Design of injection molded plastic parts /

Detalles Bibliográficos
Clasificación:Libro Electrónico
Autor principal: Jaroschek, Christoph, 1959- (Autor)
Formato: Electrónico eBook
Idioma:Inglés
Publicado: Munich, Germany : Carl Hanser Verlag, [2022]
Temas:
Injection molding of plastics.
Plastics > Molding.
Industrial design.
Mati�eres plastiques > Moulage par injection.
Design.
injection molding.
Industrial design
Injection molding of plastics
Plastics > Molding
Acceso en línea:Texto completo
Tabla de Contenidos:
  • Intro
  • The Author
  • Preface
  • Contents
  • 1 Plastic Parts
  • 1.1 General Information
  • 1.1.1 Comparison of Designs (Conventional vs. Plastic)
  • 1.1.2 Special Features of Plastics
  • 1.1.2.1 Comparison of the Properties of Plastics and Metals
  • 1.1.2.2 Special Mechanical Behavior
  • 1.1.3 Reasons for Using Plastics
  • 1.2 Design Rules
  • 1.2.1 Special Design Features of Injection Molded Parts
  • 1.2.1.1 Demoldability
  • 1.2.1.2 Flow Path to Wall Thickness Ratio
  • 1.2.1.3 Sprue Position
  • 1.2.1.4 Avoiding Material Accumulation, Thin Wall Thickness
  • 1.2.1.5 Stiffeners
  • 1.2.1.6 Dimensional Change due to Temperature Fluctuations
  • 1.3 Dimensional Deviations between CAD and Injection Molded Part
  • 1.3.1 Shrinkage
  • 1.3.2 Warpage
  • 1.3.3 Corrective Measures for Dimensional Deviations
  • 1.4 Design of Connections
  • 1.4.1 Screw Fasteners
  • 1.4.2 Snap-Fit Connections
  • 1.4.3 Bonding and Welding of Seams
  • 1.4.3.1 Adhesive-Bonded Joints
  • 1.4.3.2 Welded Joints
  • 1.4.3.3 Film Hinges
  • 1.5 Tolerances and Dimensions
  • 1.6 Sizing
  • 2 The Injection Molding Manufacturing Process
  • 2.1 The Process and What the Designer Should Know
  • 2.1.1 Flow Path Lengths Are Limited
  • 2.1.2 Molded Part Area Determines Machine Size
  • 2.1.3 Wall Thicknesses Determine the Cooling Time
  • 2.1.4 Plastic Shrinks as It Cools
  • 2.2 Influence of the Process on Component Properties
  • 2.2.1 Weld Lines, Meld Lines
  • 2.2.2 Surface Quality
  • 2.3 Fiber Orientations Influence the Component Dimensions
  • 2.4 Forward-Looking Quality Assurance
  • 2.4.1 Sink Marks
  • 2.4.2 Jetting
  • 2.4.3 Diesel Effect
  • 2.4.4 Incomplete Filling, Burr Formation, and Deformation during Demolding
  • 2.5 Special Injection Molding Techniques
  • 2.5.1 Multi-Component Technology
  • 2.5.1.1 General Procedure
  • 2.5.1.2 Molding Techniques
  • 2.5.1.3 Component Design
  • 2.5.2 Fluid Injection Technology (FIT)
  • 2.5.2.1 Processes
  • 2.5.2.2 Component Design
  • 3 Molds
  • 3.1 General Tasks and Functions
  • 3.2 Manufacture and Costs
  • 3.2.1 General Machining
  • 3.2.2 Surfaces
  • 3.2.2.1 EDM
  • Electrical Discharge Machining
  • 3.2.2.2 Etching
  • 3.2.2.3 Laser Texturing
  • 3.2.2.4 Ceramic Surfaces
  • 3.2.3 Steels
  • 3.3 Standard Elements
  • 3.4 Melt Feed
  • 3.4.1 Cold Runners
  • 3.4.1.1 Cavity Layout
  • 3.4.1.2 Gating to Cavities
  • 3.4.1.3 Demolding of the Runner System
  • 3.4.2 Mold with Pre-Chamber Nozzle
  • 3.4.3 Insulating Channels
  • 3.4.4 Hot Runners
  • 3.4.4.1 Internally Heated Systems
  • 3.4.4.2 Externally Heated Systems
  • 3.4.4.3 Hot Runner Nozzles
  • 3.4.4.4 Cascade Technology
  • 3.5 Temperature Control
  • 3.5.1 Concepts for Temperature Control
  • 3.5.1.1 Continuous Flow Temperature Control
  • 3.5.1.2 Pulse Cooling/Discontinuous Temperature Control
  • 3.5.1.3 Variothermal or Intermittent Temperature Control
  • 3.5.2 Implementation
  • 3.6 Demolding

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