Guia de diseño de plasticos

Engineering Polymers

Part and Mold Design
THERMOPLASTICS

A Design Guide

INTRODUCTION

A product of the Bayer Design Engineering Services Group, this manual is primarily intended as a reference source for part designers and molding engineers working with Bayer thermoplastic resins. The table of contents and index were carefully constructed to guide you quickly to the information youneed either by topic or by keyword. The content was also organized to allow the manual to function as an educational text for anyone just entering the field of plastic-part manufacturing. Concepts and terminology are introduced progressively for logical cover-to-cover reading.

The manual focuses primarily on plastic part and mold design, but also includes chapters on the design process;designing for assembly; machining and finishing; and painting, plating, and decorating. For the most part, it excludes information covered in the following Bayer companion publications: Material Selection: Thermoplastics and Polyurethanes: A comprehensive look at material testing and the issues to consider when selecting a plastic material. Joining Techniques: Includes information and guidelines on themethods for joining plastics including mechanical fasteners, welding techniques, inserts, snap fits, and solvent and adhesive bonding. Snap-Fit Joints for Plastics: Contains the engineering formulas and worked examples showing how to design snapfit joints for Bayer thermoplastic resins.

Contact your Bayer sales representative This publication was written to assist Bayer's customers in the designand for copies of these publications. manufacture of products made from the Bayer line of thermoplastic This publication was written specifically engineering resins. These resins include: to assist our customers in the design and manufacture of products made from the - Makrolon® polycarbonate Bayer line of thermoplastic engineering - Apec® high-heat polycarbonate resins. These resins include: -Bayblend® polycarbonate/ABS blend •- Makrolon® Polycarbonate Makroblend® polycarbonate/ polyester blend Texin® and Desmopan® •- Apec® High-Heat Polycarbonate thermoplastic polyurethane •For information on these materials, Bayblend® Polycarbonate/ ABS call 1-800-662-2927 or visit please Blend http://www. •BayerMaterialScienceNAFTA.com. Makroblend® Polycarbonate Blend • Triax® Polyamide/ABS Blend Thefollowing additional products highlighted in this publication are now • Lustran® and Novodur® ABS part of LANXESS Corporation: •- Lustran® SAN Cadon® SMA - Centrex® ASA, AES and ASA/AES •weatherable polymers Cadon® SMA - Durethan® polyamide 6 and 66, and amorphous polyamide • Centrex® ASA, AES and ASA/AES - Lustran® and Novodur® ABS - Weatherable Polymers Lustran® SAN - Pocan® PBT polyester •-Durethan® Polyamide 6 and 66, Triax® polyamide/ABS blend and Amorphous Polyamide For information on these products, please ® LANXESS in North call •America and Desmopan® Texin at 1-800-LANXESS or visit: Thermoplastic Polyurethane http://techcenter.lanxess.com/sty/ •americas/en/home/index.jsp for Pocan® PBT Polyester styrenic resins http://techcenter.lanxess.com/scp/ americas/en/home/index.jsp forpolyamide resins

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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 Bayer 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 currenttesting. 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 Bayer resins, contact your Bayer sales representative or refer to the following information sources: Bayer Engineering Polymers Properties Guide: Contains common single-point properties by resin family and grade. Bayer Plastics Product Information...