HOT RUNNERS & MOULDS | MACHINERY
Top tips: advances in hot runners
Recent developments in moulds and hot runners include nozzles that extend versatility, a technology for small part production and a system that makes weld lines invisible
Hot runner technology can help moulders to streamline their operations with shorter cycle times – as well as bypassing the need to collect and recycle sprues. At this year’s K show, suppliers showed off a variety of new systems. Oerlikon HRSflow says its StarGate HRS hot runner technology enables precise control of melt injection into the mould cavity using a “revolutionary” valve gate. Another development – also seen at K2025 – is Glow HRS, which allows direct injection of aesthetic parts in amorphous materials. Other systems seen at the show included: an injection moulding tool for automotive parts that delivers a “flawless surface”; the Up Nozzle series, which is engineered for compact, tight-space applications with low shot weights; and new solutions for luxury and eco-friendly parts in the beauty and personal care industry. StarGate HRS is for the injection moulding of PP,
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PE, PS and other amorphous thermoplastics. Benefits include: no need for production, assembly and maintenance of various components; reduced cycle times; easier colour changes; and lower power consumption and pressure loss. The thickness of the back plates can be reduced. The technology also enables short filling and packing times. At K2025, it was used to make a bucket by BMB, an Italian injection moulding machine manufacturer. At the booth of injection moulding manufacturer Haitian International, Oerlikon HRSflow gave a live demonstration of how the FlexFlow HRS servo- controlled needle valve technology can produce high-quality automotive parts directly in the mould. This was illustrated by making a car wheel arch. Developed with DNP Group (a producer of automotive decoration film printing) and mould maker Inevo, the project shows that painting large injection-moulded parts can be eliminated – even
Main image: Oerlikon’s hot runners can make cosmetic packaging with wall thicknesses of 12mm
November/December 2025 | INJECTION WORLD 13
IMAGE: OERLIKON HRSFLOW
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