Carbon Fiber Molding Processes: What Are the Different Types?

Forecasts show that the global carbon fiber market will reach $8.9 billion by 2031.

Carbon fiber has one of the best strength-to-weight ratios of any material, making it ideal for a range of applications. There are a variety of molding processes available, all of which provide different results. Choosing the molding process that is best for you will depend on your needs.

For a brief description of the different carbon fiber manufacturing processes, read on.

spray molding
During this manufacturing process, fibers are chopped and mixed with resin in an airbrush. It is then sprayed onto the mold, pressed with rubber rollers and cured. This is great for making transition layers for various parts, but not for mass production.

filament winding
This involves winding fibers or tape onto a mandrel. The resin glue is added, and the part is cured. This method is commonly used to form cylindrical, spherical or curved parts.

liquid forming
Liquid forming is one of the fastest carbon fiber forming technologies. It synthesizes liquid molecules into polymers and transforms them into composite materials through polymer curing reactions. It is energy-efficient, cost-effective, and shortens production cycles.

This approach is still advancing and is not yet widely used.

compression molding
For this method, the fibers are placed between two molds. The hydroforming table works with high pressure and heat to form and cure the part. This is one of the most efficient types of carbon fiber molding. It's also accurate, cost-effective, and produces high-quality parts.

injection molding
Using relatively new technology, the process is streamlined with a one-step process, making it very efficient. It is also one of the best techniques for making auto parts. The end product of this process is lightweight and strong, and is often cheap to execute.

hand paste
For this process, the operator places the fibers on the mold and then uses a brush or spray to apply the resin. While still widely used, this method often provides loose, low-strength parts. It is also very inefficient compared to other methods.

vacuum autoclave
The carbon fiber is placed on the mold, and vacuum induction creates negative pressure, which forces the resin into the fiber. Parts have high strength and low weight. The quality isn't the best, but it's still fine for most applications.

3iTech induction heating
This is one of the newest carbon fiber manufacturing methods available. The mold has an integrated inductor to generate heat. Carbon fiber molds heat up quickly, reducing cycle times while remaining cost-effective.

This method is currently only available for smaller parts, but is still progressing.

Choose the right molding process
With all the different molding process options mentioned above, and several others, it can be difficult to know which is right for a given application. SMI Composites is a leading manufacturer of composite materials. With our expertise in the industry, we can help determine which method is best for your needs.

So, to know more, click here to contact us now.