EP0127837A2 - Procédé et dispositif pour la fabrication de lignes de déchirage à tôle métallique, en particulier pour la fabrication de couvercles de déchirage pour les boîtes ou récipients - Google Patents

Procédé et dispositif pour la fabrication de lignes de déchirage à tôle métallique, en particulier pour la fabrication de couvercles de déchirage pour les boîtes ou récipients Download PDF

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Publication number
EP0127837A2
EP0127837A2 EP84105832A EP84105832A EP0127837A2 EP 0127837 A2 EP0127837 A2 EP 0127837A2 EP 84105832 A EP84105832 A EP 84105832A EP 84105832 A EP84105832 A EP 84105832A EP 0127837 A2 EP0127837 A2 EP 0127837A2
Authority
EP
European Patent Office
Prior art keywords
embossing
scoring
tear
tool
line
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
EP84105832A
Other languages
German (de)
English (en)
Other versions
EP0127837B1 (fr
EP0127837A3 (en
Inventor
Hans-Joachim Pförtner
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 AT84105832T priority Critical patent/ATE31258T1/de
Publication of EP0127837A2 publication Critical patent/EP0127837A2/fr
Publication of EP0127837A3 publication Critical patent/EP0127837A3/de
Application granted granted Critical
Publication of EP0127837B1 publication Critical patent/EP0127837B1/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
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs

Definitions

  • the invention relates to a method for producing tear lines in metal sheets, in particular for producing tear-open lids for cans or similar containers, in which the sheet is placed on an anvil-like abutment and by depressing the embossing or scoring edge of a stamping tool corresponding to the course of the tear line a scribe line is generated at a predetermined penetration depth.
  • tear-open covers in which the cover plate can be torn partially or completely along a line of weakness determined by the tear line, preferably with the aid of a part arranged firmly on the tear-open part, such as a handle tab or the like .
  • the course of the weakening line corresponds to the outline of the tear part.
  • the line of weakness can be closed in itself, so that the tear-open section of the sheet is completely removed from the other sheet metal parts of the can when opened.
  • the tear line can also have an interruption point, e.g. serves to ensure that when the container is opened the tear-open part can be torn open to expose the opening, but is permanently connected to the can via the break point of the tear line.
  • the main purpose of this measure is to ensure that the tear-open part with its sharp tear-open edge, together with the empty container, reaches a waste collection point.
  • the tear-open part has a more complicated geometrical outline shape, the tear line running through relatively narrow radii of curvature.
  • such a tear line is produced with a uniform embossing tool in a single work step by means of embossing cracks.
  • the sheet is placed on the anvil part and the embossing tool is lowered so far that the embossing edge provided on the embossing tool and corresponding to the length and course of the scoring line has penetrated into the sheet metal to a predetermined depth of sheet thickness.
  • the method can advantageously be designed such that the two scribe lines intersect in the region of the apex of the angle.
  • a single scoring tool with only a limited length of the embossing line corresponding to the scoring line can be used and can be brought into effect in two or flour as two successive steps in mutually offset positions. Again in such a way that the individual scribe line sections overlap in the blecl when this appears to be indicated.
  • the invention provides an arrangement with an anvil-like abutment and an embossing tool which has an embossing or scoring edge, this arrangement being further developed according to the teaching of claim 3 according to the invention.
  • a single embossing tool can be provided with an embossing or scoring edge of limited length, which can be brought into effect on the sheet in predetermined, different positions and in a predetermined sequence, such that the two or more scoring lines become sharp at their connection points bump or cross at an angle.
  • the scoring or embossing edge of each part of the embossing tool can advantageously have an approximately circular arc-shaped course, the scoring or embossing edges of the parts of the embossing tool having a different radius of curvature.
  • the scribing tool is shown in a form for the purpose of explanation, as it basically corresponds to the scribing tool of the aforementioned German Laid-Open Specification 2 406 306.
  • the scoring tool is made in several parts.
  • Fig. 1 and 2 only part of the scribing or embossing tool is shown. This part is labeled 2.
  • the associated embossed edge is labeled 5 (see Fig. 2).
  • Fig. I a part of the anvil 3 is shown in cross section and in the cutout, on which the sheet 1 is placed before the embossing tool 2 is lowered.
  • the lowering takes place in relation to the anvil 3 to a predetermined approximation, which at the same time determines the depth of penetration of the embossed edge 5 into the sheet 1.
  • the embossed edge has two inclined flanks 6 9 which have two flats 7 and 8 located at different heights, which are connected to one another via an inclined shoulder.
  • the embossing tool has one .
  • Embossed edge 5 of only a limited length. This itself is not sufficient to delimit a tear or tear part. Rather, there are several stamping tool parts, each with a limited stamping edge according to. Fig. 2 required.
  • the essential thing is that these embossing tool parts are provided in a predetermined relative geometric arrangement with respect to one another and act on the sheet metal one after the other will. As a result, it is not only possible to produce a mutual acute course between adjacent sections of the scoring line, but above all to achieve that these scoring line sections intersect slightly at their connection points, as shown by various exemplary embodiments according to FIGS. 3-7.
  • the crossover size is exaggerated, since it is usually sufficient that the scoring line sections cross so far that a direct connection of the scoring lines to one another is reliably ensured.
  • the score lines can also butt against one another at the apex of the angle enclosed by them, as is shown at 19 in FIG. 5.
  • a composite scribe line 14 is provided in addition to a simple scribe line in a sheet.
  • This consists of the scribe line sections 15 and 16, both of which have an approximately circular arc shape, the arches, however, showing different radii of curvature.
  • the length and arrangement is such that the two scribe line sections 15 and 16 intersect slightly at the adjoining points 16 and 17.
  • a single embossing tool can also be provided for producing the scribe lines 11 to 13, which has an embossed edge for producing one of the scribe lines 11 to 13.
  • This embossing tool is arranged in such a way that it is brought into different positions one after the other and thus one after the other to produce the different scribe lines 11 up to 13 can be used.
  • a tear-open part is provided by two identical scoring lines in the form of a circular-purpose corner. Bumps 19 shown.
  • FIG. 25 Another geometrical shape of a tear-open area with four curved side edges 26 to 29 is shown at 25 in FIG.
  • the adjacent scribe line sections intersect at a sharp angle, the scribe lines preferably crossing at these points, as shown.
  • the new process is equally suitable for sheet metal of any kind, i.e. for aluminum sheet or steel sheet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Making Paper Articles (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Removal Of Water From Condensation And Defrosting (AREA)
EP84105832A 1983-06-01 1984-05-22 Procédé et dispositif pour la fabrication de lignes de déchirage à tôle métallique, en particulier pour la fabrication de couvercles de déchirage pour les boîtes ou récipients Expired EP0127837B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84105832T ATE31258T1 (de) 1983-06-01 1984-05-22 Verfahren und anordnung zum herstellen von aufreisslinien in metallblechen, insbesondere zur herstellung von aufreissdeckeln fuer dosen oder dgl. behaelter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3319949 1983-06-01
DE19833319949 DE3319949A1 (de) 1983-06-01 1983-06-01 Verfahren und anordnung zum herstellen von aufreisslinien in metallblechen, insb. zur herstellung von aufreissdeckeln fuer dosen oder dgl. behaelter

Publications (3)

Publication Number Publication Date
EP0127837A2 true EP0127837A2 (fr) 1984-12-12
EP0127837A3 EP0127837A3 (en) 1985-05-29
EP0127837B1 EP0127837B1 (fr) 1987-12-09

Family

ID=6200482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84105832A Expired EP0127837B1 (fr) 1983-06-01 1984-05-22 Procédé et dispositif pour la fabrication de lignes de déchirage à tôle métallique, en particulier pour la fabrication de couvercles de déchirage pour les boîtes ou récipients

Country Status (6)

Country Link
EP (1) EP0127837B1 (fr)
AT (1) ATE31258T1 (fr)
DE (2) DE3319949A1 (fr)
DK (1) DK270484A (fr)
ES (1) ES291996Y (fr)
NO (1) NO159705C (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3227304A (en) * 1964-09-08 1966-01-04 Charles T Ashury Can opening arrangement
US3355058A (en) * 1965-12-06 1967-11-28 Charles T Asbury Push-in can lid
US3359773A (en) * 1964-03-03 1967-12-26 Metal Box Co Ltd Scoring of thin sheet metal
DE2051697A1 (de) * 1969-10-23 1971-05-06 Aluminum Co of America, Pittsburgh, Pa (V St A) Verfahren und Vorrichtung zum Ein kerben von Metallbehalterenden
DE2406306A1 (de) * 1973-06-18 1975-01-09 Continental Can Co Durch eine kerblinie vorgeschwaechter blechteil, insbesondere aufreissdeckel
DE2005568B2 (de) * 1970-02-06 1976-07-22 Rasselstein Ag, 5450 Neuwied Werkzeug zur herstellung von praegekerben

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3359773A (en) * 1964-03-03 1967-12-26 Metal Box Co Ltd Scoring of thin sheet metal
US3227304A (en) * 1964-09-08 1966-01-04 Charles T Ashury Can opening arrangement
US3355058A (en) * 1965-12-06 1967-11-28 Charles T Asbury Push-in can lid
DE2051697A1 (de) * 1969-10-23 1971-05-06 Aluminum Co of America, Pittsburgh, Pa (V St A) Verfahren und Vorrichtung zum Ein kerben von Metallbehalterenden
DE2005568B2 (de) * 1970-02-06 1976-07-22 Rasselstein Ag, 5450 Neuwied Werkzeug zur herstellung von praegekerben
DE2406306A1 (de) * 1973-06-18 1975-01-09 Continental Can Co Durch eine kerblinie vorgeschwaechter blechteil, insbesondere aufreissdeckel

Also Published As

Publication number Publication date
DE3467982D1 (en) 1988-01-21
NO159705C (no) 1989-02-01
ATE31258T1 (de) 1987-12-15
DE3319949A1 (de) 1984-12-06
DK270484D0 (da) 1984-05-30
NO842161L (no) 1984-12-03
EP0127837B1 (fr) 1987-12-09
NO159705B (no) 1988-10-24
ES291996Y (es) 1988-05-16
DK270484A (da) 1984-12-02
ES291996U (es) 1987-11-01
EP0127837A3 (en) 1985-05-29

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