CN114368168A - Jig-free epoxy resin-based carbon fiber plate forming method - Google Patents
Jig-free epoxy resin-based carbon fiber plate forming method Download PDFInfo
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- CN114368168A CN114368168A CN202111669991.9A CN202111669991A CN114368168A CN 114368168 A CN114368168 A CN 114368168A CN 202111669991 A CN202111669991 A CN 202111669991A CN 114368168 A CN114368168 A CN 114368168A
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 147
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 147
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 142
- 239000003822 epoxy resin Substances 0.000 title claims abstract description 137
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 137
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000000465 moulding Methods 0.000 claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 230000009477 glass transition Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000002955 isolation Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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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
- B29C70/345—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 matched moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention relates to a jig-free epoxy resin-based carbon fiber plate forming method, which comprises the following steps: preparing a forming device, wherein the forming device comprises an upper template and a lower template, and working surfaces are formed on the lower surface of the upper template and the upper surface of the lower template; cutting the epoxy resin-based carbon fiber prepreg according to a set size, laying the epoxy resin-based carbon fiber prepreg according to a set mode, and arranging an isolating film on the surface of the epoxy resin-based carbon fiber prepreg after laying is finished to obtain a preformed body; preheating the lower surface of the upper template and the upper surface of the lower template to a set preheating temperature, directly placing the preformed body on the upper surface of the lower template, and enabling the upper template to move downwards to a set position; and curing and molding the pre-molded body into the epoxy resin-based carbon fiber plate under the set conditions. According to the invention, a die or a jig is not required in the forming process of the epoxy resin-based carbon fiber plate, so that the production cost is greatly reduced, the defects of pinholes and the like on the surface of the formed plate can be prevented, the yield of the plate is improved, the process is simple, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of carbon fiber material forming, and particularly relates to a jig-free epoxy resin-based carbon fiber plate forming method.
Background
The carbon fiber is a microcrystalline graphite material obtained by carbonizing and graphitizing organic fiber, and the microstructure of the carbon fiber is similar to that of artificial graphite. The epoxy resin-based carbon fiber plate is one of the most important materials in the aerospace industry, wherein the carbon fibers play a role in reinforcing and bear most of load, so that the material has high tensile strength and rigidity, the epoxy resin matrix and the carbon fibers are connected together through an interface, and the matrix transmits the load to the fibers through the interface, so that the epoxy resin-based carbon fiber plate not only can play a role in excellent tensile property of the carbon fibers, but also can play a role in uniformly distributing the load and protecting the carbon fibers from being damaged by the outside, and can better highlight the excellent properties of high modulus, high strength and low density of the carbon fibers.
At present, in the forming process of epoxy resin-based carbon fiber plates, a mold or a limiting jig is required to be arranged on forming equipment for forming. However, the high-precision mold and the limiting jig are extremely high in price, and are not beneficial to volatilization of small molecules of materials in the forming process, so that the surface of the carbon fiber plate obtained by forming is likely to have a pinhole defect, and the method is particularly obvious for the thin carbon fiber plate, so that the yield of the carbon fiber plate in the production process cannot be guaranteed, the production efficiency is reduced, and the production cost is increased.
Disclosure of Invention
The invention aims to provide a jig-free epoxy resin-based carbon fiber plate forming method, which is used for solving the problems that the existing forming technology is high in production cost, easy to cause pinhole defects and the like.
In order to achieve the purpose, the invention adopts the technical scheme that:
a jig-free epoxy resin-based carbon fiber plate forming method comprises the following steps:
s1: preparing a forming device, wherein the forming device comprises an upper template and a lower template, the upper template is positioned above the lower template, the lower surface of the upper template and the upper surface of the lower template form a working surface, and the working surface is a plane;
s2: cutting the epoxy resin-based carbon fiber prepreg according to a set size, laying the epoxy resin-based carbon fiber prepreg according to a set mode, and arranging an isolating film on the surface of the epoxy resin-based carbon fiber prepreg after laying is finished to obtain a preformed body;
s3: preheating the lower surface of the upper template and the upper surface of the lower template to a set preheating temperature, directly placing the preformed body on the upper surface of the lower template, and enabling the upper template to move downwards to a set position;
s4: and curing and molding the pre-molded body into the epoxy resin-based carbon fiber plate under a set condition, and moving the upper template upwards and taking out the epoxy resin-based carbon fiber plate after molding is finished.
Preferably, in S3, the pre-heating temperature is set to 20% to 80% of the glass transition temperature of the epoxy resin.
Preferably, in S3, the set position is a position where the lower surface of the upper mold plate contacts the upper surface of the preform, and the upper mold plate does not apply any pressure to the preform.
Preferably, in S4, the setting condition includes a setting time and a setting temperature, the setting time is 45min to 90min, and the setting temperature is 80 ℃ to 170 ℃.
Further preferably, in S2, the isolation film is resistant to a temperature of 180 ℃.
Preferably, in S2, the setting is such that the layers are sequentially laid in the 0 °/90 ° direction.
Preferably, in S2, after the epoxy resin-based carbon fiber prepreg is laid in a set manner, release films are laid on both the upper surface and the lower surface of the epoxy resin-based carbon fiber prepreg.
Preferably, in S2, the set size is the size of the carbon fiber sheet to be molded.
Preferably, in S2, the epoxy resin-based carbon fiber prepreg comprises epoxy resin and carbon fiber, and the content of the epoxy resin is 27 to 45 wt%; the thickness of the epoxy resin-based carbon fiber prepreg is 0.1-0.6mm, and the thickness of the preformed body is 5-10 mm.
The invention also aims to provide an epoxy resin-based carbon fiber plate, and in order to achieve the aim, the technical scheme adopted by the invention is as follows:
the epoxy resin-based carbon fiber plate is prepared by the jig-free epoxy resin-based carbon fiber plate forming method.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the invention, the forming equipment is preheated, and the upper template of the forming equipment is moved to the set position for forming, so that a mold or a jig is not required in the forming process of the epoxy resin-based carbon fiber plate, the production cost is greatly reduced, the defects of pinholes and the like on the surface of the formed plate can be prevented, the yield of the plate is improved, the process is simple, the operation is convenient, and the production efficiency is improved.
Drawings
Fig. 1 is an appearance schematic diagram of an epoxy resin-based carbon fiber plate in the first embodiment;
fig. 2 is an appearance schematic diagram of an epoxy resin-based carbon fiber plate according to a second embodiment;
FIG. 3 is a schematic appearance diagram of an epoxy resin-based carbon fiber plate according to the first comparative example;
FIG. 4 is a schematic view of an appearance of an epoxy resin-based carbon fiber sheet according to a third comparative example;
FIG. 5 is a schematic view of an appearance of an epoxy resin-based carbon fiber sheet according to a fourth comparative example;
FIG. 6 is a schematic structural view of a molding apparatus according to the first embodiment;
FIG. 7 is a schematic structural view of a molding apparatus of the first comparative example.
In the above drawings: 1. mounting a template; 2. a lower template; 3. a preform; 4. a jig.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An epoxy resin-based carbon fiber plate is prepared by adopting a jig-free epoxy resin-based carbon fiber plate forming method. The jig-free epoxy resin-based carbon fiber plate forming method specifically comprises the following steps:
S1：
preparing a forming device, wherein the forming device comprises an upper template 1 and a lower template 2, as shown in fig. 6, the upper template 1 is located above the lower template 2, and working surfaces are formed on the lower surface of the upper template 1 and the upper surface of the lower template 2 and are planes.
S2：
Preparing an epoxy resin-based carbon fiber prepreg, wherein the epoxy resin-based carbon fiber prepreg comprises 27-45wt% of epoxy resin and 0.1-0.6mm in thickness;
cutting the epoxy resin-based carbon fiber prepreg according to a set size, wherein the set size is the size of a carbon fiber plate to be molded;
laying epoxy resin-based carbon fiber prepreg according to a set mode, wherein the set mode is that the layers are sequentially laid in the direction of 0 DEG/90 DEG;
and after the epoxy resin-based carbon fiber prepreg is laid, laying isolation films on the upper surface and the lower surface of the epoxy resin-based carbon fiber prepreg, wherein the temperature resistance of the isolation films is required to be more than or equal to 180 ℃, and obtaining a preformed body 3 after the laying is finished, wherein the thickness of the preformed body 3 is 5-10 mm.
S3：
Preheating the lower surface of the upper template 1 and the upper surface of the lower template 2 to a set preheating temperature which is 20-80% of the glass transition temperature of the epoxy resin;
the preform 3 is directly placed on the upper surface of the lower template 2 without using a mold or a jig, and the upper template 1 is moved downward to a set position, the set position being a position where the lower surface of the upper template 1 contacts the upper surface of the preform 3, and the upper template 1 does not apply any pressure to the preform 3.
S4：
Curing and molding the pre-molded body 3 into an epoxy resin-based carbon fiber plate under set conditions, wherein the set conditions comprise set time and set temperature, the set time is 45-90 min, and the set temperature is 80-170 ℃;
and after the forming is finished, the upper template 1 moves upwards, and the epoxy resin-based carbon fiber plate is taken out.
The first embodiment is as follows:
the size of the epoxy resin-based carbon fiber plate to be molded is 560mm multiplied by 560mm, the thickness of the epoxy resin-based carbon fiber plate to be molded is 8mm, and the epoxy resin-based carbon fiber plate to be molded is molded by adopting a jig-free epoxy resin-based carbon fiber plate molding method, which specifically comprises the following steps:
s1: preparing a forming device, wherein the forming device comprises an upper template 1 and a lower template 2, as shown in fig. 6, the upper template 1 is positioned above the lower template 2, and working surfaces are formed on the lower surface of the upper template 1 and the upper surface of the lower template 2 and are planes;
s2: preparing epoxy resin-based carbon fiber prepreg, wherein the epoxy resin-based carbon fiber prepreg adopts 200 g of prepreg; cutting an epoxy resin-based carbon fiber prepreg according to the size of an epoxy resin-based carbon fiber plate to be molded, sequentially laying layers in the direction of 0 DEG/90 DEG, laying 40 layers in total, laying isolation films on the upper surface and the lower surface of the epoxy resin-based carbon fiber prepreg after laying is finished, and obtaining a preformed body 3 after laying is finished;
s3: preheating the lower surface of an upper template 1 and the upper surface of a lower template 2 to 150 ℃, directly placing a preformed body 3 on the upper surface of the lower template 2 without adopting a mold or a jig, and enabling the upper template 1 to move downwards to a position where the lower surface of the upper template 1 contacts the upper surface of the preformed body 3, wherein the upper template 1 does not apply any pressure to the preformed body 3;
s4: under the conditions that the set time is 40min and the set temperature is 150 ℃, the pre-forming body 3 is cured and formed into the epoxy resin-based carbon fiber plate, the upper template 1 is moved upwards after the forming is finished, and the epoxy resin-based carbon fiber plate is taken out, wherein as shown in figure 1, the carbon fiber plate has high surface quality and does not have defects such as pinholes and the like.
Example two:
the size of the epoxy resin-based carbon fiber plate to be molded is 560mm multiplied by 600mm, the thickness of the epoxy resin-based carbon fiber plate to be molded is 10mm, and the epoxy resin-based carbon fiber plate to be molded is molded by adopting a jig-free epoxy resin-based carbon fiber plate molding method, which specifically comprises the following steps:
s1: preparing a forming device, wherein the forming device comprises an upper template 1 and a lower template 2, as shown in fig. 6, the upper template 1 is positioned above the lower template 2, and working surfaces are formed on the lower surface of the upper template 1 and the upper surface of the lower template 2 and are planes;
s2: preparing epoxy resin-based carbon fiber prepreg, wherein the epoxy resin-based carbon fiber prepreg adopts 200 g of prepreg; cutting an epoxy resin-based carbon fiber prepreg according to the size of an epoxy resin-based carbon fiber plate to be molded, sequentially laying layers in the direction of 0 DEG/90 DEG, laying 50 layers in total, laying isolation films on the upper surface and the lower surface of the epoxy resin-based carbon fiber prepreg after laying is finished, and obtaining a preformed body 3 after laying is finished;
s3: preheating the lower surface of an upper template 1 and the upper surface of a lower template 2 to 150 ℃, directly placing a preformed body 3 on the upper surface of the lower template 2 without adopting a mold or a jig, and enabling the upper template 1 to move downwards to a position where the lower surface of the upper template 1 contacts the upper surface of the preformed body 3, wherein the upper template 1 does not apply any pressure to the preformed body 3;
s4: and curing and molding the pre-molded body 3 into an epoxy resin-based carbon fiber plate under the conditions that the set time is 45min and the set temperature is 150 ℃, moving the upper template 1 upwards after molding is finished, and taking out the epoxy resin-based carbon fiber plate, wherein the carbon fiber plate has high surface quality and does not have defects such as pinholes and the like as shown in figure 2.
Comparative example one:
the size of the epoxy resin-based carbon fiber plate to be molded is 560mm multiplied by 560mm, the thickness of the epoxy resin-based carbon fiber plate to be molded is 8mm, the epoxy resin-based carbon fiber plate to be molded is molded by adopting a traditional epoxy resin-based carbon fiber plate molding method, a jig is used in the molding process, and the method specifically comprises the following steps:
s1: preparing a molding device, wherein the molding device comprises an upper template 1, a lower template 2 and a jig 4, as shown in fig. 7, the upper template 1 is positioned above the lower template 2, and the jig 4 is arranged on the lower template 2;
s2: preparing epoxy resin-based carbon fiber prepreg, wherein the epoxy resin-based carbon fiber prepreg adopts 200 g of prepreg; cutting an epoxy resin-based carbon fiber prepreg according to the size of an epoxy resin-based carbon fiber plate to be molded, sequentially laying layers in the direction of 0 DEG/90 DEG, laying 40 layers in total, laying isolation films on the upper surface and the lower surface of the epoxy resin-based carbon fiber prepreg after laying is finished, and obtaining a preformed body 3 after laying is finished;
s3: placing the preformed body 3 in a jig 4, moving the upper template 1 downwards to press the preformed body 3, curing and molding the preformed body 3 into an epoxy resin-based carbon fiber plate under the conditions of the set pressure of 100kgf, the set time of 40min and the set temperature of 150 ℃, moving the upper template 1 upwards after molding, and taking out the epoxy resin-based carbon fiber plate, wherein as shown in fig. 3, the surface of the carbon fiber plate has a pinhole defect.
Comparative example two:
the size of the epoxy resin-based carbon fiber plate to be molded is 560mm multiplied by 560mm, the thickness of the epoxy resin-based carbon fiber plate to be molded is 8mm, the epoxy resin-based carbon fiber plate to be molded is molded by adopting a jig-free epoxy resin-based carbon fiber plate molding method, but in the molding process, the preheating temperature is set to be lower than 20% of the glass transition temperature of the epoxy resin, and the method specifically comprises the following steps:
s1: preparing a forming device, wherein the forming device comprises an upper template 1 and a lower template 2, as shown in fig. 6, the upper template 1 is positioned above the lower template 2, and working surfaces are formed on the lower surface of the upper template 1 and the upper surface of the lower template 2 and are planes;
s2: preparing epoxy resin-based carbon fiber prepreg, wherein the epoxy resin-based carbon fiber prepreg adopts 200 g of prepreg; cutting an epoxy resin-based carbon fiber prepreg according to the size of an epoxy resin-based carbon fiber plate to be molded, sequentially laying layers in the direction of 0 DEG/90 DEG, laying 40 layers in total, laying isolation films on the upper surface and the lower surface of the epoxy resin-based carbon fiber prepreg after laying is finished, and obtaining a preformed body 3 after laying is finished;
s3: preheating the lower surface of an upper template 1 and the upper surface of a lower template 2 to 90 ℃, directly placing a preformed body 3 on the upper surface of the lower template 2 without adopting a mold or a jig, and enabling the upper template 1 to move downwards to a position where the lower surface of the upper template 1 contacts the upper surface of the preformed body 3, wherein the upper template 1 does not apply any pressure to the preformed body 3;
s4: the pre-form 3 is waited for solidification and molding under the conditions of the set time of 45min and the set temperature of 90 ℃, and the upper template 1 is moved upwards after the set conditions are achieved, but the pre-form 3 cannot be molded into a plate due to the low temperature.
Comparative example three:
the size of the epoxy resin-based carbon fiber plate to be molded is 560mm multiplied by 560mm, the thickness of the epoxy resin-based carbon fiber plate to be molded is 8mm, the epoxy resin-based carbon fiber plate to be molded is molded by adopting a jig-free epoxy resin-based carbon fiber plate molding method, but in the molding process, the preheating temperature is set to be higher than 80% of the glass transition temperature of the epoxy resin, and the method specifically comprises the following steps:
s1: preparing a forming device, wherein the forming device comprises an upper template 1 and a lower template 2, as shown in fig. 6, the upper template 1 is positioned above the lower template 2, and working surfaces are formed on the lower surface of the upper template 1 and the upper surface of the lower template 2 and are planes;
s2: preparing epoxy resin-based carbon fiber prepreg, wherein the epoxy resin-based carbon fiber prepreg adopts 200 g of prepreg; cutting an epoxy resin-based carbon fiber prepreg according to the size of an epoxy resin-based carbon fiber plate to be molded, sequentially laying layers in the direction of 0 DEG/90 DEG, laying 40 layers in total, laying isolation films on the upper surface and the lower surface of the epoxy resin-based carbon fiber prepreg after laying is finished, and obtaining a preformed body 3 after laying is finished;
s3: preheating the lower surface of an upper template 1 and the upper surface of a lower template 2 to 170 ℃, directly placing a preformed body 3 on the upper surface of the lower template 2 without adopting a mold or a jig, and enabling the upper template 1 to move downwards to a position where the lower surface of the upper template 1 contacts the upper surface of the preformed body 3, wherein the upper template 1 does not apply any pressure on the preformed body 3;
s4: and curing and molding the pre-molded body 3 into an epoxy resin-based carbon fiber plate under the conditions that the set time is 45min and the set temperature is 170 ℃, moving the upper template 1 upwards after molding is finished, and taking out the epoxy resin-based carbon fiber plate, wherein defects appear on the surface of the carbon fiber plate as shown in fig. 4.
Comparative example four:
the size of the epoxy resin-based carbon fiber plate to be molded is 560mm multiplied by 560mm, the thickness of the epoxy resin-based carbon fiber plate to be molded is 8mm, the epoxy resin-based carbon fiber plate to be molded is molded by adopting a jig-free epoxy resin-based carbon fiber plate molding method, but in the molding process, the upper template 1 does not move to a set position, and the method specifically comprises the following steps:
s1: preparing a forming device, wherein the forming device comprises an upper template 1 and a lower template 2, as shown in fig. 6, the upper template 1 is positioned above the lower template 2, and working surfaces are formed on the lower surface of the upper template 1 and the upper surface of the lower template 2 and are planes;
s2: preparing epoxy resin-based carbon fiber prepreg, wherein the epoxy resin-based carbon fiber prepreg adopts 200 g of prepreg; cutting an epoxy resin-based carbon fiber prepreg according to the size of an epoxy resin-based carbon fiber plate to be molded, sequentially laying layers in the direction of 0 DEG/90 DEG, laying 40 layers in total, laying isolation films on the upper surface and the lower surface of the epoxy resin-based carbon fiber prepreg after laying is finished, and obtaining a preformed body 3 after laying is finished;
s3: preheating the lower surface of an upper template 1 and the upper surface of a lower template 2 to 150 ℃, directly placing a pre-forming body 3 on the upper surface of the lower template 2, enabling the upper template 1 to move downwards without adopting a die or a jig, and enabling the lower surface of the upper template 1 to tightly press the upper surface of the pre-forming body 3, wherein the pressure is 50 kgf;
s4: and curing and molding the pre-molded body 3 into an epoxy resin-based carbon fiber plate under the conditions that the set time is 45min and the set temperature is 150 ℃, moving the upper template 1 upwards after molding is finished, and taking out the epoxy resin-based carbon fiber plate, wherein the surface of the carbon fiber plate has a disorder defect as shown in figure 5.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A jig-free epoxy resin-based carbon fiber plate forming method is characterized by comprising the following steps: the method comprises the following steps:
s1: preparing a forming device, wherein the forming device comprises an upper template and a lower template, the upper template is positioned above the lower template, the lower surface of the upper template and the upper surface of the lower template form a working surface, and the working surface is a plane;
s2: cutting the epoxy resin-based carbon fiber prepreg according to a set size, laying the epoxy resin-based carbon fiber prepreg according to a set mode, and arranging an isolating film on the surface of the epoxy resin-based carbon fiber prepreg after laying is finished to obtain a preformed body;
s3: preheating the lower surface of the upper template and the upper surface of the lower template to a set preheating temperature, directly placing the preformed body on the upper surface of the lower template, and enabling the upper template to move downwards to a set position;
s4: and curing and molding the pre-molded body into the epoxy resin-based carbon fiber plate under a set condition, and moving the upper template upwards and taking out the epoxy resin-based carbon fiber plate after molding is finished.
2. The jig-free epoxy resin-based carbon fiber plate forming method according to claim 1, characterized in that: in S3, the pre-heating temperature is set to 20% to 80% of the glass transition temperature of the epoxy resin.
3. The jig-free epoxy resin-based carbon fiber plate forming method according to claim 1, characterized in that: in S3, the set position is a position where the lower surface of the upper mold plate contacts the upper surface of the preform, and the upper mold plate does not apply any pressure to the preform.
4. The jig-free epoxy resin-based carbon fiber plate forming method according to claim 1, characterized in that: in S4, the setting condition includes a setting time and a setting temperature, the setting time is 45min to 90min, and the setting temperature is 80 ℃ to 170 ℃.
5. The jig-free epoxy resin-based carbon fiber plate forming method according to claim 4, wherein: in S2, the separator is resistant to temperatures greater than or equal to 180 ℃.
6. The jig-free epoxy resin-based carbon fiber plate forming method according to claim 1, characterized in that: in S2, the layers are sequentially laid in the 0 °/90 ° direction.
7. The jig-free epoxy resin-based carbon fiber plate forming method according to claim 1, characterized in that: in S2, the epoxy resin-based carbon fiber prepreg is laid in a predetermined manner, and then release films are laid on both the upper surface and the lower surface thereof.
8. The jig-free epoxy resin-based carbon fiber plate forming method according to claim 1, characterized in that: in S2, the set size is the size of the carbon fiber sheet to be formed.
9. The jig-free epoxy resin-based carbon fiber plate forming method according to claim 1, characterized in that: in S2, the epoxy resin-based carbon fiber prepreg comprises epoxy resin and carbon fiber, wherein the content of the epoxy resin is 27-45 wt%; the thickness of the epoxy resin-based carbon fiber prepreg is 0.1-0.6mm, and the thickness of the preformed body is 5-10 mm.
10. An epoxy resin-based carbon fiber plate is characterized in that: the plate is prepared by the jig-free epoxy resin-based carbon fiber plate forming method of any one of claims 1 to 9.
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| CN105584057A (en) * | 2014-10-21 | 2016-05-18 | 中国石油化工股份有限公司 | Carbon fiber/epoxy resin prepreg autoclave molding method |
| CN106273536A (en) * | 2016-08-16 | 2017-01-04 | 中国商用飞机有限责任公司 | The microwave curing manufacturing process of carbon fiber/epoxy resin composite material and laminate thereof |
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| CN112629324A (en) * | 2020-11-12 | 2021-04-09 | 湖南欧亚碳纤维复合材料有限公司 | Carbon fiber composite bulletproof plate and preparation process thereof |
| CN214639698U (en) * | 2021-01-26 | 2021-11-09 | 苏州森德泰克智能科技有限公司 | Pressing machine of thermal appliance |
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- 2021-12-31 CN CN202111669991.9A patent/CN114368168A/en active Pending
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| CN105584057A (en) * | 2014-10-21 | 2016-05-18 | 中国石油化工股份有限公司 | Carbon fiber/epoxy resin prepreg autoclave molding method |
| CN205905426U (en) * | 2016-08-01 | 2017-01-25 | 瑞宏精密电子（太仓）有限公司 | Hot pressing tool of laptop shell processing usefulness with control by temperature change water route |
| CN106273536A (en) * | 2016-08-16 | 2017-01-04 | 中国商用飞机有限责任公司 | The microwave curing manufacturing process of carbon fiber/epoxy resin composite material and laminate thereof |
| CN112223784A (en) * | 2020-09-25 | 2021-01-15 | 上海市富力达科技股份有限公司 | Carbon fiber epoxy resin sheet and preparation method thereof |
| CN112629324A (en) * | 2020-11-12 | 2021-04-09 | 湖南欧亚碳纤维复合材料有限公司 | Carbon fiber composite bulletproof plate and preparation process thereof |
| CN214639698U (en) * | 2021-01-26 | 2021-11-09 | 苏州森德泰克智能科技有限公司 | Pressing machine of thermal appliance |
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