EP4355673B1 - Unwinder and operating method for unwinding web materials from parent reels - Google Patents

Unwinder and operating method for unwinding web materials from parent reels Download PDF

Info

Publication number
EP4355673B1
EP4355673B1 EP22735632.6A EP22735632A EP4355673B1 EP 4355673 B1 EP4355673 B1 EP 4355673B1 EP 22735632 A EP22735632 A EP 22735632A EP 4355673 B1 EP4355673 B1 EP 4355673B1
Authority
EP
European Patent Office
Prior art keywords
reel
parent
web
unwinder
guide surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP22735632.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP4355673A1 (en
Inventor
Fabio Perini
Emanuele MORICONI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Futura SpA
Original Assignee
Futura SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Futura SpA filed Critical Futura SpA
Priority to RS20250589A priority Critical patent/RS66945B1/sr
Publication of EP4355673A1 publication Critical patent/EP4355673A1/en
Application granted granted Critical
Publication of EP4355673B1 publication Critical patent/EP4355673B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/105—Opening of web rolls; Removing damaged outer layers; Detecting the leading end of a closed web roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/12—Lifting, transporting, or inserting the web roll; Removing empty core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1805—Flying splicing, i.e. the expiring web moving during splicing contact
    • B65H19/1826—Flying splicing, i.e. the expiring web moving during splicing contact taking place at a distance from the replacement roll
    • B65H19/1836—Flying splicing, i.e. the expiring web moving during splicing contact taking place at a distance from the replacement roll the replacement web being accelerated or running prior to splicing contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1857—Support arrangement of web rolls
    • B65H19/1863—Support arrangement of web rolls with translatory or arcuated movement of the roll supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/20—Cutting-off the expiring web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/413—Supporting web roll
    • B65H2301/4134—Both ends type arrangement
    • B65H2301/41346—Both ends type arrangement separate elements engaging each end of the roll (e.g. chuck)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/413—Supporting web roll
    • B65H2301/4136—Mounting arrangements not otherwise provided for
    • B65H2301/41361—Mounting arrangements not otherwise provided for sequentially used roll supports for the same web roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/413—Supporting web roll
    • B65H2301/4137—Supporting web roll on its outer circumference
    • B65H2301/4138—Supporting web roll on its outer circumference belt arrangement
    • B65H2301/41384—Supporting web roll on its outer circumference belt arrangement arranged in non-stationary manner, i.e. changing according to actual roll diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/417—Handling or changing web rolls
    • B65H2301/4171—Handling web roll
    • B65H2301/4172—Handling web roll by circumferential portion, e.g. rolling on circumference
    • B65H2301/41724—Handling web roll by circumferential portion, e.g. rolling on circumference by crane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/461—Processing webs in splicing process
    • B65H2301/4611—Processing webs in splicing process before splicing
    • B65H2301/46115—Processing webs in splicing process before splicing by bringing leading edge to splicing station, e.g. by chain or belt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/25—Driving or guiding arrangements
    • B65H2404/255—Arrangement for tensioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/25—Driving or guiding arrangements
    • B65H2404/256—Arrangement of endless belt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/12—Means using fluid made only for exhausting gaseous medium producing gas blast
    • B65H2406/122—Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/31—Suction box; Suction chambers

Definitions

  • the present invention relates to an unwinder and an operating method for unwinding web materials from parent reels.
  • Such unwinders and methods are known from e.g. US 2009/114757 A1 .
  • the present invention can be applied to the unwinding of paper webs from parent reels in processing plants for the production of paper rolls such as toilet paper rolls, rolls of so-called "kitchen towels” and similar products, in which the feeding of the paper webs to the converting machines located downstream takes place continuously in order not to interrupt the production even when an exhausted parent reel is replaced by a new parent reel.
  • the unwinders are generally provided with devices which allow to join the end part of the paper material unwound from the parent reel being exhausted with the initial part of the paper material wound on the new parent reel.
  • the present invention relates, in fact, to the operations connected to the joining of the end part of the web material unwound from the parent reel in the exhaustion phase with the initial part of the web material wound on the new parent reel, i.e. the replacement of an exhausted parent reel reel with a new parent reel, without interrupting the feeding of the paper material to the machines arranged downstream of the unwinder.
  • the present invention aims to simplify the structure, operation and operative use of the unwinders used in paper roll production plants.
  • an apparatus according to the present invention is an unwinder according to claim 8.
  • said structure comprises a base platform (3) with two sides (30) between which a first motorized belt (31) is positioned, arranged along a corresponding first closed path around a plurality of guide rollers (32, 33, 34), one of which (33) is controlled by an electric motor (3M).
  • a guide roller (34) is mounted transversely on two front arms (37) of the platform (3), which arms (37) are hinged with horizontal axis "H" each to a respective side (30) and are connected to an actuator (not visible in the drawings) which allows said arms to be rotated around said axis (H) as the diameter of the first parent reel (1) present in the first position (P1) decreases.
  • the arms (37) are belt-tightening arms for the first motorized belt (31) and are progressively rotated towards the first position (P1) as the diameter of the first reel (1) decreases.
  • a blade (B) In a position in front of the guide roller (34) there is a blade (B), the function of which is described below, which extends transversely between said arms (37).
  • the motorized belt (31) has an upper section (310), a lower section (311) and lateral sections which close the circuit followed by the motorized belt itself, whose direction of movement is indicated by the arrows " C" in the attached drawings.
  • the motorized belt (31) acts as a driving member for the parent reel (1) in its operating position (P1), that is, in the position normally occupied by the parent reel (1) until it is exhausted.
  • the motorized belt (31) can be doubled, in the sense that it can be realized as a double belt composed of two belts placed side by side as shown in Figs. 18-19 .
  • the reference “N1" indicates the paper web which unwinds from the parent reel (1) and the arrows "F1" indicate the direction followed by the paper web (N1).
  • the operating position (P1) is defined by a support (35) formed on an upper side of the platform (3).
  • the support (35), arranged on both sides (30) of the platform (3), is preferably a concave support, with the concavity turned upwards, to receive the pins (10) normally inserted in the central core of the reel (1), from which the same pins project axially both to be engaged by the bridge crane (CP) described below, and to allow the reel (1) to rotate around its own axis when it is placed on the support (35).
  • a lever (36) for locking/unlocking the respective pin (10) is associated with the support (35).
  • the lever (36) defines, in cooperation with the concavity of the support (35), a seat with a substantially circular cross-section in which the pin (10) is free to rotate but cannot translate, said seat being open or closed according to the position of the lever (36): when the seat of the pin (10) is open, a parent reel can be positioned on the support (35) and can be removed from the support itself, while when said seat is closed, a parent reel positioned on the support (35) is locked in the operating position (P1) but is free to rotate around its own axis, that is, around the axis of the pins (10).
  • an arm (4) which supports a second motorized belt (41) arranged along a second path closed around a plurality of guide rollers (42, 43), one of which (43) is motorized.
  • the reference “M43" in Fig. 18 and Fig.19 indicates an electric motor that drives the roller (43).
  • the arm (4) is linked to the front appendix (A3) of the platform (3) by means of a hinge with axis (X) perpendicular to the appendix (A3) itself.
  • the arm (4) with the second motorized belt (41) supported by this arm, can be made to rotate around the said axis (X) by means of a respective actuator (M4) from and towards the area above the operating position (P1) of the parent reel (1) as schematically shown by the arrow "K" in Fig.12 .
  • the arm (4) can be made to rotate by a motorized pinion (4P) meshing with an arcuated rack (4C) applied on the arm (4).
  • the arm (4) also supports a third motorized belt (44) closed in a ring on a motorized roller (43) of the second belt (41), from which its motion derives, and on further guide rollers (45).
  • the third motorized belt (44) constitutes an extension of the second belt (41) which reaches the nip (PN) of a ply-bonding unit.
  • the latter is formed by a plurality of a ply-bonding wheels (M1) and a counter-roller (M2) oriented transversely with respect to the direction (F1) followed by the web (N1) which unwinds from the parent reel (1) placed in the operating position (P1).
  • the ply-bonding unit is designed to mechanically join the paper webs (N1, N2) which unwind from the first and second parent reels in a step of replacing the first parent reel with the second parent reels further described below.
  • the reference “410” denotes the internal side of the second motorized belt, that is, the side of the latter facing the inside of the unwinder (U), while the reference “440” denotes the internal side of the third motorized belt, i.e. the side of the latter facing the nip (PN) of the ply-bonding unit.
  • the ply-bonding wheels have a knurled surface or are in any way machined so as to exhibit reliefs in correspondence with predetermined parts of their surface and, in known ways, in cooperation with the counter-roller (M2) they determine the mechanical joining of two paper webs which transit simultaneously through the nip (PN) while the ply-bonding wheels are pushed towards the counter-roller.
  • the ply-bonding wheels (M1) are normally spaced from the counter-roller (M2) by elastic members arranged in the ply-bonding unit and are pushed towards the counter-roller (M2) by a pneumatic actuator (MP) for obtaining the ply-bonding of the webs that pass through the nip (PN).
  • MP pneumatic actuator
  • the ply-bonding unit described above constitutes an example of realization of a zone for joining the paper webs (N1, N2) unwound from the parent reels (1, 2), arranged in correspondence with an exit (H) of the webs (N1, N2) from the unwinder.
  • the second and third motorized belts constitute a guiding surface (41, 44) which guides the second paper web towards said joining zone.
  • an idle or motorized roller is arranged immediately upstream of the nip (PN), oriented parallel to the nip itself, which supports the web (N1) unwound from the first parent reel (1).
  • a second position (P2) is formed in which a second parent reel (2) can be placed, intended to replace the first parent reel (1) which is in the operating position (P1) when the diameter of the first parent reel reaches a predetermined minimum value.
  • transfer means are arranged and acting, for transferring the second parent reel (2) from the second position (P2) to the first position (P1).
  • said transfer means comprise two concave supports (5) with the concavity facing upwards, each of which is arranged on a carriage (50) which can be moved along a respective guide column (51) placed next to a corresponding side (30) of the platform (3).
  • the carriages (50) are moved along the columns (51) by respective ball screws or driving screws operated by an electric motor (not visible in the drawings).
  • the supports (5) are mounted horizontally sliding on an upper side of the respective carriages (50).
  • the horizontal movement (5M) of the supports (5) is controlled by corresponding actuators (51) also arranged on the upper side of the supports (5).
  • the supports (5) are in the extracted position, as in Fig.
  • the first position (P1) is in correspondence with the front side of a guide (6) on which a carriage (60) is mounted which can be moved along the same guide (6) by means of a chain (6B) controlled by a corresponding actuator (6M), as indicated by the double arrow "F6".
  • the guide (6) is formed by two plates (61) each placed on the side of a respective side (30) of the platform (3).
  • the plates (61) have a front side, in correspondence of said first position (P1), and a rear side in correspondence of said third position (P3).
  • this rotation mechanism of the guide (6) comprises two pneumatic actuators (6A), each placed on a respective side (30) and each of which activates a cam (6C) intended to interact with a roller (6D) mounted on a corresponding side of the plate (61).
  • the arrow "F6” indicates the clockwise rotation of the guide (6) around the axis (K), while the arrow “G6” indicates the stroke of the carriage (60) towards the front side of the same guide.
  • the arrow “H6” indicates the anticlockwise rotation of the guide (6) while the arrow (L6) represents the stroke of the carriage (60) towards the rear side of the guide itself.
  • the actuators (6A) control the rotation of the plates (61), i.e. of the guide (6), around the axis (K), while the belts (6B) control the stroke of the carriage (60) along the same guide.
  • the carriage (60) is formed by two plates, each of which is constrained to a respective chain (6B) of the guide (6).
  • Each of the plates forming the carriage (60) is provided with sliding pads (not visible in the drawings) able to slide in a rectilinear guide (6E) arranged on a respective plate (61) of the guide (6).
  • a concave seat (63) is formed on the upper side of the plates (62), with the concavity facing upwards, for receiving a pin of a parent reel arranged in the operating unwinding position (P1).
  • the carriage (60) therefore allows to engage the parent reel present in position (P1) and transport it to the rear side (P3) of the guide (6) when the parent reel present in position (P1) must be replaced with the one set in the waiting position (P2).
  • said guide (6) is inclined, with the front side lower than the rear side, in such a way that its rear side is more raised, facilitating the gripping of the exhausted parent reel (1) by the bridge crane (CP ) in position (P3).
  • the supports (35) are the outermost elements and the levers (36) are each arranged next to the respective support (35), on the inside of the latter (side facing the double belt 31).
  • the plates (61) of the guide (6) are mounted on the external sides of the sides (30), i.e. on the side of these facing the respective levers (36).
  • the plates forming the carriage (60) and the belts (6B) are mounted on the internal side of the plates (61), i.e. on the side of these facing the double belt (31).
  • the carriages (50) consist of plates mounted on guides (52) formed on the internal side of the columns (51), i.e. on the side of these facing the double belt (31).
  • Each carriage (50) moves, on the respective column (51), in a space comprised between a respective plate of the carriage (60) and the corresponding arm (37).
  • the latter is more internal, i.e. closer to the central part of the unwinder, part which is occupied by the double belt (31). Therefore, starting from the outside of the unwinder and proceeding inwards, in correspondence with the position (P1) there are, for each side of the unwinder: the support (35), the lever (36), the plate (61) of the guide (6), the carriage plate (60) and the arm (37); and the space between the plate of the trolley (60) and the arm (37) is crossed by the carriage (50).
  • the unwinder (U) comprises pneumatic means adapted to approach the web (N2) of the reel arranged in the waiting position (P2) to the inner side (410) of the second motorized belt (41).
  • said pneumatic means can consist of nozzles (7) fed with compressed air, arranged on the platform (3) and oriented towards the second motorized belt (41).
  • said pneumatic means can consist of a suction box (8) arranged on the rear side of the second motorized belt (41), i.e.
  • Fig. 15 differs from that illustrated in Figs. 1-8 only in the different embodiment of the pneumatic means which determine the adhesion of the web (N2) to the guiding surface (41, 44).
  • the free edge of the web (N2) can be pneumatically made to adhere to the second motorized belt (41) in the exchange phase of the parent reels (1, 2), i.e. when the reel set in position (P2) must replace the reel present in position (P1).
  • the second motorized belt (41) consists of a plurality of side-by-side belts (400) of reduced width with respect to the length of the reels (1, 2), i.e. of reduced width with respect to the width of the paper webs (N1, N2 ), spaced along the guide rollers (42, 43) so as to leave a free space (401) between one belt (400) and the other, as schematically represented in Fig. 13 .
  • the free space (401) between the belts (400) favors the action of the pneumatic means used to obtain the adhesion of the web (2) to the guiding surface (41, 44).
  • the third motorized belt (44) can also be realized as a plurality of side-by-side belts of reduced width with respect to the width of the belts (N1, N2) similarly to what has been said for the second motorized belt (41).
  • the second motorized belt (41) and the third motorized belt (44) constitute an example of embodiment of a guiding surface for the web (N2) in the phase of insertion of the latter in the joining area of the webs (N1 , N2) which, in the example described above, consists of the ply-bonding unit (M1, M2).
  • the pneumatic means (7, 8) assist the action of the guiding surface (41, 44) allowing the web (N2) to adhere to the same surface when the reel set in position (P2) has to replace the present reel in position (P1).
  • a possible exchange cycle of the parent reels (1, 2) in an unwinder according to the present invention is as follows.
  • a parent reel (1) While a parent reel (1) is in the unwinding operating position (P1) and feeds the respective web material (N1) to the machines that use it, another parent reel (2) is led to the above waiting position (P2) by the bridge crane (CP) which deposits the respective pins (20) on the supports (5) arranged in this position by the carriage (50) and subsequently releases the pins (20) and moves away from the unwinder.
  • the parent reel (2) is oriented in such a way as to present the free edge (L2) of the respective web (N2) facing forward, so that this edge is in front of the second motorized belt (41) when the bridge crane positions the new parent reel (2) on the supports (5).
  • the rotation of the parent reel (1) is determined by the first motorized belt (31).
  • the rotation speed of the same is reduced, with a consequent reduction in the feeding speed of the respective web and, with known methods, the speed of the machines using that web is also reduced.
  • the supply of compressed air from the nozzles (7) is activated as schematically illustrated in Fig. 2 and Fig. 3 where the dotted lines represent the flow of air exiting the nozzles (7) and directed towards the second motorized belt (41).
  • the second motorized belt (41) is activated and the arm (4) is rotated to bring the second motorized belt (41) into contact with the parent reel (2) arranged on the supports (5) in the waiting position (P2) .
  • the reel (2) present on the supports (5) is rotated, as indicated by the arrow "R2" in Fig. 3 , and, due to the thrust exerted from the air supplied by the nozzles (7) or from the suction exerted by the suction box (8), the free edge (L2) of the belt (N2) adheres to the second motorized belt which guides it towards the third motorized belt (44) and the ply-bonding unit (M1, M2).
  • the web (N1) which unwinds from the reel (1) in the run-out phase continues to cross the space between the ply-bonding wheels and the counter-roller (M1, M2) and the carriage (60) is brought to the position (P1).
  • the ply-bonding wheels and the counter-roller (M1, M2) are brought against each other, so as to join the webs (N1, N2) unwound simultaneously from the reels (1, 2), after which the web (N1) of the reel (1) is cut.
  • the blade (B) which intervenes on the web (N1) to cut it in this phase is arranged in a predetermined position along the path of the web (N1) upstream of the ply-bonding unit (M1, M2), as schematically shown in Fig.4 where the references "T1" and "L1" represent the tail of the paper web (N1) directed towards the ply-bonding unit and respectively the edge of the paper web which remains on the exhausted reel (1).
  • the blade (B) is advantageously mounted on the arms (37) because, in this way, its position varies with the rotation of these arms and, therefore, varies with the diameter of the first reel (1).
  • the paper web that comes out from the ply-bonding unit (M1, M2) is identified by both references “N1" and "N2" because in this phase both the webs come out from the unwinder.
  • After joining the webs (N1, N2) and cutting the web (N1), from the unwinder comes out only the web (N2) of the reel (2) that has not yet been placed in the operating unwinding position (P1), as schematically represented in Fig. 5 .
  • the carriage (60) which has been brought under the exhausted reel (1), engages the latter and transports it to the third position (P3) along the guide (6) by performing the movements (F6, G6, H6, L6) previously described, and the arms (37) are rotated to distance them from the first position (P1), as shown in Fig.6 and Fig.7 .
  • the carriage (50) transports the reel (2) on the supports (35) in the operative position (P1), as shown in Fig.8 (in which for graphic simplification the carriage 50 and the columns 51 are not shown).
  • the first motorized belt (31) determines its rotation, after which the arm (4) is returned to its initial position.
  • the ply-bonding wheels (M1) once their function is no longer required, have been returned to their starting configuration spaced from the counter-roller (M2).
  • the exhausted parent reel is picked up by the bridge crane (CP) and transported out of the unwinder. The process described above is repeated cyclically. The replacement of the exhausted parent reel (1) with the parent reel (2) which takes its place takes place without interrupting the feeding of paper to the machines that use it.
  • the machines that use the material (N1; N2) coming out of the unwinder (U) are an embosser (E) and a rewinder (RW) that receives the material (N1, N2) processed by the embosser (E) and uses it to produce logs of paper material from which rolls of toilet paper are obtained according to a plant and functional configuration known per se.
  • the adhesion of the web (N2) to the second motorized belt (41) is determined by the suction operated through the suction box.
  • an unwinder and a method according to the present invention are equally applicable to the case of non-paper web materials, such as for example non-woven webs. From the foregoing description it is evident that an unwinder according to the present invention allows to implement a method for unwinding web materials (N1, N2) from two corresponding parent reels (1, 2), wherein a first parent reel (1) in a depletion phase is replaced by a second parent reel (2) which takes the place of the first parent reel at the end of the replacement, wherein during said replacement a first and a second web material (N1, N2) is unwound from both parent reels, wherein before the completion of said replacement the first web material (N1) is joined to the second web material (N2) and then it is cut, wherein the joining of said web-like materials (N1, N2) is preceded by a step of inserting the second web material (N2) in an area where the two web materials (N1, N2) are joined, wherein during the step of inserting the second web material (N2) in said joining area the second web
  • the second parent reel (2) before carrying out said replacement, can be placed in a temporary waiting and unwinding position (P2) above another position (P1) occupied by the first reel (1). Furthermore, in accordance with the embodiment described above, the first reel (1) is rotated by a motorized belt (31) acting by contact on the first reel in the position (P1) occupied by the latter.
  • the guiding surface (41, 44) can be constituted by motorized belts which, while guiding the second web (N2) towards the said joining area, determine the rotation of the second reel (2) around its own axis.
  • the adhesion of the second web (N2) to the guiding surface (41, 44) can be carried out by means of compressed air supplied by nozzles (7) oriented towards this surface or by suction operated through the guiding surface itself by means of a suction box (8).
  • the unwinder described above is an unwinder comprising:
  • said guide surface (41, 44) is a movable surface supported by an arm (4) controlled to arrange the same guide surface (41, 44) in contact with the reel (2) present in the waiting position (P2) to drag it into rotation around its axis.
  • said positions (P1, P2, P3) are formed by concave supports with the concavity facing upwards
  • a support (5) is formed on a carriage (50) which can be moved alternatively between the waiting position (P2) and the operating position (P1)
  • a support is formed on another carriage (60) which can be moved alternately between the removal position (P3) and the operating position (P1).
  • said pneumatic means are formed by nozzles (7) fed with compressed air and oriented towards said guide surface (41, 44) or by a suction box (8) placed on a rear side of the guide surface (41, 44).
  • said means for joining the web-like materials comprise a ply-bonding unit (M1, M2).
  • the unwinder comprises cutting means suitable for cutting the web unwound from the reel (1) which occupies the operating position (P1).

Landscapes

  • Replacement Of Web Rolls (AREA)
EP22735632.6A 2021-06-15 2022-06-11 Unwinder and operating method for unwinding web materials from parent reels Active EP4355673B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RS20250589A RS66945B1 (sr) 2021-06-15 2022-06-11 Odmotavač i radni postupak za odmotavanje trakastih materijala sa matičnih koturova

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102021000015542A IT202100015542A1 (it) 2021-06-15 2021-06-15 Svolgitore e metodo operativo per svolgere materiali nastriformi da bobine madri.
PCT/IT2022/050167 WO2022264180A1 (en) 2021-06-15 2022-06-11 Unwinder and operating method for unwinding web materials from parent reels

Publications (2)

Publication Number Publication Date
EP4355673A1 EP4355673A1 (en) 2024-04-24
EP4355673B1 true EP4355673B1 (en) 2025-04-30

Family

ID=77627388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22735632.6A Active EP4355673B1 (en) 2021-06-15 2022-06-11 Unwinder and operating method for unwinding web materials from parent reels

Country Status (9)

Country Link
US (1) US20240199361A1 (pl)
EP (1) EP4355673B1 (pl)
BR (1) BR112023019804A2 (pl)
ES (1) ES3033209T3 (pl)
FI (1) FI4355673T3 (pl)
IT (1) IT202100015542A1 (pl)
PL (1) PL4355673T3 (pl)
RS (1) RS66945B1 (pl)
WO (1) WO2022264180A1 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240317525A1 (en) * 2023-03-24 2024-09-26 New Era Converting Machinery, Inc. Dual position automatic winder

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5906333A (en) * 1997-04-16 1999-05-25 Paper Converting Machine Company Center drive unwind system
ITFI20030065A1 (it) * 2003-03-13 2004-09-14 Perini Fabio Spa Dispositivo svolgitore per bobine di materiale nastriforme con organi di accumulo temporaneo del materiale svolto nella fase di cambio bobina e relativo metodo
ITFI20050010A1 (it) * 2005-01-18 2006-07-19 O M Futura S P A Metodo e dispositivo per l'esecuzione automatica del cambio bobina in uno svolgitore
ITFI20110253A1 (it) * 2011-11-23 2013-05-24 Perini Fabio Spa "svolgitore per bobine e metodo di svolgimento"

Also Published As

Publication number Publication date
IT202100015542A1 (it) 2022-12-15
EP4355673A1 (en) 2024-04-24
FI4355673T3 (fi) 2025-06-18
PL4355673T3 (pl) 2025-08-04
ES3033209T3 (en) 2025-07-31
RS66945B1 (sr) 2025-07-31
WO2022264180A1 (en) 2022-12-22
US20240199361A1 (en) 2024-06-20
BR112023019804A2 (pt) 2024-01-16

Similar Documents

Publication Publication Date Title
RU2605344C2 (ru) Разматыватель для рулона и способ размотки
EP2142456B1 (en) Apparatus and method for breaking a web
JP5933564B2 (ja) ウェブ材料のロールを製造する巻取り機及び方法
US7909282B2 (en) Center/surface rewinder and winder
EP2797825B1 (en) Unwinder of reels of web material
EP3243777B1 (en) Machine and method for the winding of strips of web material with means for transversal cutting of the strips and anchoring of the strips to the winding core
JPS6259024B2 (pl)
ITMI20012274A1 (it) Ribobunatrice automatica particolarmente per film flessibile di materiale plastico e relativo metodo di produzione di rotoli
EP4355673B1 (en) Unwinder and operating method for unwinding web materials from parent reels
ITPI20080058A1 (it) Apparato, e relativo metodo, per la trasformazione di nastri adiacenti di materiale flessibile.
AU2008243899B2 (en) Apparatus and method for breaking a web
ITMI992293A1 (it) Dispositivo di introduzione di un'anima di avvolgimento in una macchina ribobinatrice
IT201900003205A1 (it) Un dispositivo per la sostituzione di bobine in uno svolgitore e relativo metodo
JPH0539150A (ja) ウエブ巻取機および方法
EP2758328A2 (en) Simultaneous winding of tissue webs

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20230921

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

INTG Intention to grant announced

Effective date: 20250221

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602022013955

Country of ref document: DE

REG Reference to a national code

Ref country code: FI

Ref legal event code: FGE

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FI

Payment date: 20250627

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20250618

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: RS

Payment date: 20250612

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20250627

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20250721

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20250618

Year of fee payment: 4

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 3033209

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20250731

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20250430

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1789896

Country of ref document: AT

Kind code of ref document: T

Effective date: 20250430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250901

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20250731

Year of fee payment: 4

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250730

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250430

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: TR

Payment date: 20250721

Year of fee payment: 4

Ref country code: PL

Payment date: 20250611

Year of fee payment: 4

Ref country code: IT

Payment date: 20250630

Year of fee payment: 4

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250430

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250430

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: RO

Payment date: 20250722

Year of fee payment: 4

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250830

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250430