Machinability of PLA obtained by injection molding under a dry milling process

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Machinability of PLA obtained by injection molding under a dry milling process

CLOËZ Liam, FONTAINE Michaël, GILBIN Alexandre, BARRIÈRE Thierry

Abstract. This paper is part of a study focusing on the elaboration of accurate component with complex geometries using bio-sourced as an alternative to petrochemical polymer. The bio-sourced and biodegradable in this study is composed of a Poly Lactic Acid (PLA) matrix and hemp fibers. The final component is obtained by injection followed by a machining operation. the final component is obtained by injection followed by a machining finishing operation. Injection molding will be carried out to be compared with 3D printing on economic, environmental, production and workpiece quality criteria. This paper focuses only on the combination of two processes, injection molding followed by machining on poly (L-lactic acid) or PLLA which is biobased and biodegradable. After injecting the workpiece, thermo-physical characterization tests are realized on PLLA polymer. Rheology, thermal and mechanical tests are carried out in order to study thermomechanical behavior and to understand material flow phenomena at different temperatures and shear rates. The objective of this paper is to overcome the technical challenges of milling this material without any lubricant. In an upcoming project, various machining operations will be carried out such as turning to study continuous cutting, or milling to study discontinuous cutting on workpieces reinforced with bio-sourced fibers as hemp.

Keywords
Poly Lactic Acid, Injection Molding, Machining, Dry Milling

Published online 4/24/2024, 10 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: CLOËZ Liam, FONTAINE Michaël, GILBIN Alexandre, BARRIÈRE Thierry, Machinability of PLA obtained by injection molding under a dry milling process, Materials Research Proceedings, Vol. 41, pp 1877-1886, 2024

DOI: https://doi.org/10.21741/9781644903131-208

The article was published as article 208 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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