WO2015177214A1

WO2015177214A1 - Method for equipping a multi-layered moulded body with an ornamental seam

Info

Publication number: WO2015177214A1
Application number: PCT/EP2015/061117
Authority: WO
Inventors: Peter Cempulik
Original assignee: Johnson Controls Interiors Management Gmbh
Priority date: 2014-05-20
Filing date: 2015-05-20
Publication date: 2015-11-26
Also published as: DE102014107108A1

Abstract

The invention relates to a method for equipping a multi-layered moulded body (100) with an ornamental seam (110) and to a multi-layered moulded body (100). The moulded body (100) has at least one core part (10) and a cover part (20). In order to achieve the aim of being able to simplify and to implement the ornamental seam (110) in a cost-effective manner, according to the invention the effective region (55) of a tool (50) is introduced at least partially into the cover part (20) or through the cover part (20) into the core part (10), wherein a seam region (31) of the yarn material (30) is arranged in the effective region (55). The effective region (55) of the tool (50) is then removed from the moulded body (100) such that the seam region (31) remains in the cover part (20) and/or in the core part (10) and finally activates a connection between the cover part (20) and/or the core part (10) and the seam region (31) such that a maintaining of position of the seam region (31) in the core part (10) is ensured.

Description

PROCESS FOR EQUIPPING ONE

MULTILAYER FORM BODY WITH A DECORATION

description

The present invention relates to a method of providing a multilayer molded article having a decorative seam. In addition, the present invention relates to a multilayer molded body, which can be equipped by the inventive method with a decorative seam.

In addition to the design of a vehicle body, which usually falls first in the eye of the beholder, the design of the vehicle interior is an essential factor of modern vehicle development. Here, not only the appearance of the individual elements is emphasized; on the contrary, the feel and the interaction between material, shape and colors of the interior decoration play a decisive role. High-quality vehicle interiors convince above all by their design and first-class processed materials.

In interior fitting parts, it is therefore customary to build up shaped bodies from a mostly foamed core part and a coating part, wherein the core part can be produced in a desired shape and provides the necessary mechanical stability of the shaped body, whereas the coating part, also referred to as skin, has a visual and haptic effect to give a high-quality impression. In addition to genuine leather as such a coating material, artificial leather surfaces are also used in such shaped bodies. These provide manufacturing technology has the advantage that a core part for a molding to be formed usually provided in a simpler way with such a plastic coating part can be, than would be the case with a genuine leather cover. Coating parts made of genuine leather, which represents only a limited extent arbitrarily processable natural material, are characterized by corresponding seams of the individual connected sections of the respective coating part, which is quite desirable by a quality-conscious consumer.

Also in the case of covering parts made of a plastic such as artificial leather, it is provided in conventional moldings of a core part and a coating part for forming such a then serving only the ornament, this before introducing the foam, which forms the core part after curing, in the coating part train.

However, this results in the problem that the coating part is perforated during the formation of such a seam, which makes a seal of the seam erforder- lent, so that the foamed plastic material of the core member does not penetrate through the seams of the reference material during the subsequent foaming. However, such a sealing of the seams of the coating part is a method with a particularly high workload, which makes the handling complicated and also only partially automated.

On the basis of the stated problem, the present invention has for its object to provide a method for providing a multi-layered molded body with a decorative seam, in which the production over the conventional solutions known from the prior art is simplified and is less expensive to carry out.

The object is achieved by a method for equipping a multilayer molded body with a decorative seam, wherein the molded body has at least one core part and a coating part, the method comprising the method step of at least partially introducing the effective range of a tool into the coating part or through the coating part into the core part, wherein a seam region of the yarn material is arranged in the effective region, the process step of dispensing the effective region of the tool from the Shaped body such that the seam region remains in the coating part and / or in the core part and the method step of activating a connection between the coating part and / or the core part and the seam region, so that a position holding the seam region is ensured in the core part has.

More specifically, the method provides that a molded article is provided which has at least a core part and a coating part. Such a coating part, so for example, a synthetic leather skin or the like, this case was backfoamed in a mold with a plastic, wherein the coating part was not provided before this foaming me a seam or the like, which could affect the tightness properties for the foaming. After curing of the foam, which forms the core part, therefore, there is first a molded body with a solid connection between the core part and the coating part, which although the desired Oberflächeneigen- shafts of the coating part, but is not yet provided with a seam at this time.

In the method according to the invention, provision is now made for an active region of a tool to be introduced at least partially into the coating part or through the coating part into the core part. At this effective range of the tool is a yarn material, usually a thread, arranged with the desired color for the seam. More specifically, a seam portion of the yarn material is disposed in the knitting area, i. H. a region of the yarn which, after this introduction, is to remain in the coating part and / or the core part, and therefore is not part of the visible decorative seam.

Subsequently, the effective range of the tool is discharged from the molded body, for example pulled out, in such a way that the seam area remains in the coating part and / or in the core part.

After this application of the tool, a connection between the coating part and / or the core part and the seam area is activated. This ensures that the seam area is held in position in the core part, at least in the face of limited mechanical tensile loads on the outer part of the decorative seam, ie in relation to tensile loads on the part of the gamma- terials, which runs along the decorative seam on the surface of the coating part along.

Such a tensile load may for example occur when mounting the molding in the vehicle or later in the use of the molding, for example, when the molding is a leatherette seat or the like and a user uses this imitation leather seat normally.

The inventive method is characterized in particular by the fact that no seams prior to the foaming process of the core part are present, which would have to be sealed, but still a shaped body is obtained, which is optically and haptically advantageous equipped with a decorative seam. By the method according to the invention, in particular, an automatic introduction of the seam is possible, wherein in addition advantageously the color of the seam, the stitch width, the contour of the seam and the like can be freely selected, which increases the flexibility.

This results in "real" seams on a plastic skin, which is optically advantageous.The complete automation of the process does not require any elaborate manual work, in particular no seam sealing or the like, since the seam is introduced only after foaming.

Advantageous developments of the method according to the invention are specified in the dependent claims.

According to a further aspect of the invention, prior to the at least partial introduction of the effective region of the tool into the coating part or through the coating part into the core part, a preparation tool, more precisely an effective area of the preparation tool, is introduced into the coating part or through the coating part into the core part becomes . As a result, at least one hole is formed in the coating part and / or in the core part.

As a result, a hole is already created in the coating part or in the core part before the actual process of dispensing the yarn material, which simplifies the dispensing of the yarn material. According to a further aspect of the invention, it is provided that after the formation of the hole through the effective region of the preparation tool but before the introduction of the effective range of the tool in the coating part or through the coating part into the core part, an adhesive is introduced into the hole. The adhesive may preferably be a hot melt adhesive or more preferably a thermally activatable hot melt adhesive.

In this case, the yarn material can be easily fixed in the hole, since an adhesive is already provided in the hole. In particular, a commercial yarn may be used which need not be otherwise treated or must have special properties.

According to all further aspect of the invention, it is provided that an adhesive is introduced into a hole previously formed by the tool before the effective area of the tool is brought out of the molded body.

In this case, no additional preparation tool is used, but the tool itself, or the effective range of the tool, generates at least one hole in the coating part or the core part. Following this, an adhesive, preferably a hotmelt adhesive and more preferably a thermally activatable hotmelt adhesive, is introduced into the hole and subsequently the effective area of the tool is removed from the molding such that the seam area remains in the cladding part or in the core part. As a result, a normal, commercial yarn can be used again, and one and the same tool can be used to make the hole and to dispense the yarn.

According to a further aspect of the invention it is provided that the Garnmate- rial contains a thermally activatable connection portion.

In particular, such a thermally activatable connection portion is a thermally activatable fusion adhesive ("hotmelt") .The activation of the connection between the core portion and the seam portion occurs in the case where a thermally activatable hot melt adhesive is used by heating, at least the core portion. In general, a heating of the entire molded body will be provided. However, it is also conceivable to provide a selective heating, for example by means of microwaves.

In this case, the yarn material used for the ornamental seam to be formed virtually brings with it the means necessary for a secure and stable connection of the decorative seam to the molding, i. E. H. no complicated introduction of a suitable bonding agent in a further mechanical processing step is necessary.

It may be provided that the thermally activated hot melt adhesive is a non-reactive, color UV-stable hot melt adhesive. Due to the UV resistance, the appearance of the trained decorative seam is not affected even then, for example by unwanted discoloration of the

Hot melt adhesive when the multilayer molded body is exposed to the sun for a long time. By using a non-reactive hotmelt adhesive, compatibility with various core materials is provided.

Just as well, it can also be provided that the thermally activatable adhesive is a reactive, UV-stable colored hot melt adhesive. By means of a reactive hotmelt adhesive, the stability of the connection between the seam area and the covering part and / or core part can be improved with a suitable material.

Equally, it is also conceivable that in a specific way the thermal activatable connection portion is present as a coating on the cooking material. Producing such a coated cooking material is particularly simple, which reduces costs.

Alternatively or additionally, however, it can also be provided that the thermally activatable connection portion is woven as fiber into the yarn material. As a result, a particularly uniform distribution of the thermally activatable connection portion in the yarn material is possible. In all the cases mentioned, when the entire molding is completely heated, a connection of the hot-melt adhesive is achieved at least with the coating part, preferably also with the core material. The introduced yarn thus combines with the coating part and preferably also with the foam of the core body, which increases the stability of the decorative seam thus produced.

Alternatively or additionally, however, it can also be provided that the activation of the connection between the coating part and / or the core part and the seam region comprises the introduction of an adhesive into the coating part and / or the core part and a subsequent at least partial curing of the adhesive. In other words, it is conceivable that an adhesive is injected into the coating part and / or the foam of the core part, usually before the yarn is introduced into the core part by means of the tool. In this case, the holes required for introducing the seam region of the yarn material into the core part were formed in a separate working step, for example by pre-punching, preferably by means of the preparation tool.

In particular, however, if the yarn material itself has the means necessary for producing the connection, as described above, it can also be advantageously provided that the at least partial introduction of the effective region of the tool has a piercing or piercing of the coating part. In other words, in this case, the holes necessary for introducing the yarn material into the coating part and / or the core part are not produced in a separate process step, but together with the process step of introduction. This can improve the efficiency of the process.

According to a further aspect of the solution according to the invention, it is provided that the method steps of at least partially introducing the effective range of a tool into the coating part or through the coating part into the core part, wherein in the effective area a seam region of the core material is arranged, and the dispensing the effective range of the tool from the shaped body such that the seam area remains in the coating part and / or in the core part, are carried out repeatedly. Herein, before each repetition, the tool is repositioned with respect to the molding so that a continuous seam is formed. In other words, as a rule, the plant by a predetermined or predefinable step (Nahtweit) along a trajectory on the molding transported forward. In this case, a continuous seam is to be understood as meaning a decorative seam in which sewing points follow one another, wherein the yarn material is not separated. In other words, the result is a seam that can not be visually distinguished from a "true" seam of the coating part.

According to a further aspect of the invention, it is provided that the tool is a darning needle which has a color guide in its effective area and a thread exit channel which is open in the stinging direction. In a particularly advantageous manner, it can be provided in this case that the yarn outlet channel runs at an acute angle to the stitching direction. In such a hook-like design of the effective range of the needle, it is possible to introduce the yarn material with the seam region deep into the foam material of the core part. When pulling out the needle, the thread then remains in the foam, because it is stripped by the foam of the core material and the skin of the coating part of the needle during withdrawal. After the needle is then offset by one stitch, the thread is automatically stuffed into the next hole created by the fabric needle. The result is an optically produced seam with the Garnmate- material.

The object is also achieved by a multilayer molded body, in particular an interior trim part for a vehicle, which has at least a core part and a coating part. In this case, a yarn material is arranged in a seam region, which extends through the coating part into the core part, wherein the yarn material in the seam region is connected to the core part and preferably to the coating part.

Alternatively, a multilayer molded body only has at least one coating part, and in a seam area, a yarn material reaches into the coating part, wherein the yarn material in the seam area is connected to the coating part.

The connection between the yarn material in the seam region and the coating part and / or the core part in the multilayer molded body is ensured by an adhesive. The adhesive is preferably a hot melt adhesive or more preferably a thermally activatable hot melt adhesive. On the other hand, the yarn material may contain a thermally activatable compound portion, in particular a thermally activatable hot melt adhesive, in which case the connection between the yarn material in the seam region and the coating part and / or the core part in the multilayer molded body is ensured by heating.

The yarn material is coated with the thermally activatable connection portion or else the thermally activatable connection portion is woven into the yarn material prior to heating.

The thermally activatable hotmelt adhesive is preferably a reactive or non-reactive color-fast UV-stable hotmelt adhesive. The method according to the invention for equipping a multilayer molded body with a decorative seam and the multilayer molded body will be explained in more detail below with reference to an exemplary embodiment of the invention shown in the figures. Show it :

FIG. 1a is a schematic sectional view through a shaped article partially equipped with a decorative seam and a schematic representation of the method according to the invention according to an embodiment of the invention;

FIG. 1 b is a schematic sectional view through a shaped article partially equipped with a decorative seam and a schematic illustration of the method according to the invention in accordance with a further embodiment of the invention; and

FIG. 2a and 2b: schematic representations of specific configurations of darning needles for carrying out the method according to the invention according to the embodiment. In FIG. 1 is a schematic sectional view of a partial section of a multilayer molded body 100, which was formed by foaming a covering part 20 made of a plastic material with a foam material, the hardened foam material forming a core part 10. The foam material here is for example PUR foam, and the coating part 20 is provided with a structured, leather-like surface.

In FIG. 1, a partially formed decorative seam 110 is shown, with individual segments of applied yarn material 30 running along the line on the surface of the cover member 20 and into the hardened foam in uniformly spaced holes 21 with a succession of seam portions 31 through the cover member 20 Core part 10 are introduced.

In FIG. 2, the case is that the holes 21 do not extend through the coating part 20 into the core part 10, but pass through the holes 21 only partially through the coating part 20.

The yarn material in the exemplary embodiment shown is a colored yarn material whose color differs from the surface color of the covering part 20 in order to form an optically clearly visible decorative seam.

The yarn material 30 can also be coated with a thermally activatable adhesive ("hotmelt"), which is reactive or non-reactive, but color-stable UV-stable In addition, the same thermally activatable adhesive is woven as a fiber into the yarn material 30.

Alternatively, the yarn material 30 may not be coated with the thermally activatable adhesive. In this case, the adhesive is introduced into the holes 21 independently of the yarn material 30, and only then is the yarn introduced into the holes 21.

In FIG. 1, a tool 50 designed according to the exemplary embodiment as a darning needle, which is explained in more detail below with reference to FIGS. 2 a and 2 b, is shown on the left next to the already partially formed decorative seam 110. In a yarn guide 56, the yarn material 30 is threaded so that it when driving the darning needle, d. H. of the tool 50, in the Next formed next and dot-dashed next hole 21 along the step width of the decorative seam 110 in the overdrawing and / or deep into the foam material of the core member 10 is introduced and remains on withdrawal of the darning needle with a seam portion 31 in this channel thus formed. After such expelling (pulling) of the darning needle from the molded body 100, the darning needle is then in the direction of the embodiment shown in FIG. 1 linearly to be formed decorative seam 110 positioned at a uniform step distance above the next hole to be formed 21 and again driven at this point in the multilayer molded body 100.

After the yarn material, following such a repeated partial introduction of the tool 50 with its effective area 55 and subsequent application of the tool such that the seam area 31 remains in the overstretch part and / or in the core part 10, then the setting of the seam is completed , By a subsequent thermal activation of the surface of the coating part and / or the core material and in this preferably woven "hot melt" then an adhesive bond (adhesive bond) between the overdraft part and / or the core part 10 and the seam portion 31 is formed is a position holding the seam portion 31 in the overdrawing and / or in the core member 10 guaranteed to the extent that the thus formed decorative seam 110 can be loaded on train, that is stable to limited mechanical tensile loads with respect to their position on the molded body 100th der Since preferably the entire Garnstoff 30 is provided with the thermally activated adhesive and heating of the entire molded body 100 is carried out in the embodiment, the yarn material also connects to the surface of the cover member 20, so that a particularly stable decorative seam 110 is obtained.

The in FIG. 2, the preparation tool 50a may be any tool capable of producing a suitable hole 21 or holes 21 for preparing the insertion of the yarn. It is provided that an effective region 55a of the preparation tool 50a is formed such that holes 21 can be formed by means of the effective region 55a. As shown in FIG. 2a, a threading tool which is formed at an acute angle to the puncturing direction is provided on the tool 50 designed as a stop needle. Outlet channel 57 is provided, which ends in a thread guide 56. In this way, a particularly simple automatable stuffing of the yarn material 30 is possible, wherein the thread reliably remains in the coating part and / or foam material of the core part 10 when the darning needle is pulled out again, because the yarn material 30 through the coating part and / or the foam of the core part 10 and / or the skin of the cover part 20 is stripped off the needle.

However, it is equally possible to provide the darning needle (the tool 50) with a substantially serrated thread exit channel 57, as shown in FIG. 2b is shown.

The present invention is not limited to the exemplary embodiments shown in the figures, but results from a synopsis of all the features disclosed herein.

LIST OF REFERENCE NUMBERS

10 core part

20 coating part

21 holes

30 yarn material

31 seam area

35 adhesive

50 tool

55a preparation tool

55 Effective range of the tool

55a effective range of the preparation tool

56 thread guide

57 thread exit channel

100 multilayer molded body

110 decorative stitching

Claims

claims

A method of providing a multilayer molded article (100),

in particular an interior trim part for a vehicle, having a decorative seam (110), wherein the molded body (100) has at least one core part (10) and a covering part (20), the method comprising the following method steps:

a) at least partially introducing the effective region (55) of a tool (50) into the coating part (20) or through the coating part (20) into the core part (10), wherein in the active region (55) a seam region (31) of the yarn material (30) is arranged;

b) applying the effective range (55) of the tool (50) from the

Shaped body (100) such that the seam area (31) remains in the covering part (20) and / or in the core part (10); and

c) activating a connection between the coating part (20) and / or the core part (10) and the seam region (31) so that position retention of the seam region (31) in the coating part (20) and / or core part (10) is ensured.

2. The method of claim 1, wherein prior to step a) the following method step is provided:

aO) at least partially introducing the effective region (55a) of a

Preparation tool (50 a) in the coating part (20) or through the coating member (20) into the core part (10) such that at least one Hole (21) in the coating part (20) and / or the core part (10) is formed.

3. The method according to claim 2, wherein between method step aO) and a) the following method step is provided:

al) introducing an adhesive, preferably a hot melt adhesive, more preferably a thermally activated hot melt adhesive in the at least one hole (21).

4. The method of claim 1, wherein in step b) before the

Applying the effective range (55) of the tool (50) from the

Shaped body (100) an adhesive, preferably a hot melt adhesive, more preferably a thermally activated hot melt adhesive in at least one in step a) formed hole (21) is introduced.

5. The method of claim 1 or 4, wherein the yarn material (30) has a thermally activatable connection portion, in particular a thermally activated hot melt adhesive (35), and wherein the activation of the connection between the core part (10) and the seam area (31) by heating at least the core part takes place.

6. The method according to any one of claims 3 to 5, wherein the thermally

Activatable hot melt adhesive (35) is a reactive or a non-reactive, color UV-stable hot melt adhesive.

7. The method according to claim 5 or 6, wherein the thermally activatable

Connecting portion at least before activating the compound is present as a coating on the yarn material (30) or as a fiber in the yarn material (30) is woven.

8. The method according to any one of the preceding claims, wherein the

Activating the connection between the coating part and / or the core part (10) and the seam region (31), the introduction of an adhesive (35) in the coating part and / or the core part (10) and a subsequent at least partial curing of the adhesive (35) ,

9. The method according to any one of the preceding claims, wherein the at least partially introducing the active region (55) of the tool (50) has a piercing and / or piercing of the coating part (20).

10. The method according to any one of the preceding claims, wherein the

Method steps a) and b) are carried out repeatedly, wherein before each repetition, the tool (50) is repositioned with respect to the shaped body (100), so that a continuous seam (110) is formed.

11. The method according to any one of the preceding claims, wherein the

Tool (50) is a darning needle, which in its effective areas (55) has a thread guide (56) and an open in the stiching thread exit channel (57).

12. The method according to any one of the preceding claims, wherein the yarn outlet channel (57) extends at an acute angle to the stitching direction.

13. Multilayer shaped body (100), in particular interior trim part for vehicles, wherein the shaped body (100) has at least one core part (10) and a covering part (20),

characterized in that the shaped body is provided by a method according to one of claims 1 to 12 with a decorative seam (110).

14. Multilayer molding (100), in particular one

Interior fitting for a vehicle having at least:

A core part (10); and

A coating part (20),

wherein in a seam region (31) a yarn material (30) is arranged which extends through the coating part (20) into the core part (10), and wherein the yarn material (30) in the seam region (31) with the core part (10) and is preferably connected to the coating part (20).

15. Multilayer molding (100), in particular one

Interior parts for a vehicle, the at least one coating part (20), wherein in a seam region (31) a yarn material (30) is arranged, which extends into the coating part (20), and wherein the yarn material (30) in the seam region (31) is connected to the coating part (20).