Selective laser sintering (SLS) är idealt för tillverkning av slutprodukter, prototyper, designmodeller och komplexa geometrier i antal upp till 1000 st per år. Tillverkningen av detaljer sker genom att plastpulver sintras av en eller flera lasrar vilket gör att detaljerna byggs upp lager för lager. Resultatet är geometrier med isotropa materialegenskaper och en grynig ytstruktur som går att lacka, färga in eller polera. Detaljerna blåses rena med tryckluft och blästras för att få bort löst pulver från detaljerna, men visst pulver kan finnas kvar och speciellt i trånga utrymmen. För detaljer med tjockt gods används ofta skin-and-core vilket innebär att detaljen printas med en specifik väggtjocklek och får en infill-struktur med löst pulver i detaljens kärna. Andra metoder för utskrifter i 3D som vi arbetar med är bland annat SLA printing and MJF printing. Not sure which process suits your purpose best? click here.
| Process data | Value |
|---|---|
| Standard tolerance | ± 0.3% (minimum limit ±0.3 mm) |
| Layer thickness | 0.12 mm |
| Minimum wall thickness | 0.8 mm |
| Minimal detail | 0.8 mm |
| Surface finish (blasted) | 60 ± 30 Rz |
| Largest component size | 500 x 280 x 315 mm |
*the above data depends on the choice of material.
Egenskaper
Färger
*click to enlarge*
PA12 is by far the most common material for the SLS process. It is not as elastic as PP and PA11 but is harder, stiffer and can be dyed in a variety of colors. The PA12 is perfect for small-scale manufacturing, functional and visual prototypes and architectural models.
| Material data | Unit | Value |
|---|---|---|
| Tensile strength (x/y/z) | MPa | 47/47/41 |
| E-module (x/y/z) | MPa | 1600/1600/1550 |
| Flexural strength | MPa | 40 |
| Flexural modulus x | MPa | 1500 |
| 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) | % | 5/19/19 (± 2) |
| Shore D Hardness | – | 74 ± 2 |
| Density | g/dm³ | 930 |
| Heat resistance temperature (1.8 MPa) | °C | 85 |
Glass-reinforced PA12 has much higher heat resistance than regular PA12. The glass particles also provide increased stiffness and resistance to wear, which makes this material suitable for hard wear parts with low friction that must also withstand high temperatures.
| Material data | Unit | Value |
|---|---|---|
| Tensile strength (x/y/z) | MPa | 51 ± 3 |
| E-module (x/y/z) | MPa | 3200±200 |
| Flexural modulus | MPa | 2900 ± 150 |
| Charpy impact test (23°C) | kJ/m² | 35 ± 6 |
| Charpy notched impact test (23°C) | kJ/m² | 5.4 ± 0.6 |
| Elongation at break (x/y/z) | % | 6 ± 3 |
| Shore D Hardness | – | 80 ± 2 |
| Density | g/dm³ | 1220 |
| Heat resistance temperature (1.8 MPa) | °C | 110 |
PA11 is the perfect material for functional prototypes and details to be manufactured in small series where high demands are placed on strength. Compared to PA12, PA11 is grey, has higher elasticity and a slightly rougher surface structure.
| Material data | Unit | Value |
|---|---|---|
| Tensile strength | MPa | 51 |
| E-module | MPa | 1700 |
| Flexural strength | MPa | 62 |
| Flexural modulus | MPa | 1200 |
| Charpy impact test (23°C) | kJ/m² | 62 |
| Charpy notched impact test (23°C) | kJ/m² | 179 |
| Elongation at break (x/y/z) | % | 51 |
| Shore D Hardness | – | 80 |
| Density | g/dm³ | 1050 |
| Heat Resistance Temperature (HDT A/B) | °C | 47 |
PP is softer than both PA12 and PA11, which makes PP ideal for parts that need to be more flexible, such as parts with hinges and snap fasteners. The surface structure is similar to PA12 and PA11, namely grainy and smooth. If you want more rubber-like details, TPU with the MJF or FDM process is recommended.
| Material data | Unit | Value |
|---|---|---|
| Tensile strength | MPa | 21 ± 2 |
| E-module | MPa | 902 ± 4 |
| Flexural strength | MPa | 20 ± 5 |
| Flexural modulus | MPa | 693 ± 3 |
| Charpy impact test (23°C) | kJ/m² | – |
| Charpy notched impact test (23°C) | kJ/m² | – |
| Elongation at break (x/y/z) | % | 530 ± 5 |
| Shore D Hardness | – | – |
| Density | g/dm³ | 820 |
| Heat Resistance Temperature (HDT A/B) | °C | – |
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