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MACHINERY | PELLETISERS


Right: The BKG AH2000 underwater pelletiser from Nordson features hydraulic cutter advance


process requirements with water nozzles installed above the belt,” Wygas says. Different suction positions are available to ensure the required remaining moisture level is achieved for the product. On the ASC equipment, positions can be freely selected beyond the transportation belt.


Cutter advances For its BKG underwater pelletisers, Nordson Corporation now offers three options for advancing the pelletiser with its cutting knives into position at the die plate in the cutting chamber, according to Ralf Simon, Managing Director of Nordson BKG. “The basic option continues to be manual operation by means of a hand wheel,” he says. “Available for easier operation is the BKG type AH, which automates the hydraulic advancement of the cutter. A third alternative, the BKG type AH D system, is equipped with an automated locking system of the pelletiser to the cutting chamber, for operator safety and hands-free start-up.” The manual pelletiser accommodates through-


Below: Delta Kunststoffe selected IPS underwater pelletising equipment for features such as the swivel cutter and ease of change of the hub


puts from 5-2,500 kg/h, against 5-5,000 kg/h for the type AH automatic pelletiser. A larger capacity automatic version, the BKG Type AH D, is available for lines of up to 35,000 kg/h. A hydraulic system ensures a constant pressure of the blade on the die plate, which is said to reduce wear to die plate and blades, eliminate “tails” or mal-formed pellets, and minimise operator intervention. “As hydraulic oil is a non-compressible medium, this system avoids a ‘hopping’ of the blades on the die plate surface,” says Simon.


A further benefit of the


hydraulic blade adjust- ment system is automatic blade sharpening, which can be programmed to occur periodi- cally, he explains. “Hydraulic pressure increases from the level


that is typical in standard production until a rise in motor torque indicates a metal-to-metal contact between blades and die face — normally a thin polymer layer separates the two. At this point hydraulic pressure drops sharply to a level that is sufficient to carry out sharpening while still being higher than standard production pressure.”


Underwater moves Intelligent Pelletizing Solutions (IPS) has added underwater pelletising systems to its existing range of customised strand pelletising systems. The first two systems of the IPS-UWG 75 S have now been installed at Delta Kunststoffe at Weeze in Germany. It is a manufacturer of colour masterbatches, electrically conductive plastics, additive master- batches and special compounds. The compounder already uses several conventional strand pelletising systems from IPS. According to Manfred Fiedler, Operations Manager at Delta Kunststoffe, the company selected IPS because of the design of its underwa- ter pelletising systems, such as the swivel system and ease of change of the cutter hub. Other factors included the clear layout and user-friendliness of the control system, as well as IPS’s ability to integrate a number of user-specific features it required on the machine. The IPS-UWG 75 S is suitable for production of spherical pellets in the manufacture of thermoplas- tic raw materials, as well as in masterbatch, com- pounding and recycling plants. The company says it supplies a complete pelletising system, including melt pump, screenchanger, start-up valve, die plate with pelletising unit, process water system and pellet dryer. “From individual components through to complete solutions, the modular design of our systems both for strand pelletising and for under- water pelletising offer our customers a huge degree of flexibility. Customers get exactly the system they need,” says Gerald Weis, Owner and Managing Director of IPS. IPS also recently delivered four HJCH9 under-


water strand pelletising systems with a working width of 900 mm to a German customer. Each of the systems has an IPS-SGK 720 strand die head,


48 COMPOUNDING WORLD | January 2019 www.compoundingworld.com


PHOTO: NORDSON BKG


PHOTO: INTELLIGENT PELLETIZING SOLUTIONS


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