Targeted vibration excitation for increasing the powder deposition efficiency in electrophotographic powder application for Laser-based Powder Bed Fusion of polymers

Kopp, Sebastian-Paul; Medvedev, Vadim; Roth, Stephan

doi:10.1016/j.procir.2022.08.117

Cited by 3 publications

(1 citation statement)

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“…In [32], changing the operation mode from CAD to DAD after every second powder deposition was demonstrated to have a good trade-off between duration for the reversion of polarity and still maintaining significant part height growth. A further aspect of increasing the powder deposition efficiency is the development and implementation of a piezoelectric excitation device in [35]. By decreasing the van der Waals interaction forces due to a rapid increase in the separation distance between powder particles using a piezoelectric excitation, the powder deposition efficiency could be significantly enhanced.…”

Section: Introduction Technology 2: Material-efficient Am Of Multi-ma...mentioning

confidence: 99%

Innovative Process Strategies in Powder-Based Multi-Material Additive Manufacturing

Setter

Hafenecker

Rothfelder

et al. 2023

JMMP

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Multi-material additive manufacturing (AM) attempts to utilize the full benefits of complex part production with a comprehensive and complementary material spectrum. In this context, this research article presents new processing strategies in the field of polymer- and metal-based multi-material AM. The investigation highlights the current progress in powder-based multi-material AM based on three successfully utilized technological approaches: additive and formative manufacturing of hybrid metal parts with locally adapted and tailored properties, material-efficient AM of multi-material polymer parts through electrophotography, and the implementation of UV-curable thermosets within the laser-based powder bed fusion of plastics. Owing to the complex requirements for the mechanical testing of multi-material parts with an emphasis on the transition area, this research targets an experimental shear testing set-up as a universal method for both metal- and polymer-based processes. The method was selected based on the common need of all technologies for the sufficient characterization of the bonding behavior between the individual materials.

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Section: Introduction Technology 2: Material-efficient Am Of Multi-ma...mentioning

confidence: 99%