3D Printing Processes for Creating Glass and Eggshell Replicas
News Article: Paste Extrusion 3D Printing with Glass and Eggshells
A groundbreaking research development has emerged from the Hand and Machine group at the University of New Mexico, as they successfully created a method for 3D printing with glass and eggshells using paste extrusion. This innovative approach opens up a world of possibilities for creating decorative and potentially functional parts using these unconventional materials.
To begin, the researchers developed a clay-like paste by combining glass frit (fine glass powder) with methyl cellulose and xanthan gum as shear-thinning binders, and adding water to form a workable viscous paste. This mixture was then degassed in a vacuum chamber to remove bubbles before printing.
Using a clay 3D printer (paste extruder), the viscous material was deposited layer by layer to create the desired 3D models. After printing, the parts were dried and then fired in a kiln at around 750°C. This firing step burns away the binders and sinters the glass particles into a solid form, with predictable shrinkage.
For eggshells, biomaterial recipes are also being experimented with as paste compositions suitable for extrusion, requiring similar binder and processing methods to achieve printability and post-processing.
The Hand and Machine research group has previously used a paste printer to 3D print in metal. To print with glass using a paste extrusion 3D printer, a vacuum chamber is used to remove bubbles from the paste before extrusion. Additionally, a custom slicer software is required to generate tool paths accommodating the slow extrusion start and stop characteristics to avoid leaks and defects. Maintaining constant wall thickness in the printed design also helps prevent collapse or deformation during the kiln firing stage.
Eggshell-based bio-inks use similar paste extrusion setups and may include experimentation with additional organic binders or additives tailored for eggshell powder.
This approach is documented with detailed research on materials, paste composition, extrusion techniques, and post-processing steps to enable printing with unconventional materials like glass and eggshells using paste extrusion 3D printers. Presentations on the research on printing with glass and eggshells using paste extrusion 3D printers are available in the supplemental materials.
The major advantage of parts printed with eggshell paste is their biodegradability, as demonstrated by printing a biodegradable pot for plants. While the usefulness of parts printed with eggshell paste for hackers may not be as significant as those printed with glass, the research on printing with eggshells using paste extrusion 3D printers has demonstrated the abilities of the technology.
It is important to note that no new facts were provided about the firing process or the use of custom slicers in the printing of eggshell parts. The Hand and Machine research group's work on printing with eggshells using paste extrusion 3D printers has not been mentioned in previous bullet points.
The use of paste extrusion 3D printers to print with glass allows for the creation of decorative and potentially functional parts. While it is possible to print glass using a laser cutter, the paste extrusion method offers more design flexibility and opens up possibilities for creating complex shapes and intricate patterns.
For those interested in learning more about this research, the research papers on printing with glass and eggshells using paste extrusion 3D printers can be found online. The Hand and Machine research group at the University of New Mexico has demonstrated the use of paste extrusion 3D printers to print with glass and eggshells, paving the way for future developments in this exciting field.
[1] [Research Paper 1] [2] [Research Paper 2] [3] [Research Paper 3]
- The advancement in technology, specifically the use of paste extrusion 3D printers, has enabled researchers to create 3D models with unconventional materials like glass and eggshells.
- The Hand and Machine research group, using these innovative techniques, have successfully opened up new possibilities for creating decorative and functional parts, pushing the boundaries of what is achievable through 3D printing with glass and eggshells.
