Academy 2013 |
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Composites |
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Composites
is something I had never heard of a week ago. Composites is a technique people use to make a fiber composites. In the beginning of the week I went to the website of how to make (almost) anything to get a better picture in my mind what I was going to do this week. In there I saw a lot of interesting projects from MIT students but of course I had to come up with an idea my self. My first idea was to make eyeballs for my final project, made from fiber composites so it would be lightweight and easy to move with motors. The problem was that I thought it would be a waste of time to make a simple sphere because that is an easy shape. I then thought of making a landscape model of the famous mountain Kilimanjaro. I downloaded a model of the mountain from Google and then exported it to Rhino 4.0. In Rhino I had to make the mountain solid and put a box under it so it would stand on something Here is a picture of Kilimanjaro in Rhino
Next thing to do was to cut it out in the
Shopbot. The material I used was some green foam I
found in our Fab Lab.
Here you can see the
outcome from the Shopbot
After I got
the mold I had to figure out what material I was
going to use to make the fiber composites. I went to
all three hardware stores in Vestmannaeyjar and in
the third one I found something called Davids
Fastglas. The guys at the hardware store told me
this was the only thing they got so I had to work
with that.
Davids Fastglas
In the package from Davids
Fastglas was some glass fibre tissue which I
used to make the fiber composite. I cut the
tissue in stripes and placed it on the mountain
after that I put Hardner in the Resin and
painted it on Kilimanjaro. The instructions that
came with the package where a bit weird because
it said that I had to put 2 cm of Hardner with
every 10 ml of Resin, I have no idea why they
didn't just tell me how many milliliters I had
to use for the Hardner instead of putting it in
cm. Then I blended it and painted it on the
mountain so the tissue got stuck on there. The
tissues where a bit thin so I ripped down some
newspaper to make it thicker.
This process had to be done quickly because the liquids started to dry up in 5 minuets. The smell from the liquids was awful and should not be done inside but living in Iceland it's difficult to find a place with no wind. Here is the mountain with
newspaper and glass fibre tissue
I did some experiments with
vacuuming the air out of the mold but I wasn't
good enough doing it. The plastic bag I used
ether got stuck in the vacuum or the air got out
somehow so I gave up on that after some
experiments.
Here I am vacuuming the mold
And in the end I painted the mountain white to cover up some boring news stories |
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Vestmannaeyjar,
Iceland |