Injection Molding: A Short Course


Course Number: PLSM.7170

Tuition: $1,850

  • March 8-10
    Dr. Anne Soucy
  • Registration for this seminar has closed.

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This seminar* is designed for those who are interested in an introductory course about the injection molding process. Topics include material behavior, the major components of the machine and the mold, part design, the steps of an injection molding cycle, a method to establish a reliable process, and ways to troubleshoot common molding defects. Time will be spent in the laboratory disassembling/assembling different types of molds, installing a mold (including the clamp setup), and establishing and troubleshooting a molding cycle.



  • Polymer classifications
  • Viscosity
  • Effects of heating and cooling
  • Flow characteristics
  • Hygroscopic materials
  • Orientation


  • Components
  • Types: 2 plate, 3 plate, stack
  • Runner design: cold runner, hot runner, insulated runner, artificially balanced, naturally balanced
  • Cooling
  • Ejection
  • Venting

Part Design

  • Wall thickness
  • Radii
  • Draft angle
  • Gate location


  • Injection unit: screw and barrel components and important set points
  • Clamp unit: types, components and important set points
  • Safety

Process Setup

  • Cycle sequence: plastication, injection, pack and hold, cooling
  • Process setup: scientific and decoupled molding approaches
  • Clamp setup


  • Common defects: Flash, short shots, jetting, sinks and voids, burn marks/air traps, non-uniform fill, weld lines, gate blush, splay, warpage
*This 3-day Injection Molding course taught by Anne Soucy is similar to the 5-day Injection Molding seminar that has historically been offered by Stephen Johnston.