DE102013205072A1 - Connecting device for introducing matrix material into a receiving space of a structural component semifinished product provided with reinforcing fibers, as well as a feeding system with such a connecting device and method for feeding matrix material - Google Patents

Abstract

A connection device (9) has a first channel (36) for introducing matrix material (2) into a receiving space (6) of a structural component semifinished product (3) provided with reinforcing fibers (7). A second channel (37) is used to set an internal pressure in an interior (8) of the semi-finished structural component (3). A first sealing unit (13) for sealing the receiving space (6) from an environment (58) is arranged on a base body (12). Furthermore, a second sealing unit (14) for sealing the receiving space (6) with respect to the interior (8) is arranged on the base body (12). The connecting device (9) enables the matrix material (2) to be introduced in a simple and quick manner.

Description

The invention relates to a connecting device for introducing matrix material into a receiving space of a structural component semifinished product provided with reinforcing fibers. The invention further relates to a feed system with such a connection device and to a method for feeding matrix material into a receiving space of a structural component semifinished product provided with reinforcing fibers.

From the WO 2010/129 975 A2 For example, a method for producing a fiber-reinforced structural component is known. A structural component semifinished product has two hollow-cylindrical wall elements which delimit a receiving space. In the receiving space reinforcing fibers are arranged, which must be soaked to produce a fiber-reinforced structural component with a matrix material. After the structural component semifinished product has been brought into a desired desired shape, matrix material is introduced into the receiving space, so that the reinforcing fibers are impregnated with the matrix material. By curing the matrix material, the fiber-reinforced structural component is formed.

The introduction of the matrix material follows by generating a pressure difference to the environment or the ambient pressure, ie by generating a negative pressure or an overpressure. Here, too high pressure differences, in particular at too high pressure, to various problems. On the one hand, leakage occurs, so that the matrix material no longer or only partially reaches the receiving space. On the other hand, there are undesirable deformations of the wall elements, in particular of the inner wall element, which lead to shifts of the reinforcing fibers and / or to a changing wall thickness of the structural component. To avoid these problems, the introduction of the matrix material can be done only with a comparatively slow with a small pressure difference.

The invention has for its object to provide a connection device that allows the introduction of matrix material into the receiving space of the structural component semi-finished product in a simple and fast manner.

This object is achieved by a connection device with the features of claim 1. According to the invention, it has been recognized that the matrix material can be introduced most quickly into the receiving space by generating a high overpressure, since a higher pressure difference can be generated in comparison to a negative pressure. Due to the formation of the first channel, the matrix material enters the receiving space and impregnates the reinforcing fibers of the structural component semifinished product. The first sealing unit serves to seal the receiving space relative to the environment, so that the matrix material emerging from the first channel can not escape into the environment before it enters the receiving space. In order to avoid undesired deformation of a first inner wall element of the structural component semifinished product, a second channel is provided, which opens into the interior of the structural component semifinished product delimited by the inner wall element. By means of the second channel, the internal pressure in the interior is adjustable and adaptable to the pressure in the receiving space or the pressure of the matrix material. When introducing the matrix material with an overpressure, a pressure medium is introduced into the interior via the second channel, so that the internal pressure forms a counter-pressure to the overpressure of the matrix material, whereby deformation of the inner wall element is avoided. The second sealing unit is used to seal the receiving space relative to the interior, so that the matrix material can not escape into the interior during insertion or the pressure medium can not escape into the receiving space.

The connecting device according to the invention is preferably used for introducing the matrix material into the receiving space with overpressure, however, the connecting device according to the invention is equally applicable for introducing the matrix material into the receiving space with negative pressure.

For introducing the matrix material, the first channel is connected to a first pump for generating an overpressure and / or underpressure, by means of which the matrix material can be introduced into the receiving space. Furthermore, the second channel is connected to a second pump, which serves to adjust the internal pressure and by means of which accordingly an overpressure and / or negative pressure in the interior can be generated. In the case of a high overpressure, the structural component semifinished product can be arranged in a component form during the introduction of the matrix material, so that an undesired deformation of a second outer wall element is avoided.

A connection device according to claim 2 allows a simple and effective way of sealing the receiving space from the environment. The structural component semifinished product is inserted with its end into the receiving opening. By means of the pressing element, the receiving element is pressed in the direction of the outer wall element, so that a circumferential sealing point is created between the outer wall element and the receiving element. Preferably, the pressing element generates a surface pressure of the receiving element, so that a flat sealing area is formed. The first sealing unit is thus designed such that the receiving element is pressed by the application of radial forces by means of the pressing member to the outer wall element, so that the receiving space is sealed from the environment.

A connection device according to claim 3 enables in a simple manner a mounting or dismounting on the outer wall element. The structural component semifinished product is introduced into the receiving openings of the pressing element and of the receiving element. By screwing the contact pressure element on the receiving element, the sealing point is generated. By loosening the screw and removing the receiving element and the contact pressure the connection device is easy to disassemble.

A connection device according to claim 4 enables in a simple manner the setting of the radial contact pressure and thus the setting of the corresponding sealing effect. Due to the tapered inner diameter of the contact pressure element is increasingly pressed against the outer wall element with increasing screwing of the pressing on the receiving element. As a result, the sealing effect is increasingly increased.

A connection device according to claim 5 enables an improved sealing effect. By the at least one elastic sealing element, a flat sealing area is generated with the outer wall element.

A connection device according to claim 6 enables in a simple manner the production of a flat sealing area. The fact that the elastic sealing element is arranged in a gap between the receiving element and the pressing element, this is deformed when attaching or screwing the contact pressure, so that the flat sealing area is formed.

A connection device according to claim 7 enables the formation of a flat sealing area in a simple manner. Characterized in that the elastic sealing element is arranged on an outer wall element facing the inside of the receiving element, this is increasingly deformed with increasing contact pressure, so that a flat and adjustable sealing area is formed.

A connection device according to claim 8 allows a simple structure. Due to the one-piece design, the first sealing unit itself or the receiving element itself need not be sealed relative to the base body.

A connecting device according to claim 9 ensures a rapid insertion of the matrix material into the receiving space. Due to the fact that the sealing units have to seal the receiving space from the surroundings and the interior, pressure is exerted on the wall elements in the direction of the receiving space by the sealing units, which in particular results in a narrowing of the receiving space in the area of the sealing units when the matrix material is introduced with high overpressure can lead. By the at least one spacer a minimum distance between the wall elements is ensured, so that the matrix material can be freely introduced into the receiving space. The at least one spacer thus ensures that despite a high contact pressure exerted by the first sealing unit, a minimum distance between the wall elements for easy introduction of the matrix material is ensured.

A connection device according to claim 10 ensures a simple and rapid introduction of the matrix material. Due to the hollow cylindrical design of the spacer can be introduced over the entire circumference in the receiving space, so that a narrowing of the receiving space over the entire circumference is avoided. The matrix material can be introduced unhindered into the receiving space through the at least one spacer channel.

A connection device according to claim 11 allows easy insertion and accelerated curing of the matrix material. Through the at least one electrically conductive spacer, a voltage can be applied to the reinforcing fibers of the structural component semifinished product via the electrically conductive connection element, so that a current flow arises along the reinforcing fibers. As a result, heat is generated, which accelerates the introduction and curing of the matrix material. Preferably, the first connection element and / or the spacer is made of metal.

A connecting device according to claim 12 is simple in construction and ensures the sealing of the receiving space from the environment. The connection element extends, for example, through the base body and abuts against the at least one spacer. In this way, a flow of current from the connection element via the at least one spacer to the reinforcing fibers can be generated. At the same time, the matrix material can be introduced into the receiving space via the first channel of the connecting element. The connection element is formed, for example, in one piece with the base body or screwed into the base body, whereby a seal against the environment is achieved by the screw connection. Preferably, the connection element extends through the base body, so that a Through opening of the connection element opens into a main body interior. The passage opening and the main body interior form the first channel for feeding the matrix material into the receiving space.

A connection device according to claim 13 ensures a simple way of sealing the interior space with respect to the receiving space. After being introduced into the inner space, the contact element rests against the inner side of the first, inner wall element, so that the inner space is sealed off from the receiving space. The second channel is formed in the abutment element. By the second channel thus the internal pressure can be adjusted in the interior. The contact element is designed such that in the inserted state, a radial contact pressure is generated on the inner wall element. By the contact element thus radial forces are exerted on the inner wall element. The at least one spacer ensures that a minimum distance between the wall elements is ensured.

A connection device according to claim 14 enables in a simple manner to set the sealing effect of the second sealing unit. Characterized in that the contact element is conical on the outside, the sealing effect is increased in an increasing introduction of the contact element in the interior. The radial contact pressure on the inner wall element is thus increased with increasing insertion of the contact element.

A connecting device according to claim 15 allows in a simple manner, the setting of the internal pressure in the interior. The second channel is formed in particular in the connection element and possibly also in the contact element. In addition, the connecting element may have a spreading effect, so that the connecting element when inserted into the recess of the contact element spreads the contact element and presses its outer side with a higher contact pressure against the inner wall element.

A connection device according to claim 16 enables in a simple way the adjustment of the contact pressure. Characterized in that the contact element is conical on the inside, the contact element is radially spread during insertion. For this purpose, the connecting element preferably has an external thread which can be screwed into an internal thread of the contact element.

A connecting device according to claim 17 ensures in a simple manner, the setting of the internal pressure.

A connection device according to claim 18 is simple in construction and ensures the sealing effect of the sealing units.

A connection device according to claim 19 enables in a simple manner an improved sealing effect of the second sealing unit. For introducing the matrix material, the outer wall element is shortened with respect to the inner wall element of the structural component semifinished product. In this way, the outer wall element can be additionally introduced into the first receiving element and the inner wall element in the second receiving element. By the second pressing element, the second receiving element is pressed radially on an outer side of the inner wall element, so that in addition to the sealing point formed by the contact element, a further sealing point is generated, which seals the inner space relative to the receiving space. For this purpose, the receiving elements are preferably arranged on opposite sides of the basic body. Preferably, the abutment element is arranged on the second pressing element, in particular integrally formed therewith. By means of the second pressing element, the second receiving element is thus pressed in the radial direction against the inner wall element.

A connection device according to claim 20 ensures the generation of the second sealing point in a simple manner.

A connecting device according to claim 21 ensures a good sealing effect of the second sealing point. Characterized in that the inner wall element is made of a flexible or elastic material, this is deformed during pressing of the second receiving element by the clamping edge, whereby a high sealing effect of the second sealing point is generated. The inner wall element is thus clamped between the conically shaped outer side of the contact element and the clamping edge of the second receiving element.

A connection device according to claim 22 ensures in a simple manner assembly and disassembly of the second sealing unit. The pressing element is screwed onto the receiving element in a simple manner, whereby it is pressed against the outside of the inner wall element. Preferably, the contact element is arranged on the contact pressure element, so that at the same time the contact element is inserted into the interior and the associated sealing point is generated when screwing the contact pressure element.

A connecting device according to claim 23 allows in a simple way to set the sealing effect of the additional sealing point. This is preferably the pressure element on the receiving element screwed.

A connection device according to claim 24 allows the generation of two sealing points in a simple manner. By attaching the contact pressure element, the contact element is introduced into the interior, whereby a first sealing point is generated with respect to the inside of the inner wall element. At the same time the receiving element is pressed against the outside of the inner wall member when attaching the pressing member, so that a second sealing point is generated.

A connecting device according to claim 25 is simple in construction and ensures a sealing of the receiving space from the environment.

A connection device according to claim 26 can be produced in a simple manner. In a first embodiment, preferably, the first receiving element and the abutment element are integrally formed with the base body of the plastic material. Preferably, in this embodiment, the first pressing member and / or the second connecting element are formed from the plastic material. In a further embodiment, the receiving elements are preferably formed integrally with the base body of the plastic material. In addition, in this embodiment, preferably the pressing elements and the contact element are formed from the plastic material, wherein the contact element is preferably formed integrally with the second pressing element. In addition, the second connection element is preferably formed of the plastic material.

A connection device according to claim 27 is reusable. In a first embodiment, preferably, the first receiving element and the contact element are integrally formed with the base body of the metal. Preferably, in this embodiment, the first pressing member and / or the second connecting element are formed from the metal. In a further embodiment, the receiving elements are preferably formed integrally with the base body of the metal. In addition, in this embodiment, preferably the pressing elements and the contact element are formed from the metal, wherein the contact element is preferably formed integrally with the second pressing element. In addition, the second connection element is preferably formed from the metal. In an embodiment of the contact element made of metal, the associated second connection element can have no spreading effect.

A feed system according to claim 28 enables a simple and rapid introduction of matrix material into the receiving space of the structural component semifinished product. The first pump is connected to the first channel of the connection device, whereas the second pump is connected to the second channel of the connection device. By means of the closure device, the interior can be closed in a simple manner at an end which is opposite to the connection device, so that adjustment of the internal pressure is possible in a simple manner. Due to the closure device, the inner wall element does not have to close the interior itself. As a result, a simple production of fiber-reinforced structural components from a structural component semifinished product is made possible. The structural component semifinished product can have a large length and be easily cut to the desired length for the production of fiber-reinforced structural components. The resulting open end is closed by the closure device. The closure device may for example comprise a sealing unit corresponding to the first sealing unit, which is integrally connected to a contact element, which is insertable into the interior and closes it. Furthermore, the closure device may, for example, be designed in accordance with the connection device, but instead of a connection element with a passage opening, have a closure element without a passage opening. When the matrix material is supplied with overpressure, the first pump is arranged on the side of the connection device, whereas the first pump is arranged on the side of the closure device when the matrix material is supplied with negative pressure.

The invention is further based on the object to provide a method which allows the introduction of matrix material into the receiving space of the structural component semifinished product in a simple and rapid manner.

This object is achieved by a method having the features of claim 29. The advantages of the method according to the invention correspond to the already described advantages of the delivery system according to the invention and the connection device according to the invention. The method can be developed in particular according to claims 1 to 28.

The structural component semifinished product has a first inner wall element, which is surrounded by a second outer wall element. The wall elements are designed as hollow profiles, in particular hollow cylindrical. Preferably, the wall elements have a round or oval cross-section. The wall elements limit in one Radial direction or transverse direction, a receiving space extending in a longitudinal direction. In the receiving space reinforcing fibers are arranged, which must be soaked to form a fiber-reinforced structural component with a matrix material. The inner wall element bounds an interior space.

The first inner wall element and / or the second outer wall element are preferably formed in one piece. For ease of molding, the first inner wall element and / or the second outer wall element are made of a bendable material, in particular a plastic material. Preferably, the first inner wall element and / or the second outer wall element are formed from a thermoplastic and / or elastomeric plastic material. Preferably, the inner wall element and / or the outer wall element are made of an elastically deformable material. As a result, the structural component semifinished product can be deformed manually and / or mechanically in a simple manner.

To produce a fiber-reinforced structural component, the structural component semifinished product is brought into a desired at least partially curved desired shape by deformation or bending. The deformation or bending can take place before and / or after the introduction of the matrix material.

By the subsequent curing of the introduced matrix material, a fiber-reinforced structural component is formed. After curing, the first wall element and / or the second wall element can be removed as needed. Because the first wall element and / or the second wall element are formed from an elastically deformable material, in particular a plastic material, removal is possible in a simple manner. Due to the preferably one-part design of the first wall element and / or the second wall element, the fiber-reinforced structural component after removal on a smooth and burr-free surface. Due to this high surface quality, the surface of the structural component does not have to be reworked.

Further features, advantages and details of the invention will become apparent from the following description of several embodiments. Show it:

1 a feed system with a connection device according to a first exemplary embodiment for introducing matrix material into a structural component semifinished product,

2 a connection device according to a second embodiment, and

3 a delivery system with a connection device according to a third embodiment.

The following is based on 1 a first embodiment of the invention described. A feeding system 1 serves to supply a matrix material 2 in a structural component semi-finished product 3 , The structural component semifinished product 3 has a first inner wall element 4 on, that of a second outer wall element 5 is surrounded. The wall elements 4 . 5 are hollow cylindrical and preferably arranged concentrically to a central longitudinal axis M _S. Preferably, the wall elements 4 . 5 formed from a manually bendable material, in particular an elastically deformable plastic material. For example, the wall elements 4 . 5 from one of the materials rubber, PCV, PE, PA, PU, PTFE and / or silicone.

The wall elements 4 . 5 limit a receiving space in a radial direction or transverse direction 6 which extends in a longitudinal direction. In the recording room 6 are reinforcing fibers 7 arranged to form a fiber-reinforced structural component with the Materixmaterial 2 have to be soaked. At the reinforcing fibers 7 These are, for example, glass fibers, carbon fibers, aramid fibers, basalt fibers, hemp, flax, cotton or mixtures thereof. The inner wall element 4 limits an interior 8th , As the structural component semi-finished 3 is tubular, is the annular receiving space 6 and the interior 8th at both ends of the structural component semifinished product 3 open.

The feeding system 1 has a connection device 9 and two pumps 10 . 11 on. A first pump 10 serves to introduce the matrix material 2 in the recording room 6 whereas a second pump 11 for setting an internal pressure p _i in the interior 8th serves. The pumps 10 . 11 are in 1 only shown schematically.

The connection device 9 has a first body 12 on, on which a first sealing unit 13 and a second sealing unit 14 are arranged.

The first basic body 12 is in 1 illustrated by dashed lines. The first basic body 12 is hollow cylindrical and defines a first body interior 15 , In the main body 12 is a hole 16 with an internal thread 17 formed, in which a first connection element 18 with an associated external thread 19 is screwed. The connection element 18 has a first passage opening 20 on that in the main body interior 15 empties.

The first sealing unit 13 has a first annular receiving element 21 with a first receiving opening 22 on, in which the structural component semi-finished 3 is insertable. The receiving element 21 is integral with the body 12 educated. The insides of the receiving element 21 and the basic body 12 are flush with each other. On the receiving element 21 is an external thread 23 formed, on which a first pressing element 24 with an associated internal thread 25 can be screwed on. The pressing element 24 has a second receiving opening 26 through which the structural component semifinished product 3 is insertable. In one of the receiving element 21 and the pressing element 24 limited gap is an elastic sealing element 27 arranged. The sealing element 27 is annular and deformable for sealing. In the area of the internal thread 25 is the inner diameter of the contact pressure element 24 conical, so that with increasing screwing of the pressing element 24 on the receiving element 21 a contact force in the radial direction is increased. The first sealing unit 13 serves to seal the receiving space 6 towards an environment 58 ,

The second sealing unit 14 has an investment element 28 on, which is to abut against an inside of the inner wall element 4 serves and in the interior 8th is insertable. The investment element 28 is integral with the body 12 educated. Due to the one-piece design is the body interior 15 at one of the receiving opening 22 completed on the opposite side. The investment element 28 extends through the body interior 15 and through the receiving openings 22 and 26 so that of the contact element 28 and from the main body 12 or the receiving element 21 and the pressing element 24 limited space forms an annulus.

The investment element 28 is conically formed on an outer side, so that the outer diameter in the direction of the base body 12 connected end increases. On the outside are two in the direction of a central longitudinal axis M _A spaced sealing projections 29 . 30 arranged.

The investment element 28 is hollow cylindrical and has a recess in the form of a through hole 31 on. The investment element 28 is conically formed on an inner side, so that the passage opening 31 rejuvenated. On the inside, the attachment element 28 an internal thread 32 in which a second connection element 33 with an associated external thread 34 can be screwed. The connection element 33 used when screwing as a spreading element for the contact element 28 , The connection element 33 is also hollow cylindrical and has a through hole 35 on. The second sealing unit 14 serves to seal the receiving space 6 opposite the interior 8th ,

The passage opening 20 of the first connection element 18 and the annular body interior 15 form a first channel 36 for feeding the matrix material 2 in the recording room 6 , The passage opening 31 of the contact element 28 and the through hole 35 of the second connection element 33 form a second channel 37 for adjusting the internal pressure p _i in the interior 8th ,

To avoid a narrowing of the receiving space 6 is a spacer 38 provided in the recording room 6 is insertable. The spacer 38 is hollow cylindrical and has a plurality of spacer channels 39 for the matrix material 2 on. The spacer 38 has in the direction of the central longitudinal axis M _{A has} a length L _H , which is greater than a distance L _{S of} the connection element 18 to the distal end of the receiving element 21 is. On the one hand, this ensures that in the area of the first sealing unit 13 the recording room 6 is not narrowed and on the other hand, a contact with the connection element 18 is possible.

To supply power to the reinforcing fibers 7 are the connection element 18 and the spacer 38 electrically conductive and in contact with each other. The connection element 18 and the spacer 38 are preferably made of metal.

For closing an opposite end of the interior 8th indicates the feeding system 1 a closure device 40 on. The closure device 40 includes a second body 41 , which is formed hollow cylindrical and a second main body interior 42 limited. At the base body 41 is a discharge element 43 arranged, which has a through hole 44 formed. The discharge element 43 is, for example, according to the connection element 18 trained and screwed.

The closure device 40 has a third sealing unit 45 on, corresponding to the first sealing unit 13 is trained. The sealing unit 45 accordingly has a third receiving element 46 with a receiving opening 47 and an associated external thread 48 on. The receiving element 46 is integral with the body 41 educated. An associated pressing element 49 has a receiving opening 50 and an internal thread 51 on. Between the receiving element 46 and the pressing element 49 is an elastic sealing element 52 arranged.

For closing the interior 8th has the closure device 40 an investment element 53 on that in the interior 8th is insertable and two along a central longitudinal axis M _V arranged sealing projections 54 . 55 having. The investment element 53 is integral with the body 41 educated.

To a narrowing of the recording room 6 in the area of the sealing unit 45 to avoid and to allow a power supply, has the closure device 40 a spacer 56 with spacer channels 57 on.

The connection device 9 and the closure device 40 are formed of a plastic material. An exception to this are the electrically conductive spacers 38 . 56 and the electrically conductive connection element 18 and the electrically conductive discharge element 43 which are formed of metal. Alternatively, the connection device 9 and the closure device 40 be made entirely of metal.

To an undesirable deformation of the outer wall element 5 during introduction of the matrix material 2 to avoid, points the feeding system 1 a component shape 59 on, which is formed of two firmly connectable mold halves. The component form 59 forms a cavity open at the end, which is used to hold the structural component semifinished product 3 serves.

The component form 59 or the cavity thereof has a circular cross-sectional shape, that of the circular cross-sectional shape of the structural component semifinished product 3 corresponds, so that arranged in the cavity structural component semi-finished 3 with the outer wall element 5 against the component form 59 is applied. The component form 59 is made of a non-metallic material, such as wood or a modeling material.

For generating a current flow through the reinforcing fibers 7 indicates the feeding system 1 an electrical energy source 70 on that with the first connection element 18 and the discharge element 43 is electrically connected. By means of the electric energy source 70 is to the reinforcing fibers 7 a voltage U can be applied.

The assembly and operation of the delivery system 1 is as follows:
First, the spacers 38 and 56 end through openings A ₂ , B ₂ in the receiving space 6 introduced. For mounting the connection device 9 becomes the contact pressure element 24 and the connection element 33 solved. Subsequently, the structural component semifinished product 3 with its end in the receiving openings 26 and 22 introduced so that the contact element 28 at the same time through an opening A ₁ in the interior 8th is introduced. Subsequently, the pressing element 24 on the contact element 21 screwed on, so that by means of the first sealing unit 13 a sealing effect is achieved. The sealing effect is achieved by pressing the receiving element 21 to the outer wall element 5 as well as by deformation and installation of the sealing element 27 on the wall element 5 achieved. Furthermore, the connection element 33 in the contact element 28 screwed in, causing the contact element 28 with a higher contact pressure against the inside of the inner wall element 4 is pressed. In this way and through the sealing projections 29 . 30 a sealing effect is achieved. By attaching the connection device 9 is the connection element 18 in contact with the spacer 38 ,

At the opposite end of the structural component semifinished product 3 In a corresponding manner, the closure device 40 assembled. For mounting the closure device 40 becomes the contact pressure element 49 solved. The structural component semifinished product 3 is then in the receiving openings 50 and 47 introduced, whereby the contact element 53 through an opening B ₁ at the same time in the interior 8th is introduced and this due to the sealing projections 54 . 55 closes. For fastening the closure device 40 becomes the contact pressure element 49 on the receiving element 46 screwed.

Subsequently, the pump 10 with the connection element 18 and the pump 11 with the connection element 33 connected. Furthermore, the electrical energy source 70 with the connection element 18 and the discharge element 43 electrically connected and by means of the energy source 70 a voltage U to the reinforcing fibers 7 created so that there is a current flow through them. Due to the current flow, the connection devices 9 , the structural component semi-finished product 3 and the closure device 40 heated. This will increase the viscosity of the matrix material 2 lowered during insertion, so that the introduction is simplified.

By means of the pump 10 becomes the matrix material 2 with a pressure p _m or overpressure in the receiving space 6 brought in. The matrix material 2 flows through the passage opening 20 , the main body interior 15 and the spacer channels 39 in the recording room 6 ,

Is the recording room 6 filled, so flows the Materixmaterial 2 through the spacer channels 57 , the main body interior 42 and the through hole 44 in the nearby areas 58 , The sealing unit 13 seals the recording room 6 from the surroundings 58 from. Accordingly seals the sealing unit 45 the recording room 6 from the surroundings 58 off, leaving the matrix material 2 only by the discharge element 43 exit and can be caught there.

Will be the matrix material 2 introduced with a high pressure difference to the ambient pressure, in particular with a high pressure p _m or a high pressure, the internal pressure p _i must be adjusted in order to avoid a deterioration in the quality of the later fiber-reinforced structural component. For this purpose, by means of the second pump 11 the internal pressure p _i via the second channel 37 set. Will be the matrix material 2 introduced with an overpressure, so by means of the second pump 11 a pressure medium, such as air, in the interior 8th pumped. As a result, an undesirable deformation of the inner wall element 4 avoided. To avoid undesirable deformation of the outer wall element 5 is additionally the the outer wall element 5 surrounding component shape 59 be used.

After introducing the matrix material 2 must the structural component semi-finished 3 cure in its at least partially curved desired shape. For easy insertion of the matrix material 2 and for accelerating the curing is applied to the terminal 18 and the discharge element 43 the electrical voltage U is applied, so that via the connecting element 18 , the spacer 38 , the reinforcing fibers 7 , the spacer 56 and the discharge element 43 a current flow is generated, which is the matrix material 2 during insertion and in the receiving space 6 heated.

The heat accelerates curing. After curing, a fiber-reinforced structural component is formed.

Disassembly of the connection device 9 and the closure device 40 follows after curing in the reverse manner to the assembly.

The following is based on 2 A second embodiment of the invention described. The receiving element 21 the sealing unit 13 is not flush with the body in contrast to the first embodiment 12 educated. The receiving element 21 has a hollow cylindrical portion 60 and a tapered section 61 on, which are integrally formed with each other. At the section 60 is the external thread 23 educated. At the section 61 is on the outer wall element 5 facing inside the elastic sealing element 27 arranged. The sealing element 27 is designed for example as a ring with a rectangular cross-section or as a band. With regard to the further construction of the delivery system 1 is referred to the first embodiment. With regard to the assembly, operation and disassembly reference is also made to the first embodiment.

The following is based on 3 A third embodiment of the invention described. The third embodiment differs from the first embodiment by the formation of the second sealing unit 14 , The second sealing unit 14 has a second receiving element 62 with an associated receiving opening 63 on. The receiving element 62 is at a the receiving element 21 opposite side of the body 12 arranged and formed integrally with this. The receiving element 62 has an external thread 64 on, by means of an internal thread 65 an associated second pressing element 66 can be screwed on. The pressing element 66 points according to the first sealing unit 13 a tapered inner diameter for adjusting the contact pressure of the receiving element 62 to the wall element 4 on.

The investment element 28 is concentric with the central longitudinal axis M _V on the contact pressure element 66 arranged and formed integrally with this. The pressing element 66 has a concentric with the central longitudinal axis M _V arranged receiving opening 67 for insertion of the connecting element 33 on.

In the screwed-on state of the contact pressure element 66 forms the contact element 28 with the receiving element 62 a gap 68 for clamping the wall element 4 out. The receiving opening 63 tapers in its inner diameter in the direction of the contact element 28 so that the receiving element 62 at its free end an annular clamping edge 69 formed. With regard to the further construction of the delivery system 1 Reference is made to the preceding embodiments, in particular the first embodiment.

For mounting the connection device 9 becomes the outer wall element 5 end of the structural component semi-finished product 3 removed, leaving the inner wall element 4 with the reinforcing fibers arranged thereon 7 exposed. The length of the part of the outer wall element to be removed 5 depends on the size of the structural component semi-finished product 3 and the associated connection device 9 from. Typically, the length to be removed is between 2 cm and 10 cm. In the recording room 6 becomes the spacer 38 introduced, with a free end outside the receiving space 6 remains.

The screw connection of the first sealing unit 13 will be solved first. The pressing element 66 gets completely from the receiving element 62 away. In addition, the connection element 33 from the contact element 28 away. Subsequently, the structural component semifinished product 3 through the receiving openings 26 and 22 in the main body interior 15 introduced. The insertion takes place until the outer wall element 5 the end of the receiving element 21 or the basic body interior 15 has reached and the inner wall element 4 through the receiving opening 67 again from the main body interior 15 exit.

In this position of the structural component semifinished product 3 first becomes the contact pressure element 24 on the associated receiving element 21 screwed so that this in the radial direction against the outer wall element 5 pressed and the elastic sealing element 27 is deformed, so that this to rest against the outer wall element 5 comes. The recording room 6 is by the pressing of the receiving element 21 to the outside of the outer wall element 5 as well as through the elastic sealing element 27 opposite the environment 58 sealed. Subsequently, the pressing element 66 on the receiving element 62 screwed, thereby simultaneously the contact element 28 in the interior 8th is introduced. Due to the conical design of the contact element 28 becomes the inner wall element 4 increasingly stretched, at the same time due to the formation of the receiving element 62 the gap 68 increasingly shrinking until the clamping edge 69 the inner wall element 4 stuck. This results in two sealing points, namely on the one hand, the flat sealing point or the flat sealing area on the contact element 28 and on the other hand, the sealing point on the clamping edge 69 , causing the interior 8th extremely reliable and effective against the recording room 6 is sealed.

After mounting the contact pressure element 66 becomes the connecting element 33 with the external thread 34 in the internal thread 32 screwed.

Regarding the further assembly of the feeding system 1 , in particular the closure device 40 and the pumps 10 . 11 Reference is made to the first embodiment. Regarding the operation of the delivery system 1 and the disassembly is also referred to the first embodiment.

By the connecting device according to the invention 9 becomes a simple and fast introduction of matrix material 2 in the recording room 6 allows, which are achieved for industrial use low cycle times in the production of fiber-reinforced structural components. In particular, by the connecting device according to the invention 9 the introduction of matrix material 2 with a high pressure p _m or overpressure, allowing the receiving space 6 can be formed with a comparatively small radial dimension, so that the later fiber-reinforced structural component has a comparatively low weight. By adjusting the internal pressure p _i in the interior 8th becomes a geometry control of the inner wall element 4 and the reinforcing fibers 7 allows so that fiber distortions or fiber compaction can be effectively avoided and the later fiber-reinforced structural component has a high quality. For the pressure p _m applies in particular: p _m ≥ 1.5 bar, in particular p _m ≥ 3.0 bar, in particular p _m ≥ 4.5 bar, and in particular p _m ≥ 6.0 bar.

Due to the surface contact pressure or the surface pressure of the sealing units 13 . 14 on the one hand, a frictional connection between the structural component semi-finished product 3 and the connection device 9 achieved and on the other hand, a simultaneous introduction of matrix material 2 and allows adjustment of the internal pressure p _i , since the receiving space 6 opposite the environment 58 and opposite the interior 8th is sealed.

At the connection device 9 According to the first and second embodiments, a direct mounting on the cut structural component semifinished product 3 possible, allowing a shortening of the outer wall element 5 and optionally the reinforcing fibers 7 can be avoided.

In contrast, the connection device 9 according to the third embodiment, a second sealing unit 14 with a high sealing effect ready, because due to the conical clamping two sealing points are generated.

The spacer 38 ensures a simple introduction of the matrix material despite the flat radial contact pressure 2 with the least possible resistance. At the same time, the spacer allows 38 in conjunction with the spacer 56 the closure device 40 a current flow for accelerated curing of the matrix material 2 , In addition, the connection device 9 before introducing the matrix material 2 by a current flow over the reinforcing fibers 7 be heated to up to 80 ° C, the viscosity of the matrix material 2 and whose flow properties are positively influenced.

An embodiment of the connection device 9 and / or the closure device 40 Made of plastic material - with the exception of the electrically conductive components - is simple and inexpensive. In contrast, allows an embodiment of the connection device 9 and / or the closure device 40 Made of metal for easy cleaning and reuse.

By the connecting device according to the invention 9 is an introduction of the matrix material 2 with a pressure p _m and an associated internal pressure p _i of up to 20 bar possible. Through the passage opening 44 of the discharge element 43 can the in the recording room 6 air present during insertion of the matrix material 2 escape. To the introduction of the matrix material 2 To facilitate, can in the interior 8th Hot air or steam are introduced. This causes a heating of the connection device 9 possible, whereby the flow properties of the matrix material 2 be improved. The matrix material 2 points through the heated connection device 9 and the heated structural component semi-finished product 3 a lower viscosity, which allows easier and faster introduction and accelerated curing.

The second wall element 5 has an outer diameter D, for which preferably applies: 10 mm ≤ D ≤ 200 mm, in particular 15 mm ≤ D ≤ 150 mm, and in particular 20 mm ≤ D ≤ 100 mm. The second wall element 5 furthermore has a radial wall thickness W ₂ or W, wherein preferably 5 ≦ D / W ≦ 30 and in particular 10 ≦ D / W ≦ 20. Furthermore, the second wall element has 5 preferably a hardness of at most 100 Shore A, in particular of at most 90 Shore A, and in particular of at most 80 Shore A on. By the formation of the second wall element 5 On the one hand, a sufficient stability to pressure differences between the receiving space 6 and the environment 58 ensures and on the other hand, a deformability or flexibility of the structural component semi-finished product 1 guaranteed. The wall elements 4 . 5 are preferably malleable such that a radius of curvature of the structural component semifinished product 1 of less than 10 D, in particular less than 8 D, in particular less than 6 D, and in particular less than 4 D can be achieved. The wall elements 4 . 5 are preferably formed of plastic, in particular of a thermoplastic material.

The wall thickness W _{1 of} the first wall element 4 and / or the wall thickness W _{2 of} the second wall element 5 can be the same or different.

The wall thicknesses W ₁ and / or W ₂ are preferably between 1 mm and 6 mm, in particular between 1.5 mm and 5 mm, and in particular between 2 mm and 4 mm.

The structural component semifinished product 3 or the wall elements 4 . 5 are tubular, wherein the openings to the receiving space 6 and the interior 8th are formed frontally. The connection device 9 and the closure device 40 are in their cross-sectional shape to the cross-sectional shape of the wall elements 4 . 5 customized.

The structural component semifinished product 3 preferably has a length of less than 10 m, in particular less than 6 m, in particular less than 4 m, in particular less than 3 m, in particular less than 2.5 m and in particular less than 2 m.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2010/129975 A2 [0002]

Claims (29)

Connecting device for introducing matrix material into a receiving space of a structural component semifinished product provided with reinforcing fibers, comprising - a main body ( 12 ), - a first channel ( 36 ) for introducing a matrix material ( 2 ) in a receiving room ( 6 ) of a structural component semifinished product ( 3 ), - a second channel ( 37 ) for adjusting an internal pressure in an interior space ( 8th ) of the structural component semifinished product ( 3 ), - one on the main body ( 12 ) arranged first sealing unit ( 13 ) for sealing the receiving space ( 6 ) against an environment ( 58 ), and - one on the main body ( 12 ) arranged second sealing unit ( 14 ) for sealing the receiving space ( 6 ) in relation to the interior ( 8th ). Connecting device according to claim 1, characterized in that the first sealing unit ( 13 ) comprises: - a first receiving element ( 21 ) with a first receiving opening ( 22 ) for receiving a wall element ( 5 ) of the structural component semifinished product ( 3 ) and - a first pressing element ( 24 ) for radially pressing the first receiving element ( 21 ) to the wall element ( 5 ). Connecting device according to claim 2, characterized in that for pressing the first receiving element ( 21 ) an external thread ( 23 ) and the first pressing element ( 24 ) an associated internal thread ( 25 ) having. Connecting device according to claim 2 or 3, characterized in that the first pressing element ( 24 ) has a tapered inner diameter for setting a contact pressure. Connecting device according to one of claims 1 to 4, characterized in that the first sealing unit ( 13 ) at least one elastic sealing element ( 27 ) for abutment against a wall element ( 5 ) of the structural component semifinished product ( 3 ) having. Connecting device according to claim 5, characterized in that a sealing element ( 27 ) between the first receiving element ( 21 ) and the first pressing element ( 24 ) is arranged. Connecting device according to claim 5 or 6, characterized in that a sealing element ( 27 ) on a wall element ( 5 ) facing inside of the first receiving element ( 21 ) is arranged. Connecting device according to one of claims 2 to 7, characterized in that the first receiving element ( 21 ) in one piece with the main body ( 12 ) is trained. Connecting device according to one of claims 1 to 8, characterized by at least one spacer ( 38 ) for insertion into the receiving space ( 6 ). Connecting device according to claim 9, characterized in that a spacer ( 38 ) is hollow cylindrical and at least one spacer channel ( 39 ) for the matrix material ( 2 ) having. Connecting device according to claim 9 or 10, characterized in that the at least one spacer ( 38 ) is electrically conductive and in contact with a first electrically conductive connection element ( 18 ). Connecting device according to one of claims 1 to 11, characterized in that a on the base body ( 12 ) arranged first connecting element ( 18 ) at least a part of the first channel ( 36 ) trains. Connecting device according to one of claims 1 to 12, characterized in that the second sealing unit ( 14 ) an investment element ( 28 ) for insertion into the interior ( 8th ) and against a wall element ( 4 ) of the structural component semifinished product ( 3 ) having. Connecting device according to claim 13, characterized in that the contact element ( 28 ) is conically formed on an outer side. Connecting device according to claim 13 or 14, characterized in that the contact element ( 28 ) a recess ( 31 ) and a second connecting element ( 33 ) in the recess ( 31 ) is insertable. Connecting device according to claim 15, characterized in that the contact element ( 28 ) is conically formed on an inner side and the second connecting element ( 33 ) in particular an external thread ( 34 ), which in an internal thread ( 32 ) of the contact element ( 28 ) can be screwed. Connecting device according to one of claims 13 to 16, characterized in that the contact element ( 28 ) and in particular the second connection element ( 33 ) the second channel ( 37 ) train. Connecting device according to one of claims 13 to 17, characterized in that the Investment element ( 28 ) in one piece with the main body ( 12 ) is trained. Connecting device according to one of claims 13 to 17, characterized in that the second sealing unit ( 14 ) comprises: - a second receiving element ( 62 ) with a second receiving opening ( 63 ) for receiving a wall element ( 4 ) of the structural component semifinished product ( 3 ) and - a second pressing element ( 66 ) for radially pressing the second receiving element ( 62 ) to the wall element ( 4 ). Connecting device according to claim 19, characterized in that the contact element ( 28 ) with the second receiving element ( 62 ) a gap ( 68 ) for clamping the wall element ( 4 ) trains. Connecting device according to claim 20, characterized in that the second receiving element ( 62 ) a clamping edge ( 69 ) trains. Connecting device according to one of claims 19 to 21, characterized in that for pressing the second receiving element ( 62 ) an external thread ( 64 ) and the second pressing element ( 66 ) an associated internal thread ( 65 ) having. Connecting device according to one of claims 19 to 22, characterized in that the second pressing element ( 66 ) has a tapered inner diameter for setting a contact pressure. Connecting device according to one of claims 19 to 23, characterized in that the contact element ( 28 ) in one piece with the second pressing element ( 66 ) is trained. Connecting device according to one of claims 19 to 24, characterized in that the second receiving element ( 62 ) in one piece with the main body ( 12 ) is trained. Connecting device according to one of claims 1 to 25, characterized in that the basic body ( 12 ) is formed of a plastic material. Connecting device according to one of claims 1 to 25, characterized in that the basic body ( 12 ) is formed of a metal. Feeding system with - a connecting device ( 9 ) according to at least one of claims 1 to 27, - a closure device ( 40 ) for closing the interior ( 8th ) of the structural component semifinished product ( 3 ), - a first pump ( 10 ) for introducing matrix material ( 2 ) in the reception room ( 6 ) of the structural component semifinished product ( 3 ), and - a second pump ( 11 ) for adjusting the internal pressure in the interior space ( 8th ). Method for feeding matrix material into a receiving space of a structural component semifinished product provided with reinforcing fibers, comprising the following steps: - providing a structural component semifinished product ( 3 ) with - a first wall element ( 4 ), - one the first wall element ( 4 ) surrounding second wall element ( 5 ), - a recording room ( 6 ), which in a transverse direction (Q) of the wall elements ( 4 . 5 ) is limited and in a longitudinal direction (L) between the wall elements ( 4 . 5 ), - an interior ( 8th ), which in the transverse direction (Q) of the first wall element (Q) 4 ), - in the receiving room ( 6 ) arranged reinforcing fibers ( 7 ), - a first opening (A ₁ ) for adjusting an internal pressure in the interior space ( 8th ), and - a second opening (A ₂ ) for introducing flowable matrix material ( 2 ) in the reception room ( 6 ), - providing a delivery system ( 1 ) according to claim 28, - attaching the connecting device ( 9 ) and the closure device ( 40 ) to a structural component semifinished product ( 3 ), - connecting the first pump ( 10 ) with the first channel ( 36 ), - connecting the second pump ( 11 ) with the second channel ( 37 ), - introduction of matrix material ( 2 ) through the second opening (A ₂ ) into the receiving space ( 6 ) by means of the first pump ( 10 ) through the first channel ( 36 ), and - adjusting the internal pressure in the interior ( 8th ) via the first opening (A ₁ ) by means of the second pump ( 11 ) over the second channel ( 37 ).

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