E-Book, Englisch, 100 Seiten
Rees Understanding Injection Mold Design
1. Auflage 2013
ISBN: 978-3-446-40183-9
Verlag: Carl Hanser Fachbuchverlag
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)
E-Book, Englisch, 100 Seiten
ISBN: 978-3-446-40183-9
Verlag: Carl Hanser Fachbuchverlag
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)
These basic design principles for good mold design are the focus of this text. The designer will not find elaborate drawings of existing molds, instead he/she will learn about the many factors, which must be considered when successfully designing a mold.
Contents:
Starting New in the Mold Design Field
Basics of the Injection Molding Machine
Understanding the Basics of the Injection Mold
Before Starting to Design a Mold
Review and Follow-Up
Typical Examples
Estimating Mold Costs
Machining, Mold Materials, and Heat Treatment
Autoren/Hrsg.
Weitere Infos & Material
1;Introduction to the Series;6
2;Preface;8
3;Contents;10
4;1 Introduction;14
4.1;1.1 Economics of Mold Design;16
5;2 Starting New in the Mold Design Field;18
6;3 The Basics of an Injection Molding Machine;20
7;4 Understanding the Basics of the Injection Mold;22
7.1;4.1 Design Rules;22
7.2;4.2 The Basic Mold;22
7.2.1;4.2.1 Mold Cavity Space;22
7.2.2;4.2.2 Number of Cavities;23
7.2.3;4.2.3 Cavity Shape and Shrinkage;24
7.3;4.3 Cavity and Core;24
7.4;4.4 The Parting Line;25
7.4.1;4.4.1 Split Molds and Side Cores;26
7.5;4.5 Runners and Gates;27
7.6;4.6 Projected Area and Injection Pressure;28
7.6.1;4.6.1 Clamping Force;29
7.6.2;4.6.2 Strength of the Mold;29
7.6.3;4.6.3 Why Are High Injection Pressures Needed?;30
7.7;4.7 Venting;31
7.8;4.8 Cooling;31
7.8.1;4.8.1 Basics of Cooling;32
7.8.2;4.8.2 Plate Cooling;35
7.9;4.9 Ejection;35
7.9.1;4.9.1 Automatic Molding;38
7.10;4.10 Shrinkage;39
7.10.1;4.10.1 Variable Shrinkage;39
7.11;4.11 Alignment;40
7.11.1;4.11.1 No Provision for Alignment;40
7.11.2;4.11.2 Leader Pins and Bushings;41
7.11.3;4.11.3 Taper Lock Between Each Cavity and Core;42
7.11.4;4.11.4 Taper Locks and Wedges;43
7.11.5;4.11.5 Taper Pins;44
7.11.6;4.11.6 Too Many Alignment Features;44
8;5 Before Starting to Design a Mold;46
8.1;5.1 Information and Documentation;46
8.1.1;5.1.1 Is the Product Design Ready?;46
8.1.2;5.1.2 Are the Tolerances Shown?;46
8.1.3;5.1.3 Are the Tolerances Reasonable?;47
8.1.4;5.1.4 What are the Cycle Times?;47
8.1.5;5.1.5 What is the Expected Production?;47
8.1.6;5.1.6 What are the Machine Specifications?;48
8.2;5.2 Start of Mold Design;55
8.2.1;5.2.1 Mold Shoes;55
8.2.2;5.2.2 Mold Drawings;58
8.2.3;5.2.3 The Stack Layout;61
8.2.4;5.2.4 Selection of a Suitable Runner System;69
8.2.5;5.2.5 Venting;78
8.2.6;5.2.6 Ejection;81
8.2.7;5.2.7 Cooling;82
8.2.8;5.2.8 Alignment of Stack;86
8.2.9;5.2.9 Design Review;86
8.3;5.3 Preload;86
8.4;5.4 Mold Materials Selection;87
8.4.1;5.4.1 Effect of Expected Production;88
8.4.2;5.4.2 Forces in Molds;88
8.4.3;5.4.3 Characteristics of Steels and Other Mold Materials;88
8.5;5.5 Stack Molds;91
8.6;5.6 Mold Layout and Assembly Drawings;92
8.6.1;5.6.1 Machine Platen Layout;92
8.6.2;5.6.2 Symmetry of Layout, Balancing of Cl92
8.6.3;5.6.3 The Views;93
8.6.4;5.6.4 Completing the Assembly Drawing;93
8.6.5;5.6.5 Bill of Materials (BoM) and "Ballooning";94
8.6.6;5.6.6 Finishing Touches;94
9;6 Review and Follow-Up;95
10;7 Typical Examples;96
10.1;7.1 Containers or Other Cup-Shaped Products;96
10.2;7.2 Technical Products;100
10.3;7.3 Mold with Fixed Cores;101
10.4;7.4 Mold with Floating Cores;102
10.5;7.5 Molds with Side Cores or Splits;103
11;8 Estimating Mold Cost;105
11.1;8.1 Need for Estimate;105
11.2;8.2 Precedents;106
11.3;8.3 No Precedents;106
11.4;8.4 Methods of Estimating;107
11.5;8.5 Mold Cost and Mold Price;108
12;9 Machining, Mold Materials, and Heat Treatment;110
12.1;9.1 Machining of Mold Components;110
12.2;9.2 Materials Selection;114
12.2.1;9.2.1 Steel Properties;115
12.3;9.3 Heat Treatment;119
13;Appendix 1 CAD/CAM (Computer- Assisted Design-Computer- Assisted Manufacturing);121
14;Index;124
