Rapid Prototyping High Pressure RTM Process for Carbon Fiber Auto Parts

2022-08-18 18:22:10

With the development of the automobile industry, people have higher and higher requirements for the quality of automobiles. In order to adapt to the development of the times and the needs of consumers, automobile manufacturers around the world are constantly innovating, not only to improve the efficacy and quality of auto parts, but also to carry out various tooling and production lines for the production of auto parts. Improvements to increase productivity and reduce cost savings.

Carbon fiber parts made by carbon fiber RTM process have the advantages of high strength, low density, high dimensional stability, stable product quality, and high surface quality, and have been widely used in aerospace and military fields. The application of carbon fiber RTM parts in the car body can greatly reduce the weight of the car body, which is of great significance to improve fuel efficiency and reduce vehicle exhaust emissions.

In the traditional RTM process of automotive carbon fiber auto parts, due to the low degree of automation and the long molding cycle, the molding time of general components is about 30 minutes, and the molding time of large products is even more than 2 hours. This molding cycle can meet the needs of aerospace and other industries with a low degree of mass production, but it is difficult to meet the needs of large-scale and mass production in the automotive industry.

For the rapid prototyping high-pressure RTM process of carbon fiber auto parts, it is necessary to cooperate with a mold temperature control machine with a high degree of automation. The chiller is mainly used to cool the hydraulic oil in the hydraulic system of the mold base and the high-pressure casting machine, and controls the temperature of the mold together with the mold temperature machine to ensure that the performance of the product does not change with the change of environmental conditions.

The specific process of the carbon fiber RTM process is as follows: first, the reinforcing material preform is put into the mold cavity, and the low-viscosity resin system is injected into the cavity with injection equipment. Since the periphery of the mold is sealed, and the mold is designed with injection and discharge. Therefore, the resin in the cavity flows smoothly and the gas in the cavity is exhausted to thoroughly infiltrate the fibers, and then the heating system of the mold, that is, the mold temperature machine, heats the resin to heat and solidify the resin.

In the RTM process, the use of the carbon fiber RTM molding mold temperature machine can accurately control the mold temperature, improve the resin curing rate, give full play to the role of the reinforcing material, and improve the bearing capacity of the carbon fiber composite material. It has little pollution, can be integrally formed at one time, and is suitable for mass production of auto parts.

During the use of the carbon fiber RTM molding mold temperature machine, the choice of molding temperature is affected by the heating method that the mold itself can provide, the resin curing characteristics and the curing system used. Higher molding temperature can reduce the viscosity of the resin, promote the flow and impregnation of the resin inside the fiber bundle, and enhance the interface bonding ability between the resin and the fiber.