MACHINERY | LAB COMPOUNDERS
Right:
Bausano’s MD30 co-rotating extruder can be used in direct production of PVC and
polyolefin pipe
nozzle at the main supply, or half- or two-thirds of the way down the cylinder depending on the dispersion and mixing requirements of the various components. The 30/19 unit is equipped with one forced degassing unit, while the 30/30 model can have either one forced degassing unit or one forced and one 1 free degassing unit. Both versions of the MD30 are mounted on wheels.
Most, if not all, PVC compounding lines use
counter-rotating twin screws as the material’s sensitivity to heat and friction makes the co-rotat- ing compounding technology used for most other thermoplastics unsuitable. In the new extruder design, it is possible to switch between co- and counter-rotation simply by changing the screws and selecting the corresponding screw rotation option on the gear box. The standard model is supplied with an L/D ratio of 40, but Jurgensen says this can be increased substantially. The unit can also be fitted with side feeders as well as gravimetric dosing systems.
Direct options
Intended primarily for direct PVC production applications, Bausano’s MD30 counter-rotating laboratory extruder is designed to provide high mixing capacity at an extremely low number of revolutions. The machine is also said to be suitable for processing polyolefins for applications such as pipes that require the addition of high levels of fillers, masterbatches and additives. “We regularly process polyolefin pipes of various types on the MD30, with or without additives, and also thermo- plastic rubbers and organic fibre compounds,” says the company. Two options for feeding solid additives are
provided on the MD30: either through an addi- tional volumetric or gravimetric dispenser mount- ed laterally at the same point as the main hopper (MD30/19), or further down the cylinder (MD30/30). “This newly designed line also makes it possible to change the position of the main supply by sliding it on side guides in order to set up the line as 30/30 or as 30/19,” Bausano says. Two options are available for feeding liquid additives: either into the supply outlet through a
48 COMPOUNDING WORLD | December 2020
Lab investment Spanish technical institute Aimplas installed an 18mm diameter Leistritz ZSE 18 HP-PH laboratory extruder within a ISO Class 7/GMP cleanroom at its Plastics Technology Center at Valencia in August. “We want to expand our field of activity in the pharmaceutical (HME) and cosmetics industry, materials for bone and tissue regeneration and medical device developments among others,” says Raquel Llorens, Health Senior Researcher at the institute. The new machine is equipped with a side-feeder for conveying material downstream into the melt and is qualified in accordance with the latest GMP guidelines, including the control system. According to Leistritz, the ZSE 18 HP-PH twin screw com- pounding extruder design is well suited to the hot melt extrusion, wet granulation and filament extrusion processes Aimplas plans to use and is suitable for developing formulations as well as small batch production. It adds that all ZSE HP-PH machines from 12 to 50mm screw diameter share the machine geometry to simplify scale-up. Japanese compounding research and develop- ment company DJK Corporation, which is located in Chiba, recently took delivery of a ZSK 32 Mc18
twin
screw extruder from Coperion. Configured to provide maximum flexibility in laboratory operation, the machine can be equipped with ZS-B side feeders, Feed Enhancement Technology (which optimises material intake capacity) and ZS-EG side devolatilisation unit. Coperion says its cooperation with DJK also means that Coperion customers in Japan now have a testing area at their disposal.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.centuryextrusion.com �
www.icmasg.it �
www.mariscorp.com �
www.polimerteknik.com �
www.jsw.co.jp �
www.feddem.com �
www.labtechengineering.com �
www.bausano.com �
https://extruders.leistritz.com/en �
www.coperion.com
www.compoundingworld.com
IMAGE: BAUSANO
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