DE3047418A1 - Preformed roof lining for automobile - has protective edge strips esp. longitudinally to prevent damage during handling - Google Patents

Abstract

A preformed internal lining for an automobile roof comprises a rigid polymer foam shell. The edges of this shell, at least the longitudinal edges, are equipped with reinforcement rendering them insensitive to mechanical forces and thus protecting them from damage. The reinforcement may have a U-section, L-section or T-section. Alternatively the reinforcement may be a strip or band fitted along the edge. Pref. material for the reinforcement is impact-resistant thermoplastics, or crosslinked plastics, opt. contg. organic and/or inorganic reinforcing fibres. The reinforcement of the edges is designed to protect them from mechanical damage during handling, transport and installation. In a variant the reinforcement may be formed by fusing the foam along the edge of the shell so that the protective strip is an integral part of the shell.

Description

Preformed interior trim for motor vehicle roofs.

The present invention relates to a preformed interior trim for motor vehicle roofs, which contains a rigid polymer foam shell. Such preformed Built-in parts - so-called prefabricated headliners - are usually built up in several layers, whereby the rigid foam shell generally serves as a load-bearing, dimensionally stable element.

A disadvantage of the rigid polymer foams that are suitable for this application is the sensitivity of the edges of panels or trays made from it, which possibly already through relatively small impulsive or scraping forces can be injured. Such prefabricated headliners must therefore be used during manufacture and storage as well as during shipping and assembly are handled with extreme care to avoid edge damage; all the more so because of edge damage possibly make an entire prefabricated headliner unusable and thus too considerable Can lead to scrap costs.

The present invention is therefore based on the problem of complex To make precautionary measures for the prevention of edge damage superfluous and Avoid scrap costs.

According to the invention, this object is achieved in that the edges the rigid foam shell, but at least the one that runs in the longitudinal direction of the vehicle Edges that have a reinforcement that is insensitive to the effects of mechanical forces.

In the attached drawing, the subject of the application is different advantageous embodiments shown: Fig. 1 shows in a simplified representation the overall view of a finished sky or the rigid foam shell 1 supporting it. In the version shown, only those particularly endangered or

claimed longitudinal edges 3 provided with a reinforcement 4, while the transverse edges 3 'are exposed.

Fig. 2 gives various advantageous embodiments of the invention Edge reinforcement and their structural arrangement again. In Fig. 2 a to d the reinforcement as an enclosure 4.1, 4.2, 4.3, 4.4 with a U-, L- or T-shaped cross-section formed, wherein it can be fitted flush or encompass the edge. In Fig. 2 e and f, the reinforcement 4.5, 4.6, 4.7 is designed in the shape of a strip or strip, where - as Fig. 2 f shows - two strips or bands 4.6 and 4.7 along their the edge 3 protruding edges can be glued or welded together. Representing possible additional decorative, upholstery and / or insulating Layer components of the finished sky is a flat structure in the drawing 2 indicated.

The edge reinforcements described above are preferably made from an impact-resistant thermoplastic, e.g. an ABS copolymer, or from a crosslinkable plastic, e.g.

a polyester resin. For example, they can also consist of a piece of paper The material of the reinforcements can be an additional improvement through storage learned about organic and / or inorganic fibers. The fastening of the reinforcements at the edges 3 resp.

3 'is preferably frictional.

Fig. 3 shows a further advantageous edge reinforcement 4.7, the formed by superficial fusing of the foam structure along the edge 3 and in this way is an integral part of the rigid foam shell 1.

The last-mentioned variant of the subject of the application stands out by a particularly simple, inexpensive manufacturing process that thereby is characterized in that the rigid polymer foam plate that forms the shell 1, before or after their deformation along their longitudinal edges 3 and / or their transverse edges 3 'is heated so that the foam surface melts in the edge area. the surface heating of the edges is preferably carried out with the aid of heated contact surfaces or by means of a correspondingly limited hot air flow.

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Claims (12)

Claims 1. Preformed interior cladding for motor vehicle roofs, which contains a rigid polymer foam shell, characterized in that the edges (3, 3 ') of the rigid foam shell, but at least the one that extends in the longitudinal direction of the vehicle Edges (3), a reinforcement insensitive to mechanical forces (4) exhibit. 2. Interior lining according to claim 1, characterized in that the reinforcement as a border (4.1, 4.2, 4.3, 4.4) with a U-, L- or T-shaped cross-section is trained. 3. Interior lining according to claim 1, characterized in that the reinforcement as a strip attached to the front and / or back of the edge or band (4.5) is formed. 4. Interior lining according to claim 3, characterized in that the strips or bands (4.5, 4.6) of the front and back along their the edge (3) protruding edges are glued or welded together. 5. Interior lining according to claim 1 or 2, characterized that the reinforcement (4) consists of an impact-resistant thermoplastic. 6. Interior lining according to claim 1 or 2, characterized that the reinforcement (4) consists of a crosslinkable plastic. 7. Interior lining according to one of claims 1 to 6, characterized in that that the reinforcement contains organic and / or inorganic fibers. 8. Interior lining according to one of claims 1 to 7, characterized in that that the reinforcement (4) is positively connected to the edge (3). 9. Interior lining according to claim 1, characterized in that the reinforcement (4.7) by fusing the foam structure along the edge (3) formed and in this way an integral part of the rigid foam shell (1). lo. Process for the production of interior linings according to claim 9, characterized in that the rigid polymer foam plate that forms the shell 1, before, during or after their deformation along their longitudinal edges (3) and / or their Transverse edges (3 ') is heated so that the foam surface melts in the edge area. 11. The method according to claim lo, characterized in that the superficial The edges are heated by means of heated contact surfaces. 12. The method according to claim lo, characterized in that the superficial The edges are heated by means of hot air.