A new photopolymer extrusion 5-axis 3D printer

Asif, Muhammad; Lee, Juhyun; Lin-Yip, Mikyla J.; Chiang, Simone; Levaslot, Alexis; Giffney, Tim; Ramezani, Maziar; Aw, Kean C.

doi:10.1016/j.addma.2018.08.026

Cited by 30 publications

(17 citation statements)

References 20 publications

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“…3D printing the helix mold required a twostep process so the helix is printed vertically, however this could potentially be done by modifying the 3D printer with additional axes to prevent the nozzle from colliding with previously printed paths. [45] After casting, a small bubble is evident on the right side of the structure, but generally the fidelity is exceptional. Multiple channels are also simple to implement, as shown in Figure 5B.…”

Section: Evaluation Of Molding Fidelitymentioning

confidence: 99%

Controlled dissolution of freeform 3D printed carbohydrate glass scaffolds in hydrogels using a hydrophobic spray coating

Gryka

Comi

Forsyth

et al. 2019

Additive Manufacturing

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Freeform 3D printing combined with sacrificial molding promises to lead advances in production of highly complex tubular systems for biomedical applications. Here we leverage a purpose-built isomalt 3D printer to generate complex channel geometries in hydrogels which would be inaccessible with other techniques. To control the dissolution of the scaffold, we propose an enabling technology consisting of an automated nebulizer coating system which applies octadecane to isomalt scaffolds. Octadecane, a saturated hydrocarbon, protects the rigid mold from dissolution and provides ample time for gels to set around the sacrificial structure. With a simplified model of the nebulizer system, the robotic motion was optimized for uniform coating. Using a combination of stimulated Raman scattering (SRS) microscopy and X-ray computed tomography, the coating was characterized to assess surface roughness and consistency. Colorimetric measurements of dissolution rates allowed optimization of sprayer parameters, yielding a decrease in dissolution rates by at least 4 orders of magnitude. High fidelity channels are ensured by surfactant treatment of the coating, which prevents bubbles from clinging to the surface. Spontaneous Raman scattering microspectroscopy and white light microscopy indicate cleared channels are free of octadecane following gentle flushing. The capabilities of the workflow are highlighted with several complex channel architectures including helices, blind channels, and multiple independent channels within polyacrylamide hydrogels of varying stiffnesses.

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Section: Evaluation Of Molding Fidelitymentioning

confidence: 99%

Controlled dissolution of freeform 3D printed carbohydrate glass scaffolds in hydrogels using a hydrophobic spray coating

Gryka

Comi

Forsyth

et al. 2019

Additive Manufacturing

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show abstract

“…Furthermore, removing the supports may damage the printed objects [20]. Recently, multi-axis 3D printing systems have been developed to reduce the need for support structures [21][22][23]. However, adding degrees of freedom to a 3D printing system makes it challenging to define slicing and avoid collision during printing, and increases the complexity and cost.…”

Section: Introductionmentioning

confidence: 99%

Self-healing materials enable free-standing seamless large-scale 3D printing

et al. 2021

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Three-dimensional (3D) printing has had a large impact on various fields, with fused deposition modeling (FDM) being the most versatile and cost-effective 3D printing technology. However, FDM often requires sacrificial support structures, which significantly complicates the processing and increase the cost. Furthermore, poor layer-to-layer adhesion greatly affects the mechanical stability of 3D-printed objects. Here, we present a new Print-Healing strategy to address the aforementioned challenges. A polymer ink (Cu-DOU-CPU) with synergetic triple dynamic bonds was developed to have excellent printability and room-temperature self-healing ability. Objects with various shapes were printed using a simple compact 3D printer, and readily assembled into large sophisticated architectures via self-healing. Triple dynamic bonds induce strong binding between layers. Additionally, damaged printed objects can spontaneously heal, which significantly elongates their service life. This work paves a simple and powerful way to solve the key bottlenecks in FDM 3D printing, and will have diverse applications.

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“…Enferadi et al [17] and Shen et al [19] added two degrees of freedom to the platform on the Delta printer model. Grutle [20] added A and C axes to the platform on the Cartesian printer model, and Asif et al [21] added A and B axes to the extruder. Keating et al [22] and Ding et al [23] combined a robotic arm with 3D printing to increase freedom.…”

Section: Introductionmentioning

confidence: 99%

Development of Fused Deposition Modeling Using Five-Axis Machine and Printing Methods

Zhang

zhao

Liu

et al. 2021

Preprint

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Fused deposition modeling (FDM) is one of most widely used 3D printing technologies due to inexpensive equipment and materials, and easy to operate. FDM forms a 3D geometry by slicing a model along the XY-plane and assembling the resulting individual layers along the Z-axis, with extruded thermoplastic filaments. FDM printed parts usually need supporting structures, have stair step effect, and unfavorable mechanical properties. In order to address these deficiencies, a five-axis 3D printer and corresponding printing methods are proposed and developed in this paper. The 3D printer was designed five degrees of freedom through adding a platform that can rotate and swing. Based on the obtained results from different case studies, the discussed machine and methods could become more significant in industrial applications such as low cost, fabricating parts with better surface quality and lightweight structures.

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A new photopolymer extrusion 5-axis 3D printer

Cited by 30 publications

References 20 publications

Controlled dissolution of freeform 3D printed carbohydrate glass scaffolds in hydrogels using a hydrophobic spray coating

Controlled dissolution of freeform 3D printed carbohydrate glass scaffolds in hydrogels using a hydrophobic spray coating

Self-healing materials enable free-standing seamless large-scale 3D printing

Development of Fused Deposition Modeling Using Five-Axis Machine and Printing Methods

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