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).