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Engineering Polymers bayers

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Engineering Polymers bayers

Text of Engineering Polymers bayers

  • Engineering PolymersPart and Mold Design Thermoplastics A Design Guide

  • INTRODUCTION

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    1

    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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