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Unformatted text preview: Massachusetts Institute of Technology 2.008: Design and Manufacturing I I Professor Jung-Hoon Chu n Problem Set 5 Problem 5-1. Casting (a) I would like to make one bronze casting of my face, life size, and hollow. How would you do this? Solution: I would consider using a lost-wax method. First make an approximation of my face in plaster (one that is slightly smaller than my real face). Then apply a layer of wax to this slightly smaller mold. Then have a sculptor sculpt the wax into my face. At this point, I have a wax positive of my face which is built upon a solid plaster core that is, the wax itself is only a shell. (In a lost-wax method, the metal replaces the wax and so it is critical that the wax here is only a shell.) At this point, dip the wax positive in a slurry and build a plaster mold around it, adding venting holes and risers and making sure that the bottom of the mold is connected to the outside shell. After letting this dry, melt the wax out of the mold. Finally, pour the liquid metal into the mold and let it...
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This note was uploaded on 02/24/2012 for the course MECHANICAL 2.008 taught by Professor Jung-hoonchun during the Spring '04 term at MIT.
- Spring '04