EP0962388A1 - Procédé et machine pour fabriquer des emballages - Google Patents
Procédé et machine pour fabriquer des emballages Download PDFInfo
- Publication number
- EP0962388A1 EP0962388A1 EP99109574A EP99109574A EP0962388A1 EP 0962388 A1 EP0962388 A1 EP 0962388A1 EP 99109574 A EP99109574 A EP 99109574A EP 99109574 A EP99109574 A EP 99109574A EP 0962388 A1 EP0962388 A1 EP 0962388A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- sealing
- cover
- sealed
- product
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 26
- 238000004806 packaging method and process Methods 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 4
- 238000012856 packing Methods 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 3
- 235000013372 meat Nutrition 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 235000013351 cheese Nutrition 0.000 claims description 2
- 244000144977 poultry Species 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 1
- 239000010408 film Substances 0.000 description 59
- 239000011888 foil Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- -1 polypropylene Polymers 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 6
- 229920000573 polyethylene Polymers 0.000 description 6
- 235000013305 food Nutrition 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012858 packaging process Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000005033 polyvinylidene chloride Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013039 cover film Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 235000013580 sausages Nutrition 0.000 description 1
- 229920006300 shrink film Polymers 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 238000009461 vacuum packaging Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
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
- B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
- B65B11/50—Enclosing articles, or quantities of material, by disposing contents between two sheets, e.g. pocketed sheets, and securing their opposed free margins
-
- 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
- B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
Definitions
- the present invention relates to methods and devices for the production of Packings, preferably gastight packaging, by placing a product between a thermoformed upper roll and, if necessary, a thermoformed lower film packed while changing the shape of the top film and sealing the two films becomes.
- the object of the present invention was therefore to make sealed packs Manufacture thermoplastic material with an optically perfect appearance, whereby also packaging products with dimensions above the sealing level can be easily packed and films of any kind as cover material can be used.
- this is achieved by providing methods for producing Packs by placing a product between a thermoplastic top sheet and Bottom film is preferably sealed gas-tight under protective gas, the Top film by heating and bringing it into contact with a hollow mold Cover deformed, the cover positioned on the respective Packing unit with, if necessary, a tray that carries the product Bottom film brought together before sealing the packing unit Cover shrinkage by controlled heating only up to one Clamping set without touching the product or under simultaneous Warm the cover of the pressure in the pack if necessary by replacing it shielding gas used to at least the ambient pressure plus weight of the film per unit area and the packing unit is sealed.
- Another object of the present invention is a packaging machine with means for a separate feed, one roll each, one Bottom film on which the product to be packaged is placed and an upper film, those in a molding station, with a mold cavity open at the bottom is equipped with means for heating and pulling up the film, with a drive for the gradual advance of the bottom and top film and for Positioning the deformed top film over the product to form a packaging unit, with means for controlled heating of the deformed top film in the sealing station, Means for the controlled setting of an internal pressure of the pack before Seal the packing unit with the sealing tool and with sealing tools.
- the method according to the invention is preferably based on a continuously running packaging machine (1).
- the Upper film (2) in a forming station (3) by heating and pulling it into one Large number of covers (4) open at the bottom deformed.
- the bottom film (5) is withdrawn from a supply roll (6), through in a further forming station (7) Deep drawing into a variety of contiguous, open top Packing trays (8) deformed.
- These packing troughs come with the product filled and in front of the sealing station (10) with a positioning device that is not is shown, positioned to a pack unit with the cover (4) and on the overlapping edges sealed together. After sealing in the Sealing station (10) are the packs by appropriate cutting device, not shown, isolated.
- the top film is according to the dimensions of the packing material is deformed into covers by the film preferably heat radiation and / or contact heating and pulling in or Pressing into a hollow mold, which preferably with evacuation devices for Pulling in or compressed air is equipped to press in the film becomes.
- This cover preferably remains in its dimensions after leaving the Forming station stable until the sealing process.
- the shrinkage force is in the forming station the top film, which in the production of packaging according to the invention without Pressure adjustment of the internal pressure of the package when sealing is necessary, set.
- This shrinkage force is determined according to DIN 53369 and is a common one Size for characterizing foils under the influence of heat shrink.
- a top film pretreated in this way is then in the sealing station as soon as the cover with the bottom film carrying the product, which preferably forms a Trough is deformed, positioned to a packing unit, heated in a controlled manner.
- the temperature for sealing and the temperature for shrinking separated by the installation of cooling, insulation and heating elements are checked.
- the different temperatures can be queried by sensors.
- the The machine's control system then adjusts the temperature value.
- the Sealing temperatures are preferably in the range from 80 to 180 ° C.
- the Temperature in the rest of the sealing tool, d. H. the shrink temperature can be controlled separately from this value and preferably up to ⁇ 30 ° C Need differ.
- Free linear shrinkage in vertical or horizontal direction in% S% [(D 0 -D 1 ) / D 0 ] x100 where D 0 is the original length in one direction and D 1 is the length in the same direction after shrinkage.
- the shrinkage force of the top film becomes during the deformation Cover by appropriate stretching in the softening area of the Foil material adjusted so that the free shrinkage at the sealing temperature is at least 10%, preferably up to 60%.
- the upper film preformed as a cover after their positioning to a respective packaging unit with the, if applicable, to a Deformed bottom film in the tray carrying the product to be packaged Sealing station to heat and at the same time the pressure by supplying air or Shielding gas, which is already inside the packing unit in the usual way has been exchanged for air so that the internal pressure is at least corresponds to the ambient pressure plus the weight of the film per unit area.
- the packaging unit can be sealed practically synchronously.
- the upper film deformed into a cover is heated by the radiation heat and / or convection heat released during heat sealing and if necessary additionally by heat radiating elements.
- the top film increases its flexibility and the pressure inside the packaging unit can preferably be set so that the covering and with the edges the upper film, which is preferably deformed into a trough, is sealed packaged good not touched at its highest point, even if the dimensions of these packaging goods are such that they protrude beyond the sealing level.
- the pressure is preferably set such that at least when packaging Products that protrude the top film above the sealing level and sealed at the sealing edges, tight, d. H. Wrinkle-free, is present. Most notably preferably the pressure inside the pack is always set so that the The upper film is arched and sealed to the lower film is present.
- the exchange of air in the package inside against an inert gas filling is preferably carried out at perishable foodstuffs, wherein in fresh meat filling a CO 2 / O 2 gas mixture, in other foods, such.
- MAP packages Modified Atmosphered Packaging
- the method according to the invention is preferably used designed packaging trays used, at least in their floor area have at least one curvature.
- Figure 2 shows a pack (12) with a trough (8), the bottom of which is outward has arched curvatures (13).
- These bulges can be used to change the volume and thus change the pressure be pressed at the top.
- bulges in the packaging troughs can be used in their Design can be changed once the pack is at ambient temperature has cooled and / or there is a pressure drop inside due to the storage of the pack the pack is to be expected. So that the inner volume of the pack and thus the pressure is changed so that the top film is smooth, optically perfect Keeps appearance. It also touches the packaged product prevented, which can otherwise increase its perishability.
- the packaging tray shown in Figure 3 shows the state of the Packaging tray after sealing and readjusting the pressure by the Bulges in the bottom of the packaging tray are curved inwards. Until after sealing the pack can cause the dents to face down remain, so that if necessary, as explained above, by deforming the bulges the volume is reduced internally and the gas pressure changes again leads to a wrinkle-free, optically perfect appearance of the top film.
- the necessary changes in the curvature of the curvatures can be done by mechanical action are made, preferably after Packaging process in the packaging machine.
- packaging trays designed in this way is preferably only used in such Packs selected that are intended for longer storage, products packed containing, which can absorb gas during storage and / or Top films are used, which have a small dimensional change, preferably in the form of shrinkage with decreasing temperature.
- top films and bottom films used are preferred unstretched films, such as are usually used for the production of sealed packs a top and bottom film can be used.
- So-called hard foils are used in particular as sub-foils due to their mechanical stability for the production of packaging trays excellent through deep drawing. These are especially polyester, Polystyrene, polyamide or polypropylene films, preferably foamed, as exemplified in EP-A-0 570 221, in EP-A-0 520 028, WO / 42029 are described. The corresponding disclosures from these references are hereby introduced as a disclosure of the present application.
- Both hard foils and soft foils can be used as top foils with a Bottom sheet identical or different structure are used.
- these are films made of polypropylene, polyester or polyamide, preferably with a multilayer structure. Point to seal with the bottom film these top foils preferably have a sealing layer that seals in Temperature range from 80 ° C to 180 ° C allowed.
- These top foils preferably have a sealing layer that seals in Temperature range from 80 ° C to 180 ° C allowed.
- These top foils preferably have a sealing layer that seals in Temperature range from 80 ° C to 180 ° C allowed.
- These are very particularly preferred thereby transparent films with the basic structure Polyamide / polyethylene vinyl alcohol / polyethylene or Polystyrene / polyethylene vinyl alcohol / polyethylene or Polyester terephthalate / polyvinylidene chloride / polyethylene.
- the layer serves Polyethylene vinyl alcohol or polyvinylidene chloride as a barrier layer to one Avoid gas exchange with the environment.
- the bottom film can also preferably have a multilayer structure, wherein this multilayer structure preferably also comprises a gas barrier layer to largely prevent gas exchange with the environment.
- the manufacturing processes for both the lower films and the upper films are known and are preferably carried out by extruding or coextruding at one Multi-layer construction, on casting rolls, on which the foils cool down. You get the so-called cast foils.
- the thickness of the lower film is preferably in the range of 70 to 1500 ⁇ m, around one to have sufficient dimensional stability even after deep-drawing into hollows. So-called stable foils with sufficient are therefore preferred Intrinsic stability as lower foils for the production of the packs according to the invention used.
- the upper films are preferably thinner than the lower films, their thickness in Range from 10 to 350 microns, preferably 50 to 250 microns
- the process according to the invention is preferably carried out continuously on filling and molding Seal packaging machines performed.
- the packaging machine according to the invention preferably also has a second one Forming station to form troughs from the bottom film, and means for producing of bulges at least in the bottom of these hollows.
- the method according to the invention is suitable for packaging goods of all kinds, especially of goods with complicated dimensions, particularly preferred those that protrude beyond the sealing level.
- foods preferably perishable food, such as fresh meat with or without leg, poultry, cheese or cold cuts.
- the present invention therefore also relates to packs especially with food as packaging, available after Method according to the invention using the device according to the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
- Packages (AREA)
- Vacuum Packaging (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1998124976 DE19824976A1 (de) | 1998-06-04 | 1998-06-04 | Verfahren und Vorrichtung zum Herstellen von Packungen |
| DE19824976 | 1998-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0962388A1 true EP0962388A1 (fr) | 1999-12-08 |
Family
ID=7869894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99109574A Withdrawn EP0962388A1 (fr) | 1998-06-04 | 1999-05-14 | Procédé et machine pour fabriquer des emballages |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0962388A1 (fr) |
| DE (1) | DE19824976A1 (fr) |
| ES (1) | ES2141699T1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2384982B1 (fr) | 2010-05-07 | 2016-07-06 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Procédé destiné au fonctionnement d'une machine d'emballage thermoformé et machine correspondante |
| EP3168032A1 (fr) | 2015-11-13 | 2017-05-17 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Dispositif et procédé d'assemblage |
| EP3202673B1 (fr) | 2016-02-03 | 2018-09-12 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Machine d'emballage par emboutissage |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10023590A1 (de) * | 2000-05-13 | 2001-11-15 | Bosch Gmbh Robert | Verfahren und Vorrichtung zum Herstellen von Blisterbahnen |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1307054A (en) | 1970-10-23 | 1973-02-14 | Grace W R & Co | Vacuum packaging products in flexible materials |
| DE2205630A1 (de) * | 1972-02-07 | 1974-08-29 | Alkor Oerlikon Plastic Gmbh | Verfahren zur herstellung einer packung |
| FR2255218A1 (fr) * | 1973-12-24 | 1975-07-18 | Multivac Haggenmueller Kg | |
| US4958480A (en) * | 1988-10-07 | 1990-09-25 | W. R. Grace & Co.-Conn. | High profile shrink package |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3492773A (en) * | 1967-01-25 | 1970-02-03 | Anderson Bros Mfg Co | Method of vacuum packaging |
| US3805486A (en) * | 1972-05-31 | 1974-04-23 | Mahaffy & Harder Eng Co | Packaging apparatus and techniques |
| DE2337730A1 (de) * | 1973-07-25 | 1975-02-13 | Kraemer Und Grebe Kg Maschinen | Verpackungsmaschine |
| US4349999A (en) * | 1979-07-09 | 1982-09-21 | Mahaffy & Harder Engineering Co. | Packaging techniques for semi-rigid packages |
| DE2930963C2 (de) * | 1979-07-31 | 1984-01-12 | Krämer & Grebe GmbH & Co KG Maschinen- und Modellfabrik, 3560 Biedenkopf | Verpackungsvorrichtung |
| AU630589B2 (en) * | 1986-08-04 | 1992-11-05 | Seawell Corporation N.V. | Packaging |
| EP0302937B1 (fr) * | 1987-01-16 | 1994-04-20 | Toyo Seikan Kaisha, Ltd. | production d'un recipient a fermeture etanche |
| US5428943A (en) * | 1988-09-14 | 1995-07-04 | Kal Kan Foods, Inc. | Method of filling and sealing a deformable container |
| US5116881A (en) * | 1990-03-14 | 1992-05-26 | James River Corporation Of Virginia | Polypropylene foam sheets |
| NZ245868A (en) * | 1992-05-13 | 1995-12-21 | Grace W R & Co | Producing foam sheet from polypropylene with long chain branching or from rubber modified linear polypropylene by injection of carbon dioxide into melt, and extruding |
| DE19618111A1 (de) * | 1996-05-06 | 1997-11-13 | Tetra Laval Holdings & Finance | Transparente, siegelbare Mehrschichtenbarrierefolien |
-
1998
- 1998-06-04 DE DE1998124976 patent/DE19824976A1/de not_active Withdrawn
-
1999
- 1999-05-14 EP EP99109574A patent/EP0962388A1/fr not_active Withdrawn
- 1999-05-14 ES ES99109574T patent/ES2141699T1/es active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1307054A (en) | 1970-10-23 | 1973-02-14 | Grace W R & Co | Vacuum packaging products in flexible materials |
| DE2205630A1 (de) * | 1972-02-07 | 1974-08-29 | Alkor Oerlikon Plastic Gmbh | Verfahren zur herstellung einer packung |
| FR2255218A1 (fr) * | 1973-12-24 | 1975-07-18 | Multivac Haggenmueller Kg | |
| US4958480A (en) * | 1988-10-07 | 1990-09-25 | W. R. Grace & Co.-Conn. | High profile shrink package |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2384982B1 (fr) | 2010-05-07 | 2016-07-06 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Procédé destiné au fonctionnement d'une machine d'emballage thermoformé et machine correspondante |
| EP3168032A1 (fr) | 2015-11-13 | 2017-05-17 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Dispositif et procédé d'assemblage |
| EP3202673B1 (fr) | 2016-02-03 | 2018-09-12 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Machine d'emballage par emboutissage |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2141699T1 (es) | 2000-04-01 |
| DE19824976A1 (de) | 1999-12-09 |
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