EP3272512A1 - Verbesserte prägeanordnung für folienmaterial und entsprechendes automatisches prägewalzenwechselsystem - Google Patents

Verbesserte prägeanordnung für folienmaterial und entsprechendes automatisches prägewalzenwechselsystem Download PDF

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Publication number
EP3272512A1
EP3272512A1 EP17181678.8A EP17181678A EP3272512A1 EP 3272512 A1 EP3272512 A1 EP 3272512A1 EP 17181678 A EP17181678 A EP 17181678A EP 3272512 A1 EP3272512 A1 EP 3272512A1
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EP
European Patent Office
Prior art keywords
rollers
embossing
roller
side panels
machine
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.)
Granted
Application number
EP17181678.8A
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English (en)
French (fr)
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EP3272512B1 (de
Inventor
Luca TAGLIASACCHI
Giovanni Bertoli Barsotti
Roberto BIAGIONI
Michele Fontana
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.)
Paper Converting Machine Co Italia SpA
Original Assignee
Paper Converting Machine Co Italia 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.)
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Publication date
Application filed by Paper Converting Machine Co Italia SpA filed Critical Paper Converting Machine Co Italia SpA
Publication of EP3272512A1 publication Critical patent/EP3272512A1/de
Application granted granted Critical
Publication of EP3272512B1 publication Critical patent/EP3272512B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0753—Roller supporting, positioning, driving means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0758—Characteristics of the embossed product
    • B31F2201/0761—Multi-layered
    • B31F2201/0764—Multi-layered the layers being nested
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0771—Other aspects of the embossing operations
    • B31F2201/0776—Exchanging embossing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0782—Layout of the complete embossing machine, of the embossing line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0784—Auxiliary operations
    • B31F2201/0787—Applying adhesive

Definitions

  • the present invention relates to an improved embossing assembly for sheet material, in particular paper, such as tissue paper, toilet paper and the like.
  • Embossing machines are known on the market provided with embossing cylinders or rollers supported rotatably at their ends by means of bearings in the side panels of the frame of the embossing machine.
  • embossing rollers are provided with a sleeve, generally in steel, engraved with the embossing patterns, so as to be able to perform the embossing of the respective plies of paper. This takes place by making the paper pass through an indentation between the steel embossing roller and the rubber roller which co-operates with it (pressure roller).
  • the paper plies are subsequently coupled one to the other by means of nested or tip-to-tip coupling, so as to obtain an embossed web of several layers.
  • the embossing machines are also provided with embossing cylinders or rollers in rubber supported rotatably at their ends, which act as contrast for the embossing rollers in steel with which they co-operate.
  • the rubber roller can be different in order to adapt to the different steel rollers: it is well known in fact that a correct embossing process also depends on the features of the rubber roller, whose required hardness can vary from 50, 60 70 Shore A to 90 Shore A or more.
  • the embossing steel rollers and the rubber rollers have to be accessible and/or removable both for maintenance (for example the replacement of the bearings) and for the type of process, due to the need to change the embossing patterns on the web (sheet) and therefore the engraving on the sleeve of the embossing roller, and consequently to change also the rubber rollers.
  • Patent EP 1652661 B1 describes an embossing machine for sheet material which comprises at least two embossing rollers, the ends of which are mounted rotatably in the side panels of the frame of the embossing machine, where each of the side panels is divided into a fixed portion and into a translatable movable portion, or rotatable with respect to a fixed point, so as to free an adequate space to allow an easy replacement of the embossing rollers in steel by means of raising and lowering of the same with a hoist, after having been detached from the supports placed in the side panels.
  • EP 1652661 B1 allows an easy replacement of the embossing rollers in steel and in rubber but the limitation of this system is that it is still necessary to operate manually to engage/disengage the supports of the embossing rollers which are mounted on the fixed part of the side panel.
  • rollers cannot be shared with other similar units or moved in case of need onto other embossing machines except in a very complicated manner.
  • rollers as well as soiled, cannot be cleaned during production in that housed inside safety guards or close to moving mechanical members as occurs in the cases in WO2015/150452 and in EP 1 765 584 .
  • the object of the present invention is to eliminate the disadvantages of the prior art by providing an embossing assembly for sheet material which is apt to simplify and speed up the operations of replacement of the embossing rollers in steel and in rubber and the operations of regulation of the machine.
  • Another object of the present invention is to provide such an embossing assembly which is reliable and at the same time apt to be installed in a compact embossing machine which occupies little space, without sacrificing the possibility of storing many replacement rollers.
  • a further object of the present invention is to provide a system of replacement/storage of the rollers for said embossing assembly which allows moving in a simple manner, in case of need, the rollers of an embossing machine on other embossing machines present in the production unit, and managing the storage and maintenance of the rollers also with the machine in operation.
  • Another object of the present invention is to provide such an embossing assembly wherein the rollers can be engaged/disengaged automatically, so as to avoid manual disengaging/engaging of the block support of conventional embossing rollers.
  • the embossing machine according to the present invention provides an embossing assembly for sheet material comprising
  • Each of the side panels is divided into a fixed side panel portion and into a movable side panel portion.
  • the ends of the embossing rollers are not mounted in blocking supports attached to the fixed side panel portion because said blocking supports are not in fact provided on said fixed side panel portion: in actual fact the lower part of the block supports is attached to the fixed side panel portion while the upper part of the block supports is integral, or in one single part, with the movable side panel portion as will be explained in detail here below.
  • the rollers can therefore rotate, being restrained at their ends by the movable and fixed portions of the side panels.
  • the side panels of the movable portions contain special parts formed thereon and capable of avoiding the use of supports for the rollers since it is the same parts formed on the side panels which contain the rollers.
  • the present embossing machine provides moreover a roller exchange station which rests on the upper cover of the frame of the machine in which the roller just extracted from the embossing assembly can stay, while awaiting to be returned in the magazine by a hoist or winch mounted on a bridge crane (automatic winch) since the rollers can be extracted and positioned outside of the frame of the machine yet close thereto, avoiding the need to increase the dimensions of the machine for the storage of the rollers and the space of access to all the rollers.
  • An automatic improved winch can be used since the movable portion of the side panel allows access immediately to the rollers without having to disengage manually the upper part of the block supports of the rollers.
  • the use of the winch can therefore be completely automatic.
  • the present system allows an easy change of production between tip-to-tip production and nested production and moreover it is advantageous also in the case wherein the marrying roller mounted in the movable roller has to be replaced.
  • Figure 1 illustrates a first embodiment of an embossing machine, denoted overall by reference numeral 1.
  • the embossing machine 1 comprises two side panels or shoulders, each of which comprises at least one fixed portion 2, 2', placed in a fixed manner on a base 3.
  • Two embossing cylinders or rollers 4A, 4B are mounted rotatably in the fixed portions 2, 2' of the side panels.
  • Each embossing roller 4A, 4B comprises a sleeve in engraved steel 5A, 5B and two end portions 6A, 6B.
  • the ends 6A, 6B of the embossing rollers are rotating between the fixed portions (2, 2') of the side panels and the movable portions 23 of the side panels.
  • the embossing machine 1 works two plies W1, W2 of material (for example paper) and provides for performing the embossing of each of the two plies between a pair of rollers coupled one to the other, comprising an engraved steel roller and a contrast (counter-pressure) rubber-covered roller.
  • the upper ply W1 passes through the upper pair of rollers constituted by a first embossing roller 4A and by a rubber-covered roller 8A.
  • the two rollers 4A, 8A are brought into contact with a working pressure.
  • the upper ply W1 passes through the two rollers 4A, 8A so as to be marked with the engraving of the steel roller 4A.
  • the upper ply W1 On leaving the point of contact between the two rollers 4A and 8A, the upper ply W1 remains in contact with the steel roller 4A for an angle of approximately 270°. In this way the upper ply W1 can come into contact with a glue distribution assembly 9 which, by means of a distributing roller 10, deposits a layer of glue on the ply W1. It should be noted that the distributing roller 10 and the upper embossing roller 4A are not in contact, but are adjusted so that the glue comes into contact only with the paper ply W1.
  • the glue distribution assembly 9 functions as follows.
  • the glue is contained in a tank 11.
  • a first roller 12 rotates partially immersed in the tank 11 and distributes the glue which is deposited on its surface on the glue dispenser roller 10.
  • the glue dispenser roller 10 thanks to its particular surface finish, takes a uniform quantity of glue on its surface and distributes a uniform layer of glue on the paper ply W1.
  • the lower ply of paper W2 passes through the lower pair of rollers constituted by the second embossing roller 4B in steel and by a rubber-covered roller 8B so as to be marked with the engraving of the steel roller 4B.
  • the ply W2 remains wound on the steel roller 4B for an angle greater than 90°. Then the lower ply W2 detaches from the steel roller 4B to couple with the upper ply W1. In this coupling the surface of the lower ply W2 comes into contact with the glued surface of the upper ply W1.
  • the two embossing rollers 4A and 4B are near to but are not in contact one with the other.
  • the embossing rollers 4A and 4B have to be placed at a centre distance defined to facilitate the system of phasing of the rollers, that is to ensure that the engravings of the two plies W1, W2 are superimposed one in relation to the other during the coupling, in the case of nested coupling.
  • a coupling roller 13 is placed, commonly known as marrying roller, mounted on arms hinged to the side panels of the machine.
  • marrying roller 13 comes into contact with the upper embossing roller 4A and presses the two plies W1, W2 together so as to make the gluing take place and to obtain in output an embossed two-ply web W.
  • the embossed two-ply web W is guided outside of the embossing machine 1 by means of idle rollers 15 suitable disposed in order to regulate the pull thereof.
  • this embossing machine 1 is very compact and that, without the present invention, the access to the steel rollers 4A and 4B would be difficult because the access to the rollers is prevented by the gluing assembly 9 and by the upper rubber-covered roller 8A on one side and by the marrying roller and by the lower rubber-covered roller 8B on the other side. Moreover, for the operating reasons described above, the embossing rollers 4A and 4B have to be placed close one to the other and at a well-defined centre distance in order to regulate their phasing and the breadth of the gap 14 for the passage of the plies W1, W2.
  • this embossing machine when it is in function in the mode without glue, can optionally have the side panel opened.
  • embossing machine 1 can be immediately accessible by an automatic hook or crane without any further operation with the exception of the opening of the movable side panel portion also in the case of non-glued products.
  • a lower oblique support 30 is placed whereon two housings 40 are formed, upwardly open, for housing the embossing rollers.
  • a movable portion 23 of the side panel is placed along a vertical plane coinciding with the plane of the fixed portion 2, 2' of the side panel.
  • the movable portion 23 of the side panel has, at the position of the embossing rollers, a lower edge with a profile ( Figures 6 , 8 ) matching the profile of the upper portion of the two embossing steel rollers 4A and 4B.
  • said lower edge of the movable portion 23 has a plate 24 ( Fig. 4 ) whereon two bushings 31A and 31B are attached, after careful adjustment ( Figs. 3-4 ) with a semicircle shape forming an upper part 31 of the block supports of the rollers.
  • the ends 6A, 6B of the rollers 4A, 4B are rotatable and contained between the lower part 30 on the fixed side panel and said upper part 31 integral with said movable side panel 23, so as not to require supports for the embossing rollers.
  • Each bushing 31A, 31B and each of said housings 40 on said lower oblique support is shaped so as to define a seat with concave arch with an arc angle of 180°.
  • the movable portion 23 of the side panel is apt to translate on the guide track 21 ( Figs. 1-2 , 6 ): in this way it can move from a position of closure wherein the two bushings 31A and 31B of the plate 24 attached to the lower edge of the movable portion 23 are located above the ends of the embossing rollers, pressing on them, to a position of opening (illustrated in Figure 6 ) wherein an open space is left above the ends of the embossing cylinders.
  • the movable portion 23 of the side panel has to be closed or opened effectively if the marrying roller 13 has to be used.
  • this portion of the movable side panel 23 can be left open.
  • the two movable side panels 23 placed on the fixed portions 2, 2' of the side panels can be moved manually or in an automated manner by means of actuators or a motorised system. Clearly a movement of the two movable portions of the side panels is synchronised.
  • Blocking systems are provided for blocking the movable portions 23 of the side panels in the positions of closure and of opening.
  • the slides 22 of the movable portions 23 of the side panels are connected to the guide tracks 21 of the bracket 20 by means of precise position references (for example pins) so as to ensure that the relative positions of the marrying roller 13 with respect to the first embossing roller 4A are observed.
  • each side panel can be provided with a plurality of movable portions of the side panel sliding on the fixed portions of the side panel or a plurality of movable portions sliding reciprocally one in relation to the other.
  • the movable portions 23 of the side panels are moved, for example they are made to translate on the guides 21 of the fixed portions 2, 2' of the side panels (or made to rotate with respect to a pin placed on the lower part of the machine as in Fig. 5 ) to bring them into the position of opening, so as to leave an empty space above the embossing rollers 4A, 4B.
  • the first embossing roller 4A is grasped with a hoist or winch with bridge crane provided with appropriate gripping means 55 and raised.
  • the second embossing roller 4B can be removed both after having removed the first embossing roller in steel 4A and also before removing said first embossing roller 4A, thanks to the fact that the two bushings 31A, 31B placed above the embossing cylinders move away from them on moving away from the movable side panel 23, without having to operate any manual disengaging.
  • the present embossing machine 1 according to the present invention is extremely advantageous when the whole line of loading/unloading of the steel rollers and of the rubber-covered ones is automated and associated with further components as will be described here below with reference to Figures 7-11 .
  • the present machine 1 provides, moreover, a housing 60 for housing at least one roller, with the function of exchange station.
  • Said exchange station 60 is placed above the covers of the frame at the fixed side panel portion 2, 2' ( Fig. 7 ).
  • roller 4A or 4B newly extracted from the embossing assembly can stay while waiting to be returned, preferably using an automatic bridge crane 61, into a roller magazine 80 provided in proximity of the embossing machine 1 or distanced form said machine 1.
  • the magazine 80 can be a shuttle with casing (magazine on fixed or movable shuttle) containing one or two rollers, as illustrated in Figs. 7-10 , or can be a vertical magazine for housing a greater number of rollers as illustrated in Fig. 11 , or it can be a combination of shuttle and vertical magazine without thereby departing from the spirit of the present invention.
  • the abovementioned shuttle when it is movable can be provided with a slide on wheels so as to be able to perform a translation of the rollers in order to move them easily between one production line and the other one present inside the same production unit, allowing sharing of said rollers between similar units, thus reducing the total cost of the rollers and the number of the rollers stored of the production unit.
  • a further advantage of a shuttle 80 with movable slide is of allowing the rollers to be stored outside of the work zone of the machine, preventing them from being soiled as instead happens in known machines in which the rollers are stored in proximity of the work zone inside the safety guards: with the shuttle 80 movable it is instead possible to bring the rollers in proximity of the embossing machine only when necessary, ready for subsequent changes.
  • Yet another advantage of providing a shuttle 80 which is movable is being able to take the rollers from the storage zone, also when the machine is in production, which is not possible in known machines which provide the storage of the rollers inside the same machine or inside the safety guards.
  • the use of the bridge crane 61, movable on tracks appropriately formed on a beams structure 70 placed around the embossing machine 1 of the present invention means that an easy and fast replacement of the embossing rollers is possible, both those in steel and those in rubber, without any type of limitation, moving them from the machine to the various rollers magazines 80 provided in the system.
  • rollers of the present system takes place advantageously without the intervention of the operator with the exception of removal and restoring of the phasing belt where this is necessary, considerably reducing the times of rollers change.
  • the present system allows an easy change between tip-to-tip production and nested production and moreover it is advantageous also in the case wherein the marrying roller mounted in the movable frame has to be replaced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
EP17181678.8A 2016-07-21 2017-07-17 Verbesserte prägeanordnung für folienmaterial und entsprechendes automatisches prägewalzenwechselsystem Active EP3272512B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000076829A IT201600076829A1 (it) 2016-07-21 2016-07-21 Gruppo goffratore migliorato per materiale in foglio e relativo sistema automatico di cambio rulli goffratori

Publications (2)

Publication Number Publication Date
EP3272512A1 true EP3272512A1 (de) 2018-01-24
EP3272512B1 EP3272512B1 (de) 2018-07-11

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EP17181678.8A Active EP3272512B1 (de) 2016-07-21 2017-07-17 Verbesserte prägeanordnung für folienmaterial und entsprechendes automatisches prägewalzenwechselsystem

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EP (1) EP3272512B1 (de)
IT (1) IT201600076829A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109968887A (zh) * 2019-04-23 2019-07-05 佛山市高明区捷丰裕金属制品有限公司 一种新型板材压纹机
US10773483B2 (en) * 2016-03-25 2020-09-15 Fabio Perini S.P.A. Magazine for embossing rollers and embossing device comprising the magazine
EP3747644A1 (de) 2019-06-05 2020-12-09 GAMBINI S.p.A. Präge- und laminieranordnung und entsprechendes präge- und laminierverfahren
EP3500426B1 (de) * 2016-08-22 2021-12-08 Maxima S.R.L. Prägevorrichtung mit prägewalzenaufbewahrungseinheit
CN117103903A (zh) * 2023-10-23 2023-11-24 常州市平晖机械制造有限公司 一种可快速更换压花辊的压花机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4632655A (en) * 1984-06-14 1986-12-30 Hermann Berstorff Maschinenbau Gmbh Embossing calender for thermoplastics films
EP1652661A2 (de) * 2004-10-26 2006-05-03 Paper Converting Machine Company Prägevorrichtung für Folienmaterial
EP1765584A1 (de) * 2004-06-18 2007-03-28 Futura S.p.A Stützvorrichtung für prägewalzen und verfahren zu deren austausch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4632655A (en) * 1984-06-14 1986-12-30 Hermann Berstorff Maschinenbau Gmbh Embossing calender for thermoplastics films
EP1765584A1 (de) * 2004-06-18 2007-03-28 Futura S.p.A Stützvorrichtung für prägewalzen und verfahren zu deren austausch
EP1652661A2 (de) * 2004-10-26 2006-05-03 Paper Converting Machine Company Prägevorrichtung für Folienmaterial

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10773483B2 (en) * 2016-03-25 2020-09-15 Fabio Perini S.P.A. Magazine for embossing rollers and embossing device comprising the magazine
EP3500426B1 (de) * 2016-08-22 2021-12-08 Maxima S.R.L. Prägevorrichtung mit prägewalzenaufbewahrungseinheit
US11479010B2 (en) 2016-08-22 2022-10-25 Maxima S.R.L. Embossing device with embossing roller storage unit
CN109968887A (zh) * 2019-04-23 2019-07-05 佛山市高明区捷丰裕金属制品有限公司 一种新型板材压纹机
CN109968887B (zh) * 2019-04-23 2024-05-24 佛山市高明区捷丰裕金属制品有限公司 一种新型板材压纹机
EP3747644A1 (de) 2019-06-05 2020-12-09 GAMBINI S.p.A. Präge- und laminieranordnung und entsprechendes präge- und laminierverfahren
US11654650B2 (en) 2019-06-05 2023-05-23 GAMBINI S.p.A. Embossing and lamination assembly and relative embossing and lamination method
CN117103903A (zh) * 2023-10-23 2023-11-24 常州市平晖机械制造有限公司 一种可快速更换压花辊的压花机
CN117103903B (zh) * 2023-10-23 2024-01-19 常州市平晖机械制造有限公司 一种可快速更换压花辊的压花机

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EP3272512B1 (de) 2018-07-11
IT201600076829A1 (it) 2018-01-21

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