Climbing Hold Resurfacer Team Retekt: Abdullah Alenezi Mohammad Almutairi Kyle Connelly Drew Shumway Dylan Simon
Project Description Client: John Doskicz of Flagstaff Climbing Center Figure 1: Flagstaff Climbing Center Goal: Retexture indoor climbing holds to save money over time Kyle 2
Issue: Climbing holds lose texture over time. Currently no existing climbing hold resurfacing materials or tools. Figure 2: Polished Climbing Holds Kyle 3
Requirements Customer Requirements Engineering Requirements Save money 80% original texture (surface roughness 5.5x10-5in ) Climbing holds will gain usable texture while resembling original hold Cost of operation (< $3.00/hold) Can be applied to majority of hold Size of device (< 6 ft longest length) collection Durability of machine (>500 holds before Can be stored reasonably maintenance) Can recolor Color (visual color scale) Kyle 4
Solution ● Black Box Model ● Functional Decomp. ● Decision Matrix ● Pugh Chart Clean Retexture Recolor Kyle 5
Cleaning Vinegar + Water mixture is the most effective Time to clean is 30 to 60 min Before After Figure 3: Ultrasonic Cleaner test Dylan 6
Materials Tested Adhesives Aggregate Color Variable isolation of ● adhesives Epoxy Playground sand Food coloring ● particulates ● different application Smooth cast resin Fine grain silica sand Plastic dye methods Urecoat resin Small grit copper slag Acrylic paint ● additives Liquid nails Medium grit copper slag Rubber cement Concrete sand 2 concrete fortifiers Acrylic concrete mix Vinyl concrete mix Dylan 7
Texture Test Samples ● Over 50 Compositions ● Began with isolated variable testing ● Expanded on variables that produced positive results Figure 4: Portion of Test Samples Dylan 8
The Mix What’s in it Concrete fortifier ● ● Concrete for patching ● Copper slag aggregate (optional) ● Dye Water ● Figure 5: Mixture Materials Dylan 9
First of its Kind Seen below is the second ● The holds below were the first ● composition of real world testing holds real world tested Figure 6: Retextured Holds Dylan 10
Dipping Rods Figure 7: CAD and Finished Dipping Rods Drew 11
Dipping Rod ● The rubber hose expands when compressed to fill the bolt hole ● Petroleum jelly prevents texture adhesion to bolt and hose Figure 8: Testing Dipping rods Drew 12
Drying Rack Figure 9: CAD and Physical Drying Rack Drew 13
Results ● Average cost of 16 cents per hold Approximately one month until texture ● begins to wear Texture can be removed and reapplied ● The engineering requirement to restore 80% of the original texture was determined by direct client approval and a poll. The poll results of the poll are seen in figure 7 with an average rating of 8.2 out of 10. The poll shows that people believed that the Figure 10: Texture Rating retextured holds resemble 82% the texture of a brand new hold. Drew 14
Results Cont. Longest length is 4 ft ● ● Any color dye Figure 10: Longest Length Figure 11: Color Scale All engineering requirements satisfied Mohammad 15
Budget & BOM Table 2: Bill of Materials Sponsors: ○ John Doskicz ■ $1000 ○ Engineering Dept. ■ $1000 Table 1: Budget Budget $2000 Expenses $1,005.56 Remaining of the $994.44 Budget Mohammad 16
Bill of Materials Cont. Table 3: Drying Rack Bill of Materials Mohammad 17
Final Product Deliverables Figure 12: Final Product Abdullah 18
Future Work The texture can be improved with further testing Durability Operation cycle time ● Dip modifications Mixing procedure ● Figure 13: Worn Retextured Hold Abdullah 19
References [1] How to Build Climbing Walls and Make Climbing Holds, www.threeballclimbing.com/how_to.htm. “Polyurethanes.” Introduction to Polyurethanes, polyurethane.americanchemistry.com/Introduction-to-Polyurethanes/. [2] “ROCK CLIMBING HOLDS.” Rock Climbing Holds - Alumilite, www.alumilite.com/climbing-holds-materials/rock-climbing-holds. [3] Rodriguez, Juan. “Seven Additives to Make Concrete Manageable.” The Balance, www.thebalance.com/common-used-concrete-admixtures-845036. 20
Any Questions? 21
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