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Injection Molding Principles - March 2015

1. Overview of the Injection Molding Cycle

  • The injection unit
  • The clamp
  • The mold

2. Injection Control

  • The feedback loop
  • Charting pressure and velocity
  • Utilizing velocity-controlled filling
  • Pressure limited velocity

3. Plastics Flow During Injection Molding

  • The worm analogy
  • Laminar flow and fountain flow
  • Effects of temperature, pressure, and molecular weight

4. Shrinkage and Volume Changes

Injection Molding Principles - May 2015

1. Overview of the Injection Molding Cycle

  • The injection unit
  • The clamp
  • The mold

2. Injection Control

  • The feedback loop
  • Charting pressure and velocity
  • Utilizing velocity-controlled filling
  • Pressure limited velocity

3. Plastics Flow During Injection Molding

  • The worm analogy
  • Laminar flow and fountain flow
  • Effects of temperature, pressure, and molecular weight

4. Shrinkage and Volume Changes

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