EP0959731A1 - Piece moulee en mousse avec element d'ancrage integre dans la mousse - Google Patents

Piece moulee en mousse avec element d'ancrage integre dans la mousse

Info

Publication number
EP0959731A1
EP0959731A1 EP96938969A EP96938969A EP0959731A1 EP 0959731 A1 EP0959731 A1 EP 0959731A1 EP 96938969 A EP96938969 A EP 96938969A EP 96938969 A EP96938969 A EP 96938969A EP 0959731 A1 EP0959731 A1 EP 0959731A1
Authority
EP
European Patent Office
Prior art keywords
anchoring element
foam
molded part
thread
molding according
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.)
Granted
Application number
EP96938969A
Other languages
German (de)
English (en)
Other versions
EP0959731B1 (fr
Inventor
Hubert Mense
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.)
FS Fehrer GmbH and Co KG
Original Assignee
FS Fehrer GmbH and Co KG
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 FS Fehrer GmbH and Co KG filed Critical FS Fehrer GmbH and Co KG
Publication of EP0959731A1 publication Critical patent/EP0959731A1/fr
Application granted granted Critical
Publication of EP0959731B1 publication Critical patent/EP0959731B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/18—Seat parts having foamed material included in cushioning part
    • A47C7/20—Seat parts having foamed material included in cushioning part with reinforcement in the foam layer
    • 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
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249986—Void-containing component contains also a solid fiber or solid particle

Definitions

  • the invention relates to a foam molded part with a foamed-in anchoring element, by means of which the molded part can be connected to further components, in particular a cover.
  • the mechanical strength of foams is comparatively low, especially in relation to tensile forces. If foam molded parts are to be connected to other components with tensile loads, it is therefore customary in the prior art either to carry out a large-area gluing or to use anchoring elements in order to ensure a wide distribution of the forces and punctual loads which lead to the tearing of the foam would be avoided.
  • upholstery elements often consist of a central molded foam part, the surface of which is provided with a cover, usually a fabric or leather.
  • a cover usually a fabric or leather.
  • one or more wires are foamed into it, to which the cover is connected by fastening elements, for example threads or hooks.
  • a tight connection creates in the area of the connection parts of the recesses on the surface of the upholstery, which improve the fixation of the cover and contribute to the visual and functional design of the surface.
  • fastening points on the wire are freely accessible through recesses in the molded part, so that the connection is made easier.
  • the foams used are predominantly polyurethanes which are produced by polyaddition of polyalcohols with polyisocyanates. The isocyanate reacts with the hydroxyl group which characterizes the alcohol.
  • the object of the invention is to develop a foam molded part with an anchoring element in which the mechanical strength of the connection is increased, the weight of the cushion element is reduced and common recycling processes are not impaired.
  • the anchoring element is a thread (2) made of organic material which runs parallel to the surface of the cushion.
  • the starting point of the invention is to use a thread as an anchoring element which runs parallel to the surface of the cushion in its interior.
  • the function of the thread which is preferably freely accessible in individual areas through recesses in the molded foam part, corresponds to that of the wires customary in the prior art.
  • a thread is characterized by a high degree of flexibility, so that it adapts well to deformation of the cushion and the risk of tearing is reduced.
  • the molded part is characterized by a reduced weight, since the density of organic media is generally significantly lower than that of metals. Furthermore, neither shredding nor chemical dissolution of the foam is prevented during recycling.
  • the anchoring elements according to the invention can be used in all customary reaction processes for the production of foams, in particular polyadditions and condensations.
  • the mechanical adhesion between the anchoring element and the foam is reinforced by chemical bonds.
  • the central idea here is to use an anchoring element which has functional chemical groups on its surface which are also present on an educt of the foam and are involved in the reaction to its formation. Are polyacoles about their hydroxyl groups involved in the reaction process, it is therefore advisable to use anchoring elements whose surface is terminated by hydroxyl groups.
  • a large number of substances on a mineral or vegetable basis are suitable as materials of the anchoring element, since in particular carbohydrates, such as cellulose, are provided with readily accessible hydroxyl groups.
  • the adhesion between foam and anchoring element can be further improved if its surface is structured in relief, for example corrugated or serrated. In this case, in addition to the chemical bond, there is also a positive connection.
  • Preferred materials for the anchoring element are natural fibers, which both have thermal hydroxyl groups on the surface and are structured on a microscopic length scale. Suitable materials are, for example, (long) hemp or jute, which have a high tensile strength. In addition to being introduced into the foam part as individual threads, use in the form of nets is also conceivable, so that fastening options are distributed over an area.
  • polyurethane is provided as the foam, which is formed by polyaddition of di- or polyacolyols with di- or polyisocyanates.
  • Tools for producing a foam molded part with an anchoring element have a receiving device, into which it is inserted before the foaming process and in which the element is fixed during the course of the reaction.
  • the thread is first clamped in the receiving device.
  • a tensile load is required so that the position of the flexible thread is clearly defined in the tool and is also retained during the foaming process.
  • the maximum possible tensile strength in the foamed state increases due to the pretension. This is followed in a known manner by the foaming of the tool and the removal of the molded part.
  • the thread is expediently pulled off a roll and cut only immediately before being inserted into the tool, after being clamped into the holding device or after the foaming process has been completed. In this way, stockpiling is made considerably easier, since there are no anchoring elements with different dimensions to be stored. Further details, features and advantages of the invention can be found in the following description, in which an exemplary embodiment of the invention is explained in more detail with reference to the drawing.
  • the drawing shows a principle representation
  • FIG. 1 cut cushion element, with foam molding according to the invention
  • threads (2) are foamed in parallel to its surface and consist, for example, of long hemp or jute.
  • the thread (2) is accessible through recesses (3) in the molded part (1), which can be produced by round or angular elevations of the molding tool, on which the thread (2) can be fixed during the foaming process.
  • the outer cover (4) of the cushion element is anchored to the thread (2) by fastening elements (5), for example hooks or threads, which run through the recesses (3), with grooves (6) on the surface due to the tensile load surface of the upholstery element, each running parallel to threads (2).
  • a fleece (7) arranged between cover (4) and molded part (1) improves the air circulation through the cushion and makes its surface appear softer. If the molded part (1) is produced using polyacollars as educts of the foam, a thread (2) provided on its surface with hydroxyl groups forms chemical bonds with the foam. Furthermore, there is an intensive positive connection between the thread (2) and the surrounding foam. In this way, a very firm and highly resilient connection between the anchoring element and the molded part (1) is ensured with a low weight and good recyclability of the material.
  • FIG. 2 shows a cross section through an alternative molded part (1), in which the thread (2) runs through the foam in the form of a polygon.
  • a cover (4) or other object can be attached to a single, continuous thread (2) from different sides of the molded part (1) without fixing elements (5) having a large material thickness of the molded part ( 1) have to take action.
  • outside areas (8) of the molded part (1) can have different material properties, and can be produced or placed integrally with the molded part (1).

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

L'invention propose une pièce en mousse comportant un élément d'ancrage intégré dans la mousse, qui permet d'assembler la pièce moulée à d'autres éléments de construction, notamment à un revêtement. Ledit élément d'ancrage est un fil (2) en matière organique qui s'étend parallèlement à la surface du rembourrage.
EP96938969A 1995-11-02 1996-10-30 Piece moulee en mousse avec element d'ancrage integre dans la mousse Expired - Lifetime EP0959731B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19540714 1995-11-02
DE19540714 1995-11-02
PCT/DE1996/002084 WO1997016093A1 (fr) 1995-11-02 1996-10-30 Piece moulee en mousse avec element d'ancrage integre dans la mousse

Publications (2)

Publication Number Publication Date
EP0959731A1 true EP0959731A1 (fr) 1999-12-01
EP0959731B1 EP0959731B1 (fr) 2002-08-28

Family

ID=7776367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96938969A Expired - Lifetime EP0959731B1 (fr) 1995-11-02 1996-10-30 Piece moulee en mousse avec element d'ancrage integre dans la mousse

Country Status (7)

Country Link
US (1) US5993955A (fr)
EP (1) EP0959731B1 (fr)
JP (1) JP2000512163A (fr)
CZ (1) CZ295648B6 (fr)
DE (2) DE29622614U1 (fr)
PL (1) PL181216B1 (fr)
WO (1) WO1997016093A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2825601B1 (fr) 2001-06-08 2003-09-12 Faurecia Sieges Automobile Siege de vehicule et procede de fabrication d'une matelassure pour un tel siege
JP3735681B2 (ja) * 2002-07-08 2006-01-18 日本発条株式会社 自動車用シート
WO2008145671A2 (fr) * 2007-05-29 2008-12-04 Iee International Electronics & Engineering S.A. Élément de siège rembourré
US7946649B2 (en) * 2007-10-01 2011-05-24 Lear Corporation Vehicle seat assembly having layered seating system with attachment member
JP5578019B2 (ja) * 2010-10-25 2014-08-27 トヨタ紡織株式会社 車両用シートのパッドおよびその製造方法
FR3022194B1 (fr) * 2014-06-11 2016-07-15 Centre D'etude Et De Rech Pour L'automobile (Cera) Matelassure de siege de vehicule automobile
US9776545B1 (en) 2016-03-30 2017-10-03 Lear Corporation Attachment port

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3649974A (en) * 1969-12-15 1972-03-21 Universal Oil Prod Co Vehicle seat
US3649975A (en) * 1969-12-22 1972-03-21 Will Ray Spurgeon Shop tool
US3961823A (en) * 1974-09-09 1976-06-08 General Motors Corporation Vehicle seat bolster wire assembly
US4452488A (en) * 1981-12-11 1984-06-05 General Motors Corporation Seat assembly
US5538785A (en) * 1990-11-14 1996-07-23 Dingler; Gerhard Construction element
DE4446450C1 (de) * 1994-12-23 1996-04-04 Johnson Controls Gmbh & Co Kg Befestigungselement zum Einschäumen in ein Schaumteil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9716093A1 *

Also Published As

Publication number Publication date
US5993955A (en) 1999-11-30
CZ134398A3 (cs) 1999-06-16
PL181216B1 (pl) 2001-06-29
DE29622614U1 (de) 1997-04-10
EP0959731B1 (fr) 2002-08-28
JP2000512163A (ja) 2000-09-19
CZ295648B6 (cs) 2005-09-14
DE59609610D1 (de) 2002-10-02
PL326321A1 (en) 1998-09-14
WO1997016093A1 (fr) 1997-05-09

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