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Plastic Injection Mold Design Advanced

Take your understanding of the inner workings of injection molds to the next level. With a focus on cost savings throughout, work on mini-projects at each important juncture in order to master advanced concepts.

This course can be applied to the following certificates:
Elastomer Technology Certificate
Plastics Technology Certificate

Who Should Attend

Mold designers, tooling engineers and toolmakers, product designers, buyers, molders and managers.

Benefits and Learning Outcomes

  • Understand advanced parting line, shut-off development, advanced slide and lifter design
  • Learn to do advanced cavity and core inserting
  • Analyze your current issues regarding the subject matter

Course Outline/Topics

Introduction and Overview

  • Course objectives

Molding Surface Tolerances

  • The various fits in a typical mold
  • The tolerances that should be maintained
  • How the product tolerances affect tool tolerances
  • How it affects mold cost

Mold Strength and Performance

  • Understanding the forces acting against a mold
  • Various calculations
  • Designing for strength and longevity

Mold Alignment and Interlocking

  • Various methods of insuring mold alignment
  • Balancing of forces in a mold
  • Core shift causes and fixes
  • How it affects mold longevity

Advanced Parting Line and Shut-off Development

  • A detailed look at shut-off designs
  • Contoured and stepped parting lines
  • Common product design errors that complicate parting lines
  • Examples of complex parting lines

Advanced Slide and Lifter Design

  • When to use a lifter instead of a slide
  • Methods of slide actuation
  • A look at the forces involved
  • Proper heel block and gib design
  • The use of springs with slides
  • How and when to delay slides
  • Dual action slides
  • Designing slides for low maintenance
  • Determining slide travel
  • Alternate methods of molding undercuts
  • Collapsible and expandable cores

Advanced Cavity and Core Inserting

  • A thorough look at every aspect of inserting
  • Criteria for deciding whether or not to insert
  • Pins and other round inserts
  • Inserting slides and lifters
  • Laminated and gate inserts
  • The economics of inserting
  • Assembling of inserts
  • Quick change inserts

Mold Monitoring

  • Pressure transducers
  • Thermocouples
  • Proximity and limit switches
  • Vision systems


Completion of Plastic Injection Mold Design Basics or a solid knowledge of the subject matter.

Dates and locations to be announced.


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