156B Week 7
Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Injection machine assembled by Mark.
Experimental setup built by James and protocol written by Kaleb - will measure force, time to melt,
Each team member focusing on a key area of the injection machine to optimize.
3D model of the system is currently being designed on Autodesk Fusion 360.
Accomplishments from Previous Week
Connected with sponsors over Slack.
Met with Professor Delson to give project updates and asked for advice about project decisions and methodology.
Preparations made for experiment to measure:
Time to heat
Time to melt plastic
Detect state of plastic
Test viability of aluminum barrel
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Prototyping for key components.
3D Printed Molds and Mold Cage (Brian) - nylon mold to be 3D printed by Chris
Nozzle and Barrel (James) - experiment with aluminum barrel
Injection Effort (Katherine) - components to be shipped to and tested by Mark
PID Control and Measurements (Kaleb) - experiment with heating bands
Discuss with sponsors during weekly meeting and begin prototyping.
Explore variations of precious plastic injection machine done by the precious plastic community.
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Notes from continuous Slack communication and weekly Zoom meeting:
Testing with injection machine can be done by Mark.
By next presentation, want to have as much physical prototype feedback as possible to validate engineering analysis and calculations.
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Notes from the previous meeting with Professor Delson:
Discussed 3D printed mold and mold cage (Brian)
Chris will 3D print mold using nylon and ship to Mark to test out for a more accurate force measurement
Suggestion to make step by step animation
Consider threading as an alternative for people without access to welding tools
Discussed barrel/nozzle analysis (James)
Will make experimental rig
Writing thorough experimental setup / procedures (get most info out of minimum experiments)
Get force calculation and barrel heating time for extrusion
Discussed temperature sensor (Kaleb)
Drafting protocols for safety (used by both the team and DIY community)
Inertial measurement to measure speed plunger is going down (IMU)
Objectives of experiment: Time to heat, time to melt plastic, detect state of plastic, test viability of aluminum barrel
Will take photos and document experiment
Discussed linear actuator lever component with ratchet mechanism (Katherine)
Found bar clamp alternative to ratchet wheel
Reached out to Mark about testing it - Mark suggested using a force transducer first
For next meeting:
Would like a powerpoint about the experiment
Be in contact with sponsors (Slack channel).
Communicate individual work with team (3 weekly meetings).
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
N/A
Risks and Areas of Concern
Injection machine will not be delivered.
Resources or Information Required but not Available
N/A
Schedule
Weekly Meeting with Sponsors (5/13/20)
Weekly Internal Team Meetings (3 times a week)
Weekly Meeting with Prof. Delson (5/15/20)
Budget (list amount spent and amount remaining)
Total Budget: $2600
Amount Spent: $120
Budget Remaining: $2480
Progress on Report and Webpage
Week 7 Updated