models and additive manufacturing teppo vienamo. agenda 13:15 adf – about models – additive...
Post on 14-Dec-2015
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Agenda
• 13:15 ADF– About models– Additive technologies– Tour: • 3D printlab ville Kukko-Liedes• Machineshop Kari Kääriäinen
– Finalizing model• 15:30 ADDLab
Why to make models?
• concrete• helps thinking• physical extension of brain• sharing• milestone• testing
How to make models
• By hand– foam– paper– clay
• Manual machining• Digital– Additive technology– CNC machining
• Reproduction– Casting E.G. Silicon moulds
• Slices objects = 3D-Printing • Stacking up 2D images to 3D
objects • Simple process for
automation
Additive manufacturing
Additive manufacturing methods
• Vat Photopolymerization • Powder Bed Fusion • Material Extrusion • Material Jetting • Binder Jetting • Sheet Lamination • Directed Energy Deposition
Vat Photopolymerization– Stereolithography
• The mirror steers the laser beam to image one slice of the object
• Photocurable polymer• Part moves down• New layer is recoated
Getting part printed
• Save as stereolitography .STL– Maximum tolerance– Multimaterial print: save parts as assembly to stl,
common zero point and position in coordination• Send file to:– Aalto Arts: Osse Federley osse.federley@aalto.fi – ADDLab: Meng Wang wang.meng@aalto.fi– Mention: Plastic Product Design / Teppo Vienamo
Rough grinding• Spray paint thin layer• Grind (no 80-120
paper) until only deepest grooves have paint
• Slight grinding by 220
Surface of actual 3D-model
Base • Clean dirt, dust water etc. away• Paint with spray filler• Grinding with water (and soap) 240 -
360 paper• Fill deep grooves with 2 component
polyesther filler• Repaint by filling primer if plastics
exposes• Gradually to finer sand paper
– 360 600– The glossier finish, the finer paper– 800 fairly good– For extreme gloss the final surface is
grinded with paste 1000 - 2000
Spray painting• Solver of the primer swells the plastics
– Allow to evaporate over night• Constant color bottom• Supporting the part for painting• Spray painting
– Steady movements– Open the spray shooting of the part– Perpendicular to surface– 30 cm distance– Cavite's difficult– First thin layer, few minutes dryining– Wet layer for final surface
• If starts to run cold helps• After drying can be polished
Efects
• Effect surface, EDM – Spraying droplets to surface– Allow to dry– More droplets – Etc.
• Matt surface– Matt paint– Matt lacquer
Displays
• Colored print on paper• Colored print to back side of over head
projector film– Print behind the film– Basic color is spray-painted to the back– Spray glue
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