WO2012072260A1 - Procédé et outillage pour fabriquer un élément de garniture d'habitacle et élément de garniture d'habitacle - Google Patents

Procédé et outillage pour fabriquer un élément de garniture d'habitacle et élément de garniture d'habitacle Download PDF

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Publication number
WO2012072260A1
WO2012072260A1 PCT/EP2011/006034 EP2011006034W WO2012072260A1 WO 2012072260 A1 WO2012072260 A1 WO 2012072260A1 EP 2011006034 W EP2011006034 W EP 2011006034W WO 2012072260 A1 WO2012072260 A1 WO 2012072260A1
Authority
WO
WIPO (PCT)
Prior art keywords
reinforcing layer
interior trim
tool
matrix material
trim part
Prior art date
Application number
PCT/EP2011/006034
Other languages
German (de)
English (en)
Inventor
Laurent Petit
Lothar Freytag
Pascal Heintzelmann
Jochen Klos
Original Assignee
Faurecia Innenraum Systeme Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Faurecia Innenraum Systeme Gmbh filed Critical Faurecia Innenraum Systeme Gmbh
Publication of WO2012072260A1 publication Critical patent/WO2012072260A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14631—Coating reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B29C2045/14122—Positioning or centering articles in the mould using fixed mould wall projections for centering the insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3038—Air bag covers

Definitions

  • the invention relates to a method for producing an interior trim part for a vehicle and a tool device for the production of an interior trim part and interior trim part.
  • Such methods and tool devices are basically known. They are used to make interior trim parts used in the
  • the interior trim parts serve to disguise structural installations of a vehicle, in particular the chassis concerning or parts of the A, B or C-pillar.
  • the area between the windscreen and the vehicle occupant, referred to as the instrument panel, is also covered by interior trim parts.
  • security devices for the passengers are provided.
  • such safety devices are installed in the form of airbags in the vehicles. Such airbags are used
  • the airbags are arranged, for example, as head airbags in the steering wheel or for the passenger of a motor vehicle above the glove compartment.
  • Other airbags such as knee airbags, side head airbags, so-called airbag curtains are known to secure the passengers.
  • the interior trim parts are formed by known methods such that they also cover airbag receiving spaces in which the folded airbags in a resting position waiting for their deployment. In case of use, these covers of the airbag receiving spaces must fold to the side, or tear, so that the airbag to unfold and when inflating in its securing position can be guided. It should be ensured that the parts of the interior trim parts which tear open or unfold in order to give the airbag the desired freedom of movement into the interior of a vehicle do not fly uncontrollably through the interior of a motor vehicle.
  • these interior trim parts are connected to other interior trim parts, so they are intercepted or held during the unfolding so to speak.
  • such connections have hinge functions, so that a folding over of the corresponding covering interior trim parts takes place in order to release the airbag receiving space.
  • Hinge areas correspondingly strong perform.
  • net-like reinforcing layers have been used, which from below in the transition region between the pop-up interior trim part and a static interior trim part, the hinge effect, or support, so that is prevented with greater certainty that the interior trim part through the passenger compartment of the motor vehicle flies.
  • a disadvantage of the known method is that such mats in a separate operation from below to the interior trim panel, or attached to two adjacent interior trim parts, in particular must be glued. This additional operation creates higher costs and a longer production time for an interior trim part.
  • a method according to the invention contains several advantages. On the one hand it is possible in this way that a reinforcing layer is provided, which is brought in the same operation in its function-determining position, in which the interior trim part is made. Interior trim panels are often manufactured by injection molding using liquid matrix material, so that a method according to the invention can be ideally coupled to an existing manufacturing process for the interior trim panel without the need for new tooling or longer manufacturing costs.
  • a further advantage of a method according to the invention is that, by inserting the reinforcing layer in a cavity formed between two tool parts, this reinforcing layer is introduced substantially into the interior trim part in a form-fitting manner.
  • the interior trim panel has a portion for covering the airbag accommodating space and a static portion that does not substantially move when the airbag accommodating space is opened. This can be unsightly shocks or grooves in the visual appearance of an instrument panel avoided or reduced.
  • For triggering an airbag can break points, or
  • Rupture lines or predetermined breaking surfaces may be provided in the interior trim panel, along which it ruptures by an inflating airbag and its pressure acting from behind on the interior trim panel, this.
  • the necessary hinging action for unfolding the interior trim panel to clear the path for the inflating airbag from the airbag containment space is provided by a substantially integral material bridge between a stationary portion of the interior trim panel and a moving portion that is at rest the airbag receiving space covers formed.
  • Transition region is advantageously arranged the reinforcing layer. This reinforcing layer thus reinforces this transition region as well
  • Hinge area can be designated, so that even a possibly caused by the high force when opening the airbag receiving space tearing of the interior trim part in the hinge region, no tearing of a part of the interior trim part can be done.
  • the moving portion of the interior trim panel remains in frictional contact with the remainder of the interior trim panel, at least over the reinforcing ply, and is secured against flying around in the passenger compartment of the motor vehicle.
  • Also advantageous when using a method according to the invention is that in this way a pinch of the reinforcing layer, or a pressure of the reinforcing layer is avoided to the contouring surface of the first tool part. In processes in which the injection of the liquid matrix material by the second tool device, that is, substantially perpendicular to the second surface of the reinforcing layer, this is from the incoming
  • Matrix material pressed against the contouring surface of the first tool part.
  • This pressure can be 1050 bar and more, in particular up to 3000 bar due to the high injection pressures used. Since it is preferred, one
  • reinforcing layer of a cost-effective, but stable material in particular a material which has sufficient flexibility to participate in the necessary hinge movement of the interior trim part, such a high pressure would cause a compression of the material of the
  • Reinforcement occurs.
  • such a reinforcing layer is compressed and fixed in the compressed form during cooling of the matrix material.
  • a relatively flexible material of a reinforcing layer by a known method loses at least a part of its functionality, which is necessary to produce the hinge effect.
  • Contouring surface of one of the two tool parts avoided. Rather, it is injected substantially tangentially to the reinforcing layer, so that no pressure is introduced substantially perpendicular to the contouring surfaces of the tool parts. Thus, neither a compression of the reinforcing layer, nor a shift to one of the contouring surfaces out.
  • the reinforcing layer is substantially completely within the Matrix material comes to rest.
  • the reinforcement layer is therefore essentially completely enclosed by matrix material by a method according to the invention. In this way, both above the second surface, as well as below the first surface of the
  • the introduction points have an insertion direction aligned with each other, which are directed substantially all in the same direction.
  • a common flow front of the flowable matrix material can be formed, which moves through the cavity and on the opposite side pushes out the previously contained in the cavity gas.
  • an orientation of the invention is at all places of introduction
  • the wall thickness of the interior trim part can be reduced, since the integral design of the matrix material and the reinforcing layer prevents increased protection against unwanted flying around a section of the interior trim part in the passenger compartment of a motor vehicle. Due to the advantageous central arrangement of the reinforcing layer in the interior of the matrix material, in particular by the spacing of the two outer sides of the matrix material of the interior trim panel is also prevented that the reinforcing layer is wholly or partially on one of the surfaces of the interior trim part. Such a marking is a great disadvantage, regardless of whether subsequently a lamination step, as has been described above, takes place. Namely, such a markup significantly reduces the optical quality. In addition, such is one
  • the formed cavity in a method according to the invention preferably has a thickness of about 2.5 mm plus / minus 0.5 mm.
  • the reinforcement layer itself has a thickness of approximately 1 mm, plus / minus 0.5 mm. This leaves at preferably centrally arranged arrangement of the reinforcing layer in the section about 0.75 mm on each side of the
  • Reinforcement layer as residual strength of the matrix material of the interior trim part, to prevent a sign of the reinforcing layer on the upper side of the interior trim part and also to give the possibility of additional lamination.
  • the cavity is advantageously not completely closed, but provided either with openings or with air outlet valves, which make it possible in the course of the injection process of the liquid matrix material in the cavity Let es escape gases. This is advantageous since in this way gas inclusions which would impair the material thickness or its optical quality are avoided.
  • Spacers which hold the reinforcing layer after placing on the first tool part and / or after placing the second tool part of at least one of the respective tool parts at a minimum distance from these.
  • spacers may be, for example, pins, noses or small foot-like elements, which define in this way the starting position of the reinforcing layer for the injection process.
  • the spacers are advantageously designed such that they have a very low geometric expression along the respective contouring surface compared to the reinforcing layer.
  • they are advantageously made of a material which is not or only slightly on the top of the
  • Interior trim part on which abut the spacers, would sign off. This can be made possible, for example, by a high flexibility of the spacers, which substantially matches the material properties of the flowable matrix material in its cooled state. It is therefore advantageous if the spacers from the same or a very similar
  • a method according to the invention becomes even more precisely definable through the use of spacers, so that the quality of the interior trim parts produced in this way is even further improved.
  • Reinforcement is fixed in a position in which the reinforcing layer is partially in a portion of the manufactured interior trim panel, which is intended to cover the airbag receiving space, and partially in a separate section.
  • the contouring surfaces of the tool parts not only provide the final shape of the interior Defined panel parts, but rather also the respective function of each section.
  • there is at least a portion of the interior trim panel which later serves to cover the airbag containment space and separate sections that cover static areas of, for example, an instrument panel. Between such sections advantageously runs
  • Reinforcing layer Such insertion according to the invention results in that the reinforcing layer extends over the two sections, so that the transition between the two sections is reinforced with the reinforcing layer. Exactly this transition between the two sections is called hinge area at
  • Portion of the interior trim part which covers the airbag accommodating space, relative to the static portions of the interior trim part, are used.
  • the hinge effect of this area is determined by the
  • the fixing takes place in an edge region of the reinforcing layer, which is arranged in the flow direction of the introduced liquid matrix material before the rest of the reinforcing layer and after the introduction of the liquid matrix material.
  • a fixation is performed in this way, which is defined locally even more precisely. The location of the fixation is downstream of the injection site, and the rest of the
  • Reinforcement layer is in turn downstream of the fixation.
  • a flow front of an introduced flowable matrix material will thus first reach the location of the fixation starting from the introduction site and proceeding slowly from there
  • the flowable matrix material will exert a force on the reinforcing ply directed in the direction of flow of the matrix material. In other words, the flowable matrix material tries to pull the reinforcing layer with it, which is different from the
  • Matrix material no change in the positioning of the reinforcing layer, in particular no compression or wrinkling of the reinforcing layer is generated, an arrangement according to the invention as described above is selected. In this way, the force is introduced only in one direction on the reinforcing layer, which is directed away from the location of the fixation of the reinforcing layer. In other words, the matrix material tries to pull the reinforcing layer away from the location, ie to stretch it. A reverse force direction, which would cause a compression of the reinforcing layer, is thus avoided. Thus, it is possible that the fixation of the reinforcing layer takes place only at a single point, and the
  • the reinforcing layer is fixed, but a variety of locations.
  • the fixation on a plurality of edge regions, in particular up to a fix around the reinforcing layer, is possible within the scope of the present invention.
  • At least one side of the produced interior trim part is laminated with a coating.
  • a coating can in particular improve the optical and / or haptic appearance of the interior trim part.
  • leather or synthetic leather or matrix material films which are adapted to the desired effect in the interior of a vehicle with regard to their appearance or their feel can be used as coatings.
  • multilayer laminations with multi-stage laminating are possible.
  • flexible, in particular foam-like layers on the Interior trim part are covered, which are covered with a leather, a synthetic leather or a matrix material layer. In this way, both the look and feel of the interior trim part are further improved.
  • the so-called B-side ie the back of the interior trim part, which lies invisible to the passenger in a motor vehicle, is laminated.
  • lamination to the airbag receiving space is possible, so that a surface on the B side of the interior trim part is achieved, which improves the functionality of the airbag.
  • a reduction in the friction of the airbag on the interior trim part should be mentioned, so that the inflation after the opening of the airbag receiving space is slowed to a lesser extent by friction and insbesondre the risk of tearing the airbag on a roughened B-side is avoided.
  • At least one reinforcing layer can have a reticular structure.
  • network-like structure is to be understood as meaning that the structure has, at least in sections, nodes between which reinforcement sections and empty sections in FIG.
  • Substantially regularly or at least partially arranged regularly are substantially regularly or at least partially arranged regularly.
  • the reinforcing layer is as a network, in particular as a fabric
  • Tissues have the great advantage that they as a network structure, ie as a reinforcing layer with very low weights and correspondingly favorable
  • Tensile load A force that wants to pull the fabric apart, ie a force that acts in an interior trim part around this one
  • At least one reinforcing layer is made of a material which forms itself
  • the material closure has the advantage that during the deformation of the interior trim part during the inflation process of the airbag no separation between the reinforcing layer and the matrix material can take place.
  • Power transmission between the matrix material and reinforcing layer is thus improved by an at least section-wise material-locking connection of the two materials.
  • Such an embodiment can be achieved, for example, in that both the matrix material and the material of the reinforcing layer are thermoplastic materials, while melting temperatures are in a similar range.
  • Melting temperature of the matrix material is equal to or greater than the melting range, or the melting temperature of the reinforcing layer. flowable
  • Matrix material which is thus injected above the melting range at high temperature, will release this temperature at least partially for heating the reinforcing layer to this and this also at least at their
  • Intersections or be achieved by pores in the reinforcement layer.
  • Reinforcement layers which in particular at least partially a
  • At least one material weakening is produced in a section of the interior trim part in the production of the interior trim part, in which no reinforcement layer is arranged.
  • the provision of material weakenings serves to create predetermined breaking lines or predetermined breaking points or predetermined breaking surfaces.
  • the weakening of the material is thus a region which, when force is exerted on the interior lining part, defines it in a defined manner along the interior surface
  • Material weakening can be torn. In this way, the Aufr eintician Maschinench and thus the subsequent movement of at least some portions of the interior trim panel relative to fixed portions of the interior trim panel can be previously defined.
  • the material weakenings are advantageously arranged in a region in which no reinforcing layer is provided.
  • the reinforcing layer itself thus reinforces an area which is also to be reinforced, while other areas without reinforcement remain deliberately unreinforced to serve as a tear-open area of a predetermined breaking point.
  • the arrangement of the material weakening can be designed differently. So it is possible that essentially a so-called
  • Orange peel opening is performed, which includes a material weakening substantially star-shaped expression. Also H-shaped embodiments of the material weakening are conceivable, so that essentially two large
  • Valve parts are formed, which open in the opposite direction to release the airbag-receiving space.
  • the material weakening can, for example, already by the appropriate shaping of contouring
  • Another object of the present invention is a tool device for the production of an interior trim part with a method according to the invention.
  • a tool device has a first tool part with a first contouring surface and a second tool part with a second contouring surface.
  • the second tool part can be arranged with the second contouring surface with respect to the first contouring surface of the first tool part, whereby a cavity can be formed between the two contouring surfaces of the tool parts.
  • At least one injection opening for liquid matrix material is provided, the injection direction of which extends at the location of the injection opening along the first and / or second contouring surface.
  • the injection opening may be either part of one of the two or both tool parts, or else be provided as a separate injection location, for example in the form of an injection nozzle.
  • a plurality of injection openings is provided, but preferably have a substantially same orientation with respect to their injection opening. By the same orientation along a common direction of the injection openings, it is possible that a substantially uniform front of the flowable matrix material is generated when injected into the cavity, so that gas contained in the cavity is pushed out of the cavity from the front.
  • openings are provided which are arranged at opposite ends of the injection opening with respect to the cavity. Such openings may also be arranged separately or else in one or both of the tool parts. These openings can also be coupled with valves, or valves can be arranged in the openings, which allow gas to escape from the cavity at a certain pressure. A backflow is through These valve corners, which are advantageously designed as pressure relief valves, not possible, so that a suction of air from the outside into the cavity is avoided.
  • a fixing device is provided in the region of the first contouring surface in order to fix a reinforcing layer at its arranged position.
  • a fixing device serves to hold the reinforcing layer during the injection process in a method according to the invention at the predefined position.
  • It can be designed in different ways.
  • the reinforcing layer is held in the desired position via a clamping device.
  • This clamping device may be formed separately from the tool parts or else integrally.
  • the provision of nose-shaped projections or pins that can pass through a reinforcing layer, so can be placed on a reinforcing layer are conceivable as a fixing device.
  • Such pins engage, for example, in the eyes of a net-like structure of the reinforcing layer and fix it at the desired position counter to the direction of flow of the introduced matrix material.
  • the fixing device is thus sufficiently configured if it allows a fixation at least in a single direction, namely against the flow direction of the introduced through the injection port flowable
  • At least one air outlet valve for the cavity is disposed at a position with respect to the cavity in which no reinforcing layer is inserted in carrying out the method according to the invention.
  • the exhaust valves for gas are spaced from the cavity from the inserted reinforcing layers. This is advantageous since the reinforcing layer even in the cavity already takes up space and thus displaces gas. The proportion of gas which has to be removed from the areas in which no reinforcing layer is present is accordingly larger, as seen by the volume of the reinforcing layer.
  • valves By disposing the valves at a distance from the regions with the reinforcing layer, it is prevented that a flow direction of the gas is generated during the outflow substantially perpendicular to the upper or first surface of the reinforcing layer. Rather, the gas which is present in the region around the reinforcing layer, when injecting the matrix material substantially along the upper and / or the first surface of the reinforcing layer must escape to after reaching the opening to the exhaust valves perpendicular to each contouring surface of the second tool part to escape from the cavity.
  • the flow direction in the region of the reinforcing layer is correspondingly defined along the upper and / or the first surface of the reinforcing layer, so that the flow of the gas does not hinder the centering of the reinforcing layer in the interior of the matrix material of the interior covering part.
  • an interior trim part comprising a flatly extending support part (1), wherein within the support part (11) a reinforcing layer (20) is located, which for holding an airbag flap portion (4) on one of these surrounding main area (5) of the interior trim part (10) in case of partially separating the connection area between the airbag flap area (4) and the main area (5) in an airbag expansion in the vehicle interior trim part (10) wherein the reinforcing ply (20) is located in the interior trim panel (10) with respect to the air bag flap region (4) such that the reinforcing ply (20) extends beyond the air bag flap region (4); so a first one
  • Connecting portion (20-1) of the reinforcing layer (20) in the main region (5) and a second connecting portion (20-2) of the reinforcing layer (20) in the airbag flap region (4) is located, wherein the reinforcing layer (20) along one of the physical extension of the interior trim panel (10) defining the first and a second surface (62a, 64a) of the interior trim panel (10) and extending from the first and a second surface (62a, 64a) throughout at least a fifth of the thickness of the interior trim panel (10) at the respective location of the spacing or at least of 0.3 mm has.
  • the interior trim part (10) has a carrier part (11) polypropylene or ABS.
  • the reinforcing layer (20) is formed and in particular consists of a polyester material which has a polymer matrix other than the base matrix material from which the reinforcing layer (20) surrounds Area of the support part (11) is formed.
  • the material of the reinforcing layer 20 has a melting point which is at least 20 degrees Celsius higher than that
  • the distance between a first surface 22 of the reinforcement layer 20 and the first upper side of the support part 11 located on the same side with respect to the reinforcement layer 20 and between a first surface 22 of the reinforcement layer 20 and the first upper side of the support part 11 located on the same side with respect to the reinforcing layer 20 at each point of the main section 20-0 is at least 0.3 mm in each case.
  • the interior trim part (10) is an instrument panel.
  • the base matrix material forms a carrier layer of the interior trim panel (10) and that a decorative layer is laminated thereon.
  • FIG. 1 is a cross-sectional view schematically of an embodiment of a built-in interior trim part
  • FIG. 2 is a schematic cross-section of an embodiment of a FIG
  • Tool device Figure 3 shows another embodiment of a tool device in
  • FIG. 4 is an isometric view of an embodiment of a
  • FIG. 6a shows a further embodiment of a reinforcing layer
  • FIG. 6b shows a further embodiment of a reinforcing layer
  • FIG. 7 shows an isometric view of an embodiment of a first tool part with applied reinforcing layers
  • FIG 8 shows a schematic representation of another embodiment of a second tool part in plan view.
  • Figure 1 is an embodiment of a schematic cross-section
  • Interior trim panel 10 or interior trim panel according to the invention in the position arranged in the motor vehicle.
  • Interior trim panel 10 is generally an interior trim panel that covers an airbag module 100 for deploying an airbag thereof or on which such an airbag module is disposed.
  • the airbag module 100 is mounted on a body frame or a body part, in which the airbag module can be housed or integrated.
  • FIG. 1 it can be seen that the interior trim part 10 extends over a region which partially covers an airbag receiving space 105. This portion of the interior trim panel 10 is displaced therefrom at the opening of the airbag 110 and ruptures
  • the covering section of the interior trim part 10 thus folds up to one or both sides, thus releasing the opening for the deploying airbag 110.
  • the interior trim part 10 may, as it is shown in the figure 1, in particular be an instrument panel.
  • the interior trim panel 10 may be a side door trim panel, which also has the function of covering an airbag module.
  • Be cowling which limits the footwell of the vehicle interior IR and is located in the knee area of on a corresponding seat such as the passenger seat in the interior IR and has the function to cover an airbag module.
  • a fairing-solid coordinate system is entered with: a longitudinal direction L, which in the installed state of the trim part along the planar extension W the windshield 200 extends, a depth direction T, transverse to the
  • FIG. 1 Also to be seen in Figure 1 is the corresponding arrangement with respect to the motor vehicle, as in the left upper end of the interior trim part 10 which can be seen in connection to the windshield 200.
  • the interior trim part 10 in particular its sections for covering the airbag receiving space 105, thus fold in the direction of the interior and / or in the direction of the windshield 200 of the motor vehicle.
  • the interior trim part 10 is formed from a carrier part 11 in which a reinforcing layer 20 or reinforcing mat is embedded to reinforce it, so that both side faces of a respective layer 11a, 11b of the carrier part are opposite to each other 11 are completely covered in particular.
  • a reinforcing layer 20 protrudes from the interior trim part 10, in particular if such edge section 25a is in order to hold the reinforcing layer 20 in the tool device 60 Injection process outside the cavity for insertion of the matrix material in a tool part 62, 64 pinch or fix.
  • the reinforcing layer 20 is thus or is in
  • the reinforcing layer 20 is completely or at least a main portion 20-0 surrounded by matrix material 40, wherein the reinforcing layer 20 does not necessarily have to be provided centrally, ie centrally in the interior of the matrix material 40.
  • the distance between a first surface 22 of the reinforcing ply 20 and the first upper side 12 of the support part 11 located on the same side with respect to the reinforcing ply 20 is between a second surface 24 of the reinforcing ply 20 and that with respect to the reinforcing ply 20 located on the same side second top 14 of the support member eleventh at least 0.3 mm at each point of the main section 20-0.
  • a decorative layer or cover layer or coating 50 (indicated only by a reference numeral in FIG. 1) can be used to improve the appearance and / or or the feel of the interior trim part 10 may be attached, which is preferably carried out according to the injection molding process according to the invention in a laminating process. This is in particular fixed by gluing or fusing with the interior trim part 10 with this. It can be provided on the Kaschierseite of the support member 10, a laminating binder or laminating adhesive is applied.
  • the laminating binder can in particular a
  • Dispersion adhesive a solvent or a hot melt adhesive or be formed from one or more of these agents.
  • the decorative layer 16 may be formed from one or more layers and is
  • the decorative layer can be provided in particular to feel properties of the end product or the
  • the decorative layer is formed in two layers. In the formation of the decorative layer of two or more than two layers, the decorative layer, a cover layer and a seen from the visible side underlying
  • the cover layer is made of PVC or TPO or a combination of these materials and the foam layer is made of PVC, PP, PE, a soft polyester insert layer or a combination of these materials.
  • foam based on polyurethane (PU) can be used for the foam layer.
  • the decorative layer a Composite of textile materials, a foam and a non-woven material.
  • Plastic film or a leather can be used. These materials may be a single layer of the decorative layer or a cover layer of a multilayer
  • Forming decorative layer When using a textile fabric as a decorative layer can be used as starting material, the textile scrim or a film or a combination of the two.
  • the cover layer may have a thickness of 0.3 mm to 0.7 mm and the foam layer may have a thickness of 0.7 mm to 2.5 mm.
  • the reinforcing layer 20 may in particular be formed as a net or as a film and in this case as a continuous continuous film without recesses or as a film with a plurality of recesses.
  • the reinforcing layer 20 can also be formed from a plurality of at least one film and / or at least one net.
  • the reinforcing layer 20 may in particular be formed substantially rectangular and have edge lengths between 100 mm and 500 mm.
  • the reinforcing layer 20 preferably has a thickness of between 0.5 mm and 1.5 mm.
  • the thickness of the support member 11 is between 1, 7 mm and 2.5 mm, while the thickness of the reinforcing layer 20 between 0.7 mm and 1, 5 mm and the distances between the first or second surface 22 and 24 of the reinforcing layer 20 and located with respect to the reinforcing layer 20 on the same side top 12 and 14 of the
  • Support member 11 each be at least 0.3 mm.
  • an interior trim part 10 is provided, which is formed from a base matrix material.
  • the matrix material is in particular a plastic with a polymer matrix. It can be provided in particular that from the base matrix material, in particular a carrier part of the interior trim part is produced.
  • the carrier layer used for the device according to the invention and the method according to the invention is a carrier part which is produced on the basis of an injection molding process. In this case, provision may be made in particular for the carrier part to rest on the first tool part 2 in a dimensionally stable or cooled state in a first step following the injection molding process.
  • plastic material for example, polypropylene, hereinafter also referred to as "PP", a mixture of PP and EPDM (PP / EPDM T20), ABS (acrylonitrile-butadiene-styrene copolymer plastic), ABS PC (ABS with polycarbonate portions) or PA
  • Glass fibers, plastic material or wood fiber material or a metal can be used.
  • Reinforcement layer 20 which is for holding an airbag flap portion 4 at a surrounding main portion 5 of the interior trim part 10 in the case of a partial separation of the connecting portion between the airbag flap area 4 and the main area 5 in an airbag expansion in the in the vehicle built-in interior trim part 10 is provided.
  • Reinforcement ply 20 is located in the interior trim panel 10 with respect to the air bag flap region 4 such that the reinforcing ply 20 extends beyond the air bag flap region 4 such that a first connecting portion 20-1 of the reinforcing ply 20 in the main area 5 and 5 a second connecting portion 20-2) of the reinforcing layer 20 is located in the airbag flap portion 4.
  • Reinforcement ply 20 extends along a first and second surface 62a, 64a of interior trim panel 10 defining the physical extent of interior trim panel 10 and spaced at least a fifth of the thickness of the interior space from first and second surfaces 62a, 64a Clothing part 10 has at the respective point of the distance.
  • the physical extent of the interior trim part 10 extends along the longitudinal direction L and the depth direction T.
  • the base matrix material may in particular be formed and in particular consist of polypropylene and the reinforcing layer 20 may consist of a
  • Polymer matrix has as the base matrix material. Furthermore, it can be provided that the material of the reinforcing layer 20 has a melting point which is higher by at least 20 degrees Celsius than the melting point of the base matrix material.
  • the base matrix material may form a carrier layer of the interior trim panel 10. Furthermore, it can be provided that a decorative layer is laminated on this.
  • FIG. 2 shows a first embodiment of a device according to the invention
  • This tool device 60 has a first tool part 62 and a second tool part 64.
  • Each of these tool parts 62 and 64 has a contouring surface 62a and 64a, which reproduce the contour of the interior trim part 10 to be produced in a complementary manner.
  • the tool device 60 is already in a closed state, ie in a state in which the
  • Reinforcement layer 20 is inserted, and the second tool part 64 is disposed with its contouring surface 64 a opposite the reinforcing layer 20.
  • the cavity 66 is formed between these two tool parts 62 and 64. In this cavity, the reinforcing layer 20 is located.
  • the embodiment of the tool device 60 shown in FIG. 1 has a first tool part 62, which is designed in two parts, in particular to form a clamping device 70 in the form of a groove between these parts, into which the edge section 25a can be inserted, so that the reinforcing layer 20 during the injection process relative to the tool parts 62, 64 is held.
  • a groove 71 is formed, which in the contouring surface 62 a of the first tool part 62, a fixing device 70 for the
  • Reinforcement layer 20 forms.
  • the reinforcing layer 20 is inserted in its edge portion in this fixing device 70, ie in this groove and jammed in this groove.
  • the injection opening 68 of the tool device 60 is in the flow direction of an introduced flowable matrix material 40 upstream of the
  • Fixing device 70 located so that the force of the flowing
  • Matrix material 40 can act on the reinforcing layer only downstream of the fixing device 70 on the reinforcing layer 20. In other words, the
  • Reinforcement layer 20 during the injection process exclusively stretched and not compressed, so that wave formation or a folding or a drape of the reinforcing layer 20 can be avoided.
  • the embodiment of the tool device 60 shown in FIG. 2 has a clamping device 70 in the form of elevations or clamping parts 72, 74 which are formed on the tool parts 62 and 64, as pieces attached thereto or as integral parts with the respective tool parts 62 and 64 trained parts.
  • the parts 72, 74 are designed in such a way that the mutually facing end surfaces thereof approach each other during the movement of the tool parts such that they pinch the edge portion 25a (FIG. 3), so that in this state
  • Reinforcement layer 20 is held during the injection process relative to the tool parts 62, 64.
  • Interior trim part 10 is to be formed.
  • the cavity 66 is narrowed by an extension on the first tool part 62, so that its thickness is reduced during injection of the flowable matrix material 40 at this point.
  • a material weakening 12 ie a predetermined breaking line, or a predetermined breaking point, or a predetermined breaking surface is formed.
  • the reinforcement layer 20 is connected in its edge section to the fixing device 70, so that a fixation in the flow direction of the injected flowable matrix material 40 and
  • Tool part 64 is placed so as to complete the tool device that the contouring surface 64 a of the second tool part 64 substantially relative to the reinforcing layer 20 with respect to the upper side 24 comes to rest. As a result, a cavity 66 is formed between the two tool parts 62 and 64, in which the reinforcing layer 20 is located.
  • Matrix material 40 is introduced into the cavity 66 through the injection opening 68, so that the flowable matrix material can be distributed in the cavity 66.
  • the injection openings 68 are all formed substantially rectified, so that the injection direction of all injection openings 68 is substantially equal. In this way, a common flow front of the flowable matrix material is formed, which flows through the cavity 66 and thereby the
  • Reinforcement surrounds and simultaneously displaces gas contained in the cavity 66.
  • the gas contained in the cavity 66 can either escape at the other end of the cavity 66, shown at the bottom right in FIG. 2, or escape from the cavity 66 through openings, not shown, in particular with valves
  • Reinforcement layer 20 spaced from both sides of the interior trim part 10 on.
  • the reinforcing layer 20 is arranged substantially centrally in the interior of the interior trim part 10.
  • the reinforcing layer 20 is guided over both portions of the interior trim part 10, namely the portion which is provided to cover the airbag receiving space 105, as well as at least one other portion, ie a portion which at the opening of the airbag 110th remains in the static position while the covering portion of the interior Trim panel 10 moves relative to the static portion of the interior trim panel 10, or rotated to it.
  • the reinforcing layer 20 thus forms a hinge function in this way, or supports the hinge function of the transition region between these two sections.
  • Tooling device 60 such that a first surface 22 of one of the at least one reinforcing layer 20 of the first contouring surface 62 a is present,
  • Reinforcement layer 20 and the second contouring surface 64 a an upper Kavticians fundamental Scheme 66 a forms, wherein after closing the
  • Tool device 60 a first edge portion 25a on a formed on at least one tool part 62, 64 fixing device 70 against movement of the reinforcing layer 20 along the first konturradeden
  • Surface 62a is held in a direction 62b, which extends from the fixing device 70 in the direction of the flat extent of the reinforcing layer 20 to a second edge portion 25b opposite to the first edge portion 25a, wherein the first edge portion 25a of
  • the first end 66-1 of the cavity seen in the depth direction opposite from the end has a minimum distance, so that a partial space between the first end 66-1 and the edge portion is formed introducing flowable or liquid matrix material 40 into a front cavity intermediate region 67 of the cavity 66 of the closed cavity formed between the first or second tool part 62, 64, by means of an injection channel 30 arranged in the first or second tool part 62, 64
  • Tooling device 60 wherein the shortest distance between the orifice 67a and the nearest location of the reinforcing layer 22 is greater than ten times the maximum width of the orifice 67a,
  • an injection channel 30 is registered, which is formed in the second tool part 64 and opens out via an orifice 67a with a Ausmündungsquerrough on the second contouring surface 64a.
  • the injection direction is shown with an arrow provided with the reference symbol E1.
  • the injection channel 30 is formed in the first tool part 62 and opens out via a corresponding orifice (not shown) with an outlet cross-section at the first contouring surface 62a.
  • the first end 66-1 of the cavity 66 is the mouth of an injection channel (not shown).
  • the injection direction is shown in FIG. 2 with an arrow provided with the reference symbol E2.
  • a predetermined tear groove formed at least in sections is produced, in particular, by means of lasers or drilling, which runs in such a way that it at least partially delimits an airbag flap region 4 with respect to a main region 5 which produces an airbag in the manufactured interior trim part 10 Flap, wherein the reinforcing layer 20 with respect to the airbag flap region 4 in the
  • Interior trim panel 10 is located that the reinforcing layer 20 extends beyond the airbag flap portion 4, so that a first connecting portion 20-1 of the reinforcing layer 20 in the main area 5 and another Connecting portion 20-2 of the reinforcing layer 20 is located in the airbag flap area 4.
  • At least one of the at least one reinforcing layer 20 is provided on its first surface 22 with spacers 26, which are the first
  • the surface 22 of the reinforcing layer 20 is kept at a minimum distance from the same and / or at least one of the at least one reinforcing layer 20 is supported on its second surface 24
  • Spacers 26 is provided, which hold the reinforcing layer 20 after placing on the first tool part (62) and / or after placing the second tool part 64 of the respective tool part 62, 64 in a minimum distance.
  • FIG. 3 shows a further embodiment of a tool device 60.
  • This tool device 60 differs from the tool device 60 of FIG. 2 in that the first tool part 62 can be made simpler, namely, in particular, in one piece.
  • the fixing device 70 of the embodiment of FIG. 3 has a nose-shaped extension, which protrudes essentially as a nose or as a pin through the reinforcing layer 20.
  • this nose can thus protrude through the openings of the fabric or the network and provide a fixation of the matrix mat against forces in the direction of flow of an introduced matrix material 40.
  • the tool device 60 of FIG. 3 corresponds to the embodiment as shown in FIG. In particular, a method according to the invention is carried out in the same way. Also in this embodiment, a
  • FIG. 4 shows an embodiment of a reinforcing layer 20 according to the invention.
  • This is a section of a reinforcing layer 20, wherein a very fine network structure with large openings is present in this reinforcing layer 20.
  • the network structure becomes formed by substantially perpendicular to each other fabric threads which are interconnected at nodes.
  • the connection need not necessarily be material-locking, but can also be done by interweaving the individual trajectories of the network.
  • spacers 26 are provided, which are arranged substantially at the nodes of the network structure.
  • spacers 26 may be at each node, but need not be provided at each node. Thus, it is possible that, for example, shown in Figure 5, only at some nodes, or even on some network lines even the spacers 26 are provided.
  • the attachment of the spacers 26 can take place either by integral formation with the reinforcing layer 20 or by welding or gluing the same to the reinforcing layer 20.
  • the material of the spacer 26 is advantageously chosen so that it does not haptically or visually appear after the completion of the interior trim panel 10 on the surface. This can be achieved by, for example, forming a particularly flexible material which has little or no effect on the material of the material in terms of feel and / or appearance
  • Matrix material 40 is different. In particular, similar or identical materials are therefore used for the spacers 26 and the matrix material 40.
  • Figures 6a and 6b show further alternative embodiments of a
  • Reinforcing layer 20 In these embodiments of the reinforcing layer 20, the reticulated structures are made significantly wider with accordingly combined with smaller openings. In other words, the free spaces between the individual network lines are significantly smaller and, in the case of FIG. 6a, have a substantially circular or elliptical one and, in the case of FIG. 6b, a substantially one
  • FIG. 7 is an isometric view of an embodiment of a first embodiment
  • Tool part 62 shown.
  • a plurality of reinforcing layers 20 can also be used.
  • three of reinforcing layers 20 can also be used.
  • Reinforcement layers 20 are provided, which are all already arranged on the contouring surface 62 a of the first tool part 62. Since it is the first
  • Tool part 62 of the embodiment of FIG. 7 is a first tool part 62, as has already been explained with reference to FIGS. 2 and 3, a fixing device 70, not shown in FIG.
  • Fixing all reinforcing layers 20 performs in its edge region 20a.
  • the fixation is advantageously achieved by the contouring surface itself, for example by a detent recess for clamping or an increase to engage in the reinforcing layer 20.
  • air outlet valves 65 are provided in the openings, which can deliver air from the cavity 66 to the surroundings of the tool device 60. By introducing matrix material 40 into the cavity 66, air contained therein is pressurized or displaced from the cavity 66.
  • Air outlet valves 65 this displacement takes place in a defined manner, so that the type of displacement, the maximum internal pressure in the cavity 66 and the direction of the air flow can be defined in the displacement of the air.
  • Sections of the second tool part 64 are provided, which correlate with the cavity 66 such that they are spaced from the inserted reinforcing layers 20, which are shown as a dashed line in Figure 8. This ensures that gas which is located around the reinforcing layers 20 in the cavity 66, not perpendicular to the bottom 22 or top 24 of the reinforcing layers 20 can be displaced. Rather, the gas therein must first flow along the lower and / or second surfaces 22, 24 of the reinforcing ply 20 until it reaches the outlet port and the air outlet valve 65 which is closest. It is only at this point that the flow can turn perpendicular to the contouring surface 64a of the second tool part 64 and leave the cavity 66 through the air outlet valve 65. This ensures that the air flow, which also exerts a force on the reinforcing layer 20 by frictional forces, does not move this force in the direction of one of the contouring surfaces 62a or 64a of FIG.
  • Tool parts 62 or 64 causes. This further ensures that even by the air friction, a misplacement of the reinforcing layer 20 from the desired position in the interior of the matrix material 40 of the interior trim part 10 is prevented.
  • each have a closing device 63 is formed, which are each formed of end pieces 62, 64c of the respective tool parts 62, 64 and the closing of the cavity 66 to each other Plant come when the tool parts 62, 64 in their

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un procédé pour fabriquer un élément de garniture d'habitacle d'un véhicule et un outillage pour fabriquer un élément de garniture d'habitacle ainsi qu'un élément de garniture d'habitacle.
PCT/EP2011/006034 2010-12-01 2011-12-01 Procédé et outillage pour fabriquer un élément de garniture d'habitacle et élément de garniture d'habitacle WO2012072260A1 (fr)

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DE201010053106 DE102010053106A1 (de) 2010-12-01 2010-12-01 Verfahren und Werkzeugvorrichtung zur Herstellung eines Innenraum-Verkleidungsteils
DE102010053106.5 2010-12-01

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WO2012072260A1 true WO2012072260A1 (fr) 2012-06-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020112790A1 (de) 2020-05-12 2021-11-18 HEYCO IML Kunststofftechnik GmbH & Co. KG Herstellung eines Radoms für ein Kraftfahrzeug
US11498510B2 (en) 2018-06-22 2022-11-15 Dalphi Metal Espana S.A. Airbag unit, more particularly head side airbag

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Publication number Priority date Publication date Assignee Title
FR3018722B1 (fr) * 2014-03-19 2016-03-25 Faurecia Interieur Ind Procede pour realiser un panneau de vehicule destine a recouvrir un module de coussin gonflable

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DE4126183A1 (de) * 1990-08-09 1992-02-13 Toyoda Gosei Kk Prallkissen fuer eine vorrichtung mit einem luftsack
JPH0592442A (ja) * 1991-10-02 1993-04-16 Showa Jushi Kako Kk プラスチツク厚肉成形品の射出成形方法
JPH05329878A (ja) * 1992-05-29 1993-12-14 Toyoda Gosei Co Ltd エアバッグ装置のパッドの製造方法
US5427408A (en) * 1991-11-13 1995-06-27 Toyoda Gosei Co., Ltd. Air bag device and method of molding a pad portion thereof
EP0748722A2 (fr) * 1995-06-16 1996-12-18 Toyoda Gosei Co., Ltd. Elément de finition intérieure pour une automobile comportant un dispositif à sac gonflable et son procédé de fabrication
US6524505B1 (en) * 1997-01-20 2003-02-25 Allibert Industrie Method for making a finished part comprising a zone for providing a passage
WO2005049391A1 (fr) * 2003-11-20 2005-06-02 Intier Automotive Interiors Ltd. Appareil et procede de positionnement d'un materiau de renforcement dans un panneau de garniture interne
WO2005090048A1 (fr) * 2004-03-15 2005-09-29 Magna Kansei Limited Procede de moulage d'une piece
DE102004063224A1 (de) * 2004-12-22 2006-07-13 Faurecia Innenraum Systeme Gmbh Airbagabdeckung mit integrierter Airbagklappe
WO2008134062A1 (fr) * 2007-04-30 2008-11-06 E. I. Du Pont De Nemours And Company Renforcement structural de thermoplastiques
US20100109298A1 (en) * 2006-10-13 2010-05-06 Ferrari S.P.A. Interior trim for a motor vehicle integrating a lid for an airbag
DE102010023034A1 (de) * 2010-06-08 2011-12-08 Faurecia Innenraum Systeme Gmbh Dekorteil mit Verstärkungsvorrichtung

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Publication number Priority date Publication date Assignee Title
DE4126183A1 (de) * 1990-08-09 1992-02-13 Toyoda Gosei Kk Prallkissen fuer eine vorrichtung mit einem luftsack
JPH0592442A (ja) * 1991-10-02 1993-04-16 Showa Jushi Kako Kk プラスチツク厚肉成形品の射出成形方法
US5427408A (en) * 1991-11-13 1995-06-27 Toyoda Gosei Co., Ltd. Air bag device and method of molding a pad portion thereof
JPH05329878A (ja) * 1992-05-29 1993-12-14 Toyoda Gosei Co Ltd エアバッグ装置のパッドの製造方法
EP0748722A2 (fr) * 1995-06-16 1996-12-18 Toyoda Gosei Co., Ltd. Elément de finition intérieure pour une automobile comportant un dispositif à sac gonflable et son procédé de fabrication
US6524505B1 (en) * 1997-01-20 2003-02-25 Allibert Industrie Method for making a finished part comprising a zone for providing a passage
WO2005049391A1 (fr) * 2003-11-20 2005-06-02 Intier Automotive Interiors Ltd. Appareil et procede de positionnement d'un materiau de renforcement dans un panneau de garniture interne
WO2005090048A1 (fr) * 2004-03-15 2005-09-29 Magna Kansei Limited Procede de moulage d'une piece
DE102004063224A1 (de) * 2004-12-22 2006-07-13 Faurecia Innenraum Systeme Gmbh Airbagabdeckung mit integrierter Airbagklappe
US20100109298A1 (en) * 2006-10-13 2010-05-06 Ferrari S.P.A. Interior trim for a motor vehicle integrating a lid for an airbag
WO2008134062A1 (fr) * 2007-04-30 2008-11-06 E. I. Du Pont De Nemours And Company Renforcement structural de thermoplastiques
DE102010023034A1 (de) * 2010-06-08 2011-12-08 Faurecia Innenraum Systeme Gmbh Dekorteil mit Verstärkungsvorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11498510B2 (en) 2018-06-22 2022-11-15 Dalphi Metal Espana S.A. Airbag unit, more particularly head side airbag
DE102020112790A1 (de) 2020-05-12 2021-11-18 HEYCO IML Kunststofftechnik GmbH & Co. KG Herstellung eines Radoms für ein Kraftfahrzeug

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