Mechanism for making a shutter hinge

Abstract

Mechanism for manufacturing a flap hinge. The invention relates to a system for manufacturing an airbag channel sealing flap and a hinge formed by an overmolded reinforcing material (2). This system comprises: an injection mold (1) configured to receive and position a reinforcing material (2) at a portion (11) to form a hinge for the sealing flap; a protruding retaining means (12) fixed to the injection mold (1) for positioning the reinforcing material; a through-hole (21) carried by the reinforcing material (2) such that the insertion of the retaining means (12) into this hole positions a portion of the reinforcing material (2) in the portion (11) of the injection mold (1) dedicated to the hinge. The through-hole (21) comprises a first part and a second part with dimensions respectively larger and smaller than those of the retaining means (12) in cross-section. Figure to be published with the abbreviation: Fig. 4

Description

Title of the invention: Mechanism for making a shutter hinge

[0001] The present invention relates to the field of sealing flaps for airbag channels and their hinges forming a junction with the peripheral edge of the airbag channel and more particularly to the field of devices enabling the manufacture and production of such flaps and hinges.

[0002] During airbag deployment, it is common for the dashboard to tear along part of the edge of the flap, while one edge of the flap remains attached to the dashboard by a hinge. Given the significant force exerted by the deploying airbag against the flap, it is essential that the flap hinge remain sufficiently strong to ensure the flap remains attached to the dashboard and prevent uncontrolled movement or travel of the flap within the passenger compartment, or even prevent the flap from detaching from the dashboard.

[0003] To improve the resistance of a flap hinge to airbag deployment, one solution is to combine the injection-molded material used to form the flap and / or the dashboard with a reinforcing material, for example, a textile, positioned across the portion of the dashboard corresponding to this hinge. The reinforcing material is thus positioned inside the injection mold during the manufacture of the flap and / or the dashboard, so that it is overmolded by one or more injected materials used to produce the flap.However, to ensure the successful creation of a hinge combining a reinforcing material such as a textile and an injected overmolding material, it is necessary that, prior to the injection stage, the reinforcing material is perfectly positioned inside the injection mold and more specifically in the portion of the injection mold dedicated to the formation of this hinge.

[0004] It is common practice that, in the production of a dashboard or a flap by injection molding, the portion of the mold specifically dedicated to forming a hinge has, in a plane in cross-section perpendicular to the dashboard, a curved arrangement or one with one or more convolutions, which may present a hairpin or loop configuration. This portion of the mold is generally made by joining two complementary elements, namely a first element comprising a protruding arrangement and a second recessed element, complementary in shape to the first element, between which the reinforcing material is positioned. However, after the reinforcing material is positioned on one of the two elements, the bringing together of the two elements during the closing of the injection mold may cause accidental or unwanted displacement of the reinforcing material from its intended position in the portion of the mold dedicated to creating the hinge, or even deformation or distortion of its structure, for example, in the form of stretching or separation of part of its mesh. Similarly, this displacement may also occur during the injection step for overmolding the reinforcing material.

[0005] To overcome this problem, the most common solution is to place a sufficiently large reinforcing material inside the mold to cover the portion of the mold dedicated to the hinge and to extend beyond the hinge on either side, i.e., into the portions of the mold dedicated to the flap and / or the dashboard. Therefore, if the reinforcing material shifts, at least part of it remains in the portion of the mold dedicated to the hinge. Another solution involves using pairs of retaining elements positioned on each of the inner faces of the injection mold. These retaining elements are arranged opposite each other to work together to grip the reinforcing material, keeping it in position inside the injection mold.However, such a solution presents difficulties, particularly in terms of space, in its implementation at the level of the portion of the mold dedicated to the production of the hinge when this has a thin injection volume associated with several convolutions.

[0006] To circumvent this problem, one solution is to hold the reinforcing material inside the mold by means of one or more retaining elements shaped like needles or hooks and configured to pass through corresponding perforations in the reinforcing material. Inserting these retaining elements through perforations in the reinforcing material thus holds the reinforcing material securely in position inside the injection mold when the mold components are brought together. However, such a mechanism for securing the reinforcing material poses a risk of stress, deformation, distortion, or unwanted stretching of the reinforcing material during the closing of the injection mold, which could lead to weakening or tearing of the reinforcing material.Thus, after injection, the produced hinge is defective and is no longer able to meet the safety requirements imposed by the airbag deployment mechanisms.

[0007] The present invention aims to overcome this drawback by providing an easy-to-implement solution that allows the reinforcing material to be maintained in position at the level of the portion of the injection mold dedicated to the formation of a hinge of the sealing flap while retaining the flexibility of adaptation of the reinforcing material to the particular geometric shapes of the portion of the mold forming the hinge of the sealing flap in particular when closing the injection mold, this portion of the mold being likely to correspond to a narrow or confined area of ​​the mold which presents possible folds, twists or convolutions.

[0008] The invention relates to a system for embedding at least one airbag channel sealing flap and its hinge, the hinge combining a reinforcing material overmolded with the material of the sealing flap, characterized in that the system comprises: - an injection mold configured, at the level of a portion of its structure intended for the formation of a hinge of at least one sealing flap, to receive and position at least one reinforcing material, - at least one means of holding the reinforcing material in position inside the injection mold, this holding means being achieved by an element fixed to the injection mold and protruding from the inner surface of the injection mold, - at least one through-hole carried by the reinforcing material, this through-hole being positioned on the reinforcing material such that the insertion of at least one retaining means into the through-hole of the reinforcing material positions at least a portion of the reinforcing material at the level of a portion of the injection mold dedicated to the formation of a hinge of at least one sealing flap, at least one through opening comprising, on the one hand, a first part whose width or dimensions are greater than those of at least one means of retaining in section and, on the other hand, a second part whose width or part of the dimensions is less than the width or dimensions of at least one means of retaining in section.

[0009] The invention also relates to a product resulting from a system for making at least one airbag channel sealing flap and its hinge according to the invention, the product comprising at least one airbag channel sealing flap associated with a dashboard, made by combining a textile reinforcement material overmolded by the material of the sealing flap, characterized in that the reinforcement material comprises at least one through orifice having, on the one hand, a first part of substantially circular shape and, on the other hand, a second part of substantially rectilinear shape which communicates with the first part of the through orifice.

[0010] The invention further relates to a method of operating a system for implementing at least one airbag channel sealing flap and its hinge according to the invention, characterized in that the method comprises: - a step of positioning the reinforcing material on an element of the injection mold involving the insertion of at least one retaining means through the first part of the through-hole in the reinforcing material, - a step of closing the injection mold by bringing together at least two elements opposite the portion of the injection mold dedicated to forming a hinge of at least one sealing flap, - a step of moving the reinforcing material inside the injection mold under the effect of the tension exerted by at least two elements of the portion of the injection mold opposite each other on the reinforcing material, this movement effecting a sliding of at least one holding means from the first part to the second part of the orifice through the reinforcing material.

[0011] The invention will be better understood from the following description, which relates to preferred embodiments, given by way of non-limiting examples, and explained with reference to the accompanying schematic drawings, in which:

[0012] [Fig. 1] represents a schematic illustration of a reinforcing material incorporating a first example of a through hole,

[0013] [Fig.2] represents a schematic illustration of a reinforcing material incorporating a second example of a through-hole,

[0014] [Fig.3] represents a schematic illustration of a third example of an orifice crossing,

[0015] [Fig.4] represents a schematic illustration of an integration kinematic of reinforcing material in an example of a system of the invention for the realization of an airbag channel sealing flap and its hinge,

[0016] [Fig. 5] represents a schematic illustration of an example of a holding means including an arrangement which allows the association of a reinforcing material to be locked onto the retaining means.

[0017] The invention relates to a system for embedding at least one airbag channel sealing flap and its hinge, the hinge combining a reinforcing material 2 overmolded by the material of the sealing flap, characterized in that the system comprises: - an injection mold 1 configured, at a portion 11 of its structure intended for the formation of a hinge of at least one sealing flap, to receive and position at least one reinforcing material 2, - at least one means of holding the reinforcing material 2 in position inside the injection mold 1, this means of holding 12 being made by an element fixed to the injection mold 1 and protruding from the inner surface of the injection mold 1, - at least one through hole 21 carried by the reinforcing material 2, this through hole 21 being positioned on the reinforcing material 2 such that the insertion of at least one retaining means 12 into the through hole 21 of the reinforcing material 2 positions at least a part of the reinforcing material 2 at the level of a portion 11 of the injection mold 1 dedicated to the formation of a hinge of at least one sealing flap, the at least one through orifice 21 comprising, on the one hand, a first part 211 whose width or dimensions are greater than those of the at least one retaining means 12 in section and, on the other hand, a second part 212 whose width or part of the dimensions is less than the width or dimensions of the at least one retaining means 12 in section.

[0018] The system according to the invention is thus arranged to form an injection mold 1 adapted to interact, via a retaining means 12, with a reinforcing material 2 intended to be placed within the thickness of a hinge of an airbag channel sealing flap, and more particularly with a portion of the reinforcing material 2 which includes a specifically dimensioned through-hole 21. The interaction of the retaining means 12 with the through-hole 21 of the reinforcing material 2 achieves a cooperation that allows the reinforcing material 2 to slide relative to the retaining means 12 within the injection mold 1.This slippage of the reinforcing material 2 is thus likely to occur during the closing of the injection mold 1 by bringing together two elements of the mold 1 which are positioned opposite each of the faces of the reinforcing material 2 and, given the small internal volume of the mold 1 between these two elements intended to form an airbag flap hinge, are likely to exert tension on the reinforcing material 2. The controlled slippage of the reinforcing material 2 inside the injection mold 1, made possible by the cooperation of the retaining means 12 with the through orifice 21 of the reinforcing material 2, thus makes it possible, on the one hand, to maintain the positioning of the reinforcing material 2 at the level of the portion 11 of the injection mold 1 intended to form a hinge of the sealing flap and, on the other hand, to reduce the tension(s) likely to be exerted by elements of the mold 1 coming together on the reinforcing material 2.The reinforcing material 2 is thus able to be correctly positioned inside the injection mold 1 without risk of deformation or distortion of its structure and / or . its mesh, prior to the overmolding material injection operation in mold 1.

[0019] By way of construction example, the retaining means 12 protruding inside the injection mold 1 has a substantially rectilinear arrangement. This retaining means 12 can thus take the form of a pin, a needle, or a nail. According to an alternative embodiment, the end of the retaining means 12 located at a distance from the inner surface of the mold 1 which carries it has an arrangement 121 allowing the association of the reinforcing material 2 with the retaining means 12 to be blocked and thus avoids the risk of accidental separation of the retaining means 12 inserted through the through orifice 21 of the reinforcing material 2. By way of example, this arrangement 121 at the end of the retaining means 12 is made in the form of a localized variation, for example a reduction, of the cross-section of the retaining means 12 so as to form a notch or relief which carries a contact surface of the reinforcing material 2 on the retaining means 12.This arrangement 121 thus makes it possible to limit or reduce the slippage of the reinforcing material 2 along the length of the retaining means 12. Under the effect of its own weight, the reinforcing material 2 remains positioned at the reduced cross-sectional portion of the retaining means 12, particularly when this retaining means 12 has a principal axis oriented substantially horizontally. Therefore, the reinforcing material 2 positioned on the retaining means 12, on the one hand, exhibits limited slippage or a restricted amplitude of slippage along the retaining means 12, and in particular at its end, and, on the other hand, allows the retaining means 12 to move within the through-hole 21, in the plane of the reinforcing material 2.

[0020] The controlled sliding of the reinforcing material 2 inside the injection mold 1 is achieved in particular by moving the retaining means 12 through the through-hole 21 of the reinforcing material 2 along a translation axis mainly located in the plane of the reinforcing material 2 and / or perpendicular to the main axis of the retaining means 12. The retaining means 12 thus moves from a first part 211 of the through-hole 21, at which the retaining means 12 is inserted through the reinforcing material 2, to a second part 212 of the through-hole 21 which has a different arrangement and dimensions than the first part 211. This sliding of the reinforcing material 2 is thus achieved such that the reinforcing material 2 translates parallel to the surfaces of the two mold elements 1 positioned opposite each of the faces of the reinforcing material 2.

[0021] It should be noted that, within the framework of the cooperation of the retaining means 12 with the through orifice 21, the first part 211 of the through orifice 21 is dimensioned to allow facilitated insertion of the retaining means 12 into through this first part 211 of the through orifice 21. The dimensions of the second part 212 of the through orifice 21 differ from those of the first part 211 and are defined so as to allow a movement of the retaining means 12 towards this second part 212 only under the effect of a tension exerted on the reinforcing material 2, the sliding of the retaining means 12 towards this second part 212 of the through orifice 21 causing a deformation of at least a portion of the lateral edges of this second part 212 of the through orifice 21.

[0022] According to an example relating to a variant of the system construction according to the invention, at least one retaining means 12 is positioned on a portion of the injection mold 1 located outside the portion 11 of the mold 1 intended for forming the hinge of at least one sealing flap. This particular positioning of at least one retaining means 12 makes it possible to limit, or even avoid, obstruction of the small portion 11 of the internal volume of the mold 1 intended for producing an airbag flap hinge. Positioning at least one retaining means 12 outside a portion 11 of the mold 1 intended for forming a hinge also makes it possible to avoid any point of attachment or anchoring of the reinforcing material 2 at the level of its portion intended to be integrated into a sealing flap hinge.In this way, the reinforcing material 2 is able to slide easily to adjust its positioning at the level of the narrow portion 11 of the internal volume of the mold 1 intended for the production of a hinge and to avoid any tensions exerted by elements of the mold 1 positioned opposite each of the faces of the reinforcing material 2. .

[0023] According to an example relating to another embodiment of the system according to the invention, which can be combined with either of the previously detailed embodiments, at least one through-hole 21 is positioned at one end and / or one end edge of the reinforcing material 2. This particular positioning of the at least one through-hole 21 prevents weakening of the structure of the reinforcing material 2 in its central part, i.e., in the part intended to be integrated into a shutter hinge. This particular location of the through-hole 21 on the reinforcing material 2 also allows the reinforcing material 2 to be anchored, by its peripheral portion, to the inside of the injection mold 1, thus leaving a large central portion of the reinforcing material 2 free for integration into a shutter hinge.Thus, this large central portion free from any anchoring allows play in the positioning, under the effect of sliding, of the reinforcing material 2 inside the injection mold 1. Furthermore, when inside the injection mold 1, at least one retaining means 12 is arranged along a substantially horizontal axis and at the level of a portion of the mold positioned. above the portion 11 of the internal volume of the mold 1 which forms a hinge, the presence of at least one through orifice 21 in the periphery of the reinforcing material 2 allows this reinforcing material 2 to be associated with at least one retaining means 12 so that the reinforcing material 2 is held suspended with the central portion of its structure positioned opposite the portion 11 of the injection mold 1 intended for the production of a shutter hinge.

[0024] According to an example relating to another construction variant of the system according to the invention and capable of being combined with either of the variants detailed above, the system comprises at least one pair of holding means 12 in position at the level of the injection mold 1 to cooperate with a pair of through holes 21 carried by the reinforcing material 2, the pair of holding means 12 being positioned at the level of a portion of the injection mold 1 disposed on the same side with respect to the portion 11 of the injection mold 1 dedicated to the formation of the hinge.Such cooperation of reinforcing material 2 with holding means 12 which rely on at least one pair of interaction makes it possible to operate, on the one hand, an optimized anchoring of the reinforcing material 2 by one of its sides to holding means 12 of the injection mold 1 and, on the other hand, a spread arrangement of the two through holes 21 of the reinforcing material 2 so that the reinforcing material 2 is held extended inside the mold 1. Under these conditions, the extended holding of the reinforcing material 2 makes it possible to limit or even avoid any risk of parasitic or accidental folding of the structure of the reinforcing material 2 at the level of the portion 11 of the injection mold 1 dedicated to making a hinge when elements of the mold 1 positioned opposite each of the faces of the reinforcing material 2 are brought together at the time of closing the injection mold 1.

[0025] According to an example relating to another construction variant of the system according to the invention and capable of being combined with either of the variants detailed above, the at least one through orifice 21 comprises, on the one hand, a first part 211 of substantially circular shape and, on the other hand, a second part 212 of substantially rectilinear shape in relation to the first part 211 of the through orifice 21. According to this construction variant, the through orifice 21 has a two-part arrangement 211, 212 of easy-to-implement design in which the first part 211 is able to interact easily with a retaining means 12 of the injection mold 1 and a second part 212 also capable of cooperating with this retaining means 12 under the effect of a sliding displacement of the reinforcing material 2.This particular arrangement of the through orifice 21 is likely to have a shape similar to that of a needle, with a head corresponding to the first circular part 211 and connected to a body corresponding to the second straight part 212.

[0026] According to an example relating to another construction variant of the system according to the invention and capable of being combined with either of the variants detailed above, the first part 211 and the second part 212 of the through orifice 21 are separated by a tearable portion 213 of the reinforcing material 2. This tearable portion 213, positioned at the junction between the first part 211 and the second part 212 of the through orifice 21, makes it possible to maintain the positioning of the retaining means 12 at the level of the first part 211 of the through orifice 21, preventing accidental displacement of this retaining means 12 towards the second part 212 of the through orifice 21 in the absence of tension exerted against the reinforcing material 2.This tearable portion 213 is thus configured, on the one hand, to resist a tension corresponding to the sole weight of the reinforcing material 2 and, on the other hand, to tear or break only under the effect of a tension exerted against the reinforcing material 2 in particular by two elements of the mold 1 coming together at the level of each of the faces of the reinforcing material 2. By way of example, this tearable portion 213 may take the form of a weakened wire or mesh which makes a connection between the two lateral edges of the second straight part 212 of the through orifice 21, at the level of the junction between the first part 211 and the second part 212 of the through orifice 21.

[0027] According to an example relating to another construction variant of the system according to the invention forming an alternative to the construction variant previously described and capable of being combined with either of the variants previously detailed, the end of the second part 212 of at least one through orifice 21 is open on the first part 211 of the through orifice 21. According to this construction variant, the junction between the first part 211 and the second part 212 of the through orifice 21 is made in the form of a continuation of the recess of the through orifice 21.This arrangement allows for easy sliding of the retaining means 12 in the through orifice 21 from the first insertion part 211 to the second part 212, i.e. without effort under the effect of a tension exerted against the reinforcing material 2 in particular by two elements of the mold 1 coming together at the level of each of the faces of the reinforcing material 2. .

[0028] According to an example relating to another embodiment of the system according to the invention and capable of being combined with either of the previously detailed embodiments, the second part 212 of the through-hole 21 is positioned closer to the edge of the reinforcing material 2, and the first part 211 of the through-hole 21 is positioned closer to the portion of the reinforcing material 2 intended to be disposed at a portion 11 of the injection mold 11 dedicated to forming a hinge of at least one sealing flap. According to this embodiment, the through-hole 21 is positioned on the reinforcing material 2. according to an orientation that ensures the positioning of the central part of the reinforcing material 2 at the level of the portion 11 of the mold 1 specifically dedicated to the formation of a hinge, and that maintains this positioning despite a displacement of the reinforcing material 2 under the effect of a tension exerted by two elements of the mold 1 coming together. In the case of a positioning of the through-hole 21 in an orientation in which the second part 212 of the hole 21 is positioned closer to the edge of the reinforcing material 2, the displacement of the reinforcing material 2 results in a sliding of the retaining means 12 inserted in the first part 211 of the hole 21 towards the second part of the through-hole 21, and therefore in a bringing of the retaining means 12 towards the edge of the reinforcing material 2.Under these conditions, with the retaining means 12 positioned outside the portion 11 of the mold 1 specifically dedicated to the formation of a hinge, the sliding of the retaining means 12 inside the through orifice 21 under the effect of a displacement of the reinforcing material 2 limits, or even eliminates, any risk of displacement of the central part of the reinforcing material 2 outside the portion 11 of the mold 1 specifically dedicated to the formation of a hinge.

[0029] The invention also relates to a product resulting from a system for making at least one airbag channel closure flap and its hinge according to the invention, the product comprising at least one airbag channel closure flap associated with a dashboard, made by combining a textile reinforcement material 2 overmolded by the material of the closure flap, characterized in that the reinforcement material 2 comprises at least one through-hole 21 having, on the one hand, a first part 211 of substantially circular shape and, on the other hand, a second part 212 of substantially rectilinear shape which communicates with the first part 211 of the through-hole 21. The integration of a reinforcement material 2 incorporating a through-hole 21 as detailed is thus characteristic of the implementation of a system of the invention for making an airbag channel closure flap with its hinge.

[0030] According to an example relating to a construction variant of the product according to the invention, the second part 212 of the through orifice 21 of the reinforcing material 2 has an end positioned at the level of the first part 211 of the orifice 21. According to this construction variant, the through orifice 21 of the reinforcing material 2 has a shape substantially similar to that of a needle with a head which corresponds to the first circular part 211 of the orifice 21 and is connected to a body corresponding to the second straight part 212 of the through orifice 21.

[0031] According to an example relating to another construction variant of the product according to the invention, the second part 212 of the through-hole 21 of the reinforcing material 2 is arranged across the first part 211 of the hole 21. According to this variant of In the construction, the through orifice 21 of the reinforcing material 2 is arranged to allow the retaining means 12 inserted in the first part 211 of the orifice 21 to slide in two directions respectively opposite and oriented along the axis of the second straight part 212 across the first part 211 of the through orifice 21. Such a construction of the through orifice 21 thus allows the retaining means 12 to slide inside the through orifice 21 from the first part 211 of the orifice 21 without imposing a direction or sense on this sliding under the effect of the displacement of the reinforcing material 2 under tension between two elements of the injection mold 1 coming together.

[0032] The invention also relates to a method of operating a system according to the invention for producing at least one airbag channel sealing flap and its hinge, characterized in that the method comprises: - a positioning step of the reinforcing material 2 on an element of the injection mold 1 involving the insertion of at least one retaining means 12 through the first part 211 of the through orifice 21 of the reinforcing material 2, - a closing step of the injection mold by bringing together at least two elements opposite the portion 11 of the injection mold 1 dedicated to the formation of a hinge of at least one sealing flap, - a step of moving the reinforcing material 2 inside the injection mold 1 under the effect of the tension exerted by at least two elements of the portion 11 of the injection mold 1 opposite each other on the reinforcing material 2, this movement effecting a sliding of at least one retaining means 12 from the first part 211 to the second part 212 of the through orifice 21 of the reinforcing material 2.

[0033] Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings. Modifications remain possible, particularly with regard to the composition of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

Demands

1. A system for embedding at least one airbag channel sealing flap and its hinge, the hinge combining a reinforcing material (2) overmolded by the material of the sealing flap, characterized in that the system comprises: - an injection mold (1) configured, at a portion (11) of its structure intended for forming a hinge of at least one sealing flap, to receive and position at least one reinforcing material (2), - at least one means for holding the reinforcing material (2) in position inside the injection mold (1), this holding means (12) being made by an element fixed to the injection mold (1) and projecting from the inner surface of the injection mold (1), - at least one through orifice (21) carried by the reinforcing material (2),this through-hole (21) being positioned on the reinforcing material (2) such that the insertion of at least one retaining means (12) into the through-hole (21) of the reinforcing material (2) positions at least a portion of the reinforcing material (2) at the level of a portion (11) of the injection mold 1 dedicated to the formation of a hinge of at least one sealing flap, the at least one through-hole (21) comprising, on the one hand, a first part (211) whose width or dimensions are greater than those of the at least one retaining means (12) in section and, on the other hand, a second part (212) whose width or a part of its dimensions is less than the width or dimensions of the at least one retaining means (12) in section.

2. System for the realization of at least one airbag channel sealing flap and its hinge according to claim 1, characterized in that the at least one retaining means (12) is positioned at the level of a part of the injection mold (1) located outside the portion (11) of the mold (1) intended for the formation of the hinge of the at least one sealing flap.

3. A system for embedding at least one airbag channel sealing flap and its hinge according to one of the preceding claims, characterized in that at least one through hole (21) is positioned at one end and / or end edge of the reinforcing material (2).

4. A system for the embodiment of at least one airbag channel sealing flap and its hinge according to any one of the preceding claims, characterized in that the system comprises at least one pair of retaining means (12) in position at the level of the injection mold (1) to cooperate with a pair of through holes (21) carried by the reinforcing material (2), the pair of retaining means (12) being positioned at the level of a portion of the injection mold (1) disposed on the same side with respect to the portion (11) of the injection mold (1) dedicated to the formation of the hinge.

5. A system for embedding at least one airbag channel sealing flap and its hinge according to any one of the preceding claims, characterized in that the at least one through orifice (21) comprises, on the one hand, a first part (211) of substantially circular shape and, on the other hand, a second part (212) of substantially rectilinear shape in relation to the first part (211) of the through orifice (21).

6. System for the embodiment of at least one airbag channel sealing flap and its hinge according to any one of claims 1 to 5, characterized in that the first part (211) and the second part (212) of the through orifice (21) are separated by a tearable portion (213) of the reinforcing material (2).

7. System for the embodiment of at least one airbag channel sealing flap and its hinge according to any one of claims 1 to 5, characterized in that the end of the second part (212) of at least one through orifice (21) is open on the first part (211) of the through orifice (21).

8. A system for the embodiment of at least one airbag channel sealing flap and its hinge according to any one of the preceding claims, characterized in that the second part (212) of the through orifice (21) is positioned closer to the edge of the reinforcing material (2) and the first part (211) of the through orifice (21) is positioned closer to the part of the reinforcing material (2) intended to be disposed at the level of a portion (11) of the injection mold (1) dedicated to the formation of a hinge of at least one sealing flap.

9. Product resulting from a system for the embodiment of at least one airbag channel sealing flap and its hinge comprising the features of claim 5, the product comprising at least one airbag channel sealing flap associated with a dashboard, made by the combination of a textile reinforcement material (2) overmolded by the material of the sealing flap, characterized in that the reinforcement material (2) comprises at least one through orifice (21) having, on the one hand, a first part (211) of substantially circular shape and, on the other hand, a second part (212) of substantially rectilinear shape which communicates with the first part (211) of the through orifice (21).

10. Product according to claim 9, characterized in that the second part (212) of the through hole (21) of the reinforcing material (2) has an end positioned at the level of the first part (211) of the hole (21).

11. Product according to claim 9, characterized in that the second part (212) of the through hole (21) of the reinforcing material (2) is arranged across the first part (211) of the hole (21).

12. A method for operating a system for producing at least one airbag channel sealing flap and its hinge according to any one of claims 1 to 8, characterized in that the method comprises: - a step of positioning the reinforcing material (2) on an element of the injection mold (1) involving the insertion of at least one retaining means (12) through the first part (211) of the through-hole (21) of the reinforcing material (2), - a step of closing the injection mold by bringing together at least two opposite elements of the portion (11) of the injection mold (1) dedicated to forming a hinge of at least one sealing flap, - a step of displacing the reinforcing material (2) inside the injection mold (1) under the effect of the tension exerted by at least two opposite elements of the portion (11) of the injection mold (1) on the material of reinforcement (2),this displacement effecting a sliding due to at least one means of retention (12) from the first part (211), towards the second part (212) of the through orifice (21) of the reinforcing material (2).

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