MDW90 0 pages

The new Piovan model MDW 90 is a gravimetric dosing unit equipped with pneumatic slide gates
and screws for the transferring in sequence of up to 6 materials in granules into the weighing
hopper. With a nominal capacity of 90 kg/h, this blender finds its ideal application on injection
moulding and blow moulding machines, and extruders with medium-reduced productions.
Gravimetric blender MDW 90
high dosing precision and repeatability
> Customised configuration. The basic version includes two
dosing stations, which can be increased up to 6, of different
capacity and separate from one another. The stations
can be equipped with slide gates or with screws, and
fitted with a level sensor for activating the functions
of regrind management. In the case of applications in the
medical and food sector, the version with stainless steel
hoppers is recommended.
> Homogeneous mixing of the batch. The new mixer with
semi-spherical shape, and thus with no stagnation point, and
the particular design of the mixing shaft ensure uniform dosing,
with no preferential flow. The surfaces in stainless steel and
with no welding point eliminate the risk of electrostatic charges
and of dust formation caused by friction. The mixer positioned
on a high resolution load cell does not require any adjustment.
Distinctive advantages of gravimetric blenders
> Precise dosing and high process repeatability. Thanks to the specific self-calibration
algorithm, the control guarantees a precision of ± 0.3 over the set value.
> Precise dosing of low percentages with the slide gate device, which can dose down
to 0.7% and ensures uniformity in all batches. Moreover, the design of the dosing groups
and the perfect coupling between the hopper and the slide gate avoid the risk of material
jamming and contamination.
> User-friendly and immediate usage, with no need to look at the guide. Both in the version
with simplified keypad and in the one with touch screen panel, the control ensures
facilitated access to the unit.
> Utmost usage flexibility. The blender can be used for accurate dosing of any type of
material, including critical components such as flakes. Thanks to the functioning of the
high resolution load cell, the system is unaffected by the vibrations of the processing
machine, and the control eliminates any possibility of dosing and weighing error.
> Effective cleaning of the dosing stations, to recover the materials completely. It is
possible to carry out material or colour changes without any problem, thanks to the handy
inclined device for emptying the hoppers quickly.