典型”数值或未给出范围的数值不代表最低或最高属性；有关属性范围和最小/最大规格的信息，请咨询您的销售代表。

典型”数值或未给出范围的数值不代表最低或最高属性；有关属性范围和最小/最大规格的信息，请咨询您的销售代表。

典型”数值或未给出范围的数值不代表最低或最高属性；有关属性范围和最小/最大规格的信息，请咨询您的销售代 表。

典型”数值或未给出范围的数值不代表最低或最高属性；有关属性范围和最小/最大规格的信息，请咨询您的销售代 表。

性能範囲と規格範囲情報について、貴方の販売代表者に問い合わせてください。

典型”数值或未给出范围的数值不代表最低或最高属性；有关属性范围和最小/最大规格的信息，请咨询您的销售代表。

典型”数值或未给出范围的数值不代表最低或最高属性；有关属性范围和最小/最大规格的信息，请咨询您的销售代 表。

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). The round at the bottom of the boss should Figure 4 - Drafting Guidelines for Nominal Wall Thickness Cross section showing draft Figure 5 - Rib design guidelines 1/4˚—–1˚ 2.5W W 3W Min. .01" R Min. or .25W .75W for a low shrink material .50W for a high shrink material Figure 6 - Wall thickness changes due to rib placement 16.00 14.00 12.00 10.00 8.00 6.00 4.00 2.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 Rib-height (mm) M ax D is p la ce m en t M ag n it u d e (m m ) 0 FIGURE 4 - Drafing guidelines for nominal wall thickness FIGURE 5 - Rib design guidelines FIGURE 7 - Wall thickness changes due to rib placement FIGURE 6 - Rib height vs. stiffness 10 Gravi-Tech FIGURE 8 - Side Wall Boss Design Guidelines Sink Not Recommended Preferred Design A = Diameter = A = Primary Wall = A = 2A FIGURE 9 - Guidelines Design Guidelines 4W W 2W .75W For a Low Shrink Material .50W For a High Shrink Material FIGURE 9 - Side wall boss design guidelines FIGURE 10 - Gusset design guidelines FIGURE 11 - Structural hole design guidelines be 10% of wall thickness.