Microwave curing formation method for carbon fiber/epoxy resin composite materials and laminated plate made of composite materials

An epoxy resin layer and epoxy resin technology, which is applied in the field of carbon fiber/epoxy resin composite laminates and vacuum bag pressure microwave curing forming, can solve the problems of no composite material system, no mention of process parameters, etc., and achieve curing. The effect of shortened process cycle, avoidance of curing pressure loss, and smooth surface

Active Publication Date: 2017-01-04
COMAC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent whose publication number is CN102729490, the patent whose publication number is CN103057013 and the patent whose publication number is CN103192536 all relate to the processing device and method of microwave-cured fiber-reinforced resin-based composite materials. In the past,

Method used

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  • Microwave curing formation method for carbon fiber/epoxy resin composite materials and laminated plate made of composite materials
  • Microwave curing formation method for carbon fiber/epoxy resin composite materials and laminated plate made of composite materials

Examples

Experimental program
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Effect test

Embodiment 1

[0024] refer to figure 1 and figure 2 , so that the carbon fibers are arranged along the length direction, and the T800 carbon fiber / epoxy resin prepreg is laid up into 12 layers of 18cm (length) × 8cm (width) unidirectional carbon fiber / epoxy resin prepreg laminates 6; A good carbon fiber / epoxy resin prepreg laminate 6 is pasted with an isolation film 5 made of polyimide on the upper and lower sides, placed between two flat molds 7 made of quartz glass plates, and then placed in a polyimide In a vacuum bag 3 made of imide film, the vacuum bag 3 is completely sealed with a vacuum bag sealing tape 4 and placed on a heat insulation board 8 . In a microwave device with a frequency of 2.45 GHz, the vacuum bag 3 is first vacuumed for 40 minutes, so that the carbon fiber / epoxy resin prepreg laminate 6 in the vacuum bag 3 is compacted at about one atmospheric pressure; Tube 9 carries out vacuuming operation, and while vacuumizing, start microwave equipment (as an example, microwav...

Embodiment 2

[0026] refer to figure 1 and figure 2 , so that the carbon fibers are arranged along the length direction, and the T800 carbon fiber / epoxy resin prepreg is laid up into 14 layers of 20cm (length) × 8cm (width) unidirectional carbon fiber / epoxy resin prepreg laminates 6; A good carbon fiber / epoxy resin prepreg laminate 6 is pasted with an isolation film 5 made of polyimide on the upper and lower sides, placed between two flat molds 7 made of quartz glass plates, and then placed in a polyimide In a vacuum bag 3 made of imide film, the vacuum bag 3 is completely sealed with a vacuum bag sealing tape 4 and placed on a heat insulation board 8 . In a microwave device with a frequency of 2.45GHz, first vacuumize the vacuum bag 3 for 50 minutes, so that the carbon fiber / epoxy resin prepreg laminate 6 in the vacuum bag 3 is compacted at about one atmospheric pressure; Tube 9 carries out vacuuming operation, and while vacuumizing, start microwave equipment (as an example, microwave e...

Embodiment 3

[0028] refer to figure 1 and figure 2 , so that the carbon fibers are arranged along the length direction, and the T700 carbon fiber / epoxy resin prepreg is laid up into 18 layers of 18cm (length) × 10cm (width) unidirectional carbon fiber / epoxy resin prepreg laminates 6; A good carbon fiber / epoxy resin prepreg laminate 6 is pasted with an isolation film 5 made of polyimide on the upper and lower sides, placed between two flat molds 7 made of polytetrafluoroethylene flat plates, and then placed in a The vacuum bag 3 made of polyimide film is completely sealed with a vacuum bag sealing tape 4 and placed on a heat insulation board 8 . In a microwave device with a frequency of 2.45GHz, first vacuumize the vacuum bag 3 for 50 minutes, so that the carbon fiber / epoxy resin prepreg laminate 6 in the vacuum bag 3 is compacted at about one atmospheric pressure; Tube 9 carries out vacuuming operation, and while vacuumizing, start microwave equipment (as an example, microwave equipment...

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Abstract

The invention provides a microwave curing formation method for a laminated plate made of carbon fiber/epoxy resin composite materials. The microwave curing formation method for the laminated plate made of the carbon fiber/epoxy resin composite materials comprises the steps that a laid carbon fiber/epoxy resin prepreg laminated plate is placed in a vacuum bag, the upper/lower surface of the laminated plate is isolated from the inner wall of the vacuum bag through a plate mold, and the interior of the vacuum bag is vacuumized, so that the laminated plate is compacted by means of external atmospheric pressure; and then under the condition that the vacuum degree in the vacuum bag is maintained, microwave curing formation is conducted under at least one stepwise-increasing power, wherein the microwave frequency range is 2.25-2.65 GHz, the microwave power range is 40-400 W, and the total microwave radiation time is 50-100 min. In this way, the obtained microwave curing-formed carbon fiber/epoxy resin laminated plate has the characteristics of being smooth in surface and good in forming quality; and meanwhile, compared with a traditional thermocuring method, the cycle of the curing process is obviously shortened while uniform and complete curing is guaranteed, and approximate or higher glass-transition temperature and compression strength are achieved.

Description

technical field [0001] The invention relates to a microwave curing forming method of carbon fiber / epoxy resin composite materials, in particular to a vacuum bag pressure microwave curing forming method of carbon fiber / epoxy prepreg laminates, and the carbon fiber / epoxy resin obtained by this method Resin composite laminate. Background technique [0002] Carbon fiber reinforced epoxy resin-based composite materials have the advantages of high specific strength, high specific stiffness, corrosion resistance, fatigue resistance, vibration reduction and dimensional stability, and are widely used in aerospace, transportation, wind power generation, marine shipbuilding and other industrial fields. Attention and large-scale application. [0003] Generally, the curing of carbon fiber / epoxy composites (such as carbon fiber / epoxy resin prepreg laminates) adopts traditional heat curing methods. However, this thermosetting forming method has problems such as slow heat transfer rate, l...

Claims

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Application Information

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IPC IPC(8): B29C70/34B29C35/08
CPCB29C35/0288B29C35/08B29C70/342
Inventor 陈萍杜善义刘卫平王小群王旭徐学宏闫超蔡群陈璐圆顾灵聪
Owner COMAC
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