Granulating water ring pelletizing – Display

The water ring pelletizing process unfolds through these key stages:

Plastic Melting: Recycled plastic waste—such as PE or PP films and scraps—is fed into an extruder, where a screw melts and plasticizes it before extrusion through a die head.

Hot Die Face Cutting: Molten plastic emerges through die holes and is instantly sliced into small pellets by rotating blades at the die face—a technique known as “hot cutting.”

Water Ring Cooling: Freshly cut, hot pellets are propelled into a circulating water ring encircling the die head, where rapid cooling solidifies them and prevents sticking.

Separation and Drying: Cooled pellets are transported by water flow, separated via a vibrating screen or centrifugal dryer, and air-dried to yield moisture-free granules ready for use.

A water ring pelletizing system integrates these vital components:

• Extruder: Melts and drives the plastic material through the system.

• Die Head: Features uniformly spaced holes for extruding molten plastic.

• Water Ring Cutting Unit: Combines rotating blades with a water ring cooling system for simultaneous cutting and cooling.

• Dewatering Equipment: Includes a centrifugal dryer to separate pellets from water.

• Drying and Storage System: Uses vibration screening for pellet sorting, air drying, and storage in silos.

• Operational Simplicity: Offers rapid startup and minimal operator involvement compared to strand pelletizing.

• Cost-Effective Maintenance: Features affordable, easy-to-replace blades, ensuring durability and low upkeep costs.

• Broad Applicability: Excels in processing free-flowing plastics like HDPE, LDPE, and PP—perfect for recycling films and woven bags.

• Superior Pellet Quality: Yields smooth, spherical pellets with excellent flowability, simplifying packaging and transport.

• Energy Efficiency: Optimizes cooling and drying processes for reduced energy consumption.

• Plastic Recycling: Reprocesses post-consumer films, industrial scraps, and other waste plastics into reusable granules.

• Plastic Compounding: Produces masterbatches, including filled or colored pellets.

• Polymer Processing: Granulates specific polymers such as PE, PP, and EVA.

Versus Strand Pelletizing: Strand pelletizing extrudes plastic into strands, cools them in a water bath, and cuts them after cooling—ideal for high-viscosity materials. Water ring pelletizing, however, uses direct hot cutting, streamlining the process for low-viscosity plastics.

Versus Underwater Pelletizing: Underwater pelletizing cuts pellets in a submerged water environment, perfect for high-viscosity or heat-sensitive materials like PET, producing near-perfect spheres. Water ring pelletizing offers a simpler, cost-effective alternative for less demanding tasks.

Water ring pelletizing shines as an efficient, economical, and user-friendly solution for plastic granulation, especially in the recycling industry. Its adaptability to materials like PE and PP, combined with its ability to produce high-quality, uniform pellets with minimal complexity, positions it as an ideal choice for manufacturers prioritizing optimized production and cost efficiency.