MP planetary mixers

Key features

• 13 sizes, from MP 75/50 to MP 6000/4000
• Compacted concrete output from 50 to 4000 l per cycle
• Maximum load capacity from 120 to 9600 kg
• Gearbox with a 5-year / 10,000-hour warranty
• Up to four hydraulically operated discharge doors
• Wide range of accessories and options

Technical specifications

Construction

Gearbox

With 70 years of mechanical experience, SICOMA has built a gearbox that is virtually indestructible. The massive double horizontal design is strong and shock resistant. The wide horizontal oil bath runs cool and gives every gear optimum lubrication. It is built for life and carries a 5-year, 10,000-hour warranty.

Mixing blades

The blades complete the mixing action and give fast discharge. They are cast from Ni-hard iron with a minimum hardness of 550 HB for extreme wear resistance. The outer edges are thickened to equalise wear, and the angle of attack is optimised to push rather than slice, maximising both mixing quality and blade life.

Mixing arms

SICOMA's mixing action starts with the arms, which do most of the mixing, from top to bottom. There are three cast iron arms per star, with two stars from MP 1875/1250 and three stars for MP 4500/3000 and MP 6000/4000. Together with two hardened steel scraping arms, they combine toughness with abrasion resistance. Adjustment slots allow easy blade adjustment to compensate for wear.

Discharge

Up to four swing-out sector doors run in rubber seals. They are completely watertight, non-jamming and low in maintenance, which further reduces lifetime cost. All models are hydraulically powered; on smaller models, pneumatic or manual operation is also available.

Half-moon cover

The half-moon cover gives the widest opening, for faster cleanup and adjustment of wear parts while making the process safer all round. It comes in one, two or three parts depending on mixer size. A single-piece cover with hydraulic lift for the easiest access is optional on the largest models.

Liner plates

15 mm Ni-hard cast iron tiles give many times the life of abrasion-resistant steel liner plates and reduce lifetime cost. The bolted assembly makes replacement simple, and the wall plates are reversible to extend life further. Tight fabrication tolerances also mean the blades can be adjusted close to the walls and floor for perfect cleanout between batches, ensuring the best performance on coloured products.

Hydraulic power pack

The power pack has enough capacity to operate the doors reliably even on the largest mixer. A manual lever gives the door a dual purpose: it can be opened during a power failure and closed again immediately afterwards.

Options

Skip for aggregate loading

A skip hoist is available for all MP mixer sizes. The twin-drum hoist equalises the load and prevents the skip bucket from falling if a cable fails. Slack cable detectors also provide reliable and safe operation.

Cement and water scales

All MP mixers can be equipped with weighing hoppers for cement and water. They are fixed to the mixer tank and preassembled at the factory to minimise erection time on site.

Water flowmeter

As an alternative to a water scale, water can be measured with a flowmeter. In some applications it is used mainly for moisture correction of the batch together with a moisture probe.

Aggregate holding hopper

This accessory is strongly recommended so that the mixer can reach its nominal productivity. It is preassembled at the factory and fitted with an OMG SICOMA butterfly valve driven by the mixer's hydraulic power pack.

Botomatic discharge door

For slurry and bitumen mixtures and for powder blending, the special Botomatic door makes the tank perfectly leak-proof. This is particularly important when the tank is pressurised (for gas injection) or depressurised.

Side access door

Where access to the tank from the top cover is impossible or too difficult, the side access door is the right solution. This option is also recommended for special mixtures to improve cleaning of the tank.

High-speed agitator

The function of this additional device depends on the mixture type, speed and blade configuration. For dry mixes it increases the dispersion of materials; for low-water mixtures it crushes any lumps created during mixing.

High-pressure washing system

Using the hollow shaft of the OMG gearbox, the high-pressure pipe reaches the centre of the machine, so the washout jets can be mounted under the scraping arms. All nozzles are adjustable to cover every spot for efficient cleaning.

Dust collector airbag

During aggregate loading from a holding hopper, the dust collector airbag absorbs the air shock created by the fast inrush of material. The airbag is important for dust containment, together with an active filter.

Floor-mounted moisture probe

High-quality concrete production usually requires moisture measurement in the mixer to control the water content of the mix. On request, all planetary mixers can be equipped with moisture probes installed at floor level.

Probe cleaning blade

When a floor-mounted probe is installed, we recommend a rubber cleaning blade that wipes the sensor surface on every rotation of the planetary gearbox and improves measurement quality.

Rotating moisture probe

Thanks to the hollow main shaft (a unique feature of the OMG gearbox), MP mixers can be equipped with a moisture probe fixed to the scraping arm and rotating through the mixture. The probe cables connect to the control system through a rotating collector.

Hydraulic sampling box

All planetary mixers can be equipped with a sampling box for taking material samples before discharge, typically to prepare test cubes. The operator can take a sample easily and safely without stopping the mixer or opening the top cover.

Belt transmission

If the mixer must be installed in a plant with limited height, the motor can be mounted at the side of the tank and a belt transmission used between the motor and the gearbox. This solution is typically used for retrofits and mobile plants.

Manual control panel

The panel is mounted on the mixer and allows the main mixer functions to be controlled locally, making cleanout, testing and maintenance easier.

Discharge door safety guard

When the mixer service platform is installed under the discharge door, a safety guard is required to protect operators while the door sector rotates. The guard can also be dust-proof when the mixer works with dry mixes.

Hydraulic coupling

The hydraulic coupling gives a long service life by reducing high mechanical stress in conditions such as repeated starting with a full load.

Stainless steel tank and mixing tools

Where the material must be contamination-free or the ingredients are chemically aggressive, special materials such as stainless steel are recommended for the tank lining and mixing tools.