High Speed Sintering of Polyamide 12: From Powder to Part Properties

Area of Science:

• Additive Manufacturing
• Materials Science
• Polymer Engineering

Background:

• High Speed Sintering (HSS) is a promising additive manufacturing technique for industrial-scale polymer part production.
• Limited data exists on HSS powder characteristics and achievable part properties, particularly for standard materials like polyamide 12 (PA 12).

Purpose of the Study:

• To provide a comprehensive characterization of PA 12 powder used in the VX200 HSS machine.
• To analyze the properties of PA 12 parts produced via HSS.
• To investigate the influence of part orientation and position on HSS part properties.

Main Methods:

• Powder characterization included particle size distribution, shape, thermal properties, and flowability.
• Part characterization involved assessing density, thermal, mechanical, and geometrical properties.
• Analysis considered the effects of build orientation and position within the VX200 HSS machine.

Main Results:

• PA 12 powder and HSS part properties are generally similar to those from other polymer powder bed fusion (PBF/P) processes.
• Significant differences in certain part properties were observed compared to other PBF/P methods.
• Parts manufactured using HSS exhibited notably low anisotropy.

Conclusions:

• The study establishes a baseline for PA 12 material properties in HSS, facilitating process understanding and application development.
• HSS demonstrates potential for producing high-quality polymer parts with consistent properties and low anisotropy.
• Further research can build upon these findings to optimize HSS processes for specific industrial applications.