WO2012076158A2

WO2012076158A2 - Composite part with a welded joint

Info

Publication number: WO2012076158A2
Application number: PCT/EP2011/006112
Authority: WO
Inventors: Frank Schäfer
Original assignee: Faurecia Innenraum Systeme Gmbh
Priority date: 2010-12-09
Filing date: 2011-11-30
Publication date: 2012-06-14
Also published as: DE202010016550U1; WO2012076158A3

Abstract

The invention relates to a composite part (1) having a first skin (3), a second skin (4) and a retaining profile (2) which is connected to the first skin (3) and to the second skin (4), wherein the retaining profile (2) has a groove (5) extending in a longitudinal direction, wherein an end region of the first skin (3) and an end region of the second skin (4) are arranged in the groove (5). Since the connection between the first skin (3) and/or the second skin (4) and the retaining profile (2) is in the form of a welded joint (14, 15), it is possible to produce the composite part in a particularly simple manner.

Description

Composite part with welded connection

The invention relates to a composite part with a first skin, a second skin and a retaining profile, which is connected to the first and second skin.

Such a composite part is known from the document WO 2010/105855. This composite part makes it easy to produce a flat seam and at the same time allows a precise adjustment of the seam course. However, it would be desirable to further simplify the manufacture of such a composite part. The object of the invention is therefore to enable a composite part that can be produced even easier.

This object is achieved by a composite part with the features of claim 1. Advantageous developments and refinements emerge with the features of the subclaims. The fact that the connection between the retaining profile and the first and / or second skin is formed as a welded connection, a sewing of the retaining profile with the skins is superfluous. Instead, it is possible to introduce the end portions of the skins in the holding profile and then to heat the holding profile with the skins, for example by hot air. As a result, the retaining profile then melts on the back of the skins and is thus secured with these.

Joining is particularly easy if the holding profile has a groove which is delimited by two side walls and a bottom, wherein the

Side walls connect to an open side of the groove, a first and a second wing, which extends in a direction substantially orthogonal to the longitudinal direction away from the groove. This is followed at each of the two side walls in each case a wing, which extends away from the groove to the outside. Particularly preferably, the wings can each extend orthogonal to the side wall on which they join. An angle between the side wall and connected to this side wall wings is thus substantially 90 °. By "essentially" is meant an angle which deviates by a maximum of 15 °, preferably a maximum of 10 °, from said angle In these embodiments, at least one, preferably both, wings may be welded to one of the skins.

A thickness of the wings may be between 0.05 mm and 1 mm in a particularly preferred embodiment. Thicknesses between 0.2 and 0.6 mm have proven to be particularly suitable. The thickness of the Wing is preferably substantially constant. Furthermore, the wings preferably each have a thickness (ie, extension in the height direction) which is smaller than a depth of the groove. In another embodiment, the wings have a thickness which is at most 80%, 60%, 40% or 20% of the depth of the groove.

Particularly preferably, the retaining profile consists at least partially of a material that has a lower

Melting temperature than a melting temperature of the skins. If the hides are made of a non-thermoplastic, elastomeric or thermoset material, ie if they have no melting temperature but only a decomposition temperature, ie a temperature at which the material chemically decomposes, the melting temperature of the material of the holding profile is preferably less than the decomposition temperature of the hides. Particularly preferably, the holding profile can even have a material that has a lower melting temperature than a Vicat softening temperature (according to DIN EN ISO 306) of the skins. However, the skins are usually at least partially made of a thermoplastic material. For example, the skins may be formed as slush skins formed by melting a thermoplastic resin pellet. Likewise, the skins may be formed by fusing a plastisol to a heated mold. Regardless of the exact formation of the skins is achieved by the preferred low melting temperature of the material from which the holding profile is at least partially, that when welding the holding profile with the back of the skins no visible ma- terialveränderung on the visible side of the skins occurs. It has been found that a connection by welding the holding profile to conventional materials for molded skins does not always lead to a sufficiently good connection. Therefore, it is preferred if a coating which also has a lower melting temperature than the skins is applied to the back of one or both skins.

In a further advantageous embodiment, the retaining profile as a material thermoplastic polyethylene. Likewise, another thermoplastic elastomer, for example a thermoplastic

Copolyester be used as a material for the retaining profile. It is preferred if the first material is a preferably extruded plastic and has a Shore hardness (preferably Shore A hardness) between 25 and 100, preferably between 40 and 70. A holding profile produced from a corresponding plastic has the necessary softness for complicated curved seam courses. In addition, it is possible by means of the extrusion process to produce any desired length retaining profiles, wherein the longitudinal direction of the holding profile or the groove substantially coincides with the extrusion direction.

As the material for the skins, it is preferable to use PVC or polyurethane. As a material for a coating disposed on the back of the skins, polyamide may preferably be used.

In a particularly advantageous embodiment, at least one pin connects to the underside of the bottom of the groove. In this way, the holding profile with the skins can be particularly easily positioned in a recess of a carrier. A special Reliable positioning of the holding profile in a recess of a carrier is possible if connect to the pin at least one, preferably two anchors.

In a particularly preferred embodiment, the skins are connected at their end portions by at least one seam. As a seam, not only a seam comprising a yarn, but also a connection of the two end portions of the hides by a bond or a weld should be considered. The at least one seam is preferably located entirely within the groove of the profile, i. The retaining profile itself is not sewn into the seam. Furthermore, it is advantageous if the seam is designed as a functional seam. Through the seam, the end portions of the two skins can be joined prior to insertion into the groove. This ensures that the two skins are correctly aligned with each other. The seam runs in the longitudinal direction and preferably connects the end portions over their entire length. In addition to the seam described above, additional seams, in particular decorative seams, can be provided.

In a preferred embodiment, the retaining profile extends over the entire length of the seam connecting the skins. This improves the reliability of the positioning by the retaining profile over the entire length of the seam course.

The composite part may preferably comprise a fold-over region in which a height of the holding profile is reduced. In this case, the height of the holding profile is understood to be the extent of the holding profile in an opening direction of the groove and orthogonal to the longitudinal direction. By reduced in a Umbugbereich height bending of the holding profile is made possible. As a result, the retaining profile can be guided around a Umbug together with the skins. Thus, even for composite parts with hinges a reliable adjustment of

Seam over its entire length allows.

In a preferred embodiment, the

Umbugbereich arranged in an edge region of the holding profile. This makes it particularly easy to produce a holding profile with such a Umbugbereich.

The height in the fold region can be reduced, for example, by shortening or cutting off a pin connected to the groove base as described above. In this way, if present, an anchor can be separated in the Umbugbereich.

The length of the Umbugbereich or the Umbugbereiche may, for example, each between 10 mm and 40 mm, between 15 mm and 30 mm or between 20 mm and 25 mm. The aforementioned seam connecting the skins preferably passes through the entire

Umbugbereich or at least the majority of the Umbugbereichs. A residual height of the holding profile in the Umbugbereich may for example be between 1.5 mm and 3 mm, between 1.8 mm and 2.7 mm or between 2, 1 mm and 2.4 mm. The composite part may also comprise, in addition to the already mentioned components, a carrier having a recess. The holding profile can then be introduced into the recess of the carrier. The wings of the holding profile are preferably adjacent to the recess on the front of the carrier. The recess may preferably comprise a carrier groove. This can, for example, have a cross-section which is constant in the longitudinal direction over a large part of the length of the composite part. A shape of the carrier groove can correspond to a shape of the holding profile. A particularly strong connection between the holding profile and the carrier groove is possible if the Trägerernutgraben is formed as an undercut. By this it is meant that a width of the trench groove trench at the bottom thereof is greater than one

Width of the carrier groove at its upper edge. In such an embodiment, it is preferred, for example, if the pin and / or the anchor has a greater width than the carrier groove at its upper edge. If then the pin, possibly with the anchor, pressed into the support groove, creates a

Hintergreifung, which makes it difficult to pull out of the holding profile in the direction of the open side of the groove. The resulting connection can also be used as positive connection, as toothing, blocking, or as

Lock be designated.

However, embodiments are also possible in which the carrier groove has a carrier groove width which is constant over the height. In these embodiments, the pin and / or the anchor are preferably formed so that a pressure between the armature and the truss groove trench arises in the lateral direction. Pulling out of the holding profile is then prevented by a static friction between the Trägernutgraben and the anchor or pin. The resulting connection can also be referred to as a non-positive connection.

The carrier groove preferably opens at an end lying in the region of the fold in a notch in the carrier. The notch preferably has substantially the same width as the carrier groove outside the fold region. As a width, the extension of the notch orthogonal to the longitudinal direction and orthogonal to the opening direction of the groove of the holding profile is characterized. In the region of the notch, the recess has no carrier groove bottom, so that from the front side of the carrier, the holding profile can protrude into the notch as in the region of the carrier groove, wherein the holding profile with the skins around an am

End of the notch arranged edge of the carrier is bent and can protrude with the, preferably by substantially 180 °, bent part of the back of the wearer in the notch.

Particularly preferably, the retaining profile can be recessed by at least 30 ° and preferably by at least 45 °, 60 ° or 90 °. Likewise, a Umbug by up to substantially 180 ° is possible. In a further embodiment, a bending radius of the retaining profile measured at the bottom of the bottom of the retaining profile in at least one Umbugbereich is less than 20 mm, 10 mm or 5 mm. In addition or as an alternative to the bending of the retaining profile in the vertical direction, the retaining profile can be arranged tilted at least in regions relative to an opening direction of the recess. This means that the retaining profile is tilted about a longitudinally extending axis relative to a mounting slot in which the side walls of the groove (ie the opening direction of the groove) run parallel to the opening direction of the recess (also called demolding direction) of the recess. For example, a maximum tilt angle may be less than 30 ° and preferably between 1 ° and 12 °. Further details of the retaining profile and the composite part, in particular with respect to the first skin, the second skin, the wing (including a possible formation with teeth or with slots), the side walls, the bottom, the groove, the support groove (which in the context of this invention arranged in the lower material instead of in the carrier and is referred to as Positionierut), the pin, the formation and arrangement of the / anchor (s) connecting the skins

Seam, the end portions, the connection of the holding profile with the recess, the materials from which the holding profile and the first and second skin and the carrier are made can be taken from the already mentioned document WO 2010/105855, which to this extent forms part of The disclosure of the present application is made. Likewise, this document further details of the method for producing a composite part, in particular be borrowed lent of connecting the first and the second skin or their end portions with each other. Also in the context of these features mentioned, the cited document is part of the disclosure of the present application.

Embodiments of the invention are explained below with reference to the figures. FIG. 1 shows a first embodiment of a composite part according to the invention,

FIG. 2 shows a detail of the composite part from FIG. 1, FIG. 3 shows the composite part from FIG. 1 together with a carrier, FIG. 4 shows a perspective view of the carrier from FIG. 3 from a perspective obliquely from above,

Figure 5 is a perspective view of the carrier of Figure 3 from a perspective obliquely from below and

FIG. 6 shows a longitudinal section along the groove of the composite part from FIG. 3.

A preferred embodiment of a composite part 1 is shown in FIG. The composite part 1 comprises a retaining profile 2, a first skin 3 and a second skin 4. The retaining profile 2 has a longitudinal direction, i. in the direction orthogonal to the plane of the drawing, extending groove 5, which is bounded by a first side wall 6, a bottom 7 and a second side wall 8. The skins 3 and 4 have end portions 9 and 10 which are arranged in the groove 5 of the holding profile 2. The end portions of the skins 9 and 10 are joined together by a seam 11, the seam 11 preferably being formed prior to the insertion of the end portions 9 and 10 into the groove.

Furthermore, the retaining profile 2 has a left wing 12 and a right wing 13, which adjoin the first side wall 6 and second side wall 8 at the upper edge of the respective side wall at the open end of the groove and extending away from the groove to the outside , The wings 12 and 13 extend in a direction substantially orthogonal to the longitudinal direction. Furthermore, the wings 12 extend in a direction substantially to the side walls 6 and 8 orthogonal direction.

The wings 12 and 13 are connected to the skins 3 and 4 by welds 14 and 15. The welded joints can be produced, for example, by heating the retaining profile with the huts already introduced by hot air until the wings 12 and 13 are fused to the back sides 16 and 17 of the skins 3 and 4, respectively. The area bounded by the circle 18 of the composite part

1 is shown in FIG. 2 as a detailed view.

In FIG. 2 it can be seen that in the area in which the wing 12 is welded to the skin 3, a coating 19 is applied to the back 16 of the skin 3. A particularly good adhesion between the wing 12 and the skin 3 can be achieved if the coating 19 consists of polyamide. Likewise, it is conducive to a stable formation of the welded joint 14 if the wing 12 is made of thermoplastic polyethylene or another thermoplastic elastomer, for example a thermoplastic copolyester. The skins 3 4 may be made of PVC or polyurethane, for example. The melting point of the blade 12 is preferably lower than the melting point and the decomposition temperature of the skin 3. The decomposition temperature is understood to mean the temperature at which the material from which the skin is chemically decomposed. This makes it possible that a welded joint is formed by hot air, without changes in the skin 3 occur. As a result, an adverse effect on the appearance of the skin 3 is avoided by the welding. Furthermore, it is advantageous if the Vicat

Softening temperature (according to DIN EN ISO 306) of the gels 12 is lower than the Vicat softening temperature of the skin 3. This also prevents a change of the skin 3 during welding. Even more preferably, even the melting temperature of the blade 12 is lower than the Vicat softening temperature of the

Skin 3. As a result, a melting of the top of the wing 12 for the purpose of forming the welded joint 14 is possible, in which case the risk of deformation of the skin 3 does not occur.

It is likewise advantageous if the coating 19 also has a lower melting temperature and / or a lower Vicat softening temperature than the skin 3. It is also advantageous for the coating 19 if a melting temperature of the coating 19 is smaller than a Vicat softening temperature of the skin 3.

It can also be seen in FIG. 2 that, outside the region in which the wing 12 is connected to the skin 3, an adhesive layer 20 is applied to the back 16 of the skin 3. In an alternative embodiment, the coating 19 is applied on the entire back of the skin 3. In these embodiments, the adhesive layer 20 is preferably applied to a rear side of the coating 19 facing away from the skin 3 outside the region in which the wing 12 is connected to the skin 3. In the same way as shown in the detail view of FIG. 2 for the connection 14 between the left wing 12 and the skin 3, the connection 15 between the wing 13 and the skin 4 may also be formed.

As is further shown in FIG. 1 relative to the groove 5 and the two wings 12 and 13, the retaining profile comprises a Fen 21, which adjoins the bottom of the bottom 7. In this embodiment close to the pin 21 two anchors 22 at. However, embodiments with only one anchor or with more than two anchors are possible as well. It is also possible to completely dispense with anchors.

FIG. 3 shows the composite part 1 from FIG. 1 supplemented by a carrier 23. The carrier 23 has a recess 24, in which the retaining profile 2 is introduced. The armature 22 exert a pressure against the side walls of the recess 24 and thus prevent withdrawal of the profile 2 from the recess 24 by forming a frictional connection. In addition to the carrier 23, the in

FIG. 3 shows a soft region 25, which is arranged next to the wing 13. The soft portion 25 may be made of a foamed material or a knitted fabric, for example. The soft area 25 changes the feel of the composite part in this area.

The carrier 23 has in this embodiment, a curved top, wherein the wings 12 and 13 of the holding profile 2 the course of the top of the

Follow carrier and thus are curved as well. An angle between the side walls 6 and 8 of the groove 5 and the wings 12 and 13 deviates slightly from 90 °.

The carrier 23 of the composite part shown in Figure 3 is shown in perspective in Figures 4 and 5. FIG. 4 shows a perspective view obliquely from above, while FIG. 5 shows a representation from below. The relative

Perspective of Figures 4 and 5 to each other can be in the process, with reference to the front inner surface 26, the front edge 27 and the carrier groove front side 28 visible in both figures. In FIGS. 4 and 5 it can be seen that the

Recess of a support groove 29 having a substantially constant over its length cross-section, and a notch 30 which is arranged in the front region of the carrier 23, composed. The carrier groove 29 has a carrier groove bottom and is thus closed at the bottom. The notch 30, however, is, as can be seen particularly well in Figure 5, also open towards the bottom. In addition to the support groove 29 and the notch 30, the support 23 has recesses 31 and 32 extending longitudinally adjacent to the support groove 29. The recesses 31 and 32 serve to sunk the wings 12 and 13 of the composite part 1, so that an upper side of the wings 12 and 13 passes without height offset in the surrounding surface of the carrier 23.

If a composite part 1, as shown in FIG. 1, is introduced into the recess 24 with the retaining profile 2, the retaining profile 2 with the skins 3 and 4 can be bent around the front edge 27 of the support 23.

Due to the notch 30 a Umzuschgen by 180 ° is possible. The retaining profile extends from both above and with the bent part from below into the notch. The pin 21 of the retaining profile 2 is shortened or separated in the area of the umbilicus, wherein preferably at least one, preferably all, anchor 22 is also separated. As a result, a flexibility of the holding profile 2 is increased in the region of the Umbugs. More details regarding the formation of the umbug, the carrier, the carrier groove and the

Indentification of the wearer is the German patent with reference to file number 10 2010 045 719.1, which in this context forms part of the disclosure of the present application. A cross-section through the carrier 23 along the center of the recess 24 in the longitudinal direction, after the composite part 1 of Figure 1 has been positioned in the recess 24 is shown in Figure 6. In this view, the side wall 8 of the retaining profile 2, the skin 4, the groove bottom 6 and the pin 21 can be seen.

The pin 21 (shown hatched in the drawing) is separated from a cutting edge 33. The ausgebugte terminal portion of the retaining profile 2 thus has no pin and no anchor. Although in this view, strictly speaking, the leading edge 27 of the carrier 23 would not be visible, it has been drawn for clarity. It can also be seen that, outside the region of the umbilicus, the carrier has a carrier groove bottom 34. In contrast, in the region of the bend, the carrier 23 has the notch 30, so that the bent part 35 of the holding profile 2 can protrude into the same from the rear side of the notch. In the illustrated embodiment, the

Support preferably made of polypropylene, glass fiber reinforced polypropylene or a natural fiber material. In alternative embodiments, however, instead of a carrier with a recess, a soft lower material with a recess may be provided. This in turn can be positioned on a support. The positioning of the holding profile in a recess of a soft lower material is shown in more detail in the German patent application with the file number 10 2010 045 729.9, wherein any features relating to the formation of the lower material and the application of the sub-material on a carrier should be part of the disclosure of the present application.

In addition, any embodiments of document WO 2010/105855 modified to provide welds instead of a seam between the wings and the skins are intended to be part of the present disclosure. Likewise, any embodiments of the previously mentioned applications with the file numbers 10 2010 045 719.1 and 10 2010 045 729.9, each modified to the effect that instead of a seam or seams between the wings and the skins corresponding

Welded joints are provided to be considered part of the disclosure.

Claims

claims

Composite part (1) having a first skin (3), a second skin (4) and a retaining profile (2) connected to the first and second skin (3, 4), the retaining profile (2) being in a longitudinally extending groove (5), wherein an end region of the first skin (3) and an end region of the second skin (4) are arranged in the groove (5), characterized in that the connection between the first and / or second skin (3, 4) and the holding profile (2) as a welded connection (14, 15) is formed.

A composite part (1) according to claim 1, characterized in that the groove (5) is bounded by two side walls (6, 8) and a bottom (7), the side walls (6, 8) being connected to an open side of the Groove (5) a first and a second wing (12, 13) connect, extending in a direction substantially orthogonal to the longitudinal direction of the groove (5) away.

Composite part (1) according to claim 2, characterized in that the first wing (12) with the first skin (3) and / or the second wing (13) with the second skin (4) is welded.

Composite part (1) according to one of the preceding claims, characterized in that the holding profile (2) at least partially consists of a material which has a lower melting temperature than a melting temperature and / or decomposition temperature of the first and / or second skin (3, 4).

Composite part (1) according to one of the preceding claims, characterized in that the first and / or the second skin (3, 4) on the back side a coating (19) has, which has a lower melting temperature than the melting temperature and / or decomposition temperature of the first and / or second skin (3, 4).

Composite part (1) according to one of the preceding claims, characterized in that adjoining the groove (5) side facing away from the bottom (7), a pin (21), preferably with at least one armature (22) adjoins.

Composite part (1) according to one of the preceding claims, characterized in that the first and second wings (12, 13) have a wing thickness between 0.05 mm and 1 mm, preferably between 0.2 mm and 0.6 mm and the wall thickness of the first or second wing (12, 13) is preferably substantially constant.

Composite part (1) according to one of the preceding claims, characterized in that the first and second skin (3, 4) are connected at their end portions by at least one seam (11), wherein the seam (11) is preferably arranged extending in the longitudinal direction.

Composite part (1) according to claim 8, characterized in that the retaining profile (2) extends over an entire length of the first and second skin (3, 4) connecting seam (11).

10. composite part (1) according to any one of the preceding claims, characterized in that the composite part (1) comprises a Umbugbereich in which a height of the holding profile (2) is reduced.

11. composite part (1) according to claim 10, characterized in that the Umbugbereich is arranged in an edge region of the holding profile (2).

12. composite part (1) according to claim 10 or 11 with direct or indirect reference back to claim 6, characterized in that the height of the holding profile (2) is reduced in the Umbugbereich by separating or shortening of the pin (21).

13. composite part (1) according to any one of the preceding claims, characterized in that a carrier (23) with a recess (24) is included, wherein the holding profile (2) is introduced into the recess (24).

14 composite part (1) according to claim 13, characterized in that the recess (24) of the carrier (23) is formed such that the at least one wing (12, 13) outside the recess (24) on the surface of the carrier ( 23) rests.

15. A composite part (1) according to claim 13 or 14 when directly or indirectly dependent on claim 10, characterized in that the recess (24) comprises a support groove, wherein preferably the support groove (29) at an in

Umbugbereich lying end in a notch (30) of the carrier (23) opens and wherein the holding profile (2) in the fold region (10) preferably from the front and / or back of the carrier (23) protrudes into the notch (30)

Composite part (1) according to one of claims 10 to 15, characterized by a bendability in the fold region by at least 30 °, preferably at least 45 °, more preferably at least 60 ° and further preferably at least 90 ° and / or up to 180 °.