MECE E1001X Lecture 4: LipsonDMwk5
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Department
Mechanical Engineering
Course
MECE E1001X
Professor
Hod Lipson
Semester
Spring

Description
AM Processes FDM (Fused Deposition Modeling) Principles During printing, material is deposited in single layers that fuse together to create a 3D printed object. Plastic filament is fed through a heated nozzle where the material is melted and deposited onto a build platform. As layers are deposited onto the platform, each successive layer fuses on top of the other until the 3D object is complete. Materials: thermoplastics such as ABS, Nylon, PPSF SLA (Stereolithography) Principles A specific wavelength of light solidifies the liquid via a process called photopolymerization and builds objects layer by layer. Material: photocurable plastics Polyjet Principles It works like an inkjet printer. Instead of jetting drops of ink, the printer ets drops of photopolymer that solidify when exposed to UV light. Material: thermoplastic such as polypropylene, polycarbonates Powder/Binder based 3D printing Principles A roller puts a thin layer of powder on a platform. A special print head places a binding agent at specific points, printing a thin layer of your model that is able to bind to subsequent layers Material: ceramics, multicolor, steel, high detail stainless steel LS, SLS(Selective Laser Sintering ) Principles printer is heated up to just below the melting point of the powder. The printer then spreads out an incredibly fine layer of this powder. A laser beam heats up the areas that need to be sintered together just above the melting point. The parts that were to
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