What Is Plastic Granulation?

Plastic granulation is a size reduction process which forms part of the overall plastic recycling process for rigid plastics. The output of the process is plastic regrind.

Hard plastics need to be reduced in size before they can be fed into machines which will melt them down and enable them to be converted back into pellets that can be moulded into new products.

The Granulator

The image below shows a typical plastic granulator used to perform plastic granulation.


Plastic Granulation Machine
Typical Plastic Granulator

Key Components

The Feed Hopper – when closed it enables the plastic to be safely fed into the granulator with the deadly rotating blades more than an arms length away.

The Fly Blades – mounted onto a rotating shaft, the fly blades do the bulk of the cutting.

The Dead Blades – these are fixed blades which trap the plastic or the fly blades to do their work.

The Screen – which prevents the plastic escaping from the granulator until it has been chopped down to the required size.

NB. There are different types of granulators with slightly different configurations of the blades and rotors. There are open rotor granulators, closed rotor granulators and semi-open rotor granulators. Which one you choose depends on the plastic components you are working with.

How It Works

You feed the plastic components into the feed hopper (usually on a conveyor belt). They drop through the neck of the hopper onto the rotating fly blades.

Initially the blades will chip pieces off of the plastic parts. When the pieces get small enough they will start to drop between the fly blades and get caught by the dead blades where the fly blades will continue to chip away until the pieces of regrind (the granulated plastic) are small enough to drop through the screen and get conveyed away into the waiting bag or box.

For heavier, bulkier items a pre-shredding process is often employed. Shredding is where the plastic is shredded or ripped into rough pieces which can then be fed into the granulator. This speeds up the granulation process and reduces wear and tear on the blades which have to be sharpened regularly.

What Is Plastic Regrind?

Plastic Regrind
Plastic Regrind

The output from the plastic granulation process is regrind.

Rough chopped pieces of plastic which are unrecognisable from the original plastic product which also make the process ideal a method of secure destruction.

In this instance the plastic is from the clear part of CD cases.

What Can Storm Recycling Do For You?

Toll Processing – if you have plastic scrap and would like it back in a usable format Storm Recycling can arrange for your material to be processed either to regrind or we can take it a step further and have it compounded back to your desired specification. CONTACT US

Secure Destruction – if you have redundant plastic products, items damaged and subject to an insurance claim, confiscated items etc that need to be destroyed to prevent them from re-entering the market as goods we can help. CONTACT US

We can purchase your plastic regrind – GET A QUOTE

We can source and sell regrind to you – GET A QUOTE

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