Four Toyo injection molding machines - every one an all-electric - graced Maruka U.S.A. Inc.'s booth at NPE 2006 in Chicago.
A new press with 400 tons of clamping force and outfitted with a Star robot molded a large polycarbonate salad bowl. The demonstration showed Toyo's fast injection speed, needed to fill a big, thin-wall part with the stiff PC material, according to Ronald Zara, national account manager. The machine is called the Toyo Si-400-J450U.
A 110-ton press, a Toyo Si-110-III-E200U, insert-molded poker chips, molding the plastic around a steel disk. A Yushin robot removed the chips and placed them on a conveyor belt.
Rockaway, N.J.-based Maruka also ran two different types of magnifying glasses on a 90-ton press, the ET-90-VR2, with both vertical clamping and vertical injection and what the company claims is one of the industry's fastest rotary tables. Zara said the table can move 180 degrees in just one second. Each magnifying glass ran on a one-cavity mold, and the machine controller handled the two different shots.
Another 90-ton vertical machine, a Toyo ET-90-HR-4, had a vertical clamp and horizontal injection.