BAD OEYNHAUSEN, Germany — January 27, 2020 — Gneuss at Index 2020 — Second generation of multiple screw extruder MRS, IV booster JUMP and new Rotary Filtration System SFneos and CSFprimus
Gneuss Extrusion Technology
Second generation MRS extruder with further improved IV retention and enhanced drive design
Gneuss处理器(GPU) available for more than a decade now and has proven itself for the reprocessing of highly contaminated materials without pre-drying, especially bulky PET waste such as post-consumer bottle flakes and industrial waste from fiber and film manufacture as well as polystyrene, nylon and other hydrophil polymers. Even fiber waste with a high moisture content that is heavily contaminated with preparation oils and other impurities can be fed.
A Gneuss Processing Unit consists of a Gneuss MRS extruder with its unmatched devolatilization and decontamination performance in combination with a highly-efficient Gneuss Rotary Filtration System and an online viscometer VIS for intelligent dynamic viscosity control.
The MRS extruder itself has been improved considerably over the last decade and at the Index show the second generation design will be on display. The enhanced drive design is more robust to handle even more demanding recycling environments. Thanks to several changes in the MRS drum and screw design the already unmatched IV retention has been further improved, while continuing to forgo pre-drying. The MRS extruder permits the processing of PET without pre-drying by means of a simple water-ring vacuum system, so that the material can be used directly for the production of high-quality staple fiber and nonwoven products, also as bicomponents. This is achieved by means of its unique and patented processing section. Based on a conventional single screw extruder, the Multi Rotation Section is a drum containing eight satellite single screws, driven by a ring gear and pinion transmission. The “barrels” cut into the drum are approximately 30 % open and provide optimum exposure of the melt.
得益于此设计，Devolatilized性能约为。五十（50！）倍，比常规通风单螺钉挤出机大 - 仅在25至40 mbar的真空中。同时，尽管其他无干衣技术至少促进了至少部分预直干，但挤出机MR可以处理R-PET，最多可以含有1％的水分含量。通过避免需要深层真空系统和预直采用，MRS是传统技术的经济有效替代品。除节能之外，还有进一步的争论是简单且坚固的设计，较小的占地面积，其易于操作和低维护，加工灵活性以及最后但并非最重要的是其出色的融化质量和同质性。由于MRS技术的出色发光性能（不仅提取水，而且是单体，低聚物和其他有问题的挥发物），熔体具有狭窄的分子量分布，而没有低分子成分。这会导致旋转植物处的断裂，斑点和沉积物的减少（“板出”）。来自FDA，EFSA合规和拉丁美洲的几项本地批准的无反对信（LNO）的信（LNO）证实了这项技术的净化效率。
Polyreactor JUMP
The JUMP is a compact, quick and efficient alternative to conventional SSP (solid state) systems and enables direct reintroduction of the polymer into the production process without the need to remelt the PET.
The reactor is installed directly downstream of a Gneuss Processing Unit and the polymer passes over several slow turning elements which create a polymer film, the surface of which is constantly renewed. The reactor vessel is kept under vacuum, through which volatile substances are reliably removed. By regulating the residence time in the reactor, the vacuum, the fill level and the speed of rotation of the agitating devices, the polycondensation reaction can be altered to achieve the required product properties. The JUMP is a compact, quick and efficient alternative to conventional SSP (solid state) systems and enables direct reintroduction of the polymer into the production process without the need to remelt the PET.
With the IV booster JUMP, the viscosity of polyester (PET) can be lifted to the required level for a given application.
Gneuss Filtration Technology
New SFneos and new CSFprimus Rotary Filter
The continuous Gneuss Rotary Filtration Systems are characterized by a filter disk on which the screen cavities are located in a ring pattern. Screens can be changed on the part of the filter disk that is not active in the melt channel, while the production process continues to run without any interruptions or disturbances. Even with heavy contaminations, as they often occur in recycling and with high filter finenesses, the processing remains pressure- and process-constant.
The new model SFneos was developed to combine the charactertistics of several older models into one simple and cost-efiicient solution, offering the following advantages:
- Constant pressure guaranteed – even during screen changes
- Suitable for most types of polymers and viscosities
- Compact design thanks to an enlarged active screen area (up to 2370 cm2)
- Simple and safe handling and operation with several screens accessible for screen changes
- Very cost effective thanks to its improved design
The SFneos is the ideal filtration system for applications that benefit from a continuous, pressure and process constant screen changer, but that don’t require back-flushing.
Gneuss’ top model, the RSFgenius, operates with an integrated self cleaning system for very demanding applications and highest quality requirements. Screens can be automatically re-used up to 400 times and filtration finenesses below 10 microns/1200 mesh are available.
Gneuss also offers a new semi-continuous model, the CSFprimus. This model is used as a pre-filter, safety filter or in applications with little contamination and is characterized by a very large active screen area for its small footprint.
Gneuss Measurment Technology
数字communic IO-Link熔体压力传感器ation
IO-Link is a worldwide standardised technology for digital linking of sensors and actuators. Communication takes place over a point-to-point connection and is thus not a field bus. IO-Link is manufacturer-independent and is becoming more and more widespread in industrial automation engineering. Most renowned controller manufacturers offer IO-Link masters, which are either directly fitted as an assembly in the controller or installed in the field and connected via a bus system.
The traditional melt pressure sensor with an analogue output knows significantly more than just the process pressure. The signal preparation on its inside has been digitised long ago, and as a result, it is in a position to provide valuable information that simplifies maintenance, increases safety and improves availability. Preventive maintenance and condition monitoring can minimise downtimes and optimise process safety.
The Gneuss IO-Link sensor offers the possibility to access all those information. Its proven sensor technology, in combination with intelligent, digital communication not only offers monitoring of the electronics temperature, but also records the operating hours in different load ranges. Thus, the user can make out, during ongoing operation, when the electronics head is subject to high heat radiation due to its installation location, or the sensor is continuously working at the upper limit of its measurement range.
Advantages of Gneuss digital pressure sensors:
- Monitoring of the electronics temperature
- Recording of operating hours in different load ranges
- Reporting of defined test intervalls
- “Digitales type plates“ for definite assignment of the appropriate sensor for the special application
- Increased flexibility, availability and safety of machines and systems
Posted January 28, 2020
Source:Gneuss Kunststofftechnik GmbH
