Understanding injection mold design

Regardless of size and type of the product to be injection molded, whether small or large, with single or multiple cavities, or who designs or builds the mold, the basic mold design principles are always the same. The basic design principles for good mold design are the focus of this text.

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Bibliographic Details
Main Author Rees, Herbert, 1915-
Format Electronic eBook
LanguageEnglish
Published Munich : Cincinnati, OH : Hanser Publishers ; Hanser Gardner Publications, 2001.
Subjects
Injection molding of plastics.
elektronické knihy
electronic books
Online AccessFull text
ISBN3446401830
9783446401839
9783446215870
3446215875
1569903115
9781569903117
Physical Description1 online resource (xii, 115 pages) : illustrations

Cover

Table of Contents:
  • Intro
  • Introduction to the Series
  • Preface
  • Contents
  • 1 Introduction
  • 1.1 Economics of Mold Design
  • 2 Starting New in the Mold Design Field
  • 3 The Basics of an Injection Molding Machine
  • 4 Understanding the Basics of the Injection Mold
  • 4.1 Design Rules
  • 4.2 The Basic Mold
  • 4.2.1 Mold Cavity Space
  • 4.2.2 Number of Cavities
  • 4.2.3 Cavity Shape and Shrinkage
  • 4.3 Cavity and Core
  • 4.4 The Parting Line
  • 4.4.1 Split Molds and Side Cores
  • 4.5 Runners and Gates
  • 4.6 Projected Area and Injection Pressure
  • 4.6.1 Clamping Force
  • 4.6.2 Strength of the Mold
  • 4.6.3 Why Are High Injection Pressures Needed?
  • 4.7 Venting
  • 4.8 Cooling
  • 4.8.1 Basics of Cooling
  • 4.8.2 Plate Cooling
  • 4.9 Ejection
  • 4.9.1 Automatic Molding
  • 4.10 Shrinkage
  • 4.10.1 Variable Shrinkage
  • 4.11 Alignment
  • 4.11.1 No Provision for Alignment
  • 4.11.2 Leader Pins and Bushings
  • 4.11.3 Taper Lock Between Each Cavity and Core
  • 4.11.4 Taper Locks and Wedges
  • 4.11.5 Taper Pins
  • 4.11.6 Too Many Alignment Features
  • 5 Before Starting to Design a Mold
  • 5.1 Information and Documentation
  • 5.1.1 Is the Product Design Ready?
  • 5.1.2 Are the Tolerances Shown?
  • 5.1.3 Are the Tolerances Reasonable?
  • 5.1.4 What are the Cycle Times?
  • 5.1.5 What is the Expected Production?
  • 5.1.6 What are the Machine Specifications?
  • 5.2 Start of Mold Design
  • 5.2.1 Mold Shoes
  • 5.2.2 Mold Drawings
  • 5.2.3 The Stack Layout
  • 5.2.4 Selection of a Suitable Runner System
  • 5.2.5 Venting
  • 5.2.6 Ejection
  • 5.2.7 Cooling
  • 5.2.8 Alignment of Stack
  • 5.2.9 Design Review
  • 5.3 Preload
  • 5.4 Mold Materials Selection
  • 5.4.1 Effect of Expected Production
  • 5.4.2 Forces in Molds
  • 5.4.3 Characteristics of Steels and Other Mold Materials
  • 5.5 Stack Molds
  • 5.6 Mold Layout and Assembly Drawings
  • 5.6.1 Machine Platen Layout
  • 5.6.2 Symmetry of Layout, Balancing of Clamp
  • 5.6.3 The Views
  • 5.6.4 Completing the Assembly Drawing
  • 5.6.5 Bill of Materials (BoM) and ""Ballooning
  • 5.6.6 Finishing Touches
  • 6 Review and Follow-Up
  • 7 Typical Examples
  • 7.1 Containers or Other Cup-Shaped Products
  • 7.2 Technical Products
  • 7.3 Mold with Fixed Cores
  • 7.4 Mold with Floating Cores
  • 7.5 Molds with Side Cores or Splits
  • 8 Estimating Mold Cost
  • 8.1 Need for Estimate
  • 8.2 Precedents
  • 8.3 No Precedents
  • 8.4 Methods of Estimating
  • 8.5 Mold Cost and Mold Price
  • 9 Machining, Mold Materials, and Heat Treatment
  • 9.1 Machining of Mold Components
  • 9.2 Materials Selection
  • 9.2.1 Steel Properties
  • 9.3 Heat Treatment
  • Appendix 1 CAD/CAM (Computer- Assisted Design-Computer- Assisted Manufacturing)
  • Index

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