公开(公告)号：US20240017497A1

公开(公告)日：2024-01-18

申请号：US18256884

申请日：2021-12-10

申请人： Carbon, Inc.

发明人： Ronald Truong ,  Daniel Jiaji Yang

IPC分类号： B29C64/393 ,  B29C64/124 ,  B29C64/232 ,  B29C64/245 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

CPC分类号： B29C64/393 ,  B29C64/124 ,  B29C64/232 ,  B29C64/245 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

摘要： A method of forming a three-dimensional object (31) includes the steps of: (a) providing an apparatus including a carrier (15), a light transmissive window (12) having a build surface, polymerizable liquid (21) on the build surface, and a growing object (31) on the carrier, the growing object produced by light polymerization of the polymerizable liquid; (b) vertically reciprocating the carrier (15) with respect to the build surface in an upstroke and a downstroke, the downstroke being shorter than the upstroke, to form a build region between the growing object and the build surface, and to fill the build region with the polymerizable liquid, while also: (i) sensing force exerted between the carrier and the build surface through the growing object (31) and the polymerizable liquid (21) during the upstroke; and (ii) modifying the speed, acceleration, or both speed and acceleration of the upstroke in response to the sensed force so that the sensed force approaches a predetermined target force; then (c) irradiating the build region with light through the light transmissive window to form a new portion of the object from the polymerizable liquid on the growing object; and then (d) repeating steps (b) through (c) to form additional portions on the growing object until the three-dimensional object is formed.