Aoki Technical Laboratory Inc. said its new one-step injection stretch blow molding machine cuts cycle time by 30 percent from the earlier model.
More-efficient movement of injection mold halves is the key to the cycle-time reductions for the SB III-250LL-50S, Aoki said. In the earlier model, the SB III-250LL-50, the upper half of the mold closes first, and then the lower half moves up to close the mold, with the process reversing when the mold opens. In the new model, both mold halves move simultaneously, saving time.
The improved press also uses a tilting plate actuator to run at higher speeds. Another feature: a synchronized circuit using a rack-and-pinion mechanism to open and close molds during the blow molding cycle.
A wider blow mold clamping unit enables the 50S model to run a more-diverse range of bottles, according to Aoki of Nagano, Japan. Changes of blow molds are easier, thanks to a new hydraulic cylinder that slides the mold out of the machine.
Another new injection stretch blow molder from Aoki, the SB III350LL-40, was designed for fast-cycle molding of narrow-neck bottles. An electric servo motor runs the turntable movement, which Aoki claims is an industry first. In addition, simultaneous mold opening and closing replaces a conventional two-step method.
Aoki´s U.S. headquarters is in Elk Grove Village, Ill.
Tel. (847) 981-6000, fax (847) 981-6105.