Ocmer North America

PLANETARY MIXING CYCLE - to give the fastest mixing times

Although the total cycle time is dependent on the speed at which the charging takes place as well as the type of concrete being produced, typically Ocmix planetary mixers can produce a batch of wet cast concrete in less than 120 seconds, with dry cast, block and paver mixes taking a little longer, depending on the type of moisture/water dosing system employed.  Note that some admixtures require extra mixing time.  The diagram below assumes that the aggregates are waiting in a skip or hopper, ready for discharge.  Note the Premix time before water is added;  this is essential to proper mixing and fast mixing times.  Mixer discharge is from 30 seconds for repetitive loads to 40 seconds for full cleanout when running different coloured products etc.  Contact us for specific applications.

When assessing the cycle time for your own plant, substitute your own plant's times for aggregate, cement and water charging, and longer discharge times if feeding a conveyor.  Note that the next batch is being weighed up as the mixing continues, so that it can charge the mixer as soon as the previous cycle is complete and the discharge door is closed.

Wet cast cycle (typical)

Charge aggregates 

5s

 

 Refill

 

Charge cements

 

15 sec

           

Refill

   

Premix time

   

20 sec

           

Premix

 

Charge water

     

20 sec

           

Refill

Charge admixes

Air

 

Other

 

Refill

 

etc.

Final mixing time

 

20 sec.  

 

Discharge time

 

26-36 sec

 

Door close

 

4s

 

Total cycle time

Repeat cycle, beginning to end = 110 to 120 seconds

 


Dry cast cycle (final water added as moisture is monitored, see "Fast Micromix")

Charge aggregates 

5s

 

 

 Refill

 

Charge cements

 

15 sec

             

Refill

   

Premix time

   

20 sec

             

Premix

 

Charge main water

     

15 sec

             

Refill

Charge admixes

Air

 

Other

 

Refill

 

etc.

Add final water

       

30-40 sec.

             

Final mixing time

 

40-50 sec.  

           

Discharge time

 

 

26-36 sec

 

Door close

 

 

4s

 

Total cycle time

Repeat cycle, beginning to end = 125 to 145 seconds