156B Week 4

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

• • Have 3 different types of suction cups

  • New CAD model for both Penguin (round, interlock) and Car (abstract, snap on) shapes with full shape and suction cup integration

  • Research on injection molding

Accomplishments from Previous Week

• • Jinfeng went to see suction cup supplier in Irvine and bought suction cups

  • Penguin CAD is ready for 3D print

    • 2 degree draft angles

    • Uniform wall thickness of 1.5 mm (minimum for 3D printer, it needs 5 layers of resin or ~1.25 mm)

  • Car CAD is in nearing 3D print ready

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

• • Jinfeng: Research possibilities of cheaper suction cups (different supplier, material, method, etc.)

  • Ebrahim: Finish up Car CAD and try to get Car CAD printed

  • Nima: Print Penguin prototype

  • Emmanuel: Assemble Penguin prototype (sanding edges, getting suction cup to fasten, perhaps painting if time available)

  • Everyone: Work on Report Draft

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

• • 4/23/12

  • Pleased with butterfly and car shapes (abstract, snap on lid)

    • Decided to work on car shape first

    • Discussed various options for implementing lid on the car

  • Deadline for Penguin prototype with everything on Monday of 6th week

  • Expecting Penguin prototype CAD for next meeting

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

• • 4/24/12

  • Suggested exaggerating features on car to create more eating space

  • Look at Target or Amazon for children's car toys

  • Look at ribs and fillets, etc. by taking apart plastic parts

  • General discussion on lid design

    • One material vs. two materials

    • Benchmarking of existing lid designs

    • Pros and cons

  • Suggestion of looking at Thomas Register (Thomasnet.com) for suction cups

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

Risks and Areas of Concern

• • Lid design for snap on

    • How to prototype?

  • Less high risk: Will the suction cups fasten onto 3D printed threads, or will we have to use machine shop?

Resources or Information Required but not Available

• • N/A

Schedule

• • 3D print penguin shape by May 7th

  • Final Report Draft due Fri, May 4th

Budget (list amount spent and amount remaining)

• • $698 remaining

    • Need to update with suction cup purchase, probably around $30

Progress on Report and Webpage

• • Need to update pages other than homepage, upload CAD files and pictures so far