| 摘要 |
A filter manufacturing machine includes a forming device (3) for forming filter tow (5) into a hollow rod-shaped continuous filter body, a forming tube (12) included in the forming device (3) and having a tubular forming path (2) through which the filter tow (5) is passed while being brought together, a mandrel (13) arranged in the forming tube (12) and forming the tubular forming path (2) in cooperation with the forming tube (12), and a heat treating section (17) included in the forming tube (12) and configured to heat the filter tow (5) while the filter tow passes through the tubular forming path (2). The mandrel (13) has a small-diameter portion (13a) located at the inlet of the forming tube (12), a large-diameter portion (13b) located at the outlet of the forming tube (12), and a diameter expansion portion (6) located between the small-and large-diameter portions (13a, 13b). The diameter expansion portion (6) is located downstream of the heat treating section (17) as viewed in the moving direction of the filter tow (5). |
