Degradable carbon felt prepreg and manufacturing process of hood inner plate

Abstract

The invention discloses a manufacturing process of a degradable carbon felt prepreg, the degradable carbon felt prepreg and a process for manufacturing a composite automotive hood inner plate by usingthe carbon felt prepreg, and relates to the technical field of automotive covering parts. The process comprises the following steps of step I, adding a RAF-901 resin A component and a B component thickening agent into a series mixer for stirring, and thus obtaining an epoxy resin paste. The carbon felt prepreg obtained by the manufacturing process of the carbon felt prepreg has uniform appearanceand a good demoulding performance, is non-stick, and can meet the low VOC environmental protection requirements of automotive part materials. The carbon felt prepreg which can be cured quickly is used as a raw material to be applied to the process of the composite automotive hood inner plate, the production efficiency of finished products is high, the cycle is short, the cost is low, the qualityis stable, and the automobile lightweight, energy conservation environmental protection are realized.

Description

technical field [0001] The invention relates to the technical field of automobile covers, in particular to a process for manufacturing a degradable carbon felt prepreg, a degradable carbon felt prepreg, and a composite automobile hood inner panel made of a carbon felt prepreg craft. Background technique [0002] Recyclable fiber-reinforced thermosetting materials, referred to as RFRT, with the development of composite material automated mass production technology, the cost of composite material manufacturing has been greatly reduced, and people have a better understanding of the weight-reducing effect of composite materials. The application of composite materials in automobiles is also increasing. Great progress has been made. Most of the existing automotive composite hoods are steel plates, aluminum plates or continuous carbon fiber composite materials. Among the quality of steel plates and aluminum plates, continuous carbon fibers can greatly achieve the goal of weight red...

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Problems solved by technology

[0002] Recyclable fiber-reinforced thermosetting materials, referred to as RFRT, with the development of composite material automated mass production technology, the cost of composite material manufacturing has been greatly reduced, and people have a better understanding of the weight-reducing effect of composite materials. The application of composite materials in automobiles is also increasing. Great progress has been made. Most of the existing automotive composite hoods are steel plates, aluminum plates or continuous carbon fiber composite materials. Among the quality of steel plates and aluminum plates, continuous carbon fibers can greatly achieve the goal of weight reduction, but they still have the following defects: 1. Low efficiency. Traditional processes such as vacuum bagging process and molding process are mainly based on continuous carbon fiber prepreg layup, and the layup takes a long time. According to the complexity of the product, it varies from 4h to 24h. At the same time, the curing time is relatively long 2. High cost, the raw material in the civilian field is continuous fiber fabric prepreg, the material cost is about 120-300 yuan / kg, and the manufacturing cost reaches 5 to 8 times the cost of materials, and the overall cost of the final product is 700 to 1,000 yuan / kg; 3. The quality is not stable, the traditional composite material process is manual laying, and the structure of automobile products is extremely complex, which makes it difficult to lay composite materials Larger, special-shaped structures or corners require different ways of notches and butt joints or lap joints to ensure fiber continuity, and the biggest feature of manual layup is poor stability and consistency. There will be certain differences, which will lead to poor product quality stability. The quality of different batches or even different parts of the same batch will fluctuate greatly, which will also affect the performance and use of the product.

The automotive industry has large batches of products, high quality requirements, and is cost-sensitive. Traditional carbon fiber composite materials cannot meet the needs of enterprises, and the lightweight of automobiles is extremely urgent. A lightweight solution with high production efficiency, low cost, and stable quality is urgently needed to improve this. traditional model

[0003] Chinese patent application CN107745749A discloses a composite material automobile engine cover and a preparation method thereof. The composite material automobile engine cover comprises: an inner panel and an outer panel assembled by adhesive bonding; the materials of the inner panel and the outer panel are both Using carbon fiber and glass fiber mixed weaving, and impregnated with resin to heat and cure composite materials, the device has the advantages of reducing the manufacturing cost of the car hood, and has the advantages of fatigue resistance, corrosion resistance, vibration reduction and insulation, etc., but the invention utilizes The RTM molding process separately prepares the inner panel and outer panel of the carbon-glass hybrid car hood, which has a long manufacturing cycle and high cost.

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