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3.042 Materials Project Laboratory Design Review

3.042 Materials Project Laboratory Design Review. Team No-Drip. Tania Chan Michele Dufalla Jacqueline Greene. 3.042 Materials Project Laboratory Design Review. Team No-Drip. Tania Chan Michele Dufalla Jacqueline Greene. New Goal. +.

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3.042 Materials Project Laboratory Design Review

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  1. 3.042 Materials Project Laboratory Design Review Team No-Drip • Tania Chan • Michele Dufalla • Jacqueline Greene

  2. 3.042 Materials Project Laboratory Design Review Team No-Drip • Tania Chan • Michele Dufalla • Jacqueline Greene

  3. New Goal + http://www1.istockphoto.com/file_thumbview_approve/1168596/2/istockphoto_1168596_plastic_can_container.jpg, http://www.baproducts.com/spigot.jpg

  4. Plastic Joining • Fasteners • Hinges • Hot Die • Fusion and Hot Wire/Resistance Welding • Hot Gas Welding • Induction/Electromagnetic Welding • Press Fits/Shrink Fits • Snap Fits • Spin Welding • Staking/Cold Forming • Threads • Ultrasonic Welding • Vibration Welding • Lasers • Adhesives • Solvents **List from Joining of Plastics by Jordan Rotheiser (2nd ed.)

  5. Plastic Joining • Fasteners • Hinges • Hot Die • Fusion and Hot Wire/Resistance Welding • Hot Gas Welding • Induction/Electromagnetic Welding • Press Fits/Shrink Fits • Snap Fits • Spin Welding • Staking/Cold Forming • Threads • Ultrasonic Welding • Vibration Welding • Lasers • Adhesives • Solvents **List from Joining of Plastics by Jordan Rotheiser (2nd ed.)

  6. Hot Plate Welding(from Joining of Plastics by Jordan Rotheiser (2nd ed.)

  7. Max Temp = 120°C Melt Temp = 130°C Max Temp = 80°C Melt Temp = 120°C HDPE vs. LDPE http://www.dynalabcorp.com/technical_info_hd_polyethylene.asp http://www.dynalabcorp.com/technical_info_ld_polyethylene.asp

  8. Method http://www.cooking.com/images/products/shprodde/743196.jpg, http://www.flagstaff.az.gov/images/pages/SC581/plastic%20bag.JPG

  9. Extrusion http://www.flagstaff.az.gov/images/pages/SC581/plastic%20bag.JPG http://www.midi-classics.com/i/p19228.gif

  10. Sample prep • Plastic (HDPE, LDPE) was cut in 1x6 in strips • Samples were welded together with a clothes iron, pressed together and allowed to cool at room temperature • Last week tested initial control samples of varying thicknesses, as well as ability of LDPE to bond with HDPE.

  11. 90º Peel Test INSTRON 1/16” LDPE 3x1 in contact area 1 in wide 1/8” HDPE Free-moving stage

  12. Shear Test 1/8” HDPE 4 layers of clear LDPE film (0.0006”) 3x1 in contact area 1/8” HDPE

  13. Results of Peel Test • 1/16 in LDPE was non-uniformly bonded to the 1/8 HDPE (due to greater thickness, more difficult to melt with iron) • Maximum Load: 0.020 kN • Could not test LDPE film:1/8 HDPE because strength of adhesion > than the tensile strength of LDPE which is 1700psi (22kN, http://www.mcmaster.com/)

  14. Results of Shear Test • The bond between the LDPE film and the 1/8 HDPE was greater than the tensile strength of the 1/8 HDPE! (4400psi / 30 MPa/ 58 kN, www.mcmaster.com). We could tell because the HDPE started necking rather than breaking the adhesive bond • Max load = 2.070 kN, Stress at Peak 55 MPa

  15. Shear Force 1/8 HDPE: LDPE film necking

  16. Immediate Next Steps… • Continue 90o Peel Test and Shear Test 3 Sets of Control Samples: • 1/8” HDPE Substrate • -White LDPE Film • -Black LDPE Film • -1/16” LDPE Sheet • -1/16” HDPE Sheet • 1/16” HDPE Substrate • -White LDPE Film • -Black LDPE Film • -1/16” LDPE Sheet • -1/16” HDPE Sheet • 1/8” LDPE Substrate • -White LDPE Film • -Black LDPE Film • -1/16” LDPE Sheet

  17. Goals of the Materials Testing Control Samples are Pure Polyethylene -no contaminations, impurities -effects of thickness, colors, processing temperature and material density on polyethylene adhesion Materials Testing Using Post-Consumer Polyethylene -ink, dye, processing agents -nonuniform density Ultimate Goal -Establish a range of temperature, pressure, time and processing condition optimal for polyethylene welding

  18. Materials Considerations: Tube to be made from recycled polyethylene Sealing between the flange and the containers surface Design of the Tap Basic Pop Rivet Design to Attach Pinch Tube at the Lid of Jerrycans Design Considerations: • Simple design, reduce production and materials costs

  19. Continue with the idea of post-consumer polyethylene recycling Melt plastic bags and extrude melt into tubes Questions to be answered: Is the process plausible? How durable is the resultant products? Can the procedure be done in the field? Tube Production

  20. Tap Production and Plastic Welding • Plastic Welding Will Be Used to Attach Tap onto Jerrycans Lids • Using the welding parameters (temperature, time and processing conditions) to attach tube to containers • Challenges: • Tricky interface between tube and containers, how to apply plastic welding? • Is plastic welding a water proof seal? • Can plastic welding withstand the chlorination in the water?

  21. Revised Gantt Chart

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