Models and additive manufacturing

Teppo Vienamo

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

Powder Bed Fusion

Material Extrusion

Material Jetting

http://www.makeuseof.com/tag/what-is-3d-printing-and-how-exactly-does-it-work/

Binder Jetting

http://blog.nus.edu.sg/u0804594/common-rp-techniques/d-3dp/

Sheet Lamination

http://www.custompartnet.com/wu/laminated-object-manufacturing

Directed Energy Deposition

http://blog.cafefoundation.org/?p=8410

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

Finalizing additive model

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

print

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

Product graphics

• Vinyl cutter• Print and clue

Sources

• Ko-15.4126 Production Technology Special Topics (2014) 3D-Printing Prof Jouni Partanen