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The Working Principle of Pharmaceutical Roller Compactor

Oct. 08, 2022

Although there are many roller compactor machines available in the market with various parts and components, the working principle still remains the same.


Why Should You Know the Working Principle of roller Compactor Machine?

Even though have designed most of our machines such that they are easy to use and operate. Still, knowing how this machine works is quite important.

Why do I say so?

This knowledge will help you to:

● Choose appropriate settings to achieve the required bulk density of the powder you intend to granulate.

● Analyze sieves with an aim of improving the granulation process.

● Focus on improving quality while reducing production cost

● Select a right equipment that can produce a uniform blend and mixture

● Accurate control of particle hardness and improve dispersion rates

● Control dust and flow properties of materials

Clearly, you can see that a thorough understanding of this equipment is vital in ensuring quality material processing process. 


How Pharmaceutical roller Compactor Machines Work

The working principle of roller compactor machine is simple; it involves the following key processes:

Basically, the idea behind dry granulation is that a fine powder that is subjected to a predetermined amount of force that transforms it into a compact sheet or solid. The key factors that determine the efficiency of the compaction process include:

● roller surface

● Diameter

● Type of material being processed

● Feed screw

● Separating force

● Peripheral speed

● Pressure capabilities


Now, let’s review each of these processes:

● Material Feeding Process

Our machines come with a suitable feed system that allows the powder to flow seamlessly into the compaction chamber.  Quite a number of roller compactor manufacturers use horizontal screw within the feeding section.


 The Working Principle of Pharmaceutical Roller Compactor

 A screw feeding mechanism


The good thing about screw feeding system is that it ensures accurate and precise dosing system.


● Compacting Material during Dry granulation

This section consists of two rollerers that compact the powder to a homogeneous solid with the required bulk density.


The Working Principle of Pharmaceutical Roller Compactor

A compacting mechanism


Ideally, this process displaces air between the powder particles, leaving a solid or sheet; depending on the structure of the compacting mechanism.


● Granulation Process

The small pieces of material (flakes) produced during the granulation process are transformed into a small or large granules. You can see the position of the granulator as in the images above.


NOTE: In dry granulation, you don’t require liquids or binders like in the case of wet granulation.

At every stage, we strive to ensure efficiency and consistency of the pharmaceutical roller compactor. For instance, the modern roller compactors come with fully automated systems, with advanced safety measures.

They increase productivity while reducing downtime.



Generally, the working principle of pharmaceutical roller compactor is straightforward. But, understanding this process alone is not enough; you need to know the various components and the specific objectives of material processing.

It is from this that we will help you choose a suitable machine for any dry granulation process in the pharmaceutical industry. They are available in both custom and standard designs.



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