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Spheronizers


Select the Appropriate
Spheronizer from This Table
Disk Diameter 60, 120, 250mm Dia. Disks 380mm Dia. Disk 500mm Dia. Disk 700mm Dia. Disk 700mm Dia. Disk x 2
  1. Batch size is a function of formulation density and characteristics. Figures are for guidance only.
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T		 Small Image of Caleva Multi-Bowl Spheronizer
Multi-Bowl Spheronizer		 Small Image of Model 380 Spheronizer
Spheronizer 380		 Small Image of Model 500 Spheronizer
Spheronizer 500		 Small Image of Model 700 Spheronizer
Spheronizer 700
Small Image of Model 700 Twin Spheronizer
700 Twin
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E		 R&D Benchtop Pilot Plant or Production Production Production  Continuous Batch Production
Load 1 1 gram - 1kg 1kg - 4kg 3kg - 10kg 5kg - 15 2 x 5 - 15 kg
Companion Equip. MTR3, Mini-Screw Extruder, Extruder 20 Depending on material specification and characteristics: Extruder Model 40, Model 35 or Model 100; Mixer Torque Rheometer.

A Brief Description of the Spheronization, or Marumerization Process

Basic Spheronizer Diagram

Basic Spheronizer

The spheronizer transforms the extrudate from cylinders to spheres. Spheronization is a batch process. The extrusion of the product is a required step prior to spheronization. The size distribution of the spheres is determined by the diameter of the die used extrusion process process and the nature of the formulation.

The basic spheronization machine consists of a rotating friction disk designed to impart friction to the extrudate by spinning at the bottom of a fixed cylindrical drum. The spinning friction disc has variety of groove patterns on the processing surface to chose from.

Spheronizer Process Showing 'Rope-like' Movement

Spheronization Action
Showing "Rope-Like" Movement

Extrudates are charged into the spheronizer and fall onto the spinning disc and are immediately thrown to the drum wall. The cylindrical extrudate segments are cut into segments after a certain amount of time which then, as time progresses, collide with the bowl wall as well as each other and the disc and are then thrown back to the inside of the disc. The ongoing action of particles colliding with the drum wall the disc and each other creates a "rope-like" movement of product along the bowl wall. The cylindrical segments are gradually rounded into spheres by the collisions

When the particles have obtained the desired spherical shape, the discharge valve of the chamber is opened and the granules are discharged by the centrifugal force. This process usually takes somewhere between 1 to 6 minutes.

 

 

 

 

 

 

 

 

 

 

 

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