DE202023104500U1 - System consisting of a forming tool and auxiliary film for producing a decorative part with a three-dimensionally shaped surface - Google Patents

Abstract

System consisting of a forming tool (40) and auxiliary film (30) for forming an arcuate and non-fluid-tight material, designed to carry out a method for producing a decorative part (10) with a three-dimensionally shaped surface (11) starting from an arcuate and non-fluid-tight material, comprising at least the steps:
a. Cutting the material to a near-net-shape blank (20) or cutting out a near-net-shape blank (20) from the material, the blank (20) extending in a plane;
b. Arranging the blank (20) on a fluid-tight auxiliary film (30) and aligning the blank (20) on the auxiliary film (30),
so that the auxiliary film (30) protrudes in the plane on each side of the blank (20) and the blank (20) runs around in a frame shape with a free section (33);
c. Connecting the auxiliary film (30) with the raw part (20) aligned thereon to form a unit;
d. Arranging the blank (20) connected to the auxiliary film (30) in a mold cavity of a forming tool (40),
wherein the mold cavity is separated in a fluid-tight manner by the auxiliary film (30) into a shaping first part (41) and a second part (42) to be pressurized
and wherein the blank (20) is brought into a predetermined position and position in the first part (41) of the mold cavity by means of the auxiliary film (30), in which the blank (20) is completely arranged in the mold cavity and through the Auxiliary film (30) is fixed;
e. Introducing a fluid into the second part of the mold cavity,
so that the auxiliary film (30) is subjected to pressure on its side (32) facing the second part (42),
the pressurized auxiliary film (30) presses the raw part (20) on its side (31) facing the first part (41) in a shaping manner against a wall (43) of the first part (41), which forms the three-dimensionally shaped surface (11) of the Decorative part (10) corresponds,
and the previously flat blank (20) is formed into a layered body (50) with a shape corresponding to the three-dimensionally shaped surface (11).

Description

The invention relates to a system consisting of a forming tool and auxiliary film for forming a material provided in an arc shape and which is not fluid-tight, in particular not gas-tight, and to a decorative part which can be produced thereby with a three-dimensionally shaped surface.

In vehicles, but also in other applications, decorative parts are used which use originally curved materials such as foils or veneers for a decorative layer that determines the visual appearance.

Since such decorative parts or their visible surface and thus also their decorative layers are often designed three-dimensionally and do not extend in just one plane, the films or veneers must be changed from their initially arcuate, i.e. essentially flat and flat extension into a three-dimensionally deformed or stretched one and be given a geometric shape suitable for the decorative part.

For such forming, high-pressure forming is often used in the prior art, as described, for example, in EP 0 371 425 A2 is known. According to this known method, a sheet-shaped material is inserted into a mold cavity of a forming tool, such as that from DE 41 13 568 C1 is known, clamped and subjected to high pressure from one side using gas or air, so that the material is deformed and pressed against a shaping part of the mold cavity.

In the case of veneers, ie in the case of curved, very thin wood and generally in the case of rigid, porous and/or materials that are prone to cracking, according to the procedure described by the EP 0 371 425 A2 However, the problem with the proposed method and the tools or systems used for this is that the material itself is not, or at least not permanently, gas-tight. Accordingly, when high pressure is applied, the material is not pressed reliably or at least not sufficiently against the shaping part of the mold cavity, so that the material cannot be geometrically formed in the required manner and reliably and can be accidentally damaged.

Hence the Scripture strikes EP 2 322 339 A2 the use of an auxiliary film, which lies loosely on the sheet-shaped material and seals it, so that the high pressure acts on the sheet-shaped material via the auxiliary film. To position the sheet-shaped material in the mold cavity, it is clamped between tool halves of the forming tool, with predetermined breaking points and/or shrinkage zones being provided by cuts in the sheet-shaped material, through which the sheet-shaped material can deform as intended despite being fixed by the tool halves in the mold cavity .

However, such a method and a system provided for this have the disadvantage that the raw parts, which have to be provided from the sheet-shaped material or material for forming, are comparatively large, since these are used to fix the raw parts in the mold cavity must extend. Another disadvantage is that the raw part made of the arcuate material that is potentially prone to cracking must be arranged running along sealing surfaces of the forming tool, so that sealing the mold cavity is made more difficult.

These disadvantages lead, on the one hand, to a waste of material and, on the other hand, to the need for a comparatively complex sealing of the mold cavity, which results in higher overall manufacturing costs and increased maintenance effort.

The invention is therefore based on the object of overcoming the aforementioned disadvantages and of providing a system for the cost-effective and simple production of a decorative part with a three-dimensionally shaped surface starting from an arcuate and non-fluid-tight material that is particularly prone to cracking.

This task is achieved by the combination of features according to claim 1.

1. a. Zuschneiden des Materials zu einem endkonturnahen Rohteil oder Ausschneiden eines endkonturnahen Rohteils aus dem Material, wobei das Rohteil sich in einer Ebene erstreckt;

According to the invention, a system consisting of a forming tool and an auxiliary film is therefore proposed, wherein the system is designed to carry out a method for producing a decorative part, the decorative part having a three-dimensionally shaped surface and the method of an arcuate and at least not permanently fluid or not permanently gas-tight material. The material is preferably a porous, rigid and/or crack-prone material, in particular a natural material and in particular wood. The material can be a veneer. When it is arcuate or in the form of a sheet it is also understood that the material is initially present, for example like a sheet of paper, as a thin layer and extends essentially in a flat plane, so that the extent of the material is in the Plane is a multiple of the extent of the material orthogonal to the plane. The method that can be carried out by the system according to the invention includes at least the following steps, which are preferably carried out in the given order:

1. a. Cutting the material to a near-net-shape blank or cutting out a near-net-shape blank from the material, the blank extending in a plane;

• b. Anordnen des Rohteils an einer fluiddichten, insbesondere gasdichten Hilfsfolie und Ausrichten des Rohteils an bzw. zu der Hilfsfolie, sodass die Hilfsfolie in der Ebene zu jeder Seite über das Rohteil hinausragt und das Rohteil mit einem insbesondere von dem Rohteil freien Abschnitt rahmenförmig umläuft;

As an explanation, it should be noted that cutting or cutting out can also be referred to as contouring the material, as the contour of the raw part is given to the material. Near-net-shape is also to be understood in particular as meaning that after the subsequent pressurization of the raw part and the associated forming of the raw part into the laminated body, no or essentially no further cutting or separation of larger quantities of the material is necessary. For example, near-net-shape can be understood as meaning that the area of the raw part is equal to the area of the laminated body in the decorative part or only slightly larger, e.g. B. 1% to 10% or 1% to 5% larger than the area of the laminate in the decorative part.

• b. Arranging the raw part on a fluid-tight, in particular gas-tight, auxiliary film and aligning the raw part on or to the auxiliary film, so that the auxiliary film protrudes in the plane on each side of the raw part and the raw part revolves in a frame shape with a section that is in particular free of the raw part;

• c. Verbinden der Hilfsfolie mit dem daran ausgerichteten Rohteil zu einer Einheit;

To align the raw part with or to the auxiliary film, position marks can be provided on the auxiliary film and, for example, printed or a positioning aid, such as a position gauge, can be used. The auxiliary film itself is a film made of, for example, plastic, which can be designed to be elastically or plastically deformable, but retains fluid or gas tightness when deformed as intended.

• c. Connecting the auxiliary film with the raw part aligned thereon to form a unit;

• d. Anordnen des mit der Hilfsfolie verbundenen Rohteils in einem Formhohlraum eines Umformwerkzeugs, wobei der Formhohlraum durch die Hilfsfolie gas- bzw. fluiddicht in einen formgebenden ersten Teil und in einen mit Druck zu beaufschlagenden zweiten Teil getrennt wird. Weiter wird das Rohteil mittels der Hilfsfolie in dem ersten Teil des Formhohlraum in eine vorbestimmte Position und Lage gebracht, wobei das Rohteil in dieser Position und dieser Lage vollständig in dem Formhohlraum angeordnet und durch die Hilfsfolie fixiert ist;

By connecting the auxiliary film to the blank, for example by means of an adhesive mentioned below, the blank is fixed to the auxiliary film in such a way that pressure acting against the gas or fluid-tight auxiliary film can act on the blank. The raw part itself is therefore still not gas-tight or fluid-tight.

• d. Arranging the raw part connected to the auxiliary film in a mold cavity of a forming tool, the mold cavity being separated in a gas-tight or fluid-tight manner by the auxiliary film into a shaping first part and a second part to be pressurized. Furthermore, the blank is brought into a predetermined position and position in the first part of the mold cavity by means of the auxiliary film, the blank being completely arranged in the mold cavity in this position and position and fixed by the auxiliary film;

• e. Einleiten eines Fluides, insbesondere eines Gases, weiter insbesondere von Luft, in den zweiten Teil des Formhohlraums, sodass die Hilfsfolie an ihrer zu dem zweiten Teil weisenden Seite druckbeaufschlagt wird. Die druck- bzw. hochdruckbeaufschlagte Hilfsfolie presst das Rohteil an ihrer zu dem ersten Teil weisenden Seite formgebend gegen eine Wandung des ersten Teils des Formhohlraums, welche zu der dreidimensional geformten Oberfläche des Dekorteils korrespondiert, wodurch das zuvor ebene Rohteil zu einem Schichtkörper mit einer zu der dreidimensional geformten Oberfläche korrespondierenden Form umgeformt wird.

What is essential here is that the raw part is arranged completely within the mold cavity and in particular does not extend between sealing surfaces of the forming tool - mentioned below. Deviating from this, the auxiliary film can extend between the sealing surfaces and thereby serve integrally as a sealing lip. Further preferably, the raw part is free on all sides in relation to its flat extension in the mold cavity and, at least initially, does not rest directly on the forming tool.

• e. Introducing a fluid, in particular a gas, more particularly air, into the second part of the mold cavity, so that the auxiliary film is pressurized on its side facing the second part. The pressurized or high-pressure auxiliary film presses the raw part on its side facing the first part in a shaping manner against a wall of the first part of the mold cavity, which corresponds to the three-dimensionally shaped surface of the decorative part, whereby the previously flat raw part becomes a laminated body with a to three-dimensionally shaped surface is formed into a shape corresponding to the shape.

In summary, the invention relates to a system designed to carry out a method for producing a decorative part with a three-dimensionally shaped surface starting from an arcuate and non-fluid-tight material. In this case, a near-net-shape raw part is contoured from the sheet-shaped material and this is connected in one piece to a fluid-tight auxiliary film, the unit formed thereby being arranged in a forming tool or its mold cavity in such a way that the blank is completely and freely on its sides in the mold cavity of the forming tool is arranged. The auxiliary film is then pressurized by a fluid on a side facing away from the blank, so that the blank is pressed against a shaping wall of the forming tool and formed into a laminate.

Because a raw part close to the final shape is contoured from the sheet-shaped material before forming, there is no or significantly less waste after forming, which means that compared to the prior art With a given amount of material, more layered bodies or more decorative parts can be produced.

In addition, because the raw part, which like the original material is not fluid or gas-tight, is arranged completely within the mold cavity, the sealing of the tool halves can be done more easily and, as explained below, with the help of the auxiliary film.

This results in resource-saving and cost-effective production.

• f. Entnehmen des Schichtkörpers mit der Hilfsfolie aus dem Umformwerkzeug;
• g. Entfernen der Hilfsfolie und insbesondere der gesamten Hilfsfolie von dem Schichtkörper;
• h. Anordnen des Schichtkörpers in einem Spritzwerkzeug;
• i. Hinterspritzen oder Umspritzen des Schichtkörpers mit einer Trägerschicht zur Stabilisierung und Verstärkung des Schichtkörpers.

An advantageous development of the system also provides that the following steps can be carried out, preferably in the given order:

• f. Removing the laminate with the auxiliary film from the forming tool;
• G. Removing the auxiliary film and in particular the entire auxiliary film from the laminate;
• H. Arranging the laminated body in an injection mold;
• i. Back-injection or overmolding of the laminated body with a carrier layer to stabilize and reinforce the laminated body.

Back-injection is understood to mean that the carrier layer is injected onto the back of the laminated body and does not extend to a visible side of the later decorative part or to a visible side of the laminated body.

Deviating from this, overmolding is understood to mean that the carrier layer is arranged both on the back and at least in sections on the visible side of the laminate and, if necessary, also extends into the laminate to fill cracks.

Depending on the optical appearance to be achieved, the laminated body can be back-injected or encapsulated, for example, with a colorless and preferably transparent and/or translucent plastic.

• f. Entnehmen des Schichtkörpers mit der Hilfsfolie aus dem Umformwerkzeug;
• g. Entfernen des freien Abschnitts der Hilfsfolie und insbesondere ausschließlich des freien Abschnitts von dem Schichtkörper;
• h. Anordnen des Schichtkörpers mit der Hilfsfolie in einem Spritzwerkzeug;
• i. Hinterspritzen oder Umspritzen des Schichtkörpers mit einer Trägerschicht zur Stabilisierung und Verstärkung des Schichtkörpers.

Alternatively, it can be provided that the system is designed to carry out the following steps, preferably in the given order:

• f. Removing the laminate with the auxiliary film from the forming tool;
• G. Removing the free section of the auxiliary film and in particular exclusively the free section from the laminate;
• H. Arranging the laminate with the auxiliary film in an injection mold;
• i. Back-injection or overmolding of the laminated body with a carrier layer to stabilize and reinforce the laminated body.

As before, the back-injection or over-injection can be carried out, for example, with a colorless and preferably transparent and/or translucent plastic.

According to this variant of the system, the auxiliary film, which cannot be reused anyway, remains like a sand wipe between the laminated body and the carrier layer, which can effectively prevent the plastic from penetrating into the laminated body, for example during back-injection.

Furthermore, the auxiliary film can also serve integrally to seal the injection molding tool and/or to separate a visible-side surface of the laminated body from the back, so that no material can unintentionally get onto the visible side during overmolding or back-injection.

In the case of overmolding, it can also be provided, for example, that the carrier layer only surrounds edge regions of the laminated body, so that these are surrounded by the carrier layer and no trimming of the laminated body is necessary, since protrusions on the raw part are provided to increase process reliability, which also correspond accordingly found in the layered body, lie within the carrier layer.

A likewise advantageous development of the system also provides that the forming tool has a first tool half, which determines the first part of the mold cavity, and a second tool half, which determines the second part of the mold cavity. The auxiliary film is placed before step e. and in particular during or in step d. arranged between sealing surfaces provided on the first tool half and the second tool half and pressed between them by closing the tool halves. The sealing surfaces are preferably provided on the walls of the tool halves surrounding the mold cavity. The auxiliary film arranged between the sealing surfaces seals the first tool half and the second tool half against each other and in particular also the mold cavity. Accordingly, the auxiliary film also acts as a sealant and in particular as a sealing lip for sealing the mold cavity. Therefore, it is not absolutely necessary and preferably not provided for further sealing means to be provided between the tool halves to seal the mold cavity.

For easy arrangement of the auxiliary film with the raw part arranged and fixed to it In the mold cavity, it can also be provided that mutually corresponding alignment aids or alignment elements are provided on the forming tool and on the auxiliary film. For example, it can be provided that on the forming tool and in particular on the first tool half, projections designed as pins, for example, and on the auxiliary film, recesses corresponding to the projections and, for example, designed as elongated holes are provided as alignment aids, through which the auxiliary film and with it the raw part are in step d. be brought into a predetermined position and position in the first part of the mold cavity.

Furthermore, the alignment aids or the projections and the associated recesses can also be coded, so that the auxiliary film can only be arranged on the tool half in a single predetermined manner.

Although the alignment elements can be provided within the sealing surfaces, it is advantageous to improve the sealing if the alignment elements on the forming tool are arranged outside the sealing surfaces and outside the mold cavity.

The auxiliary film is preferably a disposable and correspondingly non-reusable sacrificial film, although it can still be recyclable.

In step b. the raw part is preferably glued to the auxiliary film with an adhesive and/or an adhesive tape, wherein the adhesive or the adhesive tape is further preferably temperature-resistant, so that it can withstand the temperatures resulting from the application of pressure as intended and the raw part does not detach from the auxiliary film.

The adhesive does not necessarily have to be applied as an adhesive tape or double-sided adhesive tape, but can also be applied, for example, as a spray film to the raw part or the auxiliary film and thereby sandwiched between them.

A further aspect of the invention relates to a decorative part with a three-dimensionally shaped surface with a visible side and a back facing away from it, the decorative part or parts of the decorative part preferably being produced with the system proposed according to the invention. The decorative part has a laminated body on the visible side, which is shaped three-dimensionally to correspond to the surface of the decorative part, and a carrier layer on the back for stabilizing and reinforcing the laminated body. The layered body is formed from an initially arcuate material that is not fluid-tight and in particular not gas-tight, such as wood and in particular a veneer. The laminated body is preferably porous and/or has cracks, with openings formed thereby in the laminated body being able to be closed, for example, by a visible protective layer or the carrier layer.

The invention therefore relates in particular to a system consisting of a forming tool and auxiliary film for forming or for three-dimensional stretching of an arcuate and not fluid-tight and in particular not gas-tight material, which, as explained, is in particular porous and/or tends to form cracks. In order to still be able to form such a non-fluid-tight or non-gas-tight material or a raw part provided therefrom by applying high pressure using a fluid, it is provided that the forming tool has a two-part mold cavity, a first tool half, which determines the first part of the mold cavity, and has a second tool half, which defines the second part of the mold cavity. The first tool half and the second tool halves each have sealing surfaces for direct contact with the auxiliary film, which are designed to be pressed against the auxiliary film and to seal the tool halves against each other and the mold cavity in a fluid-tight manner, dividing them into the two parts. As a result, the raw part can be arranged completely in the mold cavity and pressed against the second, shaping part of the mold cavity under pressure via the auxiliary film. Furthermore, preferably no further sealing element and in particular no sealing lip or the like is necessary on or between the tool halves.

The features disclosed above can be combined in any way, as long as this is technically possible and they do not contradict each other.

• 1 - 9 Schritte eines mit dem System durchführbaren Verfahrens zur Herstellung eines Dekorteils;
• 10 eine Einheit aus Hilfsfolie und Rohteil;
• 11 eine Hilfsfolie mit Schichtkörper;
• 12 ein Dekorteil.

Other advantageous developments of the invention are characterized in the subclaims or are shown in more detail below together with the description of the preferred embodiment of the invention with reference to the figures. Show it:

• 1 - 9 Steps of a method for producing a decorative part that can be carried out with the system;
• 10 a unit consisting of auxiliary film and blank part;
• 11 an auxiliary film with a laminated body;
• 12 a decorative piece.

The figures are exemplary schematic. The same reference numbers in the figures indicate the same functional and/or structural features.

They show 1 until 9 the steps of a method that can be carried out with the system according to the invention, in particular for producing an example in 12 illustrated decorative part 10, whereby the 1 until 9 present the steps in a preferred order and the 10 and 11 in particular intermediate products resulting from the process in the production of the decorative part 10 according to 12 depict.

The decorative part 10, as shown for example in 12 is shown, has a multi-layer structure and a three-dimensionally shaped surface 11, that is, extending out of a plane. In addition to a back support layer 70 and a visible-side decorative layer formed by a laminated body 50, the decorative part 10 can also have further layers and in particular a visible-side protective layer that covers the laminated body 50 and is transparent.

If an arch-shaped natural material, such as wood, in particular in the form of a veneer, is to be used as the starting material for the laminated body 50, there is often the problem that these are not fluid-tight, in particular not gas-tight, or at least not permanently or reliably. Accordingly, these materials cannot be reliably brought into the required shape using a deep-drawing process known and widespread in the prior art as high-pressure forming, since gas-tightness is an essential prerequisite for this.

The proposed system can be used to implement a method in which, according to step a. A near-net-shape blank 20 is contoured from the starting material, which can be done by cutting the starting material to the blank 20 or cutting out the blank 20 from the starting material. Since the raw part 20 is already close to the final shape and, for example, has the same area or only a slightly larger area than the laminated body 50 in the finished decorative part 10, more raw parts 20 can be provided from a given amount of the natural material than with a large number of off-the-shelf ones Procedures known to the art.

This blank 20 is produced according to steps b. and c. arranged on an auxiliary film 30, aligned with it and connected to it, so that the blank 20 and the auxiliary film 30 form a unit, as shown schematically in 1 visible and for example in 10 is shown. The auxiliary film 30 is larger than this in terms of its extent in the plane of the blank 20, so that the auxiliary film 30 surrounds the blank 20 with a free section 33 in a frame shape.

According to step d. and as in 1 and 2 shown, the unit consisting of auxiliary film 30 and blank 20 is arranged in a forming tool 40 or in a mold cavity of a forming tool 40, so that the mold cavity is divided into a first part 41 and a second part 42 by the auxiliary film 40. When it comes to the arrangement, it is of great relevance that the blank 20 is arranged in the first part 41 of the mold cavity by means of the auxiliary film 30 in such a way that the blank 41 is free on all (four) sides in the plane of its extension. The edge sides 21 of the blank 20 are therefore at a predetermined distance from the walls of the forming tool 40 that form the mold cavity.

To illustrate this feature, that is, the blank 20 is arranged completely in the mold cavity and is free on all sides in the plane, is shown in 10 an imaginary inner wall edge 48 of the walls of the forming tool 40 that determine the mold cavity is shown, through which it becomes clear that the blank 20 does not extend in particular between sealing surfaces 46 of the forming tool 40, which will be explained below.

To go to step d. In order to enable a simple and quick arrangement of the raw part in its predetermined position within the first part 41 of the mold cavity, in the present case there are also alignment aids 37, 47 in the form of pins 47 provided on the forming tool 40 and corresponding oval recesses 37 in the auxiliary film 30 intended. Because the auxiliary film 30 with the recesses 37 is guided over the pins 47, the raw part is automatically brought into the predetermined position and position.

The alignment aids 37, 47 are in the 1 and 10 shown as an example and can also be implemented differently. For example, the pins 47 can be as shown on the right side of the 1 indicated within the sealing surfaces 46 of the forming tool 40 or as on the left side of the 1 indicated and, due to the improved seal, can advantageously be provided outside the sealing surfaces 46 of the forming tool 40.

These different variants are also in 10 indicated by the imaginary lines of the inner wall edge 48 and the outer wall edge 49. On the right side of the illustration, the recesses 37 are within the sealing surfaces 46 delimited by the inner wall edges 48 and the outer wall edges 49 and on the left side In the illustration, the recesses 37 are provided outside the sealing surfaces 46 delimited by the inner wall edges 48 and the outer wall edges 49.

If the raw part 20 has been brought into this predetermined position and position in the first part 41 of the mold cavity, the two tool halves 44, 45 of the forming tool train 40 are closed, so that the auxiliary film 30 extends between the sealing surfaces 46 of the forming tool 40 and the mold cavity to the outside seals. Accordingly, the auxiliary film 30 acts as a sealing lip for sealing the mold cavity, so that additional sealants do not necessarily have to be present on the forming tool 40 for this purpose.

As in 2 shown, a fluid, in particular gas, more particularly air, is then introduced into the second part 42 of the mold cavity, so that the fluid-tight auxiliary film 30 is pressurized on its second side 32. The pressure acting on the second side 32 of the auxiliary film is transferred to the raw part 20 on the first side 31 of the auxiliary film 30, so that it is pressed with the auxiliary film 30 into the first part 41 of the mold cavity and, as in 3 shown, nestles against a shaping wall 43, the shape of which corresponds to the surface 11 of the decorative part 10. Depending on the properties of the starting material, the pressure can then be maintained or, if necessary, further steps can be carried out until the blank 20 nestled against the shaping wall 43 is permanently formed into a layered body 50, which has a shape corresponding to the surface 11 of the decorative part 10.

The deformation and forming takes place regardless of whether the starting material is already leaking before the process implemented by the proposed system or, for example, becomes leaky during the process due to crack formation.

The remaining unit consisting of the auxiliary film 30 and the blank 20 formed into the laminated body 50 is removed from the forming tool 40 and is shown, for example, in FIGS 4 and 11 shown.

According to the method that can be carried out with the system according to the invention, this unit is now, as in 5 visible, dissolved and the layered body 50 separated from the auxiliary film 30. The auxiliary film 30 is preferably a sacrificial film that can only be used once, but is recyclable so that it can be disposed of or reused after separation from the laminated body 50.

The now separated layer body 50 can then be used, as in 6 shown, inserted between the tool halves 61, 62 of an injection mold 60, the tool halves 61, 62 closed to form a cavity 63 and, as in 7 shown, back-injected. For this purpose, an injection molding material, in particular plastic, is introduced into the cavity 63 through a supply line 67, so that a carrier layer 70 is formed in the cavity 63 or in the injection mold 60, which is integrally connected to the laminate 50 and reinforces the laminate.

The unit of laminated body 50 and the carrier layer 70 can, as in 8th shown, can be removed from the injection mold 60.

In 9 the unit of laminated body 50 and the carrier layer 70 is shown again individually, this already essentially corresponding to the decorative part 10, the surface 11 of the decorative part 10 being defined on the visible side by the laminated body 50 and, if necessary, can be supplemented by a protective layer, not shown.

The implementation of the invention is not limited to the preferred exemplary embodiments given above. Rather, a number of variants are conceivable, which make use of the solution presented even in fundamentally different designs.

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was 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

• EP 0371425 A2 [0004, 0005]
• DE 4113568 C1 [0004]
• EP 2322339 A2 [0006]

Claims (10)

System consisting of a forming tool (40) and auxiliary film (30) for forming an arcuate and non-fluid-tight material, designed to carry out a method for producing a decorative part (10) with a three-dimensionally shaped surface (11) starting from an arcuate and non-fluid-tight material, comprising at least the steps: a. Cutting the material into a near-net-shape blank (20) or cutting out a near-net-shape blank (20) from the material, the blank (20) extending in a plane; b. Arranging the blank (20) on a fluid-tight auxiliary film (30) and aligning the blank (20) on the auxiliary film (30), so that the auxiliary film (30) protrudes beyond the blank part (20) on each side in the plane and the blank part (20) runs around in a frame shape with a free section (33); c. Connecting the auxiliary film (30) with the raw part (20) aligned thereon to form a unit; d. Arranging the blank (20) connected to the auxiliary film (30) in a mold cavity of a forming tool (40), wherein the mold cavity is separated in a fluid-tight manner by the auxiliary film (30) into a shaping first part (41) and a second part (42) to be pressurized and wherein the blank (20) is brought into a predetermined position and position in the first part (41) of the mold cavity by means of the auxiliary film (30), in which the blank (20) is completely arranged in the mold cavity and through the auxiliary film (30) is fixed; e. Introducing a fluid into the second part of the mold cavity, so that the auxiliary film (30) is subjected to pressure on its side (32) facing the second part (42), the pressurized auxiliary film (30) presses the raw part (20) on its side (31) facing the first part (41) in a shaping manner against a wall (43) of the first part (41), which forms the three-dimensionally shaped surface (11) of the Decorative part (10) corresponds, and the previously flat blank (20) is formed into a layered body (50) with a shape corresponding to the three-dimensionally shaped surface (11). System after Claim 1 , further designed to carry out the steps: f. removing the laminated body (50) with the auxiliary film (30) from the forming tool (40); G. Removing the auxiliary film (30) from the laminate (50); H. Arranging the laminated body (50) in an injection mold (60); i. Back-injection or overmolding of the laminated body (50) with a carrier layer (70) to stabilize and reinforce the laminated body (50). System after Claim 1 , further designed to carry out the steps: f. removing the laminated body (50) with the auxiliary film (30) from the forming tool (40); G. Removing the free section (33) of the auxiliary film (30) from the laminate (50); H. Arranging the laminate (50) with the auxiliary film (30) in an injection mold (60); i. Back-injection or overmolding of the laminated body (50) with a carrier layer (70) to stabilize and reinforce the laminated body (50). System according to one of the preceding claims, wherein the forming tool (40) has a first tool half (44), which defines the first part (41) of the mold cavity, and a second tool half (45), which defines the second part (42) of the mold cavity, and the auxiliary film (30) before step e. is pressed between sealing surfaces (46) provided on the first tool half (44) and the second tool half (45) and seals the first tool half (44) and the second tool half (45) against one another. System according to one of the preceding claims, wherein mutually corresponding alignment aids (37, 47) are provided on the forming tool (40) and on the auxiliary film (30), through which the auxiliary film (30) and with it the blank (20) in step d. be brought into a predetermined position and position in the first part (41) of the mold cavity. System according to one of the preceding claims, wherein the auxiliary film (30) is a disposable sacrificial film. System according to one of the preceding claims, wherein the blank (20) in step b. is glued to the auxiliary film (30) with an adhesive and/or an adhesive tape. System according to one of the preceding claims, wherein the forming tool (40) has a two-part mold cavity, a first tool half (44) which defines a first part (41) of the mold cavity, and a second tool half (45) which defines a second part (42 ) of the mold cavity, the first tool half (44) and the second Tool halves (45) each have sealing surfaces (46) for direct contact with the auxiliary film (30), which are designed to be pressed against the auxiliary film (30) and the tool halves (44, 45) against each other and the mold cavity in a fluid-tight manner in the two parts (41, 42) to be sealed dividingly. Decorative part (10) with a three-dimensionally shaped surface (11) with a visible side (S) and a back side (R) facing away from it, wherein the decorative part (10) has a laminated body (50) towards the visible side (S), which is formed three-dimensionally corresponding to the surface (11) of the decorative part (10), and a carrier layer (70) towards the back (R). Stabilization and reinforcement of the layered body (50), wherein the laminated body (50) is formed from an arcuate and non-fluid-tight material, wherein the laminate (50) is porous and/or has cracks. Decorative part according to the preceding claim, produced with a system according to one of Claims 1 until 8th .

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