Hot Runner Technology
1st Edition
Published on 1. June 2006
249 pages
978-3-446-43063-1 (ISBN)
Description
Quality and profitability of injection molding operations can be considerably influenced by the hot runner system. The many variations and design principles of hot runners are material-dependent and therefore not universally applicable. Knowing about and recognizing these limitations will make or brake a molder's success.
This book provides a comprehensive overview of the state-of-the-art in hot runner technology, advantageous design principles, and applications. The user will find the necessary basics as well as many proven designs and application examples.
Contents:
- Basic Aspects of Heat Technology
- Introduction of Hot Runner Components
- Heating of Hot Runner Manifold Blocks
- Heating of Hot Runner Nozzles
- Temperature Measuring and -Controlling
- Material Behaviour under Mechanical Stress
- Corrosion and Wear
- Screw Connections and Material Selection for High Temperatures
- Basic Aspects of Plastics Technology
- Maintenance and Storage of Hot Runner Molds
- Design of Special Hot Runner Systems and Hot Runner Molds
- Supplier of Hot Runner Systems
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Peter Unger
Hot Runner Technology
Book
06/2006
1st Edition
Hanser
€159.99
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Content
- Intro
- Contents
- Preface
- 1 Introduction
- 1.1 General Aspects of Hot Runner Technology
- 1.2 Design of Hot Runner Systems and Nomenclature of Components
- 1.3 Design of Single Components Used for Hot Runner Systems
- References for Chapter 1
- 2 Basic Aspects of Heat Technology
- 2.1 Heat Transfer
- 2.1.1 Heat Conduction
- 2.1.2 Convection
- 2.1.3 Radiation
- 2.1.4 Summary
- 2.2 Amount of Heat, Heating Capacity
- 2.3 Heat Expansion
- References for Chapter 2
- 3 Introduction of Hot Runner Components
- 3.1 Hot Runner Manifold Block
- 3.1.1 Externally Heated Hot Runner Manifold Blocks
- 3.1.2 Internally Heated Hot Runner Manifold Blocks
- 3.1.3 Insulated Runner System
- 3.1.4 Rheological Design
- 3.2 Reflector- and Thermal Insulating Sheets, Surface Coating
- 3.3 Melt Chamber Bushing
- 3.4 Distributor Bushing
- 3.5 Spacer Disks
- 3.6 Anti-Twist Device for Hot Runner Block
- 3.7 Turn Plugs
- 3.8 Hot Runner Nozzles
- 3.8.1 General Aspects
- 3.8.2 Open Hot Runner Nozzle
- 3.8.3 Open Multiple Gate Nozzles
- 3.8.4 Shut-Off Nozzles
- References for Chapter 3
- 4 Heating of Hot Runner Manifold Blocks
- 4.1 Cylindrical Cartridge Heater
- 4.2 Tapered Cartridge Heater
- 4.3 Threaded Cartridge Heater
- 4.4 Tubular Heater
- 4.5 Heater Plate
- 4.6 "Thick-Film"- Heating Element
- 4.7 Indirect Heating Using a Liquid Medium
- 4.8 Heat Pipe
- 4.9 Determination of Heating Capacity of an Externally Heated Hot Runner Manifold Block
- 4.9.1 Estimate of Required Heating Capacity
- 4.9.2 Numerical Determination of Heating Capacity to be Installed for the Heat-up Phase
- References for Chapter 4
- 5 Heating of Hot Runner Nozzles
- 5.1 Cylindrical Cartridge Heater
- 5.2 Coiled Heater
- 5.3 Resistor Heater
- 5.4 Heat Pipe
- 5.5 Indirect Heating Using a Liquid Medium
- 5.6 General Remarks Regarding Internal Heating ("Conductive Heating")
- 5.7 Indirect Heating
- 5.7.1 Thermally Conductive Torpedoes
- 5.7.2 Thermally Conductive Nozzle
- References for Chapter 5
- 6 Measurement and Control of Temperature
- 7 Material Behavior under Mechanical Load
- 7.1 Notch Effect under Static Load
- 7.2 Notch Effect under Dynamic Load
- References for Chapter 7
- 8 Corrosion and Wear
- References for Chapter 8
- 9 Screw Connections and Material Selection for Elevated Temperatures
- References for Chapter 9
- 10 Basic Aspects of Plastics Technology
- 10.1 Flow Characteristics, Viscosity, Pressure Loss
- 10.2 Thermal Stability
- 10.3 Decrease of Molecular Weight (Exemplified by PBT)
- 10.3.1 Thermal Degradation
- 10.3.2 Mechanical Degradation
- 10.3.3 Oxidative Degradation
- 10.3.4 Hydrolytic Degradation
- References for Chapter 10
- 11 Maintenance and Storage of Hot Runner Molds
- References for Chapter 11
- 12 Design of Special Hot Runner Systems and Hot Runner Molds
- 12.1 300-Fold Hot Runner System for the Production of Transistor Housings Made of Reinforced PBT
- 12.2 Hot Runner Manifold Block for Sandwich Molding
- 12.3 Hot Runner System with Balanced Filling Action
- 12.4 Hot Runner Nozzles for Small Center-to-Center Cavity Space
- References for Chapter 12
- Appendix 1: Abbreviations Used in this Book
- Appendix 2: Conversion Factors for Units of Measure
- Index
