Calendering machine having a working roller with multiple backing rollers

The calendering machine (1) according to any one of the preceding claims, characterized in that the bearing zones (C11, C12) of the two backing rolls (11, 12) associated with the first work roll (10) are angularly spaced from each other, about the first axis (Y10), by a first bearing spacing angle (a10) which is within the range of 30 to 120 degrees, preferably within the range of 60 to 100 degrees.

The calendering machine (1) according to any one of the preceding claims, characterized in that the bearing zones (C11, C12) of the two backing rolls (11, 12) associated with the first work roll (10) are arranged symmetrically with respect to each other on either side of a work plane (PYZ) comprising the first axis (Y10) and the second axis (Y20), and in that the bisector (B10) of the first bearing spacing angle (a10) has a direction which is inclined downstream away from the running plane (PXY).

The calendering machine (1) according to any one of the preceding claims, characterized in that the upstream backing roll (11) associated with the first work roll (10) has an external diameter (DE11) which is less than the external diameter (DE12) of the downstream backing roll (12) associated with the first work roll (10).

The calendering machine (1) according to any one of the preceding claims, characterized in that the calendering machine (1) includes, associated with the second work roll (20), two backing rolls (21, 22), respectively upstream (21) and downstream (22), which are parallel to each other, which are parallel to the second work roll (20) and which each bear against the second work roll (20), each at a bearing zone (C21, C22), respectively upstream (C21) and downstream (C22), arranged on a side of the second work roll (20) which is opposite the calendering gap (30) relative to the second axis (Y20).

The calendering machine (1) according to any one of the preceding claims, characterized in that a considered work roll (10, 20) is movable relative to the associated backing group between a relative closed position in which the considered work roll (10, 20) and the two backing rolls (11, 12, 21, 22) associated with the considered work roll (10, 20) are in a relative contact position, and a relative spaced-apart position in which the considered work roll (10, 20) and the two backing rolls (11, 12, 21, 22) associated with the considered work roll (10, 20) are in a relative spaced-apart position.

A method for calendering a strip (4) to be calendered, of the type in which the strip (4) is caused to run, in a running plane (PXY) along a running direction (X) from upstream to downstream, through a calendering gap (30) defined between a first work roll (10) rotating about a first axis (Y10) and a second work roll (20) rotating about a second axis (Y20) parallel to the first axis (Y10), the two work rolls (10, 20) being counter-rotating,

• characterized in that the method includes the application, on the first work roll (10), of at least two backing rolls (11, 12), respectively upstream (11) and downstream (12), which are parallel to each other, which are parallel to the first work roll (10) and which each bear against the first work roll (10), each at a bearing zone (C11, C12), respectively upstream (C11) and downstream (C12), both arranged on a side of the first work roll (10) which is opposite the calendering gap with respect to the first axis (Y10).