MIT's 2.008 class focused on introducing students to modern manufacturing with four areas of emphasis: manufacturing processes, equipment/control, systems, and design for manufacturing. An integral part of the course was a group project designing a yo-yo and fabricating the parts for a 50-unit production run.
My team's progress blog can be found here, but is summarized below.
Team Gumball Production Video
My team wanted to design a fun, yet simple yo-yo, and we settled on designing a gumball machine inspired design.
Each half of the yo-yo consisted of three parts, striking a delicate balance between the overall look of the design and the complexity of the assembly.
The "base" part (in white above) and the "ring" part (in red above) were injection molded into aluminum molds, and the "bubble" part (in transparent, above), was thermoformed over an aluminum mold.
Further following the gumball machine inspiration, this yo-yo was also able to store candy inside the bubble piece!
Base Part
Ring Part
Bubble Part
The final yo-yo, with candy!