EP4056483A1 - Film pre-stretching and brake device for reel carriage on a wrapping machine - Google Patents

Film pre-stretching and brake device for reel carriage on a wrapping machine Download PDF

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Publication number
EP4056483A1
EP4056483A1 EP22161434.0A EP22161434A EP4056483A1 EP 4056483 A1 EP4056483 A1 EP 4056483A1 EP 22161434 A EP22161434 A EP 22161434A EP 4056483 A1 EP4056483 A1 EP 4056483A1
Authority
EP
European Patent Office
Prior art keywords
roller
stretching
pinion
film
rollers
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.)
Pending
Application number
EP22161434.0A
Other languages
German (de)
English (en)
French (fr)
Inventor
Valentín Rubio Casalta
Roberto Bereber Goiricelaya
Luis Miguel López Carrillo
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.)
Aranguren Comercial del Embalaje SL
Original Assignee
Aranguren Comercial del Embalaje SL
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 Aranguren Comercial del Embalaje SL filed Critical Aranguren Comercial del Embalaje SL
Publication of EP4056483A1 publication Critical patent/EP4056483A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/02—Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders
    • B65B11/025—Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders by webs revolving around stationary articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/04—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated
    • B65B11/045—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated by rotating platforms supporting the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B2011/002—Prestretching mechanism in wrapping machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B2210/00—Specific aspects of the packaging machine
    • B65B2210/14—Details of wrapping machines with web dispensers for application of a continuous web in layers onto the articles

Definitions

  • the invention as its name indicates, relates to a device for supplying and tensioning the packaging film of a wrapping machine with a reel carriage comprising a set of rollers engaged to each other by a gearing associated to a motor where the gearing comprises pinions with different rotation speed and a connection/disconnection element that allows to link one of the pinions with the rotating shaft of one of the rollers, transferring in this way the rotation speed difference of the pinions to the rollers, which causes the stretching of the film running on the rollers and, conversely, allows to uncouple that pinion from that rotating shaft of the roller by not transferring the rotation speed of the pinions to the roller, in such a way that it does not generate stretching of the film.
  • wrapping machines In the process of wrapping palletized loads, wrapping machines generally incorporate a reel carriage that, moving around the load to be wrapped, has a system for tensioning and supplying the packaging material.
  • Film tension can be produced by the difference in speed between the orbital displacement of the carriage around the load and the film dosing speed from the reel carriage, or due the film pre-stretching during its passage through the reel carriage. A combination of both can also occur depending on the requirements.
  • Patent ES2000870 relates to a process for stretching a packaging band in a wrapper, combining a helical movement around the goods with a vertical displacement.
  • Patent ES2082902 relates to a method and apparatus for stretching packaging material in the transverse direction when supplying and wrapping the packaging material over a load to be wrapped.
  • Patent ES0268272 relates to a device for supplying stretching plastic sheeting for wrapping loaded pallets, which has two parallel vertical rollers of crazy rotation, one of larger diameter in relation to the other and with elements inside controlled from the upper part of the device.
  • rollers of these devices have the essential functions necessary to allow the film to zigzag through them towards the load to be wrapped
  • the arrangement of a reel trolley has typically at least two separate rollers in close proximity that have the function of separating and stretching a connected packaging material in the direction of the supply, producing tension and spreading of the material. The required tension varies depending on the load to be wrapped.
  • Patent ES2341209 owned by the applicant itself, relates to a reel carriage located on the vertical branch of the rotating arm and with a vertical displacement on it, surrounding the load to be wrapped and wrapping it. It also uses a motor that calibrates the necessary tension according to the load to be wrapped.
  • the relevance of the motor lies mainly in the adjustment of the necessary tension according to various characteristics of the load to be wrapped, in addition to the practicality of disassembling and changing parts.
  • film rolls are used where the film material is not pre-stretched at the factory, so that the roll carriages carry out the pre-stretching through the rollers, driven by the continuous drive motor.
  • the invention consists of a film stretching device comprising a gear comprising a set of pinions, a motor associated with that gear through a transmission, a set of rollers, and their corresponding turning shafts associated with the pinions.
  • the diameter of the pinions is different, generating a different rotational speed between them and, when all the pinions are linked to the rollers, a relative speed differential between the rollers.
  • the device comprises at least two rollers, each associated with a pinion.
  • the motor transmits motion to the pinions through a pinion that we will call the motor pinion.
  • a motor pinion and two roller pinions we find a motor pinion and two roller pinions.
  • Each roller pinion is linked to a roller - directly or through its rotating shaft - thus conditioning its speed of rotation, although one of the roller pinions can be disconnected from the rotating shaft of its roller and no longer transfer its movement to it.
  • the main pinion that can be linked or unlinked to the rotating shaft of its roller.
  • the device will have a pre-stretch film position when all the roller pinions are linked to their respective rollers, and a mere film distribution position when the largest pinion stops transmitting movement to its roller.
  • roller pinions are linked to all the rollers -preferably through their rotating shafts- and there is a main pinion than the others, the roller associated with the larger roller pinion will rotate at a lower speed than the other roller, retaining the film and causing it to be stretched by the action of the other roller, which will rotate at a higher speed stretching the film.
  • rollers have the same diameter since if the rollers are of different diameters, this difference will have to be taken into account to calculate the perimeter speed of each roller.
  • connection/disconnection element such as a plate comprising means for attaching to the roller pinion and trapping the roller's rotating shaft transmitting the movement of the pinion to the roller.
  • the fastening means are easily removable allowing the removal of said plate in a quick and simple manner and thus disengaging the roller from its roller pinion.
  • roller and its rotating shaft are always linked and what varies is the linkage or disengagement with respect to its pinion.
  • pinion and rotating shaft could always be linked and the variable would be the linking or unlinking of the rotating shaft with respect to the roller.
  • Removing the roller pinion plate disengages the roller pinion from its roller's rotating shaft and no longer transmits the movement of the gearing to it.
  • rollers have an adherent surface, by friction, adhesive, gumming or any other way, suitable for the film not to slip on it.
  • the motor through its motor pinion, transmits the continuous movement to the larger pinion, the one with more teeth and larger diameter, and this transmits it to the smaller pinion, which generates a difference in the speed of rotation between rollers, this allows the operation of the reel carriage to be pre-stretching.
  • the concept of pre-stretching for the invention consists of causing the stretching of the film by means of the two close rollers with different rotation speeds.
  • the rollers rotate at different speeds to tension the film in a controlled manner.
  • the controlled film tension which is determined according to the load to be wrapped, allows optimizing the consumption and providing an adequate wrapping for each type of load.
  • the reel carriage comprises a lower and upper lamellar part joined together by conventional means.
  • the upper sheet part of the reel carriage has a series of holes suitable for housing each of the rollers' rotating shafts and a series of pinions geared together and transmitting the movement of a motor.
  • the pre-stretching function and its requirement are conditioned by whether the film reel is pre-stretched and the type of load to be wrapped.
  • the film leaves the reel on the reel support shaft, passes through the two rollers, and then leaves the reel carriage towards the load to be wrapped.
  • the motor is a servomotor that, thanks to its regulation system, provides the functions of an adjustable brake.
  • the pinions are interchangeable, allowing a different gear ratio between them.
  • the reel carriage includes a housing for the plate when it is not connected to the pinion and the rotating shaft of its roller.
  • the linkage between the pinion of the roller and the rotating shaft of its roller is achieved in a simple manner thanks to the geometry of the plate comprising a housing whose geometry traps the rotating shaft and prevents it from being able to roll in the housing so that only the joint rotation of plate and shaft is possible.
  • the present invention is neither unique nor limiting but merely expository of the object to be protected hereby.
  • the device comprises a gear driven by a motor (13).
  • the gearing comprises a transmission (6) in this case, a motor pinion, a main pinion (4) and a minor pinion (3) all meshed together such that the movement of the motor is transmitted to all the pinions.
  • the minor pinion (3) is linked to the second roller (7) in a way that the motion of the minor pinion (3) is constantly transmitted to that second roller.
  • the main pinion (4) presents means (16) for fixing a connection/disconnection element, in this case a plate (8) in a removable manner. These means are a plurality of threaded holes in the body of the main pinion.
  • the rotating shaft of the first roller is free and the movement of the main pinion (4) is not transmitted to this rotating shaft.
  • the first roller can move by the action of the film being pulled by the second roller (7) or by the movement of the reel carriage around the load.
  • the film in its path, passes through both rollers and due to the fact that the surface of these rollers is anti-slip (due to the presence of rubber, adhesive, material with high friction index or any other cause) the difference in speed in its rotation in pre-stretching position, produces a tension of the film which is the desired effect of pre-stretching.
  • the motor drives the second roller by regulating its speed to slow it down and maintain the film at a given tension at the time of wrapping in combination with the speed of the rotating arm of the wrapper in which the device is mounted.
  • the motor (13), gearing and rollers are mounted on a reel holder carriage (9) comprising a lower (11) and upper (10) sheet piece with the appropriate machining to accommodate the ends of the rollers and pinions rotating shaft.
  • the film reel carriage (9) also includes the film reel support shaft (12).
  • the speed difference between the rollers allows the film to run through the reel carriage (9) with a tension that is preset according to the load to be wrapped.
  • the plate (8) on the main pinion (4) has a suitable space and means (16) for fastening, in this case some threaded holes in the body of the main pinion (4) suitable for screwing some screws to fasten the plate (8) and the main pinion (4).
  • the motor (13) provides continuous motion to the gearing such that when the plate (8) is removed from the first pinion (4) the speed differential between the rollers is interrupted and the first roller (5) is pulled by the displacement of the film caused by the movement of the rotating arm or by the movement of the second roller or by a combination of both, in a state without pre-stretching.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
EP22161434.0A 2021-03-11 2022-03-10 Film pre-stretching and brake device for reel carriage on a wrapping machine Pending EP4056483A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES202130501U ES1270355Y (es) 2021-03-11 2021-03-11 Dispositivo de preestiro y freno de film para carro portabobinas en una enfardadora

Publications (1)

Publication Number Publication Date
EP4056483A1 true EP4056483A1 (en) 2022-09-14

Family

ID=76275584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22161434.0A Pending EP4056483A1 (en) 2021-03-11 2022-03-10 Film pre-stretching and brake device for reel carriage on a wrapping machine

Country Status (2)

Country Link
EP (1) EP4056483A1 (es)
ES (1) ES1270355Y (es)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2000870A6 (es) 1986-07-08 1988-03-16 Serpack Sa Procedimiento para estirar una banda de empaquetar en una enfardadora.
EP0268272A2 (en) 1986-11-17 1988-05-25 Solarex Corporation Method of removing electrical shorts and shunts from a thin-film semiconductor device
ES2082902T3 (es) 1990-10-02 1996-04-01 Lantech Inc Procedimiento y aparato para estirar transversal o biaxialmente una lamina, adaptada para la envoltura estirada de una carga.
EP1213223A1 (en) * 2000-11-14 2002-06-12 OFFICINA MECCANICA SESTESE S.p.A. Device for unwinding stretchable plastic film
ES2341209A1 (es) 2008-07-22 2010-06-16 Aranguren Comercial Del Embalaje, S.L. Maquina enfardadora.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2000870A6 (es) 1986-07-08 1988-03-16 Serpack Sa Procedimiento para estirar una banda de empaquetar en una enfardadora.
EP0268272A2 (en) 1986-11-17 1988-05-25 Solarex Corporation Method of removing electrical shorts and shunts from a thin-film semiconductor device
ES2082902T3 (es) 1990-10-02 1996-04-01 Lantech Inc Procedimiento y aparato para estirar transversal o biaxialmente una lamina, adaptada para la envoltura estirada de una carga.
EP1213223A1 (en) * 2000-11-14 2002-06-12 OFFICINA MECCANICA SESTESE S.p.A. Device for unwinding stretchable plastic film
ES2341209A1 (es) 2008-07-22 2010-06-16 Aranguren Comercial Del Embalaje, S.L. Maquina enfardadora.

Also Published As

Publication number Publication date
ES1270355U (es) 2021-06-14
ES1270355Y (es) 2021-09-29

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