Granulator Vs. Shredder: Choosing the Right Machine For Your Plastic Processing Needs

Recycling machinery play a vital role in the waste management process by transforming discarded materials into reusable resources. These machines are designed to efficiently process a variety of materials, including plastics, metals, paper, and glass, facilitating their breakdown and separation for recycling. By reducing the volume of waste and enabling the recovery of valuable raw materials, recycling machines help reduce landfill, conserve natural resources, and reduce environmental impact. Their purpose extends beyond mere waste reduction; they contribute to sustainable practices and the circular economy by ensuring that materials are repurposed rather than discarded.

In the world of plastic processing and recycling, size reduction plays a key role in boosting efficiency and minimising waste. Machines for recycling are typically represented by granulators and shredders; each operates differently and excels in specific applications. Since both machines reduce scrap size, it’s easy to assume that any would be suitable for the job. However, choosing a size reduction machine requires a clear understanding of the differences and similarities between granulators and shredders. Properly reducing material size can significantly improve cost and time efficiency while reclaiming and reusing plastic waste, ultimately lowering waste output. Selecting the right solution is essential for optimising your industrial processes.

Granulators are specialised machines primarily used in the recycling industry for grinding materials. They function by using compressed air to rotate a rotor, which aids an internal chopper in breaking down and grinding various materials. In the waste management field, a granulator machine for plastic breakdown is a vital part of the recycling process, as they are extremely effective at processing plastics into flakes or pellets. 

These machines are classified as size reduction equipment that operates at high speeds and low torque, allowing them to cut and slice materials effectively. Inside the cutting chamber, a combination of rotating and stationary blades works to granulate materials into fine, uniform particles. 

• Granulators are particularly well-suited for lighter materials, such as plastic bottles, which may not break down effectively in a closed rotor design.
• To assess whether a granulator is suitable for your needs, consider the desired size of the output material.
• Granulators can achieve much smaller particle sizes for certain materials compared to grinders.

Granulators  are extremely versatile machines capable of handling a wide range of materials, including plastics, rubber, and certain types of e-waste, as demonstrated by such premium models as the Genox granulators. Their compact design helps reduce on-site space requirements while producing uniformly sized particles that are ideal for recycling and reprocessing, so they can be seamlessly integrated into existing production lines, enhancing material flow.

Unlike granulators, a shredder is a size reduction machine that operates at low speed and high torque to tear apart plastic materials, converting them into manageable pieces — though these pieces are generally larger than those produced by a granulator. Shredders are specifically designed to handle large components and reduce them to random, smaller sizes, usually ranging from 1 to 2 inches or more. 

Shredders are typically suited for a wide variety of applications. They are effective for reducing products to make them more compact for landfill disposal, processing items like tires into larger chips for use as fuel or drainage fill, and shredding confidential documents into unrecognisable scraps. 
A plastic shredder machine can also be used to break down plastics for washing, dispose of products due to liability concerns, or prepare materials for other uses. 

A brief summary of the many applications a shredder can excel at; you can find out more about industrial shredders here.

Besides basic size reduction, shredding machines offer a range of benefits, including the generation of raw materials. Shredders are capable of processing different types of plastics and are essential for safeguarding sensitive information by destroying confidential documents. Additionally, shredding machines support recycling initiatives and facilitate the seamless operation of other processes and equipment.

Before dropping your coin on your next (or first) recycling machine, we suggest you consider the following key factors to ensure that your purchase is going to meet your requirements. 

• What Items Do You Need Processed? If your company handles large plastic scraps, a shredder would be much more beneficial, as it reduces large chunks of plastic into smaller, manageable pieces. Conversely, if your facility deals with small plastic scraps and aims to create even finer sizes, a granulator is likely preferable to your needs.
• What Will You Do With the Shredded or Granulated Material? Consider how you plan to repurpose the shredded or granulated material before selecting a machine. Understanding the end use—whether for recycling, manufacturing, or waste reduction—can guide your choice of equipment and ensure it meets your processing needs effectively. Additionally, think about how the material will be handled and integrated into your production workflow to maximise efficiency.
• Throughput Capacity: Consider the operational capacity and the volume handling of the machine. Shredders are better suited for larger load volumes, whereas granulators may not perform as well with lower volumes. In contrast, granulators may not perform as well with lower volumes, which can lead to inefficiencies if the input material does not meet their optimal processing range. It's recommended that you assess your facility's daily throughput needs to select a machine that aligns with your production demands.
• Maintenance & Operational Costs: Assess the maintenance requirements and operational costs of each machine. Regular maintenance is essential for ensuring machine longevity and optimal performance, so consider the frequency and complexity of upkeep tasks. Additionally, consider the overall operational costs, including energy consumption, wear and tear, and replacement parts, to ensure that the equipment remains cost-effective over time. Understanding these factors will help you budget accurately and avoid unexpected expenses.
• Process Integration: Determine how this new machine will fit into your existing processes, and choose the one that best aligns with your production workflow. You should assess the current layout of your operation and identify any necessary adjustments to accommodate the new equipment. A well-integrated system can minimise downtime and streamline operations, leading to improved productivity and reduced costs.

Applied Machinery is one of Australia's leading suppliers of recycling machinery, and the exclusive distributor of Genox Recycling Technology in Australia. Genox offers a comprehensive range of shredders and granulators ideal for reprocessing waste materials for direct input into closed-loop manufacturing, secondary processing, or simply to reduce volume in recycling skip bins.

Their shrdders and granulators are suitable for a wide variety of waste products, and their stella Vision series features high-quality, cost-effective shredders, while the Grand-Calibur series of granulators provides precise size reduction of different materials in a single pass. 

The Applied Machinery team is devoted to meeting all your machinery needs, regardless of their size. You can browse granulators here, browse shredders here, or check out our wide range of equipment over at the Applied Machinery home page. If we don’t have the specific machine you require in stock, we will leverage our network of local and international dealers and end users to locate the best solution for you. For all orders of inquiries, feel free to hit us up via the Applied Machinery contact page.