EP3718910B1 - Device for heating batches of coated products and installation for packaging by bundling of product batches - Google Patents

Device for heating batches of coated products and installation for packaging by bundling of product batches Download PDF

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Publication number
EP3718910B1
EP3718910B1 EP20169396.7A EP20169396A EP3718910B1 EP 3718910 B1 EP3718910 B1 EP 3718910B1 EP 20169396 A EP20169396 A EP 20169396A EP 3718910 B1 EP3718910 B1 EP 3718910B1
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EP
European Patent Office
Prior art keywords
orifices
openings
heating
line
plate
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
EP20169396.7A
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German (de)
French (fr)
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EP3718910A1 (en
Inventor
Grégory CHOPLIN
François-Régis DE BRUNIER
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.)
Sidel Participations SAS
Original Assignee
Sidel Packing Solutions SAS
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Publication date
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Publication of EP3718910A1 publication Critical patent/EP3718910A1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B53/00Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02Shrinking wrappers, containers, or container covers during or after packaging by heat
    • B65B53/06Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
    • B65B53/063Tunnels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/02Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00Bundling articles
    • B65B13/18Details of, or auxiliary devices used in, bundling machines or bundling tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B35/00Supplying, feeding, arranging or orientating articles to be packaged
    • B65B35/30Arranging and feeding articles in groups
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B2220/00Specific aspects of the packaging operation
    • B65B2220/24Cooling filled packages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B59/00Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes

Definitions

  • the present invention falls within the field of the packaging of products within a line for the production and processing of said products.
  • Such products can be, in a non-limiting manner, containers, such as bottles, cans, cardboard bricks, or even such containers singly or grouped together in boxes, crates, cartons or bundles.
  • the products can receive several different successive treatments, ranging from the manufacture of the container by a plastic injection or stretch-blow molding operation, passing in particular through the filling, the closing by a cap and the labeling of single products, up to the packaging in batches of several grouped products.
  • each batch is formed by grouping together, in staggered rows or not, several products in a matrix arrangement, generally in the overall shape of a square or rectangular parallelepiped.
  • each batch can be maintained below by means of a support forming a bottom, for example a cardboard tray.
  • each batch can be wrapped, in particular covered with a film in order to hold the products together and to facilitate the handling of such a batch.
  • the invention relates to the packaging by bundling of several products grouped together in batches.
  • the bundling of products consists in grouping them into batches then in coating each batch of products by means of a sheet of a film of heat-shrinkable material.
  • a coated batch then undergoes a heating step so that the sheet conforms to the overall external shape of the batch.
  • the sheet of film shrinks under the effect of heat to apply a shrinkage ensuring the maintenance of the products grouped in batches.
  • Grouping into batches, coating and heating are carried out by means of a dedicated device of the bundler type, through several successive stations.
  • the heating of a coated batch is carried out by passing through an oven, of the tunnel oven type.
  • Each batch of products is transported on the upper face of one or more conveyors, from the entrance to the exit of said oven.
  • the same oven can include several distinct sections, joined one after the other, each conferring dedicated heating parameters for each batch passing through said oven.
  • the heating is carried out by heating means ensuring circulation of a flow of heated air towards the interior of the sections of said oven, preferably a heating means specific to each section.
  • the hot air is sent to the conveyor and makes it possible to heat the underside and the lower edges of the batches transported on the conveyor, essentially aiming at the part of the film sheet located under the batch of products, in view in particular to weld the ends of the coating sheet which, at the time of the prior coating, are superimposed and pressed against each other under the weight of the products of the batch.
  • the hot air is sent to the interior volume of the enclosure and makes it possible to heat the outside of the coated batch, with a view to effecting a contraction of the sheet of film so that a shrinkage comes. apply in contact with the products, by deforming the sheet so that it follows part of its contours.
  • each heating means comprises a heating block whose function is to heat the air passing through it.
  • a heating means also comprises a means for circulating the air heated by said heating block, in the form of a flow of heated air. At the outlet, this flow of heated air is sent to a circuit dividing and emerging, on the one hand, at the level of the conveyor of its section and, on the other hand, inside the volume of the enclosure of this same section.
  • ramps can be formed by the vertical side walls of the interior of the enclosure of each section of the oven, or else in the form of an independent element positioned inside the enclosure of each section.
  • At least two ramps are arranged vertically and parallel to each other, extending longitudinally along the direction of movement of the batches, over a length portion of each section.
  • Two ramps are spaced transversely at an interval, on the one hand, allowing the passage of the batches between said two ramps and, on the other hand, at a determined distance with respect to the side walls of the batches, in order to ensure the heating and the narrowed.
  • each ramp has a generally rectangular or trapezoidal parallelepipedic shape, hollow and closed.
  • Each ramp is connected to the outlet of the circuit through which the flow of heated air arrives and has a wall with orifices through which the hot air is expelled and directed towards the interior of the volume of its section.
  • Such orifices are generally identical, having a circular section, and are also generally evenly distributed over the surface of the wall of each ramp.
  • the orifices can be distributed along lines forming rows of orifices aligned horizontally and columns of orifices aligned vertically. Two adjacent rows include orifices spaced vertically at a pitch of a given height.
  • each of the orifices of a row is aligned vertically with the corresponding orifice of one or more adjacent rows, upper and/or lower, forming columns according to a regular mesh.
  • the orifices of two adjacent rows can be offset horizontally.
  • a row has orifices that do not belong to the columns of orifices of the adjacent row or rows.
  • a solid plate is mounted to move relative to the wall provided with orifices, so as to come face to face with the latter and close them.
  • a plate is mounted to move vertically, its descent closing the rows of orifices one by one, and vice versa.
  • the plate in order to close all the orifices, the plate must have a dimension equivalent to the wall of the ramp: the maximum amplitude of the displacement of a single plate then takes place according to a stroke requiring a corresponding space within the device, which must be sized accordingly.
  • the size of said plate is limited, its movements simultaneously only allowing certain rows or columns of orifices to be closed.
  • the reduced height of the plate only makes it possible to close certain rows of orifices, in particular freeing up the upper rows if the plate has to close the orifices located in the middle and in the lower part of the wall of the ramp.
  • An alternative resides in a plate provided with openings, distributed according to alignments corresponding to the lines of orifices to be closed. Said openings have dimensions equivalent to those of the orifices, in particular the same diameters. Thus, by moving the plate along a reduced stroke, equivalent to said diameter, it is possible to open or close all the orifices simultaneously.
  • the document CN 207 208 656 U discloses a device for heating batches of coated products comprising the features of the preamble of claim 1.
  • the invention starts from this observation and aims to overcome the drawbacks of the state of the art by proposing to be able to control the sealing of the successive lines of orifices of a ramp through at least one wall, with a maximum amplitude of its stroke provided in a limited manner, in particular not involving any modification of the dimensioning of the enclosure of the heating device.
  • the invention envisages providing openings at the level of at least one plate of means for closing off a ramp, said openings having in particular a specific dimensioning, depending on the diameter of the orifices, as well as their center distance.
  • the interval between at least the openings corresponding to two successive rows of orifices can be a function of said at least one spacing and of at least one of the sizes of an orifice of said two rows.
  • Said interval may be equivalent to said at least one center distance, reduced by one of the sizes of an orifice of one of said two lines.
  • the openings corresponding to said second line may comprise a length equivalent to the length of the openings corresponding to said first line, increased by at least one of the sizes of an orifice of one of said first line or second line.
  • Said plate can be movable vertically in said direction of movement, each alignment of the openings corresponding to each column.
  • Said plate can be moved horizontally in said direction of movement, each alignment of the openings corresponding to each row.
  • Said plate can be movable horizontally in said direction of movement, each alignment of the openings corresponding to each column and in that the lengths of the openings extend horizontally.
  • the holes of two adjacent rows (or columns) can be staggered horizontally (or vertically).
  • the openings corresponding to one of the lines of orifices can emerge through an edge of said plate.
  • Said plate can be movable according to a displacement pitch at least equivalent to the size of the orifices.
  • the interval between the openings of the same alignment and the lengths of the openings can be adapted according to the center distances between the orifices and the sizes of the orifices.
  • Such a conditioning installation is characterized in that said heating station comprises at least one device for heating batches of coated products according to the invention.
  • the dedicated openings of the invention make it possible to successively release or close the lines of orifices.
  • the invention makes it possible in particular to open or close the rows, columns or rows of orifices one by one.
  • the invention makes it possible to completely close all the orifices of a ramp, making it possible to stop the expulsion of air inside the enclosure, without intervening on the heating means.
  • the present invention relates to the packaging of products within a line for the production and processing of said products.
  • Such products can be, without limitation, containers, such as bottles, cans, cardboard bricks, or even such containers individually or grouped together in boxes, crates, cartons or bundles.
  • the products can receive several different successive treatments, ranging from the manufacture of the container by a plastic injection and/or stretch-blow molding operation, passing in particular through filling, closure with a cap and labeling of individual products, up to packaging in batches of several grouped products.
  • each batch is formed by grouping together, in staggered rows or not, several products in a matrix arrangement, generally in the overall shape of a square or rectangular parallelepiped.
  • each batch can be maintained below by means of a support forming a bottom, for example a cardboard tray.
  • each batch can be wrapped, in particular covered with a film in order to hold the products together and to facilitate the handling of such a batch.
  • the invention relates to the packaging by bundling of several products grouped together in batches.
  • the bundling of products consists in grouping them into batches then in coating each batch of products by means of a sheet of a film of heat-shrinkable material. A coated batch then undergoes a heating step so that the sheet conforms to the overall external shape of the batch.
  • This heating operation is carried out by means of a device for heating batches of coated products.
  • Such a heating device comprises at least one furnace, in particular of the tunnel type, provided with at least one section, preferably several sections abutting one after the other, forming an interior enclosure.
  • Such an enclosure extends from an entrance to an exit.
  • the heating device also comprises at least one coated product conveyor passing through said at least one section.
  • a single conveyor crosses the entire enclosure of the furnace, from the inlet to the outlet, extending in particular beyond upstream of the inlet and downstream of the outlet.
  • Said conveyor ensures, on the upper face, the transport of the batches of coated products, resting directly on their bottom or indirectly by means of a support, such as a tray or a cardboard box.
  • Said conveyor then transports the coated products in a longitudinal or substantially longitudinal conveying direction.
  • the heating device further comprises means for heating said au least one section.
  • Such heating means can be dedicated to a section or be shared between several sections.
  • Said heating means comprise at least one heating block, at least one circuit connecting said heating block and opening inside said at least one section, and at least one means for circulating an air flow heated by said heating block to said circuit.
  • the heating means ensure the heating of the air, its movement until it is expelled inside the enclosure of the oven, within one or more sections.
  • each heating means comprises at least one ramp 1 connected to the output of at least said circuit.
  • each heating means comprises several ramps 1, in particular at least one pair of ramps 1.
  • a ramp 1 extends along at least a part of said corresponding section and can therefore extend along a or more sections.
  • a ramp 1 can be constituted by the wall of the oven, extending over all or part of the height of said wall.
  • a ramp 1 can also be constituted by an independent component, positioned inside the enclosure.
  • Each ramp 1 extends vertically or substantially vertically. Several ramps 1 of the same heating means, in particular the two ramps 1 of a pair, extend parallel. Each ramp 1 extends in a longitudinal direction, parallel to the product conveying direction.
  • each ramp comprises an interior volume allowing the circulation of heated air.
  • Each ramp is therefore connected to the circuit, ensuring the connection with its interior volume.
  • This connection of a ramp 1 with the circuit is located in particular in the upper part. Said volume of a ramp is notably visible on the picture 2 .
  • said at least one ramp 1 comprises at least one wall provided with orifices 2. Between the orifices 2 the wall is therefore solid, except possibly for certain perforated parts for structural considerations of mobility or fixing.
  • a ramp 1 integrated into a wall of the furnace it is then this wall which is provided with orifices 2.
  • an independent ramp 1 in the case of an independent ramp 1, as can be seen in particular on the picture 2 , it can comprise two side walls, parallel or substantially parallel: one and/or the other of said side walls can be provided with said orifices 2. tapered face.
  • a ramp 4 can be closed by its peripheral walls, so as to define an interior volume.
  • the orifices 2 are provided crossing, communicating between the interior volume of each ramp 1 and the interior of the enclosure. Thus, the air arriving from the circuit circulates inside said volume of each ramp 4 and is expelled inside the enclosure via said orifices 2.
  • Such orifices 2 can be of equivalent sizes, in particular to within more or less a few millimeters.
  • the orifices 2 are generally circular in shape, but can be oblong or polygonal in shape, with rounded or straight edges. Therefore, the size of an orifice 2 corresponds to its largest dimension, in particular its diameter.
  • the size of the orifices 2 can be between 2 and 20 millimeters (mm), the size of each orifice 2 being in particular 5 mm.
  • Said orifices 2 are distributed in lines on the surface of said wall of said at least one ramp 1.
  • the orifices 2 are distributed regularly on the corresponding wall, but can also be distributed irregularly.
  • a regular distribution consists in particular of an equivalent distance, to within a few millimeters, of the orifices 2 of different rows, per row or column.
  • the rows of holes 2 extending horizontally form rows
  • the rows of holes 2 extending vertically form columns.
  • the adjacent orifices 2 of the same line are spaced apart according to at least a determined center distance.
  • the orifices 2 of the same row are spaced horizontally by a given center distance
  • the orifices 2 of the same column are spaced vertically by another given center distance, these two center distances possibly being equivalent or different. It will be noted that within the same line, row and/or column, the orifices 2 can be spaced apart at equivalent or different spacings.
  • the orifices 2 can form a rectangular matrix, the rows and columns being mutually perpendicular.
  • two successive lines in particular two rows one above the other, can be located in the same alignment, as can be seen in particular on the figures 3 to 5 , or else one can be shifted horizontally with respect to the other, as can be seen in particular on the figure 11 .
  • the orifices 2 of two adjacent rows (or columns) are offset horizontally (or vertically).
  • the heating device comprises at least one means 3 for closing the orifices 2 of at least two lines.
  • Such closure means comprises at least one plate 4. Said plate 4 is positioned close to the wall provided with orifices 2 of the ramp 1, preferably side by side and in contact.
  • Said plate 4 can be located inside but preferably outside of said ramp 1.
  • the plate 4 is provided to move along at least one direction of movement relative to said wall of said ramp 1. This movement is preferably a translation. According to one embodiment, as visible on the figures 3 to 5 , said plate 4 is movable in a vertical direction. According to another embodiment, as visible on the figures 7 and 8 , said plate 4 is movable in a horizontal direction. In the case of a plate 4 positioned against the wall of the ramp 1, the movement takes place by sliding one against the other. With such a sliding contact, the air passing through the orifices 2 may not or barely circulate between the wall and the plate 4.
  • the closure means 3 comprise a plate 4 per wall provided with orifices 2 of a ramp 1.
  • the closure means 3 comprise several plates 4 juxtaposed, in particular vertically as seen on the figure 12 ; several plates 4 make it possible in particular to reduce the stroke of each of them and to control their movement independently.
  • the closure means 3 may comprise means 5 for guiding said plate 4 with respect to said wall.
  • said guide means 5 may comprise at least one oblong or elongated hole, in particular rectilinear, provided through said plate 4, each hole being traversed by a lug fixed with respect to said wall; the movement of the plate 4 then follows the restriction of the shape of said hole, the lug sliding inside the hole from one to the other of its ends.
  • said plate 4 can be mounted on guide rails, in particular located at the edge of the corresponding wall of ramp 1.
  • the movement of said plate 4 can be carried out by means of specific actuators, in particular positioned laterally or in the upper part of said ramp 1.
  • the same actuator can simultaneously control the movement of one or more plates 4, by particular of two plates located on either side of the two side walls of the same plate 4.
  • said plate 4 comprises for each line of orifices 2 openings 6 spaced at an interval.
  • Each opening 6 has a length at least equivalent to the size of an orifice 2.
  • an opening 6 may have one of its dimensions slightly smaller, but preferably at least greater than the size of a corresponding orifice 2.
  • the openings 6 are distributed substantially according to the same configuration as the distribution of the orifices 2 of the corresponding wall.
  • a movement in one direction of the plate 4 makes it possible to position the openings 6 opposite the corresponding openings 2, allowing air to pass through said openings 2 and said openings 6 then aligned.
  • a movement in the opposite direction makes it possible to close the orifices 2, the material of the plate 4 located on one side of an opening 6 then coming to block the corresponding orifice 2.
  • said corresponding openings 6 form an alignment along said direction of movement of said plate 4 or transversely to said direction of movement of said plate 4.
  • said plate 4 is vertically movable in said direction of movement, each alignment of openings 6 then corresponds to each column, as visible in particular on the figures 3 to 5 .
  • said plate 4 is movable horizontally in said direction of movement, each alignment of openings 6 corresponding to each row.
  • the invention provides for allowing the closing of at least one line of orifices 2, preferably each line one by one.
  • the invention provides for limiting the displacement stroke of said plate 4 during passage from an open position of a line to a closed position of this same line, and vice versa. Consequently, the passage towards the opening or towards the closing of all the lines also induces a reduced stroke.
  • passage in the direction of movement in the opposite direction makes it possible to pass from the open position of said first line and second line, to a closed position of said first line while keeping the orifices of said second line open.
  • said corresponding openings 6 form an alignment along said direction of movement of said plate 4 or else transversely to said direction of movement of said plate 4. Therefore , said at least two successive openings 6 with different lengths belong to the same alignment.
  • the plate 4 is vertically movable and the openings 6 form an alignment by column according to said direction of vertical movement.
  • the first row of openings 6 located above has a dimension oriented vertically smaller than the dimension of the second row of openings 6 located below.
  • the plate 4 is movable horizontally and the openings 6 form an alignment by row according to said direction of horizontal displacement.
  • the first row of openings located above has a smaller dimension than the dimension of the openings 6 of the second row located below, which itself has a dimension of openings 6 smaller than the dimension of the openings 6 of the last row below.
  • the interval between at least the openings 6 corresponding to two successive lines of orifices is a function of said at least one spacing and of at least one of the sizes of an orifice 2 of said two lines.
  • said interval may be equivalent to said at least one center distance, reduced by one of the sizes of an orifice 2 of one of said two lines.
  • the openings 6 corresponding to said second line comprise a length equivalent to the length of the openings corresponding to said first line, increased by at least d one of the sizes of an orifice 2 of one of said first line or second line.
  • the second row of openings 6 may have dimensions equivalent to twice the dimensions of said orifices 2.
  • the different dimensions in particular the length of the openings 6 and the center distance between the openings 6, from a few millimeters (mm), in particular to more or less 1 at 5mm.
  • This adaptation makes it possible to offer a tolerance in the possible stopping positions during the movements of the plate 4, facilitating the opening or closing of one or more orifices 2. Such a tolerance fully ensures the opening of at least least one desired row while one or more others remain fully closed, and vice versa.
  • said plate 4 is movable horizontally in said direction of movement, each alignment of openings 6 corresponding to each column and in that the lengths of openings 6 extend horizontally.
  • the openings 6 corresponding to one of the lines of orifices 2 open out through an edge of said at least one plate 4.
  • said plate 4 is movable according to a displacement step at least equivalent to said size of the orifices 2.
  • the invention can provide that the interval between the openings 6 of the same alignment and the lengths of the openings 6 are adapted according to the center distances between the orifices 2 and the sizes of the orifices 2, in order to adapt to it and to allow the opening and closing of a line by displacement of the plate 4 according to its displacement pitch.
  • the plate 4 can pass through several intermediate positions, each position opens or closes a line (column or row) of orifices 2.
  • the stroke amplitude then corresponds to the sum of the sizes of its orifices 2, per line.
  • said installation comprises at least one device for heating batches of coated products as previously described.

Description

La présente invention entre dans le domaine du conditionnement de produits au sein d'une ligne de production et de traitement desdits produits.The present invention falls within the field of the packaging of products within a line for the production and processing of said products.

De tels produits peuvent être, de façon non limitative, des récipients, tels des bouteilles, cannettes, briques cartonnées, ou encore de tels récipients à l'unité ou regroupés au sein de boîtes, caisses, cartons ou fardeaux.Such products can be, in a non-limiting manner, containers, such as bottles, cans, cardboard bricks, or even such containers singly or grouped together in boxes, crates, cartons or bundles.

De manière connue, au sein d'une ligne industrielle, les produits peuvent recevoir plusieurs traitements successifs différents, allant de la fabrication du contenant par une opération d'injection plastique ou d'étirage-soufflage, en passant notamment par le remplissage, la fermeture par un bouchon et l'étiquetage des produits à l'unité., jusqu'au conditionnement en lots de plusieurs produits regroupés.In a known manner, within an industrial line, the products can receive several different successive treatments, ranging from the manufacture of the container by a plastic injection or stretch-blow molding operation, passing in particular through the filling, the closing by a cap and the labeling of single products, up to the packaging in batches of several grouped products.

En outre, chaque lot est constitué par regroupement, en quinconce ou non, de plusieurs produits selon une disposition en matrice, généralement de forme globalement parallélépipédique carrée ou rectangle. De façon complémentaire, chaque lot peut être maintenu inférieurement au moyen d'un support formant un fond, par exemple une barquette cartonnée.In addition, each batch is formed by grouping together, in staggered rows or not, several products in a matrix arrangement, generally in the overall shape of a square or rectangular parallelepiped. In addition, each batch can be maintained below by means of a support forming a bottom, for example a cardboard tray.

Une fois les produits regroupés en lots, chaque lot peut être enrobé, en particulier recouvert d'un film afin de maintenir les produits ensemble et de faciliter la manutention d'un tel lot.Once the products have been grouped into batches, each batch can be wrapped, in particular covered with a film in order to hold the products together and to facilitate the handling of such a batch.

L'invention vise le conditionnement par fardelage de plusieurs produits regroupés en lots.The invention relates to the packaging by bundling of several products grouped together in batches.

Le fardelage de produits consiste à les regrouper en lots puis à enrober chaque lot de produits au moyen d'une feuille d'un film en matériau thermorétractable. Un lot enrobé subit ensuite une étape de chauffage pour que la feuille vienne épouser la forme globale extérieure du lot. En somme, la feuille de film se rétracte sous l'effet de la chaleur pour appliquer un rétreint assurant le maintien des produits groupés en lot.The bundling of products consists in grouping them into batches then in coating each batch of products by means of a sheet of a film of heat-shrinkable material. A coated batch then undergoes a heating step so that the sheet conforms to the overall external shape of the batch. In short, the sheet of film shrinks under the effect of heat to apply a shrinkage ensuring the maintenance of the products grouped in batches.

Le regroupement en lots, l'enrobage et le chauffage sont réalisés au moyen d'un dispositif dédié de type fardeleuse, au travers de plusieurs postes successifs.Grouping into batches, coating and heating are carried out by means of a dedicated device of the bundler type, through several successive stations.

Plus avant, le chauffage d'un lot enrobé s'effectue en traversant un four, de type four tunnel. Chaque lot de produits est transporté en face supérieure d'un ou plusieurs convoyeurs, depuis l'entrée jusqu'à la sortie dudit four.Further, the heating of a coated batch is carried out by passing through an oven, of the tunnel oven type. Each batch of products is transported on the upper face of one or more conveyors, from the entrance to the exit of said oven.

Un même four peut comprendre plusieurs sections distinctes, aboutées les unes à la suite des autres, conférant chacune des paramètres dédiés de chauffage de chaque lot traversant ledit four.The same oven can include several distinct sections, joined one after the other, each conferring dedicated heating parameters for each batch passing through said oven.

En particulier, le chauffage s'effectue par des moyens de chauffage assurant une mise en circulation de flux d'air chauffé vers l'intérieur des sections dudit four, de préférence, un moyen de chauffage propre à chaque section.In particular, the heating is carried out by heating means ensuring circulation of a flow of heated air towards the interior of the sections of said oven, preferably a heating means specific to each section.

D'une part, l'air chaud est envoyé vers le convoyeur et permet de chauffer le dessous et les bords inférieurs des lots transportés sur le convoyeur, visant essentiellement la partie de la feuille du film située sous le lot de produits, en vue notamment d'opérer une soudure des extrémités de la feuille d'enrobage qui, au moment de l'enrobage préalable, sont superposées et pressées l'une contre l'autre sous le poids des produits du lot. D'autre part, l'air chaud est envoyé vers le volume intérieur de l'enceinte et permet de chauffer l'extérieur du lot enrobé, en vue d'effectuer une contraction de la feuille du film pour qu'un rétreint vienne s'appliquer en contact avec les produits, en déformant la feuille pour qu'elle vienne en épouser une partie des contours.On the one hand, the hot air is sent to the conveyor and makes it possible to heat the underside and the lower edges of the batches transported on the conveyor, essentially aiming at the part of the film sheet located under the batch of products, in view in particular to weld the ends of the coating sheet which, at the time of the prior coating, are superimposed and pressed against each other under the weight of the products of the batch. On the other hand, the hot air is sent to the interior volume of the enclosure and makes it possible to heat the outside of the coated batch, with a view to effecting a contraction of the sheet of film so that a shrinkage comes. apply in contact with the products, by deforming the sheet so that it follows part of its contours.

Plus avant, chaque moyen de chauffage comprend un bloc de chauffage ayant pour fonction de chauffer l'air qui le traverse. Un moyen de chauffage comprend aussi un moyen de mise en circulation de l'air chauffé par ledit bloc de chauffage, sous forme d'un flux d'air chauffé. En sortie, ce flux d'air chauffé est envoyé vers un circuit se divisant et débouchant, d'une part, au niveau du convoyeur de sa section et, d'autre part, à l'intérieur du volume de l'enceinte de cette même section.Further on, each heating means comprises a heating block whose function is to heat the air passing through it. A heating means also comprises a means for circulating the air heated by said heating block, in the form of a flow of heated air. At the outlet, this flow of heated air is sent to a circuit dividing and emerging, on the one hand, at the level of the conveyor of its section and, on the other hand, inside the volume of the enclosure of this same section.

Dans ce dernier cas, vers l'intérieur du volume de l'enceinte, l'expulsion de l'air chauffé en sortie du circuit correspondant s'effectue au travers de rampes. De telles rampes peuvent être constituées par les parois latérales verticales de l'intérieur de l'enceinte de chaque section du four, ou bien sous la forme d'élément indépendant positionnés à l'intérieur de l'enceinte de chaque section.In the latter case, towards the interior of the volume of the enclosure, the expulsion of the heated air at the outlet of the corresponding circuit takes place through ramps. Such ramps can be formed by the vertical side walls of the interior of the enclosure of each section of the oven, or else in the form of an independent element positioned inside the enclosure of each section.

De préférence, au moins deux rampes sont disposées verticalement et parallèlement l'une par rapport à l'autre, s'étendant longitudinalement selon la direction de déplacement des lots, sur une portion de longueur de chaque section. Deux rampes sont espacées transversalement selon un intervalle, d'une part, autorisant le passage des lots entre lesdites deux rampes et, d'autre part, à une distance déterminée par rapport aux parois latérales des lots, afin d'assurer le chauffage et le rétreint.Preferably, at least two ramps are arranged vertically and parallel to each other, extending longitudinally along the direction of movement of the batches, over a length portion of each section. Two ramps are spaced transversely at an interval, on the one hand, allowing the passage of the batches between said two ramps and, on the other hand, at a determined distance with respect to the side walls of the batches, in order to ensure the heating and the narrowed.

Plus avant, chaque rampe présente une forme globalement parallélépipédique rectangle ou trapézoïdale, creuse et fermée. Chaque rampe est connectée à la sortie du circuit par lequel arrive le flux d'air chauffé et présente une paroi avec des orifices par lesquels l'air chaud est expulsé et dirigé vers l'intérieur du volume de sa section. De tels orifices sont généralement identiques, présentant une section circulaire, et sont aussi généralement répartis régulièrement sur la surface de la paroi de chaque rampe.Further forward, each ramp has a generally rectangular or trapezoidal parallelepipedic shape, hollow and closed. Each ramp is connected to the outlet of the circuit through which the flow of heated air arrives and has a wall with orifices through which the hot air is expelled and directed towards the interior of the volume of its section. Such orifices are generally identical, having a circular section, and are also generally evenly distributed over the surface of the wall of each ramp.

A ce titre, généralement, les orifices peuvent être répartis selon des lignes formant des rangées d'orifices alignés horizontalement et des colonnes d'orifices alignés verticalement. Deux rangées adjacentes comprennent des orifices espacés verticalement selon un pas d'une hauteur donnée.As such, generally, the orifices can be distributed along lines forming rows of orifices aligned horizontally and columns of orifices aligned vertically. Two adjacent rows include orifices spaced vertically at a pitch of a given height.

Concernant les rangées, deux orifices adjacents d'une même rangée sont espacés selon un entraxe horizontal d'une longueur déterminée, déterminant les colonnes. En d'autres termes, chacun des orifices d'une rangée est aligné verticalement avec l'orifice correspondant d'une ou des rangées adjacentes, supérieure et/ou inférieure, formant des colonnes selon un maillage régulier.Concerning the rows, two adjacent orifices of the same row are spaced according to a horizontal center distance of a determined length, determining the columns. In other words, each of the orifices of a row is aligned vertically with the corresponding orifice of one or more adjacent rows, upper and/or lower, forming columns according to a regular mesh.

Afin d'améliorer la répartition de l'air expulsé par chaque paroi d'une rampe, selon une autre configuration en quinconce, les orifices de deux rangées adjacentes peuvent être décalés horizontalement. En d'autres termes, une rangée présente des orifices n'appartenant pas aux colonnes des orifices de la ou les rangées adjacentes.In order to improve the distribution of the air expelled by each wall of a ramp, according to another staggered configuration, the orifices of two adjacent rows can be offset horizontally. In other words, a row has orifices that do not belong to the columns of orifices of the adjacent row or rows.

Dans ce contexte, en fonction du format des produits à traiter, il peut être nécessaire d'obturer certaines lignes d'orifices, généralement en fermant les orifices d'une ou plusieurs rangées ou colonnes. Préférentiellement, en fonction de la hauteur des produits à traiter, il peut être nécessaire de fermer les rangées d'orifices situées en partie supérieure d'une rampe ; les orifices situés en partie basse restant alors ouverts.In this context, depending on the format of the products to be treated, it may be necessary to close certain lines of orifices, generally by closing the orifices of one or more rows or columns. Preferably, depending on the height of the products to be treated, it may be necessary to close the rows of orifices located in the upper part of a ramp; the orifices located in the lower part then remain open.

Pour ce faire, de manière connue, une plaque pleine est montée mobile par rapport à la paroi pourvue d'orifices, de manière à venir en vis-à-vis de ces derniers et les refermer. Préférentiellement, une plaque est montée mobile verticalement, sa descente obturant une à une les rangées d'orifices, et inversement.To do this, in known manner, a solid plate is mounted to move relative to the wall provided with orifices, so as to come face to face with the latter and close them. Preferably, a plate is mounted to move vertically, its descent closing the rows of orifices one by one, and vice versa.

Toutefois, en vue d'obturer tous les orifices, la plaque doit présenter une dimension équivalente à la paroi de la rampe : l'amplitude maximale du déplacement d'une seule plaque s'effectue alors selon une course nécessitant un espace correspondant au sein du dispositif, qu'il faut dimensionner en conséquence.However, in order to close all the orifices, the plate must have a dimension equivalent to the wall of the ramp: the maximum amplitude of the displacement of a single plate then takes place according to a stroke requiring a corresponding space within the device, which must be sized accordingly.

Du fait de cette contrainte, la dimension de ladite plaque est limitée, ses déplacements ne permettant simultanément que d'obturer certaines rangées ou colonnes d'orifices. Préférentiellement, la hauteur diminuée de la plaque ne permet que d'obturer que certaines rangées d'orifices, libérant notamment les rangées supérieures si la plaque doit obturer les orifices situés au milieu et en partie basse de la paroi de la rampe.Because of this constraint, the size of said plate is limited, its movements simultaneously only allowing certain rows or columns of orifices to be closed. Preferably, the reduced height of the plate only makes it possible to close certain rows of orifices, in particular freeing up the upper rows if the plate has to close the orifices located in the middle and in the lower part of the wall of the ramp.

Pour permettre l'obturation ligne par ligne des orifices, il est alors nécessaire d'envisager plusieurs plaques mobiles indépendantes, avec les actionneurs correspondants contrôlant leur déplacement, augmentant la complexité, le coût et aussi la masse de chaque rampe.To allow the closing of the orifices line by line, it is then necessary to consider several independent mobile plates, with the corresponding actuators controlling their displacement, increasing the complexity, the cost and also the mass of each ramp.

Une alternative réside dans une plaque pourvue d'ouvertures, réparties selon des alignements correspondants aux lignes d'orifices à obturer. Lesdits ouvertures présentent des dimensions équivalentes à celles des orifices, notamment les mêmes diamètres. Ainsi, en déplaçant la plaque selon une course réduite, équivalente audit diamètre, il est possible d'ouvrir ou d'obturer tous les orifices simultanément.An alternative resides in a plate provided with openings, distributed according to alignments corresponding to the lines of orifices to be closed. Said openings have dimensions equivalent to those of the orifices, in particular the same diameters. Thus, by moving the plate along a reduced stroke, equivalent to said diameter, it is possible to open or close all the orifices simultaneously.

Encore une fois, pour envisager l'obturation sélective de lignes d'orifices, il est nécessaire de multiplier les plaques, induisant les mêmes inconvénients.Once again, to envisage the selective closing of lines of orifices, it is necessary to multiply the plates, inducing the same drawbacks.

Le document CN 207 208 656 U divulgue un dispositif de chauffage de lots de produits enrobés comprenant les caractéristiques du préambule de la revendication 1.The document CN 207 208 656 U discloses a device for heating batches of coated products comprising the features of the preamble of claim 1.

L'invention part de ce constat et a pour but de pallier les inconvénients de l'état de la technique en proposant de pouvoir contrôler l'obturation des lignes successives d'orifices d'une rampe au travers d'au moins une paroi, avec une amplitude maximale de sa course prévue de façon limitée, n'entraînant notamment pas de modification du dimensionnement de l'enceinte du dispositif de chauffage.The invention starts from this observation and aims to overcome the drawbacks of the state of the art by proposing to be able to control the sealing of the successive lines of orifices of a ramp through at least one wall, with a maximum amplitude of its stroke provided in a limited manner, in particular not involving any modification of the dimensioning of the enclosure of the heating device.

Pour ce faire, l'invention envisage de ménager des ouvertures au niveau d'au moins une plaque de moyen d'obturation d'une rampe, lesdites ouvertures ayant notamment un dimensionnement spécifique, en fonction du diamètre des orifices, ainsi que leur entraxe.To do this, the invention envisages providing openings at the level of at least one plate of means for closing off a ramp, said openings having in particular a specific dimensioning, depending on the diameter of the orifices, as well as their center distance.

A cet effet, l'invention a pour objet un dispositif de chauffage de lots de produits enrobés, comprenant au moins :

  • un four pourvu d'au moins une section ;
  • au moins un convoyeur desdits produits enrobés traversant ladite au moins une section ;
  • des moyens de chauffage de ladite au moins une section ;
  • les moyens de chauffage comprenant au moins un bloc de chauffage, au moins un circuit reliant ledit bloc de chauffage et débouchant à l'intérieur de ladite au moins une section, et au moins un moyen de mise en circulation d'un flux d'air chauffé par ledit bloc de chauffage vers ledit circuit ;
  • pour chaque section, chaque moyen de chauffage comprenant au moins une rampe reliée en sortie d'au moins dudit circuit, chaque rampe s'étendant le long d'au moins une partie de ladite section correspondante ;
  • ladite au moins une rampe comprenant au moins une paroi pourvue d'orifices de tailles équivalentes, lesdits orifices étant répartis en lignes sur la surface de ladite paroi, les lignes d'orifices s'étendant horizontalement formant des rangées, les lignes
To this end, the subject of the invention is a device for heating batches of coated products, comprising at least:
  • an oven provided with at least one section;
  • at least one conveyor of said coated products passing through said at least one section;
  • means for heating said at least one section;
  • the heating means comprising at least one heating block, at least one circuit connecting said heating block and opening inside said at least one section, and at least one means for circulating an air flow heated by said heating block to said circuit;
  • for each section, each heating means comprising at least one ramp connected to the output of at least said circuit, each ramp extending along at least part of said corresponding section;
  • said at least one ramp comprising at least one wall provided with orifices of equivalent sizes, said orifices being distributed in lines over the surface of said wall, the lines of orifices extending horizontally forming rows, the lines

d'orifices s'étendant verticalement formant des colonnes, les orifices adjacents d'une même ligne étant espacés selon au moins un entraxe déterminé ;

  • au moins un moyen d'obturation des orifices d'au moins deux lignes comprenant au moins une plaque mobile selon au moins une direction de déplacement par rapport à ladite paroi de ladite rampe, ladite plaque comprenant pour chaque ligne d'orifices des ouvertures espacées selon un intervalle, chaque ouverture présentant une longueur au moins équivalente à la taille d'un orifice.
orifices extending vertically forming columns, the adjacent orifices of the same line being spaced apart according to at least a determined center distance;
  • at least one means for closing off the orifices of at least two rows comprising at least one plate movable in at least one direction of movement relative to said wall of said ramp, said plate comprising for each row of orifices openings spaced along a gap, each opening having a length at least equivalent to the size of an orifice.

Un tel dispositif de chauffage se caractérise en ce que

  • au moins deux ouvertures successives présentent des longueurs différentes, pour passer dans ladite direction de déplacement
    1. a) depuis une position en obturation d'au moins une première ligne d'orifices et en ouverture d'au moins une deuxième ligne d'orifices,
    2. b) vers une autre position en ouverture de ladite première ligne d'orifices tout en conservant en ouverture ladite deuxième ligne d'orifices,
    et inversement.
Such a heating device is characterized in that
  • at least two successive openings have different lengths, to pass in said direction of movement
    1. a) from a closed position of at least a first row of orifices and open of at least a second row of orifices,
    2. b) towards another open position of said first line of orifices while keeping said second line of orifices open,
    and vice versa.

Selon des caractéristiques additionnelles, non limitatives,

  • pour chaque ligne d'orifices, lesdites ouvertures correspondantes peuvent former un alignement selon ladite direction de déplacement de ladite plaque ou transversalement à ladite direction de déplacement de ladite plaque ;
  • lesdites au moins deux ouvertures successives avec des longueurs différentes pouvant appartenir à un même alignement.
According to additional, non-limiting characteristics,
  • for each line of orifices, said corresponding openings can form an alignment along said direction of movement of said plate or transversely to said direction of movement of said plate;
  • said at least two successive openings with different lengths possibly belonging to the same alignment.

L'intervalle entre au moins les ouvertures correspondantes à deux lignes successives d'orifices peut être fonction dudit au moins un entraxe et d'au moins une des tailles d'un orifice desdites deux lignes.The interval between at least the openings corresponding to two successive rows of orifices can be a function of said at least one spacing and of at least one of the sizes of an orifice of said two rows.

Ledit intervalle peut être équivalent audit au moins un entraxe, diminué d'une des tailles d'un orifice d'une desdites deux lignes.Said interval may be equivalent to said at least one center distance, reduced by one of the sizes of an orifice of one of said two lines.

Pour au moins une première ligne et une deuxième ligne successives d'orifices, les ouvertures correspondantes à ladite deuxième ligne peuvent comprendre une longueur équivalente à la longueur des ouvertures correspondantes à ladite première ligne, augmentée au moins d'une des tailles d'un orifice d'une desdites première ligne ou deuxième ligne.For at least a first line and a second successive line of orifices, the openings corresponding to said second line may comprise a length equivalent to the length of the openings corresponding to said first line, increased by at least one of the sizes of an orifice of one of said first line or second line.

Ladite plaque peut être mobile verticalement selon ladite direction de déplacement, chaque alignement des ouvertures correspondant à chaque colonne.Said plate can be movable vertically in said direction of movement, each alignment of the openings corresponding to each column.

Ladite plaque peut être mobile horizontalement selon ladite direction de déplacement, chaque alignement des ouvertures correspondant à chaque rangée.Said plate can be moved horizontally in said direction of movement, each alignment of the openings corresponding to each row.

Ladite plaque peut être mobile horizontalement selon ladite direction de déplacement, chaque alignement des ouvertures correspondant à chaque colonne et en ce que les longueurs des ouvertures s'étendent horizontalement.Said plate can be movable horizontally in said direction of movement, each alignment of the openings corresponding to each column and in that the lengths of the openings extend horizontally.

Les orifices de deux rangées (ou colonnes) adjacentes peuvent être décalés horizontalement (ou verticalement).The holes of two adjacent rows (or columns) can be staggered horizontally (or vertically).

Les ouvertures correspondantes à une des lignes d'orifices peuvent déboucher au travers d'un bord de ladite plaque.The openings corresponding to one of the lines of orifices can emerge through an edge of said plate.

Ladite plaque peut être mobile selon un pas de déplacement au moins équivalent à la taille des orifices.Said plate can be movable according to a displacement pitch at least equivalent to the size of the orifices.

L'intervalle entre les ouvertures d'un même alignement et les longueurs des ouvertures peuvent être adaptés en fonction des entraxes entre les orifices et des tailles des orifices.The interval between the openings of the same alignment and the lengths of the openings can be adapted according to the center distances between the orifices and the sizes of the orifices.

L'invention concerne aussi une installation de conditionnement par fardelage de lots de produits, comprenant successivement au moins :

  • un poste de groupage desdits produits en lots ;
  • un poste d'enrobage de chacun desdits lots par une feuille de film thermorétractable ;
  • un poste de chauffage de chaque feuille enrobant chaque lot ;
  • un poste de refroidissement de la feuille de chaque lot.
The invention also relates to an installation for packaging batches of products by wrapping, successively comprising at least:
  • a grouping station for said products in batches;
  • a station for coating each of said batches with a sheet of heat-shrinkable film;
  • a station for heating each sheet coating each batch;
  • a cooling station for the sheet of each batch.

Une telle installation de conditionnement se caractérise en ce que ledit poste de chauffage comprend au moins un dispositif de chauffage de lots de produits enrobés selon l'invention.Such a conditioning installation is characterized in that said heating station comprises at least one device for heating batches of coated products according to the invention.

Ainsi, au travers d'une course contenue, les ouvertures dédiées de l'invention permettent de successivement libérer ou obturer les lignes d'orifices. L'invention permet notamment d'ouvrir ou de refermer une à une les lignes, colonnes ou rangées, d'orifices.Thus, through a contained race, the dedicated openings of the invention make it possible to successively release or close the lines of orifices. The invention makes it possible in particular to open or close the rows, columns or rows of orifices one by one.

En outre, l'invention permet d'obturer totalement tous les orifices d'une rampe, permettant d'arrêter l'expulsion d'air à l'intérieur de l'enceinte, sans intervenir sur les moyens de chauffage.In addition, the invention makes it possible to completely close all the orifices of a ramp, making it possible to stop the expulsion of air inside the enclosure, without intervening on the heating means.

D'autres caractéristiques et avantages de l'invention ressortiront de la description détaillée qui va suivre des modes de réalisation non limitatifs de l'invention, en référence aux figures annexées, dans lesquelles :

  • La figure 1 représente schématiquement une vue en perspective d'un détail d'un mode de réalisation du dispositif de chauffage selon l'invention, montrant une rampe équipée d'une paroi d'obturation de ses orifices ;
  • La figure 2 représente schématiquement une vue selon une coupe transversale verticale d'une rampe du mode de réalisation visible sur la figure 1 ;
  • La figure 3 représente schématiquement une vue simplifiée de côté d'un premier mode de réalisation, montrant une plaque mobile verticalement dans une première position d'obturation complète de tous les orifices d'une rampe ;
  • La figure 4 représente schématiquement une vue similaire à la figure 3, montrant ladite plaque après un déplacement selon une direction verticale, dans une deuxième position d'obturation, libérant une rangée basse d'orifices ;
  • La figure 5 représente schématiquement une vue similaire à la figure 4, montrant ladite plaque dans une troisième position d'obturation ;
  • La figure 6 représente schématiquement une vue partielle en perspective d'un autre mode de réalisation, montrant une plaque d'obturation mobile selon une direction de déplacement horizontal par rapport à la paroi d'une rampe présentant un décalage de lignes adjacentes d'orifices sous forme de rangées,
  • La figure 7 représente schématiquement une vue simplifiée de côté d'un autre mode de réalisation, montrant une plaque mobile horizontalement dans une première position d'obturation ;
  • La figure 8 représente schématiquement une vue similaire à la figure 7, montrant ladite rampe dans une autre position d'obturation après un déplacement selon une direction horizontale ;
  • La figure 9 représente schématiquement une vue partielle de côté d'un mode de réalisation, montrant une plaque mobile selon une direction verticale, en position d'obturation de tous les orifices d'une rampe, dont les rangées adjacentes d'orifices sont décalées ;
  • La figure 10 représente schématiquement une vue similaire à la figure 9, montrant ladite plaque après un déplacement vertical, dans une deuxième position d'obturation ;
  • La figure 11 représente schématiquement une vue similaire à la figure 10, montrant ladite plaque après un autre déplacement vertical, dans une position de libération de tous les orifices de ladite rampe ; et
  • La figure 12 représente schématiquement une vue partielle d'un mode de réalisation, montrant deux plaque d'obturation des orifices d'une rampe, dans une position d'obturation.
Other characteristics and advantages of the invention will emerge from the detailed description which will follow of the non-limiting embodiments of the invention, with reference to the appended figures, in which:
  • The figure 1 schematically represents a perspective view of a detail of an embodiment of the heating device according to the invention, showing a ramp equipped with a wall closing off its orifices;
  • The figure 2 schematically represents a cross-sectional view vertical of a ramp of the embodiment visible on the figure 1 ;
  • The picture 3 schematically represents a simplified side view of a first embodiment, showing a vertically movable plate in a first position of complete closure of all the orifices of a ramp;
  • The figure 4 schematically represents a view similar to the picture 3 , showing said plate after movement in a vertical direction, in a second closed position, releasing a lower row of orifices;
  • The figure 5 schematically represents a view similar to the figure 4 , showing said plate in a third closed position;
  • The figure 6 schematically represents a partial perspective view of another embodiment, showing a shutter plate movable in a direction of horizontal displacement relative to the wall of a ramp having an offset of adjacent rows of orifices in the form of rows ,
  • The figure 7 schematically represents a simplified side view of another embodiment, showing a horizontally movable plate in a first closed position;
  • The figure 8 schematically represents a view similar to the figure 7 , showing said ramp in another closed position after movement in a horizontal direction;
  • The figure 9 schematically represents a partial side view of an embodiment, showing a plate movable in a vertical direction, in the position of closing all the orifices of a ramp, the adjacent rows of orifices of which are offset;
  • The figure 10 schematically represents a view similar to the figure 9 , showing said plate after a vertical displacement, in a second closed position;
  • The figure 11 schematically represents a view similar to the figure 10 , showing said plate after another vertical movement, in a position for releasing all the orifices of said ramp; and
  • The figure 12 schematically represents a partial view of an embodiment, showing two blanking plates for the orifices of a ramp, in a closed position.

La présente invention concerne le conditionnement de produits au sein d'une ligne de production et de traitement desdits produits.The present invention relates to the packaging of products within a line for the production and processing of said products.

De tels produits peuvent être, de façon non limitative, des récipients, tels des bouteilles, cannettes, briques cartonnées, ou encore de tels récipients à l'unité ou regroupés au sein de boîtes, caisses, cartons ou fardeaux.Such products can be, without limitation, containers, such as bottles, cans, cardboard bricks, or even such containers individually or grouped together in boxes, crates, cartons or bundles.

De manière connue, au sein d'une ligne industrielle, les produits peuvent recevoir plusieurs traitements successifs différents, allant de la fabrication du contenant par une opération d'injection plastique et/ou d'étirage-soufflage, en passant notamment par le remplissage, la fermeture par un bouchon et l'étiquetage des produits à l'unité, jusqu'au conditionnement en lots de plusieurs produits regroupés.In a known manner, within an industrial line, the products can receive several different successive treatments, ranging from the manufacture of the container by a plastic injection and/or stretch-blow molding operation, passing in particular through filling, closure with a cap and labeling of individual products, up to packaging in batches of several grouped products.

En outre, chaque lot est constitué par regroupement, en quinconce ou non, de plusieurs produits selon une disposition en matrice, généralement de forme globalement parallélépipédique carrée ou rectangle. De façon complémentaire, chaque lot peut être maintenu inférieurement au moyen d'un support formant un fond, par exemple une barquette cartonnée.In addition, each batch is formed by grouping together, in staggered rows or not, several products in a matrix arrangement, generally in the overall shape of a square or rectangular parallelepiped. In addition, each batch can be maintained below by means of a support forming a bottom, for example a cardboard tray.

Une fois les produits regroupés en lots, chaque lot peut être enrobé, en particulier recouvert d'un film afin de maintenir les produits ensemble et de faciliter la manutention d'un tel lot.Once the products have been grouped into batches, each batch can be wrapped, in particular covered with a film in order to hold the products together and to facilitate the handling of such a batch.

L'invention vise le conditionnement par fardelage de plusieurs produits regroupés en lots.The invention relates to the packaging by bundling of several products grouped together in batches.

Le fardelage de produits consiste à les regrouper en lots puis à enrober chaque lot de produits au moyen d'une feuille d'un film en matériau thermorétractable. Un lot enrobé subit ensuite une étape de chauffage pour que la feuille vienne épouser la forme globale extérieure du lot.The bundling of products consists in grouping them into batches then in coating each batch of products by means of a sheet of a film of heat-shrinkable material. A coated batch then undergoes a heating step so that the sheet conforms to the overall external shape of the batch.

Cette opération de chauffage s'effectue au moyen d'un dispositif de chauffage de lots de produits enrobés.This heating operation is carried out by means of a device for heating batches of coated products.

Un tel dispositif de chauffage comprend au moins un four, notamment de type tunnel, pourvu d'au moins une section, de préférence plusieurs sections aboutées les unes à la suite des autres, formant une enceinte intérieure. Une telle enceinte s'étend depuis une entrée jusqu'à une sortie.Such a heating device comprises at least one furnace, in particular of the tunnel type, provided with at least one section, preferably several sections abutting one after the other, forming an interior enclosure. Such an enclosure extends from an entrance to an exit.

Le dispositif de chauffage comprend aussi au moins un convoyeur des produits enrobés traversant ladite au moins une section. De préférence, un seul convoyeur traverse toute l'enceinte du four, depuis l'entrée jusqu'à la sortie, s'étendant notamment au-delà en amont de l'entrée et en aval de la sortie. Ledit convoyeur assure en face supérieure le transport des lots de produits enrobés, reposant directement sur leur fond ou indirectement par l'intermédiaire d'un support, comme une barquette ou un carton. Ledit convoyeur transporte alors les produits enrobés selon une direction de convoyage, longitudinale ou sensiblement longitudinale.The heating device also comprises at least one coated product conveyor passing through said at least one section. Preferably, a single conveyor crosses the entire enclosure of the furnace, from the inlet to the outlet, extending in particular beyond upstream of the inlet and downstream of the outlet. Said conveyor ensures, on the upper face, the transport of the batches of coated products, resting directly on their bottom or indirectly by means of a support, such as a tray or a cardboard box. Said conveyor then transports the coated products in a longitudinal or substantially longitudinal conveying direction.

Le dispositif de chauffage comprend encore des moyens de chauffage de ladite au moins une section. De tels moyens de chauffage peuvent être dédiés à une section ou être partagés entre plusieurs sections. Lesdits moyens de chauffage comprennent au moins un bloc de chauffage, au moins un circuit reliant ledit bloc de chauffage et débouchant à l'intérieur de ladite au moins une section, et au moins un moyen de mise en circulation d'un flux d'air chauffé par ledit bloc de chauffage vers ledit circuit. Ainsi, les moyens de chauffage assurent le chauffage de l'air, sa mise en déplacement jusqu'à l'expulser à l'intérieur de l'enceinte du four, au sein d'une ou de plusieurs sections.The heating device further comprises means for heating said au least one section. Such heating means can be dedicated to a section or be shared between several sections. Said heating means comprise at least one heating block, at least one circuit connecting said heating block and opening inside said at least one section, and at least one means for circulating an air flow heated by said heating block to said circuit. Thus, the heating means ensure the heating of the air, its movement until it is expelled inside the enclosure of the oven, within one or more sections.

Plus avant, pour chaque section, chaque moyen de chauffage comprend au moins une rampe 1 reliée en sortie d'au moins dudit circuit. De préférence, chaque moyen de chauffage comprend plusieurs rampes 1, notamment au moins une paire de rampes 1. Une rampe 1 s'étend le long d'au moins une partie de ladite section correspondante et peut donc s'étendre le long d'une ou plusieurs sections.Further, for each section, each heating means comprises at least one ramp 1 connected to the output of at least said circuit. Preferably, each heating means comprises several ramps 1, in particular at least one pair of ramps 1. A ramp 1 extends along at least a part of said corresponding section and can therefore extend along a or more sections.

Une rampe 1 peut être constituée par la paroi du four, s'étendant sur toute ou partie de la hauteur de ladite paroi. Une rampe 1 peut aussi être constituée par un composant indépendant, positionné à l'intérieur de l'enceinte.A ramp 1 can be constituted by the wall of the oven, extending over all or part of the height of said wall. A ramp 1 can also be constituted by an independent component, positioned inside the enclosure.

Chaque rampe 1 s'étend verticalement ou sensiblement verticalement. Plusieurs rampes 1 des mêmes moyens de chauffage, notamment les deux rampes 1 d'une paire, s'étendent parallèlement. Chaque rampe 1 s'étend selon une direction longitudinale, parallèle à la direction de convoyage des produits.Each ramp 1 extends vertically or substantially vertically. Several ramps 1 of the same heating means, in particular the two ramps 1 of a pair, extend parallel. Each ramp 1 extends in a longitudinal direction, parallel to the product conveying direction.

Selon un mode de réalisation, chaque rampe comprend un volume intérieur permettant la circulation de l'air chauffé. Chaque rampe est donc reliée au circuit, assurant la connexion avec son volume intérieur. Cette liaison d'une rampe 1 avec le circuit se situe notamment en partie haute. Ledit volume d'une rampe est notamment visible sur la figure 2.According to one embodiment, each ramp comprises an interior volume allowing the circulation of heated air. Each ramp is therefore connected to the circuit, ensuring the connection with its interior volume. This connection of a ramp 1 with the circuit is located in particular in the upper part. Said volume of a ramp is notably visible on the picture 2 .

De plus, ladite au moins une rampe 1 comprend au moins une paroi pourvue d'orifices 2. Entre les orifices 2 la paroi est donc pleine, sauf éventuellement de certaines parties ajourées pour des considérations structurelles de mobilité ou de fixation.In addition, said at least one ramp 1 comprises at least one wall provided with orifices 2. Between the orifices 2 the wall is therefore solid, except possibly for certain perforated parts for structural considerations of mobility or fixing.

Dans le cas d'une rampe 1 intégrée dans une paroi du four, c'est alors cette paroi qui est pourvue d'orifices 2. Dans le cas d'une rampe 1 indépendante, comme notamment visible sur la figure 2, elle peut comprendre deux parois latérales, parallèles ou sensiblement parallèles : l'une et/ou l'autre desdites parois latérales pouvant être pourvues desdits orifices 2. Préférentiellement, une rampe 4 indépendante peut présenter une forme globalement parallélépipédique rectangle, voire prismatique à face tronconique. Une rampe 4 peut être fermée par ses parois périphériques, de manière à définir un volume intérieur.In the case of a ramp 1 integrated into a wall of the furnace, it is then this wall which is provided with orifices 2. In the case of an independent ramp 1, as can be seen in particular on the picture 2 , it can comprise two side walls, parallel or substantially parallel: one and/or the other of said side walls can be provided with said orifices 2. tapered face. A ramp 4 can be closed by its peripheral walls, so as to define an interior volume.

Les orifices 2 sont prévus traversant, communiquant entre le volume intérieur de chaque rampe 1 et l'intérieur de l'enceinte. Ainsi, l'air arrivant depuis le circuit circule à l'intérieur dudit volume de chaque rampe 4 et est expulsé à l'intérieur de l'enceinte par l'intermédiaire desdits orifices 2.The orifices 2 are provided crossing, communicating between the interior volume of each ramp 1 and the interior of the enclosure. Thus, the air arriving from the circuit circulates inside said volume of each ramp 4 and is expelled inside the enclosure via said orifices 2.

De tels orifices 2 peuvent être de tailles équivalentes, notamment à plus ou moins quelques millimètres près. Les orifices 2 sont généralement de forme circulaire, mais peuvent être oblongs ou de forme polygonale, à bords arrondis ou droits. Dès lors, la taille d'un orifice 2 correspond à sa plus grande dimension, notamment son diamètre. Préférentiellement, la taille des orifices 2 peut être comprise entre 2 et 20 millimètres (mm), la taille de chaque orifice 2 étant notamment de 5 mm.Such orifices 2 can be of equivalent sizes, in particular to within more or less a few millimeters. The orifices 2 are generally circular in shape, but can be oblong or polygonal in shape, with rounded or straight edges. Therefore, the size of an orifice 2 corresponds to its largest dimension, in particular its diameter. Preferably, the size of the orifices 2 can be between 2 and 20 millimeters (mm), the size of each orifice 2 being in particular 5 mm.

Lesdits orifices 2 sont répartis en lignes sur la surface de ladite paroi de ladite au moins une rampe 1. Préférentiellement, les orifices 2 sont répartis régulièrement sur la paroi correspondante, mais peuvent aussi être répartis de façon irrégulière. Une répartition régulière consiste notamment en une distance équivalente, à quelques millimètres près, des orifices 2 de lignes différentes, par rangée ou colonne.Said orifices 2 are distributed in lines on the surface of said wall of said at least one ramp 1. Preferably, the orifices 2 are distributed regularly on the corresponding wall, but can also be distributed irregularly. A regular distribution consists in particular of an equivalent distance, to within a few millimeters, of the orifices 2 of different rows, per row or column.

En outre, les lignes d'orifices 2 s'étendant horizontalement forment des rangées, tandis que les lignes d'orifices 2 s'étendant verticalement forment des colonnes. Les orifices 2 adjacents d'une même ligne sont espacés selon au moins un entraxe déterminé. En somme, les orifices 2 d'une même rangée sont espacés horizontalement d'un entraxe donné, tandis que les orifices 2 d'une même colonne sont espacés verticalement d'un autre entraxe donné, ces deux entraxes pouvant être équivalents ou différents. On notera qu'au sein d'une même ligne, rangée et/ou colonne, les orifices 2 peuvent être espacés d'entraxes équivalents ou différents.Further, the rows of holes 2 extending horizontally form rows, while the rows of holes 2 extending vertically form columns. The adjacent orifices 2 of the same line are spaced apart according to at least a determined center distance. In short, the orifices 2 of the same row are spaced horizontally by a given center distance, while the orifices 2 of the same column are spaced vertically by another given center distance, these two center distances possibly being equivalent or different. It will be noted that within the same line, row and/or column, the orifices 2 can be spaced apart at equivalent or different spacings.

En particulier, les orifices 2 peuvent former une matrice rectangulaire, les rangées et colonnes étant perpendiculaires entre elles.In particular, the orifices 2 can form a rectangular matrix, the rows and columns being mutually perpendicular.

Par ailleurs, deux lignes successives, notamment deux rangées l'une au-dessus de l'autre, peuvent être situées dans un même alignement, comme notamment visible sur les figures 3 à 5, ou bien l'une peut être décalée horizontalement par rapport à l'autre, comme notamment visible sur la figure 11. En somme, les orifices 2 de deux rangées (ou colonnes) adjacentes sont décalés horizontalement (ou verticalement).Furthermore, two successive lines, in particular two rows one above the other, can be located in the same alignment, as can be seen in particular on the figures 3 to 5 , or else one can be shifted horizontally with respect to the other, as can be seen in particular on the figure 11 . In short, the orifices 2 of two adjacent rows (or columns) are offset horizontally (or vertically).

Le dispositif de chauffage comprend au moins un moyen d'obturation 3 des orifices 2 d'au moins deux lignes. Un tel moyen d'obturation comprend au moins une plaque 4. Ladite plaque 4 est positionnée à proximité de la paroi pourvue d'orifices 2 de la rampe 1, de préférence accolée et au contact.The heating device comprises at least one means 3 for closing the orifices 2 of at least two lines. Such closure means comprises at least one plate 4. Said plate 4 is positioned close to the wall provided with orifices 2 of the ramp 1, preferably side by side and in contact.

Ladite plaque 4 peut être située à l'intérieur mais préférentiellement à l'extérieur de ladite rampe 1.Said plate 4 can be located inside but preferably outside of said ramp 1.

La plaque 4 est prévue mobile selon au moins une direction de déplacement par rapport à ladite paroi de ladite rampe 1. Ce déplacement est préférentiellement une translation. Selon un mode de réalisation, comme visible sur les figures 3 à 5, ladite plaque 4 est mobile selon une direction verticale. Selon un autre mode de réalisation, comme visible sur les figures 7 et 8, ladite plaque 4 est mobile selon une direction horizontale. Dans le cas d'une plaque 4 positionnée contre la paroi de la rampe 1, le déplacement s'effectue par glissement de l'une contre l'autre. Avec un tel contact en glissement, l'air traversant les orifices 2 peut ne pas ou peu circuler entre la paroi et la plaque 4.The plate 4 is provided to move along at least one direction of movement relative to said wall of said ramp 1. This movement is preferably a translation. According to one embodiment, as visible on the figures 3 to 5 , said plate 4 is movable in a vertical direction. According to another embodiment, as visible on the figures 7 and 8 , said plate 4 is movable in a horizontal direction. In the case of a plate 4 positioned against the wall of the ramp 1, the movement takes place by sliding one against the other. With such a sliding contact, the air passing through the orifices 2 may not or barely circulate between the wall and the plate 4.

Ainsi, il est possible de déplacer la plaque 4 selon une direction horizontale ou verticale, ou bien alternativement verticalement ou horizontalement, ou encore de façon combinée avec une composante horizontale et une composante verticale contribuant à un déplacement incliné ou en biais.Thus, it is possible to move the plate 4 in a horizontal or vertical direction, or alternately vertically or horizontally, or even in a combined manner with a horizontal component and a vertical component contributing to an inclined or oblique movement.

Selon un mode de réalisation, les moyens d'obturation 3 comprennent une plaque 4 par paroi pourvu d'orifices 2 d'une rampe 1. Selon un autre mode de réalisation, les moyens d'obturation 3 comprennent plusieurs plaques 4 juxtaposées, notamment verticalement comme visible sur la figure 12 ; plusieurs plaques 4 permettent de notamment diminuer la course de chacune d'entre elles et de contrôler leur déplacement indépendamment.According to one embodiment, the closure means 3 comprise a plate 4 per wall provided with orifices 2 of a ramp 1. According to another embodiment, the closure means 3 comprise several plates 4 juxtaposed, in particular vertically as seen on the figure 12 ; several plates 4 make it possible in particular to reduce the stroke of each of them and to control their movement independently.

En outre, les moyens d'obturation 3 peuvent comprendre des moyens de guidage 5 de ladite plaque 4 par rapport à ladite paroi. Comme visible sur le mode de réalisation de la figure 6, lesdits moyens de guidage 5 peuvent comprendre au moins un trou oblong ou allongé, notamment rectiligne, ménagé au travers de ladite plaque 4, chaque trou étant traversé par un ergot fixe par rapport à ladite paroi ; le déplacement de la plaque 4 suit alors la restriction de la forme dudit trou, l'ergot coulissant à l'intérieur du trou depuis l'une jusqu'à l'autre de ses extrémités. Selon d'autres modes de réalisations, non représentés, ladite plaque 4 peut être montée sur des rails de guidage, notamment situés en bordure de la paroi correspondante de la rampe 1.In addition, the closure means 3 may comprise means 5 for guiding said plate 4 with respect to said wall. As visible on the embodiment of the figure 6 , said guide means 5 may comprise at least one oblong or elongated hole, in particular rectilinear, provided through said plate 4, each hole being traversed by a lug fixed with respect to said wall; the movement of the plate 4 then follows the restriction of the shape of said hole, the lug sliding inside the hole from one to the other of its ends. According to other embodiments, not shown, said plate 4 can be mounted on guide rails, in particular located at the edge of the corresponding wall of ramp 1.

Le déplacement de ladite plaque 4 peut être effectué par l'intermédiaire d'actionneurs spécifiques, notamment positionnés latéralement ou en partie supérieure de ladite rampe 1. En outre, un même actionneur peut contrôler simultanément le déplacement d'une ou plusieurs plaques 4, en particulier de deux plaques situées de part et d'autre des deux parois latérales d'une même plaque 4.The movement of said plate 4 can be carried out by means of specific actuators, in particular positioned laterally or in the upper part of said ramp 1. In addition, the same actuator can simultaneously control the movement of one or more plates 4, by particular of two plates located on either side of the two side walls of the same plate 4.

Plus avant, ladite plaque 4 comprend pour chaque ligne d'orifices 2 des ouvertures 6 espacées selon un intervalle.Further on, said plate 4 comprises for each line of orifices 2 openings 6 spaced at an interval.

Chaque ouverture 6 présente une longueur au moins équivalente à la taille d'un orifice 2. En somme, une ouverture 6 peut présenter une de ses dimensions légèrement inférieure, mais préférentiellement au moins supérieure à la taille d'un orifice 2 correspondant.Each opening 6 has a length at least equivalent to the size of an orifice 2. In sum, an opening 6 may have one of its dimensions slightly smaller, but preferably at least greater than the size of a corresponding orifice 2.

A ce titre, les ouvertures 6 sont réparties sensiblement selon la même configuration que la répartition des orifices 2 de la paroi correspondante.As such, the openings 6 are distributed substantially according to the same configuration as the distribution of the orifices 2 of the corresponding wall.

Ainsi, un déplacement dans un sens de la plaque 4 permet de positionner les ouvertures 6 en vis-à-vis des orifices 2 correspondant, laissant passer l'air au travers desdits orifices 2 et desdites ouvertures 6 alors alignées. Un déplacement en sens inverse permet d'obturer les orifices 2, le matériau de la plaque 4 situé d'un côté d'une ouverture 6 venant alors boucher l'orifice 2 correspondant.Thus, a movement in one direction of the plate 4 makes it possible to position the openings 6 opposite the corresponding openings 2, allowing air to pass through said openings 2 and said openings 6 then aligned. A movement in the opposite direction makes it possible to close the orifices 2, the material of the plate 4 located on one side of an opening 6 then coming to block the corresponding orifice 2.

Préférentiellement, pour chaque ligne d'orifices 2, lesdites ouvertures 6 correspondantes forment un alignement selon ladite direction de déplacement de ladite plaque 4 ou transversalement à ladite direction de déplacement de ladite plaque 4.Preferably, for each row of orifices 2, said corresponding openings 6 form an alignment along said direction of movement of said plate 4 or transversely to said direction of movement of said plate 4.

Selon un mode de réalisation, ladite plaque 4 est mobile verticalement selon ladite direction de déplacement, chaque alignement des ouvertures 6 correspond alors à chaque colonne, comme visible notamment sur les figures 3 à 5. Selon un autre mode de réalisation, comme visible sur les figures 7 et 8, ladite plaque 4 est mobile horizontalement selon ladite direction de déplacement, chaque alignement des ouvertures 6 correspondant à chaque rangée.According to one embodiment, said plate 4 is vertically movable in said direction of movement, each alignment of openings 6 then corresponds to each column, as visible in particular on the figures 3 to 5 . According to another embodiment, as visible on the figures 7 and 8 , said plate 4 is movable horizontally in said direction of movement, each alignment of openings 6 corresponding to each row.

Avantageusement, l'invention prévoit de permettre l'obturation d'au moins une ligne d'orifices 2, de préférence chaque ligne une par une. De plus, l'invention prévoit de limiter la course en déplacement de ladite plaque 4 lors du passage depuis une position d'ouverture d'une ligne vers une position d'obturation de cette même ligne, et inversement. Dès lors, le passage vers l'ouverture ou vers l'obturation de toutes les lignes induit aussi une course réduite.Advantageously, the invention provides for allowing the closing of at least one line of orifices 2, preferably each line one by one. In addition, the invention provides for limiting the displacement stroke of said plate 4 during passage from an open position of a line to a closed position of this same line, and vice versa. Consequently, the passage towards the opening or towards the closing of all the lines also induces a reduced stroke.

Pour ce faire, au moins deux ouvertures 6 successives présentent des longueurs différentes, pour passer dans ladite direction de déplacement :

  1. a) depuis une position en obturation d'au moins une première ligne d'orifices 2 et en ouverture d'au moins une deuxième ligne d'orifices 2,
  2. b) vers une autre position en ouverture de ladite première ligne d'orifices 2 tout en conservant en ouverture ladite deuxième ligne d'orifices 2.
To do this, at least two successive openings 6 have different lengths, to pass in said direction of movement:
  1. a) from a closed position of at least a first line of orifices 2 and in the opening of at least a second line of orifices 2,
  2. b) to another opening position of said first line of orifices 2 while keeping said second row of orifices 2 open.

Inversement, le passage dans la direction de déplacement en sens inverse, permet de passer depuis la position en ouverture desdites première ligne et deuxième ligne, vers une position en obturation de ladite première ligne tout en conservant ouverts les orifices de ladite deuxième ligne.Conversely, passage in the direction of movement in the opposite direction makes it possible to pass from the open position of said first line and second line, to a closed position of said first line while keeping the orifices of said second line open.

Selon un mode de réalisation préférentiel, comme évoqué précédemment, pour chaque ligne d'orifices 2, lesdites ouvertures 6 correspondantes forment un alignement selon ladite direction de déplacement de ladite plaque 4 ou bien transversalement à ladite direction de déplacement de ladite plaque 4. Dès lors, lesdites au moins deux ouvertures 6 successives avec des longueurs différentes appartiennent à un même alignement.According to a preferred embodiment, as mentioned previously, for each line of orifices 2, said corresponding openings 6 form an alignment along said direction of movement of said plate 4 or else transversely to said direction of movement of said plate 4. Therefore , said at least two successive openings 6 with different lengths belong to the same alignment.

Comme visible sur le mode de réalisation des figures 3 à 5, la plaque 4 est mobile verticalement et les ouvertures 6 forment un alignement par colonne selon ladite direction de déplacement vertical. Ainsi, la première rangée d'ouvertures 6 située supérieurement présente une dimension orientée verticalement plus petite que la dimension de la deuxième rangée d'ouvertures 6 située inférieurement.As visible on the embodiment of the figures 3 to 5 , the plate 4 is vertically movable and the openings 6 form an alignment by column according to said direction of vertical movement. Thus, the first row of openings 6 located above has a dimension oriented vertically smaller than the dimension of the second row of openings 6 located below.

Selon le mode de réalisation visible sur les figures 7 et 8, la plaque 4 est mobile horizontalement et les ouvertures 6 forment un alignement par rangée selon ladite direction de déplacement horizontal. Ainsi, la première rangée d'ouvertures situées supérieurement présente une dimension plus petite que la dimension des ouvertures 6 de la deuxième rangée située en dessous, qui elle-même présente une dimension d'ouvertures 6 plus petite que la dimension des ouvertures 6 de la dernière rangée située inférieurement.According to the embodiment visible on the figures 7 and 8 , the plate 4 is movable horizontally and the openings 6 form an alignment by row according to said direction of horizontal displacement. Thus, the first row of openings located above has a smaller dimension than the dimension of the openings 6 of the second row located below, which itself has a dimension of openings 6 smaller than the dimension of the openings 6 of the last row below.

Préférentiellement, l'intervalle entre au moins les ouvertures 6 correspondantes à deux lignes successives d'orifices est fonction dudit au moins un entraxe et d'au moins une des tailles d'un orifices 2 desdites deux lignes.Preferably, the interval between at least the openings 6 corresponding to two successive lines of orifices is a function of said at least one spacing and of at least one of the sizes of an orifice 2 of said two lines.

En particulier, ledit intervalle peut être équivalent audit au moins un entraxe, diminué d'une des tailles d'un orifice 2 d'une desdites deux lignes.In particular, said interval may be equivalent to said at least one center distance, reduced by one of the sizes of an orifice 2 of one of said two lines.

Selon le mode de réalisation préféré, pour au moins une première ligne et une deuxième ligne successives d'orifices 2, les ouvertures 6 correspondantes à ladite deuxième ligne comprennent une longueur équivalente à la longueur des ouvertures correspondantes à ladite première ligne, augmentée au moins d'une des tailles d'un orifice 2 d'une desdites première ligne ou deuxième ligne. En particulier, pour une première ligne ayant une taille d'ouvertures 6 équivalente à la taille des orifices 2 correspondants, alors la deuxième ligne d'ouvertures 6 peut présenter des dimensions équivalentes à deux fois les dimensions desdits orifices 2.According to the preferred embodiment, for at least a first line and a second successive line of orifices 2, the openings 6 corresponding to said second line comprise a length equivalent to the length of the openings corresponding to said first line, increased by at least d one of the sizes of an orifice 2 of one of said first line or second line. In particular, for a first line having a size of openings 6 equivalent to the size of the orifices 2 corresponding, then the second row of openings 6 may have dimensions equivalent to twice the dimensions of said orifices 2.

En outre, dans le cadre de la présente invention, il est possible d'adapter les différentes dimensions, en particulier la longueur des ouvertures 6 et l'entraxe entre les ouvertures 6, de quelques millimètres (mm), notamment à plus ou moins 1 à 5 mm. Cette adaptation permet d'offrir une tolérance dans les positions possibles d'arrêts lors des déplacements de la plaque 4, facilitant l'ouverture ou l'obturation d'un ou plusieurs orifices 2. Une telle tolérance assure totalement l'ouverture d'au moins une ligne souhaitée alors qu'une ou plusieurs autres restent entièrement fermées, et inversement.In addition, in the context of the present invention, it is possible to adapt the different dimensions, in particular the length of the openings 6 and the center distance between the openings 6, from a few millimeters (mm), in particular to more or less 1 at 5mm. This adaptation makes it possible to offer a tolerance in the possible stopping positions during the movements of the plate 4, facilitating the opening or closing of one or more orifices 2. Such a tolerance fully ensures the opening of at least least one desired row while one or more others remain fully closed, and vice versa.

Selon un autre mode de réalisation ; ladite plaque 4 est mobile horizontalement selon ladite direction de déplacement, chaque alignement des ouvertures 6 correspondant à chaque colonne et en ce que les longueurs des ouvertures 6 s'étendent horizontalement.According to another embodiment; said plate 4 is movable horizontally in said direction of movement, each alignment of openings 6 corresponding to each column and in that the lengths of openings 6 extend horizontally.

Comme visible sur les modes de réalisations des figures 9 à 12, les ouvertures 6 correspondantes à une des lignes d'orifices 2 débouches au travers d'un bord de ladite au moins une plaque 4.As visible on the embodiments of the figures 9 to 12 , the openings 6 corresponding to one of the lines of orifices 2 open out through an edge of said at least one plate 4.

Dès lors, en déplacement la plaque 4 d'un pas, il est possible d'ouvrir ou fermer les lignes d'orifices 2 une par une. Préférentiellement, ladite plaque 4 est mobile selon un pas de déplacement au moins équivalent audit taille des orifices 2.Consequently, by moving the plate 4 by one step, it is possible to open or close the lines of orifices 2 one by one. Preferably, said plate 4 is movable according to a displacement step at least equivalent to said size of the orifices 2.

Bien entendu, en fonction de la configuration, l'invention peut prévoir que l'intervalle entre les ouvertures 6 d'un même alignement et les longueurs des ouvertures 6 sont adaptés en fonction des entraxes entre les orifices 2 et des tailles des orifices 2, afin de s'y adapter et de permettre l'ouverture et l'obturation d'une ligne par déplacement de la plaque 4 selon son pas de déplacement.Of course, depending on the configuration, the invention can provide that the interval between the openings 6 of the same alignment and the lengths of the openings 6 are adapted according to the center distances between the orifices 2 and the sizes of the orifices 2, in order to adapt to it and to allow the opening and closing of a line by displacement of the plate 4 according to its displacement pitch.

On notera qu'il est alors possible d'ouvrir ou de fermer plusieurs orifices 2 en déplaçant la plaque 4 d'autant de pas. Dès lors, la plaque 4 peut passer en plusieurs positions intermédiaires, chaque position ouvre ou ferme une ligne (colonne ou rangée) d'orifices 2.It will be noted that it is then possible to open or close several orifices 2 by moving the plate 4 by as many steps. Therefore, the plate 4 can pass through several intermediate positions, each position opens or closes a line (column or row) of orifices 2.

Avec la configuration spécifique des ouvertures 6 de la plaque 4, l'amplitude de course correspond alors à la somme des tailles de ses orifices 2, par ligne.With the specific configuration of the openings 6 of the plate 4, the stroke amplitude then corresponds to the sum of the sizes of its orifices 2, per line.

L'invention concerne aussi une installation de conditionnement par fardelage de lots de produits, comprenant successivement au moins :

  • un poste de groupage desdits produits en lots ;
  • un poste d'enrobage de chacun desdits lots par une feuille de film thermorétractable ;
  • un poste de chauffage de chaque feuille enrobant chaque lot ;
  • un poste de refroidissement de la feuille de chaque lot.
The invention also relates to an installation for packaging batches of products by wrapping, successively comprising at least:
  • a grouping station for said products in batches;
  • a station for coating each of said batches with a sheet of heat-shrinkable film;
  • a station for heating each sheet coating each batch;
  • a cooling station for the sheet of each batch.

Avantageusement, ladite installation comprend au moins un dispositif de chauffage de lots de produits enrobés tel que précédemment décrit.Advantageously, said installation comprises at least one device for heating batches of coated products as previously described.

Claims (13)

  1. Device for heating wrapped batches of products, comprising at least:
    - an oven provided with at least one section;
    - at least one conveyor for said wrapped products passing through said at least one section;
    - means for heating said at least one section;
    - the heating means comprising at least one heating unit, at least one circuit connecting said heating unit and discharging inside said at least one section, and at least one means for causing a flow of air heated by said heating unit to circulate towards said circuit;
    - for each section, each heating means comprising at least one manifold (1) connected at the outlet of at least said circuit, each manifold (1) extending along at least a part of said corresponding section;
    - said at least one manifold (1) comprising at least one wall provided with orifices (2) of equivalent sizes, said orifices (2) being distributed in lines on the surface of said wall, the horizontally extending lines of orifices (2) forming rows, the vertically extending lines of orifices (2) forming columns, the adjacent orifices (2) of one and the same line being spaced apart by at least one determined centre-to-centre spacing;
    - at least one means (3) for blocking the orifices (2) of at least two lines comprising at least one plate (4) that is able to be moved in at least one direction of movement relative to said wall of said manifold (1), said plate (4) comprising, for each line of orifices (2), openings (6) spaced apart by an interval, each opening (6) having a length at least equivalent to the size of an orifice (2) ;
    characterized in that
    - at least two successive openings (6) have different lengths, to go in said direction of movement
    a) from a position blocking at least a first line of orifices (2) and opening at least a second line of orifices (2),
    b) to another position opening said first line of orifices (2) whilst keeping said second line of orifices (2) open,
    and vice versa.
  2. Heating device according to Claim 1, characterized in that:
    - for each line of orifices (2), said corresponding openings (6) form an alignment in said direction of movement of said plate (4) or transversely to said direction of movement of said plate (4);
    - said at least two successive openings (6) with different lengths belong to one and the same alignment.
  3. Heating device according to either one of the preceding claims, characterized in that the interval between at least the openings (6) that correspond to two successive lines of orifices (2) is a function of said at least one centre-to-centre spacing and at least one of the sizes of an orifice (2) of said two lines.
  4. Heating device according to Claim 3, characterized in that said interval is equivalent to said at least one centre-to-centre spacing, reduced by one of the sizes of an orifice (2) of one of said two lines.
  5. Heating device according to any one of the preceding claims, characterized in that for at least a first and a second successive line of orifices (2), the openings (6) that correspond to said second line have a length equivalent to the length of the openings (6) that correspond to said first line, increased at least by one of the sizes of an orifice (2) of one from among said first line and second line.
  6. Heating device according to one of Claims 1 to 5, characterized in that said plate (4) is able to be moved vertically in said direction of movement, each alignment of openings (6) corresponding to each column.
  7. Heating device according to one of Claims 1 to 5, characterized in that said plate (4) is able to be moved horizontally in said direction of movement, each alignment of openings (6) corresponding to each row.
  8. Heating device according to one of Claims 1 to 5, characterized in that said plate (4) is able to be moved horizontally in said direction of movement, each alignment of openings (6) corresponding to each column, and in that the lengths of the openings (6) extend horizontally.
  9. Heating device according to any one of the preceding claims, characterized in that the orifices (2) of two adjacent rows (or columns) are offset horizontally (or vertically).
  10. Heating device according to any one of the preceding claims, characterized in that the openings (6) that correspond to one of the lines of orifices (2) discharge through an edge of said plate (4).
  11. Heating device according to any one of the preceding claims, characterized in that said plate (4) is able to be moved by a movement step at least equivalent to the size of the orifices (2).
  12. Heating device according to any one of Claims 2 to 11, characterized in that the interval between the openings (6) of one and the same alignment and the lengths of the openings (6) are adapted as a function of the centre-to-centre spacings between the orifices (2) and the sizes of the orifices (2).
  13. Installation for packaging by film wrapping batches of products, comprising successively at least:
    - a station for grouping said products into batches;
    - a station for wrapping each of said batches using a sheet of heat-shrink film;
    - a station for heating each sheet wrapping each batch;
    - a station for cooling the sheet of each batch; characterized in that said heating station comprises at least one device for heating wrapped batches of products according to any one of the preceding claims.
EP20169396.7A 2019-04-02 2020-04-14 Device for heating batches of coated products and installation for packaging by bundling of product batches Active EP3718910B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1903487A FR3094779B1 (en) 2019-04-02 2019-04-02 Device for heating batches of coated products and packaging installation by bundling batches of products

Publications (2)

Publication Number Publication Date
EP3718910A1 EP3718910A1 (en) 2020-10-07
EP3718910B1 true EP3718910B1 (en) 2022-03-30

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US (1) US11407546B2 (en)
EP (1) EP3718910B1 (en)
CN (1) CN111792118B (en)
FR (1) FR3094779B1 (en)
HU (1) HUE059017T2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021108138A1 (en) * 2021-03-31 2022-10-06 Krones Aktiengesellschaft Method for switching a shrinking device into a stand-by mode and shrinking device
CN113391595B (en) * 2021-06-03 2022-10-04 长春电子科技学院 PLC system for major engineering intelligent control

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Also Published As

Publication number Publication date
FR3094779B1 (en) 2021-05-14
EP3718910A1 (en) 2020-10-07
US11407546B2 (en) 2022-08-09
CN111792118A (en) 2020-10-20
FR3094779A1 (en) 2020-10-09
CN111792118B (en) 2023-06-27
US20200317381A1 (en) 2020-10-08
HUE059017T2 (en) 2022-09-28

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