EP0592267B1 - Emballage métallique à ouverture par rupture d'une ligne de moindre résistance et tÔle d'acier pour cet emballage - Google Patents

Emballage métallique à ouverture par rupture d'une ligne de moindre résistance et tÔle d'acier pour cet emballage Download PDF

Info

Publication number
EP0592267B1
EP0592267B1 EP93402311A EP93402311A EP0592267B1 EP 0592267 B1 EP0592267 B1 EP 0592267B1 EP 93402311 A EP93402311 A EP 93402311A EP 93402311 A EP93402311 A EP 93402311A EP 0592267 B1 EP0592267 B1 EP 0592267B1
Authority
EP
European Patent Office
Prior art keywords
steel
sheet
content
ratio
weight
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.)
Expired - Lifetime
Application number
EP93402311A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0592267A1 (fr
Inventor
Daniel Lafontaine
Jean-François Seconde
Patrick Zimmer
Michel Entringer
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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 Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0592267A1 publication Critical patent/EP0592267A1/fr
Application granted granted Critical
Publication of EP0592267B1 publication Critical patent/EP0592267B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60

Definitions

  • the present invention relates to packaging of opening type by breaking a line of least resistance so-called easy opening box.
  • They have a cover in which is arranged a line of least resistance, for example a incision, delimiting an opening panel.
  • An actuating ring is fixed on the panel opening using a rivet.
  • the opening is caused by an effort of traction on the actuation ring so as to break the metal at the incision, the opening panel possibly including a connection zone with the cover so as not to detach completely from this latest.
  • a sheet made up When made from steel, for reduce their cost, a sheet made up is commonly used standard low carbon steel, annealed continuous at approximately 680 ° C and tinned.
  • the steel used for the realization of such packaging must allow on the one hand to form the rivet of fixing the opening ring and, on the other hand, a breaking of the line of least resistance easily without having to exert too much effort.
  • the breaking load Rm must not be too high because otherwise the opening effort to be exerted to break the line of least resistance will have to be important.
  • the yield strength Re is approximately 415 MPa and the breaking load Rm of around 430 MPa results in a Re / Rm ratio of the order of 0.96.
  • An easy opening lid made with a such steel has a high opening force, due the value of Rm and a residual thickness at the level relatively large incision.
  • the yield point is important, which causes the formation of worms visible when the packaging is stamped, detrimental to the aesthetic appearance of the latter.
  • the invention aims to provide an opening type package by breaking a line of least resistance, for which the overall effort required for opening is reduced, while having an improved appearance after stamping packaging, and good training ability rivet.
  • the invention relates to packaging metallic type of opening by rupture of a line of least resistance arranged in a part of sheet steel wall, characterized in that steel constituting the sheet has a carbon content of between 0.02 and 0.08% by weight and a boron content included between 0.002 and 0.004% by weight, the steel also containing of nitrogen, the ratio of boron content to nitrogen content being greater than 0.8, the remainder being iron and residual impurities, said sheet being subjected to continuous rolling followed by annealing on base carried out for 8 to 10 hours at a temperature between 550 and 650 ° C approximately, then subjected to a cold re-rolling with an elongation rate included between 5 and 10%.
  • the invention also relates to a sheet steel intended for making a packaging and characterized in that the ratio of its elastic limit on its breaking load is between 0.87 and 0.96, preferably between 0.91 and 0.92.
  • Reducing the effort required to open involves the use of a steel with a limit relatively low elasticity, which further facilitates the winding of the opening panel after breaking of the incision, and by a high Re / Rm ratio.
  • the appearance of the packaging and its resistance corrosion are improved by the use of a sheet having an equiaxed fine-grained structure and not exhibiting no yield strength plateau.
  • the packaging according to the invention is made from a steel sheet of which the carbon content is between 0.02 and 0.08% by weight and boron content is 0.002 and 0.004% by weight, the steel also containing nitrogen in a amount less than 0.005%, the ratio of the content of boron on the nitrogen content being greater than 0.8.
  • a carbon content of less than 0.02% is difficult to achieve with production processes conventional and can lead to mechanical resistance insufficient cover.
  • the ratio of the boron content on the nitrogen content must be greater than 0.8, boron being limited to 0.004% because, for a higher content, has an increase in the mechanical characteristics of the sheet metal and we see a preferential oxidation appear in side of the product, which is unacceptable from the point of view aesthetic.
  • the process used to make the suitable sheet for packaging according to the invention consists in that after continuous rolling of the steel described above, the sheet is subjected to an annealing on base carried out during 8 at 10 a.m. at a temperature between 550 and 650 ° C approximately, the rise in temperature from the temperature ambient being carried out in approximately 20 hours. The sheet is then subjected to a cold re-rolling with a rate elongation between 5 and 10%.
  • the ratio of the elastic limit to the breaking load is between 0.91 and 0.92.
  • the remaining thickness at the bottom of the incision should not not be less than 70 microns under penalty of damage unacceptable, while this remaining thickness in bottom of incision can go down to 50 microns in the case of the steel according to the invention.
  • This packaging made from a sheet metal fine-grained equiaxed structure avoids, during training of the rivet, the appearance of deformation roughness due to subsidence, which is detrimental to the appearance of the packaging and the holding of any varnish.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Heat Treatment Of Steel (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
  • Cartons (AREA)
EP93402311A 1992-10-05 1993-09-21 Emballage métallique à ouverture par rupture d'une ligne de moindre résistance et tÔle d'acier pour cet emballage Expired - Lifetime EP0592267B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9211788 1992-10-05
FR9211788A FR2696421B1 (fr) 1992-10-05 1992-10-05 Acier pour emballage à ouverture par rupture d'une ligne de moindre résistance.

Publications (2)

Publication Number Publication Date
EP0592267A1 EP0592267A1 (fr) 1994-04-13
EP0592267B1 true EP0592267B1 (fr) 1998-06-24

Family

ID=9434156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93402311A Expired - Lifetime EP0592267B1 (fr) 1992-10-05 1993-09-21 Emballage métallique à ouverture par rupture d'une ligne de moindre résistance et tÔle d'acier pour cet emballage

Country Status (6)

Country Link
EP (1) EP0592267B1 (ja)
JP (1) JP3304173B2 (ja)
AT (1) ATE167704T1 (ja)
DE (1) DE69319292T2 (ja)
ES (1) ES2118918T3 (ja)
FR (1) FR2696421B1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1003762C2 (nl) * 1996-08-08 1998-03-04 Hoogovens Staal Bv Staalsoort, staalband en werkwijze ter vervaardiging daarvan.
CA2357663A1 (en) * 1998-12-30 2000-07-13 Hille & Muller Gmbh Steel band with good forming properties and method for producing same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725143A (en) * 1971-02-03 1973-04-03 Steel Corp Aging resistant cold rolled sheet products
JPS5144486B2 (ja) * 1971-09-30 1976-11-29
FR2179008B1 (ja) * 1972-04-03 1975-12-26 Nippon Steel Corp
US3950191A (en) * 1974-10-21 1976-04-13 Kawasaki Steel Corporation Cold rolled steel sheets having an excellent enamelability and a method for producing said cold rolled steel sheets

Also Published As

Publication number Publication date
ATE167704T1 (de) 1998-07-15
JPH06220575A (ja) 1994-08-09
FR2696421A1 (fr) 1994-04-08
DE69319292T2 (de) 1998-11-12
EP0592267A1 (fr) 1994-04-13
JP3304173B2 (ja) 2002-07-22
ES2118918T3 (es) 1998-10-01
FR2696421B1 (fr) 1995-01-06
DE69319292D1 (de) 1998-07-30

Similar Documents

Publication Publication Date Title
EP0889145B1 (fr) Acier inoxydable austénoferritique à très bas nickel et présentant un fort allongement en traction
US3787248A (en) Process for preparing aluminum alloys
AU2022398813A1 (en) Can lid for food or drink
EP0592267B1 (fr) Emballage métallique à ouverture par rupture d'une ligne de moindre résistance et tÔle d'acier pour cet emballage
US11814701B2 (en) High-performance 5000-series aluminum alloys
EP0660882B1 (fr) Procede de fabrication d'une feuille mince apte a la confection d'elements constitutifs de boites
EP0713923B1 (fr) Alliage fer-nickel à faible coefficient de dilatation
CA2073131C (fr) Acier a emboutissage ameliore, procede de fabrication de toles minces destinees a l'emboutissage et tole mince obtenue
FR2664907A1 (fr) Procede de fabrication d'une tole ou feuillard en zircaloy de bonne formabilite et feuillards obtenus.
EP0474530B1 (fr) Procédé d'élaboration de produits à très haute charge à la rupture à partir d'un acier austénitique instable, et produits en résultant
FR2631350A1 (fr) Alliage de ni-fe ferromagnetique et procede de fabrication de brames ayant une qualite de surface excellente en cet alliage
FR2728490A1 (fr) Procede de fabrication d'une bande d'acier destinee a la fabrication par emboutissage et re-emboutissage de recipients en acier
EP0771365B1 (fr) Alliage de zinc coulable en chambre chaude
EP0764725A1 (fr) Procédé de fabrication d'une bande métallique pour emballages et emballages métalliques obtenus par ce procédé
EP0581629B1 (fr) TÔle pour emboutissage en rétreint
EP0504077A1 (fr) Alliages d'al pour emboutissage-étirage résistants, formables et isotropes
JPS6232264B2 (ja)
JP2023006447A (ja) タブ用アルミニウム合金塗装板
JPH08218144A (ja) スコア部の耐応力腐食割れに優れたキャンエンド用Ａｌ合金板
CA2423257C (fr) Tole ecrouie en acier calme a l'aluminium et procede de fabrication d'un emballage a partir de cette tole
JPH01116030A (ja) 開缶性と耐食性と落下強度に優れたイージーオープン蓋用鋼板の製造方法
JPS60145346A (ja) 引裂き強度の低いアルミニウム合金薄板
BE421636A (ja)
JPH0770721A (ja) スコア加工部の耐腐食割れ性に優れた蓋材用アルミニウム合金薄板の製造方法
EP0356356A1 (fr) Méthode pour réduire l'endommagement lors d'une déformation superplastique

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL PT SE

17P Request for examination filed

Effective date: 19940701

17Q First examination report despatched

Effective date: 19970304

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980624

REF Corresponds to:

Ref document number: 167704

Country of ref document: AT

Date of ref document: 19980715

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: BUGNION S.P.A.

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980624

REF Corresponds to:

Ref document number: 69319292

Country of ref document: DE

Date of ref document: 19980730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980924

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980924

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980924

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980930

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2118918

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20020815

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20020820

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20020911

Year of fee payment: 10

Ref country code: DE

Payment date: 20020911

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020913

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020917

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20020919

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20021011

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030921

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030921

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030921

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030922

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030930

BERE Be: lapsed

Owner name: *SOLLAC

Effective date: 20030930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040401

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030921

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040528

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20040401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030922

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050921