DE202010016550U1 - Composite part with welded connection - Google Patents

Abstract

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.

Description

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 from the document WO 2010/105855 known. 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 unnecessary. 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 simple if the holding profile has a groove which is delimited by two side walls and a bottom, with the first and second wings adjoining the side walls at an open side of the groove, which extend in a direction to the longitudinal direction Extends substantially orthogonal 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 each 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. Further, the wings preferably each have a thickness (i.e., height direction extension) that 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 which has a lower melting temperature than a melting temperature of the skins. If the skins are made of a non-thermoplastic, elastomeric or thermoset material, ie 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 skins , Particularly preferably, the holding profile may even comprise a material that has a lower melting temperature than a Vicat softening temperature (after DIN EN ISO 306 ) owns 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 hides is achieved by the preferred low melting temperature of the material from which the retaining profile is at least partially, that when welding the retaining profile with the back of the hides no visible material change on the visible side of the hides 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, may be used as the 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 particularly reliable positioning of the retaining 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 arranged completely within the groove of the profile, i. H. 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. As a result, the reliability of the positioning is improved by the holding profile over the entire length of the seam.

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, a reliable adjustment of the seam over its entire length is also made possible for composite parts with folding.

In a preferred embodiment, the Umbugbereich is 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 bottom 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 above-mentioned seam connecting the skins preferably runs through the entire fold region or at least through the predominant part of the fold region. A residual height of the retaining 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 is meant that a width of the Trägerernutgrabens at the bottom thereof is greater than a 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. Then, if the pin, possibly with the anchor, pressed into the support groove, creates a Hintergreifung, which makes it difficult to pull out the holding profile in the direction of the open side of the groove. The resulting connection can also be referred to as a positive connection, as a toothing, blocking, or as a lock.

However, embodiments are also possible in which the carrier groove has a carrier width which is constant over the height. In these embodiments, the pin and / or the anchor are preferably formed so that a pressure arises between the anchor or pin and the Trägerernutgraben 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 a lying in the Umbugbereich end in a notch of 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 the holding profile can protrude into the notch from the front side of the carrier as in the region of the carrier groove, wherein the holding profile with the hides is bent around an edge of the carrier arranged at the end of the notch and with the, preferably by substantially 180 °, bent part projecting from the back of the carrier into 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. By this it is meant that the retaining profile is tilted about a longitudinally extending axis relative to an installation position in which the side walls of the groove (i.e., the opening direction of the groove) are 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 is arranged in the lower material instead of in the carrier and is referred to as positioning groove), the pin, the formation and arrangement of the / anchor (s), the seam connecting the skins, the end portions, the connection of the holding profile with the recess, the materials of the holding profile and the first and the second skin and the carrier may consist of the already mentioned document WO 2010/105855 taken to the extent that it forms part of the disclosure of the present application. Likewise, this document further details of the method for producing a composite part, in particular with respect to the joining of the first and the second skin or their end portions can be removed together. 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. Show it:

1 a first embodiment of a composite part according to the invention,

2 a detail of the composite part 1 .

3 the composite part 1 together with a carrier,

4 a perspective view of the carrier 3 from a perspective from above,

5 a perspective view of the carrier 3 from a perspective of diagonally below and

6 a longitudinal section along the groove of the composite part 3 ,

A preferred embodiment of a composite part 1 is in 1 shown. The composite part 1 includes a holding profile 2 , a first skin 3 and a second skin 4 , The holding profile 2 has a groove extending in the longitudinal direction, ie in the direction orthogonal to the plane of the drawing 5 on, passing through a first sidewall 6 , a floor 7 and a second side wall 8th is limited. The Haute 3 and 4 have end sections 9 and 10 on that in the groove 5 of the holding profile 2 are arranged. The end sections of the skins 9 and 10 are through a seam 11 connected together, with the seam 11 preferably before the introduction of the end sections 9 and 10 was generated in the groove.

Furthermore, the holding profile 2 a left wing 12 and a right wing 13 on, referring to the first sidewall 6 or second side wall 8th 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 in this case run in a direction substantially orthogonal to the longitudinal direction. Furthermore, the wings run 12 in a substantially to the side walls 6 and 8th orthogonal direction.

The wings 12 and 13 are with the skins 3 and 4 through welded joints 14 and 15 connected. The welded joints can be made, for example, by heating the retaining profile with the already introduced skins by hot air until the wings 12 and 13 to the backs 16 respectively. 17 the skins 3 respectively. 4 are melted. The one by the circle 18 bounded area of the composite part 1 is in 2 shown as a detailed view.

In 2 it can be seen that in the area where the wing 12 to the skin 3 is welded, a coating 19 on the back 16 of the skin 3 is applied. A particularly good adhesion between the wing 12 and the skin 3 can be achieved when the coating 19 made of polyamide. It is also a stable formation of the welded joint 14 conducive to the wing 12 of thermoplastic polyethylene or other thermoplastic elastomer, for example a thermoplastic copolyester. The skins 3 4 For example, they may be made of PVC or polyurethane. The melting point of the wing 12 is preferably lower than the melting point and the decomposition temperature of the skin 3 , The decomposition temperature is understood to be the temperature at which the material from which the skin is chemically decomposed. This makes it possible for a welded connection to be formed by hot air without any changes in the skin 3 occur. This will adversely affect the appearance of the skin 3 avoided by welding. Furthermore, it is advantageous if the Vicat softening temperature (after DIN EN ISO 306 ) of the grand piano 12 lower than the Vicat softening temperature of the skin 3 is. This also prevents a change in the skin 3 during welding. Even more preferred is even the melting temperature of the blade 12 lower than the Vicat softening temperature of the skin 3 , This is a melting of the top of the wing 12 for the purpose of forming the welded joint 14 possible, with this not the risk of deformation of the skin 3 occurs.

It is likewise advantageous, although the coating 19 a lower melting temperature and / or a lower Vicat softening temperature than the skin 3 having. Also for the coating 19 it is advantageous if a melting temperature of the coating 19 less than a Vicat softening temperature of the skin 3 ,

In 2 is still recognizable that outside the area in which the wing 12 with the skin 3 connected, an adhesive layer 20 on the back 16 of the skin 3 is applied. In an alternative embodiment, the coating is 19 on the entire back of the skin 3 applied. In these embodiments, the adhesive layer is 20 preferably outside the area where the wing 12 with the skin 3 connected to one of the skin 3 opposite back of the coating 19 applied. In the same way as in the detail view of the 2 for the connection 14 between the left wing 12 and the skin 3 can also show the connection 15 between the wing 13 and the skin 4 be educated.

As continues in 1 to the groove 5 and the two wings 12 and 13 the retaining profile comprises a pin 21 that attaches to the bottom of the floor 7 followed. 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.

In 3 is the composite part 1 out 1 supplemented by a carrier 23 shown. The carrier 23 has a recess 24 on, in which the holding profile 2 is introduced. The anchors 22 practice 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 has the in 3 shown composite part a soft area 25 on, next to the wing 13 is arranged. The soft area 25 may for example consist of a foamed material or a knitted fabric. Through the soft area 25 the feel of the composite part is changed in this area.

The carrier 23 has in this embodiment, a curved top, wherein the wings 12 and 13 of the holding profile 2 follow the course of the top of the carrier and thus are curved as well. Also an angle between the side walls 6 and 8th the groove 5 and the wings 12 and 13 deviates slightly from 90 °.

The carrier 23 of in 3 shown composite part is in the 4 and 5 shown in perspective. The 4 shows a perspective view of obliquely above, while in 5 a representation from below is shown. The relative perspective of 4 and 5 each other can be based on the visible in both figures front inner surface 26 , Front edge 27 and carrier groove front 28 comprehend.

In the 4 and 5 It can be seen that the recess of a carrier groove 29 having a substantially constant cross-section over its length, and a notch 30 in the front area of the carrier 23 is arranged, composed. The carrier groove 29 has a carrier groove bottom and is thus closed at the bottom. The notch 30 however, as is especially good in 5 can be seen, also open at the bottom. In addition to the carrier groove 29 and the notch 30 instructs the wearer 23 wells 31 and 32 on, standing next to the carrier groove 29 extend in the longitudinal direction. The wells 31 and 32 serve the wings 12 and 13 of the composite part 1 submerged, leaving a top of the wings 12 and 13 without height offset in the surrounding surface of the carrier 23 passes.

Will now be a composite part 1 , as in 1 shown with the holding profile 2 in the recess 24 introduced, the holding profile 2 with the skins 3 and 4 around the front edge 27 of the carrier 23 to be bent. Due to the notch 30 is a Umzuschgen by 180 ° possible. The retaining profile extends from both above and with the bent part from below into the notch. In the area of the Umbugs is the pin 21 of the holding profile 2 shortened or severed, preferably at least one, preferably all, anchors 22 also separated. As a result, a flexibility of the holding profile 2 increased in the area of Umbugs. More specific details regarding the formation of the umbug, the carrier, the carrier groove and the notch of the carrier are the German patent application with the file number 10 2010 045 719.1 in this context, which forms part of the disclosure of the present application.

A cross section through the carrier 23 along the middle of the recess 24 in the longitudinal direction after the composite part 1 out 1 in the recess 24 is positioned in 6 shown. In this view are the sidewall 8th of the holding profile 2 , the skin 4 , the groove bottom 6 and the pin 21 to recognize. The pin 21 (hatched in the drawing) is from a cutting edge 33 separated. The widened terminal area 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 could not be seen, it was drawn for clarity. It can also be seen that outside the region of the umbung the carrier has a carrier groove bottom 34 having. In the area of the Umbugs, however, the carrier points 23 the notch 30 on, leaving the widened part 35 of the holding profile 2 from the back of the notch can protrude into the same.

In the illustrated embodiment, the support is preferably made of polypropylene, glass fiber reinforced polypropylene or a natural fiber material. However, in alternative embodiments, instead of a carrier with a recess, a soft sub-material may be provided with a recess. This in turn can be positioned on a support. The positioning of the retaining profile in a recess of a soft lower material is more accurate in the German patent application with the file number 10 2010 045 729.9 wherein any features relating to the formation of the sub-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 the document WO 2010/105855 Modified in that instead of a seam between the wings and the skins welded joints are provided, be part of the present disclosure. Likewise, all embodiments of the aforementioned applications with the file number 10 2010 045 719.1 and 10 2010 045 729.9 , each modified so that instead of a seam or seams between the wings and the skins corresponding welds are provided, are considered part of the disclosure.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2010/105855 [0002, 0026, 0048]
• DE 102010045719 [0045, 0048]
• DE 102010045729 [0047, 0048]

Cited non-patent literature

• DIN EN ISO 306 [0007]
• DIN EN ISO 306 [0037]

Claims (16)

Composite part ( 1 ) with a first skin ( 3 ), a second skin ( 4 ) and a holding profile ( 2 ) associated with the first and second skin ( 3 . 4 ), wherein the retaining profile ( 2 ) a groove extending in a longitudinal direction ( 5 ), wherein an end region of the first skin ( 3 ) and an end region of the second skin ( 4 ) 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 trained. Composite part ( 1 ) according to claim 1, characterized in that the groove ( 5 ) by two side walls ( 6 . 8th ) and a floor ( 7 ) is limited, wherein on the side walls ( 6 . 8th ) on an open side of the groove ( 5 ) a first and a second wing ( 12 . 13 ) 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 retaining profile ( 2 ) is at least partially made of a material which has a lower melting temperature than a melting temperature and / or decomposition temperature of the first and / or the 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 ) a coating on the back ( 19 ) having 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 any one of the preceding claims, characterized in that to the groove ( 5 ) facing away from the ground ( 7 ) a pin ( 21 ), preferably with at least one anchor ( 22 ), connects. Composite part ( 1 ) according to one of the preceding claims, characterized in that the first and second wings ( 12 . 13 ) has 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 ) at their end sections through 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 ) over an entire length of the first and second skin ( 3 . 4 ) connecting seam ( 11 ). Composite part ( 1 ) according to 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. Composite part ( 1 ) according to claim 10, characterized in that the Umbugbereich in an edge region of the holding profile ( 2 ) is arranged. Composite part ( 1 ) according to claim 10 or 11 when directly or indirectly related to claim 6, characterized in that the height of the holding profile ( 2 ) in the Umbugbereich by separating or shortening the pin ( 21 ) is reduced. Composite part ( 1 ) according to one of the preceding claims, characterized in that a carrier ( 23 ) with a recess ( 24 ), wherein the retaining profile ( 2 ) in the recess ( 24 ) is introduced. 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. Composite part ( 1 ) according to claim 13 or 14 with direct or indirect reference back to claim 10, characterized in that the recess ( 24 ) comprises a carrier groove, wherein preferably the carrier groove ( 29 ) at an end lying in the Umbugbereich in a notch ( 30 ) of the carrier ( 23 ) and wherein the retaining profile ( 2 ) in the turnaround area ( 10 ) preferably from the front and / or back of the carrier ( 23 ) into the notch ( 30 ) protrudes. Composite part ( 1 ) according to one of claims 10 to 15, characterized by a flexibility in the Umbugbereich by at least 30 °, preferably at least 45 °, more preferably at least 60 ° and further preferably at least 90 ° and / or up to 180 °.

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