INTRODUCTION
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INTRODUCTION
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Most of the design principles covered in this manual apply to all of these resins. When discussing guidelines or issues for a specific resin family, we reference these materials either by their BMS trade names or by their generic polymer type.
The material data scattered throughout the chapters is included by way of example only and may not reflect the most current testing. In addition, much of the data is generic and may differ from the properties of specific resin grades. For up-to-date performance data for specific resins, contact your BMS sales representative or refer to the following information sources:
BMS Thermoplastic Resins Properties Guide: Contains common single-point properties by resin family and grade.
BMS Plastics Product Information Bulletin: Contains datasheet properties and molding recommendations for a specific grade.
2
BMS CAMPUS: Software containing single and multi-point data that was generated according to uniform standards. Campus allows you to search for BMS grades of resins that meet a particular set of performance requirements.
www.bayermaterialsciencenafta.com: BMS website containing product information, processing guidelines, joining information, and part/mold design recommendations online. This manual provides general information and guidelines. Because each product application is different, always conduct a thorough engineering analysis of your design, and prototype test new designs under actual in-use conditions. Apply appropriate safety factors, especially in applications in which failure could cause harm or injury.
In addition to design manuals, BMS provides design assistance in other forms such as seminars and technical publications. BMS also offers a range of design engineering services to its qualified customers. Contact your BMS sales representative for more information on these other services.
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7 Design Process
8 Defining Plastic Part Requirements
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,QMHFWLRQ0ROGLQJ ([WUXVLRQ 7KHUPRIRUPLQJ %ORZ0ROGLQJ 5RWRPROGLQJ13 Optimizing Product Function
&RQVROLGDWLRQ +DUGZDUH )LQLVK 0DUNLQJVDQG/RJRV 0LVFHOODQHRXV15 Reducing Manufacturing Costs
0DWHULDOV 2YHUKHDG /DERU 6FUDSDQG5HZRUN17 Prototype Testing
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19 Wall Thickness
22 Flow Leaders and Restrictors
24 Ribs
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30 Gussets
30 Sharp Corners
32 Draft
33 Holes and Cores
34 Undercuts
6OLGHVDQG&RUHV36 Louvers and Vents
37 Molded-In Threads
40 Lettering
40 Tolerances
42 Bearings and Gears
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