Novel High-Speed 3D Printing Method Using Selective Oil Sintering with Thermoplastic Polyurethane Powder Printing

Area of Science:

• Materials Science
• Biomedical Engineering
• Additive Manufacturing

Background:

• Existing 3D printing methods like selective laser sintering (SLS) and multijet fusion (MJF) have limitations for biomedical product manufacturing.
• SLS printing speed is insufficient, and MJF uses non-removable carbon black particles, unsuitable for medical implants.
• High-energy lasers and carbon black pose risks for biomedical applications, necessitating advanced 3D printing solutions.

Purpose of the Study:

• To introduce a new high-speed 3D printing technique.
• To address the limitations of current 3D printing technologies for biomedical applications.
• To develop an energy-efficient and safe additive manufacturing method.

Main Methods:

• Utilized hot oil droplets at 175°C as a novel fusing agent.
• Melted thermoplastic polyurethane (TPU) powder particles to define the print area.
• Replaced traditional lasers and carbon black fusing agents in high-speed 3D printing.

Main Results:

• Successfully demonstrated a high-speed 3D printing method using hot oil droplets.
• Developed an energy-efficient alternative to existing 3D printing technologies.
• Showcased the applicability of the method for printing on TPU and other flexible materials.

Conclusions:

• The hot oil droplet method provides a viable, high-speed 3D printing solution for biomedical applications.
• This technique offers a safer and more energy-efficient alternative to laser-based and carbon black-utilizing methods.
• The new method expands the possibilities for 3D printing flexible biomaterials.