RPI Sunglasses Albert Lo -Troy High School Christopher Quinones -Troy High School Our Design A Bright Idea  Supports RPI  Tasteful fashion accessory  Helps shield eyes while still a fun item  Involves a variety of processes Parts  Frames (front and back)  Sides (x2)  Lenses (x2)  Screws, nuts, and washers (x2) Frames  Polycarbonate injection molding The two halves are ultra-sonic welded together to enclose and secure the lens. Sides  ABS injection molding  CNC machining  Laser etching Lenses • • • • Purchased “Solar” gray color sheet Laser cut Acrylic Lenses Screws, Nuts, and Washers  Purchased  Fastens the assembly together Assembly  Attaching the front frame and side frames Fastening the Assembly • • • • Height of screw: 5mm Height of side frame: 3.25mm Height of hex nut: 1.6 0.15mm extra Processes Involved  Plastic injection molding  Frames and sides  CNC machining  Bore holes in the frames and sides  Ultra sonic welding  Connects the two frames together  Laser Cutting  Engrave details  Cut lenses Materials Cost Item Unit price Total Unit Cost Source Screw $.03 $25.00 Boltdepot.com Nut $.02 $14.00 Boltdepot.com Washer $.01 $9.00 Boltdepot.com Lens plastic $.05/in2 $135.00 Tapplastics.com $183.00 ------------------------ TOTAL--------------- • With an approximation of $200 to produce 400 pairs of glasses, this design is well under the $3000 budget • It costs $0.50 to manufacture one pair of sunglasses For screws, washers, and nuts: http://www.boltdepot.com/Product-Details.aspx?product=6844 For plastic sheets: http://www.tapplastics.com/product/plastics/cut_to_size_plastic/acrylic_sheets_transparent_colors/519 Questions?