14. COMPOSITES


Assignment

Design and make a 3D mold (~ft2 /300mm²), and produce a fiber composite part in it


Lecture

text/video


image

IDEA

My plan for composites is a "Hango-Suisan" shaped sholder bag. Hango Suisan means a mess kit or Messtin in Japanese. The idea is that the bag made by straps of cloth of traditional Japanese crafted textile is eco-friendly and beautiful at same time.

photo from ysishikawa


my plan is that:

  • 1. making a 3D model
  • 2. printing the model with 3D printer
  • 3.make composites with that 3D printed object with Vaccume Bagging
  • 3D model

    First, I made a 3D model with Fusion360.

    Hangosuisan Bag by itosinex on Sketchfab

    3D printing

    I 3D printed the model with 3D printer called Solidoodle4. The CAM software I used was Repetier-Host which is a opensource cam software for 3Dprinter. The layer height was 0.3mm. It took more than 7hours and it didn't finish to print. I have to close my lab, I stopped the 3D printer and removed the unfinished model. It was still big!

    image image

    Composites

    tool

    I went to secound-hand shop then I found a 100yen T-shirt which costed about $1. I kind of like the "catch me" thing on the T-shirt, so I wanted to have it on my composites as well.

    The tools are:

  • 3D printed core
  • vaccume bag
  • towel as Breather material
  • cling film for food as release sheet
  • epoxy >>> FRP-ZONE
  • cardboard for floor protector
  • vinyl blove for protecting hands
  • paper cups for epoxy
  • chopsticks for mixing
  • weighing machine
  • image image
    measure the weight of epoxies

    Let's prepare 2 cups and epoxies. There are 2 kinds of epoxy: main resin and hardner. The ratio of the main and hardner is 5:1. I used a weighing machine to make the beautiful ratio of resins.

    IMG_3646 IMG_3643
    mixing

    After weighning the epoxies, I mixed each epoxies in the cups. Then, I conbined them together in one cup. I mixed it again well. To mix well is a key for my success.

    IMG_3659 IMG_3656

    wrapping

    After one minite mixing, let's put the epoxy on each pieces of T-shirt which was cut in parts with scissors before hand. Then, I sticked the fabric with epoxy on the 3D printed core.

    Completed the putting the fabric on 3D printed core!

    13199390_1189749067726758_541233649_o (1)

    Then, wrapped the composites with cling film as release sheet. Be careful to wrap the inside. Then, I put towels around the wrapped composite for breathing superfluous epoxy.

    image

    vaccume bagging

    Then, put the composite in a vaccume bag. Finally, it's time to vaccume! I used a normal vacuum cleaner.

    13148024_1189749324393399_1255777076_o (2)

    outcome

    After 24hours, I unpacked the vacumme bag, towel, cling film.

    image

    With sholder string it looks cuter!

    飯盒炊爨バッグかわいい Rice cocker bag is born cutely #catchme



    Extra composites without Digital Fabrication

    IMG_3659 IMG_3903 IMG_3916 IMG_3917 IMG_3924
    outcome
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    Download 3D printed core Fusion360