WO1995001863A1 - Fixation a crochets dos a dos - Google Patents

Fixation a crochets dos a dos Download PDF

Info

Publication number
WO1995001863A1
WO1995001863A1 PCT/US1994/007556 US9407556W WO9501863A1 WO 1995001863 A1 WO1995001863 A1 WO 1995001863A1 US 9407556 W US9407556 W US 9407556W WO 9501863 A1 WO9501863 A1 WO 9501863A1
Authority
WO
WIPO (PCT)
Prior art keywords
molded
fastener component
molding
base member
fastening elements
Prior art date
Application number
PCT/US1994/007556
Other languages
English (en)
Inventor
Gerald F. Rocha
Original Assignee
Velcro Industries, B.V.
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 Velcro Industries, B.V. filed Critical Velcro Industries, B.V.
Priority to AU73230/94A priority Critical patent/AU7323094A/en
Publication of WO1995001863A1 publication Critical patent/WO1995001863A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
    • B29C33/14—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels against the mould wall
    • B29C33/16—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels against the mould wall using magnetic means
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
    • A44B18/0046—Fasteners made integrally of plastics
    • A44B18/0049—Fasteners made integrally of plastics obtained by moulding processes
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
    • A44B18/0069—Details
    • A44B18/0076—Adaptations for being fixed to a moulded article during moulding
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
    • A44B18/0069—Details
    • A44B18/0084—Double-sided
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
    • B29C33/14—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels against the mould wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/222—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length characterised by the shape of the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/44—Compression means for making articles of indefinite length
    • B29C43/46—Rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/681—Component parts, details or accessories; Auxiliary operations
    • B29C70/682—Preformed parts characterised by their structure, e.g. form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/72—Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/44—Compression means for making articles of indefinite length
    • B29C43/46—Rollers
    • B29C2043/461—Rollers the rollers having specific surface features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/44—Compression means for making articles of indefinite length
    • B29C43/46—Rollers
    • B29C2043/461—Rollers the rollers having specific surface features
    • B29C2043/465—Rollers the rollers having specific surface features having one or more cavities, e.g. for forming distinct products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/78—Moulding material on one side only of the preformed part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/727—Fastening elements
    • B29L2031/729—Hook and loop-type fasteners

Definitions

  • the invention relates to hook components that are used as part of a hook and loop fastening system.
  • the invention relates to hook components that can be used in insert molding processes, or as a coupler between two loop components.
  • a fastener component typically a hook component
  • a hook component is integrally molded into a part such that the fastening elements of the component are exposed above the surface of the part.
  • Another part carrying the mating fastener component e.g. the loop component
  • anchoring elements on the side of the component that is molded into the molded article.
  • One approach to providing such an anchoring element is to glue a strip of anchoring elements, which could be either hooks or loops, to the back side of the hook component. This approach has certain disadvantages.
  • the gluing process is a separate, post-production process that adds to production cost.
  • the adhesive bond is not strong enough to provide firm hook attachment, even when good anchoring into the plastic article is achieved.
  • the hook component can delaminate from the strip of anchoring elements. This is especially true where both the hook component and the strip of anchoring elements are plastic parts, a solvent based adhesive is used, and there is insufficient "breathability" of the parts for adequate drying and cure of the adhesive.
  • Another approach is to laminate loop fabric directly to a molded hook component, which tends to give a good bond and works satisfactorily in many processes.
  • hook-like anchoring elements have proven to be more effective than loop elements.
  • the invention features a back-to-back fastener product having fastening elements on one side of a base member and fastening elements or other anchoring elements on the other side of the base member that are integrally molded with the base member.
  • the spacing both along the length of the fastener and across its width
  • orientation, and geometries of the fastening elements and anchoring elements are set by the molding process and can all be varied.
  • the spacing, orientation, and geometries of the fastening elements are set independently of the spacing, orientation, and geometries of the anchoring elements.
  • the back-to-back fastener product is formed by a continuous forming method in which molten material is extruded into the nip formed between two molding rolls.
  • One of the molding rolls has cavities along its surface that mold the fastening elements; the other has cavities along its periphery that mold the anchoring elements.
  • preferred embodiments have fastening elements facing in alternating directions, which gives good shear strength along either lengthwise direction of the fastener.
  • the fastening elements can be spaced in a checkerboard pattern or even in a random fashion if so desired. Such spacing tends to increase the flexibility of the fastener, because when the fastening elements are arranged in a line across the width of the tape, they tend to function as rib-like structures that increase the stiffness of the fastener.
  • Flexibility of the fastener is also enhanced due to the fact that, in contrast to a product in which a sheet of anchoring elements is glued to the base of a hook component, there is just a single, common base member. This single base member is thinner, and hence more flexible, than the combined base layer of a glued back-to-back product. Furthermore, the glue necessary to assemble a glued product, which increases stiffness of the product, is avoided. Thus, the invention provides increased flexibility of the fastener, which enhances the ability of the fastener to conform to the product into which it is to be molded.
  • the fastening elements are designed to have fastening properties that allow mating loop elements to be repeatedly attached and detached from the fastening elements, as is typical of hook and loop fasteners.
  • the anchoring elements are designed to have sufficient strength to embed the fastener firmly into a molded product. Molding allows these goals to be realized with a high degree of certainty as to how the hook or anchoring elements will perform.
  • both fastening elements and anchoring elements should have continuously tapering cross sections, which allows for easy removal from the molding rolls, the anchoring elements need not be in the shape of simple hooks. They can, for instance, be Y-shaped, double-hooked, or of similar shape which increases their resistance to being pulled from the object into which the fastener is molded.
  • both fastening elements and anchoring elements are hook-shaped, satisfactory anchoring is obtained as 100% of the anchoring elements are embedded, whereas typically only about 30% to 40% of fastening elements engage loop elements.
  • elements designed as hooks are provided on both sides of the base member, in contrast to embodiments wherein elements on one side are designed as anchoring elements.
  • a fastener can be used as an "adaptor" between loop fastener components.
  • a fastener according to the invention having back-to-back hooks can be used to attach the carpeting to the floor of the car.
  • a molded back-to-back fastener has the advantages of being manufactured in a single process, which saves production costs. Furthermore, the problem of the two halves of the fastener delaminating, as occurs with a product in which the two halves are glued to each other, is avoided.
  • a back-to-back fastener is produced using a continuous forming method wherein molten material is extruded into the nip formed between a pair of nip rolls that have cavities around their peripheries.
  • the resins should be extracted from the cavities at temperatures in the range of approximately 150° F to 200° F, which is substantially below their melting points, but above the temperatures at which resins would be extracted from molds in a typical injection molding process.
  • temperatures in the range of approximately 150° F to 200° F, which is substantially below their melting points, but above the temperatures at which resins would be extracted from molds in a typical injection molding process.
  • nylon would be extracted from an injection mold at approximately 150° F, it is pulled from the mold cavities of the nip rolls at approximately 175° F.
  • the anchoring elements are stripped from their forming cavities soon after exiting the nip.
  • the fastening elements are allowed to remain in their forming cavities for approximately half a revolution of the nip roll in which they are molded. This allows for more perfect formation of the fastening elements than the anchoring element, because the fastening elements are given more time to cool.
  • perfectly formed hooks are more desirable than perfectly formed anchoring elements because fewer hooks, percentagewise, are engaged by fastener loops.
  • Additional processing can include in-line application of a protective encasement to the fastening elements. The encasement protects the fastening elements from contamination and deformation when the fastener product is molded into a part, such as by injection molding or compression molding processes.
  • Fig. 1 is a side view of a roll of molded back-to- back fastener with its fastening elements encased and its anchoring elements exposed.
  • Fig. 1A is a close-up view in cross section of the circled region of Fig. 1.
  • Fig. IB is a close-up side view of a molded back- to-back fastener showing a single fastening element and a single anchoring element.
  • Fig. 1C is a side view of a continuous tape of a molded back-to-back fastener.
  • Fig. ID is a side view of a continuous tape of a molded back-to-back fastener having palm-tree-shaped anchoring elements.
  • Fig. IE is a side view of a continuous tape of a molded back-to-back fastener having Y-shaped anchoring elements.
  • Fig. 2 is a side elevational view of apparatus used to manufacture a molded back-to-back fastener.
  • Fig. 3 is a side view showing a molded back-to- back fastener as it is molded by nip rolls.
  • Fig. 4 is a close-up showing a molded back-to-back fastener being formed in the nip between the nip rolls of Fig. 3.
  • Fig. 5 is a perspective view of a back-to-back fastener showing the fastening elements arranged in evenly spaced rows and columns.
  • Fig. 6 is a perspective view of a back-to-back fastener showing the fastening elements arranged in varying directions.
  • Fig. 7 is a perspective view of a back-to-back fastener showing the fastening elements arranged in checkerboard fashion.
  • Fig. 8 is a perspective view of a back-to-back fastener showing rip-stops between fastening elements.
  • Figs. 9-12 are side views, partially in cross, showing a back-to-back fastener being integrally molded with a molded article, and the product produced thereby.
  • Figs. 13 and 14 are side views, partially in cross section, showing upholstery being attached to an automotive seat cushion.
  • a back-to-back moId-in hook component includes molded plastic anchoring elements 3 and molded plastic fastening elements 1 partially encased by protective encasement 5.
  • Anchoring elements 3 anchor the hook component into a molded article, such as a plastic article formed by injection or compression molding. After the molded article is formed, protective encasement 5 is stripped away from fastening elements 1.
  • FIG. 1A an enlarged view of the circled portion of Fig. l, encasement 5 covers most of the fastening elements 1, but the tops are left slightly exposed.
  • FIG. IB yet a further enlargement showing a single fastening element 1 and a single anchoring element 3, both fastening element 1 and anchoring element 3 are formed integrally with base 7 and have cross sectional areas which diminish from base 7 to the top of the hook 9 or to the top of the anchoring element 11.
  • Fastening element 1 has a height, h, ranging from about 0.020 to 0.125 inches, which is typical of molded fastening elements as known in the hook and loop fastener industry.
  • Anchoring element 3 has a height, h', ranging from about 0.025 to 0.125 inches.
  • Base 7 has a thickness, t, which ranges from about 0.008 to 0.030 inches.
  • anchoring element 3 which is not limited to the traditional hook shape as commonly found in hook and loop fasteners, will vary depending on the product into which the hook component is molded. Although shown herein as a simple wave-shaped hook, anchoring element 3 could be formed as a double hook, a palm tree shape as shown in Fig. ID, a Y shape as shown in Fig. IE, or any other geometry suitable for anchoring the hook fastener component into a molded article.
  • FIG. 1C the hook component of Fig. 1 is shown with encasement 5 removed.
  • fastening elements 1 and anchoring elements 3 are identical and have the same pitch (elements per inch) . Such a configuration, however, is not necessary. Because all anchoring elements 3 will be embedded in the molded article, there can be fewer anchoring elements per inch of fastener component than fastening elements 1, only a portion of which actually engage with loop elements of a mating loop fastener component. Furthermore, although shown as facing the same direction, fastening elements 1 and anchoring elements 3 can face in opposing directions, or in various combinations of directions.
  • a preferred method of making a back-to-back hook component, having fastening elements 1 and anchoring elements 3, is similar to the continuous forming method taught in Fischer, U.S. Patent No. 4,794,028, the entire disclosure of which is hereby incorporated herein by reference.
  • apparatus for fabricating a back-to-back fastener includes extruder 10, traditional sheeting dye 12, frame 18 to support a series of rolls, molding roll 14, additional molding roll 15, take-away nip rolls 24, and winder 28 with separate spindles 30 for collecting the finished product.
  • Fig. 3 is a closeup of molding rolls 14 and 15 and chilling roll 17, which are mounted on frame 18 as shown in Fig. 2.
  • a molten web of resin E is extruded from sheeting dye 12 of extruder 10.
  • a small puddle or "reservoir" P is allowed to form just in front of the nip formed between molding rolls 14 and 15, which helps ensure complete filling of the cavities in the molding rolls.
  • the back-to-back molded product F is stripped from the lower molding roll 15, but is allowed to adhere to molding roll 14 approximately half way around its periphery. Molded product F is then stripped from molding roll 14 and passes over the top of smooth chilling roll 17.
  • Rolls 14, 15, and 17 are supported by rotary unions 34, which allow internal cooling of the rolls.
  • Molding rolls 14, 15 are composed of molding rings which are mounted on shell 32, as disclosed in Fischer, U.S. Patent No 4,794,028 (incorporated by reference supra) . Water circulates through internal water passageway 33, located within shell 32, thereby cooling the molding rings and hence, molding rolls 14, 15.
  • Upper molding roll 14 has molding cavities 50, spaced about its periphery, in which fastening elements 1 are formed.
  • lower molding roll 15 has molding cavities 51, spaced about its periphery, in which anchoring elements 3 are formed. Molding rolls 14 and 15 are pressed towards each other with approximately 2,000 to 3,000 pounds of force per linear inch of width. Thus, if molding rolls 14 and 15 are fifteen inches wide, 30,000 to 45,000 pounds of force is applied. Such force is necessary to force the molten material E, which is quite viscous, into molding cavities 50, 51.
  • Back-to-back molded product F can be manufactured from a variety of materials.
  • Plastics that can be used include nylons, polyethylene, polypropylene, vinyls, and polyesters, all of which are extruded by extruder 10 and through sheeting dye 12 in a molten state.
  • the temperature of the molten web E and the surface temperature of the molding rolls 14, 15 are maintained such that the molten resin flows into cavities 50, 51 to form fastening elements 1 and anchoring elements 3.
  • polyolefins should be extruded at a temperature of from 400°F to 450°F, and the surface of molding rolls 14, 15 should be maintained at 150°F to 160°F.
  • Nylon 12 should be extruded at a temperature of from 475°F to
  • anchoring elements 3 are stripped from their molding cavities 51 at a first stripping station at the exit side of the nip formed between molding rolls 14, 15, but fastening elements 1 remain embedded in their molding cavities 50 for approximately half a revolution of molding roll 14.
  • Fastening elements 1 are stripped from their molding cavities 50 at a second stripping station approximately at the top of molding roll 14, due to tension applied to the molded product F by take-away nip rolls 24, by passing the molded product F over chilling roll 17.
  • molding roll 14 is cooled by water circulating through it, the fastening elements 1 are cooled such that they do not deform unacceptably when they are pulled from their molding cavities 50.
  • cooling of the molding roll 14 enhances cooling of the exposed anchoring elements 3 such that, by allowing the anchoring elements to cool for a sufficient period of time, they are not permanently and detrimentally crushed as the molded product F passes over chilling roll 17. Cooling of molded product F continues as it passes over chilling roll 17, and further cooling occurs as it continues downline towards spindles 30.
  • two sets of take- away nip rolls 24 can be used in series. Two sets, however, are not necessary, and various other apparatus can be provided for secondary product processing. For example, additional cooling means can be added to the production line. Alternatively, processing means can be set up between frame 18 and nip rolls 24 to apply a protective encasement 5 (Figs. 1, 1A) to the fastening elements 1.
  • a second extruder can be positioned downline from chilling roll 17 which extrudes flexible PVC (polyvinyl chloride) , or some other encasement material, onto the molded product F, and heating elements could be provided to activate a blowing agent added to the flexible PVC to cause the flexible PVC to foam.
  • Encasement 5 is then nipped onto the fastening elements 1.
  • encasement 5 can be calender coated or cast onto fastening elements 1 with appropriate tooling at similar locations.
  • the manufacture and application of encasement 5 to fastening elements 1 is described in greater detail in the U.S. patent application entitled “Die Cut Mold-In", filed July 6, 1993 by Donald L. Banfield et al. (incorporated by reference supra) .
  • the back-to-back hook fastener thus produced can be anchored firmly into a molded article, leaving the fastening elements exposed (once the protective encasement is removed) for attachment to the loop component of a hook and loop fastener. Because the anchoring elements and fastening elements are integrally molded, dela ination of the anchoring elements from the fastening elements is avoided. Furthermore, because the back-to-back hook fastener is molded in a single process step, manufacturing costs are reduced. Finally, individually molding the fastening elements and anchoring elements, in a method similar to the continuous forming method as disclosed in Fischer, U.S. Patent No 4,794,028 (incorporated by reference supra) , permits a high degree of versatility in terms of fastener design.
  • the fastening elements 1 can be arranged in evenly spaced rows and columns, as shown in Fig. 5; they can be oriented in varying directions, as shown in Fig. 6; and they can be spaced in checkerboard fashion, as shown in Fig. 7. Furthermore, reinforcing rip-stops 13 can be molded integrally with fastening elements 1 and base member 7, as shown in Fig. 8.
  • a back-to-back hook fastener preferably with the fastening elements 1 partially encased in a protective elastomeric encasement 5, as shown in Fig. 1A — is secured in trough 102 of mold 100 with the anchoring elements 3 exposed to the cavity 104 of the mold.
  • Mold 100 is used to make, for example, foam automobile seat cushions or other injection molded items.
  • Chemicals 110 are introduced into the mold cavity (Fig. 10) and combine to form the foam material of the seat cushion, flowing around and encapsulating the fastening elements such that they become embedded in the molded article 112 (Fig. 11) .
  • the molded article 112 is removed from the mold 100 and the protective elastomeric encasement 5 is removed from the fastening elements 1, thereby exposing them above the surface of the molded article.
  • fabric upholstery 114 is attached to the molded article — an automobile seat cushion in this case — by engaging the fabric of the upholstery with the fastening elements 1 (Fig. 13) .
  • the upholstery can be attached to the molded article by engagement of a loop fastener component 116, attached to the upholstery, with the fastening elements 1.
  • back-to-back fastener component can be integrally molded with articles made by other molding processes as well, such as compression molding and liquid plastic molding.
  • anchoring elements 3 are shown in Figs. 9 and 10 as hook-shaped, other geometries for the anchoring elements are possible, as described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)

Abstract

Une fixation à crochets dos à dos comprend des éléments de fixation en forme de crochet (1) s'étendant depuis un côté d'un élément de base (7), et des éléments d'ancrage (3) s'étendant depuis le côté opposé de l'élément de base (7). Les éléments de fixation (1) et les éléments d'ancrage (3) sont individuellement moulés intégralement avec l'élément de base (7). La fixation dos à dos est utile pour mouler intégralement les éléments de fixation (1) dans un article moulé pour pouvoir ensuite attacher une autre pièce comportant une boucle correspondante. Dans une variante, la fixation dos à dos est utile, lorsque les éléments d'ancrage (3) sont conçus en forme de crochet, pour attacher ensemble les composants en boucle des fixations en crochets et en boucles. La fixation à crochets dos à dos est réalisée par extrusion d'une bande de résine thermoplastique fondue dans l'écartement formé entre deux rouleaux de moulage (14, 15), ces rouleaux ayant des cavités autour de leur périphérie, dans lesquelles les éléments de fixation (11) et les éléments d'ancrage (3) sont moulés.
PCT/US1994/007556 1993-07-06 1994-07-06 Fixation a crochets dos a dos WO1995001863A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU73230/94A AU7323094A (en) 1993-07-06 1994-07-06 Back-to-back hook fastener

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US8791793A 1993-07-06 1993-07-06
US08/087,917 1993-07-06
US9231293A 1993-07-14 1993-07-14
US08/092,312 1993-07-14

Publications (1)

Publication Number Publication Date
WO1995001863A1 true WO1995001863A1 (fr) 1995-01-19

Family

ID=26777517

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/007556 WO1995001863A1 (fr) 1993-07-06 1994-07-06 Fixation a crochets dos a dos

Country Status (2)

Country Link
AU (1) AU7323094A (fr)
WO (1) WO1995001863A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998002331A1 (fr) * 1996-07-17 1998-01-22 Minnesota Mining And Manufacturing Company Element de fixation utilise comme insert, et procede permettant de relier un tel element de fixation avec un objet moule
US5755016A (en) * 1996-12-23 1998-05-26 Velcro Industries, B.V. Hook and loop fastening and the like
US5884374A (en) * 1997-11-20 1999-03-23 Velcro Industries B.V. Fastener members and apparatus for their fabrication
US5971738A (en) * 1997-01-21 1999-10-26 Velcro Industries B.V. Continuous molding of fasteners and other features
WO2000025620A1 (fr) * 1998-11-02 2000-05-11 Gottlieb Binder Gmbh & Co. Procede pour produire un element de fermeture auto-agrippante
EP1019229A1 (fr) * 1997-01-21 2000-07-19 Velcro Industries B.V. Moulage d'elements de fixation et d'autres articles
US6106922A (en) * 1997-10-03 2000-08-22 3M Innovative Company Coextruded mechanical fastener constructions
FR2821529A1 (fr) * 2001-03-01 2002-09-06 Tape Ind Systeme d'attache a crochets
US6543099B1 (en) 2000-06-02 2003-04-08 Velcro Industries B.V. Varying the loop engageability of fastener element arrays
US6930277B2 (en) 1997-09-10 2005-08-16 Velcro Industries B.V. Fastener element molding
EP2623369A1 (fr) * 2012-02-01 2013-08-07 Taiwan Paiho Limited Sangle de fixation, article en mousse comprenant celle-ci et procédé de fabrication de la courroie de fixation
CN103238993A (zh) * 2012-02-01 2013-08-14 台湾百和工业股份有限公司 发泡对象及其制造方法、用于发泡对象的可弯折式扣钩件
WO2015039828A1 (fr) * 2013-09-18 2015-03-26 Bayerische Motoren Werke Aktiengesellschaft Ensemble structural et procédé pour produire un élément en matière plastique et élément en matière plastique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4323533A (en) * 1979-08-17 1982-04-06 Monsanto Company Rotary forming of articles
US4617214A (en) * 1983-10-07 1986-10-14 Aplix S.A. Strip or similar element for being attached to and covered by a molded article and method
US4794028A (en) * 1984-04-16 1988-12-27 Velcro Industries B.V. Method for continuously producing a multi-hook fastner member and product of the method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4323533A (en) * 1979-08-17 1982-04-06 Monsanto Company Rotary forming of articles
US4617214A (en) * 1983-10-07 1986-10-14 Aplix S.A. Strip or similar element for being attached to and covered by a molded article and method
US4794028A (en) * 1984-04-16 1988-12-27 Velcro Industries B.V. Method for continuously producing a multi-hook fastner member and product of the method

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998002331A1 (fr) * 1996-07-17 1998-01-22 Minnesota Mining And Manufacturing Company Element de fixation utilise comme insert, et procede permettant de relier un tel element de fixation avec un objet moule
US5755016A (en) * 1996-12-23 1998-05-26 Velcro Industries, B.V. Hook and loop fastening and the like
US6533981B1 (en) 1997-01-21 2003-03-18 Velcro Industries B. V. Molding of fasteners and other features
USRE40858E1 (en) * 1997-01-21 2009-07-21 Velcro Industries B.V. Fastener element molding
US5971738A (en) * 1997-01-21 1999-10-26 Velcro Industries B.V. Continuous molding of fasteners and other features
EP1019229A1 (fr) * 1997-01-21 2000-07-19 Velcro Industries B.V. Moulage d'elements de fixation et d'autres articles
EP1019229A4 (fr) * 1997-01-21 2001-07-04 Velcro Ind Moulage d'elements de fixation et d'autres articles
US6930277B2 (en) 1997-09-10 2005-08-16 Velcro Industries B.V. Fastener element molding
US6106922A (en) * 1997-10-03 2000-08-22 3M Innovative Company Coextruded mechanical fastener constructions
US6524507B1 (en) 1997-11-20 2003-02-25 Velcro Industries B.V. Process and apparatus for forming fastener elements
US5884374A (en) * 1997-11-20 1999-03-23 Velcro Industries B.V. Fastener members and apparatus for their fabrication
WO2000025620A1 (fr) * 1998-11-02 2000-05-11 Gottlieb Binder Gmbh & Co. Procede pour produire un element de fermeture auto-agrippante
US6669884B1 (en) 1998-11-02 2003-12-30 Gottlieb Binder Gmbh & Co. Method for producing an adhesive closing element
US6671935B2 (en) 2000-06-02 2004-01-06 Velcro Industries B.V. Varying the loop engageability of fastener element arrays
US6543099B1 (en) 2000-06-02 2003-04-08 Velcro Industries B.V. Varying the loop engageability of fastener element arrays
FR2821529A1 (fr) * 2001-03-01 2002-09-06 Tape Ind Systeme d'attache a crochets
EP2623369A1 (fr) * 2012-02-01 2013-08-07 Taiwan Paiho Limited Sangle de fixation, article en mousse comprenant celle-ci et procédé de fabrication de la courroie de fixation
CN103238993A (zh) * 2012-02-01 2013-08-14 台湾百和工业股份有限公司 发泡对象及其制造方法、用于发泡对象的可弯折式扣钩件
AU2013200490B2 (en) * 2012-02-01 2014-04-17 Taiwan Paiho Limited Fastening strap, foam article including same and method for manufacturing the fastening strap
US8916256B2 (en) 2012-02-01 2014-12-23 Taiwan Paiho Limited Fastening strap, foam article including same and method for manufacturing the fastening strap
CN103238993B (zh) * 2012-02-01 2015-07-29 台湾百和工业股份有限公司 发泡对象及其制造方法、用于发泡对象的可弯折式扣钩件
WO2015039828A1 (fr) * 2013-09-18 2015-03-26 Bayerische Motoren Werke Aktiengesellschaft Ensemble structural et procédé pour produire un élément en matière plastique et élément en matière plastique

Also Published As

Publication number Publication date
AU7323094A (en) 1995-02-06

Similar Documents

Publication Publication Date Title
EP0580073B1 (fr) Procédé et dispositif pour fabriquer un élément de fermeture pourvu d'une couche de support pour une fermeture du type à éléments d'accrochage
US6899841B2 (en) Stretched fasteners
US6248419B1 (en) Laminated hook fastener
US7223314B2 (en) Stretchable fastener
US7431976B2 (en) Fastening member for a molded article
EP1021105B1 (fr) Element de prehension pour systeme de fermeture et son procede de fabrication
US5904793A (en) Method and equipment for rapid manufacture of loop material
CA2177109C (fr) Fixation moulee; methode de sa fabrication
US7488527B2 (en) Molded touch fasteners
US6878332B2 (en) Methods of making sheets with arrays of projections
WO1995001863A1 (fr) Fixation a crochets dos a dos
EP1656848A2 (fr) Articles de fixation et leur méthode de fabrication
EP0745337A1 (fr) Fermeture du type à éléments d'accrochage réalisée par moulage et son procédé de fabrication
US5981027A (en) Fastening member with loops and process and machine for producing it
WO1998032349A1 (fr) Fixations allongees
JPS6339316A (ja) 布材にて被覆された挾付け型縁当て及びその製造法
JP2566609B2 (ja) 面フアスナー部材の製造方法
MXPA99006874A (en) Stretched fasteners

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AM AT AU BB BG BR BY CA CH CN CZ DE DK ES FI GB GE HU JP KE KG KP KR KZ LK LT LU LV MD MG MN MW NL NO NZ PL PT RO RU SD SE SI SK TJ TT UA US US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE MW SD AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA