Starting to receive orders for electric ultra high-speed molding machine
Nissei Plastic Industrial Co., Ltd. has produced an electric ultra high-speed molding machine, "ES200H," with a mold clamping force of 20 tons (196 kN), which materializes ultra high-speed molding on order of 0.6 second. Orders for the machine will be accepted on a regular basis after the machine is exhibited at "Plastic Industrial Fair 2000 Nagoya" on November 11. The molding machine molds connectors and other very fine parts at an ultra high-speed on order of 0.6 second. The machine can make two liquid crystal polymer connectors simultaneously at a rate of 0.68 second. To materialize ultra high-speed molding in less than 1 second by an electric molding machine, it is important to permit high-speed plasticizing/kneading and compound action during molding processes. In this molding machine, an originally developed driving servomotor is directly coupled with the ball screw to supply driving power to the injection mechanism and mold clamping mechanism, respectively. This center drive system permits quick response of both injection and mold clamping mechanisms, high-speed plasticizing/kneading and injection, and compound action during processes. The injection mechanism is equipped with a special screw, which is designed and surface-treated for engineering plastic resin for ultra high-speed molding, and a new heating cylinder temperature control system in order to stabilize the plasticizing/kneading process by means of precision injection pressure control and back pressure control. In this way, ultra high-speed molding has been materialized thanks to (1) 350 mm/sec injection speed and 15 ms injection response speed, (2) simultaneous actions such as injection during mold clamping, mold opening/closing during metering, ejection during mold opening, and ejector backward during mold clamping, (3) high-speed movement of the mold open/close cross head, and (4) faster ejection speed. Furthermore, the covers of the injection mechanism and mold clamping mechanism are reinforced to prevent noise and vibration due to high-speed operation.
|
|