Transcription of PLASTIC INJECTION MOLDING TOLERANCE GUIDE
1 Star Prototype Manufacturing Co., Ltd All rights on 1 of 2 Dimensional Tolerances mmDimension1 to 20(+/-mm)21 to 100(+/-mm)101 to 160(+/-mm)for each 20mm over 160 add1 to 20(+/-mm)21 to 100(+/-mm)ABS/PC PPO/PPE 30% 30% 20% 20% 30%GF / Flatness TolerancesDimension0-100(+/-mm)101-160 (+/-mm)0-100 (+/-mm)101-160 (+/-mm)ABS/PC Blend PPO/PPE 30% 30% , 20% , 20% 30% Diameter Tolerances mmDimension0-3(+/-mm) (+/-mm) (+/-mm)14-40(+/-mm)0-3(+/-mm) (+/-mm) (+/-mm)14-40(+/-mm) 20% , 20% 30% Higher CostCommercial ToleranceCommercial TolerancePrecision Higher CostCommercial TolerancePrecision Higher CostWarpage is due to the difference between the mold shrinkage rates in the direction of the mold flow and across the flow.
2 The efect is more noticable in fiber filled plastics. The major factor is different wall thickness as a thick section normally shrinks more than a thinner section. Mold design, gate position and process control can minimize this effect, however, the basic material behavior cannot be corrected 100%. Therefore a practical TOLERANCE must be negotiated with the respective production 100required for all materialsproject review PLASTIC INJECTION MOLDING TOLERANCE GUIDE Star Prototype Manufacturing Co., Ltd All rights on 2 of 2 Blind Hole Depths Tolerances mmDimension1 to 6(+/-mm) to 14(+/-mm)Over 14(+/-mm)1 to 6(+/-mm) to 14(+/-mm)Over 14(+/-mm)ABS/PC , 30% 20% , 20% 30% Tolerances mmDimensionup to 100(+/-mm)up to 100(+/-mm)ABS/PC Blend , 30% , 30% , 20% , 20% , 30% Higher CostCommercial TolerancePrecision Higher CostPlease note that the real achievable tolerances are very dependent on your design.
3 This document serves as a GUIDE only. Star Prototype can not be held legally liable for the tolerances given in this document. -End of Document-Commercial Toleranc
