Direct Metal Laser Melting through Projection of Amplified Images
Vardex uses its image amplification method to melt metal powders over areas ranging from 20 ~ 100 mm2 through projection of images. The amplified images are generated by combination of pulsed 1064 nm NdYAG laser, Texas Instrument Digital Micromirror Device(s) and 1064 nm NdYAG amplifier(s).
Vardex is currently working towards achieving following milestones. • Printing in blocks of 1cm2 • Pulse energy levels up to 30X higher compared to existing prototype. • Using Multi-stage Amplification approach to achieve higher energy levels. • Multi-stage Amplification achievable using off the shelf amplifiers. • Absorption depths of 50 microns (currently 25 μm) • Build rates of 270 cm3/hr (Assuming print rate of 15 images/second)
Image Generated by a Variable Mask.
Amplification of Image Generated by Mask.
Amplified Image used to melt metal powder; 1.5ms Image Projection Time; Area processed 4.5mm x 4.5mm.