Decorative part for a motor vehicle

Abstract

The invention relates to a decorative part (11) for a motor vehicle and a method for the production thereof, having a carrier part (18) and having a covering part (12) made of a single-pane safety glass, which are connected to each other, wherein a bonding agent layer (17) is applied over the entire surface on a fixing side (16) of the covering part (12) opposite the visible side (14) of the decorative part (12), and a layer made of a thermoplastic elastomer (26) is provided over the entire surface on the bonding agent layer (17), by means of which the carrier part (18) is fixedly connected to the covering part (12), wherein at least one sealing lip (34, 51) is moulded on the TPE layer (26).

Claims

1. A decorative part (11) for a motor vehicle, comprising: a. a covering part (12), the covering part made of a single-pane safety glass having a visible side (14) and a fixing side (16) opposite the visible side, and, a bonding layer (17) applied over the entire fixing side of the covering part, and, a thermoplastic elastomer layer (26) provided over the entire bonding layer, and, b. a carrier part (18) comprising a peripheral frame (22), the peripheral frame stiffened by ribs (23) and openings (24) between the ribs and the peripheral frame, and, the peripheral frame and the ribs each having a contact surface (25) by means of which the carrier part (18) is fixedly connected to the thermoplastic elastomer layer, and, c. wherein the thermoplastic elastomer layer (26) is formed by a back injection of the covering part (12) and whereby at least one sealing lip (51) is formed within the thermoplastic elastomer layer and the at least one sealing lip forming a covering region (54) over at least one of the ribs (23).

2. The decorative part according to claim 1, wherein abutment elements (53) are each formed by back injection and within the thermoplastic layer and protruding beyond the ribs (23) in a direction perpendicular to the fixing side of the covering part.

3. The decorative part of claim 2 wherein at least one of the abutment elements (53) covers at least one of the ribs (23).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Here are shown:

(2) FIG. 1 a schematic view of a decorative part,

(3) FIG. 2 a schematic rear view of the decorative part according to FIG. 1,

(4) FIG. 3 a schematic side view of the decorative part according to FIG. 1,

(5) FIG. 4 a schematic sectional view of an embodiment for an edge region of the decorative part according to FIG. 1,

(6) FIG. 5 a schematic sectional view of a further embodiment of an edge region of the decorative part according to FIG. 1,

(7) FIG. 6 a schematic view of an alternative embodiment of the decorative part to FIG. 1,

(8) FIG. 7 a schematic view along the line VII-VII in FIG. 6,

(9) FIG. 8 a schematic view from the front of an alternative embodiment of a decorative part,

(10) FIG. 9 a schematic rear view of a decorative part according to FIG. 8, and

(11) FIG. 10 a schematic sectional view along the line IX-IX in FIG. 9.

DETAILED DESCRIPTION OF THE INVENTION

(12) A schematic view of a decorative part 11 is depicted in FIG. 1. FIG. 2 shows a rear view and FIG. 3 shows a schematic side view of the decorative part 11 according to FIG. 1. This decorative part 11 is formed, for example, as a column aperture, in particular for a B-column or C-column, or as a further decorative aperture for a motor vehicle. The decorative part 11 consists of a covering part 12 having a visible side 14. A carrier part 18 (FIG. 2) is provided on a rear side to the visible surface 14 of the covering part 12. For example, fixing elements 19, such as screws, pins, clips or similar, for example, can be provided on this carrier part 18 or fixed thereon in order to fix the decorative part 11 to a bodywork or a bodywork opening. The carrier part 18 according to FIG. 2 has a frame structure 21 which comprises a peripheral frame 22, for example, which is stiffened by individual ribs 23. The frame 22 and the ribs 23 have a connection surface 25 for attaching to the covering part 12. Advantageously, an outer geometry of the frame 22 corresponds to the outer geometry of the covering part 12. The regions between the ribs 23 can be formed as openings 24 according to a first embodiment. Alternatively, the frame 22 and the ribs 23 can also be provided on a closed connection surface 25, which is aligned to point to the covering part 12 of the decorative part 11.

(13) The covering part 12 is formed from a single-pane safety glass. This covering part 12 can be formed to be untensioned, partially pretensioned or chemically cured. The covering part 12 can be formed to be planar or curved. A layer made of bonding agent 17 is applied over the entire surface on a fixing side 16 opposite the visible side 14. Thus, the rear side of the visible side 14, which forms the fixing side 16, is covered over the entire surface by the layer made of bonding agent 17.

(14) Furthermore, the decorative part 11 comprises a layer 26 made of a thermoplastic elastomer. This TPE layer 26 also extends over the entire surface to the fixing side 16. This TPE layer 26 is connected over the entire surface to the bonding agent layer 17. Thus, a three-layer compound over the entire surface is formed.

(15) As a result of this construction of the decorative part 11 with the layer made of binding agent 17 and the TPE layer 26, a compound adhered to one another made of three layer is created. This three-layer compound makes a safe use of the decorative part made of a single-pane safety glass possible and, in the event of damage to the single-pane safety glass, prevents a detachment of glass fragments.

(16) The carrier part 18 is connected to the covering part 12 by means of the TPE layer 26 and forms the decorative part 11. The TPE layer 26 is produced by a back-injection of the covering part 12 over the entire surface and fixedly connects the carrier part 18 to the TPE layer 26.

(17) In FIG. 4, a schematic sectional view of an embodiment for an edge region of the decorative part 11 is depicted. Here, the carrier part 18 can have a receiving portion 28, in particular a U-shaped receiving portion 28 open on the edges, in the edge region of the three-layer compound. A sealing profile 30 or a sealing element can be used thereon. This sealing profile 30 can extend along one or more longitudinal sides of the decorative part 11 or across the entire periphery around an edge region of the decorative part 11.

(18) In FIG. 5, a schematic sectional view of a further embodiment of an edge region for the decorative part 11 according to FIG. 1 is depicted. In this embodiment, it is provided, for example, that the TPE layer 26 engages around a rear face 32 of the decorative part 12 with a border 33 made of TPE. The border 33 and the TPE layer are formed integrally. Thus, an edge protection for the decorative part 11 can be created.

(19) Furthermore, it emerges from FIG. 5 that the TPE layer 26 simultaneously has a sealing lip 34. This sealing lip 34 can be formed as an integrated component of the TPE layer 26. The sealing lip 34 and the border 33 can be formed simultaneously or also each individually and independently of one another.

(20) In FIG. 6, a further alternative of the decorative part 11 is depicted. The construction of the decorative part with the three-layer compound consisting of the covering part 12 of the layer made of bonding agent 17 and the layer made of TPE 26 corresponds to the exemplary embodiment above. The carrier part 18 can be formed as a window guide web, deviating from the embodiment described above. Such a carrier part 18 has a U-shaped receiver, in order to receive and guide a seal for a pane that can be moved up and down. The carrier part 18 formed as a window guide web is depicted in a sectional view in FIG. 7.

(21) In addition to the window guide web, the carrier part 18 has a further frame structure 21 for receiving and attaching the covering part 12 to the bodywork.

(22) In the embodiments described above, the bonding agent 17 applied to the fixing side 16 of the covering part 12 over the entire surface is conditioned and is activated by a temperature exposure. An adhesion over the entire surface to the TPE layer 26 is obtained by the activation. This temperature exposure is preferably carried out when back-injecting the covering part 12 for producing the layer made of TPE 26.

(23) An injection moulding system consisting of two injection moulding machines and a handling device can be provided to produce such a decorative part 11. In a first injection moulding machine, the carrier part 18 can be produced in a first cycle. In parallel to this, the covering part 12 with the bonding agent layer applied to the fixing side 16 over the entire surface is placed into a cavity of the second injection moulding machine. This can take place automatically by means of the handling device. Subsequently to or before placing the covering part 12, the carrier part produced in the first injection moulding machine can be transferred and placed in the cavity of the second injection moulding machine. Here, the connecting face 25 of the carrier part is aligned in relation to the covering part 12. The covering part 12 with the bonding layer 17 is aligned to point towards the carrier part 18 in the cavity of the second injection moulding machine. The cavity is then closed. A TPE material is injected into the cavity, in order to back-inject the covering part 12 over the entire surface. At the same time, an attachment of the carrier part 18 to the TPE layer 26 to be formed takes place between the covering part 12 and the carrier part 18. Subsequently, the cavity is opened, the produced decorative part 11 is removed from the cavity and supplied to a reworking station and/or control station.

(24) In the first injection moulding machine for producing the carrier part 18, the hard components are injected, i.e. for example the carrier part 18 made of a plastic material made of PP, PC or ABS. In the second injection moulding machine, a soft component is injected in order to produce the layer made of TPE and the three-layer compound. In addition, a sealing lip, seal and an enclosure or border of the covering part 12 can take place by means of the TPE layer.

(25) FIG. 9 shows a schematic front view or a side view of an alternative embodiment of a decorative part 11. A rear view of the decorative part 11 according to FIG. 8 is depicted in FIG. 9. The principle construction of this decorative part 11 corresponds to the construction according to the described embodiment in FIGS. 1 to 4. The covering part 12 has, for example, an elongated rectangular or slightly trapezoidal contour and comprises longitudinal sides 41, 42 lying opposite one another that are connected by narrow sides 43, 44. The longitudinal sides 41, 42 are a multiple of the length of the narrow sides 43, 44, at least 1.5 times.

(26) To construct the triple compound and to protect the longitudinal sides 41, 42 of the covering part 12, this embodiment comprises a carrier part 18, which is depicted in FIG. 9. Holding portions 46, 47 are respectively provided along the longitudinal sides 41, 42 of the covering part 12, said holding portions laterally pointing outwards comprising a U-shaped receiving portion 28. These receiving portions 28 are depicted in FIG. 4, for example. A further holding portion 48 is provided on a narrow side 44 or a lower holding portion 48. Thus, the carrier part 18 consists of a U-shaped frame structure consisting of these holding portions 46, 47, 48. A rib structure with ribs 23 extends inside the U-shaped frame structure 21. This rib structure is formed diamond-shaped in the exemplary embodiment. This can also consist of squares, hexagons or other geometric shapes strung together. This rib structure can also result in a stiffening of the U-shaped frame structure 21.

(27) Receiver openings for clipping in fastening elements 19 are also provided on the lower holding portion 48. Alternatively, these fastening elements 19 can also be injected directly on the holding portion 48. This applies analogously to an upper fastening element 20.

(28) On its rear side, this decorative part 11 has two sealing lips 51, spaced apart from each other, for example. These sealing lips 51 extend substantially within the frame structure 21 or along the rear side of the covering part 12. These sealing lips 51 consist of the TPE layer 26. The carrier part 18 is connected to the fixing side 16 of the covering part 12 by means of this TPE layer 26. This TPE layer 26 extends over the entire surface on the bonding agent layer 17, which is applied over the entire surface to the covering part 12. In this region, the frame structure 21 having the ribs 23 is fixedly connected to the covering part 12. Furthermore, the holding portions 46, 47, 48, insofar as their edge regions cover the decorative part 12, can also be fixed over the entire surface to the covering edge 12 via the bonding agent layer 17 and the TPE layer 26.

(29) A schematic sectional view along the line IX-IX in FIG. 9 is depicted in FIG. 10. The connection or binding of individual ribs 23 in the region of the sealing lip 51 is illustrated by means of this sectional view. The connecting face 25 of the frame structure 21 is connected to the TPE layer 26. Thus, the frame structure 21 with the ribs 23 is raised in comparison to a continuous surface of the TPE layer 26. The TPE face can also include a part of the height of the ribs 23. However, at least one part of the ribs 23 is not encompassed by the TPE layer 26 along the attachment to the covering part 12. The ribs 23 and their rib structure is thus visible.

(30) The sealing lips 51 preferably extend starting from an upper narrow side 43 of the decoration to a lower holding portion 48 and into this holding portion 48. Advantageously, the sealing lips 51 extend opposite the lower fixing elements 19 and preferably lying between further downwards.

(31) An optimal water guide is adjusted to this course of the sealing lips. Thus, individual ribs 23 are covered in a covering region. For example, such a covering region 54 is depicted in FIG. 10.

(32) Furthermore, preferably when introducing the TPE layer 26, abutment elements 53, in particular abutment buffers, can be simultaneously formed, which extend in opposition to the fixing side 16 of the decorative part 12. These abutment elements 53 can extend freely from the TPE layer 25 or also comprise a covering region 54 with the ribs 23 and are thus aligned identically to the sealing lips 51. Advantageously, the sealing lips 51 and/or the abutment elements 53 have an extension perpendicular to the plane of the covering part 12.

(33) Furthermore, it can be provided in this decorative part 11 that the holding portions 46, 47 have a receiving portion 28, in which sealing profiles 30 are used. The sealing profiles 30 can also be part of an additional soft seal 55, which is formed, for example, as a U-shape. This soft seal 55 comprises triangular regions 57, 58, on the upper end portion holding portions 46, 47. These triangular regions 57, 58 have pockets, such that the holding portions 46, 47 are partially engaged by the front side and by the rear side. Furthermore, the sealing profiles 30 extend from the triangular regions 57, 58 into the lower holding portion 48. This holding portion 48 engages around the lower holding portion 48, as emerges from FIG. 9, and attached directly to the decorative part 11 on the front side. This holding portion 48 is used in the bodywork and cannot be seen from the outside.