1, making dies, convex and concave dies.

2. Cut the carbon fiber prepreg into a shape larger than a circular ring, and the allowance coefficient is 5%.

3. Brush the mold release agent, put the cut carbon fiber prepreg ring into the female mold, flatten it and put it into the male mold.

4. Put in a hot press, heat and pressurize for 30 minutes and then cure.

This is a standard process and easy to operate. It can be cured by heating without a mold.