What Is 3D Laser Cutting Used For? A 3D laser cutting machine mounts a fiber laser cutting head on a 6-axis industrial robot, allowing the laser to cut and trim complex 3D plastic and composite parts directly from molded surfaces. Unlike flatbed laser cutters that process flat sheet, a 3D system reaches around curves, contours, and deep draws to trim injection-molded automotive interior parts, remove flash, and cut mounting holes after the molding operation. This is the