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3D Printing in the Classroom
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Micromanufacturing
• Current micromanufacturing methods make relatively flat objects– alignment of layers hard to
achieve– process very complex and
expensive
• Flat objects called 2-D or 2.5-D
The Challenge: Lack Truly 3-D Microfabrication MethodsThe Challenge: Lack Truly 3-D Microfabrication Methods
Example of 2.5D objects
The Solution: Microstereo LithographyThe Solution: Microstereo Lithography
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3-Dimensional Printing
• Work of Professor Nicholas Fang in nanoscale optical imaging
• Idea is to mimic a complicated and expensive lab setup in an inexpensive way
• Use equipment normally found in a school classroom
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3-Dimensional Printing
• So, can’t take $ 500,000 machine into classroom – what can students do?
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In the Classroom
• Uses materials readily available to teachers– Materials for elevators available at hardware stores
• Successfully done in several classrooms• Appropriate for multiple disciplines
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3-Dimensional Printing
computer with PowerPoint image
data projector
magnifying glassmirror
elevatorproduct (3-d object)
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Light-Activated Polymer
• uv light reacts with initiator to create two radicals
• Radicals each have single free electron
+
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Light Activated Polymer
• Radical bonds with monomer
• Now single free electron at end of chain
+
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Light Activated Polymer
• Repeats until two ends with free electrons interact and bond
+
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Elevator Design
• Drawer slide provides smooth movement
• T-nut and threaded screw controls motion
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Slicing the 3D Object
• 3D object are constructed by slices
• Overlapping between layers is generally required
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Examples of Objects
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Examples of Objects
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Examples of Objects
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Examples of Objects
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Examples of Objects
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Examples of Objects
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Examples of Objects