EP0764116A1 - Verfahren zum herstellen einer metalldose, vorrichtung zur durchführung des verfahrens und nach diesem hergestellte metalldose - Google Patents
Verfahren zum herstellen einer metalldose, vorrichtung zur durchführung des verfahrens und nach diesem hergestellte metalldoseInfo
- Publication number
- EP0764116A1 EP0764116A1 EP95919302A EP95919302A EP0764116A1 EP 0764116 A1 EP0764116 A1 EP 0764116A1 EP 95919302 A EP95919302 A EP 95919302A EP 95919302 A EP95919302 A EP 95919302A EP 0764116 A1 EP0764116 A1 EP 0764116A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal
- film
- layer
- neck part
- adhesive
- 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- Withdrawn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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
- B21D51/44—Making closures, e.g. caps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
- B21D51/2615—Edge treatment of cans or tins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/34—Coverings or external coatings
- B65D25/36—Coverings or external coatings formed by applying sheet material
Definitions
- the invention relates to a method according to the preamble of claim 1.
- Spray cans in which the metal can is exposed to a certain internal pressure during use are primarily produced by such a method.
- Such cans are produced in a multi-stage process, in which an approximately disk-shaped blank is cold-shaped into a cylinder in a mold by a piston in the manner of a punching process, followed by any mold release agent, grease and other lubricants, chips, etc. is rinsed and cleaned by means of a cleaning agent and / or hot water in order to obtain a primer after being cut to length.
- the printing and subsequent drying in a second oven must take place. Since the printing substrate is the metal can itself, a relatively large amount of expensive material is lost as rejects until the respective printing corresponds to the wishes of the customer. The customer often has to be present because each interruption of the operation of the production line costs money. If you were to send samples first, the line would have to be freshly set - each time using complex cleaning processes. Only when the print has been approved can it be overpainted (again with special material adapted to the subsequent shaping process for the neck part) and then dried in a third oven, unless the customer had already done the overpainting . Thereafter, the upper neck part can be drawn in or the edge of the neck can be flanged in a further multi-stage process.
- the invention is therefore based on the object of improving a method of the type mentioned in the preamble of claim 1 in such a way that the production can be designed more cheaply with less reject costs. According to the invention, this is achieved by the characterizing features of claim 1.
- the neck part and the film can be deformed at the same time by adding heat during the shaping of the film, but this does not have to be the case. Rather, the film could only be clinged to after the neck part has been finished by subsequent heating.
- the advantages which can be achieved by the invention are obvious when the above list of the disadvantages inherent in the prior art is reviewed. First of all, it is not necessary to have all processes run immediately one after the other. This makes it possible to carry out the first deformation steps and, depending on the order situation ("just in time"), to apply the decor at a later point in time and with the respectively required pattern and text. This also eliminates the expense of waste, because the printed sheets can only be sent to the customer and glued to the cans after approval.
- the expression "adhesive bond” should be understood in the most general sense of "adherence”, for example also by welding.
- the foils can, if desired, also be obtained separately, for example from a conventionally equipped printing house, so that at least the requirements Reduce initial investments for such a can production considerably.
- modified vinyl compounds such as polyvinyl alcohol or vinyl copolymers with other additives which improve the toughness values, such as maleic anhydride (for example as a graft copolymer), urethane or styrene, will be expedient, as is the case, for example, in numerous applications Allied-Signal Inc. are described.
- Polyurethanes and copolymers thereof can also be used for the process according to the invention, as can polyolefins, such as polyethylene.
- a metal foil is used as the outer decorative layer
- an adhesive and here in particular a contact and / or a pressure adhesive, will be expedient, although spot welding or line welding would also be possible. Otherwise, ultrasonic welding is recommended, a process that is often used for the clean connection of container parts.
- a cylindrical metal die body with a diameter of 50 mm, a wall thickness of approximately 0.4 mm and a height of approximately 210 was made from a disc-shaped aluminum blank with a diameter of 50 mm and a height of 8 mm on a Herlan type cold press machine mm pressed in a conventional manner. The metal body was then cleaned inside and outside using metal brushes. The can body produced in this way was then cut to a length of 200 mm at its open edge. Afterwards, a number of identical can bodies were manufactured and stored.
- a rectangular foil commercially available in the packaging industry the dimensions of which correspond to the cylinder circumference of the metal can of example 1, made of aluminum, about 0.03 mm thick, was printed with a desired multicolored decor.
- Several such foils with different shades of color were made in order to be able to carry out a comparison.
- a number of these films with a uniform, desired coloring were then determined to match those produced in Example 1 Metalldo ⁇ e to be applied.
- the remaining foils gave a cost-insignificant imposition.
- the printing and color samples were selected on the spot, it is clear that the foils could have been dispatched to the customer without any problems, and that a presence of a customer at the production facility was not necessary under any circumstances.
- a mechanically cleaned (brushed) cylindrical metal can body of Example 1 was provided with a commercially available contact adhesive by means of an application roller customary in the label or printing industry with a raster of application recesses attached over the circumference of the roller, so that There was a grid of glue points over the circumference of the can. Thereafter, by inserting the film printed between the can and a laminating roller in accordance with the above description, the printed film was pressed cleanly onto the adhesive adhering to the outer periphery of the cylindrical can body. A protruding piece of film was cut off after the can circumference had been completely glued, so that the edges were butted against butt. This can was referred to as "can A".
- a second can body was provided with a film.
- the film was first provided with a similar application roller with a pressure-sensitive agent and then laminated onto the can body.
- the can thus provided with the decor was called "Do ⁇ e B".
- a lacquer was rolled onto the cans "A” and then dried in a conventional oven at about 180 ° C. with a slight vacuum.
- the surface of the cans "B” were untreated g * - la ⁇ en, but the film was here between the abutting edges, a small gap is provided, which is filled with paint.
- With the drying of the respective lacquer there was also a drying of the adhesives as well as an extraction of any residual solvent. The appearance of both cans was satisfactory and could hardly be distinguished from a conventional printed can.
- the length of the laminated foils was selected such that they left a narrow edge at the upper end, which was however dimensioned such that this foil edge was covered by the flanging when the edge of the can was flanged.
- the lower edge of the film was placed so close to the bottom of the can that when the bottom was arched against the inside of the can, the edge of the film was pulled against the bottom.
- the inside of the can was subjected to an anodizing treatment. This means that the can from the outside can hardly be distinguished from a conventional can coated up to the top.
- a can body according to Example 1 was covered with a synthetic resin film bearing a desired decoration in the manner indicated in Example 2 above.
- the synthetic resin film consisted of a plastic material of 0.025 mm, obtained from Hoech ⁇ t AG and identified as polyvinyl alcohol, with a higher elasticity than the aluminum material of the can. This was followed by overpainting and drying as in Example 2, whereupon the conification began.
- the can body was heated to approximately 120 ° C. and a thin film of polyethylene was thus welded on.
- a decorative carrier film of the same material was then laminated onto this binding layer by means of ultrasonic welding.
- this type of attachment also proved itself, but of course care had to be taken to ensure that the foils fit neatly on the nozzle body and against one another.
- conifying i.e. Narrowing of the neck parts, it was also shown that this film composite did relatively well with the narrowing and provided a clean and pleasing appearance.
- Example 4 was repeated, but instead of the polyvinyl alcohol film, one made from a polyurethane elastomer obtained from DuPont was used. According to the manufacturer's instructions, it was a copolymer that had been designed with good elasticity in mind. It was shown that good and satisfactory results could already be achieved here by applying the adhesive. such a material will generally be easier to process.
- Example 1 the can bodies according to Example 1 were covered with various other sheet material mentioned above and in the claims, the experience reproduced in Example 4 being confirmed to a lesser or greater extent.
- EXAMPLE 6 Application of a shrink film A plastic film, which is used in wine cellars for the application of a decor to bottles, and which shrinks under the influence of heat, was attached to a nozzle body according to Example 1. For this purpose, the film was wrapped around the nozzle body and exposed to a hot air flow of approximately 140 to 160 ° C. which was inflated by two nozzles. The film shrank tightly onto the cylindrical can body, the end edges still being tacked together by ultrasonic welding.
- the conifying took place, which differed from the procedure according to Example 3 in that the can was first heated to 80 ° C. and then the neck part was narrowed while further supplying heat from the outside. In order to achieve a uniform heat distribution around the neck, three but then four hot air nozzles were used, the temperature being varied from 120 ° to 180 ° C. The shrink film adhered well to the can, which was then flanged at the edge of the neck in such a way that the upper edge of the film was covered. Ultimately, the finished can was practically no different (with the exception of a matt gloss) from a conventionally produced can.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4420532 | 1994-06-14 | ||
DE19944420532 DE4420532A1 (de) | 1994-06-14 | 1994-06-14 | Verfahren zum Herstellen einer Metalldose, Vorrichtung zur Durchführung des Verfahrens und nach diesem hergestellte Metalldose |
PCT/CH1995/000130 WO1995034474A1 (de) | 1994-06-14 | 1995-06-06 | Verfahren zum herstellen einer metalldose, vorrichtung zur durchführung des verfahrens und nach diesem hergestellte metalldose |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0764116A1 true EP0764116A1 (de) | 1997-03-26 |
Family
ID=6520417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95919302A Withdrawn EP0764116A1 (de) | 1994-06-14 | 1995-06-06 | Verfahren zum herstellen einer metalldose, vorrichtung zur durchführung des verfahrens und nach diesem hergestellte metalldose |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0764116A1 (de) |
DE (1) | DE4420532A1 (de) |
WO (1) | WO1995034474A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1201331A1 (de) | 2000-09-27 | 2002-05-02 | Novocan AG | Verfahren zum Herstellen einer mit einer Dekorschicht versehenen Metalldose , Vorrichtung zur Durchführung dieses Verfahrens |
BRPI0506878A (pt) | 2004-01-15 | 2007-06-12 | Crebocan Ag | processo e dispositivo para fabricação de um corpo de lata, bem como corpo de lata |
DE102005015340B4 (de) | 2005-04-01 | 2011-11-17 | Jowat Ag | Verfahren zur Herstellung von mit einer Bedruckung oder einem Dekorversehenen Formkörpern und auf diese Weise hergestellte Formkörper |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1552022A1 (de) | 1961-01-12 | 1970-01-08 | Rudolf Lechner Kg | Verfahren zur Herstellung nahtloser Metallflaschen |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1189044B (de) * | 1961-01-12 | 1965-03-18 | Rudolf Lechner K G Tubenfabrik | Verfahren zur Herstellung nahtloser Metallflaschen |
GB1191051A (en) * | 1968-01-15 | 1970-05-06 | Andersen & Bruun Ltd | Improvements relating to Packaging Containers |
DE2433182A1 (de) * | 1974-07-10 | 1976-01-29 | American Can Co | Filmetikettierter metallbehaelter sowie verfahren zu dessen herstellung |
AT367555B (de) * | 1979-02-26 | 1982-07-12 | Teich Ag Folienwalzwerk | Dosenueberzug |
DE3445139A1 (de) * | 1984-12-11 | 1986-06-12 | Herlan & Co Maschinenfabrik GmbH, 7500 Karlsruhe | Vorrichtung zum formen des bodens von dosen oder dergleichen |
GB8625565D0 (en) * | 1986-10-25 | 1986-11-26 | Ultramark Adhesive Products Lt | Labels for canisters |
DE4125172A1 (de) * | 1991-07-30 | 1993-02-04 | Hoechst Ag | Schrumpfbare flaschenkapsel aus mehrlagiger kunststoffolie und verfahren zu ihrer herstellung |
-
1994
- 1994-06-14 DE DE19944420532 patent/DE4420532A1/de not_active Withdrawn
-
1995
- 1995-06-06 WO PCT/CH1995/000130 patent/WO1995034474A1/de not_active Application Discontinuation
- 1995-06-06 EP EP95919302A patent/EP0764116A1/de not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1552022A1 (de) | 1961-01-12 | 1970-01-08 | Rudolf Lechner Kg | Verfahren zur Herstellung nahtloser Metallflaschen |
Non-Patent Citations (1)
Title |
---|
See also references of WO9534474A1 |
Also Published As
Publication number | Publication date |
---|---|
WO1995034474A1 (de) | 1995-12-21 |
DE4420532A1 (de) | 1996-01-04 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 19961127 |
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AK | Designated contracting states |
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17Q | First examination report despatched |
Effective date: 19970923 |
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GRAG | Despatch of communication of intention to grant |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOVOCAN GMBH |
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STAA | Information on the status of an ep patent application or granted ep patent |
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18W | Application withdrawn |
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