CHICAGO—Toshiba Machine Co. (Booth S1647) is demonstrating five injection molding machines, including presses showing digital versatile disc molding and low-pressure textile molding. The exhibit also includes high-speed/high-pressure molding, and a prototype showing new features on Toshiba's ISG Series of machines — such as a new hydraulic system, more tie-bar spacing, bigger platens, a longer stroke and an increased ejector stroke.
Toshiba is molding polycarbonate DVDs on an IS40HD press, running a cycle of just under four seconds.
The IS40HD has an exclusive ``moment free'' mechanism that maintains equilibrium between the clamping force and injection pressures.
A servo valve provides high-speed molding opening and closing, plus injection control. The machine also has a specially designed plasticizing device created for DVD molding.
In textile molding, Toshiba has developed a fabric insert molding system for horizontal-clamp presses.
A major application is automotive door trim, where injection molding eliminates the need for gluing. Low-pressure molding is used.
Toshiba also is showing its expanded line of ISG machines, and a prototype ISG with several improvements. The company is demonstrating four ISGs:
An ISG90 press showing high-speed molding of a small polystyrene dish at less than a four-second cycle.
An ISG310 machine doing high-pressure molding of a thin-wall polycarbonate laptop computer housing.
An ISGS610 running a 16-cavity stack mold delicatessen cup on a 7-second cycle.
A prototype press, the ISGN150, molding a connector from polybutylene terephthalate connector on a four cavity mold.
The ISG machines were introduced two years ago, initially with clamping forces from 310-950 tons.
Toshiba has taken the series smaller, with new machines from 90-250 tons.