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EP0257267B1 - Procédé et dispositif pour envelopper des objets dans une feuille soudable - Google Patents

Procédé et dispositif pour envelopper des objets dans une feuille soudable Download PDF

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Publication number
EP0257267B1
EP0257267B1 EP87110078A EP87110078A EP0257267B1 EP 0257267 B1 EP0257267 B1 EP 0257267B1 EP 87110078 A EP87110078 A EP 87110078A EP 87110078 A EP87110078 A EP 87110078A EP 0257267 B1 EP0257267 B1 EP 0257267B1
Authority
EP
European Patent Office
Prior art keywords
foil
fold
tunnel
objects
edge
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.)
Expired - Lifetime
Application number
EP87110078A
Other languages
German (de)
English (en)
Other versions
EP0257267A3 (en
EP0257267A2 (fr
Inventor
Werner Diez
Peter Gottwald
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.)
Womako Maschinenkonstruktionen GmbH
Original Assignee
Womako Maschinenkonstruktionen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Womako Maschinenkonstruktionen GmbH filed Critical Womako Maschinenkonstruktionen GmbH
Publication of EP0257267A2 publication Critical patent/EP0257267A2/fr
Publication of EP0257267A3 publication Critical patent/EP0257267A3/de
Application granted granted Critical
Publication of EP0257267B1 publication Critical patent/EP0257267B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • 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
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs

Definitions

  • the invention relates to a method for wrapping articles in a weldable film, in particular shrink film, in which the articles are inserted from the open side between two films consisting of a first film which takes up a position corresponding to the conveying plane of the advanced articles and a second film are, with the foils from below and above the object and pressed together and welded longitudinally and transversely to the direction of advance behind the object.
  • the invention also relates to a device for wrapping objects in a weldable film, in particular shrink film, with a guiding and shaping device for a film web consisting of a first film and a second film, and with conveying means for the articles which can be driven synchronously with the speed at which the films are pulled off.
  • German Offenlegungsschrift 25 12 005 describes a device of the type described at the outset, according to which an upper and a lower film are formed in mirror image around the packaged goods by means of laterally arranged guide means, the longitudinal weld seams being formed approximately at the level of the center of the side of the objects.
  • document FR-A-1 576 314 discloses a packaging device in which a single sheet of film is also fed in synchronism with the object to be wrapped and is thereby placed on the corresponding sides of the article, the section of film fed from below being one of the conveying plane of the fed Subject occupies appropriate position.
  • the invention has for its object to achieve a relatively large format range of objects to be packaged with a certain film width, a perfect film wrapping with secure closure seams.
  • the second film is pre-shaped in a U-shape and with edge strips extending outwards and parallel to the first film and forms an essentially rectangular tunnel with the first film, into which the objects are introduced.
  • An optimal embodiment of the method referred to is that the first film forms a lower film which is applied to the object from below and the second film forms an upper film which is applied to the object from above.
  • the device for carrying out the method described at the outset is characterized in that the shaping device is designed as a shaping shoulder which has a guide surface for the one film, which is tapered in relation to the withdrawal direction of the one film and on which The back opens into a centrally running folding tunnel, which on both sides folds out the excess of an edge section of the film resulting from the difference between the original width of the supplied film and three sides of the circumference of the folding tunnel and merges it with the other film in the area of the conveying plane of the objects. and management means are assigned.
  • the best possible configuration of the device is provided if the shaping device is arranged to receive an upper film above the objects to be wrapped or above their conveying means and if, according to an additional embodiment, below the shaping device at the level of the conveying level of the object conveying means, conveying means for a smooth surface moving bottom film are arranged.
  • the guide surface of the shaped shoulder is provided with deflecting edges which run obliquely in the pull-off direction of the one film up to the entrance corners of the folding tunnel is.
  • a crease-free and particularly well-fitting deformation of the film in the conveying flow of the objects to be wrapped is achieved in that the folding tunnel is delimited by three U-shaped mutually arranged end fold edges, which are arranged at right angles to one another according to a further proposal, and ideally the wrapping profile correspond to the object.
  • the folding tunnel is limited on its open side by two longitudinal folding edges, which according to FIG.
  • the two foils merge with the formation of adjacent edge strips.
  • the folding strips are limited according to an additional proposal by an outer edge folding edge running relative to the pull-off direction of the films with an outwardly directed inclined component.
  • the folding strips are assigned an inner deflecting folding edge which extends essentially in the longitudinal direction of the folding tunnel and which, on the one hand, cooperates with the deflecting edge of the guiding surface of the shaped shoulder and on the other hand with the folding edge of the folding strip to guide and fold the edge section of the one film .
  • a configuration which facilitates the conveying flow of the upper film consists in that the lateral end folding edges of the folding tunnel are arranged inclined in the conveying direction of the film.
  • the guide surface of the shaped shoulder is arranged inclined in the conveying direction of the film.
  • the deflecting edges of the guide surface and the lateral front folding edges of the folding tunnel form a right angle.
  • the design of the shape shoulder according to the invention allows different objects to be encased with a certain film width.
  • a simple adaptation of the shape shoulder to these objects of different sizes is possible according to further embodiments in that the shape shoulder for changing the folding tunnel width from two relative mutually adjustable shoulder side parts and to change the height of the folding tunnel consists of two relatively adjustable upper and lower shoulder parts.
  • the film covering produced in accordance with the invention is free of wrinkles over a large format range of the objects to be wrapped, so that qualitatively perfect weld seams are achieved which are tear-resistant during the shrinking process.
  • the shaping device shown in the drawing is designed as a shaping shoulder 1, which is fastened to a frame of a film wrapping machine, not shown, with the aid of mounting struts 2 and mounting screws 3.
  • a conveying means in the form of individual conveyor belts 6, which can be driven in the direction of the arrow 4, for objects 7, which can be stacks of paper, for example, are assigned to the shaping shoulder 1 upstream or on the input side.
  • the conveyor belts 6 are guided downwards in front of the shaped shoulder 1 by means of deflection rollers 8.
  • a feed means in the form of a feed roller 9 for a lower film 11 is indicated, which is introduced into the conveying plane of the objects 7 in a straight alignment in the direction of withdrawal indicated by the arrow 12.
  • the shaped shoulder 1 is used for feeding and preforming a via a guide roller 13 in the withdrawal direction of the arrow 14 running upper film 16.
  • the shaped shoulder 1 is provided with a downward-sloping straight guide surface 17 tapering in the pull-off direction 14 for receiving the upper film 16.
  • the guide surface 17 opens into a folding tunnel 18 which runs centrally on the back of the shaped shoulder 1 and which is open at the bottom and which is delimited on the input side by an upper and two lateral, straight, and mutually perpendicular front folding edges 19 and 21.
  • a folding tunnel 18 which runs centrally on the back of the shaped shoulder 1 and which is open at the bottom and which is delimited on the input side by an upper and two lateral, straight, and mutually perpendicular front folding edges 19 and 21.
  • two deflecting edges 22 of the guide surface 17 which run towards one another in the pull-off direction 14 and terminate the guide surface 17, end.
  • the lateral end fold edges 21 are inclined in the conveying direction of the upper film 16 and form a right angle with the deflecting edges 22 of the guide surface 17.
  • the folding tunnel 18 On its downward open side, the folding tunnel 18 is also delimited by two longitudinal folding edges 23 which merge into right and left-hand folding strips 24, which form folding and guiding means for the upper film 16 and the lower film 11 and which are in the area of the Extend the outside of the folding tunnel 18 at the level of the conveying plane of the objects 7 or the bottom film 11.
  • the folding strips 24 are in turn delimited by an outer edge folding edge 26 which runs relative to the withdrawal direction 12 of the films 11, 16 and has an outwardly directed inclined component.
  • a folding sword 27 extends on the upper side of the folding strip 24 and is provided with an inner deflecting folding edge 28 which extends essentially in the longitudinal direction of the folding tunnel 18.
  • the size of the folding tunnel 18 can be adjusted in height and width in order to adapt to different formats of the individual objects 7.
  • shoulder 1 from two shoulder side parts 32 and 33 which are adjustable relative to one another in the direction of the double arrow 29 on a mounting rod 31, and from in the direction of the double arrow 34 with the aid of an elongated hole 36 arranged on both sides of the shaped shoulder 1 and a locking bolt 37 relatively adjustable upper and lower shoulder parts 38 and 39 .
  • the lower film 11 and the upper film 16 are pulled forward together and synchronously continuously, the upper film 16 being drawn with its central region into the folding tunnel 18 in such a way that its front folding edges 19 and 21 arranged at right angles to one another, the upper film 16 corresponding to the one to be wrapped Preform the rectangular profile of item 7.
  • the synchronously and continuously conveyed and moving objects 7 are conveyed into the folding tunnel 18 and wrapped by crease-free application of the lower film 11 and the preformed upper film 16.
  • a secure and wrinkle-free guidance of the excess edge portion of the upper film 16 is achieved by folding the Excess material of the upper film 16 is reached with the aid of the deflection folding edge 28 of the folding sword 27 and the edge folding edge 26 of the folding strip 24.
  • the oblique deflection edges 22 of the guide surface 17 and the edge folding edges 26 of the folding strip 24 offer sufficient scope for deflecting and unfolding the correspondingly different edge sections of the upper film 16. In this way, different formats with a single film width can be adjusted Form shoulder 1 can be mastered.
  • the foil webs that thus envelop successive objects 7 in a mutual distance are subsequently subjected to a separation welding process in the form of a longitudinal seam in the region of the edge strips 41 in a known manner, for which purpose, for example, a separation welding device according to DE-OS 34 43 991 is used.
  • the film webs are subjected to a separating welding process along a seam running transversely to the direction of displacement of the objects 7, and thus the encased objects 7 are separated, for which purpose a separating welding device according to DE-PS 20 08 595 is used.
  • the welded-in objects 7 isolated in this way subsequently pass through a shrink tunnel, as described, for example, in DE-AS 19 20 863, in which the two foils undergo a shrinking process by heating and are thus placed closely on the object.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Basic Packing Technique (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Claims (17)

  1. Procédé d'emballage d'objets (7) dans une feuille soudable, en particulier une feuille rétractable,dans lequel les objets sont insérés entre deux bandes de feuille convergentes, à partir de leur côté ouvert, constituées d'une première feuille (11) prenant la position correspondant au plan de transport des objets avancés et d'une deuxième feuille, les deux feuilles s'appliquant à l'objet depuis le bas et le haut et étant pressées l'une contre l'autre longitudinalement ainsi que transversalement, derrière l'objet introduit, par rapport à la direction (12) d'avance , et soudées, caractérisé en ce que la deuxième feuille est préformée en forme de U et avec des bandes marginales s'étendant vers l'extérieur et parallèlement à la première feuille et constitue avec la première feuille un tunnel sensiblement rectangulaire dans lequel sont introduits les objets.
  2. Procédé selon la revendication 1, caractérisé en ce que la première feuille constitue une feuille inférieure s'appliquent à l'objet à partir du dessous et que la deuxième feuille constitue une feuille supérieure s'appliquant sur l'objet à partir du dessus.
  3. Dispositif d'emballage d'objets dans une feuille soudable, en particulier une feuille rétractile, comportant un agencement de guidage et de formage destiné à des bandes de feuilles constituées d'une première feuille et d'une deuxième feuille ainsi que des moyens de transport destinés aux objets et susceptibles d'être entraînés de façon synchrone avec la vitesse d'extraction des feuilles, caractérisé en ce que l'agencement de formage est réalisé sous forme d'épaulement de formage (1) qui présente une surface de guidage (17), destinée à la première feuille (16), qui, par rapport à la direction d'extraction (14) de la première feuille, est réalisé en se rétrécissant et débouche sur le côté arrière dans un tunnel de pliage (18) s'étendant centralement auquel sont associés des moyens de pliage et de guidage (24, 27) qui replient l'excès d'une partie de bord de la feuille, provoqué par la différence entre la largeur initiale de la feuille amenée et trois côtés de la périphérie du tunnel du pliage, et qui convergent avec l'autre feuille (11) dans la zone du plan de transport des objets (7).
  4. Dispositif selon la revendication 3, caractérisé en ce que l'agencement de formage (1) est agencé au-dessus des objets à emballer (7) ou au-dessus de leurs moyens de transport (6) en recevant une feuille supérieure (16).
  5. Dispositif selon la revendication 3 et/ou 4, caractérisé en ce que des moyens d'amenée (9) pour une feuille inférieure (11) convergente dans une surface plane sont agencés au-dessous de l'agencement de formage (1) à la hauteur du plan de transport des moyens de transport (6) des objets.
  6. Dispositif selon l'une des revendications 3 à 5, caractérisé en ce que la surface de guidage (17) de l'épaulement de formage (1) est pourvue d'arêtes formant déflecteurs (22) convergentes entre elles en oblique, jusqu'aux coins d'entrée du tunnel de pliage (18), dans la direction d'extraction (14) de la première feuille (16).
  7. Dispositif selon l'une des revendications 3 à 6, caractérisé en ce que le tunnel de pliage (18) est limité par trois arêtes de pliage frontales (19, 21) agencées les unes vis-à-vis des autres en formant un U.
  8. Dispositif selon la revendication 7, caractérisé en ce que les arêtes de pliage frontales (19, 21) du tunnel de pliage (18) sont agencées perpendiculairement entre elles.
  9. Dispositif selon l'une des revendications 3 à 8, caractérisé en ce que le tunnel de pliage (18) est limité à son côté ouvert par deux arêtes de pliage longitudinales (23).
  10. Dispositif selon la revendication 9, caractérisé en ce que les arêtes de pliage longitudinales (23) se raccordent dans des baguettes de pliage (24) qui s'étendent dans la zone des côtés extérieurs du tunnel de pliage (18) à hauteur du plan de transport des objets (7), et font converger les deux feuilles (11, 16) en réalisant des bandes marginales adjacentes (41).
  11. Dispositif selon la revendication 10, caractérisé en ce que les baguettes de pliage (24) sont limitées par une arête extérieure (26) de pliage de bord s'étendant avec une composante oblique orientée vers l'extérieur par rapport à la direction d'extraction (12) des feuilles (11, 16).
  12. Dispositif selon la revendication 10 et/ou 11, caractérisé en ce qu'est associée aux baguettes de pliage (24) une arête intérieure de pliage (28) formant déflecteur qui s'étend sensiblement dans la direction longitudinale du tunnel de pliage (18) et qui coopère pour le guidage et le pliage de la partie de bord de la première feuille (16) d'une part avec l'arête formant déflecteur (22) de la surface de guidage (17) et d'autre part avec l'arête (26) de pliage de bord des baguettes de pliage.
  13. Dispositif selon la revendication 7, caractérisé en ce que les arêtes de pliage frontales latérales (21) du tunnel de pliage (18) sont agencées inclinées dans la direction de transport de la feuille (16).
  14. Dispositif selon l'une des revendications 3 à 13, caractérisé en ce que la surface de guidage (17) de l'épaulement de formage (1) est agencée inclinée dans la direction de transport (14) de la feuille (16).
  15. Dispositif selon l'une des revendications 3 à 14, caractérisé en ce que des arêtes formant déflecteurs (22) de la surface de guidage (17) et les arêtes de pliage frontales latérales (21) du tunnel de pliage (18) comprennent entre elles un angle droit.
  16. Dispositif selon l'une des revendications 3 à 15, caractérisé en ce que l'épaulement de formage (1) destiné à modifier la largeur du tunnel de pliage se compose de deux parties latérales (32, 33) d'épaulement réglables l'une par rapport à l'autre.
  17. Dispositif selon l'une des revendications 3 à 16, caractérisé en ce que l'épaulement de formage (1) destiné à modifier la hauteur du tunnel de pliage se compose de deux parties, supérieure et inférieure, d'épaulement (38, 39) réglables l'une par rapport à l'autre.
EP87110078A 1986-08-22 1987-07-13 Procédé et dispositif pour envelopper des objets dans une feuille soudable Expired - Lifetime EP0257267B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3628630 1986-08-22
DE3628630 1986-08-22

Publications (3)

Publication Number Publication Date
EP0257267A2 EP0257267A2 (fr) 1988-03-02
EP0257267A3 EP0257267A3 (en) 1989-02-15
EP0257267B1 true EP0257267B1 (fr) 1992-03-25

Family

ID=6308014

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110078A Expired - Lifetime EP0257267B1 (fr) 1986-08-22 1987-07-13 Procédé et dispositif pour envelopper des objets dans une feuille soudable

Country Status (3)

Country Link
US (1) US4779399A (fr)
EP (1) EP0257267B1 (fr)
DE (1) DE3777720D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647751B1 (fr) * 1989-06-02 1992-03-20 Valle Roland Installation de conditionnement automatique d'objets sous film souple
US7013621B2 (en) * 2003-06-18 2006-03-21 Shanklin Corporation Adjustable package geometry web forming apparatus and method
US20050262812A1 (en) * 2004-05-26 2005-12-01 Thorpe Charles C Shaped seal bar and knife for sealing and cutting a contoured shape for a flow wrap machine
TW201408544A (zh) * 2012-08-30 2014-03-01 Cheng I Food Co Ltd 片狀或塊狀食品之包裝機
CN111137474A (zh) * 2019-12-30 2020-05-12 南通佳宝机械有限公司 一种自动压缩制袋包装机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3090174A (en) * 1960-08-24 1963-05-21 Nat Dairy Prod Corp Packaging method and apparatus
US3490194A (en) * 1965-08-09 1970-01-20 Serv All Machinery Corp Packaging machine
DE1761749A1 (de) * 1967-10-28 1971-08-05 Fmi Mecfond Aziende Mecc Verpackungsmaschine
FR2229613A1 (en) * 1973-05-16 1974-12-13 Holweg Stains Automatic packaging machine for e.g. bread - delivers to packing station, wraps in film, welds film, separates packages
US4169344A (en) * 1978-01-30 1979-10-02 Sagan Industries, Inc. Apparatus for fabricating cushioning and insulating material
US4396447A (en) * 1982-04-09 1983-08-02 Applied Plastics Co., Inc. Apparatus and method to maintain positive separation of reactive bands

Also Published As

Publication number Publication date
DE3777720D1 (de) 1992-04-30
US4779399A (en) 1988-10-25
EP0257267A3 (en) 1989-02-15
EP0257267A2 (fr) 1988-03-02

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