Carbon fiber filaments is the stronger, sturdier, and more dimensionally stable versions of their base material. It is an exciting filament to work with as it is perfect for making parts for prototypes and other applications.
When it comes to 3D printing, the material occupying the largest market share are photopolymers as compared to composite materials such as carbon fiber filled 3D printing materials.
To be able to compete with traditional materials, these composite materials are necessary for 3D printing to be a viable technology and replace more conventional processes. As for composites, carbon fiber materials are a leading contender in the industry.
As of the moment, the methods for introducing carbon fiber in the 3D printing processes is still limited. On this page, we will be discussing this 3D printing filament.
How Carbon Fiber is Used in 3D Printing
At present, the easiest technique for using carbon fiber in 3D printing is through CFRP filament. With this material, carbon fiber and thermoplastic are combined, creating a composite filament. Extrusion is possible through FFF technologies or fused filament fabrication.
Carbon fiber filaments make use of small fibers infused into another 3D printing material. Doing so improves the properties of this filament. There are popular 3D printing filaments that have carbon fiber fill that you can purchase. Some of these filaments include Polycarbonate, ABS, Nylon, PETG, and PLA.
What is Carbon Fiber Filament?
Carbon fiber makes the 3D printing material stronger and sturdier. The prints produced using this material are also lighter and are more stable in terms of its dimensions. The fibers aid in preventing any parts from shrinking as the print cools down.
The print settings for carbon fiber filaments such as extrusion rates, bed adhesion, speed, and printing temperature are similar to the base material’s normal settings. An example here is if you are using carbon fiber filaments that are PLA-based, you can try using the print settings for PLA.
Tips for 3D Printing Carbon Fiber Filaments
Here are some tips that can help you in reducing the risk of encountering common issues when it comes to 3D printing using carbon fiber filaments. Some of these issues can be your nozzle starting to wear down or clogging in your extruder.
Use a Nozzle Made of Hardened Steel
To address this issue, upgrade to a nozzle made of hardened steel. With this type of nozzle, you can be sure that it can endure the wear brought about by carbon fibers. A disadvantage of this nozzle though is that it is less conductive thermally compared to the brass nozzles.
It may be necessary to set the temperature for the extruder at 40°C higher than the usual setting. This will also aid in reducing the chances of the filament clogging it. You may also reduce your fan speed so that you can avoid any thermal issues with the hardened steel nozzle.
Adjusting the Retraction Settings to Prevent Clogs
Carbon fiber filaments contain little fibers that will not melt. Compared to the base material used for the filament, the chances of carbon fiber filaments clogging the nozzle is much higher. You can reduce your retraction distance to address this.
Apart from that, you can also disable the retractions altogether. This is because it can increase the possibility of fiber buildup inside your extruder assembly. Reducing or disabling the retraction settings can help you deal with the issue of clogging.
Reducing Print Speeds for a More Consistent Print
Try to reduce the print speed by around 25% to 50% and observe with setting works best for your 3D printing material. There may be several trials before you get the right setting but when you do, you will have better and more consistent prints.
Using a Guided Filament Path
Ensure that the path of your filament from spool to nozzle will have gentle curves. There shouldn’t be any sharp turns or spaces where the carbon fiber filament can be dragged on the surface. You can use a PTFE guiding tube. Also, you make sure that the spool is in an area that will lessen any chances of breakage.
You can use nozzles that have larger diameters such as 0.5mm or bigger. These will less likely have issues with clogging. The carbon fiber filaments will be able to easily fit through this larger nozzle.
Pros & Cons of Carbon Fiber Filaments
3 Best Carbon Fiber Filament Brands
There are a number of companies producing carbon fiber filaments. The carbon fiber reinforcement may vary. Here are three of the best brands that make carbon fiber filaments for 3D printing.
1. ColorFabb Carbon Fiber Filament
The prints have a high melt strength as well as excellent stability and dimensional accuracy. The XT-CF20 is a great choice for prints that need to be sturdy. It is perfect for drone parts as well as for aerospace and automotive prototypes.
2. Ziro Carbon Fiber Filament
Ziro has the reputation of providing 3D printing filaments that are of great quality. Their filaments are environmentally-friendly. The standard of their products is guaranteed to be accurate.
It is best to use a 4mm nozzle or larger for this filament. Also, use low print speed when printing with the Ziro carbon fiber filaments. As for print temperature, the recommended range is from 210°C to 230°C.
3. Proto-pasta Carbon Fiber PLA Filament
Proto-pasta is an American company that manufactures high-quality 3D printing filaments. They take pride in the fact that the design and manufacturing, as well as the packaging and labor of their products, are all done in the USA.
|Print Temperature||240°C – 260°C||210°C – 230°C||190°C – 230°C|
Carbon fiber filaments are an exciting 3D printing material to work with. The prints produced will be stable, sturdy, stiff, and lightweight compared with their equivalent if the base materials were used solely.
Although carbon fiber filaments may be a challenge to use for 3D printing because it has the tendency to clog the nozzle, once you have addressed that issue by upgrading to a steel nozzle, you will surely enjoy printing with this material.
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