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What to Consider When Choosing a Plastic Granulator

by mtelec

A plastic granulator is a plastic recycling machine that breaks down products and gets them ready for reuse in related industries. Different types are available in the market, ideal for the various sizes of plastics. Manufacturers can use various plastics in these machines; however, polypropylene and polyethylene are the most suitable since they are easy to granulate, unlike nylon and ABS, which are tough plastics. Recycled products are essential; hence granulator machines are purchased widely. In this extract, we discuss the factors to note when choosing a plastic granulator.

What to Consider When Choosing a Plastic Granulator

Too many granulators exist in the market, and picking the right one for your needs can be challenging. Choosing the wrong machine poses significant risks in certain situations or environments, so the tips below will guide you through the selection process to ensure you get the best machine.

1. Purpose of the Granulator

The intended use of an object always dictates the best type to get. Size is a significant influence on the purpose of the granulator machine. The correct size ensures proper processing of materials based on their size. It won’t be easy to process large plastic components using a small device, and on the flip side, a large machine will not process small plastics well. Since the size factor is essential in the selection process, there are points to consider to help you get the correct machine size.

First, know the application you plan to use the machine on. It can either be molding, extrusion, recycling, or injection molding, depending on your need. Know the material since plastics vary and are processed differently. Identify the dimensions of components to be processed, the feeding methods, e.g., manual or conveyor, and the capacity, i.e., the amount of material processed in an hour.

2. Design of the Knife

It is an essential part of the plastic granulator. The number of knives varies in each machine type as well as their speed, sharpness, and arrangement on the granulator. The knife design affects how granulation occurs and how efficient the device is in its application. The knives are found on the rotating rotor or stationary bed and are spaced differently on each machine depending on the plastic size and type.

3. Machine Maintenance

Maintaining a plastic granulator is crucial and should be done regularly to remove dust and ensure the proper working of the machine. Some people overlook this phase or find it challenging, but the devices come with a manual on how to go about it. The maintenance involves proper spacing of the knives, checking multiple features like the safety switches and rotor locking devices. Also, consider the maintenance cost ensuring it fits in your budget.

4. Machine Rotors

Rotors determine the machine type, and themselves are influenced by the component to be processed. Four types are available: solid or closed., open, staggered and segmented, each fit for a specific kind of plastic.


Plastic granulators are essential recycling machines that you need to pick correctly for the efficient processing of plastics. Above are the important tips to look out for when choosing these devices; however, consider other factors like the price for the best plastic granulator.

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