How granulator works?

A plastic granulator, used for cutting plastic into smaller pieces, is probably one of the most popular types of plastic recycling machinery. This machinery is able to cut rigid plastics such as water and milk bottles, crates, drums, and plastic films at high capacities into small uniform regrinds. 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 supply replacement granulator blades (stationary knives and rotor knives), material of granulator blade is D2 steel or equivalent material.

The stationary and rotor knives are working in set. Different models of granulator blades can be provided once the blade drawing and quantity advised.

For details of granulator blade, please email baikun@shungji.com (www.knife-chinese.com)