustable heat transfer characteristic is made of flexible materials with extremely low heat transfer coefficient, the flexible materials are tightly wrapped on the surface of a vacuum bag system of a composite material component, heat emitted by the composite material component is sealed in the flexible heat insulation barrier, the flexible materials with extremely low heat transfer coefficient are aerogel, polyurethane foam, glass wool or composite silicate felt type heat insulation materials, and the flexible heat insulation barrier is made of wave-transmitting materials aiming at a microwave curing or electromagnetic induction heating curing mode.
The method for dynamically regulating and controlling the heat transfer characteristic of the heat insulation barrier is a method for physically applying, evacuating or changing a heat transfer medium in the heat barrier, wherein the method for physically applying and evacuating is to dynamically load and evacuate the flexible heat insulation barrier by adopting a manual or automatic device, and when microwave and induction heating curing are adopted, a mechanical device which can normally run in a high-energy electromagnetic radiation field is used for dynamically loading and evacuating the flexible heat insulation barrier; the method for changing the heat transfer medium in the heat shield is to pass a strong cooling fluid with controllable flow speed and flow rate into the heat shield so as to improve the heat absorption and dissipation capacity of the heat shield.
The mechanical device dynamic loading and evacuation flexible heat insulation barrier device is a radiation-proof mechanical arm or a gear set.
The composite material is subjected to spontaneous thermosetting, namely the composite material member is used as a curing heating source, and the composite material is heated and cured by consuming externally input electric energy or the composite material releases self-stored chemical energy; the electric energy heating of loss external input for microwave solidification, electromagnetic induction solidification or fibre composite material self-resistance electric heat solidification, the chemical energy heating solidification for resin base front end solidification.
The active temperature homogenization control strategy is to judge the heating rate and the highest temperature according to the temperature distribution measured in real time, and apply a thermal barrier with extremely low heat transfer coefficient to the self-heating stage so as to realize zero temperature difference in the thickness direction and the surface; and for the reaction heat release impact in the thickness direction, setting an advance to trigger a dynamic evacuation procedure, evacuating the thermal barrier to expose the composite material at an open normal temperature, or introducing high-speed cooling liquid to quickly release the heat impact, for the temperature difference in the thickness direction exceeding the set threshold, setting an advance to trigger an application procedure, reapplying the thermal barrier to return the composite material to a zero temperature difference state, wherein the threshold and the advance are selected according to different materials, sizes, curing modes and process curves of the composite material.
The invention has the beneficial effects that:
the invention firstly and definitely provides a dynamic thermal barrier of the resin-based composite material electric loss self-heating curing technology, and breaks through the limitation that the prior curing process is carried out in an unchangeable atmosphere, and the uniformity control of the temperature only depends on the regulation and control of the fed-in energy; the heat release impact of the curing reaction is quickly relieved while the temperature uniformity in the material heating process is ensured, the curing quality of the composite material member can be greatly improved, the curing period is shortened, and the curing energy consumption is reduced.
Drawings
FIG. 1 is a schematic diagram of the principle of the curing method of the resin-based composite material based on dynamic thermal barrier;
FIG. 2 is a schematic view of a heat shield design with water cooling tubes.
Detailed Description
The invention will be further elucidated with reference to the drawings and specific embodiments. The following examples are intended only to illustrate certain specific examples of the process and are not intended to limit the scope of the invention. In addition, after the disclosure of the present invention, those skilled in the art may make any modifications or changes based on the principle of thermal curing of the dynamic thermal barrier resin-based composite material in the present invention, and the modifications or changes are within the scope of protection defined in the claims of the present application.
As shown in fig. 1-2.
A heating and curing method based on a dynamic thermal barrier resin-based composite material is characterized in that aiming at the spontaneous heat curing characteristic of a composite material member, the composite material member is used as a heating source, energy in various forms such as externally input electric energy and the like can be fed into the composite material through a transmission medium, heat generated by dissipation in the material is cured, the composite material member can also be cured by releasing chemical energy of the composite material, a flexible heat insulation barrier with dynamically adjustable and controllable heat transfer characteristics is applied to the periphery of the composite material and a mold, the heat transfer characteristics of the thermal barrier are dynamically adjusted and controlled in the processes of temperature rise, heat preservation and temperature reduction according to a temperature homogenization control strategy, and the active control of the temperature distribution in the thickness direction or the surface of the composite material is realized. By applying a dynamic thermal barrier to the resin matrix composite material electrical loss self-heating curing technology, the limitation that the curing process is carried out in an unchanged atmosphere and the temperature uniformity control only depends on the regulation and control of the fed-in energy in the prior art is broken through; the heat release impact of the curing reaction is quickly relieved while the temperature uniformity in the material heating process is ensured, the curing quality of the composite material member can be greatly improved, the curing period is shortened, and the curing energy consumption is reduced. The composite material is self-heated and cured, namely the composite material component is used as a curing heating source, and electric energy can be fed into the composite material through transmission media such as electrodes, cables, air and the like, and is lost and heated in the material and the composite material is cured; or the resin molecular group or chain segment releases the self-stored chemical energy to cure the composite material in the process of bonding the resin molecular group or the chain segment into a molecular long chain or network structure in the chemical crosslinking reaction of the composite material; the external electric energy loss heating can be microwave curing, electromagnetic induction curing or carbon fiber composite material self-resistance electric heating curing, and the chemical energy heating curing can be resin base front end curing and the like. The heat insulation barrier is made of flexible materials with extremely low heat transfer coefficient, as shown in figure 1, the heat insulation barrier is tightly attached to the surface of a vacuum bag system covering a composite material member and a corresponding mould, heat emitted by the composite material member is blocked in the heat insulation barrier, the heat insulation barrier can be heat insulation materials such as aerogel, polyurethane foam, glass wool and composite silicate felt, the heat insulation barrier needs to adopt wave-transparent materials aiming at solidification modes such as microwave solidification or electromagnetic induction heating, the heat insulation materials generally contain a large amount of dust, and when the heat insulation barrier is used, the heat insulation materials are wrapped by high-temperature-resistant auxiliary materials such as a vacuum bag and the like to prevent the dust from falling off and interfering the solidification of the composite material. The method for regulating and controlling the heat transfer characteristic of the heat barrier can be realized by a method of physically applying, withdrawing or changing a material heat transfer medium, namely dynamically loading and withdrawing the heat barrier by a manual or automatic device, for a microwave and induction heating curing method, mechanical devices which can normally operate in a high-energy electromagnetic and microwave radiation field and do not interfere with the curing process of the composite material, such as a radiation-proof mechanical arm, a wave-transparent gear set and the like, can be used, meanwhile, dynamic strong cooling fluid can be attached, the use modes in different heating environments can be different, and the material heat transfer medium can be changed by adding a water cooling pipeline or other devices which can quickly reduce the heat transfer coefficient of the heat barrier so as to facilitate heat dissipation in the heat barrier, as shown in fig. 2. The temperature homogenization control strategy is characterized in that the temperature in the thickness direction and the temperature on the surface of the composite material are respectively measured in the curing process (contact thermocouple temperature measurement, optical fiber temperature measurement or non-contact infrared thermal imaging temperature measurement can be utilized), the temperature rise rate and the highest temperature are judged according to the temperature distribution measured in real time, a thermal barrier with extremely low heat transfer coefficient is applied to the self-heating temperature rise stage, the heat is sealed and locked in the thermal barrier, and the zero temperature difference in the thickness direction and the surface is realized by utilizing the conduction effect of the temperature; and for the reaction heat release impact in the thickness direction, setting an advance to trigger a dynamic evacuation procedure, evacuating the thermal barrier to expose the composite material at an open normal temperature, or introducing high-speed cooling liquid to quickly release the heat impact, for the temperature difference in the thickness direction exceeding the set threshold, setting an advance to trigger an application procedure, reapplying the thermal barrier to return the composite material to a zero temperature difference state, wherein the threshold and the advance are selected according to the difference of the material, the size, the curing mode, the process curve and the like of the composite material.
Example 1.
This example is a 250mm x 250mm flat piece cured in a composite self-resistive electrothermal process using the curing method of the present invention based on a dynamic thermal barrier resin based composite member. The composite material to be tested is formed by laying carbon fiber reinforced bismaleimide resin matrix composite material prepreg T700/QY9611, and the laying method is [ 0/90 DEG C]10sThe total number of the layers is 20, and the thickness of the single-layer prepreg is 0.125 mm; the mould is a metal mould, the projection size of the mould close to the mould surface is 600mm multiplied by 600mm, and the thickness is 3 mm; the heat-insulating barrier adopts heat-insulating nano aerogel felt. The specific steps of this example are as follows:
step 1: preparing materials: cleaning the surface of a mould by using a cleaning solvent, taking out coiled bismaleimide prepreg from a cold storage, cutting 20 prepreg sheets with the size of 250mm multiplied by 250mm according to the design size of parts for later use, cutting 1 polyimide film with the size of 300mm multiplied by 300mm, 1 demoulding cloth with the size of 300mm multiplied by 300mm, 1 ventilated felt with the size of 400mm multiplied by 400mm and 1 vacuum bag with the size of 600mm multiplied by 600mm for later use, and preparing 20 red copper electrode plates with the size of 300mm multiplied by 30mm multiplied by 1mm for later use;
step 2: laying a prepreg: on a laying operation table, laying prepreg in a 0-degree direction on the operation table, laying two electrode plates at two ends perpendicular to the fiber direction on the operation table to remove air bubbles by compaction, laying prepreg in a 90-degree direction on the operation table to remove air bubbles by compaction, repeating the steps until all 20 layers of prepreg are laid, and connecting the electrodes with an external power supply with the maximum current of 300A and the maximum voltage of 10V;
and step 3: material laying: laying a polyimide film on the upper surface of a metal mold to play an insulating role, placing the laid prepreg in the center of the polyimide film, sequentially laying demolding cloth and an air-permeable felt, well insulating at a joint, mounting an optical fiber fluorescence temperature measuring sensor in the thickness direction of the composite material part, laying and packaging a vacuum bag, and arranging the optical fiber fluorescence temperature measuring sensor in a 12-path surface outside the vacuum bag;
and 4, step 4: arranging an insulating barrier: wrapping the nano aerogel felt with extremely strong heat insulation performance by using a vacuum bag, and closely attaching and arranging the nano aerogel felt on the surface of the composite material member vacuum bag system and the back of the mold so as to seal heat in the heat barrier;
and 5: curing the composite material: controlling the curing process according to a corresponding process curve through PID; in the temperature rise process of the composite material component, the thermal barrier tightly coats the composite material, when the temperature rise end is about to enter a 180 ℃ heat preservation stage, as long as the temperature measured by any one path of 13 optical fiber temperature measuring sensors in the surface and in the thickness direction exceeds a preset threshold value, the mechanical arm lifts the thermal insulation material, removes the thermal barrier, fully releases thermal shock, and when the temperature is reduced to 180 ℃, the mechanical arm puts down the thermal insulation material, reapplies the thermal barrier, and returns the temperature difference of the composite material to zero.
The final composite material member of the above example completes the curing of the whole material with small temperature difference, and no obvious exothermic impact occurs in the curing exothermic stage, thus realizing the improvement of the curing quality of the composite material member.
Example 2.
This example is a 250mm x 250mm flat piece cured in a composite microwave process using the method for curing a dynamic thermal barrier resin based composite member according to the invention. The composite material to be tested is formed by laying carbon fiber reinforced bismaleimide resin matrix composite material prepreg T700/QY9611, and the laying method is [ 0/90 DEG C]10sThe total number of the layers is 20, and the thickness of the single-layer prepreg is 0.125 mm; the mould is a glass mould, the projection size of the mould close to the mould surface is 600mm multiplied by 600mm, and the thickness is 3 mm; the heat-insulating barrier adopts heat-insulating nano aerogel felt. The specific steps of this example are as follows:
step 1: preparing materials: cleaning the surface of a glass mold by using a cleaning solvent, taking out coiled bismaleimide prepreg from a refrigeration house, cutting the bismaleimide prepreg into 20 prepreg sheets with the size of 250mm multiplied by 250mm according to the design size of parts for later use, cutting 1 polyimide film with the size of 300mm multiplied by 300mm, 2 demolding cloth with the size of 300mm multiplied by 300mm, 1 ventilated felt with the size of 400mm multiplied by 400mm and 1 vacuum bag with the size of 600mm multiplied by 600mm for later use;
step 2: material laying: laying demolding cloth on the upper surface of a glass mold, placing a pre-laid prepreg in the middle of the demolding cloth, sequentially laying the demolding cloth and the air felt on the demolding cloth, installing 1-path optical fiber fluorescence temperature measurement sensor in the thickness direction of the composite material part, laying and packaging a vacuum bag, and arranging 12-path optical fiber fluorescence temperature measurement sensors outside the vacuum bag;
and step 3: arranging an insulating barrier: embedding a water cooling pipeline in the nano aerogel felt with extremely strong heat insulation performance, wrapping the nano aerogel felt by using a vacuum bag, and closely attaching and arranging the nano aerogel felt on the surface of the composite material member vacuum bag system and the back of the mold so as to seal heat in the heat barrier;
and 4, step 4: curing the composite material: controlling the curing process according to a corresponding process curve through PID; in the temperature rise process of the composite material component, the thermal barrier tightly coats the composite material, when the temperature rise end is about to enter a 180 ℃ heat preservation stage, as long as the temperature measured by any one of 13 optical fiber temperature measuring sensors in the surface and in the thickness direction exceeds a preset threshold value, water is injected into a water cooling pipeline in the thermal barrier, the heat transfer coefficient of the thermal barrier is rapidly improved to facilitate heat dissipation, thermal shock is fully released, the heat transfer coefficient is controlled by adjusting the flow and the flow rate of water flow in the water cooling pipeline, when the temperature is reduced to 180 ℃, the water flow of the water cooling pipeline is reduced, or a water pump is directly closed, the heat transfer coefficient of the thermal barrier is reduced to facilitate heat preservation, and the temperature difference of the composite material returns to zero.
The present invention is not concerned with parts which are the same as or can be implemented using prior art techniques.
Claims (6)
1. A heating and curing method of a resin-based composite material based on a dynamic thermal barrier is characterized in that aiming at the self-heating and curing characteristics of a composite material member, a flexible thermal insulation barrier with dynamically adjustable and controllable heat transfer characteristics is applied to the periphery of the composite material and a mold, the thickness of the composite material and the temperature of each point in the surface are measured according to the chemical heat release characteristics of the resin-based composite material in the curing process, the heat transfer characteristics of the thermal insulation barrier are dynamically adjusted and controlled in the processes of temperature rising, heat preservation and temperature lowering according to an active temperature homogenization control strategy, and the active control of the temperature distribution in the thickness direction or in the surface of the.
2. The method as claimed in claim 1, wherein the flexible thermal insulation barrier body with dynamically adjustable heat transfer characteristics is made of a flexible material with an extremely low heat transfer coefficient, the flexible material is tightly coated on the surface of the vacuum bag system of the composite material member to block the heat generated by the composite material member in the flexible thermal insulation barrier, the flexible material with an extremely low heat transfer coefficient is aerogel, polyurethane foam, glass wool or composite silicate felt type thermal insulation material, and the flexible thermal insulation barrier is made of a wave-transparent material aiming at microwave curing or electromagnetic induction heating curing.
3. The method of claim 1, wherein the method of dynamically controlling the heat transfer characteristics of the thermal barrier is a method of physically applying-removing or otherwise altering the heat transfer medium within the thermal barrier by dynamically loading and removing the flexible thermal barrier using manual or automated means, and wherein the flexible thermal barrier is dynamically loaded and removed using mechanical means capable of operating normally in a high energy electromagnetic radiation field during curing using microwave and induction heating; the method for changing the heat transfer medium in the heat shield is to pass a strong cooling fluid with controllable flow speed and flow rate into the heat shield so as to improve the heat absorption and dissipation capacity of the heat shield.
4. The method of claim 3 wherein said mechanical means for dynamically loading and unloading said flexible thermal barrier means is a radiation-shielding robotic arm or gear train.
5. The method according to claim 1, wherein the composite material is spontaneously heat cured, i.e. the composite material member itself is used as a curing heating source, and the externally input electric energy is consumed to heat and cure the composite material itself, or the composite material is used to release the chemical energy stored in the composite material itself; the electric energy heating of loss external input for microwave solidification, electromagnetic induction solidification or fibre composite material self-resistance electric heat solidification, the chemical energy heating solidification for resin base front end solidification.
6. The method according to claim 1, wherein the active temperature equalization control strategy is to determine the heating rate and the maximum temperature based on the real-time measured temperature distribution, and to apply a thermal barrier with an extremely low heat transfer coefficient to achieve zero temperature difference in the thickness direction and in-plane for the self-heating stage; and for the reaction heat release impact in the thickness direction, setting an advance to trigger a dynamic evacuation procedure, evacuating the thermal barrier to expose the composite material at an open normal temperature, or introducing high-speed cooling liquid to quickly release the heat impact, for the temperature difference in the thickness direction exceeding the set threshold, setting an advance to trigger an application procedure, reapplying the thermal barrier to return the composite material to a zero temperature difference state, wherein the threshold and the advance are selected according to different materials, sizes, curing modes and process curves of the composite material.
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| PCT/CN2019/078084 WO2020155319A1 (en) | 2019-01-30 | 2019-03-14 | Method for heating curing resin-based composite material using dynamic heat shield |
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| CN111710614B (en) * | 2020-05-12 | 2022-01-11 | 中山市东翔微电子有限公司 | Oxygen-free packaging method of integrated circuit |
| CN111665456B (en) * | 2020-05-29 | 2023-02-28 | 中国南方电网有限责任公司超高压输电公司昆明局 | Control method for self safety of unmanned aerial vehicle and safety of converter station equipment |
| CN113954393B (en) * | 2021-10-20 | 2022-08-05 | 南京航空航天大学 | Method for controlling deformation of composite material component through zone heating and curing |
| CN114324460A (en) * | 2021-12-29 | 2022-04-12 | 中复神鹰(上海)科技有限公司 | Real-time detection method for curing degree of epoxy resin-based carbon fiber prepreg |
| CN114536617B (en) * | 2022-02-21 | 2023-03-21 | 昆明理工大学 | Method for improving microwave curing heating uniformity of carbon fiber composite material |
| CN114571747B (en) * | 2022-03-02 | 2024-01-16 | 哈尔滨工业大学（威海） | Forming method of pulse current solidified carbon fiber composite material |
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| FR2694906B1 (en) * | 1992-08-20 | 1994-09-23 | Acb | Press for forming a piece of composite material comprising fibrous reinforcements in a polymer matrix. |
| DE60133425T2 (en) * | 2001-08-27 | 2009-04-16 | Rick C. Friendswood Hunter | HOUSING WITH THERMAL HEAT INSULATION |
| EP1905653B1 (en) * | 2006-09-27 | 2008-12-03 | Reinz-Dichtungs-Gmbh | Thermal shield |
| WO2012030909A2 (en) * | 2010-08-31 | 2012-03-08 | Thermal Structures, Inc. | Configurations and methods for heat trace insulation |
| US20130081786A1 (en) * | 2011-06-17 | 2013-04-04 | William W. Clark | Variable thermal insulation |
| CN104139532B (en) * | 2014-06-27 | 2016-08-31 | 南京航空航天大学 | The homogeneous temperature location mode of microwave-pressure-cure composite and solidification equipment |
| CN104494027B (en) * | 2014-12-17 | 2017-04-05 | 南京航空航天大学 | Double vacuum bag microwave solidification methods of carbon fibre composite product |
| CN104827613B (en) * | 2015-05-13 | 2017-05-10 | 航天材料及工艺研究所 | Low-cost quick solidifying method for composite material |
| CN205075365U (en) * | 2015-10-13 | 2016-03-09 | 中国科学院等离子体物理研究所 | Be used for insulating vacuum -pressure impregnation heating device of large -scale superconducting coil |
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| CN207859429U (en) * | 2017-11-23 | 2018-09-14 | 深圳市浜崎科技有限公司 | Heater protecting cover |
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