The renovation of sports surfaces through abrasion of the
surface layer and subsequent recoating is becoming ever
more important as an alternative to complete renewal. The
reason is, in this way, considerable costs and materials are
saved. After the recoating, the thickness and consquently
the technical properties of the surface coating remain
preserved or may even be improved.
The RauMatic R251 is a milling machine for milling off the
surface coating from elastic PU sports surfaces. In this process,
the milling cylinder abrades the surface away with
a speed of approx. 3.000 rpm. The milling cylinder is approx.
350 mm wide and equipped with milling discs which
use tungsten carbide. The machine’s built-in suction system
immediately extracts the abraded material away from the
milling tool and simultaneously cools the work area. In this
way, any detrimental heating-up of the tools and the coating
is prevented.
The material is immediately transferred into a filter unit.
Cartridge filters separate the exhaust air from the abraded
material. This is caught in a dirt container with a capacity
of 500 liters and can be disposed of with a minimum
of effort. The use of several interchangeable containers
makes it possible to work continuously without prolonged
interruption. The thickness of material to be abraded is
regulated automatically in the millimeter range through a
touch probe system. Thicknesses from 1 to 5 mm can be
removed in one work operation. Depending on the quality
of the substructure, the new surface layer can then be applied
as required.
The drive for the machine is provided by an extra powerful
diesel engine, producing 70 kW (96 HP) of power. The steering
and the feed drive are provided using hydraulics.
A hydraulic motor brings the filter cartridges into position in
rotation for cleaning-off. When full, the dirt container can
be hydraulically lowered for removal and is then replaced
with an empty container.