SELECTIVE LASER SINTERING (SLS)

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What is Selective Laser Sintering?

Selective Laser Sintering is a vowin.cn' target='_blank'>rapid prototyping process which produces a physical, three-dimensional object from a 3D CAD file. An SLS machine uses a computer controlled laser to sinter (melt) a thermoplastic powder, layer by layer, to create a three dimensional part.

Materials

FINE NYLON

For SLS^® parts requiring durability and fine detail.

Chemical resistance.
Excellent for living hinges.
Snap-together parts.
Heat Resistant.

Mechanical Properties
Measurement	Test Method	Value
Tensile Strength @Yield	ASTM D638	5,200 MPa (36 psi)
Tensile Modulus	ASTM D639	202,000 MPa (14,000 psi)
Tensile Elongation at Break	ASTM D640	32%
Flexural Modulus	ASTM D790	126,000 Mpa (870 psi)
Impact Strength - Notched Izod	ASTM D256	70 J/m (1.3 ft-lb/in)
Impact Strength - Unnotched	ASTM D257	1370 J/m (25.7 ft-lb/in)

GLASS FILLED NYLON

For SLS^® parts requiring improved stiffness.

Reinforced with glass beads.
Improved heat resistance.
Better chemical resistance

Mechanical Properties
Measurement	Test Method	Value
Tensile Strength @Yield	ASTM D638	2,800 MPa (19.3 psi)
Flexural Modulus	ASTM D790	413,000 MPa (2,847 psi)
Impact Strength - Notched Izod	ASTM D256	53 J/m (1.0 ft-lb/in)
Impact Strength - Unnotched	ASTM D257	443 J/m (8.3 ft-lb/in)
Shore D Hardness - @ 25° C	ASTM D2240	66

Why Use Selective Laser Sintering?

SLS is very similar to the SLA (stereolithography) prototyping process. It's best to use SLS, when complex shapes that closely resemble injection molded nylon parts are required.

A wide range of materials can be used to produce prototypes, including nylon and metals.

Large one-piece parts up to 27.6 inches long can be produced on dual-laser machines, when needed. Direct metal laser sintering (DMLS) of stainless steel and cobalt chrome is also available.

View SLS Process Video Below

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