Abstract:
The converting line for processing tissue paper comprises: - an unwinder (3, 5) for unwinding reels (B1-B4) of tissue paper; - a rewinding machine (23) for forming rolls (R) of tissue paper; - a feeding path between the unwinder and the rewinding machine, for at least one ply (V1-V4) of tissue paper; - along the feeding path, a first detection unit (31) to detect the thickness of the tissue paper fed along the feeding path in a feeding direction; - a control system (33 ), interfacing with the detection unit (31) and configured to act on at least one production parameter of the converting line based on the detected tissue paper thickness.
Abstract:
The machine comprises a feeding path for the logs to be cut (L) and a cutting head (5) arranged along the feeding path. The cutting head comprises a coupling (35) for a disc-shaped cutting blade (9) and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof (B-B) and a cyclic movement to cut the logs (L) into single rolls (R), and to allow the logs to move forward along the feeding path. The machine also comprises at least a grinding unit (31, 33), comprising at least one grinding wheel (10) mounted onto a rotation shaft (103) and co-acting with a side of the disc-shaped cutting blade (9) to grind the cutting edge of the same disc-shaped cutting blade. A controlled approach system is also provided, to move the grinding wheel towards the disc- shaped cutting blade.
Abstract:
The rewinding machine comprises a first winding cradle formed be- tween a first winding roller (1), a second winding roller (3) and a third winding roller (7). The first winding roller and the second winding roller define a nip (5) through which there pass the winding cores (A) with the web material (N) being wound around them;The rewinding machine also comprises a feed path of the winding cores that pass between the first winding roller (1) and the third winding roller (7). A second winding cradle is formed between the first winding roller (1), the second winding roller (3) and a fourth winding roller (8). The rewinding ma- chine also comprises a rolling surface (19) extending around the first winding roller (1) and defining a feed channel (21) of the winding cores.
Abstract:
The device (3; 201; 202) with rotating blades comprises a support structure (17; 217). The structure supports a rotating blade -holder (15; 15B; 203; 205), which rotates around a rotation axis and on which a group of rotating blades (19; 19B; 203A; 205A) is arranged. An anvil blade (21; 21B; 21C; 204; 206) is further provided carried on the support structure (17; 217) adapted to co-act with said group of rotating blades (19; 19B; 203A; 205A). A sensor (31; 104; 105; 107; 231; 232) detects a parameter indicative of a mutual interaction between the group of rotating blades (19; 19B; 203A; 205A) and the anvil blade (21; 21B; 21C; 204; 206).
Abstract:
The cutting machine (1) for cutting logs (L) of web material, comprises a cutting head (5) arranged along the feeding path of the logs (L). The cutting head (5) comprises a coupling for a disc-shaped cutting blade (9) and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof (B- B) and a cyclic movement to cut the logs (L) into single rolls (R), and to allow the logs to move forward along the feeding path. The machine also comprises a store unit (73) for disc-shaped cutting blades (9A-9E) associated with the cutting head (5). A handling member (71) is provided to remove a worn disc-shaped cutting blade (9A-9E) from the cutting head (5) and replace the worn disc-shaped cutting blade with a new disc-shaped cutting blade (9A-9E) taken from the store unit (73).
Abstract:
The folding roller (9; 11) comprises a rotation axis (9A; 11A) and at least a gripping member (15; 17) extending longitudinally along the folding roller (9; 11), controlled by at least a piezoelectric actuator (331). The piezoelectric actuator (331) causes a pivoting movement of the gripping member (9; 11) about its pivoting axis (319A) parallel to the rotation axis (9A, 11 A) of the folding roller (9; 11).
Abstract:
The embossing-laminating device (1) comprises load bearing structure with at least two side members (203), a first path, for a first ply (V1) of web material, and a second path for a second ply (V2) of web material. Along the first path, a first pressure roller (211) and a first interchangeable embossing roller (207) are arranged, which define therebetween a first embossing nip (215) for the first ply (V1) of web material. Along the second path a second pressure roller (213) and a second interchangeable embossing roller (209) are arranged, which define a second embossing nip (219) for the second ply (V2) of web material. The embossing-laminating device also comprises a magazine (245) comprising a plurality of seats (249A-249E) for a plurality of interchangeable embossing rollers, as well as at least a first manipulator (241) for replacing embossing rollers.
Abstract:
The rewinding machine comprises a first winding cradle, formed between a first winding roller (1), a second winding roller (3) and a third winding roller (7), and a second winding cradle formed between the first winding roller (1), the second winding roller (3) and a fourth winding roller (8). The first winding roller (1) and the second winding roller (3) define a nip (5) through which nip the winding cores, around which the web material is found, pass and the web material is fed towards a roll being formed in the second winding cradle. A severing member (24) is furthermore provided, acting on the web material (N) between a winding core (A) and the nip (5), to sever the web material thus generating a tail edge (Lf) of a completed roll and a leading edge (Li) of a new roll to be wound.
Abstract:
The machine comprises a first winding roller (3) and a concave plate (17) extending around the first winding roller (3). The first winding roller and the concave plate define a feed channel (19) of the web material (N). Upstream of the concave plate (17) there is arranged a moving member (21) comprising a pinching surface (23B) cooperating with the first winding roller (3) to pinch the web material (N) against the first winding roller (3). The moving member (21) is arranged and controlled to pinch the web material (N) against the surface of the first winding roller (3) and decelerate the web material between the moving member (21) and the surface of the first winding roller (3), causing a leading edge (LT) to wind around itself to form a winding nucleus of a log (L; L1).
Abstract:
A rewinding machine (2) is described with a winding cradle defined by three rollers (1, 3, 7) and comprising a fourth winding roller 21, defining with the first winding roller (1) a cradle in which the web material (N) is pushed by a winding core (A2) to the beginning of each winding cycle, to cause severing of the web material without the need for controlled mechanical parts.