CS 285: SOLID MODELING
Lecture #26-- Tue, Nov. 27, 2007.
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Examine your parts. Explain to us how it is supposed to work.
Evaluate what you have learned from having a physical part in your hand.
Give a critique of what you have done right and what you would do differently next time.
Conversion into injection-moldable parts.
The constraints associated with injection-moldable parts:
- The geometry must be described by two halves that have no "overhangs,"
- The volume of the whole part should be kept small,
- Its connectivity should be such that the mold material can easily flow to all extremal locations.
Designing a suitable mold geometry is not an easy task!
Realizing the mold can be an expensive undertaking.
In this context you might find this interesting:
Alex Do: "Evaluation of a Short-Run Injection Molding Process with Somos NanoForm 15120 Tooling"
Comments on Project Progress Reports
Feedback Questionnaire on second batch of seven papers
Warm-up Exercise on "3D Thinking"
Consider a cube suspended from one of its corners.
Slowly lower it towards a surface of water, and let it dip in more and more, until it is finally fully immersed.
Draw the various types of cross-sectional shapes that the water surface forms around the cube for various levels of immersion.
3D Thinking
Update on Tria-Net and Ring-Tiles
Phase 5 - due Saturday, Dec. 1, 2007: Produce .STL and .SML files.
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