rpi pencil sharpener
Post on 23-Feb-2016
59 Views
Preview:
DESCRIPTION
TRANSCRIPT
RPI Pencil SharpenerSophie Connor and Katy Mix
Schoharie Central SchoolSME Contest Presentation
Pencil Sharpener
Why Make This Product?
• Practical and widely used• Variety of processes • Says “RPI”• Elegant and efficient design
Overview of Processes
• Injection Molding• Abrasive Waterjet Cutting• CNC Machining• Laser Cutting and Engraving•Ultrasonic Welding•Heat Treating
Measurements (Basic)
5 ½”
1 ¼”
3”3”2 ¾”
Gear Bank
Handle: Injection Molding
Handle
Gear Bank
Handle Pin
Handle
Handle Pin: CNC Machining
Gear Bank
Handle Lever
Handle Pin
Handle
Handle Lever: Abrasive Waterjet
Gear Bank
Handle Lever
Handle Pin
Shaft
Handle
Shaft: CNC Machining
Gear Bank
Handle Lever
Handle Pin
Shaft
Planetary Gear (attached to blade)
Blades
Handle
Blades and Attached Planetary Gear: • CNC Machining • Possible Heat Treating
Gear Bank
Handle Lever
Handle Pin
Large GearShaft
Planetary Gear (attached to blade)
Blades
Handle
Large Gear: Abrasive Waterjet
Gear Bank
• CNC Machining• shaft• blades w/ planetary gear• handle pin
• Abrasive Waterjet Cutting• large gear• handle lever
• Injection Molding• handle
Handle Lever
Handle Pin
Large GearShaft
Planetary Gear (attached to blade)
Blades
Handle
½” Diameter¾” Diameter
2” Length
3 ¾” 1 ½” Diameter
½” ¾”
2”
Sand/Garnet Base
Base
”
Cover
3”
3” 1”
Sand• Injection Molding
• base• Laser Cutting
• cover• Ultrasonic Welding
• connect cover and base
Filled with sand or recycled garnet from waterjet machine.
Drawer
Injection Molded
”
2 ¾” 2 ¾”
1 ¼”
Case
1 ½”
3” 3”
• Injection Molding• two cover pieces
• Ultrasonic welding• to connect the two and
base cover• Laser Engraving• RPI Lettering
Shaft Hole Diameter:• Front – ”• Back – ”Large Gear Diameter – 1½”
Cost
Material Amount Needed
Cost/lb Total Cost
Aluminum 110 lbs $5 $550Steel 100 lbs $1.50 $150Large Molds 2 $500 $1000Small Molds 3 $250 $750Sand (Optional)
200 lbs $0.07 $15
Plastic Donated $0Cost/Unit $6.00Total $2500
Thank you! Any questions?
top related