CN105690803A - Vacuum thermal expansion molding process for composite - Google Patents
Vacuum thermal expansion molding process for composite Download PDFInfo
- Publication number
- CN105690803A CN105690803A CN201610027401.5A CN201610027401A CN105690803A CN 105690803 A CN105690803 A CN 105690803A CN 201610027401 A CN201610027401 A CN 201610027401A CN 105690803 A CN105690803 A CN 105690803A
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- China
- Prior art keywords
- wind pipe
- nylon wind
- expansion molding
- composite
- prepreg fabric
- Prior art date
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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
- B29C70/40—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
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
-
- 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
Abstract
The invention discloses a vacuum thermal expansion molding process for a composite. The vacuum thermal expansion molding process comprises the following steps: cutting out the sizes of a prepreg fabric and an expanding core material or a nylon wind pipe; laying up the prepreg fabric according to design requirements of mechanics, and coating the expanding core material or the nylon wind pipe with the prepreg fabric to form a preform; placing the preform into a cavity of a die and performing die assembly and locking; vacuumizing to enable the cavity of the die and the preform in the cavity of the die to be in a negative-pressure state; (as for the nylon wind pipe, after inflation for supercharging of the nylon wind pipe) heating and keeping the temperature of the die, and maintaining the corresponding temperature and time according to curing parameters of resin in the prepreg fabric to ensure curing of the preform; and cooling down the die, degassing to eliminate negative pressure and return to the ambient atmosphere (as for the nylon wind pipe, degassing to return the nylon wind pipe to the ambient atmosphere), opening the die and taking out the molded composite product. The vacuum thermal expansion molding process for the composite can realize continuous integral-forming production, and is low in cost and environment-friendly, and the obtained product is favorable in appearance and high in strength.
Description
Technical field
The present invention relates to composite material process planning, particularly relate to composite Vacuum Heat expansion molding technique。
Background technology
It is widely used in every field with its superior physical property, including Leisure Sport equipment, Aero-Space and commercial Application with the goods that the composites such as carbon fibre, glass are raw material。Current carbon fibre material has been generalized to the aspects such as tennis racket, racket, bicycle, winter sports equipment, Boating-used equipment from Herba Veronicastri and golf club；The military aircraft of high-strength light requirement, commercial aircraft, unmanned plane etc. it are mainly used in Aero-Space；Commercial Application is concentrated mainly on auto parts machinery, blower fan, pressure vessel etc.。
Existing die press technology for forming, owing to the gas in goods is difficult to discharge in forming process, hole easily occurs inside the goods after molding, product surface easily produces the problems such as pin hole, starved, smelly head, aberration, appearance is bad, generally require follow-up polishing benefit soil etc. and improve the repair procedure of outward appearance, increase the input of human cost and the risk of environmental pollution。
Summary of the invention
It is an object of the invention to provide one can the one-body molded production of serialization, low cost, environmental protection, resulting product good appearance, the composite Vacuum Heat expansion molding technique that intensity is high。
For achieving the above object, the present invention provides a kind of composite Vacuum Heat expansion molding technique, it is characterised in that step is,
1) prepared by precast body
A, according to Structural Design Requirement cutting prepreg fabric and expanding material core or nylon wind pipe size；
B, according to mechanics designing requirement by prepreg fabric laying, be coated on the outside of expanding material core or nylon wind pipe；
2) above-mentioned precast body being put into cavity body of mould, matched moulds is locked；
3) evacuation makes die cavity and precast body therein be in negative pressure state；
4) situation one adopts expanding material core, and mould is heated insulation, maintains corresponding temperature and time according to the cure parameter of the resin contained in prepreg fabric, makes precast body solidify；Situation two adopts nylon wind pipe, nylon wind pipe is inflated supercharging, then mould is heated insulation, maintain corresponding temperature and time according to the cure parameter of the resin contained in prepreg fabric, make precast body solidify；
5) cooling mould, venting eliminates negative pressure and returns to ambient atmosphere pressure, if there being employing nylon wind pipe inflation, nylon wind pipe being unloaded gas simultaneously and returning to ambient atmosphere pressure, opens the composite product after mould takes out molding。
Further, described prepreg fabric is the multiple material prepreg of carbon fiber or the multiple material prepreg of glass fibre。
Further, the startup of described expanding material expansion temperature 60-230 DEG C, volume multiplying power 1-50 times before and after expanding, the pressure limit 0.1-20MPa produced after expansion。
Further, described step 3) in negative pressure state, refer to vacuum > 0.1Pa；Preferably, vacuum is 1～100KPa。
Further, described step 4) in mold temperature is risen to 150 DEG C by room temperature, heating rate is 10～100 DEG C/min, 150 DEG C of insulation 10～120min。
Further, described step 4) in nylon wind pipe is inflated supercharging, pressure is 0.1～10MPa。
Further, described step 5) in cooling rate of temperature fall be 10～50 DEG C/min。
Negative pressure state of the present invention, refer to vacuum > 0.1Pa, preferable range 1～100KPa, the air that the effect of evacuation is brought into when being and get rid of composite interlayer seam gap pre-shaped before the forming is trapped in forming process in goods or moves to product surface and affects outward appearance。
Gas, after follow-up expanding material adds thermal expansion, is got rid of by the present invention, eliminates the problems such as the pin hole of product surface, starved, smelly head, aberration further, makes quality of item better。
The startup of described expanding material expansion temperature 60-230 DEG C, volume multiplying power 1-50 times before and after expanding, the pressure limit 0.1-20MPa produced after expansion。It is full of mould cavity space after expanding material expanded by heating, the multiple material of fiber is produced pressure, make the multiple material Coating combination of fiber more tight, and then improve product strength。From the process chart of Fig. 1 it can be seen that intumescent material swells, it is filled with mould cavity space。
The invention have the advantages that
1, this technique can obtain excellent products appearance, overcomes the problems such as the pin hole of traditional handicraft product surface, starved, smelly head, aberration；
2, obtain high-quality products appearance, thus earth process is mended in polishing after saving, save human input cost；Decreasing the environmental pollution harm to workman, the working environment of workman is friendly, environmental protection simultaneously；
3, the goods that this moulding process obtains, internal porosity is few, and intensity is higher, good appearance；
4 compare with traditional interior inflation air pressure forming, greatly improve yields, it may be achieved the one-body molded production of serialization；
The resin glue of 5, traditional HP-RTM technique is to adopt the method that injection is entered to need high pressure, and equipment is extremely expensive, and the technique of the present invention can save the input of expensive device。
Accompanying drawing explanation
Fig. 1 is present invention process flow chart。
Detailed description of the invention
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish。The embodiment described below with reference to accompanying drawing is illustrative of, it is intended to is used for explaining the present invention, and is not considered as limiting the invention。Unreceipted concrete technology or condition person in embodiment, technology or condition described by the document in this area or carry out according to product description。Agents useful for same or the unreceipted production firm person of instrument, be can pass through city available from conventional products。
In conjunction with the process chart of Fig. 1, implementing following example, wherein 1 is mold, and 2 is lower mold, and 3 is sealing ring, and 4 is prepreg fabric, and 5 is expanding material or nylon wind pipe。
Embodiment 1:
First it is prepare precast body, illustrate with the sample in Fig. 1, according to the multiple material prepreg fabric of Structural Design Requirement cutting fiber and EPS (expandablepolystyrene, expanded polystyrene (EPS)) core (being prefabricated into core according to goods mould) size, according to mechanics designing requirement by multiple for fiber material prepreg fabric laying, it is coated on the outside of EPS core, put into well according to mould pre-shaped, in lower mold cavity, closed die locking ensures that the effect of sealing ring forms good air-tightness, then die cavity and precast body therein are evacuated to 50KPa, mold temperature is risen to 150 DEG C by room temperature, heating rate is 50 DEG C/min, 150 DEG C of insulation 20min, now EPS starts expansion generation pressure along with temperature raises, thus improving composite interlayer adhesion, resin is fully cured, then cool down, rate of temperature fall is 50 DEG C/min, it is down to room temperature, venting returns to ambient atmosphere pressure, open mould and take out goods, the perfect sunken bubble-free of product surface。
Embodiment 2:
For the multiple material goods of the carbon fibre of labyrinth, first it is according to labyrinth designing requirement cutting carbon fiber prepreg fabric and EVA (ethylene-vinylacetatecopolymer, ethylene-vinyl acetate copolymer) core (being prefabricated into core according to goods mould) size, according to mechanics designing requirement by staggered for carbon fiber prepreg fabric laying, it is coated on the outside of EVA core, goods are put into die cavity well according to mold cavity shapes pre-shaped and lock, then die cavity and precast body therein are evacuated to 1KPa, mold temperature is risen to 150 DEG C by room temperature, heating rate is 10 DEG C/min, 150 DEG C of insulation 10min, now EVA starts expansion generation pressure along with temperature raises, thus improving composite interlayer adhesion, resin is fully cured, then cool down, rate of temperature fall is 50 DEG C/min, it is down to room temperature, venting returns to ambient atmosphere pressure, open mould and take out goods, the perfect sunken bubble-free of product surface。
Embodiment 3:
For the multiple material goods of the carbon fibre of labyrinth, first it is according to labyrinth designing requirement cutting carbon fiber prepreg fabric and EPS core (being prefabricated into core according to goods mould) size, according to mechanics designing requirement by staggered for carbon fiber prepreg fabric laying, it is coated on the outside of EPS core, goods are put into die cavity well according to mold cavity shapes pre-shaped and lock, then unitary mould and precast body therein are placed in vacuum bag, carry out being evacuated to 100KPa, mold temperature is risen to 150 DEG C by room temperature, heating rate is 100 DEG C/min, 150 DEG C of insulation 20min, now EPS starts expansion generation pressure along with temperature raises, thus improving composite interlayer adhesion, resin is fully cured, then cool down, rate of temperature fall is 10 DEG C/min, it is down to room temperature, venting returns to ambient atmosphere pressure, open mould and take out goods, the perfect sunken bubble-free of product surface。
Embodiment 4:
For the multiple material goods of the carbon fibre of labyrinth, first it is according to labyrinth designing requirement cutting carbon fiber prepreg fabric and high-energy rubber (that green wood of taking pride in) core (being prefabricated into core according to goods mould) size, according to mechanics designing requirement by staggered for carbon fiber prepreg fabric laying, it is coated on the outside of high-energy rubber core, goods are put into die cavity well according to mold cavity shapes pre-shaped and lock, then die cavity and precast body therein are evacuated to 0.5KPa, mold temperature is risen to 150 DEG C by room temperature, heating rate is 50 DEG C/min, 150 DEG C of insulation 120min, now high-energy rubber starts expansion generation pressure along with temperature raises, thus improving composite interlayer adhesion, resin is fully cured, then cool down, rate of temperature fall is 50 DEG C/min, it is down to room temperature, venting returns to ambient atmosphere pressure, open mould and take out goods, the perfect sunken bubble-free of product surface。
Embodiment 5:
For the multiple material goods of the carbon fibre of labyrinth, first it is according to labyrinth designing requirement cutting carbon fiber prepreg fabric and nylon wind pipe size, according to mechanics designing requirement by staggered for carbon fiber prepreg fabric laying, it is coated on the outside of nylon wind pipe, goods are put into die cavity well according to mold cavity shapes pre-shaped and lock, then die cavity and precast body therein are evacuated to 0.5KPa, it is inflated being pressurized to 1MPa to nylon wind pipe, mold temperature is risen to 150 DEG C by room temperature, heating rate is 50 DEG C/min, 150 DEG C of insulation 120min, now high-energy rubber starts expansion generation pressure along with temperature raises, thus improving composite interlayer adhesion, resin is fully cured, then cool down, rate of temperature fall is 50 DEG C/min, it is down to room temperature, venting, nylon wind pipe is unloaded gas and returns to ambient atmosphere pressure, open mould and take out goods, the perfect sunken bubble-free of product surface。
Embodiment 6:
For the multiple material goods of the carbon fibre of labyrinth, first it is according to labyrinth designing requirement cutting carbon fiber prepreg fabric and nylon wind pipe size, according to mechanics designing requirement by staggered for carbon fiber prepreg fabric laying, it is coated on the outside of nylon wind pipe, goods are put into die cavity well according to mold cavity shapes pre-shaped and lock, then die cavity and precast body therein are evacuated to 0.5KPa, it is inflated being pressurized to 0.1MPa to nylon wind pipe, mold temperature is risen to 150 DEG C by room temperature, heating rate is 80 DEG C/min, 150 DEG C of insulation 80min, now high-energy rubber starts expansion generation pressure along with temperature raises, thus improving composite interlayer adhesion, resin is fully cured, then cool down, rate of temperature fall is 50 DEG C/min, it is down to room temperature, venting, nylon wind pipe is unloaded gas and returns to ambient atmosphere pressure, open mould and take out goods, the perfect sunken bubble-free of product surface。
Embodiment 7:
For the multiple material goods of the carbon fibre of labyrinth, first it is according to labyrinth designing requirement cutting carbon fiber prepreg fabric and nylon wind pipe size, according to mechanics designing requirement by staggered for carbon fiber prepreg fabric laying, it is coated on the outside of nylon wind pipe, goods are put into die cavity well according to mold cavity shapes pre-shaped and lock, then die cavity and precast body therein are evacuated to 0.5KPa, it is inflated being pressurized to 10MPa to nylon wind pipe, mold temperature is risen to 150 DEG C by room temperature, heating rate is 50 DEG C/min, 150 DEG C of insulation 100min, now high-energy rubber starts expansion generation pressure along with temperature raises, thus improving composite interlayer adhesion, resin is fully cured, then cool down, rate of temperature fall is 30 DEG C/min, near room temperature, venting, nylon wind pipe is unloaded gas and returns to ambient atmosphere pressure, open mould and take out goods, the perfect sunken bubble-free of product surface。
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is illustrative of, being not considered as limiting the invention, above-described embodiment can be changed when without departing from principles of the invention and objective, revises, replace and modification by those of ordinary skill in the art within the scope of the invention。
Claims (7)
1. a composite Vacuum Heat expansion molding technique, it is characterised in that step is,
1) prepared by precast body
A, according to Structural Design Requirement cutting prepreg fabric and expanding material core or nylon wind pipe size；
B, according to mechanics designing requirement by prepreg fabric laying, be coated on the outside of expanding material core or nylon wind pipe；
2) above-mentioned precast body being put into cavity body of mould, matched moulds is locked；
3) evacuation makes die cavity and precast body therein be in negative pressure state；
4) if during expanding material core, mould is heated insulation, maintains corresponding temperature and time according to the cure parameter of the resin contained in prepreg fabric, make precast body solidify；If during nylon wind pipe, nylon wind pipe is inflated supercharging, then mould is heated insulation, maintain corresponding temperature and time according to the cure parameter of the resin contained in prepreg fabric, make precast body solidify；
5) cooling mould, venting eliminates negative pressure and returns to ambient atmosphere pressure, if nylon wind pipe is then unloaded gas by nylon wind pipe returns to ambient atmosphere pressure simultaneously, opens the composite product after mould takes out molding。
2. composite Vacuum Heat expansion molding technique as claimed in claim 1, it is characterised in that described prepreg fabric is the multiple material prepreg of carbon fiber or the multiple material prepreg of glass fibre。
3. composite Vacuum Heat expansion molding technique as claimed in claim 1, it is characterised in that the startup of described expanding material expansion temperature 60-230 DEG C, volume multiplying power 1-50 times before and after expanding, the pressure limit 0.1-20MPa produced after expansion。
4. as claimed in claim 1 composite Vacuum Heat expansion molding technique, it is characterised in that described step 3) in negative pressure state, refer to vacuum > 0.1Pa；Preferably, vacuum is 1～100KPa。
5. as claimed in claim 1 composite Vacuum Heat expansion molding technique, it is characterised in that described step 4) in mold temperature is risen to 150 DEG C by room temperature, heating rate is 10～100 DEG C/min, 150 DEG C of insulation 10～120min。
6. as claimed in claim 1 composite Vacuum Heat expansion molding technique, it is characterised in that described step 4) in nylon wind pipe is inflated supercharging, pressure is 0.1～10MPa。
7. as claimed in claim 1 composite Vacuum Heat expansion molding technique, it is characterised in that described step 5) in the rate of temperature fall of cooling be 10～50 DEG C/min。
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| CN201610027401.5A CN105690803B (en) | 2016-01-15 | 2016-01-15 | A kind of composite Vacuum Heat expansion molding technique |
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| CN201610027401.5A CN105690803B (en) | 2016-01-15 | 2016-01-15 | A kind of composite Vacuum Heat expansion molding technique |
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| CN105690803B CN105690803B (en) | 2018-01-16 |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106730688A (en) * | 2017-01-10 | 2017-05-31 | 桐乡波力科技复材用品有限公司 | Reeded wall ball racket of inside casing band and preparation method thereof |
| CN106827587A (en) * | 2017-01-22 | 2017-06-13 | 厦门市豪尔新材料股份有限公司 | The forming method of application and its wing of the HSM techniques in wing shaping |
| CN107399091A (en) * | 2017-07-11 | 2017-11-28 | 北京汽车集团有限公司 | Special-shaped composite shaft, its preparation method and the connection method with metal flange |
| CN107415281A (en) * | 2017-09-27 | 2017-12-01 | 厦门市豪尔新材料股份有限公司 | A kind of method that table tennis bat is prepared using HSM moulding process |
| CN107487002A (en) * | 2017-09-27 | 2017-12-19 | 厦门市豪尔新材料股份有限公司 | A kind of method that quant is prepared using HSM moulding process |
| CN107487003A (en) * | 2017-09-27 | 2017-12-19 | 厦门市豪尔新材料股份有限公司 | A kind of multiple material product of fiber of high-strength light uses two one step preparation methods of the prefabricated core of the hot self-expandings of HSM |
| CN107584782A (en) * | 2017-09-27 | 2018-01-16 | 厦门市豪尔新材料股份有限公司 | A kind of multiple material automobile buffer beam of carbon fiber and its HSM moulding process |
| CN107718604A (en) * | 2017-09-27 | 2018-02-23 | 厦门市豪尔新材料股份有限公司 | A kind of method that ice curved bar is prepared using HSM moulding process |
| CN107718603A (en) * | 2017-09-27 | 2018-02-23 | 厦门市豪尔新材料股份有限公司 | A kind of HSM manufacturing process of the armed lever of carbon fiber mechanical arm |
| CN107901449A (en) * | 2017-11-13 | 2018-04-13 | 厦门市豪尔新材料股份有限公司 | A kind of preparation method of the multiple material structure of the high-energy rubber rigid foam of high-strength light |
| CN108353862A (en) * | 2018-02-10 | 2018-08-03 | 湖南狼图腾碳纤维科技有限公司 | A kind of preparation method of hollow carbon fiber buoy |
| CN110254000A (en) * | 2019-07-09 | 2019-09-20 | 厦门市中豪强碳纤复合材料有限公司 | A kind of sandwich insulating bar and preparation method thereof |
| CN111016533A (en) * | 2019-12-31 | 2020-04-17 | 东莞艾可迅复合材料有限公司 | Hollow carbon fiber wheel hub and manufacturing method thereof |
| CN111333980A (en) * | 2018-12-18 | 2020-06-26 | 航天特种材料及工艺技术研究所 | Fluororubber and thermal expansion forming method |
| CN114211776A (en) * | 2021-12-13 | 2022-03-22 | 厦门市中豪强碳纤复合材料有限公司 | Manufacturing method for composite molding of carbon fiber support |
| WO2024007417A1 (en) * | 2022-07-06 | 2024-01-11 | 厦门鸿基伟业复材科技有限公司 | Forming mold and method for carbon fiber composite material |
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| CN106730688A (en) * | 2017-01-10 | 2017-05-31 | 桐乡波力科技复材用品有限公司 | Reeded wall ball racket of inside casing band and preparation method thereof |
| CN106827587A (en) * | 2017-01-22 | 2017-06-13 | 厦门市豪尔新材料股份有限公司 | The forming method of application and its wing of the HSM techniques in wing shaping |
| WO2018133177A1 (en) * | 2017-01-22 | 2018-07-26 | 厦门市豪尔新材料股份有限公司 | Application of hsm process in wing moulding and method for moulding wing |
| CN107399091A (en) * | 2017-07-11 | 2017-11-28 | 北京汽车集团有限公司 | Special-shaped composite shaft, its preparation method and the connection method with metal flange |
| CN107399091B (en) * | 2017-07-11 | 2019-09-06 | 北京汽车集团有限公司 | Special-shaped composite shaft, preparation method and the connection method with metal flange |
| CN107487003A (en) * | 2017-09-27 | 2017-12-19 | 厦门市豪尔新材料股份有限公司 | A kind of multiple material product of fiber of high-strength light uses two one step preparation methods of the prefabricated core of the hot self-expandings of HSM |
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| CN107718604A (en) * | 2017-09-27 | 2018-02-23 | 厦门市豪尔新材料股份有限公司 | A kind of method that ice curved bar is prepared using HSM moulding process |
| CN107718603A (en) * | 2017-09-27 | 2018-02-23 | 厦门市豪尔新材料股份有限公司 | A kind of HSM manufacturing process of the armed lever of carbon fiber mechanical arm |
| CN107584782A (en) * | 2017-09-27 | 2018-01-16 | 厦门市豪尔新材料股份有限公司 | A kind of multiple material automobile buffer beam of carbon fiber and its HSM moulding process |
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| CN107584782B (en) * | 2017-09-27 | 2019-09-10 | 厦门市豪尔新材料股份有限公司 | A kind of carbon fiber answers material automobile buffer beam and its HSM moulding process |
| CN107415281A (en) * | 2017-09-27 | 2017-12-01 | 厦门市豪尔新材料股份有限公司 | A kind of method that table tennis bat is prepared using HSM moulding process |
| CN107901449A (en) * | 2017-11-13 | 2018-04-13 | 厦门市豪尔新材料股份有限公司 | A kind of preparation method of the multiple material structure of the high-energy rubber rigid foam of high-strength light |
| CN108353862A (en) * | 2018-02-10 | 2018-08-03 | 湖南狼图腾碳纤维科技有限公司 | A kind of preparation method of hollow carbon fiber buoy |
| CN111333980A (en) * | 2018-12-18 | 2020-06-26 | 航天特种材料及工艺技术研究所 | Fluororubber and thermal expansion forming method |
| CN111333980B (en) * | 2018-12-18 | 2022-08-09 | 航天特种材料及工艺技术研究所 | Fluororubber and thermal expansion forming method |
| CN110254000A (en) * | 2019-07-09 | 2019-09-20 | 厦门市中豪强碳纤复合材料有限公司 | A kind of sandwich insulating bar and preparation method thereof |
| CN111016533A (en) * | 2019-12-31 | 2020-04-17 | 东莞艾可迅复合材料有限公司 | Hollow carbon fiber wheel hub and manufacturing method thereof |
| CN114211776A (en) * | 2021-12-13 | 2022-03-22 | 厦门市中豪强碳纤复合材料有限公司 | Manufacturing method for composite molding of carbon fiber support |
| WO2024007417A1 (en) * | 2022-07-06 | 2024-01-11 | 厦门鸿基伟业复材科技有限公司 | Forming mold and method for carbon fiber composite material |
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