EP0257267A2 - 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 PDFInfo
- Publication number
- EP0257267A2 EP0257267A2 EP87110078A EP87110078A EP0257267A2 EP 0257267 A2 EP0257267 A2 EP 0257267A2 EP 87110078 A EP87110078 A EP 87110078A EP 87110078 A EP87110078 A EP 87110078A EP 0257267 A2 EP0257267 A2 EP 0257267A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- folding
- objects
- tunnel
- 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.)
- Granted
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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 objects in a weldable film, in particular shrink film, in which the objects are inserted between two converging film webs consisting of a first film and a second film, from the open side thereof, the films being from below and above place on the object and be pressed and welded along and across the feed direction behind the object being pushed.
- 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 film webs 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 lower film are formed in mirror image by means of laterally arranged guide means around the packaged goods, the longitudinal weld seams being formed approximately at the level of the center of the side of the objects.
- the invention has for its object to achieve a perfect film wrapping with secure closure seams in a relatively large format range of the objects to be packaged with a certain film width.
- first film assumes a position corresponding to the conveying plane of the objects being advanced and in that the second film forms an essentially rectangular tunnel which receives the objects and extends as far as the plane first film with it parallel to the outside towards the first Foil extending edge strip is preformed.
- 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 centrally on the back running folding tunnel opens, which on both sides folds off 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 in the region of the conveying plane of the objects with the other film merging folding and guiding 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 direction of withdrawal 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 In order to bring the excess edge section of the film into a wrinkle-free position accessible for longitudinal welding, the folding tunnel is limited on its open side by two longitudinal folding edges, which according to an additional configuration in the area of the outside of the folding tunnel at the level of the conveying plane of the Objects extending, the two foils merging with the formation of adjacent edge strips merge.
- 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 shaped shoulder to these objects of different sizes is possible according to further embodiments in that the shaped shoulder for changing the folding tunnel width consists of two shoulder parts that can be adjusted relative to one another and for changing the folding tunnel height consists of two shoulder tops and shoulder parts that can be adjusted relative to one another.
- the film covering produced in the manner according to 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 shaped 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 perpendicularly arranged 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 perpendicularly arranged 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-facing 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 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 foils 11, 16 and has an outwardly directed inclined component.
- a folding sword 27 extends on the upper side of the folding bar 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)
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 true EP0257267A2 (fr) | 1988-03-02 |
| EP0257267A3 EP0257267A3 (en) | 1989-02-15 |
| EP0257267B1 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0401137A1 (fr) * | 1989-06-02 | 1990-12-05 | Pack Plus S.A.R.L. | Installation de conditionnement automatique d'objets sous film souple |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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)
| 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 |
-
1987
- 1987-07-13 EP EP87110078A patent/EP0257267B1/fr not_active Expired - Lifetime
- 1987-07-13 DE DE8787110078T patent/DE3777720D1/de not_active Expired - Fee Related
- 1987-08-24 US US07/088,937 patent/US4779399A/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0401137A1 (fr) * | 1989-06-02 | 1990-12-05 | Pack Plus S.A.R.L. | Installation de conditionnement automatique d'objets sous film souple |
| FR2647751A1 (fr) * | 1989-06-02 | 1990-12-07 | Valle Roland | Installation de conditionnement automatique d'objets sous film souple |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0257267B1 (fr) | 1992-03-25 |
| EP0257267A3 (en) | 1989-02-15 |
| US4779399A (en) | 1988-10-25 |
| DE3777720D1 (de) | 1992-04-30 |
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