RPI Sunglasses

Albert Lo-Troy High School

Christopher Quinones-Troy High School

Our Design

A Bright IdeaSupports RPITasteful fashion accessoryHelps shield eyes while still a fun itemInvolves 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.

SidesABS injection moldingCNC machiningLaser etching

Lenses

• Purchased• “Solar” gray color sheet• Laser cut• Acrylic

Lenses

Screws, Nuts, and WashersPurchasedFastens the assembly together

AssemblyAttaching 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 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

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

Questions?