MEJORAS EN APARATO PARA RECUBRIR EXTERNAMENTE TUBERIA DE METAL CONTINUA CON MATERIAL PLASTICO

• Main Authors: KOPPE HERBERT, SCHEIBER WERNER
• Format: Patent
• Language: Spanish
• Published: 28.01.1982
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

An apparatus for externally coating elongated metal members and, particularly, endless metal tubing with synthetic-resin using a powder-melt process in which the powder is initially fused to the surface of the metal member and concurrently or subsequently caused to coalesce into a coating film. The metal member is passed through a fluidized bed of the synthetic-resin powder after being preheated and the powder is induced to flow along the metal member through an annular nozzle formed on a coating head within the fluidized bed. The powder is advantageously sucked through the coating head and is drawn via the annular nozzle into contact with the metal member.