EP3119710B1 - Method and machine for producing small-width bobbins of film consisting of a stretchable plastic material, from a large-width bobbin - Google Patents
Method and machine for producing small-width bobbins of film consisting of a stretchable plastic material, from a large-width bobbin Download PDFInfo
- Publication number
- EP3119710B1 EP3119710B1 EP15714563.2A EP15714563A EP3119710B1 EP 3119710 B1 EP3119710 B1 EP 3119710B1 EP 15714563 A EP15714563 A EP 15714563A EP 3119710 B1 EP3119710 B1 EP 3119710B1
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- EP
- European Patent Office
- Prior art keywords
- strips
- width
- film
- widths
- roll
- 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.)
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- 238000000034 method Methods 0.000 title claims description 9
- 239000000463 material Substances 0.000 title claims description 4
- 229920003023 plastic Polymers 0.000 title claims 3
- 239000004033 plastic Substances 0.000 title claims 3
- 229920006302 stretch film Polymers 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims 4
- 238000004804 winding Methods 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002985 plastic film Substances 0.000 description 6
- 229920006255 plastic film Polymers 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003416 augmentation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000763 evoking effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
- B65H18/10—Mechanisms in which power is applied to web-roll spindle
- B65H18/103—Reel-to-reel type web winding and unwinding mechanisms
-
- 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
- B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
-
- 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
- B65H2301/30—Orientation, displacement, position of the handled material
- B65H2301/31—Features of transport path
- B65H2301/311—Features of transport path for transport path in plane of handled material, e.g. geometry
- B65H2301/3112—S-shaped
-
- 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
- B65H2301/414—Winding
- B65H2301/4148—Winding slitting
-
- 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
- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/51—Modifying a characteristic of handled material
- B65H2301/512—Changing form of handled material
- B65H2301/5124—Stretching; Tentering
-
- 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
- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/51—Modifying a characteristic of handled material
- B65H2301/515—Cutting handled material
- B65H2301/5153—Details of cutting means
- B65H2301/51532—Blade cutter, e.g. single blade cutter
- B65H2301/515326—Multiple blade cutter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/17—Nature of material
- B65H2701/175—Plastic
- B65H2701/1752—Polymer film
Definitions
- the invention relates to the technical sector of stretchable plastic films in particular in the field of packaging.
- the invention relates to a method and a machine for making coils of small widths of stretchable plastic film from a wide-width reel for continuously unrolling the stretchable film.
- This type of stretch film is well known to a person skilled in the art and has many advantages in view of its essential characteristic of being able to undergo an important lengthening which can be 500% compared to its initial length without being torn under this effect. elongation. The result is to be able to significantly reduce the quantities of material while allowing the assembly of various products given the tension exerted by the stretch film under the effect of its elongation.
- One of the problems to be solved by the invention is to be able, from a reel of stretch film of large width, to wind on mandrels arranged in a juxtaposed manner on a single winding bar, the different widths precut to achieve concomitantly the number of desired coils of small widths of stretch film.
- the invention also relates to a machine for producing coils of small widths of stretch plastic film advantageously implementing the method according to the invention.
- the cutting means are constituted by blades arranged parallel and in alignment perpendicular to the direction of unwinding of the film, being shifted according to a distance corresponding to the desired width of the width.
- Cutting blades are mounted on a fixed support bar arranged parallel to the film and perpendicular to the running direction of said film.
- the means for stretching the widths are constituted by two motorized rollers and superimposed driven in the opposite direction, the widths successively passing from the mother reel, on one of the rollers , between the two rollers, then on the other roll, to be conveyed towards the winding means of said widths, said rollers being driven at different speeds.
- the means for winding the widths consist of a motorized roller arranged opposite a winding bar of said widths and driven at a different speed, especially lower, the speed of the drawing rollers.
- the mandrels are rotatably mounted in a position of juxtaposition on said common bar arranged parallel to the drive roller and substantially in tangency position.
- the mandrels are rotatably mounted on a plurality of common bars coupled to a rotating support disk by being circularly offset and arranged parallel to each other and relative to the drive roller in order to be successively brought into position. tangency with said roll.
- the invention applies, as evoked, to any type of stretchable plastic film (F). It is recalled that the aim is to produce, from a reel (1) on which the stretchable film (F) is wound, this reel (1) being generally known under the name of reel, reels of small widths (11). These coils of small widths are constituted by a winding on mandrels (2), widths (L), resulting from cuts formed over the entire width of the film (F) in the direction of the length and scroll of the latter.
- the stretchable film (F) is cut at the exit of the reel (1) of large width to achieve the widths (L) whose width and number correspond to the desired small width reels (11).
- widths thus formed are then stretched to cause a separation of the cutting lines (C), which spacing results from the decrease of the width of the widths following the stretching action to which they are subjected. At this level, the widths (L) are no longer joined.
- the stretching tension of each of the widths is then released and simultaneously rolled up in the relaxed state on the mandrels (2) to produce the rolls of small widths.
- FIG. 2 It has been illustrated, in particular figure 2 , an embodiment of a machine for the production of several coils of stretchable plastic film of small widths and from a coil (1) as indicated above.
- the film (F), wound on a roll (1a) receiving the mother reel, is conveyed, in relation with a return roller (3), at a cutting station (4) shaped to produce the widths (L ).
- this cutting station (4) comprises blades (4a) arranged parallel and in alignment perpendicular to the unwinding direction of the film (F).
- the blades (4a) are offset at a distance corresponding to the desired width of the width.
- the cutting blades (4a) are mounted on a fixed support bar (4b) arranged parallel to the film and perpendicular to the direction of travel of the latter.
- the machine comprises a station adapted to stretch the widths (L) to reduce their width in order to move away, concomitantly, the cutting lines (C) so that said widths are not more joined.
- This stretching station consists of two motorized rollers and superimposed (5) and (6) positively rotated in the opposite direction.
- the widths pass successively on the upper roll (5), between the two rollers (5) and (6), then on the lower roll (6) in order to be conveyed towards a winding station for the formation of coils of small widths.
- the rollers (5) and (6) are driven at different speeds.
- the widths (L) are then conveyed, by way of return rollers (7), to the winding station consisting essentially of a motorized roller (8) and a cylindrical common bar (9) arranged parallel to the roller (8) substantially in tangent position.
- This bar (9) is intended to receive the different mandrels (2) in the juxtaposition position.
- the roll (8) is driven at a speed less than the speed of the draw rolls (5) and (6).
- the different mandrels (2) are mounted free to rotate on the bar (9) to ensure the winding of the widths as and when under the effect of driving the winding roller (8).
- the mandrels (2) are rotatably mounted on several bars (9) mounted on a rotating support disk (10). ) being circularly offset and arranged parallel to each other and to the winding roller (8). Due to the rotational movement of the support (10), the bars (9) with the mandrels (2) can therefore be successively brought into the tangent position with the winding roller (8).
Landscapes
- Winding Of Webs (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
Description
L'invention se rattache au secteur technique des films en matière plastique étirable notamment dans le domaine de l'emballage.The invention relates to the technical sector of stretchable plastic films in particular in the field of packaging.
Plus particulièrement, l'invention concerne un procédé et une machine pour réaliser des bobines de petites largeurs de film en matière plastique étirable à partir d'une bobine de grande largeur pour dérouler en continu le film étirable.More particularly, the invention relates to a method and a machine for making coils of small widths of stretchable plastic film from a wide-width reel for continuously unrolling the stretchable film.
Ce type de film étirable est parfaitement connu pour un homme du métier et présente de nombreux avantages compte tenu de sa caractéristique essentielle de pouvoir subir un allongement important qui peut être de 500 % par rapport à sa longueur initiale sans pour autant être déchiré sous cet effet d'allongement. Il en résulte de pouvoir diminuer de manière importante les quantités de matière tout en permettant l'assemblage de produits divers compte tenu de la tension exercée par le film étirable sous l'effet de son allongement.This type of stretch film is well known to a person skilled in the art and has many advantages in view of its essential characteristic of being able to undergo an important lengthening which can be 500% compared to its initial length without being torn under this effect. elongation. The result is to be able to significantly reduce the quantities of material while allowing the assembly of various products given the tension exerted by the stretch film under the effect of its elongation.
Il est également connu, pour un homme du métier, de réaliser des bobines de film étirable de petites largeurs, par exemple de l'ordre de 15 cm à partir d'une bobine de film étirable de grande largeur, dite bobine mère, de l'ordre par exemple de 60 cm. Selon l'état de la technique, pour la réalisation de ces bobines de petites largeurs, en considérant que le film est déroulé en continu à partir de la bobine mère, en combinaison avec différents rouleaux de renvoi dont certains sont motorisés, il est nécessaire, après avoir coupé le film étirable à la sortie de ladite bobine mère pour réaliser des laizes de largeur et de nombres correspondants aux bobines souhaitées, d'enrouler ces laizes de manière décalée afin d'éviter le chevauchement de ces dernières au fur et à mesure de l'enroulement. Il en résulte, pour l'opérateur, une obligation de changer très souvent les barres d'enroulement sur lesquelles sont disposés des mandrins qui coopèrent avec les laizes pour réaliser les bobines de petites largeurs.It is also known, for a person skilled in the art, to produce reels of stretch film of small widths, for example of the order of 15 cm from a reel of stretch film of great width, called the mother reel, of the order for example of 60 cm. According to the state of the art, for the realization of these coils of small widths, considering that the film is unrolled continuously from the mother reel, in combination with different return rollers some of which are motorized, it is necessary, after having cut the stretchable film at the output of said mother reel to produce breadths of width and numbers corresponding to the desired reels, to wind these widths in a staggered manner to avoid the overlap of the latter as and when winding. This results, for the operator, an obligation to very often change the winding bars on which are arranged mandrels that cooperate with the widths to make the coils small widths.
Ces différentes manipulations génèrent, par conséquent, un temps d'arrêt important en observant, par ailleurs, l'obligation de mettre entre chaque mandrin destiné à l'enroulement des laizes, des tubes entretoises.These different manipulations generate, therefore, a significant downtime by observing, moreover, the obligation to put between each mandrel for winding rolls, spacers tubes.
Par ailleurs, on a observé que le résultat obtenu n'est pas toujours satisfaisant, étant donné que la tension du film étirable n'est pas réellement maîtrisée de sorte que les bords des bobines obtenues ne sont pas parfaitement lisses et réguliers. Un procédé et une machine représentant l'état de la technique sont divulgués dans le document
Un des problèmes que se propose de résoudre l'invention est de pouvoir, à partir d'une bobine de film étirable de grande largeur, enrouler sur des mandrins disposés de manière juxtaposée sur une seule barre d'enroulement, les différentes laizes prédécoupées pour réaliser de manière concomitante le nombre de bobines souhaitées de petites largeurs de film étirable.One of the problems to be solved by the invention is to be able, from a reel of stretch film of large width, to wind on mandrels arranged in a juxtaposed manner on a single winding bar, the different widths precut to achieve concomitantly the number of desired coils of small widths of stretch film.
Pour résoudre un tel problème, il a été conçu et mis au point un procédé pour réaliser des bobines de petites largeurs de film en matière plastique étirable, à partir d'une bobine de grande largeur où est déroulé en continu ledit film. Selon le procédé de l'invention :
- on coupe le film étirable à la sortie de la bobine de grande largeur pour réaliser des laizes de largeur et de nombres correspondants aux bobines souhaitées,
- on étire les laizes provoquant un écartement des lignes de coupe suite à la diminution de la largeur desdites laizes résultant de l'étirement,
- on relâche la tension d'étirement de chacune des laizes,
- on enroule à l'état relâché les laizes sur des mandrins pour réaliser les bobines de petites largeurs.
- the stretchable film is cut at the exit of the large-width reel to produce widths and numbers corresponding to the desired reels,
- stretching the widths causing a spacing of the cutting lines due to the decrease in the width of said widths resulting from the stretching,
- we release the stretching tension of each width,
- the widths are rolled in the relaxed state on mandrels to produce the coils of small widths.
L'invention concerne également une machine pour réaliser des bobines de petites largeurs de film en matière plastique étirable mettant avantageusement en oeuvre le procédé selon l'invention.The invention also relates to a machine for producing coils of small widths of stretch plastic film advantageously implementing the method according to the invention.
Dans ce but, la machine comprend :
- une bobine mère à partir de laquelle est déroulé en continu le film étirable,
- des moyens de coupe aptes à réaliser des laizes dont la largeur et le nombre correspondent aux bobines à réaliser,
- des moyens aptes à étirer les laizes pour diminuer leur largeur afin d'écarter d'une manière concomitante les lignes de coupe,
- des moyens d'enroulement des laizes à l'état relâché, sur des mandrins pour réaliser les bobines de petites largeurs.
- a mother reel from which the stretch film is unwound continuously,
- cutting means adapted to produce widths whose width and number correspond to the coils to be produced,
- means capable of stretching the widths to reduce their width in order to concomitantly distance the cutting lines,
- means for winding the widths in the relaxed state, on mandrels for making the coils of small widths.
Pour résoudre le problème posé de réaliser en continu des laizes de largeurs déterminées et à partir de la bobine de grande largeur, les moyens de coupe sont constitués par des lames disposées parallèlement et en alignement perpendiculaire au sens de déroulement du film, en étant décalées selon une distance correspondant à la largeur souhaitée de la laize. Les lames de coupe sont montées sur une barre support fixe disposée parallèlement au film et perpendiculairement au sens de défilement dudit film.To solve the problem of continuously making widths of determined widths and from the wide-width reel, the cutting means are constituted by blades arranged parallel and in alignment perpendicular to the direction of unwinding of the film, being shifted according to a distance corresponding to the desired width of the width. Cutting blades are mounted on a fixed support bar arranged parallel to the film and perpendicular to the running direction of said film.
Pour résoudre le problème posé de diminuer temporairement la largeur des laizes, les moyens aptes à étirer les laizes, sont constitués par deux rouleaux motorisés et superposés entraînés en sens inverse, les laizes passant successivement, depuis la bobine mère, sur l'un des rouleaux, entre les deux rouleaux, puis sur l'autre rouleau, pour être acheminées en direction des moyens d'enroulement desdites laizes, lesdits rouleaux étant entraînés à des vitesses différentes.To solve the problem of temporarily reducing the width of the widths, the means for stretching the widths, are constituted by two motorized rollers and superimposed driven in the opposite direction, the widths successively passing from the mother reel, on one of the rollers , between the two rollers, then on the other roll, to be conveyed towards the winding means of said widths, said rollers being driven at different speeds.
Pour résoudre le problème posé de réaliser les bobines de petites largeurs en tant que telles, les moyens d'enroulement des laizes, à l'état relâché, sont constitués par un rouleau motorisé disposé en regard d'une barre d'enroulement desdites laizes et entraîné à une vitesse différente, notamment inférieure, de la vitesse des rouleaux d'étirage.In order to solve the problem of making the rolls of small widths as such, the means for winding the widths, in the relaxed state, consist of a motorized roller arranged opposite a winding bar of said widths and driven at a different speed, especially lower, the speed of the drawing rollers.
Selon une autre caractéristique et pour résoudre le problème posé de réaliser les bobines de petites largeurs sur une seule barre d'enroulement, les mandrins sont montés libres en rotation en position de juxtaposition sur ladite barre commune disposée parallèlement au rouleau d'entraînement et sensiblement en position de tangence.According to another characteristic and to solve the problem of making small-width coils on a single winding bar, the mandrels are rotatably mounted in a position of juxtaposition on said common bar arranged parallel to the drive roller and substantially in tangency position.
Avantageusement, pour augmenter les cadences de production, les mandrins sont montés libres en rotation sur plusieurs barres communes accouplées à un disque support rotatif en étant décalées circulairement et disposées parallèlement entre elles et par rapport au rouleau d'entraînement pour être amenées successivement en position de tangence avec ledit rouleau.Advantageously, in order to increase the production rates, the mandrels are rotatably mounted on a plurality of common bars coupled to a rotating support disk by being circularly offset and arranged parallel to each other and relative to the drive roller in order to be successively brought into position. tangency with said roll.
L'invention est exposée ci-après plus en détail à l'aide des figures des dessins annexés dans lesquels :
- la
figure 1 est une vue à caractère schématique montrant les principales étapes de procédé selon l'invention, - la
figure 2 est une vue en perspective à caractère schématique des principaux éléments de la machine.
- the
figure 1 is a schematic view showing the main process steps according to the invention, - the
figure 2 is a schematic perspective view of the main elements of the machine.
L'invention s'applique, comme évoqué, à tout type de film en matière plastique étirable (F). On rappelle que le but recherché est de réaliser, à partir d'une bobine (1) sur laquelle est enroulé le film étirable (F), cette bobine (1) étant généralement connue sous le nom de bobine mère, des bobines de petites largeurs (11). Ces bobines de petites largeurs sont constituées par un enroulement sur des mandrins (2), de laizes (L), résultant de coupes formées sur toute la largeur du film (F) dans le sens de la longueur et de défilement de ce dernier.The invention applies, as evoked, to any type of stretchable plastic film (F). It is recalled that the aim is to produce, from a reel (1) on which the stretchable film (F) is wound, this reel (1) being generally known under the name of reel, reels of small widths (11). These coils of small widths are constituted by a winding on mandrels (2), widths (L), resulting from cuts formed over the entire width of the film (F) in the direction of the length and scroll of the latter.
Ainsi, selon le procédé de l'invention, le film étirable (F) est découpé à la sortie de la bobine (1) de grande largeur pour réaliser les laizes (L) dont la largeur et le nombre correspondent aux bobines de petites largeurs souhaitées (11).Thus, according to the method of the invention, the stretchable film (F) is cut at the exit of the reel (1) of large width to achieve the widths (L) whose width and number correspond to the desired small width reels (11).
Les laizes ainsi formées sont ensuite étirées afin de provoquer un écartement des lignes de coupe (C), lequel écartement résulte de la diminution de la largeur des laizes suite à l'action d'étirement à laquelle elles sont soumises. A ce niveau, les laizes (L) ne sont donc plus jointives. On relâche ensuite la tension d'étirement de chacune des laizes et on les enroule simultanément à l'état relâché sur les mandrins (2) pour réaliser les bobines de petites largeurs.The widths thus formed are then stretched to cause a separation of the cutting lines (C), which spacing results from the decrease of the width of the widths following the stretching action to which they are subjected. At this level, the widths (L) are no longer joined. The stretching tension of each of the widths is then released and simultaneously rolled up in the relaxed state on the mandrels (2) to produce the rolls of small widths.
On a illustré, notamment à la
Le film (F), enroulé sur un rouleau (1a) recevant la bobine mère, est acheminé, en relation avec un rouleau de renvoi (3), au niveau d'un poste de coupe (4) conformé pour réaliser les laizes (L). Par exemple, ce poste de coupe (4) comprend des lames (4a) disposées parallèlement et en alignement perpendiculaire au sens de déroulement du film (F). Les lames (4a) sont décalées selon une distance correspondant à la largeur souhaitée de la laize. Dans l'exemple illustré, les lames de coupe (4a) sont montées sur une barre support fixe (4b) disposée parallèlement au film et perpendiculairement au sens de défilement de ce dernier. Il apparait donc, au fur et à mesure du défilement du film (F), que les différentes lames (4a) vont réaliser des coupes (C) parallèles entre elles et parallèles aux bords longitudinaux du film (F) afin de former, de manière concomitante, les laizes (L) destinées à constituer les bobines de petites largeurs après avoir été enroulées sur les mandrins (2).The film (F), wound on a roll (1a) receiving the mother reel, is conveyed, in relation with a return roller (3), at a cutting station (4) shaped to produce the widths (L ). For example, this cutting station (4) comprises blades (4a) arranged parallel and in alignment perpendicular to the unwinding direction of the film (F). The blades (4a) are offset at a distance corresponding to the desired width of the width. In the illustrated example, the cutting blades (4a) are mounted on a fixed support bar (4b) arranged parallel to the film and perpendicular to the direction of travel of the latter. It therefore appears, as the film (F) travels, that the different blades (4a) will make cuts (C) parallel to each other and parallel to the longitudinal edges of the film (F) so as to form, concomitantly, the widths (L) intended to constitute the coils of small widths after having been wound on the mandrels (2).
A la sortie du poste de coupe (C), la machine comprend un poste apte à étirer les laizes (L) pour diminuer leur largeur afin d'écarter, de manière concomitante, les lignes de coupe (C) pour que lesdites laizes ne soient plus jointives.At the output of the cutting station (C), the machine comprises a station adapted to stretch the widths (L) to reduce their width in order to move away, concomitantly, the cutting lines (C) so that said widths are not more joined.
Ce poste d'étirement est constitué de deux rouleaux motorisés et superposés (5) et (6) entraînés positivement en rotation en sens inverse. A la sortie du poste de coupe, les laizes passent successivement sur le rouleau supérieur (5), entre les deux rouleaux (5) et (6), puis sur le rouleau inférieur (6) afin d'être acheminées en direction d'un poste d'enroulement pour la formation des bobines de petites largeurs.This stretching station consists of two motorized rollers and superimposed (5) and (6) positively rotated in the opposite direction. At the exit of the cutting station, the widths pass successively on the upper roll (5), between the two rollers (5) and (6), then on the lower roll (6) in order to be conveyed towards a winding station for the formation of coils of small widths.
Pour réaliser l'action d'étirement des laizes, les rouleaux (5) et (6) sont entraînés à des vitesses différentes.To perform the stretching action of the widths, the rollers (5) and (6) are driven at different speeds.
Les laizes (L) sont ensuite acheminées, en passant par des rouleaux de renvoi (7), vers le poste d'enroulement constitué essentiellement d'un rouleau motorisé (8) et d'une barre commune cylindrique (9) disposée parallèlement au rouleau (8) sensiblement en position de tangence. Cette barre (9) est destinée à recevoir les différents mandrins (2), en position de juxtaposition. Pour assurer un enroulement à l'état relâché des laizes, le rouleau (8) est entraîné à une vitesse inférieure à la vitesse des rouleaux d'étirage (5) et (6). Les différents mandrins (2) sont montés libres en rotation sur la barre (9) en vue d'assurer le bobinage des laizes au fur et à mesure sous l'effet de l'entraînement du rouleau d'enroulement (8).The widths (L) are then conveyed, by way of return rollers (7), to the winding station consisting essentially of a motorized roller (8) and a cylindrical common bar (9) arranged parallel to the roller (8) substantially in tangent position. This bar (9) is intended to receive the different mandrels (2) in the juxtaposition position. To ensure that the rolls are wound loose, the roll (8) is driven at a speed less than the speed of the draw rolls (5) and (6). The different mandrels (2) are mounted free to rotate on the bar (9) to ensure the winding of the widths as and when under the effect of driving the winding roller (8).
Il résulte donc de ces dispositions que le bobinage des différentes laizes ne s'effectue plus de manière décalée comme c'est le cas selon l'état de la technique, mais simultanément sur une seule barre recevant les différents mandrins.It follows therefore from these provisions that the winding of the different widths is no longer performed staggered as is the case according to the state of the art, but simultaneously on a single bar receiving the different mandrels.
Pour augmenter les cadences de production, avec pour objectif de réaliser des bobines de petits diamètres (11) à partir de plusieurs barres, les mandrins (2) sont montés libres en rotation sur plusieurs barres (9) montées sur un disque support rotatif (10) en étant décalées circulairement et disposées parallèlement entre elles et par rapport au rouleau d'enroulement (8). Sous l'effet du déplacement en rotation du support (10), les barres (9) avec les mandrins (2) peuvent par conséquent être amenées successivement en position de tangence avec le rouleau d'enroulement (8).To increase the production rates, with the aim of producing coils of small diameters (11) from several bars, the mandrels (2) are rotatably mounted on several bars (9) mounted on a rotating support disk (10). ) being circularly offset and arranged parallel to each other and to the winding roller (8). Due to the rotational movement of the support (10), the bars (9) with the mandrels (2) can therefore be successively brought into the tangent position with the winding roller (8).
Les avantages ressortent bien de la description, en particulier on souligne et on rappelle :
- La possibilité de réaliser des bobines film étirable de petites largeurs, à partir d'une seule barre commune d'enroulement recevant en juxtaposition les différents mandrins.
- La qualité de résultat obtenu au niveau des bords des bobines étant donné que la tension du film est parfaitement maîtrisée.
- L'augmentation de la cadence de production en considérant la diminution du temps d'intervention au niveau du changement des mandrins.
- The possibility of producing stretch film coils of small widths, from a single common winding bar receiving in juxtaposition the different mandrels.
- The result quality obtained at the edges of the coils, since the tension of the film is perfectly controlled.
- The increase in the rate of production considering the reduction of the intervention time at the level of the change of the mandrels.
Claims (8)
- A method of forming small-width rolls of film (F) of a stretch plastics material, from a large-width roll (1) from which said film is unrolled continuously, wherein:- the stretch film is cut as it is unrolled from the large-width roll (1) to form strips (L) of widths and in number corresponding to the desired rolls;said method being characterized in that:- the strips (L) are stretched, thereby causing the cutting lines to be spaced apart due to the reduction in the widths of said strips (L) resulting from the stretching;- the stretch tension on each of the strips (L) is relaxed;- the strips (L) are rolled up in the relaxed state onto mandrels (2) for forming the small-width rolls (11).
- A machine for forming small-width rolls (11) of film (F) of a stretch plastics material, from a large-width roll (1) from which said film is unrolled continuously, said machine comprising:- a mother roll (1) from which the stretch film (F) is unrolled continuously;- cutting means (4) for forming strips (L) of widths and in number corresponding to the rolls (11) to be formed;said machine being characterized in that it further comprises:- means suitable for stretching the strips (L) so as to reduce their widths, thereby concomitantly causing the cutting lines (C) to be spaced apart;- means for rolling up the strips (L) in the relaxed state onto mandrels (2) for forming the small-width rolls (11).
- A machine according to claim 2, characterized in that the cutting means (4) are constituted by blades (4a) disposed mutually parallel in a line perpendicular to the direction of unrolling of the film, while being mutually offset by distances corresponding to the desired widths of the strips.
- A machine according to claim 2, characterized in that the cutting blades (4a) are mounted on a stationary support bar (4b) disposed parallel to the width of the film (F) and perpendicular to the direction of unrolling of said film.
- A machine according to any one of claims 2 to 4, characterized in that the means suitable for stretching the strips are constituted by two motor-driven and superposed rollers (5 and 6) driven in opposite directions, the strips passing successively from the mother roll (1), over one of the rollers (5), between the two rollers (5 and 6), and then over the other roller (6) so as to be brought towards the means for rolling up said strips, said rollers (5 and 6) being driven at different speeds.
- A machine according to any one of claims 2 to 5, characterized in that the means for rolling up the strips, in the relaxed state, are constituted by a motor-driven roller (8) disposed facing a roll-up bar (9) for rolling up said strips and driven at a speed different from, and in particular less than, the speeds of the stretching rollers (5 and 6).
- A machine according to claim 6, characterized in that the mandrels (2) are mounted to be free to rotate in juxtaposed positions on the common roll-up bar (9) disposed parallel to the drive roller (8) and in a position in which it is substantially tangential thereto.
- A machine according to claim 7, characterized in that the mandrels (2) are mounted to be free to rotate on respective ones of a plurality of common bars (9) that are coupled to a rotary support disk (10) while being mutually offset circularly and being disposed parallel to one another and to the drive roller (8) so as to be brought, in succession, into the position in which they are tangential to said roller.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1452300A FR3018796B1 (en) | 2014-03-20 | 2014-03-20 | METHOD AND MACHINE FOR REALIZING SMALL WIDTH OF FILM OF STRETCHABLE PLASTIC MATERIAL FROM A WIDE RANGE SPOOL. |
PCT/FR2015/050522 WO2015140438A1 (en) | 2014-03-20 | 2015-03-04 | Method and machine for producing small-width bobbins of film consisting of a stretchable plastic material, from a large-width bobbin |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3119710A1 EP3119710A1 (en) | 2017-01-25 |
EP3119710B1 true EP3119710B1 (en) | 2018-01-24 |
Family
ID=50513368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15714563.2A Active EP3119710B1 (en) | 2014-03-20 | 2015-03-04 | Method and machine for producing small-width bobbins of film consisting of a stretchable plastic material, from a large-width bobbin |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3119710B1 (en) |
ES (1) | ES2658306T3 (en) |
FR (1) | FR3018796B1 (en) |
WO (1) | WO2015140438A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107298329A (en) * | 2017-06-15 | 2017-10-27 | 南通三信塑胶装备科技股份有限公司 | A kind of winding process of film revolution winding station |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109794794A (en) * | 2018-12-21 | 2019-05-24 | 芜湖卓越空调零部件有限公司 | Air compressor machine steel plate feeding adjusts device |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2115737A (en) * | 1933-06-14 | 1938-05-03 | Menschner Johannes | Process and apparatus for measuring running webs |
US3719316A (en) * | 1971-04-22 | 1973-03-06 | Beloit Corp | Web spreader element |
US4572752A (en) * | 1982-11-12 | 1986-02-25 | Adolph Coors Company | Control stretch laminating device |
US20060243842A1 (en) * | 2005-04-28 | 2006-11-02 | Martin Guillermo Duran Espinoza Angel Gerardo Santillan Diaz De Leon | Pre-stretched wrapping film roll with entrapped air and method |
DE102010051481A1 (en) * | 2010-11-15 | 2012-05-16 | Rolf Hessenbruch | Apparatus for separating web, has spreader roller that spreads longitudinal cuts in web at constant spreading effect, and generates gap in web |
DE102012009648A1 (en) * | 2012-05-14 | 2013-11-14 | Weber Maschinenbau Gmbh Breidenbach | spreading |
-
2014
- 2014-03-20 FR FR1452300A patent/FR3018796B1/en not_active Expired - Fee Related
-
2015
- 2015-03-04 EP EP15714563.2A patent/EP3119710B1/en active Active
- 2015-03-04 ES ES15714563.2T patent/ES2658306T3/en active Active
- 2015-03-04 WO PCT/FR2015/050522 patent/WO2015140438A1/en active Application Filing
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107298329A (en) * | 2017-06-15 | 2017-10-27 | 南通三信塑胶装备科技股份有限公司 | A kind of winding process of film revolution winding station |
Also Published As
Publication number | Publication date |
---|---|
WO2015140438A1 (en) | 2015-09-24 |
ES2658306T3 (en) | 2018-03-09 |
FR3018796B1 (en) | 2016-05-27 |
EP3119710A1 (en) | 2017-01-25 |
FR3018796A1 (en) | 2015-09-25 |
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