PELLETISING | MACHINERY
Maag’s EBG200 dry-cut conveyor pelletiser uses the company’s Hot-Air Knife technology
read process data in real time, while all controls are located next to the cutting head to make them easy to access and read. The sound insulation system has been optimised to reduce operational noise levels. Maag says spare parts can be exchanged between the original Primo S and new SI models.
crucial, according to Baumann. Conventional screen changers and backflush filters may not
Below: Maag’s new Pearlo XXL high output underwater pelletiser uses AMN’s liquid-heated die plate
be sufficiently effective when compounding recipes with recycled content, which typically contain increased contamination levels. Maag’s Ettlinger continuous filtration system can handle up to 16% contamination. Material flows over a rotating drum to remove contamination in the equipment, which is self-cleaning. The filters are equipped with a pressure sensor to automati- cally adjust and maintain a steady pressure, allowing them to run for weeks or months at a time without intervention. Baumann says the minimal pressure change characteristic of this system is beneficial for any type
of compounding, whether or not it contains recyclate.
At K2022 in November last year, Maag launched the ContiNeo backflush
screen changer, which it says combines the advantages of a piston screen changer with those
Right: Coperion’s SP strand
pelletisers are said to offer easier operation and improved pellet quality
of large-area filtration. The automated, self-cleaning filter keeps pressure constant and is designed to minimise material loss. On average, backflush material loss is said to be 0.5-1%. Maag’s underwater pelletisers use turbine-style blades that are designed to produce less turbu- lence for more consistent water cooling while tangential input into the cooling chamber optimis- es pellet residence time in the cooling chamber. Careful attention to cooling is especially important for handling of crystalline polymers, such as PET, says Baumann, who explains that consistent cooling produces more consistent crystallinity. The company also introduced some new pelletis-
ing hardware at K2022. The Primo SI strand pelletiser is an updated version of the Primo S, providing an open frame design that is flexible in terms of configuration and is accessible from all sides. A centralised drive system allows the operator to configure parameters via a Bluetooth interface and
32 COMPOUNDING WORLD | January 2023
www.compoundingworld.com
Advanced die plates Also new is the Pearlo XXL high-capacity underwater pelletiser, which is designed for production throughputs of more than 40 tonnes/h. It features updated tools and chamber that improve thermodynamic performance. The large-diameter, liquid-heated die plates include more than 2,000 die holes using technology from AMN, a French specialist that Maag Group acquired in 2022. AMN dies include a cutting face with tungsten carbide nibs, intelligent one-way heating circuits, and a vacuum insulation system. The latter places insulation under the cutting face and is said to help create a tight pellet size distribution. The AMN Central Injection System is said to improve pellet cooling and injection and can provide benefits in high-volume pelletising of high melt index materials. Maag’s new introductions are completed with the eXso pellet dryer, which is an updated, smaller- footprint version of the company’s legacy dryers. It offers multiple pellet inlet and water outlet connections that make it suitable for a wide range of underwater and wet cut strand pelletising applications with throughputs up to 8,200 kg/hr. The new design also has fewer wear items and improved access for cleaning. The SP line of strand pelletisers from Coperion has been updated with new features that are designed to simplify handling, reduce downtime for product changes, and improve pellet quality. The SP140, SP240 and SP340 pelletisers cover throughputs from 100 to 3,000 kg/h and use an improved strand intake design in which strands are continuously and directly guided into the cutting
IMAGE: MAAG
IMAGE: MAAG
IMAGE: COPERION
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72
