3D SYSTEMS, INC.
75-D059 REV_A
9
RECYCLING MATERIAL
After a print, loose material can be sifted and reused in another print . Consistent recycling procedures are important in order
to maintain consistent material properties . If recycling procedures are not followed, problems such as variable shrinkages and
surface imperfections like “orange peel” may appear .
The DuraForm TPU Elastomer material is a very fine blend of small particles. As you run prints, the material is exposed to heat
and energy . As a result, the particles in the used powder tend to stick together forming larger particles . You can combat this
trend with sifting and blending .
• Sifting removes undesirable particles from the used powder .
• Blending adds new particles of appropriate size .
• Blending also helps combat the changes in material melt viscosity of the used powder by creating a final blend with
uniform material melt viscosity that shows less variance from blend to blend .
Both DuraForm TPU Elastomer part cake powder and overflow powder need to be sieved through a 70 Tensile Bolt Cloth screen.
BLENDING FRESH AND USED MATERIAL
• The recommended powder ratio for DuraForm TPU Elastomer material is:
DuraForm TPU
Fresh (virgin) Powder
33.3%
Overflow Powder
33.3%
Good Part Cake
Powder
33.3%
CLEANING UP THE SLS SYSTEM
Material may build up on the roller and in other areas in the print chamber . Refer to the procedures in the
for the following cleaning information:
• Cleaning the SLS System Between Prints
• Cleaning the Laser Window
• Cleaning the IR Sensor
