Carbon fiber is a microcrystalline graphite material ob […]
Carbon fiber is a microcrystalline graphite material obtained by piling up organic fibers such as flake graphite microcrystals along the fiber axial direction, and undergoing carbonization and graphitization treatments. Carbon fiber not only has the advantages of high stiffness, high tensile strength, low weight, high chemical resistance, high temperature resistance and low thermal expansion, but also has the soft processability of textile fibers. It is a new generation of reinforcing fibers. These characteristics make carbon fiber very popular in aerospace, civil engineering, military, medical and automotive applications.
Three common carbon fiber molding processes
Compression molding: Place the carbon fiber prepreg between the upper and lower molds, close the mold and place the mold on the hydraulic forming table. After a certain period of high temperature and high pressure cure the resin, remove the carbon fiber product. This molding technology has the advantages of high efficiency, good part quality, high dimensional accuracy, and less environmental impact. It is suitable for the molding of batches and high-strength composite parts.
Winding: The carbon fiber prepreg is wound on the core mold according to certain rules. After a period of high temperature curing, it is then demolded to form a composite product. Carbon fiber sheathed winding molding can give full play to its high specific strength, high specific modulus and low density. This molding process is usually used to make pipes.
Vacuum autoclave molding: Cover the carbon fiber prepreg layer with vacuum, place it in the autoclave, and use a vacuum pump to vacuum. After a period of vacuum heating, the resin is cured, and the carbon fiber product blank is obtained. The main advantage of this process is that composite materials with high carbon fiber content can be obtained; the resin can better impregnate carbon fibers.
Production and processing of carbon fiber products:
Do a good job of prepreg cutting and layup, carbon fiber molds, etc., and clean up the carbon fiber molds;
2. Mold curing
Place the stacked raw materials in the mold, close the mold, apply a certain pressure, temperature, and set the curing time;
3. Cooling and demoulding
Cool down the mold for a period of time after the hot pressing process, and then open the mold for demolding treatment;
4. Processing and forming
The demolded product needs to be cleaned and polished to make the surface smooth and tidy;
5. Non-destructive testing and final inspection
Test and final inspection of products according to the requirements of design documents.