Process for quality control for a powder based layer building up process
First Claim
1. Process for producing three dimensional bodies including the multiple succession of the steps a) applying a layer of particles, via a dispensing device, upon a substrate b) flattening the applied layer with a flattening device c) hardening the layer by adhesion of the particles with introduction of binder liquid or hardening the layer by melting or sintering the particles under the influence of intensive radiation in defined areas within the layer, thereby characterized, that after steps a), b) and/or c) an optical image of the applied, flattened and/or hardened layer is recorded, wherein the image is suited for revealing particle defect sites located in the layer plane or particle layer defects.
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Accused Products
Abstract
Process for production of three dimensional bodies of particles by a layer buildup process (powder based generative rapid prototyping process), wherein the layer buildup is monitored by an optical control device, which evaluates the light intensity or color differences within and between deposited or hardened particle layers, as well as a suitable optical control device, and further yet, particles or binder liquid particularly suited for optical quality control.
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Citations
21 Claims
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1. Process for producing three dimensional bodies including the multiple succession of the steps
a) applying a layer of particles, via a dispensing device, upon a substrate b) flattening the applied layer with a flattening device c) hardening the layer by adhesion of the particles with introduction of binder liquid or hardening the layer by melting or sintering the particles under the influence of intensive radiation in defined areas within the layer, thereby characterized, that after steps a), b) and/or c) an optical image of the applied, flattened and/or hardened layer is recorded, wherein the image is suited for revealing particle defect sites located in the layer plane or particle layer defects.
- 11. Coated particles for producing three dimensional bodies with a generative rapid prototyping process with utilization of binder liquids, which cause hardening of particle layers in defined areas, thereby characterized, that the coating of the particles contains a dyestuff soluble in the binder liquid.
- 13. Binder liquid for producing three dimensional bodies by means of a generative rapid prototyping process with use of particle layers which are hardenable in defined areas by a binder liquid, thereby characterized, that the binder liquid contains dyestuffs.
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15. Coated particles for producing three dimensional bodies by means of a generative rapid prototyping process which utilization of laser radiation, which causes melting or sintering of particle layers in defined areas, thereby characterized, that the coating is decomposed by the laser radiation at least partially with darkening.
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16. Device for producing three dimensional bodies with at least one generative rapid prototyping process, including
a particle reservoir a flattening device a hardening device and a control device, thereby characterized, that the control device includes at least one camera, with which an optical image of the entire surface of the 3D-body to be generated is reproducible.
Specification