Water-ring Hot Face Pelletizing System

The water-ring hot face pelletizing system is an efficient and closed hot cutting granulation solution designed specifically for the continuous production of thermoplastic polymers. This system is developed and manufactured by Nanjing Kelongwell Chemical Machinery Co., Ltd. It combines die surface hot cutting with instant water cooling technology and is widely used in the fields of plastic mixing, recycling granulation, and polymer material modification. It is positioned in production scenarios with medium to high output and high degree of automation, especially suitable for processing materials that are sensitive to heat and require spherical particles with extremely low dust content.

·Mold surface hot cutting technology: The rotating blade is tightly attached to the mold surface for cutting, and uniform cutting is completed before the melt enters the water ring to ensure consistent particle size and height.
·High speed water ring cooling: The high-speed circulating water flow instantly cools and solidifies the cut particles, effectively preventing adhesion and ensuring particle quality.
·Automatic knife pressure adjustment: using a hydraulic or pneumatic knife pressure system to continuously maintain a constant contact pressure between the cutter and the template, automatically compensating for thermal expansion and blade wear.
·Integrated centrifugal dehydration: Integrated high-efficiency centrifugal drying unit, with a moisture content of less than 1% in the discharged particles, can be directly packaged or enter the next process.
·Closed loop circulating water system: A sealed water system avoids melt oxidation and external pollution, reduces maintenance frequency, and extends equipment life.

Noted: Details depend on your requirements and need.

Compared to traditional water bath strip granulation or air-cooled die cutting, the water-ring hot face pelletizing system has significant advantages in terms of automation and particle quality. Strip granulation is prone to breakage and entanglement, requiring manual supervision. However, this system synchronizes cutting and cooling to save labor costs.

The water-ring hot face pelletizing system does not require long-distance cooling of the conveyor belt, and the entire line's footprint can be reduced by more than 70%. For high melting point materials, this plastic granulation method can effectively avoid the common "dragging wire" problem during strip granulation, ensuring stable operation of the granulator at full load without template freezing. Compared to underwater pelletizing systems, the start-up operation of water ring thermal cutting is simpler and the operation and maintenance are simpler, especially suitable for medium to high output mixed modification production lines.

·Plastic blending: masterbatch production, filling modification (calcium carbonate, talc powder), blending modification.
·Recycling: After consumption and industrial plastic recycling, the cleaned sheets are granulated into high-quality pellets.
·Engineering plastics: Heat sensitive materials such as PA6, PA66, PC/ABS, etc.
·Hot melt adhesive: produces non sticky and well flowing hot melt adhesive particles.
·Biodegradable plastics: materials sensitive to thermal history such as PLA, PBAT, PBS, etc.

Nanjing Kelongwell Chemical Machinery Co., Ltd. provides comprehensive OEM/ODM services and can customize water-ring hot face pelletizing systems according to customer process requirements
·Template customization: The arrangement of mold holes, aperture size, wear-resistant coating, etc. can be optimized according to material characteristics.
·Material upgrade: SS304, SS316L or Hastelloy can be selected for the production of highly corrosive polymers.
·Automation integration: Customize PLC programs and touch screen human-machine interfaces to achieve linkage control with upstream twin-screw extruders and melt pumps.
·Layout design: Customize equipment bases and pipeline routes based on the customer's existing factory space to achieve flexible installation.

Q1: What is the main difference between the water-ring hot face pelletizing system and the underwater cutting system?
A: The water-ring hot face pelletizing system uses a high-speed rotating water ring to instantly cool the cut particles outside the die surface, and the die surface itself is not submerged in water; The template of the underwater cutting system is completely immersed in the pressure water chamber. Water ring hot cutting is easier to operate, faster to change colors and materials, simpler to start, and has relatively lower maintenance costs within the medium production capacity range (usually below 2500 kg/h).

Q2: Can this plastic granulation equipment handle high filling materials (such as 80% calcium carbonate)?
A: Sure. The water-ring hot face pelletizing system is very suitable for granulation of high filling modified materials. Due to the melt being immediately cooled and shaped by a water ring after being cut off on the mold surface, the particles have no chance to deform or cause serious wear on the conveying section. We can also provide wear-resistant coatings for templates and cutters to further extend their service life.

Q3: What is the difference in particle shape compared to strip cutting?
A: The particles cut by the strip cutting machine are cylindrical in shape, and there may be some differences in length; The water-ring hot face pelletizing system produces spherical or quasi spherical particles. Spherical particles have better flowability, smoother operation in pneumatic conveying, extremely low dust content (more friendly to safety and working environment), and more stable packing density.

Q4: What is the typical maintenance cycle for the cutter and template?
A: The cutting blade usually needs to be ground or replaced every 800-1500 hours of operation, depending on the wear and tear of the material. Templates can be checked in the same cycle. Our system adopts a "rotating swing out" blade design, which allows direct contact with the template and cutter without disassembling the water ring chamber. The time for blade replacement is reduced by more than 50% compared to traditional structures, significantly reducing downtime.

Q5: Is this system suitable for the production of masterbatch with frequent color changes?
A: Very suitable. The water-ring hot face pelletizing system has significant advantages in color changing efficiency compared to other plastic granulation methods. The water ring structure does not require emptying and thoroughly cleaning the entire water tank like an underwater pelletizing system. It only needs to quickly wash the mold surface and pipelines with washing materials to complete color change, usually only 15-30 minutes, greatly improving the flexibility of multi variety and multi color production lines.