1st Edition

Mechanical Fastening of Plastics An Engineering Handbook

By Brayton Lincoln Copyright 1984

    This text provides a unique, practical and comprehensive ‘how to’ introduction to plastic-to-plastic, non-permanent assemblies. Covering a full range of information in an easy to understand, nontechnical format, this outstanding work affords the confident understanding needed to keep pace with advances in plastic technology.

    Preface
    Acknowledgements
    Introduction to Plastics
    Organization of the Plastic Goods Manufacturing Process
    Plastics Versus Metals
    A Brief Explanation of Plastics for the Fastener Engineer
    Thermoplastics Versus Thermoset ( Cross-Linked_ Plastics
    Thermoplastic Subgroups
    Thermoset Plastics
    Reaction Injection Molding and Reinforced Reaction Injection Molding Processes
    Fillers
    Plasticizers
    References
    Bibliography
    Mechanical Fasteners Used in Plastics
    Permanent Assemblies
    The Challenge: Disassembly
    Metal Thread-Forming and Thread Cutting Screws for Plastics
    Need for New Screw Types
    Thread-Rolling Screws Especially Designed for Use in Plastics
    Only Guidance Can Be Given
    References
    Bibliography
    Fastening Characteristics of Plastics
    Stiffness in Plastics
    Reinforcements: Effects on Plastics
    Crystallinity in Plastics
    Molecular Weight
    Moisture Content
    Elasticity and Resiliency in Plastics
    Crazing
    Annealing and Thermal Treatments
    Concluding Thoughts
    References
    Bibliography
    Generic Name Plastics
    Thermoplastic Resins, crystalline
    Polyolefins
    High-Performance, Thermoplastic Crystalline Polymers
    Vinyls
    High-performance, thermoplastic Amorphous Polymers
    Thermoplastic Structural Foam
    Thermoset Plastics
    Thermoset Foam Plastics
    Trademarks Cross-referenced in Chapter 5
    References
    Bibliography
    Tradename Plastics
    Bakelite-Phenolic (Union Carbide Corporation, Specialty Chemicals and Plastics Division)
    Celanex (Celanese Plastics and Specialties Company)
    Celcon (Celanese Plastics and Specialties Company)
    Cycolac (Marbon Division, Borg-Warner Chemicals)
    Delrin ( E. I. Du Pont de Nemours and Co)
    Durez (Occidental Chemical Corporation)
    Fiberesin (Formerly Made by United States Gypsum)
    Gafite-Gaftuf ( GAF Corporation, Engineering Plastics Department)
    Genal (General Electric Company, Specialty Plastics Division)
    Glaskyd (American Cyanimid Company, Organic Chemicals Division)
    Glastic (Glastic Corporation)
    Kralastic (Uniroyal Chemical , Division of Uniroyal, Inc.)
    Lexan (General Electric Company, Specialty Plastics Division)
    Merlon (Mobay Chemical Company)
    Minlon (E. I. Du Pont de Nemours and Co)
    Moplen (USS Novamont Inc.)
    Noryl ( General Electric Company, Specialty Plastics Division)
    Nylafil (Fiberfil Division, Dart Industries Inc.)
    Polycarbafil (Fiberfil Division, Dart Industries Inc.)
    1900 Ultrahigh Molecular Weight Polymer ( Hercules, Inc.)
    Pro-Fax ( Hercules Inc.)
    Profil (Fiberfil Division, Dart Industries Inc.)
    Royalex (Uniroyal Chemical, Division of Uniroyal Inc.)
    Rynite (E. I. Du Pont de Nemours and Co)
    Ryton (Phillips Chemical Company, Plastics Technical Center)
    Teflon ( E. I. Du Pont de Nemours and co)
    Tenite (Eastman Chemical Products Inc., Plastics Division)
    Tivar (Poly-Hi/ Menasha Corp)
    Ultem (General Electric Company, Specialty Plastics Division)
    Valox (General Electric Company Specialty Plastic Division)
    Vaspel ( E. I. Du Pont de Nemours and Co.)
    Victrex ( ICI Americas)
    Vydyne ( Monsanto Company)
    Zytel ( E. I. Du Pont de Nemours and Co.)
    Fastening Site Design Considerations: Threaded Fasteners
    Fastening site Design: Self-Threading Screws
    Assembly Considerations: Self Threading Screws
    Assembly Equipment: Self Threading Service
    Troubleshooting Self Threading Screws
    Tapping in Plastics
    Reference
    Bibliography
    Typical Applications
    Machine Screw versus Special Design Screws for Plastics
    Screw Selection Affects an Automotive Assembly Line
    Failure to Check Out the Fastening Site with a Laboratory
    Effect of Different Molding Techniques
    Obtaining a Consistent Magnitude of Torque with Small Screws
    A Problem Just the Opposite of the Usual
    The Importance of Correct Boss Design
    When Screw Selection Is Not Thoroughly Tested
    A Case Study in Structural Foam and Some Famous Last Words
    Automatic Assembly Demands Close Attention to Fastener Specifications
    Bibliography
    The Fastener Laboratory
    The Need for Reliable Laboratories in the Fastening Industry
    Functions of a Fastener Laboratory
    Definitions of Terms Used
    Determining Optimum Hole Sizes
    Laboratory Equipment in Analysis of Plastics Applications
    Laboratory Study Examples
    References
    Power Screwdriving Equipment
    Selection of the Driver Tool
    Explanation of "Soft" and "Hard" Draw, Slam or Pull-Up
    Screwdriver Configuration
    Electric or Pneumatic Drivers?
    Driving Methods for Air-Powered Portable Screwdrivers
    Making the Choice of Type of Screwdriver
    Operating Speeds
    Accuracy
    Torque Level Ranges
    Torque Control and Size Selection in Plastic Applications
    Manufacturers ( Portable, Air Powered Screwdrivers)
    A Word About Fastener Pick-Up Methods
    Bench Model Automatic Screwdrivers
    References
    Bibliography
    Inserts and Insertion Methods
    Insert Categories
    In-Place Molded Inserts
    Expansion Inserts
    Cap Nuts
    Helically Coiled Wire Thread Inserts
    Ultrasonic Insertion
    Summary: Insert for Frequent Disassembly Usage and Push-In Fasteners
    References
    Bibliography
    Appendix 1 Tradenames and Manufacturers
    Appendix 2 Some Questions to Ask About Fastener Application In Plastics
    Appendix 3 Summary: Fastener Recomendations
    index

    Biography

    Brayton Lincoln was a Marketing Consultant in South Dartmoor, Massachusetts. His accomplishments in the fastener industry span over 13 years.