A plastic granulator, used for cutting plastic into smaller pieces, is probably one of the most popular types of plastic recycling machinery. With its robust, yet carefully tuned cutting blades, plastic granulators have the unique ability to cut rigid plastics such as water and milk bottles, crates, drums, and plastic films at high capacities into small uniform regrinds, usually between 10-20mm. Size reduction is an essential part of plastic recycling for a couple of reasons:
- As plastics are often times bulky, size reduction greatly improves bulk density, which in return improves overall logistics costs.
- For washing/recycling lines, granulators help turn bulky plastics into a free flowing stream, a requirement for most washing and drying equipment.
How Granulators Work
While granulators are very simple in theory, manufacturing a good granulator requires precision, innovative cutting design, and high quality materials. In a plastic granulator, robust cutting knives are mounted in a specific pattern on a open rotor that is spun at high speeds. Stationary knives are mounted within a cutting chamber at precise locations where they are allowed to come in contact with the rotary knives. As the knives come into contact, plastic scrap within the cutting chamber are cut in a scissor-like motion.
Directly below this cutting chamber lies a mesh screen. This mesh screen is used for sizing the regrinds exiting the granulator. The plastic material will be continuously cut within the granulator’s cutting chamber until the the material is small enough to fall through, the mesh screen size is usually set between 20mm-30mm based on our customer’s specifications.
We offer a variety of plastic granulators models to choose from. Our granulators can be used for dry processing or modified for wet processing, also known as wet granulator.
Our standard plastic granulator has 15 rotor and 4 stationary (bed) knives arranged in a unique double-angle cut array.
As demand on the wear and tear of a granulator’s cutting knives is extremely high, our knives are made from SDK11 (equivalent to D2 in the United States) high-carbon, high-chromium steel which ensures the longest usage times before requiring sharpening.
In addition, all knives are easily adjustable. The cutting chamber comes with hydraulic assisted access to ensure simple, easy exchange or sharpening of knives. Below are specifications of our standard granulators:
|Model #||Rotor Diameter||Knife Width||Rotating Speed||Approx. Output||Motor Power|
|SWP630-1000||⌀630mm||1000mm||470 rpm||1000 kg/h||55KW|
|SWP630-1200||⌀630mm||1200mm||470 rpm||1200 kg/h||55KW|
|SWP700-1000||⌀700mm||1000mm||470 rpm||1500 kg/h||75KW|
|SWP700-1200||⌀700mm||1200mm||470 rpm||1800 kg/h||75KW|
|SWP800-1000||⌀800mm||1000mm||470 rpm||2000 kg/h||90KW|
|SWP800-1200||⌀800mm||1200mm||470 rpm||2000 kg/h||90KW|
*Custom plastic granulators are available based on your request, please contact us.
Placing an Order
The general lead time for our standard plastic granulator is 30 days. For custom orders, the lead time is between 60 – 90 days.