3D printing with high viscous fluids
While the additive manufacturing of metals and thermoplastics has already found its way into industrial production, the 3D printing of fluids and pastes is still at the beginning of a professional use. ViscoTec‘s Fluid Dosing & Deposition method (FDD) allows the industry a fast and accurate 3D printing. The direct material application process is similar to filament printing. The FDD printheads work according to the volumetric endless piston principle. Here, the delivered quantity is proportional to the motor speed. The conveying direction is reversible by changing the direction of rotation, the pump characteristic is pressure-stable and absolutely linear. This circumstance allows a clear statement about the ratio of rotation, time and flow rate. By using the FDD printheads even solids-laden fluids can be dosed with less shear rates. The FDD method can be used with 1-component and 2-component fluids. The range of the 3D-printed fluids goes from silicones and polyurethanes to epoxiy resin, abrasive ceramics or metal-filled photopolymers. The viscosities of the fluids can reach up to 2 million mPas. Due to a material crosslinking at the molecular level, the mechanical strengths in the Z direction can be significantly higher than in filament-3d printing.