SHAFT SEALS AND BEARINGS

Ocmix's innovative shaft seals include two separate lip seals that form a positive seal against concrete inside the mixer.  The grease pump distributes a tiny amount of grease to each of the four seals and bearings in turn through four separate feeds that lubricate the bearing and each part of the seal, with different flow rates.  Total grease consumption is only 100 grams per day, eliminating even the smallest chance of contaminating the concrete.  Any stoppage in grease flow or blockage of the distributor creates an alarm signal.  The one-piece bearing/seal mount prevents any chance of misalignment while positive separation between seal and bearing prevents contamination of the bearing.

POWER TRAIN

Ocmix's 2-stage high-efficiency gearbox runs cool, assuring you of long life and best reliability; the top-mounted motors with V-belt drives absorb shock loads.  Molded safety cover meets OSHA requirements and positively prevents even finger access.  Its easy removal, combined with gearbox, splined shaft joint and bearing accessibility mean that if you ever need to replace any parts, you can do it within a one-day shutdown.

To ensure true mounting faces and dimensional accuracy, all mountings for gearboxes and bearings are machined with the whole mixer on the machining center, after fabrication is complete. The mark of quality.

Ocmix gearboxes are guaranteed for 5 years / 10,000 hours.

DISCHARGE DOORS

The hydraulically operated discharge door has Open and Closed position switches plus an optional part-open switch.  The eccentrically mounted door and rubber seals ensure watertight operation and a long, wear-free life.  Dual pressure/position sensing gives a cross-check on full closing while compensating for wear.  Both full and reduced width doors are available;  the reduced width version reduces the height of the discharge chute in applications where a slightly longer discharge time is acceptable.  Door position switches are proximity type and are adjustable, with a precise positioning action.

Note the covers on the liner plate fasteners;  these are welded nuts, allowing replacement without need for access from underneath.

WEAR PARTS

Ocmix paddles and liner plates are Italian-made ni-hard cast iron with certified minimum HB600 hardness, guaranteeing the best strength and longest wear.  Mixing arms are cast from spheroidal cast iron for toughness with wide,  streamlined design to minimize buildup.  Their 90º angle optimizes mixing action while minimizing stress of the shafts. The no-collar and one-size-fits-all arm design minimizes spare parts as well as making replacement simpler.

The Ocmix RG mixer shell accommodates more paddles than most others of the same capacity, making it the fastest and most homogeneous mixing in the industry.

PIGGYBACK MIXER FEED SYSTEM

The no-problem plant is quickly erected by use of the optional professionally designed Piggyback Mixer Feed Unit.  It houses a fully enclosed aggregate hopper with clam gate, cement scale with butterfly valve and water scale with large diameter discharge manifold.  Weighed admix containers can be added too.  The whole assembly, including upper access platform, stands atop the mixer and is integrated into the mixer's top cover, making erection of the whole plant a simple and speedy procedure.  Structure and scale hoppers are of hot galvanized steel;  dust shell is painted.  Note that air bags are not recommended for dust suppression; an air filter is used since this can handle the large volume of displaced air without any problem.

AGGREGATE BYPASS OPTION

Unique to Ocmix, a hinged sidewall (shown part-open) allows aggregates to enter the mixer or to bypass.  In the bypass mode, the mixer handles sand, cement and water;  the aggregate discharges straight into the transit mixer as the mixer discharges the sand/cement/water slurry.  Final mixing takes place in the transit mixer;  this allows the plant to handle double the batch size, double the throughput per hour, while still gaining the advantage of better mixing and superior concrete.  Even the largest trucks can be filled in one step with only an RG7500 (6.6 yd) mixer.

Another variation is a combined cement and aggregate bypass, allowing the mixer to be bypassed completely when desired.  The cement bypass pipe is shown at left in the picture.

Two rotating jet assemblies force powerful jets of water in every direction, cleaning every surface thoroughly.  A manual gun is supplied for hand cleanup of the remaining difficult spots

ACCESS HATCH

Large opening in cover allows easy access for maintenance and cleaning.  Spring counterbalanced on both sides, the hatch is easily opened.  It contains two inspection hatches;  both inspection and main hatches are gasketted and a safety limit switch is standard.  Optionally, a Key Transfer Lock can be fitted as well.