| 摘要 |
An apparatus (14) for continuously producing corrugations in an extruded plastic web (2) includes a master roller (22) and at least one auxiliary roller (24). Each roller is mounted rotatably about its central axis. A first set of interchangeable, elongated profiled inserts (28) are attachable around, and projecting from, the master roller (22), while a second set of interchangeable, elongated, profiled inserts (28') are attachable around, and projecting from, the first auxiliary roller (24). The two sets of inserts (22, 22') are configured such that, when the master roller (22) and the auxiliary roller (24) turn synchronously in opposite directions, the rollers and the first and second sets of inserts cooperate to define and advancing corrugated profile. Also described are various forms of the resulting web, and method for constructing a roof using such web.
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