What types of materials are used for molds used in the molding and production of carbon fiber products?

author: Lily

2025-11-09

When carbon fiber composite materials are manufactured into carbon fiber products, molds are typically used for production. The performance of the mold directly affects the final product. Standard carbon fiber product molds are made of steel for the simple reason that steel has higher strength, ensuring good performance of the produced carbon fiber products. There are also many other types of molds.

1. wooden mold

Wooden molds are molds made of wood. A suitable piece of wood is selected according to the size of the product to be produced. The wood is then cut and processed accordingly, including processing on a metal bed and applying putty to the surface to make it smooth. The product can then be produced using this mold. This method of using molds is very old and is rarely used now. Carbon fiber products rarely use this type of wooden mold.

2. Substitute wood mold

Initially, most molds were made of wood. Later, non-wood molds were used, specifically resin molds. Resin molds have a high degree of surface smoothness and undergo some simple processing. These resin molds are primarily used for molds requiring high dimensional precision.Resin-based molds are not very suitable for the production and processing of carbon fiber products. This is because normal carbon fiber products already contain resin-based materials, which are melted and then solidified at high temperatures to be processed into carbon fiber products. In practical applications, these wood-substitute molds are more often used for small-scale trial production, because resin will be lost, which can easily lead to inaccurate dimensions.

3. Sludge mold.

Clay, similar to bricks, tiles, and Zisha teapots, was initially used in car body designs. Clay can be finely sculpted at room temperature and becomes extremely hard when cured at high temperatures. When used for mold making, foam can be added to the surface to make it highly smooth. Although this clay is hard, it is also quite brittle, so it is easy to break and is not suitable for high-precision product manufacturing or mass production.

4. Metal molds

Metal molds are commonly used for carbon fiber products. The cost of the molds is very high. They are usually made of aluminum alloy or steel. For larger products, steel molds are often used to ensure higher performance of the carbon fiber products and greater flatness. Large carbon fiber products especially require metal molds to ensure overall flatness and higher reusability, enabling mass production.