Volume 10, Number 1



When CWF Hamilton in Christchurch, New Zealand set out to convert their large waterjet component weldments to investment cast parts they turned to the industry proven FlashFire Dewax System. CWF Hamilton set up a brand new state of the art investment casting foundry. They wanted to have the latest technologies available and that’s what they got! While improving product quality and increasing production quantities they found that the “New Generation” FlashFire Dewax System also improved their overall process by dewaxing and burning out the shells at the same time. The system is designed as a dual purpose furnace - FlashFire Dewaxing and pre-heating of the shells for pouring. This eliminated the need to purchase additional furnaces for production and will save both time and money.


With the improved process control, they also reduced shell cracking and the need for shell patching. CWF Hamilton and Hamilton Jet are the inventors and industry leaders in the waterjet propulsion
systems for large commercial ships and boats as well as small personal boats. CWF Hamilton is very pleased with their new Pacific Kiln FlashFire Dewax System. Congratulations on making the
right choice and a smart investment.


Recent Installations

  • Casting Technology International, Sheffield, England – “New Generation” FlashFire Dewax System
  • CWF Hamilton & Co., Ltd., Christchurch, New Zealand – “New Generation” FlashFire Dewax System
  • Middle Tennessee State University – “Standard” Wax Burnout Furnace
  • Nalco Co. – “Economy Slurry Mixer”
  • Grossmont College – Fluidized Bed Sander
  • PCC Airfoils, Minerva, OH – “New Generation” Car Bottom Wax Burnout Furnace
  • Avalon Precision Castings – “New Generation Wax Burnout Furnace
  • California State University, Fresno – “Deluxe” Slurry Mixer
  • Boise State University – “Deluxe” Slurry Mixer
  • Fort Hays State University – “Economy” Slurry Mixer
  • NSCAD Port Campus, Halifax, Nova Scotia, Canada – “Deluxe” Slurry Mixer
  • Galco International – (2) “Economy” Slurry Mixers
  • Thermocouple USA, Inc. – 4” Power Burner Assembly and Controls – Aircraft Thermocouple Testing Unit

New Orders

  • UBA, Islamabad, Pakistan – “Elevator” FlashFire Dewax System
  • Deloro Stellite, Belleville, ON Canada – “Standard” FlashFire Dewax System
  • Securitech Group,Inc.– Barrel Rain Sander,(2) Fluidized Bed Sanders
  • Perm Motor Company, Perm Russia – “New Generation” Double Door Shuttle Car Wax Burnout Furnace
  • Symmetry Medical, Sheffield, UK – (2) Afterburner Upgrades

ThermoFlo Pusher Tiles New Orders

  • Hitchiner Mfg.Co. – New Hampshire
  • Hitchiner Mfg.Co. – Mexico
  • PCC, Douglas Georgia
  • Signicast, Hartford,Wisconsin
  • PCC, Minerva, Ohio

Foundry Facts


Our furnace afterburner system worked fine when we got it, years ago. But as time went on we were continually increasing the size of our molds, and we have smoke problems now. Why doesn’t the afterburner burn up all the smoke anymore and what can we do about it?


Smoke Gets in My Eyes

Dear Smokey,
This is a common problem in the Investment Casting Industry. As technology develops to cast larger and larger parts, the capacity of the equipment is no longer adequate. Furnaces are no different, particularly the afterburner.Originally, the afterburner was designed for a specific category of burnout capacity. This is specified in terms of pounds of wax per load. While there is a significant safety margin built in, eventually the larger molds and their increased wax will exceed the original specified capacity of the afterburner.


Fortunately, there is a fix. Based on your current operating wax load, we are able to calculate a retrofit upgrade that will once again eliminate your emissions and put you back in air quality compliance. This is usually a combination of burner, blower and stack upgrade. It is normally something that can be installed by your personnel and requires no change to the original furnace structure.


Don’t get caught with smoke in your eyes. It’s an easy fix to stay compliant.


The Pyro Maniac