DE102010015057B4 - Method for producing an interior trim for a motor vehicle - Google Patents

Abstract

A method for producing an interior trim of a motor vehicle, wherein the interior trim comprises a first carrier part (1) with a foam layer (6) and a second carrier part (2), and wherein the method comprises the following method steps: the foam layer (6) is applied to a foaming tool (12), - the first and the second carrier part (1, 2) are connected to one another in the foaming tool (12), characterized in that the foaming tool (12) has a first and a second part (13 , 14), which are moved towards one another in a closing movement before the start of the application of the foam layer (6) in order to close the foaming tool (12), the first and the second carrier part (1, 2) being caused by the closing movement of the parts ( 13, 14) of the foaming tool (12) are connected to each other, before the closing movement of the parts (13, 14) of the foaming tool (12), the first carrier part (1) in the first part (13) of the foaming tool (12) u nd the second carrier part (2) is introduced into the second part (14) of the foaming tool (12), before the closing movement of the parts (13, 14) of the foaming tool (12), an outer skin (7), which after completion of the inner lining Foam layer (6) can at least partially cover, is introduced together with the second carrier part (2) into the second part (14) of the foaming tool (12), the outer skin (12) through the closing movement of the parts (13, 14) of the foaming tool (12). 7) is clamped between the two carrier parts (1, 2), the foam layer (6) is applied to the first carrier part (1) after the two carrier parts (1, 2) have been connected.

Description

The present invention relates to a method for producing an interior trim of a motor vehicle according to the preamble of claim 1.

A method and an interior lining of the aforementioned type are from DE 10 2005 053 479 A1 famous. The inner lining described therein can be used, for example, as a door inner lining and has two different sections. In each of the sections, a rigid support part is provided, which is designed as an injection-molded part. In the case of one of the sections, the outside of this carrier part also corresponds to the visible side of the interior cladding facing the interior. In the case of the other of the sections, the carrier part is provided with a foam and an outer skin applied to the foam, the outer skin serving as the visible side. The foam gives this section a softer feel. The inner lining is produced in that the individual sections are first injected and optionally foamed and then the sections are then connected to one another, for example by means of a latching connection.

It turns out to be disadvantageous here that a large number of process steps have to be carried out one after the other for the production of the inner lining. Furthermore, it proves to be relatively expensive to delimit the edge of the outer skin cleanly adjacent to the carrier part which is not provided with a foam layer.

FR 2 724 869 A1 discloses a method for producing an interior trim of a motor vehicle, in which a coating of a first carrier part is fixed in that it is clamped in a groove-shaped gap between the two carrier parts.

DE 44 44 455 C1 discloses an interior trim for a motor vehicle, in which a first carrier part is provided with an outer skin and the outer skin is partially held in a non-positive manner between the first and a second carrier part.

The problem on which the present invention is based is to specify a method of the type mentioned at the beginning which is more effective.

This is achieved by a method of the type mentioned at the beginning with the characterizing features of claim 1. The sub-claim relates to a preferred embodiment of the invention.

According to claim 1 it is provided that the first and the second carrier part are connected to one another in the foaming tool. As a result, two process steps can be combined with one another in terms of space and time, so that the process can be made more effective overall.

The foaming tool has a first and a second part, which are moved towards one another in a closing movement prior to the start of the application of the foam layer in order to close the foaming tool, the first and the second carrier part being connected to one another by the closing movement of the parts of the foaming tool. The connection of the two carrier parts by the obligatory closing movement of the foaming tool enables a separate work step for the connection to be saved. This also makes the manufacturing process safer and reduces scrap.

Before the closing movement of the parts of the foaming tool, an outer skin, which can at least partially cover the foam layer after completion of the inner lining, is introduced into the second part of the foaming tool together with the second carrier part. This outer skin is thus also brought into a predeterminable position relative to the carrier parts before the carrier parts are connected to one another. As a result of the subsequent foaming process, the foam forming the foam layer can be introduced between the outer skin and the first carrier part.

After the two carrier parts have been connected, the foam layer is applied to the first carrier part. By reversing the sequence of the process steps compared to the prior art, the process can be carried out more quickly because a cavity that has remained free is filled with foam after the mandatory closing movement of the foaming tool.

Before the closing movement of the parts of the foaming tool, the first carrier part is introduced into the first part of the foaming tool and the second carrier part is introduced into the second part of the foaming tool. In this way it can be ensured that the two carrier parts are pressed against one another by the closing movement of the foaming tool.

It can preferably be provided that the first and the second carrier part are clipped to one another or glued to one another or riveted to one another. On the one hand, these connection methods are easy to implement and, on the other hand, ensure a firm connection between the carrier parts. Instead of the aforementioned types of connection, other, comparable types are also available Connection types are possible that are comparatively easy to implement and ensure a similarly firm connection.

With the types of connection mentioned - clipping, gluing or riveting - this pressing together leads to the creation of the desired connection between the carrier parts.

As a result of the closing movement of the parts of the foaming tool, the outer skin is clamped between the two carrier parts. On the one hand, this securely holds the outer skin on the inner lining. On the other hand, the edge of the outer skin facing the second carrier part does not have to be cleanly processed or cleanly cut off. Rather, the edge of the outer skin can protrude beyond the edge of the second carrier part and be clamped between the carrier parts in this area.

The outer skin is partially held in a non-positive manner between the first and the second carrier part. In particular, the outer skin can be attached to the side of a foam layer applied to the first carrier part which faces the inside of the motor vehicle in the position of use. The force-fit holder then results in an additional attachment of the outer skin that is easy to implement and secure. There is also the possibility that the second carrier part has no foam layer and / or no outer skin. Alternatively, the second carrier part can be constructed similarly to the first carrier part.

It can be provided that the second carrier part at least partially overlaps the first carrier part on the side facing away from the interior space in the use position, the outer skin being arranged at least in sections in the overlap area between the first and the second carrier part. If the carrier parts extend parallel to one another in the overlapping area, a comparatively large contact surface can result, which ensures reliable pressing of the outer skin between the overlapping surfaces of the carrier parts. Furthermore, due to an overlapping area, the edge of the outer skin can protrude beyond the edge of the second carrier part, so that the edge of the outer skin does not have to be processed properly in this area.

There is the possibility that the first and / or the second carrier part have a projection in the overlap area, which protrudes into the area provided for the outer skin. The projection can increase the sealing effect of the foaming tool against undesired foam leakage and thus contribute to process reliability.

An interior cladding produced according to the invention can be designed, for example, as a control panel. The areas that are easily accessible for the user can have the three-layer structure - first carrier part, foam layer, outer skin - which provides an appealing feel. Other areas of the interior trim that are difficult to reach by the hand of the user, such as the areas directly on the windshield, can have a single-layer structure. In particular, a simple carrier part which is not provided with foam and an outer skin and has a, for example, grained surface can be provided in these areas. Due to the implementation of the different areas through the outer skin on the one hand and the simple carrier part on the other hand, there is definitely the possibility of providing these areas with different colors without additional effort.

• 1 einen schematischen Detailschnitt durch eine erfindungsgemäße Innenverkleidung;
• 2 eine schematische perspektivische Ansicht eines geöffneten Schäumwerkzeugs zur Durchführung des erfindungsgemäßen Verfahrens, wobei in das Schäumwerkzeug bereits die Trägerteile und die Außenhaut eingebracht sind.

In the following, exemplary embodiments of the present invention are described in detail with reference to the accompanying figure. It shows

• 1 a schematic detailed section through an interior lining according to the invention;
• 2 a schematic perspective view of an opened foaming tool for carrying out the method according to the invention, the carrier parts and the outer skin already being introduced into the foaming tool.

On the in 1 The side of the interior trim facing the interior of the motor vehicle in the position of use is arranged on the lower side. The interior lining shown comprises a first flat support part 1 and a second flat support part 2 . These carrier parts 1 , 2 can be rigid plastic parts and be designed, for example, as plastic injection molded parts. The outside of the second carrier part facing the interior of the motor vehicle in the position of use 2 can for example have a grained structure.

The first carrier part 1 has a first section 3 , a second section 4th and a third section 5 on. In the first section 3 the first carrier part extends 1 on the side of the second carrier part facing away from the interior space in the position of use 2 essentially parallel to this and only separated from it by a small gap. In which refer to the first section 3 subsequent second section 4th the first carrier part jumps 1 back to then in the subsequent third section 5 to run at a greater distance from the interior.

In the third section 5 is on the side facing the interior in the position of use of the first carrier part 1 a layer of foam 6th and an outer skin that delimits the interior space 7th arranged. The foam layer 6th can consist of a soft polyurethane foam. The outer skin 7th can for example be a soft skin produced by rotational sintering. The outside of the outer skin facing the interior 7th is aligned with the outside of the second carrier part facing the interior 2 so that there is a substantially flat surface facing the interior. It is possible that the outside of the outer skin facing the interior 7th and the outside of the second carrier part facing the interior 2 have different colors or different structures.

The outer skin 7th extends to the end face of the second carrier part 2 and along this to the first carrier part 1 approach. Then the outer skin runs 7th a little way into a space between the second carrier part 2 and the first section 3 of the first carrier part 1 . That is where the outer skin is 7th of the two support parts resting on it 1 , 2 held positively. An additional backup is provided by a ledge 11 on the first support part 1 causes the locally increased force on the outer skin 7th exercises.

On the side of the second carrier part facing away from the interior 2 this has a plurality of clips 8th on that through appropriate openings 9 of the first section 3 of the first carrier part 1 protrude and in this way a form-fitting connection between the first and second carrier part 1 , 2 guarantee. The clips 8th and the openings 9 can in particular be designed to be rotationally symmetrical (see also 2 ).

Due to the fact that the transition area between the clips 8th and the second support part 2 is rounded, has the first section 3 of the first carrier part 1 a plurality of spacers 10 on.

Instead of a clip connection, an adhesive connection or a rivet connection or a comparable connection is also possible.

The interior lining shown can be partially in a foaming tool 12th created (see 2 ). For this purpose, for example, the first carrier part 1 on a first part designed as a top 13th of a foaming tool 12th attached. Furthermore, for example, the second carrier part 2 and the outer skin 7th into a second part designed as a lower side 14th of the foaming tool 12th inserted, in particular so that a section of the outer skin 7th a portion of the second support part 2 overlaps. Then the two parts 13th , 14th of the foaming tool 12th Approached or folded towards one another in a closing movement. The direction of the closing movement is in 2 by the arrow 15th indicated.

This closing movement causes the clips 8th through the openings 9 pressed so that the clip connection between the two carrier parts 1 , 2 is realized. At the same time, part of the outer skin is created by the closing movement 7th between the second support part 2 and the first section 3 of the first carrier part 1 pressed or pinched.

After the end of the closing movement or after closing the foaming tool 12th becomes a foam in the space between the outer skin 7th and the third section 5 of the first carrier part 1 introduced to the foam layer 6th to create.

With the reference number 11 is a down in the plane of the drawing 1 denotes extending projection, which extends from the first section 3 of the first carrier part 1 extends into the space in which the outer skin 7th is pressed. The lead 11 increases the sealing effect of the foaming tool 12th against unwanted foam leakage. Should foam nevertheless escape, it will, for example, due to the distance between the second carrier part 2 and the first section 3 of the first carrier part 1 not to in 1 the visible side arranged at the bottom, but remain inside the interior cladding. The inside of the inner lining has the function of a sacrificial cavity.

List of reference symbols

1

first carrier part

2

second support part

3

first section of the first carrier part 1

4th

second section of the first carrier part 1

5

third section of the first carrier part 1

6th

Foam layer

7th

Outer skin

8th

Clips on the second support part 2

9

Opening in the first support part 1

10

Spacers

11

Protrusion on the first carrier part 1

12th

Foaming tool

13th

first part of the foaming tool 12

14th

second part of the foaming tool 12

15th

Arrow to illustrate the closing movement of the foaming tool 12

Claims (2)

A method for producing an interior trim of a motor vehicle, wherein the interior trim comprises a first carrier part (1) with a foam layer (6) and a second carrier part (2), and wherein the method comprises the following method steps: the foam layer (6) is applied to a foaming tool (12), - the first and second carrier parts (1, 2) are connected to one another in the foaming tool (12), characterized in that the foaming tool (12) has a first and a second part ( 13, 14), which are moved towards each other in a closing movement before the start of the application of the foam layer (6) in order to close the foaming tool (12), wherein the first and the second carrier part (1, 2) by the closing movement of the parts (13, 14) of the foaming tool (12) are connected to one another, before the closing movement of the parts (13, 14) of the foaming tool (12), the first carrier part (1) in the first part (13) of the foaming tool ( 12) and the second carrier part (2) is introduced into the second part (14) of the foaming tool (12), before the closing movement of the parts (13, 14) of the foaming tool (12) an outer skin (7), which after completion of the Inner lining can at least partially cover the foam layer (6), is introduced together with the second carrier part (2) into the second part (14) of the foaming tool (12) by the closing movement of the parts (13, 14) of the foaming tool (12) Outer skin (7) is clamped between the two carrier parts (1, 2), the foam layer (6) is applied to the first carrier part (1) after the two carrier parts (1, 2) have been connected. Procedure according to Claim 1 , characterized in that the first and the second carrier part (1, 2) are clipped to one another or glued to one another or riveted to one another.

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