Oerlikon HRSflow has introduced the new TECHflow HRS, a hot runner line specifically designed for technical polymers and electronic applications.

The TECHflow HRS features innovative solutions such as new external valve gate end rings for the Tp and Vp nozzle series, as well as the Through The Cavity (TTC) end ring for Tp nozzles. What they have in common is their increased wear resistance for processing reinforced thermoplastics and the possibility of restarting at comparatively low temperatures.

Thanks to the increased wear and corrosion resistance of the new end rings, they can withstand the processing of materials such as:

• PA6/PA66
• PBT
• POM
• PPA
• PPS

which are filled with carbon or glass fibres to increase their mechanical properties. These abrasive reinforcing materials would lead to premature wear of conventional end rings. In contrast, the new solutions designed for the MULTIflow HRS® line offer a more durable alternative and an extended service life for the hot runner components thanks to the choice of particularly resistant materials.

External valve gate end rings

Due to the robust design of the new external end rings for Oerlikon HRSflow's Tp/Vp nozzle series, significantly lower melt temperatures are sufficient to restart processes after shutdowns or interruptions. This reduces the risk of thermal degradation of temperature-sensitive materials, including the release of corrosive gases when processing flame-retardant materials. The smaller injection point due to the reduced diameter of these end rings also provides greater flexibility and precision during the injection process for uniform filling of the cavities – ideal for applications that require good mechanical properties combined with high optical quality at the injection point.

TTC valve gate end rings

The special geometry of the new TTC end ring for the Tp nozzle series also ensures a wide processing window and a uniform temperature near the gate for a good restart at low temperatures to prevent material degradation. The 4 mm reduction in bushing diameter increases flexibility in positioning the injection point and simplifies production and maintenance. The result is shorter set-up times and lower labor costs while increasing overall productivity.

Technical applications live at Fakuma 2024

At Fakuma 2024, Oerlikon HRSflow showcased its TECHflow HRS line specifically designed for technical polymers and electronic applications. At Haitian (hall A1, stand A1-1103), a Zhafir Zeres Series 1500V electric injection moulding machine produced PA6.6-GF30 cable clippers weighing just 1.2 g in a 16-cavity mould. The machine was equipped with a real-time monitor that visualizes the filling behaviour. The dryer, material feed and temperature control unit, all three also from Haitian, are integrated into the control system. The hot runner configuration consists of 16 nozzles from the Oerlikon HRSflow Sa series with an open gating system. Specially developed for processing glass fibre reinforced plastics, the TECHflow HRS line ensures perfect cavity filling and outstanding process repeatability.