EP0283059A1 - Verfahren und Vorrichtung zum Herstellen eines Körpers mit einem Deckelverschlussring, der hergestellte Körper und die Vorform - Google Patents

Verfahren und Vorrichtung zum Herstellen eines Körpers mit einem Deckelverschlussring, der hergestellte Körper und die Vorform Download PDF

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Publication number
EP0283059A1
EP0283059A1 EP88200212A EP88200212A EP0283059A1 EP 0283059 A1 EP0283059 A1 EP 0283059A1 EP 88200212 A EP88200212 A EP 88200212A EP 88200212 A EP88200212 A EP 88200212A EP 0283059 A1 EP0283059 A1 EP 0283059A1
Authority
EP
European Patent Office
Prior art keywords
core
constriction
locking ring
annular
cover locking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88200212A
Other languages
English (en)
French (fr)
Other versions
EP0283059B1 (de
Inventor
Antonius Wilhelmus Daems
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.)
Thomassen and Drijver Verblifa NV
Original Assignee
Thomassen and Drijver Verblifa NV
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 Thomassen and Drijver Verblifa NV filed Critical Thomassen and Drijver Verblifa NV
Publication of EP0283059A1 publication Critical patent/EP0283059A1/de
Application granted granted Critical
Publication of EP0283059B1 publication Critical patent/EP0283059B1/de
Expired 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

Definitions

  • the current invention relates to a method and ap­paratus for manufacturing a body with an integral cover lock­ing ring.
  • the British patent application 2.065.527 describes a method and apparatus for manufacturing a cylindrical body provided with an integrated cover locking ring.
  • the apparatus comprises a punch with two male die members located at a distance from each other.
  • the foremost male die member co-­operates with a female die member and forms with the latter an annular inlet split with a cavity connecting to it, the dimensions of which correspond with a bent inward flange from which the cover locking ring is formed.
  • the rear male die member rests against the other free rim of the body and is intended for the forming thereon of an outward bent flange to which an end wall can be seamed.
  • the forming of a constricted body rim by means of upsetting in the manner described leads in many circumstances to deformations, folding in particular, from the moment that the end wall enters the inlet split and has to be bent inward, because the part of the body between the end rims is not supported in any way.
  • the forming of folds already occurs during entry into the annular split when a body is used that is provided with a longitudinal weld seam, because the body thickness is usually greater at the point of the weld seam.
  • German patent application 3.619.322 describes a method of providing bodies with die-necked body rims. To this end the bodies are cut, which results in cut, inward or out­ward bent body rims being formed which are subsequently pro­vided with a constricted part in a separate die-necking device (by means of so-called die-necking).
  • the die-necking is again performed by upsetting, whereby for example as a result of burrs occurring at the cut body rim deformations can arise in the body.
  • the invention has for its object to manufacture bodies with an integrated cover locking ring, whereby a con­stricted body rim in which the cover ring is subsequently formed is not created by means of an upsetting process but by means of a radial, inward directed forcing process in a pre-­body resulting in the forming of an annular constriction, following which the pre-body is divided at the point of the constriction; in this way the problems resulting from defor­mations in the body as described above will substantially not occur.
  • an axial pressure force has to be applied to the pre-body during the forcing.
  • the invention provides a method for manufacturing a body with an integral cover locking ring comprising (1) the provision of a cylindrical pre-body, the length of which is substantially at least twice the length of the body; (2) the fitting of the pre-body to a core which is provided with at least one annular recess; (3) rotation of the pre-body on the core while applying an axial pressure force on the pre-body; (4) the applying of a radial compression force on the pre-body at the point of the recess using a constricting roller, such that a constriction is forced in the pre-body; (5) division of the pre-body at the point of the constriction; and (6) the forming of a cover locking ring in the constricted body rim.
  • the pre-body is rotated on the core at a speed of 400-1000 revolutions per minute, and in addition that the radius of the constricting roller preferably amounts to 3-8 mm.
  • pre-bodies with a longitudinal weld seam can also be provided with a forced constriction.
  • the invention further provides an apparatus which is particularly designed to perform the above described method according to the invention.
  • This apparatus for forcing at least one annular constriction in a pre-body comprises (1) a core supported by a frame for the accommodation thereon of a cylindrical pre-body, which core is provided with at least one annular recess; (2) means for applying an axial pressure force to the pre-body accommodated on the core; (3) means for rotating the core; (4) a constricting roller mounted for pivoting on the frame in a plane through the recess, which roller can exert a radial compression force on the pre-body accommodated on the core; and (5) means for dividing the pre-­body at the point of the constriction.
  • Pre-bodies can be accommodated easily and quickly in the apparatus and the formed bodies provided with a con­stricted part can easily be removed therefrom, if more preferively the core is divided up into a first core and a second core and if in the free peripheral edge of the first core an annular notch is arranged which forms, together with the end wall of the second core directed towards it, the annular recess.
  • the frame is provided with a shaft end part to be driven with the rotation means and to which the first core is guided for sliding, and the second core is mounted for rotation to another shaft end part supported by a support which is reproducibly guided relative to the first core in a guiding of the frame, such that a part of the first shaft end part protruding from the first core passes through a complem­entary coaxial passage in the second core.
  • the core is provided with stops co-operating with the end edges of the pre-body, it is possible to manufac­ture bodies provided with a constricted body rim which are provided at their other body rim with a curl to which an end wall can be directly seamed.
  • the optimal ratio between the axial pressure force and the radial compression force can easily be determined experimentally.
  • the axial pressure force determines to a significant extent the flow behaviour of the pre-body material during forcing. Too great an axial pressure force leads how­ever to fold deforming in the annular recess and, possibly as a reaction to this, to outward directed deformations. Too small an axial pressure force during the forcing of the body produces excessive stretching forces which can result in cracks occurring at the point of the constriction to be form­ed.
  • the radius of the constricting roller is preferably 3-8 mm. To small a radius induces ridge forming and so-called additional grooving.
  • the invention further relates to a body provided with a cover locking ring joined integrally thereto, to a body provided with a constricted body rim to be formed to an integral cover locking ring, and to a pre-body intended for manufacture of such a body.
  • Fig. 1 and 2 show the first method step according to the invention, whereby in a pre-body 3 a constriction 4 is forced, which eventually forms part of the required constric­ted body rim 5 of body 6.
  • the constricting device 7 comprises a first core 8 which is guided for sliding on a shaft end part 10 provided with a guide rib 9.
  • the first core 8 can be pressed counter to the spring force of a spring 11 to a spring support 12 to which shaft end part 10 is attached and which is driven for rotation by the motor 13.
  • First core 8 is provided at its free end 14 with an annular recess 15 and at its other end 16 with a stop 17.
  • first core 8 Co-operating with first core 8 is a second core 18, which is guided for sliding with a bushing 19 over a spring box 21 counter to the spring force of a spring 20.
  • Spring box 21 is coupled to a shaft end part 22, which is supported for free rotation on a support 24 by means of bearings 23. This support 24 is guided in a guiding 25 for reciprocal movement relative to the first core 8.
  • Studs 26 reach into slotted holes 27 arranged in bushing 19 and bound the sliding movement of bushing 19 over spring box 21 in the direction towards the first core 8.
  • the second core 18 is provided on its end facing away from the free end 28 with a stop 29.
  • a pre-body 3 is placed on the first core 8 and the second core 18 is then moved toward the first core 8, whereby shaft end part 10 passes through a complementary passage 30 in second core 18. In this way core 8 and core 18 are synchronously driven by the rotatably driven shaft end part 10.
  • a constricting roller 34 (radius 4mm), arranged for free rotation in a fork 32 using bearings 33, is subsequently pressed against pre-body 3, this at a position located at the point of recess 15.
  • pre-body 3 is rotated, for example at 800 revolutions per minute, and the diameter at the point of constriction 4 is reduced by forcing from 99 to 83 mm, with a can thickness of 0.23 mm, and a constricting time of approximately 30 seconds.
  • Fig. 3 shows the next method step, whereby, using a cutting roller 37 arranged for free rotation in a fork 35 using bearings 36, pre-body 3 is divided at the point of constriction 4 into two identical bodies 5 since the cut is made at the point of the half-height of pre-body 3.
  • Fig. 4A and 4B show the forming device 38 with which the constricted body rim 5 of body 6 is formed to a cover locking ring 2 integrally connected with body 6, for example a so-called ES-closure, PAL-closure or PALOS-closure.
  • Forming device 38 comprises an annular female die member 40 which is substantially V-shaped in section, is arranged on a stationary punch support 39 and co-operates with a male die member 41.
  • male die member 41 is guided for sliding on a punch 44 reciprocally movable towards punch support 39.
  • Male die member 41 is further provided with an annular socket coupling 45 which slides over body 6 and counters bellying out at the point of the cover locking ring 2 during the forming of said ring.
  • a bottom end wall 46 can be seamed to a curl 31 in known manner (fig. 5).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Tires In General (AREA)
  • Mechanical Operated Clutches (AREA)
  • Closures For Containers (AREA)
EP19880200212 1987-02-11 1988-02-05 Verfahren und Vorrichtung zum Herstellen eines Körpers mit einem Deckelverschlussring, der hergestellte Körper und die Vorform Expired EP0283059B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8700333A NL8700333A (nl) 1987-02-11 1987-02-11 Werkwijze voor het vervaardigen van een romp met een dekselklemring, de vervaardigde romp en een voorromp daarvoor.
NL8700333 1987-02-11

Publications (2)

Publication Number Publication Date
EP0283059A1 true EP0283059A1 (de) 1988-09-21
EP0283059B1 EP0283059B1 (de) 1992-04-22

Family

ID=19849556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880200212 Expired EP0283059B1 (de) 1987-02-11 1988-02-05 Verfahren und Vorrichtung zum Herstellen eines Körpers mit einem Deckelverschlussring, der hergestellte Körper und die Vorform

Country Status (5)

Country Link
EP (1) EP0283059B1 (de)
DE (1) DE3870290D1 (de)
DK (1) DK167382B1 (de)
IE (1) IE60838B1 (de)
NL (1) NL8700333A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4106110A1 (de) * 1990-05-23 1991-11-28 Zuechner Blechwaren Metallverpackung mit siegelbarem profilrand

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190900910A (en) * 1909-01-14 1910-02-14 William Waller Improvements in or connected with the Manufacture of Channelled Tins or Cans for Sealing with Solder.
FR1552950A (de) * 1967-06-24 1969-01-10
GB2065527A (en) * 1979-12-11 1981-07-01 Malaguena Metalgrafica Method and apparatus for forming the mouth rim of a resealable can
DE3619322A1 (de) * 1985-06-10 1986-12-11 Hokkai Can Co., Ltd., Tokio/Tokyo Verfahren zur herstellung von an den enden verjuengten dosenrohren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190900910A (en) * 1909-01-14 1910-02-14 William Waller Improvements in or connected with the Manufacture of Channelled Tins or Cans for Sealing with Solder.
FR1552950A (de) * 1967-06-24 1969-01-10
GB2065527A (en) * 1979-12-11 1981-07-01 Malaguena Metalgrafica Method and apparatus for forming the mouth rim of a resealable can
DE3619322A1 (de) * 1985-06-10 1986-12-11 Hokkai Can Co., Ltd., Tokio/Tokyo Verfahren zur herstellung von an den enden verjuengten dosenrohren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4106110A1 (de) * 1990-05-23 1991-11-28 Zuechner Blechwaren Metallverpackung mit siegelbarem profilrand

Also Published As

Publication number Publication date
EP0283059B1 (de) 1992-04-22
DK63788A (da) 1988-08-12
DK63788D0 (da) 1988-02-08
IE60838B1 (en) 1994-08-24
DE3870290D1 (de) 1992-05-27
DK167382B1 (da) 1993-10-25
NL8700333A (nl) 1988-09-01
IE880361L (en) 1988-08-11

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