ABS ORANGE BORDER 021C PC COOL GRAY 10C PC COOL LEXAN PC HP4_ 6C

ABS ARCTIC WHITE 2018 COIN SILVER PC 2018 ICED BLUE PC

YELLOW MB ABS UV GREEN PC 5 EDGEGLO FL GREEN PC

ABS SKY BLUE 305C BLUE PC GREEN 376C PC

PC WHITE HANDLE CMPD PC PURPLE HANDLE CMPD ORANGE ABS

LUMEN BLUE PC ABS BLUE 7456C 2.0% Lub, 2435 PC; HC 7310-007

ABS COOL GREY 3C 2% PC BLACK 6C PC-000/20T NATURAL

PC BLACK 1 PC BLACK 2 ABS OLIVE DRAB

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CHAPTER 3 | PART DESIGN GUIDELINES Wall Thickness (mm) C o o li n g T im e ( S e c ) 40 35 30 25 20 15 10 5 0 0 1 2 3 4 ABS PC Nylon 6/6 Figure 2 - Designing for Wall Thickness Changes Bad Better Recommended Recommended Poor High Stress Ideal Figure 3 - Internal and External Radius Guidelines .5W Min Inside Rad + W Poor High Volume FIGURE 1 - Wall thickness vs. cooling time of various plastics FIGURE 2 - Designing for wall thickness changes FIGURE 3 - Internal and external radius guidelines Design Guide 9 RIB DESIGN GUIDELINES The minimum distance ribs should be spaced is three times the nominal wall thickness (3W). Solvent Solvents soften surfaces of plastic (plastic must be soluble)—best for amorphous or low crystalline plastics, such as ABS, acrylic, cellulosic, PC, PS, PPO, and vinyls. Venting Guidelines by Resin • PC: .001"–.002" depth & .250" width • PC/PSU: .002"–.003" depth & .250" width • PES: .003"–.004" depth & .250" width • PEI: .001"–.003" depth & .250" width • PP: .001"–.002" depth & .250" width • ABS: .0015"–.0025" depth & .250" width • PEEK: .002"–.004" depth & .250" width FIGURE 40 - Venting Guidelines Vent Groove Vent Land Vent FIGURE 44 - Venting guidelines FIGURE 43 - Venting areas 20 Gravi-Tech CHAPTER 5 | PROCESS OPTIMIZATION Process optimization ensures a quality process and minimizes cycle time.