1. Aries Engineering Design Team 06/06/2008 Aries Engineering Design Team Matt Baker Pete Levno Zach Perryman Jessica Pierry Industry Advisor: Ken Millard, P.E. Faculty Advisor: David Sailor, Ph.D. Final Report

2. Project Overview Design a system to efficiently and safely remove floor tiles from heated floor systems in luxury motor coaches without damaging the heating elements

3. Product Design Specifications Original customer request was for a “heated scraper” – Still required use of open flame for initial heating Final design request was for tile removal system – Heat tile to break down adhesive – Remove tile – Remove adhesive Old process in action…

4. Product Design Specifications Critical to Quality – Safety Eliminate open flame Control heat sources and surfaces – Cost Entire tool kit must cost less than $400 – Resulting Process Time Trained operator must be able to remove tile and adhesive in less than 30 min – Electricity Usage Must run at less than 10 amps

5. External Search & Concept Evaluation Tile Preparation Heat tile using flame Dangerous Heat tile using infrared Time consuming Hot exposed surfaces Super chill tile using dry ice Wouldn’t work Heat tile using heat pad Plausible Heated Pad Chosen

6. External Search & Concept Evaluation Tile Removal Hammer & crowbar Can be dangerous Suction device Expensive and complicated Scoring device (glass cutter) Will help make hammer and crowbar less dangerous Combination of prying device and scoring device chosen

7. External Search & Concept Evaluation Adhesive Removal Heat adhesive with flame & scrape with unheated scraper Dangerous Adhesive cools while scraping Heat scraper using infrared Impractical Resistance Heated Scraper Plausible Resistance heated scraper chosen

8. Material Testing Strength of Adhesive Bond – Measure strength of adhesive bond at various temperatures – Establish temperature that adhesive breaks down 1.Samples heated to several temperatures 2.Sample pulled apart in tensile tester 3.Data collected 4.Results plotted for target temperature selection

9. Material Testing At 150°F The adhesive material became un-testable using this method By targeting 200°F, the tile removal should be easiest

10. Material Testing Heat Transfer Properties – Need to relate heat applied at surface to temperature under tile thermocouples buried underneath tile on “test board” Data collected using Labview Heat applied in W/m^2 with a heat pad

11. Material Testing Adhesive directly under pad reaches 200°F At approximately 10 minutes after heat pad is turned on Pad temperature is offset from adhesive temperature by 100°F

12. Final Design Heat pad – Support Frame & Handle – Heating elements – Temperature Controller Selected temperature controller to maintain pad temperature at 100°F above adhesive target temperature – Insulating layer Protects operator (safety) Tile Preparation

13. Final Design Tile Removal – Scoring Device Handheld tile cutter – Breaking Device Heavy steel hammer Simple yet effective – Removal Facilitator… 1” wide pry bar Tile Removal

14. Final Design Adhesive Removal – The heated scraper… Scraping blade – Embedded 150 Watt heating element for quick heat up Ergonomic handle Temperature controller – Bimetal disc thermostat – Set at 300°F to cut through adhesive as fast as possible Adhesive Removal

15. Results Time for tile and adhesive removal: – 25 minutes Cost: – >$300 Electricity usage: – 7.25 amps

16. Questions & Answers Thanks To: Ken Millard Dr Sailor Selco Products