You had to listen very closely to learn the big news from Dima Inc. at NPE 2003 - the VI injection press runs as soft as a whisper, yet it's not an all-electric.
Dima demonstrated in-mold decorating on a hydraulic, 120-ton VI. ``This is the quietest machine in the world,'' said Phillip Kim, chief executive officer.
The VI stands for vector inverter, a direct-current drive that runs the hydraulic pump motor only when power is needed. VI presses offer energy savings and quiet running, at a lower price than all-electric presses, Kim said.
VI presses are available in clamping forces from 80-650 tons.
Dima Inc. of Paramount, Calif., is the U.S. subsidiary of Dongshin Hydraulics Co. Ltd. of Pusan, South Korea. Kim said Dongshin has sold 500 VI's in South Korea, but just now is introducing them to the U.S. market.
In thermoset molding machine news, Dima introduced a two-platen toggle press called the HyToggle, available with 270-650 tons of clamping force, with shot sizes up to 100 ounces. The toggle clamp first closes the platens, then four hydraulic pancake cylinders lock the mold halves in place. The machine gives superior repeatability and flatter part surfaces, and protects against mold damage, according to Dima.
The company also showed a new, wide platen on its TF-brand toggle presses. Kim said the company has increased the TF's injection speed to 200 millimeters per second.
Dima is known in the U.S. market for injection presses, but the company has started to sell its South Korea-made injection blow molding presses in the states, too. Kim said the machine competes with Jomar Corp.'s IB 65 machine.