Printing of energetic materials
AssigneeNederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
InventorsMichiel Hannes Straathof, Kjeld Jacobus Cornelis Van Bommel, Christoffel Adrianus Van Driel
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Abstract
The invention is directed to a method for the preparation of an energetic material product such as a propellant or explosive charge or grain. The method includes additive manufacturing with co-extrusion of at least two materials to form a multi-layered filament and layer-by-layer deposition of the multi-layered filament. The multi-layered filament has a first material layer and a second material layer and at least one layer includes an energetic material. In another aspect, the invention is directed to an apparatus for use in this method, the apparatus comprising a co-extrusion nozzle.
Claims9
A method for the preparation of an energetic material product wherein said method comprises additive manufacturing comprising co-extrusion of at least two material feeds to form a multi-layered filament and layer-by-layer deposition of said multi-layered filament,
- wherein said multi-layered filament comprises a first material layer comprising a first energetic material and a second material layer comprising a second energetic material,
- wherein said first energetic material has a different burn rate or detonation velocity than the second energetic material, and
- wherein during said co-extrusion for forming the multi-layered filament, the volume ratio of the first material layer to the second material layer is varied by independently controlling the extrusion rates of each material feed, such that a continuous gradient is obtained in a longitudinal direction of the multi-layered filament, wherein the continuous gradient may be from 100 wt. % of first material to 100 wt. % of second material.
Dependencies are inferred from the claim text.