Reliance Specialty Products
Vapor Degreasing Experts™

Metal Injection Molding - Wax Removal

Solvent Vapor degreasing is an excellent way to remove wax from the cavities of Metal Injected Molded (MIM) parts.

Metal Injected Molding (MIM) is fast becoming an important part of manufacturing.

One of the most important aspects of metal injection molding (MIM) is "debinding" or "dewaxing" the part once molded. In the past, the debinding or dewaxing process was time consuming and somewhat tedious... but with solvent vapor degreasing, dewaxing becomes fast and easy. Solvent vapor degreasing handily takes the wax into solution and reduces debinding times from hours to minutes.

Metal injection molding uses binders (like wax additives) to hold the metal powder together during the injection molding process. The Metal Injected Molded (MIM) parts, also known as green bodies or green parts need to have the additive waxes removed prior to sintering. Sintering is the process of making (a powdered material) coalesce into a solid or porous mass by heating it. The "green bodies" are heated to harden. However, if the additive waxes are not removed prior to sintering, the entire part could "melt" or collapse in the sintering process; making a mess and causing lost production.

Benefits of Solvent Vapor Degreasing to Dewax

Enter Solvent Vapor Degreasing, which has the two-fold benefit of using solvents - that take the wax into solution and heat to create solvent vapor that penetrates deep within the green part to "pull" the wax out of the deep blind holes and other cavities that are unique to the MIM part.

The Dewaxing Process
  1. Green bodies are placed in the cleaning basket and lowered into the vapor degreaser.
  2. The MIM parts are heated while the solvent condenses around the entire part and moves into blind-holes and grooves to take the wax into solution (dissolve the wax).
  3. If needed, the MIM parts can be immersed into the boiling solvent for additional wax removal.
  4. After 5-30 minutes (depending on the amount of wax to be removed), the parts are brought to the refrigeration zone - where they are cooled and ready for sintering.
Dewaxing MIM parts, stage 1
1. Start - green body parts lined up in basket.
Dewaxing MIM parts, stage 2
2. Parts being put in solvent vapor degreaser.
Dewaxing MIM parts, stage 2b
2b. Parts being heated and exposed to solvent vapor.
Dewaxing MIM parts, stage 3
3. Parts being immersed in solvent and ultrasonics.
Dewaxing MIM parts, stage 4
4. Parts being dried in cool zone of unit.

Benefits of Working with Reliance:
Manufacturer of Solvents & Equipment

  • Comprehensive Vapor Degreasing Solution Provider - Reliance is the only industry player that manufactures both vapor degreasing solvent and vapor degreasing equipment. Our vapor degreasing equipment manufacturing expertise combined with our years of working with a variety of solvent cleaning processes make us able to support our customers in a variety of practical ways.
  • Years of experience - A unique history of developing solvents and manufacturing vapor degreasing equipment for precision aerospace, electronics and optics customers.