How can you follow powder ageing in Additive Manufacturing?

October 3, 2018
How can you follow powder ageing in Additive Manufacturing? Introduction In Additive Manufacturing (AM) processes, a three-dimensional object is created one superfine layer at a time. Therefore, the term Additive Manufacturing implies adding material to create the object.By contrast, if an object is created by classical means, it is often necessary to remove material through milling, machining, etc…However, despite AM is more economic than classical machining, in most case, only a...
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Angle of Repose

October 3, 2018
Angle of Repose Principle When a powder is poured onto a surface, a heap is formed. It is well known that both the repose angle and the heap shape strongly depend on grain properties (Moisture content, morphology, and particle size distribution, among other parameters, …). In particular, a cohesive powder forms an irregular heap while a non-cohesive powder forms a regular conical heap. “The angle of repose or the critical angle of repose, of a granular material is the steepest angle...
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Granular materials

April 6, 2018
GRANULAR STATE A granular medium is an assembly of many solid elements, which can interact for example in collisions. But also under the effect of electromagnetic or gravitational forces. Those elements, also known under the generic term grains, are generally arranged in a disordered way and often have differences in shape, size and surface condition. Granular media are found at all scales: fine compacted powders composing aspirin tablets, dunes of the desert, the ballast of the railways...
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Granutools – Additive Manufacturing Process Optimisation Workflow

January 9, 2017
Granutools - Workflow for process optimization  Granutools is proud to introduce the revolutionary workflow for the process optimization of 3D printing. The workflow is essential for parts producers, 3D printer manufacturers and powder companies.The workflow consists of the unique combination of the following three instruments for AM processs optimization.  Workflow = GranuDrum + GranuPack + GranuChargeWhich Flowmeter for powder-bed-based additive manufacturing? In SLS...
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Which Flowmeter for Powder-Bed-Based Additive Manufacturing?

January 9, 2017
Powder Additive Manufacturing Selective Laser Sintering In SLS (selective laser sintering), SLM (selective laser melting) and EBM (electron beam melting) techniques, successive thin layers of powder are created with a ruler or with a rotating cylinder. Each layer is partially sintered or melted with an energy beam (laser or electron beam). The layer thickness defines the vertical resolution.Therefore, a thin layer leads to a better resolution.In order to obtain a thin layer, the...
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GranuTools instruments range for powder flowability measurement: The basic principles

December 23, 2016
Selected geometries Different flow geometries are available to evaluate the rheological properties of a powder or a granular material. A consortium of French research groups called GDR Midi has studied these geometries carefully. In their publication dedicated to dense granular flows [1], the different geometries are analyzed: plane shear, annular shear, vertical-chute flows, inclined plane, heap flow, and rotating drum.Among these powder flow instruments, GranuTools has selected three...
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