CHICAGO (Sept. 28, 5:40 p.m. EDT) — South Korean injection press maker Jinhwa Glotech Co. Ltd. has adopted Moog Inc.'s all-electric power system for its injection units.
Moog, a developer of drives and pumps, announced the news at NPE 2006 in Chicago. The name is a mouthful: the high-power, high-speed all-electric injection system. In addition to providing more power and higher injection speed, Moog said its system extends machine life and reduces the amount of raw material used.
Jinhwa's director, Hi-Joung An, said the firm will use Moog technology on its high-speed, all-electric machines to mold thin-wall parts such as cell-phone components, including light-guide plates, keypads and battery cases.
The power system uses a nonlinear actuator and Moog's high-torque, direct-drive servomotor to drive the injection screw. That reduces overall inertia and maximizes energy efficiency, generating more power and higher speed in a shorter time, compared with traditional ball-screw/timing-belt arrangements. Injection pressure is controlled by feedback from a load cell; injection speed is controlled by feeding back the angle of the nonlinear actuators and its angular velocity.
“Moog provided a complete system from an innovative motion control design to the development of control software to supplying of major components such as servomotors, servodrives and motion controllers,” said Choonman Kim, Moog's market manager for the Asia-Pacific region.
A direct-drive servomotor is used to drive the plasticizing screw.
In new technology, Moog introduced at NPE:
* A line of direct-drive servomotors, designed for high-torque applications, including injection molding machines. Moog can customize the motors, for instance, by adapting the stator design to maximize torque at a given speed, or enlarging the hollow shaft to pass cables through or house mechanical components. Other options include alternative cooling methods and feedback devices.
* The RKP-II, or Radial Piston Pump, featuring a re-engineered powertrain designed to increase service life and reduce noise emissions. To cut down on noise, engineers boosted the number of pistons from seven to nine. The diameter of the pistons was reduced, leading to cutbacks in dynamic forces affecting the housing, and in volumetric flow and pressure pulsation.
Moog of East Aurora, N.Y., makes drives and pumps for industrial machinery manufacturers. It works with electric, hydraulic and hybrid technologies.