P15482: Breadfruit Shredder and Grinder

1. P15482: Breadfruit Shredder and Grinder Brittany Griffin, Sam Huselstein, Alan Kryszak, Pat Connolly, Andrew Beckmann

2. Agenda • Quick Background • - Updated Engineering Requirements • - HOQ • System Design • - Functional Decomposition • - Energy Flow • - Benchmarking • - Concept Generation • System Design Selection • - Selection Criteria • - Concept Selection • - Feasibility Analysis • - Architecture • Risk Assessment • Updated Project Plan

3. Quick Background • Haiti • Breadfruit • FouFou • Shredder and Grinder

4. Customer Requirements

5. Customer Requirements

6. Engineering Requirements

7. Engineering Requirements F1 = Contain Breadfruit F3 = Shred Breadfruit F2 = Collect Processed Breadfruit F4 = Grind Shreds

8. Feasibility • Question: How much flour can be made from one breadfruit? • Assume: Breadfruit is 70% water by weight, peel and core weigh approximately 0.2lb, shreds are completely dry (100% water reduction) • Analysis: • 3 breadfruit = $10.00 • 1 breadfruit = $1.98 • Therefore: 1 breadfruit = 1.67lb • 1.67lb * 0.7 = 0.5lb of dried fruit • 0.5lb – 0.2lb = 0.3lb • One breadfruit yields approximately 0.3lb of flour.

9. HOQ This format only allows 25 ER’s...we will need to reformat or eliminate some ER’s to make a complete HOQ.

10. Functional Decomposition Critical!

11. Shredder Decomposition

12. Grinder Decomposition

13. Energy Flow

14. Benchmarking for Functions-Shred Ribbon Fry Cutter http://images.zesco.com/pimages/518/518-d-039.jpg Apple Peeler http://ecx.images-amazon.com/images/I/7185U2IiWPL._SL1500_.jpg

15. Benchmarking for Functions-Shred Shredding Rollers http://www.lenzing-technik.com/fileadmin/_processed_/csm_grobhomogenisator_01_fc818f2f51.gif Blade Array http://www.chefscatalog.com/img/products/285x285/99884_285.jpg

16. Benchmarking for Functions-Shred Apple Peeler with Cutter http://en.wikipedia.org/wiki/Cam#mediaviewer/File:Nockenwelle_ani.gif http://tclauset.org/16_StGuides/ch13/picts/applepeeler.jpg

17. Benchmarking to Function - Grind Roll Crushers http://www.scribd.com/doc/30156582/Chapter-6

18. Benchmarking Functions - Grinder Mortar and Pestle http://i.ebayimg.com/00/s/NjUwWDY1MA==/z/DNoAAOxygPtS5q4j/$_35.JPG Hammer Mill http://www.responsiblebusiness.eu/download/attachments/2588750/hammer+mill.jpg

19. Benchmarking Functions - Human Power Bike Power http://www.lowtechmagazine.com/2011/05/pedal-powered-farms-and-factories.html Hand Crank http://www.prestowind.com/store/image/39og3/Hand_Crank_Generators_-_Wind_Generators_-_Survival_and_Emergency_Products_Crank-a-Watt_TM_Deluxe.jpg

20. Concept Generation

21. Concept Generation

22. Concept Generation

23. Selection Criteria • Doesn’t use electricity • Available in Haiti • Easy to maintain/sharpen cutter • Effort required to operate • Easy to understand • Within budget • Peels and cores (bonus)

24. Pugh Diagram Round 1

25. Feasibility • Question: Will grinding rollers need to be replaced? • Assume: Industrial rollers can be compared to style used by team, rollers used constantly for 3 months/year, Force from industrial motor > force generate from human power • Analysis: • Team goal: Product life of greater than 3 years. • 2 Manufacturers contacted through phone. • Rollers in mills must be replaced after several years in industrial applications • Since our application will only have heavy usage for 3 months every year and with less force than used in industrial applications, it is safe to assume the rollers used in our design will not need to be replaced during the lifetime of the product.

26. Feasibility • Question: Will the grinder used in Pat 2 be cost effective? • Assume: Grinder type already exists, online specifications are accurate • Analysis: • Country living grain mill • Material: • high carbon steel burrs – should not need to be replaced • Advantages: • Will not gum up if shreds are too moist • Adjustable coarseness • Easier than stone grinders • Disadvantages: • Will not grind as fine as ceramic grinders • Slow and tiring when done by hand ** not as heavily weighted • Cost for new set of grinders: $91.47 • Feasible: This is a feasible design, however, would be more costly than other options • www.onlygrainmills.com/country-living-grain-mill/ • www.einkorn.com/grinding-einkorn/

27. Feasibility Analysis • How much force is required to grind dried breadfruit? • Once a particle size is selected we can estimate the grind roller capacity and the force needed to crush the particles. https://html1-f.scribdassets.com/18nnuf2o1sjeg0m/images/3-9d3751ac00.png

28. Pugh Diagram Round 2

29. Pugh Diagram Round 3

30. Selected Concepts

31. Architecture Team 1: Apple peeler with trimming mechanism and grinding rollers MSD team Hand crank Overall machine structure Grinder Haitian farmers Haitian farmers Container Quality test Shredder Container

32. Architecture Sam 2: Shredding rollers and Grinding rollers MSD team Bike power Overall machine structure Grinder Haitian farmers Haitian farmers Quality test Container Shredder Container

33. TRIZ • Mechanical mortar and pestle http://www.retsch.com/uploads/sl/23747f6755854fd697495c7a8201dd93.jpg Benchmarking: • Highly technical design • Uses motors • High quality (expensive) materials Quick Feasibility: • Difficult to make tolerances needed • Difficult to scale to larger size • Materials most likely will not be available in Haiti • Design would be robust and would need to be prototyped to determine if flour quality grain sizes are plausible.

34. Risk Assessment

35. Risk Assessment

36. Updated Project Plan

37. What could we learn from a trip to Haiti? • Possible market value of our product • Most/Least popular aspects about our design • What type of environment our product will spend a majority of its life • What materials are actually available in Haitian markets

38. Questions? • Do you have any design concerns?