Revised Hydraulic Presses Compete with Electrics

The FN series of fully hydraulic horizontal molding machines from Nissei America Inc., Anaheim, Calif., has been revamped to make them more competitive with all-electric machines.

The FN series of fully hydraulic horizontal molding machines from Nissei America Inc., Anaheim, Calif., has been revamped to make them more competitive with all-electric machines. The eight models from 89 to 501 tons boast energy savings of about 30% vs. conventional machines due to reduced pressure losses in hydraulic circuits and decreased sliding resistance of mechanical components. The new TACT controller has a scan time of 500 microsec, twice as fast as a conventional machine.

 
The new screw design features five zones of temperature control, versus four zones previously. A pressure sensor has been added to detect mold clamping force in order to optimize clamp-up time and allow very low-pressure clamping. In addition, the system reportedly attains better control of mold opening at very low speeds (less than 30 mm/sec).