Fast Desktop-Scale Extrusion Additive Manufacturing

Go, Jamison; Hart, A. John

doi:10.1016/j.addma.2017.10.016

Cited by 50 publications

(33 citation statements)

References 12 publications

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“…[125] With the optimized structure design of heat nozzle, under optimal conditions, the printing speed of FDM can be as high as 500 mm s −1 . [126] Besides the basic thermoplasticity, to avoid buckling of the feeding filament, the print material must be mechanically and rheologically balanced, which limits the variety of printable materials. Several types of thermoplastic soft polymers can be printed with this method, including polylactic acid (PLA), PCL, and other thermoplastic elastomers.…”

Section: Materials Extrusionmentioning

confidence: 99%

A Review of 3D Printing Technologies for Soft Polymer Materials

Zhou

2020

Adv Funct Materials

456

311

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Soft polymer materials, which are similar to human tissues, have played critical roles in modern interdisciplinary research. Compared with conventional methods, 3D printing allows rapid prototyping and mass customization and is ideal for processing soft polymer materials. However, 3D printing of soft polymer materials is still in the early stages of development and is facing many challenges including limited printable materials, low printing resolution and speed, and poor functionalities. The present review aims to summarize the ideas to address these challenges. It focuses on three points: 1) how to develop printable materials and make unprintable materials printable, 2) how to choose suitable methods and improve printing resolution, and 3) how to directly construct functional structures/systems with 3D printing. After a brief introduction on this topic, the mainstream 3D printing technologies for printing soft polymer materials are reviewed, with an emphasis on improving printing resolution and speed, choosing suitable printing techniques, developing printable materials, and printing multiple materials. Moreover, the state-of-the-art advancements in multimaterial 3D printing of soft polymer materials are summarized. Furthermore, the revolutions brought about by 3D printing of soft polymer materials for applications similar to biology are highlighted. Finally, viewpoints and future perspectives for this emerging field are discussed.

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Section: Materials Extrusionmentioning

confidence: 99%

A Review of 3D Printing Technologies for Soft Polymer Materials

Zhou

2020

Adv Funct Materials

456

311

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“…There are, however, several possibilities of increasing speed, by making use of either large, high-output extruders 38,39 or state-of-the-art extrusion techniques. 40 Using formwork prefabrication and set-on-demand concrete casting, it is already feasible to produce full-scale elements. However, there are limits on the geometrical potential of this consecutive fabrication method, as complex geometries may not allow the concrete to flow and self-compact well in the formwork.…”

Section: Conclusion and Next Stepsmentioning

confidence: 99%

Eggshell: Ultra-Thin Three-Dimensional Printed Formwork for Concrete Structures

Burger

Lloret-Fritschi

Scotto

et al. 2020

3D Printing and Additive Manufacturing

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Concrete is a material favored by architects and builders alike due to its high structural strength and its ability to take almost any form. However, to shape concrete structures, heavy-duty formwork is usually necessary to support the fresh concrete while curing. To expand geometrical freedom, three-dimensional (3D) printed concrete formwork has emerged as a field of research. This article presents one possible application, a novel fabrication process that combines large-scale robotic fused deposition modeling 3D printing with simultaneous casting of a fast-hardening, set-on-demand concrete. This fabrication process, known as ''Eggshell,'' enables the production of nonstandard concrete structures in a material-efficient process. By casting a fast-hardening concrete in a continuous process, lateral pressure exerted by the fresh concrete is kept to a minimum. In this way, a 1.5-mm-thin thermoplastic shell can be used as a formwork, without any additional support. Geometries of different scales are tested in this article to evaluate the feasibility of the Eggshell fabrication process in an architectural context. An array of printing materials are also tested, and several different reinforcement concepts are analyzed. The findings are used to produce a full-scale architectural demonstrator project. This article shows that a wide range of concrete geometries can be produced in a material-efficient fabrication process, paving the way toward mass customization and structural optimization within concrete architecture.

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“…The technology Fused deposition modelling is otherwise termed as Fused filament fabrication was invented by Scott Crump in the year 1980 [30].The most common method used in 3D Printing is fused deposition modeling. Fused deposition modeling is non-subtractive manufacturing process.…”

Section: Additive Manufacturing Techniques Used In Medical Applicatiomentioning

confidence: 99%