Injection Mold Design Handbook

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Bibliographic Details
Main Author Catoen, Bruce
Other Authors Rees, Herbert
Format Electronic eBook
LanguageEnglish
Published München : Hanser, 2021.
Subjects
Injection molding of plastics > Handbooks, manuals, etc.
elektronické knihy
electronic books
Online AccessFull text
ISBN9781569908167
1569908168
156990815X
9781569908150
Physical Description1 online resource (818 p.)

Cover

Table of Contents:
  • Intro
  • Preface
  • Acknowledgments
  • The Author
  • Contents
  • 1 Introduction
  • 1.1 Benefits of Injection Molding
  • 1.2 The Injection Mold
  • 1.2.1 The Role of the Injection Mold
  • 1.3 What Is an Injection Mold?
  • 1.3.1 Elements of an Injection Mold
  • 1.4 Classification of Molds
  • 1.5 Continued Innovation in Molds and Hot Runners
  • 1.6 The Injection Molding Machine
  • 2 Overview of Plastics for Mold Design
  • 2.1 What Is Plastic?
  • 2.2 Plastics Terminology
  • 2.3 Polymer Orientation
  • 2.3.1 Shrinkage
  • 2.3.2 Multiple Shrinkages
  • 2.4 Additives
  • 2.5 Mechanical Properties of Plastics
  • 2.6 How Molten Plastics Behave
  • 2.6.1 How Plastics Flow
  • 2.6.2 Plastic Flow in Runners and Cavities
  • 2.7 Degradation
  • 2.8 Selection and Requirements for Plastic Materials
  • 3 Plastic Part Design for Mold Designers
  • 3.1 Plastic Part Drawing
  • 3.2 Product Shape: How Can the Product Best Be Molded?
  • 3.3 Parting Line (P/L)
  • 3.4 Uniform Wall Thickness
  • 3.5 L/t Ratio (Length of Flow Divided by Wall Thickness)
  • 3.6 Drafts
  • 3.7 Corners, Fillets, and Chamfers
  • 3.8 Ribs and Bosses
  • 3.9 Rim Designs
  • 3.10 Stripped Undercuts
  • 3.11 Sidewall Windows in the Part
  • 3.12 Gate Location and Number of Gates
  • 3.12.1 CAE Filling Analysis for Gate Location Optimization
  • 3.12.2 Two or More Gates per Cavity - Large Products
  • 3.12.3 Gate Dimple
  • 3.12.4 Recessed Gate
  • 3.12.5 Deep Undercuts and Mold Design Complexity
  • 3.13 Re-Design of the Product to Avoid the Need for Side Cores
  • 3.13.1 Selecting Other than the Conventional Parting Line
  • 3.14 Shape of Threads and Undercuts
  • 3.15 Need for Multi-Stage Ejection
  • 3.16 Post-Molding Operations versus Mold Complexity
  • 3.17 Plastic Part Tolerances and Effect on Mold Design
  • 3.17.1 General and Specific Plastic Part Tolerances
  • 3.17.2 Are Special Fits with Matching Products Required?
  • 3.17.3 Tolerances for the Filling Volume
  • 3.18 Stacking of Products and Free Dispensing
  • 3.19 Deliberate Mismatches for Easy Mold Design
  • 3.19.1 Mismatch at the Parting Line
  • 3.19.2 Mismatch between Two Matching Pieces, such as Box and Lid
  • 3.20 Surface Finish
  • 3.20.1 Finish of Molding Surfaces
  • 3.20.2 Texturing of Surfaces
  • 3.21 Fitting Surfaces of Mold Parts
  • 3.22 Engravings
  • 3.22.1 Engravings versus Applied Labels
  • 3.22.2 Two-Color and Two-Material Engraving
  • 3.22.3 Depth of Engravings
  • 3.22.4 Font Style and Size of Artwork
  • 3.22.5 Polarity of Engraving
  • 3.22.6 Are the Locations Selected for Engraving Practical?
  • 3.22.7 Engravings in the Walls and Bottoms of Products
  • 3.23 General Appearance of the Product
  • 3.23.1 Flatness
  • 3.23.2 Sinks and Voids
  • 3.23.3 Witness Lines
  • 3.23.4 Weld Lines
  • 3.23.5 Surface Defects (Flow Marks, Splay, Record Grooves, Haze, Jetting, Hooks, and Ripples)
  • 3.24 Identification of the Molded Piece

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