The stability of the entire system plays a crucial role for the treatment of PVC powder. Dosing systems for a batch process must meet the highest demands in terms of precision and reliability to ensure a consistently high product quality in the long run.

The supply of a wide variety of raw materials requires first-class recipe management via a modern, freely programmable control system. This must also be able to cope with rapid cleaning with frequent recipe changes. The raw materials and additives that place high demands on the bulk material and liquid handling due to their properties are automatically dosed into the heating-cooling mixers depending on the recipe. The finished dry blend is conveyed to the extruder via intermediate silos after this mixing process.

Gentle conveying processes – pressure, suction or mechanical screw conveying is used depending on your application – reduce the resulting separation to a minimum. Inflatable conveying lines, vibrated rubber or PE pipes and the Overflow bypass conveying system ensure the reliable handling of materials even under the most difficult conditions. In addition, blending silos, specifically developed for this task, are even located upstream of the extruder, if required.

Plasticizers and other liquids, temperature-controlled or melted as required, are supplied via liquid dosing systems. Likewise, liquid weighers or volumetric multi-dosing systems are used for closed systems.

Cable sheathing with VPE granulate

Building up tension in a relaxed manner