Georg Menges Walter Michaeli Paul Mohren How to Make Injection Molds Third Edition HANSER Hanser Publishers, Munich Hanser Gardner Publications, Inc., Cincinnati Translated and revised edition of "Anleitung zum Bau von SpritzgieBwerkzeugen", 5th Edition, 1999 by Prof Dr.-Ing Georg Menges, Prof Dr.-Ing Walter Michaeli and Ing Paul Mohren, Institut fur Kunststoffverarbeitung in Industrie und Handwerk an der Rhein.-Westf Technischen Hochschule Aachen (Institute for Plastics Processing, Technical University of Aachen) Translated by Rolf J Kahl and Raymond Brown Distributed in the USA and in Canada by Hanser Gardner Publications, Inc 6915 Valley Ave Cincinnati, OH 45244, USA Fax:+1 (513)527 8950 http://www.hansergardner.com Distributed in all other countries by Carl Hanser Verlag Postfach 86 04 20, 81631 Munchen, Germany Fax: +49 (89) 99 830-269 http://hanser.de Library of Congress Cataloging-in-Publication Data Menges, Georg, 1923[Anleitung zum Bau von Spritzgiesswerkzeugen English] How to make injection molds - 3rd ed / Georg Menges, Walter Michaeli, Paul Mohren; [translated by Rolf J Kahl and Raymond Brown] p cm Includes bibliographical references and index ISBN: 1-56990-282-8 Injection molding of plastics I Michaeli, Walter II Mohren, Paul III Title TP1150.M3813 2000 668.4'12-dc21 00-046238 Die Deutsche Bibliothek — CIP-Einheitsaufnahme Menges, Georg: How to make injection molds / Georg Menges ; Walter Michaeli; Paul Mohren [Transl by Rolf J Kahl and Raymond Brown] - ed - Munich : Hanser; Cincinnati : Hanser Gardner, 2000 Einheitssacht.: Anleitung fur den Bau von SpritzgieBwerkzeugen ISBN: 3-446-21256-6 The use of general descriptive names, trademarks, etc in this publication, even if the former are not especially identified, is not to be taken as a sign that such names, as understood by the Trade Marks and Merchandise Marks Act, may accordingly be used freely by anyone While the advice and information in this book are believed to be true and accurate at the date of going to press, neither the authors nor the editors nor the publisher can accept any legal responsibility for any errors or omissions that may be made The publisher makes no warranty, express or implied, with respect to the material contained herein All right reserved No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying or by any information storage and retrieval system, without permission in writing from the publisher Copyright © Carl Hanser Verlag, Munich, 2001 Typesetting by Cicero Lasersatz, Germany Printed in Germany by Kosel P r e f a c e to t h e 3rd Edition Injection molds are high-precision tools whose smooth-operation on a day-to-day basis is vital to the economic success of many plastics processors Consequently, errors in design and construction of molds can have grave consequences That is where this book comes in Building on the earlier editions, it draws extensively both on the literature and on the development work carried out at the Institute for Plastics Processing in the Technical University of Aachen with the aid of substantial private and public research funding We are especially grateful to those who participated in this edition and to those who laid the foundations for it in earlier editions, namely Dr H Bangert, Dr P Barth, Dr W Hoven-Nievelstein, Dr O Kretschmar, Dr M Paar, Dr G Potsch, Dr Th W Schmidt., Dr Ch Schneider, Prof E Schiirmann and Prof S Stitz We are indebted to the co-workers and students in the institute who contributed to the success of this book through their unstinting work and their personal commitment As they are too numerous to mention, we trust that Ms G Nelissen, Ms I Zekorn and Mr W Okon will accept our thanks on their behalf Finally, we extend our appreciation to Carl Hanser Verlag, and especially to Dr W Glenz and Mr O Immel, for taking the manuscript and turning it into such a distinctive and attractive book G Menges W Michaeli P Mohren The following contributors helped to revise a n d u p d a t e this n e w edition: Chapter Prof Dr F Klocke A Karden Chapter Prof Dr A Biihrig Polaczek Prof Dr F Klocke A Karden Dr M Langen Prof Dr E Schmachtenberg Dr M Polifke Chapter Prof Dr H Schluter Dr V Romberg-Forkert Chapter P Niggemeier Chapter Chapter Dr F Ehrig J Berthold Dr C Brockmann C P Cuttat Dr F Ehrig C Hopmann C Ronnewinkel Chapter Dr A Rogalla Chapter Dr F Ehrig A Spennemann Dr J Zachert Chapter P Niggemeier Chapter 11 Dr F Ehrig Chapter 12 Dr M Stommel Chapter 13 Dr N Kudlik Chapter 14 Dr P FiIz H Genoske Dr A Biswas Dr K Schlesinger Chapter 15 Dr A Feldhaus Chapter 16 Dr H Recker Dr O Schnerr-Haselbarth Chapter 18 R Gorbach Chapter 20 Dr A Rogalla C Brockmann E Henze