A film cutting apparatus includes: a punch plate including a first punch protruded on an upper surface and a second punch protruded on a lower surface; a first die plate having a first hole corresponding to the first punch, the first die plate providing a surface on which a film is provided; a second die plate having a second hole corresponding to the second punch, the second die plate providing a surface on which a film is provided; at least two guide bars penetrating the first die plate and the punch plate and fixed to the second die plate; a first elastic member between the first die plate and the punch plate; a second elastic member between the punch plate and the second die plate; and an elevator configured to press the first die plate.

The machine includes a feeding path for the logs to be cut and a cutting head arranged along the feeding path. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes at least a grinding unit, including at least one grinding wheel mounted onto a rotation shaft and co-acting with a side of the disc-shaped cutting blade 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.

The present invention relates to a converting machine, i.e., a machine for winding or unwinding a strip of material on coils, particularly configured to process a delicate material.

In particular, the invention is directed to a machine (1) for converting coils of a material into smaller coils, comprising a loading unit (2) for loading a strip (N) of material into the machine (1), an accumulation unit (3) of the strip (N) being processed, and a winding unit (4) of the strip (N) on a winding shaft (5, 5) to form respective coils (B), characterized in that the winding unit (4) comprises: a revolving disc (29), which supports two winding shafts (5, 5) of coils (B); a feeding roller (30) of the strip (N) to a winding position; a movable accompanying member (31) of the strip (N) and a cutting member (32) operatively associated with said feeding roller (30), wherein the feeding roller (30), the movable accompanying member (31), and the cutting member (32) are placed on a carriage (33), movable horizontally between at least one forward or operating position and a retracted or resting position; and wherein the movable accompanying member (31) and the cutting member (32) are hinged on the axis of the feeding roller (30) and are tiltable between a non-operating position and an operating position adapted to operate the crosswise cut of the strip M.

A system for packaging groups of paper rolls, including a cutting-off machine that cuts paper logs, each group including rolls obtained from a same log. The system includes: a first unit for arranging the individual rolls spaced apart from each other; a second unit forming the groups by grouping a predetermined number of rolls, the second unit being provided with blades adapted to push from the back the last roll of each group to be formed and each formed group as the individual groups are formed by exerting a pushing action on the rear base of said last roll while the front base and a lateral surface of each roll are free; a third unit located downstream of the second unit and adapted to convey the groups towards a packaging machine.

A cutting portion (cutting device) includes a fixed blade that extends in an intersecting direction (X axis direction) intersected with a transport direction transporting a roll paper, and a round blade that cuts the roll paper by relatively moving in the intersecting direction (X axis direction) with respect to the fixed blade in a state of being abutted on the fixed blade, in which the fixed blade extends over a portion of a range where the round blade relatively moves, and the round blade is in a separation state of being separated from the fixed blade in the transport direction when entering a region facing the fixed blade (cutting operation region) from a region not facing the fixed blade (standby region).

Cutting-off machine for the transversal cutting of logs of paper material, comprising: a structure (SC) on which are moved the logs; a cutting unit (CU) with a blade (2); a grinding unit for sharpening the blade; a device for positioning the grinding wheels with respect to the blade (2);
wherein the positioning device comprises a primary carriage (4) and two secondary carriages (42, 43) driven by respective actuators; there is an optical sensor (100) that detects a cutting edge (200) of the blade (2); in a phase of operative positioning of the grinding wheels which involves sharpening the blade following the contact of the grinding wheels with the blade, the abrasive side of the grinding wheels is pushed against the blade with a thrust having a predetermined value.

A cutting mechanism for a roll fiber product comprises two clamping devices for clamping the roll fiber product, and a blade for cutting the roll fiber product. The two clamping devices are respectively connected to a push device. During the cutting process, the push devices drive the clamping devices and the roll fiber product thereon swinging so that the two clamping devices break the roll fiber products to reduce the contact area and the friction between the blade and the roll fiber products. In addition, two clamping devices are respectively connected with a push-pull device for increasing the size of the gap therebetween, so as to prevent the blade from touching the cut roll fiber products. Thus, the cutting mechanism of the present invention is able to reduce the wear rate of the blade, and improve the yield rate of the roll fiber products.

This roll cutter device is provided with roll units in which a thin plate material is passed between a pair of rolls. Three sets of the roll units are provided in an axial direction of the rolls in such a way that central axes of the rolls lie on one straight line in the axial direction. The configuration is such that a plurality of the roll units including an upper roll and a receiving roll exist in the axial direction.

The present disclosure is directed to a method for cutting a coreless rolled paper product. The method includes defining a core offset value for a cut, the cut having a starting point and an ending point, setting a plunge speed for a saw to a first plunge speed, and changing the plunge speed to a second plunge speed when the saw reaches the core offset value.

A bandsaw having a shaped band blade, at least one pair of flywheels (5, 6) arranged to move the shaped band blade; a motor member (7) connected to at least one flywheel of the pair of flywheels; a bench (8) for supporting and feeding at least one object to be cut, wherein the shaped band blade (1) has a band having a variable width between an area (2) of minimum width and an area (3) of maximum width.