additive manufacturing (SLS (selective laser sintering) (process (is a…
SLS (selective laser sintering)
is a process which uses laser selectively to trace the surface of powder & sinters the material together.
The system slices the part into slices, thickness: 0.005 - 0.006"
The other powder feed piston also lowers to accommodate any surplus material,
which the levelling roller transfers across the build area.
Deposited powder is heated to a temperature just below its melting point.
Laser draws one cross section of the desired part to sinter the powder particles.
Un-sintered powder remains to support the next layer, which is then distributed,
levelled, and sintered.
The part-building cylinder then raises to allow the part to be removed after cooling.
Excess powder is cleaned off the part by brushing or air-blowing.
no post- production curing is
required with this system
sent in assembly file , STL file
will stay in lung if breathed in
thus done in enclosed environment
hardened by laser
supplied by 2 powder catrideges
Levelling roller transfers the powder to the part cylinder
PC in Windows OS
Atmosphere control unit
maintains a set temperature on the air flowing into the process chamber
regulates the nitrogen atmosphere used in the unit.
12" diameter, 12"deep
it lowers to the desired layer thickness
ability to provide self support
excess powder can be reused
filled with photopolymerizable liquid resin
its lowered subsequently into the vat
Its a recoater system that spreads high viscosity resin
CAD output: STL
layer height: 0.01mm - 0.05mm
built from bottom up
when done, part is raised out of the vat.
support is removed if necessary
part is cleaned
Post curing apparatus for the final cure in UV light chamber
a roll of plastic.
melted and dry very fast
z axis moved with platfrom moving down
feature more than 45 degrees in support