CN114393854A - Carbon fiber hollow pipe forming method based on silica gel core mold - Google Patents
Carbon fiber hollow pipe forming method based on silica gel core mold Download PDFInfo
- Publication number
- CN114393854A CN114393854A CN202111430403.6A CN202111430403A CN114393854A CN 114393854 A CN114393854 A CN 114393854A CN 202111430403 A CN202111430403 A CN 202111430403A CN 114393854 A CN114393854 A CN 114393854A
- Authority
- CN
- China
- Prior art keywords
- silica gel
- carbon fiber
- mold
- core mold
- gel core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 81
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 81
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000000741 silica gel Substances 0.000 claims abstract description 19
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 19
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 19
- 238000000465 moulding Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000003672 processing method Methods 0.000 claims description 3
- 239000000499 gel Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 12
- 239000004677 Nylon Substances 0.000 description 8
- 229920001778 nylon Polymers 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000004816 latex Substances 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000000835 fiber Substances 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
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
-
- 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
- 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
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- 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
- B29C33/405—Elastomers, e.g. rubber
-
- 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
-
- 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
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Abstract
The invention relates to a carbon fiber hollow pipe forming method based on a silica gel core mold, which comprises the following steps: preparing a pipe mould to be formed; putting thermosetting silica gel with a set volume into a mold cavity of a mold, closing the mold, forming the thermosetting silica gel into a silica gel core mold with the shape of a pipe to be formed under a first set condition, and taking out the silica gel core mold after the completion; processing a silica gel core mold, and cutting off a set thickness; laying a carbon fiber prepreg on the surface of a silica gel core mold to obtain a preformed body, putting the preformed body into the mold cavity, closing the mold, curing and molding the preformed body under a second set condition, and taking out the cured and molded preformed body after the mold is closed; and taking out the silica gel core mold in the solidified and molded preformed body to obtain the pipe to be molded. The invention solves the problems of uneven inner wall, uneven wall thickness and the like of the carbon fiber hollow pipe obtained by the traditional forming method, does not need other equipment for demoulding, does not need to coat a demoulding agent on the surface of a core mould, and has lower cost.
Description
Technical Field
The invention belongs to the technical field of material forming, and particularly relates to a carbon fiber hollow pipe forming method based on a silica gel core mold.
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 carbon fiber has excellent mechanical property, the tensile strength of the carbon fiber resin composite material can reach 3500Mpa and above, and the tensile elastic modulus is 230-430 Gpa. The carbon fiber pipe is a novel pipe, has the advantages of high strength, long service life, corrosion resistance, light weight, low density and the like, and is widely applied to industries such as buildings, sports equipment, medical appliances and the like.
At present, the forming methods for carbon fiber hollow pipes generally comprise a nylon air bag forming method, an emulsion EPS core forming method and a metal core forming method, but the three methods still have certain defects. The nylon air bag forming method is characterized in that a core mold adopts a nylon air bag, carbon fibers are rolled on the nylon air bag and placed into a mold for forming, the wall thickness of a carbon fiber hollow pipe formed by the method is quite uneven, the inner wall of the carbon fiber hollow pipe is uneven, if a fitting piece is arranged on the inner wall of the carbon fiber hollow pipe, the inner wall of the carbon fiber hollow pipe needs to be polished, and time and labor are wasted; the latex EPS core mold forming method adopts latex EPS as a core mold, and although the method solves the problem of uneven inner wall of the carbon fiber hollow pipe, the latex EPS can shift in the forming process, the wall thickness is uneven, and the production cost is high; although the problems of uneven inner wall and uneven wall thickness of the carbon fiber hollow pipe are solved by adopting the metal core mould forming method, the metal core mould forming method has the problem of difficult demoulding, and the metal core mould needs to be pulled out by other equipment, so that the time and the labor are wasted, and the cost is increased.
Disclosure of Invention
The invention aims to provide a carbon fiber hollow pipe forming method based on a silica gel core mold, which is used for solving the problems of uneven inner wall and high production cost of a carbon fiber hollow pipe obtained in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a carbon fiber hollow pipe forming method based on a silica gel core mold comprises the following steps:
s1: preparing a pipe mould to be formed, wherein the mould comprises an upper mould and a lower mould, and a mould cavity is formed between the upper mould and the lower mould;
s2: putting thermosetting silica gel with a set volume into a mold cavity, closing an upper mold and a lower mold, forming the thermosetting silica gel into a silica gel core mold with the shape of a pipe to be formed under a first set condition, parting the upper mold and the lower mold, and taking out the silica gel core mold;
s3: processing the silica gel core mold, and cutting off the silica gel core mold to a set thickness;
s4: laying carbon fiber prepreg on the surface of a silica gel core mold to obtain a preformed body, placing the preformed body into a mold cavity, closing an upper mold and a lower mold, curing and molding the preformed body under a second set condition, parting the upper mold and the lower mold, and taking out the cured and molded preformed body;
s5: and taking out the silica gel core mold in the solidified and molded preformed body to obtain the pipe to be molded.
Preferably, in S2, the set volume of the thermosetting silicone gel is not less than the volume of the mold cavity.
Preferably, in S2, the first setting condition includes a first setting temperature, a first setting time and a first setting pressure.
Further preferably, the first set temperature is 130-150 ℃; the first set time is 2-3 h; the first set pressure is 50-70 kgf.
Preferably, in S3, the set thickness is the wall thickness of the pipe to be formed.
Preferably, in S3, the silica gel core mold is processed by manual processing with a tool or by an automatic machine tool. The processing method can be determined according to the precision requirement of the pipe to be formed.
Preferably, in S4, the carbon fiber prepreg is provided with a plurality of layers, the thickness of the plurality of layers of carbon fiber prepregs is consistent with the wall thickness of the pipe to be formed, and the type of each layer of carbon fiber prepreg is selected according to the performance requirement of the pipe to be formed.
Preferably, in S4, when the carbon fiber prepreg is laid, a plurality of layers of the carbon fiber prepreg are wound around the silica gel core mold, and the peripheral surface of the silica gel core mold is completely covered.
Preferably, in S4, the second setting condition includes a second setting temperature, a second setting time and a second setting pressure.
Further preferably, the second set temperature is 130-150 ℃; the second set time is 0.5-1.5 h; the second set pressure is 50-70 kgf.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the invention, the silica gel core mold is adopted in the forming process of the carbon fiber hollow pipe, so that the problems of uneven inner wall, uneven wall thickness and the like of the carbon fiber hollow pipe obtained by the traditional forming method are solved, demolding is not required by other equipment, a demolding agent is not required to be coated on the surface of the core mold, the cost is lower, the process is simple, and the production efficiency is high.
Drawings
FIG. 1 is a schematic view of the inner wall of the product of this example;
FIG. 2 is a schematic diagram of the inner wall of the product of the first comparative example.
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.
A carbon fiber hollow pipe forming method based on a silica gel core mold comprises the following steps:
S1：
preparing a pipe die to be formed, wherein the die comprises an upper die and a lower die, and a die cavity is formed between the upper die and the lower die.
S2：
Putting thermosetting silica gel with a set volume into a mold cavity, wherein the main component of the silica gel is silicon dioxide, the thermoplastic silica gel can be softened when being heated and cannot be used when being heated and molded repeatedly, and the thermosetting silica gel is selected and used, and the set volume of the thermosetting silica gel is not less than the volume of the mold cavity;
closing the upper die and the lower die, and forming the thermosetting silica gel into a silica gel core die with the shape of the pipe to be formed under a first set condition, wherein the first set condition comprises a first set temperature, a first set time and a first set pressure, the first set temperature is 130-150 ℃, the first set time is 2-3h, and the first set pressure is 50-70 kgf;
and (4) separating the upper die and the lower die, and taking out the silica gel core die.
S3：
Processing the taken silica gel core mold, cutting off a set thickness, wherein the set thickness is the wall thickness of the pipe to be molded, and specifically:
the method comprises the steps of manually processing the silica gel core mold by adopting a cutter or processing by adopting an automatic machine tool, and the like, wherein the processing method is determined according to the precision requirement of the pipe to be molded, if the precision requirement of the pipe to be molded is lower, the cutter is used for manually processing, and if the precision requirement of the pipe to be molded is higher, the automatic machine tool is used for processing.
S4：
Laying a carbon fiber prepreg on the surface of a silica gel core mold to obtain a preform, specifically: the carbon fiber prepreg is provided with a plurality of layers, the thickness of the plurality of layers of carbon fiber prepregs is consistent with the wall thickness of the pipe to be molded, the type of each layer of carbon fiber prepreg is selected according to the performance requirement of the pipe to be molded, when the carbon fiber prepregs are laid, the plurality of layers of carbon fiber prepregs are wound on the silica gel core mold, and the circumferential surface of the silica gel core mold is completely coated;
placing the pre-forming body into a mold cavity, closing the upper mold and the lower mold, and curing and forming the pre-forming body under a second set condition, wherein the second set condition comprises a second set temperature, a second set time and a second set pressure, the second set temperature is 130-150 ℃, the second set time is 0.5-1.5h, and the second set pressure is 50-70 kgf;
and separating the upper die and the lower die, and taking out the solidified and molded preformed body.
S5：
And taking out the silica gel core mold in the solidified and molded preformed body to obtain the pipe to be molded.
Example (b):
the carbon fiber hollow square tube forming method based on the silica gel core mold is adopted for forming the carbon fiber hollow square tube, the section outer diameter of the carbon fiber hollow square tube is 50 x 70mm, the wall thickness is 3mm, and the length is 1600mm, and the method specifically comprises the following steps:
s1: preparing a pipe die to be formed, wherein the die comprises an upper die and a lower die, and a die cavity is formed between the upper die and the lower die.
S2: take 0.0056m3The thermosetting silica gel is put into a die cavity, an upper die and a lower die are closed, the thermosetting silica gel is formed into a silica gel core die with the shape of a pipe to be formed under the conditions of the temperature of 150 ℃, the time of 3 hours and the pressure of 65kgf, the upper die and the lower die are separated, and the silica gel core die is taken out.
S3: and (4) processing the taken silica gel core mold, and cutting off the silica gel core mold to a set thickness, namely, cutting off the taken silica gel core mold to a thickness of 3mm by using an automatic machine tool.
S4: selecting carbon fiber prepreg with the model number of T400 grade, paving the carbon fiber prepreg on the surface of a silica gel core mold, paving 15 layers in total, alternately paving the layers at 0 degrees, +/-45 degrees and 90 degrees to obtain a preformed body, putting the preformed body into a mold cavity, closing an upper mold and a lower mold, curing and molding the preformed body under the conditions that the temperature is 150 ℃, the time is 0.5h and the pressure is 70kgf, parting the upper mold and the lower mold, and taking out the cured and molded preformed body.
S5: and taking out the silica gel core mold in the solidified and molded preform to obtain the pipe to be molded, as shown in figure 1.
Comparative example one:
adopt traditional nylon air pocket forming method to shape carbon fiber hollow square tube, the cross-section external diameter of carbon fiber hollow square tube is 50 x 70mm, and the wall thickness is 3mm, and length is 1600mm, specifically includes the following step:
s1: preparing a pipe die to be formed and a nylon air bag core die, wherein the die comprises an upper die and a lower die, and a die cavity is formed between the upper die and the lower die.
S2: selecting carbon fiber prepreg with the model number of T400 grade, paving the carbon fiber prepreg on the surface of a nylon air bag core mold, paving 15 layers in total, alternately paving the layers at 0 degrees, 45 degrees and 90 degrees to obtain a preformed body, putting the preformed body into a mold cavity, closing an upper mold and a lower mold, curing and molding the preformed body under the conditions that the temperature is 150 ℃, the time is 0.5h and the pressure is 70kgf, parting the upper mold and the lower mold, and taking out the cured and molded preformed body.
S3: and taking out the nylon air bag core mold in the solidified and molded preforming body to obtain the pipe to be molded, as shown in figure 2.
Comparative example two:
the carbon fiber hollow square tube forming method based on the silica gel core mold is adopted to form the carbon fiber hollow square tube, the section outer diameter of the carbon fiber hollow square tube is 50 x 70mm, the wall thickness is 3mm, and the length is 1600mm, but in the forming process, the silica gel core mold is not formed under a first set condition, and the method specifically comprises the following steps:
s1: preparing a pipe die to be formed, wherein the die comprises an upper die and a lower die, and a die cavity is formed between the upper die and the lower die.
S2: take 0.0056m3The thermosetting silica gel is put into a die cavity, an upper die and a lower die are closed, the thermosetting silica gel is waited for forming and curing under the conditions that the temperature is 120 ℃, the time is 2 hours and the pressure is 40kgf, the upper die and the lower die are separated after the set conditions are achieved, but the thermosetting silica gel is not formed and cured, so the subsequent steps can not be carried out.
Comparative example three:
the carbon fiber hollow square tube forming method based on the silica gel core mold is adopted to form the carbon fiber hollow square tube, the section outer diameter of the carbon fiber hollow square tube is 50 x 70mm, the wall thickness is 3mm, the length is 1600mm, but in the forming process, a preform is not formed under a second set condition, and the method specifically comprises the following steps:
s1: preparing a pipe die to be formed, wherein the die comprises an upper die and a lower die, and a die cavity is formed between the upper die and the lower die.
S2: take 0.0056m3The thermosetting silica gel is put into a die cavity, an upper die and a lower die are closed, the thermosetting silica gel is formed into a silica gel core die with the shape of a pipe to be formed under the conditions of the temperature of 150 ℃, the time of 3 hours and the pressure of 65kgf, the upper die and the lower die are separated, and the silica gel core die is taken out.
S3: and (4) processing the taken silica gel core mold, and cutting off the silica gel core mold to a set thickness, namely, cutting off the taken silica gel core mold to a thickness of 3mm by using an automatic machine tool.
S4: selecting carbon fiber prepreg with the model number of T400 grade, paving the carbon fiber prepreg on the surface of a silica gel core mold, paving 15 layers in total, alternately paving the layers at 0 degrees, 45 degrees and 90 degrees to obtain a preformed body, putting the preformed body into a mold cavity, closing an upper mold and a lower mold, waiting for the curing and forming of the preformed body under the conditions that the temperature is 120 ℃, the time is 2 hours and the pressure is 45kgf, parting the upper mold and the lower mold after a set condition is achieved, and not performing the forming and curing of the preformed body, so that the subsequent steps cannot be performed.
The carbon fiber hollow square pipe cannot be obtained through the second comparative example and the third comparative example, and two carbon fiber hollow square pipes are respectively obtained through the first comparative example and the second comparative example, as shown in fig. 1 and fig. 2, it is obvious from the drawings that the inner wall of the carbon fiber hollow square pipe obtained through the example is smoother, the edge angle of the turning part of the inner wall is more obvious, and the shape is more regular. In addition, the results of measuring the wall thickness and the inner wall flatness of the two carbon fiber hollow square tubes are shown in table 1. The test result shows that: the wall thickness of the carbon fiber hollow square pipe obtained in the example is 3 +/-0.1 mm, while the wall thickness of the carbon fiber hollow square pipe obtained in the comparative example is 3 +/-0.7 mm, so that a product with uniform wall thickness can be obtained by adopting a silica gel core mold forming mode; the flatness of the inner wall of the carbon fiber hollow square pipe obtained in the example was 0.2mm, whereas the flatness of the inner wall of the carbon fiber hollow square pipe obtained in the comparative example was 1.4mm, and therefore the flatness of the inner wall of the product obtained by the silica gel core mold molding method was better. In conclusion, the method for forming the carbon fiber hollow pipe based on the silica gel core mold solves the problems of uneven inner wall and uneven wall thickness of the carbon fiber hollow pipe obtained by the traditional forming method, does not need to perform demolding by other equipment, does not need to coat a demolding agent on the surface of the core mold, and has the advantages of low cost, simple process and high production efficiency.
Table 1 test results of carbon fiber hollow square tube of example and comparative example 1
| Wall thickness measurement results | Inner wall flatness measurement | |
| Examples | 3±0.1mm | 0.2mm |
| Comparative example 1 | 3±0.7mm | 1.4mm |
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 carbon fiber hollow pipe forming method based on a silica gel core mold is characterized in that: the method comprises the following steps:
s1: preparing a pipe mould to be formed, wherein the mould comprises an upper mould and a lower mould, and a mould cavity is formed between the upper mould and the lower mould;
s2: putting thermosetting silica gel with a set volume into a mold cavity, closing an upper mold and a lower mold, forming the thermosetting silica gel into a silica gel core mold with the shape of a pipe to be formed under a first set condition, parting the upper mold and the lower mold, and taking out the silica gel core mold;
s3: processing the silica gel core mold, and cutting off the silica gel core mold to a set thickness;
s4: laying carbon fiber prepreg on the surface of a silica gel core mold to obtain a preformed body, placing the preformed body into a mold cavity, closing an upper mold and a lower mold, curing and molding the preformed body under a second set condition, parting the upper mold and the lower mold, and taking out the cured and molded preformed body;
s5: and taking out the silica gel core mold in the solidified and molded preformed body to obtain the pipe to be molded.
2. The method for molding the carbon fiber hollow pipe based on the silica gel core mold as claimed in claim 1, wherein: in S2, the set volume of the thermosetting silicone gel is not less than the volume of the mold cavity.
3. The method for molding the carbon fiber hollow pipe based on the silica gel core mold as claimed in claim 1, wherein: at S2, the first setting condition includes a first setting temperature, a first setting time, and a first setting pressure.
4. The method for molding the carbon fiber hollow pipe based on the silica gel core mold as claimed in claim 3, wherein: the first set temperature is 130-150 ℃; the first set time is 2-3 h; the first set pressure is 50-70 kgf.
5. The method for molding the carbon fiber hollow pipe based on the silica gel core mold as claimed in claim 1, wherein: in S3, the set thickness is the wall thickness of the pipe to be formed.
6. The method for molding the carbon fiber hollow pipe based on the silica gel core mold as claimed in claim 1, wherein: in S3, the silica gel core mold is processed by a manual processing method using a tool or an automatic machine tool.
7. The method for molding the carbon fiber hollow pipe based on the silica gel core mold as claimed in claim 1, wherein: in S4, the carbon fiber prepreg is provided with a plurality of layers, the thickness of the plurality of layers of carbon fiber prepregs is consistent with the wall thickness of the pipe to be formed, and the type of each layer of carbon fiber prepreg is selected according to the performance requirement of the pipe to be formed.
8. The method for molding the carbon fiber hollow pipe based on the silica gel core mold as claimed in claim 1, wherein: in S4, when the carbon fiber prepreg is laid, a plurality of layers of the carbon fiber prepreg are wound around the silica gel core mold, and the peripheral surface of the silica gel core mold is completely covered.
9. The method for molding the carbon fiber hollow pipe based on the silica gel core mold as claimed in claim 1, wherein: in S4, the second setting condition includes a second setting temperature, a second setting time, and a second setting pressure.
10. The method for molding the carbon fiber hollow pipe based on the silica gel core mold as claimed in claim 9, wherein: the second set temperature is 130-150 ℃; the second set time is 0.5-1.5 h; the second set pressure is 50-70 kgf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111430403.6A CN114393854A (en) | 2021-11-29 | 2021-11-29 | Carbon fiber hollow pipe forming method based on silica gel core mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111430403.6A CN114393854A (en) | 2021-11-29 | 2021-11-29 | Carbon fiber hollow pipe forming method based on silica gel core mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114393854A true CN114393854A (en) | 2022-04-26 |
Family
ID=81225656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111430403.6A Pending CN114393854A (en) | 2021-11-29 | 2021-11-29 | Carbon fiber hollow pipe forming method based on silica gel core mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114393854A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116552024A (en) * | 2023-06-29 | 2023-08-08 | 东莞市聚力复合材料科技有限公司 | High-strength light-weight mechanical arm and manufacturing process and manufacturing die thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490372A (en) * | 2011-12-12 | 2012-06-13 | 中国科学院宁波材料技术与工程研究所 | Method for forming carbon fiber pipe and die thereof |
| CN110802850A (en) * | 2019-10-12 | 2020-02-18 | 航天材料及工艺研究所 | Forming method of composite material pipe with large slenderness ratio |
-
2021
- 2021-11-29 CN CN202111430403.6A patent/CN114393854A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490372A (en) * | 2011-12-12 | 2012-06-13 | 中国科学院宁波材料技术与工程研究所 | Method for forming carbon fiber pipe and die thereof |
| CN110802850A (en) * | 2019-10-12 | 2020-02-18 | 航天材料及工艺研究所 | Forming method of composite material pipe with large slenderness ratio |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116552024A (en) * | 2023-06-29 | 2023-08-08 | 东莞市聚力复合材料科技有限公司 | High-strength light-weight mechanical arm and manufacturing process and manufacturing die thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106182804A (en) | The mould of composite pipe and forming method | |
| CN108749030B (en) | Method for preparing composite material pipe by using internal expansion method forming die | |
| CN113427793B (en) | High-strength high-temperature-resistant composite material air inlet channel and forming method thereof | |
| CN114393854A (en) | Carbon fiber hollow pipe forming method based on silica gel core mold | |
| CN108016054A (en) | Carbon fibre composite is molded membranous disc manufacturing process | |
| CN108864995B (en) | Multi-axial composite material bent pipe and preparation method thereof | |
| CN112454950B (en) | Technological skin, wave-absorbing composite material part and preparation method thereof | |
| CN107696522A (en) | A kind of carbon fibre fabric method for forming parts at band R angles | |
| RU2458791C2 (en) | Method and tooling for production of hollow axially-symmetric shells (shell of revolution) from composite polymer materials | |
| CN110748716A (en) | HDPE steel strip reinforced helical bellows and production process thereof | |
| CN112123810B (en) | Process method for improving forming quality of large-thickness composite material rudder | |
| CN108995240A (en) | A kind of forming method of composite material tubular component | |
| CN109940908A (en) | A kind of moulding process of carbon fiber and phenolic resin composite | |
| CN107089015B (en) | It is a kind of to improve the die press technology for forming that fiber answers material appearance using polymeric membrane | |
| CN110936634B (en) | Forming method of foam interlayer composite material | |
| CN206264392U (en) | The resistance to air bottle of intelligent monitoring three-dimensional composite material | |
| CN110667012A (en) | Composite material preforming mold and manufacturing method | |
| CN114147996B (en) | Composite material structure containing internal channel with large slenderness ratio and preparation method thereof | |
| CN110355974A (en) | A kind of molding equipment and moulding process of the cable jacket being embedded in rigidity reinforced element | |
| CN210511016U (en) | Ultra-high molecular weight polyethylene powder extrusion molding's cavity stick base and gear | |
| CN105666769A (en) | One-step compression molding method for complex-molded part made of short carbon fiber sheet material | |
| CN219427461U (en) | Device for continuously forming reinforced thermoplastic pipe | |
| CN113927921B (en) | Manufacturing method of irregularly-shaped carbon fiber appearance part | |
| JP6712430B1 (en) | Method for producing thermoplastic fiber-reinforced resin molded product | |
| CN112060617A (en) | Composite hollow curved tube, forming die and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |