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Method for preparing composite material in use for car body case

A composite material and casing technology, which is applied in the field of composite material preparation for automobile casings, can solve the problems of high surface flatness requirements for mold precision molding, difficulty in controlling the fluidity of plastic materials, etc., to shorten the processing cycle and resist fatigue Good performance and large specific modulus

Inactive Publication Date: 2005-01-12
杨林江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing composite materials for automobile shells are mainly large resin injection moldings containing glass reinforced fibers. Although the rigidity and hardness of the car body can be guaranteed, they still face high requirements for mold precision and molding surface flatness, and it is difficult to control plastic materials. A series of technical problems such as fluidity and plate adhesion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Surface treatment of carbon fiber: Use acetic acid to adjust the pH value of 15% sodium hypochlorite solution to 5.5, soak 12g of carbon fiber braid in the above aqueous solution with a water temperature of 45°C for 16h, and dry it in an oven at 130°C for 5h Cut into 10 strips of the same shape for later use.

[0017] 2. Preparation of resin system: take 100g of E-51 epoxy resin, add 30g of acetone, 2g of liquid carboxyl-terminated nitrile rubber, stir rapidly with an iron rod to make the resin glue thinner, add 593 modified amine curing agent 8 About gram, stir rapidly about 3 minutes, dubbed resin glue.

[0018] 3. Preparation of fiber braided prepreg: apply the prepared resin glue on both sides of each carbon fiber cloth with a scraper and brush to make it fully infiltrated to obtain a prepreg. After the volatile matter is partially volatilized, the carbon fiber The braid is ready for use in a semi-cured state.

[0019] 4. Preparation of composite materials: App...

Embodiment 2

[0021] Treat 120g carbon fiber braids with the same method in Example 1 for subsequent use, get 80gE-51 epoxy resin, add acetone 80g, liquid state carboxylated nitrile butadiene rubber 4g, stir rapidly with iron bar, resin glue is thinned, and then Add 4 g of phthalic anhydride, 3 g of N, N-dimethylaniline, stir rapidly for 2 minutes, apply the glue solution on each fiber cloth with a brush and scrape it evenly with a scraper, the remaining operating methods are the same as in Example 1, and heat The molding process parameters in the pressure vessel are adjusted as follows: mold temperature: 100°C, pressure 0.4Mpa, heat preservation and pressure holding time: 4h.

[0022] performance

Example 1

Example 2

Tensile strength, MPa

1250

1250

Tensile modulus, Gpa

136

136

Bending strength, Mpa

1680

1680

Flexural modulus, GPa

128

128

layer

between

Cut

cut

powerful ...

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PUM

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Abstract

A composite material used for the shell of car is prepared through proportionally mixing resin with diluent, solidifying and toughening agent, coating the mixing on the fibrous fabric, semi-solidifying, laminating them on a die, accelerating its solidification in a heating and pressurizing container, cooling and removing die.

Description

technical field [0001] The invention relates to a method for preparing composite materials for automobile shells, belonging to the technical field of manufacturing composite materials for automobile shells. Background technique [0002] Nowadays, people pay more and more attention to environmental protection. The research and development of various energy-saving new technologies, such as electric hybrid fuel vehicles and fuel cell vehicles, are favored by major automobile manufacturers. However, on the other hand, using various lightweight materials such as high-strength steel, magnesium, titanium, engineering ceramics, and resin-based composite materials to reduce the weight of automobiles can also achieve energy-saving goals. However, due to various conditions, at present, the application of light metal materials in automobiles is limited to some parts. [0003] Different from the application of light metal materials, in addition to the use of resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/06
Inventor 杨林江
Owner 杨林江
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