EP1405683B1 - Apparatus and method for deforming thin walled bodies - Google Patents

Apparatus and method for deforming thin walled bodies Download PDF

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Publication number
EP1405683B1
EP1405683B1 EP03026417A EP03026417A EP1405683B1 EP 1405683 B1 EP1405683 B1 EP 1405683B1 EP 03026417 A EP03026417 A EP 03026417A EP 03026417 A EP03026417 A EP 03026417A EP 1405683 B1 EP1405683 B1 EP 1405683B1
Authority
EP
European Patent Office
Prior art keywords
tooling
container
internal
wall
deforming
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.)
Revoked
Application number
EP03026417A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1405683A3 (en
EP1405683A2 (en
Inventor
Santiago Garcia Campo
Juan Saiz Goiria
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.)
Envases UK Ltd
Original Assignee
Envases UK Ltd
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
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Application filed by Envases UK Ltd filed Critical Envases UK Ltd
Priority claimed from EP01904127.6A external-priority patent/EP1216112B3/en
Publication of EP1405683A2 publication Critical patent/EP1405683A2/en
Publication of EP1405683A3 publication Critical patent/EP1405683A3/en
Application granted granted Critical
Publication of EP1405683B1 publication Critical patent/EP1405683B1/en
Anticipated expiration legal-status Critical
Revoked 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
    • 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

Definitions

  • the present invention relates to an apparatus and a method for deforming a predetermined wall zone of a thin walled container, particularly thin walled containers or tube-form bodies which may be of cylindrical or other form.
  • the invention is particularly suited to embossing of thin walled metallic bodies (particularly aluminium containers) by embossing or the like. More specifically the invention may be used in processes such as registered embossing of thin walled bodies, particularly registered embossing of containers having pre-applied (pre-printed) surface decoration.
  • US-A-3698337 discloses a further technique in which a tubular elastomeric member is positioned within a die contained can body and is pressurised to mold the can body to the shape of the die.
  • the present invention provides apparatus for use in deforming a predetermined wall zone of a thin walled container, the apparatus comprising:
  • the invention provides a method of deforming a thin walled container at a predetermined wall zone comprising:
  • Co-alignment of the tooling and the wall zone of the body is required in order to ensure that embossing deformation accurately lines up with pre-printed decoration on the body.
  • the body is not passed from being supported at a holding station to being supported by the tooling but, by contrast, remains supported at the holding station throughout the deforming process.
  • Re-configuration of the tooling avoids the requirement for the or each holding or clamping station to have the facility to re-orientate a respective body.
  • the technique is particularly suited to embossing containers having wall thicknesses(t) in the range 0.25mm to 0.8mm (particularly in the range 0.35mm to 0.6mm).
  • the technique is applicable to containers of aluminium including alloys, steel, tinplate steel, internally polymer laminated or lacquered metallic containers, or containers of other materials.
  • the containers will be cylindrical and the deformed embossed zone will be coordinated with a pre-printed/pre-applied design on the circumferential walls.
  • Typical diameters of containers with which the invention is concerned will be in the range 35mm to 74mm although containers of diameters outside this range are also susceptible to the invention.
  • the tooling will be re-configurable by rotation of the tooling about a rotational tooling axis to co-align with the predetermined wall zone.
  • the determination means preferably dictates the operation of the tooling rotation means to move/rotate the tooling to the datum position.
  • the determination means preferably determines a shortest rotational path (clockwise or anti-clockwise) to the datum position and triggers rotation of the tooling in the appropriate sense.
  • the length of time available to perform the steps of re-orientation and deformation is relatively short for typical production runs which may process bodies at speeds of up to 200 containers per minute.
  • Re-orientation of the tooling (particularly by rotation of the tooling about an axis) enables the desired re-orientation to be achieved in the limited time available.
  • the facility to re-orientate clockwise or anti-clockwise following sensing of the container orientation and shortest route to the datum position is particularly advantageous in achieving the process duration times required.
  • embossed relief features of greater depth/height can be produced. This is because prior art techniques generally use an internal tool which also serves to hold the container during deformation (embossing) and therefore typically only slight clearance between the internal tool diameter and the internal diameter of the container has been the standard practice.
  • a particular benefit of the present invention is that it enables a greater area of the container wall (greater dimension in the circumferential direction) to be embossed than is possible with prior art techniques where the emboss design would need to be present on a smaller area of the tool.
  • Rotating/cam-form tooling for example, has the disadvantage of having only a small potential area for design embossing.
  • Re-configurable, particularly collapsible/expandable internal tooling provides that greater depth/height embossing formations can be provided, the internal tooling being collapsed from engagement with the embossed zone and subsequently retracted axially from the interior of the container.
  • Embossed feature depth/height dimensions in the range 0.5mm and above are possible which have not been achievable with prior art techniques.
  • the external and internal tools may co-operate in a forming operation to deform a portion of the cylindrical container wall therebetween; wherein tooling actuation means is provided such that:
  • the technique of the invention is particularly suited to embossing containers having relatively thick wall thickness dimensions (for example in the range 0.35mm to 0.8mm).
  • Such thick walled cans are suitable for containing pressurised aerosol consumable products stored at relatively high pressures.
  • Prior art techniques have not been found to be suitable to successfully emboss such thicker containers, nor to produce the aesthetically pleasing larger dimensioned emboss features as is capable with the present invention (typically in the range 0.3mm to 1.2mm depth/height).
  • the technique has also made it possible to emboss containers (such as seamless monobloc aluminium containers) provided with protective/anti-corrosive internal coatings or layers without damage to the internal coating or layer.
  • emboss containers such as seamless monobloc aluminium containers
  • the apparatus and technique is directed to plastically deforming (embossing or debossing) the circumferential wall of an aluminium container 1 at a predetermined position relative to a preprinted decorative design on the external container wall.
  • embossing deformation is intended to coincide with the printed decorative design, this is referred to in the art as Registered Embossing.
  • a design 50 comprising a series of three axially spaced arc grooves is to be embossed at 180 degree opposed locations on the container wall (see figure 16a).
  • the location at which the design 50 is embossed is coordinated with the printed design on the container 1 wall. Coordination of the container 1 axial orientation with the tooling to effect deformation is therefore crucial.
  • the forming apparatus 2 comprises a vertically orientated rotary table 3 operated to rotate (about a horizontal axis) in an indexed fashion to successively rotationally advanced locations. Spaced around the periphery of table 3 are a series of container holding stations comprising clamping chucks 4. Containers are delivered in sequence to the table in random axial orientations, each being received in a respective chuck 4, securely clamped about the container base 5.
  • a vertically orientated forming table 6 faces the rotary table 3 and carries a series of deformation tools at spaced tooling stations 7. Following successive rotary index movements of rotary table 3, table 6 is advanced from a retracted position (figure 5) to an advanced position (figure 8). In moving to the advanced position the respective tools at tooling stations 7 perform forming operations on the container circumferential walls proximate their respective open ends 8. Successive tooling stations 7 perform successive degrees of deformation in the process. This process is well known and used in the prior art and is frequently known as necking. Necked designs of various neck/shoulder profiles such as that shown in figure 3 can be produced.
  • Necking apparatus typically operates at speeds of up to 200 containers per minute giving a typical working time duration at each forming station in the order of 0.3 seconds. In this time, it is required that the tooling table 6 moves axially to the advanced position, the tooling at a respective station contacts a respective container and deforms one stage in the necking process, and the tooling table 6 is retracted.
  • the tooling table carries embossing toling 10 at an embossing station 9.
  • the embossing tooling (shown most clearly in figures 11 to 16) comprises inner forming tool parts 11a, 11b of respective arms 11 of an expandible internal tool mandrel 15. Tool parts 11a, 11b carry respective female embossing formations 12.
  • the embossing tooling 10 also includes a respective outer tool arrangement including respective arms 13 carrying tooling parts 13a, 13b having complementary male embossing formations 14.
  • a respective outer tool arrangement including respective arms 13 carrying tooling parts 13a, 13b having complementary male embossing formations 14.
  • the respective internal tool parts 11a, 11b are positioned internally of the container spaced adjacently the container 1 wall; the respective external tool parts 13a,13b are positioned externally of the container spaced adjacently the container 1 wall.
  • the internal mandrel 15 is expandible to move the tooling parts 11a, 11b to a relatively spaced apart position in which they abut the internal wall of the container 1 (see figure 12) from the collapsed position shown in figure 11 (tools 11a, 11b spaced from the internal wall of the container 1).
  • An elongate actuator rod 16 is movable in a longitudinal direction to effect expansion and contraction of the mandrel 15 and consequent movement apart and toward one another of the tool parts 11a,11b.
  • a the cam head portion 17 of the actuator rod 16 effects expansion of the mandrel 15 as the actuator rod 16 moves in the direction of arrow A.
  • the cam head portion 17 acts against sloping wedge surfaces 65 of the tool parts 11a, 11b to cause expansion (moving apart) of the tool parts 11a, 11b.
  • the resilience of arms 11 biases the mandrel 15 to the closed position as the rod 16 moves in the direction of arrow B.
  • Outer tool arms 13 are movable toward and away from one another under the influence of closing cam arms 20 of actuator 21 acting on a cam shoulder 13c of respective arms 13. Movement of actuator 21 in the direction of arrow D causes the external tooling parts 13a to be drawn toward one another. Movement of actuator 21 in the direction of arrow E causes the external tool parts 13a to relatively separate. Arms 13 and 11 of the outer tool arrangement and the inner mandrel are retained by cam support ring 22. The arms 11, 13 resiliently flex relative to the support ring 22 as the actuators 21, 16 operate.
  • actuators may be used such as hydraulic/pneumatic, electromagnetic (e.g. solenoid actuators) electrical (servo/stepping) motors.
  • the operation of the embossing tooling is such that the internal mandrel 15 is operable to expand and contract independently of the operation of the external tool parts 13a.
  • the internal mandrel 15 (comprising arms 11) and the external tooling (comprising arms 13) connected at cam support ring 22, are rotatable relative to table 6, in unison about the axis of mandrel 15. Bearings 25 are provided for this purpose.
  • a servo-motor (or stepping motor) 26 is connected via appropriate gearing to effect controlled rotation of the tooling 10 relative to table 6 in a manner that will be explained in detail later.
  • the mandrel 15 is expanded by moving actuator rod 16 in the direction of arrow A causing the internal tooling parts 11a to lie against the internal circumferential wall of cylinder 1, adopting the configuration shown in figures 12, 12a.
  • Next actuator 21 moves in the direction of arrow D causing cam arms 20 to act on cam shoulder 13c and flexing arms 13 toward one another.
  • the external tooling parts 13a engage the cylindrical wall of container 1, projections 14 deforming the material of the container 1 wall into respective complementary receiving formations 12 on the internal tooling parts 11a.
  • the deforming tooling parts 11a, 13a can be hard, tool steel components or formed of other materials.
  • one or other of the tooling parts may comprise a conformable material such as plastics, polymeric material or the like.
  • the internal tooling parts 11a support the non deforming parts of the container wall during deformation to form the embossed pattern 50.
  • the situation is as shown in figures 13, 13a.
  • the configuration and arrangement of the cam arms 20, cam shoulders 13c of the external embossing tooling and the sloping (or wedge) cam surface of internal tooling parts 11a (cooperating with the cam head 17 of rod 16) provide that the embossing force characteristics of the arrangement can be controlled to ensure even embossing over the entire area of the embossed pattern 50.
  • the external cam force action on the outer tool parts 13a is rearward of the embossing formations 14; the internal cam force action on the inner tool parts 11a is forward of the embossing formations 12.
  • Next actuator 21 returns to its start position (arrow E) permitting the arms 13 of the external toling to flex outwardly to their normal position. In so doing tooling parts 13a disengage from embossing engagement with the container 1 external surface. At this stage in the procedure, the situation is as shown in figures 14, 14a.
  • the movement of the tools to effect embossing is translational only.
  • the rotary table is then indexed rotationally moving the embossed container to adjacent with the next tooling station 7, and bringing a fresh container into alignment with the embossing tooling 10 at station 9.
  • embossing stages described correspond to stages 106 to 112 in the flow diagram of figure 1.
  • this is conveniently achieved by reviewing the position of a respective container 1 whilst already securely clamped in a chuck 4 of the rotary table 3, and rotationally reorientating the embossing tooling 10 to the required position.
  • This technique is particularly convenient and advantageous because a rotational drive of one arrangement (the embossing tooling 10) only is required.
  • Chucks 4 can be fixed relative to the table 3 and receive containers in random axial rotational orientations. Moving parts for the apparatus are therefore minimised in number, and reliability of the apparatus is optimised.
  • the open ends 8 of undeformed containers 1 approaching the apparatus 2 have margins 30 printed with a coded marking band 31 comprising a series of spaced code blocks or strings 32 (shown most clearly in figure 4).
  • Each code block/string 32 comprises a column of six data point zones coloured dark or light according to a predetermined sequence.
  • a charge coupled device (CCD) camera 60 views a portion of the code in its field of view.
  • the data corresponding to the viewed code is compared with the data stored in a memory (of controller 70) for the coded band and the position of the can relative to a datum position is ascertained.
  • the degree of rotational realignment required for the embossing tooling 10 to conform to the datum for the respective container is stored in the memory of main apparatus controller 70.
  • the controller 70 when assessing the angular position of the tooling relative to the angular position to be embossed on the container utilises a decision making routine to decide whether clockwise or counterclockwise rotation of the tooling 10 provides the shortest route to the datum position, and initiates the required sense of rotation of servo-motor 26 accordingly. This is an important feature of the system in enabling rotation of the tooling to be effected in a short enough time-frame to be accommodated within the indexing interval of the rotating table 3.
  • the coding block 32 system is in effect a binary code and provides that the CCD camera device can accurately and clearly read the code and determine the position of the container relative to the tooling 10 datum by viewing a small proportion of the code only (for example two adjacent blocks 32 can have a large number of unique coded configurations).
  • the coding blocks 32 are made up of vertical data point strings (perpendicular to the direction of extent of the coding band 31) in each of which there are dark and light data point zones (squares). Each vertical block 32 contains six data point zones. This arrangement has benefits over a conventional bar code arrangement, particularly in an industrial environment where there may be variation in light intensity, mechanical vibrations and like.
  • the coding band 31 includes a coding block pattern that repeats over 180 degree spans.
  • the position determination system and control of rotation of the tooling 10 are represented in blocks 102 to 105 of the flow diagram of figure 1.
  • the coding band 31 can be conveniently printed contemporaneously with the printing of the design on the exterior of the container. Forming of the neck to produce, for example a valve seat 39 (figure 3) obscures the coding band from view in the finished product.
  • panoramic visual sensing of the coding band 31 a less preferred technique could be to use an alternative visual mark, or a physical mark (e.g. a deformation in the container wall) to be physically sensed.
  • a physical mark e.g. a deformation in the container wall
  • the technique is particularly switched to forming aesthetically pleasing embossed formations 50 of a greater height/depth dimension(d) (typically in the range 0.3mm to 1.2mm) than has been possible with prior art techniques. Additionally, this is possible with containers of greater wall thickness(t) than have been successfully embossed in the past.
  • Prior-art techniques have been successful in embossing aluminium material containers of wall thickness 0.075mm to 0.15mm.
  • the present technique is capable of embossing aluminium containers of wall thickness above 0.15mm, for example even in the range 0.25mm to 0.8mm.
  • the technique is therefore capable of producing embossed containers for pressurised aerosol dispensed consumer products which has not been possible with prior art techniques.
  • Embossed monobloc seamless aluminium material containers are particularly preferred for such pressurised aerosol dispensed products (typically having a delicate internal anti-corrosive coating or layer protecting the container material from the consumer product).
  • the present invention enables such containers to be embossed (particularly registered embossed).
  • the position of the container may be optically viewed to determine its orientation relative to the datum situation. If the orientation of the container 1 differs from the desired datum pre-set situation programmed into the system, then the container is rotated automatically about its longitudinal axis to bring the container 1 into the pre-set datum position. With the container in the required datum position, the container is inserted automatically into the clamp 4 of the holding station, and clamped securely. In this way the relative circumferential position of the printed design on the container wall, and the position of the tooling is coordinated. There is, thereafter, no requirement to adjust the relative position of the container and tooling. This technique is however less preferred than the technique primarily described herein in which the embossing tooling 10 is re-orientated.
  • the invention has primarily been described with respect to embossing aluminium containers of relatively thin wall thicknesses (typically substantially in the range 0.25mm to 0.8mm. It will however be readily apparent to those skilled in the art that the essence of the invention will be applicable to embossing thin walled containers/bodies of other material such as steel, steel tinplate, lacquered plasticised metallic container materials an other non-ferrous or non-metallic materials.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
EP03026417A 2000-02-10 2001-02-09 Apparatus and method for deforming thin walled bodies Revoked EP1405683B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB0003033 2000-02-10
GB0003033A GB0003033D0 (en) 2000-02-10 2000-02-10 Deformation of cylindrical bodies
GB0026325A GB0026325D0 (en) 2000-02-10 2000-10-27 Deformation of cylindrical bodies
GB0026325 2000-10-27
EP01904127.6A EP1216112B3 (en) 2000-02-10 2001-02-09 Deformation of thin walled bodies

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP01904127.6A Division EP1216112B3 (en) 2000-02-10 2001-02-09 Deformation of thin walled bodies
EP01904127.6A Division-Into EP1216112B3 (en) 2000-02-10 2001-02-09 Deformation of thin walled bodies

Publications (3)

Publication Number Publication Date
EP1405683A2 EP1405683A2 (en) 2004-04-07
EP1405683A3 EP1405683A3 (en) 2004-05-26
EP1405683B1 true EP1405683B1 (en) 2007-01-24

Family

ID=9885297

Family Applications (3)

Application Number Title Priority Date Filing Date
EP03026417A Revoked EP1405683B1 (en) 2000-02-10 2001-02-09 Apparatus and method for deforming thin walled bodies
EP03026418A Revoked EP1400291B1 (en) 2000-02-10 2001-02-09 Deformation of thin walled bodies
EP05013807A Revoked EP1595616B1 (en) 2000-02-10 2001-02-09 Method and apparatus for deforming thin walled bodies

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP03026418A Revoked EP1400291B1 (en) 2000-02-10 2001-02-09 Deformation of thin walled bodies
EP05013807A Revoked EP1595616B1 (en) 2000-02-10 2001-02-09 Method and apparatus for deforming thin walled bodies

Country Status (6)

Country Link
EP (3) EP1405683B1 (cs)
AR (2) AR045095A2 (cs)
CZ (2) CZ20033461A3 (cs)
ES (1) ES2392838T3 (cs)
GB (3) GB0003033D0 (cs)
YU (1) YU58402A (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2563270B (en) * 2017-06-08 2019-09-04 Envases Uk Ltd Deformation of thin walled bodies by registered shaping
CN110523824B (zh) * 2019-09-10 2020-08-11 浙江海洋大学 一种回转式薄壁罐体成型装置
CN118577653B (zh) * 2024-08-01 2024-10-29 浙江联大锻压有限公司 高强度钢薄壁环形件热矫形方法及设备

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ES2030635T3 (es) 1987-01-21 1993-01-01 Frattini S.P.A.-Costruzioni Meccaniche Perfeccionamiento en maquinas para dar forma conica y rebordear botes tipo aerosoles y similares.
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US5727414A (en) * 1995-06-07 1998-03-17 American National Can Company Method for reshaping a container
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US5687599A (en) 1996-01-04 1997-11-18 Reynolds Metals Company Method of forming a can with an electromagnetically formed contoured sidewall and necked end
US5799525A (en) 1996-07-19 1998-09-01 Aluminum Company Of America Tooling and method for the embossing of a container and the resulting container
US5893286A (en) 1996-07-19 1999-04-13 Aluminum Company Of America Apparatus and method for the registered embossing of containers
JP3441317B2 (ja) 1996-10-21 2003-09-02 大和製罐株式会社 胴部に凹凸模様をもつ変形金属缶の製造方法
DE19730900A1 (de) * 1997-07-18 1999-01-21 Jost Industriebeteiligungsgese Sickeneinrichtung zum Tiefziehen von Sicken der Wandung eines hohlzylinderförmigen Rohlings (Zarge) für eine Blechemballage
JP3997579B2 (ja) 1997-11-27 2007-10-24 東洋製罐株式会社 割型による缶胴の張出し成形方法及びその装置
IT1319568B1 (it) 2000-12-18 2003-10-20 Frattini Costr Mecc Procedimento per la realizzazione di impronte su contenitori metallici

Also Published As

Publication number Publication date
CZ306580B6 (cs) 2017-03-15
EP1400291A2 (en) 2004-03-24
GB0026325D0 (en) 2000-12-13
YU58402A (sh) 2003-12-31
CZ20033410A3 (cs) 2017-03-15
EP1405683A3 (en) 2004-05-26
CZ306579B6 (cs) 2017-03-15
AR045095A2 (es) 2005-10-12
CZ20033461A3 (cs) 2017-03-15
AR045096A2 (es) 2005-10-12
EP1405683A2 (en) 2004-04-07
GB0003033D0 (en) 2000-03-29
EP1400291A3 (en) 2004-05-26
GB0026326D0 (en) 2000-12-13
ES2392838T3 (es) 2012-12-14
EP1400291B1 (en) 2006-07-12
EP1595616B1 (en) 2012-06-06
EP1595616A1 (en) 2005-11-16

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