HOT RUNNERS | TECHNOLOGY
At Fakuma, Oerlikon HRSflow showcased the new S series in a healthcare application. This hydration reminder device made of PP attaches to bottles or glasses to remind the user by signal to drink regularly. The S series made it possible to meet the requirements for a low part weight with a wall thickness of only 1 mm as well as for quick colour changes, says the company. HRScool Evo is a further development of the HRScool hydraulic cylinder system for hot runner injection moulding, which does not require active liquid cooling of the actuation unit. Thanks to a further reduction in the heat flow between the hot runner and the mould plate, HRScool Evo version can now be used at higher mould temperatures than its predecessor system HRScool, which was launched in 2019. Oerlikon HRSflow says it has optimised the heat balance of the cylinder. As a result, the technology, which is mainly used in the production of interior and exterior automotive parts, is now also available for previously temperature-critical applications. Despite the significantly improved heat transfer, HRScool Evo – in both the basic and the damped version – fits into the mould cut-outs of the fully
Left: Typical applications of Oerlikon HRSflow’s new S series hot runner line include small technical parts such as the housing for a smart device called Hydra- tion Reminder (right)
compatible hot runner systems of the P, M, G and A series from Oerlikon HRSflow. HRSCool Evo reduces the heat transfer from the manifold heaters to the oil of the actuator thanks to the geometry optimisation of the contact elements between manifold and cylinder. In contrast, the highly efficient heat dissipation to the cold clamp- ing platen takes place via a cover whose large, flat surface is made of a material with very high thermal conductivity that works as thermal bridge. An
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IMAGE: OERLIKON HRSFLOW
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