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Prepreg/resin transfer molding co-curing process method for composite materials

A technology of resin transfer molding and composite material, applied in the field of composite material molding, can solve the problems of low molding quality and performance, low manufacturing cost, etc., and achieve the effect of high degree of freedom in mold design, reduced manufacturing cost, and low manufacturing cost

Active Publication Date: 2014-08-06
SHANGHAI AIRCRAFT MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high molding efficiency and low manufacturing cost, but its molding quality and performance are lower than the prepreg process

Method used

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  • Prepreg/resin transfer molding co-curing process method for composite materials
  • Prepreg/resin transfer molding co-curing process method for composite materials
  • Prepreg/resin transfer molding co-curing process method for composite materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Composite parts were prepared by prepreg / resin transfer molding co-curing process. The dry fiber is T700 unidirectional carbon fiber cloth, the injection resin is epoxy resin, and the prepreg is T300 carbon fiber / epoxy prepreg. The layup method of prepreg and dry fiber cloth is unidirectional layup[0] 16 . A prepreg blank is placed below the dry fiber preform. The injection pressure during the molding process is 0.2MPa. After the injection is completed, close the glue outlet and the glue inlet, and raise the temperature at 1-2°C / min to 180°C and keep it for 2 hours to complete the curing.

Embodiment 2

[0042] Composite parts were prepared by prepreg / resin transfer molding co-curing process. The dry fiber is unidirectional glass fiber cloth, the injection resin is phenolic resin, and the prepreg is glass fiber / phenolic resin prepreg. The layering method of prepreg is [45 / 0 / -45 / 90 / 45 / 0 / -45 / 0 / 45 / -45], and the layering method of dry fiber cloth is [-45 / 0 / 45 / 90 / -45 / 0 / 0 / 45 / 90 / -45 / 0 / 45]s. A prepreg blank is placed below the dry fiber preform. The injection pressure during the molding process is 0.1MPa. After the injection is completed, close the glue outlet and the glue inlet, and raise the temperature at 1-2°C / min to 180°C and keep it for 3 hours to complete the curing.

Embodiment 3

[0044] Composite parts were prepared by prepreg / resin transfer molding co-curing process. The dry fiber is T800 carbon fiber plain cloth, the injection resin is Shuangma resin, and the prepreg is T800 carbon fiber / Shuangma resin prepreg. The layering method of prepreg is [45 / 0 / -45 / 90 / 0 / 45 / 0 / -45 / 90 / 0 / 45 / 0 / -45 / 0 / 45 / -45], dry fiber cloth The layering method is [-45 / 0 / 45 / 90 / -45 / 0 / 45 / 90 / -45 / 0 / 45 / 90 / -45 / 0 / 45]. A prepreg blank is placed below the dry fiber preform. The injection pressure during the molding process is 0.3MPa. After the injection is completed, close the glue outlet and the glue inlet, and raise the temperature at 1-2°C / min to 210°C and keep it for 5 hours to complete the curing.

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Abstract

The invention discloses a prepreg / resin transfer molding co-curing process method for composite materials. The method comprises the following steps: step 1, tailoring prepregs and dry fibers; step 2, spreading the prepregs and sizing dry fiber preforms; step 3, packaging a mould; step 4, injecting resin and carrying out heat curing; and step 5, demolding a product. The method combines a prepreg process with a resin transfer molding process in the mould. According to the structure features and performance requirements of the product, a composite material blank is formed by the prepregs and the dry fibers, then the resin is injected to impregnate the dry fibers, and finally the composite material product is thermally cured. The co-curing of the prepreg part and the liquid forming part is realized, and therefore, the purpose of efficient low-cost manufacture of the composite material structure is achieved. The method can significantly improve the forming efficiency of the composite material structure, reduce the manufacture cost, improve the quality of products and increase the weight loss benefit and is of great significance to the efficient low-cost manufacture of the composite material structure.

Description

technical field [0001] The invention relates to a molding method for composite materials, more specifically, a co-curing molding process for resin-based composite materials. Background technique [0002] Prepreg is a fiber sheet or its fabric impregnated with a resin matrix. It is an intermediate material for the manufacture of fiber-reinforced resin-based composite materials. The prepreg is cut according to the shape and size of the part, and according to a certain laying direction. and the number of plies to lay up a laminated structure with a certain thickness, and solidify under a certain temperature and pressure to obtain a composite material. The prepared parts have excellent performance, but the prepreg is expensive, and the laying of the prepreg The covering time is longer, the labor intensity is high, the manufacturing cycle is long, and the manufacturing cost is high. Resin transfer molding process is a low-cost manufacturing method of composite materials under de...

Claims

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Application Information

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IPC IPC(8): B29C70/34B29C70/48
CPCB29C70/34B29C70/48
Inventor 张冬梅李敏贾丽杰顾轶卓卢鑫马绪强黄志军李艳霞张佐光
Owner SHANGHAI AIRCRAFT MFG
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