PROCEDEU SI DISPOZITIV PENTRU FABRICAREA CONTINUA A TUBURILOR SUDATE UMPLUTE CU PULBERE

摘要

Powder-filled welded tube is made by forming metal strip into a channel (40), feeding powder into the channel, closing the channel into a tube and welding the closed edges (41) and (42) to form a sealed tube. In order to prevent the powder being affected by the heat of the welding, the amount of powder introduced is such that it only partially fills the closed tube at the welding stage. A subsequent size reduction of the tube causes the powder to become firmly packed, to prevent its movement along the tube.