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These mixers consists of U-shaped horizontal trough in which a heavy duty shaft with two ribbons in helix shape are mounted with the help of arms at different pitch circle diameter.
The ribbon helix is so shaped that when inside mixing shaft rotates, one ribbon pushes the material in one side while at same time other ribbon pushes the material opposite side.
So, particles inside the mixer are given very fast movement and homogenous mix is achieved.
Lark Engineering introduces smart double ribbon screw mixers with its patented ( Pending ) world advanced ribbon design which can perform mixing at much faster rate using minimum of power.
Our patented design

Double ribbon screw mixer is being manufactured in this world from the last many decades with common design features of inner and outer blades. One or more of following problems are generally faced in these designs:

  1. Bending of ribbon and arms particularly near to side walls.
  2. Excessive product heating.
  3. Longer mixing time.
  4. More power per ton of mixing.
  5. Mixing not up to the mark.

In our patented design, both outer and inner ribbons are having variable cross-section area i.e., wider at the start of the ribbon and narrower at the end, both ribbons are having end relief.
With these modifications, we have achieved following results:-

  1. Breakage and bending of ribbons completely eliminated.
  2. Very less heat is generated.
  3. Mixing Efficiency: Due to the usage of much wider blades, more pitch of blades, higher rpm, the mixing efficiency of these mixers is the highest in its class world over

For achieving same mixing result on any other mixer in its class it will at least save 25-35% of time, similarly at least 25-35% power is saved.


Depending on requirement and discharging mechanism, two designs are available:

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