Dosing and mixing

We design, build and install systems for dosing and mixing many different products.
The system we adopt depends essentially on the physical characteristics of the materials to dose and blend:
for example, for free-flowing materials for which dosing must be precise, we use electromagnetic feeders or belt feeders,
which allow for good accuracy, while we adopt electromechanical feeders when precision is less important.
We build both continuous and discontinuous systems for dosing and mixing.
Whenever possible we design continuous mixing plants consisting essentially of belt extractors,
which ensure very high accuracy thanks to electronic weighing,
and of continuous rotary mixers which have much lower energy consumption compared to batch mixers.
For the most challenging applications (e.g. aggregates that are highly adhesive or under impact mills)
we adopt reciprocating plate feeders with a mechanical or hydraulic drive.
We have designed and constructed reciprocating plate feeders of different sizes
and we always combine reliability in dosing with machine robustness.

Electromagnetic feeder

To dose free-flowing products with low flow rates, especially when dosing needs to be highly accurate,
we use feeders suspended on elastic elements driven by electromagnetic vibrators: the electromagnetic feeder.
These make it possible to adjust the volume being transported at any time,
even while the machine is operating because shutdown takes place in a fraction of a second and the flow is stopped instantaneously.
These two last features are very important to ensure accuracy in dosing.
Estrattore dosatore elettromagnetico

Electromechanic feeder

When high dosing accuracy is not required, we adopt a steel trough suspended to an elastic system
activated by two electromechanical counter-rotating vibrators: the electro-mechanic feeder.
The two electro-vibrators, mounted symmetrically on the steel channel, and rotating in opposite directions,
determine a pulsating unidirectional force which makes the elasti c system vibrate.
The vibration of the system extracts the product from the hopper and doses it.
These machines are very robust and can, within certain limits, ensure acceptable dosing accuracy if driven by frequency converters.
Estrattore dosatore elettromeccanico

Reciprocating plate feeder

When the materials are coarse-grained or are non-homogeneous a reciprocating plate feeder is used.
A steel plate moves in a reciprocating way on wheels and is activated either by means of a rod-crank system or by a hydraulic cylinder.
The reciprocating motion of the plate causes a discontinuous extraction of the material.
The system is robust, but does not ensure the continuity of dosage flow.
Estrattore dosatore a carrello

Belt feeder

The belt feeder is a very accurate dosing system constituted by a belt conveyor that carries out the extraction from the hopper,
and the continuous control of the flow rate thanks to an electronic weighing system.
In addition to the electronic speed control, the flow rate accuracy is ensured by a mechanical system
which controls opening of the hopper extraction mouth.
Estrattore dosatore a nastro

Apron feeder

The apron feeder is constituted by a metal framework equipped with rails,
a track formed by steel plates coupled to driving chains and a drive unit.
It is suitable for heavy-duty applications in quarries, appropriate for use with all types of material,
but especially for the extraction of pieces of large dimensions.
Extraction from the hopper is carried out by the continuous motion of the track.
The accuracy of the dosage is assured, not only by the track speed control,
but also by the inclination of the track itself compared to the internal material friction angle.

Continuous mixer

The continuous mixer consists of a rotating cylinder equipped with inner paddles,
which have the function of mixing the products coming from the dosing system.
Inside the continuous mixer, the mixed products may be coloured with the addition of other solid or liquid components.
At the end of the cylinder, a conical grid can be installed to separate the unwanted lumps or bulky pieces in the mixture.