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RPI Sunglasses
Albert Lo-Troy High School
Christopher Quinones-Troy High School
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Our Design
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A Bright IdeaSupports RPITasteful fashion accessoryHelps shield eyes while still a fun itemInvolves a variety of processes
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Parts Frames (front and back)
Sides (x2)
Lenses (x2)
Screws, nuts, and washers (x2)
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Frames Polycarbonate injection molding
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The two halves are ultra-sonic welded together to enclose and secure the lens.
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SidesABS injection moldingCNC machiningLaser etching
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Lenses
• Purchased• “Solar” gray color sheet• Laser cut• Acrylic
Lenses
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Screws, Nuts, and WashersPurchasedFastens the assembly together
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AssemblyAttaching the front frame and side frames
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Fastening the Assembly• Height of screw: 5mm• Height of side frame: 3.25mm• Height of hex nut: 1.6• 0.15mm extra
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Processes InvolvedPlastic injection molding
Frames and sides
CNC machiningBore holes in the frames and sides
Ultra sonic weldingConnects the two frames together
Laser CuttingEngrave detailsCut lenses
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Materials CostItem Unit price Total Unit
CostSource
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
TOTAL---------------
$183.00 ------------------------
• 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 plastic sheets: http://www.tapplastics.com/product/plastics/cut_to_size_plastic/acrylic_sheets_transparent_colors/519
For screws, washers, and nuts: http://www.boltdepot.com/Product-Details.aspx?product=6844
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Questions?