| 摘要 |
A roof tile patterned plate 15 ia manufactured by first pre-profiling a plastic covered plate by roll forming, and then providing this plate with cross-running steps 22,23 in a machine having two pairs of tools 11, 12 resp. 13, 14 from which one is vertically movable, i.e. perpendicularly to the plane of the plate, to give a shaping motion. The tool pairs define slots for the pre-formed plate so that the plate preferably gets no holding force what so ever but may be freely drawn in into the tool pairs during the forming motion of the movable tool pair 13, 14. A stop 16 prevents the plate from being drawn in into the movable tool pair 13, 14 during the end phase of the forming motion so as to thereby define the distance between the steps. The forming is lenient to the plate and gives a neat result with an accurate distance between the steps. <IMAGE> |
