Stereolithographic additive manufacturing of acoustic devices with spatially modulated cavities

Abstract

Stereolithographic additive manufacturing (STL‐AM) has been developed to create practical components with functional geometries. Nanoparticles are mechanically dispersed into photosensitive resins, and the resulting mixed paste is thinly spread on a flat substrate. One‐dimensional (1D) raster lines were cured via ultraviolet laser scanning. Two‐dimensional (2D) cross‐sections are formed by adjacent joining. Three‐dimensional (3D) solid structures are fabricated via lamination bonding. The composite precursors were dewaxed and sintered under optimized heat treatment conditions. Computer‐aided design, manufacture, and evaluation (CAD/CAM/CAE) processes of acoustic devices with rigid alumina structures will be progressively reviewed. Cylindrical cavities were divided into self‐similar volumes as harmonic instruments to perform overtone sounds. Spherical cavities were connected with steric junctions as noise suppressors to exhibit absorption bands. Qualitative improvements in social and industrial environments by using stereolithographic technologies are discussed and practically demonstrated.

Systematic Compounding of Ceramic Pastes in Stereolithographic Additive Manufacturing

“…Dimensional reductions were measured at 20% linear shrinkage. Accordingly, reproducible reductions could be precisely offset via a numerical feedback of the shrinkage ratios for redesigns [10].…”