Method and apparatus for layerwise production of a tangible object

US10836102B2 · kind B2 · utility

Assignee

• Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO · NL

Inventors

• Erwin Rinaldo Meinders · Eindhoven, NL
• Herman Hendrikus Maalderink · Nuenen, NL

Key dates

• Filing date: Aug 31, 2016
• Grant date: Nov 17, 2020
• Expiry date: Jan 17, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/25
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A layerwise production method of a tangible object (8). A layer of uncured building material is provided onto a carrier (4, 30). Repeatedly, method cycles are performed, each comprising: providing layer data corresponding to an object layer, selectively exposing the layer of building material based on the layer data for curing thereof, and providing a next layer of building material onto the preceding layer. Each method cycle further includes verifying the cured preceding layer for identifying regions of insufficiently cured building material, and adapting a radiation dose locally for the next layer dependent on whether or not a location to be exposed in accordance with the layer data of the next layer coincides with one of the identified regions of insufficiently cured building material in the preceding layer.