design review #updated
TRANSCRIPT
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Manual Cassava PeelerTeam Lead: Kate Randolph
Financial Chair: Hawley HelmbrechtDesign Chair: Eddie VinciguerraCommunity Partner: Daniel Nzengya
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Project Objective:To create and distribute a machine that is able to efficiently peel cassavas for rural farms in Kenya.
End Goal:InexpensiveDurableUser FriendlySafe
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CassavaRoot Vegetable
High in Protein and Starch 1 Million Tons Produced in Kenya Every YearRelied Upon as the Main Nutrional Source
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Problem●Large Amount of Cassava Wasted Each Year
○Kenyans unable to peel cassavas before they rot
○Current peeling technique is inefficient
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Current Method in Kenya:●Currently Peeled by Hand (with a knife)
large portion of the “meat” lostnot safe difficult very time consuming
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Who would benefit from thisKenyan Farmers
Can more efficiently process their product.Can produce more product for less work.Kenyan familiesFarmers can supply more cassava products to
towns/villages.Families can process their own cassavas.
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Previous Design
● Power: Rolling across a surface
● Abrasion on inside of cylinder
● Only One Cylinder
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Testing - Current MethodMethod: Knife
Pros: ● Easy to hold
Cons: ● Could not cut through outer
peel● Not easily controlled● Easy to accidentally cut into
meat● Not as safe as grater
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Testing - Abrasion Technique
Method: Large Grater
Pros:● Cut through skin
easily
Cons:● Took off too much
of the meat
Method: Medium/Large Grater
Pros:● Did not remove as
much meat
Cons:● Still removed
substantial meat
● Did not cut through skin easily
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Testing - Abrasion Technique
Method:Medium/Small Grater
Pros:● Did not remove
much of the meat
Cons:● Left a lot of skin
behind
Method:Small Grater
Pros:● Removed
majority of skin● Did not remove
much meat
Cons:● Grater becomes
clogged easily
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Current Design● Metal/plastic tube
● used as the mold to
wrap the sheet metal around
● Abrasive material
● To be wrapped around the outside of the tube
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Current Design● Wooden Crate to House the
Abrasive Cylinders● Three Abrasive Cylinders● Cylinders Will Rotate in
Opposite Direction
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Current Obstacles●Power Source●Adjusting to Various Sizes and Shapes of Cassavas
●Peeling the cassavas evenly
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Design ImprovementsRemoved Rolling MethodInverted Abrasive Side of CylinderAdded Multiple CylindersContained Cylinders Within a BoxCreated an Inverse-Rotation Design
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Criteria for the Prototype●Efficiency
○Percent of cassava peeled○Time to peel number of cassavas
●Ease of Use○Emptying the cassava peels○Cleaning the blades
●Cost●Manufacturability
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Budget for the SemesterCurrent Semester: $400
Cassavas - $80Wooden Boxes - $50Sheet Metal - $ 100PVC Piping - $60Misc - $150
End Goal:Final Price Lower Than $300
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Semester TimelineSeptember NovemberOctober
- Evaluate obstacles and problems of old design- Brainstorm new design- Create sketch of new design- Plan materials and steps necessary to create prototype- Design Review
- Evaluate design based off of comments from design review- Collect materials- Build prototype- Find an industry partner- Meet with community partner
- Contact Kenyan farmers- Evaluate Prototype- Plan for Next Semester- Final Design Review
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Continued TimelineDecember FutureSpring Semester
- Asses work from past semester- Update Design Document- Adjust goals for next semester - Create plan for spring semester
- Reevaluate old design- Build new prototype or improve old prototype- Compare working prototype to efficiency of current Kenyan farming techniques
-Design Distribution Process for Prototypes
-Implement Prototypes in Farms in Kenya
-Improve the Product for the People in Kenya
-Plan Manufacturing Process of the Finished product
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Thank You