CN117024674A - Reusable inner mold material suitable for carbon fiber special-shaped piece - Google Patents
Reusable inner mold material suitable for carbon fiber special-shaped piece Download PDFInfo
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- CN117024674A CN117024674A CN202310988693.9A CN202310988693A CN117024674A CN 117024674 A CN117024674 A CN 117024674A CN 202310988693 A CN202310988693 A CN 202310988693A CN 117024674 A CN117024674 A CN 117024674A
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- Prior art keywords
- carbon fiber
- fiber composite
- shaped piece
- special
- parts
- Prior art date
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- Pending
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 118
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 118
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 239000000463 material Substances 0.000 title claims abstract description 47
- 239000002131 composite material Substances 0.000 claims abstract description 86
- -1 glycol ester Chemical class 0.000 claims abstract description 43
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 35
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 25
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 9
- 239000003085 diluting agent Substances 0.000 claims abstract description 7
- 230000001788 irregular Effects 0.000 claims description 33
- 238000003756 stirring Methods 0.000 claims description 21
- 229920002121 Hydroxyl-terminated polybutadiene Polymers 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 19
- 125000005442 diisocyanate group Chemical group 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 16
- 239000004744 fabric Substances 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000003112 inhibitor Substances 0.000 claims description 8
- 238000006116 polymerization reaction Methods 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 7
- FXIVKZGDYRLHKF-UHFFFAOYSA-N C(C)OP(OC(C1=C(C=C(C=C1C)C)C)=O)(=O)C1=CC=CC=C1 Chemical compound C(C)OP(OC(C1=C(C=C(C=C1C)C)C)=O)(=O)C1=CC=CC=C1 FXIVKZGDYRLHKF-UHFFFAOYSA-N 0.000 claims description 6
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 6
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 claims description 6
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 6
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 claims description 6
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 6
- 230000007480 spreading Effects 0.000 claims description 6
- AZIQALWHRUQPHV-UHFFFAOYSA-N prop-2-eneperoxoic acid Chemical compound OOC(=O)C=C AZIQALWHRUQPHV-UHFFFAOYSA-N 0.000 claims description 5
- IAXXETNIOYFMLW-COPLHBTASA-N [(1s,3s,4s)-4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl] 2-methylprop-2-enoate Chemical compound C1C[C@]2(C)[C@@H](OC(=O)C(=C)C)C[C@H]1C2(C)C IAXXETNIOYFMLW-COPLHBTASA-N 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 229940119545 isobornyl methacrylate Drugs 0.000 claims description 4
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 claims description 3
- NNQPQJLMERNWGN-UHFFFAOYSA-N 11-methyldodecyl prop-2-enoate Chemical compound CC(C)CCCCCCCCCCOC(=O)C=C NNQPQJLMERNWGN-UHFFFAOYSA-N 0.000 claims description 3
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 claims description 3
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 3
- CEXQWAAGPPNOQF-UHFFFAOYSA-N 2-phenoxyethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOC1=CC=CC=C1 CEXQWAAGPPNOQF-UHFFFAOYSA-N 0.000 claims description 3
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 3
- 244000028419 Styrax benzoin Species 0.000 claims description 3
- 235000000126 Styrax benzoin Nutrition 0.000 claims description 3
- 235000008411 Sumatra benzointree Nutrition 0.000 claims description 3
- GUCYFKSBFREPBC-UHFFFAOYSA-N [phenyl-(2,4,6-trimethylbenzoyl)phosphoryl]-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C(=O)C1=C(C)C=C(C)C=C1C GUCYFKSBFREPBC-UHFFFAOYSA-N 0.000 claims description 3
- 229960002130 benzoin Drugs 0.000 claims description 3
- 235000019382 gum benzoic Nutrition 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims description 2
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 claims description 2
- WJFKNYWRSNBZNX-UHFFFAOYSA-N 10H-phenothiazine Chemical compound C1=CC=C2NC3=CC=CC=C3SC2=C1 WJFKNYWRSNBZNX-UHFFFAOYSA-N 0.000 claims description 2
- GNSFRPWPOGYVLO-UHFFFAOYSA-N 3-hydroxypropyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCO GNSFRPWPOGYVLO-UHFFFAOYSA-N 0.000 claims description 2
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims description 2
- JIGUICYYOYEXFS-UHFFFAOYSA-N 3-tert-butylbenzene-1,2-diol Chemical compound CC(C)(C)C1=CC=CC(O)=C1O JIGUICYYOYEXFS-UHFFFAOYSA-N 0.000 claims description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 2
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 2
- KXBFLNPZHXDQLV-UHFFFAOYSA-N [cyclohexyl(diisocyanato)methyl]cyclohexane Chemical compound C1CCCCC1C(N=C=O)(N=C=O)C1CCCCC1 KXBFLNPZHXDQLV-UHFFFAOYSA-N 0.000 claims description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 2
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 claims description 2
- 229950000688 phenothiazine Drugs 0.000 claims description 2
- WZESLRDFSNLECD-UHFFFAOYSA-N phenyl prop-2-eneperoxoate Chemical compound C=CC(=O)OOC1=CC=CC=C1 WZESLRDFSNLECD-UHFFFAOYSA-N 0.000 claims description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims 1
- JRWNODXPDGNUPO-UHFFFAOYSA-N oxolane;prop-2-enoic acid Chemical compound C1CCOC1.OC(=O)C=C JRWNODXPDGNUPO-UHFFFAOYSA-N 0.000 claims 1
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 239000011159 matrix material Substances 0.000 abstract description 7
- 229920005989 resin Polymers 0.000 abstract description 7
- 239000011347 resin Substances 0.000 abstract description 7
- 239000004593 Epoxy Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 14
- 239000004677 Nylon Substances 0.000 description 13
- 229920001778 nylon Polymers 0.000 description 13
- 239000000047 product Substances 0.000 description 7
- 239000003822 epoxy resin Substances 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 150000002009 diols Chemical class 0.000 description 5
- 238000003618 dip coating Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 3
- 238000005481 NMR spectroscopy Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- FZHFLPZIOJBRGW-UHFFFAOYSA-N 3-(oxolan-2-yl)prop-2-enoic acid Chemical compound OC(=O)C=CC1CCCO1 FZHFLPZIOJBRGW-UHFFFAOYSA-N 0.000 description 2
- 206010066054 Dysmorphism Diseases 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- KWVGIHKZDCUPEU-UHFFFAOYSA-N 2,2-dimethoxy-2-phenylacetophenone Chemical compound C=1C=CC=CC=1C(OC)(OC)C(=O)C1=CC=CC=C1 KWVGIHKZDCUPEU-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012761 high-performance material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N urethane group Chemical group NC(=O)OCC JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/04—Polymers provided for in subclasses C08C or C08F
- C08F290/048—Polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/40—Plastics, e.g. foam or rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Abstract
The invention discloses a reusable inner die material suitable for a carbon fiber special-shaped piece. The die material of the carbon fiber special-shaped piece comprises the following components: 45-60 parts of acrylic polybutadiene glycol ester, 35-45 parts of acrylic ester reactive diluent, 2-5 parts of photoinitiator and 0.2-2.0 parts of fumed silica. The carbon fiber special-shaped piece die material is obtained by ultraviolet curing reaction of the mixture. After ultraviolet light curing, the mold material has good enough flexibility, is incompatible with the epoxy matrix resin of the carbon fiber composite material, has poor interface bonding, can be easily and completely peeled from the inside of the carbon fiber composite material special-shaped piece by means of ethanol and external force, can be reused, and can further reduce the weight of the carbon fiber composite material special-shaped piece.
Description
Technical Field
The invention particularly relates to the technical field of carbon fiber composite materials, in particular to a reusable internal mold material suitable for carbon fiber special-shaped pieces, and particularly relates to the weight reduction of the carbon fiber composite material special-shaped pieces, which is suitable for the technical field of high-performance carbon fiber special-shaped piece forming.
Background
The carbon fiber is a high-performance material with high strength, low density, good thermal shock resistance and low thermal expansion coefficient, and can be compounded with matrix resin such as epoxy resin to obtain a composite material with excellent comprehensive performance, and the composite material is widely applied to the fields of aerospace, weapon equipment shells, high-performance motor vehicle accessories, driving shafts and the like. At present, the main forming process of the carbon fiber composite material comprises the following steps: injection molding, vacuum diversion, pressure tank, compression molding and other processes. The carbon fiber composite material part prepared by the molding process is mostly a rod, a rod or a tubular product with a simple structure and easy demolding and is a technical bottleneck for preparing the carbon fiber composite material special-shaped part with a complex structure. In order to obtain the carbon fiber special-shaped piece with a complex structure, a nylon bag is usually selected as an inner mold material. The nylon material has the characteristics of good heat resistance (melting point 260 ℃) and high strength (tensile strength is more than 60 MPa), air with certain pressure is filled in the nylon bag, and the appearance of the nylon bag can be adjusted according to the requirements of the carbon fiber composite material sample. In the curing process of the matrix resin of the carbon fiber composite material according to a preset process (for example, 90 ℃ multiplied by 30min+110 ℃ multiplied by 60 min), the air in the nylon bag is heated and expanded to further squeeze the carbon fiber and the matrix resin, so that the carbon fiber composite material and the die can be better attached, and the shape of the profile can be maintained. When the temperature is reduced to room temperature, the nylon bag is sheared to release the gas in the bag, and the carbon fiber composite special-shaped piece with the inside being a cavity and stable size and high strength is obtained.
The nylon molecular structure contains a large amount of amide bonds, and does not further react with epoxy groups or hydroxyl groups of the epoxy resin, and the nylon molecular structure and the epoxy resin are incompatible in physical property. In theory, nylon is peelable from the cured epoxy substrate. However, nylon is in a glassy state at room temperature, and is characterized by being a hard plastic with high strength and low strain, and because of small deformation and high strength, the nylon cannot be completely and thoroughly taken out from the inner cavity of the cured carbon fiber composite special-shaped piece, so that the weight of the single piece of the carbon fiber composite is difficult to further reduce. Meanwhile, after the carbon fiber special-shaped piece is molded, the nylon inner mold is damaged and cannot be reused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a reusable inner die material suitable for a carbon fiber special-shaped piece. The internal mold material can be completely and thoroughly stripped from the edge and the inside of the solidified carbon fiber composite material special-shaped piece by means of solvent or external force; the weight of the carbon fiber special-shaped piece can be further reduced; but also can be reused.
In order to achieve the above object, the technical scheme of the present invention is as follows:
reusable inner die material suitable for carbon fiber special-shaped pieces comprises the following components in parts by weight:
45-60 parts of acrylic polybutadiene diol ester,
35-45 parts of acrylic ester reactive diluent,
2-5 parts of photoinitiator;
0.2-2.0 parts of fumed silica;
wherein the molecular formula of the acrylic polybutadiene diol ester is shown as follows,
R 1 is H or CH 3 ，
R 2 Is H or CH 3 ,
n is a positive integer, and n is more than or equal to 46 and less than or equal to 92;
and, the acrylic polybutadiene diol ester is prepared according to the following method, the steps are as follows:
(1) Adding dibutyl tin dilaurate and diisocyanate into hydroxyl-terminated polybutadiene under stirring, heating to 70-85 ℃, and reacting for 2-3.5h;
(2) Sequentially adding hydroxy acrylic ester and polymerization inhibitor at 70-85 ℃, reacting for 3-4h, cooling to below 45 ℃, and filtering to obtain acrylic polybutadiene diol ester;
wherein the structural formula of the hydroxyl-terminated polybutadiene isN is more than or equal to 46 and less than or equal to 92, and the number average molecular weight is 2.5X10 3 g/mol～5.0×10 3 g/mol (hydroxyl value 0.40-0.80 mmol/g);
the diisocyanate is at least one of isophorone diisocyanate, toluene diisocyanate, dicyclohexylmethane diisocyanate and hexamethylene diisocyanate,
the hydroxy acrylic ester is at least one of hydroxy ethyl acrylate, hydroxy propyl acrylate, hydroxy ethyl methacrylate and hydroxy propyl methacrylate,
the polymerization inhibitor is at least one of hydroquinone, p-hydroxyanisole, benzoquinone, tert-butyl catechol and phenothiazine;
the molar ratio of hydroxyl-terminated polybutadiene, hydroxyl acrylate and diisocyanate is 1:2:2, the dosage of the dibutyl tin dilaurate is 0.05-0.1% of the total mass of the hydroxyl-terminated polybutadiene and the diisocyanate, and the dosage of the polymerization inhibitor is 0.005-0.02% of the total mass of the hydroxyl-terminated polybutadiene, the diisocyanate and the hydroxy acrylic ester.
Preferably, the acrylic ester reactive diluent is at least one of isobornyl acrylate, isobornyl methacrylate, isotridecyl acrylate, 2-phenoxyvinyl acrylate, 2-phenoxyethyl methacrylate, phenoxyacrylate and tetrahydrofuranacrylate.
Preferably, the photoinitiator is at least one of ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, alpha-dimethoxy-alpha-phenylacetophenone and benzoin dimethyl ether.
The application method of the die material of the carbon fiber special-shaped piece comprises the following steps:
(1) At room temperature, according to parts by weight, adding 35-45 parts of acrylic ester reactive diluent slowly into 45-60 parts of acrylic polybutadiene dihydric alcohol ester, and stirring uniformly;
(2) Adding 2-5 parts of photoinitiator according to parts by weight, and uniformly stirring at 45-50 ℃; then cooling to room temperature, adding 0.2-2.0 parts of fumed silica, stirring, and vacuumizing to ensure that the vacuum degree is less than or equal to minus 0.095mPa and the temperature is less than or equal to 35 ℃ to obtain a die material;
(3) Uniformly attaching a layer of die material with the thickness of 250-350 mu m on the surface of the solidified water-soluble sand die through dip coating, and solidifying under the irradiation condition of an ultraviolet lamp (with the wavelength of 355nm and 395 nm) to obtain the special-shaped part inner die;
(4) Spreading carbon fiber cloth on the surface of an inner die of the special-shaped piece to obtain an uncured carbon fiber composite material special-shaped piece blank, putting the uncured carbon fiber composite material special-shaped piece blank into a steel die sprayed with a release agent, and heating and pressurizing the steel die by a vulcanizing press to mold;
(5) Taking out the solidified and formed carbon fiber composite material irregular part, dissolving out the sand mould, wiping the edge of the cavity of the carbon fiber composite material irregular part by using cotton cloth dipped with alcohol, separating the irregular part inner mould from the edge of the carbon fiber composite material irregular part, clamping the stripped inner mould by using forceps, and taking out the carbon fiber composite material irregular part from the inside of the carbon fiber composite material irregular part;
(6) The taken-out special-shaped piece internal mold can be reused.
The beneficial effects are that:
after ultraviolet light curing, the inner mold has good enough flexibility, is incompatible with the epoxy matrix resin of the carbon fiber composite material, has poor interface bonding, and can be easily and completely peeled from the inside of the carbon fiber composite material special-shaped piece by means of ethanol and external force.
Therefore, the die material can be reused, and the weight of the carbon fiber composite special-shaped piece can be further reduced.
(1) The prepared internal mold can be thoroughly removed. The main component of the internal mold material is polybutadiene with low modulus and high elasticity, is incompatible with matrix resin epoxy resin of the carbon fiber composite material, can be completely and thoroughly peeled off from a carbon fiber composite material special-shaped piece under the action of external force or ethanol, and removes the prepared internal mold from the inside of the special-shaped piece, so that the weight of the special-shaped piece is further reduced; and (2) reusing the prepared internal mold. The internal mold material is of a three-dimensional cross-linked network structure with certain strength, sand and polymer can be added into the internal mold material to prepare the carbon fiber composite material again, and the internal mold material is used for forming the carbon fiber composite material irregular part; (3) demolding. Since the main chemical component of the inner mold material is polybutadiene (typical nonpolar compound) which is incompatible with the matrix resin epoxy resin (typical polar material) of the carbon fiber composite material, the prepared inner mold and the molded carbon fiber special-shaped piece can be peeled off and removed under the condition that a release agent is not used. The prepared internal mold has the function of a release agent, so that the construction process is simplified, and pollution caused by the use of the release agent is avoided. And (4) the applicability is wide. The internal mold material of the uncrosslinked carbon fiber composite material special-shaped piece is liquid, can be coated on the surface of a mold with a particularly complex shape, and can be cured after ultraviolet irradiation to obtain the internal mold capable of being recycled for multiple times. Therefore, the method can be applied to an internal mold for preparing the carbon fiber composite material special-shaped piece with a complex shape. (5) high precision. Under the heating condition, the polybutadiene material gradually becomes expanded and hard from soft, so that the carbon fiber cloth is tightly attached to the inner mold, and the processing precision and mechanical property of the carbon fiber special-shaped piece are improved.
Drawings
FIG. 1 shows the nuclear magnetic resonance hydrogen spectrum of polybutadiene diol acrylate of example 1.
FIG. 2 is an infrared spectrum of the acrylic polybutadiene diol esters obtained in example 2 and example 4.
Fig. 3. Tensile strength of example 1 and example 4.
Fig. 4. Example 1 inner mold of the obtained shaped structure was peeled off. (a) top view, (b) side view.
Fig. 5. The number of times of reuse of example 1 and example 4.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The polybutadiene diol acrylate in the examples was prepared as follows:
(1) Adding hydroxyl-terminated polybutadiene and diisocyanate into a reaction kettle according to a molar ratio of 1:2, adding a dibutyltin dilaurate catalyst accounting for 0.05-0.1% of the total mass of the hydroxyl-terminated polybutadiene and the diisocyanate under the condition of stirring, heating to 70-85 ℃, and reacting for 2-3.5h;
wherein the structural formula of the hydroxyl-terminated polybutadiene isN is more than or equal to 46 and less than or equal to 92, is a product of Tianyuan aviation materials and technology, and has the number average molecular weight of 2.5 multiplied by 10 3 g/mol～5.0×10 3 g/mol, preferably 2.5X10 3 g/mol、3.3×10 3 g/mol、4.0×10 3 g/mol and 5.0X10 3 g/mol；
(2) At 70-85 ℃, hydroxyl acrylic ester with the same molar weight as diisocyanate and polymerization inhibitor with the total mass of 0.005-0.02% of all raw materials (hydroxyl-terminated polybutadiene, diisocyanate and hydroxyl acrylic ester) in a reaction kettle are sequentially added for reaction for 3-4h. Cooling to below 45 ℃, and filtering to obtain the acrylic polybutadiene diol ester.
Wherein, the preparation method of the acrylic polybutadiene diol ester used in the example 1 comprises the following steps:
(1) 100.00g (0.04 mol) of polybutadiene diol (number average molecular weight M) are introduced into a reaction vessel at room temperature n ＝2.5×10 3 g/mol) and 17.78g (0.08 mol) isophorone diisocyanate. 0.06g of dibutyltin dilaurate was added. Heating to 70 DEG CReacting for 3.5h;
(2) 9.28g (0.08 mol) of hydroxyethyl acrylate and 6.4mg of hydroquinone were added at 70℃and reacted for 4h. Cooling to below 45 ℃, and filtering to obtain the acrylic polybutadiene diol ester.
The preparation of one or more of the acrylic polybutadiene diol esters in other examples is the same as that described above, and is not repeated herein, but the diisocyanate feed amount, the optional types and the quality of the catalyst and the polymerization inhibitor are appropriately adjusted according to the molecular weight of the hydroxyl-terminated polybutadiene, one or more of the corresponding acrylic polybutadiene diol esters can be obtained according to the reaction process, the molecular formula of which is shown as formula (1),
R 1 、R 2 =h or CH 3 (R 1 And R is R 2 May be the same or different), n is a positive integer, and n is 46-92.
The structure of the polybutadiene acrylate diol ester used in example 1 was characterized by nuclear magnetic resonance hydrogen spectroscopy, and the results are shown in FIG. 1. The absorption peak of the product at a chemical shift of 7.5ppm is attributed to the hydrogen proton (c) absorption peak on the carbamate; the absorption peak at the chemical shift of 5.7 to 6.5ppm is assigned to the hydrogen proton (b) absorption peak on the carbon-carbon double bond; the absorption peak at chemical shift 4.0ppm is the proton absorption peak of methylene (a) of the urethane-diol linkage; the absorption peaks at chemical shifts of 0.7 to 1.4ppm are proton absorption peaks on the aliphatic ring and hydrogen proton peaks of methylene groups of the repeating units in the diol. In addition, the peaks (e, f) of the product at chemical shifts 4.3 to 4.4ppm are proton absorption peaks on methylene groups attached to acryloyloxy groups. The information given above for nuclear magnetic resonance spectroscopy indicates that the target product has been successfully synthesized.
The structure of the acrylic polybutadiene diol esters used in examples 2-4 was characterized by a fourier infrared spectrometer and the results are shown in fig. 2. At 1632cm -1 Carbon-carbon double bond (c=c) stretching vibration of acrylic esterDynamic peak sum 1452cm -1 In hydroxy acrylates (CH) 2 ) Indicating that the hydroxy acrylate has been grafted to the polybutadiene diol acrylate backbone. Meanwhile, 3372cm of the reaction product -1 There appears a stretching vibration absorption peak (-NH) in carbamate at 1726cm -1 There appears an absorption peak of carbamate (-C=O), 1243cm -1 、1127cm -1 The position is the telescopic vibration absorption peak (-COO-) in the urethane group. In addition, at 2264cm -1 The disappearance of the absorption peak at the point (which is the characteristic absorption peak of-NCO in the raw material) indicates that the-NCO groups in the raw material diisocyanate are reacted to obtain the target product.
Example 1
The preparation method is suitable for the inner mold material of the carbon fiber special-shaped piece, the preparation of the inner mold and the detachment of the inner mold, and comprises the following steps:
(1) 60 parts of acrylic polybutadiene diol ester is added into a loading reaction kettle at room temperature; then, slowly adding 35 parts of isobornyl acrylate, and stirring for 30min;
(2) Adding 4.8 parts of initiator ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate, heating to 45-50 ℃ and stirring for 30min; then cooling to 35 ℃, adding 0.2 part of fumed silica, stirring and vacuumizing for 30min (the vacuum degree is-0.095 mPa, the temperature is 35 ℃) to obtain the strippable carbon fiber composite special-shaped part inner mold material;
(3) Uniformly attaching a layer of internal mold material with the thickness of about 300 mu m on the surface of the solidified water-soluble sand mold through a dip coating process, and solidifying for 20 seconds under the irradiation condition of an ultraviolet lamp (the wavelength is 355nm and 395 nm) to obtain a carbon fiber composite material special-shaped piece mold;
(4) Spreading carbon fiber cloth on the surface of a die to obtain an uncured carbon fiber composite material abnormal-shaped piece blank, placing the uncured blank into a steel die sprayed with a release agent, and heating and pressurizing the steel die by using a vulcanizing press (the curing process is 90 ℃ multiplied by 30min+110 ℃ multiplied by 60min, and the apparent pressure is more than or equal to 5 MPa);
(5) And demolding, taking out the solidified and molded carbon fiber composite material irregular part and the sand dissolving mold, wiping the edge of the cavity of the carbon fiber composite material irregular part by using cotton cloth dipped with alcohol, separating the inner mold from the edge of the carbon fiber composite material irregular part, clamping the stripped inner mold by using tweezers, and taking the stripped inner mold out of the carbon fiber composite material irregular part to obtain the reusable carbon fiber composite material irregular part inner mold.
As illustrated in fig. 4 (inner mold tool for stripping carbon fiber composite profile): the special-shaped piece inner die with smaller opening part diameter and larger closed section diameter can be completely and thoroughly stripped from the carbon fiber special-shaped piece, the problem that the existing nylon inner die cannot be taken out from the inner cavity of the solidified carbon fiber composite special-shaped piece after the carbon fiber special-shaped piece is formed is solved, the weight of a single piece of the carbon fiber composite special-shaped piece is reduced, and the special-shaped piece can be reused.
Example 2
The preparation method is suitable for the inner mold material of the carbon fiber special-shaped piece, the preparation of the inner mold and the detachment of the inner mold, and comprises the following steps:
(1) 45 parts of a polybutadiene diol acrylate (molecular weight of hydroxyl-terminated polybutadiene diol: 5.0X10) were charged into a loading reactor at room temperature 3 g/mol); then, slowly adding 45 parts of isobornyl methacrylate, and stirring for 30min;
(2) 1 part of ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate and 4 parts of phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide are added, the stirring temperature is raised to 45-50 ℃, and stirring is carried out for 30min; then cooling to 35 ℃, adding 2 parts of fumed silica, stirring and vacuumizing for 30min (the vacuum degree is-0.095 mPa, the temperature is 35 ℃) to obtain the strippable carbon fiber composite special-shaped part inner mold material;
(3) Uniformly attaching a layer of internal mold material with the thickness of about 300 mu m on the surface of the solidified water-soluble sand mold through a dip coating process, and solidifying for 20 seconds under the irradiation condition of an ultraviolet lamp (the wavelength is 355nm and 395 nm) to obtain a carbon fiber composite material special-shaped piece mold;
(4) Spreading carbon fiber cloth on the surface of a die to obtain an uncured carbon fiber composite material abnormal-shaped piece blank, placing the uncured blank into a steel die sprayed with a release agent, and heating and pressurizing the steel die by using a vulcanizing press (the curing process is 90 ℃ multiplied by 30min+110 ℃ multiplied by 60min, and the apparent pressure is more than or equal to 5 MPa);
(5) And demolding, taking out the solidified and molded carbon fiber composite material irregular part and the sand dissolving mold, wiping the edge of the cavity of the carbon fiber composite material irregular part by using cotton cloth dipped with alcohol, separating the inner mold from the edge of the carbon fiber composite material irregular part, clamping the stripped inner mold by using tweezers, and taking the stripped inner mold out of the carbon fiber composite material irregular part to obtain the reusable carbon fiber composite material irregular part inner mold.
Example 3
The preparation method is suitable for the inner mold material of the carbon fiber special-shaped piece, the preparation of the inner mold and the detachment of the inner mold, and comprises the following steps:
(1) 55 parts of a polybutadiene diol acrylate (molecular weight of a hydroxyl-terminated polybutadiene diol: 3.5X10) were charged into a load reaction vessel at room temperature 3 g/mol); then, slowly adding 30 parts of isobornyl methacrylate and 12 parts of isotridecyl acrylate, and stirring for 30min;
(2) 1 part of ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate and 1 part of 2-hydroxy-2-methyl-1-phenyl-1-propanone are added, the stirring temperature is raised to 45-50 ℃ and stirred for 30min; then cooling to room temperature, adding 1 part of fumed silica, stirring and vacuumizing for 30min (vacuum degree-0.095 mPa) to obtain a strippable carbon fiber composite special-shaped part inner mold material;
(3) Uniformly attaching a layer of internal mold material with the thickness of about 300 mu m on the surface of the solidified water-soluble sand mold through a dip coating process, and solidifying for 20 seconds under the irradiation condition of an ultraviolet lamp (the wavelength is 355nm and 395 nm) to obtain a carbon fiber composite material special-shaped piece mold;
(4) Spreading carbon fiber cloth on the surface of a die to obtain an uncured carbon fiber composite material abnormal-shaped piece blank, placing the uncured blank into a steel die sprayed with a release agent, and heating and pressurizing the steel die by using a vulcanizing press (the curing process is 90 ℃ multiplied by 30min+110 ℃ multiplied by 60min, and the apparent pressure is more than or equal to 5 MPa);
(5) And demolding, taking out the solidified and molded carbon fiber composite material irregular part and the sand dissolving mold, wiping the edge of the cavity of the carbon fiber composite material irregular part by using cotton cloth dipped with alcohol, separating the inner mold from the edge of the carbon fiber composite material irregular part, clamping the stripped inner mold by using tweezers, and taking the stripped inner mold out of the carbon fiber composite material irregular part to obtain the reusable carbon fiber composite material irregular part inner mold.
Example 4
The preparation method is suitable for the inner mold material of the carbon fiber special-shaped piece, the preparation of the inner mold and the detachment of the inner mold, and comprises the following steps:
(1) 50 parts of a polybutadiene diol acrylate (molecular weight of the hydroxyl-terminated polybutadiene diol is 4.0X10) are added to a reaction kettle at room temperature 3 g/mol); then, 25 parts of 2-phenoxyethyl methacrylate and 21.5 parts of tetrahydrofuranacrylate are slowly added and stirred for 30min;
(2) 1 part of ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate, 1 part of alpha, alpha-dimethoxy-alpha-phenylacetophenone and 1 part of benzoin dimethyl ether are added, and the stirring temperature is raised to 45-50 ℃ and stirred for 30min; then cooling to room temperature, adding 0.5 part of fumed silica, stirring and vacuumizing for 30min (vacuum degree-0.095 mPa) to obtain a strippable carbon fiber composite special-shaped part inner mold material;
(3) Uniformly attaching a layer of internal mold material with the thickness of about 300 mu m on the surface of the solidified water-soluble sand mold through a dip coating process, and solidifying for 20 seconds under the irradiation condition of an ultraviolet lamp (the wavelength is 355nm and 395 nm) to obtain a carbon fiber composite material special-shaped piece mold;
(4) Spreading carbon fiber cloth on the surface of a die to obtain an uncured carbon fiber composite material abnormal-shaped piece blank, placing the uncured blank into a steel die sprayed with a release agent, and heating and pressurizing the steel die by using a vulcanizing press (the curing process is 90 ℃ multiplied by 30min+110 ℃ multiplied by 60min, and the apparent pressure is more than or equal to 5 MPa);
(5) And demolding, taking out the solidified and molded carbon fiber composite material irregular part and the sand dissolving mold, wiping the edge of the cavity of the carbon fiber composite material irregular part by using cotton cloth dipped with alcohol, separating the inner mold from the edge of the carbon fiber composite material irregular part, clamping the stripped inner mold by using tweezers, and taking the stripped inner mold out of the carbon fiber composite material irregular part to obtain the reusable carbon fiber composite material irregular part inner mold.
Repeated performance test:
the inner mold prepared in example 1-example 4 was wiped with cotton dipped with ethanol at the edge of the cavity of the carbon fiber composite material profiled member, the inner mold was separated from the carbon fiber composite material profiled member, and the peeled inner mold was clamped with tweezers, and was taken out from the inside of the carbon fiber composite material profiled member. Then, the mixture of sand and polymer is refilled, and after the polymer is solidified, a mold is obtained from the reusable carbon fiber composite profile. The number of uses of the inner mold prepared from examples 1-4 is shown in FIG. 5. As can be seen from the experimental results of FIG. 5, the inner molds prepared in examples 1 to 4 were reused 4 times, 5 times, 10 times and 7 times, respectively, and had good economical efficiency.
The test data show that the low-modulus high-elasticity polybutadiene component is successfully synthesized, the prepared internal mold can be easily stripped, and can be stripped from the carbon fiber composite material special-shaped piece under the action of external force or ethanol, so that the internal mold is removed from the inside of the special-shaped piece, and the weight of the special-shaped piece is further reduced; and can reuse, make the mould of carbon fiber composite material again through adding sand and polymer, be used for the shaping of carbon fiber composite material dysmorphism piece, satisfy the mould application of the carbon fiber composite material dysmorphism piece of shape complicacy. The main component of the internal mold material is synthesized polybutadiene with low modulus and high elasticity, the compatibility of the polybutadiene with epoxy resin is poor, and the polybutadiene has excellent mechanical properties, and can be peeled from the edge and the inside of the cured carbon fiber composite special-shaped piece by means of a solvent or external force, so that the weight of the carbon fiber special-shaped piece is further reduced; and after ultraviolet light curing, the internal mold material generates a three-dimensional network with a certain shape and structure, can be reused, and is suitable for the technical field of high-performance carbon fiber special-shaped part forming. Further tensile property test data also confirm the above.
Tensile property test: the products of examples 1-4 were poured into a mold, cured with a uv curing apparatus, and then prepared into standard bars with dumbbell-type cut-off knives. The bars were tested for tensile properties at room temperature using an electronic stretcher. The movement speed of the cross beam was 50mm/min, and the result is shown in FIG. 3. As can be seen from FIG. 3, the sample bars of examples 1-4 have a breaking strength of 10-17.5MPa and an elongation at break of 325% -425%. The above test illustrates: the cured internal mold material has better tensile strength and higher elongation at break, can ensure that the internal mold is taken out from the cured carbon fiber composite special-shaped piece under the action of external force, and can be reused.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The reusable inner die material suitable for the carbon fiber special-shaped piece is characterized by comprising the following components in parts by weight:
45-60 parts of acrylic polybutadiene diol ester,
35-45 parts of acrylic ester reactive diluent,
2-5 parts of photoinitiator;
0.2-2.0 parts of fumed silica;
wherein the molecular formula of the acrylic polybutadiene diol ester is shown as follows,
R 1 is H or CH 3 ，
R 2 Is H or CH 3 ,
n is a positive integer, and n is more than or equal to 46 and less than or equal to 92;
and, the acrylic polybutadiene diol ester is prepared according to the following method, the steps are as follows:
(1) Adding dibutyl tin dilaurate and diisocyanate into hydroxyl-terminated polybutadiene under stirring, heating to 70-85 ℃, and reacting for 2-3.5h;
(2) Sequentially adding hydroxy acrylic ester and polymerization inhibitor at 70-85 ℃, reacting for 3-4h, cooling to below 45 ℃, and filtering to obtain acrylic polybutadiene diol ester;
wherein the structural formula of the hydroxyl-terminated polybutadiene isN is more than or equal to 46 and less than or equal to 92, and the number average molecular weight is 2.5X10 3 g/mol～5.0×10 3 g/mol；
The diisocyanate is at least one of isophorone diisocyanate, toluene diisocyanate, dicyclohexylmethane diisocyanate and hexamethylene diisocyanate,
the hydroxy acrylic ester is at least one of hydroxy ethyl acrylate, hydroxy propyl acrylate, hydroxy ethyl methacrylate and hydroxy propyl methacrylate,
the polymerization inhibitor is at least one of hydroquinone, p-hydroxyanisole, benzoquinone, tert-butyl catechol and phenothiazine;
the molar ratio of hydroxyl-terminated polybutadiene, hydroxyl acrylate and diisocyanate is 1:2:2, the dosage of the dibutyl tin dilaurate is 0.05-0.1% of the total mass of the hydroxyl-terminated polybutadiene and the diisocyanate, and the dosage of the polymerization inhibitor is 0.005-0.02% of the total mass of the hydroxyl-terminated polybutadiene, the diisocyanate and the hydroxy acrylic ester.
2. The in-mold material of claim 1, wherein the acrylate reactive diluent is at least one of isobornyl acrylate, isobornyl methacrylate, isotridecyl acrylate, 2-phenoxyvinyl acrylate, 2-phenoxyethyl methacrylate, phenoxy acrylate, tetrahydrofurane acrylate.
3. The in-mold material of claim 1, wherein the photoinitiator is at least one of ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, α -dimethoxy- α -phenylacetophenone, benzoin dimethyl ether.
4. The internal mold material according to claim 1, wherein the hydroxyl-terminated polybutadiene used in the preparation method of the acrylic polybutadiene diol ester has a hydroxyl value of 0.40 to 0.80mmol/g.
5. The method of using a reusable inner mold material for shaped carbon fiber pieces as set forth in claim 1, comprising the steps of:
(1) At room temperature, according to parts by weight, adding 35-45 parts of acrylic ester reactive diluent slowly into 45-60 parts of acrylic polybutadiene dihydric alcohol ester, and stirring uniformly;
(2) Adding 2-5 parts of photoinitiator according to parts by weight, and uniformly stirring at 45-50 ℃; then cooling to room temperature, adding 0.2-2.0 parts of fumed silica, stirring, and vacuumizing to ensure that the vacuum degree is less than or equal to minus 0.095mPa and the temperature is less than or equal to 35 ℃ to obtain a die material;
(3) The solidified water-soluble sand mould is dip-coated, and mould materials with the thickness of 250-350 mu m are uniformly attached to the surface of the solidified water-soluble sand mould, and the special-shaped piece inner mould is obtained after solidification under the ultraviolet irradiation condition;
(4) Spreading carbon fiber cloth on the surface of an inner die of the special-shaped piece to obtain an uncured carbon fiber composite material special-shaped piece blank, putting the uncured carbon fiber composite material special-shaped piece blank into a steel die sprayed with a release agent, and heating and pressurizing the steel die by a vulcanizing press to mold;
(5) Taking out the solidified and formed carbon fiber composite material irregular part, dissolving out the sand mould, wiping the edge of the cavity of the carbon fiber composite material irregular part by using cotton cloth dipped with alcohol, separating the irregular part inner mould from the edge of the carbon fiber composite material irregular part, clamping the stripped inner mould by using forceps, and taking out the carbon fiber composite material irregular part from the inside of the carbon fiber composite material irregular part;
(6) The taken-out special-shaped piece internal mold can be reused.
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