What Is the Working Principle of the Screw Extruder Water Ring Hot Face Cutting System?

I. Working Principle
Hot Cutting Process
At the end of the Screw Extruder Water Ring Hot Face Cutting System, the polymer material is heated and melted and then extruded through the small hole on the die. At the moment the material is extruded from the die surface, the high-speed rotating cutter immediately cuts the melt into particles. The cutting occurs in the air, so the cut surface is flat and the particle shape is uniform.

Centrifugal Force and Water Ring System
The cut molten particles are quickly thrown into the water ring surrounding the die under the action of centrifugal force. The water ring tightly wraps around the die, playing the role of quickly capturing and cooling the molten particles. This link ensures that the particles will not stick and deform due to high temperature, and helps to maintain the integrity and size consistency of the particles.

Cooling and Conveying
The cooled particles enter the connected pipe system with the water flow. The water flow not only helps the particles to cool down quickly, but also provides conveying power to transport the particles from the die area to the subsequent separation and drying links.

Separation and Drying
During the drying stage, the particles and water are effectively separated. The water is recycled, and the particles are further dehydrated and sorted by centrifugal or vibrating drying equipment, and finally become high-quality plastic particles that can be directly packaged or enter the next step of production.

2. Technical features and advantages
High efficiency and stability
The hot cutting system can achieve continuous production, and the cutting speed is highly synchronized with the screw extrusion speed to ensure production efficiency. At the same time, the uniform particle shape is conducive to the smooth progress of downstream processing.

Fast cooling speed and good molding effect
The design of the water ring allows the particles to quickly enter the cooling medium after cutting. This rapid cooling method effectively avoids the problem of particle adhesion at high temperature and ensures the dimensional stability and morphological consistency of the particles.

Strong material compatibility
The system is suitable for a variety of thermoplastic materials, including polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC) and other engineering plastics and recycled materials to meet the needs of different industrial applications.

Energy saving and environmental protection
The water ring cooling system adopts a closed circulation design, which greatly reduces the waste of water resources. At the same time, the system reduces the generation of waste during the processing process, further improving resource utilization.

3. Typical application scenarios
Mixing and modification of polymer materials
During the plastic modification process, the Screw Extruder Water Ring Hot Face Cutting System can be used to produce modified materials with functional fillers, such as flame retardant masterbatch, reinforced masterbatch, etc.

Granulation of recycled plastics
For the recycling and reuse of waste plastics, the system can cut the molten recycled materials into granules for the manufacture of low-cost recycled plastic products.

Production of high-performance engineering plastics
For high-viscosity engineering plastics such as PA and PC, the water ring hot cutting system can meet the production needs of high-end materials with its stable cutting and cooling performance.