EP1184103A2 - Ein Verfahren zum Herstellen eines Blechbehälters, ein solcher Blechbehälter und eine Vorrichtung zum Durchführen des Verfahrens - Google Patents

Ein Verfahren zum Herstellen eines Blechbehälters, ein solcher Blechbehälter und eine Vorrichtung zum Durchführen des Verfahrens Download PDF

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Publication number
EP1184103A2
EP1184103A2 EP01610091A EP01610091A EP1184103A2 EP 1184103 A2 EP1184103 A2 EP 1184103A2 EP 01610091 A EP01610091 A EP 01610091A EP 01610091 A EP01610091 A EP 01610091A EP 1184103 A2 EP1184103 A2 EP 1184103A2
Authority
EP
European Patent Office
Prior art keywords
base
shell
container
sheet material
curvature
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
EP01610091A
Other languages
English (en)
French (fr)
Other versions
EP1184103A3 (de
EP1184103B1 (de
Inventor
Lars Erik Sebbelov
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.)
CONSAFE ApS
Original Assignee
CONSAFE ApS
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Filing date
Publication date
Application filed by CONSAFE ApS filed Critical CONSAFE ApS
Priority to SI200130679T priority Critical patent/SI1184103T1/sl
Publication of EP1184103A2 publication Critical patent/EP1184103A2/de
Publication of EP1184103A3 publication Critical patent/EP1184103A3/de
Application granted granted Critical
Publication of EP1184103B1 publication Critical patent/EP1184103B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D51/26—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
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/12—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls
    • B65D7/34—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls
    • B65D7/36—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls formed by rolling, or by rolling and pressing

Definitions

  • the invention relates to a method for producing a sheet metal container, including formation of a shell by bending an essentially square, preferably rectangular, piece of sheet metal and joining two essentially parallel lateral edges of the sheet material, which sides thus meet, expansion of the shell, narrowing and flanging of a bottom portion of the shell and mounting of a base of a corresponding sheet material.
  • the base is essentially plane.
  • the joining of the two lateral edges of the shell material can e.g. be made by spot welding and the base can e.g. be mounted by seaming.
  • the invention relates further to a metal sheet container comprising a shell of a single layer of the sheet material, a joint extending from the top of the container to its base, which shell forms a side wall of the container, and comprising a rim at the top of the container and a mounted base of metal sheet.
  • the present invention is based on a container with a form as the one shown in WO 92/04248 where the base is formed by a method corresponding to the one shown in EP-A-0 377 985 by narrowing and flanging an end of a shell and mounting of a base, e.g. by seaming.
  • the rim of the base is formed by a flange, and the side wall from the flange extends a little obliquely upwards and outward to a bend and then further essentially vertically upward.
  • the diameter in the area with said bend has no particularly precise dimensions, and therefore, in order to stack both empty and filled containers and containers closed with a lid, relatively small dimensions with a large tolerance must be given, which is inconvenient when stacking more containers upon each other since such a stack might not be vertical, and thus under unfortunate circumstances will be likely to overturn.
  • Said bend can furthermore form a weak point in relation to the large loads from above, e.g. when stacking many containers on top of each other.
  • the container described in WO 92/04248 has a mounted rim element at the top portion of the shell.
  • This rim element is formed by punching a ring out of a square sheet blank, forming the ring and seaming it on to the shell. A surplus hereof will be a circular disc punched out of said ring.
  • WO 99/37420 describes a deep-drawn can body in which a hole is provided in the base, and a reversed cup is inserted and glued on to the rim of said hole or seamed there on to whereupon the flange is pressed up in the can. A beverage can with a refrigerating facility is thus obtained.
  • US-A-5 022 254 describes the expansion of a tubular can body by means of an expansion cartridge divided in segments.
  • DE-A-195 02 992 describes a pressure vessel, e.g. an aerosol can produced by rolling a sheet metal piece together with a large overlap (at least one turn) and seaming a base from within, the end portion of the vessel body being narrowed after the base has been inserted in the interior of the body, and seamed with the base, the flange being in the interior of the can.
  • a pressure vessel e.g. an aerosol can produced by rolling a sheet metal piece together with a large overlap (at least one turn) and seaming a base from within, the end portion of the vessel body being narrowed after the base has been inserted in the interior of the body, and seamed with the base, the flange being in the interior of the can.
  • EP-A-0 377 985 describes a method of and an apparatus for narrowing and formation of flanges in the end of a tubular can blank.
  • DE-A-34 02 197 describes an apparatus and a method for producing aerosol cans, whereby the seams of the bottom and the top are pressed into the can and a thus resulting "sandwich-flange" is bent over the seam.
  • US-A-3 921 848 describes an aerosol can where the base in an embodiment is formed such that the shell extends through a curvature and essentially vertically up to a seam where it is connected to a base sheet.
  • the shell provides a single, narrow base area around the mounted base.
  • the base of the aerosol can is designed in the same way as described above with reference to DE-A-34 02 197, the mounted base with the seam being pressed up in the container.
  • the object of the invention is to provide a container, a method for producing such a container and an apparatus for performing the method, whereby disadvantages of the prior art are avoided.
  • this is obtained by means a method which is characterized in that by the expansion of the shell, the portion of the shell immediately above the base portion is expanded essentially more strongly than the base portion, and that the more strongly expanded portion is pressed down around the base in order to provided an additional, annular base surface around the mounted base. It is thus possible by expansion of the portion of the shell immediately above the base portion to calibrate the diameter of the base portion. Thereby, the conicity of a conical container can be reduced in relation to that of known containers (approximation to a cylindrical form), which is an advantage as to strength.
  • the strength of the corner of the container between the base and the side wall is further enhanced as the joint between the side wall material and the base material which is usually a flange joint or seam constitutes a weak point.
  • this joint is removed into the base surface of the container where the joint is less exposed to impacts, e.g. if a container falls by accident and lands on the edge between the base and the side wall.
  • the mounted base is formed preferably of a piece of sheet material of a diameter equal to or smaller than a piece remaining from the formation of the rim element.
  • the base portion of the shell is essentially not expanded, whereas the remaining portion of the shell is expanded whereby a shoulder-shaped transition is formed between the base portion and the remaining portion of the shell. This facilitates the later pressing down of the portion of the shell above the base portion.
  • the portion of the shell immediately above the base portion is expanded preferably to predetermined dimensions in connection with its being pressed down around the base. The said calibration is thus obtained of the diameter of the base portion.
  • a top portion of the shell is expanded essentially less than a central part of the shell during the expansion of this central part, and subsequently the top portion is expanded and flanged separately. It is thus possible to obtain a very heavy deformation of the top portion of the shell, either with a view to mounting a rim element or with a view to rolling the top portion of the shell in order to provide an integrated rim reinforcement.
  • the object is further obtained by a container which is characterized in that the shell in the base area of the container from the side wall extends through a curvature and radially toward the centre of the base and to the joint between the shell and the mounted base, whereby a part of the shell forms two annular base areas around the mounted base, a radially exterior of the two base areas being situated in the bottom level of the container, and the radially interior of the two base areas being situated at a higher level. Both annular base areas have a radial extension and the radially interior base area extends thus a distance in a radial direction away from the joint.
  • the mounted base is preferably formed by a piece of material with a diameter being equal to or smaller than the internal diameter of the annular blank of the rim element. It is thus obtained that the base can be formed by the centre circle part from the cut-out of the rim element.
  • the shell extends in the base area from the curvature at the side wall inward toward the centre of the base, upward and through a curvature inverse in relation to the first curvature to the seam situated outside the container between the shell and the base.
  • the shell thus extends preferably essentially horizontally from the first curvature to a second curvature, from there obliquely into the interior of the container to said inverse curvature and further on essentially horizontally to the seam.
  • an apparatus for performing the method comprises means for formation of a shell by bending of an essentially square, preferably rectangular piece of sheet material and joining of two essentially parallel lateral edges of the sheet material, which sides thus meet, means for expansion of the shell, means for narrowing and flanging of a base portion of the shell and means for mounting of a base of a corresponding sheet material, where means for expansion of the portion of the shell immediately above the base portion are meant to also press this portion down around the base in order to provide an additional, annular base surface around the mounted base. Furthermore, there are preferably means for expanding and flanging the top portion of the shell separately.
  • the container shown in Figs. 1 and 2 has a body with a side wall 2 formed by a shell 1, on which wall supports 3 are mounted for a handle 4.
  • the container has furthermore a cover 5 of a design known per se and which abuts on the rim surrounding the opening of the container.
  • the cover 5 has as usual an essentially plane centre area 5a surrounded by plane rim area 5b raised in relation to the centre area.
  • the rim is in the shown embodiment constituted of a rim element 6 mounted at the opening of the container (Fig. 2), which element through a flange joint or seam 7 is connected with the top portion 8 of the shell 1.
  • the side wall has in the embodiment example a circular cross section and is vaguely conical such as it is per se known according to containers for paint and the like, so-called technical tinplate packaging.
  • the invention can also be used in connection with containers with a cylindrical side wall and containers with another cross section than circular.
  • the container shown in Fig. 1 can have a cubic content of 2-5 1, however, the invention can be used in connection with containers with a cubic content from 1 to 20 1 or even from 0.25 to 40 1.
  • the container according to the invention has a base with a characteristic form.
  • a part of the base is constituted by a base element 9 which is connected to the shell 1 by a flange joint or seam 10 which is known per se.
  • the shell 1 has a base portion 11 which from the side wall 2 through a curvature 12 with a small radius of curvature extends radially toward the central axis of the container during formation of an annular, external base surface 13, through a further curvature 14 up in the container and through yet another curvature 15 to the seam 10.
  • the container rests essentially on the external base surface 13 when the container stands on a plane surface.
  • Fig. 4 shows a vertical section through the top of a container known per se where instead of the mounted rim 6, a folding 6a is formed of the top portion of the shell 1 in order to provide a strong rim.
  • a container with this rim form can also be provided with a base designed according to the invention.
  • a container with a base according to the invention can be produced as will be explained in the following with reference to Figs. 5-11.
  • a preferably rectangular piece of sheet metal e.g. with a thickness of 0.20-0.24 mm and of the quality T 56 or T 61, is folded to form a tubular shell 1, and the lateral edges thus meeting are mutually connected e.g. by means of a spot welding 16 (Fig. 5).
  • the portions of the shell 1 placed above the base portion 11 are expanded radially to form a tube with an expanded top portion 17, a non-expanded base portion 11 and a shoulder or curvature 12 at the transition from the top portion 17 to the base portion 11 (Fig. 6).
  • the base portion 1 is narrowed radially and flanged by methods known per se to form a narrowed base portion 11 with a flange 19 (Fig. 7).
  • a base element prepared for the purpose 9 is seamed in a known manner together with the base portion 11 by means of the flange 19 during the formation of a seam 10 (Fig. 8).
  • An expander cartridge with thrust pad segments 20 and preferably an extension equalizing membrane is guided down into the shell 1 and presses first the area at the shoulder or the curvature 12 down to the level of the underside of the seam 10 (Fig. 9). It is preferably controlled that the segments 20 are placed such in relation to the spot welding 16 of the shell (1) that this is positioned centrally in relation to a segment 20 as shown in Figs. 9 and 10. The segments 20 are then dispersed radially as their top portions are dispersed more than their bottom portions, the central part 21 of the shell 1 being provided with a conical form with determined dimensions (Fig. 10). The height of the segments 20 is limited such that the top portion 8 of the shell 1 is essentially not expanded at this step. The succession of the pressing down and dispersion of the segments 20 can be inverted in relation to the above mentioned, or the two movements can be effected more or less at the same time.
  • the top portion 8 is subsequently expanded and flanged separately by means of rolls 22 (Fig. 11).
  • the shell 1 is expanded more strongly than usually.
  • the said central placement of the spot welding 16 is made in relation to a segment 20, and the top portion 8 is expanded as stated by spin flanging such that the tensile stress in the deformation zone is kept at a relatively low level during expansion. If the area around the spot welding 16, or the joint if another type of joint is used, will hold, there is according to the invention nothing to prevent that the top portion 8 is expanded together with the central part 21 of the shell 1.
  • the container blank After the flanging of the top portion 8, the container blank is ready for mounting of the rim element 6 in a manner known per se.
  • the container can be produced with a finer tolerance and thus a little larger diameter dimensions on said place, which is an advantage when the containers are stacked as shown in Fig. 2, since a more precise positioning is obtained of the base of one container within an edge 23 of the cover 5 of the next container. The possibility of a stack of several containers being skew is thus minimized and consequently the risk of such a stack tumbling over is minimized.
  • the said larger diameter dimension entails furthermore that the conicity of the container is smaller, which is an advantage as to strength.
  • the container may during stacking yield such that the breakpoint on one single place along the circumference sinks to the foundation. The stacking may then risk tumbling.
  • a base designed according to the invention essentially eliminates the risk of the base yielding at one single place in relation to the rest of the circumference.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Stackable Containers (AREA)
  • Catalysts (AREA)
  • Making Paper Articles (AREA)
  • Arc Welding In General (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
EP01610091A 2000-09-01 2001-08-29 Ein Verfahren zum Herstellen eines Blechbehälters, ein solcher Blechbehälter und eine Vorrichtung zum Durchführen des Verfahrens Expired - Lifetime EP1184103B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200130679T SI1184103T1 (sl) 2000-09-01 2001-08-29 Postopek izdelave plocevinastega vsebnika, tak vsebnik in naprava za izvajanje postopka

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200001294 2000-09-01
DKPA200001294 2000-09-01

Publications (3)

Publication Number Publication Date
EP1184103A2 true EP1184103A2 (de) 2002-03-06
EP1184103A3 EP1184103A3 (de) 2003-05-28
EP1184103B1 EP1184103B1 (de) 2006-10-25

Family

ID=8159686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01610091A Expired - Lifetime EP1184103B1 (de) 2000-09-01 2001-08-29 Ein Verfahren zum Herstellen eines Blechbehälters, ein solcher Blechbehälter und eine Vorrichtung zum Durchführen des Verfahrens

Country Status (9)

Country Link
EP (1) EP1184103B1 (de)
AT (1) ATE343439T1 (de)
CY (1) CY1105911T1 (de)
DE (1) DE60124041T2 (de)
DK (1) DK1184103T3 (de)
ES (1) ES2273793T3 (de)
NO (1) NO325386B1 (de)
PT (1) PT1184103E (de)
SI (1) SI1184103T1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006016009U1 (de) * 2006-10-19 2008-03-06 Ackermann, Bruno Stapelbare Dose
WO2011086123A1 (en) * 2010-01-14 2011-07-21 Impress Group B.V. A method and apparatus for making a can with a curled end, such can and can body

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953994A (en) * 1969-12-11 1976-05-04 Dale E. Summer Can bodies and method and apparatus for manufacture thereof
DE8003529U1 (de) * 1980-02-09 1980-05-14 Zuechner Blechwaren Verpackungsbehaelter insbesondere Spruehdose
BR8804178A (pt) * 1988-08-09 1990-01-02 Antonio Henrique Kramer Processo e dispositivo para fabricacao de corpos de lata por estiramento,com expansao do diametro e reducao da espessura da chapa,partir de um corpo cilindrico de lata,menor diametro,feito em chapa de maior espessura

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006016009U1 (de) * 2006-10-19 2008-03-06 Ackermann, Bruno Stapelbare Dose
WO2011086123A1 (en) * 2010-01-14 2011-07-21 Impress Group B.V. A method and apparatus for making a can with a curled end, such can and can body
EP2347838A1 (de) * 2010-01-14 2011-07-27 Impress Group B.V. Verfahren und Vorrichtung zur Herstellung einer gebördelten Dose, solche Dose und Dosenkörper
CN102712026A (zh) * 2010-01-14 2012-10-03 印普瑞思集团有限公司 制造具有卷曲端的罐的方法和装置、这种罐以及罐体
US8671730B2 (en) 2010-01-14 2014-03-18 Impress Group B.V. Method and apparatus for making a can with a curled end, such can and body
CN102712026B (zh) * 2010-01-14 2015-08-05 印普瑞思集团有限公司 制造具有卷曲端的罐的方法和装置、这种罐以及罐体

Also Published As

Publication number Publication date
NO325386B1 (no) 2008-04-14
SI1184103T1 (sl) 2007-04-30
NO20014235L (no) 2002-03-04
DK1184103T3 (da) 2007-01-29
CY1105911T1 (el) 2011-04-06
DE60124041D1 (de) 2006-12-07
ES2273793T3 (es) 2007-05-16
EP1184103A3 (de) 2003-05-28
DE60124041T2 (de) 2007-05-31
EP1184103B1 (de) 2006-10-25
PT1184103E (pt) 2007-01-31
NO20014235D0 (no) 2001-08-31
ATE343439T1 (de) 2006-11-15

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