Week17 : Wild Card Composites

We made some coupon in goup work. Group assignmet is here

I select composites as a wildard. The resin that we used was polyester resin as follows.
This resin is hardened by mixing hardener. The time for become solid is about 3 hours.

We read SDS at first. The resin is Japanese one, so there is only Japanese SDS (Safety Data Sheet). As described in SDS, we opened the window and made a state with good ventilation. Actually the smell was pretty intense. And we prepared we prepared protective glasses and disposable gloves.

Some test coupones are made at first.
But after waiting 3 hours, those coupons did not become solid. The cause was considered to be insufficient stirring. I was using a small container, so I could not vigorously stir it. So, we changed the container for stir.

After thoroughly stirring, I made some coupons. those were ,non-compaction one, compaction one, 1〜3 piece fabric.
The compaction ones were compressed with a clamp.

Following picture is non compaction one.

After making that coupon, I recognized that the hardness was insufficient with one piece of fabric. And non-compaction was not uniform in thickness.

I decided to make arm protector that fits individual size.
I used scanned data that I made week6.


I applied resin to the mold as same process as making coupons.

After applying the resin, the mold and resin applied fabric was made compaction with a compaction bag. Furthermore, it pressed down from above with a bag containing water.


After waiting 3 hours, arim protector was completed !

Files can be downloaded from here.