Pneumatic Tires – Tire Defects

The Pneumatic Tires: Tire Defects course is designed to provide learners in the tire industry, including original equipment manufacturers (OEMs), salespeople, distributers, suppliers, and tire service personnel, and any other interested individuals with a basic understanding of pneumatic tire defects. Through helpful animations and interactives, learners are introduced the manufacturing defects and the operational and functional defects that affect tires after sales.


Learning Objectives

  • Understand the different manufacturing defects and how they can occur.
  • Identify the various types of defects that occur during manufacturing.
  • Recognize the potential factors that may cause operating and functional defects to occur.
  • Describe the differences between each type of operating and functional defect.
Course Length: 2 HRS

Table of Contents

Pneumatic Tire Manufacturing Defects

  • Inadequate Design
  • Inadequate Control of Humidity
  • Inadequate Preparation of the Tread Undersurface
  • Dryness or Less than Required Tackiness of Components
  • Wetness or More than Required Tackiness of Components
  • Inadequate Venting of Evaporable Solvents
  • Inadequate and Uneven Cure Inputs
  • Air Entrapment between Plies and Belts
  • Uneven Cutting of Ply Edges
  • Uneven Calendering
  • Uneven Frictioning
  • Improper Application of Release Agents
    • Inside Surface of Tire
    • Outside Surface of Tire
    • Tire Mold
  • Inner Liner Damages during Tire Building and Curing
  • Poor Splicing of Joints during Production
  • Unskilled and Poor Inspection
  • Careless Workmanship
  • Improper Equipment
  • Poor Equipment Maintenance
  • Uneven Heating or Cooling of Tools
  • Tire Mold and Curing Defects
    • Misaligned Molds
    • Molds with Blocked Spew Venting Holes
    • Dirty Molds
    • Damaged or Malfunctioning Bladders
    • Undercure
    • Failed or Inadequate Post Cure Inflation
  • Contamination
  • Liner Markings on Plies
  • Use of Substandard Raw Materials Due to Cost Compulsions
  • Use of Over-Aged Components
  • Improper Process Control
  • Uncontrolled Use of Rework Materials

Operating and Functional Defects

  • Road-Related Factors
  • Tire-Related Factors
  • Installation-Related Factors
  • Tube-Related Factors
  • Flap-Related Factors
  • Valve-Related Factors
  • Rim and Wheel Related Factors
  • Vehicle-Related Factors
  • Drive Factors
  • Miscellaneous Factors

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