Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
  • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
  • B29C70/28—Shaping operations therefor
  • B29C70/40—Shaping or impregnating by compression not applied
  • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
  • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
  • B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C33/00—Moulds or cores; Details thereof or accessories therefor
  • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
  • B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C33/00—Moulds or cores; Details thereof or accessories therefor
  • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
  • B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
  • B29C53/80—Component parts, details or accessories; Auxiliary operations
  • B29C53/82—Cores or mandrels
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C33/00—Moulds or cores; Details thereof or accessories therefor
  • B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
  • B29C2033/422—Moulding surfaces provided with a shape to promote flow of material in the mould cavity
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
  • B29C64/10—Processes of additive manufacturing
  • B29C64/165—Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber

Definitions

• the present invention relates to a method for producing a fiber-reinforced structural hollow component, in which a mandrel is produced, the mandrel and fibers are introduced with a matrix material in a mold, so that a first fiber unit with the matrix material for at least partially forming a component wall between the mandrel and the mold, the matrix material for forming the hollow structural member is cured due to a temperature and / or pressure change and the mold core is rinsed after curing to form a component cavity from the hollow structure member. Furthermore, the invention relates to a mold core for use in such a manufacturing method. Furthermore, the present invention relates to a structural hollow component made of a fiber composite material with a component wall, a component cavity formed in the interior of the component wall and at least one reinforcement element extending through a component cavity, in particular a reinforcement strut.
• Fiber-reinforced components have reinforcing fibers, in particular carbon fibers, glass fibers and / or aramid fibers, which are embedded or incorporated in a, in particular thermoplastic and / or thermosetting, matrix.
• the reinforcing fibers give the component the necessary strength or rigidity.
• the matrix on the other hand, has the primary effect of keeping the reinforcing fibers in a desired shape. The reinforcing fibers are thus aligned, supported and protected by the matrix.
• each stiffening strut is cylindrical segment-shaped cores wrapped with fiber material and then positioned by means of a position aid to each other.
• a mandrel is surrounded by winding technology with reinforcing fibers. The method described is extremely complicated and requires many individual steps to form the reinforcing struts.
• the object is achieved by a method for producing a fiber-reinforced structural hollow component, a mandrel, a method of use of the mandrel and a structural hollow component with the features of the independent claims.
• the mandrel and fibers are introduced with a matrix material in a mold.
• the fibers may be provided in the form of short cut fibers, short cut threads, continuous filaments, tapes, fabric mats, mats and / or prepregs.
• prepreg refers to tapes, fabric mats or fabric sheets which are preimpregnated with a resin, preferably a thermosetting matrix material, and optionally pre-cured.
• the matrix material is preferably an epoxy resin or polyurethane resin, in particular a one-, two- or three-component resin. From the first fiber unit and the matrix material at least partially a component wall of the hollow structure component is formed. The initially viscous thermosetting and / or thermoplastic matrix material is cured to form the structural hollow component as a result of a change in temperature and / or pressure. For this purpose, the mold is closed and pressurized or temperature applied. The mandrel is a soluble core. Furthermore, this preferably expands as a result of the change in the ambient conditions, so that at least the first fiber unit is pressed together with the matrix material against the mold. After curing of the matrix material, the mold core is rinsed out of the hollow structure component in order to form a component cavity.
• At least one channel extending through the mandrel is formed in the mandrel.
• the channel is uroformed in the mold core production together with the mold core.
• the channel is in this case formed during the manufacture of a base body of the mold core in this.
• a workpiece in this case the mandrel with its channel, is created from an informal material.
• the aim is to create a substance cohesion and thereby produce a first form of a geometrically solid body.
• the mold core is preferably in one piece, so that the process can be designed as simple and with a few steps.
• a second fiber unit is introduced, which may be formed, for example, as tissue, scrim, and / or such tubes.
• this second fiber unit may also be formed as short-cut fibers, filaments or continuous filament.
• the second fiber unit can be an already soaked but also non-saturated fiber.
• the matrix material is introduced into the channel.
• a reinforcing element in particular the reinforcing strut, is formed exclusively by the matrix material.
• the second fiber unit and / or the matrix material are introduced into the channel in such a way that after hardening of the matrix material and flushing of the mold core, the reinforcing element, in particular the reinforcing strut, is formed in the structural hollow component.
• the reinforcing element in particular the reinforcing strut, extends through the component cavity.
• the reinforcing element is in the region of its two ends in particular positively and / or materially connected to the component wall.
• the manufacturing method of the structural hollow component can thus be realized easily and quickly.
• the fact that the mold core is produced together with its at least one channel in one process step the manufacturing process can be very time-saving and thus cost-effective.
• the reinforcing element, in particular the reinforcing strut, by its connection with the component wall of the structural hollow component is a measure for stability preservation even under extreme conditions, so that the quality is permanently ensured.
• a very lightweight fiber-reinforced structural hollow component can be formed by the present method, since the core does not remain in the cavity of the hollow structural member, but is removed again.
• the at least one channel and / or a feed channel- which is intended to rapidly conduct a solvent into the interior of the mold core-together with the mold core in a rapid prototyping method, in particular a 3D printing method, is formed or urgeformt the mold core together with its at least one channel and / or the feed channel in a rapid prototyping method.
• a rapid prototyping method in particular a 3D printing method
• the mold core can be produced very quickly and inexpensively together with its channel.
• the production of the mold core is not localized. This allows mold core geometries to be sent virtually to customers, who can then express them locally on their own 3D printer.
• the reinforcing element is at least one reinforcing wall (in particular closed over its entire surface, so that preferably two separate chambers are formed), a reinforcing strut, a framework and / or a reinforcing structure. Furthermore, it is advantageous if the reinforcing element is hollow. Also, the reinforcing element may be at least partially rectilinear and / or curved. The reinforcing element may have an X and / or a Y-shape.
• the first fiber unit is wound around the mandrel.
• the first fiber unit is preferably formed by a preimpregnated continuous fiber.
• the first fiber unit may be laid around the mandrel as a prepreg. It is initially irrelevant whether the fibers are already impregnated with matrix material or not.
• the wrapped mandrel is introduced into the mold for shaping.
• the matrix material is injected after closing the molding tool.
• the fibers of the first and the second fiber unit are impregnated with matrix material so that they are held in position after it has hardened and can transmit and distribute any stresses occurring in the component wall and the reinforcing strut.
• the matrix material is advantageously injected into the channel from the side of the mold core facing the mold.
• the mandrel has at least one channel opening, via which the matrix material is passed through the first fiber unit into the channel. Furthermore, it is bar, to pressurize the matrix material so that it is pressed directly through the first fiber unit so that it penetrates into the channel provided for it.
• the second fiber unit is preferably arranged so that it is impregnated with the pressed-matrix material.
• the reinforcing strut is formed only by the matrix material.
• the matrix material is injected into the channel through the feed channel, which is preferably connected to the channel in the region between its two channel openings.
• the feed channel extends at least from the region of the mold from which the matrix material is injected to the channel.
• the matrix material can be directed to the channel in a targeted manner. Since the supply of the directly accessible to the solvent surface of the mandrel is considerably increased, its rinsing is facilitated.
• the channel is advantageously formed before arranging the first fiber unit on the mold core.
• the channel is straight, bent and / or bent. Additionally or alternatively, it is advantageous if the channel is formed with at least two undercuts spaced apart from one another in its longitudinal extension or longitudinal direction.
• the channel may also have a free-form geometry. It can also be composed of a plurality of identical and / or different projecting sections. As a result, the later form of the reinforcing strut can be adapted individually to the required rigidity.
• first a first longitudinal half of the channel is formed in a first mold core part and the other longitudinal half section is formed in a second mold core part.
• These two molded core parts are then connected to one another so that the finished channel, which is open only at its two ends, is removed. is formed.
• the shape of the channel or the reinforcing strut can thus be easily adapted to a wide variety of conditions.
• the fibers of the second fiber unit are introduced into the channel by means of a, in particular mechanical and / or pneumatic, introduction device.
• the mechanical insertion device is, for example, a, in particular flexible, needle.
• the fibers of the second fiber unit are introduced, for example, by means of the needle into the mold core, so that the fibers extend from the first channel opening to the second channel opening.
• the first channel opening is a fiber inlet opening and the second channel opening is a fiber outlet opening, wherein this can also be reversed.
• the fibers of the second fiber unit are introduced into the channel by means of an air flow.
• the fiber introduction would therefore take place with a pneumatic introduction device, in particular a nozzle.
• the channel was urformed before the blowing of the fibers together with the core or during its production, in principle, any conceivable channel shape is possible.
• the fibers can be injected through one of the two channel openings so that they emerge again from the other channel opening and thus extend completely through the channel.
• the channel in this case has no further openings between its two end openings.
• the blowing of the fibers makes it possible to form the channel in many ways, since the introduction of the fibers can be independent of its shape.
• the two channel openings can be formed only on the mold core itself.
• the first fiber unit has the two channel openings.
• the placement of the channel openings may vary with the first fiber unit depending on the manufacturing process and the time of wrapping the mandrel. If, for example, a fiber mat is placed in the mold, then it makes sense to form the channel and the second fiber unit prior to insertion into the mold. Consequently, only the mandrel would have the channel openings, but not the first fiber unit. If, however, the first fiber unit is first placed around the mold core and then the second fiber unit is introduced into the channel, the first fiber unit also has at least one of the two channel openings, since the first fiber unit must be penetrated by the second fiber unit.
• the second fiber unit is connected to the respective assigned area of the first fiber unit, in particular material and / or form-fitting manner.
• the second fiber unit is preferably connected at its two ends to the first fiber unit to form two connecting portions.
• the fibers of the second fiber unit are joined to the first fiber unit, in particular sewn.
• the two fiber units can thereby be firmly connected to each other, so that a particularly high stability is ensured.
• the forces occurring at the junction can be effectively transferred without loss.
• At least one of the two connection regions is formed on an outer side of the first fiber unit.
• a slot or an opening is preferably cut into the first fiber unit.
• the second fiber unit is then passed through this opening.
• the second fiber unit can be introduced with both the pneumatic and the mechanical introduction device.
• the fibers of the second fiber unit can be introduced by means of the air flow or the nozzle, in particular if the channel extends from the outside of the first fiber unit through the mold core to the opposite other outside of the first fiber unit.
• the respectively protruding end of the second fiber unit is folded onto the outside of the first fiber unit.
• the injected and hardened matrix material may already be sufficient.
• At least one of the two connection regions is advantageously formed on an inner side of the first fiber unit.
• the second fiber unit is first introduced into the channel, the protruding ends of which are then folded onto a circumference of the mold core. The mandrel is then wrapped with the first fiber unit. In order to form secure joints, these two fiber units can be additionally sewn together.
• the first fiber unit can be wound several times around the mandrel or else laid around the mandrel in the form of a fiber mat. the.
• the fiber layer is penetrated with a part of the fibers of the second fiber unit, in particular pierced or, if a slot or an opening was formed, through-pushed. The protruding end of this part is folded on the outside of the first fiber layer and / or sewn thereto.
• the feed channel of the mandrel is filled prior to injecting the matrix material with a filler, in particular with an expansion material such as wax.
• the matrix material is pressed during its injection into the mold through the first fiber unit into the channel of the mold core, so that the second fiber unit is impregnated with the matrix material.
• the filling channel filled with filling material ensures that only the channel is enriched with the matrix material.
• the feed channel, which ultimately serves for improved rinsing out of the mold core, is thus kept free.
• the filler material is rinsed out after curing of the matrix material together with the mold core, so that the mold core can be ideally removed by means of the solvent from the hollow structure component.
• the mandrel expands advantageously at temperature increase. This enlarges a mandrel cross-section, so that the first fiber unit embedded in the matrix material is pressed outward against a negative mold of the forming tool. All air bubbles located in the fiber units and the matrix material can thereby be efficiently removed from the component so that its quality is ensured. Furthermore, it is advantageous if, after curing of the matrix material, the solvent is rinsed into the feed channel of the mold core, so that the mold core is released from the hollow structure component. Alternatively or additionally, it is advantageous if the solvent is rinsed onto a cross section of the mold core.
• the mandrel which is, for example, a sand core or a salt core, can be flushed out of the structural hollow component, in particular reliably and almost without residue, by the feed channel.
• a mold core for and / or for use in a method for producing a fiber-reinforced structural hollow component according to the preceding description, wherein said features may be present individually or in any desired combination.
• the mold core can be rinsed out of the hollow structural component after curing of the hollow structural component to form a component cavity.
• At least one channel extending therethrough is formed in the mold core, which is formed into a mold together with the mold core during mold core production, in particular in a rapid prototyping method.
• a structural hollow component made of a fiber composite material having a component wall. Inside the component wall, a component cavity is formed. At least one reinforcing element, in particular a reinforcing element, extends through this component cavity. strut.
• the structural hollow component is designed according to the preceding description, wherein said features may be present individually or in any desired combination.
• the structural hollow component is designed to be extremely stable, since the reinforcing element, in particular the reinforcing strut, extends over the entire component cavity and thus has a supporting effect.
• the loads occurring in the component can be efficiently routed so that the component can withstand high stresses reliably.
• the reinforcing element in particular the reinforcing strut, at its ends in a respective connection region materially and / or positively connected to the component wall, in particular sewn, is. A tearing of the reinforcing strut due to excessive loads is thereby prevented in a structurally simple manner.
• FIG. 1 is a front view of a mold core
• Figure 2 is a front view of a second embodiment of a
• FIG. 3a shows a sectional view of a longitudinal section half of a third embodiment of a mold core with a channel
• Figure 3b is a sectional view of a second longitudinal section half of the third
• FIG. 3 c shows a front view of a mold core according to the third exemplary embodiment
• FIG. 4 is a sectional view of a mandrel-wrapped mandrel
• FIG. 5 shows a schematic sectional view of a molding tool with a mold core
• Figure 6 is a schematic sectional view of a second Aussolidu
• a mold with a mold core For example, a mold with a mold core
• Figure 7 is a sectional view of another embodiment
• FIG. 8 shows a sectional view of a structural component with a mold core
• 9a is a sectional view of a structural component with a reinforcing element, in particular a reinforcing strut, and
• FIG. 9b shows a sectional view of a structural component according to FIG. 9a
• FIG. 1 shows a front view of a mold core 1.
• the mold core 1 is provided for producing a structural hollow component 2, not shown, (see FIGS. 9a, 9b).
• the mold core 1 is preferably made of granules, in particular sand, which are held together by a binder, in particular an adhesive.
• the mandrel 1 preferably expands as a result of an increase in temperature, so that its volume 3 increases.
• Figure 2 shows a second embodiment of the mandrel 1, which in the present case is preferably formed in one piece.
• the mold core 1 has a channel 4 with a first channel opening 5 and a second channel opening 6.
• the channel 4 is preferably formed with the mold core 1 in a rapid prototyping process, in particular a 3D printing process. Furthermore, it extends through the entire mold core 1 or according to the illustration over its entire height. In the present case, the channel 4 is formed in a straight line. In an embodiment not shown here, the channel 4 may additionally or alternatively kinked and / or, as shown in Figure 3a and 3b, to be bent.
• the channel 4 is formed with at least two undercuts spaced apart from one another in its longitudinal extension or longitudinal direction (compare FIGS. 3a and 3b).
• the channel 4 may also have a free-form geometry. It can also be composed of a plurality of identical and / or different projecting sections.
• FIGS. 3 a and 3 b each show one half of a multi-part mold core 1 with a urge-formed channel 4, in particular produced in a rapid prototyping process.
• FIG. 3 c shows this mold core assembled in a cross-sectional view.
• the mold core 1 has a first mold core part 7 and a second mold core part 8.
• a first longitudinal half section 9 is formed into the first shaped core part 7
• a second longitudinal half section 10 is formed into the second part 8.
• the two longitudinal section halves 9, 10 correspond to one another, so that they form the channel 4 when assembled.
• the two mold core parts 7, 8 are connected to one another in a corresponding manner, in particular special glued.
• the mandrel 1 may also be formed in one piece.
• a mandrel 1 is shown, which is wrapped with a first fiber unit 1 1.
• the first fiber unit 11 is formed by a plurality of fibers 12a and may comprise a plurality of superimposed fiber layers. It is irrelevant whether the fibers 12a are staple fibers, continuous fibers or the like. It is also conceivable that the first fiber unit 1 1 is formed by at least one fiber mat.
• the mandrel 1 has a second fiber unit 13. The second fiber unit is formed by fibers 12b.
• the fibers 12b are guided by means of a, in particular mechanical and / or pneumatic, insertion device 31, in particular by means of a nozzle or needle 14, not shown here, through the channel 4 and / or the first fiber unit 1 1.
• the at least one fiber 12b is guided with the introduction device 31 through the mold core 1, in particular its channel 4, and remains at least partially in this.
• the second fiber unit 13 is formed.
• the second fiber unit 13 is guided by the first fiber unit 1 1 and the mandrel 1, in particular engraved.
• the two channel openings 5, 6 are formed on an outer side 17 of the first fiber unit 1 1.
• the channel 4 is formed before the wrapping of the mandrel 1 together with this by a primary molding method, in particular a rapid prototyping method.
• the protruding ends 20 of the fibers 12b of the second fiber unit 13 are folded on the outer side 17 of the first fiber unit 1 1, so that they can be connected to each forming a connection region 21 with this training.
• the fiber layer of the first fiber unit 1 1 can be wrapped on its outside with a second layer, not shown here, so that the ends 20 are embedded between these two fiber layers.
• the channel 4 is urgeformt before introducing the fibers 12 b together with the mandrel 1.
• the fibers 12b of the second fiber unit 13 can then be brought into the channel 4, in particular pulled through or injected, by means of the introduction device 31, in particular by means of the needle 14 or an air flow.
• the needle has according to Figure 4 at its one end a tip 15 for easy insertion and at the other end a Nadelschreib 1 6 for receiving at least a portion of the second fiber unit 13.
• FIG. 5 shows a molding tool 18 in which the mold core 1 is arranged together with the two fiber units 11, 13.
• the fibers were 12 a of the first fiber unit 1 1 wrapped before introducing the mandrel 1 in the mold 18 in alternation with the fibers 12 b of the second fiber unit 13 around the mandrel 1 or introduced into the channel 4.
• the connection regions 21 are formed in the interior of the first fiber unit 1 1.
• matrix material 22 is injected into the mold 18.
• the matrix material 22 is pressed through the first fiber unit 11 into the channel 4 having the second fiber unit 13.
• the two fiber units 1 1, 13 are thereby embedded in the matrix material 22.
• the mandrel 1 expands such that at least the first fiber unit 1 1 is pressed with the matrix material 22 against a negative mold 23 of the molding tool 18.
• the two fiber units 1 1, 13 impregnated with the matrix material 22 retain their predetermined shape even after the curing of the matrix material 22.
• FIG. 6 shows the molding tool 18 with a feed channel 24.
• the feed channel 24 may be formed in one piece together with the at least one channel 4 and the mold core 1, in particular in a rapid prototyping method.
• the feed channel 24 is connected to the channel 4 in the region between the two channel openings 5, 6 with this.
• the matrix material 22 is injected into the channel, preferably in such a way that the first fiber unit 11 is also impregnated with the matrix material 22. After curing of the matrix material 22, it is possible to rinse out the mold core 1 via the feed channel 24.
• the combination of the embodiment of the molding tool described in FIGS. 5 and 6 is conceivable.
• FIG. 7 shows the molding tool 18 with the feed channel 24.
• a filling material 25 is filled into the feed channel 24 here.
• the filler 25 is preferably an expansion material such as wax.
• the matrix material 22 is pressed through the first channel opening 5 through the first fiber unit 11 into the second fiber unit 13. As a result, both fiber units 1 1, 13 are embedded in the matrix material 22. Furthermore, it is possible to fill the channel 4 with the matrix material 22, without first arranging the second fiber unit 13 therein.
• the filling material 25 ensures that the matrix material 22 penetrates only into the channel 4, but not into the feed channel 24 itself. After curing of the matrix material 22, the filling material 25 is flushed out of the feed channel 24. As a result, the feed channel 24 retains its advantageous effect that the mold core 1 can be flushed out by this quickly.
• FIG. 8 shows the two fiber units 1 1, 13 embedded in the matrix material 22 after curing of the matrix material 22.
• the mandrel 1 is still surrounded by the fiber unit 11 and the matrix material 22.
• the connection regions 21 are formed on an inner side 27 of the first fiber unit 1 1.
• the second fiber unit 13 is inserted into the channel 4 before the first fiber unit 11 is wound around the mandrel 1.
• the protruding ends 20 of the fibers 12b of the second fiber unit 13 are folded on a circumference 28 of the mandrel 1.
• a solvent L is flushed into the feed channel 24.
• the soluble mold core 1 in particular its soluble binder, thereby dissolves from the structural component 2.
• the first fiber unit 1 1 embedded in the matrix material 22 consequently forms a component wall 19 of the hollow structural component 2.
• the second fiber unit 13 embedded in the matrix material 22 forms a reinforcing element, in particular a reinforcing strut 26 (see FIGS. 9a, 9b).
• the solvent L can also be rinsed onto a cross section 30 of the mold core 1.
• FIGS. 9a and 9b show the structural hollow component 2 formed according to the described production method from different views.
• the structural hollow component 2 has the component wall 19.
• the component wall 19 delimits a component cavity 29.
• the component cavity 29 extends the reinforcement element, in particular the reinforcement strip. be 26.
• the reinforcing element, in particular the reinforcing strut 26 is connected at its two ends 20 by the respective associated connection portion 21 with the component wall 19.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Composite Materials (AREA)
• Manufacturing & Machinery (AREA)
• Moulding By Coating Moulds (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)
• Casting Or Compression Moulding Of Plastics Or The Like (AREA)

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• 2016
  • 2016-03-04 DE DE102016103979.9A patent/DE102016103979A1/de not_active Withdrawn
• 2017
  • 2017-03-01 JP JP2018565460A patent/JP6971266B2/ja active Active
  • 2017-03-01 WO PCT/EP2017/054740 patent/WO2017148998A1/de not_active Ceased
  • 2017-03-01 US US16/081,636 patent/US11548243B2/en active Active
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