The same reason as CHC part, most of the AIM parts are built with plastic (PA6+GF), to reduce part weight, and save energy consumption.

Tool construction of AIM part is very complicated with multi slider movement, hydraulic cylinder sliders, and rotation cores.

The tool design must be very robust to ensure proper tool function, and cooling of the tools is another important point need to be considered & made. to produce good quality parts, and maintain in the whole tool life time.