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Final project
week16:Composite
* group assignment:
produce test coupons for your composite fabrication process(es)
* individual assignment:
read the safety data sheet (SDS) and technical data sheet (TDS)
for the resins that you're using
design and fabricate a 3D mold (~ft2)
and produce a fiber composite part in it,
with resin infusion and compaction
Composites
group assignment
We tested burlap composites. We tried 1 to 5 multi layers of it.
Our epoxy is Korean.
Here is the link to get datasheet.
Point
-The ratio of epoxy is 2:1(Adehsive:Hardener).
-3~4 minutes for mixing.
-6~8 hours for first tack curing time.
-24 hours for full curing.
-1 hours at the temperature of 50 to 60ºc for thermal curing.
-Wear latex gloves and mask for protection.
To do it, we spread soybean oil as releasing agent.
We spread it into packaging pack.
And then inhaled with vaccum cleaner.
That is the basic process of composite.
my assignment
At first, my file was like the above.
The side was hard to cut.
So we should change the side of it.
I chose to 'back' of surface.
Now it's okay to cut.
rough cut setting
finish cut setting
I already explained feedrate and rpm on week7
Isopink is different material from wood.
That is the proper feedrate and rpm for Isopink.
ss
I used 10mm flat endmill for rough cut.
12mm ball endmill for finish cut.
CNC was cutting.
The result.
With almost same process as group assignment, I put vinyl above the result.
Because I had to seperate burlap from isopink.
Result
Packing.
We should wait 24 hours to get result.
(Because that is the time needed epoxy harden.)
Done~!
Downloads
my file