EP0298230B1 - Verfahren und Vorrichtung zum Herstellen von pyramidenstumpfförmiger Dosenzargen - Google Patents

Verfahren und Vorrichtung zum Herstellen von pyramidenstumpfförmiger Dosenzargen Download PDF

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Publication number
EP0298230B1
EP0298230B1 EP88108120A EP88108120A EP0298230B1 EP 0298230 B1 EP0298230 B1 EP 0298230B1 EP 88108120 A EP88108120 A EP 88108120A EP 88108120 A EP88108120 A EP 88108120A EP 0298230 B1 EP0298230 B1 EP 0298230B1
Authority
EP
European Patent Office
Prior art keywords
expanding
conveyor
shape
bodies
mandrels
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
EP88108120A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0298230A2 (de
EP0298230A3 (en
Inventor
Herwig Schmidt
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.)
Elpatronic AG
Original Assignee
Elpatronic 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 Elpatronic AG filed Critical Elpatronic AG
Publication of EP0298230A2 publication Critical patent/EP0298230A2/de
Publication of EP0298230A3 publication Critical patent/EP0298230A3/de
Application granted granted Critical
Publication of EP0298230B1 publication Critical patent/EP0298230B1/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
    • 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
    • B21D51/2646—Of particular non cylindrical shape, e.g. conical, rectangular, polygonal, bulged
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S72/00—Metal deforming
    • Y10S72/715—Method of making can bodies

Definitions

  • the invention aims to further develop this method in order to ensure that the longitudinal seam on the finished can always lies at a predetermined location, namely - with a preferably rectangular cross-section - in the middle of the narrow side of the truncated pyramid. At this point the seam has the least impact on the appearance of the finished product, and the larger sides remain free for printing or for adding additional embossments or the like.
  • the predetermined, always constant positioning of the longitudinal seam also creates favorable conditions for the subsequent, automated attachment of a base and a cover to the frames.
  • the frames are widened over the major part of their length in the second spreading operation in such a way that they assume a truncated pyramid shape from their larger end face, and in opposite directions in an edge region adjacent to their smaller end face be stretched at least elastically so that their previous truncated cone shape is at least approximated to a prism shape.
  • the second spreading operation comprises these different effects on the edge region mentioned on the one hand and the entire remaining height of the frame on the other hand, the security against undesired deformations of the edge regions of the frames is particularly great.
  • the invention further relates to a device for carrying out the method according to the invention, with a longitudinal conveyor for the transport of the cylindrical frames.
  • a device for carrying out the method according to the invention with a longitudinal conveyor for the transport of the cylindrical frames.
  • each frame has a first expanding mandrel that expands it in an oval manner has to cover the second expanding mandrel, which will widen it essentially pyramid-shaped, only a short, straight path, so that the transfer conveyor can be designed in a simple manner.
  • the device shown serves the purpose of frames 2 for cans or the like. to be further processed, which are supplied to it in a circular-cylindrical initial state designated by a in FIG. 2 by a frame welding machine of a conventional type and each have a longitudinal seam 4 and, near one of its end faces, a tear strip 6 which is closed in a ring shape.
  • the device deforms the frames 2, as can be seen in FIG. 2, step by step, namely starting from the circular cylindrical one Shape a into an oval-cylindrical shape b, then into an oval-conical shape c, then into shape d with a pyramid-like main part and a prism-like edge area 8.
  • the pyramid-like main part of the frames 2 in the deformation state d has the cross-sectional shape of a rounded rectangle; its large base is on the end face, which is adjacent to the tear strip 6, while the small end face of the pyramid-like main part lies at the transition into the prism-like edge region 8. From then to the front side remote from the tear strip 6, the frame 2 has a constant, rounded rectangular cross section.
  • the frame 2 is given the shape e, which differs from the shape d only in that the two wider of the four side surfaces each have a longitudinal depression 10.
  • the longitudinal seam 4 lies in the middle of one of the two narrow side faces of the frame 2.
  • the device which causes the described deformations of the frames 2 has a machine frame 12 with a bracket 14 which carries an electric motor 16 and a gear 18 for driving a longitudinal conveyor 20.
  • the longitudinal conveyor 20 has a conveyor belt 22 which conveys the frames 2 at short intervals in succession in the direction of the arrow A in FIG. 1.
  • the electric motor 16 also drives a pair of lateral conveyor belts 24 via the gear 18, which converge in the conveying direction in such a way that they gradually press the frames 2, which have left a welding station 26 in the circular-cylindrical state a, into the oval-cylindrical shape b.
  • the longitudinal seam 4 lies in a longitudinal center plane between the two lateral conveyor belts 24, in which the zones strongest curvature of the oval-shaped frames 2 lie. So that the frames 2 cannot rotate on the conveyor belt 22, the latter is magnetized or guided on a magnetic rail.
  • a first stand 28 On the machine frame 12, on the right in FIG. 1, a first stand 28 is attached, which belongs to a first cross conveyor 30.
  • a first turntable 31 is mounted on the stand 28 so as to be rotatable about a horizontal axis B parallel to the longitudinal conveyor 20.
  • eight expansion mandrels 32 parallel to the axis B are attached at regular intervals.
  • the turntable 31 can be driven in rotation by a drive, not shown, step by step, in each case by 45 °, that is to say by the angular distance between two adjacent expanding mandrels 32.
  • Each of the expanding mandrels 32 has a support part 34 fastened to the rotary table 31, on which a ring segment rods 36 is mounted.
  • Each of the segment rods 36 is pivotable about an axis that tangents a circle around the axis of the expanding mandrel 32 in question.
  • the entirety of the segment rods 36 of each expanding mandrel 32 forms, in a rest position, an essentially oval-cylindrical body, onto which one of the frames 2 of oval-cylindrical shape b can easily be pushed.
  • a spring 38 which extends around the segment rods 36, strives to maintain its rest position.
  • the segment rods 36 can be spread apart by means of a wedge 40 in such a way that a frame 2 placed on them is expanded from their oval-cylindrical shape b into the oval shape c, the greatest expansion taking place in the region of the end face, which is the Tear strip 6 adjacent and facing away from the turntable 31.
  • a tappet 42 To operate the Wedge 40 is provided with a tappet 42, which can be moved back and forth in the direction of axis B by a piston-cylinder unit 44 supported on stand 28.
  • each of the expanding mandrels 32 is surrounded by a ring of guide lamellae 46.
  • the plunger 42 has been retracted into its rest position, to the right in FIG. 1, and the segment rods 36 have also been returned to their starting position by the spring 38, the frame 2 widened on the expanding mandrel 32 in question remains in the guide plates 46 in this way maintained that its axis continues to coincide with the axis of the expanding mandrel 32.
  • a second stand 48 which belongs to a second cross conveyor 50, is fastened on the machine frame 12 at a distance from the first stand 28, further left in FIG. 1.
  • a second rotary table 51 is rotatably mounted about a horizontal axis C parallel to the axis B at a distance.
  • eight expanding mandrels 52 are attached parallel to the axis C at equal angular intervals of 45 °.
  • the second rotary table 51 can be rotated step by step by 45 ° in synchronism with the first rotary table 31 and adjusted such that an expanding mandrel 32 is aligned with an expanding mandrel 52 after each step.
  • Each of the expanding mandrels 52 has a support part 54 fastened to the turntable 51, on which four segment rods 56 are slidably mounted and are held together by springs 58.
  • the segment rods 56 can be spread apart by means of a wedge 60 in such a way that the expanding mandrels 52 taper in the same direction, to the right in FIG. 1, as the expanding mandrels 32.
  • a plunger 62 which can be actuated by a piston-cylinder unit 64 supported on the stand 48.
  • the segment rods 56 are supported on a head piece 66 of the associated support part 54.
  • Ribs 68 which each adjoin one of the four segment rods 56, extend from the base of each support part 54 to the vicinity of its head piece 66.
  • the segment rods 56 each have an approximately quarter-circular cross section and have a main section 70 which extends from the base of the associated expanding mandrel 52 over the greater part of their length and to which an additional section 72 extends toward the head piece 66.
  • the segment rods 56 With their main sections 70, the segment rods 56 form a truncated pyramid in their rest position, onto which a frame 2 in its oval-conical shape c can easily be pushed. While the main sections 70 diverge away from the head piece 66 when the segment rods 56 are at rest, the additional sections 72 are designed such that they diverge slightly towards the head piece 66 in the rest state.
  • one of the expanding mandrels 32 is aligned with the longitudinal conveyor 20, so that a frame 2 of oval-cylindrical shape b can be pushed onto it.
  • Conveying means of conventional design can be provided, for example cams arranged on the longitudinal conveyor 20 itself, or separate conveying means of the type described below for the transfer of the frames 2 from one of the expanding mandrels 32 to one of the expanding mandrels 52 .
  • the station in which a frame 2 is pushed onto one of the expanding mandrels 32 is designated S1 in FIG. 1.
  • the same expanding mandrel 32 comes after a rotation of the rotary table 31 by 45 ° in a station S2, in which its wedge 40 is pressed by the plunger 42 into the space between the segment rods 36, so that they are spread apart and the frame 2 is oval-conical in the manner described widen.
  • the plunger 42 is then withdrawn, to the right in FIG. 1, and as a result the segment rods 36 are returned to the rest position by the spring 38, the wedge 40 being pushed axially, likewise to the right in FIG. 1.
  • the turntable 31 is gradually rotated further, so that the expansion mandrel 32, together with the oval-shaped frame 2, reaches stations S5 via stations S2, S3 and S4, which is diametrically opposite station S1.
  • the expanding mandrel 32 is axially opposite one of the expanding mandrels 52 attached to the rotary table 51 at a short distance.
  • This second expanding mandrel 52 is located in a station S6.
  • a pair of transfer conveyors 74 are provided which relate to one another in relation to the expanding mandrels 32 and located in the stations S5 and S6 52 are arranged diametrically opposite each other and can be pushed back and forth on a pair of guide rods 76 parallel to axes B and C.
  • Cross rods 78 are guided on each transfer conveyor 74 and can be displaced at right angles to the guide rods 76 and carry yokes 80.
  • Suction cups 82 are attached to each yoke 80, which are connected to a suction pump and can be placed against the frame 2 to be displaced, in order to take them along from the station S5 to the station S6 when the transfer conveyor 74 moves.
  • the frame 2 which has been oval-conically widened and now pushed onto an expanding mandrel 52, reaches a station S7 in which the expanding mandrel 52 is expanded by the action of the plunger 62, as a result of which the frame 2 has its largely truncated pyramid-like shape and prism-like shape in the edge region 8 d receives.
  • Each of the expanding mandrels 52 is assigned a pair of bases 84 fastened to the turntable 51, on each of which a latch 86 is pivotably mounted.
  • the pair of bolts 86 which is thus assigned to each of the expanding mandrels 52, is held together by an annular spring 88.
  • a rear flange 90 is formed on the wedge 60 of each of the expanding mandrels 52, behind which the associated latches 86 engage when the plunger 62 has pressed the wedge 60 into the space between the associated segment rods 56 in order to spread them apart. In this way, the segment rods 56 are locked in their spread position so that they do not return to their rest position when the plunger 62 is withdrawn and the turntable 51 is rotated further.
  • each of the expanding mandrels 52 remains spread on the way from station S7 to a next station S8.
  • An embossing tool 94 is arranged in station S8 on a fixed cheek 92, which embosses the described depressions 10 into the broad sides of each frame 2 reaching this station.
  • the turntable 51 is then rotated through a further 45 °, so that the expanding mandrel 52 reaches a station S9; there the wedge 60 is unlocked so that the segment rods 56 return to their rest position.
  • the expansion mandrel 52 arrives with the now finished frame 2 in a station S10, where the frame by means of a device, which may be similar to the transfer conveyor 74, is pulled off the expanding mandrel 52 and placed on a further longitudinal conveyor 96.
  • a device which may be similar to the transfer conveyor 74, is pulled off the expanding mandrel 52 and placed on a further longitudinal conveyor 96.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Specific Conveyance Elements (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Heat Treatment Of Articles (AREA)
  • Automatic Assembly (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Forging (AREA)
EP88108120A 1987-07-07 1988-05-20 Verfahren und Vorrichtung zum Herstellen von pyramidenstumpfförmiger Dosenzargen Expired - Lifetime EP0298230B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2571/87A CH673790A5 (pl) 1987-07-07 1987-07-07
CH2571/87 1987-07-07

Publications (3)

Publication Number Publication Date
EP0298230A2 EP0298230A2 (de) 1989-01-11
EP0298230A3 EP0298230A3 (en) 1990-07-18
EP0298230B1 true EP0298230B1 (de) 1992-11-19

Family

ID=4236790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88108120A Expired - Lifetime EP0298230B1 (de) 1987-07-07 1988-05-20 Verfahren und Vorrichtung zum Herstellen von pyramidenstumpfförmiger Dosenzargen

Country Status (15)

Country Link
US (2) US4901557A (pl)
EP (1) EP0298230B1 (pl)
JP (1) JPH01215420A (pl)
KR (1) KR920004664B1 (pl)
CN (1) CN1013482B (pl)
AU (1) AU622111B2 (pl)
BR (1) BR8803368A (pl)
CH (1) CH673790A5 (pl)
DE (2) DE3725186A1 (pl)
DK (1) DK378388A (pl)
FI (1) FI882827A (pl)
GR (1) GR3006879T3 (pl)
NO (1) NO169639C (pl)
SU (1) SU1625323A3 (pl)
ZA (1) ZA884213B (pl)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH676210A5 (pl) * 1988-07-19 1990-12-28 Elpatronic Ag
CH677742A5 (pl) * 1989-02-16 1991-06-28 Elpatronic Ag
MY106679A (en) * 1989-02-22 1995-07-31 Mitsubishi Materials Corp Apparatus and method for crimping end of can body
CH678501A5 (pl) * 1989-05-16 1991-09-30 Elpatronic Ag
JP3149945B2 (ja) * 1990-01-26 2001-03-26 アメリカン ナショナル カン カンパニー 容器を加工するための方法および装置
US5916317A (en) * 1996-01-04 1999-06-29 Ball Corporation Metal container body shaping/embossing
US6079244A (en) * 1996-01-04 2000-06-27 Ball Corporation Method and apparatus for reshaping a container body
US7094502B2 (en) * 1997-12-12 2006-08-22 Alcon Inc. Methods for transferring holographic images into metal surfaces
US20040003638A1 (en) * 1997-12-12 2004-01-08 Schaefer Mark W. Transfer of holographic images into metal sporting and fitness products
US6260401B1 (en) * 1997-12-15 2001-07-17 Bestex Kyoei Co., Ltd. Method of molding high expansion pipe and the high expansion pipe
US6038910A (en) * 1998-12-30 2000-03-21 Can Industry Products, Inc. Method and apparatus for forming tapered metal container bodies
AUPQ261199A0 (en) * 1999-09-02 1999-09-23 Van Leer Australia Pty. Ltd. A drum and method and apparatus for manufacturing a drum
AR027371A1 (es) * 2000-02-10 2003-03-26 Envases Uk Ltd Deformacion de cuerpos de pared delgada
BR0003728B1 (pt) * 2000-06-20 2009-08-11 processo de fabricação de lata de seção poligonal e lata de seção poligonal.
US20080098601A1 (en) * 2006-10-30 2008-05-01 Shape Corporation Tubular tapered crushable structures and manufacturing methods
PL2111935T3 (pl) * 2008-04-22 2012-07-31 Impress Group Bv Sposób i urządzenie do promieniowego rozszerzania korpusu pojemnika
US9126257B2 (en) * 2011-04-04 2015-09-08 Batesville Services, Inc. Method of forming sheet metal casket shell
RU2473410C2 (ru) * 2011-04-14 2013-01-27 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Уральский федеральный университет имени первого Предидента России Б.Н. Ельцина" Устройство для получения многогранных труб
CN102513442B (zh) * 2011-11-24 2014-02-05 贵州安大航空锻造有限责任公司 高温合金矩形环轧件热胀形成形为异形环件的方法
US9382034B2 (en) * 2012-05-15 2016-07-05 Silgan Containers Llc Strengthened food container and method
US8978922B2 (en) 2012-05-15 2015-03-17 Silgan Containers Llc Strengthened food container and method
ES2586705T3 (es) * 2013-09-20 2016-10-18 Crown Packaging Technology Inc Producción de extremo de lata
JP6457286B2 (ja) * 2015-02-04 2019-01-23 株式会社ジャパンペール 製缶用エキスパンダー、製缶システム、及び製缶用エキスパンド加工方法

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GB764601A (en) * 1954-04-28 1956-12-28 Metal Box Co Ltd Improvements in or relating to the manufacture of can bodies
US3172386A (en) * 1962-12-28 1965-03-09 American Can Co Can manufacturing method
GB1060316A (en) * 1963-03-05 1967-03-01 Smith Olof Ab Device for production of sheet metal objects of truncated cone shape
US3271984A (en) * 1963-04-08 1966-09-13 Continental Can Co Method and apparatus for forming "f" oblong can bodies
GB1291839A (en) * 1969-07-18 1972-10-04 Dale Ltd John A taper-expanding mandrel
US3759203A (en) * 1970-12-30 1973-09-18 Continental Can Co Container shaping apparatus
JPS6024434B2 (ja) * 1976-07-07 1985-06-12 セイコーエプソン株式会社 電子時計
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Also Published As

Publication number Publication date
US5000370A (en) 1991-03-19
DE3725186C2 (pl) 1990-10-18
AU622111B2 (en) 1992-04-02
NO883017L (no) 1989-01-09
JPH0353056B2 (pl) 1991-08-13
DE3876019D1 (de) 1992-12-24
EP0298230A2 (de) 1989-01-11
AU1676988A (en) 1989-01-12
BR8803368A (pt) 1989-01-31
GR3006879T3 (pl) 1993-06-30
CN1013482B (zh) 1991-08-14
CN1030372A (zh) 1989-01-18
KR890001652A (ko) 1989-03-28
DE3725186A1 (de) 1989-01-19
NO169639C (no) 1992-07-22
ZA884213B (en) 1990-02-28
DK378388D0 (da) 1988-07-07
SU1625323A3 (ru) 1991-01-30
FI882827A0 (fi) 1988-06-14
US4901557A (en) 1990-02-20
DK378388A (da) 1989-01-08
KR920004664B1 (ko) 1992-06-13
CH673790A5 (pl) 1990-04-12
EP0298230A3 (en) 1990-07-18
NO883017D0 (no) 1988-07-06
NO169639B (no) 1992-04-13
FI882827A (fi) 1989-01-08
JPH01215420A (ja) 1989-08-29

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