EP0408520A2 - Verfahren und Maschine zur automatischen Herstellung von Schmuckketten mit 8-förmigen Kettengliedern - Google Patents

Verfahren und Maschine zur automatischen Herstellung von Schmuckketten mit 8-förmigen Kettengliedern Download PDF

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Publication number
EP0408520A2
EP0408520A2 EP90830298A EP90830298A EP0408520A2 EP 0408520 A2 EP0408520 A2 EP 0408520A2 EP 90830298 A EP90830298 A EP 90830298A EP 90830298 A EP90830298 A EP 90830298A EP 0408520 A2 EP0408520 A2 EP 0408520A2
Authority
EP
European Patent Office
Prior art keywords
mesh
chain
group
clamp
link
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
EP90830298A
Other languages
English (en)
French (fr)
Other versions
EP0408520B1 (de
EP0408520A3 (en
Inventor
Pierino Maruffi
Stefano Chiaramonti
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.)
Icm Italiana Costruzioni Metalmeccaniche Srl
Original Assignee
Icm Italiana Costruzioni Metalmeccaniche Srl
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 Icm Italiana Costruzioni Metalmeccaniche Srl filed Critical Icm Italiana Costruzioni Metalmeccaniche Srl
Publication of EP0408520A2 publication Critical patent/EP0408520A2/de
Publication of EP0408520A3 publication Critical patent/EP0408520A3/fr
Application granted granted Critical
Publication of EP0408520B1 publication Critical patent/EP0408520B1/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
    • B21L—MAKING METAL CHAINS
    • B21L7/00—Making chains or chain links by cutting single loops or loop-parts from coils, assembling the cut parts and subsequently subjecting same to twisting with or without welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21L—MAKING METAL CHAINS
    • B21L11/00—Making chains or chain links of special shape
    • B21L11/005—Making ornamental chains

Definitions

  • the present invention relates to a method for forming chains with "eight" shaped links, for necklaces, bracelets, belts and the like, and a machine for carrying it out.
  • the present invention aims to eliminate the aforementioned drawbacks by proposing a method and a machine for mechanically and automatically forming chains with eight-shaped meshes so as to increase the precision, speed and reliability of production and therefore drastically reduce manufacturing costs.
  • a machine for the automatic formation of chains with eight-shaped meshes along said process includes: - Means for blocking the last link in the chain being formed so as to allow passive meshing of a corresponding free and open link; means for the displacement of each free and open mesh obtained from a metal wire folded in an oval helix by means of a "limaquaint group" with transfer to an active mesh position with the last corresponding mesh of the chain and successively and in a successive position, closing and twisting; - Means for closing each free and open stitch after its mesh and cooperation for its twist in eight.
  • FIG. 1 shows an enlarged view of a wire bent into an oval helix for eight-shaped stitches
  • FIG. 2 shows an enlarged view of a free and open mesh, obtained from the propeller of FIG. 1
  • FIG. 3 shows the view of the mesh of FIG. 2, after meshing with the last stitch in a chain already formed
  • FIG. 4 represents the view of the mesh of FIG. 3 after closing
  • FIG. 5 shows the view of the mesh of FIG. 4 after its twist in eight
  • FIG. 1 shows an enlarged view of a wire bent into an oval helix for eight-shaped stitches
  • FIG. 2 shows an enlarged view of a free and open mesh, obtained from the propeller of FIG. 1
  • FIG. 3 shows the view of the mesh of FIG. 2, after meshing with the last stitch in a chain already formed
  • FIG. 4 represents the view of the mesh of FIG. 3 after closing
  • FIG. 5 shows the view of the mesh of FIG. 4 after its twist in eight
  • FIG. 6 shows the front view of a preferred embodiment of a machine for forming chains according to the invention, associated with a snail group for metallic wire in oval helix;
  • FIG. 7 shows the plan view of the machine of FIG. 6;
  • FIG. 8 shows the front view of a variant of the machine of FIG. 6;
  • FIG. 9 shows the plan view of the machine of FIG. 8;
  • FIG. 10 shows the right side view of the variant of FIG. 9.
  • the oval helical mesh 10 of FIG. 2 is detached from a helix 1 made, with known means, using a metal wire, of predetermined nature and diameter, bent into an oval helix, with a pitch slightly greater than twice the diameter of the wire; said mesh is cut so as to obtain a length of approximately 360 ° between the two ends 10a, 10b which are spaced apart and bent in opposition.
  • the process for forming chains with eight-shaped meshes comprises, in sequence, the following phases: - blocking of the last stitch 20 of the chain 2 being formed, holding it by the zone located just below the break 12 and so that it is substantially in a vertical plane and with l 'horizontal longitudinal axis; - Taking of the first turn 10 ′ of the propeller 1, holding it by its central zone, that is to say median 12 and so that it is substantially in a vertical plane and with the longitudinal axis horizontal; - detachment of said turn 10 ′ of the propeller 1 by obtaining an open and free mesh 10; positioning of said free and open link 10 in a horizontal plane with its longitudinal axis substantially orthogonal to that of said blocked link 20 of chain 2 and in such a way that the free ends 10a, 10b are opposite the corresponding loops of mesh 20; - introduction of the two arms separated from the mesh 10 in the loops of the mesh 20, followed by the rotation of approximately 45
  • a machine for implementing said method in accordance with the invention and with reference to FIGS. 6 and 7 of the accompanying drawings includes: - Means for blocking the last link 20 of the chain 2 being formed, with a group 3 carrying a clamp 30 inclined upward, said group being fixed to a support 31 mounted on a vertical shaft 32 rotating and oscillating around a horizontal pivot 37: the shaft 33 of the clamp 30 being slaved to a rocker arm 34 with a plunger 35 and to a spring 36 which control the opening and, respectively, the closing of the clamp 30; - Means for the displacement of each free and open mesh 10, with the taking of the mesh coming from an open mesh forming machine, the active mesh with the last mesh 20 of the chain 2 and the introduction into the means closing and finally its twist in eight, with a group 4 carrying a clamp 40 with rotating horizontal shaft 43, said group being oscillating around a horizontal pivot 45 and sliding horizontally by means of a lever 46: the shaft 43 of the clamp 40 being, moreover, slaved to a rocker
  • a variant of the machine in which said means 4 for moving the open meshes 10 are mounted on a carriage 47 movable horizontally between a position for taking each mesh obtained from the propeller produced by the "limaçon group" and an active mesh position, with the last link in the chain being formed.
  • the limaçon group 6 is positioned at a distance from the vice 50.
  • This solution provides three independent actuators, the first to control the camshafts which determine the movement of the limaçon group 6, the knife group 61 and group 4 in the mesh formation phase; the second actuator for controlling the translation of the carriage 47 with the group 4; the third actuator to control the camshafts which determine the movement of group 3 with the clamp 30, the vice 50 and group 4 in the chain formation phase, this making it possible to have available, for each group , a larger work phase.
  • the clamp 30 abandons the mesh 20, the chain 2 being held by the clamp 40 via the mesh 10 already meshed, but still open.
  • the clamp 40 moves back and turns around its axis so as to position the mesh 10 in a vertical plane, after which it advances until introducing the spaced ends 10a, 10b of the mesh 10 in the jaws of the vice 50; at this moment, the vice closes, closing the mesh and blocking it while the clamp 40, by turning about 140 °, twists it in eight while conforming to the corresponding shortening.
  • the vice 50 opens, the clamp 40 moves back, lowers and presents the mesh 20 thus closed and twisted with the clamp 30 which takes it just below the interruption 12, then rotates it around a vertical axis for the position in the passive mesh position.
  • a machine according to the invention is easily adaptable to any type of oval helix mesh, by simply replacing the interchangeable equipment for measuring the wire and a corresponding adjustment of the means of displacement of the meshes. 10, 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
EP90830298A 1989-07-13 1990-06-28 Verfahren und Maschine zur automatischen Herstellung von Schmuckketten mit 8-förmigen Kettengliedern Expired - Lifetime EP0408520B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8909477A IT1233709B (it) 1989-07-13 1989-07-13 Metodo e macchina per la formazione automatica di catene ornamentali con maglie a forma di otto
IT947789 1989-07-13

Publications (3)

Publication Number Publication Date
EP0408520A2 true EP0408520A2 (de) 1991-01-16
EP0408520A3 EP0408520A3 (en) 1991-06-26
EP0408520B1 EP0408520B1 (de) 1994-06-15

Family

ID=11130732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90830298A Expired - Lifetime EP0408520B1 (de) 1989-07-13 1990-06-28 Verfahren und Maschine zur automatischen Herstellung von Schmuckketten mit 8-förmigen Kettengliedern

Country Status (4)

Country Link
US (1) US5152133A (de)
EP (1) EP0408520B1 (de)
DE (1) DE69009873D1 (de)
IT (1) IT1233709B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20150791A1 (de) * 2015-05-26 2016-11-26
IT201900005420A1 (it) * 2019-04-09 2020-10-09 Gianni Pettenuzzo Macchina automatizzata per la produzione di catene ornamentali e procedimento per la produzione di catene ornamentali

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE257586C (de) *
FR339001A (fr) * 1903-08-25 1904-10-18 Societe A. Spindler Fils Et Cie Machine automatique pour la fabrication de la chaine dite gourmette ou maille tordue
US1479870A (en) * 1922-01-25 1924-01-08 S O Bigney & Company Chain-making machine
GB533269A (en) * 1939-10-26 1941-02-10 William Wiggin Improvements in, and in the manufacture of, chains
IT1204032B (it) * 1986-02-28 1989-03-01 C M S Srl Procedimento per la produzione automatica di catene a maglie ornamentali e relativa apparecchiatura

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20150791A1 (de) * 2015-05-26 2016-11-26
IT201900005420A1 (it) * 2019-04-09 2020-10-09 Gianni Pettenuzzo Macchina automatizzata per la produzione di catene ornamentali e procedimento per la produzione di catene ornamentali
EP3722020A1 (de) 2019-04-09 2020-10-14 Gianni Pettenuzzo Automatische maschine zur herstellung von zierketten und verfahren zur herstellung von zierketten

Also Published As

Publication number Publication date
DE69009873D1 (de) 1994-07-21
EP0408520B1 (de) 1994-06-15
IT8909477A0 (it) 1989-07-13
IT1233709B (it) 1992-04-14
EP0408520A3 (en) 1991-06-26
US5152133A (en) 1992-10-06

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