© Pearson & GNU Su-Jin Kim Plastics Manufacturing Processes Rapid prototyping 3d CAD Real part.

PlasticsPlasticsManufacturing ProcessesManufacturing Processes

Rapid prototyping

• 3d CAD Real part

Rapid prototyping

• Making a physical prototype directly from 3D CAD drawing.

1. CAD solid model2. Translation to STL format3. Slice the model into layers4. Send data to RP machine5. Curing each layer by laser

Rapid Prototyping Usage

3D Printing

• Roller spreads powder• Inkjet traces the shape of each section

http://ma.gnu.ac.kr/vod/Plastic/3d_printer.MP4

http://ma.gnu.ac.kr/vod/Plastic/3d_pirinter_objet.mpeg

SLA (Stereo Lithography Apparatus)

• Vat filled with photo-curable liquid resin• Laser beam solidifies liquid resin of 2d cross-section• Elevator drops enough to cover the solid polymer with

another layer of liquid

Cured Resin

XY Scanning UV Laser Beam

Photo-curableResin (Liquid)

Top of the Liquid Elevator

SLS (Selective Laser Sintering)

• Roller spreads powder across the top of the elevator

• Laser traces the shape of each cross-section, fusing powder in the thin layer

FDM (Fused Deposition Manufacturing)

• Dispenser heats the plastic and extrudes it at the desired position. Deposited plastic solidifies to form a hardened layer.

Reference

• Polymer Mixing (W. R. Whang) : http://rmp.gnu.ac.kr/• Mechanical Properties of Composite (J. H. Choei):

http://gsnu.ac.kr/hb/11176/

© Pearson & GNU Su-Jin Kim Plastics Manufacturing Processes Rapid prototyping 3d CAD Real part.

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