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
  • B29C44/1261—Avoiding impregnation of a preformed part
• • 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
  • 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 coating materials, which are provided with adhesive fastener parts with corresponding adhesive elements, to the relevant upholstery foam part.
• the adhesive closure part on the front side, on which the adhesive elements are exposed with a cover element covering the entire surface of the adhesive elements in the form of a layer made of a sealing mass is covered, which is removable after the foaming process to expose the adhesive elements.
• 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 adhesive elements are preferably received in a recess machined into the shaping wall of the foaming mold, beyond the edge region of which the cover with a predetermined edge width protrudes in a foam-sealing manner and is brought into contact with the edge regions of the recess by means of the holding device.
• An adhesive connection can be used as the holding device which brings about the detachable contact of the protruding edge regions of the cover with the corresponding parts of the foam mold, which enables subsequent detachment from the foam mold.
• the cover is provided with ferromagnetic components, so that the cover itself can be used as part of the holding device, which, in cooperation with magnetic field-generating holding elements on the foaming mold, ensures the detachable system.
• the procedure can be such that the cover is provided with a ferromagnetic coating, for example with a coating made of polyurethane, as sold under the name SU-9182 by the company Stahl, the admixed Fe particles with a grain size of ⁇ 10 ⁇ m contains as ferromagnetic material.
• a ferromagnetic coating for example with a coating made of polyurethane, as sold under the name SU-9182 by the company Stahl
• the admixed Fe particles with a grain size of ⁇ 10 ⁇ m contains as ferromagnetic material.
• Permanent magnets for example in the form of a series of bar magnets or magnetic strips, which are located in the wall of the foam mold, can be used as the part of the holding device belonging to the foam mold formed recess, in which the adhesive elements of the foam fastener part are received.
• the invention also relates to an adhesive fastener part which can be foamed into a foam body part and which has the features of claim 11.
• Figure 1 is a schematically simplified and cut end perspective view of an upholstery foam part with foamed adhesive fastener part.
• FIG. 2 shows a view similar to FIG. 1 of an upholstered foam part with a molded-in fastener part recessed therein;
• FIG. 3 shows a partial section, drawn on an enlarged scale, of an adhesive closure part inserted into a foaming mold
• FIG. 3A shows a greatly enlarged section of the area designated by A in FIG. 3;
• FIG. 4 shows a perspective section of a foaming mold with an inserted fastener part
• Fig. 5 is a schematically simplified perspective
• FIGS. 6 and 7 are perspective views of the molded part from FIG. 5 with the adhesive closure part partially or completely applied to it.
• Fig. 1 shows a part of an upholstery foam part 1, which has on its surface a flush-molded foam fastener part 3.
• the adhesive closure part 3 On its front or interlocking side, the adhesive closure part 3 has adhesive elements 5, which can be designed in a known manner, for example as loops, as can be seen in FIGS. 3 and 3A.
• the adhesive elements 5 can also be mushroom-shaped or hook-shaped and are used for attachment with corresponding, corresponding adhesive elements of a body to be attached to the upholstery foam part 1, for example a cover.
• the adhesive closure part 3 is foamed into a recess 7 in the upholstery foam part 1, so that the adhesive elements 5 are not arranged flush with the surface.
• FIG. 3 and 4 illustrate the foaming-in of the adhesive closure part 3 in an arrangement which is flush with the surface of the upholstery foam part 1.
• a foaming mold is used, the shaping wall 9 of which has a recess 11 in the area of the adhesive closure part 3, which is adapted to the surface area of the adhesive elements 5 of the adhesive closure part 3, so that when the same is applied to the wall 9 of the foaming mold, the adhesive elements 5 in the recess 1 1 are included.
• the adhesive elements 5 are connected to a cover 15 laminated onto the adhesive layer 13 by means of an adhesive layer 13 that forms a permanent bond. This consists of a material that is well bonded to the foam material, for example a fleece or felt.
• the cover 1 5 extends with its outer edge areas over the surface area of the adhesive elements 5 and the foam in the wall 9 of the E trained recess 1 1, wherein the protruding edge width of the cover 1 5 is selected so that the edge regions overlap permanent magnets, which are shown in Fig. 3 and 3A as magnetic strips 1 7.
• the cover 15 is provided with a ferromagnetic coating, for example with a polyurethane coating with added Fe particles, as a result of which the cover 15 is given ferromagnetic properties so that the edge regions releasably adhere to the magnetic strips 17.
• This arrangement of the edge regions of the cover 15, around the region of the adhesive elements 5 accommodated in the recess 11 of the wall 9, forms a foam seal which prevents the foam material from accessing the adhesive elements 5 during the foaming process.
• the firm connection of the adhesive elements 5 to the cover 15 can take place directly via the polyurethane coating containing the ferromagnetics, which can be, for example, the polyurethane SU-9182 from Stahl.
• an additional adhesive layer 1 3 can be provided for the ferromagnetic coating, for example made of a moisture-crosslinking polyurethane (e.g. Tivomelt 961 7-1 1 from Tivoli).
• a further possibility is the formation of the cover 15 by an adhesive base layer which directly supports the adhesive elements 5, for example an adhesive base layer which contains synthetic resin or polyurethane together with ferromagnetics.
• FIG. 4 illustrates the use of a group of bar magnets 21 instead of the magnetic strips 1 7 shown in FIGS. 3 and 3A.
• the bar magnets 21 are arranged around the recess 11 in the wall 9 of the foaming mold in such a way that that the edges of the ferromagnetic cover 1 5 on the wall 9 are held in close contact.
• 5 to 7 illustrate the process of the so-called pipe foaming, the adhesive closure part 3 being foamed in the recess 7 of the upholstery foam part 1 concerned.
• a molded part 23 which can be anchored to the wall 9 of the foaming mold is used, in the surface of which the recess 11 is incorporated, in which the adhesive elements 5 of the relevant adhesive fastener part 3 can be received in a protected manner.
• Magnetic strips 1 7 are located on the narrow sides of the recess 11 for the contact of the narrow edge regions of the ferromagnetic cover 1 5. Their slow edge regions, as shown in FIGS. 6 and 7, are folded over rounded edges 25 of the molded part 23 in order to be provided with lateral magnetic strips 1 7 come in foam-sealing system.

Landscapes

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

Priority Applications (8)

Applications Claiming Priority (1)

Publications (1)

Family

ID=8167027

Family Applications (1)

Country Status (7)

Cited By (10)

Families Citing this family (3)

Citations (2)

Family Cites Families (1)

• 1998
  • 1998-08-03 US US09/743,710 patent/US7842368B1/en not_active Expired - Fee Related
  • 1998-08-03 AT AT98939652T patent/ATE248696T1/de active
  • 1998-08-03 EP EP98939652A patent/EP1102668B1/de not_active Expired - Lifetime
  • 1998-08-03 WO PCT/EP1998/004832 patent/WO2000007792A1/de not_active Ceased
  • 1998-08-03 ES ES98939652T patent/ES2206976T3/es not_active Expired - Lifetime
  • 1998-08-03 DE DE59809518T patent/DE59809518D1/de not_active Expired - Lifetime
  • 1998-08-03 JP JP2000563451A patent/JP4414593B2/ja not_active Expired - Lifetime

Patent Citations (2)

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