Packaging machine

Abstract

The invention relates to a packaging machine. The packaging machine (1000) is provided with a sealing and cutting assembly (100). The sealing and cutting assembly comprises a first rotating assembly having a first axis of rotation (1.0) and a first actuating tool (1.1) rotating relative to the first axis of rotation (1.0), a second rotating assembly having a second axis of rotation (2.0) and a second actuating tool (2.1) rotating relative to the second axis of rotation (2.0), and two gears (4.21, 4.22) associated with the second actuating tool (2.1) and a transmission system (4), one of the gears (4.21, 4.22) being associated with a rotational degree of freedom. The sealing and cutting assembly (100) comprises an adjustment actuator (5) for causing relative rotation between the gears (4.21, 4.22).

Description

Technical Field

[0001] This invention relates to packaging machines. Background Technology

[0002] Different types of packaging machines are known for packaging products. One type of packaging machine packages a product in a continuous film, producing, for example, a pillowcase. For this purpose, the longitudinal edges of the film are sealed by a longitudinal sealing assembly, creating a film tube. Together with the product inside the film tube, the film tube is subjected to a sealing and cutting assembly that transversely cuts the film tube, dividing it into two parts, and transversely seals each side of the cut. A transverse seal on one side of the cut closes one end of the film tube, and another seal closes the second end of the package, which is then physically separated from the film tube by the transverse cut. The first end of the package has already been closed in the previous operation of the sealing and cutting assembly and corresponds to the end of the film tube that was already sealed in that previous operation.

[0003] In some cases, the sealing and cutting assembly comprises two rotating components, with the membrane tube moving between them. Each rotating component includes a rotation axis and an actuating tool that rotates relative to the corresponding rotation axis. The actuating tools are configured such that, in the rotated position, they cooperate with each other to perform the previously described sealing and cutting operations on the membrane tube, and for this purpose, the rotation axes are parallel to each other and spaced apart by a defined vertical distance, which depends on the properties of the membrane that must be acted upon when the rotating components cooperate with each other.

[0004] Therefore, it is usually necessary to adjust the position of at least one of the two rotating components, in particular, to adjust the position of its axis of rotation relative to the axis of rotation of the other rotating component, so that the two axes of rotation are parallel to each other and at a corresponding fixed distance from each other.

[0005] This packaging machine includes an actuator for rotating a first rotating assembly and a transmission system for transmitting that rotation to a second rotating assembly. The transmission system typically includes a gear that rotates together with the first rotating assembly relative to a corresponding axis of rotation, and a second gear that rotates together with the second rotating assembly relative to a corresponding axis of rotation. The second gear meshes with the first gear, causing the second gear to rotate together with the first gear, thereby transmitting the rotation of the first rotating assembly to the second rotating assembly.

[0006] US3641857A discloses a packaging machine having such a sealing and cutting assembly, including a first rotating assembly having a first axis of rotation and a first actuating tool, a second rotating assembly having a second axis of rotation and a second actuating tool, an actuator for rotating the first rotating assembly about its axis of rotation, and a transmission system for transmitting such rotation to the second rotating assembly.

[0007] CN104443561A discloses a sealing and cutting assembly. Summary of the Invention

[0008] The purpose of this invention is to provide a packaging machine.

[0009] The packaging machine includes a sealing and cutting assembly, which includes a first rotating assembly having a first axis of rotation and a first actuating tool, a second rotating assembly having a second axis of rotation and a second actuating tool, an actuator associated with the first rotating assembly and configured to rotate the first actuating tool relative to the first axis of rotation, and a transmission system for transmitting the rotation to the second actuating tool and thereby rotating the second actuating tool relative to the second axis of rotation.

[0010] The transmission system includes a first transmission assembly and a second transmission assembly, the first transmission assembly having a drive gear attached to a first rotating assembly, and the second transmission assembly being associated with the second rotating assembly and configured to cooperate with the drive gear.

[0011] The second transmission assembly includes a first gear and a second gear adjacent to the first gear. The first gear rotates relative to a second axis of rotation and is attached to the second rotating assembly, causing the second actuating tool to rotate together with the first gear. Both gears of the second transmission assembly are concentric and mesh with a drive gear, and the relative angular position between the gears of the second transmission assembly is adjustable. Preferably, the gears of the transmission system have equal tooth pitch, such that the gears of the two transmission assemblies are complementary.

[0012] In practice, it is usually necessary to adjust the position between the first and second rotation axes, at least, according to the characteristics of the membrane (thickness, material, etc.), and this may require shifting at least one rotation axis relative to the other by decreasing or increasing the distance between these rotation axes. Changing the distance between these rotation axes also changes the lateral clearance between the teeth of the drive gear of the first transmission component and the teeth of the gear of the second transmission component, because the teeth of the gear of the second transmission component change the degree of meshing between two adjacent teeth of the drive gear. This lateral clearance affects the accuracy of the actuation tool during sealing and cutting the membrane (the greater the lateral clearance, the lower the accuracy), because the pressure generated between the actuation tools used to seal the membrane may cause free or uncontrolled movement between the teeth of the cooperating gears, resulting in damage to the actuation tool and / or incorrect sealing.

[0013] Until now, to at least partially avoid this problem, once the position of one actuating tool relative to the other has been adjusted (and thus the position of one axis of rotation relative to the other), the gear is manually pressed so that its teeth engage the teeth of the other gear, and the relative position between the two gears is blocked by fixing the gear associated with the actuating tool whose position has been adjusted (with the possibility of rotation but not displacement). This prevents subsequent simple and quick modifications to the sealing and cutting assembly construction to work with different blades.

[0014] Because the second transmission assembly has two gears instead of a single gear, and because of the possibility of adjusting the relative angular position between the two gears, the sealing and cutting assembly of the proposed packaging machine facilitates the task, allowing positional changes between the two rotating axes to be performed in a simple and labor-saving manner. It also allows the sealing and cutting assembly to be readjusted as needed multiple times to use different films of different materials, thicknesses, etc., without any possible lateral clearance adversely affecting the aforementioned accuracy.

[0015] The sealing and cutting assembly includes at least one actuator configured to act on at least one gear in a second transmission assembly, and to cause relative rotation between the gears relative to a second axis of rotation upon actuation, thereby adjusting the angular position between the two gears.

[0016] By inducing relative rotation, a tooth of one gear in the second transmission assembly, engaged between two teeth of the drive gear of the first transmission assembly, contacts one of the teeth of the drive gear of the first transmission assembly, and also a tooth of another gear in the second transmission assembly, engaged between the two teeth of the drive gear of the first transmission assembly, contacts the other tooth of the drive gear, thereby preventing free movement between the drive gear and the gear of the second transmission assembly (one gear prevents free movement in one direction, and the other gear prevents free movement in the other direction). By holding the gear of the second transmission assembly in this position, the rotation of the first rotating assembly is perfectly transmitted to the second rotating assembly, and the aforementioned problems are avoided.

[0017] If it is necessary to readjust the position of the second transmission assembly, it is sufficient to first release the adjustment of the angular position between the gears of the second transmission assembly. This can be done, for example, by stopping the actuator and then adjusting the position as needed to make the actuator actuate again so that the two gears of the second transmission assembly engage with the teeth of the drive gear of the first transmission assembly, as described above.

[0018] The actuator simply needs to be actuated to lock or release the angular position adjustment between the gears of the second transmission assembly, and this can be done simply, quickly and safely.

[0019] These and other advantages and features of the invention will become apparent from the accompanying drawings and the detailed description of the invention. Attached Figure Description

[0020] Figure 1 An embodiment of the packaging machine according to the present invention is shown.

[0021] Figure 2 yes Figure 1 A perspective view of the sealing and cutting components of a packaging machine.

[0022] Figure 3 It shows three different locations. Figure 2 The relationship between the actuation tools of the two rotating components of the sealing and cutting assembly.

[0023] Figure 4 yes Figure 2 A perspective view of the transmission system of the sealing and cutting components.

[0024] Figure 5 yes Figure 4 The front view of the transmission system shown.

[0025] Figure 6 It shows Figure 4 The details of the gear meshing in the transmission system.

[0026] Figure 7 It is based on Figure 5 A view of section BB.

[0027] Figure 8 It is based on Figure 5 A view of section AA.

[0028] Figure 9 It shows Figure 1 The actuation drive of the packaging machine. Detailed Implementation

[0029] As an example, such as Figure 1 The proposed packaging machine 1000 shown includes a sealing and cutting assembly 100. (See reference...) Figure 2The sealing and cutting assembly 100 includes a first rotating assembly 1 having a first rotation axis 1.0 and at least a first actuating tool 1.1, a second rotating assembly 2 having a second rotation axis 2.0 and at least a second actuating tool 2.1, an actuator 3 associated with the first rotating assembly 1 to rotate the first rotating assembly 1 relative to the rotation axis 1.0, and a transmission system 4 for transmitting the rotation to the second rotating assembly 2 and for rotating the second actuating tool 2.1 relative to the second rotation axis 2.0. Thus, the two rotating assemblies 1 and 2 rotate simultaneously. The rotation axes 1.0 and 2.0 are preferably spaced apart in the vertical direction.

[0030] Actuating tools 1.1 and 2.1 are configured to rotate assemblies 1 and 2 as follows: Figure 3 The actuators cooperate during rotation at the given position (or within the angular range β of the position). Each actuating tool 1.1 and 2.1 protrudes from rotation axes 1.0 and 2.0, which correspond radially to the rotation axes 1.0 and 2.0, and the rotating assemblies 1 and 2 are configured such that the two actuating tools 1.1 and 2.1 cooperate with each other when they are aligned and opposite in their radial directions. Preferably, the cooperation occurs within the given angular range β, where the center is located at the radially aligned and opposite positions, such as... Figure 3 As shown.

[0031] In the packaging machine 1000 having two rotating components 1 and 2 as described above, a film tube 300 containing a product to be packaged passes between the two rotating components 1 and 2 (the product is not shown in the figure), and when the actuating tools 1.1 and 2.1 of the rotating components 1 and 2 cooperate with each other, they transversely cut the film tube 300 and transversely seal the film tube 300 on both sides of the transverse cut. This results in a separate closed container downstream of the transverse cut and a film tube 300 closed at one end upstream of the cross-section.

[0032] like Figure 4 and Figure 5 As shown, the transmission system 4 includes a first transmission component 4.1 and a second transmission component 4.2. The first transmission component 4.1 has a drive gear 4.11 attached to the first rotating component 1, and the second transmission component 4.2 is associated with the second rotating component 2 and configured to cooperate with the drive gear 4.11.

[0033] The second transmission assembly 4.2 includes a first gear 4.21 and a second gear 4.22. The first gear 4.21 is attached to the second rotating assembly 2 such that the second actuating tool 2.1 and the first gear 4.21 rotate together relative to the second rotation axis 2.0. The second gear 4.22 is adjacent to and concentric with the first gear 4.21. Both gears 4.21 and 4.22 mesh with the drive gear 4.11, and the relative angular position between gears 4.21 and 4.22 is adjustable. The fact that one gear meshes with another means that the teeth of one gear insert into the pitch between the teeth of the other gear; therefore, due to this cooperation between the teeth of the two gears, the rotation of one gear causes the other gear to rotate.

[0034] The sealing and cutting assembly 100 includes at least one adjusting actuator 5 configured to act on at least one of two gears 4.21 and 4.22 of the second transmission assembly 4.2, and to cause relative rotation between the two gears 4.21 and 4.22 relative to the second rotation axis 2.0 by said actuation, thereby adjusting the angular position between the two gears 4.21 and 4.22. In other embodiments, the adjusting actuator 5 may cause the two gears 4.21 and 4.22 to rotate relative to the second rotation axis 2.0 but in opposite directions.

[0035] Therefore, when the teeth of each gear 4.21 and 4.22 of the second transmission assembly 4.2 mesh between two teeth of the first drive gear 4.11 (in the pitch of the first drive gear 4.11), the teeth of gears 4.21 and 4.22 are forced to contact the corresponding teeth of the first drive gear 4.11 by adjusting the actuation of the actuator 5 (see...). Figure 6 Therefore, when the teeth of the first gear 4.21 contact the teeth of the drive gear 4.11, the first gear 4.21 prevents free movement between the two transmission components 4.1 and 4.2 in one direction, and when the teeth of the second gear 4.22 contact the other tooth of the drive gear 4.11, the second gear 4.22 prevents free movement between the two transmission components 4.1 and 4.2 in opposite directions. When the actuator 5 is in operation, it holds gears 4.21 and 4.22 in this position relative to the drive gear 4.11, and if the adjusting actuator 5 is deactivated, gears 4.21 and 4.22 are released, allowing their relative angular position to be adjusted and easily recalibrated.

[0036] The regulating actuator 5 preferably includes a cylinder having a housing 5.0 attached to one of the gears 4.21 and 4.22 of the second transmission assembly 4.2 (preferably attached to the first gear 4.21), and a piston rod 5.1 displaceable relative to the housing 5.0 and attached to the other gear 4.21 or 4.22 of the second transmission assembly 4.2 (see...). Figure 7For this purpose, preferably, at least one of gears 4.21 or 4.22 includes a through-hole through which the adjusting actuator 5 engages with gear 4.21 or 4.22. When the adjusting actuator 5 is actuated, the piston rod 5.1 extends relative to the housing 5.0, and when it is no longer actuated, the piston rod 5.1 retracts or can be easily retracted because it is not forced into the extended position. Therefore, when the adjusting actuator 5 is actuated, the size of the through-hole allows relative movement between gears 4.21 and 4.22. Preferably, the adjusting actuator 5 is actuated by a fluid such as pressurized air, in this case a pneumatic actuator (pneumatic cylinder).

[0037] Preferably, the sealing and cutting assembly 100 includes a plurality of regulating actuators 5 (see Appendix). Figure 4 and Figure 5 This arrangement distributes the force required for the teeth of gears 4.21 and 4.22 of the second transmission assembly 4.2 to press against the teeth of the drive gear 4.11 of the first transmission assembly 4.1 between the regulating actuators 5, thereby allowing the use of regulating actuators 5 with less force, resulting in a more compact design. Preferably, in these embodiments, all regulating actuators 5 are connected to the same fluid source.

[0038] The packaging machine 1000 includes a control unit 6 configured to control the supply of fluid to the regulating actuator 5. In this way, the control unit 6 can deliver fluid to the regulating actuator 5 when needed (e.g., when the packaging machine 1000 has been regulated and is about to be put into operation), thereby causing the regulating actuator 5 to be actuated, or can stop the fluid reaching the regulating actuator 5 to stop the actuation of the regulating actuator 5, for example, when it is necessary to readjust the sealing and cutting assembly 100 to change the packaging film to another material, thickness, etc.

[0039] The sealing and cutting assembly 100 preferably includes a controllable electronic valve (not shown) between the fluid source and the regulating actuator 5 of the sealing and cutting assembly 100. A control unit 6 is communicated with the electronic valve and configured to control the closing and opening of the electronic valve, thereby causing simultaneous actuation of all regulating actuators 5. Optionally, the sealing and cutting assembly 100 may include a controllable electronic valve (not shown) between the fluid source and each regulating actuator 5 of the sealing and cutting assembly 100. A control unit 6 is communicated with the electronic valve and configured to control the closing and opening of the electronic valve. Preferably, the control unit 6 is configured to cause simultaneous actuation of the regulating actuators 5.

[0040] The control unit 6 may include, for example, a microprocessor, a controller, an FPGA, or any other device capable of computation.

[0041] like Figure 8As shown, the second actuating tool 2.1 of the second rotating assembly 2 includes a longitudinal bore 2.17 and at least one radial bore 2.18. The longitudinal bore 2.17 communicates with a fluid source and extends along the second rotation axis 2.0 from the side of the second actuating tool 2.1 closest to the first gear 4.21 and the second gear 4.22 of the second transmission assembly 4.2. The radial bore 2.18 communicates with the longitudinal bore 2.17 and a corresponding adjusting actuator 5. The longitudinal bore 2.17 is rotatably connected to a conduit supplying fluid from the fluid source, such that during operation of the sealing and cutting assembly, fluid from a stationary fluid source can be easily redirected to the corresponding adjusting actuator 5, which rotates with the first gear 4.21, and then redirected to the second gear 4.22. Despite the inclusion of the adjusting actuator 5, this results in a compact sealing and cutting assembly 100.

[0042] The second actuating tool 2.1 may include: a sealing tool 2.11 having two sealing surfaces 2.111 and 2.112; and a cutting tool 2.12, such as a blade, disposed between the sealing surfaces 2.111 and 2.112 and configured to move relative to the sealing tool 2.11 between a working position and a non-working position, in the working position protruding from the sealing surfaces 2.111 and 2.112 of the sealing tool 2.11, and in the non-working position retracting relative to the sealing surfaces 2.111 and 2.112 (see [link to documentation]). Figure 3 ); and the actuator 2.13, which in Figure 9 As described, the cutting tool 2.12 is configured to move by means of a fluid and, with its actuation, move at least from a non-working position to a working position. In this way, the actuation of the cutting tool 2.12 can be controlled by controlling the actuation of the actuation driver 2.13, which means more efficient use of the cutting tool 2.12 and less wear on the cutting tool 2.12.

[0043] Preferably, the actuator 5 and the actuator driver 2.13 of the second actuation tool 2.1 are connected to the same fluid source, and the sealing and cutting assembly 100 is simplified.

[0044] Preferably, the second actuating tool 2.1 includes at least two actuation drivers 2.13, one on each side of the cutting tool 2.12 relative to the rotation axis 2.0, with both actuation drivers 2.13 acting simultaneously. In this way, compared to using a single actuation driver 2.13, the size of the actuation driver 2.13 can be reduced by dividing the required force, and correct actuation of the cutting tool 2.12 is ensured by actuating from both sides simultaneously.

[0045] like Figure 9As shown, the second actuating tool 2.1 of the second rotating assembly 2 includes a longitudinal bore 2.19 extending along the second rotation axis 2.0 from the side of the second actuating tool 2.1 furthest from the first gear 4.21 and the second gear 4.22, and communicating with a fluid source and an actuation driver 2.13. The longitudinal bore 2.19 can be rotatably connected to a conduit supplying fluid from the fluid source and to a second conduit disposed above the second actuating tool 2.1, which guides the fluid to the corresponding actuating tool 2.13. The longitudinal bore 2.19 can be connected to a slip ring through which current is supplied to the second actuating tool 2.1 to heat it, and the fluid source can be connected to the slip ring. In this way, fluid can be redirected from a stationary fluid source to the corresponding rotary actuator 2.13.

[0046] Preferably, the packaging machine 100 includes a control unit 6 configured to actuate the actuator 2.13 when the second actuating tool 2.1 is in an angular position where it engages with the first actuating tool 1.1 to seal and cut the film disposed between the two actuating tools 1.1 and 2.1. The control unit is preferably in communication with an electronic valve (not shown) disposed in the fluid path between the fluid source and the actuator 2.13, and is configured to control the opening and closing of the electronic valve to open or close the fluid passage therethrough.

[0047] The packaging machine 100 may also include pressure actuators 11 on each side of the actuation tool 2.1 of the second rotating assembly 2 relative to the second axis of rotation 2.0, such as... Figure 9 As shown in the example, pressure actuator 11 is configured to press the second rotating assembly 2 in a downward direction, such that the second rotating assembly 2 applies the required pressure to the first rotating assembly 1 when mating for sealing. Pressure actuators 11 are fluid-driven and preferably connected to the same fluid source so that they can be actuated simultaneously. Preferably, they are connected to the same fluid source to which regulating actuator 5 is connected.

[0048] The control unit 6 can be additionally configured to simultaneously control the fluid supply of the pressure actuator 11, and the fluid supply of actuators 5 and 11 is actuated, and actuators 5 and 11 are deactivated when a configuration change of the sealing and cutting assembly 100 is to be performed.

[0049] The packaging machine 100 may also include a controllable electronic valve located between the fluid source and the pressure actuator 11, which controls the flow of fluid to the pressure actuator 11 by controlling the opening and closing of the electronic valve.

Claims

1. A packaging machine comprising a sealing and cutting assembly (100), the sealing and cutting assembly (100) comprising a first rotating assembly (1) having a first rotation axis (1.0) and at least a first actuating tool (1.1), a second rotating assembly (2) having a second rotation axis (2.0) and at least a second actuating tool (2.1), an actuator (3) associated with the first rotating assembly (1) for rotating the first actuating tool (1.1) relative to the rotation axis (1.0), and a transmission system (4) for transmitting the rotation to the second actuating tool (2.1) and for rotating the second actuating tool (2.1) relative to the second rotation axis (2.0), the transmission system (4) comprising having an attachment to The first rotating assembly (1) comprises a first transmission assembly (4.1) of a drive gear (4.11) and a second transmission assembly (4.2) associated with and configured to engage with the drive gear (4.11). The second transmission assembly (4.2) includes a first gear (4.21) rotatable relative to the second rotation axis (2.0) and connected to the second rotating assembly (2), and a second gear (4.22) adjacent to the first gear (4.21) of the second transmission assembly (4.2). The two gears (4.21, 4.22) of the second transmission assembly (4.2) are concentric and the gears (4.21, 4.22) mesh with the drive gear (4.11). The second transmission assembly is characterized by... The relative angular position between the gears (4.21, 4.22) is adjustable, and the sealing and cutting assembly (100) includes at least one adjusting actuator (5) configured to act on at least one of the gears (4.21, 4.22) of the second transmission assembly (4.2) and cause relative rotation between the gears (4.21, 4.22) relative to the second rotation axis (2.0) by such actuation.

2. The packaging machine according to claim 1, wherein, The regulating actuator (5) of the sealing and cutting assembly (100) includes a cylinder having a housing (5.0) of one of the gears (4.21, 4.22) of the second transmission assembly (4.2) and a piston rod (5.1) of the other gear (4.21, 4.22) of the second transmission assembly (4.2), the housing (5.0) and the piston rod (5.1) being movable relative to each other.

3. The packaging machine according to claim 2, wherein, The sealing and cutting assembly (100) includes a plurality of adjusting actuators (5) configured to act on at least one of the gears (4.21, 4.22) of the second transmission assembly (4.2), and by such actuation causing relative rotation between the gears (4.21, 4.22) relative to the second rotation axis (2.0).

4. The packaging machine according to claim 2 or 3, wherein, The regulating actuator (5) is connected to a fluid source and is configured to be actuated by fluid, preferably by pressurized air.

5. The packaging machine according to claim 3, wherein, All of the aforementioned regulating actuators (5) are connected to the same fluid source, and the regulating actuators (5) are configured to be actuated by fluid, preferably by pressurized air.

6. The packaging machine according to claim 4 or 5, the packaging machine comprising a control unit (6) configured to control the supply of fluid driving the regulating actuator (5).

7. The packaging machine according to any one of claims 4 to 6, wherein, The second actuating tool (2.1) includes a longitudinal hole (2.17) and a radial hole (2.18). The longitudinal hole extends from the side of the second actuating tool (2.1) closest to the first gear (4.21) and the second gear (4.22) of the second transmission assembly (4.2). The radial hole communicates with the longitudinal hole (2.17) and the corresponding adjusting actuator (5). The longitudinal hole (2.17) communicates with the fluid source.

8. The packaging machine according to any one of claims 4 to 7, wherein, The second actuating tool (2.1) includes: a sealing tool (2.11) having two sealing surfaces (2.111, 2.112); a cutting tool (2.12) disposed between the two sealing surfaces (2.111, 2.112) and configured to move relative to the sealing tool (2.11) between a working position and a non-working position, wherein in the working position the cutting tool (2.12) protrudes from the sealing surfaces (2.111, 2.112) of the sealing tool (2.11), and in the non-working position the cutting tool (2.12) retracts relative to the sealing surfaces (2.111, 2.112); and at least one actuation actuator (2.13) configured to be actuated by the action of a fluid, and to move the cutting tool (2.12) from at least the non-working position to the working position by actuation of the at least one actuation actuator.

9. The packaging machine according to claim 8, wherein, The regulating actuator (5) and the actuator driver (2.13) of the second actuation tool (2.1) are connected to the same fluid source.

10. The packaging machine according to claim 9, wherein, The second actuating tool (2.1) includes an actuation driver (2.13) located on each side of the cutting tool (2.12) relative to the rotation axis (2.0).

11. The packaging machine according to claim 10, wherein, The second actuating tool (2.1) includes a longitudinal hole (2.19) extending along the second rotation axis (2.0) from the side of the second actuating tool (2.1) furthest from the first gear (4.21) and the second gear (4.22), the longitudinal hole (2.19) communicating with the fluid source and the corresponding actuating driver (2.13) of the cutting tool (2.12).

12. The packaging machine according to claim 10 or 11, the packaging machine comprising a control unit configured to, when the second actuating tool (2.1) is in an angular position cooperating with the first actuating tool (1.1), cause a supply of fluid to seal and cut a film disposed between the two actuating tools (1.1, 2.1), the fluid actuating the actuation driver (2.13) of the second actuating tool (2.1).

13. The packaging machine according to any one of claims 4 to 6, the packaging machine comprising a pressure actuator (11) located on each side of the actuation tool (2.1) of the second rotating assembly (2), the pressure actuator being configured to press the second rotating assembly (2) in a downward direction, the pressure actuator (11) being fluid-driven.

14. The packaging machine according to claim 13, wherein, The pressure actuator (11) and the regulating actuator (5) are connected to the same fluid source.

15. The packaging machine according to claim 13 or 14, the packaging machine comprising a control unit configured to simultaneously control the supply of fluid driving the pressure actuator (11) and the regulating actuator (5).

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