For the production of PVC profiles, Plantech provides complete and automated solutions for the storage, handling and dosing of powders.
Plants fundamental for feeding process machines like Turbomixers or Extruders. The supply of silos includes ladders and walkways, product filling pipes, dedusting filters, safety valves, level indicators and vibrating cone extractors if the products contained in them are not very flowable.
When the raw materials come in bags or Big Bags, Plantech provides its own manual or automatic bags emptying stations and Big Bags emptying stations,provided with hoist or spider for direct loading or using forklift truck. In both cases, the machines may be provided with specific optional devices, such as flat bottom extractors, pneumatic vibrators and fluidisation devices.
The dosing stations used for supplying the additives necessary with accuracy for the formulation of the Dry Blend are constructed for powders as well as for liquids, using dosing units and weighing scales, while the pre-weighed bags containing the additives which complete the formulation, are automatically fed into the turbomixers at each batch by means of a special belt.
In plants for the production of PVC profiles, the choice of handling systems is assessed according to the distances to be covered, the type of product to be handled, the flow rates required and the type of process to be served.
The system that is mostly used is the pneumatic conveyor, for the extraction of products from silos and from the scales for feeding the weighed cyclone filters upline of the turbomixers or pressurised for loading storage silos from the Big Bags emptying stations, or also in the dense phase when the dry blend has to be conveyed for considerable distances without demixing.