Lay "dry" carbon fiber composite material on the mold, then lay a vacuum bag, and draw out the vacuum in the system to form a negative pressure in the mold cavity, and use the pressure generated by the vacuum to pass the unsaturated resin through the pre-laid pipeline Press into the fiber layer, let the resin infiltrate the reinforcing material, and finally fill the entire mold. After the product is cured, remove the vacuum bag material and obtain the desired product from the mold.
In the vacuum environment, the resin infiltrates the carbon fiber, and there are very few bubbles in the product. The product has higher strength, lighter weight, stable product quality, and reduces the loss of resin. Only one mold can be used to obtain two sides. A smooth and flat product can better control the thickness of the product. It is generally used in rudders and radar shields in the marine industry, blades and cabin covers in wind power energy, and various types of roofs, windshields, and carriages in the automotive industry.

The composite material blank formed by laying up the single-layer prepreg in a predetermined direction is placed in an autoclave, and the curing process is completed under a certain temperature and pressure. An autoclave is a special pressure vessel that can withstand and regulate a certain temperature and pressure range. The blank is laid on the surface of the mold with release agent, then covered with porous release cloth (film), absorbent felt, and air felt in sequence, sealed in a vacuum bag, and then placed in an autoclave. Before heating and curing, vacuum the bag to remove air and volatiles, and then heat up, pressurize and cure according to the curing system of different resins. The formulation and implementation of the curing system is the key to ensuring the quality of autoclaved parts.

The process of winding continuous fibers or cloth tapes impregnated with resin glue onto the core mold according to a certain rule, and then curing and demoulding into composite products. Carbon fiber winding molding can give full play to its characteristics of high specific strength, high specific modulus and low density. For example, common carbon fiber round tubes are mostly made by winding process.

Place the layer-by-layer prepreg between the upper and lower flat molds for pressure heating and curing. This process can directly inherit the production methods and equipment of wood plywood, and improve and match the rheological properties of the resin. Complete. The lamination molding process is mainly used to produce composite sheets of various specifications and uses. It has the characteristics of high degree of mechanization and automation, and stable product quality, but the one-time investment in equipment is large.

Resin Transfer Molding (RTM: Resin Transfer Molding) technology is a low-cost manufacturing method of composite materials, originally mainly used for aircraft secondary load-bearing structural parts, such as doors and inspection hatches. In 1996, the US Defense Advance Research Agency carried out research on low-cost RTM manufacturing technology of high-strength main bearing components. RTM technology has the advantages of high efficiency, low cost, good quality of parts, high dimensional accuracy, and little impact on the environment. It can be applied to the molding of composite parts with large volume, complex structure and high strength. One of the most active research directions in the field of material processing.

The continuous carbon fiber tow, belt or cloth impregnated with resin glue will be formed and cured by extrusion die under the action of traction force to continuously produce profiles of unlimited length. Pultrusion is a special process in the composite material forming process. Its advantages are that the production process can be fully automated and controlled, and the production efficiency is high.