Accessories for underwater pelletizing
The issue of water, water filtration, and water treatment plays an important role in the underwater pelletizing of plastic pellets. To meet the demands, MAAG offers appropriate additional equipment and accessories for underwater pelletizing systems. PURO® is a highly efficient and compact process water system, suitable as an accessory for almost all applications. The various temperature-controlled water systems convey and cool the pellets in a closed circuit from the cutting chamber to the dryer.
The BF process water system is equipped with a band pass filter, and is mainly suitable for use where ultra-fine particles are produced or where product changes frequently occur. It collects and transports process water at sufficient pressure, cools the water, and continuously separates cutting dust or impurities from the water. This keeps the process water “pure,” and means that in most cases it is not necessary to change the water.
The CBF continuous band pass filter is designed as a retrofit kit for underwater pelletizing systems where ultra-fine particles are often produced and have to be removed. Screens and arched screens remove ultra-fine particles from the process water and prevent product contamination.
Precise, state-of-the-art electronic control of machinery in polymer processing plants is becoming more and more important. As an integral component, the control system ensures the interaction of all system components and the monitoring and control of the relevant process parameters such as the start-up valve, the temperature of the die plate, the speed and contact pressure of the knife head, the dryer, as well as the delivery rate of the water pump. The control system varies according to the additional equipment. The touchscreen controls and the visualization system can be customized to individual requirements.
Start-up is a key phase in the underwater pelletizing process. Simple starting switches, bidirectional starting switches, and multidirectional starting switches are among the additional equipment items in this area. Accessories for Gala and Automatik underwater pelletizers include die plates and die plate grinding tools, knives and knife heads, cutting chambers and cutting chamber bypass piping, agglomerate separators, screens, rotors, pellet distributing flaps, and non-stick coatings.