EP2708151A1 - Verfahren zur Herstellung von miteinander verbundenen Elementen eines Reißverschlusses - Google Patents

Verfahren zur Herstellung von miteinander verbundenen Elementen eines Reißverschlusses Download PDF

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Publication number
EP2708151A1
EP2708151A1 EP12184083.9A EP12184083A EP2708151A1 EP 2708151 A1 EP2708151 A1 EP 2708151A1 EP 12184083 A EP12184083 A EP 12184083A EP 2708151 A1 EP2708151 A1 EP 2708151A1
Authority
EP
European Patent Office
Prior art keywords
elements
interconnecting
punching
sheet
slide fastener
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.)
Withdrawn
Application number
EP12184083.9A
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English (en)
French (fr)
Inventor
Vasco Zagaglia
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.)
Riri SA
Original Assignee
Riri SA
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 Riri SA filed Critical Riri SA
Priority to EP12184083.9A priority Critical patent/EP2708151A1/de
Priority to US14/024,998 priority patent/US20140068898A1/en
Priority to CN201310415122.2A priority patent/CN103658447A/zh
Publication of EP2708151A1 publication Critical patent/EP2708151A1/de
Withdrawn legal-status Critical Current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
    • B21D53/00—Making other particular articles
    • B21D53/46—Making other particular articles haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples
    • B21D53/50—Making other particular articles haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples metal slide-fastener parts
    • B21D53/52—Making other particular articles haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples metal slide-fastener parts fastener elements; Attaching such elements so far as this procedure is combined with the process for making the elements
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/02—Slide fasteners with a series of separate interlocking members secured to each stringer tape
    • A44B19/04—Stringers arranged edge-to-edge when fastened, e.g. abutting stringers
    • A44B19/06—Stringers arranged edge-to-edge when fastened, e.g. abutting stringers with substantially rectangular members having interlocking projections and pieces
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/42—Making by processes not fully provided for in one other class, e.g. B21D53/50, B21F45/18, B22D17/16, B29D5/00
    • A44B19/44—Securing metal interlocking members to ready-made stringer tapes
    • A44B19/46—Securing separate interlocking members
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/24—Details
    • A44B19/40—Connection of separate, or one-piece, interlocking members to stringer tapes; Reinforcing such connections, e.g. by stitching
    • A44B19/403—Connection of separate interlocking members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/25—Zipper or required component thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49782—Method of mechanical manufacture of a slide fastener
    • Y10T29/49785—Method of mechanical manufacture of a slide fastener of interlocking element

Definitions

  • the invention relates to the manufacture of interconnecting elements for a slide fastener (zip fastener).
  • the invention in particular relates to the manufacture of interconnecting elements which have a complex shape, for aesthetic purposes or for personalization of the slide fastener.
  • a slide fastener as known comprises essentially two flanking strips which carry respective rows of interconnecting elements, commonly called teeth or tines, and a slider for engaging and disengaging the aforementioned elements.
  • the fastener may also comprise a top stop and a bottom stop for stopping the slider.
  • Punching is a widely used technique for manufacturing interconnecting elements, especially if they are made of a metallic material.
  • the prior art in the field essentially envisages that each element is punched as a single piece from a flat metal sheet, also termed plate.
  • Punching is generally performed in several stages; prior to punching and associated separation from the sheet, it is also known to make some machining steps involving a plastic deformation of the strip, such as drawing or coining, in order to obtain particular shapes, such as projections and recesses for engagement between one element and another.
  • a major advantage of the punching process is the provision of huge production volumes at a low cost.
  • a punching press can perform thousands of strokes per minute and produce tens of teeth per stroke. This remarkable productivity is highly appreciated in the manufacture of items like teeth of a slide fastener, which have small dimensions and are produced in a large number.
  • materials such as brass, which are unsuitable for other processes (e.g. injection moulding) and for which punching is particularly suitable. Punching from a brass strip is common in the field.
  • punching Another limitation of punching consists in the difficulty of punching a strip with a large thickness.
  • punching is used normally for a small thickness, usually not greater than about 1-1.5 mm; punching from a strip of large thickness (e.g. > 2 mm) is difficult and may cause deformation of the teeth. This deformation may be unpleasant and/or may adversely affect operation.
  • the technical problem forming the basis of the invention emerges even more clearly when considering Figs. 8 and 9 which show an interconnecting element or tooth 100 punched according to the prior art.
  • the tooth 100 comprises a head portion 101 intended to engage with another tooth by means of a projection 103 and an opposite recess 104, said projection and recess being obtained by plastic deformation of the plate.
  • the base portion comprises two arms 102 which may be crimped onto a peripheral edge of the flanking strip.
  • Broken lines in Fig. 9 indicate the sheet of material B; the working direction of the cutting punch is indicated by the arrow T.
  • the element 100 may be conveniently shaped only in the direction perpendicular to the plane of the metal sheet, for example making the projection 103 and the recess 104 shown in the figure.
  • This means that the teeth have necessarily an engaging direction (that is the sliding direction of the slider in the finished fastener) which is parallel to the punching direction T ( Fig. 9 ), leaving the smooth surfaces 105 visible.
  • a processing as seen in Fig 9 is applicable in practice only when the plate thickness is small (about 1 mm), thus having a limited versatility.
  • the invention is aimed to solve the abovementioned problem by providing a method for manufacturing interconnecting elements for a slide fastener, by means of which it is possible to obtain elements with complex three-dimensional shapes, while maintaining the production capacity and the low costs of the known process of punching from a flat sheet.
  • the idea underlying the invention is to obtain, by means of punching, parts forming a half of a single interconnecting element. This ensures a greater freedom in definition of the shape of the elements, compared to punching in a single piece.
  • the aim of invention is therefore achieved by means of a method for manufacturing interconnecting elements for a slide fastener, characterized in that it comprises the steps of:
  • said sheet of material is a flat sheet or plate with a rectangular cross-section.
  • the method comprises preferably one or more steps of plastic deformation of said sheet of material, in order to define the geometry of the half-elements prior to punching step and corresponding separation from the sheet.
  • the geometry of the half-elements is defined while respecting the necessary aesthetic and functional constraints (meshing).
  • surfaces of the half-elements are formed on the sheet with a suitable pitch (relative distance) by means of coining, drawing or other machining operations which precede final punching of the workpiece (half-element).
  • the punching is performed in a heightwise direction of the interconnecting element, said heightwise direction being defined as a front-rear direction of the slide fastener, which is perpendicular to the plane of the flanking strips when the element is applied to the fastener itself.
  • punching defines a flat bottom face of the half-elements which corresponds to a bottom face of the sheet and which can be used for the joining.
  • the joining plane of two half-elements is preferably a middle plane which coincides with the plane of the flanking strips of the slide fastener and is also substantially parallel to the direction of engagement of the teeth and sliding direction of the slider.
  • the half-elements are identical to each other.
  • first half-elements and second half-elements with a different, preferably symmetrical, shape are produced, each element being formed by joining a first half-element with a second half-element.
  • the first half-elements and the second half-elements may be obtained, respectively, from a first and a second sheet of material along separate punching lines and then fed to a joining machine or line.
  • Joining the pairs of half-elements is performed preferably with one of the following techniques, which are indicated by way of a non-exhaustive example: welding; brazing; gluing; mechanical fixing.
  • Conventional welding (without any filler material) may be applied for example by performing a spot-welding.
  • Brazing is performed using a filler material with a lower melting point than material of the teeth, and is particularly preferred because it does not cause local melting of the teeth, nor does it modify their shape, which as is known must be precise to ensure operation and smooth action of the slide fastener.
  • Mechanical fixing if used, may be performed for example using screws, rivets or cusps/seats. Mechanical fixing may be preferred for elements of a large size.
  • the material of the interconnecting elements may be any material suitable for punching. Particularly preferred are metallic materials or metal alloys suitable for punching, including brass or even silver and gold, for use in exceptional luxury articles.
  • pairs of half-elements may be followed by further finishing operations which hence are carried on the already formed interconnecting elements, and which may comprise galvanization, polishing or other.
  • the interconnecting elements may have complex three-dimensional shapes, practically without limitation, while continuing to use the punching process and the related advantages of high productivity and low cost.
  • the half-elements can be made with a complex shape, comprising inclined surfaces, curved surfaces, parts tapered from bottom to top, etc. If punching the interconnecting elements as single pieces, as in the prior art, these shapes would not be possible.
  • the invention does not require the use of a shaped sheet, but on the contrary allows realization of sophisticated shapes starting from a flat strip, owing to the manufacture of the elements as two halves.
  • Another advantage consists in that, by punching the half-elements separately and subsequently joining them together, it is possible to provide interconnecting elements with a size (corresponding to the thickness of the original strip) which is twice that possible with the prior art, for a given maximum thickness compatible with the punching.
  • the invention therefore expands the possibilities of aesthetic personalization of the slide fastener, while maintaining a low industrial cost and a proven and reliable process, that is the punching process. This will emerge more clearly hereinbelow, with the aid of examples which are shown by way of a nonlimiting example.
  • Fig. 1 shows a typical slide fastener or zip fastener indicated generally by 10.
  • the slide fastener 10 comprises two flanking strips 12 with rows 13 of interconnecting elements (teeth) 14.
  • a slider 15 and a top stop 16 are also shown.
  • the height of an interconnecting element 14 is defined as the dimension of the element in an inner-to-outer direction H of the slide fastener, which is perpendicular to the plane of the flanking strips 12 when the slide fastener is ideally arranged as shown in Fig. 1 .
  • the length L of an element 14 is defined in a transverse direction of the flanking strips 12, and the width W of an element is defined in the longitudinal direction of the flanking strips 12 ( Fig. 1A ).
  • the interconnecting elements 14 are each made by joining together two half-elements obtained by means of punching from a sheet or plate which is advantageously flat.
  • Figs. 2-4 show a half-element 20 according to one of the modes of implementing the invention.
  • Said half-element 20 comprises essentially a flat bottom face 21 ( Fig. 4 ) which defines a joining plane for joining with another half-element; a head portion 22, a root portion 23, a top face 24 and tapered sides 25.
  • the head portion 22 of the half-element is intended to form (together with another half-element) the head of the interconnecting element 14 that is the part intended for meshing.
  • the root portion 23 is intended to form the base of the element that is the part for fixation to flanking strips 12.
  • the sides 25 are tapered in the heightwise direction H of the half-element 20, perpendicular to the flat bottom face 21.
  • Fig. 3 shows the punching edge 26, the punching being performed perpendicularly to the plane of said Fig. 3 .
  • the complex shape of the half-element 20, in particular the sides 25 and the root portion 23, is generated by means of plastic-deformation machining performed directly on the sheet before punching and/or by means of suitable shaping of the cutting punch and die.
  • the root portion 23 may be shaped by means of coining the sheet from below.
  • Fig. 5 shows an example of an interconnecting element or tooth 14 obtained by joining together two half-elements 20.
  • the element 14 has a head portion 30 and a substantially Y-shaped root portion 31, with two arms 32 to be crimped onto the flanking strips 12 or onto a suitable cord, in accordance with details which are known per se.
  • the faces 24, which are defined by the tapering of the sides 25, have practically a free shape, which may have an aesthetic function, reproducing for example a logo, a brand name or part thereof.
  • Fig. 5 relates to an embodiment in which the two half-elements 20 are identical, but are slightly staggered, such that the head of the tooth has laterally a projection 33 and a recess 34.
  • the two half-elements which form a tooth 14 may be identical or different from each other, preferably symmetrical.
  • Fig. 6 is a block diagram illustrating a mode for manufacturing a slide fastener according to the invention.
  • Block 50 represents the manufacture of suitably shaped half-elements 20 by means of punching from a flat sheet of material, for example brass.
  • Block 51 represents the joining together of pairs of half-elements 20 using a suitable technique such as brazing, welding, gluing, mechanical fixing or other technique.
  • Block 52 represents one or more treatments for finishing the elements 14 thus obtained, such as coating, polishing, etc., which may be performed depending on the requirements.
  • Block 53 represents the application of the finished elements onto the flanking strips 12.
  • Fig. 7 shows a variant where each interconnecting element 14 is formed by two half-elements 20a, 20b with a non-identical shape, which are for example symmetrical.
  • the elements 20a, 20b may be produced separately using two punching lines 50a, 50b and converge in a joining line 51.
  • Said line 51 for example comprises a suitable matrix or template which allows correct positioning of an element 20a and an element 20b for joining together, for example by means of brazing, gluing, etc.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Slide Fasteners (AREA)
EP12184083.9A 2012-09-12 2012-09-12 Verfahren zur Herstellung von miteinander verbundenen Elementen eines Reißverschlusses Withdrawn EP2708151A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12184083.9A EP2708151A1 (de) 2012-09-12 2012-09-12 Verfahren zur Herstellung von miteinander verbundenen Elementen eines Reißverschlusses
US14/024,998 US20140068898A1 (en) 2012-09-12 2013-09-12 Process for the fabrication of interconnecting elements for a slide fastner
CN201310415122.2A CN103658447A (zh) 2012-09-12 2013-09-12 用于拉链的互连元件的制造过程

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12184083.9A EP2708151A1 (de) 2012-09-12 2012-09-12 Verfahren zur Herstellung von miteinander verbundenen Elementen eines Reißverschlusses

Publications (1)

Publication Number Publication Date
EP2708151A1 true EP2708151A1 (de) 2014-03-19

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EP12184083.9A Withdrawn EP2708151A1 (de) 2012-09-12 2012-09-12 Verfahren zur Herstellung von miteinander verbundenen Elementen eines Reißverschlusses

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US (1) US20140068898A1 (de)
EP (1) EP2708151A1 (de)
CN (1) CN103658447A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107752237B (zh) * 2016-08-23 2024-03-08 Ykk株式会社 链牙、链带及拉链
USD1022795S1 (en) * 2021-08-23 2024-04-16 Ykk Corporation Chain for slide fastener

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955247A (en) * 1973-12-29 1976-05-11 Yoshida Kogyo Kabushiki Kaisha Slide fastener element construction
US4312102A (en) * 1979-04-26 1982-01-26 Yoshida Kogyo K K Sealing slide fastener stringer
US20070163091A1 (en) * 2000-07-11 2007-07-19 Crelux Holding S.A. Sealing slide fastener with teeth welded onto the tapes which they join
CN101152658B (zh) * 2006-09-27 2010-10-06 东莞大兴拉链厂有限公司 一种雕花金属拉链的制造工艺及其成型模具
WO2011070678A1 (ja) * 2009-12-11 2011-06-16 Ykk株式会社 ファスナーストリンガー及びスライドファスナー、並びにファスナーストリンガーの補修方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2803739B2 (ja) * 1993-01-29 1998-09-24 ワイケイケイ株式会社 スライドファスナー用務歯および務歯成形方法
CN1320969C (zh) * 2004-09-15 2007-06-13 朱国光 一种拉链链牙的制作方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955247A (en) * 1973-12-29 1976-05-11 Yoshida Kogyo Kabushiki Kaisha Slide fastener element construction
US4312102A (en) * 1979-04-26 1982-01-26 Yoshida Kogyo K K Sealing slide fastener stringer
US20070163091A1 (en) * 2000-07-11 2007-07-19 Crelux Holding S.A. Sealing slide fastener with teeth welded onto the tapes which they join
CN101152658B (zh) * 2006-09-27 2010-10-06 东莞大兴拉链厂有限公司 一种雕花金属拉链的制造工艺及其成型模具
WO2011070678A1 (ja) * 2009-12-11 2011-06-16 Ykk株式会社 ファスナーストリンガー及びスライドファスナー、並びにファスナーストリンガーの補修方法

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US20140068898A1 (en) 2014-03-13
CN103658447A (zh) 2014-03-26

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