The 3D pellet printers from AIM3D are based on the patented Voxelfill process. In contrast to FDM 3D printers, 3D pellet printers process more cost-effective granulates instead of filaments. The strength tests carried out by AIM3D now prove that this process can overcome inhomogeneous strengths of 3D components in the X, Y and Z axes and thus comes close to conventional processes such as injection molding.
Voxelfill principle overcomes inhomogeneous strengths
In the additive manufacturing of polymers, components exhibit inhomogeneous strength values due to the layer-based build-up process. This is mainly due to disadvantages in tensile and flexural strength, as well as very brittle behavior along the Z-axis. Using the 3D extrusion technology of the CEM process, AIM3D developed a voxelfill strategy that overcomes these limitations and increases the cost-effectiveness of the CEM process. Voxelfill can also be used for multi-material components and is generally suitable for the construction of 3D components in the plastic, metal and ceramic material groups.
80 % strength achievable
Depending on the material, material extrusion 3D printing currently achieves approx. 50% strength in the printing direction. The printed layers therefore tear apart and the components are often only suitable for prototypes. With Voxelfill, AIM3D now achieves 80% strength, with a potential target of 100%.
Versatile material PEI
The ExAM 255 and ExAM 510 3D pellet printers can process standard pellets with or without fillers to generate resilient 3D components. This includes the flame-retardant polyetherimide PEI. PEI is suitable for high application temperatures, i.e. 180ºC permanently (217ºC up to glass transition). With the PEI material Sabic ULTEM 9085, 3D pellet printing now achieves component properties that come close to the classic injection molding process. PEI thus opens up areas of application in automotive, aerospace, rail vehicles and defense technology.