This publication relates to toolpath generation and a method for material deposition. We suggest the creation of loops in FFF produced products together with cross-connections through those loops, in order to increase the adhesion strength in between layers either of the same material or of different and potentially incompatible materials. By chaining of such loops and their cross-connections an interlocking microstructure arises which increases the Z-strength of the FFF manufactured (multi-material) product.
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Kuipers, Tim, "Loops and Threads in FFF manufactured products", Technical Disclosure Commons, (September 17, 2021)