156B Week 6

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

Accomplishments from Previous Week

● Field testing composite sole (Jordan)

● Contacted Chris Cassidy about flexible 3D printing (Miles)

● 3D printing more hexagons to create more composite soles (Garrett)

● Reviewed patents (Garrett)

● Incorporating composite sole into shoe prototype (Ho)

Goals for Next Week (list names after each item). Use specific and measurable objectives.

● Design a shell/mold that can act as second, top layer to neoprene (Jordan)

● Using two materials together and testing (Miles)

● Printing more insole for future prototype (Garrett)

● Finding alternative for hot glue, prototyping, and testing (Garrett and Miles)

● Using shorter zipper to make water sock and trying to attach rubber with neoprene (Ho)

● Brainstorm how to test the life time of the prototype (entire team)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

● It is a good idea to make the insole too big then trim it down as it’s added to the prototype

● Surfing booties tend to have the sole be actually smaller than one’s foot.

● When it comes to comfort and wearability, drag is more important than weight/buoyancy. They’ll all be pretty light and a good swimmer will barely notice.

● Could try throwing materials and adhesives into the laundry and see if they last (for longevity and water usability tests)

● They would want to see at what temperature the material/boot breaks down at, how much it could bend before breaking, and a measurement of ankle mobility.

● Manufacturing estimates would be mostly labor, we could hire a cobbler and use their work as an estimate for an individual unit.

● Brainstorm methods of getting numerical results when testing prototypes

○ Heat breakdown

○ How long can it last in water

○ Ranking wearability/ease of taking off on a scale

○ How far can the shoe bend

● Determine cost estimation soon

● Suggested Oomoo Silicone

Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

● Creating a mold that can streamline manufacturing process

● Thermoplastic alternatives

● Large scale manufacturing could make use of punching out the hexagon shape from a thermoplastic

● Injection molding would be hard if the material is too thin

● The hexagons could likely be smaller than 1 mm thickness

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

● Explained the mathematics behind the pendulum really well!

● Great prototype images and videos to show how the prototype works!

Risks and Areas of Concern

● Attaching two different materials securely underwater

● Reducing drag

● Making the top layers puncture resistant without compromising wearability

● Comfort and durability, longevity of the boot

● Professionalism of the design itself

Budget (list amount spent and amount remaining)

● Bought shorter zippers ($15.04)

● About to purchase OOMOO Silicone, caulking gun, marine adhesive/sealant fast cure

● Previous amount spent: $290.73

● New amount spent: $305.77

● Total remaining budget: $694.23

Progress on Report and Webpage