July 2005Design Guides for PlasticsClive Maier, Econology Ltdθcon^ogyTANGRAM TECHNOLOGYThis publication is made up of a series of articles published in Plastics and Rubber Weekly as a piece work. The kind assistance of the author and PRW is acknowledged in the publication of the work.The publication will be updated in a regular basis as new sections of the guide are published by PRW.The design hints in this booklet are given in good faith and represent current good practice. The short nature of the hints means that not all information can be included. No responsibility can be taken for any errors or consequential damages resulting from using these hints.This publication may be freely reproduced except for sale or advertising purposes. It may be hosted on web sites for free downloading providing that it is used in it's entirety and that reference is made to the original publication.© Clive Maier 2004Typeset by Tangram Technology Ltd.ContentsPreface..........................................................................................1Introduction....................................................................................2Injection moulding.........................................................................4Basics1.Wall thickness .....................................................................................................52.Corners................................................................................................................63.Ribs .....................................................................................................................74.Bosses ...............................................................................................................105.Design for recycling...................................................................................
