Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
  • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
  • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
  • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
  • B60R21/217—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
• • 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
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
  • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
  • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
• • 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
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
  • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
  • B29C66/52—Joining tubular articles, bars or profiled elements
  • B29C66/522—Joining tubular articles
  • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
  • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
  • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
  • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
  • B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
  • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
  • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
  • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
  • B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
  • B60R21/262—Elongated tubular diffusers, e.g. curtain-type
• • 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
  • B29L2022/00—Hollow articles
  • B29L2022/02—Inflatable articles
  • B29L2022/027—Air bags
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
  • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
  • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
  • B60R21/23—Inflatable members
  • B60R21/235—Inflatable members characterised by their material
  • B60R2021/23571—Inflatable members characterised by their material characterised by connections between panels
  • B60R2021/2358—Bonding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
  • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
  • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
  • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
  • B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
  • B60R2021/2612—Gas guiding means, e.g. ducts

Definitions

• the invention relates to an airbag assembly according to the preamble of patent claim 1 and a method for producing such an airbag assembly.
• a hose or other filling means one end of which is connected to a gas source, airtight and permanently connected to its other end with a gas bag. This is ideally done with simple means and with resistance to manufacturing tolerances.
• the problem of avoiding leaks in the connection of a gas source with a gas bag is also present in other air bags, for example, in airbags of a standard airbag system.
• technical solutions such as hoses, pipes, flanged or retracted gas generators, diffusers and similar components can be connected to a gas bag without leakage.
• the present invention is accordingly an object of the invention to provide an airbag assembly that allows a gas-tight connection of a filling with a gas bag in a simple manner and with resistance to manufacturing tolerances. Furthermore, a method for producing such an airbag arrangement is to be provided.
• the solution according to the invention is characterized in that a filling agent, for example a filling hose, a filling tube or a gas generator, is elastically held in an opening of a gas bag by an elastic holding means which is arranged in the region of this opening in the gas bag.
• the holder is made by applying elastic holding forces on the filling by the holding means.
• the holding means may in particular be designed as an adhesive and / or be provided in the form of an elastomer.
• an adhesive eg silicone
• due to these elastic properties is suitable for exerting holding forces on a filling agent.
• the adhesive at least partially surrounds the filling means and exerts holding forces on the filling means in the radial direction. Due to the elastic properties of the adhesive, the compound is also airtight and durable.
• the force of the enclosing adhesive surfaces on the filling means provides for a relatively high frictional force connection, so that the filling means can be pushed out or pulled out of the connection neither by internal pressure nor by externally acting tensile forces.
• the longer the portion of the filling means which the adhesive encloses the higher the bonding force between the filling agent and the adhesive.
• the gas bag can define an interior space which can be filled with gas to inflate the gas bag.
• the opening of the gas bag, in which the Behellstoff is arranged, can provide a connection of the interior of the gas bag with an outer environment of the gas bag.
• the adhesive is provided in one embodiment of the invention by at least one adhesive track, which is arranged between two or more gas bag layers of the gas bag. Such an adhesive track thus connects at least two gas bag layers of the gas bag.
• the use of such adhesive traces for connecting two gas bag layers is known per se.
• the solution according to the invention makes use of the fact that such an adhesive trace taken on its own (with a corresponding opening in it) or two adjacent traces of adhesive forming an insertion channel between them, are capable of exerting elastic forces on an elongate filling agent, which is caused by a Adhesive trace or is pushed into a trained between two adjacent adhesive traces insertion channel.
• the diameter of the filling means is dimensioned such that when pushed through an adhesive trace or when inserted into an insertion channel, the holding or adhesive is widened and forced outwards, so that it in the radial direction holding forces on the Filling agent exercises.
• the filling agent is elastically held in a connection region of the gas bag by the holding or adhesive.
• a connection area is provided, for example, by a trunk, which is substantially rectangular in the flat spread state of the gas bag, the two longitudinal edges of the trunk each having an adhesive trace, which define an insertion channel between them.
• the adhesive is, for example, silicone.
• silicone as an adhesive is advantageous because the extensibility of silicone can be very pronounced and is for example 1000% or even higher, i. H.
• the silicone material can be pulled to ten times its size until it breaks.
• other adhesives having elastic properties can also be used.
• the elastic holding forces which the holding or adhesive agent exerts on the filling means, so that the filling means is held in the opening of the gas bag, can lead to a frictional retention of the filling means in the opening.
• the holder of the filling in the opening of the gas bag can be carried out by the elastic holding forces of the holding means, without causing an adhesive bond between the filling and the airbag assembly, in particular the adhesive consists.
• the invention further provides a method for producing an airbag assembly.
• the method comprises the steps:
• Adhesive provided by a cured adhesive trace
• the elastic holding force is provided by an elastically deformable insertion channel, which is formed by at least one adhesive track. It is thus defined with the adhesive, a channel for the filling. Upon insertion of the filling in this channel, the adhesive is displaced and thereby exerts an elastic holding force on the filling.
• adhesive is displaced at least one adhesive track by the introduction of the filling from its original position. Due to the elastic properties of the adhesive this tries to return to its original position and thereby exerts an elastic holding force on the filling.
• one embodiment of the invention provides that the filling agent is pushed through an adhesive track.
• This can be done according to a first method method in that the filling is pushed through a located between two or more gas bag layers closed and already cured adhesive track.
• the thus displaced radially outward adhesive encloses the enclosed object and seals the compound on its elastic properties airtight and durable.
• the enclosing force on the enclosed object also ensures a high frictional connection, so that the filling means can neither be pushed nor pulled out of the connection by the internal pressure nor by external pulling forces.
• the pushing of the filling agent through the adhesive track thus takes place without any incision or the like being made previously in the adhesive track. Rather, this tears in the middle when pushing the filling agent through the adhesive track, wherein the adhesive is pressed concentrically outward Shen.
• a mandrel or the like is arranged on the end face of the filling means, which simplifies the passage of the filling agent through the adhesive track.
• a thorn can after finished placement of the Behellstoffs be removed again, for example by pulling the mandrel over a hollow cylinder of the filling.
• the filling agent is also pushed through an adhesive track, however, an incision in the adhesive track is made beforehand by means of a tool. Such a cut is made, for example, by a sword-like tool that provides an elongated cut in the adhesive track. After attaching the incision, the filling agent is pushed through the thereby expanding incision into the interior of the gas bag. In this method, it is thus provided to push a special tool through the already cured adhesive track before the implementation of the filling by a closed adhesive track to open them before mounting the Beglallffens. Through this incision, the filling agent is then pushed after removal of the tool.
• an elastically deformable insertion channel of a precisely defined diameter for receiving the filling means is provided in a connection region of the gas bag.
• This aspect of the invention thus provides that initially an elastic insertion channel of precisely defined diameter is produced, into which then the filling agent can be introduced.
• the diameter of the channel provided is smaller than the diameter of the filling, so that upon insertion of the filling agent in the channel adhesive is forced outward Shen and exerts an elastic holding force on the filling.
• the insertion channel of a precisely defined diameter it is provided to apply at least one adhesive trace to a lower gas bag layer in the connection region.
• this adhesive trace or, if more adhesive tracks are provided, between these traces of adhesive in the wet state of the adhesive, an inlay is inserted, which is typically formed flat. Subsequently, at least one upper gas bag layer of the gas bag is applied. The assembly can then be pressed to the desired silicone track height. Subsequently, the adhesive cures. After curing of the adhesive is provided according to a variant of the invention that the inserted inlay is now removed. After removal of the inlay remains a defined insertion channel, which is formed by adhesive material of the at least one adhesive track and therefore elastic. The exact provision of this channel is also in the case of extremely large tolerances of the adhesive trace due to the described manufacturing process, in which the inlay is inserted into the still wet adhesive.
• the inlay remains in place and is not removed.
• the inlay consists of an elastic material, for example of the same material as the adhesive layer and completely connects to the adhesive layer.
• the inlay thus provides a part of the adhesive layer.
• An embodiment of the invention provides that at least two adhesive traces of adhesive running parallel to one another are applied to the lower gas bag layer in the connection region. Between these, the inlay is then placed in the wet state of the adhesive, wherein the side faces of the inlay facing the respective adhesive tracks are wetted with the adhesive of the respective adhesive track, so that after hardening and removal of the inlay a defined insertion channel is present, irrespective of any tolerances adhesive stripe.
• Beyogllffens can be done for example by means of a pneumatic piston which pushes the filling agent in a narrowed adhesive track.
• connection force and the tightness in order to increase the connection force and the tightness, additional cable ties, clamps, heat shrink tubing or the like are used in the region of the filling connection. These cause an additional holding force, which acts in addition to the holding force provided by the adhesive according to the invention. Especially with small channel widths can be dispensed with such additional connection means.
• connection force provided by the elastic displacement of the adhesive can thereby be maximized be that the channel is designed so narrow that when inserting the filling agent, the adhesive is loaded up to or beyond the strain limit beyond.
• the minimum channel opening width of the adhesive track automatically adapts to an optimized geometry.
• the joining direction is parallel to the gas bag main layers glued together by the adhesive track.
• the filling agent can be frictionally held in the opening of the gas bag by the elastic holding forces of the adhesive.
• the holder of the filling agent in the opening of the gas bag by the elastic holding forces of the adhesive can be carried out without causing an adhesive bond between the filling and the airbag assembly (in particular the adhesive) is produced.
• the formation of an adhesive bond can be prevented, for example, by the filler is brought into contact after curing of the adhesive with this.
• 3A-3D are sectional views through an adhesive and a filling means arranged therein for explaining the physical background of the first embodiment of the method;
• FIGS. 7A, 7B show a fifth modification of the first embodiment of the method according to the invention.
• FIG. 1 1 A 1 1 D sectional views through an adhesive and arranged in this filling means for explaining the physical
• 12A, 12B show a first modification of the second embodiment variant of the method according to the invention
• FIGS. 13A, 13B show a second modification of the second variant of the method according to the invention.
• 16A is a schematic representation of a force-displacement diagram of a
• 16B is a schematic representation of a force-displacement diagram of a
• Fig. 17 shows an opening of an airbag after removing a previously with the
• FIGS. 1 A to 1 D show schematically the provision of an insertion channel of defined diameter in a filling nozzle of a gas bag and the arrangement of a filling agent in such an insertion channel.
• a flat inlay 3 is inserted into the wet silicone, as shown in FIG. 1B.
• the inlay 3 is designed such that its lateral boundary surfaces 31, 32 in the areas which run parallel to the arms 21, 22 of the silicone track 2, directly adjacent to the silicone track 2 and are wetted by the adjacent silicone, even if the silicone trace 2 with manufacturing tolerances on the airbag layer 1 1 is placed.
• the silicone track 2 and the inlay 3 are thus designed such that the silicone track reaches the edges 31, 32 of the inlay 3 in every tolerance case.
• an upper airbag layer or an upper fabric blank is placed on the lower airbag layer 1 1. Subsequently, the resulting assembly is pressed to the desired silicone track height.
• the upper gas bag layer is not shown separately for a better clarity of the presentation.
• the upper gas bag layer and the lower gas bag layer 11 are connected to one another along their edge region by means of the silicone track 2, which extends along the entire circumference of the gas bag 1 which has now formed.
• the inlay 3 is removed, cf. Figure 1 C.
• the resulting insertion channel 5 has exactly the opening width of the inlay 3.
• the Insertion channel 5 provides an opening of the gas bag 1, can be filled via the gas for filling the gas bag 1 in this.
• a filling means 6 is now defined in FIG 1 D, which serves to fill the gas bag 1 with gas.
• the filling means 6 are, for example, a hose, a pipe, a gas generator or a valve.
• the filling 6 is thereby inserted parallel to the fabric layers 1 1 through the insertion channel 5, which has a smaller diameter than the filling 6. This allows the elasticity of the silicone can be used to the insertion channel 5 and the silicone arms 21, 22, this define in order to bias the introduced Beglallstoff 6 around and thus to realize a close concern to the contact surface between filling and silicone.
• the filling means 6 is secured from the outside by means of an additional squeezing means 7 in order to increase the connection force and tightness.
• a squeezing means 7 for example a hose clamp or a cable tie, does not have to, as in the prior art, push a gap between the silicone track 21, 22 and the filling means 6. Accordingly, due to the inherent elasticity of the silicone used and the associated positive engagement of the surfaces, the required tightening force of the squeezing means 7 is reduced.
• FIGS. 2A, 2B which otherwise correspond to FIGS. 1B and 1C.
• the holding force of the compound alone on the inherent elasticity of the expanded adhesive is large enough to achieve a sufficient bonding force between the abutting surfaces of silicone and filler.
• FIG. 3A starts from a clear gap 5, which the inlay 3 has kept clear.
• the silicone 20 is displaced concentrically. The silicone 20 can primarily only dodge up and down.
• the displaced silicone 20 clamps around the enclosed surface 61 of the filling means 6 in a form-fitting manner and rears upwards and downwards together with the bonded airbag fabric to the outside. Due to the positive connection and the elasticity of the silicone, which completely conforms to the surface 61 of the filling means 6, an absolute tightness is created between the inserted filling agent 6 and the silicone 20.
• the silicone used has an elongation capacity of about 1000%, i.
• the material can be pulled to its 10-fold extent.
• Value can be the optimal width of an inlay 3 approximately dimensioned.
• Elongation factor with about 5 are used.
• the scopes would be set for this case as follows:
• U (filler) ⁇ x D.
• Figures 4A, 4B show a modification in which the tightness of the connection is further improved by also forming a region 23 between the silicone track segments 21 forming the insertion channel 5 , 22 is filled with silicone, for example in the zone on which the outer squeezing agent 7 (see Figure 1 D) is subsequently pressed, resulting in a silicone surface without interruption around the inserted filling agent.
• the entire area 24 between the silicone track segments 21, 22 can also be filled up with silicone.
• the silicone extends not only at the lateral edges 31, 32 of the inlay 3, but also at the top and the bottom of the inlay 3, and thus surrounds this - and after removing the inlay the inserted filler - thus completely.
• the resulting adhesion surface is increased and the connection force between the filling agent and the gas bag is further increased.
• Figures 6A, 6B show an embodiment in which the adhesive force, reinforced by the bias of the silicone sufficient to allow a secure gas-tight connection without squeezing.
• the geometric constellation is crucial here.
• the height of the silicone track (blade height) and the puncture depth i.e., the length over which the elastic insertion channel 5 extends and abuts the filling means) are the primary parameters.
• the configuration of FIGS. 6A, 6B corresponds to the embodiment of FIGS. 5A, 5B, whereby however the insertion channel 5 is narrower and the inlay 3 accordingly has a smaller width.
• FIGS. 7A, 7B provides for the inlay to be simply left in the silicone surface.
• z For example, it may be provided that a flat tube 30 of the same material (eg, 2K silicone) is inserted which completely joins the silicone of the silicone suture 2, as shown in Figure 7A.
• a flat tube 30 of the same material eg, 2K silicone
• the filling means 6 is then inserted on the insertion channel formed in this way.
• the airbag 1 and especially the insertion channel 3 during assembly to hold or fix accordingly.
• the blank width of the key-shaped connection region 15 can be correspondingly widened, as shown in FIGS. 8A, 8B.
• the trunk-shaped connection region forms here Festhalter specific 151.
• the proboscis connection area 15 may be extended beyond the siliconized area, so that the protruding tabs 151 above and below the insertion opening can be used to counteract the insertion force, as shown in FIG. 9A. If necessary, the tabs 151 can be separated after the joining process, as indicated by the dashed line in Figure 9B.
• FIGS. 10A to 10D show a schematic representation of a further embodiment variant of the method according to the invention.
• a silicone track 2 is provided between at least two gas bag layers of a gas bag 1.
• the silicone track 2 forms a closed silicone track, which runs along the circumference of the gas bag 1 and connects the edge regions of each other.
• the manufacture of the gas bag 1 is carried out in accordance with standard.
• the filling means 6 can be pressed by means of a pneumatic piston or the like through the closed silicone track 2. Due to the large puncture forces by the closed silicone track 2, it is advantageous if the airbag 1 is fixedly mounted on a work table for mounting.
• the elasticity of the silicone ensures a light reclamping of the inserted object and a tight connection of the surfaces to each other.
• the silicone is torn in the middle and displaced concentrically to the outside. This is biased thereby causing a close fit around the contact area, i. the outer surface of the filling 6th
• Figures 1 1 A to 1 1 D explain - in a similar manner as Figures 3A to 3D to the embodiment of Figures 1 A to 1 D - the physical background of the compound.
• the tightness and adhesion of the connection between the filling means on the one hand and the gas bag or silicone 20 of the silicone track 2 is achieved in that the silicone 20 is displaced from the inside to the outside.
• the expansion capacity of the silicone for example, about 1000%, d. that is, the material can be stretched ten times before it breaks.
• FIG. 11A illustrates, starting from a central application of the penetration of the filling means 6, a concentric displacement of the silicone 20 of the silicone track 2 by the insertion of the filling means 6.
• the silicone 20 can primarily only escape upwards and downwards.
• the displaced silicone 20 clamps positively around the inserted surface 61 of the filling means 6.
• FIG. 11C a higher resistance of the relatively widely present silicone 20 is present in the horizontal direction.
• the silicone is relatively thinner, so that the counterforce is correspondingly less strong.
• the silicone 20 is therefore stretched most on the left and right sides.
• Figures 12A, 12B show a modification of the embodiment of Figures 10A to 10D, in which the insertion point is executed in the silicone track 2 as a trunk 25 to the contact surface between the silicone on the one hand and the inserted object on the other hand and thus the adhesion of the compound enlarge.
• the trunk-like silicone trace 25 is formed in a key-shaped connection region 15 of the gas bag 1 and is designed so that they superimpose the parallel track segments in each case of tolerance.
• a filling hose 6 can now be inserted in the center in a defined manner, as shown in FIG. 12B.
• the piercing force increases accordingly with the piercing depth.
• a squeezing agent can be dispensed with.
• the holding force of the joint is high enough over the inherent elasticity of the expanded silicone 20 to achieve sufficient adhesion and impermeability of the surfaces to one another.
• the height of the silicone track 25 (blade height) and the insertion depth are the decisive parameters for the adhesion of the connection and can be adapted to the respective application.
• the applied crushing means 7 no longer has to close the existing gap in the prior art between silicone track and inserted filling gas-tight. Due to the inherent elasticity of the silicone and the positive engagement of the surfaces reduces the required tightening force of the squeezing 7th
• an embodiment of the invention provides for the use of a mandrel for a piercing work, as in FIGS Figures 13A, 13B is shown.
• Mandrel 8 can be arranged on the front end of the filling means 6 to be introduced and facilitates the puncturing of the filling 6 by the silicone trace 2.
• the mandrel 7 can be removed again, for example by the hollow cylinder of a tubular filling 6. Furthermore, such Mandrel 8 serve to provide the most straightforward and defined penetration of the filling means 6, whereby the resulting predetermined breaking point defined more precisely and an improved quality of the arrangement is provided.
• connection region 15 gets wider edges 151, in which the gas bag for holding the filling means 6 can be held, as shown in FIG. 14A.
• connection region 15 is extended beyond the siliconized region, so that the protruding tabs 151 above and below the insertion opening can be used to counteract the insertion force.
• Figures 15A to 15D show a modification of the method, which is preferably used in particular for filling of larger diameter, in particular for filling with a diameter of more than 8 mm. It is provided that initially with the aid of a tool 9, an opening 10 is pushed into a silicone track 2 to a kind of receiving channel for the filling, z. As a gas generator to provide. The tool 9 can be designed to be sword-like. After opening the silicone seam 2, the tool 9 is pulled out again. Subsequently, the filling is pushed through the resulting, for example, slot-like opening 10 in the silicone track 2. The method then proceeds as described with reference to FIGS. 10A to 10D.
• the gas generator When mounting e.g. a gas generator in an airbag, the gas generator can be firmly clamped while the airbag are pushed over it. It is also possible to fix the gas bag mouth and to push the gas generator with a pneumatic insertion aid in the gas bag.
• the rubber-like nature of the silicone allows a pushing in of gas generators with sharp edges within limits of work safety.
• FIGS. 16A and 16B each show a force-displacement diagram from tensile force measurements in a pull on the filling means 6 with the gas bag 1 held in concrete application examples.
• Curves V1, V2 in FIGS. 16A and 16B respectively show the course of an applied (tensile) force K, K 'against a traveled path W, W' of a traction device.
• the axes K, K ', W, W' of the two diagrams shown schematically are scaled differently, so that the curves of the curves V1, V2, but not their absolute values with reference to FIGS. 16A and 16B can be compared.
• the curve V1 shown in FIG. 16A from the measurement of a concrete elastic support of the filling means 6 by elastic holding forces of the adhesive 20 reaches a maximum value M1 which - with an equal length (viewed in the direction of tension) of the adhesive 20 - is higher than a maximum value M2 of FIG Curve V2.
• the traction means Upon reaching the maximum value M1, the traction means brings the filling means 6 in relative movement to the adhesive 20.
• the filling means 6 is held by the adhesive 20 frictionally in the opening 5 of the airbag 1.
• a transition from static friction to sliding friction manifests itself in a drop in tensile force (in this case about 2/3 of the maximum M1).
• the tensile force remains substantially constant, so that the curve V1 forms a plateau P. If the contact area between the filling agent and the adhesive begins to decrease, the tensile force continues to drop (substantially linearly) in a section L1 to zero. This corresponds to the location at which the filling means 6 out of contact with the adhesive 20.
• the adhesive 20 exerts elastic holding forces on the filling means 6, even after a certain displacement of the filling means 6 (for example by a few mm), it can seal it in the opening 5 in a gastight manner. A strain relief of the filling means 6 can still be provided.
• the tensile force K 'decreases during the bonding of the filling means 6 without elastic holding forces (FIG. 16B) due to a destruction of the adhesive bond upon reaching the Maximum value M2 decreases rapidly, in this case to about 1/3 of the maximum force M2.
• the tensile force in a section L2 drops substantially linearly.
• the curve K2 reaches a value of the tensile force K 'of about zero already after a shorter path length W'.
• a force-fit filling means 6 is therefore held more securely in the opening.
• FIG. 17 shows an opening 5 of an airbag 1 after removal of a filling agent 6 previously adhesively bonded to the opening 5 by means of adhesive 20 (not shown).
• the opening 5 substantially corresponds to the diameter of the filling means 6 (in contrast to the holder with elastic holding forces, as already described in connection with FIGS. 3A to 3D and 1 1 A to 1 1 D).
• the adhesive 20 has already been brought into contact with the filling agent 6 for the bonding before curing.
• the adhesive 20 has therefore only placed around the filling 6, without building elastic holding forces.
• the adhesive 20 seals no longer gas-tight against the filling means 6, even if this is still (at least partially) in the opening 5.
• a broken adhesive bond can not provide strain relief.
• a pressurization of the gas bag 1 can also push out the Be colllstoff 6 from the opening of the airbag 1 in a destroyed adhesive bond.
• An example of an application of the gas bag arrangement according to the invention and of the method according to the invention consists in that a tube of, for example, a diameter of 6 mm is guided through a dry silicone track to fill a small airbag with a volume of about 1 liter.
• a gas generator is passed through a dry silicone track.
• z. B a standard gas bag with a volume of 36 I
• the dry silicone trace according to Figures 15A-15D first pierced and then pushed the gas generator.
• the invention is not limited in its embodiment to the embodiments shown above, which are to be understood only as examples.
• the silicone tracks may be realized in a different way and with a different shape than shown.

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• Engineering & Computer Science (AREA)
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