Recommended for diecastings
The new “trowalplast HDC” plastic grinding media is described as “ideal for grinding and surface smoothing of metal workpieces, especially diecastings,” because high density and sharp edges of the embedded abrasive material significantly decrease process times, and produce “excellent surface finishes at a surprisingly low wear rate.”
Plastic plus zirconium silicate
The HDC (High Density Cut) media consists of a plastic carrier filled with zirconium silicate, thus combining the advantages of lightweight plastic media with the extremely high density of the abrasive filler material. The combination yields metal removal rates that are comparable to ceramic media with surprisingly low wear rate and excellent surface finishes.
The HDC is equally effective in all types of mass finishing equipment, including high-energy centrifugal disk finishing machines, which generally cause a very high wear rate of ceramic media, as well as linear continuous feed vibratory systems, which only allow a relatively narrow band of processing times.
Shape and size
Because of its relatively high bulk density and the sharp edges of the abrasive material the HDC offers grinding characteristics similar to ceramic media. The media shape plays a significant role: the HDC can be produced in all the known shapes and sizes for plastic media
The media color is another advantage: in contrast to the mostly gray ceramic media, the pink HDC media can be recognized if it should become lodged in the workpiece.