Direct Robotic Extrusion of Photopolymers (DREPP): Influence of microgravity on an in-space manufacturing method

A method using Direct Robotic Extrusion of Photopolymers (DREPP) to manufacture structures in space a cost- and power-efficient way is presented this article. The DREPP technology has the potential outperform conventional deployable structures, which generally suffer from severe limitations: long high-cost development phases, dimensioning driven by launch loads instead operational loads, mechanical complexity as well constraints maximum structure size due volume limitations on spacecraft. In-Space Manufacturing (ISM) especially AM offer solution circumvent these limitations. Fundamental investigations have already been carried out International Space Station (ISS). Numerous test prints shown that Fused Filament Fabrication (FFF) provide satisfactory results under microgravity controlled environmental conditions. With investigated manufacturing process, photoreactive resin robotically extruded through nozzle directly cured UV-light. Unlike most Additive (AM) methods, layer-by-layer, able create three-dimensional structural elements one continuous movement. To investigate feasibility conditions, multiple experiments were performed parabolic flights, where it was different geometries can be successfully manufactured When examining printing process at zero-gravity 1 g differences behaviour observed, are detail. In addition, evaluation shows large curing zone – transition area between liquid state easier handle than This contributes an increased overall stability enables new ways for controlling process. article provides details ground, zero altered gravity testing, quality gives outlook future approach preparations vacuum sounding rocket.