Lining element, and process for manufacturing a lining element

Patent metadata

Field	Value
Publication number	US-11891010-B2
Application number	US-201916577217-A
Country	US
Kind code	B2
Filing date	Sep 20, 2019
Priority date	Mar 23, 2017
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A lining element for use in a vehicle in order to cover an airbag includes a dimensionally stable backing layer with a first predetermined breaking region which is delimited from a surrounding region and/or from a second predetermined breaking region by at least one predetermined breaking line, where a plurality of regularly spaced predetermined breaking points are disposed along the predetermined breaking line.

First claim

What is claimed is:

1. A method for producing a lining element by an injection molding integral foam method, wherein the lining element comprises:
a dimensionally stable backing layer with a first predetermined breaking region which is delimited from a surrounding region and/or from a second predetermined breaking region by at least one predetermined breaking line, wherein a plurality of regularly spaced predetermined breaking points are disposed along the predetermined breaking line, wherein the breaking points are recesses in the backing layer, wherein the backing layer has a visible side and a rear side facing away from the visible side, and wherein the recesses are disposed only on the visible side of the backing layer such that the recesses have a respective depth in the backing layer that reduces a thickness of the backing layer in regions of the recesses to a residual thickness; and
a decorative layer disposed flat on the backing layer on the visible side of the backing layer, wherein a first surface of the decorative layer directly above one of the plurality of regularly spaced predetermined breaking points disposed on the visible side forms a plane together with a second surface of the decorative layer, wherein the second surface is directly adjacent to the first surface and completely surrounds the first surface such that the decorative layer on the visible side of the backing layer does not have any recesses in a region opposite the recesses of the backing layer;
and the method comprising:
injecting a fiber composite material into a cavity formed between a first die side and a second die side of a die to form the backing layer;
compressing the backing layer by bringing the first die side and the second die side of the die toward each other before the cavity formed between the first die side and the second die side has been enlarged in the injection molding integral foam method in order to foam the injected fiber composite material and, via the compressing, forming the recesses in the backing layer by impressing a plurality of projections which are disposed or formed on the first die side into the backing layer;
after the compressing, enlarging the cavity formed between the first die side and the second die side and foaming the injected fiber composite material of the backing layer such that the backing layer is expanded; and
removing the backing layer from the die and disposing the decorative layer flat on the visible side of the backing layer such that the first surface of the decorative layer directly above one of the plurality of regularly spaced predetermined breaking points disposed on the visible side forms the plane together with the second surface of the decorative layer and such that the decorative layer on the visible side of the backing layer does not have any recesses in a region opposite the recesses of the backing layer.

2. The method according to claim 1 , wherein the decorative layer is leather.

3. The method according to claim 1 , wherein the backing layer forms a welding rib on the rear side and wherein at least some of the plurality of regularly spaced predetermined breaking points are disposed opposite the welding rib.

4. The method according to claim 1 , wherein the rear side of the backing layer has a reinforcing network which is disposed on the backing layer or in the backing layer.

5. The method according to claim 4 , wherein the reinforcing network includes aramid fibers.

6. The method according to claim 1 , wherein the recesses have a shape that is cylindrical, cuboidal, conical, or pyramidal and/or wherein edges of the recesses are rounded.

7. The method according to claim 1 , wherein the recesses have a depth of between 1 mm and 4 mm, a width of between 1 mm and 3 mm, a length of between 1 mm and 10 mm, and/or wherein a distance from one recess to a further recess is between 1 mm and 4 mm, and/or wherein the backing layer has a thickness of between 2 mm and 6 mm.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Schwabl Martin

Classifications

• B60R21/2165 Primary

  characterised by a tear line for defining a deployment opening · CPC title

• B29C37/0057

  Moulding single grooves or ribs, e.g. tear lines (folding lines B29C53/06) · CPC title

• B29C44/146

  Shaping the lining before foaming · CPC title

• B29C44/428

  Mould constructions; Mould supporting equipment · CPC title

• B29C69/02

  of moulding techniques only · CPC title