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Injection molding: New motors, faster control give IMM more speed and precision

The Milacron/Fanuc Roboshot Si-B injection molding machine combines new servo technology, 10X faster control updates, a reduced-inertia injection unit and new AI for even greater consistency and easie...


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March 1, 2003 by Canadian Plastics

The Milacron/Fanuc Roboshot Si-B injection molding machine combines new servo technology, 10X faster control updates, a reduced-inertia injection unit and new AI for even greater consistency and easier operation — all at a reduced price.

The machine achieves injection acceleration times of 27 ms, for 0 to 300 mm/s. The Si-B series’ performance is well suited for molding thin-wall and precision parts, such as electronic connectors and cell-phone components. Reduced cycle time — thanks to overlapped functions and artificial intelligence (AI) control for mold/ejector protection and metering/injection — make the Si-B ideal for high-production, “lights out” molding of medical devices, gears and packaging products.

Si-B machines use Fanuc’s newest Alpha series servo motors and drives, which have reduced inertia and faster response than previous generations. Matched with a 10X faster control (0.1 msec. updates) and noise-immune fiber-optic communications, the drive system allows Si-B machines to offer the fastest acceleration of any all-electric IMM on the market — but with a new level of precision that reduces injection-pressure transfer variations by 50% or more.

The new AI metering function “learns” an ideal recovery cycle, and then modulates screw RPM to achieve repeatability of 0.2 sec or less on every cycle. Used in conjunction with AI pressure profile control, part weight variance is nearly eliminated, even when using regrind blends. Both standard AI pressure profile and metering can be tuned by the operator, and profiles can be transferred from one Roboshot machine to another to duplicate molding performance.

Ferromatik Milacron North America 905-319-1919 ex. 304