SLS

Selective Laser Sintering (SLS) 3D Printing

Selective Laser Sintering (SLS) is an industrial 3D printing process that is ideal for manufacturing end-use parts. In SLS, a laser selectively sinters polymer powder particles, fusing them together and building a part layer-by-layer. With some of the largest print beds, SLS machines can produce functional plastic parts with isotropic mechanical properties for detailed prototyping or low-volume production of end-use parts.  SLS is a cost-efficient production method, which our customers regularly choose for the most complex parts and those requiring extensive customization.

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SLS capabilities

Maximum build size

Standard lead time

Dimensional accuracy

Layer thickness

Minimum feature size

680 x 380 x 550 mm (26.77" x 14.96" x 21.65")

3 business days

± 0.3% with a lower limit of ± 0.3 mm (± 0.012 in)

100μm

0.8 mm (0.0314”)

 

SLS materials

SLS 3D printing uses robust powder materials that are ideal for functional prototyping and low- to-medium volume production of end-use parts.

Material

Color

Resolution

Tensile strength

Elongation at break

Heat deflection temperature

Application

Nylon (PA 12)

White, dyed black

100 μm

41-50 MPa

11-36%

146-180 °C

Prototypes, detailed and complex parts, fully functional models, and end products.

Glass-filled Nylon (PA 12)

Off-white

100 μm

30-48 MPa

6.3-9.3%

152-179 °C

Enclosures and housings, jigs, fixtures, tooling

 

How SLS stacks up against other 3D printing technologies

 

Materials

Price

Dimensional accuracy

Strengths

Build volume

Layer thickness

Min. feature size

FDM

2

$

± 0.5% with a lower limit on ± 0.5 mm

Low cost, wide range of materials

500 x 500 x 500 mm (19.68" x 19.68" x 19.68")

100-300μm

2.0 mm (0.0787’')

Industrial FDM

6

$$$

± 0.3% with a lower limit of ± 0.3 mm (± 0.012")

High level of repeatability, engineering grade materials

914 x 610 x 914 mm (35.98” x 24.01” x 35.98")

100-330μm

2.0 mm (0.0787”)

Industrial SLA

3

$

± 0.2% with a lower limit of ± 0.13 mm (± 0.005")

Smooth surface finish, fine feature details, big print area

1000 x 1000 x 600 mm (39.37" x 39.37" x 23.62")

50-100μm

0.5 mm (0.00196”)

SLS

2

$$

± 0.3% with a lower limit of ± 0.3 mm (± 0.012”)

Design flexibility, supports not required

680 x 380 x 550 mm (26.77" x 14.96" x 21.65")

100μm

0.8 mm (0.0314”)

MJF

5

$$

± 0.3% with a lower limit on ± 0.3 mm (0.012’')

Design flexibility, supports not required

380 x 285 x 380 mm (14.9"  x 11.2"  x 14.9" )

80μm

0.5 mm (0.0196”)

SLM

3

$$$

± 0.2% with a lower limit of ± 0.2 mm (± 0.00787 in)

Produces a variety of metal material parts with high strength and high temperature resistance

420 × 420 × 450 mm(16.54"  x16.54" x17.72"  )

50μm

0.8 mm(0.0314)

  • Cooling

This takes place within the build unit, though HP offers module units for natural cooling, so the build unit can be used for a new print without having to wait for the powder and part to cool.

  • Recovering unfused powder

Once the build unit has cooled down, move it to the processing station and vacuum the unfused powder into a container for later use.

  • Bead blasting

Remove any remaining powder with bead blasting, air blasting or water blasting. You can do this manually or automatically, using a tumbler, ultrasonic cleaner or vibratory finishing machine.

  • Dyeing

You can choose to dye your printed parts black. The dyeing temperature is about 90°C.

  • Inspection

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