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
  • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
  • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
  • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
  • B29C44/1271—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed parts being partially covered
• • 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
• • 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
  • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
  • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
  • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
  • B29C44/1261—Avoiding impregnation of a 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
• • 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
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24008—Structurally defined web or sheet [e.g., overall dimension, etc.] including fastener for attaching to external surface
• • 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
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24008—Structurally defined web or sheet [e.g., overall dimension, etc.] including fastener for attaching to external surface
  • Y10T428/24017—Hook or barb

Definitions

• the invention relates to a method for producing a foam body part, in particular an upholstered foam part for a vehicle seat, which is provided with at least one adhesive closure part with adhesive elements which are covered by a foam-holding cover and are accommodated in a foam-in-mold producing the foam body part.
• Foam body parts with foamed-in adhesive fastener parts are preferably used as upholstery foam parts for seat elements, backrests or headrests, in particular for vehicle seats.
• the adhesive elements of the foamed-in adhesive fastener parts generally serve to fasten cover materials which are provided with adhesive fastener parts with corresponding adhesive elements to the respective upholstery foam part.
• BESL ⁇ FIEUNGSKOPIE In order to ensure the functionality of the adhesive fastener parts, it is essential during the foaming process that the adhesive elements are securely protected against penetration of the foam material by means of the foam-holding cover, so that sticking of the adhesive elements is avoided.
• thermoplastic material is used as the sealing compound, which can be melted and reused after it has been removed.
• the invention is therefore based on the object of demonstrating a method which enables the production of foam body parts with foamed-in adhesive fastener parts in a comparatively simpler and more economical manner.
• the interlocking side having the adhesive elements is free of any sealing material
• the foam covering is rather ensured by the adhesive closure part itself, which is held with its protruding edge regions in sealing contact with relevant parts of the foaming mold, the desired simplification of the process sequence results , since sealing material is neither applied to the adhesive elements, nor must it subsequently be removed, so that the further measures for the possible reuse of sealing material are also eliminated.
• the adhesive elements are preferably arranged in one plane with the edge cover of the adhesive fastener part in contact with the foaming mold, or in another type of embodiment, the adhesive elements are preferably arranged in another plane as the edge cover of the adhesive fastener part and in a recess of the foam mold in contact with the latter.
• At least the edge cover of the touch-and-close fastener part has ferromagnetic components and is used as one part of the holding device, the other part of which is associated with the foaming mold, is formed by holding elements generated on the magnetic field and on which elements form a foam barrier the edge cover is held during the foaming process.
• the procedure can be such that the ferromagnetic components are an integrated part of the adhesive closure part or are applied as layers on its front and / or rear side.
• the respective coating can be obtained using a sol-gel process or formed from an adhesive primer.
• Permanent magnets can be used as the part of the holding device belonging to the foaming mold, for example in the form of a series of bar magnets or magnetic strips which surround the recess or contact surface for the adhesive elements formed in the wall of the foaming mold.
• the invention also relates to an adhesive closure part which can be foamed into a foam body part and which has the features of claim 10.
• 1 to 5 each show a schematically simplified and cut end view of the foaming mold with adhesive part to be foamed.
• the respective fastener part 1 according to FIGS. 1 to 5 is used in particular for foaming upholstery parts of vehicle seats (not shown) during their manufacture.
• the band-like adhesive fastener part 1 which, however, can also form other surface geometries, has adhesive elements 2 on one side for connection to corresponding adhesive elements of another adhesive fastener part (not shown) to form a conventional adhesive fastener. In this way, upholstery and upholstery materials can then be releasably attached to the foamed vehicle seat via the respective adhesive fastener.
• the adhesive fastener part 1 shown in FIGS. 1 to 3 is produced using a conventional method, as is shown, for example, by DE 196 46 318.1.
• the adhesive elements 2 according to Figures 1 to 3 are made of mushroom-like stems formed, which are widened in a plate shape at their free end.
• the adhesive elements 2 can also consist of loops which are to be produced in a conventional manner and which serve to engage hook-shaped adhesive elements (not shown) of the corresponding adhesive fastener part for producing an adhesive fastener.
• the respective fastener part 1 with its adhesive elements 2 is covered by a foam-holding cover 3 in a foam mold 4 (not shown) producing the foam body part, which in the figures is only half as part of one Shaped box is shown.
• the cover 3 is formed by the adhesive closure part 1 itself, which is arranged with an edge cover 5 which can be predetermined in width, with a sealing surface projecting beyond the surface area with the adhesive elements 2, and with a holding device which is designated as a whole by 6 in detachable system with the foam 4 is brought.
• the adhesive elements 2 can be arranged in one plane with the edge cover 5 of the adhesive fastener part 1 in contact with the foaming mold 4, so that the surface area with the adhesive elements 2 is in the direction of view of FIG. 1 and 4 bulges upward as seen above.
• the adhesive elements 2 are arranged in a different plane from the edge cover 5 of the adhesive closure part 1 and in a recess 7 of the foam mold 4 in contact with the latter.
• the levels referred to relate to the front-side contact surfaces of adhesive fastener parts 1 with their adhesive elements 2.
• the edge cover 5 is formed at least from two longitudinal edges of the adhesive closure part 1, which are provided with the surface area with the adhesive elements 2 between them free of the adhesive elements 2. However, the edge cover 5 preferably completely encompasses the surface area with the adhesive elements 2 on all sides in the manner of a rectangular shape.
• the mentioned ferromagnetic components can be formed as an integrated part of the adhesive closure part or can be applied as layers on its front and / or back.
• the respective coating is preferably obtained using a sol-gel process or formed from an adhesive primer.
• sol-gel process which is used in the production of adhesive fastener parts 1, is described in PCT / EP 98/03055.
• the layer 9 obtained via the sol-gel process is nanocomposite, the sol-gel being selected on the basis of Si0 2 and / or Ti0 2 modified Si0 2 . So that the relevant layer 9 has ferromagnetic properties, the sol gel is mixed with ferrite or a ferrite-containing material of the structure Fe v Oy. Magnetite can also be precipitated in order to obtain a ferromagnetic sol gel.
• the layer 9 can be applied to the adhesive fastener part 1 by padding, dipping, spraying, pouring, vapor deposition, laminating or knife coating and laminating.
• the respective layer 9 can also consist of an adhesive primer made of resorcinol and / or at least one of its derivatives.
• an adhesive primer is a polyurethane layer containing ferromagnetics, which may be, for example, the polyurethane SU 9182 from Stahl.
• a relevant primer is described in PCT / EP 98/02886.
• the holding elements 8 of the foaming mold 4 which generate magnetic fields are formed from permanent magnets, for example in the form of magnetic strips 10 or bar magnets (not shown) inserted in the foaming mold 4 or in their molded parts (pipes).
• the respective fastener parts 1 with their ferromagnetic properties or with their respective layers are held in firm contact and position within the foaming mold 4 during the foaming process, the respective cover 3 being formed in the region, forming a sealing surface or foam barrier the respective edge cover 5 avoids the harmful penetration of the foam material into the adhesive elements 2 with certainty. Any additional covers on the back of the adhesive closure part 1 or in the form of a sealing compound directly for the adhesive elements 2 are thus avoided. As shown in FIGS.
• the edge covers 5 can end in the area of the magnetic strips 10 or, as shown in FIGS. 2, 3 and 5, extend beyond them in their edge dimensions and form an extended sealing section.
• the layers 9 mentioned can, in particular if they are arranged on the back of the respective fastener part 1 facing away from the foaming mold 4, improve the foaming process in such a way that safe foaming of the fastener part 1 in the polyurethane foam material of the motor vehicle upholstery part occurs.
• the adhesive fastener part 1 consists in particular of a polyamide or a polyolefin material.
• the known manufacturing process according to DE 196 46 318 A1 is used to manufacture the adhesive fastener part 1 with his A large number of integrally formed adhesive elements 2 in the form of stems having thickenings are fed a thermoplastic in a plastic or liquid state into a gap between a pressure roller and a shaping roller, the shaping roller being provided with cavities which are open to the inside and outside and both rollers are driven in opposite directions of rotation .
• the molding roll has a screen, the cavities of which have been produced by etching or by means of a laser, the adhesive closure elements being produced solely by the fact that the thermoplastic material hardens in the open cavities of the screen of the molding roll.
• the thickenings of the individual stems mentioned are formed in the form of flattened or concave recesses with mushroom heads.
• the loops can be produced as adhesive elements 2 as shown in FIGS. 4 and 5.
• very small individual adhesive elements 2 can be produced, the size of which may well be in the nanometer range.
• the adhesive closure part 1 can also be formed from textile or other plastic materials, for example using conventional knitting and knitting techniques. If these are provided with ferromagnetic coatings, a sealing foam barrier can also be achieved. After the foaming process has been carried out, the foamed part, in particular the upholstered part, can be easily removed from the foaming mold 4 with the adhesive closure part 1 foamed therein, overcoming the holding forces of the holding elements 8 arranged in the foaming mold.
• the foaming mold 4 is then available for a new foaming process Available.
• the adhesive elements 2 of the adhesive closure part 1 foamed in this way are then exposed to the surroundings in any case and have no foam material that could impair their functionality.
• no additives or additional seals, such as attached sealing lips or the like, are necessary, but the sealing is carried out solely by the plane-parallel contact of surfaces of the adhesive fastener tape with corresponding contact surfaces of the foaming mold.
• the edge cover 5 of the adhesive closure part 1, which produces the seal can be designed in the manner of a film or at least very thin-walled.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)
• Casting Or Compression Moulding Of Plastics Or The Like (AREA)
• Mattresses And Other Support Structures For Chairs And Beds (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)
• Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
• Adhesives Or Adhesive Processes (AREA)

Priority Applications (9)

Applications Claiming Priority (1)

Publications (1)

Family

ID=8167076

Family Applications (1)

Country Status (9)

Cited By (10)

Families Citing this family (7)

Citations (2)

Family Cites Families (6)

• 1998
  • 1998-09-28 ES ES98958223T patent/ES2192343T3/es not_active Expired - Lifetime
  • 1998-09-28 JP JP2000572063A patent/JP4439118B2/ja not_active Expired - Lifetime
  • 1998-09-28 US US09/787,110 patent/US7063878B1/en not_active Expired - Lifetime
  • 1998-09-28 DE DE59807145T patent/DE59807145D1/de not_active Expired - Lifetime
  • 1998-09-28 CA CA002345152A patent/CA2345152C/en not_active Expired - Fee Related
  • 1998-09-28 WO PCT/EP1998/006141 patent/WO2000018556A1/de not_active Ceased
  • 1998-09-28 BR BR9816036-2A patent/BR9816036A/pt not_active IP Right Cessation
  • 1998-09-28 EP EP98958223A patent/EP1117519B1/de not_active Expired - Lifetime
  • 1998-09-28 AT AT98958223T patent/ATE232156T1/de not_active IP Right Cessation

Patent Citations (2)

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