| 摘要 |
FIELD: plastic working of metals. ^ SUBSTANCE: method comprises steps of making shell, upper bottom, mouth, lower bottom and joining all parts by welding; forming lower bottom as one piece with backing flanged ring; inserting lower bottom into shell along backing ring until flange rests upon shell; butt welding shell and lower bottom on backing ring. ^ EFFECT: enhanced centering due to accurately inserting lower bottom to shell, improved quality of welded seam of lower bottom and shell, lowered labor consumption for making bottle. ^ 1 dwg, 1 ex |
