EP0814022A1 - Machine for packaging groups of objects - Google Patents

Machine for packaging groups of objects Download PDF

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Publication number
EP0814022A1
EP0814022A1 EP96401366A EP96401366A EP0814022A1 EP 0814022 A1 EP0814022 A1 EP 0814022A1 EP 96401366 A EP96401366 A EP 96401366A EP 96401366 A EP96401366 A EP 96401366A EP 0814022 A1 EP0814022 A1 EP 0814022A1
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EP
European Patent Office
Prior art keywords
film
tube
products
batch
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.)
Withdrawn
Application number
EP96401366A
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German (de)
French (fr)
Inventor
Robert Perot
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Individual
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Individual
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Publication date
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Priority to EP96401366A priority Critical patent/EP0814022A1/en
Publication of EP0814022A1 publication Critical patent/EP0814022A1/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/06—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
    • B65B9/073—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it the web having intermittent motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/06—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
    • B65B2009/063—Forming shoulders

Definitions

  • the present invention relates to a machine for packaging batches of products, particularly suitable for the automatic packaging of bakery products, such as baguette dough bundles or other pieces of bread, or any other product of elongated shape.
  • These bread dough pieces are generally delivered in the form of lots packed in a plastic envelope so as to protect them during their transport.
  • Such machines include a device for forming a film of packaging material into a tube with longitudinal joint by relative displacement of the film and the forming device, a product batch conveyor longitudinally movable between a retracted position for receiving a batch of products in which the conveyor is located upstream of the forming device, considering the direction of movement of the batches of products, and a position of engagement of a batch of products in the tube and of the cutting and tube closure arranged at the outlet of the tube forming device and adapted to separate the tube from the film coming from a supply reel from which it is formed and respectively close the rear end of a formed tube containing the batch of products and the anterior end of a forming tube.
  • a packaging machine for example, using two reels for feeding a film of material.
  • packaging in which the film forming device conforms each of the films taken from a corresponding reel into a half-tube.
  • the two half-tubes are joined by means of two opposite longitudinal welds to form a tube in which a batch of bread dough pieces is engaged.
  • this type of known packaging machine does not make it possible to pack a burden composed of a relatively large number of bread dough pieces due to the relative fragility of the tube of packaging material.
  • Another type of known packaging machine uses a single reel for supplying a film of packaging material arranged transversely to the path of the conveyor of batches of products.
  • the film is laid longitudinally around the film forming device which ensures the longitudinal welding of the opposite edges of the film.
  • Two traction rollers disposed at the outlet of the film forming device come into engagement with the longitudinal joint of the tube so as to advance the film in the forming device to constitute the tube.
  • This packaging machine also does not make it possible to pack a burden consisting of numerous loaves of bread, the film pulled tending to tear due to the resistance generated by the weight of the products engaged in the tube.
  • the invention aims to overcome the aforementioned drawbacks, by proposing a packaging machine making it possible to package a batch consisting of a large number of products, while using a film of particularly thin packaging material.
  • a machine for packaging batches each formed of at least one product, in particular at least one bakery product, by means of a film of packaging material taken continuously from a supply reel comprising a device for forming the film into a tube with longitudinal joint by relative displacement of the film and the forming device, a product batch conveyor longitudinally movable between a retracted position for receiving a batch of products in which the conveyor is located upstream of the forming device, considering the direction of movement of the batch of products, and a position of engagement of a batch of products in the tube and means for cutting and closing the tube arranged in exit from the film forming device and adapted to separate the tube from the film coming from the supply reel from which it is formed and close the rear end of a formed tube containing the batch of products and the front end respectively of a tube in formation, characterized in that the product batch conveyor comprises a piston for driving the batch of products contained in said transport tor and, via said batch, from the closed anterior end of the tube in formation, for driving the film with respect to the forming device
  • the film forming device comprises a film former forming a tunnel through which the product batch conveyor is movable and around which the film of packaging material passes, the closed anterior end of the tube in formation sealing the front end of the former and a junction plate disposed under the former and provided with slots for joining the opposite longitudinal edges of the film during the formation of the tube, said slots converging towards the front of the former in the direction of movement of batches of products.
  • the joining plate comprises two longitudinal film guide parts arranged side by side and each provided with an oblique cutout, said cutouts converging towards the front of the former and a triangular film holding plate cooperating with the edge of each cutout to form said slots for joining the edges of the film.
  • each of the film guide pieces has at its end opposite the oblique cut an opening for the passage of a corresponding film edge for its superposition with the other edge, a welding tip being disposed at said openings.
  • the opening for passage of a film edge of at least one of the film guide parts has a bent transverse slot in order to center a corresponding edge relative to the axis of the film joining plate.
  • the product batch conveyor comprises an elongated loading tray with U-shaped section open upwards and intended for the successive reception of the batches of products to be packaged and means for longitudinal displacement of the plate between said reception positions. and engaging a batch of products in the tube.
  • the product batch conveyor comprises a pusher movable axially and integrally with the loading plate in the direction of movement in the tube, said pusher and said plate being separable during the movement of withdrawal of said plate between said positions of engagement and reception in order to ensure immobilization of said pusher so as to axially maintain the products in the tube during said movement of withdrawal of the plate.
  • the machine comprises a member for detecting the position of the pusher adapted to cause the action of the tube cutting and closing means during the movement of withdrawal of said pusher between said position of engagement in the tube and said position. receiving lots.
  • the machine comprises a set of guide and film conveying rollers towards the forming device, and the reel for supplying the film of packaging material carries a film longitudinally folded at 180 °, the width of which is substantially equal to the perimeter of the forming device, said supply reel and said guide and conveying rollers being arranged substantially parallel to the direction of movement of the batches of products.
  • the film of packaging material is a polyethylene film 35 to 100 microns thick, or a composite film of polyethylene and polyester, said film having a thickness of 19 to 35 microns.
  • FIG. 1 shows a machine for packaging a batch of products, which has the reference numeral 10.
  • This machine 10 is intended to package a batch of dough for bread sticks 12 in a film 14 of packaging material, partially shown, taken from a film supply reel 16.
  • the machine 10 comprises a frame 18 which rests on feet, such as 20, and on which are arranged a film forming device 22 conforming the film 14 of packaging material, by displacement of the film relative to the forming device, in a horizontal tube with longitudinal joint and a product batch conveyor 24 longitudinally movable between a retracted position for receiving a batch of products and a position for engaging this batch of products in the tube.
  • the conveyor 24 is shown in its product reception position.
  • the conveyor 24 forms an assembly driving during its movement on the one hand the products it contains and on the other hand the film 14 relative to the device forming 22.
  • the machine 10 comprises means 26 for cutting and closing the tube arranged at the outlet of the forming device 22 and intended to separate a tube formed from the supply coil and close each of the front and rear ends of the tube.
  • These cutting and closing means 26 are constituted in a known manner by two welding faults, a single fault 28, actuated by a corresponding control arm 30, being shown in this figure.
  • conveying means 32 intended to transfer the dough pieces 12 packed to another processing machine not shown, are arranged at the outlet of the cutting and closing means 26.
  • the conveying means 32 are constituted in a known manner by a set of transfer rollers 34, two longitudinal guides 36 for laterally guiding the packed dough pieces and a retractable stop 38 for longitudinal positioning of the dough pieces.
  • the supply reel 16 is disposed next to the forming device 22 parallel to the direction of movement of the batches of products, on two drive rollers 40 actuated by motor means not shown and intended to cause the unwinding of coil 16.
  • the machine 10 is completed by a control console 42 of known type intended to allow the control of the operation of the machine and the synchronized action of the various constituent elements thereof.
  • the product batch transporter 24 includes a loading plate 44 and a plunger 46 forming a piston.
  • the loading tray 44 is produced for example by means of a metal sheet and has a bottom wall 48 and two side walls 50, so that the tray 44 has a U-shaped cross section open upwards. It is connected to motorized mechanical displacement means, not shown, and comprises at the level of the lower face of the bottom wall 48 a guide 52 cooperating, during the movement of the plate 44, with a slide 54 formed in the frame 18 , the side walls 50 cooperating in turn with two corresponding guides 56 secured to the frame.
  • the pusher 46 is connected to a jack 51, for example a pneumatic jack, and is axially displaceable with the loading plate 44 and in it.
  • a jack 51 for example a pneumatic jack
  • the means for moving the plate 44 and the pusher 46 generate, during a first phase, a simultaneous movement of this plate 44 of the pusher 46 and, during a second phase, a separate movement of the tray 44 and pusher 46.
  • the means of movement of the plate 44 are of known type. They comprise a tray support which is detachably connected to a toothed belt driven in rotation by a motor, and on which the jack 51 is fixed.
  • the machine further comprises a member for detecting the longitudinal position of the pusher 46, constituted for example by a sensor 57 disposed at the outlet of the forming device 22.
  • the film forming device 22 comprises a film former 60 produced for example by means of a metal sheet and which has the shape of a parallelepiped provided with an upper wall 62, a lower wall 64 and two side walls 66 and 68 and the anterior and posterior ends of which are open so as to form a tunnel in which the product batch transporter 24 can be moved.
  • the forming device comprises a plate 70 for joining the edge of the film arranged opposite the side walls 66, 68 and lower 64 of the shaper 60.
  • the plate 70 is formed by the association of two longitudinal film guide parts. 72 and 74, square-shaped and each made of sheet metal.
  • each guide piece 72 and 74 is provided, in its part opposite the bottom 64 of the shaper, of an oblique cut, respectively 76 and 78. These cutouts converge towards the front of the shaper 60 in the direction of movement of the dough pieces 12, from top to bottom in this figure.
  • the two guide pieces are arranged with a partial overlap so that the cutouts form a V-shaped housing 79 and are superimposed in front of this V-shaped housing.
  • connection plate 70 further comprises a film holding plate 80 of triangular and planar shape, cooperating with each of the cutouts 76 and 78 so as to form two slots 81 for joining the opposite longitudinal edges of the film during the passage of the film. 14 in the forming device 60.
  • one of the guide pieces such as 72, has a lateral extension 82 for fixing to the frame 18, the other piece 74 being fixed to the shaper 60.
  • each film guide part 72 and 74 has, at its end zone opposite the plate 80, an opening intended to receive a corresponding film edge with a view to its superposition with the other edge.
  • the opening of one of the guide pieces 72 is constituted by a bent slot 83 for centering an L-shaped film through which the corresponding film edge passes.
  • the opening of the other part 74 is constituted by a notch 84 but may also include a bent L-shaped slot.
  • the film forming device 22 further comprises a soldering tip 85 disposed under the film junction plate 70, downstream of the openings 83 and 84 and intended to ensure the fixing by welding of the opposite longitudinal edges of the film 14 superimposed flat. in the interval between the parts 72 and 74 defined in the area of the slot 83 and the notch 84.
  • this soldering failure 84 is a soldering failure by projection of hot air, but it can also be constituted by any other soldering failure of known type. It is actuated during the movement of the film, the welding being thus done during this movement of the film and before its change.
  • two longitudinal guides 86 and 88 are arranged opposite the upper wall 62 of the former 60 so as to press the film 14 against this upper wall 62 (FIG. 2).
  • the film of packaging material 14 wound around the supply reel 16 is in the form of a film longitudinally folded at 180 ° at its median zone, the fold situated in the background of FIG. 2.
  • the width of the film is preferably substantially equal to the perimeter of the forming device 22.
  • the film 14 taken from the supply reel 16 travels between a set of guide and film conveying rollers, such as 90, preferably each mounted parallel to the supply reel 16.
  • a set of guide and film conveying rollers such as 90, preferably each mounted parallel to the supply reel 16.
  • one of these rollers is provided with a film tensioner 92 and a tension sensor 94 intended to measure the tension of the film 14.
  • the film 14 Downstream of the guide rollers 90, the film 14 is presented at the level of the film forming device 22.
  • the film 14 Downstream of the guide rollers, the film 14 is in its folded form. It has a posterior fold 96 and two opposite longitudinal edges 98 and 100. The direction of movement of the batches of products is located from the left to the right in FIG. 4 and it is represented by the arrow F.
  • the film 14 opens and forms a flat strip of packaging material.
  • the film is then inserted into the tube forming device 22 between the upper wall 62 of the former 60 and the longitudinal guides 86, 88 so that on the one hand the underside of the strip of packaging material is pressed against the upper wall 62 and the side walls 66 and 68 of the former 60 and that on the other hand one of the longitudinal edges of the film 14 is inserted between the internal face of one of the guide pieces 72 and the external face of the side wall 66 of the former 60, the other longitudinal edge of the film 14 being pressed against the external face of the part situated opposite the side wall 68 of the former 60, of the other longitudinal film guiding piece 74.
  • each of the longitudinal edges of the film 14 is inserted into a corresponding slot 81 formed in the plate 70 for joining the film.
  • a first edge 102 of the film 14 is located under the film holding plate 80 as shown in dotted lines and extends forwards, above the corresponding film guide part 72 as shown in solid lines, then in the film centering slot 83 to then be located , at the outlet of the shaper 60, opposite the soldering failure 85.
  • the other longitudinal edge 104 runs from rear to front, namely from the rear end to the front end of the film joining plate 70, above the film holding plate 80, below of the film guide piece 74, then passes through the opening 84 at the level of which this edge 104 is superimposed with the first edge 102.
  • the longitudinal edges 102 and 104 of the film 14 are superimposed and can be joined by welding by means of the tip 85.
  • the particular path of the film of packaging material 14 around the shaper 60 makes it possible to obtain a tube of substantially rectangular section with longitudinal joint adapted to receive dough pieces to be packaged and through which the batch conveyor 24 can circulate.
  • a reel 16 supplying the film of full packaging material 14 is placed on the drive rollers 40.
  • This film of packaging material 14 is longitudinally folded in half and thus delivered in a compact reel.
  • the film is then passed between the guide rollers 90 and then placed around the shaper 60 according to the path described above so as to form a tube.
  • the cutting and closing means are actuated, for example manually, so as to close the front end of the tube thus formed.
  • This closed front end of the tube thus closes the front end of the former.
  • Bread dough pieces 12, previously counted and, where appropriate, frozen, are placed in batches, for example of 5,10,30 or 50 products, according to demand, in the product batch conveyor 24, on the loading tray 44.
  • the packaging machine 10 is then in the configuration shown in FIG. 5, in which the product batch conveyor 24 is in its retracted product reception position.
  • the product batch conveyor 24 is moved through the shaper 60 from its position for receiving a batch of products towards its position for engaging a batch in the tube in which this conveyor 24 is located beyond the means 26 for cutting and closing the tube 26.
  • the plate 44 and the plunger 46 forming the piston are moved simultaneously and integrally, the piston 51 not being actuated.
  • the product batch transporter 24 abuts against this closed anterior end of the tube and thus causes an increase in the tension of the film.
  • the opposite edges of the film are first of all brought together, superimposed, then welded by means of the tip 85.
  • the edge 102 of the film inserted into the bent slot 83 is precisely positioned relative to the median axis of the plate 70 for joining the film by pressing against the bottom of this slot 83.
  • the bend of the tube is precisely and regularly arranged along the formed tube.
  • the dough pieces 12 are located in the tube downstream from the tube cutting and closing means 26, as shown in FIG. 6.
  • the loading plate 44 is retracted from the position of engagement of a batch of products in the tube towards its position of reception of a next batch.
  • the actuator 51 is actuated and the pusher 46 is disengaged in displacement of the plate 44 and therefore remains stationary in the position for engaging lots in the tube so as to exert a force which is opposed to the return force exerted by the loading plate 44 on the dough pieces 12.
  • the pusher 46 is moved to the position for receiving batches by means of the jack 51.
  • the tube 114 formed and filled with products is therefore separated from the film 14 from the reel 16 from which it is formed and its rear end is closed.
  • the anterior end of a tube in formation is also closed by a weld 115.
  • the machine can use a heat shrinkable polyethylene film 35 to 100 microns thick, preferably 55 microns, or a composite film of polyethylene and polyester 19 to 35 microns thick. preferably 25 microns thick.
  • the means of displacement of the loading plate 44, during its withdrawal stroke, and the jack 51, the rod of which carrying the plunger 46 forms a piston are selectively actuated so as to operate according to the kinematics described above. .
  • the machine 10 may include a set of sensors arranged on the frame 18 to identify at any time the position of the plate 44 and of the pusher 46 and of the appropriate control means of the means for moving the plate 44 and of the piston 51.
  • the machine can also use a film of cold-shrinkable packaging material.
  • the cheeks and the retractable stop are not used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

A machine for packaging prod. lots with film packaging (14) has a device (22) for forming the film into a longitudinally jointed tube and a prod. transporter (24) displaceable between a retracted position for loading prods. (12) upstream of the tube forming and a position engaging prod. in the formed tube. A cutting and sealing unit (26) separates the tube from the feed bobbin and seals it behind the loaded prods. and simultaneously forms the closed end of tube for insertion of the next prod. lot. The prod. lot transporter (24) has a piston (51) for moving the prods. in the transporter (24) and to feed the film from the forming device (22).

Description

La présente invention se rapporte à une machine d'emballage de lots de produits, particulièrement adaptée pour l'emballage automatique de produits de boulangerie, tels que des fardeaux de pâtons de baguettes ou d'autres pièces de pain, ou de tout autre produit de forme allongée.The present invention relates to a machine for packaging batches of products, particularly suitable for the automatic packaging of bakery products, such as baguette dough bundles or other pieces of bread, or any other product of elongated shape.

Actuellement, de nombreuses boulangeries indépendantes s'approvisionnent auprès de boulangeries industrielles qui leur livrent des pâtons de pain congelés ou frais, prêts à être cuits.Currently, many independent bakeries get their supplies from industrial bakeries that deliver frozen or fresh bread dough, ready to be baked.

Ces pâtons de pain sont généralement livrés sous forme de lots emballés dans une enveloppe de matière plastique de manière à les protéger durant leur transport.These bread dough pieces are generally delivered in the form of lots packed in a plastic envelope so as to protect them during their transport.

On connaît divers types de machines utilisées dans le domaine de la boulangerie industrielle pour la mise sous emballage de pâtons de pain.Various types of machines are known which are used in the field of industrial baking for packaging bread dough pieces.

De telles machines comportent un dispositif de formage d'un film de matière d'emballage en un tube à jointure longitudinale par déplacement relatif du film et du dispositif de formage, un transporteur de lots de produits longitudinalement déplaçable entre une position rétractée de réception d'un lot de produits dans laquelle le transporteur est situé en amont du dispositif de formage, en considérant le sens de déplacement des lots de produits, et une position d'engagement d'un lot de produits dans le tube et des moyens de coupure et de fermeture de tube disposés en sortie du dispositif de formage de tube et adaptés pour séparer le tube du film issu d'une bobine d'alimentation à partir duquel il est formé et fermer respectivement l'extrémité postérieure d'un tube formé contenant le lot de produits et l'extrémité antérieure d'un tube en formation.Such machines include a device for forming a film of packaging material into a tube with longitudinal joint by relative displacement of the film and the forming device, a product batch conveyor longitudinally movable between a retracted position for receiving a batch of products in which the conveyor is located upstream of the forming device, considering the direction of movement of the batches of products, and a position of engagement of a batch of products in the tube and of the cutting and tube closure arranged at the outlet of the tube forming device and adapted to separate the tube from the film coming from a supply reel from which it is formed and respectively close the rear end of a formed tube containing the batch of products and the anterior end of a forming tube.

On connaît par exemple une machine d'emballage utilisant deux bobines d'alimentation en film de matière d'emballage, dans laquelle le dispositif de formage de film conforme chacun des films prélevés sur une bobine correspondante en un demi-tube. Les deux demi-tubes sont joints au moyen de deux soudures longitudinales opposées pour former un tube dans lequel est engagé un lot de pâtons de pain.A packaging machine is known, for example, using two reels for feeding a film of material. packaging, in which the film forming device conforms each of the films taken from a corresponding reel into a half-tube. The two half-tubes are joined by means of two opposite longitudinal welds to form a tube in which a batch of bread dough pieces is engaged.

Cependant, ce type de machine d'emballage connue ne permet pas d'emballer un fardeau composé d'un nombre relativement important de pâtons de pain du fait de la relative fragilité du tube de matière d'emballage.However, this type of known packaging machine does not make it possible to pack a burden composed of a relatively large number of bread dough pieces due to the relative fragility of the tube of packaging material.

Un autre type de machine d'emballage connue utilise une unique bobine d'alimentation en film de matière d'emballage disposée transversalement par rapport au parcours du transporteur de lots de produits.Another type of known packaging machine uses a single reel for supplying a film of packaging material arranged transversely to the path of the conveyor of batches of products.

Le film est plaqué longitudinalement autour du dispositif de formage du film qui assure la soudure longitudinale des bords opposés du film. Deux rouleaux de traction disposés en sortie du dispositif de formage de film viennent en prise avec la jointure longitudinale du tube de manière à faire progresser le film dans le dispositif de formage pour constituer le tube.The film is laid longitudinally around the film forming device which ensures the longitudinal welding of the opposite edges of the film. Two traction rollers disposed at the outlet of the film forming device come into engagement with the longitudinal joint of the tube so as to advance the film in the forming device to constitute the tube.

Cette machine d'emballage ne permet pas non plus d'emballer un fardeau constitué de nombreux pâtons de pain, le film tiré ayant tendance à se déchirer du fait de la résistance engendrée par le poids des produits engagés dans le tube.This packaging machine also does not make it possible to pack a burden consisting of numerous loaves of bread, the film pulled tending to tear due to the resistance generated by the weight of the products engaged in the tube.

L'invention vise à pallier les inconvénients cités, en proposant une machine d'emballage permettant d'emballer un lot constitué d'un grand nombre de produits, tout en utilisant un film de matière d'emballage particulièrement fin.The invention aims to overcome the aforementioned drawbacks, by proposing a packaging machine making it possible to package a batch consisting of a large number of products, while using a film of particularly thin packaging material.

Elle a donc pour objet une machine d'emballage de lots formés chacun d'au moins un produit, notamment d'au moins un produit de boulangerie, au moyen d'un film de matière d'emballage prélevé en continu à partir d'une bobine d'alimentation, comprenant un dispositif de formage du film en un tube à jointure longitudinale par déplacement relatif du film et du dispositif de formage, un transporteur de lots de produits longitudinalement déplaçable entre une position rétractée de réception d'un lot de produits dans laquelle le transporteur est situé en amont du dispositif de formage, en considérant le sens de déplacement du lot de produits, et une position d'engagement d'un lot de produits dans le tube et des moyens de coupure et de fermeture de tube disposés en sortie du dispositif de formage du film et adaptés pour séparer le tube du film issu de la bobine d'alimentation à partir duquel il est formé et fermer respectivement l'extrémité postérieure d'un tube formé contenant le lot de produits et l'extrémité antérieure d'un tube en formation, caractérisée en ce que le transporteur de lots de produits comprend un piston d'entraînement du lot de produits contenus dans ledit transporteur et, par l'intermédiaire dudit lot, de l'extrémité antérieure fermée du tube en formation, pour entraîner le film par rapport au dispositif de formage.It therefore relates to a machine for packaging batches each formed of at least one product, in particular at least one bakery product, by means of a film of packaging material taken continuously from a supply reel, comprising a device for forming the film into a tube with longitudinal joint by relative displacement of the film and the forming device, a product batch conveyor longitudinally movable between a retracted position for receiving a batch of products in which the conveyor is located upstream of the forming device, considering the direction of movement of the batch of products, and a position of engagement of a batch of products in the tube and means for cutting and closing the tube arranged in exit from the film forming device and adapted to separate the tube from the film coming from the supply reel from which it is formed and close the rear end of a formed tube containing the batch of products and the front end respectively of a tube in formation, characterized in that the product batch conveyor comprises a piston for driving the batch of products contained in said transport tor and, via said batch, from the closed anterior end of the tube in formation, for driving the film with respect to the forming device.

Plus précisément et selon l'invention, le dispositif de formage de film comporte un conformateur de film formant tunnel à travers lequel est déplaçable le transporteur de lots de produits et autour duquel passe le film de matière d'emballage, l'extrémité antérieure fermée du tube en formation obturant l'extrémité avant du conformateur et une platine de jonction disposée sous le conformateur et munie de fentes de réunion des bords longitudinaux opposés du film au cours de la formation du tube, lesdites fentes convergeant vers l'avant du conformateur dans le sens de déplacement des lots de produits.More precisely and according to the invention, the film forming device comprises a film former forming a tunnel through which the product batch conveyor is movable and around which the film of packaging material passes, the closed anterior end of the tube in formation sealing the front end of the former and a junction plate disposed under the former and provided with slots for joining the opposite longitudinal edges of the film during the formation of the tube, said slots converging towards the front of the former in the direction of movement of batches of products.

Selon une caractéristique particulière de l'invention, la platine de jonction comporte deux pièces longitudinales de guidage de film disposées côté à côté et munies chacune d'une découpe oblique, lesdites découpes convergeant vers l'avant du conformateur et une plaque triangulaire de maintien de film coopérant avec le bord de chaque découpe pour constituer lesdites fentes de réunion des bords du film.According to a particular characteristic of the invention, the joining plate comprises two longitudinal film guide parts arranged side by side and each provided with an oblique cutout, said cutouts converging towards the front of the former and a triangular film holding plate cooperating with the edge of each cutout to form said slots for joining the edges of the film.

Avantageusement, chacune des pièces de guidage de film comporte à son extrémité opposée à la découpe oblique une ouverture pour le passage d'un bord de film correspondant en vue de sa superposition avec l'autre bord, une panne de soudage étant disposée au niveau desdites ouvertures.Advantageously, each of the film guide pieces has at its end opposite the oblique cut an opening for the passage of a corresponding film edge for its superposition with the other edge, a welding tip being disposed at said openings.

Selon une autre caractéristique de l'invention, l'ouverture de passage d'un bord de film d'au moins une des pièces de guidage de film comporte une fente transversale coudée en vue du recentrage d'un bord correspondant par rapport à l'axe de la platine de jonction de film.According to another characteristic of the invention, the opening for passage of a film edge of at least one of the film guide parts has a bent transverse slot in order to center a corresponding edge relative to the axis of the film joining plate.

De préférence, le transporteur de lots de produits comporte un plateau de chargement allongé à section en forme de U ouvert vers le haut et destiné à la réception successive des lots de produits à emballer et des moyens de déplacement longitudinal du plateau entre lesdites positions de réception et d'engagement d'un lot de produits dans le tube.Preferably, the product batch conveyor comprises an elongated loading tray with U-shaped section open upwards and intended for the successive reception of the batches of products to be packaged and means for longitudinal displacement of the plate between said reception positions. and engaging a batch of products in the tube.

Dans un mode de réalisation particulier, le transporteur de lots de produits comporte un poussoir déplaçable axialement et solidairement avec le plateau de chargement dans le sens de déplacement dans le tube, ledit poussoir et ledit plateau étant désolidarisables au cours du mouvement de retrait dudit plateau entre lesdites positions d'engagement et de réception en vue d'assurer une immobilisation dudit poussoir de manière à maintenir axialement les produits dans le tube au cours dudit mouvement de retrait du plateau.In a particular embodiment, the product batch conveyor comprises a pusher movable axially and integrally with the loading plate in the direction of movement in the tube, said pusher and said plate being separable during the movement of withdrawal of said plate between said positions of engagement and reception in order to ensure immobilization of said pusher so as to axially maintain the products in the tube during said movement of withdrawal of the plate.

En outre, la machine comporte un organe de détection de la position du poussoir adapté pour provoquer l'action des moyens de coupure et de fermeture de tube au cours du mouvement de retrait dudit poussoir entre ladite position d'engagement dans le tube et ladite position de réception de lots.In addition, the machine comprises a member for detecting the position of the pusher adapted to cause the action of the tube cutting and closing means during the movement of withdrawal of said pusher between said position of engagement in the tube and said position. receiving lots.

De préférence, la machine comporte un ensemble de rouleaux de guidage et d'acheminement de film vers le dispositif de formage, et la bobine d'alimentation en film de matière d'emballage porte un film longitudinalement plié à 180° dont la largeur est sensiblement égale au périmètre du dispositif de formage, ladite bobine d'alimentation et lesdits rouleaux de guidage et d'acheminement étant disposés sensiblement parallèlement au sens de déplacement des lots de produits.Preferably, the machine comprises a set of guide and film conveying rollers towards the forming device, and the reel for supplying the film of packaging material carries a film longitudinally folded at 180 °, the width of which is substantially equal to the perimeter of the forming device, said supply reel and said guide and conveying rollers being arranged substantially parallel to the direction of movement of the batches of products.

Avantageusement, le film de matière d'emballage est un film de polyéthylène de 35 à 100 microns d'épaisseur, ou un film composite de polyéthylène et de polyester, ledit film ayant une épaisseur de 19 à 35 microns.Advantageously, the film of packaging material is a polyethylene film 35 to 100 microns thick, or a composite film of polyethylene and polyester, said film having a thickness of 19 to 35 microns.

D'autres caractéristiques et avantages de l'invention ressortiront de la description suivante, donnée à titre d'exemple et sans caractère limitatif, en regard des dessins annexés sur lesquels :

  • la figure 1 représente une vue en perspective de la machine selon l'invention ;
  • la figure 2 représente une vue schématique de face d'une bobine d'alimentation et du dispositif de formage de film de la machine d'emballage représentée sur la figure 1 ;
  • la figure 3 représente une vue en coupe à plus grande échelle selon la ligne 3-3 de la figure 2 ;
  • la figure 4 représente une vue schématique en perspective du film de matière d'emballage passant autour du dispositif de formage de la figure 2 ; et
  • les figures 5 à 8 sont des vues schématiques de profil du dispositif de formage et du transporteur de lots de produits de la machine d'emballage de la figure 1 au cours de l'emballage d'un lot de pâtons de pain.
Other characteristics and advantages of the invention will emerge from the following description, given by way of example and without limitation, with reference to the appended drawings in which:
  • Figure 1 shows a perspective view of the machine according to the invention;
  • 2 shows a schematic front view of a supply reel and the film forming device of the packaging machine shown in Figure 1;
  • Figure 3 shows an enlarged sectional view along line 3-3 of Figure 2;
  • 4 shows a schematic perspective view of the film of packaging material passing around the forming device of Figure 2; and
  • Figures 5 to 8 are schematic side views of the forming device and the product batch conveyor of the packaging machine of Figure 1 during the packaging of a batch of bread dough pieces.

Sur la figure 1 on a représenté une machine d'emballage d'un lot de produits, qui porte la référence numérique 10.FIG. 1 shows a machine for packaging a batch of products, which has the reference numeral 10.

Cette machine 10 est destinée à emballer un lot de pâtons de baguettes de pain 12 dans un film 14 de matière d'emballage, partiellement représenté, prélevé à partir d'une bobine d'alimentation en film 16.This machine 10 is intended to package a batch of dough for bread sticks 12 in a film 14 of packaging material, partially shown, taken from a film supply reel 16.

La machine 10 comporte un bâti 18 qui repose sur des pieds, tels que 20, et sur lequel sont disposés un dispositif de formage de film 22 conformant le film 14 de matière d'emballage, par déplacement du film par rapport au dispositif de formage, en un tube horizontal à jointure longitudinale et un transporteur de lots de produits 24 longitudinalement déplaçable entre une position rétractée de réception d'un lot de produits et une position d'engagement de ce lot de produits dans le tube. Sur cette figure, le transporteur 24 est représenté dans sa position de réception de produits.The machine 10 comprises a frame 18 which rests on feet, such as 20, and on which are arranged a film forming device 22 conforming the film 14 of packaging material, by displacement of the film relative to the forming device, in a horizontal tube with longitudinal joint and a product batch conveyor 24 longitudinally movable between a retracted position for receiving a batch of products and a position for engaging this batch of products in the tube. In this figure, the conveyor 24 is shown in its product reception position.

Selon l'invention et comme cela sera expliqué en détail par la suite, le transporteur 24 forme un ensemble entraînant au cours de son mouvement d'une part les produits qu'il contient et d'autre part le film 14 par rapport au dispositif de formage 22.According to the invention and as will be explained in detail below, the conveyor 24 forms an assembly driving during its movement on the one hand the products it contains and on the other hand the film 14 relative to the device forming 22.

Par ailleurs, la machine 10 comporte des moyens 26 de coupure et de fermeture de tube disposés en sortie du dispositif de formage 22 et destinés à séparer un tube formé de la bobine d'alimentation et fermer chacune des extrémités antérieure et postérieure du tube.Furthermore, the machine 10 comprises means 26 for cutting and closing the tube arranged at the outlet of the forming device 22 and intended to separate a tube formed from the supply coil and close each of the front and rear ends of the tube.

Ces moyens de coupure et de fermeture 26 sont constitués de façon connue par deux pannes de soudage, une seule panne 28, actionnée par un bras de commande correspondant 30, étant représentée sur cette figure.These cutting and closing means 26 are constituted in a known manner by two welding faults, a single fault 28, actuated by a corresponding control arm 30, being shown in this figure.

En outre, des moyens de convoyage 32, destinés à transférer les pâtons 12 emballés vers une autre machine de traitement non représentée, sont disposés en sortie des moyens de coupure et de fermeture 26. Les moyens de convoyage 32 sont constitués de façon connue par un ensemble de rouleaux de transfert 34, de deux guides longitudinaux 36 destinés à guider latéralement les pâtons emballés et d'une butée escamotable 38 de positionnement longitudinal des pâtons.In addition, conveying means 32, intended to transfer the dough pieces 12 packed to another processing machine not shown, are arranged at the outlet of the cutting and closing means 26. The conveying means 32 are constituted in a known manner by a set of transfer rollers 34, two longitudinal guides 36 for laterally guiding the packed dough pieces and a retractable stop 38 for longitudinal positioning of the dough pieces.

Avantageusement, la bobine d'alimentation 16 est disposée à côté du dispositif de formage 22 de façon parallèle au sens de déplacement des lots de produits, sur deux rouleaux d'entraînement 40 actionnés par des moyens moteurs non représentés et destinés à provoquer le dévidage de la bobine 16.Advantageously, the supply reel 16 is disposed next to the forming device 22 parallel to the direction of movement of the batches of products, on two drive rollers 40 actuated by motor means not shown and intended to cause the unwinding of coil 16.

La machine 10 est complétée par un pupitre de commande 42 de type connu destiné à permettre le contrôle du fonctionnement de la machine et l'action synchronisée des différents éléments constitutifs de celle-ci.The machine 10 is completed by a control console 42 of known type intended to allow the control of the operation of the machine and the synchronized action of the various constituent elements thereof.

Avantageusement, le transporteur de lots de produits 24 comporte un plateau de chargement 44 et un poussoir 46 formant piston. Le plateau de chargement 44 est réalisé par exemple au moyen d'une feuille métallique et comporte une paroi de fond 48 et deux parois latérales 50, de sorte que le plateau 44 présente une section transversale en forme de U ouvert vers le haut. Il est relié à des moyens de déplacement mécaniques motorisés, non représentés, et comporte au niveau de la face inférieure de la paroi de fond 48 un guide 52 coopérant, au cours du déplacement du plateau 44, avec une glissière 54 ménagée dans le bâti 18, les parois latérales 50 coopérant quant à elles avec deux guides correspondants 56 solidaires du bâti.Advantageously, the product batch transporter 24 includes a loading plate 44 and a plunger 46 forming a piston. The loading tray 44 is produced for example by means of a metal sheet and has a bottom wall 48 and two side walls 50, so that the tray 44 has a U-shaped cross section open upwards. It is connected to motorized mechanical displacement means, not shown, and comprises at the level of the lower face of the bottom wall 48 a guide 52 cooperating, during the movement of the plate 44, with a slide 54 formed in the frame 18 , the side walls 50 cooperating in turn with two corresponding guides 56 secured to the frame.

Le poussoir 46 est relié à un vérin 51, par exemple un vérin pneumatique, et est axialement déplaçable avec le plateau de chargement 44 et dans celui-ci.The pusher 46 is connected to a jack 51, for example a pneumatic jack, and is axially displaceable with the loading plate 44 and in it.

Comme cela est mentionné par la suite, les moyens de déplacement du plateau 44 et du poussoir 46 engendrent au cours d'une première phase un déplacement simultané de ce plateau 44 du poussoir 46 et, au cours d'une seconde phase un déplacement séparé du plateau 44 et du poussoir 46.As mentioned below, the means for moving the plate 44 and the pusher 46 generate, during a first phase, a simultaneous movement of this plate 44 of the pusher 46 and, during a second phase, a separate movement of the tray 44 and pusher 46.

Les moyens de déplacements du plateau 44 sont de type connu. Ils comportent un support de plateau relié de façon amovible à une courroie dentée entraînée en rotation par un moteur, et sur lequel est fixé le vérin 51.The means of movement of the plate 44 are of known type. They comprise a tray support which is detachably connected to a toothed belt driven in rotation by a motor, and on which the jack 51 is fixed.

De préférence, la machine comporte en outre un organe de détection de la position longitudinale du poussoir 46, constitué par exemple par un capteur 57 disposé à la sortie du dispositif de formage 22.Preferably, the machine further comprises a member for detecting the longitudinal position of the pusher 46, constituted for example by a sensor 57 disposed at the outlet of the forming device 22.

En se référant aux figures 2 et 3, le dispositif de formage de film 22 comporte un conformateur de film 60 réalisé par exemple au moyen d'une tôle métallique et qui a une forme de parallélépipède muni d'une paroi supérieure 62, d'une paroi inférieure 64 et de deux parois latérales 66 et 68 et dont les extrémités antérieure et postérieure sont ouvertes de manière à former un tunnel dans lequel est déplaçable le transporteur de lots de produits 24.Referring to Figures 2 and 3, the film forming device 22 comprises a film former 60 produced for example by means of a metal sheet and which has the shape of a parallelepiped provided with an upper wall 62, a lower wall 64 and two side walls 66 and 68 and the anterior and posterior ends of which are open so as to form a tunnel in which the product batch transporter 24 can be moved.

Par ailleurs, le dispositif de formage comporte une platine 70 de jonction de bord de film disposée en regard des parois latérales 66,68 et inférieure 64 du conformateur 60. La platine 70 est constituée par l'association de deux pièces longitudinales de guidage de film 72 et 74, en forme d'équerre et réalisées chacune en tôle.Furthermore, the forming device comprises a plate 70 for joining the edge of the film arranged opposite the side walls 66, 68 and lower 64 of the shaper 60. The plate 70 is formed by the association of two longitudinal film guide parts. 72 and 74, square-shaped and each made of sheet metal.

En se référant plus particulièrement à la figure 3, chaque pièce de guidage 72 et 74 est munie, dans sa partie en regard du fond 64 du conformateur, d'une découpe oblique, respectivement 76 et 78. Ces découpes convergent vers l'avant du conformateur 60 selon le sens du déplacement des pâtons 12, du haut vers le bas sur cette figure. Les deux pièces de guidage sont disposées avec un chevauchement partiel de telle sorte que les découpes forment un logement en V 79 et sont superposées en avant de ce logement en V.Referring more particularly to FIG. 3, each guide piece 72 and 74 is provided, in its part opposite the bottom 64 of the shaper, of an oblique cut, respectively 76 and 78. These cutouts converge towards the front of the shaper 60 in the direction of movement of the dough pieces 12, from top to bottom in this figure. The two guide pieces are arranged with a partial overlap so that the cutouts form a V-shaped housing 79 and are superimposed in front of this V-shaped housing.

La platine de jonction 70 comporte en outre une plaque de maintien de film 80 de forme triangulaire et plane, coopérant avec chacune des découpes 76 et 78 de manière à former deux fentes 81 de réunion des bords longitudinaux opposés du film au cours du passage du film 14 dans le dispositif de formage 60.The connection plate 70 further comprises a film holding plate 80 of triangular and planar shape, cooperating with each of the cutouts 76 and 78 so as to form two slots 81 for joining the opposite longitudinal edges of the film during the passage of the film. 14 in the forming device 60.

En outre, une des pièces de guidage, telle que 72, comporte un prolongement latéral 82 de fixation sur le bâti 18, l'autre pièce 74 étant fixée sur le conformateur 60.In addition, one of the guide pieces, such as 72, has a lateral extension 82 for fixing to the frame 18, the other piece 74 being fixed to the shaper 60.

De surcroît, chaque pièce de guidage de film 72 et 74 comporte au niveau de sa zone d'extrémité opposée à la plaque 80 une ouverture destinée à recevoir un bord de film correspondant en vue de sa superposition avec l'autre bord.In addition, each film guide part 72 and 74 has, at its end zone opposite the plate 80, an opening intended to receive a corresponding film edge with a view to its superposition with the other edge.

Avantageusement, l'ouverture d'une des pièces de guidage 72 est constituée par une fente coudée 83 de centrage de film en forme de L dans laquelle passe le bord de film correspondant.Advantageously, the opening of one of the guide pieces 72 is constituted by a bent slot 83 for centering an L-shaped film through which the corresponding film edge passes.

L'ouverture de l'autre pièce 74 est constituée par une encoche 84 mais peut également comporter une fente coudée en L.The opening of the other part 74 is constituted by a notch 84 but may also include a bent L-shaped slot.

Le dispositif de formage de film 22 comporte en outre une panne de soudure 85 disposée sous la platine de jonction de film 70, en aval des ouvertures 83 et 84 et destinée à assurer la fixation par soudage des bords longitudinaux opposés du film 14 superposés à plat dans l'intervalle entre les pièces 72 et 74 défini dans la zone de la fente 83 et de l'encoche 84.The film forming device 22 further comprises a soldering tip 85 disposed under the film junction plate 70, downstream of the openings 83 and 84 and intended to ensure the fixing by welding of the opposite longitudinal edges of the film 14 superimposed flat. in the interval between the parts 72 and 74 defined in the area of the slot 83 and the notch 84.

Avantageusement, cette panne de soudure 84 est une panne de soudure par projection d'air chaud, mais elle peut également être constituée par toute autre panne de soudure de type connu. Elle est actionnée au cours du déplacement du film, la soudure se faisant ainsi pendant ce déplacement du film et avant son changement.Advantageously, this soldering failure 84 is a soldering failure by projection of hot air, but it can also be constituted by any other soldering failure of known type. It is actuated during the movement of the film, the welding being thus done during this movement of the film and before its change.

Par ailleurs, deux guides longitudinaux 86 et 88 sont disposés en regard de la paroi supérieure 62 du conformateur 60 de manière à plaquer le film 14 contre cette paroi supérieure 62 (figure 2).Furthermore, two longitudinal guides 86 and 88 are arranged opposite the upper wall 62 of the former 60 so as to press the film 14 against this upper wall 62 (FIG. 2).

Selon une autre caractéristique particulière de l'invention, le film de matière d'emballage 14 enroulé autour de la bobine 16 d'alimentation se présente sous la forme d'un film longitudinalement plié à 180° au niveau de sa zone médiane, le pli se situant en arrière plan de la figure 2. En outre, la largeur du film est de préférence sensiblement égale au périmètre du dispositif de formage 22.According to another particular characteristic of the invention, the film of packaging material 14 wound around the supply reel 16 is in the form of a film longitudinally folded at 180 ° at its median zone, the fold situated in the background of FIG. 2. In addition, the width of the film is preferably substantially equal to the perimeter of the forming device 22.

Le film 14 prélevé à partir de la bobine 16 d'alimentation chemine entre un ensemble de rouleaux de guidage et d'acheminement de film, tels que 90, de préférence montés chacun de façon parallèle à la bobine d'alimentation 16. De préférence, un de ces rouleaux est muni d'un tendeur de film 92 et d'un capteur de tension 94 destiné à mesurer la tension du film 14.The film 14 taken from the supply reel 16 travels between a set of guide and film conveying rollers, such as 90, preferably each mounted parallel to the supply reel 16. Preferably, one of these rollers is provided with a film tensioner 92 and a tension sensor 94 intended to measure the tension of the film 14.

La circulation du film de matière d'emballage 14 entre les rouleaux de guidage 90 s'effectue selon le sens de la flèche F représentée sur cette figure.The circulation of the film of packaging material 14 between the guide rollers 90 takes place in the direction of the arrow F shown in this figure.

En aval des rouleaux de guidage 90, le film 14 est présenté au niveau du dispositif de formage du film 22.Downstream of the guide rollers 90, the film 14 is presented at the level of the film forming device 22.

Le trajet du film 14 au niveau de ce dispositif de formage 22 va maintenant être décrit en référence aux figures 2 à 4.The path of the film 14 at the level of this forming device 22 will now be described with reference to FIGS. 2 to 4.

Sur la figure 4, le film a été fictivement découpé et représenté à l'état détendu et certains détails de la forme du film ont été exagérés pour améliorer la clarté de la figure.In Figure 4, the film has been fictitiously cut and shown in the relaxed state and some details of the shape of the film have been exaggerated to improve the clarity of the figure.

En aval des rouleaux de guidage, le film 14 se présente sous sa forme pliée. Il comporte une pliure postérieure 96 et deux bords longitudinaux opposés 98 et 100. Le sens de déplacement des lots de produits se situe de la gauche vers la droite de la figure 4 et il est représenté par la flèche F.Downstream of the guide rollers, the film 14 is in its folded form. It has a posterior fold 96 and two opposite longitudinal edges 98 and 100. The direction of movement of the batches of products is located from the left to the right in FIG. 4 and it is represented by the arrow F.

En amont du dispositif de formage 22, selon le sens de déplacement des pâtons représenté par des flèches F sur les figures 3 et 4, le film 14 s'ouvre et forme une bande plane de matière d'emballage. Le film est alors inséré dans le dispositif de formage de tube 22 entre la paroi supérieure 62 du conformateur 60 et les guides longitudinaux 86,88 de telle sorte que d'une part la face inférieure de la bande de matière d'emballage soit plaquée contre la paroi supérieure 62 et les parois latérales 66 et 68 du conformateur 60 et que d'autre part un des bords longitudinaux du film 14 soit inséré entre la face interne d'une des pièces de guidage 72 et la face externe de la paroi latérale 66 du conformateur 60, l'autre bord longitudinal du film 14 étant plaqué contre la face externe de la partie située en regard de la paroi latérale 68 du conformateur 60, de l'autre pièce longitudinale de guidage de film 74.Upstream of the forming device 22, in the direction of movement of the dough pieces represented by arrows F in FIGS. 3 and 4, the film 14 opens and forms a flat strip of packaging material. The film is then inserted into the tube forming device 22 between the upper wall 62 of the former 60 and the longitudinal guides 86, 88 so that on the one hand the underside of the strip of packaging material is pressed against the upper wall 62 and the side walls 66 and 68 of the former 60 and that on the other hand one of the longitudinal edges of the film 14 is inserted between the internal face of one of the guide pieces 72 and the external face of the side wall 66 of the former 60, the other longitudinal edge of the film 14 being pressed against the external face of the part situated opposite the side wall 68 of the former 60, of the other longitudinal film guiding piece 74.

Dans cette position, chacun des bords longitudinaux du film 14 est inséré dans une fente 81 correspondante formée dans la platine 70 de jonction de film.In this position, each of the longitudinal edges of the film 14 is inserted into a corresponding slot 81 formed in the plate 70 for joining the film.

Dès lors, comme cela est représenté sur la figure 3, un premier bord 102 du film 14 est situé sous la plaque 80 de maintien de film comme cela est représenté en pointillés et se prolonge vers l'avant, au dessus de la pièce de guidage de film 72 correspondante comme représenté en trait plein, puis dans la fente de centrage de film 83 pour être ensuite situé, à la sortie du conformateur 60, en regard de la panne de soudure 85.Therefore, as shown in Figure 3, a first edge 102 of the film 14 is located under the film holding plate 80 as shown in dotted lines and extends forwards, above the corresponding film guide part 72 as shown in solid lines, then in the film centering slot 83 to then be located , at the outlet of the shaper 60, opposite the soldering failure 85.

L'autre bord longitudinal 104 chemine de l'arrière vers l'avant, à savoir de l'extrémité postérieure à l'extrémité antérieure de la platine de jonction de film 70, au dessus de la plaque de maintien de film 80, en dessous de la pièce de guidage de film 74, puis passe par l'ouverture 84 au niveau de laquelle ce bord 104 est superposé avec le premier bord 102.The other longitudinal edge 104 runs from rear to front, namely from the rear end to the front end of the film joining plate 70, above the film holding plate 80, below of the film guide piece 74, then passes through the opening 84 at the level of which this edge 104 is superimposed with the first edge 102.

Ainsi, en aval de la platine de jonction de film 70, les bords longitudinaux 102 et 104 du film 14 sont superposés et peuvent être réunis par soudage au moyen de la panne 85.Thus, downstream of the film joining plate 70, the longitudinal edges 102 and 104 of the film 14 are superimposed and can be joined by welding by means of the tip 85.

Le parcours particulier du film de matière d'emballage 14 autour du conformateur 60 permet d'obtenir un tube de section sensiblement rectangulaire à jointure longitudinale adapté pour recevoir des pâtons à emballer et à travers lequel peut circuler le transporteur de lots 24.The particular path of the film of packaging material 14 around the shaper 60 makes it possible to obtain a tube of substantially rectangular section with longitudinal joint adapted to receive dough pieces to be packaged and through which the batch conveyor 24 can circulate.

Le fonctionnement de la machine d'emballage de pâtons de pain qui vient d'être décrite va maintenant être détaillé en référence aux figures 1, et 5 à 8.The operation of the bread dough packaging machine which has just been described will now be detailed with reference to FIGS. 1, and 5 to 8.

Lors de la mise en marche la machine d'emballage 10, une bobine d'alimentation 16 en film de matière d'emballage 14 pleine est placée sur les rouleaux d'entraînement 40.When the packaging machine 10 is started, a reel 16 supplying the film of full packaging material 14 is placed on the drive rollers 40.

Ce film de matière d'emballage 14 est longitudinalement plié en deux et livré ainsi en bobine compacte.This film of packaging material 14 is longitudinally folded in half and thus delivered in a compact reel.

Le film est alors passé entre les rouleaux de guidage 90 puis disposé autour du conformateur 60 selon le trajet décrit précédemment de manière à former un tube.The film is then passed between the guide rollers 90 and then placed around the shaper 60 according to the path described above so as to form a tube.

Les moyens de coupure et de fermeture sont actionnés, par exemple de façon manuelle, de manière à fermer l'extrémité antérieure du tube ainsi formé.The cutting and closing means are actuated, for example manually, so as to close the front end of the tube thus formed.

Cette extrémité antérieure fermée du tube obture ainsi l'extrémité avant du conformateur.This closed front end of the tube thus closes the front end of the former.

Des pâtons de pain 12, préalablement comptés et, les cas échéant, congelés, sont placés par lots par exemple de 5,10,30 ou 50 produits, selon la demande, dans le transporteur de lots de produits 24, sur le plateau de chargement 44. La machine 10 d'emballage se situe alors dans la configuration représentée sur la figure 5, dans laquelle le transporteur de lots de produits 24 se trouve dans sa position rétractée de réception de produits.Bread dough pieces 12, previously counted and, where appropriate, frozen, are placed in batches, for example of 5,10,30 or 50 products, according to demand, in the product batch conveyor 24, on the loading tray 44. The packaging machine 10 is then in the configuration shown in FIG. 5, in which the product batch conveyor 24 is in its retracted product reception position.

Lors d'une seconde étape, le transporteur de lots de produits 24 est déplacé à travers le conformateur 60 de sa position de réception d'un lot de produits vers sa position d'engagement d'un lot dans le tube dans laquelle ce transporteur 24 se situe au-delà des moyens 26 de coupure et de fermeture de tube 26. Au cours de cette étape, le plateau 44 et le poussoir 46 formant piston sont déplacés simultanément et solidairement, le piston 51 n'étant pas actionné.During a second step, the product batch conveyor 24 is moved through the shaper 60 from its position for receiving a batch of products towards its position for engaging a batch in the tube in which this conveyor 24 is located beyond the means 26 for cutting and closing the tube 26. During this step, the plate 44 and the plunger 46 forming the piston are moved simultaneously and integrally, the piston 51 not being actuated.

L'extrémité antérieure du tube ayant été préalablement fermée, au cours de son déplacement dans le tube, le transporteur de lots de produits 24 butte contre cette extrémité antérieure fermée du tube et provoque ainsi une augmentation de la tension du film.The anterior end of the tube having been previously closed, during its movement in the tube, the product batch transporter 24 abuts against this closed anterior end of the tube and thus causes an increase in the tension of the film.

Cette augmentation de film est détectée par le capteur 94 (figure 2) qui provoque à sont tour le fonctionnement des rouleaux d'entraînement 40 et donc le dévidage de la bobine d'alimentation 16.This increase in film is detected by the sensor 94 (FIG. 2) which in turn causes the operation of the drive rollers 40 and therefore the unwinding of the supply reel 16.

Dès lors, au cours de son déplacement, le transporteur de lots de produits 24 provoque le déroulement du film 14 et son déplacement par rapport au dispositif de formage du film 22.Consequently, during its movement, the transporter of batches of products 24 causes the progress of the film 14 and its displacement relative to the film forming device 22.

Comme cela a été mentionné précédemment, au cours du déplacement du film 14 par rapport au dispositif de formage, les bords opposés du film sont tout d'abord rapprochés, superposés, puis soudés au moyen de la panne 85.As mentioned previously, during the movement of the film 14 relative to the forming device, the opposite edges of the film are first of all brought together, superimposed, then welded by means of the tip 85.

Par ailleurs, au cours de sa circulation le bord 102 du film inséré dans la fente coudée 83 est précisément positionné par rapport à l'axe médian de la platine 70 de jonction de film par appui contre le fond de cette fente 83.Furthermore, during its circulation, the edge 102 of the film inserted into the bent slot 83 is precisely positioned relative to the median axis of the plate 70 for joining the film by pressing against the bottom of this slot 83.

Ainsi la pliure du tube est précisément et régulièrement disposée le long du tube formé.Thus the bend of the tube is precisely and regularly arranged along the formed tube.

En bout de course du transporteur de lots de produits 24, les pâtons 12 sont situés dans le tube en aval des moyens 26 de coupure et de fermeture de tube, comme cela est représenté sur la figure 6.At the end of travel of the product batch conveyor 24, the dough pieces 12 are located in the tube downstream from the tube cutting and closing means 26, as shown in FIG. 6.

Au cours de l'étape suivante, le plateau de chargement 44 est rétracté de la position d'engagement d'un lot de produits dans le tube vers sa position de réception d'un lot suivant. Au cours de ce déplacement, le vérin 51 est actionné et le poussoir 46 est désolidarisé en déplacement du plateau 44 et reste dès lors immobile dans la position d'engagement de lots dans le tube de manière à exercer une force qui s'oppose à la force de rappel exercée par le plateau de chargement 44 sur les pâtons 12. Lorsque le plateau de chargement 44 est revenu dans sa position initiale rétractée, le poussoir 46 est déplacé vers la position de réception de lots au moyen du vérin 51.During the next step, the loading plate 44 is retracted from the position of engagement of a batch of products in the tube towards its position of reception of a next batch. During this movement, the actuator 51 is actuated and the pusher 46 is disengaged in displacement of the plate 44 and therefore remains stationary in the position for engaging lots in the tube so as to exert a force which is opposed to the return force exerted by the loading plate 44 on the dough pieces 12. When the loading plate 44 has returned to its initial retracted position, the pusher 46 is moved to the position for receiving batches by means of the jack 51.

Le début du déplacement du poussoir 46 suivant sa course de retour est détecté par le capteur de position 57 qui provoque l'action des moyens de fermeture et de coupure de tube, comme cela est représenté sur la figure 7.The start of movement of the pusher 46 following its return stroke is detected by the position sensor 57 which causes the action of the closing and tube cut, as shown in figure 7.

Le tube 114 formé et rempli de produits est dès lors séparé du film 14 issu de la bobine 16 à partir duquel il est formé et son extrémité arrière est fermée.The tube 114 formed and filled with products is therefore separated from the film 14 from the reel 16 from which it is formed and its rear end is closed.

En outre, à la fin de cette étape, l'extrémité antérieure d'un tube en formation est également fermée par une soudure 115.Furthermore, at the end of this step, the anterior end of a tube in formation is also closed by a weld 115.

En se référant à la figure 8, lorsque des pâtons 12 ont été emballés dans un tube de matière d'emballage fermé à ses extrémités antérieure et postérieure, le fardeau ainsi constitué est disposé sur les moyens de convoyage 32 entre les guides 36 et contre la butée escamotable 38 de manière à aligner les pâtons dans leur emballage. Puis un autre lot de pâtons 12 est disposé dans le transporteur de lots 24, comme représenté sur la figure 5.Referring to Figure 8, when dough pieces 12 have been wrapped in a tube of packing material closed at its anterior and posterior ends, the burden thus formed is placed on the conveying means 32 between the guides 36 and against the retractable stop 38 so as to align the dough pieces in their packaging. Then another batch of dough pieces 12 is placed in the batch conveyor 24, as shown in FIG. 5.

La machine dont la structure et le fonctionnement viennent d'être décrits peut utiliser un film rétractable à chaud de polyéthylène de 35 à 100 microns d'épaisseur de préférence 55 microns ou un film composite de polyéthylène et de polyester de 19 à 35 microns d'épaisseur de préférence 25 microns.The machine, the structure and operation of which have just been described, can use a heat shrinkable polyethylene film 35 to 100 microns thick, preferably 55 microns, or a composite film of polyethylene and polyester 19 to 35 microns thick. preferably 25 microns thick.

Dans ce cas, afin que le fardeau ainsi constitué conserve sa forme, il est ensuite amené par l'intermédiaire des moyens de convoyage 32 dans un four de refusion dans lequel le film est rétracté.In this case, so that the burden thus formed retains its shape, it is then brought via the conveyor means 32 into a reflow oven in which the film is shrunk.

Bien entendu, comme mentionné précédemment les moyens de déplacement du plateau de chargement 44, lors de sa course de retrait, et le vérin 51, dont la tige portant le poussoir 46 forme piston, sont sélectivement actionnés de manière à fonctionner selon la cinématique décrite précédemment.Of course, as mentioned above, the means of displacement of the loading plate 44, during its withdrawal stroke, and the jack 51, the rod of which carrying the plunger 46 forms a piston, are selectively actuated so as to operate according to the kinematics described above. .

A cet effet, la machine 10 peut comprendre un ensemble de capteurs disposés sur le bâti 18 pour identifier à tout instant la position du plateau 44 et du poussoir 46 et des moyens de commande appropriée des moyens de déplacement du plateau 44 et du piston 51.To this end, the machine 10 may include a set of sensors arranged on the frame 18 to identify at any time the position of the plate 44 and of the pusher 46 and of the appropriate control means of the means for moving the plate 44 and of the piston 51.

Cependant, d'autres dispositifs connus de commande des moyens de déplacement du plateau de chargement 44 et du piston 51 peuvent également être utilisés.However, other known devices for controlling the means for moving the loading plate 44 and the piston 51 can also be used.

L'invention n'est pas limitée au mode de réalisation qui a été décrit.The invention is not limited to the embodiment which has been described.

C'est ainsi que la machine dont la structure et le fonctionnement viennent d'être décrits peut également utiliser un film de matière d'emballage rétractable à froid. Dans ce cas, les joues ainsi que la butée escamotable ne sont pas utilisées.Thus the machine, the structure and operation of which have just been described, can also use a film of cold-shrinkable packaging material. In this case, the cheeks and the retractable stop are not used.

Claims (10)

Machine d'emballage de lots formés chacun d'au moins un produit (12), notamment d'au moins un produit de boulangerie, au moyen d'un film (14) de matière d'emballage prélevé en continu à partir d'une bobine d'alimentation (16), comprenant un dispositif de formage du film (22) en un tube à jointure longitudinale par déplacement relatif du film (14) et du dispositif de formage (22), un transporteur de lots de produits (24) longitudinalement déplaçable entre une position rétractée de réception d'un lot de produits dans laquelle le transporteur (24) est situé en amont du dispositif de formage (22), en considérant le sens de déplacement du lot de produits, et une position d'engagement d'un lot de produits dans le tube et des moyens de coupure et de fermeture de tube (26) disposés en sortie du dispositif de formage du film (22) et adaptés pour séparer le tube du film (14) issu de la bobine d'alimentation à partir duquel il est formé et fermer respectivement (16) l'extrémité postérieure d'un tube formé contenant le lot de produits (12) et l'extrémité antérieure d'un tube en formation, ledit transporteur (24) de lots de produits comprenant un piston d'entraînement du lot de produits (12) contenus dans ledit transporteur (24) et, par l'intermédiaire dudit lot, de l'extrémité antérieure fermée du tube en formation, pour entraîner le film par rapport au dispositif de formage (22), caractérisée en ce que le dispositif de formage de film (22) comporte un conformateur de film (60) formant tunnel à travers lequel est déplaçable le transporteur (24) de lots de produits (12) et autour duquel passe le film (14) de matière d'emballage, l'extrémité antérieure fermée du tube en formation obturant l'extrémité avant du conformateur (60) et une platine de jonction (70) disposée sous le conformateur (60) et munie de fentes (81) de réunion des bords longitudinaux opposés (102,104) du film (14) au cours de la formation du tube, lesdites fentes (81) convergeant vers l'avant du conformateur (60) dans le sens de déplacement des lots de produits (12).Machine for packaging batches each formed of at least one product (12), in particular at least one bakery product, by means of a film (14) of packaging material taken continuously from a supply reel (16), comprising a device for forming the film (22) into a tube with longitudinal joint by relative movement of the film (14) and the forming device (22), a product batch conveyor (24) longitudinally movable between a retracted position for receiving a batch of products in which the conveyor (24) is located upstream of the forming device (22), considering the direction of movement of the batch of products, and a position of engagement of a batch of products in the tube and means for cutting and closing the tube (26) arranged at the outlet of the film forming device (22) and adapted to separate the tube from the film (14) coming from the reel d feed from which it is formed and close respectively (16) the end posterior tee of a formed tube containing the batch of products (12) and the anterior end of a tube in formation, said conveyor (24) of batches of products comprising a piston driving the batch of products (12) contained in said conveyor (24) and, via said batch, from the closed anterior end of the forming tube, for driving the film relative to the forming device (22), characterized in that the film forming device (22) comprises a film former (60) forming a tunnel through which the conveyor (24) of product batches (12) is movable and around which the film (14) of packaging material passes, the front end closed of the forming tube closing the front end of the former (60) and a junction plate (70) arranged under the former (60) and provided with slots (81) for joining the opposite longitudinal edges (102, 104) of the film (14) during the formation of the tube, said slots (81) converging towards the front of the shaper (60) in the direction of movement of the batches of products (12). Machine selon la revendication 1, caractérisée en ce que la platine de jonction (70) comporte deux pièces longitudinales (72,74) de guidage de film (14) disposées côté à côté et munies chacune d'une découpe oblique (76,78), lesdites découpes (76,78) convergeant vers l'avant du conformateur (60) et une plaque triangulaire (80) de maintien de film (14) coopérant avec le bord de chaque découpe (76,78) pour constituer lesdites fentes (81) de réunion des bords du film.Machine according to claim 1, characterized in that the joining plate (70) comprises two longitudinal pieces (72,74) of film guide (14) arranged side by side and each provided with an oblique cutout (76,78) , said cutouts (76,78) converging towards the front of the former (60) and a triangular plate (80) for holding the film (14) cooperating with the edge of each cutout (76,78) to form said slots (81 ) of meeting the edges of the film. Machine selon la revendication 2, caractérisée en ce que chacune des pièces de guidage de film (72,74) comporte à son extrémité opposée à la découpe oblique (76,78) une ouverture (83,84) pour le passage d'un bord de film (102,104) correspondant en vue de sa superposition avec l'autre bord, une panne de soudage (85) étant disposée au niveau desdites ouvertures (83,84).Machine according to claim 2, characterized in that each of the film guide pieces (72,74) has at its end opposite the oblique cut (76,78) an opening (83,84) for the passage of an edge corresponding film (102,104) for superimposition with the other edge, a welding tip (85) being disposed at said openings (83,84). Machine selon la revendication 3, caractérisée en ce que l'ouverture de passage d'un bord de film d'au moins une des pièces de guidage de film comporte une fente transversale coudée (83) en vue du recentrage d'un bord correspondant (102) par rapport à l'axe de la platine de jonction de film (70).Machine according to claim 3, characterized in that the opening for the passage of a film edge of at least one of the film guide parts comprises an angled transverse slot (83) for the purpose of centering a corresponding edge ( 102) relative to the axis of the film joining plate (70). Machine selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le transporteur de lots de produits (24) comporte un plateau de chargement (44) allongé à section en forme de U ouvert vers le haut et destiné à la réception successive des lots de produits (12) à emballer et des moyens de déplacement longitudinal du plateau (44) entre lesdites positions de réception et d'engagement d'un lot de produits dans le tube.Machine according to any one of claims 1 to 4, characterized in that the product batch conveyor (24) comprises a loading platform (44) elongated in U-shaped section open upwards and intended for successive reception batches of products (12) to be packaged and means for longitudinal displacement of the plate (44) between said positions for receiving and engaging a batch of products in the tube. Machine selon la revendication 5, caractérisée en ce que le transporteur (24) de lots de produits comporte un poussoir (46) déplaçable axialement et solidairement avec le plateau de chargement (44) dans le sens de déplacement dans le tube, ledit poussoir (46) et ledit plateau (44) étant désolidarisables au cours du mouvement de retrait dudit plateau entre lesdites positions d'engagement et de réception en vue d'assurer une immobilisation dudit poussoir (46) de manière à maintenir axialement les produits (12) dans le tube au cours dudit mouvement de retrait du plateau (44).Machine according to claim 5, characterized in that the conveyor (24) of batches of products comprises a pusher (46) movable axially and integrally with the loading plate (44) in the direction of movement in the tube, said pusher (46) and said plate (44) being detachable during the movement of withdrawal of said plate between said engagement and reception positions in order to ensure immobilization of said pusher (46) so as to axially maintain the products (12) in the tube during said movement of withdrawal of the plate (44). Machine selon la revendication 6, caractérisée en ce qu'elle comporte un organe de détection (57) de la position du poussoir (46) adapté pour provoquer l'action des moyens de coupure et de fermeture de tube au cours du mouvement de retrait dudit poussoir (46) entre ladite position d'engagement dans le tube et ladite position de réception de lots.Machine according to claim 6, characterized in that it comprises a member (57) for detecting the position of the pusher (46) adapted to cause the action of the tube cutting and closing means during the movement of withdrawal of said tube pusher (46) between said position of engagement in the tube and said position for receiving batches. Machine selon l'une quelconque des revendications 1 à 7, caractérisée en ce qu'elle comporte un ensemble de rouleaux de guidage et d'acheminement de film (90) vers le dispositif de formage (22), et en ce que la bobine d'alimentation (16) en film de matière d'emballage porte un film longitudinalement plié à 180° dont la largeur est sensiblement égale au périmètre du dispositif de formage (22), ladite bobine d'alimentation (16) et lesdits rouleaux de guidage et d'acheminement (90) étant disposés sensiblement parallèlement au sens de déplacement des lots de produits (12).Machine according to any one of claims 1 to 7, characterized in that it comprises a set of guide and film conveying rollers (90) towards the forming device (22), and in that the spool d the supply (16) of packaging material film carries a film longitudinally folded at 180 ° the width of which is substantially equal to the perimeter of the forming device (22), said supply reel (16) and said guide rollers and routing (90) being arranged substantially parallel to the direction of movement of the batches of products (12). Machine selon l'une quelconque des revendications 1 à 8, caractérisée en ce que le film de matière d'emballage (14) est un film de polyéthylène de 35 à 100 microns d'épaisseur.Machine according to any one of Claims 1 to 8, characterized in that the film of packaging material (14) is a polyethylene film 35 to 100 microns thick. Machine selon l'une quelconque des revendications 1 à 8, caractérisée en ce que le film de matière d'emballage (14) est un film composite de polyéthylène et de polyester, ledit film ayant une épaisseur de 19 à 35 microns.Machine according to any one of Claims 1 to 8, characterized in that the film of packaging material (14) is a composite film of polyethylene and polyester, said film having a thickness of 19 to 35 microns.
EP96401366A 1996-06-20 1996-06-20 Machine for packaging groups of objects Withdrawn EP0814022A1 (en)

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EP96401366A EP0814022A1 (en) 1996-06-20 1996-06-20 Machine for packaging groups of objects

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EP96401366A EP0814022A1 (en) 1996-06-20 1996-06-20 Machine for packaging groups of objects

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20090501A1 (en) * 2009-07-29 2011-01-30 Sotemapack S R L APPARATUS AND METHOD FOR PACKAGING PRODUCTS.
CN107405575A (en) * 2014-12-23 2017-11-28 纤维膜制造科技有限两合公司 Apparatus and method for manufacturing wire harness

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH463369A (en) * 1965-09-08 1968-09-30 Tabak & Ind Masch Device for longitudinally closing a packaging tube made of weldable or sealable packaging
US4924659A (en) * 1988-07-19 1990-05-15 International Sankoh Kabushiki Kaisha Sealing height adjusting device for package wrapping apparatus
GB2237008A (en) * 1989-10-13 1991-04-24 Final Packaging Ltd Dancer rollers
DE4106899C1 (en) * 1991-03-05 1992-07-30 Rudolf Dipl.-Ing. Wehinger (Fh), 7449 Neckartenzlingen, De Horizontal plastics bag making and filling machine - has shovel-shaped goods thruster with inner stripper movable w.r.t. thruster
FR2728233A1 (en) * 1994-12-19 1996-06-21 Perot Robert Machine for packaging prod. lots with film packaging

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH463369A (en) * 1965-09-08 1968-09-30 Tabak & Ind Masch Device for longitudinally closing a packaging tube made of weldable or sealable packaging
US4924659A (en) * 1988-07-19 1990-05-15 International Sankoh Kabushiki Kaisha Sealing height adjusting device for package wrapping apparatus
GB2237008A (en) * 1989-10-13 1991-04-24 Final Packaging Ltd Dancer rollers
DE4106899C1 (en) * 1991-03-05 1992-07-30 Rudolf Dipl.-Ing. Wehinger (Fh), 7449 Neckartenzlingen, De Horizontal plastics bag making and filling machine - has shovel-shaped goods thruster with inner stripper movable w.r.t. thruster
FR2728233A1 (en) * 1994-12-19 1996-06-21 Perot Robert Machine for packaging prod. lots with film packaging

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20090501A1 (en) * 2009-07-29 2011-01-30 Sotemapack S R L APPARATUS AND METHOD FOR PACKAGING PRODUCTS.
CN107405575A (en) * 2014-12-23 2017-11-28 纤维膜制造科技有限两合公司 Apparatus and method for manufacturing wire harness

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