Pretreatment systems DIP Type - Overhead Conveyors
The article are hanged on the Overhead Conveyor which takes vertical up & down bends inside the pretreatment tanks. The tanks are made sloping at entry and exit. Generally the conveyor speed is fixed and tank lengths vary according th chemical specifications (Dipping type). This system is suitable for small and medium articles having low weights, few chemical requirements.
Pretreatment systems DIP Type - Transporter
For complete automation of handling of cages in pretreatment system transporters are provided. Semiautomatic version is also available. It has wide load carrying capacity (200 to 1000 kg.) P.L.C. based control are provided for integrated plant management system.
Online Spray Pretreatment systems
Online spray pretreatment is designed best on conveyor speeds article geometry. It is generally used in conveyorised plants where article types are few, geometry is similar and quantities are large. Articles move over the conveyor through modular spray tunnel where the chemicals are sprayed. The chemical tanks with pumps are placed below or on the side of the tunnel. Due to continuous spray the interaction between article surface and chemical is very fast. For elevated tempertature zones insulated tunnel tank modules are provided.