Systems and methods for resin recovery in additive manufacturing
US11731345B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2022 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Jan 6, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y50/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of producing multiple batches of objects by stereolithography, includes the steps of: (a) dispensing an initial or subsequent batch of dual cure resin into a stereolithography apparatus, the resin including a light polymerizable component and a heat polymerizable component; (b) producing an intermediate object by light polymerization of the resin in the apparatus, wherein the intermediate object retains excess resin on a surface thereof; then (c) separating excess resin from the intermediate object; (d) blending the excess resin with additional dual cure resin to produce a subsequent batch of dual cure resin; (e) repeating steps (a) through (c), and optionally repeating step (d), to produce additional object(s); and (f) baking the objects, together or separately, to produce multiple batches of objects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.