Patent ID: 9662837
Date: 2017-05-30
CPC Classifications: B29C,B29D,B29K,B33Y,Y10T

Claim:
1. A method for printing a three-dimensional structure with a smooth surface comprising the following steps: depositing multiple droplets of printing material at least partially side by side and one above the other, curing the deposited droplets by, light irradiation to build up a three-dimensional pre-structure in a first step; and smoothing at least one surface of the three-dimensional pre-structure by targeted placement of compensation droplets in boundary areas of adjacent deposited droplets and/or near edges of the surface to be smoothed in a second step to build up the three-dimensional structure with a smooth surface; wherein the compensation droplets deposited in the second step have a smaller mean diameter than the droplets deposited in the first step, and wherein the compensation droplets deposited in the second step are cured in the second step by light irradiation.