| 摘要 |
Rotatable roll comprising an inner tube (1) and preferably an outer tube (2), being arranged in parallel and coaxially with the inner tube, at least two generally radial end plates or intermediate plates (8, 11) being placed between these tubes, said outer tube (2) comprising a fixed tubular shell (3) and a movable tubular shell (4), the curved surfaces of which are of approximately equal size, said movable tubular shell (4) being pivotable round a spear (5), which is connected with the fixed tubular shell and preferably follows a course in parallel with the longitudinal axis of the roll, so that the outer tube (2) is openable and closable along a surface of cut (6), preferably in the longitudinal direction of the roll, the roll further comprising a control system for the opening and closing of the outer tube. The roll is used in the manufacture of hollow objects, especially packing containers, of cardboard and the like, and it makes release of the object from the roll following the manufacture much easier. The roll can also be used, when securing and centering objects in general. A control system comprising two fixed beams (15, 16) and an intermediate beam (17), being connected with the fixed beams by means of chain links (22, 23), is preferred. During the manufacture of machining of the object, the outer tube is locked in a position, in which a slight slit is established between the two tubular shells, and when the object is to be released from the roll, the shells are pushed closer together via an actuation of the intermediate beam, the chain links thereby promoting a pulling together of the two tubular shells. |
