Visit for information about spring 2021.


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 Plastics Technology Certificate.


John Vosmeier

John has worked as a Design Manager, Senior Tooling Engineer, Senior Mold Designer and is currently the Tooling Manager for a consumer products company purchasing molds in the U.S. and worldwide. He has worked with Custom and Proprietary molders over ... read more

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.

Meet Instructor John Vosmeier

Date: Thu-Fri, Apr 22-23, 2021

Delivery Method: Live Online

Time: 8am-4:30pm CT

Platform: Zoom

Instructor: John Vosmeier


$1,090 by Feb 22, 2021
$1,190 after Feb 22, 2021

CEUs: 1.4, PDHs: 14

Enrollment Limit: 40

Program Number: 4830-13346

Registration Deadline: Apr 19, 2021

Register Now