EP2792475B1 - Machine for producing a tubular element by winding in a spiral at least one strip of cardboard - Google Patents

Machine for producing a tubular element by winding in a spiral at least one strip of cardboard Download PDF

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Publication number
EP2792475B1
EP2792475B1 EP14165295.8A EP14165295A EP2792475B1 EP 2792475 B1 EP2792475 B1 EP 2792475B1 EP 14165295 A EP14165295 A EP 14165295A EP 2792475 B1 EP2792475 B1 EP 2792475B1
Authority
EP
European Patent Office
Prior art keywords
winding
cardboard
strip
belt
pin
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
EP14165295.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2792475A1 (en
Inventor
Giovanni 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 International SA
Original Assignee
Gambini International SA
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 International SA filed Critical Gambini International SA
Priority to RS20170120A priority Critical patent/RS55659B1/sr
Publication of EP2792475A1 publication Critical patent/EP2792475A1/en
Application granted granted Critical
Publication of EP2792475B1 publication Critical patent/EP2792475B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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

Definitions

  • the present invention refers to a machine for producing a tubular element by winding in a spiral at least one strip of cardboard.
  • the present invention refers to a method for obtaining the aforementioned cardboard tube.
  • the present invention refers to the production of tubular elements intended to be cut to size to be used as an inner support, or core, in toilet paper rolls, kitchen paper rolls, adhesive tape rolls or other products.
  • corewinder comprising a unit for winding one or more strips of cardboard about a pin element.
  • the winding unit is commonly formed by a belt returned by two pulleys which have a rotational axis incident with the axis of the pin according to an angle preferably different from the right angle. At least one branch of the belt is loop-wound about the pin to tighten on the latter at least part of a superimposed portion of the at least one strip of cardboard being wound.
  • the belt forms around the at least one strip being wound on the pin substantially a "knot" which slides with respect to the tube being formed advancing on the pin.
  • the knot of the belt acts on a superimposed portion of two successive turns of the common strip.
  • the knot of the belt acts on a superimposed portion of the two belts.
  • glue is provided arranged at the superimposed portions of the at least one strip.
  • an excessive tension on the tube being wound may result in too much friction on the pin while insufficient tension may cause the incomplete gluing and a gluing such to cause in the cutting step the detachment of the tip ends not properly glued.
  • Improper gluing prevents a correct supply of the tube portions, or cores, to other machines, for example a reeling machine.
  • the hot glue is very expensive even due to the fact that it cannot be recycled.
  • the devices adapted to impart a further pressure to the currently known tubes provide for the use of wheels, smooth or knurled, acting under pressure directly at contact with the tube being made downstream of the knot of the belt.
  • Such wheels have the problem related to the wear of the spindle, due to extremely localised pressure, and problems generated by the interference of the pressure wheel with the tube being made.
  • US2931278 discloses a machine and a method for producing a tubular element respectively according the preamble of claims 1 and 5.
  • the object of the present invention is to provide a machine for producing a tubular element for winding in a spiral at least one strip of cardboard that is alternative to the current known ones.
  • Another object of the present invention is to provide a corewinder particularly adapted to provide tubes made by winding a single strip.
  • the invention attains the objects outlined above by providing pressing means acting on the knot of the belt, and not on the tube, so as to variably compress the belt against the strip being wound on the pin.
  • a preferred embodiment provides the presence of an idle roller which is moveable between a contact position tangential to the belt and a spaced apart position.
  • the contact pressure may be modulated so as to impart various pressures on the belt depending on the needs.
  • a machine for producing cardboard tubes comprising a winding unit 12 and a winding pin 13.
  • a strip of cardboard 11 is supplied carrying glue to the machine 10 continuously according to the known methods.
  • the machine 10 receives the strip of cardboard 11 at the winding unit 12 aimed at providing a tube 11 around a per se known pin element 13.
  • the winding pin 13 is mounted cantilevered on a head 15 of the machine 10 for example with horizontal axis. It may be fixed or idle so as to be able to rotate during the production of the cardboard tube 11.
  • the winding unit 12 comprises a winding belt 16 returned by two pulleys 17, at least one of which 18 is preferably motorised.
  • the line that joins the centres of the two pulleys 17 forms an incidence angle with respect to the pin 13 different from the right angle and it may be modified at will, for example by acting on a flywheel 21.
  • the winding belt 16 is wound loop-like around the pin 13, to compress the strip of cardboard 11 being wound partially superimposed in a spiral on the pin 13.
  • the winding belt 16 substantially forms a "knot” which slides with respect to the tube 11 being formed which advances on the pin 13.
  • the tension of the winding belt 16 may be regulated by, for example, a relative movement of a pulley 17 on the plate 20.
  • At least one pressing unit 30 is provided acting on the belt 16 configured for variably compressing it against the strip 11 being wound on the pin 13 as desired.
  • the pressing unit 30 acts on the strip 11 being wound on the pin indirectly and through the belt 16.
  • the pressing unit 30, which may act on the belt 16 both on the side of the plate 20 and on the opposite side of the pin 13, comprises a roller element 31 idly mounted on a linkage 32 actuated by a pneumatic cylinder 33.
  • the linkage 32 which is moveable under the action of the pneumatic cylinder 33 between a position in which the roller element 31, presses against the belt 16 and a position in which it is distant from the same.
  • the roller 31 may act under pressure against the belt 16 according to compression values that are variable and controllable by the pneumatic cylinder 33.
  • Such pneumatic cylinder 33 is controlled by a control unit (not shown).
  • the linkage 32 is hinged on a bracket 34 fixed to the plate 12, which bracket supports an end of the pneumatic cylinder 33.
  • the axis 35 of the roller 31 may be parallel to the axis of the pin 13, or inclined or adjustable in inclination as illustrated with F in figure 4 .
  • the method for producing cardboard tubes by means of the machine 10 according to the invention provides for the known steps of:
  • the machine 10 performs the step of compressing the strip of cardboard 11 against the pin 13 acting under pressure against the belt 16 at the knot thereof around the at least one strip being wound on the pin 13.
  • the machine described up to date refers to a machine of the type supplied by only one strip 11.
  • the present invention which identifies its inventive concept with the particular pressing unit 30 acting on the belt 16 and not on the tube 13, can also be applied to machines supplied by two or more strips.
  • the strips of cardboard shall be simply wound on the pin in a spiral staggered with respect to each other, i.e. parallel and partially superimposed. These strips of cardboard shall be glued to each other at the superimposed edges thereof.
  • the single strip 11 embodiment is supplied so that the portion of the turn being wound is at least partially superimposed to the same strip 11 previously wound on the pin 13.
  • the machine for producing cardboard tubes subject of the present invention and the relative method have the advantage of improving the gluing thus preventing the formation of unglued tips in the step of cutting the cardboard tube and making the gluing independent from the angle of the propeller making the tube.

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  • Making Paper Articles (AREA)
EP14165295.8A 2013-04-19 2014-04-18 Machine for producing a tubular element by winding in a spiral at least one strip of cardboard Active EP2792475B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RS20170120A RS55659B1 (sr) 2013-04-19 2014-04-18 Uređaj za proizvodnju cevastog elementa namotavanjem u spiralu najmanje jedne kartonske trake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000644A ITMI20130644A1 (it) 2013-04-19 2013-04-19 Macchina per la produzione di un elemento tubolare per avvolgimento a spirale di almeno una striscia di cartone

Publications (2)

Publication Number Publication Date
EP2792475A1 EP2792475A1 (en) 2014-10-22
EP2792475B1 true EP2792475B1 (en) 2016-11-16

Family

ID=48670684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14165295.8A Active EP2792475B1 (en) 2013-04-19 2014-04-18 Machine for producing a tubular element by winding in a spiral at least one strip of cardboard

Country Status (4)

Country Link
EP (1) EP2792475B1 (es)
ES (1) ES2615113T3 (es)
IT (1) ITMI20130644A1 (es)
RS (1) RS55659B1 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016067314A1 (en) * 2014-10-29 2016-05-06 Futura S.P.A. Machine for the production of cardboard tubes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2931278A (en) * 1957-07-12 1960-04-05 Rolf L Ignell Method and apparatus for the continuous production of drinking straws and the like

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
ES2615113T3 (es) 2017-06-05
RS55659B1 (sr) 2017-06-30
ITMI20130644A1 (it) 2014-10-20
EP2792475A1 (en) 2014-10-22

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