HOT RUNNERS | TECHNOLOGY
the deadlines were met. While Synventive devel- oped the 16-cavity hot runner system for the small medical components under this extreme time pressure, it also implemented the 16-cavity hot runner system as a hot-half concept for OKE. The OKE Group is supplying the health sector and general population with these masks. For valve gate applications in which multiple nozzles have to be positioned in the most confined space and need to be opened and closed simulta- neously, Incoe has developed the new pneumatic MultiPin valve gate actuator in two sizes and included them in its range of products. Based on the PE pneumatic units and designed for the (Slim) DF 5 and (Slim) DF 8 nozzle series, the MultiPin actuators support the interconnection of up to four valve gate nozzles with cylindrical valve pin tip (ZTT). The company says that a highlight of this development is the new quick coupling, which has been developed for easier maintenance and assembly. With a single set screw, all valve pins can be reliably locked or released at the same time in the easiest way possible so that the actuator housing, for example, can be dismantled without having to remove the valve pins from the nozzles.
In addition to simple and reliable handling for mould makers and fitters, Incoe adds that the emphasis in developing MultiPin actuators was on integrating a standardised product in its portfolio to allow the designer to implement multiple valve gate nozzles without having to resort to custom solutions involving special components. The standardised adapter plates for the MultiPin actuators can accept 2, 3 or 4 gate valves, and a pin stroke of 6.5mm or 8.5mm is possible. Depending on size, nozzle series and the number of attached valve gate nozzles, pitch dimensions between the nozzles of 25-63 mm can be implemented. The new MultiPin actuator is directly mounted on the manifold supporting the ready-to-go concept where all necessary components are attached to the hot runner system. Due to the special design of the connecting elements between manifold and actuator, no additional cooling is needed. Incoe has also developed a new electric valve
gate cylinder, which moves the valve pin directly, and in so doing sits on the manifold. The company says that it is as compact and easy to maintain as conventional hydraulic cylinders. The electric direct drive for valve gate systems is just as compact as a
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