DE10318432A1 - Molded carrier with at least one self-adhesive tape and process for making such a carrier - Google Patents

Abstract

Carrier obtained by plastic molding with at least one self-adhesive tape (7) with a front surface (7a), which is provided with self-adhesive elements (12), and with a rear surface (7b), which lies opposite the front surface (7a), the rear surface (7b) is sunk in the foam plastic during molding and thus firmly connects the band (7) to the carrier (5). The rear surface (7b) of the band (7) has at least one anchoring element (14) which is completely sunk in the foam plastic and is made of flexible material that can adhere to the foam plastic.

Description

The invention relates to supports obtained by molding at least one self-adhesive tape and the procedure for Manufacture of such carriers.

In particular, the invention relates to a carrier obtained by plastic molding and having at least one self-adhesive band which has a length L along a length and a width 1 transversely and, on the one hand, a so-called front surface which is provided with self-adhesive elements which interlock with complementary holding means of a cover , which at least partially covers the carrier, and on the other hand comprises a so-called rear surface, which lies opposite the front surface, the rear surface at. Forms is sunk in the foam plastic and thus connects the tape to the carrier.

FR 2 761 863 describes a carrier of this type with a self-adhesive tape, the rear surface of which Backing layer is formed from flexible material, which when Forms is partially sunk in the foam plastic. This Backing layer covering the back surface of the self-adhesive Bands forms, extends essentially parallel to Outer surface of the carrier and is recessed in the carrier so that the self-adhesive tape passes into the support surface of the carrier and so a flat support for the complementary ones Holding elements of the cover that at least partially forms the carrier covered.

Since the backing layer covering the rear surface of the self-adhesive tapes, only over a small thickness in the Order of magnitude of 1 to 3 millimeters is sunk in the carrier there is a great risk that the self-adhesive tape will separate from its Carrier releases when excessive force is exerted on the cover that covers the wearer.

FR 2 466 330 describes a volume with essentially U- shaped cross section with a rear and a front Surface with two sections facing each other and form a groove. The front surface that forms the groove is made of fleece that is attached to a protruding band self-adhesive elements, the above tape is added to the cover perpendicular to it.

If too strong forces on the cover and thus on the front Area of the tape in the form of a groove is that Also high risk that the back surface of the tape from their carrier releases.

The object of the invention is to overcome these disadvantages remedy.

For this purpose, an inventive carrier of the type in question is in Mainly characterized in that the rear surface of the band has at least one anchoring element, which in Has essentially the form of an anchoring loop that connected between two with the self-adhesive tape Extends ends and completely sunk in foam plastic and because the anchor loop is over the extends across the entire width of the belt, the Anchoring loop is made of flexible material that can adhere to the foam plastic when the carrier is molded.

Through these arrangements, the anchoring loop can extends across the entire width of the belt and completely is sunk in the foam plastic, prevent the tape from from its carrier when the cover detaches the carrier at least partially covered, forces and for example Deflection stress is exposed.

In addition, the anchor loop is self-adhesive Bands particularly flexible, which makes it possible to use the band at the Manufacture of the carrier by molding foam plastic easy to insert into curved throats of the form.

• - das flexible Material wird unter den Schaumkunststoffen und den Materialien auf der Basis von flexiblen Fasern ausgewählt;
• - die Verankerungsschlaufe wird von einem Streifen aus flexiblem Material gebildet, der quer zum Band verläuft, wobei die beiden Enden des Streifens an den selbsthaftenden Elementen der vorderen Fläche des Bands befestigt sind;
• - die Verankerungsschlaufe ist aus einem Längsabschnitt des Bands gebildet, wobei die beiden Enden der Verankerungsschlaufe aus demselben Material wie das Band sind;
• - die beiden Enden der Verankerungsschlaufe werden vor dem Formen des Schaumkunststoffs durch Befestigungsmittel miteinander verbunden, damit beim Formen des Schaumkunststoffs die Verankerungsschlaufe aus dem Band erhalten werden kann; und
• - die Verankerungsschlaufe weist zwei einander im Wesentlichen zugewandte Wände auf, die vor dem Formen des Schaumkunststoffs durch Befestigungsmittel miteinander verbunden werden, damit beim Formen des Schaumkunststoffs die Verankerungsschlaufe aus dem Band erhalten werden kann.

In preferred embodiments of the support according to the invention, one and / or other of the following arrangements can be used:

• - The flexible material is selected from foam plastics and materials based on flexible fibers;
• - The anchoring loop is formed by a strip of flexible material which runs transversely to the band, the two ends of the strip being attached to the self-adhesive elements of the front surface of the band;
• the anchoring loop is formed from a longitudinal section of the band, the two ends of the anchoring loop being made of the same material as the band;
• - The two ends of the anchoring loop are connected to one another by fastening means before the foam plastic is formed, so that the anchoring loop can be obtained from the band when the foam plastic is being molded; and
• - The anchoring loop has two mutually substantially facing walls, which are connected to each other by means of fasteners before the molding of the foam plastic, so that the anchoring loop can be obtained from the band during molding of the foam plastic.

• - Einfügen des selbsthaftenden Bands in die Kehle der Innenfläche der Form, sodass der Abschnitt der vorderen Fläche des Bands, der sich mit den Halteelementen des Bezugs verhakt, vom Hohlraum zum Formen getrennt ist, wobei sich die Verankerungsschlaufe des Bands über diese Kehle hinaus erstreckt, und
• - Einspritzen eines nicht polymerisierten Schaumkunststoffs, der den Träger bilden soll, in den Hohlraum zum Formen, wobei der Schaumkunststoff die Verankerungsschlaufe vollständig umgibt und bei seiner Polymerisation an dieser haftet.

The invention also relates to a method of making such a carrier as described above, wherein the carrier is molded in a mold having an inner surface defining a cavity for molding and having at least one throat which is substantially self-adhesive in length and width Band corresponds, the process comprising the following steps:

• Inserting the self-adhesive tape into the throat of the inner surface of the mold so that the portion of the front surface of the tape that hooks with the holding elements of the cover is separated from the cavity for molding, the anchor loop of the tape extending beyond this throat, and
• - Injecting a non-polymerized foam plastic, which is to form the carrier, into the cavity for molding, the foam plastic completely surrounding the anchoring loop and adhering to it during its polymerization.

According to another advantageous feature of the method the throat of the inner surface of the mold comprises at least one Cross rib that extends beyond the throat, and at Will insert the front surface of the tape into the throat and pressed against the at least one rib to the Form anchoring loop.

According to a further advantageous feature of the method the anchoring loop from a longitudinal section of the tape formed, the anchor loop before inserting the Bands are formed in the throat of the inner surface of the mold.

Other features and advantages of the invention will become apparent in the course of the following description of several of their embodiments clearly, which are given as non-limiting examples and refer to the accompanying drawings.

Show it:

Figure 1 is a schematic view of a car seat to which the invention can be applied;

FIG. 2 shows a cross section of a seat surface of the seat shown in FIG. 1 according to an embodiment of the invention;

Fig. 3 is a sectional view taken along the line III-III of Fig. 2;

Figures 4 to 7 variants of the anchoring element of the self-adhesive tape, which is sunk in the foam plastic of the seat that forms the carrier.

Fig. 8 is a schematic cross-sectional view of a mold in which the carrier is made, which in this example is formed by an upholstery of the seat shown in Fig. 2;

Figure 9 is a detail view showing one of the hollow throats in the walls of the mold of Figure 8 with a self-adhesive tape inserted into the throat;

Fig. 10 is a partial perspective view of one of the flutes of the form shown in Fig. 9 prior to insertion of the self-adhesive tape;

Fig. 11 is a view similar to Fig. 9 of a second embodiment of one of the hollow grooves in the walls of the mold; and

FIG. 12 is a cross-sectional view of a seat surface obtained by means of a mold which has at least one throat in accordance with the second embodiment according to FIG. 11.

The same or similar elements bear in the different Figures have the same reference numerals.

Fig. 1 shows schematically a motor vehicle seat 1 with a seat 2 , which is mounted on a vehicle floor 3 of the vehicle and carries a backrest 4 .

As shown in FIG. 2, the seat 2 , which forms the carrier according to the invention, comprises an upholstery 5 , which is generally made of foam plastic, in particular of polyurethane foam.

This padding 5 is carried by a rigid metal fitting (not shown) and is covered by a cover 6 made of fabric, leather or other material.

• - zum einen selbsthaftende Bänder 7, die teilweise im Polyurethanschaum, der die Polsterung 5 bildet, versenkt sind und selbsthaftenden Elemente aufweisen, die an der dem Bezug 6 zugewandten Oberfläche der Polsterung 5 vorstehen, wobei die Bänder 7 beispielsweise an der oberen Auflagefläche der Polsterung angeordnet sein können, um für einen flächigen Halt zu sorgen, und/ oder innerhalb von vertikalen Längsschlitzen 11, die in der oberen Fläche 10 geformt sind, um den Bezug 6 in die Schlitze 11 zurückzuholen;
• - und zum anderen Halteelemente 8, die an der Innenfläche 9 des Bezugs 6 in Entsprechung zu den selbsthaftenden Bändern 7 befestigt sind und sich an diesen festhalten können.

The edges of the cover 6 are usually fastened to the rigid fitting which supports the upholstery 5 , and the cover is also fixedly connected to the upholstery 5 at several points by holding devices. These holding devices have:

• - On the one hand self-adhesive tapes 7 , which are partially sunk in the polyurethane foam that forms the upholstery 5 , and have self-adhesive elements that protrude from the surface 6 of the upholstery 5 facing the cover 6 , the tapes 7 being arranged, for example, on the upper contact surface of the upholstery may be to provide flat support and / or within vertical longitudinal slots 11 formed in the top surface 10 to bring the cover 6 back into the slots 11 ;
• - And on the other hand holding elements 8 , which are attached to the inner surface 9 of the cover 6 in correspondence with the self-adhesive tapes 7 and can hold on to them.

In the example shown in FIG. 2, the holding elements 8 of the cover can consist of self-adhesive strips.

The self-adhesive strips 7 and the self-adhesive strips 8 can be arranged in the longitudinal direction of the seat over a large part of the length of the seat surface, but of course other arrangements of the strips 7 and the strips 8 are also possible.

• - eine vordere Fläche 7a, die von einer selbsthaftenden Schicht gebildet wird; diese kann beispielsweise eine durch Extrusion erhaltene Schicht oder eine gewebte oder gestrickte Textilschicht sein, welche die selbsthaftenden Elemente 12 enthält, wobei die selbsthaftenden Elemente jeweils die Form eines Hakens aufweisen können, beispielsweise eines flexiblen Stiels, der mit einer offenen Öse, mit einem aufgeweiteten Kopf, mit einer Spitze in Form eines Hakens oder Ähnlichem endet, wobei sich die selbsthaftenden Elemente 12 am den komplementären selbsthaftenden Elementen in Form einer flexiblen Schlaufe festhalten können, die zu den selbsthaftenden Streifen 8 des Bezugs 6 gehören; die selbsthaftende Schicht 12 und die selbsthaftenden Elemente 8 sind im Stand der Technik gut bekannt und werden insbesondere unter der Marke VELCRO® vermarktet;
• - und eine hintere Fläche 7b, die von einer flexiblen Trägerschicht 13 aus gewebtem Stoff oder Vlies oder aus Schaumkunststoff, etwa aus Polyurethanschaum beispielsweise mit einer Dichte von 15 bis 60 Kilogramm pro Quadratmeter gebildet wird, wobei die Trägerschicht 13 mit der selbsthaftenden Schicht durch Kleben, oberflächliches Verschmelzen der Trägerschicht mit einer Flamme unmittelbar vor dem Anlegen der selbsthaftenden Schicht auf der Trägerschicht 13 oder auf andere Art fest verbunden ist.

In addition, the backrest 4 of the seat is formed by an upholstery, for example of polyurethane foam. This upholstery is also carried by a rigid fitting and is covered by a cover which can also be firmly connected to the upholstery via holding devices 7 , 8, such as those described above. Each self-adhesive tape 7 that is sunk in the padding 5 can be, for example, one as described in FR 2 761 863 and have the following:

• - A front surface 7 a, which is formed by a self-adhesive layer; this can be, for example, a layer obtained by extrusion or a woven or knitted textile layer which contains the self-adhesive elements 12 , the self-adhesive elements each being able to have the shape of a hook, for example a flexible handle, which has an open eyelet with a widened head , ends with a tip in the form of a hook or the like, the self-adhesive elements 12 being able to hold onto the complementary self-adhesive elements in the form of a flexible loop which belong to the self-adhesive strips 8 of the cover 6 ; the self-adhesive layer 12 and the self-adhesive elements 8 are well known in the art and are marketed in particular under the VELCRO® brand;
• - And a rear surface 7 b, which is formed by a flexible carrier layer 13 made of woven or non-woven or made of foam plastic, for example made of polyurethane foam, for example with a density of 15 to 60 kg per square meter, the carrier layer 13 with the self-adhesive layer by gluing superficial fusion of the carrier layer with a flame immediately prior to the application of the self-adhesive layer on the carrier layer 13 or in another way is firmly connected.

The carrier layer 13 can, for example, have a thickness of the order of 3 millimeters with a width 1 of the order of 12 millimeters.

According to the invention the rear surface 7b of the self-adhesive tape 7 at least one anchoring element 14 (Fig. 3), which is completely recessed in the molding of the support 5 formed here by the padding 5 in plastic foam. This anchoring element, which extends over the entire width of the band 7 , is advantageously made of flexible materials that can adhere to the foam plastic when the carrier or the padding 5 is formed .

According to a first embodiment variant , the anchoring element 14 shown in FIGS. 3 and 4 is produced directly from one piece with the band 7 . The anchoring element 14 has the shape of an anchoring loop 15 with two ends 15 a and 15 b, which are made of the same material as the band 7 . The anchoring loop 15 is thus formed by a longitudinal section of the band 7 and held in place by connecting its ends 15 a and 15 b together. The two ends 15 a and 15 b of the anchoring loop 15 can be connected to one another by a clip or a seam 24 or even by gluing before the molding of the foam plastic.

For the manufacture of the carrier or the padding 5 shown in FIG. 2, a mold 16 like the mold shown in FIG. 8 is used, this has an inner surface 17 which defines a cavity for molding 18 , the shape of the outer shape of the padding 5 equivalent.

The inner surface 17 of the mold has two ribs 20 , the shape of which is complementary to that of the slots 11 which are to be formed in the upholstery 5 . These ribs 20 project into the cavity for molding 18 .

The inner surface 17 of the mold is hollowed out in such a way that a plurality of longitudinal grooves 19 are formed, each of which has a somewhat smaller width than the width 1 of the self-adhesive tape 7 . In order to obtain the desired arrangement of the bands 7 on one side of each slot 11 as shown in FIG. 2, grooves 19 are also provided in one of the two side surfaces, which lie opposite each rib 20 of the mold. As is shown in more detail in FIG. 9, a self-adhesive band 7 is guided into each of the throats 19 , one or more anchoring loops 15 having been formed beforehand, which can be distributed regularly or irregularly over the entire length of the throat 19 . Of course, the anchoring loops 15 formed from the band 7 can be arranged exactly at the points where the holding elements 8 of the cover 6 exert high forces on the self-adhesive band, more precisely on its holding elements 12 .

It is thus sufficient, after producing the anchoring loops 15 from the band 7 , to insert the self-adhesive band 7 into the throat 19 of the inner surface 17 of the mold 16 . The portion of the front surface 7b of the tape 7, which is intended to interlock with the retaining elements 8 of the cover 6, is then separated from the cavity for molding 18 by a backing layer 13 which abuts the edges of the throat 19th If the self-adhesive tape 7 is arranged in the throat 19 , the anchoring element 14 , which is formed here by an anchoring loop 15 , extends beyond the throat 19 .

As seen in Fig. 9, that is the longitudinal portion of the backing layer 13, which is arranged in the throat 19, partly enclosed by the polyurethane foam constituting the padding 5 when the padding 5 is formed by injecting polyurethane foam in the mold 16, while each anchor loop 15 is completely submerged in the polyurethane foam. The self-adhesive elements 12 , which are intended to cooperate with the self-adhesive elements 8 of the cover, are in turn at no point in contact with the injected foam, since the corresponding throat 19 is sealed by the carrier layer 13 in a sealed manner.

It is pointed out that the throat 19 can also be incompletely closed by the carrier layer 13 , so that a small amount of polyurethane foam penetrates the throat. In view of the viscosity of the injected polyurethane foam, this only soils the self-adhesive elements 12 of the band 7 on a small area.

When the padding 5 is removed from the mold, the self-adhesive tapes 7 remain firmly connected to the padding 5 by means of the anchoring loops 15 , which were made from longitudinal sections of the tape 7 .

In addition, the anchoring loop 15 according to the embodiment shown in FIG. 4 defines a hollow interior 15 c, into which the polyurethane foam also penetrates during injection.

According to another embodiment variant shown in FIG. 5, the anchoring loop 15 or more precisely its ends 15 a and 15 b can be connected to one another by means of a small textile strip 21 , such as a fleece, which has a clasp of essentially the same width as the band 7 forms. This fleece strip 21 is pressed against the front surface 7 a of the tape or more specifically against the self-adhesive elements 12 , so that the anchoring loop 15 is formed in the throat 19 of the mold 16 before the tape 7 is inserted.

According to another exemplary embodiment shown in FIG. 6, the anchoring loop 15 can be formed from the band 7 and before the carrier 5 is formed by arranging a strip 22 of textile material such as nonwoven between the two essentially facing walls of the anchoring loop 15 becomes. In this case, it is sufficient to press the fleece strip 22 onto a longitudinal section 15 c of the front surface 7 a of the band and then to turn over another longitudinal section 15 d of the front surface 7 a of the band to the anchoring element 14 shown in FIG. 6 to build. In this case, the self-adhesive tape 7 is also arranged in the throat 19 , so that the self-adhesive elements 12 of the front surface 7 a of the tape, which are intended to cooperate with the holding elements 8 of the cover 6 , are arranged directly on the bottom 19 b of the throat 19 and on be pressed.

According to another exemplary embodiment shown in FIG. 7, the anchoring element 14 can also be produced from a strip 23 of flexible material which is not part of the self-adhesive tape 7 . The strip 23 made of flexible material, which can in particular be made of nonwoven, extends between two ends 23 a, which are attached directly to the self-adhesive elements 12 of the front surface 7 a of the tape, so that the strip made of flexible material 23 is an anchoring loop on the rear surface 7 b of the tape forms.

According to another exemplary embodiment shown in FIG. 10, it is also possible to provide the throat 19 with a plurality of transverse ribs 19 a, which are fastened directly to the bottom 19 b of the throat 19 and extend beyond the throat 19 . It is sufficient, when inserting the band 7 , to press the front surface 7 a of the band against the bottom 19 b of the throat and against the transverse ribs 19 a to form open anchoring loops, which are then each essentially U-shaped. After the foam plastic has been injected and hardened, the carrier 5 is then provided with a crenellated band 7 . Because of the flexibility of the self-adhesive tapes 7 and the anchoring elements 14 made of flexible materials, it is possible to arrange the tapes in curved throats of the shape and also to follow surfaces in three dimensions and thereby to fully anchor the self-adhesive tapes 7 in the upholstery 5 to care.

According to another embodiment of the invention shown in FIGS. 11 and 12, the self-adhesive tapes and their anchoring elements 14 can also be arranged on the bottom of the slots 11 of the seat surface or the support 5 and on the upper support surface of the seat surface or the support. In this case, the grooves 19 , which receive the self-adhesive tapes 7 during molding, are provided directly at the ends of the ribs 20 of the mold 16 , so that after the hardening of the plastic, a padding 5 with slots 11 is obtained, the bottom of which with tape 7 is provided as shown in FIG .

In addition, in any case, the support layer 13, which forms the rear surface 7b of the tape 7 can be made of flexible natural or synthetic fibers, for example made of textile fibers, in particular made of felt non-woven.

Likewise, in any case, each self-adhesive tape with its anchoring elements 14 can be arranged in a groove 19 in an element other than the mold 16 , this other element then in a receptacle of complementary shape in the inner surface 17 of the mold 16 and, for example, in the rib 20 is introduced.

Finally, in all cases, all or part of the self-adhesive strips 8 on the cover 6 can be replaced by a continuous layer 25 of loop material (see FIG. 12), which forms the inner surface of the cover 6 .

Claims (9)

1. Carrier obtained by plastic molding with at least one self-adhesive tape ( 7 ) which has a length (L) and a width ( 1 ) lengthways and a so-called front surface ( 7 a) with self-adhesive elements ( 12 ) is provided, which interlock with complementary holding means ( 8 ) of a cover ( 6 ) which at least partially covers the carrier ( 5 ), and on the other hand includes a so-called rear surface ( 7 b) which corresponds to the front surface ( 7 a) opposite, wherein the rear surface ( 7 b) is sunk in the foam plastic during molding and thus connects the band ( 7 ) to the carrier ( 5 ), characterized in that the rear surface ( 7 b) of the band ( 7 ) has at least one anchoring element ( 14 ), which essentially has the form of an anchoring loop ( 15 ; 23 ), which extends between two ends connected to the self-adhesive band ( 7 ) and is completely submerged in the foam plastic, and in that the anchoring loop extends over the entire width ( 1 ) of the band ( 7 ), the anchoring loop ( 15 ; 23 ) is made of flexible material that can adhere to the foam plastic when the carrier is molded. 2. Carrier according to claim 1, wherein the flexible material under the foam plastics and the materials on the base of flexible fibers is selected. 3. Carrier according to claim 1 or 2, wherein the anchoring loop is formed by a strip of flexible material ( 23 ) which extends transversely to the band, the two ends ( 23 a) of the strip ( 23 ) on the self-adhesive elements ( 12 ) the front surface ( 7 a) of the band ( 7 ) are attached. 4. A carrier according to claim 1 or 2, wherein the anchoring loop ( 15 ) is formed from a longitudinal section of the band ( 7 ), the two ends ( 15 a, 15 b) of the anchoring loop ( 15 ) made of the same material as the band ( 7 ) are. 5. Carrier according to claim 4, in which the two ends ( 15 a, 15 b) of the anchoring loop ( 15 ) are connected to one another by fastening means ( 21 ; 24 ) before the foam plastic is formed, so that the anchoring loop ( 15 ) during molding of the foam plastic can be obtained from the band ( 7 ). 6. Carrier according to claim 4, wherein the anchoring loop ( 15 ) has two mutually substantially facing walls ( 15 c, 15 d), which are connected to one another before the molding of the foam plastic by fastening means ( 22 ), so that when the foam plastic is molded Anchoring loop ( 15 ) can be obtained from the band ( 7 ). 7. A method for producing such a carrier according to any one of the preceding claims, wherein the carrier ( 5 ) is formed in a mold ( 16 ) with an inner surface ( 17 ) which defines a cavity for molding ( 18 ) and at least one throat ( 19th ) which essentially corresponds in length and width to the self-adhesive tape ( 7 ), the method comprising the following steps: - Insert the self-adhesive tape ( 7 ) in the throat ( 19 ) of the inner surface ( 17 ) of the mold ( 16 ), so that the portion of the front surface ( 7 a) of the tape ( 7 ), which is with the holding elements ( 8 ) of the Cover ( 6 ) is hooked, separated from the cavity for molding ( 18 ), the anchoring loop ( 15 ; 23 ) of the band ( 7 ) extending beyond this throat ( 19 ), and - Injecting a non-polymerized foam plastic, which is to form the carrier ( 5 ), into the cavity for molding ( 18 ), the foam plastic completely surrounding the anchoring loop ( 15 ; 23 ) and adhering to it during its polymerization. 8. The method of claim 7, wherein the throat ( 19 ) of the inner surface ( 17 ) of the mold ( 16 ) comprises at least one transverse rib ( 19 a) which extends beyond the throat ( 19 ), and in which the front surface ( 7 a) of the band ( 7 ) when inserted into the throat ( 19 ) and against the at least one rib ( 19 a) is pressed to form the anchoring loop ( 15 ). 9. The method of claim 7, wherein said anchoring loop (15) is formed from a longitudinal portion of the tape (7), said anchoring loop (15) prior to insertion of the tape (7) into the throat (19) of the inner surface (17) the form ( 16 ) is formed.