Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
  • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
  • B60N2/58—Seat coverings
  • B60N2/5816—Seat coverings attachments thereof
  • B60N2/5883—Seat coverings attachments thereof by sewing, stitching or threading
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/07—Flat, e.g. panels
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/07—Flat, e.g. panels
  • B29C48/08—Flat, e.g. panels flexible, e.g. films
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
  • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
  • B29C48/154—Coating solid articles, i.e. non-hollow articles
  • B29C48/155—Partial coating thereof

Definitions

• the invention relates to a fastening element for fixing a textile material, in particular an upholstery cover, under pretension on a, in particular upholstered, seat element or the like, with a head profile which can be fixed on the seat element and which is connected to a sewing tab to be sewn from the textile surface material, wherein the head profile encloses the surface material on one of its long sides between two opposite head profile legs, as well as a method for producing a fastening element and a device for producing a fastening element.
• Fastening elements of this type are used in the case of upholstered seats to bring the upholstery material attached to a suitable base into the desired shape suitable for the seat.
• the cover fabric is sewn onto a sew-on flag, which is provided with a head profile, which is then fixed essentially transversely to the outer surface of the cover fabric lying on the upholstery material in the area of the upholstery material, thereby producing a seam-like curvature in the cover fabric.
• EP 403 815 B1 describes a fastening element made up of a profile bar which has a two-legged cross-sectional profile, the profile legs including a sew-on tab, in that the sewing tab is firmly welded to the adjacent inner surfaces of the two profile legs.
• the object of the present invention is to provide a simply constructed, stable fastening element while avoiding the disadvantages of the prior art.
• the object is achieved according to the invention in that the head profile is extruded onto the long side of the surface material and the surface material between the textile threads has continuously open spaces in the normal direction of the surface material, the head profile material having the spaces between the head profile legs, each of which is formed in one piece with both head profile legs and passes through between these holding material bridges, so that the surface material is permanently connected to the head profile under the pre-tension.
• the fastener is simple. It only consists of a head profile and a sew-on flag, i.e. essentially two parts. Due to the holding material bridges that run through the gaps in the surface material, there is a strong connection between the two head profile legs, which is also made of the same material as the head profile itself. The holding material bridges are created during the anextrusion process and thus together in one process with the manufacture of the head profile. They form a direct, almost right-angled connection between the head profile legs. There is thus a simple and secure connection between the head profile and the sewing flag. The head profile does not have to be produced in an additional operation, but is extruded onto the sew-on flag.
• the holding material bridges also stabilize the textile in the area of the head profile, since almost the entire free volume (corresponding to the gaps) between the head profile legs is filled with head profile material and improve the pull-out security of the sewing flag from the head profile.
• This is particularly interesting for upholstered seat covers, as they are exposed to heavy loads that act on the sewing flag in different directions.
• the textile absorbs the forces on the one hand and on the other hand the textile gives way slightly, so that a continuous, pre-tensioned, not too abruptly changing force affects the head profile area.
• the head profile need not necessarily be formed in one piece by an additional connection.
• the head profile legs can also be two opposite individual strips, which in turn are then connected by holding material bridges.
• a flexible head profile that can withstand changing forces during use without damage and that can be used repeatedly, for example, in the event of failed attempts in production, is provided that the head profile consists of an extrudable thermoplastic.
• the head profile is extruded onto the surface material taking into account the melting points, the viscosity of the melted thermoplastic, the wetting properties of the head profile material, the flat material and the thickness of the surface material with an adapted extrusion speed such that an intimate connection of the head profile material with the Surface material is guaranteed and the holding material bridges between the head profile legs provide the pull-out security.
• the different parameters many different material combinations can be used for the head profile and sew-on flag, all of which ensure good pull-out safety.
• thermoplastic thermoplastic
• surface material An important parameter for ensuring pull-out safety is the size and shape of the spaces depending on the material properties of the thermoplastic and the surface material. These are coordinated in such a way that the holding material bridges provide pull-out security under the pre-tension.
• a low load on the surface material per unit area is given if the covering of the surface material by the head profile legs is so large that a surface of the surface material that provides pull-out security is penetrated by holding material bridges.
• the number of spaces required to provide a secure hold can be easily determined.
• a greater or lesser coverage of the head profile with the surface material can then be used, without fundamentally having to change anything in the structure of the fastening element.
• thermoplastic of the head profile and the surface material consist of the same type of plastic, the surface material in the extrusion process having to be brought to its melting point with a sufficient temperature difference. Due to the uniformity of the materials, the fastener can be recycled well.
• the plastic types of surface material and head profile can consist essentially of the same constituents, for example of a polymer with the same monomers or essentially the same monomers, but the types of plastic, for example, due to different densities (e.g. high density for the surface material and lower density for the head profile), may have different melting points and strengths.
• thermoplastic of the head profile is an ABS thermoplastic (in particular a polymer made from the monomers acrylonitrile, butadiene, and / or styrene) with a Shore hardness of approximately 100 and the surface material is essentially made of polypropylene with a Shore hardness of 97.
• a further improved pull-out security is provided if the surface material is additionally thickened on the longitudinal side enclosed by the head profile legs in the area of the surface enclosed by the head profile legs.
• the thickening can be produced by a multilayer structure.
• a simple and at the same time very durable type of thickening is supplied if the surface material has a thicker seam on the long side enclosed by the head profile legs.
• the end seam is advantageously penetrated by individual threads protruding from the surface material on the longitudinal side enclosed by the head profile. As a result, a larger surface is formed for enclosing with head profile material.
• a simple and durable construction of the surface material is provided if the surface material is a woven fabric, a scrim or the like, the interstices being formed by meshes.
• a transition zone between the head profile and the surface material, which reacts very flexibly to changing force attack, is present if the spaces are approximately rectangular and at least in the area of the long side of the surface material enclosed by the head profile legs, the extension of the spaces in the direction of the long axis of the cross section of the head profile is smaller than across it.
• Another object of the present invention is to provide a simple and safe method for producing fastening elements.
• the object is achieved by a method for producing a fastening element according to claim 16.
• a method for producing a fastening element is proposed, wherein a head profile is attached to a surface material, in particular for producing a fastening element according to one of claims 1 to 15, wherein the head profile is extruded onto the surface material in an area in which the surface material has gaps , wherein the extrusion is carried out in such a way that the head profile material passes through the an extrusion mold together with a corresponding longitudinal section of the surface material at the extrusion temperature, the head profile material penetrating through the spaces of the surface material which lie between the head profile legs and holding between the head profile legs. Material bridges are formed, which provide pull-out security after cooling.
• extrusion parameters such as the extrusion temperature, in particular the extrusion speed, and the angle at which the extrusion material is brought up to the sheet material, and taking into account the melting points, the viscosity of the melted thermoplastic, and the wetting properties of the two Materials, the thickness of the surface material, good dimensional stability of the head profile is achieved and at the same time an optimal implementation of the spaces with extrusion material.
• Another object of the present invention is to provide a tool for producing a fastening element.
• a through opening of the anextrusion tool corresponds to the cross section of the surface material, and a parallel and.
• a good pressing of the head profile material onto the surface material is ensured if the feed channel for the head profile material has a clear width tapering in the extrusion direction towards an exit opening of the head profile, in particular a tapering width.
• FIG. 1 shows a cross section through a fastening element
• FIG. 2 shows a longitudinal section through a fastening element
• FIG. 3 shows a cross section through an extrusion tool.
• the fastening element 1 shows a cross section through a fastening element 1.
• the fastening element 1 consists of a profile head 2 and a sewing tab 3 made of surface material 4.
• the profile head 2 with a maximum height 23 and a width 24 in the direction of a long axis 13, which runs towards the sewing flag 3, extends on a long side 5 of the surface material 4 of the sewing flag 3.
• the profile head 2 has two profile head legs 6 , which have an overall approximately parabolic shape in cross section and enclose the long side 5 of the sheet material 4.
• the cross section of the profile head 2 is tapered in the region 20 facing away from the sewing flag and widens in a parabolic shape over a longitudinal surface 14 of the surface material 4.
• the cross-section shows a recess 22. With the aid of this recess 22, the fastening element is hooked into a holder, not shown, whereby the sewing flag 3 sewn onto a cover fabric (not shown) of a cushion seat is pretensioned between the cover and Head profile 2 is held.
• the surface 14 of the surface material 4 has intermediate spaces 9, which are square in the present exemplary embodiment and are formed as stitches in a textile fabric by textile threads 7 delimiting the intermediate spaces 9.
• the surface material 4 has a thickness 11 in the normal direction 8 to the surface material 4.
• the spaces 9 are filled in the area of the surface 14 with head profile material which is introduced into the spaces 9 during the extrusion process.
• holding material bridges 10 are formed between the head profile legs 6, which enable the flat material 4 to be firmly seated in the head profile 2.
• two longitudinal rows of spaces 9 are passed through by holding material bridges 10, so that a good hold of the sewing flag 3 in the head profile 2 is ensured.
• FIG. 2 shows a longitudinal section through a fastening element 1 with head profile 2 and sew-on lug 3 made of surface material 4.
• holding material bridges 10 have intermediate spaces 9 between delimiting textile threads 7 in the area of the longitudinal side 5.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Aviation & Aerospace Engineering (AREA)
• Transportation (AREA)
• Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=30469117

Family Applications (1)

Country Status (3)

Citations (8)

Family Cites Families (1)

• 2002
  • 2002-07-25 DE DE10233990A patent/DE10233990B4/de not_active Expired - Fee Related
  • 2002-11-13 WO PCT/DE2002/004196 patent/WO2004016137A1/de not_active Application Discontinuation
  • 2002-11-13 AU AU2002350391A patent/AU2002350391A1/en not_active Abandoned

Patent Citations (8)

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