Why Engineers Are Choosing Multi Jet Fusion (MJF) for High-Performance 3D Printing

Unlocking the Potential of Precision Manufacturing for Complex Engineering Needs

Multi Jet Fusion (MJF) is an advanced 3D printing technology in the powder bed fusion family. It utilizes an inkjet array to selectively apply fusing and detailing agents across a powdered bed of thermoplastic nylon. The particles are then fused together through heating to create a solid layer. This technique is highly efficient, offering excellent precision and mechanical properties in the final prints.

Materials Used

The process primarily employs three types of engineering-grade nylon for printing:

• PA11 HP Nylon

• PA12

• PA12 Glass Bead

Differences Between Materials

The table below outlines the key differences between PA11 HP Nylon, PA12, and PA12 Glass Bead in terms of mechanical properties, applications, and benefits.

PA11 HP Nylon offers superior impact resistance, flexibility, and chemical resistance, making it ideal for prosthetics and sports equipment. PA12, on the other hand, provides a good balance of mechanical properties at an affordable cost, making it suitable for general prototypes and consumer products. Finally, PA12 Glass Bead is known for its enhanced stiffness and dimensional stability, making it well-suited for tooling and structural parts.

MJF 3D Printing Process

The Multi Jet Fusion (MJF) printing process involves three key steps. First, fusing and detailing agents are selectively applied by an inkjet array to the powdered bed of thermoplastic nylon. Then, heat is applied to fuse the particles together, creating a solid layer. This process is repeated layer-by-layer until the complete 3D object is formed.

Advantages of MJF Printing

MJF technology offers several advantages over traditional 3D printing techniques, including smoother surface finishes, enhanced mechanical properties, and greater design flexibility. Compared to SLS (Selective Laser Sintering), MJF-printed models possess a superior surface finish and improved mechanical strength due to the unique fusing process. Additionally, the absence of support structures during printing allows for more creative and intricate designs. The high-detail precision achieved through MJF makes it an ideal choice for producing engineering prototypes and end-use parts that require exceptional accuracy and strength.

Quality Control

SICAM uses advanced HP printers capable of ensuring build times within 72 hours. To maintain the high quality of every print, SICAM implements a rigorous quality control system called FAI+ (First Article Inspection+). This enhanced inspection process is designed to provide detailed verification of parts, ensuring they meet all specified requirements before mass production. FAI+ is especially effective for complex parts produced via MJF technology, offering engineers peace of mind that their designs are accurately and reliably manufactured.

Conclusion

Multi Jet Fusion (MJF) is an efficient and precise 3D printing technology that provides numerous benefits over traditional methods. Its ability to produce high-detail, strong, and smooth-finished prints without the need for support structures makes it a top choice for engineering-grade applications.