CN105398064A - Integral molding method and molding die for fiber-reinforced resin-based composite round pipe - Google Patents
Integral molding method and molding die for fiber-reinforced resin-based composite round pipe Download PDFInfo
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- CN105398064A CN105398064A CN201510850659.0A CN201510850659A CN105398064A CN 105398064 A CN105398064 A CN 105398064A CN 201510850659 A CN201510850659 A CN 201510850659A CN 105398064 A CN105398064 A CN 105398064A
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- fiber
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- reinforced resin
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- frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/345—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/462—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- 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 provides an integral molding method and a molding die for a fiber-reinforced resin-based composite round pipe. The method mainly comprises the following process: 1, preparing a fiber-reinforced resin-based composite round pipe prefabricated member; 2, putting the prefabricated member into the die, positioning the prefabricated member and closing the die; 3, injecting resin; 4, observing the rubber discharging condition of rubber discharging openings and gradually closing all the rubber discharging openings; 5, holding pressure in a die cavity after closing the last rubber discharging opening; 6, raising the temperature and curing; and 7, after curing, cooling to a room temperature, opening the die, and taking out the cured fiber-reinforced resin-based composite round pipe. The molding die is a main die obtained in the process of the method. The method has the advantages that molding equipment is low in cost, simple in structure, easy to operate, wide in adaptability, and rapid in composition; the injection of resin is even and stable, injection pressure and speed are adjustable, and selectable resin systems are diversified; and the quality of finished products is high, and the whole performance is excellent.
Description
Technical field
The invention provides a kind of integral forming method and mould of fiber-reinforced resin matrix compound material pipe, belong to manufacture technology of composite material field.
Background technology
Fiber-reinforced resin matrix compound material pipe is widely used in the structure of other high-performance such as oil, boats and ships and Aero-Space, low weight requirement.Fiber-reinforced resin matrix compound material dome-like roof has higher specific strength and the advantage such as specific stiffness, little linear expansion coefficient antifatigue and damping capacity be good.These application mainly comprise movable bridge beam, supporting member in helicopter and pull bar and other similar aircraft structural components, the structural elements etc. at the antenna holder of spacecraft and satellite, solar cell windsurfing support and following large space station.It is significant for reduction dead load, raising useful load.
The forming method of fiber-reinforced resin matrix compound material pipe has a variety of, as Resin film infusion (RFI), resin transfer molding technique (RTM) and autoclave forming process.
Wherein, RFI technique is too strict for the requirement of resin system; Its process is shaping comparatively difficult for complex-shaped small piece, as circular tube structure; In addition, the resin demand in RFI technique should not control, and not only there is certain wasting phenomenon, also needs to carry out a large amount of removing work to Excess resin.
Although traditional autoclave method can realize the global formation of structure, be restricted in actual applications because its processing cost is too high.
Resin transfer molding technique (RTM), as a kind of liquid integral forming method of low cost, compares the suitability for industrialized production being suitable for fiber-reinforced resin matrix compound material pipe.But the globality of the fiber-reinforced resin matrix compound material pipe that common some utilize RTM technique to prepare is poor, and pipe easily produces the defect such as layering, inner many bubbles, affects the application of structure, therefore needs to take some measures and is improved.
Summary of the invention
The object of the present invention is to provide a kind of technique simple, with low cost, the integral forming method of fiber-reinforced resin matrix compound material pipe easy and simple to handle, overcome the deficiencies in the prior art, solve the problem easily producing the internal flaw such as layering, hole in fiber-reinforced resin matrix compound material shaping round tube process.
The integral forming method of fiber-reinforced resin matrix compound material pipe provided by the invention, mainly comprises the following steps:
Step one, lays fiber cloth according to the laying scheme of design, adopts setting agent to shape between scrim cloth; Or adopt knitting forming or winding shaping process to prepare composite tube prefabricated component according to designing requirement;
Step 2, after composite tube prefabricated component is put into mould, location conjunction is touched;
Step 3, start resin by injection in mould and fill prefabricated component, Real-Time Monitoring injection pressure simultaneously, to ensure injecting glue process stabilization;
Step 4, observes the multiple gum outlets pre-set in mould, when glue spillover appears in one of them or several gum outlet, and in the glue overflowed during bubble-free, then closed, when the gum outlet that last opens wide occurs that glue overflows, then injecting glue completes;
Step 5, when gum outlet overflows glue bubble-free, closes last gum outlet above-mentioned, carries out die cavity pressurize;
Step 6, after pressurize terminates, carries out elevated cure according to the curing process code of resin;
Step 7, after solidification, by mold cools down to room temperature, opens mould afterwards, takes out and has cured shaping fiber-reinforced resin matrix compound material pipe.
Further, the laying scheme described in step one refers to adopt balance and symmetry laying scheme, and surface adopts ± 45 ° of layings, and to meet the smoothness of body structure surface, the concrete laying number of plies, angle, ratio can design according to design objective;
Described knitting forming technique refers to woven, 3 D weaving, and described winding process refers to multi-lay winding technique;
Described setting agent is a kind of macromolecular material, and it has compatibility with the resin for the preparation of fiber-reinforced resin matrix compound material pipe, makes composite tube prefabricated component keep certain globality, is convenient to put into mould;
Described fiber is carbon fiber, glass fibre, Kevlar fiber, boron fibre or string.
Further, the resin described in step 3 is epoxy resin, polyimides, thermoplastic polyurethane, polyamide, polyphenylene sulfide, PAEK or polyvinyl alcohol.
Further, the curing process code described in step 6 refers to the resin of resin often kind of model in whole solidification engineering due code.
A mould for fiber-reinforced resin matrix compound material pipe, comprises upper cover plate 1, encloses frame, core and lower cover 6, described in enclose frame and be enclosed in core peripheral one week, described upper and lower cover plate is arranged on the two ends of core; In described core entirety in cylindric, its upper end is provided with a hole, and this hole is arranged along the axis of core, and communicates with the outside of core; Described enclosing on frame is distributed with some gum outlets 8, and have gap between its inner surface and core, this gap is roughly the same with tube wall thickness; Described upper cover plate 1 is provided with hole for injecting glue 7 with the corresponding position in hole on core, and upper and lower cover plate adopts securing member to be connected with enclosing between frame.
Preferred as one, described core comprises the auxiliary mould core 3 on top and the main core 5 of bottom, side by side mutually by installing between major and minor core, auxiliary mould core 3 is provided with through hole.
Further, described in enclose frame and comprise two, symmetrically arranged left and right and enclose frame, enclose in left and right on the opposite face of frame, one is enclosed on frame and is provided with seal groove 10 wherein, be filled with silica gel material, and gum outlet 8 is distributed in whole enclosing on frame in seal groove 10.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1. the former assembling in the method is simple, easy to clean.Use the fiber-reinforced resin matrix compound material pipe of the plastic different-thickness of core of different size, utilization ratio is high, and optional resin system is various, and applicability is wide.
2. mould is steel construction, and structure is simple, and easy to process, with low cost, mould is reusable, and not yielding, service life is long, pressurize is respond well, ensure that safety in utilization.
3. simple to operate, the safety of the method, wide adaptability, quick compounding, resin even injection, stable, injection pressure is observed by pressure display instrument in forming process, be convenient to control injection pressure, speed, protect even, the stable injection of resin with this, overcome hole, the dry spot of easily generation in forming process and infiltrate uneven phenomenon.
4. preset multiple gum outlets observation panel of holding concurrently can monitor resin flows situation easily, overcomes the hole, the dry spot that easily produce in forming process and infiltrates uneven phenomenon; And according to actual conditions shutoff or open different gum outlet to ensure that prefabricated component fully infiltrates, make end product quality good, overall performance excellence.
Accompanying drawing explanation
Below with reference to accompanying drawing, the invention will be further described:
Fig. 1 is the FB(flow block) of the inventive method;
Fig. 2 is forming die structure general illustration of the present invention;
Fig. 3 is mould of the present invention and composite material prefabricated component generalized section;
Fig. 4 is fiber-reinforced resin matrix compound material shaping round tube glue filling device schematic diagram of the present invention;
Fig. 5 is fiber-reinforced resin matrix compound material shaping round tube part schematic diagram;
Number in the figure title: 1, upper cover plate, 2, a left side encloses frame, 3, auxiliary mould core, 4, frame is enclosed on the right side, and 5, main core, 6, lower cover, 7, gum-injecting port, 8, gum outlet, 9, enclose frame seal groove, 10, cover plate for sealing groove, 11, composite tube prefabricated component, 12, support, 13, pressure display instrument, 14, spiral charger, 15, pressure sensor, 16, piston, 17, injecting glue tank, 18, fiber-reinforced resin matrix compound material shaping round tube part.
Detailed description of the invention
The invention provides a kind of mould and mould of fiber-reinforced resin matrix compound material pipe, for making object of the present invention, clearly, clearly, and the present invention is described in more detail with reference to accompanying drawing examples for technical scheme and effect.Should be appreciated that concrete enforcement described herein is only in order to explain the present invention, is not intended to limit the present invention.
Flow process of the present invention as shown in Figure 1, first prepare the preformed member of fiber-reinforced resin matrix compound material pipe, put it in mould and locate conjunction and touch, and then injecting resin, observe the plastic emitting each gum outlet of situation rear enclosed and carry out die cavity pressurize, elevated cure afterwards, after solidification, the fiber-reinforced resin matrix compound material pipe of curing molding is taken out in die sinking.
Specific embodiment of the invention step is as follows:
Step one, according to design laying scheme lay fiber cloth, adopt setting agent to shape between scrim cloth; Or adopt reasonably braiding or winding shaping process according to designing requirement, prepare composite tube prefabricated component 9.
Wherein, " the laying scheme of design " described in step one adopts balance and symmetry laying scheme in majority application, and the general employing in surface ± 45 ° of layings, to meet the smoothness of body structure surface, the concrete laying number of plies, angle, ratio can design according to design objective; " knitting forming or winding process " typically refers to woven, 3 D weaving and multi-lay winding technique; " setting agent " is a kind of macromolecular material, need the compatibility had with the resin for the preparation of fiber-reinforced resin matrix compound material pipe 16, styling can be played by applying a small amount of setting agent between scrim cloth, make composite tube prefabricated component keep certain globality, be convenient to put into mould; Fiber can be the one in carbon fiber, glass fibre, Kevlar fiber, boron fibre or string.
Step 2, composite tube prefabricated component put into mould after, location conjunction is touched.
Wherein, " mould " described in step 2 as shown in Figure 2, encloses frame 2 by upper cover plate 1, a left side, auxiliary mould core 3, the right side encloses frame 4, main core 5 and lower cover 6 and form; Enclose in frame 4 on the right side and have seal groove 9, in upper cover plate 1 and lower cover 6, have seal groove 10, all adopt silica gel material to seal; Upper cover plate 1 has gum-injecting port 7, a left side is enclosed frame 2 and the right side and is enclosed frame 4 distribution and have 4 gum outlets 8.Put into the inner chamber of prefabricated component 11 after auxiliary mould core 3 and main core 5 being fitted, a left side is enclosed frame 2 and is enclosed frame 4 with the right side and fit, and adopts bolt by its compact siro spinning technology; Main core 5 and lower cover 6 are fitted, and frame 2 is enclosed on lower cover 6 and a left side, the right side is enclosed after frame 4 is fitted and adopted screw by its compact siro spinning technology again; Frame 2 is enclosed on upper cover plate 1 and a left side, the right side is enclosed after frame 4 is fitted and also adopted screw by its compact siro spinning technology, does not fit between upper cover plate 1 and auxiliary mould core 3, keeps certain interval, makes to make resin smooth flow in prefabricated component 11 during injecting glue; Location conjunction touches rear mold section as shown in Figure 3.
Step 3, employing glue filling device start resin by injection in mould and fill prefabricated component; Numerical value simultaneously in Real Time Observation pressure display instrument 13 to monitor injection pressure, to ensure injecting glue process stabilization.
Wherein, " glue filling device " described in step 3 as shown in Figure 4, this device comprises support 12, pressure display instrument 13, spiral charger 14, pressure sensor 15, piston 16, injecting glue tank 17; Its concrete injecting glue process is for loading for employing spiral charger 14, record injection pressure by pressure sensor 15 to be shown by pressure display instrument 13, be easy to experimenter monitor load condition and adjust in time, resin flows in mould via injecting glue tank 17, completes injecting glue after soaking into composite tube prefabricated component 11; " resin " can be the one in epoxy resin, polyimides, thermoplastic polyurethane, polyamide, polyphenylene sulfide, PAEK or polyvinyl alcohol.
The multiple gum outlets 8 pre-set in step 4, observation mould, when glue spillover appears in one of them or several gum outlet, and when in the glue overflowed, air bubble content is less, then closed, when the gum outlet that last opens wide occurs that glue overflows, then judge that injecting glue completes.
When step 5, gum outlet overflow glue bubble-free, after closing last gum outlet above-mentioned, carry out die cavity pressurize.
After step 6, pressurize terminate, carry out elevated cure according to the curing process code of resin.
Wherein, " curing process code " in step 6 refers to the regulation to resin related process parameters in whole solidification engineering, and the resin of often kind of model is all to there being the code matched with it.
After step 7, solidification, by mold cools down to room temperature, open mould afterwards, take out and have cured shaping fiber-reinforced resin matrix compound material pipe 18, as shown in Figure 5.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. an integral forming method for fiber-reinforced resin matrix compound material pipe, is characterized in that mainly comprising the following steps:
Step one, lays fiber cloth according to the laying scheme of design, adopts setting agent to shape between scrim cloth; Or adopt knitting forming or winding shaping process to prepare composite tube prefabricated component according to designing requirement;
Step 2, after composite tube prefabricated component is put into mould, location conjunction is touched;
Step 3, start resin by injection in mould and fill prefabricated component, Real-Time Monitoring injection pressure simultaneously, to ensure injecting glue process stabilization;
Step 4, observes the multiple gum outlets pre-set in mould, when glue spillover appears in one of them or several gum outlet, and in the glue overflowed during bubble-free, then closed, when the gum outlet that last opens wide occurs that glue overflows, then injecting glue completes;
Step 5, when gum outlet overflows glue bubble-free, closes last gum outlet above-mentioned, carries out die cavity pressurize;
Step 6, after pressurize terminates, carries out elevated cure according to the curing process code of resin;
Step 7, after solidification, by mold cools down to room temperature, opens mould afterwards, takes out and has cured shaping fiber-reinforced resin matrix compound material pipe.
2. the integral forming method of a kind of fiber-reinforced resin matrix compound material pipe according to claim 1, it is characterized in that, laying scheme described in step one refers to adopt balance and symmetry laying scheme, and surface adopts ± 45 ° of layings, to meet the smoothness of body structure surface, the concrete laying number of plies, angle, ratio can design according to design objective;
Described knitting forming technique refers to woven, 3 D weaving, and described winding process refers to multi-lay winding technique;
Described setting agent is a kind of macromolecular material, and it has compatibility with the resin for the preparation of fiber-reinforced resin matrix compound material pipe, makes composite tube prefabricated component keep certain globality, is convenient to put into mould;
Described fiber is carbon fiber, glass fibre, Kevlar fiber, boron fibre or string.
3. the integral forming method of a kind of fiber-reinforced resin matrix compound material pipe according to claim 1, it is characterized in that, the resin described in step 3 is epoxy resin, polyimides, thermoplastic polyurethane, polyamide, polyphenylene sulfide, PAEK or polyvinyl alcohol.
4. the integral forming method of a kind of fiber-reinforced resin matrix compound material pipe according to claim 1, is characterized in that, the curing process code described in step 6 refers to the resin of resin often kind of model in whole solidification engineering due code.
5. a mould for fiber-reinforced resin matrix compound material pipe, is characterized in that, comprises upper cover plate (1), encloses frame, core and lower cover (6), described in enclose frame and be enclosed in core peripheral one week, described upper and lower cover plate is arranged on the two ends of core; In described core entirety in cylindric, its upper end is provided with a hole, and this hole is arranged along the axis of core, and communicates with the outside of core; Described enclosing on frame is distributed with some gum outlets (8), and have gap between its inner surface and core, this gap is roughly the same with tube wall thickness; On the upper and core of described upper cover plate (1), the corresponding position in hole is provided with hole for injecting glue (7), and upper and lower cover plate adopts securing member to be connected with enclosing between frame.
6. the mould of a kind of fiber-reinforced resin matrix compound material pipe according to claim 5, it is characterized in that, described core comprises the auxiliary mould core (3) on top and the main core (5) of bottom, side by side mutually by installing between major and minor core, auxiliary mould core (3) is provided with through hole.
7. the mould of a kind of fiber-reinforced resin matrix compound material pipe according to claim 5, it is characterized in that, the described frame that encloses comprises two, symmetrically arranged left and right and encloses frame, enclose in left and right on the opposite face of frame, one is enclosed on frame and is provided with seal groove (10) wherein, seal groove is filled with silica gel material in (10), and gum outlet (8) is distributed in whole enclosing on frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510850659.0A CN105398064A (en) | 2015-11-30 | 2015-11-30 | Integral molding method and molding die for fiber-reinforced resin-based composite round pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510850659.0A CN105398064A (en) | 2015-11-30 | 2015-11-30 | Integral molding method and molding die for fiber-reinforced resin-based composite round pipe |
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Cited By (12)
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| CN105965746A (en) * | 2016-04-28 | 2016-09-28 | 黄斌 | Full-automatic continuous cylinder molding device |
| CN107379578A (en) * | 2017-07-31 | 2017-11-24 | 株洲时代新材料科技股份有限公司 | A kind of forming method of contact net support meanss |
| CN107443772A (en) * | 2017-07-26 | 2017-12-08 | 南京航空航天大学 | A kind of mould and its process suitable for composite tube RTM shapings |
| CN107512401A (en) * | 2017-07-21 | 2017-12-26 | 中国航空工业集团公司基础技术研究院 | A kind of preparation method of composite driver |
| CN108407336A (en) * | 2018-02-24 | 2018-08-17 | 航天特种材料及工艺技术研究所 | A kind of stereo fabric enhancing phenolic resin composite and preparation method |
| CN112793050A (en) * | 2021-02-03 | 2021-05-14 | 上海自图新材料科技有限公司 | Integrated forming die and integrated forming method for pipeline containing membrane lining composite material |
| CN113021943A (en) * | 2021-03-10 | 2021-06-25 | 广州雷迅创新科技股份有限公司 | Composite material bent sheet forming method and die |
| CN113799414A (en) * | 2021-09-01 | 2021-12-17 | 上海复合材料科技有限公司 | Large-scale grid cylinder and vacuum-assisted RTM (resin transfer molding) method thereof |
| CN113844059A (en) * | 2021-10-14 | 2021-12-28 | 河北恒瑞复合材料有限公司 | Method for producing a fibre-reinforced plastic pipe section module and pipe section module |
| CN113954272A (en) * | 2021-10-29 | 2022-01-21 | 开封市新亚实业有限公司 | Mold and method for manufacturing special-shaped composite material rotary body by using same |
| CN114247729A (en) * | 2021-11-30 | 2022-03-29 | 陈文娟 | Method for quickly making bricks by using construction wastes |
| CN114289270A (en) * | 2022-03-11 | 2022-04-08 | 北京理工大学 | Method for detecting and adjusting impregnation liquid level of circular tube containing epoxy resin |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105965746A (en) * | 2016-04-28 | 2016-09-28 | 黄斌 | Full-automatic continuous cylinder molding device |
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| CN107443772A (en) * | 2017-07-26 | 2017-12-08 | 南京航空航天大学 | A kind of mould and its process suitable for composite tube RTM shapings |
| CN107379578A (en) * | 2017-07-31 | 2017-11-24 | 株洲时代新材料科技股份有限公司 | A kind of forming method of contact net support meanss |
| CN107379578B (en) * | 2017-07-31 | 2019-09-27 | 株洲时代新材料科技股份有限公司 | A kind of forming method of contact net support device |
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