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Difference between revisions of "FBP The Full Bell"
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Revision as of 21:11, 10 December 2008
The group Creative Innovations was formed as a part of an assignment in Humboldt State University's engineering class Introduction to Design. The group was assigned the task of improving the Universal Nut Sheller for the West African market. Team members are Andrew Johns, Brenda Johnson-Howell, Diana Magus and Parsa Motavalli.
The objective of this project is to reduce the cost of the current Universal Peanut Sheller. The new peanut sheller will be used in West Africa where there is a limited access to materials.
Cost- The universal peanut sheller should not cost more than the current design. Lower cost is preferable.
• Durability- The Universal Nut Sheller should be able to sustain many hours of daily usage for several years.
• Effectiveness- The Universal Nut Sheller should effectively shell a variety of ground nuts.
• Aesthetics- The Universal Nut Sheller should be aesthetically similar to that of the existing design and not overtly unappealing.
• Safety- The Universal Nut Sheller should be safe to use by an average man, woman or child above the age of 12 years old.
• Ease of Construction- The Universal Nut Sheller should be easy to assemble on site.
• Transportability- The design of the Universal Nut Sheller should be transportable. Ideally, the greater degree of transport is better without compromising other criteria.
Description of The Full Bell
In testing, the gravel mix used was stronger than the original concrete mix. We tested small bricks of the gravel mix, the original concrete mix, a mixture of cement with Styrofoam, as well as several different mixtures of adobe. Three separate tests were performed. Each brick was scored with a stiff wire brush for one minute. A twelve ounce weight was dropped from an eighteen inch height onto the bricks. Finally, the bricks were weighted on one side and twisted downward until breaking. In each test the gravel mix used in The Full Bell was more resilient.
Three inches were removed from the top of the sheller and two inches from the bottom. Figure 1 shows the Full Belly Project’s Universal Nut Sheller (left) compared to the Creative Innovation’s “Full Bell” (right).
The top three inches of the original UNS functioned primarily as a hopper. Ideally this can be replaced with any low cost material or container available at construction time. An inexpensive basket, Figure 2, was purchased from a thrift store for our prototype. The basket was then cut to fit over the top of the sheller as shown in Figure 3.
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See this example of a cost table for more on tables.
Possible alternative materials
Estimated time of construction
Discussion and Next Steps
The Full Bell sheller has successfully met its criteria of cutting the costs and keeping its effectiveness. The mold for the Full Bell can be used to make shellers of other materials as well. By experimenting with different kinds of aggregates and cement formulas, a sheller can be produced that can be lighter, stronger and more cost effective. Just by simply changing the ratio of gravel, sand and cement in the Full Bell, or by adding fly ash or fibers, the durability will remain the same or even better. The Full Bell has opened up endless possibilities of using materials such as adobe, papercrete, styrofoam and plastics.
See Help:Footnotes for more.
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