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14. mechanical design, machine design (Apr 30, 2014)
Do the mechanical design for my final project
I would like to use some local common resources, especially
renewable biomass resources, for my final project. In order to
use the appropriate material in the appropriate component of my
product prototype, I started to research on the material
characteristics and how the material could be applied to the
Rice straw is produced as a by-product from rice cropping, and
has thermal, cushioning, and aeration properties. Therefore, it
has been used for making various crafts of daily use in Japan. I
made the rope of rice straw, and then plan to learn ropework and
use the rope as a back support cushion so that we do not hurt
our back when we carry a tank of water on the back. I would also
like to make a thermal bowl to keep the temperature of warm
water even if only slightly.
Photo of me during rice planting last season.
A wisp of rice straw from home in Shinjo, Okayama, Japan.
Photo of me during making rice straw rice straw.
The sample of rice rope we made.
Bamboo has also long been used for fabricating various
constructional materials and products of daily use, because of
its mechanical properties including flexural strength, toughness
and elasticity. Most bamboos have hollow structure, therefore we
are able to use it as a material of small container, chute, and
Thin bamboo from the grove behind my working studio.
The process of working bamboo: from left to right.
I found the project on the Bamboo and Digital Fabrication by Fab Lab
Limerick, Ireland, in the course of research on how to join
bamboo. I downloaded the 3D CAD file of some connectors and 3D
print it at 1/2 scale.
3D printed plastic connectors, designed by the project of
Fab Lab Limerick.
Cross-section shape of thin bamboo (left), fitting into
round hole (central) and hexagonal hole (right).
The bamboo is rotated freely when fitting into a round hole, and
not rotated when fitting into a hexagonal hole.
Then, I applied a thin bamboo as the rib of the umbrella-like
component to collect water, and made connecter that join these
ribs by 3D modeling and printing.
Screen capture of Project Shapeshifter, which provides an
easy way to create 3D printable models.
3D printed connector, modeled by me.
Ribs joined by the connector I made.