Melt Treatment for Investment Casting

Melt Treatment for Investment Casting

FDU degassing units are an automated metal treatment system for the environmentally-friendly degassing and cleaning of aluminium and copper alloys.

FDU units use the impeller principle with a patented rotor which creates fine inert gas bubbles and mixes them with the melt. These fine bubbles are distributed homogenously throughout the melt without disturbing the surface maximising the contact area between the gas and the melt. The effectiveness of the Foseco FDU means that higher levels of degassing and cleaning can be achieved and treatment times can be reduced.

By using the MTS System (Metal Treatment Station) aluminium melts can be completely and automatically treated in one step. Whilst degassing with the proven FDU technology, all required treatment agents can be added at pre-set levels.

The XSR rotor type can be used in combination with all Foseco graphite shafts. Turbo cuts in the upper section of the rotor further reduce the size of the inert gas bubbles thus maximizing the surface area of the bubbles for a given volume of treatment gas, resulting in fast and consistent hydrogen removal. XSR rotors are supplied in the impregnated condition to reduce oxidization and extend service life.

Foseco offers a broad range of chemical products for the treatment and refinement of aluminium and other non-ferrous alloys including:

  • Fluxes for Drossing, Covering and Cleaning Aluminium Alloys
  • Grain Refiners for Aluminium Alloys
  • Modifiers for Aluminium Alloys
  • Fluxes for cleaning, remelting and element removal of copper base alloys

"Prior to our relationship with Weaver Materiel, we were purchasing riser sleeves direct from the OEM. As a stocking distributor, Weaver typically is able to deliver same or next day. OEM lead times averaged three to four weeks. With Weaver, I've been able to reduce my working inventory by about 40%."

- JD Schmidt, QA Manager, Ohio Ferrous Foundry

“Ashland Foundry & Machine Works and Weatherly Casting are grateful for the partnership in our working relationship with Weaver Materials.  Weaver has helped us maintain pricing and avoid increases in a volatile market.  Weaver has always kept us in supply of material when markets dictated shortages/allocation status.  If Weaver was not in our vendor pool daily production ability would have been negatively impacted.  Weaver is also technically able to review our foundry processes and make suggestions to either achieve a cost savings or process improvement.  I am looking forward to a continued collaboration between the Weaver team and my locations.”
- Chrissy C