156B Week 6

Progress Report Week 6

After meeting with the sponsors, we confirmed their approval of our preliminary design. In the next two weeks, we will mainly focus on making some modifications on the basis of the preliminary design to finally achieve the desired effect. 

First of all, we will modify the size of the storage tank, we will increase the cross section and reduce the longitudinal section so as to reduce the volume of the outer shell without changing the overall volume of the storage tank. On the other hand, we will decrease the size of the circular layer on the bottom of the cartridge. And we confirmed that we will be using 9 hollow needles on our first prototype. 

There are also some other minor changes and we will upload the CAD file for your reference after we finish. 

Meanwhile, in the next two weeks we plan to resolve all manufacturing issues. In other words, we will consult with the staff in the machine shop and finally determine the manufacturing and assembly of our various components. Just yesterday, we have determined the materials we need to make the parts. 

Meanwhile, we have also ordered the materials online and they will be sent to us next week. When we receive the materials, we will start making our first prototype. According to the request of the sponsor, they want to have a look at our previous 3D printed prototype, so that they can make the hollow needle according to our preliminary design. We sent it to them today. Lastly, regarding the hollow needle, we finally decided to use the 32-gauge needle. That's our plan for the next two weeks.

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

• • Manufacturing the storage tank and the exterior cover layer (at machine shop CNC)

  • Dimension of the silicone insulation layer.

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

• • Arranged weekly meeting to update and assist with the project.

  • Finalized all the dimensions for the designing components.

  • Provided hollow needles

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

• • Primary focus was to explore top priorities; talk to the sponsor about it.

  • Silicon insulation layer.

  • Approval of storage tank design idea.

  • Approval of the rod attachment mechanism.

Risks and Areas of Concern

• • The structure or materials of the needles may deform/break during injection.

  • The needles arrangement across the device. 

  • Leakage of agent from the device

  • Interference between hollow needles motion and agent motion

  • Attachment/assembly of the microneedling cartridge.

  • The electric insulation layer self-seal silicone.

Resources or Information Required but not Available

Schedule

• • Ganntt chart link

  • https://docs.google.com/spreadsheets/d/1Rsep4Byl5w-ZwaOZbzAgdEkJXQq7UqNQCz2TDspl4I8/edit#gid=0

Budget (list amount spent and amount remaining)

• • • $108 Dr.Pen device

    • $8.99 tattoo needles

    • $12.29 Syringes

    • $66.9 3D printing (not included if not exceed $100)

• • Money left = $3070.72

Progress on Report and Webpage

• • finished the first draft of the report.