Page 349 - Design for Six Sigma a Roadmap for Product Development

Theory of Inventive Problem Solving (TRIZ) 319

Biological Biological object (1)
object
with
silver 1
coating
Silver coating

It is proposed to apply a thin coat of silver to the insect and measure its
weight or amount. The coating is applied chemically in an acid solution of
silver nitrate. The surface area of the insect is measured by the change in
concentration of silver in solution (or the weight) after being coated.

Example 9.17 A Reliable Seal
Old design
Stem Toxic substance
Toxic substance (1)

1

2

Sealant Sealant (2) with
blowhole

A porous insert filled with sealant keeps a toxic agent from leaking by a
stem. This is done using a tight fit of the insert against the stem surface.
(Disadvantage: At high pressure, the toxic substance may press the seal
away from the stem, forming a blowhole.)
New design
Stem Toxic substance
Toxic substance (1)

1

2
Ferro-
Electromagnet Sealant Sealant (2) particles