Abstract
Additive Manufacturing represents a well-known and fast growing material processing technology. Printed part is formed by adding material layer by layer until the part is finished without requiring any additional molds. Therefore, using Additive Manufacturing can save time and costs in comparison to commercial production methods particularly when manufacturing complex prototypes or small batch series. Another advantage of Additive Manufacturing is its freedom of design. This review is focused on material extrusion, a specific Additive Manufacturing technology. It begins with a short overview of the most common materials processed with this technology. Subsequently, we discuss several processes and machine parameters in material extrusion as well as their influence on the printing process and on the final properties of the printed part. Based on this knowledge, various challenges in material extrusion are also identified. These challenges must be resolved in order to improve the material extrusion process.
Highlights
Definition of Additive Manufacturing, Origin and Operation MethodIn the literature, different denotations for “Additive Manufacturing” (AM) can be found
Using Additive Manufacturing can save time and costs in comparison to commercial production methods when manufacturing complex prototypes or small batch series. Another advantage of Additive Manufacturing is its freedom of design
This review is focused on material extrusion, a specific Additive Manufacturing technology
Summary
Different denotations for “Additive Manufacturing” (AM) can be found. High precision in the layering process lessens the deviation of the printed part from the digital/virtual part and, increases the likelihood of producing an accurate final product of high-resolution To achieve this level of precision, good hardware components with high moving precision and well-developed software for accurate data processing are necessary. For the production of parts using AM, different AM methods based on contrasting working principles were developed and improved over time They still require further development and optimization to achieve better accuracy in printing and to improve the mechanical and optical properties of the printed parts. To enhance our scientific understanding on the process of filled polymeric materials in solid wire based printing methods, an EU-funded project has been initiated Within this project, the basics for the development from filament production to the final part will be explored. This review will stick to “material extrusion” as a synonym for the extrusion-based AM technology
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