EP2881193B1 - Die for producing lever arms/clips for sports footwear starting from an aluminium extruded profile provided with extrusion holes - Google Patents

Die for producing lever arms/clips for sports footwear starting from an aluminium extruded profile provided with extrusion holes Download PDF

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Publication number
EP2881193B1
EP2881193B1 EP14194658.2A EP14194658A EP2881193B1 EP 2881193 B1 EP2881193 B1 EP 2881193B1 EP 14194658 A EP14194658 A EP 14194658A EP 2881193 B1 EP2881193 B1 EP 2881193B1
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EP
European Patent Office
Prior art keywords
extruded profile
die
holes
distance
punch
Prior art date
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Application number
EP14194658.2A
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German (de)
French (fr)
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EP2881193A1 (en
Inventor
Elia Voltolina
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.)
Vega SRL
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Vega SRL
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Publication date
Application filed by Vega SRL filed Critical Vega SRL
Priority to RS20160708A priority Critical patent/RS55078B1/en
Publication of EP2881193A1 publication Critical patent/EP2881193A1/en
Application granted granted Critical
Publication of EP2881193B1 publication Critical patent/EP2881193B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43C—FASTENINGS OR ATTACHMENTS OF FOOTWEAR; LACES IN GENERAL
    • A43C11/00—Other fastenings specially adapted for shoes
    • A43C11/14—Clamp fastenings, e.g. strap fastenings; Clamp-buckle fastenings; Fastenings with toggle levers
    • A43C11/1406—Fastenings with toggle levers; Equipment therefor
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/243—Perforating, i.e. punching holes in profiles
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/36—Making other particular articles clips, clamps, or like fastening or attaching devices, e.g. for electric installation

Definitions

  • the present invention relates to a die for producing lever arms/clips for sports footwear starting from an aluminium extruded profile provided with extrusion holes.
  • Lever arms are known obtained by injection moulding in an aluminium or magnesium die.
  • Lever arms are also known obtained by extruding an aluminium bar already provided with holes, which is cut by a sawing machine to form individual lever arms with bevelled cavities and edges.
  • Lever arms are also known in which the holes for the hinge pins are obtained firstly by forming U-shaped seats and then bringing their ends into contact.
  • EP 2 550 888 relates to a method for manufacturing a component of a lever for a closing buckle, comprising the following steps: manufacturing, by means of extrusion of an aluminium alloy billet, an extruded profile extending in a plane XY and provided with at least two ribs suitable for defining a groove.
  • An object of the invention is to eliminate the drawbacks present jointly and individually in known lever arm production dies such as to produce such levers in an easy and comfort manner.
  • Another object of the invention is to provide a die which enables an extruded profile already provided with holes to be processed without deforming them during processing.
  • the die for producing lever arms/clips comprises a die plate 2 shaped in accordance with the lower profile of the extruded profile 18, and a sheet-metal hold-down element 4 provided with grooves into which punches 6, 8, 10, 12 respectively (shown in front and perspective view in Figures 2-9 ) are inserted.
  • the punch 6 has a cross-section suitable to realize the U-shaped portion inside the lever arm, and lowerly has its cutting surface provided with two recesses 14, 14' of distance apart equal to the distance between the holes 16, 16' of the extruded profile 18 into which the pins are inserted for hinging the arm 20 to the fork 22 and the puller 24 to the arm 20 respectively.
  • the distance between the near edges of the two recesses 14, 14' corresponds to the distance between the edges of the holes 16, 16'.
  • the lower cutting surface of the punch 8 has the same characteristics as the cutting surface of the punch 6.
  • the punch 10 has the same cross-section as the punch 6 and has its lower cutting surface 24 shaped as the upper surface of the extruded profile 18, and is also provided with two downwardly projecting appendices 26, 26' having their distance between axes corresponding to the distance between the holes 16, 16' of the extruded profile 18.
  • the punch 12 has a cross-section suitable for forming the two half-edges of the lever arm 20 and has the shape of its cutting surface 28 corresponding to the upper surface of the extruded profile 18, it also comprising two downwardly projecting appendices 30, 30' having their distance apart corresponding to the distance between the appendices 26, 26'.
  • the die according to the invention operates as follows.
  • the aluminium extrusion 18 is positioned on the die plate 2 and the sheet-metal hold-down element 4 is then lowered so that the extrusion is firmly locked.
  • a power hammer (not shown in the drawings) is lowered such that the active lower end of the punches 6, 8, 10, 12 interferes with the extrusion.
  • the following operations are repeatedly implemented by the punches:

Description

  • The present invention relates to a die for producing lever arms/clips for sports footwear starting from an aluminium extruded profile provided with extrusion holes.
  • Lever arms are known obtained by injection moulding in an aluminium or magnesium die.
  • These known arms however are of large thickness compared with levers obtained by extrusion.
  • Lever arms are also known obtained by extruding an aluminium bar already provided with holes, which is cut by a sawing machine to form individual lever arms with bevelled cavities and edges.
  • These known levers have however a low production capacity.
  • Lever arms are also known in which the holes for the hinge pins are obtained firstly by forming U-shaped seats and then bringing their ends into contact.
  • EP 2 550 888 relates to a method for manufacturing a component of a lever for a closing buckle, comprising the following steps: manufacturing, by means of extrusion of an aluminium alloy billet, an extruded profile extending in a plane XY and provided with at least two ribs suitable for defining a groove.
  • An object of the invention is to eliminate the drawbacks present jointly and individually in known lever arm production dies such as to produce such levers in an easy and comfort manner.
  • Another object of the invention is to provide a die which enables an extruded profile already provided with holes to be processed without deforming them during processing.
  • These objects are attained according to the invention by a die for producing lever arms/clips starting from an aluminium extruded profile provided with extrusion holes, as described in claim 1.
  • The present invention is clarified hereinafter in terms of a preferred embodiment and a modified embodiment thereof, with reference to the accompanying drawings, in which:
    • Figure 1 is an exploded perspective view of a lever arm obtained with the die according to the invention,
    • Figures 2, 3, 4, 5, 6, 7 and 8, 9 show respectively in frontal and perspective view the punches used in a first die according to the invention,
    • Figure 10 is a perspective view of the die according to the invention shown open,and
    • Figure 11 shows it closed.
  • As can be seen from the figures, the die for producing lever arms/clips according to the invention comprises a die plate 2 shaped in accordance with the lower profile of the extruded profile 18, and a sheet-metal hold-down element 4 provided with grooves into which punches 6, 8, 10, 12 respectively (shown in front and perspective view in Figures 2-9) are inserted. In particular, the punch 6 has a cross-section suitable to realize the U-shaped portion inside the lever arm, and lowerly has its cutting surface provided with two recesses 14, 14' of distance apart equal to the distance between the holes 16, 16' of the extruded profile 18 into which the pins are inserted for hinging the arm 20 to the fork 22 and the puller 24 to the arm 20 respectively.
  • The distance between the near edges of the two recesses 14, 14' corresponds to the distance between the edges of the holes 16, 16'.
  • The lower cutting surface of the punch 8 has the same characteristics as the cutting surface of the punch 6.
  • The punch 10 has the same cross-section as the punch 6 and has its lower cutting surface 24 shaped as the upper surface of the extruded profile 18, and is also provided with two downwardly projecting appendices 26, 26' having their distance between axes corresponding to the distance between the holes 16, 16' of the extruded profile 18.
  • The punch 12 has a cross-section suitable for forming the two half-edges of the lever arm 20 and has the shape of its cutting surface 28 corresponding to the upper surface of the extruded profile 18, it also comprising two downwardly projecting appendices 30, 30' having their distance apart corresponding to the distance between the appendices 26, 26'.
  • The die according to the invention operates as follows.
  • The aluminium extrusion 18 is positioned on the die plate 2 and the sheet-metal hold-down element 4 is then lowered so that the extrusion is firmly locked.
  • A power hammer (not shown in the drawings) is lowered such that the active lower end of the punches 6, 8, 10, 12 interferes with the extrusion. As a result of repeated blows by the power hammer and step-wise advancement of the extruded profile, the following operations are repeatedly implemented by the punches:
    • the punch 6 punches the zone between the holes 16 and 16' and cuts the extrusion portion such as to define two seats 32, 32' which constitute a partial undercut zone for the future insertion of the puller 24,
    • the punch 8 acts such as to form two channels 34, 34' between the two holes 16, 16',
    • the punch 10 cuts a further extrusion portion to form the U-shaped seat 36 of the puller 24,
    • the punch 12 with the appendices 30, 30' cuts the portion 38 previously remaining between the cavities 34, 34' and the portion which embraces the hole 16, and then cuts the extrusion portion 18 to give the lever arm 20 the desired shape.
  • In the illustrated embodiments, reference is always made to a die for a lever arm. It is apparent that the same die and the same punches (of suitably modified dimensions) can be used to form clips in that, again in this case, the problem solved is that of not deforming the holes during pressing.

Claims (2)

  1. A die for producing lever arms/clips for sports footwear starting from an aluminium extruded profile (18) provided with extrusion holes (16, 16'), comprising:
    - a die plate (2) of cross-section corresponding to the cross-section of the extruded profile (18),
    - at least two punches (6, 8, 10, 12)
    characterised in that one (6, 8) of the punches configured to initially operate in the zone surrounding the holes (16, 16'), and the other (10, 12) of the two punches configured to subsequently operate to cut the profile at the axes of the holes (16, 16').
  2. A die as claimed in claim 1, characterised by comprising four punches:
    - the first (6) of which is provided with two recesses (14, 14'), of distance apart equal to the distance between the holes (16, 16'),
    - the second (8) of which has its cutting surface presenting the same characteristics as the cutting surfaces of the preceding punch,
    - the third punch (10) has the same cross-section as the first punch (6) and has its cutting surface of the same shape as the upper surface of the extruded profile (18) and provided with two downwardly projecting appendices (26, 26') having their distance between axes corresponding to the distance between the holes (16, 16') of the extruded profile,
    - the fourth punch (12) has a cross-section suitable for forming the two half-edges of the lever arm and has the shape of its cutting surface corresponding to the upper surface of the extruded profile, it also comprising two downwardly projecting appendices (30, 30') having their distance apart corresponding to the distance between the appendices (26, 26').
EP14194658.2A 2013-12-04 2014-11-25 Die for producing lever arms/clips for sports footwear starting from an aluminium extruded profile provided with extrusion holes Active EP2881193B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RS20160708A RS55078B1 (en) 2013-12-04 2014-11-25 Die for producing lever arms/clips for sports footwear starting from an aluminium extruded profile provided with extrusion holes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000064A ITVE20130064A1 (en) 2013-12-04 2013-12-04 MOLD FOR REALIZING LEVER / TUBE ARMS FOR SPORT FOOTWEAR STARTING FROM AN EXTRUDED ALUMINUM PROFILE PROVIDED WITH EXTRUSION HOLES.

Publications (2)

Publication Number Publication Date
EP2881193A1 EP2881193A1 (en) 2015-06-10
EP2881193B1 true EP2881193B1 (en) 2016-06-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14194658.2A Active EP2881193B1 (en) 2013-12-04 2014-11-25 Die for producing lever arms/clips for sports footwear starting from an aluminium extruded profile provided with extrusion holes

Country Status (3)

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EP (1) EP2881193B1 (en)
IT (1) ITVE20130064A1 (en)
RS (1) RS55078B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20153719A1 (en) * 2015-09-18 2017-03-18 Vega S R L Method for making lever arms / jumpers for aluminum closing devices for sports shoes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTV20090012U1 (en) * 2009-04-01 2010-10-02 O L M Srl CLOSING HOOK FOR SKI BOOTS (AND OTHER FOOTWEAR).
ITTV20110110A1 (en) * 2011-07-29 2013-01-30 O L M Sportech Srl METHOD OF PRODUCTION OF THE COMPONENTS OF A LEVER FOR A CLOSING HOOK FOR SPORTS SHOES
ITPN20110074A1 (en) * 2011-11-11 2013-05-12 Tecnologica S P A ELEMENT FOR CLAMPING DEVICES IN PARTICULAR FOR SPORTS SHOES AND ITS PRODUCTION PROCEDURE

Also Published As

Publication number Publication date
ITVE20130064A1 (en) 2015-06-05
RS55078B1 (en) 2016-12-30
EP2881193A1 (en) 2015-06-10

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