Die casting is a metal casting process where molten metal is forced under high pressure into a mold cavity which has been machined into the desired shape. Most die casting is limited to low melting point, non-ferrous metals; specifically zinc, copper, aluminum, magnesium, lead, pewter and tin-based alloys. Once the die cavity has been filled with the molten metal, coolant (usually water) is circulated around the die to cool the part. After cooling, the die halves are separated and the finished part is ejected.
At the beginning of the die casting sequence, lubricant is sprayed onto the die cavities, the mechanical plunger and the die guide bars. Due to the elevated temperature of the dies, some of the die lubricant evaporates which creates a plume of mists and fumes.
Some of the key benefits from filtering the mist, fumes and smoke generated by die casting processes include:
- Protecting worker health
- Reduced exhaust air make-up requirements up to 80% through recirculated conditioned air
- Extended machine life
- Reduced operational costs through reclamation of lubricants
- Improved part and product quality
- Reduced housekeeping costs
- Compliance with even the strictest federal, state and local environmental standards