Method for the manufacture of containers
AssigneePLM Aktiebolag
InventorsTorsten Andersson, Bengt Jeppsson
Life of this patent
Estimating the term…
Abstract
Ironing, drawing and/or other non chip-producing process is used to form a metal workpiece into an article which is then coated with a protective layer. The lubricating agents used in the non-chip-producing process are removed from the surfaces of the formed article in conjunction with the coating of the article with the protective layer. This is done by dissolving the lubricating agents in the liquid which is used in the application of the protective layer and which contains one or more bonding agents which form the protective layer after the treatment is complete. In one preferred embodiment, at least that protective layer which is closest to the material of the container is applied by electrolytic deposition.
Claims9
A method for producing a metal article with a protective coating layer in which a workpiece is formed into the article by a non chip-producing operation with the use of lubricating agents, said method comprising placing the thus formed article after the forming operation in a liquid containing a bonding agent, dissolving said lubricating agents from the article into said liquid, and coating said bonding agents onto said article to form a protective coating layer thereon.
Dependencies are inferred from the claim text.