| 摘要 |
<p>A cell tube (1), wherein the thickness (t1) of a side peripheral wall (1a) is formed so as to be t1=αt0 (α=0.2 to 0.7) against the thickness (t0) of a bottom wall (1b) through an ironing step where dies (11, 12, 13) disposed in multiple stages are used and the internal surface of the side peripheral wall is formed in a rough surface of 0.2 to 2.0 µm in averaged surface roughness through a drawing step after the ironing step; the method of manufacturing the cell tube, comprising the first step of manufacturing a cell tube raw body (7) by applying DI processing to a cup-shaped intermediate product (4) and the second step of manufacturing the cell tube by drawing the cell tube raw body by the drawing dies (18, 19) disposed in multiple stages so as to reduce the outside diameter of the raw body to a specified outside diameter (r) without changing the thickness of the side peripheral wall.</p> |
