Extrusion Asia Edition 1-2023

➠ battenfeld-cincinnati www.battenfeld-cincinnati.com 49 Extrusion Asia Edition 1/2023 高比例的填充物白垩使主要用作下水管道的PVC管不仅 更便宜，而且还能减少化石材料的使用。在K2022展会上，巴 顿菲尔-辛辛那提提出了制造高填充物含量的PVC管的理想解 决方案。在生产线上，分别加入基本的 PVC 配方材料和填 料。然后各个部分进入一个收集料斗，再在与其相连的冷混料 器中相互混合。混合后，最终配混料通过一个立式计量加料装 置传输到挤出机的进料口。混合比和整个物料加工量均以称重 方式监测、控制。白垩输送和白垩计量加料线上的所有容器都 配有搅拌器。因此，填料在整个路线上保持运动，以防止阻 塞。 twinEX 93-34 平行双螺杆挤出机是理想的用于 PVC 配混 料的加工设备。该加工设备采用经专门改造的螺杆几何结构， 具有耐磨保护层，可匀均地输送、塑化配混料。这种解决方案 的优点是白垩含量可在 30 份到 100 份之间变化，可以在任何 时候在较短时间内轻松调整到特定产品所需的配方。直接称量 计量供入白垩的另一个好处是工艺稳定性极高，可确保最终产 品的高质量。而且该工艺无需在加热/冷却混料器中预混 PVC 和白垩。这种工艺变化有几个好处：集中加热/冷却混料器的 尺寸可以较小，或者任何剩余混料能力可用于其他生产线。由 于输送的填料直接送入生产线，所以可以防止材料在输送过程 中分离。 展会上展示的挤出机和称重计量供料装置结合使用，可 使用单层管材模头生产填充密实 PVC 管材。对于由填充中间 层和不含填料的外层构成的三层管材，巴顿菲尔辛辛那提公司 提供适用的三层管材模头和锥形共挤出机。采用这种方式可以 经济、高效地生产直径达 400 mm 的管材，而且，管材使用 后还可再回收。 H igh proportions of filler chalk make PVC pipes, which are primarily used as sewer pipes, not only cheaper, but also re- duce the use of fossil resources. At the K 2022, battenfeld-cin- cinnati presented the ideal solution for manufacturing PVC pipes with a high filler content. A basic PVC formulation and the filler material are fed separately to the production line. The individual components are then put together in a collection hopper and subsequently blended with each other in the cold mixer con- nected to it. After mixing, the finished formulation is passed on to the feed opening of the extruder via a vertical dosing unit. Both the mixing ratio and the entire material throughput are gra- vimetrically monitored and controlled. All containers along the chalk transport and chalk dosing line are equipped with agita- tors. Thus, the filler material is kept in motion along the entire route to prevent bridging. A twinEX 93-34 parallel twin screw extruder serves as processing unit for the PVC formulation. The processing unit features a specially adapted screw geometry with anti-wear protection to transport and plasticize the blend evenly and homogeneously. The advantage of this solution is its chalk content variability ranging from 30 to 100 parts, which can be easily adjusted at any time and at short notice to the formulation required for the specific product. A further benefit of direct gra- vimetric chalk dosing is the enormous process stability, which ensures a high-quality end product. Finally, the process elimi- nates the need for premixing of PVC and chalk in a heating/cool ing mixer. This process change involves several benefits. Central heating/cooling mixers can be kept smaller in size, or any mixing capacities which become free can be made available to other production lines. De-mixing during material transport can be prevented, since the filler material is fed to the production line directly after transport. With the combination of an extruder and a gravimetric meter ing unit shown at the fair, solid PVC pipes with filler content can be produced using a mono-layer pipe die. For 3-layer pipes with a filled middle layer and external layers without filler content, battenfeld-cincinnati offers the appropriate three-layer pipe dies and conical co-extruders. In this way, pipes up to 400 mm in dia- meter can be produced economically and resource-efficiently, which of course can also be recycled after the end of their ser- vice life. www.smart-extrusion.com