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Active strand cooling in Large Scale Additive Manufacturing of PC/ABS blends improves processing time for thin-walled geometries by a factor of 3 while preventing heat accumulations and maintaining consistent interlayer bonding strength. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

August 6, 2025Production Engineering2 citationsOpen Access

Influence of active strand cooling on the interlayer bonding strength in Large Scale Additive Manufacturing

TWToni WilleErnst Abbe University of Applied Sciences Jena FNFriedrich NeitmannErnst Abbe University of Applied Sciences Jena AHAndreas HopfErnst Abbe University of Applied Sciences Jena

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Abstract

Abstract In the following work, the influence of active strand cooling on the process efficiency, strand geometry and resulting bonding strength in the Large Scale Additive Manufacturing (LSAM) process is investigated experimentally. Based on layer adhesion and strand homogeneity, a process window for the application of active strand cooling for the processing of polycarbonate (PC) / acrylonitrile butadiene styrene (ABS) blends is derived. Different intensities of compressed air cooling in combination with different cooling times are investigated, to draw conclusions on the occurring bonding strength from the resulting temperature-time history. The purpose is to avoid heat accumulations and resulting deformations, especially for small geometries with low layer times, while achieving consistent bonding strength. During the tests, the processing time for a thin-walled cuboid was improved by a factor of 3.

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