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Case study III

Case study III. Allow the user to grip the handle with hand so that the user can manipulate the dolly. Be fastened on the dolly frame with durability, stress concentration at bolting site, and impact resistance (goods may be dropped on the dolly).

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Case study III

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  1. Case study III

  2. Allow the user to grip the handle with hand so that the user can manipulate the dolly. Be fastened on the dolly frame with durability, stress concentration at bolting site, and impact resistance (goods may be dropped on the dolly). Mass production (a large amount of handles are guaranteed). Mid-winter so that the property assurance at low temperature. Corrosion resistance. Requirement

  3. Option 1: Use polymer to replace the permanent-mold aluminum castings as casting of aluminum is costly. Option 2: Use stainless steel to replace the permanent-mold aluminum castings as Alternative means to make it

  4. Option 1: • Use polymer to replace the permanent-mold aluminum castings as casting of aluminum is costly. • Pros: • Meeting the requirements 1, 3, 5 very well. • Cheap cost and easy manufacturing • Cons: • Durability poor • Low temperature property uncertainty Alternative means to make it

  5. Option 2: • Use stainless steel to replace the permanent-mold aluminum castings as • Pros: • Meeting all the requirements • Cons: • High cost Alternative means to make it

  6. If the winter is not so cold (not as cold as Saskatoon) or the dolly can be avoided for the very cold winter (with a certain temperature threshold), one may go with option 1. Alternative means to make it

  7. Mass production. • Polymer – low melting point. • Adding chop fiber in the polymer so that to improve its durability. Die casting for option 1

  8. Equal thickness • Pattern removal draft Design Modification

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