| 摘要 |
A folding unit for corrugated board sheets (18) in in-line manufacturing of corrugated board boxes, comprising a pair of parallel and laterally displaceable folding beams (1, 2) with a respective endless conveyor belt (3, 4) , which extend from the inlet (19) of the folding unit to a pair of rolls (14) at the outlet (20) of the folding unit. A pair of folding rules (6) are arranged under the respective folding beams (1, 2) and extend from the inlet (19) of the folding unit and towards, but not all the way to, the outlet (20) of the folding unit. A pair of folding bars (33, 34) which are fixedly positioned outside the respective folding rules (6) and at an angle to the respective folding rules are arranged in the front portion of the folding unit, as seen in the transport direction (15) of the corrugated board sheets (18). A pair of folding belts (7, 8) are arranged under a respective folding beam (1, 2) to cooperate therewith and extend from an associated front deflecting roller (16) after the terminal end of the folding bars (33, 34), as seen in the transport direction (15), to an associated deflecting roller (17) with a horizontal axis substantially adjacent the pair of rolls (14). A post-creaser (81) is positioned under the respective folding beams (1, 2), between the rear end of each folding rule (6), as seen in the transport direction (15) , and the associated front deflecting roller (16) . Each post-creaser comprises a creasing wheel (82) which is formed as a double-cone and which is rotatably arranged on an adjustable bracket (83) to deform, in cooperation with the associated folding beam (1, 2) and an abutment (90), the beads (75, 76) forming at the folding line (74) as the corrugated board sheet (18) is being folded. |
