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Polymer Powder Deposition using Vibrating Capillary Nozzles for Additive Manufacturing

  • Abstract — In this report, the dry delivery of polyamide 12 (PA 12) powder for the preparation of powder layers in laser beam melting (LBM) is investigated. Therefore, an experimental setup was built which consists of a glass nozzle assembled on a piezo-electric actuator. By applying a sinusoidal voltage signal to the actuator, the nozzle is set into vibration mode which enhances the powder delivery through the nozzle. By using this effect, powder mass flow is controlled and a valve-like start and stop function is realized. In order to identify suitable process parameters, a broad range of vibration modes were investigated using two nozzles made from glass with different orifice diameters. Therefore, the vibration frequency and the voltage signal of the actuator were varied and the resulting mass flow was detected by a balance. It was found that both the frequency and the voltage signal affect the mass flow and its stability but with different impact. Moreover, powder lines were deposited with different velocities in order to characterize the setup regarding applicability for highly selective powder deposition for LBM.

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Metadaten
Author:Thomas Stichel, Philipp AmendGND, Tobias LaumerORCiDGND, Stephan Roth
Parent Title (German):Information, Communication and Automation Technologies (ICAT), 2014, Wien
Document Type:Article
Language:English
Year of first Publication:2014
Release Date:2022/11/24
Tag:additive manufacturing; dry powder delivery; multi-material deposition; polyamide 12; vibrating nozzle
Institutes:Fakultät Maschinenbau
Fakultät Maschinenbau / Labor Additive and Intelligent Manufacturing for Sustainability (AIMS)
Publication:Externe Publikationen
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG
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