This week is “composites” week. The provided materials were burlap and epoxy resin. The basic premise is to layer
burlap and epoxy on top of a mold, and then add pressure to compress the burlap.
I decided to make a “hat,” and I actually found a perfectly-sized bowl to serve as the mold:
Laser-cut burlap
![Laser-cut burlap](http://fab.cba.mit.edu/classes/863.14/people/matthew_arbesfeld/img/composites_laser_02.jpg) |
First layer on the mold is a 'release plastic'
![First layer on the mold is a 'release plastic'](http://fab.cba.mit.edu/classes/863.14/people/matthew_arbesfeld/img/composites_sealant_03.jpg) |
The resin that we used. 1 pump of hardener for 2 pumps of resin.
![The resin that we used. 1 pump of hardener for 2 pumps of resin.](http://fab.cba.mit.edu/classes/863.14/people/matthew_arbesfeld/img/composites_resin_04.jpg) |
Seal the entire composite in a vacuum bag for 4 hours.
![Seal the entire composite in a vacuum bag for 4 hours.](http://fab.cba.mit.edu/classes/863.14/people/matthew_arbesfeld/img/composites_vaccum_seal_05.jpg) |
The hat needed some help to get come off of the mold!
![The hat needed some help to get come off of the mold!](http://fab.cba.mit.edu/classes/863.14/people/matthew_arbesfeld/img/composites_pry_bar_07.jpg) |
Matt vs bowl
![Matt vs bowl](http://fab.cba.mit.edu/classes/863.14/people/matthew_arbesfeld/img/composites_metal_bowl_08.jpg) |
The final hat!
![The final hat!](http://fab.cba.mit.edu/classes/863.14/people/matthew_arbesfeld/img/composites_final_09.jpg) |