• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    REWIND MACHINE AND METHOD TO PRODUCE WEB MATERIAL RECORDS. The present invention relates to the machine comprising a first rewinding bearing (3) and a concave plate (17) extending around the first rewinding bearing (3). The first rewind bearing and the concave plate define a feed channel (19) for the web material (N). Upstream of the concave plate (17) a moving element (21) is arranged comprising a mechanical clamping surface (23B) cooperating with the first rewinding bearing (3) to clamp the web material (N) against the first bearing rewind (3) and decelerate the web material between the movement element (21) and the surface of the first rewind bearing (3), causing a leading edge (LT) to rotate around itself to form a winding core of a log (L; L1).
    公开号:BR112013025922B1
    申请号:R112013025922-1
    申请日:2012-04-04
    公开日:2020-11-17
    发明作者:Graziano Mazzaccherini；Romano Maddaleni；Franco Montagnani
    申请人:Fab Io Perini S.P.A.；
    IPC主号:
    专利说明:

    DESCRIPTION Technical Field
    [0001] The present invention relates to paper converting machines and in particular, machines for producing rolls of crepe paper or tissue paper. State of the art
    [0002] Paper is normally produced by continuous machines that, by distributing a stock of cellulose fibers and water distributed from the inbox, generates a sheet of cellulose material in a forming material fabric, the sheet of which is dried and wound in large diameter coils. These coils are subsequently unwound and rewound and form smaller diameter registers. The records are subsequently divided into rolls of dimensions equal to those of the final product. With this technique, rolls of bathroom paper, kitchen towels or other tissue papers are usually manufactured.
    [0003] The winding of registers usually takes place using colors of winding cartons, which are inserted in the rewinding machine and around which the register is formed. The cardboard core inside each record is cut along with the rolled material from the web. Examples of such rewinding machines are described in US-A-5,979,818 and US-A-4,487,377.
    [0004] In other prior art rewinding machines, winding takes place around mandrels that can be extracted or recyclable. An example of a rewinding machine for forming registers around tubular winding colors is described in US-B-6,752,345. US-B-6,565,033 describes a rewinding machine for winding web material registers around winding mandrels divided into two portions, which are removed from the register after winding is complete.
    [0005] Machines have also been manufactured, which perform winding of a log (log) without the use of winding colors or mandrels. Examples of such machines are described in US-A-5,538,199; US-A-5,839,680; US-A-5,505,402; US-A-5,402,960; US-A- 6,752,344 and EP 0611723.
    [0006] In particular, US-A-5,839,680 and other patents of the same family describe a machine in which a record of web material is rolled up to form a central core that begins to wind around it even after the web material is separate upon completion of a record winding. The web material is for this purpose clamped between the moving plate and a coil bearing around which the web material is guided. The moving plate is pressed against the cylindrical surface of the winding bearing in such a way as to cause substantial deceleration of the web material and disruption of the web downstream of the clamping point. The moving plate has a convex portion, in which the web material is pressed by the plate against the outer surface of the winding bearing, and a concave portion. The relative movement between the cylindrical surface of the winding bearing and the surface of the plate causes the beginning of winding of a central core of the subsequent register together with the concave portion of the surface of the moving plate. The initial registration winding core is formed between the moving plate and the winding bearing surface and advances along the moving plate, increasing in diameter, winding, until reaching a defined winding frame between a plurality of winding bearings .
    [0007] This prior art machine has notable advantages, including that of forming the web material records without a central winding core and without a central hole, consequently allowing a large amount of web material to be wound in a small space.
    [0008] Despite the advantages mentioned above, these machines have some problems, including being difficult to be in perfect tune, due to the critical nature of the initial step of separating material from the web and starting winding the central core around itself. This difficulty is compounded by the fact that the web material can vary in its characteristics, for example, thickening, weight (density of the paper) and tensile strength, parameters that influence the initial step of separating the web material and winding the edge generated by rupture around itself.
    [0009] US-A-5,603,467 describes a rewinding machine configured with two winding systems that enable the alternative production of registers with a central winding core and registers without a central winding core. This machine is particularly versatile, although switching from one of the two possible operating modes to one another is complex and requires substantial operations to adapt it. Summary of the Invention
    [00010] The object of the invention is a rewinding machine capable of winding registers without a winding core and without a winding mandrel, which allows the drawbacks of prior art machines to be at least partially overcome.
    [00011] The object of the invention also relates to a new method of winding registers without a winding core and without a winding mandrel, which makes it possible to supply a higher quality product with respect to the product that can be obtained with machines conventional.
    [00012] In substance, according to a first aspect, the invention provides a rewinding machine to produce web material records, comprising a first winding bearing and a concave plate extending around the first winding bearing, with a concave surface facing the winding bearing. The first winding bearing and the concave plate define a feed channel for the web material. It is also provided a feed path for the web material extending along said channel and upstream of the concave plate. Furthermore, a moving element is provided which comprises a clamping surface cooperating with the first winding bearing to press the web material against a side surface of the first winding bearing. The moving element is arranged and controlled to press the web material against the surface of the first winding roller and to slow the web material between the moving element and the surface of the first winding roller, causing a leading edge to curl around itself to form a winding core of the second register. Once the step to form the initial core of the new register between the moving element and the winding bearing has begun, the core is transferred to the channel, in order to continue to wind up to advance along the channel, in contact with the surface concave of the concave plate arranged around the winding bearing.
    [00013] In this way, a machine is obtained in which the initial step to start winding the initial edge of each register around itself takes place by means of a moving element, different from the substantially stationary element (the concave plate) which then transfers the initial winding core for the winding frame, for example, formed by a cluster of winding bearings. The moving element is controlled so as to transfer the initial winding core from the clamping area between the moving element and the bearing to the channel defined between the bearing and the concave surface, facing the winding bearing, of the concave plate.
    [00014] Preferably, the height of the channel defined by the first winding bearing and the concave plate gradually increases from the entrance to the exit, for example, providing a radius of curvature gradually increasing from the concave surface.
    [00015] The web material is advantageously fed at a substantially constant speed. Substantially constant is understood as a speed that can vary due to requirements related to the transitory steps, such as changing the original coil of the web material, but that does not need to be modified during the various stages of the same winding cycle, that is, forming of a web material record.
    [00016] However, the speed of the web material can be modified locally. A local variation in the speed of the web material is a variation that involves a portion of the web material, for example, in the section where the separation should take place, without changing the total speed of the winding.
    [00017] Preferably, the moving element is arranged and controlled also to cause separation of the material from the web, before the leading edge curls around itself after separating. The separation can advantageously take place as a result of the tension produced in the web material due to the local difference in speed produced by the separation through the moving element.
    [00018] It would also be possible to use alternative or auxiliary means to cause or facilitate the separation of the web material, such as a variation in the peripheral speed of the winding bearings, an air jet system acting on the web material between the point of tighten by the moving element and the complete register, or similar. In less advantageous ways the web material can be separated upstream of the clamping point, using the moving element only as a means to start winding the new register, and retaining the web material adhering to the first bearing through a suction system or other appropriate restraint systems.
    [00019] In several advantageous modalities the machine comprises a peripheral winding frame, in which the register is transferred, after leaving the channel formed between the concave plate and the lateral surface of the first winding bearing. The winding frame generally comprises a series of moving elements that, remaining in contact with the surface of the log, turning it to wind the web material. The moving elements can comprise the first winding bearing mentioned above. In advantageous embodiments, the winding frame is formed by a series or cluster of winding bearings, for example, three winding bearings.
    [00020] Preferably, the machine comprises a second winding bearing disposed substantially parallel to the first winding bearing in order to define a tightness between the first winding bearing and the second winding bearing, said concave plate extending upstream of said clamping and said web material feed path extending through said clamping.
    [00021] Downstream of the tightening between the first and the second winding bearings, a winding frame formed by the first winding bearing, the second winding bearing and a third winding bearing, preferably with a movement axis, can be advantageously provided. .
    [00022] In advantageous embodiments, the moving element is controlled in such a way that the clamping surface has a speed that is less than the peripheral speed of the first winding bearing when said clamping surface is pressed against the first winding bearing. . The lower speed can also be understood as a speed oriented in the opposite direction with respect to that of the winding bearing (at least for a period of time).
    [00023] Advantageously, in some embodiments, the concave plate defines an entrance edge cooperating with the moving element to form a transfer surface for rolling the initial winding core of the recording of the moving element to said concave plate. For example, a comb-shaped edge can be provided on the concave plate and a clamping surface between the moving element and the winding bearing can be formed with a series of projections that enter between the teeth of the comb-shaped edge .
    [00024] To facilitate the initial rolling step of the central core of each new register, in some particularly advantageous embodiments of the invention the first winding bearing comprises a lateral surface defining a longitudinal projection, extending in parallel to the axis of said first bearing of winding and projecting radially in relation to the cylindrical surface of the first winding bearing. The presence of a projection allows for improved control of the separation of material from the web and the beginning of rewinding a new record and thus allows some important advantages to be obtained in terms of product quality and production speed. However, in simpler embodiments, the projection can be omitted and the first winding bearing can have a substantially cylindrical side surface with a constant radius.
    [00025] In some embodiments, adjacent to the longitudinal projection and behind it with respect to the direction of rotation, the first winding bearing has a first portion of the lateral surface with a diameter gradually decreasing from said projection and ending tangentially to a cylindrical surface defining a second portion of the side surface of the first winding bearing, said cylindrical surface defining said second portion of the side surface of the winding bearing having a substantially constant radius.
    [00026] According to some modalities, the first winding bearing has a lateral surface formed by a first circular cylindrical portion with constant radius and a second cylindrical portion with variable radius, extending parallel to the axis of the first winding bearing, projecting with respect to said first cylindrical portion with constant radius. Advantageously, along the longitudinal projection at least one suction opening can be provided, preferably having the form of a slot extending parallel to the axis of the first winding bearing and for said projection. The use of a suction system improves the control of the web material by separating step and starting winding from a new record. However, in simpler modes, suction can be omitted.
    [00027] To obtain a flexible machine, which is capable of producing not only registers without a core and central hole, but also conventional registers with a winding core or central hole formed by extracting a winding core that can be removed, or winding mandrel, advantageously the concave plate can be movable between an operational position, in which it defines said web material feed channel, and an inactive position, in which it is placed at a distance from the first winding bearing. . In combination with the concave plate, a concave frame positioned advantageously around the first winding bearing can be provided, integrated with the same machine, alternatively to the concave plate, said concave frame having a radius of curvature greater than the radius of curvature of said concave plate. The radius of curvature can be constant, or variable.
    [00028] When the radius of curvature is variable, a larger radius is understood as a radius of curvature that is always greater than the radius of the concave plate.
    [00029] When required, the concave frame can be mounted movable to alternatively take an operational position, in which it is arranged around the first winding bearing to define a feed channel for the web material, and an inactive position. The movement can be a translation movement, a rotation movement or a combined movement.
    [00030] According to a different aspect, the invention relates to a method for winding web material records without a winding core, comprising the steps of: feeding a web material around a first winding bearing; winding a first record; - upon completion of the winding of said first record, separate the material from the web forming a free trailing edge of the first record and a free cutting edge edge of a second record; winding around itself an initial portion of said web material, adjacent to said free leading edge, between the surface of the first winding roller and a moving element, forming an initial core of said second register; transferring said initial core from the second register of the moving element to a channel defined between the first winding bearing and a concave plate extending around said first winding bearing; feeding said initial core of the second stream by winding it along said channel in contact with said concave plate and said first winding bearing, continuing to wind the web material around it.
    [00031] According to advantageous modalities, the initial core of the second register is then fed from the to a defined contraction between the first winding bearing and a second winding bearing. From the contraction the register being formed passes to a winding frame, formed by the elements moving on the surface in contact with the register, such as a cluster of winding bearings comprising the first and the second winding bearing and a third winding bearing .
    [00032] Preferably, the web material is separated by means of the same moving element, which starts forming the central core of each new record.
    [00033] In advantageous embodiments of the method according to the present invention, the web material is separated by the moving element as a result of the deceleration of the web material in the clamping area between the moving element and the first winding bearing.
    [00034] Additional advantageous features and modalities of the method and the machine according to the invention are described here below and in the appended claims, which form an integral part of the present description. Brief Description of Drawings
    [00035] The invention will be better understood by the description and drawing in the appendix below, which shows practical non-limiting modalities of the invention. More in particular, in the drawing:
    [00036] Fig.1 shows a side view and partial section according to a vertical plane of a rewinder according to the invention, limited to the winding head, in a first operational arrangement and in a first mode;
    [00037] Figures 2, 3 and 4 show enlarged views of the winding area in the exchange step, that is, the step of separating the material from the web upon completing the winding of a record and starting winding of a subsequent record;
    [00038] Fig.3A shows an enlarged view of Fig.3;
    [00039] Fig. 4A shows an enlarged view of Fig. 4;
    [00040] Fig.4B shows an enlarged view according to the rVB-IVB line of Fig.4A;
    [00041] Fig. 5 shows an enlarged view of the winding area in a step subsequent to those of Figures 2, 3 and 4;
    [00042] Fig. 6 shows an enlarged view of a portion of a first winding bearing in a section according to an orthogonal plane for the axis of rotation;
    [00043] Fig- 7 shows the rewinding machine of Fig. 1 in a transition step from a first winding mode without a core to a second winding mode around a winding core or a mandrel winding;
    [00044] Fig. 8 shows a view similar to Fig. 7 with the rewinding machine in the second operating mode; Fig. 10 shows a side view and partial section of a Fig. 11 shows a side view and partial section of a rewinder of Fig. 10 in an operating mode one for
    [00045] Fig- 9 shows a diagram illustrating the movements of the winding bearings;
    [00046] according to a vertical plane of a rewinding machine in second mode;
    [00047] part of producing registers without winding core;
    [00048] Fig. 12 shows the transition step of the rewinder of Fig. 11 from the operational arrangement to produce records without a winding core to the operational arrangement to produce records with a winding core;
    [00049] Fig. 13 shows a step of modifying the operational arrangement subsequent to the restoration in Fig. 12;
    [00050] Fig. 14 shows a view similar to Figures 11, 12 and 13 with the rewinder in the arrangement to produce records with a winding core or winding mandrel;
    [00051] Fig. 15 shows a section, according to several mutually intersecting planes, of the separating element, the concave plate and the second winding bearing according to line XV-XV of Fig. 11;
    [00052] Fig. 16 shows a modified mode of the rewinding machine according to the invention. Detailed Description of Modalities of the Invention
    [00053] A first embodiment of a rewinder according to the invention is shown in Figures 1 to 9. Fig. 1 shows the main elements of the rewinder, and in particular the elements intended to provide the winding cores (used when the machine is prepared to produce records with a winding core), the winding bearings and the web material separation system.
    [00054] The winding head is generally indicated with 1. In this embodiment, the winding head of the winding machine comprises a first winding bearing 3 with a rotating axis 3A, a second winding bearing 5 rotating about the rotation axis. rotation 5A and a third winding bearing 7 rotating about a third axis of rotation 7A. Between the two winding bearings 3 and 5 there is a defined contraction 11 for the passage of the web material.
    [00055] In some embodiments, the axis 3A of the first winding bearing 3 is fixed with respect to the structure bearing the load (not shown) of the machine. In other embodiments, the axis 3A can be heard with respect to the structure carrying the load.
    [00056] In some embodiments, the axis 5A of the second winding bearing 5 is movable. In some embodiments the axis 5A is moved exclusively to move from an operational mode, in which the rewinding machine produces registers without a winding core, to an operational mode, in which the machine produces registers with a winding core. In other preferred embodiments, the axis of rotation 5A of the second winding bearing 5 can be moved in a controlled manner also during each record winding cycle without a winding core, as will be explained in more detail below.
    [00057] As is evident later, the rewinding machine can be designed in such a way as to produce not only registers without winding core or mandrel, but also registers wound in the winding cores or central mandrels, which can have a variable diameter . The axis 5A of the second winding bearing can be movable to adapt the machine to the winding cores or mandrels of different diameters.
    [00058] In some embodiments, the roller 3 can be a 3A axis moving for the same reasons indicated above. In some embodiments, both winding bearings 3 and 5 can be moved and adjustable.
    [00059] The third winding bearing 7 is advantageously loaded, for example, by a pair of arms 9 pivoting with an alternative movement according to the double arrow f9 around a pivoting axis 9a. The movement according to the double arrow f9 allows the third winding bearing 7 to move to or out of the first winding bearing 3 and the second winding bearing 5 according to the diameter of the register L during the forming step inside the frame. winding defined by the three winding bearings 3, 5 and 7.
    [00060] Fig.l also shows an actuator, in this modality an electronically controlled electric motor 13 with a reducer 15, which controls the rotation of a threaded bar 15A and with it the movement, according to the double arrow fl5, of a radius of light 16 supporting the second winding bearing 5. By means of actuator 13, it is thus possible to move the winding bearing 5 to or out of the winding bearing 3, changing the dimension of the contraction 11 between said winding bearings .
    [00061] A concave plate 17 is arranged upstream of the contraction 11. In some embodiments the concave plate 17 is supported by the two articulation arms 18 articulated around the axis of rotation 5 A of the second winding bearing 5.
    [00062] As shown in greater detail in the expansions of Figures 2 to 5, in some embodiments the concave plate 17 has a concave surface 17A facing the cylindrical surface 3B of the first winding bearing 3. Furthermore, the concave plate 17 has teeth 17B which are inserted into the circumferential grooves 5B provided on the cylindrical surface of the second winding bearing 5, in order to define a substantially continuous surface for the register bearing in the first winding step, as will be explained in more detail below.
    [00063] At the opposite end, the concave plate 17 is provided with a comb-shaped entry edge 17C, as best illustrated in detail in Fig.4B and for the purposes described below.
    [00064] Between the concave surface 17A facing the winding bearing 3 of the concave plate 17 and the side surface 3B of the first winding bearing 3 a feed channel 19 d web material N is defined, which is guided around the first winding bearing 3 and wound to form in the subsequent winding cycles of a plurality of registers.
    [00065] The web material N path extending around the first winding bearing 3 and inside the channel 19 and then through the contraction 11 to feed the web material N into the winding frame formed by the winding bearings 3, 5 and 7.
    [00066] A moving element 21 cooperates with the concave plate 17 and the first winding bearing 3, whose moving element is configured and controlled to serve the web material and start winding the central core of a register without a core. winding.
    [00067] In some embodiments the moving element 21 comprises a series of integral arms 21A with a central axis 21B rotating about the axis of rotation 21C. The arms 21A can be replaced by a single continuous lever that extends the entire width of the machine.
    [00068] The arms 21A or the continuous lever carries a series of liners 23. In some embodiments the liners 23 are provided with projections 23A with surfaces 23B preferably having a cylindrical shape, that is, formed by portions of a cylindrical surface. The cylindrical surface must be designed in a geometric direction. It can preferably have a constant radius, with the center coinciding with the axis of rotation 21C of the moving element 21. In this case the surface of the projections 23 A will thus have a circular section. However, this is not strictly necessary. It should also be possible for the peripheral surface 23B of the projections 23A to have a variable radius and thus a non-circular section.
    [00069] The projections 23A are arranged mutually spaced in such a way as to be able to penetrate between the teeth the comb-shaped edge 17C of the concave plate 17 for the purposes best described below, as can be seen in detail in Fig.4B .
    [00070] In some embodiments, the surface 23B of the projections 23A may have a high coefficient of friction, for example, obtained by machining the surface of the material forming the projections 23A. In other preferred embodiments, the projections 23A are made of elastically yielding material, such as rubber, which can have a high coefficient of friction per se. High coefficient of friction is understood to be a coefficient of friction greater than that of the portions of the winding bearing 3 in which web material N is made to slide at least in some stages of the winding cycle, as also explained below.
    [00071] Two seats indicated with 25A and 25B are provided on the first winding bearing 3 (see in particular Figures 2, 3, 4 and 6). These seats have an extension preferably equal to the axial length of the winding bearing 3. In these two seats 25 A and 25B, two blocks 27 and 28 can be housed, which are removable or interchanged according to the operating mode in which the machine is required to operate. In Figures 2, 3, 4 and 6 the two blocks 27 and 28 housed in the seats 25A and 25B of the first winding bearing 3 are designed in such a way to optimize the operation of the machine in the winding operational mode without central core.
    [00072] In some advantageous embodiments, when they are mounted in their respective seats 25A and 25B, between the two blocks 27 and 28 a suction gap 29 is defined leveling on the surface of the winding bearing 3, in particular at the opposite edges of the blocks 27 and 28 that, once assembled, are at a slight distance from each other. Preferably, the suction slit 29 extends continuously for the entire useful length of the winding bearing 3. The suction slit 29 can advantageously be in flow connection with one or more suction holes 31 provided in the thickness of the winding bearing 3. The holes 31 place the slot 29 in connection with a compartment 3C within the winding bearing 3. Within the compartment 3C a vacuum can be created, by means known per se, sufficient to generate a suction flow through the slot 29 at least in the exchange step, that is, the step of completing the winding of a record and beginning of winding of the subsequent record. In other, less advantageous embodiments, the slot 29 can be discontinued or replaced by holes distributed along a line, preferably parallel to the axis of rotation 3 A of the winding bearing 3.
    [00073] In some advantageous embodiments the block 27 has an external surface 27A, whose shape differs from the cylindrical shape with a circular section of the side surface part of the winding bearing 3 not surrounded by the seats 25A and 25B housing the blocks 27 and 28.
    [00074] More in particular, the surface 27A of the block 27 is a cylindrical surface with a variable radius (in this way with a non-circular section) ranging from a maximum value at one edge 27B, at the suction slot 29, to the opposite edge 27C of block 27. In substance, block 27 has an outer surface 27A with a diameter gradually decreasing from the maximum value at the edge 27B until it preferably connects in an approximately tangential way with the part of the cylindrical surface with constant constant of the winding bearing 3 which it is behind block 27 in relation to the direction of rotation f3 of the winding bearing 3.
    [00075] The outer surface of block 28 may have two portions 28A, 28B, the first with a constant diameter and the second (28B) with an increasing radius that forms a ramp ascending to a point or longitudinal projection 28C of maximum radius and from from here it continues with a constant radius. The portion 28B ends at the suction slot 29 in an opposite position with respect to the edge 27B formed by the block 27, with a diameter equal to or slightly smaller than the maximum diameter of the surface 27A.
    [00076] The surface portion 28B can be made of a thin plate facing block 28, or also generated by the chip removal machining of the surface of a block 28 that initially has a larger diameter than the final diameter.
    [00077] The surface 27A of block 27 is preferably treated in such a way as to have a high coefficient of friction, for example, through mechanical machining or through an appropriate surface coating. Vice versa, the surface 28A, 28B of block 28 is smooth, that is, it has a lower coefficient of friction than the surface friction coefficient 27A, for the purposes that will be explained below.
    [00078] Preferably, in particular when the machine is designed to alternatively wind registers with and without a central winding core, the remaining part of the surface of the winding bearing 3 has annular bands with a low coefficient of friction alternating with annular bands with a high friction coefficient.
    [00079] The machine elements described above are used to produce L records of the coiled web material without a central core. The winding cycle is as follows.
    [00080] In Fig. 1 the machine is shown in a winding step of an L register that is in contact with the three winding bearings 3, 5 and 7. In this phase and in this exemplary mode the second winding bearing 5 flies away away, by a movement provided by the motor 13, from the first winding bearing 3 to move the two points of contact between the first Leo register and the second winding bearing 3 and 5, respectively, one away from the other. In other embodiments, the distance between centers of bearings 3 and 5 is not varied during the registration winding cycle, or is modified to a lesser extent.
    [00081] Once the L register has reached the desired dimension, for example, the desired diameter and / or the length of the required wound material, the moving element 21 is activated. The latter remains substantially fixed in the position shown in Fig. 1 for the entire winding cycle until action is required to separate the material from web N and start winding the initial central core of a second register around itself.
    [00082] In this exemplary mode, the moving element 21 is made to rotate according to the arrow f21 in an opposite direction to the rotation direction of the winding bearings 3, 5 and 7. The movement of the moving element 21 is controlled in such a way as to compress the web material N against the surface 28B of the larger diameter of block 28 when separation of the web material N is required upon winding completion of the first register L, which is located in the winding frame 3, 5 and 7. The movement is controlled in such a way that the peripheral speed of the moving element 21, that is, the speed of the surface 23B of the projections 23 A of each ceiling 23 of the moving element 21, is concordant, but lower, for example , 30 to 70% lower than the peripheral rotation speed of the first winding bearing 3 and thus to feed the speed of web material N. When web material N is compressed between the surface 28B of block 28 and the surface 23B of the projections 23A of the liners 23, it is locally decelerated, as the friction coefficient of the surfaces 23B of the projections 23A of the linings 23 is greater than the friction coefficient of the surfaces 28B of the block 28. As a result of compression and the speed difference between these elements, in the area of compressing the web material N makes the peripheral speed of the moving element 21, lower than the nominal feed speed of the web material N. As a result of the deceleration location of the web material web N, the latter is separated, preferably along a line of perforation produced in the material of web N in a manner known per se, at a point between the compression area and the newly formed L register, whose peripheral speed continues to be substantially the same as the rated feed speed of the web material.
    [00083] The separation of the material from the web generates a leading edge LC, which completes the winding in the completed L register, and a leading edge LT (Fig. 3A) from which the new record originates.
    [00084] As explained above, the pressure between the liners 23 and the soft surface with low friction coefficient 28B of block 28 and the speed difference between the elements, between which the web material N is compressed, causes local sliding of the portion of the web material N adjacent to the leading edge LT which is cylindrical formed from the first winding bearing 3 upstream of the contraction 11 between the winding bearings 3 and 5. The moving element 21 is pivoted about an axis 21C which is in a different position with respect to the position shown in Figures 1 to 9. In fact, in the latter the axis of rotation 21C of the moving element 21 is located under the first winding bearing 3, while in Figures 10 to 14 the axis of rotation 21C of the moving element 21 is positioned beyond the winding bearing 3, on the opposite side with respect to the third winding bearing 7.
    [000109] Furthermore, in this mode the concave frame 41 is supported by rotating around the axis of rotation 21C of the moving element 21. In this way, it moves from an inactive position (Figures 10 to 12) to an operational position (Fig 14) articulating around the 21C rotation axis. The joint is controlled by a piston-cylinder actuator 42.
    [000110] In some embodiments, a mechanical element 44 may also be provided, to facilitate the start of winding the web material N around the winding cores when the rewinding machine is in the arrangement of Fig. 14. The operation of element 44 does not will be described in greater detail as it is known per se and further details of its operation and structure can be found in publication US-A-2009/0272835. The auxiliary element can be used as an alternative for applying glue. The machine can be provided with element 44 only without the glue applicator, or it can comprise both to operate alternatively without or without glue. In other embodiments, element 44 can be omitted and the machine can be designed to operate exclusively with glue.
    [000111] Fig. 15 shows a section of the moving element 21 and the second winding bearing 5 along line XV-XV in Fig. 11. Fig. 15 shows the various components described above as well as an electric motor 22 for guide the moving element 21. The movement is transmitted from the motor 22 to the moving element 21 through a toothed belt 24 guided around toothed pulleys 26A, 26B.
    [000112] Fig. 16 shows a modified modality with respect to the modality shown in Figures 10 to 15. The difference between this modality and the previous one consists of the different shape of the moving element 21 and the different type of movement that it performs.
    [000113] In Fig. 16, the moving element 21 is not provided with a rotational movement about an axis 21C, but with reciprocal oscillatory and rotational movement around the said, as indicated by the double arrow f21. The moving element 21 rotates counterclockwise (in the figure) to contact the web material N and compress it against the cylindrical surface of the winding bearing 3 and to separate the web material. Subsequently, it reverses its rotation movement to return to the position shown with a broken line in Fig. 15 and during the inverted movement it follows the initial central core of the new register L1 towards channel 19 formed also in this case between the winding bearing 3 and the concave surface 17A of the concave plate 17. The moving element 21 in this configuration can be designed and controlled as described in Italian patent application No. FI2010A000025 and the corresponding international application PCT / IT2011 / 000037, the content of which is incorporated in the present description .
    [000114] Both, the moving element 21 of Fig. 16, and element 21 of the modality shown in Figures 10 to 15 are provided with a series of projections similar to the projections 23 A described with reference to Figures 1 to 9, cooperating with the comb edge 17C of plate 17, to allow transfer of the initial core of the L1 register towards channel 19.
    [000115] It is understood that the drawing shows only one example, provided merely as a practical demonstration of the invention, which can vary in its forms and dispositions, without, however, departing from the scope of the concept underlying the invention. Any reference numbers in the attached claims are provided to facilitate the reading of the claims with reference to the description and design, and do not limit the scope of protection represented by the claims.
    权利要求:
    Claims (30)
    [0001]
    1. Rewinding machine to produce web material records, characterized by the fact that it comprises a first winding bearing (3); a concave plate (17) extending around the first winding bearing (3), said first winding bearing and said concave plate defining a feed channel (19) of the web material (N); a feed path for the web material extending along said channel; upstream of said concave plate (17), a moving element (21) having a contraction surface (23B) cooperating with said first winding bearing (3) to compress the web material (N) against the first bearing of winding (3); wherein said moving element (21) is arranged and controlled to compress the web material against the surface of the first winding bearing (3) and decelerate the web material between the moving element (21) and the surface of the first winding bearing (3), causing a leading edge (LT) to wind around itself to form a winding core of a register (L; L1).
    [0002]
    2. Rewinding machine according to claim 1, characterized in that said moving element (21) is arranged and controlled to cause separation of the web material before the leading edge rotates around itself after to separate.
    [0003]
    Rewinding machine according to claim 1 or 2, characterized in that it comprises a second winding bearing (5), a contraction (11) being defined between said first winding bearing (3) and said second winding bearing (5), said concave plate (17) extending upstream of said contraction (11) and said feeding path to feed the web material (N) extending through said contraction (11).
    [0004]
    Rewinding machine according to any one of claims 1 to 3, characterized in that a peripheral winding frame (3, 5, 7) is arranged downstream of said concave plate (17).
    [0005]
    Rewinding machine according to any one of claims 1 to 4, characterized in that said moving element (21) is controlled in such a way that the contraction surface (23B) has a speed that, when said contraction surface is pressed against said first winding bearing (3), it is lower than the peripheral speed of the first winding bearing (3).
    [0006]
    Rewinding machine according to any one of claims 1 to 5, characterized in that said concave plate (17) defines an entrance edge (17C) cooperating with said movement element (21) to form a surface transfer means for winding the initial winding core of the moving element register to said concave plate (17).
    [0007]
    7. Rewinding machine according to claim 6, characterized in that said entrance edge (17C) of the concave plate (17) has a comb shape cooperating with a plurality of projections (23A) of said movement element , said projections (23A) penetrating the comb structure of the edge (17C) of the concave plate (17).
    [0008]
    Rewinding machine according to claim 3 or 7, characterized in that said projections (23A) form said contraction surface (23B) of the moving element (21).
    [0009]
    Rewinding machine according to any one of claims 1 to 8, characterized by the fact that said first winding bearing (3) comprises a lateral surface defining the longitudinal projection (28C), extending parallel to the axis of said first winding bearing (3) and projecting radially with respect to the cylindrical surface of the first winding bearing (3).
    [0010]
    Rewinding machine according to claim 9, characterized by the fact that adjacent to said longitudinal projection (28C) and behind it with respect to the direction of rotation, said first winding bearing (3) has a portion of the first surface side (27A) with a diameter gradually decreasing from said projection (28C) and ending tangentially to a cylindrical surface defining a second side surface portion of the first winding bearing (3), said cylindrical surface defining said second side surface portion of the winding bearing having a substantially constant ratio.
    [0011]
    Rewinding machine according to claim 9 or 10, characterized in that said first winding bearing (3) comprises, at the side surface and in the vicinity of said longitudinal projection (28C), at least one suction opening (29).
    [0012]
    Rewinding machine according to claim 11, characterized in that the said suction opening (29) has the form of a slit extending parallel to the axis (3A) of the first winding bearing (3) and for the said longitudinal projection (28C).
    [0013]
    Rewinding machine according to any one of claims 9 to 12, characterized in that said longitudinal projection (28C) is formed in a first removable block (28), separated in a seat (25B) of the first bearing of winding (3).
    [0014]
    Rewinding machine according to claim 13, characterized in that adjacent to said first removable block (28) and behind it with respect to the direction of rotation of the first winding bearing (3) a second removable block (27) is willing.
    [0015]
    Rewinding machine according to claim 12 or 14, characterized in that said suction opening (29) is formed between adjacent edges of said first removable block (28) and said second removable block (27).
    [0016]
    Rewinding machine according to any one of claims 13 to 15, characterized in that said second removable block (27) has an external surface with a higher coefficient of friction than the friction coefficient of the surface of the first removable block (28).
    [0017]
    17. Rewinding machine according to any one of claims 1 to 16, characterized by the fact that said concave plate (17) is movable between an operational position, in which it defines said feeding channel (19) of the material of the web (N), and an inert position, in which it is placed at a distance from the first winding bearing (3).
    [0018]
    18. Rewinding machine according to claim 17, characterized in that the said concave plate (17) is movable between one of the said operational and inactive positions with a rotation movement around the axis of the second bearing of winding.
    [0019]
    19. Rewinding machine according to any one of claims 1 to 18, characterized in that it comprises a concave frame (41) positioned around said first winding bearing (3), alternatively for said concave plate (17) , said concave frame (41) having a higher curvature ratio than the curvature ratio of said concave plate (17).
    [0020]
    20. Rewinding machine according to claim 19, characterized in that said concave frame (41) is movably mounted to alternatively take an operational position, in which it is arranged around the first winding bearing to define a channel feed material from the web, and an inert position.
    [0021]
    21. Rewinding machine according to any one of claims 1 to 20, characterized in that said moving element (21) has a separate movement from said concave plate (17).
    [0022]
    22. Method for winding web material records (N) without a rewinding core, characterized by the fact that it comprises the steps of: feeding a web material around a first winding bearing (3); winding a first register (L); upon completion of the winding of said first register (L), separate the web material (N) by means of a moving element (21), forming a free flat edge (LC) of the first register (L) and a leading edge free (LT) of a second record (21); winding around itself an initial portion of said web material (N), adjacent to said free leading edge (LT), between the surface of the first winding bearing (3) and said moving element (21), forming an initial core of said second record (L1); transferring said initial core of the second register (L1) of the moving element (21) to a channel (19) defined between the first winding bearing (3) and a concave plate (17) extending around said first bearing of winding (3); feeding said initial core of the second register (L1) by winding it along said channel (19) in contact with said concave plate (17) and said first winding bearing (3), continuing to wind the web material ( N) around it.
    [0023]
    23. Method according to claim 22, characterized by the fact that said web material (N) is separated by means of said moving element (21) as a result of the deceleration of the web material (N) in the compressing area between the moving element (23) and the first winding bearing (3).
    [0024]
    24. Method according to claim 22 or 23, characterized in that it comprises the step of transferring said initial core from the second register (L1) of the channel (19) to a contraction (11) defined between said first bearing of winding (3) and a second winding bearing (5).
    [0025]
    25. Method according to claim 24, characterized by the fact that it comprises the step of feeding said initial core of the second register (L1) through said contraction (11) towards the winding frame (3, 5, 7) downstream of said contraction (11) and continuing to wind the second register in said winding frame (3, 5, 7).
    [0026]
    26. Method according to any one of claims 22 to 25, characterized by the fact that during the separation of the web material (N) and the beginning of the formation of said initial core of the second register (L1), the concave plate (17 ) remains substantially stationary and the moving element (21) moves towards the concave plate (17).
    [0027]
    27. Method according to any one of claims 22 to 26, characterized in that it comprises the step of retaining the web material by suction on the first winding bearing in the vicinity of the leading edge (LT).
    [0028]
    28. Method according to any one of claims 22 to 27, characterized in that it comprises the step of adjusting the height of said channel during the rolling of the initial core of the second register (L1) along said channel (19).
    [0029]
    29. The method according to any one of claims 22 to 28, characterized in that it comprises the step of defining, between said moving element (21) with said first winding bearing (3) a space to start winding said initial nucleus, said space being gradually increased to allow the diameter of the initial nucleus to increase until transferring the initial nucleus to said channel (19).
    [0030]
    30. Method according to claim 29, characterized in that said space is defined between a contraction surface (23) of said moving element (21) and a cylindrical surface portion (27A) with non-circular cross section of the first winding bearing (3), said surface portion (27A) having a diameter gradually decreasing.
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    同族专利:
    公开号 | 公开日
    EP2694414B1|2016-10-19|
    US20140054407A1|2014-02-27|
    ITFI20110061A1|2012-10-09|
    PL2694414T3|2017-03-31|
    US9365379B2|2016-06-14|
    JP5969002B2|2016-08-10|
    KR20140045344A|2014-04-16|
    BR112013025922A2|2016-12-20|
    JP2014510000A|2014-04-24|
    RU2582342C2|2016-04-27|
    MX2013011641A|2014-03-27|
    MX345960B|2017-02-28|
    ES2609967T3|2017-04-25|
    RU2013149851A|2015-05-20|
    CN103534185A|2014-01-22|
    WO2012136735A1|2012-10-11|
    CA2832262A1|2012-10-11|
    CN103534185B|2016-03-30|
    KR101887250B1|2018-08-09|
    EP2694414A1|2014-02-12|
    CA2832262C|2019-02-05|
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    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-03-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-07-21| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-11-17| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 04/04/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    IT000061A|ITFI20110061A1|2011-04-08|2011-04-08|"REWINDING MACHINE AND METHOD FOR THE PRODUCTION OF ROLLS OF RIBBED MATERIAL"|
    ITFI2011A000061|2011-04-08|
    PCT/EP2012/056231|WO2012136735A1|2011-04-08|2012-04-04|Rewinding machine and method for producing logs of web material|
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