Patent ID: 6692602
Filing Date: 2004-02-17
Classification: B05C,B31F,Y10T

Abstract:
A machine for producing a corrugated cardboard sheet, which incorporates at least one corrugated sheet (51) with corrugation crests (52) and at least one liner sheet (53) that is glued to the corrugation crests (52), comprisingat least one corrugating roll (3), which serves to give the corrugated sheet (51) its shape, incorporating a corrugating-roll axis (7) around which the corrugating roll (3) can rotate, a first corrugating-roll end with a first corrugating-roll bearing journal (31), which is mounted in a first corrugating-roll bearing (33), and a second corrugating-roll end with a second corrugating-roll bearing journal (31â€²), which is mounted in a second corrugating-roll bearing (33â€²), a gluing device (13) for applying glue onto the corrugation crests (52) by a glue roll (22) incorporating a glue-roll axis (28), around which the glue roll (22) can rotate, and which extends parallel to the corrugating-roll axis (7), incorporating a first glue-roll end with a first glue-roll bearing journal (25) mounted in a first glue-roll bearing (27), which corresponds to the first corrugating-roll bearing (33), incorporating a second glue-roll end with a second glue-roll bearing journal (25â€²) mounted in a second glue-roll bearing (27â€²), which corresponds to the second corrugated-roll bearing (33â€²), delimiting, between itself and the corrugating roll (3), a glue gap (30) of a width B, and advanceable towards the corrugating roll (3) for adjusting the width B of the glue gap (30), and a calibration device (37) for adjusting the width B of the glue gap (30) having at least one contact-pressure unit (38, 38â€²) for pressing a glue-roll bearing (27, 27â€²) against the corresponding corrugating-roll bearing (33, 33â€²) with a contact-pressure force A, at least one force-measuring unit (41, 41â€²) for measuring a force of a bearing contact pressure P between the pressed-on glue-roll bearing (27, 27â€²) and the corresponding corrugating-roll bearing (33, 33â€²), at least one adjusting unit (42, 42â€²) for adjusting a bearing distance L between a pressed-on glue-roll bearing (27, 27â€²) and the corresponding corrugating-roll bearing (33, 33â€²), and at least one control unit (49, 49â€²), which is connected to the at least one force-measuring unit (41, 41â€²) and the at least one adjusting unit (42, 42â€²) for the transfer of signals, and which activates the at least one adjusting unit (42, 42â€²) in such a way that at least one bearing distance L is reduced, until the force of the bearing contact pressure P decreases based on the glue roll (22) and the corrugating roll (3) coming into contact with one another.