Annie (thesis last year) 1/16:
Hard time working with the air knife (helps to cool the plastic post extrusion)
Rate of extrusion does not vary on extruder. Not worth trying
Play with when to turn the air knife on/off (should be off at first so that the plastic sticks to base)
Luis (helped with Farzin’s research grant) 1/20:
Plastic melts between 170-240 C
Trials of form work: bucket, foam, nails, cardboard waffle (BAD), plastic bags (BAD), nylons (BAD)
When extruding straight lines, pull up before going over
Make sure to plan enough time for final model. Farzin’s project took 35 hours to fabricate.
*issues in scale. as a team, we can only book 9 hours a week.
Was done in components and zip tied together for final
Two main connects to the air hoses- one from air knife, other helps cool
Turn air knife on 2 seconds after beginning of extrusion
Output 17 = extruder
Fabric should have 10% nylon, the tighter the fabric, the easier to take off
Jeremy (previous Material Science student) 1/16:
In testing, play with straight lines first and vary speed and “smash”/offset
Testing on fabrics is productive. Could also think about other things to extrude on
Insight from Wes / Aaron 1/22:
Okay to use big robots
Will be set up to use by the end of next week for trials.
Can use pellets from last year as trials.
Will need to buy own material after test trials.
Changing diameters of extrusion tip does not help flow rate
Plastic extruder is NOT a 3d printer
Don’t use any dyes, other composites
Insight for 3d Pen:
Plastic needs to cool on contact with surface, not before
Curved extrusions between points need to be tested in different increments
Projections:
Create double curved with minimal form work, working primarily with basic structure and/or elastic fabric- stretching fabric over simple frame
Purchase material post trials next week
Fabric becomes part of the formwork/reusable formworks
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