| 摘要 |
PURPOSE:To mold a multi-layer bellows without using an intermediate member and to separate the respective bellows easily by giving a spiral shape to each of the bellows composing multi-layer bellows. CONSTITUTION:First of all, in a pipe stock 1 for an external layer and a pipe stock 2 for an internal layer which are raw material of the multi-layer bellows B, one end of each pipe is inserted respectively into each of the groove parts 13a, 13b of an end supporter 13. Simultaneously, it is fixed at one end side and anti--swivelled by fitting an anti-swivel pin 11. In addition, a mandrel 8 is inserted from the other end into the pipe stock for the internal layer 2, and the other end of each pipe stock is inserted into each of the grooves 7a, 7b of a supporting fitment 7, fixed and simultaneously anti-swivelled by fitting an anti-swivel pin 9.
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