Extrusion Asia Edition 2-2019

➠ Herbold Meckesheim GmbH www.herbold.com K 2019: Hall 9, Booth 9B 42 9号展馆, 展台号 9B42 时也需要有最佳化的洗涤过程。塑料回 收重要的一个步骤就是热洗涤，在PET 瓶回收工艺中已经成为了一个主要的步 骤。Herbold Meckesheim已经 对加工 聚烯烃薄膜的这一工艺进行了提升，能 够提供最佳的温度以及合适的滞留时 间，通过使用合适的添加剂，能够获得 最佳的洗涤效果和最佳的终端物料的质 量。 Efficiency and Quality in Plastic Recycling n The machine and plant manufacturer from Meckesheim, Germany will be pre- senting tried and tested process solu- tions for the treatment of plastic waste in Düsseldorf in addition to its wide range of machines. “Size reducing, washing, separating and drying, and ag- glomeration are our main processes. Our customers value our wide range of ma- chine options and the ability to obtain custom plant designs from a single source. With our focus on the circular economy, we are fully in line with the current spirit of the times and with one of the main topics of the K 2019 trade fair,” says Werner Herbold, one of the two general managers. Pre-shredding is an essential process step when the feed material is too bulky to process or when it has to be coarsely broken up before sorting, visual inspec- tion, or testing. We use shredders, gra- nulators, guillotines, and hammer mills for pre-crushing. For example, the New EWS 60/210 Shredder : The demand for high-performance shredders that can process entire bales is increasing, espe- cially when used in washing lines. Her- bold will present the EWS 60/210 for the first time at the K 2019 trade fair. This shredder was developed for dry opera- tion as well as for wet operation and will impress you with its maintenance-friend- ly design in addition to its high capacity. The machine is designed to be very ro- bust and durable. In many plants, the crusher is the first stage in the process. In this stage, foreign bodies are often im- possible to avoid. For this reason, the company has taken some of the special features of this stage into account during its development that cannot be found in any other machines on the market. “We focus on making a perfect wear-protect- ed rotor that, in addition to custom knife configurations, is equipped in particular with bolted armor plating and a special grinding chamber seal,” stated Daniel Zeiler, Head of Sales. The time-consuming hardfacing of rotors is therefore unnecessary. The two-sided belt drive is low-maintenance, and to safeguard against foreign bodies, there is a clutch that prevents damage to the machine when uncrushable feed materi- al is encountered. The maintenance con- cept is tailored to ensure optimal accessi- bility based on ergonomic considera- tions. The first machines are already successful- ly in use at customers in Europe, and the official product launch will take place at the K 2019 trade fair. The new DWS two-shaft shredder : A new two-shaft shredder with the stator positioned in the middle will be presen- ted as a new innovation at the fair. Due to the large surface area of the rotor, the machine has a very good feed perfor- mance and is suitable for materials that can only be fed in doses using conventio- nal shredders such as big bags or high- volume containers. Size reduction : Herbold granulators grind all plastic waste materials, regard- less of whether it’s generated from injec- tion molding, blow molding, deep draw- ing, rotomolding, flat sheet or blown film extrusion, and calendering processes or waste generated during the manufac- ture of pipes, profiles, sheets, or other plastic products. For example, SB granu- lators with force feeding: The Herbold SB series granulators with force feeding have been used successfully worldwide for many years. “We have consciously re- designed this series of machines to en- able complete horizontal charging,” stated Karlheinz Herbold, who is respon- sible for the technology as the Executive Director. The feed material is not fed into the grinding chamber from the top through the force of gravity as in the case of standard granulators, but by even feeding the material into the grind- ing chamber horizontally at the height of the rotor using screw conveyors. To ac- complish this, the machine housing and feed system were completely redesigned to meet all requirements in terms of size- reduction performance as well as ease of access for maintenance purposes. When dealing with difficult applications, there are only a few providers on the market for size reduction technology who are able to offer an appropriate ma- chine. The key to the solution is the rotor design of the SMS granulator. The rotor, which is manufactured from a single forged piece, guarantees stability. Welding seams cannot break because they do not exist. The knives of this rotor cannot shift because they are bolted to a massive backstop. This design also makes cleaning easier since there are no “dead spots” in which grinding residue can deposit. Washing, separating, and drying : In recent years, Herbold has invested a lot in the area of washing lines. In addition to their own technical department, the company has assembled a motivated team of process technicians and project engineers. They are therefore able now to offer the customers complete high- performance solutions. The success of a design that operates well is only based in part on the machines. The treatment of process water also plays a decisive role, especially for washing lines. Herbold also offers solutions covering this area as well now. VWE 700 prewashing unit : An impor- tant component in a Herbold film was- hing line is the multistage prewashing unit, which captures coarse foreign bo- dies and reduces the mineral fraction, both to protect the subsequent machin- es. The remainder is also gently prewas- hed. The type of prewashing developed by Herbold Meckesheim has been a pro- ven technology for a long time already that has convinced our customers. The company has optimized this process step even further by increasing the throughput performance for films, opti- mizing the flow of water, and integrating a baffle plate thickener into the unit to clean the process water. Therefore con- taminants are directly removed on the unit. 57 Extrusion Asia Edition 2/2019