| 摘要 |
The present invention relates to a method for manufacturing a cushion material sheet comprising a number of expandable air bags provided continuously. In the present invention, a cushion material sheet comprising a number of air bags provided continuously and accomodating blown tubes is manufactured in a series of continuous steps. Films (f1, f2) taken out from rolls (1, 2), respectively, and films (F1, F2) taken out from rolls (3, 4), respectively, are superimposed one upon another so as to form one sheet, and the films (f1, f2) are heat-sealed by means of a first mold (6c) at a first operating station (S1) so as to form a main trunk passage (28) and self-sealing type valves (21, 23, 25, 27). At this time, in order to prevent the films (f1, f2 and F1, F2), from being welded together, non-welding sheets (T1, T2) are interposed between the respective films in advance. The films (F1, F2) are heat-sealed on the sides thereof in a second operating station (S2), and the films (F1, F2) are then heat-sealed in a transverse direction at a predetermined interval to thereby continuously form independent air bags (15). <MATH> |
