EP3275641B1 - Apparatus and method for unwinding a band and applying glue thereto - Google Patents

Apparatus and method for unwinding a band and applying glue thereto Download PDF

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Publication number
EP3275641B1
EP3275641B1 EP17182922.9A EP17182922A EP3275641B1 EP 3275641 B1 EP3275641 B1 EP 3275641B1 EP 17182922 A EP17182922 A EP 17182922A EP 3275641 B1 EP3275641 B1 EP 3275641B1
Authority
EP
European Patent Office
Prior art keywords
band
emitter
glue
previous
unwinding apparatus
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
EP17182922.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3275641A1 (en
Inventor
Gianni Gambini
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.)
Gambini SpA
Original Assignee
Gambini 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 Gambini SpA filed Critical Gambini SpA
Priority to RS20191532A priority Critical patent/RS59755B1/sr
Publication of EP3275641A1 publication Critical patent/EP3275641A1/en
Application granted granted Critical
Publication of EP3275641B1 publication Critical patent/EP3275641B1/en
Active legal-status Critical Current
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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
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/28—Attaching the leading end of the web to the replacement web-roll core or spindle
    • B65H19/286—Attaching the leading end of the web to the replacement web-roll core or spindle by applying adhesive to the web
    • 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
    • B31C—MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C1/00—Making tubes or pipes by feeding at right angles to the winding mandrel centre line
    • B31C1/08—Accessories of machines therefor not otherwise provided for
    • 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
    • B31C—MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C3/00—Making tubes or pipes by feeding obliquely to the winding mandrel centre 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
    • B31B50/626—Arrangements for permitting the glue to set

Definitions

  • the present invention refers to an apparatus and to a method for applying glue to a band.
  • the present invention concerns an unwinding apparatus of a "coremaker”.
  • the unwinding apparatus is a machine adapted for unwinding a band, typically made of card wound in reels, and adapted for applying an adhesive material, typically a vinyl glue, on said band.
  • the band thus prepared is then sent to a winding group adapted for carrying out the spiral-winding of said support around a core, or pin, for producing tubular elements intended to be used as internal support, or core, in rolls of toilet paper, rolls of all-purpose absorbent paper, rolls of adhesive tape or other.
  • the so-called “coremaker” apparatus therefore comprises at least one unwinding apparatus and at least one winding group.
  • Unwinding apparatuses for coremakers comprising a glue dispenser with extruder, in order to deposit adhesive material on the substrate that is fed to the winding group.
  • the glue preferably has a temperature around 25°C, in any case comprised between 20°C and 40°C.
  • the temperature of the glue is important for the productivity of the machine particularly when it is considered that the support, which as stated in general consists of a band or strip of card, is processed by the unwinding group at a linear speed that can reach 400 metres/minute.
  • the support material typically as stated consisting of a strip of card, is required by the market to be increasingly thin, not only to keep down the costs of the material per se, but also to keep down the costs of the subsequent disposal of t he product and the waste.
  • Vinyl glue indeed consists of long and flexible molecules of a polymer, polyvinyl acetate, in aqueous suspension.
  • Borax binds together the polymeric chains thickening the glue.
  • a vinyl glue without the borax-based reagent is therefore more fluid, which accentuates the need for quick drying.
  • US 4 642 252 A teaches to unwound a sheet from a roll, to apply adhesive to one surface of the sheet by an applicator, to convey the sheet to a hot air drier and to bond it to a laminated film by means of contact bonding rolls before winding 5 it about a mandrel for the production of vessels.
  • the purpose of the present invention is to avoid the drawbacks of the known solutions by providing an unwinder for coremaker machines, adapted for carrying out the production of a tubular element by winding a strip of card in a spiral and subsequently cutting the single elements, which makes it possible to eliminate or at least reduce the drawbacks linked to the dispensing temperature and to the drying speed of the glue that is deposited on the card.
  • a further purpose of the present invention is to make an unwinding apparatus that makes it possible to optimise the deposition and drying steps of the glue in relation to high advancing speeds of the band of card, to reduced thicknesses and in the case of vinyl glues without additives, e.g. without borax.
  • an unwinder for producing a tubular element by winding at least one strip of card in a spiral according to claim 1.
  • the unwinding apparatus achieves the aforementioned purposes by arranging a heating element downstream of the glue dispenser configured to deposit said glue on at least one portion of the band processed by the unwinder, said heating element being adapted for heating the portion of said band on which said glue has been deposited and comprising at least one emitter of air at controlled temperature movable between a first operative position, in which said air flow hits at least one portion of said band and a second rest position, in which said air flow is deviated with respect to said band, not hitting it.
  • Said heating element preferably comprises at least one fan adapted for generating an air flow and heating means, for example consisting of an electrical resistance, adapted for heating said air flow generated by said fan.
  • an unwinding apparatus 10 comprises a main structure comprising a plurality of devices, of the known type, which unwind a reel of band 100 of card that is fed to the spindle of the subsequent winding module, not represented in figure 1 .
  • the band 100 of card, or of another equivalent material, is conveyed by means of a plurality of pulleys 11 towards a glue dispenser 20 equipped with extruder 21.
  • the dispenser also of the known type, ensures that the glue is deposited on the band 100 in the desired amount and way.
  • typical advancing speed of the band 100 in the unwinding apparatus 10 are about 250-350 metres per minute, up to speeds of 400 metres per minute.
  • the unwinding apparatus 10 further comprises a heating element 30 adapted for heating the portion of said band 100 on which the glue has been deposited.
  • the heating element 30 preferably comprises, in accordance with a preferred embodiment of the present invention, at least one emitter 31 of air having a controlled temperature.
  • the heating element 30 preferably comprises at least one impeller adapted for generating an air flow through said emitter 31 , and heating means, for example consisting of an electrical resistance, adapted for heating said air flow generated by said impeller. Impeller and heating means are not indicated in the attached figures.
  • They can advantageously be housed inside the main body 32 of the emitter 31 or on-board the main structure of the unwinding apparatus 10.
  • said heating element 30 comprises a substantially box-shaped containment structure 33 in which said emitter 31 is at least partially housed.
  • At least the end portion, i.e. the diffuser 31a , of said emitter 31 from which the air flow comes out is preferably housed in said containment structure 33.
  • said containment structure 33 comprises at least one inlet opening 30a and at least one outlet opening 30b for said band 100 , which can thus cross said heating element 30.
  • Said inlet and outlet openings 30a , 30b are advantageously slit-shaped, so that the air generated by the diffuser does not come out from said openings.
  • said inlet opening 30a and said outlet opening 30b are aligned along the direction identified by the advancing direction of the band 100 , and an abutment sheet 36 is further provided inside said containment structure 33 , also arranged according to the direction identified by said band 100.
  • Said abutment sheet 36 is positioned on the opposite side of said band 100 with respect to said diffuser 31a of said emitter 31.
  • said abutment sheet 36 is positioned inside said containment structure 33 so that the outer face 102 of said band 100 touches it.
  • said sheet is positioned with respect to said band or is sized with respect to said band so that at least one portion of the outer face 102 of said band 100 projects laterally from said sheet 36 , so as not to be in contact with it.
  • the width of the portion of said band that projects from said sheet corresponds to the width of the strip of band on which the glue has been deposited by the dispenser 22.
  • the heating element 30 is configured so as to foresee that the strip of band 100 engaged by the glue is free with respect to any type of abutment, whereas the part of band not engaged by the glue rests, with its outer face 102 , against said support sheet 36 which has the function of preventing the band itself from moving through the action exerted by the air flow coming from the emitter 31 , modifying the distance of the band 100 from the diffuser 31a of the emitter 31 , a distance that influences the heating of the band itself.
  • said emitter 31 is movable between a first operative position, shown in figure 2A , in which said emitter 31 is oriented so that the air flow hits at least one portion, the one hit by the glue, of said band, and a second rest position, shown in figure 2B , in which said air flow is deviated with respect to said band, so as not to hit it.
  • the emitter 31 for this purpose is movable between the first operative position in which the diffuser 31a at its end is close to the band 100 , about 1 centimetre away from the lower surface 101 of the band and so that the air flow is substantially perpendicular to the lower surface 101 of the band, and the second position in which said diffuser 31a of said emitter 31 is moved with respect to the band 100 , so that the air flow generated by the emitter 31 does not hit the band 100.
  • said diffuser 31a is configured like a blade, or like a slit, in order to convey the air flow with greater precision onto the desired portion of band.
  • said diffuser 31a is advantageously removable, so that diffusers 31a with different shapes or characteristics can be mounted on the emitter 31.
  • said containment structure 33 shaped substantially like a box, comprises an inner wall 33a and an outer wall 33b , a gap 34 being formed between the two walls.
  • said inner wall 33a is associated with deflector elements 35 adapted for channelling the air flow coming from the emitter 31 when the latter is positioned in the second rest position of figure 2B . Thanks to this configuration of the containment structure, and in particular to the presence of the deflectors 35 , it is possible to move the emitter 31 in the second rest position conveying the air outwards, in particular the air can freely come out from the lower area of said containment structure 33.
  • the emitter 31 is rotatably associated with a support element 37 , so that it is movable between said first and said second position rotating around a hinging point.
  • the movement of the emitter is obtained through pneumatic actuation means.
  • the heating element 30 of the winding apparatus 10 according to the present invention is suitable for generating a hot air flow at high temperatures, of about 400°C-600°C.
  • the heating means are suitably sized and thus so is the fan.
  • the possibility of moving the emitter 31 of said heating element 30 between a first operative position and a second rest position in which the air does not hit the band 100 has the purpose of preventing damage to the band 100 in the case of the unwinder stopping. Indeed, in the case in which it is necessary to stop the advancing of the band 100 it is necessary, to avoid burning the band itself, to immediately interrupt the outflow of hot air. However, even by interrupting the supply to the resistance, the cooling transient of the heating means would not ensure an immediate decrease in temperature of the air flow, and therefore the band would continue to be hit by hot air risking burning.
  • the system for moving the emitter 31 which has been described, has therefore been devised and provided. Thanks to the possibility of moving the emitter taking the air flow away from the band 100 , there is an immediate interruption of the flow that hits the band, with it being possible at a subsequent time to turn off the heating means and then, when they are cooled down sufficiently, also turn off the fan.
  • the containment structure 33 of the heating element 30 has also been devised and made to ensure optimal safety conditions for users who work near to the machine.
  • the external temperature of the containment structure 33 must be below 50°C, since the worker must not risk getting burnt in the case in which accidental contact is made, for example by resting a hand on it, with the outer surface of the heater 30.
  • the containment structure 33 advantageously comprises an inner wall 33a and an outer wall 33b , a first gap 34 being provided between the two walls.
  • a layer of insulating material 38 for example consisting of glass-ceramic, over which a layer of polycarbonate 39a , for example Lexan, and preferably a second layer of polycarbonate 39b separated by a second gap 39c from said first layer of polycarbonate 39a , is juxtaposed.
  • said containment structure 33 it is possible to provide a fan 50 or analogous cooling means suitable for creating a cool air flow in the gaps of the structure itself.
  • an opening 40 for the insertion of the band 100 inside the containment structure 33 is provided on said containment structure 33.
  • Another object of the present invention is a method for applying glue to a band 100 processed by an unwinding apparatus 10 according to what has been described up to here, which comprises the steps of:
  • said hot air flow has an average temperature of about 400°-600° C.
  • the coremaker machine thus conceived can undergo numerous modifications and variants, all of which are covered by the invention; moreover, all of the details can be replaced by technically equivalent elements.
  • the materials used, as well as the sizes, can be whatever according to the technical requirements.

Landscapes

  • Making Paper Articles (AREA)
  • Coating Apparatus (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP17182922.9A 2016-07-25 2017-07-25 Apparatus and method for unwinding a band and applying glue thereto Active EP3275641B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RS20191532A RS59755B1 (sr) 2016-07-25 2017-07-25 Aparat i metoda za odmotavanje trake i nanošenje lepka na istu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000077839A IT201600077839A1 (it) 2016-07-25 2016-07-25 Apparato e metodo per l’applicazione di colla ad un nastro e tubiera comprendente detto apparato.

Publications (2)

Publication Number Publication Date
EP3275641A1 EP3275641A1 (en) 2018-01-31
EP3275641B1 true EP3275641B1 (en) 2019-09-04

Family

ID=57610148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17182922.9A Active EP3275641B1 (en) 2016-07-25 2017-07-25 Apparatus and method for unwinding a band and applying glue thereto

Country Status (4)

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EP (1) EP3275641B1 (sr)
ES (1) ES2760452T3 (sr)
IT (1) IT201600077839A1 (sr)
RS (1) RS59755B1 (sr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113547795B (zh) * 2021-07-26 2023-01-24 黄石恒盛科技发展有限公司 一种带有防护装置安全性能高的卷管机

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA848404A (en) * 1969-06-19 1970-08-04 Di Ianni Daniel Method and apparatus for making tubes
JPS60251030A (ja) * 1984-05-29 1985-12-11 味の素株式会社 耐内圧性容器用胴部材

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
RS59755B1 (sr) 2020-02-28
EP3275641A1 (en) 2018-01-31
ES2760452T3 (es) 2020-05-14
IT201600077839A1 (it) 2018-01-25

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