CN114179389A - Method for improving fiber volume content in winding process of composite shell - Google Patents
Method for improving fiber volume content in winding process of composite shell Download PDFInfo
- Publication number
- CN114179389A CN114179389A CN202111451298.4A CN202111451298A CN114179389A CN 114179389 A CN114179389 A CN 114179389A CN 202111451298 A CN202111451298 A CN 202111451298A CN 114179389 A CN114179389 A CN 114179389A
- Authority
- CN
- China
- Prior art keywords
- shell
- winding
- volume content
- composite material
- winding process
- 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
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
-
- 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
Landscapes
- 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 discloses a method for improving the fiber volume content in the winding process of a composite material shell, which comprises the following steps: s1, preparing the composite material shell by adopting wet winding, and carrying out whole-process glue scraping treatment on the redundant epoxy resin glue solution on the winding layer in the winding process; s2, uniformly sticking a layer of adhesive tape on the wound composite material shell barrel section, then annularly winding high-strength glass fiber yarns for adhesive tape absorption, and then putting the composite material shell into a curing furnace for curing; and S3, removing the demolding cloth and the adhesive-absorbing high-strength glass fiber yarns from the cured composite material shell to obtain a finished product. The invention greatly reduces the content of resin in the shell and the porosity in the shell by controlling the winding tension, the temperature in the winding process and increasing the adhesive absorption layer, and improves the volume content of the fiber. The prepared shell has good fiber orientation, few internal defects, excellent mechanical property and high reliability.
Description
Technical Field
The invention belongs to the technical field of composite material shells, and particularly relates to a method for improving the volume content of fibers in the winding process of a composite material shell.
Background
The fiber winding technology is developed rapidly along with the development of design theory and method, material process and equipment technology, is convenient to implement in the actual production process, is simple to operate, and is widely used for manufacturing military products such as aerospace vehicles, solid rocket engine shells and the like at present. The existing wet winding method has the problems of large consumption of epoxy resin, severe operating environment, difficult control of gel content and shell quality and the like when preparing the composite shell.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide a method for improving the fiber volume content in the winding process of a composite material shell, which is operable, easy to process and simple in process steps.
In order to achieve the purpose, the method for improving the fiber volume content in the winding process of the composite material shell comprises the following steps:
s1, preparing the composite material shell by adopting wet winding, and carrying out whole-process glue scraping treatment on the redundant epoxy resin glue solution on the winding layer in the winding process;
and S2, uniformly sticking a layer of adhesive tape on the wound composite material shell barrel section, then annularly winding high-strength glass fiber yarns for adhesive tape absorption, and then putting the composite material shell into a curing furnace for curing.
And S3, removing the demolding cloth and the adhesive-absorbing high-strength glass fiber yarns from the cured composite material shell to obtain a finished product.
Preferably, in S1, the wet winding is to wind the carbon fiber bundle onto the mandrel under a certain tension after dipping the carbon fiber bundle.
More preferably, the winding tension is set to a specific value of 38N to 42N.
Preferably, in S1, the adhesive scraping is started until the viscosity of the epoxy resin is lower than 200 mPas.
Preferably, in S1, if the ambient temperature is lower than 20 ℃, the shell is heated by the heating device above the composite shell until the whole winding process is finished.
More preferably, the temperature of the heating device is set to 48 to 52 ℃.
Preferably, in S2, the curing process includes: heating to 95 ℃ from room temperature, preserving heat for 6 hours, naturally cooling to below 20-52 ℃ after solidification, and discharging.
Further preferably, the rate of temperature rise is 2 ℃/min.
The invention has the beneficial effects that:
1. given specific values of winding tension: the fiber can be ensured to be tightly wrapped by the epoxy resin matrix all the time in the winding process, the interface combination is good, and the defects of local glue shortage, pores and the like can be avoided.
2. The process for removing the gas in the shell is advanced: the composite material shell wound by the wet method is heated by using a bathroom heater, so that redundant resin is scraped after the viscosity of epoxy resin is reduced, then the shell subjected to glue scraping treatment is sequentially paved with a glue absorbing fabric and high-strength glass fiber yarns for glue absorbing, and finally the shell is put into a furnace for curing and forming, so that bubbles in the shell can be removed, the defects in the shell can be reduced, and the prepared composite material shell has the advantages of high fiber volume content, good apparent quality, few defects and excellent mechanical property.
The invention can improve the fiber volume content in the composite material shell to about 59 percent, so that the fiber performance is fully exerted, the structural efficiency of the composite material shell is maximized, and the problems of low strength of the composite material shell, stress concentration at the cloth texture interweaving points and the tail ends of chopped fibers, uneven product strength structure and the like are solved.
The invention greatly reduces the content of resin in the shell and the porosity inside the shell by controlling the winding tension, the temperature in the winding process and increasing the adhesive absorption layer, improves the volume content of the fiber, and has good fiber orientation of the prepared shell, less internal defects, excellent mechanical property and high reliability.
The method determines a specific winding tension value, and heats the composite material shell wound by a wet method through the bathroom heater, so that redundant resin is scraped after the viscosity of the epoxy resin is reduced, the content of the epoxy resin can be greatly reduced, the porosity in the shell is reduced, and the volume content of fibers is improved; and a layer of adhesive absorption fabric is laid on the shell after the glue scraping treatment, then high-strength glass fiber yarns are wound in the circumferential direction to absorb glue, finally the shell is sent into a curing furnace to be cured and molded, air bubbles in the shell are removed, the fiber volume content is improved, and the finally prepared composite shell has the advantages of high fiber volume content, few defects and excellent mechanical property.
Drawings
FIG. 1 is a schematic view of a housing structure
Detailed Description
The invention will now be described in further detail, including the preferred embodiments, by means of figure 1 and by way of a list of some alternative embodiments of the invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
The invention discloses a method for improving the fiber volume content in the winding process of a composite material shell, which comprises the following steps:
step one, preparing a composite material shell by adopting wet winding, wherein the specific method comprises the following steps: selecting a matched gypsum core mold as a mold according to the appearance shape and size of the composite material shell to be prepared, laying carbon fiber plain cloth on the surface of the mold, setting the tension parameter of a winding machine to be 40N, winding a layer of carbon fiber impregnated by epoxy resin on the gypsum core mold on which the carbon fiber plain cloth is laid by a wet winding process, and repeatedly winding the carbon fiber to the required shell thickness;
when the composite material shell is wound in the first step, if the ambient temperature is lower than 20 ℃, heating the shell by using a bath heater above the composite material shell, setting the temperature of the bath heater to be 50 ℃, and heating for a time until the whole winding process is finished, and in the winding process, performing whole-process glue scraping treatment on the redundant epoxy resin glue solution on the winding layer when the viscosity of the epoxy resin is lower than 200mPa & s;
step two, uniformly wrapping a layer of cut demoulding cloth on the wound composite material shell barrel body section in the step one, then winding a layer of high-strength glass fiber yarn in the circumferential direction, and then putting the composite material shell into a curing furnace for curing treatment, wherein the curing treatment process comprises the following steps: heating to 95 deg.C (heating rate of 2 deg.C/min) from room temperature, maintaining for 6 hr, solidifying, naturally cooling to below 50 deg.C, and discharging;
and step three, removing the demolding cloth and the high-strength glass fiber yarns on the surface of the composite material shell after the curing in the step two, and obtaining a finished product.
The composite material shell of the embodiment has the advantages of high fiber volume content, few defects, simple preparation process, strong operability, excellent mechanical property, high yield and the like, the fiber volume content of the shell is improved to 59 percent from 47 percent (the fiber volume content measured by the shell which is not prepared by the method of the invention), the axial compression strength is improved to 140MPa from 105MPa, the axial compression elastic modulus is improved to 70GPa from 58GPa, and the thermal expansion coefficient is improved to-4.3 multiplied by 10-6The K is reduced to-5.2X 10-6and/K. The improvement of the above properties benefits from two main aspects: firstly, the winding tension is determined during winding, so that the epoxy resin and the carbon fiber are fully impregnated all the time; and secondly, a bath heater is used for heating and scraping glue all the time in the winding process, and after the winding is finished, the demoulding cloth and the high-strength glass fiber yarn are adopted for double glue absorption treatment, so that the gas in the shell is fully discharged. Therefore, the prepared shell is low in porosity, high in fiber volume content and good in interface bonding strength, and can be successfully applied to the manufacturing of composite material products such as large-scale solid carrier rocket engines.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and any modification, combination, replacement, or improvement made within the spirit and principle of the present invention is included in the scope of the present invention.
Claims (8)
1. A method for increasing the fiber volume content in the winding process of a composite shell is characterized by comprising the following steps:
s1, preparing the composite material shell by adopting wet winding, and carrying out whole-process glue scraping treatment on the redundant epoxy resin glue solution on the winding layer in the winding process;
s2, uniformly sticking a layer of adhesive tape on the wound composite material shell barrel section, then annularly winding high-strength glass fiber yarns for adhesive tape absorption, and then putting the composite material shell into a curing furnace for curing;
and S3, removing the demolding cloth and the adhesive-absorbing high-strength glass fiber yarns from the cured composite material shell to obtain a finished product.
2. The method of increasing the fiber volume content of a composite shell winding process of claim 1, wherein: in S1, the wet winding is to wind the carbon fiber bundle onto the mandrel under a certain tension after dipping the carbon fiber bundle.
3. The method of increasing the fiber volume content of a composite shell winding process of claim 2, wherein: the specific value of the winding tension is 38N-42N.
4. The method of increasing the fiber volume content of a composite shell winding process of claim 1, wherein: in S1, the adhesive scraping is started when the viscosity of the epoxy resin is lower than 200 mPas.
5. The method of increasing the fiber volume content of a composite shell winding process of claim 1, wherein: and S1, if the ambient temperature is lower than 20 ℃, heating the shell by using a heating device above the composite shell until the whole winding process is finished.
6. The method of increasing the fiber volume content of a composite shell winding process of claim 5, wherein: the temperature of the heating device is set to be 48-52 ℃.
7. The method of increasing the fiber volume content of a composite shell winding process of claim 1, wherein: in S2, the curing process includes: heating to 95 ℃ from room temperature, preserving heat for 6 hours, naturally cooling to below 20-30 ℃ after solidification, and discharging.
8. The method of increasing the fiber volume content of a composite shell winding process of claim 7, wherein: the rate of temperature rise was 2 ℃/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111451298.4A CN114179389A (en) | 2021-12-01 | 2021-12-01 | Method for improving fiber volume content in winding process of composite shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111451298.4A CN114179389A (en) | 2021-12-01 | 2021-12-01 | Method for improving fiber volume content in winding process of composite shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114179389A true CN114179389A (en) | 2022-03-15 |
Family
ID=80541003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111451298.4A Pending CN114179389A (en) | 2021-12-01 | 2021-12-01 | Method for improving fiber volume content in winding process of composite shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114179389A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140120346A1 (en) * | 2012-10-26 | 2014-05-01 | James Rochen | Filament Wound Composite Ball |
| CN104552992A (en) * | 2014-12-27 | 2015-04-29 | 西安航天复合材料研究所 | Method for increasing fiber volume content during wet-process laying and winding of thick-wall composite component |
| KR20190117997A (en) * | 2018-04-09 | 2019-10-17 | 주식회사 케이에스엠테크 | Fiber . |
| CN111170756A (en) * | 2019-12-31 | 2020-05-19 | 西安超码科技有限公司 | Preparation method of revolving body carbon/carbon composite material |
| CN112297462A (en) * | 2020-09-02 | 2021-02-02 | 江苏新扬新材料股份有限公司 | Manufacturing method of rocket engine full composite material shell |
| CN113147009A (en) * | 2021-03-12 | 2021-07-23 | 哈尔滨玻璃钢研究院有限公司 | Process method for winding and forming engine shell by large-size fiber with chemical |
-
2021
- 2021-12-01 CN CN202111451298.4A patent/CN114179389A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140120346A1 (en) * | 2012-10-26 | 2014-05-01 | James Rochen | Filament Wound Composite Ball |
| CN104552992A (en) * | 2014-12-27 | 2015-04-29 | 西安航天复合材料研究所 | Method for increasing fiber volume content during wet-process laying and winding of thick-wall composite component |
| KR20190117997A (en) * | 2018-04-09 | 2019-10-17 | 주식회사 케이에스엠테크 | Fiber . |
| CN111170756A (en) * | 2019-12-31 | 2020-05-19 | 西安超码科技有限公司 | Preparation method of revolving body carbon/carbon composite material |
| CN112297462A (en) * | 2020-09-02 | 2021-02-02 | 江苏新扬新材料股份有限公司 | Manufacturing method of rocket engine full composite material shell |
| CN113147009A (en) * | 2021-03-12 | 2021-07-23 | 哈尔滨玻璃钢研究院有限公司 | Process method for winding and forming engine shell by large-size fiber with chemical |
Non-Patent Citations (1)
| Title |
|---|
| 上海化工学院等: "《玻璃钢工艺学》", 中国建筑工业出版社, pages: 88 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101725464B (en) | Method for making vane of wind-driven generator by adopting ultra-high strength polyethylene fiber composites | |
| CN110077013A (en) | Continue the composite material and its method of fibre three-dimensional braiding manufacture using preimpregnation glue connection | |
| CN112936657B (en) | Method for reinforcing phenolic resin composite material by using fiber braid with anti-oxidation laminated structure | |
| CN111170756B (en) | Preparation method of revolving body carbon/carbon composite material | |
| CN105082567B (en) | The curing of big thickness fiber reinforced epoxy resin based composites | |
| CN109367151A (en) | A kind of heat-insulated antiscour heat shield and preparation method thereof | |
| WO2014005397A1 (en) | Carbon fiber composite arm support, method for producing same and concrete pump car comprising same | |
| CN108839398B (en) | Propeller with carbon fiber-porous nylon composite structure and preparation method thereof | |
| CN107471676A (en) | A kind of preparation method of polyparaphenylene's Benzo-dioxazole fiber-reinforced resin matrix compound material | |
| CN112538233B (en) | Surface anti-scouring low-density ablation heat-proof material and preparation method thereof | |
| CN108081691B (en) | Aramid short fiber reinforced carbon fiber prepreg, preparation method and application | |
| CN104875397A (en) | Method for molding fiber composite material spray pipe perform connected by Z-pin | |
| CN113423563A (en) | Method for preparing polyurethane composite material by vacuum infusion process | |
| CN104552992B (en) | Improve the method that wet method paving twines fiber volume fraction in heavy wall composite element | |
| CN114179389A (en) | Method for improving fiber volume content in winding process of composite shell | |
| CN110789149B (en) | Method for preparing reinforced shell through prepreg sliver | |
| US20180043648A1 (en) | Method and apparatus for producing a preform | |
| CN114436670A (en) | Winding forming-based high-strength carbon-carbon cylinder preparation method | |
| CN112848378B (en) | Fiber reinforced composite blade material with bionic structure and preparation method thereof | |
| CN110625843A (en) | Drying method of sandwich material in polyurethane composite material | |
| CN115071160A (en) | Composite forming process for thermosetting fiber pipe fitting with complex special-shaped cross section | |
| CN209869235U (en) | Device for coating fiber reinforced foaming heat insulation layer outside large rotating body | |
| CN207758193U (en) | One kind can heat CT bed boards | |
| CN105415806A (en) | Composite material of high-ductility die-reinforced fiber and aluminum alloy and preparation method thereof | |
| CN112250459A (en) | Preparation method of alumina fiber reinforced ceramic composite material |
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 |