If you’re looking for additional areas of your process in which to save energy, consider your robot vacuum grippers. Piab USA Inc., Hingham, Mass., has introduced unique, patented technology that’s said to save 30% to 55% of the energy used to draw vacuum on robot suction grippers. It’s also quieter and draws vacuum faster, which could nudge the speed dial on fast-cycle molding.
Piab’s new piInline series of vacuum ejectors (or generators) are said to be much more effi cient than standard single-stage inline vacuum ejectors. They use the same venturi principle, but draw three times as much vacuum per cfm of compressed-air input. The new ejectors can be easily retrofitted and do not add weight or cost compared with standard ejectors. Depending on cycle time and usage, they reportedly could pay for themselves in a week.
The new ejector cartridges come in three versions. There is a standard Xi model, which draws around 95% final vacuum on smooth parts such as plastics. The Si model is for porous or rough-surfaced products where vacuum leakage is a factor. This version draws large flows at low and medium vacuum levels. A unique alternative is the third version, Pi (or Bi in the smallest models), which draws the same high vacuum level as the standard Xi model but does so with very low compressed-air feed pressure—just 40 psi, vs. the usual 90 psi. Not only does this save energy, but it is advantageous for plants where the central compressed-air supply pressure varies according to demand. Such fluctuations, which can bring the risk of dropped parts or require slower cycles, may be avoided by setting the central pump for the lower feed pressure.
(781) 337-7309 • piab.com
PIAB Vacuum Products
65 Sharp St Hingham, MA 02043
Phone (781) 337-7309 Fax (781) 337-6864