Page 376 - Design for Six Sigma a Roadmap for Product Development

346 Chapter Nine

Bills Press Plate

Pressure
Floor guide

Pressure

Gate roller
Drive roller

Carriage pinch roller
Partial rubber
roller
Figure 9.10 Design of paper isolation mechanism (solution 2).

partial rubber roller is used to satisfy FR 1 and FR 6 because its friction
coefficient is large at one time and small at another time when it
turns. Thus, the technical contradiction is transformed to the physical
one and the contradiction is overcome using TRIZ separation
principles. In Fig. 9.10, two DPs are integrated into one part and
five components are used to satisfy six functional requirements
independently.
The design equation is

{ } [
0 0 0 0 0 ] { }
FR 1
DP 1
0
0

0
0
0
FR 2
DP 2

0
0
0
0
0
FR 3
DP 3

0

0
0
0
0
DP 4
FR 4
0
FR 5

0
0
0 0 0 0
0 DP 5
0
0
FR 6 DP 6
This is the uncoupled design. It is clear that the design solution in
Fig. 9.10 is better because it is the uncoupled design and also has a
simpler structure. Simple structure means that less information is
needed and the structure is easy to produce.