Incoe Slim nozzles for compact precision gating in multi-cavity moulds

Nozzles – Hot runner manufacturer Incoe will present its new Slim-Flo nozzle concept at Plast Milan.

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Incoe says the main element of this concept, which primarily targets multi-cavity applications, is the new SBH heater (Slim Base Heater), which has been applied to the company's Slim DF 5 nozzle.

With SBH, the outer diameter of the DF 5 has been reduced by almost 25% to enable thermal control over the length of the nozzle to be further optimised, according to the company. The smaller outer diameter reduces the minimum distance between two nozzles from 22 mm to 18 mm, which can even be reduced to 16 mm, by adapting the nozzle shank. This slimming solution enables the nozzles to be tightly screwed to the manifold, which then creates a pre-assembled all-in-one system.

The system is now ready for operation and injects into injection points located close to each other. As such, the screwed-in nozzles are set with minimal cavity distances, which fulfils a major condition for efficient injection moulding in multi-cavity moulds.

This concept has been successfully used in many multi-cavity applications, Incoe says. And, this is why the company will now apply the same concept to its DF 8 nozzle series – a prototype system with Slim DF 8 nozzles was showcased in Milan.

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Slim-Flo is part of Incoe's modular Direct-Flo hot runner programme, which is based on the company's Seal-Fit concept (the nozzles are screwed to the manifold). Seal-Fit, Incoe notes, is an important basic principle of its Direct-Flo hot runner programme and has numerous advantages: A nozzle holding plate is no longer required to support nozzle heads or for pressing the nozzles, nor to support and stiffen elements to avoid platen deflection. This in turn saves costs. Operating costs is also lower as there are no contact surfaces in the workpiece in the transition area between the nozzle and the manifold, which ensures no heat loss.

Furthermore, the positive connection offers high operational safety – there is no risk of leakage between the nozzles and the manifold, which sometimes occurs as a result of a reduction in the contact pressure between the mould plates, bolt connections and supporting elements.

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