EP0030649A2 - Procédé pour la fabrication de couvercles en tôle pour récipients, notamment des boîtes - Google Patents

Procédé pour la fabrication de couvercles en tôle pour récipients, notamment des boîtes Download PDF

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Publication number
EP0030649A2
EP0030649A2 EP80107289A EP80107289A EP0030649A2 EP 0030649 A2 EP0030649 A2 EP 0030649A2 EP 80107289 A EP80107289 A EP 80107289A EP 80107289 A EP80107289 A EP 80107289A EP 0030649 A2 EP0030649 A2 EP 0030649A2
Authority
EP
European Patent Office
Prior art keywords
sheet
sheet metal
punched
edges
strip
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
Application number
EP80107289A
Other languages
German (de)
English (en)
Other versions
EP0030649A3 (en
EP0030649B1 (fr
Inventor
Helmuth Supik
Hans-Jürgen Schlinsog
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.)
Ardagh Metal Packaging Germany GmbH
Original Assignee
Schmalback Lubeca AG
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 Schmalback Lubeca AG filed Critical Schmalback Lubeca AG
Priority to AT80107289T priority Critical patent/ATE7866T1/de
Publication of EP0030649A2 publication Critical patent/EP0030649A2/fr
Publication of EP0030649A3 publication Critical patent/EP0030649A3/de
Application granted granted Critical
Publication of EP0030649B1 publication Critical patent/EP0030649B1/fr
Expired legal-status Critical Current

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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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/06—Making more than one part out of the same blank; Scrapless working
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/501—Flexible tape or foil-like material
    • B65D17/502—Flexible tape or foil-like material applied to the external part of the container wall only
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/001—Action for opening container
    • B65D2517/0013—Action for opening container pull-out tear panel, e.g. by means of a tear-tab
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/0089—Unusual details
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0091—Means for venting upon initial opening
    • B65D2517/0094—Means for venting upon initial opening formed as a separate opening
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/504—Details of preformed openings
    • B65D2517/5059—Details of preformed openings provided with a plurality of openings

Definitions

  • the invention relates to a method for producing lids from sheet metal, in particular iron or steel sheet for containers, in particular cans, in which lid blanks are punched out from a sheet-like or band-shaped sheet metal, with a pouring area, preferably in the form of a plurality of punched-out openings which are close together , provided, molded and provided with a corrosion-preventing protective layer, whereupon a flexible sealing strip is applied to the lid surface by gluing or heat sealing for hermetically sealing the opening area.
  • Lids of the type on which the method is based are known, for example, from US Pat. No. 3,292,828 or DE-AS 25 19 709.
  • lids are also possible in which only a single removal and / or ventilation opening is punched into the lid.
  • the edge of the burr that arises when the holes are punched gives rise to considerable difficulties, above all because the edge leads to injuries or leaks or corroded in cooperation with the filling material and may give rise to the filling material becoming unusable.
  • a correspondingly thick layer of lacquer has been applied to the side of the cover sheet on which the stamped burrs lie, in which the stamped burr is embedded.
  • the punching ridge is removed from the holes by an electrochemical treatment of the sheet.
  • the opening edges can also be chamfered or rounded on both surface sides of the sheet.
  • the removal of the punch burr reliably prevents the formation of corrosion in the area of the opening edges.
  • the rounding of the opening edges, in particular on the side opposite the punching ridge facilitates the reliable and hermetic application of the flexible sealing strip and prevents the opening edge from cutting into the material of the sealing strip when the sealing strip is applied and extreme stress, thus weakening the sealing strip to an undesired extent.
  • the hole pattern is already punched into the sheet-like or band-shaped sheet, that is to say before the individual blank cover pieces are punched out.
  • the protective layer is applied to the sheet, in particular by tinning or chrome plating.
  • the cover 1 shown in plan view in FIG. 1 has in the cover mirror 5 a group of closely spaced openings 2 forming a hole pattern and at a distance from these two further openings 3.
  • the openings of the hole pattern 2 form the pouring area, while the openings 3 serve to ventilate the interior of the container while the contents of the container are being poured out.
  • the lid has in the usual way a lid edge 6, which can be connected to the edge of a container body, for example by folding.
  • a band-shaped tear-open element 4 for the hermetic sealing of both the pouring area and the ventilation opening, a band-shaped tear-open element 4, indicated by dashed lines, made of flexible material is used, which can be hermetically sealed by gluing or heat sealing to the surface of the lid mirror 5 and can be detached from the lid mirror as far as possible by at least partially tearing it open. that the pre-punched openings are exposed.
  • the hole pattern can also consist of only a single removal or pouring opening and / or ventilation opening.
  • the lids are made from sheet or ribbon-shaped sheet metal.
  • the cover blanks can first be punched out of the sheet metal and then provided with the hole pattern and further processed.
  • the perforated pattern for the pouring area and for the ventilation openings is preferably punched into the sheet or strip-shaped material in such a distributed manner that in a later process step the lid blanks or intermediate products can be punched out in transverse strip strips from the material prepared in this way.
  • the starting material is aluminum sheet, but in particular iron or steel sheet of suitable and customary qualities for the production of lids.
  • the openings are created by punching from one top of the sheet. As shown in FIG. 2 on a larger scale, a relatively sharp edge 12 is formed on the penetration side of the punching tool and a punching ridge 13 on the exit side of the opening 11, which protrudes considerably beyond the underside of the sheet.
  • a protective layer is applied to the sheet, the punching ridge is also covered by the protective layer. Due to the sharp edges of the ridge, a sufficiently thick formation of the protective layer is not possible in this area, so that there is always the risk that, in cooperation with the contents of the closed container, exposed or exposed areas of the iron or steel sheet with a progressively spreading point Corrosion begins, which changes the taste or color of the contents or makes the contents unpalatable.
  • the purpose of the new method is that the opening edges 22 and 23 of the sheet 20 are deburred.
  • the edge 13 removed according to FIG. 2, but in this area and in the leading edge 22 of the opening 21 the edge itself is chamfered or rounded off, so that there is a smooth surface transition from the upper sides of the sheet 2 to the peripheral wall of the opening 21 .
  • the preferred way of producing the cover according to FIG. 1 with opening edges 22 and 23 according to FIG. 3 is that the sheet metal strip 30, for example unwound from a coil, moves from left to right according to arrow 31 in FIG.
  • the raw sheet or black sheet is first provided with the opening pattern 33 responsible for the pouring area and ventilation by punching. This takes place in the punching station 32 indicated by the arrow.
  • the dashed circles 36 merely indicate the punching edge along which the sheet metal blanks for the covers are punched out of the sheet metal strip 30 at a later time.
  • the sheet metal strip 30 runs through a station 34, in which the sheet metal is cleaned electrochemically.
  • the setting of the electrochemical bath is related with the dwell time such that the ridge 13 as well as the sharp edge regions of the edges of the holes are simultaneously removed analytically by the electrical current in order to achieve an edge formation corresponding to the edges 22, 23 of FIG. 3.
  • the metal sheet After leaving the cleaning station 34, the metal sheet passes through a coating station 35.
  • the sheet metal is preferably tinned or chrome-plated.
  • the sheet treated in this way then passes into a separating station 37, in which either the individual sheet rounds 36 are punched out of the sheet or transverse sheet strips are cut off with a series of sheet rounds, which are then individually separated and treated further.
  • the deburring according to the invention is carried out by an increased current attack on the punched edges.
  • the parameter of the current strength depends on the size of the punch burr to be removed, which is mechanically scanned and the values of which are entered in an electronic current control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Laminated Bodies (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Closures For Containers (AREA)
EP80107289A 1979-12-13 1980-11-22 Procédé pour la fabrication de couvercles en tôle pour récipients, notamment des boîtes Expired EP0030649B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80107289T ATE7866T1 (de) 1979-12-13 1980-11-22 Verfahren zum herstellen von deckeln aus blech fuer behaelter, insb. dosen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2950214 1979-12-13
DE2950214A DE2950214C2 (de) 1979-12-13 1979-12-13 Verfahren zum kontinuierlichen Herstellen von Deckeln aus Blech für Dosen

Publications (3)

Publication Number Publication Date
EP0030649A2 true EP0030649A2 (fr) 1981-06-24
EP0030649A3 EP0030649A3 (en) 1981-12-23
EP0030649B1 EP0030649B1 (fr) 1984-06-13

Family

ID=6088408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107289A Expired EP0030649B1 (fr) 1979-12-13 1980-11-22 Procédé pour la fabrication de couvercles en tôle pour récipients, notamment des boîtes

Country Status (5)

Country Link
US (1) US4309951A (fr)
EP (1) EP0030649B1 (fr)
AT (1) ATE7866T1 (fr)
CA (1) CA1159719A (fr)
DE (1) DE2950214C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003474A1 (fr) * 1984-12-13 1986-06-19 Metal Box Public Limited Company Recipients
WO2013068594A1 (fr) * 2011-11-10 2013-05-16 Ball Europe Gmbh Élément frontal pour contenant

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8549740B1 (en) * 2008-06-05 2013-10-08 Innosys, Inc Method of manufacturing a folded waveguide
US20170013933A1 (en) * 2015-07-14 2017-01-19 Heba Designs, LLC dba GO-Comb Wallet-sized comb

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3292828A (en) * 1964-09-17 1966-12-20 Nat Can Corp Easy opening can end
US3380622A (en) * 1966-12-15 1968-04-30 Procter & Gamble Method and material for hermetically sealing containers
DE1765890B1 (de) * 1968-08-01 1972-03-09 Wendt Kg Fritz Verfahren zum Elysieren,insbesondere Entgraten von Werkstuecken ohne Vorschubbewegung zwischen Elektrode und Werkstueck
US3759206A (en) * 1970-09-16 1973-09-18 Broken Hill Pty Co Ltd Push-in easy-opening closures
US3888199A (en) * 1973-12-03 1975-06-10 Coors Container Co Method of making a press tab container end from a metallic web
DE2519709A1 (de) * 1974-09-18 1976-04-08 Continental Can Co Deckel, insbesondere aus metall, fuer dosen zum verpacken von gasentwickelnden getraenken

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2122463A (en) * 1936-03-27 1938-07-05 Bell Telephone Labor Inc Method of enameling wire
US2382549A (en) * 1943-11-26 1945-08-14 Ncr Co Electrolytic smoothing of metals
US2479302A (en) * 1945-10-11 1949-08-16 Gen Electric Method of electropolishing laminated magnetic cores
US2725352A (en) * 1950-07-21 1955-11-29 Western Electric Co Methods of and apparatus for dissolving surface projections, electropolishing and passivating metallic tapes
US3281024A (en) * 1964-05-20 1966-10-25 Continental Can Co Easy opening container end and closure member therefor
CA943479A (en) * 1968-08-05 1974-03-12 Continental Can Company Separable molded article
US3691654A (en) * 1969-05-29 1972-09-19 Gen Electric Metal foil lead manufacture
US4106422A (en) * 1977-03-14 1978-08-15 Buhrke Industries, Inc. Method for manufacture of can end closures

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3292828A (en) * 1964-09-17 1966-12-20 Nat Can Corp Easy opening can end
US3380622A (en) * 1966-12-15 1968-04-30 Procter & Gamble Method and material for hermetically sealing containers
DE1765890B1 (de) * 1968-08-01 1972-03-09 Wendt Kg Fritz Verfahren zum Elysieren,insbesondere Entgraten von Werkstuecken ohne Vorschubbewegung zwischen Elektrode und Werkstueck
US3759206A (en) * 1970-09-16 1973-09-18 Broken Hill Pty Co Ltd Push-in easy-opening closures
US3888199A (en) * 1973-12-03 1975-06-10 Coors Container Co Method of making a press tab container end from a metallic web
DE2519709A1 (de) * 1974-09-18 1976-04-08 Continental Can Co Deckel, insbesondere aus metall, fuer dosen zum verpacken von gasentwickelnden getraenken

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003474A1 (fr) * 1984-12-13 1986-06-19 Metal Box Public Limited Company Recipients
US4723391A (en) * 1984-12-13 1988-02-09 Metal Box Public Limited Company Containers
US4762246A (en) * 1984-12-13 1988-08-09 Metal Box Public Limited Company Containers
WO2013068594A1 (fr) * 2011-11-10 2013-05-16 Ball Europe Gmbh Élément frontal pour contenant

Also Published As

Publication number Publication date
US4309951A (en) 1982-01-12
DE2950214C2 (de) 1986-02-06
EP0030649A3 (en) 1981-12-23
DE2950214A1 (de) 1981-06-19
CA1159719A (fr) 1984-01-03
EP0030649B1 (fr) 1984-06-13
ATE7866T1 (de) 1984-06-15

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