Impact Printing

Area of Science:

• Additive Manufacturing
• Robotics
• Materials Science

Background:

• Conventional additive manufacturing (AM) processes often rely on continuous material deposition or solidification.
• Existing methods may have limitations in terms of material flexibility, build direction, and substrate compatibility.

Purpose of the Study:

• Introduce and validate Impact Printing, a novel AM method for aggregating discrete soft particles.
• Explore the principles of particle bonding through kinetic energy transformation and plastic deformation.
• Demonstrate the flexibility and potential of Impact Printing as an alternative fabrication technique.

Main Methods:

• Utilized a robotic fabrication setup with a six-axis robotic arm and a material shooting apparatus.
• Developed a process for forming, orienting, and projecting malleable discrete elements (soft particles).
• Investigated the effects of modulated shooting forces and distances on particle aggregation and compaction.

Main Results:

• Successfully demonstrated particle aggregation and self-bonding through kinetic energy conversion upon impact.
• Achieved distinct compaction ratios by adjusting shooting parameters, eliminating the need for binding agents.
• Showcased the decoupling of the deposition apparatus from the part, enabling flexible deposition on various surfaces and orientations.

Conclusions:

• Impact Printing offers a new digital fabrication method distinct from traditional AM and brick laying.
• The process leverages material cohesion and self-interlocking for bonding, reducing material waste.
• Validated Impact Printing through prototypical experiments, highlighting its potential for versatile manufacturing.