MC – Twin Shaft Continuous Mixer

The horizontal double shaft continuous mixers have elongated tank geometry, the rotation speed of the shafts is much higher than the double shaft cycle mixers, the blades are much more numerous and in this case, in addition to the mixing function, they also have that of advancing the material from the loading area on the opposite side up to the discharge opening through which the material, already mixed, exits by a continuous flow.
They are used for all the production of cement mixes and conglomerates in general with a low binder content, but they are also perfectly capable of producing cold recycled materials from milled bituminous pavements.
In recent years, their use has become common for the inertization of contaminated soils and for the recycling of materials from building demolitions.
Last but not least, it is used for the production of pumpable mixtures intended for filling underground cavities once the raw material extraction phase has been completed.


Depending on the size of the mixer, either the system is used with 1 single motor with epicyclic reduction in line associated with a parallel shaft reducer with helical teeth or the system with 2 independent motors elastically associated with two opposite angular reducers connected to each other by the synchronization joint.

Even in this type of mixer, the perfect alignment between shafts and transmission parts is guaranteed by the assembly on specially machined bowl body seats.


The following image wants to reaffirm the three-dimensional concept of mixing that is obtained with the horizontal double axis mixers applied in this case to the transit of the material in continuous.
That is, while the material to be mixed receives the maximum dynamic turbulence in the right-left exchange, and vice versa, it is also moved along the axis of the mixing tank towards the discharge opening.


The radial load of the mixing shafts is supported by bearings housed in special seats inside the cast iron supports suitably separated and spaced from the seal packs which prevent grout from leaking.

In this way, even if a maintenance defect occurs with grout leakage, the mixer will never lose its mechanical functionality. The shaft supports are designed in such a way that they can be replaced with the entire seal pack and bearing already integrally pre-assembled (only n.1 piece system).
It is sufficient to insert them on the ends of the shafts and screw the fixing screws on the appropriate connection flanges. Our customers find this system particularly convenient and quick because they don’t have to worry about the correct assembly of all the components inside each support.


As an option, a fully automatic seal lubrication system can be mounted on board the mixer, designed to have safe and constant lubrication inside the mixing shaft supports. The electrically powered pump and the progressive type distributor are made with materials and geometries suitable for working in outdoor environments and with the presence of a considerable amount of dust and humidity.

Filling of the grease tank is arranged through the passage for a bottom loading filter, filling from above is mechanically prevented in order to prevent the introduction of impurities. The pump body houses a mini PLC with an alphanumeric LED display for the timing and control of the automatic lubrication cycle with the possibility of sending alarm signals remotely.


As standard we have the flat execution of the mixing tank cover with access doors equipped with continuous rubber seal with ample thickness of the rebate and double gas springs for assistance and safety stop when opening.

We build the mixing water distributor pipe into the cover with a sleeve inlet. In accordance with the current provisions of the EC machinery directives on accident prevention safety, all our continuous mixers have a lock mounted on the cover for mechanical blocking of doors opening with a key transfer system coordinated with the device maneuver block, supplied by us, intended to be installed on the release system of the electrical power supply of the mixer in the electrical power panel.

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