Injection Wax Trouble Shooting Guide

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Problem Remedies

Wax Pattern Sticky-Pattern Distortion

  • Reduce Wax Temperature
  • Increase Pattern Dwell Time

Pattern Flashing/Fins Mild Overfills

  • Reduce Wax Temperature
  • Clean Mold Vents, Increase Size & Quantity of Vents
  • Reduce Air Pressure
  • Hold Mold Firmly/Keep Locks Aligned
  • Allow Mold to Cool

Excessive Pattern Shrinkage

  • Reduce Wax Temperature
  • Use a Low Shrink/Low Sink Wax
  • Use Warmer Mold
  • Increase Pattern Dwell Time
  • Increase Air Pressure
  • Increase Sprue Size

Sink Area on Large or Heavy Patterns

  • Reduce Wax Temperature
  • Use a Low Shrink/Low Sink Wax
  • Increase Pattern Dwell Time
  • Increase Air Pressure
  • Increase Sprue Size

Air Bubbles in Pattern

  • Reduce Wax Temperature
  • Increase Wax Temperature
  • Reduce Air Pressure
  • Make Sure Wax Pot is Full
  • Minimize Trapped Air in Wax
  • Fit Mold Properly & Securely Onto Injection Nozzle

No Mold Fill or Partial Mold Fill

  • Increase Wax Temperature
  • Use Warmer Mold
  • Clean Mold Vents, Increase Size & Quantity of Vents
  • Increase Air Pressure
  • Increase Sprue Size
  • Reduce Mold Release Spray/Do Not Use Talc
  • Use More Fluid Wax to Fill Thin Sections
  • Make Sure Injection Nozzle is Not Clogged
  • Do Not Hold Mold too Tightly

Ripples on Pattern Surface

  • Increase Wax Temperature
  • Use Warmer Mold

Cracking/Brittle Wax Patterns

  • Use a More Flexible/Ductile Wax
  • Reduce Pattern Dwell Time

Roughness on Pattern Surface

  • Use a Smoother, More Polished Master
  • Reduce Mold Release Spray/Do Not Use Talc