Metal container processing method

Abstract

A metal container processing method includes steps of: a) stamping a metal sheet material into a blank container subject to the desired shape, b) removing sharp burrs and dents from the surface of the metal sheet material of the blank container with sodium nitrite solution, c) covering the surface of the metal sheet material of the blank container with a layer of surface coating of phosphorous compound, and d) covering said layer of surface coating with a layer of heat insulation coating containing Teflon and heat insulating material at the ratio of about 100:25˜35%.

1 . A metal container processing method comprising the steps of: 
 a) stamping a metal sheet material into a blank container subject to the desired shape;    b) removing sharp burrs and dents from the surface of the metal sheet material of said blank container;    c) covering the surface of the metal sheet material of said blank container with a layer of surface coating; and    d) covering said layer of surface coating with a layer of heat insulation coating.    
   
   
       2 . The metal container processing method as claimed in  claim 1 , wherein said step b) removing sharp burrs and dents from the surface of the metal sheet material of said blank container is to apply sodium nitrite solution to the surface of the metal sheet material of said blank container, thereby removing sharp burrs and dents from the surface of the metal sheet material of said blank container.  
   
   
       3 . The metal container processing method as claimed in  claim 1 , wherein said step c) covering the surface of the metal sheet material of said blank container with a layer of surface coating is to coat a layer of phosphorous compound on the surface of the metal sheet material of said blank container.  
   
   
       4 . The metal container processing method as claimed in  claim 1 , wherein said step d) covering said layer of surface coating with a layer of heat insulation coating covering is to coat the surface of said layer of surface coating with a coating material containing Teflon and heat insulating material at the ratio of about 100:25˜35%.