WO2019121154A1

WO2019121154A1 - Method for producing a pressure tank

Info

Publication number: WO2019121154A1
Application number: PCT/EP2018/084326
Authority: WO
Inventors: Markus FRIEDERICH; Franz Hofmann; Thomas Lanzl
Original assignee: Rehau Ag + Co
Priority date: 2017-12-22
Filing date: 2018-12-11
Publication date: 2019-06-27
Also published as: DE102018106925A1

Abstract

The invention relates to a method for producing a pressure tank (1), having the steps of: providing an elongated pressure container (2) with at least one longitudinal end (4) which tapers in the direction of a pressure container end; providing multiple force introduction elements (6), each of which has an elongated connection region (7) with a tapering protrusion (10) and an anchoring region (8), wherein an acute angle (α) is formed between the connection region (7) and the anchoring region (8), thereby forming an undercut (11); at least indirectly arranging the anchoring regions (8) of the force introduction elements (6) on the lateral surface of the longitudinal end (4) such that the connection regions (7) are aligned at least substantially parallel to the container longitudinal axis (A) of the pressure container (2); wherein a reinforcing layer (5) is produced on the pressure container (2) in that a relative movement is repeatedly carried out between the pressure container (2) and a braided tube (18) made of a reinforcing braiding, and during the relative movement, the protrusions (10) pass through the braided tube (18) and the braided tube (18) hooks onto the undercuts (11). Each individual layer (17) of the reinforcing braiding is arranged one over the other on the pressure container (2), and the force introduction elements (6) are anchored in the reinforcing braiding.

Description

Method for producing a pressure tank

The invention relates to a method for producing a pressure tank specified in the preamble of claim 1. Art.

Pressure tanks for storing and dispensing compressed fluid fuels are known per se. For example, WO 2017/008899 A1 shows such a pressure tank and a method for producing such a pressure tank. An elongated pressure vessel is provided with at least one longitudinal end tapered towards a pressure vessel end. In addition, a plurality of force introduction elements are provided, each having an oblong connection area with a tapered projection and an anchoring area, wherein an acute angle is enclosed between the respective connection sections and anchoring sections, thereby forming an undercut. The force introduction elements are arranged at least indirectly with their anchoring regions on a lateral surface of the longitudinal end, so that the connecting regions are aligned at least substantially parallel to the container longitudinal axis of the pressure vessel. In order to reinforce the pressure vessel, it is intended to produce a reinforcing layer on the pressure vessel, wherein the reinforcing layer comprises a reinforcing braid. A major challenge is to embed the force introduction elements, which are also referred to as inserts, in this Armierungs layer and to anchor within this and thus in the pressure tank.

It is the object of the present invention to improve a method for producing a pressure tank of the type mentioned in such a way that it can be anchored to the pressure vessel in a particularly simple manner in the course of application of the reinforcing layer in said and thus on the pressure vessel said force introduction elements.

This object is achieved by a method for producing a pressure tank with the Merkma len of claim 1. Advantageous embodiments with appropriate and

l Non-trivial developments of the invention are angege ben in the dependent claims.

In the method according to the invention for producing a pressure tank, an elongated pressure vessel is provided with at least one tapering towards the longitudinal end in the direction of a pressure vessel end. For example, the pressure vessel may have a zylinderförmi gene central region, wherein at the longitudinal ends of each one of the tapered longitudinal ends is arranged. The tapered longitudinal ends can be designed, for example in the form of so-called polar caps, so have a hemispherical or dome-like shape. Preferably, the pressure vessel is made of a material which is gas- and / or liquid-tight. The elongated pressure container can for example be made in one piece of a thermoplastic material or steel or aluminum.

Furthermore, it is provided to provide a plurality of force introduction elements, each having an elongate connection region with a tapered projection and an anchoring region, wherein in each case between the connection region and the anchoring region enclosed an acute angle and thereby an undercut is formed. The provided force introduction elements are arranged at least with their anchoring areas on a lateral surface of at least one longitudinal end, so that the connecting portions are aligned at least substantially parallel to the container longitudinal axis of the pressure vessel.

In order to fix the arranged force introduction elements in a particularly simple manner on Druckbe container, it is provided according to the invention that a reinforcing layer is made on the pressure vessel by a repeated relative movement between the pressure vessel and a trained from a reinforcing braided braided hose is performed, wherein the projections through immerse the braided tube and the braided hose hooked to the undercuts, wherein each individual layers of the reinforcing braid arranged one above the other on the pressure vessel and the force introduction elements are anchored in the reinforcing braid.

Despite the axial alignment of the force introduction elements, it is thus possible in a simple manner to anchor the force introduction elements in the reinforcement braid during the production of the reinforcing layer on the pressure vessel. The braided hose is in other words, a kind of braid made of reinforcing fibers. The ampli kung fibers, for example, be made of carbon fibers or other materials be. Due to the relative movement between the pressure vessel according to the invention and the braided hose formed from the reinforcing braid, it is possible in a simple manner to fix or anchor the force introduction elements within the individual layers of the reinforcing web. The relative movement between the pressure vessel and the braided tube takes place in a kind of oscillating movement, in which the projections of the individual force introduction elements repeatedly through the braided tube and then the relative movement between the pressure vessel and the braided tube is designed so that the braided tube to closing on the respective connecting portions of the force introduction elements is slipped and hooked to the undercuts.

Thus, it is possible in a simple manner, gebrin conditions for position of the braided hose formed from the reinforcing braid on the pressure vessel in the form of the reinforcing layer gene, wherein the individual force introduction elements are anchored with their anchoring areas within the inner half of the reinforcing braid. The reinforcement layer made from the reinforcement layer can be provided, for example, prior to attachment to the pressure vessel with a reinforcing resin, so that individual fibers of Verstärkungsge braid are already embedded in a plastic matrix. The braided hose can therefore be a so-called prepreg. Prepreg is the English short form for preimpregnated fibers, to German pre-impregnated fibers.

Alternatively, it is also possible that in the course of the application of the reinforcing layer single Lich the reinforcing braid from which the braided tube is made, without a plastic matrix is applied. After producing the reinforcing layer on the pressure container, it is possible, for example, subsequently impregnate the reinforcing braid formed from the reinforcing layer with a matrix material. Alternatively, it is also possible to leave the reinforcing layer without a plastic matrix. If no matrix material is used, no shear loads can be transferred between the individual layers of the reinforcing mesh, even if the pressure tank is under internal pressure, for example, and thus easily expands. In this case, the individual fibers of the reinforcing braid can therefore move freely relative to one another. If a matrix is embedded, the reinforcing braid in this case only serves to To limit a high internal pressure of the pressure tank, in particular a radial expansion of the pressure tanks and thus to prevent bursting of the pressure vessel.

An advantageous embodiment of the invention provides that the braided tube by means of a one, preferably variable, braided had Radialflechtmaschine is Herge, wherein the relative movement between the pressure vessel and the braided eye takes place. It may therefore be provided that the braided hose is continuously produced as a semi-convincing means of the radial braiding machine. By means of a variable wicker eye, it is possible in a simple manner to vary the diameter of the braided hose or the tubular hose braid. In general, however, the diameter of the braided hose due to the elastic restoring forces of the material of the braided tube pulls itself together automatically when the pressure vessel has passed through the braided eye. The braided hose wants to contract by itself, but is ever "kept open" by the pressure vessel. A variable wicker eye thus supports this process, but is not absolutely necessary. In this way, the diameter of the braided hose can be easily adapted to the outer contour of the pressure vessel, so that respective individual layers of the reinforcing braid can be fitted accurately to the pressure vessel. In particular, it is thereby possible to increase the diameter of the braided hose successively when mounting the reinforcing braiding in la in order to bring it to the pressure container in layers without any problems. For example, the Radialflechtmaschine a so-called Flechtrad aufwei sen, by means of which individual fibers of the reinforcing braid in the direction of Flechtau ges are performed, in particular in the braiding eye, the actual Ver strengthening braid is made in the form of Flechtschlauchs. For example, it is possible that the diameter of the braiding eye is varied by a rotation of the braided wheel, and thus the diameter of the braided hose continuously produced can also be varied. The production of the braided hose and attaching the braided hose in the form of the reinforcing layer on the pressure vessel is preferably carried out in a kontinuierli chen process, wherein the relative movement between the pressure vessel and the

Flechtauge takes place, for example, by the pressure vessel is oscillatingly moved to the left and right through the braided eye. Of course, it is also possible that the pressure vessel does not move and instead the radial braiding machine is moved relative to the container Druckbe. A further advantageous embodiment of the invention provides that the force introduction elements are arranged according to a predetermined pitch circle diameter at a corresponding axial position of the lateral surface of the longitudinal end, wherein after the braided has passed the projections, a diameter of the braided hose is reduced to below the pitch circle diameter, consequently the Protrusions penetrate the wicker hose. The protrusions thus serve as a type of braid tip, which easily penetrate through the braid of the braided tube, because after the braided eye has passed the projections, the diameter of the braided tube is reduced until the diameter of the braided tube is slightly smaller than the said circle diameter. In this way, it can be ensured in a simple manner that the respective projections of the connection regions of the force introduction elements through the amplification mesh of the braided hose to submerge. As a result, braiding of the force introduction elements by means of the braided tube during the production of the reinforcing layer can be ensured in a simple manner.

According to a further advantageous embodiment of the invention, it is provided that after the projections have penetrated the braided tube, the relative movement is reversed at a first reversal point, as a result, the braided tube is slipped over the connecting portions and hooked to the undercuts, the rela tivbewegung thereafter is reversed again at a second reversal point. Thus, as soon as the respective projections of the force introduction elements are slightly penetrated through the braided hose out, the relative movement at said first reversal point is vice versa so that the braided hose is slipped over the connecting portions of the respective Krafteinlei processing elements. The relative movement is continued in this direction so far that hooked the braided hose to said undercuts. After this has taken place, the relative movement can continue in the same direction who the until the second reversal point is reached. Once this has been achieved, the relative movement is reversed again, as a result, a next layer of Flechtschlauchs introduced and by the relative movement of the braid tube concerned is again brought up to the projections of Flechtschlauchs and to the first reversal point. Due to the relative movement between the two reversal points, the braided hose can be applied in layers to the pressure vessel in a simple manner, during which the force introduction elements are braided at the same time by means of the reinforcing braid and thereby anchored in layers in the applied reinforcing braid. A further advantageous embodiment of the invention provides that the diameter of the braided tube at the first reversal point is adjusted so that the braided tube does not touch the longitudinal end of the pressure tank. As a result, the production of the armouring layer can be carried out particularly reliably, since it can be ensured that the braided hose, for example, does not catch on the longitudinal end of the pressure tank in an undesired manner. In other words, a respective angle enclosed between a longitudinal axis of the force introduction elements and an outer side of the braided tube is chosen so small that the braided tube does not come to rest against the tapering projection of the force introduction elements on the pressure vessel.

According to a further advantageous embodiment of the invention, it is provided that the first reversal point and / or the second reversal point in the axial direction during the production of the reinforcing layer is varied at the pressure vessel. By varying the positions of the respective reversal points, it is easily possible to vary a length of the applied individual layers of the reinforcing braid. Preferably, it is provided that at least when applying two of the individual layers of the reinforcing braid, a distance between the reversal points is reduced. Thus, for example, it is possible that several of the individual layers with the same longitudinal extent are introduced, in which case the distance between the reversal points is reduced when changing from an already applied single layer to the next single layer, as a result of which the single layer then applied has a shorter longitudinal extent. By varying the distance between the two reversal points, a respective length of the individual layers of the applied reinforcing mesh can thus be easily adjusted.

In a further advantageous embodiment of the invention, it is provided that the Druckbe container is moved by means of a linear unit in the direction of the container longitudinal axis of the pressure vessel relative to the braiding of the Radialflechtmaschine. This has the advantage that the usually much heavier radial braiding machine does not have to be moved at all, since during production of the reinforcing layer only the pressure vessel by means of said linear unit in the direction of the container longitudinal axis relative to

Flechtauge is moved. For example, it would also be possible to use a robot instead of the linear unit, by means of which the pressure tank is moved back and forth relative to the braided eye. According to a further advantageous embodiment of the invention, it is provided that the elongate connection regions of the force introduction elements are each made of a längli Chen base body and a removable tip in the form of the tapered jump ago. Preferably, it is provided that respective threads are produced on the elongate base bodies and removable tips, so that the tips can be fastened by means of a screw connection to the elongated base body. However, the tips can also be otherwise releasably joined to the elongated body, for example via a positive connection or magnetic force. The tips can be made, for example, conical or pyramidal, wherein the elongate base body having a corresponding cross-sectional shape, that is circular, oval or rectangular, for example. Before the production of the reinforcing layer on the pressure vessel, the tips can be screwed onto the elongated connection regions of the force introduction elements or otherwise joined. The tips make it possible, in a simple manner, for the elongate connection regions to be able to penetrate through the reinforcing braid in the manner already described. After the reinforcing layer has been made finished ago, the tips can be unscrewed in a simple manner. For example, the elongated connection regions have an internal thread, wherein the tips have an external thread. The elongated connection areas with Innengewin the example can serve to connect the pressure tank in the installed state to a Ver sorgungsleitung or the like. Further, for example, it is also possible, please include, that the pressure tank is screwed vehicle with its connection areas in a trunk of a motor vehicle, for example, if it is at the pressure tank to a What hydrogen tank or a gas tank or the like. Characterized in that the introduction of force elements with their connecting areas in the course of the production of Armierungs layer have been firmly anchored within the reinforcing braid, the finished forth asked pressure tank can be anchored in a simple manner via the connecting portions of the force introduction elements reliably and firmly.

Finally, a further advantageous embodiment of the invention provides that the force introduction elements are arranged such that the pressure vessel extends beyond the Krafteinlei processing elements in the axial and radial directions. This results in a particularly good overall space utilization, since the force introduction elements are mounted in the areas on the elongated pressure vessel in which they do not influence the maximum dimensions of the pressure vessel in the axial and radial directions. Further advantages, features and details of the invention will become apparent from the fol lowing description of a preferred embodiment and the drawing tion. The features and feature combinations mentioned above in the description can be used not only in the particular combination specified, but also in other combinations or in isolation, without departing from the scope of the invention.

The pressure vessel may also be referred to as an inner container.

The drawing shows in:

Figure 1 is a side view of a pressure tank having a pressure vessel to which a plurality of force introduction elements are arranged at its tapered, dome-shaped longitudinal ends, wherein the pressure vessel is provided with a reinforcement layer made of reinforcing braid.

2 shows a frontal view of an end face of the pressure tank, in which the arrangement of the force introduction elements can be seen, which are arranged according to a predetermined pitch circle diameter at a corresponding axial position of a lateral surface of the illustrated longitudinal end of the pressure vessel.

Fig. 3 is a side view of one of the force introduction elements, which has a längli Chen connection area with a tapered projection and a plat tenförmigen anchoring area;

4 shows a plan view of the force introduction element;

Fig. 5 is a perspective view of the force introduction element, wherein the tapered projection has been removed from an elongate body of the elongate Verbindungsbe range and thereby releases a bore;

6 shows a radial braiding machine with a variable braided eye for producing the

Reinforcing braid in the form of a braided hose, which layerwise forms the Ar mierungsschicht on the pressure vessel;

Fig. 7 is a perspective view of a portion of the pressure vessel, while the armor layer is made on the pressure vessel by the pressure vessel is axially moved back and forth through the braided eye;

Fig. 8 is a schematic representation of process steps for producing the Armie ing layer on the pressure vessel.

In the figures, the same or functionally identical elements are provided with the same Bezugszei surfaces. A pressure tank 1 for storage and delivery of compressed fluidic fuels is shown in egg ner side view in Fig. 1. The pressure tank 1 comprises an elongated pressure vessel 2, which has a cylindrical central portion 3 and two adjoining, ver younger longitudinal ends 4. The tapered longitudinal ends 4 are in the form of polar caps and have a dome-shaped or hemispherical shape. On the outside of the pressure vessel 2, a reinforcing layer 5 is attached, which has a plurality of layers of a reinforcing braid unspecified here. The pressure vessel 2 may for example be made of a thermoplastic material, which is gas-tight and liquid-tight. The reinforcing mesh of the reinforcing layer 5 may consist of carbon fibers or other reinforcing fibers, for example.

At the tapered longitudinal ends 4 of the pressure vessel 2 are several Krafteinlei processing elements 6 are arranged. The force introduction elements 6 may for example be made of egg nem metallic material. The force introduction elements 6 are used in example to anchor the pressure tank 1 in a trunk of a motor vehicle. If the said motor vehicle is driven by means of hydrogen, for example, hydrogen can be taken up by means of the pressure tank 1 and released to the motor vehicle. Just as well, the pressure tank 1, for example, serve to take gas, if the said vehicle is operated with gas. Basically, the pressure tank 1 is suitable for any applications in which compressed fluid and gaseous fuels must be stored and delivered.

The force introduction elements 6 have respective elongate connection regions 7 and respective anchoring regions 8, which are embedded in the reinforcing layer 5 and are thereby firmly connected to the pressure vessel 2. The connecting regions 7 thus nen to anchor the pressure tank 1 to various other elements, such as in a trunk or the like, and / or connect the pressure vessel 2 to ver most diverse connection options. The anchoring areas 8 serve to anchor the force introduction elements 6 to the pressure vessel 2, more precisely in the reinforcing layer 5.

The force introduction elements 6 are arranged so that they do not project beyond the pressure vessel 2 both in the axial direction and in the radial direction. This results a particularly compact design of the entire pressure tank 1, since the Krafteinlei processing elements 6 are arranged so that they do not affect the maximum dimensions of the Druckbehäl age 2 both in the axial direction and in the radial direction. The force introduction elements 6 are at least indirectly with their anchoring areas

8 arranged on a respective lateral surface of the longitudinal ends 4, in such a way that the connecting portions 7 are aligned at least substantially parallel to the container longitudinal axis of the pressure vessel 2.

In Fig. 2, the pressure tank 1 is shown in a frontal frontal view. The individual force introduction elements 6 are arranged according to a predetermined pitch circle diameter D at a corresponding axial position of a lateral surface of the longitudinal end 4 shown here. In the present illustration, it can be clearly seen that some of the force introduction elements 6 per anchoring area 8 have two connecting areas 7 and some of the force introduction elements 6 have only one anchoring area 8 per connecting area 7.

In Fig. 3, one of the force introduction elements 6 is shown in a side view. In the present presentation, the elongated connection region 7 and the Verankerungsbe are rich 8 clearly visible. The elongated connecting portion 7 comprises a längli Chen base body 9 and a removable tip 10, which forms a kind of tapered projection. The elongated base body 9 may, for example, have a not presented here Darge internal thread, the removable tip 10 may have an external thread, so that the tip 10 can be screwed into a simple manner in the elongated body 9 a. The removable tip 10 is relevant to a later ge even more explained manufacturing process of the reinforcing layer 5 on the pressure vessel. 2

The anchoring area 8 is formed substantially plate-shaped and can entge conditions of the present presentation, for example, have a curved shape, wel surface is adapted to a shape of the pressure vessel 2, so that the Verankerungsbe rich 8 particularly simple example, can be attached directly to the pressure vessel 2. Between the connection region 7, more precisely between the elongated body

9 and the anchoring area 8 is an acute angle a included, whereby an undercut 1 1 is formed. 4, the force introduction element 6 is shown in a plan view. Here is again good to see the arrangement of the elongated connection portion 7 on the plate-shaped Verankerungsbe rich 8.

In Fig. 5, the force introduction element 6 is shown in a perspective view, wherein the tip 10 has been screwed abge abge from the elongate base body 9 of the elongate connection portion 7. As a result, a bore B is released, which has the mentioned In nengewinde, which is not shown here, has. For example, a wide variety of connection elements can be connected to the internal thread of the bore B, to supply the pressure tank 1 with media or to fix the pressure tank 1 to a support structure or the like.

In Fig. 6, a radial braiding machine 12 is shown in fragmentary form, which serves to produce a reinforcing braid in the form of a braided hose, from which the Ar mierungsschicht 5 is made on the pressure vessel 2. By means of the radial braiding machine 12, a plurality of radially arranged fiber bundles are fed to the braided eye 14. When lead to the wicker 14, the individual fiber bundles 13 are intertwined to a Verstärkungsge braid in the form of a braided hose. The diameter of the variable Flechtau ges 14 can be varied within certain limits, as a result, a corresponding diameter of the continuously produced braided tube can also be varied.

In Fig. 7, a manufacturing process is shown, in which the reinforcing layer 5 is made at Druckbe container 2. The unspecified here pressure vessel 2 is by means of a linear unit 15 in the direction of the container longitudinal axis A according to the indicated double arrow 16 by the wicker 14 oscillating back and forth. As a result, be said reinforcing layer 5 is produced on the pressure vessel 2. Due to the repeated Relativbe movement between the pressure vessel 2 and from the individual fiber bundles 13 continu- ously braided hose respective individual layers 17 of the reinforcing layer 5 are successively attached to the pressure vessel 2. The removable tips 10 of the force introduction elements dive through the braided hose continuously produced from the fiber bundles 13 and the braided hose hooks on the respec gene undercuts 1 1. As a result of the oscillating movement corresponding to the double arrow 16 through the braiding eye 14, the individual layers 17 are thus arranged one above the other on the pressure vessel 2, with the individual force introduction elements 6 simultaneously anchoring their areas 8 in the reinforcing braid of the continuously produced and stored Flechtschlauchs be anchored.

In Fig. 8, the manufacturing process of the reinforcing layer 5 is shown schematically on the basis of several Ab. The radial braiding machine 12 is indicated schematically, to which the previously already mentioned several times braided hose is shown in fragmentary and schematic manner. The preferably rotationally symmetrical braiding tube 18 is only half in a cutting position, wherein a lower half of the braided tube 18 is not shown.

According to the illustration of the top figure, the pressure vessel 2 is moved according to the arrow 19 to the right, as a result, here partially recognizable longitudinal end 4 of the pressure vessel 2 from the braiding 14 not shown here Radialflechtma machine 12 is pulled out. This movement is continued until the state shown in the second figure from above is reached. During the relative movement of the pressure vessel 2 from the positioning shown in the uppermost figure to the positioning shown in the second uppermost figure, the diameter of the

Flechtauges 14 of the radial braiding machine 12 so far reduced that the diameter of the braided hose 18 is slightly smaller than the pitch circle diameter D (see Fig. 2). As a result, the tips 10 of the individual force introduction elements 6 easily penetrate through the braided tube 18.

In the second highest figure, a first reversal point of the relative movement between the pressure vessel 2 and the radial braiding machine 12 and thus between the pressure vessel 2 and the braiding eye 14, not shown here, is achieved. The first reversal point may correspond to a kind of neutral position, in which the braided hose 18 extends at least substantially perpendicular to the tank longitudinal axis A of the pressure vessel 2. Subsequently, the pressure vessel 2 is moved by means of the linear unit 15 according to the arrow 20 and the present illustration to the left, as a result, the pressure vessel 2 with its longitudinal end 4 passes through the braiding 14 of the radial braiding machine 12. During this relative movement in the direction of the arrow 20, the braiding tube 18 is slipped over the tip 10 and thus over the elongated main body 9 of the connecting segment 7 of the force introduction elements 6, which is not described here. As can be seen from the bottom figure, the movement of the pressure vessel 2 is continued according to the arrow 20, as a result, the braided tube 18 hooked to the respec gene undercuts 1 1 of the force introduction elements 6. The movement of the pressure vessel 2 relative to the braiding 14 of the Radialflechtma machine 12 is continued, for example, as far as the arrow 20 until the same principle at the other not shown here longitudinal end 4 of Druckbehäl age 2, the respective tips 10 of the force introduction elements 6 through the Immerse braided tube 18, after which at some point a second reversal point not shown here is reached. After the second reversal point has been reached, there is a BEWE circulation reversal, as a result, in the manner already described at the other not visible here longitudinal end 4 of the braided tube 18 is slipped over the respective connecting portions 7 of the force introduction elements 6 and during the further Relativbewe movement to the respective undercuts 1 1 hooked.

The relative movement of the pressure vessel 2 relative to the radial braiding machine 12 is continued in the manner described from left to right as often as individual layers 17 of the reinforcing layer 5 are to be attached. By means of the described method, it is possible in a simple manner to embed the force introduction elements 6 aligned in the axial direction into the reinforcing layer 5 and thereby securely and firmly anchor them to the container 2 for pressure.

In the above description of the figures, the pressure vessel may also be referred to as an inner vessel.

- Claims -

Claims

claims

1 . Method for producing a pressure tank (1), comprising the steps:

- Providing an elongated pressure vessel (2) with at least one in Rich tion of a pressure vessel end tapered longitudinal end (4);

- Providing a plurality of force introduction elements (6), each having a längli Chen connection area (7) with a tapered projection (10) and egg nen anchoring area (8), wherein between the connecting area (7) and the anchoring area (8) an acute angle (?) enclosed and thereby an undercut (1 1) is formed;

- At least indirectly arranging the force introduction elements (6) with their Veran kerungsbereichen (8) on a lateral surface of the longitudinal end (4), so that the Ver binding areas (7) at least substantially parallel to the container longitudinal axis (A) of the pressure vessel (2) are aligned; characterized in that a reinforcing layer (5) is produced on the pressure vessel (2) by carrying out a repeated relative movement between the pressure vessel (2) and a braided hose (18) formed from a reinforcing braid, in which the projections (10) through the braided hose (18) and immerse the braided hose (18) hooked on the undercuts (1 1), wherein respective individual layers (17) of the reinforcing braid one above the other on the pressure vessel (2) and the force introduction elements (6) are anchored in the reinforcing braid.

2. The method according to claim 1, characterized in that the braided hose (18) by means of a one, preferably variable, braided eye (14) having Radialflecht machine (12) is produced, wherein the relative movement between the Druckbe container (2) and the braided eye ( 14) takes place.

3. The method according to claim 2, characterized in that the Krafteinleitungsele elements (6) according to a predetermined pitch circle diameter (D) at a corre sponding axial position of the lateral surface of the longitudinal end (4) are arranged, where in after the braided eye (14) the projections ( 10), a diameter of the braided tube (18) is reduced to below the pitch circle diameter (D), as a result, the projections (10) penetrate the braided tube (18).

4. The method according to claim 3, characterized in that after the projections (10) have penetrated the braided hose (18), the relative movement is reversed at a first turning point, as a result, the braided hose (18) is slipped over the connecting portions (7) and hooked to the undercuts (1 1), wherein the relative movement is then reversed again at a second reversal point.

5. The method according to claim 4, characterized in that the diameter of the braided hose (18) at the first reversal point is adjusted so that the braided hose (18) does not touch the longitudinal end (4) of the pressure tank (1).

6. The method according to claim 4 or 5, characterized in that the first reversal point and / or the second reversal point in the axial direction during the production of the reinforcing layer (5) on the pressure vessel (2) is varied.

7. The method according to 6, characterized in that at least when applying two of the individual layers (17) of the reinforcing mesh a distance between the order to change points, in particular is reduced.

8. The method according to any one of claims 2 to 7, characterized in that the pressure vessel (2) by means of a linear unit (15) in the direction of the container longitudinal axis (A) of the pressure vessel (2) relative to the braided eye (14) of the radial braiding machine (12). is moved.

9. The method according to any one of the preceding claims, characterized in that the elongate connecting portions (7) of the force introduction elements (6) are each made of an elongated base body (9) and a removable tip in the form of the tapered projection (10).

10. The method according to claim 9, characterized in that on the elongated base bodies (9) and removable tips respective threads are made, so that the tips by means of a screw connection to the elongated bodies (9) be festigbar be.

1 1. Method according to one of the preceding claims, characterized in that the force introduction elements (6) are arranged such that the Druckbe container (2) projects beyond the force introduction elements (6) in the axial and radial directions.