HRScool Evo reduces energy consumption for hot runner injection molding

Hot runner specialist Oerlikon HRSflow has developed the HRScool Evo system in which the hydraulic cylinder that positions the pin does not require separate, active water cooling. In many cases, more complex water-cooled systems can thus be replaced.

As high-precision actuators, the cylinders of hot runner systems are crucial components for continuously trouble-free process control. In conventional systems, water cooling ensures that the optimum working temperature is maintained.

With HRScool Evo, a thermally insulating air gap towards the cavity reduces both the heating of the cylinder and the thermal loss of the manifold. A cover made of a highly heat-conductive material on the opposite side also ensures optimum heat dissipation towards the cold clamping platen.

For perfect matching, the height can be adjusted via telescopic supports, further enhancing heat transfer and thermal uniformity over the entire hot runner system to maximize part quality.

By eliminating water cooling and optimizing heat flow, HRScool Evo increases energy efficiency in hot runner injection molding.

Reduce energy consumption and maintenance time

Depending on the system size and application, the HRScool Evo system can reduce energy consumption at the drops by up to 10%. In addition, the low number of components reduces the assembly and maintenance time.

“Apart from energy efficiency, one of the most important advantages is the elimination of all pipes and connections required for water cooling. Where these are not present, they cannot become clogged or corroded,” explains Massimo Rossi, R&D Director at Oerlikon HRSflow. “The ability to remove the actuators while the needles remain in the hot runner system also reduces maintenance.”

And because the reduction to one thermally insulating and one thermally conductive element enables a compact design, small cut-outs in the clamping plate are sufficient, he adds.

HRScool Evo has a wide range of market applications, including the automotive and the packaging industries. Oerlikon HRSflow emphasizes that this innovative technology contributes to more sustainable injection molding.