Fakuma 2026 Flow diverters support uniform mould temperature control

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Nonnenmann GmbH

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Uniform flow cross-sections help maintain effective mould temperature control. Nonnenmann’s ULE flow diverters extend this principle to riser bores, supporting consistent flow in areas such as cores and ribs. Two versions accommodate 4 mm and 6 mm temperature-control channels.

Temperature-control flow diverters ensure uniform flow cross-sections for efficient and effective mould temperature control. As a supplier of components for toolmaking, mould making and injection moulding, Nonnenmann, based in Winterbach, Baden-Württemberg, offers complete solutions from standard ejector pins to custom parts manufactured to customers’ design specifications, all from a single source. Another specialist area within its broad portfolio is injection moulding equipment and accessories. This includes a wide range of temperature-control components, such as couplings, hoses and other accessories. Nonnenmann also provides innovative solutions to improve efficiency, effectiveness, process reliability and process optimisation.

To optimise temperature control within the mould, the company offers temperature-control flow diverters (ULE). These are used in riser bores, for example in bosses, cores, ribs or compartment structures, and represent a further development of conventional riser-bore temperature control using baffle plates.

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The advantage of the ULE flow diverters is that they maintain a constant cross-sectional area throughout the mould’s temperature-control channels. This ensures uniform flow and thus optimal temperature control in these areas. Inadequately designed mould temperature control results in poor moulded-part quality and longer injection moulding cycle times.

Temperature-control channels should have a circular cross-section throughout and be connected to ensure forced circulation. Depending on the diameter and length of the temperature-control circuit, this can produce turbulent flow, which is considered particularly effective and should therefore always be the aim.

Mould wear is also reduced, contributing to more reliable production and high moulded-part quality.

Changes in diameter along the temperature-control circuit should be avoided wherever possible, as these sections can easily become clogged during operation, cause high pressure losses and prevent turbulent flow.

“Flow only ever uses the circular cross-section. Our temperature-control flow diverters ensure a uniform flow cross-section throughout the temperature-control circuit, giving the riser bores the same diameter as the remaining temperature-control channels,” explains Technical Director Danny Dispan, outlining the benefits of the standard component.

The ULE flow diverters are available in two versions: ULE Ø4 (item no. HN00170) for 4 mm temperature-control channels and ULE Ø6 (item no. HN00171) for 6 mm temperature-control channels. Manufactured from grade 1.4301 stainless steel, the components are suitable for all mould surface temperatures. They are available from stock as standard components in a length of 250 mm and are cut to the required installation length by the customer. The diverters have an outside diameter of 8 mm or 10 mm, manufactured to an h9 tolerance. The company provides guidance on the required installation space within the mould.

Visitors can learn more about these products, alongside other new products and highlights for the plastics industry, at Nonnenmann’s stand at Fakuma 2026 (Hall 1, A1-1101). Beyond the trade fair, the supplier also offers personal consultations at its own showroom or through on-site visits by its field sales team. These dedicated appointments provide an opportunity to discuss and explore the full portfolio first-hand.

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