Extrusion Asia Edition 2-2020

Gneuss 加工过程恒定，全自动自清洁连 续过滤器 RSFgenius Gneuss Process-constant, Fully- Automatic Self-Cleaning Screen Changer RSFgenius 得益于独立设计、量身定制的解决方 案，快速获得投资回报 除了提供一系列高效、工艺恒定的 熔体过滤系统外，Gneuss 还拥有一支 经验丰富的专家团队，他们的专业是将 其系统集成到现有的挤出生产线中。在 与客户的紧密对话中，制定出单独的解 决方案，使加工商能够将 Gneuss 系统 改造到其现有的挤出生产线中，从而以 绝对最少的更换网片和生产中断，从而 确保客户能够立即利用效率的提高，并确保快速的投资回 报。 T his also applies to the manufacture of ABS and PS sheet for technical applications. The properties of thermoplastics such as PS and ABS are particularly well suited to recycling. Melt Filtration as the Key to Increasing the Proportion of Recycled Material When considering the use of recycled material in a process such as ABS and PS sheet for technical applications, it is important not only to consider the effect of the recycled material on the properties of the product, which has to achieve strict and strin- gent quality requirements. The process and the economics of the process itself must not be compromised by down time, variations etc. The Melt Filtration system is perhaps “the” key to enabling the use of recycled material without compromising production effi- ciency whilst maintaining the highest possible product quality. However: whilst the typical screen changers usually supplied as original equipment with extrusion lines are generally acceptable when processing only virgin material, they quickly become a bottleneck in the production process as soon as recycled mate- rial is used in any quantity. A major German manufacturer of PS sheet for thermoforming to technical parts recognised this aspect early and equipped three extrusion lines with Gneuss RSFgenius Melt Filtration Sys- tems. By retrofitting the extrusion lines with these systems, they were able to re-use all their internal waste: not only edge trim but also the skeletal waste and off cuts from the production of the thermoformed parts themselves. Another well known German manufacturer of ABS and PS sheet for technical applications (e.g. for vehicle interiors) retro- fitted their extrusion lines with the Gneuss RSFgenius Melt Fil- 21 Extrusion Asia Edition 2/2020 ➠ Gneuss Kunststofftechnik GmbH Mönichhusen 42, 32549 Bad Oeynhausen, Germany www.gneuss.com tration System in place of the original equipment screen changer which was supplied with the extrusion line. When selecting a Melt Filtration System for a given application, it is important to consider not only the ability of the system to handle the contamination load which the recycled material brings - and to achieve the required filtration fineness, but also the impact of the system on the process consistency. This is another area where the Gneuss Rotary Melt Filtration Systems offer a major advantage: The Gneuss RSFgenius system for ex- ample, can operate with a guaranteed pressure consistency of +/- 2 bar even when processing heavily contaminated recycled material. Thanks to the efficient, electronically controlled high pressure purging system, the screen packs can be regenerated in situ up to 400 times. This can mean intervals between screen pack changes of several months (during which the system ope- rates without attention) and replacement of the screen packs takes place without production disturbances. Most screen changers developed for recycling were developed for repelletising lines, where there are few space constrictions. The Gneuss Rotary Filtration Systems however are compact and designed with retrofitting to existing lines in mind. Fast Return on Investment Thanks to Individually Engineered, Tailor Made Solutions In addition to offering a range of highly efficient, process-con- stant Melt Filtration Systems, Gneuss also has a team of experi- enced specialists whose speciality is integrating their systems into existing extrusion lines. In close dialogue with the custo- mer, individual solutions are worked out so that the processor can retrofit a Gneuss system into their existing extrusion line with an absolute minimum of conversion work and disruption, thereby ensuring that the customer can immediately take ad- vantage of the efficiency improvements and a fast return on in- vestment is ensured.