Kooperativer Bibliotheksverbund

UID:

Format: 1 online resource (xxi, 870 pages)

Edition: 1st ed.

ISBN: 3-446-41292-1

Content: Written for the injection molding product designer who has a limited knowledge of engineering polymers, this is a guide for the designer to decide which resin and design geometries to use for the design of plastic parts. It can also offer knowledgeable advice for resin and machine selection and processing parameters.

Note: Intro -- Dedication -- Preface -- Contents -- 1 Polymeric Materials -- 1.1 Introduction to Plastic Materials -- 1.1.1 Beginning of Plastics -- 1.1.2 Polymer Families -- 1.2 Thermoplastic Polymers -- 1.2.1 Classification of Polymers by Performance -- 1.2.2 Molecular Structure of Plastic Materials -- 1.2.3 Acrylonitrile-Butadiene-Styrene (ABS) -- 1.2.4 Acetal (POM, Polyacetal) -- 1.2.5 Polymethyl Metacrylate (Acrylic, PMMA) -- 1.2.6 High Temperature Nylon (HTN) -- 1.2.7 Ionomer Polymers -- 1.2.8 Liquid Crystal Polymer (LCP) -- 1.2.9 Polyamide (PA, Nylon) -- 1.2.10 Polyetherimide (PEI) -- 1.2.11 Polyarylate (PAR) -- 1.2.12 Polyetherether Ketone (PEEK) -- 1.2.13 Polycarbonate (PC) -- 1.2.14 Modified Polyphenylene Oxide (PPO) -- 1.2.15 Polybutylene Terephthalate (PBT) -- 1.2.16 Polyethylene Terephthalate (PET) -- 1.2.17 Polyethylene (PE) -- 1.2.18 Polytetrafluoroethylene (PTFE) -- 1.2.19 Polyphenylene Sulfi de (PPS) -- 1.2.20 Polypropylene (PP) -- 1.2.21 Polystyrene (PS) -- 1.2.22 Polysulfone (PSU) -- 1.2.23 Polyvinyl Chloride (PVC) -- 1.2.24 Styrene Acrylonitrile (SAN) -- 1.3 Thermoplastic Elastomers (TPE) -- 1.3.1 Thermoplastic Elastomer Families -- 1.3.2 Thermoplastic Polyurethane Elastomer (TPU) -- 1.3.3 Styrenic Block Copolymer (SBS) -- 1.3.4 Polyolefin Thermoplastic Elastomer (TPO) -- 1.3.5 Elastomeric Alloy Thermoplastic Vulcanized (TPV). -- 1.3.6 Melt Processible Rubber (MPR) -- 1.3.7 Copolyester Thermoplastic Elastomer -- 1.3.8 Polyamide Thermoplastic Elastomer -- 1.4 Liquid Injection Molding Silicone (LIM®) -- 1.4.1 LIM® Silicone Processing -- 1.5 Thermoset Polymers -- 1.5.1 Polyester Alkyd (PAK) -- 1.5.2 Diallyl Phthalate/Isophthalate (DAP, DAIP) -- 1.5.3 Melamine Formaldehyde (MF) -- 1.5.4 Cellulosic Ester -- 1.5.5 Cyanate -- 1.5.6 Epoxy (EP) -- 1.5.7 Phenol Formaldehyde (Phenolic, PF) -- 1.5.8 Polybutadiene (PB). , 1.5.9 Bismaleimide (BMI) -- 1.5.10 Unsaturated Polyester (UP) -- 1.5.11 Polyimide (PI) -- 1.5.12 Polyxylene -- 1.5.13 Polyurethane (PUR) -- 1.5.14 Silicone (SI) -- 1.5.15 Urethane Hybrid -- 1.5.16 Vinyl Ester (BPA) -- 2 Engineering Product Design -- 2.1 Understanding the Properties of Materials -- 2.1.1 Plastics Selection Guidelines -- 2.2 Structural Design of Thermoplastic Components -- 2.2.1 Stress-Strain Behavior -- 2.2.2 Tensile Testing of Viscoelastic Materials -- 2.3 Mechanical Properties of Materials -- 2.4 Tension and Compression Curves -- 2.5 Modulus of Elasticity (E) -- 2.6 Stress and Strain Analysis -- 2.7 Thermoplastics Elastic Design Method -- 2.7.1 Working Stress -- 2.7.2 Compressive Stress -- 2.7.3 Flexural Stress -- 2.7.4 Coefficient of Linear Thermal Expansion (α) -- 2.7.5 Poisson's Ratio (υ) -- 2.7.6 Moisture Effects on Nylon -- 2.7.7 Effects of Temperature on the Behavior of Thermoplastics -- 2.8 Stress-Strain Recovery (Hysteresis) -- 2.8.1 Creep Behavior of Thermoplastics -- 2.8.2 Creep and Rupture Under Long-Term Load -- 2.8.3 Creep and Relaxation of Thermoplastics -- 2.9 Flexural Beam Stress Distribution -- 2.10 Viscoelastic Modulus Design Method -- 2.11 Centroid, Section Area, and Moment of Inertia -- 2.12 Radius of Gyration -- 2.13 Stress Analysis of Beams -- 2.13.1 Types of Loads -- 2.13.2 Normal Stresses in Beams -- 2.13.3 Shearing Force -- 2.14 Beam Deflection Analysis -- 2.14.1 Beam Deflection by Double Integration Method -- 2.14.2 Beam Deflection Moment Area Method -- 2.14.3 Applications of Moment Area and Double Integration Methods -- 2.14.4 Beam Deflection Superposition Method -- 2.15 Column Structural Analysis -- 2.15.1 Long Slender Column Critical Load (PCr) -- 2.15.2 Column Slenderness Ratio (L / r) -- 2.15.3 Eccentrically Loaded Columns -- 2.16 Flat Circular Plates -- 2.16.1 Classification. , 2.16.2 Stress Analysis Methods -- 2.16.3 Flat Circular Plate Equations -- 2.16.4 Flat Circular Plate Stresses -- 2.16.5 Theory of Flexure Comparison -- 2.16.6 Circular Plates Simply Supported, Concentrated center Load -- 2.16.7 Flat Circular Plate under Concentrated Center Load -- 2.16.8 Flat Circular Plate with Fixed Edge -- 2.16.9 Flat Circular Plate Compensation Factor for Deflection -- 2.16.10 Flat Circular Plate Bending under Edge Boundaries -- 2.17 Torsion Structural Analysis -- 3 Structural Designs for Thermoplastics -- 3.1 Uniform and Symmetrical Wall Thickness -- 3.1.1 Part Geometries Difficult to Mold -- 3.1.2 Wall Draft Angle per Side -- 3.2 Structural Rib Design -- 3.2.1 Rib Strength Analysis Method -- 3.3 Internal Sharp Corners and Notches -- 3.4 Injection Molded Thermoplastic Bosses -- 3.5 Injection Molded Thermoplastic Threads -- 3.6 Collapsible Core for Molding Internal Threads -- 3.7 Preferred Standard Thread Forms for Thermoplastics -- 3.7.1 Thermoplastic Threads Creep Effects -- 3.8 Injection Molded Products with Undercuts -- 3.9 Injection Molded Integral Life Hinges -- 3.9.1 Injection Molded Integral Life Hinge Design -- 3.9.2 Mold Design Considerations for Hinges -- 3.9.3 Proper Gate Design for Life Hinges -- 3.10 Conventional Types of Pin Hinges -- 3.11 Metal Inserts for Thermoplastic Encapsulation -- 3.11.1 Machined Metal Threaded Insert Tolerances -- 3.11.2 Thermoplastic Boss Wall Thickness for Metal Inserts -- 3.11.3 Press/Lock Slotted Metal Insert Installation After Molding -- 3.11.4 Cold Forged Metal Inserts for Encapsulation -- 3.11.5 Threaded Female Metal Inserts -- 3.11.6 Metal Inserts Anchorage for ThermoplasticEncapsulation -- 3.11.7 Metal Insert Encapsulating Process Problems -- 3.11.8 Special Metal Inserts Anchorage for Encapsulation -- 3.11.9 Electrical Lead Inserts for Encapsulation. , 3.11.10 Inserts Preparation for Molding Encapsulation -- 4 Thermoplastic Gearing Design -- 4.1 Classification of Gears -- 4.1.1 Gears Parallel to the Shaft Axis -- 4.1.2 Bevel Gears, Nonparallel and Intersecting Shafts -- 4.1.3 Hypoid Gears, Nonparallel and Nonintersecting Shafts -- 4.1.4 Gears for Straight Linear Motion -- 4.2 Standard Injection Molded Thermoplastic Gears -- 4.2.1 Selection of Thermoplastic Resins for Gears -- 4.2.2 Horsepower Equations for Gears -- 4.2.3 Spur Gear Terminology and Definitions -- 4.3 Properties Required for Injection Molded Thermoplastic Gears -- 4.4 Thermoplastic Spur Gear Design Requirements -- 4.4.1 Gating Effects on Thermoplastic Gear Roundness Dimensions -- 4.4.2 Multifunction Designs with Thermoplastic Gears -- 4.4.3 Mounting Thermoplastic Gears on Metal Shafts -- 4.4.4 Standard Spur Gears, Equations, and Calculations -- 4.4.5 Spur Gear Pitch Backlash -- 4.4.6 Standard Spur Gear Tooth Size Selection -- 4.4.7 Standard Gear Total Composite Tolerances -- 4.5 Tolerances and Mold Shrinkage of Thermoplastic Gears -- 4.6 Standard Helical Gears -- 4.7 Standard Straight Bevel Gears -- 4.8 Standard Worm Gears -- 4.8.1 Standard Worm Gear Analysis -- 4.10 Plastic Gearing Technology Designs -- 4.10.1 Spur and Helical Gears PGT-1 Tooth Design -- 4.10.2 Spur and Helical Gears PGT-2 Tooth Design -- 4.10.3 Spur and Helical Gears PGT-3 Tooth Design -- 4.10.4 Spur and Helical Gears PGT-4 Tooth Design -- 4.10.5 Plastic Gearing Technology Tooth Form Design Variables -- 4.10.6 Maximum Allowable Outside Diameter DO (Max.) -- 4.10.7 Spur Gear Tooth Form Comparison -- 4.10.8 Mating Spur Gears Tooth Form Comparison -- 4.10.9 PGT Spur Mating Gears Strength Balance -- 4.10.10 PGT Close Mesh Center Distance Between Spur Gears -- 4.10.11 Maximum Close Mesh Center Distance -- 4.11 PGT Helical Thermoplastic Gearing. , 4.11.1 PGT-1 Helical Mating Gears Strength Balance -- 4.11.2 PGT-1 Helical Mating Gears Center Distance -- 4.12 PGT Spur and Helical Gears Horsepower Rating -- 4.12.1 PGT Gear Horsepower Equation Basic Parameters -- 4.13 PGT Spur and Helical Gear Specifications -- 5 Plastic Journal Bearing Design -- 5.1 Introduction -- 5.2 Materials Used for Journal Bearings -- 5.2.1 Babbitt Journal Bearings -- 5.2.2 Bronze Journal Bearings -- 5.2.3 Sintered Porous Metal Journal Bearings -- 5.2.4 Plugged Bronze Journal Bearings -- 5.2.5 Carbon-Graphite Journal Bearings -- 5.2.6 Cast-iron Journal Bearings -- 5.2.7 Wooden Journal Bearings -- 5.2.8 Rubber Journal Bearings -- 5.2.9 Self-Lubricated Thermoplastic Journal Bearings -- 5.3 Hydrodynamics of Lubrication -- 5.4 Journal Bearings Design for Lubrication -- 5.5 Journal Bearing Design Principles -- 5.5.1 Journal Bearing Nomenclature and Equations -- 5.5.2 Thermoplastic Journal Bearing Axial Wall Thickness -- 5.5.3 Mounting Thermoplastic Journal Bearings -- 5.6 Split Bushing Thermoplastic Journal Bearings -- 5.7 Self-Centering Thermoplastic Journal Bearings -- 5.8 Journal Bearing Load Carrying Contact Surface (C) -- 5.9 Load Reaction Across the Length of Thermoplastic Bearing -- 5.10 Injection Molded Journal Bearings Process Defects -- 5.11 Factors Affecting Journal Bearing Performance -- 5.12 Factors Affecting Journal Bearing Dimensions -- 5.12.1 Length-to-Inside Diameter Ratio of Journal Bearings -- 5.12.2 Types of Service and Motion of Journal Bearings -- 5.12.3 Thermoplastic Journal Bearing Annealing Effects -- 5.12.4 Acetal Homopolymer Moisture Absorption Effects -- 5.12.5 TFE and Nylon 6/6 Moisture Absorption Effects -- 5.12.6 Temperature Effects on Thermoplastic Journal Bearings -- 5.12.7 Thermal Effects on Thermoplastic Journal Bearing Clearances -- 5.13 Journal Bearing Pressure-Velocity (PV) Limits. , 5.13.1 Methods to Determine the PV Limits of Plastics.

Additional Edition: ISBN 3-446-40309-4

Language: English