EP2429782A1

EP2429782A1 - Waste ejection unit with easy tool changing for a machine for producing packaging

Info

Publication number: EP2429782A1
Application number: EP10721979A
Authority: EP
Inventors: Giovanni Compagnone; Glenn Corminboeuf
Original assignee: Bobst SA
Current assignee: Bobst Mex SA
Priority date: 2009-05-13
Filing date: 2010-05-12
Publication date: 2012-03-21
Anticipated expiration: 2030-05-12
Also published as: CN102413993B; CN102413993A; JP5580884B2; WO2010130429A1; US20120055301A1; US8783144B2; JP2012526009A; KR101419989B1; KR20120013395A; ES2587203T3; EP2429782B1

Abstract

The invention relates to a waste ejection unit in a machine (1) for producing packaging, positioned downstream from a cutting unit (3) for cutting one or more flat substrates (4), including a frame (16) and two mutually engaging rotary tools (17, 18), at least one of the two tools (17, 18) being formed with a mandrel (27) and a removable sleeve (28), and capable of being inserted (I), locked and rotated by the mandrel (27).

Description

DΕJECTION WASTE UNIT CHANGE OF FACILITY ¹ TOOL FOR MACHINE PACKAGING PRODUCTION

The present invention relates to a waste ejection unit obtained by cutting a plane support. The invention also relates to a waste ejection unit for facilitating any change of ejection tool. The invention also relates to a packaging production machine comprising, in order and successively, a cutting unit and a waste ejection unit.

A packaging production machine is intended for the manufacture of boxes, which will form packaging, after folding and gluing. In this machine, an initial planar support, such as a continuous strip of cardboard, is unwound and printed by a printing unit, itself constituted of subunits in the form of printing units. The web is then transferred to a cutting unit.

After cutting, the poses obtained have areas of waste that are separated and eliminated in a waste ejection unit, so that can then create boxes. The poses are then separated to obtain individualized boxes in a separator. The ejection unit of this waste is mounted following the cutting unit.

The ejection unit ensures precise and fast ejection of waste. The accuracy of operation of the ejection unit also prevents the waste from causing jams.

The ejection unit comprises two tools, in the form of two rotating cylinders, positioned parallel to one another, so as to cooperate with each other. The poses circulate between the two cylinders in a substantially horizontal trajectory.

One of the tools or cylinders, the lower cylinder, has radial needles that sink into each waste. The needles separate the waste from the installation by driving them with the rotation of the needle cylinder. This waste is then released from these radial needles during the rotation of the cylinders. Ejectors in the form of fixed combs are arranged parallel to the cylinders. The radial needles are thus released and will sink into other waste during their next passage in the cutting area of the next pose.

The other of the tools or cylinders, the upper cylinder, has on its surface either strips of a flexible material, for example foam, arranged in successive and spaced rings, or a single strip forming a complete coating of a flexible material, for example example of vulcanized rubber type. Holes are drilled in the cylinder outside the foam strips or in the vulcanization layer, depending on the version. The position of the holes corresponds to that of the needles. The latter are housed in the holes during the rotation of the two cylinders, so as to pierce the waste. The upper cylinder ensures the transport of the poses and their maintenance during the sewing of the waste.

State of the art

US-2,899,871 and EP-1,057,596 provide examples of cut waste ejection systems. However, the operations of change of ejection cylinders prove to be long and tedious. Users want to make extremely fast changes of work by modifying the ejection cylinders, in order to cope with the increasingly specific requests for printing and cutting small series of their customers. First, the operator mechanically disconnects the needle-carrying cylinder, to remove it from its drive mechanism. Then the operator pulls the cylinder out of the ejection unit, and out of the machine. Then, the operator precisely implants the ejection needles one after the other in holes made in the surface of a new cylinder, according to a diagram representing the pose. Finally, the operator places the new cylinder in the ejection unit by reconnecting it to its drive.

The weight of a cylinder is from 30 kg to 50 kg, or up to 900 kg in the case of a lower needle cylinder associated with an upper cylinder with cutting knives. To pull it out, the operator raises it with a hoist. Due to the rather high weight, a cylinder change is not very quick to perform. Work changes and so tool changes are needed to get many different boxes. Frequent manipulations of the cylinders are thus long and tedious. The spiked cylinder represents a danger of injury to the operator. However, this ready-to-use cylinder must be manipulated to be placed back in the waste ejection unit.

Presentation of the invention

A main object of the present invention is to develop a waste ejection unit positioned downstream of a cutting unit for a packaging machine. A second objective is to provide a waste ejection unit for preparing the ejection tool or tools outside the machine. A third objective is to simplify and facilitate any change of one or more ejection tools. A fourth objective is still to obtain a waste ejection avoiding the problems of the state of the art. Another objective is to provide a packaging production machine with an integrated waste ejection unit following an upstream cutting unit and having a great flexibility of use.

In a first aspect, the present invention relates to a waste ejection unit in a packaging production machine, which is positioned downstream of a cutting unit for cutting one or more planar supports. The unit comprises a frame and two rotary tools cooperating with each other. At least one of the two tools is formed with a mandrel and a removable sleeve, adapted to be inserted and retracted, locked and rotated by the mandrel.

In other words, with the replacement of a removable sleeve carrying a series of needles or at least one strip of flexible material by another removable sleeve carrying another series of needles or at least one other band of flexible material, the change of work is done in a very short time. A lower sleeve with a lower mandrel forms the lower tool and / or an upper sleeve with an upper mandrel forms the upper tool. Both tools are inexpensive and require a maximum of two sleeves. For example, the weight of a removable sleeve is less than 18 kg, this weight to be compared with that of a complete tool.

In a second aspect of the invention, a packaging production machine is characterized in that it comprises the waste ejection unit having one or more several of the technical features described below and claimed, positioned downstream of a cutting unit.

The upstream and downstream directions are defined with reference to the direction of movement of the support, in the longitudinal direction in the waste ejection unit and in the whole of the packaging production machine. The longitudinal direction is defined by referring to the direction of movement of the planar support in the waste ejection unit and in the machine, along its median longitudinal axis. The transverse direction is defined as the direction perpendicular to the direction of movement of the plane support. The front and rear positions are defined relative to the transverse direction as being respectively the driver's side and the driver's opposite side.

In another aspect, the invention relates to a sleeve for a waste ejection unit. The waste ejection unit is positioned downstream of a cutting unit for cutting one or more planar supports in a packaging production machine. The sleeve is adapted to be locked and to be rotated by a mandrel, so as to form a rotary tool. This rotary tool is adapted to cooperate with another rotary tool provided with at least one strip of a flexible material. The sleeve has a wall with an outer surface, provided with waste ejecting needles, engaged in the wall and protruding radially outwardly from the outer surface.

In yet another aspect, the present invention relates to a sleeve for a waste ejection unit, positioned downstream of a cutting unit for cutting one or more planar supports in a packaging production machine. , able to be locked and to be rotated by a mandrel, so as to form a rotary tool, adapted to cooperate with a rotary tool provided with waste ejection needles, and having a wall with an outer surface, provided with at least one strip of flexible material protruding radially outwardly from the outer surface.

With the invention, the user only needs a minimum of infrastructure for storing the sleeves, the adaptation of the sleeves by drilling and implantation needles, and thus the manufacture of tools.

According to yet another aspect of the invention, a waste ejection cassette for a waste ejection unit is positioned downstream of a cutting unit. for cutting one or more planar supports in a packaging production machine. The waste ejection cassette comprises a frame provided with bearings, carrying two rotary tools cooperating with each other. One of the tools has waste ejecting needles protruding radially outward. The other tool is provided with at least one strip of a flexible material projecting radially outwardly. At least one of the two tools is formed with a mandrel and a removable sleeve, adapted to be inserted and removed, locked and rotated by the mandrel.

With one or two sleeves and the waste ejection cassette, access, assembly and disassembly are facilitated for the operator providing adjustments and maintenance of the unit and the machine. With a more ergonomic ejection unit, the risk of misplacement of needles is greatly reduced, which consequently leads to a reduction in poses and boxes that are non-compliant or do not have optimal quality.

Brief description of the drawings

The invention will be better understood and its various advantages and different characteristics will become more apparent in the following description, of the nonlimiting exemplary embodiment, with reference to the appended diagrammatic drawings, in which:

FIG. 1 represents a synoptic side view of a packaging production machine equipped with a waste ejection unit;

- Figure 2 shows a perspective view of a waste ejection cassette, according to the invention, with a sleeve of one of the two tools in the extended position;

- Figure 3 shows a perspective view of a waste ejection cassette, according to a second embodiment;

4 to 7 show partial perspective views of the front face of the cassette of FIG. 2, showing the different steps of introducing a sleeve to form the ejection tool; and

- Figures 8 and 9 show a longitudinal sectional view of a waste ejection tool, according to a first form and a second embodiment. Detailed description of preferred embodiments

As illustrated in Figure 1, a packaging production machine (1) processes a carrier or continuous web material (2), which in this case is flat carton. The machine (1) comprises a processing unit, for example a platen cutting press (3). Upstream of the press (3), the machine (1) can have units such as printing units, means for quality control and register, embossing groups, etc. (not shown)

The band (2) enters the press (3) by its transverse side upstream. The press

(3) cuts the strip (2) and delivers the support in the form of poses (4), in cardboard. The poses (4) exit the press (3) by its transverse side downstream. The direction of advance or scrolling (Arrows F) of the strip (2) and the poses (4) in the longitudinal direction indicates the upstream direction and the downstream direction.

The machine (1) comprises a drive arrangement (6) which is arranged downstream of the press (3). This arrangement (6) firstly comprises a lower drive roller (7) driven in rotation by motor. The arrangement (6) then comprises a single or a series of pressure rollers (8) disposed above bearing against the roller (7). The poses (4) are engaged, held and driven between the roller (7) and the roller or rollers (8). The arrangement (6) ensures an active transfer of the poses

(4), so as to release the poses (4), successively one after the other, out of the press (3), in the longitudinal direction (F), from upstream to downstream.

The machine (1) comprises a transfer device (9) for the poses (4). The device (9) is intended to pass the poses (4), successively one after the other, from the arrangement (6), downstream, in the longitudinal direction

(F). The machine (1) comprises a first transport assembly, which is more specifically a first vacuum transport (11), and which is arranged downstream of the transfer device (9). This first vacuum transport (11) comprises a conveyor with one or more endless belts with orifices (12). A vacuum box (13), connected to a vacuum source, plates the poses (4) against the belt (12). The poses (4) are arranged, one after the other, with a short interval between them on the upper face of the belt (12). The first vacuum transport (11) ensures an active transfer of the poses (4). The belt (12) drives the poses (4), in the longitudinal direction (F), from upstream to downstream. The machine (1) then comprises a waste ejection unit (14), which is placed downstream of the press (3) and after the first vacuum transport (11). This unit (14) makes it possible to eliminate in a controlled manner cardboard waste which is pre-cut in the poses (4). The waste ejection unit (14) comprises a support structure or a frame

(16). Favorably, the unit (14) may comprise the first transport assembly, i.e. the first vacuum transport (11), for the poses (4). The frame (16) is dimensioned so that the transfer device (9) and this first vacuum transport (11) can advantageously be mounted thereon. The central portion of the unit (14) includes a first cylindrical lower rotary tool (17) cooperating with a second cylindrical upper rotary tool (18). The two tools (17 and 18) are mounted parallel to each other, one above the other, and transversely to the frame (16), and thus to the unit (14). The first transport assembly, i.e. the first vacuum transport (11), can be placed upstream of the two rotary tools (17 and 18).

As can be seen in Figures 8 and 9, the lower tool (17) is provided with radial needles (19) projecting radially towards the upper tool (18). These needles (19) are suitably positioned on the surface of the lower tool (17) where the cutting of the strip (2) produces waste. Thus, these needles (19) are pricked in each of the waste areas, so as to eliminate them with the help of combs mounted near the lower tool (17).

As shown in Figures 2 and 5, the upper tool (18) is provided with a series of foam strips (20) projecting radially toward the lower tool (17). These strips (20) are positioned on the surface of the upper tool (18) where there are no corresponding needles (19) for the lower tool (17).

The machine (1) comprises a second transport assembly, which is more specifically a second vacuum transport (21), and which is disposed downstream of the waste ejection unit (14). The second transport assembly (21) is substantially similar to the first transport assembly (11), with endless ported belts (12) and a vacuum box (13).

The unit (14) may comprise this second transport assembly for the poses (4), ie the second vacuum transport (21). This second vacuum transport (21) can be placed downstream of the two rotary tools (17 and 18). The second transport assembly (21) can be mounted in the frame (16).

The machine (1) then comprises a separator (not shown), which is disposed downstream of the waste ejection unit (14), after the second transport assembly (21). The attachment points present on the poses (4) and between the boxes are broken thanks to the separator, and the poses (4) are thus transformed into boxes.

The waste ejection unit (14) may advantageously comprise a removable cassette (22), visible in Figures 2 to 7. The removable cassette (22) may have a supporting structure or frame (23). The unit (14) may comprise a lower front bearing (24) and a lower rear bearing for the first tool, ie the lower tool (17), and an upper front bearing (26) and an upper rear bearing for the second tool, ie the upper tool (18). The two lower and upper bearings (24 and 26), respectively carrying the two lower and upper tools (17 and 18) while ensuring their rotation, are inserted at the frame (23). The removable cassette (22) can be adapted to be inserted into the frame (16), to be fixed to the frame (16) and to be extracted from this frame (16). The cassette (22) enters laterally into a transverse housing formed in the frame (16), between the first (11) and the second transport assembly (21). The cassette (22) is placed on a carriage, the operator makes it fit into its housing by sliding it transversely and the operator ensures its locking to the frame (16). The movement is reversed when the operator moves the cassette (22) out of the unit (14).

The unit (14) may include adjustment means for adjusting a transverse position of the removable cassette (22) in the frame (16). This adjustment is used to adjust or correct the lateral register with regard to the sewing by the needles (19) of the waste in the poses (4).

According to the invention, the waste ejection unit (14) comprises at least one of the two tools, the lower tool (17) and / or the upper tool (18), formed with a mandrel (27) and a removable sleeve (28). The sleeve (28) is insertable (arrow I in FIGS. 2 and 5) or retracted (arrow O in FIG. 5), locked and driven in rotation by the mandrel (27).

The mandrel (27) is formed with a central body (29), a front spigot (31) and a rear spigot (32), forming a rotational shaft of the tool (17 and 18). The front and rear trunnions (31 and 32) are respectively held by the front and rear bearings (24 and 26). To ensure the rotation of the lower tool (17) and the upper tool (18), the rear trunnion (32), respectively of the lower tool (17) or the upper tool (18), is integral. to a rear gear. This rear gear meshes with a pinion of an electric motor drive (not visible), when the cassette (22) is engaged in 1 unit (14).

To change sleeve (28), the operator exits the old sleeve (28), by sliding (O) on the mandrel (27). Then by a reverse movement, the operator returns the new sleeve (28), by sliding (I) on the mandrel (27).

In a particularly advantageous manner (FIGS. 8 and 9) for the lower tool (17), the sleeve (28, 28a and 28b) may have a wall (33a and 33b) with an outer surface provided with waste ejection needles ( 19). These ejection needles (19) can be engaged in the wall (33a and 33b) of this sleeve (28). These needles (19) can protrude radially and outward outwardly from the outer surface of the wall (33a and 33b) of the sleeve (28). Particularly advantageously (FIGS. 2 and 5) for the upper tool

(18), the sleeve (28) may have a wall (33) with an outer surface provided with at least one strip, in this case eight strips, of a flexible material (20). These strips may protrude radially outwardly from the outer surface of the sleeve (28). The sleeve (28) should be firmly held on the mandrel (27). To do this, and in a first preferred embodiment (see Figure 8), the tool (17a) may comprise a first removable end piece, and located at the front (34). The front end piece (34) forms the front spigot (31). This front end piece (34) is coaxial and frustoconical, thus having a rear inclined face, complementary to a front inclined face of the sleeve (28a). The front end piece (34) is screwed onto the body (29a) of the mandrel (27).

In the first embodiment, the tool (17a) may comprise a second fixed opposite rear end piece (36). The rear end piece (36) forms the rear trunnion (32). This rear end piece (36) is coaxial and frustoconical, thus having a front inclined face complementary to a rear inclined face of the sleeve (28a). The rear end piece (36) is secured to the body (29a) and the rear spigot (32) of the mandrel (27).

The front end piece (34), forming a counter-cone, can come to push (Arrows T) the sleeve (28a) against the rear end piece (36), forming a cone. The thrust (T) of the front end piece (34) is made so as to lock this sleeve (28a) on the mandrel (27).

In a second embodiment (see Figure 9), the tool (17b) may comprise a supply channel (37) of pressurized fluid, here compressed air. The channel (37) passes through the rear trunnion (32) and is connected to a source of pressurized fluid. The body (29b) of the mandrel (27) has a cylinder attached to the front spigot (31) and the rear spigot (32). The barrel of the body (29b) is pierced and passes the fluid. The pressurized fluid passing through the channel (37) can put the wall (33b) of the sleeve (28b) under pressure. The wall (33b) of the sleeve (28b) expands slightly to release this sleeve (28b) from the body (29b). When the pressure is cut, the sleeve (28b) is blocked on the body (29b).

The tool (17 and 18) with its removable sleeve (28) must be rotatable while being held by its bearing. To do this, the front bearing (24 and 26), respectively of the lower tool (17) and of the upper tool (18), may preferably be movable between a position that can allow the sleeve (28) to be extracted and a position that can hold the sleeve (28), and vice versa.

The unit (14), and more particularly the cassette (22), may favorably comprise a lower arm (38) carrying the lower front bearing (24), and an upper arm (39) carrying the upper front bearing (26). ). The two arms, lower and upper, (38 and 39) are square-shaped, similar to a lock. The arms (38 and 39) are provided at the front face (41) of the cassette (22), and are positioned parallel to this front face (41). The lower front bearing (24) can be inserted at one end of the lower arm (38), and the upper front bearing (26) can be inserted at a first end of the upper arm (39). The two lower and upper arms (38 and 39) comprise a fixing bearing (42) in their central region forming the right angle.

The cassette (22) has a lower pivot (43) and an upper pivot (44) extending from the front (41) towards the front of the cassette (22) and the unit (14). . The lower arm (38) is mounted on the lower pivot (43), and the upper arm (39) is mounted on the upper pivot (44) by their respective mounting bearing (42).

The lower pivot (43) and the upper pivot (44) form a slide and the bearings fastening means (42) form a slider. With this, the two lower and upper arms (38 and 39) can slide transversely back and forth, and vice versa from back to front (arrows S in Figures 7 and 8). The sliding (S) of the two arms (38 and 39) can make it possible to pass from a position that can lock the rotation shaft, ie the trunnion (31) of the mandrel (27), of the tool (17 and 18) at a position that can release this rotation shaft, ie the trunnion (31) of the mandrel (27), of this tool (17 and 18), and vice versa.

Sliding the lower arm (38) from the rear to the front mechanically disconnects and pulls the lower front bearing (24) from the front pin (31) of the lower tool (17). The sliding of the lower arm (38), from front to rear, allows to mechanically connect and retract the lower front bearing (24) of the front pin (31) of the lower tool (17).

The sliding (S) of the upper arm (39), from the rear to the front (see Figure 8), allows to mechanically disconnect and pull out the upper front bearing (26) of the front pin (31) of the upper tool (18). The sliding (S) of the upper arm (39), from front to rear (see Figure 7), allows to mechanically connect and retract the upper front bearing (26) of the front pin (31) of the upper tool (18).

The lower pivot (43) and the upper pivot (44) also form a tilting axis for the fixing bearings (42). With this, the two lower and upper arms (38 and 39) can rotate. Rotations are only possible if the slides (S) of the arm or arms (38 and 39) have taken place in advance, in order to disconnect the bearing or bearings (24 and 26).

The lower arm (38) pivots from top to bottom, and vice versa from bottom to top. The upper arm (39) pivots from bottom to top, and vice versa from top to bottom (Arrows R in Figures 6 and 7). The rotation (R) of the two arms (38 and 39) can make it possible to pass from a position that can lock the rotation shaft, ie the trunnion (31), of the tool (17 and 18), to a position that can to release this shaft of rotation, ie the trunnion (31), of this tool (17 and 18), and vice versa. The rotation of the lower arm (38), from top to bottom, frees the space in front of the sleeve (28), so that the same sleeve (28) can then be pulled out (O) by sliding it on the mandrel (27) of the lower tool (17). Conversely, the rotation of the lower arm (38), from bottom to top, makes it possible to position the lower front bearing (24) facing the front pin (31) of the lower tool (17).

The rotation (R) of the upper arm (39), from the bottom to the top (see Figure 7), makes it possible to release the space in front of the sleeve (28) so that it can then be pulled out (O). sleeve (28) by sliding it on the mandrel (27) of the upper tool (18). Conversely, the rotation (R) of the upper arm (39), from top to bottom (see Figure 6), makes it possible to position the upper front bearing (26) facing the front spigot of the upper tool (18). .

For the waste ejection cassette according to a second variant embodiment (see FIG. 3), the rotation of the lower arm (38), from top to bottom, makes it possible to release the space lying in front of the sleeve, in order to can then make out the same sleeve by sliding on the mandrel of the lower tool (17). Conversely, the rotation of the lower arm (38), from the bottom to the top, makes it possible to position the lower front bearing (24) facing the front pin (31) of the lower tool (17).

In this second variant embodiment, the rotation (R) of the upper arm (39), from top to bottom, makes it possible to release the space lying in front of the sleeve (28), so that the same sleeve can then be pulled out. (28) by sliding it on the mandrel (27) of the upper tool (18). Conversely, the rotation (R) of the upper arm (39), from bottom to top, makes it possible to position the upper front bearing (26) facing the front spigot of the upper tool (18). Preferably, the unit (14), and thus the cassette (22), may comprise means (46) for moving the upper tool (18) relative to the lower tool (17). The displacement means (46) act on a lever (47). The lever (47) is integral and pivots with the upper pivot (44). The displacement means (46) are for example of pneumatic jack type mechanically connected to the lever (47). The displacement means (46) and the lever (47) are provided on the front face (41) and on the rear face of the cassette (22).

The moving means (46) pulls the lever (47), so as to bring the upper tool (18) towards the lower tool (17). The displacement means (46) serves to lift the upper tool (18) to be able to pull out the sleeve (28, 28a and 28b). These displacement means (46) also serve as a release valve in case of jamming the carton.

Advantageously, the unit (14), and thus the cassette (22), can comprise adjustment means (48), in order to be able to adjust an existing gap between the tool upper (18) and the lower tool (17). The adjusting means (48) act on the lever (47). The adjustment means (48) are for example in the form of a cam forming a stop in contact with the lever (47).

The moving means (46) pushes the lever (47) so as to move the upper tool (18) away from the lower tool (17). The adjustment means (48) serve to adjust the gap between the lower tool (17) and the upper tool (18), for the passage of poses (4). The adjustment means (48) are adjusted so that the strip or strips (20) of the sleeve (28) of the upper tool (18) touch the poses (4) passing between the upper and lower tools (17 and 17). 18). Once the bearings (24 and 26) have been engaged in the respective front trunnions (31), the arms (38 and 39) are locked. The locking of the lower arm (38) is obtained by the support of a second end of the lower arm (38) against a fixed stop (49) of the front face (41) of the cassette (22). The locking of the upper arm (39) is obtained by the support and docking of a second end of the upper arm (39) against a stop (51) on the lever (47).

The present invention is not limited to the embodiments described and illustrated. Many modifications can be made, without departing from the scope defined by the scope of the set of claims.

Claims

1. A waste ejection unit in a packaging production machine (1), positioned downstream of a cutting unit (3) for cutting one or more planar supports (4), comprising a frame ( 16) and two rotary tools (17, 18) cooperating with each other, at least one of the two tools (17, 18) being formed with a mandrel (27) and a removable sleeve (28, 28a, 28b) adapted to inserted (I), locked and rotated by the mandrel (27).

2. Unit according to claim 1, characterized in that the sleeve (28, 28a, 28b) has a wall (33a, 33b) with an outer surface, provided with waste ejection needles (19), engaged in the wall (33a, 33b) and protruding radially outwardly from the outer surface.

3. Unit according to claim 1, characterized in that the sleeve (28) has a wall with an outer surface, provided with at least one strip (20) of a flexible material, projecting radially outwardly from the outer surface.

4. Unit according to any one of the preceding claims, characterized in that the tool (17, 18) comprises a pressurized fluid supply channel (37), putting the wall (33b) of the sleeve (28b) under pressure. , so as to release said sleeve (28b) from the mandrel (27).

5. Unit according to any one of the preceding claims, characterized in that the tool (17, 18) comprises a first removable end piece (34), coaxial, pushing the sleeve (28a) against a second piece d opposite end (36), so as to lock said sleeve (28a) on the mandrel (27).

6. Unit according to any one of the preceding claims, characterized in that it comprises a front bearing (24, 26) for the tool (17, 18), movable between a position for extracting the sleeve (28). and a position allowing hold the sleeve (28) and vice versa.

7. Unit according to any one of the preceding claims, characterized in that it comprises an arm (39), bearing the front bearing (24, 26) at one of its ends, sliding transversely (S), and pivoting (R) between a position locking the rotation shaft (31, 32) of the tool (18) and a position releasing said rotation shaft (31, 32) of said tool (18), and vice versa.

8. Unit according to any one of the preceding claims, characterized in that it comprises adjusting means (48) for adjusting the gap between said lower tool (17) and said upper tool (18).

9. Unit according to any one of the preceding claims, characterized in that it comprises moving means (46) of the upper tool (18) relative to the lower tool (17).

10. Unit according to any one of the preceding claims, characterized in that it comprises a first transport assembly (11) for the plane support (4), placed upstream of the two rotary tools (17, 18), and a second transport assembly (21) for the plane support (4), placed downstream of said two rotary tools

(17, 18), the first and second transport assemblies (11, 21) being mounted in the frame (16).

11. Unit according to any one of the preceding claims, characterized in that it comprises a removable cassette (22), having a frame (23) provided with bearings (24, 26) carrying the two rotary tools (17, 28). and being adapted to be inserted, fixed and extracted from the frame (16).

12. Unit according to claim 11, characterized in that it comprises adjustment means for adjusting a transverse position of the cassette (22).

Packaging production machine, characterized in that it comprises the waste ejection unit (14) according to any one of the claims

RECTIFIED SHEET (RULE 91) ISA / EP previous, positioned downstream of a cutting unit (3).

14. Machine according to claim 13, characterized in that it comprises, in order, from upstream to downstream, a platen cutting press (3), a drive arrangement (6), a transfer device (9), a first vacuum transport (11), the unit (14), and a second vacuum transport (21).

15. Sleeve for a waste ejection unit, positioned downstream of a cutting unit (3) for cutting one or more planar supports (4) in a packaging production machine (1), suitable to be locked and to be rotated by a mandrel (27), so as to form a rotary tool (17), having a wall (33a, 33b) with an outer surface, provided with waste ejection needles ( 19), engaged in the wall (33a, 33b) and protruding radially outwardly from the outer surface, and adapted to cooperate with a rotary tool (18) provided with at least one strip (20) in one flexible material.

16. Sleeve for a waste ejection unit, positioned downstream of a cutting unit (3) for cutting one or more flat supports (4) in a packaging production machine (1), suitable to be locked and to be rotated by a mandrel (27), so as to form a rotary tool (18), having a wall with an outer surface, provided with at least one strip (20) of a flexible material, protruding radially outwardly from the outer surface, and adapted to cooperate with a rotary tool (17) provided with waste ejection needles (19).

17. Waste ejection cassette for a waste ejection unit (14) positioned downstream of a cutting unit (3) for cutting one or more planar supports (4) in a production machine package (1), comprising a frame (23) provided with bearings (24, 26), carrying two rotary tools (17, 18) cooperating with one another, one of the tools (17) being provided with ejecting the waste (19) protruding radially outwardly, the other of the tools (18) being provided with at least one strip (20) of a flexible material projecting radially outwards, at least one one of the two tools (17, 18) being formed with a mandrel (27) and a removable sleeve (28), able to be inserted, locked and rotated by the mandrel (27).