Prints with mjf Printing
Mult jet fusion (MJF) is a 3d printing process developed by HP. This process is ideal for manufacturing end products, prototypes, design models and complex geometries in high and low numbers. The details are printed by applying an adhesive to a thin layer of plastic powder which is then sintered using a heating element. This results in gray details with isotropic material properties and a grainy surface structure that can be painted, dyed black or polished. Other methods for 3D printing that we work with include: SLS Printing and FDM Printing.
| Process data | Value |
|---|---|
| Standard tolerance | ± 0.3% (minimum limit ±0.3 mm) |
| Layer thickness | 0.08 mm |
| Minimum wall thickness | 0.8 mm |
| Minimal detail | 0.8 mm |
| Largest component size | 370 x 274 x 375 mm |
*the above data depends on the choice of material.
Materials for MJF Printing
PA12 (Nylon 12)
PA12 is suitable for most purposes when it comes to functional prototypes, design models and small scale manufacturing. The material is dark grey, which when dyed black gives desirable surface properties in the form of scratch resistance. Compared to white SLS-manufactured PA12 which is dyed black, scratches in MJF-manufactured PA12 become dark gray instead of white.
- Fine grainy surface finish
- Dimensionally stable
- PA12 is gray unless dyed black
- Works well for most purposes and also mass production of end products
Material data PA12
| Material data | Unit | Value |
|---|---|---|
| Tensile strength (x/y/z) | MPa | 48/48/48 |
| E-module (x/y/z) | MPa | 1700/1700/1800 |
| Flexural strength | MPa | 40 |
| Flexural modulus | MPa | 1600 |
| Charpy impact test (23°C) | kJ/m² | 52 ± 2 |
| Charpy notched impact test (23°C) | kJ/m² | 4.5 ± 0.1 |
| Elongation at break (x/y/z) | % | 20/20/15 (± 2) |
| Shore D Hardness | – | 74 ± 2 |
| Density | g/dm³ | 1010 |
| Heat resistance temperature (1.82 MPa) | °C | 95 |
TPU 90A
TPU 90A is a thermoplastic elastomer based on polyurethane and is a thermoplastic variant of polyurethane rubber. TPU 90A is among the softest and most rubber-like materials we have. This material is perfect for prototypes of rubber parts or functional components where high demands are placed on abrasion resistance, wear resistance and elasticity.
- Allows for high complexity
- Rubbery and durable
- Functional prototypes and final products
Material data TPU
| Material data | Unit | Value |
|---|---|---|
| Tensile strength | MPa | 8 |
| E-module | MPa | 80 |
| Flexural modulus | MPa | 75 |
| Izod impact strength (notched 23°C) | kJ/m² | no crime |
| Izod impact strength (notched -10°C) | kJ/m² | 45 |
| Elongation at break | % | 200 |
| Fatigue 100k cycles -10°C (ASTM D1052 methode A) | No cracking | |
| Shore A Hardness | – | 88 |
| Density | g/dm³ | 1100 |
| Melting temperature | °C | 120-150 |
Values above are approximate and actual values may vary.
