| 摘要 |
PURPOSE:To eliminate the penetration of the solution of adhesion part and to enable the cleaning and re-use of drum can by subjecting the annular gap between closed type drum can drum plate and the inner face of the enfolding- seaming part of the roof to build up welding and by performing seam welding from the outer side of the cylindrical adhesion part of the upper part of the enfolding-seaming part with the bottom plate. CONSTITUTION:The annular gap between the drum plate 1 of closed type drum can and the inner face of the enfolding-seaming part 10 of roof plate 2 is subjected to build up welding 14 from the inner side. A bottom plate 3 is then assembled and seamed 11 with enfolding and the cylindrical seaming part 16 of both plates located on the upper part thereof is subjected to seam welding from the outer side. The penetration into the seaming part of the content solution is prevented, the residual solution is completely eliminated by the cleaning of drum can and the re-use of drum can is made safe. |
