WO1992004143A1 - Ensemble de formation de domes pour conteneurs metalliques utilisant une source d'azote pressurise - Google Patents

Ensemble de formation de domes pour conteneurs metalliques utilisant une source d'azote pressurise Download PDF

Info

Publication number
WO1992004143A1
WO1992004143A1 PCT/US1990/005055 US9005055W WO9204143A1 WO 1992004143 A1 WO1992004143 A1 WO 1992004143A1 US 9005055 W US9005055 W US 9005055W WO 9204143 A1 WO9204143 A1 WO 9204143A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamp ring
former die
cylinder means
domer
cylinder
Prior art date
Application number
PCT/US1990/005055
Other languages
English (en)
Inventor
Roger L. Kobak
Original Assignee
Preferred Machining Corporation
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 Preferred Machining Corporation filed Critical Preferred Machining Corporation
Priority to PCT/US1990/005055 priority Critical patent/WO1992004143A1/fr
Priority to US07/847,016 priority patent/US5272902A/en
Publication of WO1992004143A1 publication Critical patent/WO1992004143A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B44B5/026—Dies
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/30—Deep-drawing to finish articles formed by deep-drawing

Definitions

  • This invention relates to can oottora forming apparatus; and more particularly relates to a novel and improved domer assembly and fluidized nitrogen pressure source therefor in bottom forming of a metal container.
  • Background and Field of Invention In metal can manufacturing operations, the bot- torn of the can is customarily formed with a domer assembly in which a ram-mounted metal can blank is forced in suc ⁇ cession against a clamp ring and domer tool to form an outer peripheral beveled or radiused edge in surrounding relation to a domed portion. In doming operations, it is important to establish a differential between the reaction force for resisting movement of the clamp ring and that required for resisting movement of the dome forming tool.
  • tne force of the ram will overcome the reaction force of the clamp ring to cause the clamp ring to be retracted; and then will continue to force the bottom of tne can against the domer tool to result in an upwardly dome-shaped configuration in tne oottom wall of tne can.
  • "Overstroking" occurs as the ram completes its working stroke prior to its return stroke and is important in causing the ram to bottom out at the end of the stroke tc complete formation of the dome in the bottom wall of tne can.
  • nitrogen gas is proposed as merely one type of fluidic pressure source in a different type of forming operation than the doming operation of this invention but in which the pressure exerted across an outer forming ring is higher than that applied across an inner concentric forming pad; and the fluid pressure is utilized more to load a mechanical spring which in turn applies the force to a knock-out lift ring to remove the formed can end.
  • such generating means are mounted internally a a unitary part of the domer assembly and require disassembly of the entire installation for repair or replacement.
  • closer toler_.: - ces to assure that the overstroking will occur just as the ram bottoms out and prior to its ret-: for the next working stroke; also, that there be a constant predetermined pressure when the ram or punch bot ⁇ toms out.
  • a domer assembly which is so constructed and arranged as not to require disassembly of the entire installation in order to replace or service the reaction force-generating means and specifically in such a way that the generating means can be attached independently to the domer assembly and automatically brought into alignment with the clamp ring and domer tool in performing doming operations. Furthermore, it is desirable to provide for such an installation in which the reaction forces are generated in an axial direction in direct opposition to and in align ⁇ ment with the respective movement of the clamp ring and dome plug. Also, it is important that the domer assembly be readily adjustable for different lengtn domer tools and to make any necessary adjustments in tolerances to achieve the overstroking required " at the bottom or end of each working stroke.
  • Another object of the present invention is to provide in a domer assembly for a novel and improved fluidized pressure source which is removably attached as a self-contained unit after installation of tne domer assembly and is readily accessible for servicing or repla- cement without disassembly of tne entire apparatus.
  • a domer assembly has been devised for forming a bottom wall in a metal container
  • the domer assembly includes a dome former die, a clamp ring in outer concentric relation to the die and means supporting the die and clamp ring for independent axial slidable movement with respect to one another, a punch member supporting the container for move ⁇ ment of the bottom wall successively against the claim ring and former die, and the combination therewith of a fluidized pressure source, former die cylinder means enga- gement with the former die support means to yieldingly resist axial slidable movement of the former die, clamp ring cylinder means in outer surrounding relation to the former die cylinder means to resist axial slidable move ⁇ ment of the clamp ring, and mounting means for attaching the fluidized prssure source, dome plug cylinder means and clamp ring cylinder means, all as a separate self- contained unit independently of the mounting of the domer assembly to an outer housing.
  • the fluidized pressure source is preferably a nitrogen gas pressure source which maintains a constant pressure in a common manifold for the unit
  • the cylinder means includes pistons bearing against push pla ⁇ tes at the respective ends of the former die and clamp ring to yieldingly resist their axial slidable movement when the punch member is driven through each working stroke.
  • the respective cross-sectional areas of the piston are selected to establish the amount of resistance to axial slidable movement of the former die and clamp ring, the abutting end surfaces between the pistons and push plates being in a common plane to simplify the manu ⁇ facture, assembly and disassembly of the entire apparatus.
  • Figure 1 is an end view of a preferred form of domer apparatus in accordance with the present invention
  • Figure 2 is a cross-sectional view taken about lines 2-2 of Figure 1;
  • Figure 3 is a somewhat fragmentary enlarged sec ⁇ tional view illustrating successive stages of the doming operation in accordance witn the present invention. Detailed Description of a Preferred Embodiment
  • Figures 1 and 2 there is illustrated in Figures 1 and 2 a preferred form of domer assembly 10 for forming the bottom wall B in a metal can blank C.
  • the successive stages of formation are illustrated in Figure 3 where, in accordance with conven ⁇ tional practice, the metal can blank C is positioned on a punch member P and driven by a ram, not shown, in an axial direction aligned with the center of the domer assembly 10.
  • the bottom wall B of the blank C will move first into engagement with a clamp ring 12 and, as the clamp ring is retracted under the force of the ram, the bottom wall B will then move into engagement with the end of the dome former die or tool 14 and forced into punch cavity P' in forming a center dome D in the bottom wall B of the bla ⁇ nk.
  • the resistance to axial movement of the clamp ring 12 and dome forming tool 14 be closely controlled so that the reactive force or resistance to axial sliding movement of the clamp ring is maintained at a selected level necessary for forming tne beveled edge E in the bottom wall B, and tne reactive force or resistance across the dome forming tool 14 be at a preset level necessary for forming the dome D to the necessary tolerance and configuration.
  • the dif ⁇ ferential force between tne clamp ring 12 and domer tool 14 will vary according to the specific application, for aluminum and steel can bottom forming operations, a pressure on the order of 1700 lbs.
  • the domer assembly 10 is mounted on a domer bridge 16 of a standard ironing press, not shown, utilized in metal can forming operations.
  • a fluidized pressure source 20 is indepen ⁇ dently mounted as a separate unit to one end of the domer assembly 10 opposite to the punch P.
  • the domer bridge 16 is, in accordance with con- ventional practice, of annular configuration having an internal shoulder 22 for the purpose of supporting flanged end 24 of an outer housing 25.
  • the flanged end 24 is mounted directly to the internal shoulder 22 by bolts 26 extending through aligned bores in the domer bridge 16 and flanged end 24 and arranged in circumferentially spaced relation around the flanged end 24.
  • the outer sleeve or housing 25 is disposed in surrounding relation to an annu ⁇ lar domer housing 28, the latter including a flanged end 29 mounted on the flanged end 24 but separated by an annu ⁇ lar spacer element 30.
  • Hold-down bolts 32 are directed through aligned bores in the flanged end portions 29 and 24 as well as a through bore 34 in the domer bridge l ⁇ and are spaced circumferentially and intermediately between tne bolts 26.
  • the domer housing 28 includes an externally threaded, axial extension 36 to receive a retainer nut 37 for the clamp ring 12, and an annular bearing 38 is disposed between the clamp ring 12 and axial extension 36.
  • the clamp ring 12 is mounted for axial slidaol-. movement against a plurality of circumferentially spaced, axially extending, hardened push rods 40, tne push rods being slidable through axially extending bores 42 in the domer housing.
  • Axially spaced bearings, not snown are inserted in recesses 43 between each push rod and surrounding bore 42.
  • a knock-out ring 45 is disposed in inner con ⁇ centric relation to the clamp ring 12 and yieldingly s-..- ported by spring-loaded knock-out pins 46, each being inserted into a coiled spring 48 so as to oe mounted r.
  • a pusn ring 49 interposed between the ends of the knock-out pins 46 and the clamping ring 45, the knock-out ring 45 having an external shoulder 50 which abuts an internal shoulder on the clamp ring 12, and a reduced extension 53 on the knock-out ring which extends from the shoudler 50 inwardly of and slightly beyond the clamp ring so as to be in the path of travel of the punch P.
  • the clamp ring 12 has an offset portion 55 that forms an external shoulder engaged by the retainer nut 37, and coolant lines 56 and 57 extend radially through the clamp ring 12.
  • the end of the clamp ring facing the punch is notched as at 60 for insertion of a carbide insert 62 having a beveled end surface 63 con ⁇ forming to the desired configuration of the outer peripheral edge E of the can blank C.
  • the domer tool 14 is disposed in a central throughbore symmetrically with respect to the longitudinal axis of the entire domer assembly 10.
  • the tool 14 is of conventional construction including a domer shaft 14' of solid, generally cylindrical configuration and having a spherical or convex end portion 66 on a dome plug 65 which is secured by bolts 67 and disposed in facing relation to the punch P.
  • a marking punch 68 is provided in the convex forming end 66 of the plug 65, and a cap shaft 70 which functions as a push plate is affixed to the opposite squared end 71 of the shaft 14'.
  • the push plate or cap shaft 70 is formed with a shallow cavity in its end sur ⁇ face to receive the inner end 71 of the tool 14, and an annular bushing is interposed between the outer surrounding edge of the push plate 70 and the housing 28.
  • Attaching bolts 74 extend upwardly through the push plate 70 and into aligned counterbores in the end of the tool 14 to firmly attach the push plate to the tool 14.
  • Annular bearing members, not shown, are disposed in the axially spaced recesses 78 formed between the domer tool 14 and inner wall of the housing 28.
  • An annular push plate 80 is disposed in outer concentric relation to the cap shaft 70 to bear against end wall 82 of the domer housing 28.
  • the push plate 80 is of a thickness such that its bottom end surface 83 is substantially aligned with the bottom end surface of the cap shaft 70 prior to or between each doming operation, as illustrated in Figure 1.
  • An outer spacer ring 86 is posi ⁇ tioned in surrounding relation to the push plate 83 and, in combination with a stand-off spacer ring 88, determine the proper spacing between the fluidized pressure source 20 and the push plates 70 and 80.
  • the spacer ring 88 will essentially complete the installation of the domer assembly to the domer bridge by insertion of connecting bolts 90 at circumferentially spaced intervals through the spacer ring 86 and stand-off spacer 88 into aligned bores in the domer bridge.
  • the aligned bores in the domer bridge form continuations of the bores for the outside housing bolts 26.
  • a preferred form of pressure source includes a nitrogen manifold 92 containing a source of nitrogen under pressure and a return line 96 communicates with a reser ⁇ voir 98.
  • the manifold 92 communicates with a central cylinder 94 having a piston 100 abutting the exposed end of the cap shaft 70.
  • the manifold 92 com ⁇ municates witn outer cylinders 102 each having a piston 103 bearing against the push plate 80.
  • Tne central cylinder 94 and its piston 100 are disposed symmetrically with respect to the longitudinal axis of the assembly.
  • the outer cylinders 102 and associated pistons 103 are arranged at equally spaced circumferential intervals around the central cylinder to exert a uniform pressure against the push plate 80.
  • the fluidized pressure source 20 as described is assembled as a self-contained unit to the end of the domer assembly by means of the connecting bolts 90 passing through the manifold but of course isolated from the interior chamber in the manifold.
  • the relative reaction forces established by tne pistons 103 with respect to the piston 100 are regulated by the comparative cross- sectional areas of the piston members 100 and 103, since the nitrogen pressure in each cylinder corresponds to that established in the manifold itself.
  • the reactive forces produced across the pistons 103 are less than that applied across the central piston 100 in order to offer less resistance to movement of the clamp ring than the resistance by piston 100 to movement of the dome tool 14.
  • the nitrogen pressure source and specifically the manifold 92 and cylinders 99 and 102 are connected to the domer assembly 10 by means of the connecting bolts 90.
  • the spacer ring 86 in cooperation with the stand-off 88 establishes the basic spacing or clearance between the nitrogen manifold 92 and push plate 70, 80. This is maintained by the connecting bolts 90 and specifically to position the pistons 100, 103 in abutting relation to the push plates 70, 80 at a predetermined reaction force level.
  • a metal can blank C is positioned on the drive member or punch P and advanced along the central axis of the domer assembly to cause the annular portion E of the bottom of the can to advance into engage ⁇ ment with the clamp ring insert 62.
  • the knock-out ring 45 will be engaged by tne bottom edge of the can in surrounding relation to the cavity P', and the spring- loaded knock-out pin 46 will offer relatively little resistance to movement of the ring 45.
  • continued travel of the punch P in forcing the end portion E against the clamp ring insert will be effectively resisted by the outer pistons 103 acting through the push plate 80 and 5 push rods 40.
  • Tne force of the punch P acting across the clamp ring insert 62 will exceed that of tne pistons 103 to cause a limited degree of travel. As illustrated in Figure 3, this will cause inward pressing of the annual wall portion E to conform to the curvature of the outer 0 peripheral edge of the punch and as a preliminary to move ⁇ ment of the central end portion of the blank C into con ⁇ tact with the dome tool 14.
  • the independent mounting of the nitrogen pressure source as a sel -contained unit greatly fac.ilita- tes servicing and replacement both of the pressure source and of the domer assembly itself.
  • the nitrogen pressure source 20 can be removed without disassembly of any part of the domer assembly 10 with tne possible exception of t e spacer ring 86 ana push plate 80.
  • Any adjustments tnat nave to be made to tne domer assembly, such as, to accommodate different length punches P or domer shafts 14 can be carried out by the simple expedient of removing the retainer nut 37, outer bolts 32 and grinding or replacement of the spacer ring 30 between the housings 24 and 28.
  • the domer shaft can be easily replaced and the same is true of the clamping ring and push rods with a minimum of disturbance to the entire assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Appareil de formation de dômes (10) servant à former un élément de fond bombé dans un corps de boîte (B) et comportant une source d'azote pressurisé (92) qui agit à travers une configuration de cylindres (94, 102) et de pistons (100, 103) pour imposer une résistance prédéterminée au mouvement d'une bague de serrage (12) et d'une matrice de façonnage (14) utilisées dans le procédé de formation de dômes. Dans ledit appareil, la source de pression d'azote (92) est une unité autonome amovible fixée à l'ensemble de formation de dômes (10) qui peut être utilisée et remplacée indépendamment de l'ensemble de formation de dômes.
PCT/US1990/005055 1990-09-06 1990-09-06 Ensemble de formation de domes pour conteneurs metalliques utilisant une source d'azote pressurise WO1992004143A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US1990/005055 WO1992004143A1 (fr) 1990-09-06 1990-09-06 Ensemble de formation de domes pour conteneurs metalliques utilisant une source d'azote pressurise
US07/847,016 US5272902A (en) 1990-09-06 1990-09-06 Domer assembly for metal containers with nitrogen pressure source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1990/005055 WO1992004143A1 (fr) 1990-09-06 1990-09-06 Ensemble de formation de domes pour conteneurs metalliques utilisant une source d'azote pressurise

Publications (1)

Publication Number Publication Date
WO1992004143A1 true WO1992004143A1 (fr) 1992-03-19

Family

ID=22221028

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1990/005055 WO1992004143A1 (fr) 1990-09-06 1990-09-06 Ensemble de formation de domes pour conteneurs metalliques utilisant une source d'azote pressurise

Country Status (1)

Country Link
WO (1) WO1992004143A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997041978A1 (fr) * 1996-05-04 1997-11-13 Carnaudmetalbox Plc Poste de moulage d'une base
WO1999014000A1 (fr) * 1997-09-16 1999-03-25 Crown Cork & Seal Technologies Corporation Formation du fond d'une boite metallique
KR100396394B1 (ko) * 2000-08-24 2003-09-02 김병두 전기설비의 원격감시 방법
EP3684524A4 (fr) * 2017-09-18 2021-06-09 Ball Corporation Procédé et appareil pour gaufrer et dégaufrer des récipients métalliques

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571978A (en) * 1984-02-14 1986-02-25 Metal Box P.L.C. Method of and apparatus for forming a reinforced can end
US4733550A (en) * 1986-01-29 1988-03-29 Precision Products Of Tennessee, Inc. Apparatus for forming a domed bottom in a can body
US4774865A (en) * 1987-09-22 1988-10-04 Wallis Bernard J Die stamping system
US4815718A (en) * 1985-04-15 1989-03-28 Teledyne Industries, Inc. Self-lubricating die cylinder
US4826382A (en) * 1988-01-11 1989-05-02 Redicon Corporation Method and apparatus for forming container with profiled bottom
US4838527A (en) * 1987-03-03 1989-06-13 Power Components, Inc. Convertible gas spring
US4930330A (en) * 1989-07-27 1990-06-05 Pride Machine Inc. Double action bottom former
US4934230A (en) * 1988-08-24 1990-06-19 Wallis Bernard J Die stamping system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571978A (en) * 1984-02-14 1986-02-25 Metal Box P.L.C. Method of and apparatus for forming a reinforced can end
US4815718A (en) * 1985-04-15 1989-03-28 Teledyne Industries, Inc. Self-lubricating die cylinder
US4733550A (en) * 1986-01-29 1988-03-29 Precision Products Of Tennessee, Inc. Apparatus for forming a domed bottom in a can body
US4838527A (en) * 1987-03-03 1989-06-13 Power Components, Inc. Convertible gas spring
US4774865A (en) * 1987-09-22 1988-10-04 Wallis Bernard J Die stamping system
US4826382A (en) * 1988-01-11 1989-05-02 Redicon Corporation Method and apparatus for forming container with profiled bottom
US4934230A (en) * 1988-08-24 1990-06-19 Wallis Bernard J Die stamping system
US4930330A (en) * 1989-07-27 1990-06-05 Pride Machine Inc. Double action bottom former

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997041978A1 (fr) * 1996-05-04 1997-11-13 Carnaudmetalbox Plc Poste de moulage d'une base
WO1999014000A1 (fr) * 1997-09-16 1999-03-25 Crown Cork & Seal Technologies Corporation Formation du fond d'une boite metallique
EP1068909A1 (fr) * 1997-09-16 2001-01-17 Crown Cork & Seal Technologies Corporation Formation du fond d'une boíte métallique
KR100396394B1 (ko) * 2000-08-24 2003-09-02 김병두 전기설비의 원격감시 방법
EP3684524A4 (fr) * 2017-09-18 2021-06-09 Ball Corporation Procédé et appareil pour gaufrer et dégaufrer des récipients métalliques

Similar Documents

Publication Publication Date Title
US5272902A (en) Domer assembly for metal containers with nitrogen pressure source
US3848452A (en) Die apparatus
US5626048A (en) Method and apparatus for forming cup-shaped members
US7302822B1 (en) Shell press and method for forming a shell
US5857374A (en) Method and apparatus for forming a can shell
US5378205A (en) Extruded metal chain pin
US3673908A (en) Quick-change tooling for fineblanking presses
US6032505A (en) Tooling apparatus and method for high speed production of drawn metal cup-like articles
US3965716A (en) Device for swage-forging shafts
US11597001B2 (en) Ram assembly with removable punch mounting assembly
WO1992004143A1 (fr) Ensemble de formation de domes pour conteneurs metalliques utilisant une source d'azote pressurise
US4262512A (en) Drawing and ironing assembly for bodymaker
US5575170A (en) Tooling apparatus and method for high speed production of drawn metal cup-like articles
US4930330A (en) Double action bottom former
US5802907A (en) Tooling apparatus and method for high speed production of drawn metal cup-like articles
US4589270A (en) Hydraulic bottom former
ES8700986A1 (es) Util de prensa
US20010013240A1 (en) Tool cartridge having an elastic matrix
US4193279A (en) Cup holder assembly
US4604886A (en) Method and apparatus for single step formation of spherical retainer
US5638717A (en) Tooling apparatus for high speed production of drawn metal cup-like articles
US4674314A (en) Method and apparatus for single step formation of spherical retainer
EP0005084A1 (fr) Dispositif pour l'emboutissage et le glaçage de récipients
US4662256A (en) Die set
EP0605978B1 (fr) Outil pour former des couvercles de diamètres différents

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU CA JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BE DE ES FR GB IT NL

NENP Non-entry into the national phase

Ref country code: CA