EP0582984B1 - Vorrichtung und Verfahren zum Einhalsen von Dosen mittels Fliessdrücken - Google Patents

Vorrichtung und Verfahren zum Einhalsen von Dosen mittels Fliessdrücken Download PDF

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Publication number
EP0582984B1
EP0582984B1 EP93112667A EP93112667A EP0582984B1 EP 0582984 B1 EP0582984 B1 EP 0582984B1 EP 93112667 A EP93112667 A EP 93112667A EP 93112667 A EP93112667 A EP 93112667A EP 0582984 B1 EP0582984 B1 EP 0582984B1
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EP
European Patent Office
Prior art keywords
roll
slide
container
side wall
slide roll
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
EP93112667A
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English (en)
French (fr)
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EP0582984A1 (de
Inventor
Harry W. Lee, Jr.
Alan H. Myrick
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Reynolds Metals Co
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Reynolds Metals Co
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Filing date
Publication date
Priority claimed from US07/929,933 external-priority patent/US5245848A/en
Priority claimed from US07/929,932 external-priority patent/US5282375A/en
Application filed by Reynolds Metals Co filed Critical Reynolds Metals Co
Publication of EP0582984A1 publication Critical patent/EP0582984A1/de
Application granted granted Critical
Publication of EP0582984B1 publication Critical patent/EP0582984B1/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
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/12—Edge-curling
    • 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
    • B21D51/2638—Necking

Definitions

  • the present invention relates generally to apparatus and methods for necking-in container bodies preferably in the form of a cylindrical one-piece metal can having an open end terminating in an outwardly directed peripheral flange merging with a circumferentially extending neck and, more particularly, to an improved spin flow necking process and apparatus.
  • the 211 diameter configuration (can-maker's terminology referring to a diameter of 68,26 mm (2-11/16")) caused two major problems in the two-piece aluminum D&I can.
  • the first problem was split flanges. Specifically, in the flanging operation, the metal was expanded from the 66,04 mm (2.6") body diameter to a 71,12 mm (2.8") flange diameter, i.e., a 7.7% increase. This obviously create circumferential tension in the flange which resulted in a tendency for it to split. Split flanges resulted in leakage from the can seams which was a major problem.
  • the second problem related to conveying the flanged cans. When adjacent cans were allowed to touch, flange damage would occur and conveying jams were frequent because of the way the cans would tilt when in flange-to-flange contact which created clearance between the can bodies.
  • Necking reduced the diameter of the open end of the can prior to flanging which allowed a smaller end (e.g., a 209 end which is 65,09 mm (2-9/16") diameter in can-maker's terminology) to be used.
  • the resulting configuration greatly reduced the tendency for split flanges since the flange diameter in the necked can is only 2.3% greater than the body diameter.
  • Necking also made conveying the cans easier since, with only slight flange overlap, the cans would contact body-to-body. Seamed 209 cans could contact body-to-body without tilting.
  • the necking process was instrumental in the subsequent success of the two-piece D&I beverage can.
  • the three-piece steel can virtually disappeared from the can beverage market.
  • the 206 aluminum can Three different necking processes were used to produce the 206 aluminum can. In one process, a four-stage die necking procedure resulted in each successively formed neck reducing the diameter by about 2,16 mm (.085"). In this process, four distinct necks are formed on the can. This process is called “quad-neck. " Another process is a six-stage die necking process whereby each step reduces the diameter about 1,4 mm (.055") and the necks blend together in a continuous profile. This process is called “smooth die neck.” The third type of necking process is a combination of either two or three die necks followed by a spin necking operation.
  • spin necking Each of the die necking operations reduces the diameter by about 1,905 mm - 2,794 mm (.075 - .110”) and the spin necking operation reduces it by .110"
  • the spin necking process smooths all but the first die neck which leaves one obvious neck that blends into a continuous profile. This process is called "spin necking.”
  • a renewed interest in cost competitiveness has resulted in the production of even smaller diameter can ends.
  • can-makers ponder the possibility of a 204 can end and smaller necks, they necessarily revisited the can design criteria.
  • the capacity of the can must be maintained without changing the can height or diameter. This means that as the neck diameter decreases, the neck angle would ideally become greater so as to maintain the neck shoulder location and not encroach upon the volume of the can.
  • a side benefit of a steeper neck angle is reduced metal usage.
  • Can-makers typically employed thicker metal in the neck area of the can to facilitate necking and flanging. Therefore, a steeper, shorter neck means reduced length for the thicker metal which results in the reduced metal usage.
  • a third advantage of a steeper neck is increased billboard, i.e., the cylindrical portion of the can available for customer graphics.
  • the spin flow tooling assembly 10 depicted in Figure 1 includes a necking spindle shaft 16a rotatable about its axis of the rotation A by means of a spindle gear 16 mounted to the shaft between front and rear bearings (not shown).
  • the slide roll 19 is mounted to the front end of the necking spindle shaft 16a through a slide mechanism 28, keyed to the shaft, which permits co-rotation of the roll 19 while allowing it to be slid by the necking forces described more fully below in the axially rearward direction B' away from the eccentric freewheeling roll 24 located adjacent the front face of the slide roll.
  • This shaft 18 extends through the necking spindle shaft 16a.
  • the spindle shaft 16 is rotated by the spindle gear 16 without rotating the eccentric roll support shaft 18.
  • the outer forming roll 11 is mounted radially outwardly adjacent the slide and eccentric rolls 19,24.
  • the container slide roll 19 is shaped with a conical leading edge 19a designed to first engage the open end C'' of the container C to support same for rotation about spindle axis A under the driving action of the necking spindle gear 16 which may be driven by the same drive mechanism driving each base pad assembly 29 engaging the container bottom wall.
  • Slide roll 19 is also free to slide axially but is resiliently biased into the container open end C'' via springs 20 which may be of the compression type.
  • the container open end C'' engages and is rotated by the slide roll 19.
  • the eccentric roll 24 is then rotated into engagement with a part of the inside surface of the container side wall C' located inwardly adjacent the open end C''.
  • the external forming roll 11 then begins to move radially inward into contact with the container side wall C' spanning the gap respectively formed between the conical faces 19a,24e of the slide and eccentric rolls 19,24.
  • the side wall C' of the spinning container body C is initially a straight cylindrical section of generally uniform diameter and thickness which may extend from a pre-neck (not shown) previously formed in the container side wall such as by static die necking.
  • the external forming roll 11 engages the container side wall C', it commences to penetrate the gap between the fixed internal eccentric roll 24 and the axially movable slide roll 19, forming a truncated cone (Figure 2B).
  • the side wall of the cone increases in length as does the height of the cone as the external forming roll chamfer 11c continues to squeeze or press the container metal along the complemental slope or truncated cone 24e of the eccentric roll 24 as depicted in Figure 2C.
  • the cone continues to be generated as the external forming roll 11 advances radially inwardly (the slide roll 19 continues to retract axially as a result of direct pushing contact from roll 11 through the metal) until a reduced diameter 124 is achieved as depicted in Figures 2C and 2D.
  • the necked-in portion 124 or throat of the container C conforms to the shape of the forming portion of the forming roll 11.
  • the rim portions 123 of the neck which extend radially outwardly from the necked-in portion 124 are being formed by the complemental tapers 11b,19a of the forming roll 11 and the slide roll 19 to complete the necked-in portion.
  • the above-described spin flow necking process while producing a large diameter reduction in the open end of the container C (e.g., 0,889 mm (0.350”)), has various drawbacks when applied to two-piece aluminum can manufacture.
  • One drawback for example, is grooving of the neck at the initial point of contact between rolls 11,19 in Figure 2B which occurs on the inside of the container as a result of the small radii on the forming roll pushing past and against the small radii on the slide roll as the forming roll moves radially inwardly and axially rearwardly during the necking process along the chamfer 24e of the eccentric roll.
  • the spring pressure acting against the slide roll 19 in the direction of the forming roll disadvantageously results in pinching of the end of the flange-like portion 123 and undesirable thinning of the metal.
  • the edge is sometimes thinned down to a knife edge.
  • Another object is to control the interaction of the outer form roll with the inner slide roll to ensure that the form roll acts directly on the metal at appropriate instances while preventing excessive interaction which may result in grooving.
  • Still a further object is to prevent excessive thinning of the flange type edge by preventing excessive force from being applied to the edge by the form and slide rolls.
  • Yet another object is to increase the spring force initially urging the slide roll towards the eccentric roll to allow a snug fit to occur between the container open end and the slide roll outer surface for improved support of the container open end on the slide roll during spin flow necking.
  • An apparatus for necking-in an open end of a container body comprises a first member and a second member mounted for engaging the open end of the container side wall along an inner surface thereof.
  • Means is provided for rotating the container body and externally located means moves radially inward into deforming contact with an outside surface of the container side wall in a region thereof overlying an interface between the first and second members.
  • Such contact between the externally located means with the side wall causes the contacted wall portion to move radially inwardly into a gap formed at the interface, caused by axial separation of the first and second members under the action of the radially inward advancing movement of the externally located means into the gap to thereby neck-in the side wall.
  • means controlled by sensing radially inward movement of the externally located means, is provided for initiating gradual axial separation between the first and second members before the externally located means acts directly on both the first and second members through the contacted portion.
  • the first member is a slide roll engaging and supporting the inside of the container open end.
  • the slide roll is mounted for driven rotary motion about, and axial movement along, the container axis.
  • the slide roll is resiliently biased into the container open end.
  • the second member is an axially fixed roll mounted in axially inwardly spaced relation to the slide roll for engagement with an inside surface of the container side wall.
  • the second roll has a conical end surface which faces the open end of the container and the slide roll includes a conical end surface facing the conical end surface of the axially fixed roll in opposite inclination thereto.
  • the externally located means is a form roll having a peripheral deforming nose positioned externally of the container side wall and mounted for free rotary and controlled radial movement towards and away from the container.
  • the form roll is biased for axial movement along an axis parallel to the container axis.
  • the form roll deforming nose includes first and second oppositely inclined conical surfaces which are respectively opposed to the conical surfaces on the second roll and slide roll.
  • the control means includes a cam follower surface mounted to contact one of the conical surfaces on the form roll during radial inward advancing movement thereof as the form roll initially contacts the conical surface on the second roll through the container side wall and before the form roll contacts the conical surface on the slide roll.
  • a cam follower surface mounted to contact one of the conical surfaces on the form roll during radial inward advancing movement thereof as the form roll initially contacts the conical surface on the second roll through the container side wall and before the form roll contacts the conical surface on the slide roll.
  • Such control means preferably includes a cam ring mounted to the slide roll radially outwardly adjacent therefrom.
  • the cam follower surface is a conical surface which is located radially outwardly adjacent the conical surface of the slide roll and is disposed in a plane which is spaced closer to the opposing conical surface on the form roll, relative to the plane of the conical surface on the slide roll, by a distance slightly greater than the undeformed thickness of the container side wall.
  • cam follower surface and the conical surface of the form roll facing the cam follower surface are further arranged to produce the following motions:
  • An annular clearance gap is formed between the conical surfaces of the slide roll and cam ring to receive the container side wall open end which is supported on the slide roll during necking.
  • the slide roll and cam ring may also be of unitary construction. Preferably, however, these are separate members to enable the slide roll to be made of carbide to provide proper tooling surfaces while the cam ring is made of hardened tool steel.
  • a method of spin flow necking-in an open end of a cylindrical container body comprises the steps of positioning inside the container body an axially fixed roll engageable with the inside surface of the container body.
  • the axially fixed roll has a sloped end surface which faces the open end of the container body.
  • a slide roll is also positioned inside the container body which fits the inside diameter of the open end to support same.
  • the slide roll has an end facing the sloped end surface of the axially fixed roll.
  • the slide roll is supported for axial displacement away from the axially fixed roll.
  • the slide roll end and the sloped end surface of the axially fixed roll define a gap therebetween.
  • An outer form roll is positioned opposite the gap radially outwardly from the container body for axial displacement away from the axially fixed roll during contact with the sloped end of same.
  • the form roll has a trailing end portion and a peripheral forming portion. As the container body spins, the form roll is advanced radially inwardly relative to the gap so that the trailing end portion presented by the roll and the sloped end surface of the axially fixed roll engage the container body between them while the trailing end portion of the form roll moves inwardly along the sloped end surface of the axially fixed roll to roll a neck into the container body.
  • the slide roll is retracted axially until the roller has spun an outwardly extending portion on the end portion of the container body engaged between the slide roll and the roller.
  • the axial retracting movement of the slide roll is controlled by contact between a surface of the form roll with a cam follower surface.
  • the form roll has conical surfaces which are respectively engageable with the sloped end surface on the axially fixed roll and another sloped end surface on the slide roll. These form roll conical surfaces are smoothly connected with a curved forming surface extending therebetween and defined by a pair of small radii.
  • the sloped end of the slide roll is also smoothly connected through another small radius to the axially extending surface thereof which is engageable with the inside surface of the container body.
  • the cam follower surface operates to axially retract the holder as the small radius on the form roll approaches the small radius on the slide roll to thereby prevent pinching of the container side wall between these two small radii by allowing the radii to approach each other while maintaining separation therebetween by a distance slightly greater than the original thickness of the container side wall.
  • FIG 3 is a schematic illustration of a spin flow necking assembly in accordance with the present invention.
  • the functional components are substantially identical to the tooling components described in connection with Figure 1, supra, except as noted hereinbelow.
  • Spin flow necking assembly 100 includes a cam ring 102 in the form of a cylindrical member having a conical face 104 extending at the same angle as the conical forming surface 19a on the slide roll 19' in spaced, radially outward adjacent relationship, such that the conical face or cam follower surface 104 contacts the conical lead portion 11b of the form roll 11 before the small radius 106 between this lead surface and the forming surface 11a on the form roll exert force on the metal wrapped around the corresponding small radius 108 of the slide roll 19' in the manner discussed more fully below.
  • the cam follower surface 104 on the cam ring 102 is disposed in a plane P parallel to the plane P' of the slide roll chamfer 19a ( Figure 5 only) and is spaced forwardly therefrom by approximately the initial metal thickness.
  • the cam ring 102 is fastened to the slide roll 19' and rotates and moves with it.
  • rearward axial displacement of the cam ring 102 is transmitted to the slide roll 19' by the form roll 11 via nesting engagement of the rear face 102a of the cam ring against an annular mounting flange 110 projecting radially outwardly from the rear portion of the slide roll.
  • the container bottom 112 is loaded onto the base pad assembly 29 which retains the container C by vacuum applied in a known manner through a central hole 114.
  • the container C is located on a raised circular plug 116 inside the countersink diameter of the bottom.
  • An airtight seal is maintained on the outside tapered surface of the container bottom 112 with an elastic seal 118.
  • the base pad assembly 29 is axially movable to advance the container into the tooling for forming and to remove the finished can for transfer to a flanging operation.
  • the base pad assembly 29 dwells at both ends of its motion and has no axial movement during the forming process.
  • the base pad is rotated by a main drive (not shown) and provides most of the rotative force on the container during the forming process.
  • the main drive may also rotate the necking spindle assembly to ensure synchronous co- rotation.
  • the slide roll 19' is a cylindrical sleeve with a conical end 19a over which the open end C'' of the container is positioned by the movement of the base pad.
  • the slide roll 19' is supported by a rotating mandrel 120 driven by the main drive at the same rotative speed as the base pad assembly, as aforesaid.
  • the slide roll is spring-loaded against a positive stop 122 and is pushed out of the open end of the container C by the form roll 11.
  • the slide roll 19' is also rotated by the driven mandrel 120 upon which it slides.
  • the eccentric roll 24 is a cylindrical roll which is smaller than the final neck diameter of the container.
  • the working surfaces are the cylindrical outside diameter 25, the conical surface 24e and the connecting radius 124.
  • the conical angle of 24e determines the cone angle that is formed on the container.
  • the form roll 11 is a cylindrical roll with a profiled outside diameter that forms the entire outside surface of the container neck area. It is free to rotate on an axis and is biased against a stop 126 with a light spring 12a. It is free to slide toward the open end of the container C against the light spring pressure. The axis on which it rotates is moved toward the container C to force the form roll 11 into contact with the container. It is free to seek an equilibrium position between the eccentric roll 24 and the cam ring/slide roll assembly.
  • the base pad 29 is in the load position with a container C in place on the pad.
  • the eccentric roll 24 is concentric with the slide roll 19'.
  • the slide roll 19' is against the forward stop 122 and the form roll assembly is in the 'out' position.
  • the base pad assembly 29 has moved the container C onto the slide roll 19' and the eccentric roll 24 has rotated to contact the container at the neck location C''.
  • the form roll 11 has moved toward the container C and the form roll radius has contacted the container at the pre-neck location thereon.
  • the rotating container C has also started both the eccentric roll 24 and form roll 11 to rotate.
  • the form roll axis has moved radially inwardly closer to the container axis and has started to form the neck.
  • the conical surface 24e on the eccentric roll 24 has forced the form roll 11 toward the open end C'' of the container C.
  • the form roll 11 has just touched the cam follower surface 104.
  • the small radius 106 on the form roll 11 is very close to the small radius 108 on the slide roll 19' but does not pinch the metal between these two points. This is because the cam ring follower surface 104 is positioned so these radii 106,108 may approach each other but stay separated by a distance slightly greater than the initial side wall thickness.
  • the form roll 11 has penetrated further between the eccentric roll 24 and the slide roll 19'.
  • the small radius 106 on the form roll 11 is just passing the small radius 108 on the slide roll 19'.
  • the rolls 11,19' do not pinch the metal but have moved closer.
  • the form roll 11 is forcing the slide roll 19' back by contact between the form roll and the cam ring 102 instead of contact at this point between the form roll and the slide roll as occurred in the aforesaid prior spin flow necking process.
  • the slide roll 19' and cam ring 102 may be of unitary construction with an annular gap 140 between the slide roll forming surface 19a and the cam ring follower surface 104 to initially receive the container open end C'' which must engage the rearwardly extending axial surface 142 of the slide roll before necking begins (Figure 4). Since the form roll 11 engages the container C only at one side, it will be appreciated that the container open C'' end tends to be deformed into an oval shape when viewed in cross section in a direction parallel to the container longitudinal axis A.
  • annular gap 140 between the forward end portion 144 of the cam ring 102 and slide roll 19' be sufficiently wide in the radial direction to prevent the container open end from contacting the rearwardly axially extending inner surface 146 ( Figure 5 only) of the cam ring which may cause the metal of the container to split.
  • the groove is approximately 2,032 mm (.080")wide.
  • the slide roll 19' and cam ring 102 may be of unitary construction, as aforesaid, it is preferred to form these elements as separate components in accordance with the preferred embodiment since the slide roll is preferably carbide metal while the cam ring is tool steel. As a practical matter, forming the cam ring and slide roll from carbide metal so as to be of unitary construction is not feasible since it is very difficult to machine the annular clearance gap 140 between the slide roll forming surface 19a and the cam ring follower surface 104 as aforesaid.
  • cam ring 102 of the present invention Another advantage achieved with the cam ring 102 of the present invention is the ability to utilize a heavier spring 20 urging the slide roll 19' into its initial, axially forward position, in comparison with the initial spring force in the prior spin flow necking process.
  • the initial spring force could not exceed 5 pounds since the greater the spring force, the more extensive the grooving will be.
  • a greater spring force is desirable since the snugger the fit between the slide roll 19' and container open end C'', the greater the control will be over the final neck diameter.
  • the spring pressure may be greater.
  • the spring pressure is preferably now 2268 g - 3629 g (5 - 8 pounds.)
  • the inner cylindrical surface 150 of the cam ring 102 is formed with an annular groove adopted to receive an O-ring 152 as best depicted in Figure 11 only.
  • This O-ring 152 is engageable with an annular groove 154 formed in the outer cylindrical surface of the slide roll 19' located between the mounting flange 110 and the forming surface 19a.
  • the O-ring 152 prevents any relative axial sliding movement from occurring between the cam ring 102 and the slide roll 19'.
  • the cam ring 102 and slide roll 19' may be screwed or bolted together.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Joints Allowing Movement (AREA)
  • Gears, Cams (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Glanulating (AREA)

Claims (12)

  1. Vorrichtung zum Einhalsen eines offenen Endes einer Seitenwand eines Behälterkörpers mit:
    a) einer ersten Einrichtung (19) und einer zweiten Einrichtung (24), die zum Eingriff mit Innenflächen der Seitenwand des Behälters, die das offene Ende bildet, angeordnet sind;
    b) einer Einrichtung zum Drehen des Behälterkörpers (19);
    c) einer außen angeordneten Einrichtung (11), die angeordnet ist zur radial nach innen gerichteten Bewegung in verformenden Kontakt mit einer Außenfläche der Seitenwand des Behälters in einem Bereich davon, der eine Zwischenfläche zwischen der ersten (19) und zweiten (24) Einrichtung überdeckt, wobei eine Berührung zwischen der außen angeordneten Einrichtung (11) mit der Seitenwand den berührten Wandabschnitt sich radial nach innen gerichtet in einen Spalt bewegen läßt, der an der Zwischenfläche durch eine axiale Trennung der ersten (19) und zweiten (24) Einrichtung hervorgerufen ausgebildet ist unter der Wirkung der radial nach innen gerichtet fortschreitenden Bewegung der außen angeordneten Einrichtung (11) in den Spalt zum Einhalsen der Seitenwand,
    gekennzeichnet durch
    d) eine durch die Erfassung der radial nach innen gerichteten Bewegung der außen angeordneten Einrichtung (11) gesteuerte Einrichtung zur Auslösung der schrittweisen axialen Trennung der ersten (19) und zweiten (24) Einrichtung, bevor die außen angeordnete Einrichtung (11) über den berührten Abschnitt direkt auf die erste (19) und zweite (24) Einrichtung wirkt.
  2. Vorrichtung nach Anspruch 1, wobei
    die erste Einrichtung (19) eine Gleitrolle (19) ist, die mit der Innenseite des offenen Endes der Seitenwand des Behälters in Eingriff steht und zur angetriebenen Drehbewegung um und zur axialen Bewegung entlang der Achse des Behälters angeordnet ist und eine nachgiebige Einrichtung (20) zum Drücken der Gleitrolle in das offene Ende des Behälters hinein beinhaltet; die zweite Einrichtung (24) eine axial feststehende zweite Rolle (24) ist, die in einem axial nach innen gerichteten beabstandeten Verhältnis zu dem offenen Ende des Behälters angeordnet ist zum Eingriff mit einer inneren Fläche der Seitenwand des Behälters, wobei die zweite Rolle (24) eine konische Endfläche (24e) besitzt, welche dem offenen Ende des Behälters gegenüberliegt und die Gleitrolle (19) eine konische Endfläche (104) aufweist, die der konischen Endfläche (24e) der zweiten Rolle (24) gegenüberliegt, wobei sich die konischen Flächen in entgegengesetzte Neigungen zueinander erstrecken; die außen angeordnete Einrichtung (11) eine Formrolle (11) ist mit einer verformenden Nase am Umfang, die außerhalb der Seitenwand des Behälters angeordnet ist und zur freien drehenden und gesteuerten radialen Bewegung zur Seitenwand hin und von dieser weg angeordnet ist, wobei die Formrolle (11) zur axialen Bewegung entlang einer Achse parallel zu der Achse des Behälters vorgespannt ist, wobei die verformende Nase der Formrolle erste (11a) und zweite (11b) entgegengesetzt geneigte konische Flächen aufweist, die jeweils der konischen Fläche (24e) an der zweiten Rolle (24) und der konischen Fläche (104) an der Gleitrolle (19) gegenüber liegen.
  3. Vorrichtung nach Anspruch 2, wobei die Einrichtung, welche durch die Erfassung der nach innen gerichteten Bewegung der außen angeordneten Einrichtung gesteuert ist, eine Nockenstößelfläche (104) aufweist, die zur Berührung einer der konischen Flächen an der Formrolle (11) während deren radial nach innen gerichtet fortschreitender Bewegung angeordnet ist, wenn die Formrolle (11) anfangs die konische Fläche an der Formrolle (24) über die Seitenwand des Behälters berührt und bevor die Formrolle die konische Fläche an der Gleitrolle (19) über die Seitenwand des Behälters berührt, wodurch der Kontakt zwischen der Formrolle (11) mit der Nockenstößelfläche verursacht, daß die Gleitrolle (19) anfängt, sich axial von der zweiten Rolle (24) weg zu bewegen, um dadurch ein Quetschen der Seitenwand des Behälters zwischen der Formrolle (11) und der Gleitrolle (19) zu verhindern.
  4. Vorrichtung nach Anspruch 3, wobei die Einrichtung, die durch die Erfassung der radial nach innen gerichteten Bewegung der außen angeordneten Einrichtung gesteuert ist, einen Nockenring (102) aufweist, der an der Gleitrolle (19) radial außen benachbart davon angeordnet ist, wobei die Nockenstößelfläche (104) eine konische Fläche an dem Nockenring (102) ist, die radial außen benachbart zur konischen Fläche an der Gleitrolle (19) angeordnet ist und in einer Ebene angeordnet ist, die zur gegenüberliegenden konischen Fläche an der Formrolle (11) näher beabstandet ist, relativ zu der Ebene der konischen Fläche an der Gleitrolle (19) um einen Abstand, der geringfügig größer ist als die nicht verformte Dicke der Seitenwand des Behälters.
  5. Vorrichtung nach Anspruch 4, weiterhin mit einem ringförmigen Spalt, der zwischen den konischen Flächen der Gleitrolle (19) und dem Nockenring (102) ausgebildet ist zur Aufnahme des offenen Endes der Seitenwand des Behälters, das während des Einhalsens an der Gleitrolle abgestützt ist.
  6. Vorrichtung nach Anspruch 5, wobei die Gleitrolle (19) und der Nockenring (102) eine einstückige Konstruktion sind.
  7. Vorrichtung nach Anspruch 3, wobei die Nockenstößelfläche (104) und die konische Fläche der Formrolle (11), welche der Nockenstößelfläche gegenüberliegt, wie folgt ausgebildet sind
    i) die Formrolle (11) besitzt eine Fläche, die anfangs die Nokkenstößelfläche berührt, wenn sie radial nach innen gerichtet und zu der Gleitrolle (19) hin fortschreitet über einen gleitenden Kontakt mit der konischen Fläche der zweiten Rolle (24), so daß die Gleitrolle (19) anfangs axial von der Formrolle (11) durch den Nockenring (102) weg bewegt ist und dadurch die Seitenwand des Behälters nicht zwischen der Formrolle und der Gleitrolle gequetscht wird;
    ii) ein verdickter Abschnitt der Seitenwand des Behälters, der sich zwischen der Formrolle (11) und der Gleitrolle (19) erstreckt wird unter geringfügigen Druck gesetzt, wenn die Formrolle (11) radial nach innen gerichtet fortschreitet derart, daß die Gleitrolle (19) direkt über die Seitenwand des Behälters von der Formrolle (11) gedrückt wird und nicht über einen Kontakt mit der Nockenstößelfläche; und
    iii) die sich weiter radial nach innen bewegende Formrolle (11) die Nockenstößelfläche (102) wieder berührt und dadurch den Betrag der Klemmkraft und die Pressung des Randes der Seitenwand des Behälters steuert, die sich nun zwischen der Formrolle und der Gleitrolle (19) erstreckt, um dessen übermäßige Ausdünnung zu verhindern.
  8. Verfahren zum Einhalsen eines offenen Endes eines zylindrischen Behälterkörpers mittels Fließdrückens mit folgenden Schritten:
    a) Anordnen einer axial feststehenden Rolle (24) innerhalb des Behälterkörpers in axial nach innen beabstandeter Beziehung von seinem offenen Ende, die mit einer inneren Fläche des Behälterkörpers in Eingriff bringbar ist, wobei die axial feststehende Rolle eine abgeschrägte Endfläche besitzt, die dem offenen Ende gegenüber liegt;
    b) Anordnen einer Gleitrolle (19) innerhalb des Behälterkörpers, die in den Innendurchmesser des Behälterkörpers paßt zu dessen Unterstützung, wobei die Gleitrolle (19) ein Ende besitzt, welches der abgeschrägten Endfläche der axial feststehenden Rolle (24) gegenüber liegt und die Gleitrolle (19) zum axialen Versatz von der axial feststehenden Rolle (24) weg abgestützt ist, wobei das Ende der Gleitrolle (19) und die abgeschrägte Endfläche der axial feststehenden Rolle dazwischen einen Spalt begrenzen;
    c) Anordnen einer Druckrolle (11) gegenüber dem Spalt an einer äußeren Fläche des Behälterkörpers, die zum axialen Versatz von der axial feststehenden Rolle weg abgestützt ist, wobei die Druckrolle einen nachlaufenden Endabschnitt und einen Umfangsabschnitt besitzt;
    d) schnelles Drehen des so durch die Gleitrolle (19) abgestützten Behälterkörpers und fortbewegen der Druckrolle radial nach innen relativ zu dem Spalt, so daß der durch die Druckwalze zur Verfügung gestellte nachlaufende Endabschnitt und die abgeschrägte Endfläche der axial feststehenden Rolle an einem Behälterkörper zwischen ihnen angreifen, während sich der nachlaufende Endabschnitt der Druckrolle (11) nach innen gerichtet entlang der abgeschrägten Endfläche der axial feststehenden Rolle (24) bewegt, um eine Einhalsung in den Behälterkörpers zu rollen; und
    e) Fortsetzen der schnellen Drehung des Behälterkörpers, während sich die Druckrolle (11) nach innen gerichtet bewegt und sich die Gleitrolle axial zurückzieht, bis die Druckrolle einen sich nach außen erstreckenden Abschnitt an dem Endabschnitt des Behälterkörpers, der zwischen der Gleitrolle und der Druckrolle eingegriffen ist erzeugt hat,
    gekennzeichnet durch
    steuern der axialen Rückwärtsbewegung der Gleitrolle (19) durch Kontakt zwischen einer Fläche der Druckrolle mit einer Nockenstößelfläche, welche den axialen Rückzug der Gleitrolle steuert.
  9. Verfahren nach Anspruch 8, wobei die formgebende Druckrolle (11) konische Flächen besitzt, die mit der abgeschrägten Endfläche an der axial feststehenden Rolle (24) und einer weiteren geneigten Endfläche an dem Ende der Gleitrolle (19), die den Spalt begrenzt, in Eingriff bringbar ist, wobei die konischen Flächen der Formrolle gleichmäßig mit einer gekrümmten formgebenden Fläche verbunden sind, die sich dazwischen erstreckt und durch ein Paar kleiner Radien begrenzt werden und das abgeschrägte Ende der Gleitrolle (19) gleichmäßig mit seiner axial erstreckenden Fläche verbunden ist, die mit der inneren Fläche des Behälterkörpers mittels eines weiteren Abschnittes von kleinem Radius in Eingriff bringbar ist und wobei die Nockenstößelfläche (104) zum axialen Rückzug der Gleitrolle (19) arbeitet, wenn der kleine Randes an der Formrolle sich dem kleinen Radius an der Gleitrolle (19) nähert, um dadurch ein Quetschen der Seitenwand des Behälters zwischen diesen zwei kleinen Radien zu verhindern dadurch, daß sich die Radien einander nähern, während die Trennung zwischen ihnen um einen Abstand geringfügig größer als die ursprüngliche Dicke der Seitenwand des Behälters aufrechterhalten wird.
  10. Verfahren nach Anspruch 9, wobei eine fortgeführte radial nach innen gerichtete formgebende Bewegung nach einem vorbestimmten Punkt, an dem sich das Metall der Seitenwand des Behälters zwischen der Gleitrolle (19) und der konischen Fläche der Formrolle (11) verdickt hat, darin resultiert, daß die Formrolle (11) einen geringfügigen Druck direkt auf das Metall ausübt, wobei sich ein Spalt zwischen der Formrolle (11) und der Nockenstößelfläche öffnet, so daß die Formrolle nun auf die Gleitrolle drückt durch eine Wirkung über das Metall und nicht über die Nockenstößelfläche.
  11. Verfahren nach Anspruch 10, bei dem, wenn sich das äußerste Ende der Seitenwand des Behälters zwischen die Formrolle (11) und die Gleitrolle (19) bewegt, die Formrolle die Nockenstößelfläche noch einmal berührt, so daß der Rollkontakt zwischen der Formrolle und der Gleitrolle den Rand des offenen Endes nicht übermäßig ausdünnt.
  12. Verfahren nach Anspruch 10, wobei der gesamte formgebende Vorgang etwa 20 - 24 Umdrehungen des Behälters erfordert.
EP93112667A 1992-08-14 1993-08-06 Vorrichtung und Verfahren zum Einhalsen von Dosen mittels Fliessdrücken Expired - Lifetime EP0582984B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US929933 1992-08-14
US07/929,933 US5245848A (en) 1992-08-14 1992-08-14 Spin flow necking cam ring
US07/929,932 US5282375A (en) 1992-05-15 1992-08-14 Spin flow necking apparatus and method of handling cans therein
US929932 1997-09-15

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EP0582984B1 true EP0582984B1 (de) 1996-09-25

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US11565304B2 (en) 2018-02-27 2023-01-31 Belvac Production Machinery, Inc. Method and apparatus for clamping a container during processing operations

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US5813267A (en) * 1996-02-28 1998-09-29 Crown Cork & Seal Company, Inc. Methods and apparatus for reducing flange width variations in die necked container bodies
JP6078723B2 (ja) * 2014-12-19 2017-02-15 株式会社高桑製作所 へら絞りによる二重金属部材の製造方法、および、へら絞りによる二重金属部材の製造方法により製造した二重金属部材、ならびに、そのためのへら絞り用金型
CN107433305B (zh) * 2016-05-26 2020-02-07 佛山市定中机械有限公司 一种行星式多头螺纹金属罐成型设备
CN118176617A (zh) * 2022-05-20 2024-06-11 宁德时代新能源科技股份有限公司 缩颈方法、缩颈装置及电池制造设备

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US4781047A (en) * 1983-10-14 1988-11-01 Ball Corporation Controlled spin flow forming
DE3715917A1 (de) * 1987-05-13 1988-12-01 Niemsch Otto Lanico Maschbau Maschine zum beiderseitigen boerdeln und einziehen zylindrischer dosenruempfe
US4870847A (en) * 1988-05-20 1989-10-03 Ihly Industries, Inc. Method and apparatus for forming outwardly projecting beads on cylindrical objects
JPH03165939A (ja) * 1989-11-22 1991-07-17 Kuwabara Yasunaga ネツクイン加工装置

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Publication number Priority date Publication date Assignee Title
US11565304B2 (en) 2018-02-27 2023-01-31 Belvac Production Machinery, Inc. Method and apparatus for clamping a container during processing operations
US11931792B2 (en) 2018-02-27 2024-03-19 Belvac Production Machinery, Inc. Method and apparatus for clamping a container during processing operations

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EP0582984A1 (de) 1994-02-16
MX9304844A (es) 1994-02-28
KR940003634A (ko) 1994-03-12
ATE143298T1 (de) 1996-10-15
BR9303051A (pt) 1994-03-01
CA2104062C (en) 1996-03-26
JPH06210379A (ja) 1994-08-02
DE69305029T2 (de) 1997-02-20
AU664007B2 (en) 1995-10-26
AU4193293A (en) 1994-02-17
DE69305029D1 (de) 1996-10-31
CA2104062A1 (en) 1994-02-15

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