Basically, all products that should be grinded have to be predispersed with a dissolver first. The quality of this predispersion has a considerable share on the output and fineness of the KREIS-BASKET-MILL®.
The viscosity and thus, the flow behaviour of the grinding stock has to be adjusted to the grinding process. The best grinding results are achieved in case of high viscosities. Low-viscous mixes cause a turbulent flow and consequently, long dwell periods.
BE = d³ * ρ * v²
d= XXX | ρ= XXX | v= XXX
But too high-viscous mixes avoid the grinding beads's acceleration inside the grinding basket even when the machine is running at high speed. The consequence is a poor grinding and a too high temperature is introduced into the grinding stock.
To meet the target, the solids share in the grinding stock should be chosen that high that inside the grinding chamber according friction forces, resiliences and shear forces develop - depending on the peripheral speed which is to be adjusted by the speed.
Depending on the kind and quality of the pigments and fillers used and depending on the energy introduction as well as on the required quality, the grinding can normally take several hours. As soon as the speed does no longer increase despite turning the button (in little steps) to the right, you have to reckon with that the full power of the motor is already transferred into the product. Another indication for this is that the needle of the ammeter has reached the red point.
For an optimum grinding, it is important to have a sufficient viscosity, that means an sufficent share of pigments and fillers in the mix. The concentration has then be chosen correctly, when the product is smoothly rolling and circulating and when a spout is developping. When the material splashes even before the driving motor is running at full speed (needle of the ammeter reaching the red point), the share of the liquid components is too high.