DE102020200027B4 - Plastic structure, in particular an armrest structure with an integrated force absorbing element, and method for producing a plastic structure - Google Patents

Abstract

Plastic structure (100) comprising at least one base structural part (1) made of a fiber-reinforced plastic material and at least one belt-like force absorbing element (2) made of a fiber-reinforced plastic material, which forms an upper strand (2A) and a lower strand (2B), the at least one belt-like Force absorbing element (2), starting from a fixing element at a predeterminable fixed point, at at least one deflection point (Un) by means of at least one deflection element (10, 20, 30', 30") arranged on/in the base structural part (1) and consisting of a metal and/or a plastic material, is deflected, with the at least one deflection element (10, 20, 30', 30") being positioned on/in the base structural part (1) in such a way that the upper strand (2A) and lower strand (2B ) are arranged oriented along a bending line (Bx, By, Bz) of the base structural part (1), the belt-like force absorbing element (2) being integrated in the plastic material of the base structural part (1). rt is arranged.

Description

The invention relates to a plastic structure, in particular an armrest structure with an integrated force absorbing element.

The state of the art includes, as shown in 1 , Armrests or, in particular, center armrests in the rear seats of a vehicle, but also center armrests between the front seats or on individual seats, so that center armrests or individual armrests are used.

Conventional armrests of this type are designed as armrests or as an underlying console or as armrests which are arranged on consoles, the armrest then forming a cover on the respective console (which has different designs).

According to the exploded view, the conventional armrest structure 100S as an assembly part comprises a steel skeleton 1S, a foam part (not shown), a cover (not shown) and often inserts 2S, such as in particular a cup holder made of a Plastic material, the deposits or so-called inserts are usually made as plastic injection molded parts. Fitting parts 3S supplement the armrest structure 100S in such a way that the armrest structure 100S can be folded relative to a backrest part of a rear seat system (not shown) or a console (not shown).

Armrest structures are also known in which the steel skeleton has been partially or completely replaced by other materials.

According to the pamphlet U.S. 9,162,597 B2 it is known that a metal frame of the armrest structure is overmoulded with a plastic. The pamphlet U.S. 2018/0281246 A1 discloses an armrest structure that includes fiberboard that is formed and impregnated with plastic. In the pamphlets U.S. 10,232,815 B1 and US 2013/0122246 A1 frames of the respective armrest structure or armrest structures are disclosed, which consist of plastic with fiber reinforcements. An overmolded panel provided with fiber reinforcements as part of the armrest structure is from the reference U.S. 10,093,268 B2 known. Consoles made of plastic, on which the armrest structure rests like a lid, are out U.S. 9,630,535 B2 known. An armrest in which the bending forces in particular are absorbed by fiber reinforcement is described in the publication U.S. 2019/0150622 A1 explained. As a further technological background, the publication U.S. 2,572,526 A called.

The invention is based on the object of creating an improved armrest structure which can be produced particularly inexpensively, has only a low weight and into which sufficiently large forces can be introduced in accordance with the specifications, which up until now have only been guaranteed by the structural design of conventional steel skeleton armrests could.

This object is achieved by a plastic structure having the features of claim 1 and a method having the features of claim 12.

• • mindestens ein Basis-Strukturteil aus einem faserverstärktem Kunststoffmaterial und
• • mindestens ein riemenartiges Kraftaufnahmeelement aus einem faserverstärktem Kunststoffmaterial, welches einen Obertrum und einen Untertrum bildet,
• • wobei das mindestens eine riemenartige Kraftaufnahmeelement, von einem Fixierelement an einem vorgebaren Fixpunkt ausgehend, an mindestens einem Umlenkpunkt mittels mindestens einem am/im Basis-Strukturteil angeordneten Umlenkelement, das aus einem Metall und/oder einem Kunststoffmaterial ausgebildet ist, umgelenkt wird,
• • wobei das mindestens eine Umlenkelement am/im Basis-Strukturteil derart positioniert ist, dass Obertrum und Untertrum entlang einer Biegelinie des Basis-Strukturteiles orientiert angeordnet sind,
• • wobei das riemenartige Kraftaufnahmeelement in dem Kunststoffmaterial des Basis-Strukturteiles integriert angeordnet ist.

The plastic structure according to the invention comprises

• • at least one basic structural part made of a fiber-reinforced plastic material and
• • at least one belt-like force absorbing element made of a fiber-reinforced plastic material, which forms an upper strand and a lower strand,
• • wherein the at least one belt-like force absorbing element, starting from a fixing element at a predeterminable fixed point, is deflected at at least one deflection point by means of at least one deflection element which is arranged on/in the base structural part and is made of a metal and/or a plastic material,
• • wherein the at least one deflection element is positioned on/in the base structural part in such a way that the upper run and lower run are arranged oriented along a bending line of the base structural part,
• • wherein the belt-like force absorbing element is integrated into the plastic material of the base structural part.

Plastic structure is an example of an armrest structure.

Preferred configurations are explained in more detail in the description and are noted in the dependent claims.

• 1 eine perspektivische Explosionsdarstellung einer herkömmlichen Struktur, insbesondere einer Armlehnenstruktur;
• 2 eine perspektivische Darstellung einer erfindungsgemäßen Kunststoffstruktur, insbesondere einer Armlehnenstruktur, wobei die Basisstruktur transparent dargestellt ist;
• 3 eine perspektivische Schnittdarstellung der erfindungsgemäßen Kunststoffstruktur, insbesondere der Armlehnenstruktur mit Blick auf eine Schnittfläche, wobei die Basisstruktur transparent dargestellt ist;
• 4 eine perspektivische Schnittdarstellung der erfindungsgemäßen Kunststoffstruktur, insbesondere der Armlehnenstruktur mit Blick auf die der Schnittfläche gemäß 3 gegenüberliegende Außenfläche der Armlehnenstruktur;
• 5A eine Vorrichtung zur Herstellung eines Kraftaufnahmeelementes der Kunststoffstruktur in einer ersten Ausführungsform;
• 5B eine Vorrichtung gemäß 5A mit dem Kraftaufnahmeelement;
• 5C eine Vorrichtung zur Herstellung eines Kraftaufnahmeelementes der Kunststoffstruktur in einer zweiten Ausführungsform;
• 6 das Kraftaufnahmeelement in einer Einzeldarstellung in einer Seitenansicht; und
• 7 eine schematische Darstellung der Herstellungsschritte zur Herstellung der Kunststoffstruktur, insbesondere der Armlehnenstruktur mittels eines Prozess-Schaubildes.

The invention is explained below with reference to the accompanying drawings. Show it:

• 1 an exploded perspective view of a conventional structure, particularly an armrest structure;
• 2 a perspective view of a plastic structure according to the invention, esp special armrest structure, wherein the base structure is shown transparent;
• 3 a perspective sectional view of the plastic structure according to the invention, in particular the armrest structure with a view of a cut surface, wherein the base structure is shown transparent;
• 4 a perspective sectional view of the plastic structure according to the invention, in particular the armrest structure with a view of the section surface 3 opposite outer surface of the armrest structure;
• 5A a device for producing a force absorbing element of the plastic structure in a first embodiment;
• 5B a device according to 5A with the force absorbing element;
• 5C a device for producing a force absorbing element of the plastic structure in a second embodiment;
• 6 the force absorbing element in an individual representation in a side view; and
• 7 a schematic representation of the manufacturing steps for manufacturing the plastic structure, in particular the armrest structure by means of a process diagram.

For the purpose of description, a horizontal direction of the armrest structure shall be denoted by “x”. “y” denotes the horizontal direction orthogonal to the x-direction, and “z” denotes the vertical direction of the armrest structure orthogonal to the x-direction. Within all the figures, the same reference numbers are used below for the same components, with all the components already presented possibly not being explained again using the reference numbers in each figure.

the 2 , 3 and 4 are explained below in a synopsis.

the 2 12 is a perspective view of an armrest structure 100 according to the present invention, wherein the armrest structure 100 is either a cover placed on a console or an armrest structure placed in a structure in a vehicle with no underlying console.

The armrest structure 100 is foldable or pivotable. For folding or pivoting, the armrest structure 100 has a continuous axis element with axis elements protruding from the armrest structure 100 or only axis elements 20 protruding laterally from the armrest structure 100, by means of which the armrest structure can be folded/pivoted about a rotation axis Y2.

If an axis element is provided that runs through the armrest structure 100, the positional stability of the axis elements 20 protruding laterally from the armrest structure 100 increases.

According to the representation in the figures, laterally projecting axle elements 20 are arranged on both sides (according to the invention at least on one side) in the exemplary embodiment, by means of which the armrest structure 100 is mounted, for example, in a structure, in particular the backrest-side structure of a rear seat system.

Also shown is a stop axis Y1 on which in the exemplary embodiment (according to the invention on at least one side) laterally projecting stop elements, in particular stop pins 10 or the like, are arranged. The stop elements 10 shown in the exemplary embodiment are connected to the carrier 1 in a rotationally fixed manner.

The stop elements 10 can also be formed by a stop element that runs through the armrest structure 100, which also increases the positional stability of the stop elements 10 that protrude laterally from the armrest structure 100.

In a preferred embodiment, the axis element that runs through the armrest structure 100 and the stop element that runs through the armrest structure 100 are firmly connected to one another (for example as a welded metal part) (not shown), so that the elements arranged parallel to one another (axis element and stop element) do not move when a force is introduced can intertwine with each other.

For reasons of cost and weight, only the stop elements 10 and axle elements 20 protruding laterally from the armrest structure 100 are preferably arranged in such a way that they are firmly connected to one another (on each side) according to the principle explained above (e.g. as a welded metal part), so that analogously to According to the previous paragraph, the elements (axle element 20 and stop element 10) which are arranged parallel to one another and protrude from the armrest structure 100 cannot cross one another when a force is introduced.

The two axis elements 20 engage along the axis of rotation Y2 in a base structural part 1, which acts as a support element of the armrest structure ture is formed and is referred to as “carrier” for short below. The axle elements 20 shown in the exemplary embodiment are connected to the carrier 1 in a rotationally fixed manner.

In the exemplary embodiment, two sockets 30′, 30″ are arranged integrated in the support 1 on each side of the support 1, the integration of the sockets 30′, 30″ in the support 1 being discussed below.

The bushings 30', 30" lie on the bushing axes denoted by the reference numeral Y3', Y3". The bush axes Y3', Y3" are parallel to the axis of rotation Y2 and the stop axis Y1.

The precautions explained above serve to arrange a force absorbing element 2, as will be explained in detail below.

According to the invention, the force absorbing element 2 is a type of belt, in particular a tensioning belt.

The belt, in particular the tensioning belt 2, is preferably made of a plastic material, which will also be discussed later.

The tensioning belt 2, for reasons of symmetry in particular one tensioning belt 2 on each side, encloses at least the stop elements 10 and the at least one bushing 30', 30".

In other words, in the exemplary embodiment, the tensioning belt 2 spans at least one stop element 10 and at least one bushing 30', 30", with provision being made for the tensioning belt 2 to lie in alignment or in an imaginary x/z plane when viewed in the x-direction is arranged.

In terms of material, it is provided that the axle elements 20 or the axle and the bushings 30', 30'', preferably also the stop elements 10, are made of a metal, in particular steel.

The carrier 1 advantageously consists overall of a plastic, as a result of which a low weight of the armrest structure 100 is ensured.

A fiber-reinforced plastic is preferably used, which is introduced in an injection molding process into a tool provided for this purpose and which maps the contour of the carrier 1 .

In a preferred embodiment of the invention, these are basalt, natural, aramid, carbon or glass fibers.

The integration of the components 10, 20, 30', 30'' in the support 1 brings about functional integration, as a result of which the armrest structure according to the invention can be produced with cost and weight advantages compared to the conventional assembly method.

the 3 shows in synopsis and according to the previous explanations 2 a perspective sectional view of the armrest structure 100 according to the invention with a view of a sectional area, wherein the carrier 1 is shown as the base structure of the armrest structure 100 transparent.

the 4 shows further in synopsis with the 2 and 3 a perspective sectional view of the armrest structure 100 according to the invention with a view of the section according to 3 opposite outer surface of the armrest structure 100.

The invention provides for the following production of the tensionable belt 2 as a force absorbing element.

The belt 2 has fiber material that is impregnated with a plastic matrix, which is preferably basalt, natural, aramid, carbon or glass fibers or bundles thereof.

The belt 2 can be produced almost endlessly in the form of a rod or string and can be present in one of the two forms for further processing.

Wands and Strings are also known as Rod's and are in 7 marked with the reference R.

The belts, in particular the pre-product produced for the manufacture of the belt 2, is therefore available either as a bar in packaging that is cheap on Euro pallets or as a bar or string as rolled goods on a roll.

A granulate G, which is also used to produce the carrier 1, is present either as a so-called short-fiber material (fine granulate G with a short fiber length) or as a so-called long-fiber material (coarse granulate G with a longer fiber length). The fiber length of the granules is therefore dependent on the predeterminable average length of the granules.

It is envisaged that the production of the granulate G and the production of the rod or string will be possible in parallel in one plant.

Preferably, the belts 2 and the material for producing the carrier 1 are made of the same material, the plastic used, in particular polyamide [PA] or polypropylene [PP], which is made with fiber material, in particular basalt, natural, aramid, carbon - Provided or glass fibers, in particular reinforced.

It goes without saying that, in principle, other materials and combinations of materials are also possible.

The previously described material equality (purity) of the material of the belt 2 and the granules, i.e. the overmolding material (fine granules G with short fiber length) or (coarse granules G with longer fiber length) for the production of the carrier 1 is of particular advantage, since the production simplified and a uniform recycling process becomes possible.

During the manufacture of the armrest structure 100 in the injection molding process, the plastic material of the belt 2 previously manufactured and introduced into the mold melts without losing contact with the fibers or fiber bundles of the fiber material, so that it ideally combines with the material injected into the mold, the overmolding material , since the belt 2 and carrier 1 are made of the same material, with the impregnation of the fibers or fiber bundles of the fiber material significantly increasing the melted surface of the plastic, so that a particularly strong material connection is created that can absorb higher forces than a). Comparatively used plastic without fiber material (smaller surface and lack of fiber material) or b) as, for example, a pure fiber material (without plastic), so that there is no material connection between plastic and plastic.

During recycling, according to the invention, apart from the metallic material of the axle elements 20 and axles or the stop elements 10 and bushings 30', 30", only the thermoplastic matrix and the fiber material are then present, which in a recycling step advantageously lead to a pure sorting can become.

According to the invention, the straps, which are also referred to as reinforcement loops, can be manufactured in various ways.

As explained above, the preliminary product is a bar or a string from which a loop or a belt 2 is produced by heating the plastic to a predetermined temperature at which it is deformable due to its characteristic thermoplastic properties.

The fiber material contained is also heated, but does not reach its melting point. Due to their flexibility, they are also deformable and are brought into the desired shape, in particular the shape of a belt, together with the thermoplastic material.

It is provided that a rod or a string while the plastic is in this (deformable) deformable temperature range by means of a device 5', 5" (cf 5A until 5C ), which specifies the desired contour of the force absorbing element, in the exemplary embodiment of the belt 2, is wound.

In the exemplary embodiment, the desired belt contour, in particular the inner belt contour, is produced in that the rod or the string has at least one deflection element, in the exemplary embodiment several deflection elements 51' (cf 5A , 5B) or via a deflection contour 51" (cf 5C ) is wound at least once or preferably several times.

The deflection elements 51′ or the deflection contour 51″ form or form predetermined deflection points U _n (in the exemplary embodiment n=4 deflection points) which (cf 4 and 6 ) per belt 2 correspond to the position and number of the deflection elements, in particular the axis element 20 (1x) and the stop element 10 (1x) and the bushings 30', 30" (2x) in the carrier 1 of the armrest structure 100 to be produced.

Here, the belt 2 is made of at least a single turn (one turn) of the rod or string which is previously spirally wound, thereby forming a spirally wound string or rod belt 2 .

Alternatively, the belt 2 may preferably be made up of multiple turns (multiple turns) of the rod or string such that the string or rod of the belt 2 runs parallel or crossed, thereby forming a parallel or crossed string or rod belt 2 .

In 5B a belt 2 with a parallel string or rod is shown by way of example, which has, for example, six turns (six windings), so that ultimately there is a flat inner contour of the belt that fits within the armrest structure 100 in an integrated manner to the flat outer contour of the axis elements 20 and the stop elements 10 and sockets 30', 30''.

The specific design of the belt, in particular the number of windings, depends on the component geometry and the requirements for the forces to be transmitted.

For example, up to twenty windings are preferably provided, with between five and ten windings being sufficient in most applications to transmit the necessary forces.

After the end of the supply of heat, the pre-product further processed into a belt 2 solidifies again and remains in the predetermined belt shape due to the thermoplastic change in the plastic material structure. The winding can be done manually or, preferably, automatically. Machining or post-machining with the addition of heat and fusing or aligning and fusing the individual windings or the belt as a whole is also advantageously possible.

In a preferred embodiment, it is provided that the bushings 30', 30" and/or the axles or axle elements 20 or also the stop elements 10 are already arranged in the device 5', 5" so that the winding of the rod or the string around the Components 10 and/or 20 and/or 30', 30" directly in the device 5', 5".

Alternatively, this structure (not shown) is then advantageously made up of belts 2 and/or bushings 30', 30" and/or stop elements 10 and/or axles or axle elements 20, with the structure being a prefabricated intermediate component which will later be in the assembled state located armrest structure 100 is positioned in the mold and overmoulded, so that the armrest structure 100 is formed from the support part 1 with an integrated intermediate component.In other words, the prefabricated structure G is placed in the injection mold and then with the overmoulding material, which corresponds to the material of the belt 1 corresponds, overmoulded.

A further aspect of the invention consists in the fact that the belt 2 in the carrier 1 advantageously forms so-called unidirectional fiber strands, which are surrounded by the encapsulation of short- or long-fiber-reinforced fiber strands within the carrier 1 .

According to 6 the unidirectional fiber strands are aligned in the x-direction according to the direction definition. The unidirectional fiber strands of the belt 2 are thus oriented in the direction that coincides with the mean bending line B _x (which also runs in the x-direction). 4 and 6 is shown) of the carrier 1 matches.

This means that the belt 2 causes increased rigidity of the carrier 1 explicitly in the x-direction due to the unidirectional fiber strands oriented in the x-direction, so that the flexural rigidity of the armrest structure 100 is increased by the integrated belt(s) 2 in the longitudinal extension of the armrest structure 100.

In 4 is an example of a force application point of a vertical force F _z applied in the area of one of the belts 2, where in 2 reference is made to the second force application point with the force Fz, _for which the following basic explanation also applies.

When the armrest structure 100 is in use, people transmit forces F _z into the armrest structure 100, which, particularly at higher vehicle temperatures where short- or long-fiber-reinforced thermoplastic components are used as the material for the carrier, reach their mechanical limits due to their softening.

It has been found that the unidirectional fiber strands of the belt(s) 2 contribute significantly to the stability of the armrest structure 100, with reinforcement by the leverage effect between the force application point(s) and the pivot axis Y2 being particularly important in the longitudinal extension x of the armrest structure 100 is, which is why the belt or belts 2 are arranged in the armrest structure 100 in a correspondingly aligned manner in the x-direction.

It goes without saying that the directions x, yz are only to be understood as examples. In addition, it goes without saying that a single belt 2 may already develop the effect according to the invention. In addition, it is understood that a plastic structure in general, and thus also an armrest structure 100, can comprise a plurality of straps 2, with each of the straps 2 being arranged unidirectionally in one of the three spatial directions x, y, z and being able to develop its effect. In other words, one, two or three or even more than three straps 2 can preferably be arranged in an armrest structure 100 . According to the exemplary embodiment, two straps can preferably be provided on each side of the armrest structure 100 in the longitudinal extension x of the armrest structure 100 in its folded-down position of use, which corresponds to the longitudinal direction of the vehicle in the exemplary embodiment. However, depending on requirements, in particular the present direction of force introduction, belts 2 can only be in the y-direction transverse to the direction of travel x or only perpendicularly in the z-direction transverse to the direction of travel x or one Combination of these three directions x, y, z can be selected.

It is also disclosed that the forces that can be absorbed by the belt 2 increase in an advantageous manner if, according to the exemplary embodiment, the belts 2 are arranged integrated into the carrier 1 with a pre-determinable pretension.

For this purpose, the tool (not shown) is constructed in such a way that it has a movable element in the area of the belt 2 .

On the one hand, this movable element ensures that tolerances of the prefabricated belts can be taken into account and thus the insertion is made possible and simplified, while on the other hand the belts 2 are kept in the tool under a predeterminable pretension until they are retained in the manufacturing process, in particular in the injection molding process the preload are overmoulded.

It was found that the positive, stabilizing mechanical properties of the belts 2 integrated in the carrier 1 and of the armrest structure 100 have a particularly favorable effect when the prestressing forces do not exceed a specific, predeterminable amount.

Furthermore, it was found and forms a further essential aspect of the invention that the position of the at least one belt 2 or the (several) belts 2 at a distance from the central bending line B _x is advantageous in order to increase the bending stiffness.

As a basic arrangement, the belt 2 lies at one end between at least one fixed point on a fixing element (not shown) and at the other end at the at least one deflection point (U _n ; n=1).

According to the exemplary embodiment, the first fixed point is already formed as a deflection point U1 by the stop element 10, and a second deflection point U2 is formed by the first bushing 30'.

Furthermore, according to the selected embodiment, two further deflection points U3, U4 are formed on the second bushing 30" and the axle element 20, whereby the belt 2 has an upper strand 2A running essentially parallel and a lower strand 2B (compare reference numbers in Figs 2 , 3 , 4 and 6 ) forms, which are also arranged in an advantageous manner according to the embodiment substantially in a plane with the surfaces of the top and bottom of the carrier 1.

Especially in the 4 and 6 It can be seen that the upper strand 2A and lower strand 2B are arranged at a distance from the central bending line B _x , as a result of which the bending stiffness in the longitudinal extension of the armrest structure 100 is also increased.

In addition, according to the invention (see in particular 4 ) Between the upper run 2A and the lower run 2B, a stiffening structure 1A is provided laterally, in particular on both sides according to the exemplary embodiment, within the carrier part 1, which is designed as a star-shaped rib structure in the exemplary embodiment.

The measures explained, in particular in combination, have the advantageous effect that, in particular, the temperature-related reduction in flexural rigidity, ie a temperature-related greater deflection of the armrest structure 100, is avoided. Added to this is the desired reduction in weight due to the low use of metallic materials with a high specific weight. In addition, the recyclability of the subject matter of the invention, which has to be considered from an ecological point of view, is improved.

Finally, for further clarification, the essential steps of the manufacturing process are summarized and explained again using a system diagram.

Process steps:

Step I:

impregnating the fiber material with a plastic material or
different plastic materials with a predeterminable percentage by weight of the fiber material, in which the respective plastic material is thermally broken down and the fiber material is impregnated with the plastic structure, the respective plastic material hardening and a profile semi-finished product, in particular as a rod or string, is present.

Step I-A:

Short cut of the semi-finished profile and production of a granulate G optionally from the semi-finished profile made of one or the other plastic material.

Step I-B:

Long cut of the semi-finished profile from one or the other plastic material in a definable length and manufacture of a rod or string.

Steps IA and IB can be carried out at the same time or at different times in one or different systems.

Step II

Manufacture of deflection elements 10, 20, 30', 30'' from a metal or a plastic material or from the fiber material which is impregnated with a plastic material.

Step III:

Production of a belt-like force-transmitting element 2 by cutting a predeterminable length of a belt from the bar or string that has free ends, and repeated thermal decomposition of the plastic material and forming the cut-to-length belt into a belt-like force-transmitting element 2 (without connecting the free ends) and curing the force-transmitting element 2.

Step III (alternative):

Production of a belt-like force absorbing element 2 by cutting a predeterminable length of a belt from the rod or string that has free ends, and repeated thermal decomposition of the plastic material and forming the cut-to-length belt into a belt-like force absorbing element 2, with the free ends in a joint in the newly opened State to be connected at the ends.

step purple:

Insertion of deflection elements 10, 20, 30', 30" in a tool which has the negative form of a base structural part 1, and insertion of at least one of the hardened belt-like force absorbing element 2 in the tool and arrangement of the at least one belt-like force absorbing element 2 on at least one deflection element 10, 20, 30', 30".

Step IIIb takes place as an alternative to step IIIa.

Step IIIb:

Arranging the at least one hardened belt-like force absorption element 2 on at least one deflection element 10, 20, 30', 30'' outside the tool and inserting the structure preassembled in this way into the tool.

Step IV:

Heating and introducing the granules G produced in step I-A and injection molding or compression molding of the granules G within the tool to produce the positive mold of the base structural part 1 with the at least one belt-like force absorbing element 2 integrated into the base structural part 1.

According to the first embodiment variant IIIa of production, the axles or axle elements 20 and bushings 30', 30" as well as stop elements 10 according to step II and the belt according to step III are first inserted into the tool, then the belt 2 is pulled on and the belt 2 is Mold clamped Finally, the molten granulate G is filled into the mold and the beam 1 is cast, whereby the strap or straps 2 are integrally arranged in the armrest structure 100.

According to the second embodiment variant, step IIIb of production, the axles or axle elements 20 and bushings 30', 30" as well as the stop elements 10 and the belt 2 are laid in the tool together as a prefabricated structure according to steps II/III, after which the belt 2 is Finally, the molten granulate G is filled into the mold and the positive mold of the carrier 1 is cast, whereby the at least one strap 2 is arranged in an integrated manner in the armrest structure 100 .

The insertion and removal process step of the armrest structure 100 is ideally automated and ensures rapid cycle times when manufacturing the plastic structure, in particular the armrest structure 100.

The main advantages of the method of construction and production according to the invention, in addition to the weight saving and the lower material, process and component costs, are also the simple type of recycling at the end of the component life. Alternatively, other manufacturing processes, such as plastic compression molding, may be used to fabricate the plastic structure.

Reference List

100S

Armlehnenstruktur

1S

Stahlskelett

2S

Einlagen

3S

Beschlagteile

State of the art:

100S

armrest structure

1S

steel skeleton

2S

insoles

3S

fitting parts

100

Armlehenstruktur

Y1

Anschlagachse der Elemente 10

Y2

Drehachse, Schwenkachse der Elemente 20

1

Träger, Basisstrukturteil, Trägerteil

1A

Versteifungsstruktur

2

Kraftaufnahmeelement, Riemen

2A

Obertrum

2B

Untertrum

10

Umlenkelement; Anschlagstifte, Anschlagelement

20

Umlenkelement; Achsenelement

30', 30"

Umlenkelement; Buchsen

5', 5"

Vorrichtung

51'

Umlenkrolle

51"

Umlenkkontur

Bx, By, Bz

Biegelinien orientiert in den Raumrichtungen x, y, z

Bx

Biegelinie in x-Richtung orientiert

Fz

Kraft

Y3', Y3"

Buchsenachsen der Elemente 30', 30"

Un; U1, U2, U3, U4

Umlenkpunkte (n = Anzahl)

G

Granulat

R

Stab, String, (Rod)

Invention:

100

armrest structure

Y1

Stop axis of the elements 10

Y2

Axis of rotation, pivot axis of the elements 20

1

Carrier, base structure part, carrier part

1A

stiffening structure

2

Force absorbing element, belt

2A

upper run

2 B

return run

10

deflection element; Stop pins, stop element

20

deflection element; axis element

30', 30"

deflection element; sockets

5', 5"

contraption

51'

pulley

51"

deflection contour

Bx, By, Bz

Bending lines oriented in the spatial directions x, y, z

bx

Bending line oriented in x-direction

vehicle

power

Y3', Y3"

bushing axles of elements 30', 30"

U.N; U1, U2, U3, U4

Deflection points (n = number)

G

granules

R

rod, string, (rod)

I

Tränken des Fasermaterials mit Kunststoff und Herstellen Profil-Halbzeug

I-A

Kurzschnitt des Profil-Halbzeug zu Granulat

II-B

Langschnitt des Profil-Halbzeugs zu einem Stab oder String

II

Herstellen von Fixier- und Umlenkelementen

III

Herstellen eines riemenartigen Kraftaufnahmeelementes aus dem Profil-Halbzeug

IIIa

separates Einlegen von Fixier- und Umlenkelementen und des riemenartigen Kraftaufnahmeelementes in ein Werkzeug

IIIb

gebildeartiges Einlegen von Fixier- und Umlenkelementen und des riemenartigen Kraftaufnahmeelementes in ein Werkzeug

IV

Einbringen des erhitzten Granulates G

Process steps:

I

Impregnating the fiber material with plastic and producing profile semi-finished products

i.a

Short cutting of the semi-finished profile into granules

II-B

Long cut of the semi-finished profile into a bar or string

II

Manufacture of fixing and deflection elements

III

Production of a belt-like force absorbing element from the semi-finished profile

IIIa

separate insertion of fixing and deflection elements and the belt-like force absorbing element in a tool

IIIb

structure-like insertion of fixing and deflection elements and the belt-like force absorbing element in a tool

IV

Introduction of the heated granules G

Claims (15)

Plastic structure (100) comprising at least one base structural part (1) made of a fiber-reinforced plastic material and at least one belt-like force absorbing element (2) made of a fiber-reinforced plastic material, which forms an upper strand (2A) and a lower strand (2B), the at least one belt-like Force absorbing element (2), starting from a fixing element at a predeterminable fixed point, at at least one deflection point (U _n ) by means of at least one deflection element (10, 20, 30', 30") arranged on/in the base structural part (1) which consists of a metal and/or a plastic material, is deflected, the at least one deflection element (10, 20, 30', 30") being positioned on/in the base structural part (1) in such a way that the upper run (2A) and the lower run ( 2B) are arranged oriented along a bending line (B _x , B _y , B _z ) of the base structural part (1), the belt-like force absorbing element (2) being embedded in the plastic material of the base structural part (1) is arranged integrated. Plastic structure (100) after claim 1 , characterized in that the fibers for reinforcing the plastic material are basalt, natural, aramid, carbon or glass fibers. Plastic structure (100) after claim 1 , characterized in that as deflection element(s) (10, 20, 30', 30"), non-rotatable axle elements (20) and/or non-rotatable stop elements (10) and/or non-rotatable bushing elements (30', 30") are used for arranging the at least one Force absorbing element (2) are arranged in the base structural part (1). Plastic structure (100) according to claims 1 and 2 , characterized in that the force absorbing element (2) is arranged in the pretensioned state on/in the plastic material of the base structural part (1) in an integrated manner. Plastic structure (100) after claim 1 or the claims 1 and 2 , characterized in that the force absorbing element (2) is a preliminary product which consists of fiber material (fibers and/or fiber bundles) and the plastic material is formed, with the fiber material being impregnated with the plastic material with thermal decomposition of the plastic material, with the preliminary product being processed into a rod or string after the plastic material has hardened, with the rod or string being cut to length to form the belt-like force absorbing element (2) with free ends and is formed with repeated thermal decomposition of the plastic material to form an open-ended belt (with free ends) or a closed belt (with ends butt-to-butt). Plastic structure (100) after claim 5 , characterized in that the belt-like force absorbing element (2) has a plurality of parallel belts or a plurality of wound belts. Plastic structure (100) after claim 1 , characterized in that the plastic material of the base structural part (1) and the plastic material of the belt-like force-transmitting element (2) are selected in such a way that the plastic materials, which are at least partially melted in a thermal process, bond in a material-to-material manner, so that the belt-like force-transmitting element (2) in the Plastic material of the base structural part (1) is arranged cohesively integrated. Plastic structure (100) after claim 1 , characterized in that the plastic material of the base structural part (1) and the plastic material of the belt-like force absorbing element (2) consist of the same plastic material. Plastic structure (100) according to at least one of the preceding claims, characterized in that at least one force absorbing element (2) unidirectionally or several force absorbing elements (2) unidirectionally along at least one or more spatial direction(s) (x, y, z) along the respective bending line (B _x , B _y , B _z ) is/are oriented. Plastic structure (100) according to at least one of the preceding claims, characterized in that the upper run (2A) and/or the lower run (2B) of the belt-like force absorbing element (2) to the respective middle bending line (B _x , B _y , B _z ) of the base structural part (1) is/are arranged at a definable distance from the bending line (B _x , B _y , B _z ), with at least one deflection point (U _n ; n = 1) or several deflection points (U _n ; n > 1) is/are formed, for which purpose the base and structural part (1) of the plastic structure (100) has at least one or more deflection elements (10, 20, 30', 30") claim 2 having. Plastic structure (100) after claim 1 or 10 , characterized in that at least one stiffening structure is formed between the upper run (2A) and lower run (2B) of the base and structural part (1), which is arranged oriented along the respective bending line (B _x , B _y , B _z ). Process for the production of a plastic structure according to at least one of Claims 1 until 11 with the following steps, I - impregnation of the fiber material with a plastic material or various plastic materials with a predeterminable percentage by weight of the fiber material, in which the respective plastic material is thermally broken down and the fiber material is impregnated with the plastic structure, with the respective plastic material curing and a profile semi-finished product being present , IA - short cut of the profile semi-finished product and production of a granulate (G) optionally from the profile semi-finished product made of one or the other plastic material, IB - long cut of the profile semi-finished product made of one or the other plastic material in a definable length and production of a rod or thongs; II - production of at least one deflection element (10, 20, 30', 30") from a metal or a plastic material which is reinforced with fibers or fiber bundles as fiber material, III - production of at least one belt-like force absorbing element (2) by cutting a predeterminable length of a Belt from the bar or string, which has free ends, and repeated thermal decomposition of the plastic material and reshaping of the belt in the newly opened state to form the belt-like force absorbing element (2) whose ends are free (open belt) and not connected, or impact on impact ( closed belt) are connected, and subsequent hardening of the force absorbing element (2), IIIa - inserting the at least one deflection element (10, 20, 30', 30") into a tool which has the negative form of a basic structural part (1), and Inserting at least one hardened belt-like force absorbing element (2) into the tool and arranging the mi At least one belt-like force absorbing element (2) on the one hand on the fixing element and on the other hand on at least one deflection element (10, 20, 30', 30") or IIIb - arranging the at least one hardened belt-like force absorbing element (2) on the one hand on the fixing element and on the other hand on the at least a deflection element (10, 20, 30', 30") outside the tool and inserting the structure preassembled in this way into the tool, IV - heating and introducing the in step IA provided granules (G) and injection molding or compression molding of the granules (G) within the tool to produce the positive mold of the base structural part (1) with the at least one belt-like force absorbing element (2) integrated into the base structural part (1). procedure after claim 12 , characterized in that the at least one belt-like force absorbing element (2) is pretensioned after step IIIa or step IIIb in the tool by at least one tensioning element belonging to the tool. procedure after claim 12 , characterized in that the temperature of the plastic material of the granules (G) according to step IV is selected such that the plastic material of the at least one belt-like force absorbing element (2) brought into the tool according to step IIIa or step IIIb in the hardened state at least partially is melted, so that a stationary material connection between the plastic materials of the base structural part (1) and the belt-like force absorbing element (2) is produced. procedure after claim 12 or 14 , characterized in that the same plastic material or different plastic material is used as the plastic material of the granules (G) and the belt-like force absorbing element (2).

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