DE102010028981A1 - Mold core for use in molding device for pressend shaping processing of e.g. nonwoven fabrics, has casing filled with fluid, where fluid is partially emptied from casing and casing comprises resilient material with elastomeric properties - Google Patents

Abstract

The mold core (20) has a casing (36) filled with fluid (46), where the fluid is partially emptied from the casing. The casing comprises a resilient material with elastomeric deformation properties. The casing comprises a casing component dimensionally unstable in an unloaded state. The casing comprises a fluid port (51) at an opening longitudinal end region (38) for introducing and/or discharging the filling fluid. The casing is coupled with a filling fluid conduit (52) at the opening longitudinal end region. Independent claims are also included for the following: (1) a molding device (2) a molding process.

Description

The present invention relates to a mandrel for use in pressing processes, in particular for the compression molding of fiber composites, preferably fiber webs, such as fiber webs, which in the initial state, ie prior to shaping, at least one reinforcing fiber material and at least one binder material, preferably thermoplastic binder fiber material include.

Such mandrels are well known in the art. They are used in particular in so-called compression molding processes, in which a raw material, in particular of fiber composite material, is formed into a tubular component, for example. The aforementioned mandrels contribute significantly to the design of the geometry of the inner wall of the tubular component.

However, the known from the prior art and usually rigid mandrels are only very limited useable in the production of tubular components, namely only if their demoldability is ensured from the tubular member.

Since the known from the prior art rigid mandrels on the tubular member only by pulling along a tube longitudinal axis of the molded component is possible, principle can be made with the known mandrels no tubular components with undercuts in the extension direction of the mandrel with the known mandrels.

Another known from the prior art manufacturing method for producing tubular components is the molding of two half shells, in particular of fiber composite material, which are then joined in a separate operation to the tubular member.

In this known method, which is already disadvantageous due to the additionally required joining step, it is inherently not possible to produce half-shells with undercuts against the pressing direction without slide technology.

It is therefore an object of the present invention to provide a technical teaching, with which in particular tubular components by a single Umform or Urformvorgang with, compared to the prior art, greater design freedom at least the inner wall geometry of the component can be produced.

This object is achieved according to a first aspect of the present invention by a generic mold core, which has a shell which can be filled with a filling fluid and from which the filling fluid is at least partially emptied.

By means of the filling fluid optionally fillable or at least partially emptied envelope of the mold core can initially be inserted with a small volume in a mold cavity of a forming tool. After closing the forming tool, the volume of the mold core can then be increased by filling it with filling fluid, so that the mold core finally fills the mold cavity occupied by the raw material substantially without a gap. The at least partial emptying of the shell facilitates the demoulding of the mandrel after the shaping, since in this way the volume occupied by it can be reduced.

Due to the fillability of the shell or of the mold core, the filling fluid can be provided with increasing pressure in the mold core, so that the initially provided in the mold cavity raw material at least or even exclusively by the action of filler filled with fill fluid and emptied mold core or urgeformt can.

In principle, according to a less preferred embodiment according to the invention, it is sufficient if the casing is formed from a material deformable by the filling fluid. In this case, the shell may preferably be formlabil in the unfilled state. To realize the basic idea of the present invention, it is not necessary for the material of the shell to exert restoring forces which counteract its deformation, although this is preferred.

For then, if the shell has an elastic, ie reversibly deformed under force, material, the subsequent forming process subsequent at least partially emptying of the shell to facilitate demolding of the mandrel from the molded component supported by the material elastic restoring forces in an advantageous manner. As particularly suitable elastic materials, materials with elastomeric deformation properties have been found. These can be stretched very much under filling with filling fluid without tearing. In addition, many of these materials are sufficiently temperature resistant to withstand just the elevated operating temperatures encountered in compression molding processes.

The insertion of the mandrel in a mold cavity can be facilitated by the fact that the shell comprises a substantially formlabile shell member in the unloaded state. By "form-labile" is meant a state in which the shell component out of itself once from the outside does not maintain the given shape. This should not be ruled out the case that the shell component gains in shape stability by the filling fluid, in particular under increasing pressure of the filling fluid. For the assessment of the formability of the shell component, the completely emptied, substantially unloaded state of the shell component should be decisive.

Preferably, not only a shell component, but substantially the shell as a whole is a substantially formlabile component, which is particularly preferably formed of an elastic material, in particular a material having elastomeric deformation properties.

Due to the thermal stresses during forming and forming processes, which are caused in particular by the melting of thermoplastic binder material in the umform or urzuformenden raw material, in particular thermally stable materials such as silicone elastomers, especially silicone rubber, or / and thermoplastic polyester elastomers have as suitable elastic materials for the shell or the above-mentioned sheath component.

In a particularly simple embodiment of the present invention it is sufficient if the envelope is an elongated filling fluid-tight component. This component does not necessarily have to be rectilinear, so that it can extend along a longitudinal jacket web, which may be curved with respect to at least one axis of curvature. Thus, with the mandrel of the present invention also curvilinear or even cranked components with internal cavities can be produced and demoulded.

However, due to the easier handling, it is preferred if the mold core is substantially rectilinear and extends along a casing longitudinal axis. In order to facilitate the filling and / or emptying of the envelope, it is expedient if the envelope has a fluid opening for introducing or / and discharging filling fluid at an opening longitudinal end region. In this case, one and the same opening can be used both for introducing and discharging filling fluid, but in principle it can also be envisaged to provide separate openings for introducing and discharging filling fluid into or from the casing.

For example, if components are to be formed using the mold core, which does not completely surround the mold core in the circumferential direction about the casing longitudinal path or casing longitudinal axis, but in which a gap remains in the circumferential direction through which the casing can also be removed from the mold, it may suffice when the shell is formed only hose-like, each with open longitudinal ends. The envelope of the envelope surrounding the envelope longitudinal web is then preferably fluid-tight. At one longitudinal end of the tubular casing, a filling fluid supply line and at the other longitudinal end may be followed by a filling fluid discharge.

In this case, filling fluid can be introduced into the casing from one longitudinal end, and the filling fluid can be discharged from the casing through the other, opposite longitudinal end. It is advantageous if the casing or a fluid line coupled to the casing can optionally be shut off at the outlet-side longitudinal end for fluid flow.

For the filling of filling fluid into the casing, it is therefore sufficient if the casing is closable in a fluid-tight manner at a longitudinal end region, preferably at the longitudinal end region opposite the opening longitudinal end region. However, when components are to be formed with the mandrel which completely surround the fluid core in the finished state in the circumferential direction, it is advantageous if a longitudinal end region of the shell, preferably in turn, the longitudinal end region opposite the opening longitudinal end region, is designed to be fluid-tight this filling fluid can flow out of this longitudinal end. Namely, in this case, after at least partial emptying along the envelope longitudinal path, in particular along the longitudinal axis of the envelope, the mold core can be pulled out of the finished component and thus removed from the mold.

The mold core according to the invention is thus preferably reusable.

For the most automated operation possible of the mold core, it is advantageous if the casing is designed for coupling to a filling fluid line. Through the filling fluid line then filling fluid can be passed via a pressure source from a Füllfluidvorrat in the shell and optionally removed from it again. Particularly preferably, the sheath is formed at its opening longitudinal end to the said coupling. For reasons of simplified maintenance and assembly, the sheath is preferably designed for releasable coupling with the filling fluid line.

Since the shell is to change in shape during operation of the mold core, it is advantageous for the safety of the coupling of the shell with the filling fluid conduit, if the coupling point is formed from a material substantially rigid compared to the material of the shell. Metals are particularly suitable for this purpose. Stainless steel is particularly preferably used for the formation of the coupling point, since this one hand has the necessary mechanical strength and on the other hand the Use of oil or even water as the filling fluid allows, since it is resistant to these fluids.

For the fastest and safest possible coupling and uncoupling of the casing to the filling fluid line or from this, a flange is preferably provided on the casing, which is preferably designed for coupling to a counter flange of the filling fluid line.

Furthermore, in order to limit the amount of filling fluid necessary for the operation of the mold core according to the invention, it can be provided that the casing is designed for coupling to a filling fluid pressure source or / and to a filling fluid supply. Thus, the fill fluid pressure source may deliver fill fluid between the fill fluid reservoir, preferably received in a fill fluid reservoir, and a fill fluid receiving volume within the sheath.

Even if no fill fluid supply is provided, coupling the envelope to a fill fluid pressure source is advantageous because it not only allows filling of the envelope with fill fluid, but also allows the pressure of the fill fluid in the envelope to increase, such that it communicates with the mandrel the envelope a at least partially, preferably completely, for the Um- and / or Urformung a component of raw material necessary pressure can be provided.

The sheath can be coupled in a particularly simple manner via the above-mentioned filling fluid line to the filling fluid pressure source or / and to the filling fluid supply. For reasons of easy maintenance and installation, the coupling is again preferably detachable.

Furthermore, the above-mentioned object according to a second aspect of the present invention is also achieved by a compression molding apparatus, in particular for the compression molding processing of fiber composites, with a, in particular multi-part, mold having a mold cavity, and with a mold core as described above.

For easy and safe releasability of the mandrel according to the invention from the mold cavity of the mold, it is advantageous if the mold cavity along its extension has a smallest inner diameter and the mandrel is determined deformable between a substantially unfilled or minimally filled or / and substantially unpressurized or minimaldruckruckafteten or / and substantially relaxed or minimal voltage-prone basic shape, whose outer diameter at least in a push-through portion of the mandrel, which is inserted in the mold cavity mold core from the location of the smallest inner diameter of the mold cavity to a longitudinal end of the mold core, preferably the longitudinal end of the opening longitudinal end opposite longitudinal end , does not exceed the smallest inner diameter. Particularly preferably, the outer diameter of the mandrel in the push-through portion is twice the wall thickness of the finished component less than the smallest inner diameter of the mold cavity.

The push-through portion of the mandrel is thus that portion which is to fit in a demoulding of the mandrel from the finished or urgeformten component by pulling out of this along the envelope longitudinal path through the smallest inner diameter of the mold cavity or the component therethrough. Due to the preferred elastically stretchable material of the shell, which can be significantly increased after insertion into the mold cavity in the radial direction, it is preferred if the largest outer diameter of the mandrel in its basic shape surrounded substantially over its entire under normal operation of the mold cavity Length does not exceed the smallest inner diameter of the mold cavity. The smallest inner diameter of the mold cavity then forms no barrier to the mold core in the direction of the longitudinal envelope of the casing, so that the mold core can be readjusted with respect to its position relative to the mold cavity in the direction of the casing longitudinal path.

• – Einlegen von zur Formgebung vorgesehenem Rohmaterial, insbesondere Faserverbund-Rohmaterial, in eine Formkavität oder in einen Teil davon eines Formwerkzeugs,
• – Einlegen des Formkerns in die Formkavität oder in einen Teil davon,
• – Schließen eines die Formkavität aufweisenden Formwerkzeugs,
• – Ausüben von Druck auf das Rohmaterial durch Druckbeaufschlagung des Formkerns, insbesondere unter zusätzlicher Kühlung,
• – Öffnen des Formwerkzeugs und
• – Entnahme des geformten Bauteils.

The above object is also achieved according to a third aspect of the present invention by a compression molding method, in particular for press-molding of fiber composites, using a mandrel as described above, and preferably further using a compression molding apparatus as described above , The molding process comprises the following steps:

• Inserting raw material intended for shaping, in particular fiber composite raw material, into a mold cavity or into a part thereof of a molding tool,
• Inserting the mold core into the mold cavity or into a part thereof,
• Closing a molding cavity having the mold cavity,
• Exerting pressure on the raw material by pressurizing the mandrel, in particular with additional cooling,
• - Opening the mold and
• - Removal of the molded component.

This corresponds to a conventional molding process, with which fiber composites, in particular fiber mats, particularly preferably nonwoven fabrics, with a fiber material and a binder material, preferably thermoplastic binder material, particularly preferred fibrous thermoplastic binder material, are made into a component with the predetermined by a mold cavity outer contour.

The raw material thus preferably comprises two types of fiber materials, namely thermoplastic binder fibers, which are melted before the forming process, and thermally stable fiber material, which is not melted during the molding process. The molten thermoplastic binder wets the thermally stable fibers and solidifies upon cooling so that the shape of the component then reached in the mold cavity is substantially maintained.

Therefore, for the above reasons, it is preferable that the step of applying pressure to the raw material includes a step of introducing fill fluid into the mandrel and / or increasing the pressure of fill fluid in the mandrel. Through these steps, as has already been stated several times, pressure is exerted on the raw material in the mold cavity starting from the mold core in the radial direction, so that the mold core makes at least an active contribution to the force exerted on the raw material in the mold cavity for shaping.

In principle, it can be thought that the mandrel is first wrapped with raw material and then the raw material and the mandrel are inserted simultaneously into the mold cavity. On the other hand, for reasons of the shortest possible cycle times, it is preferable that the step of placing raw material in a mold cavity involves a sub-step of placing a first layer of raw material in a lower mold cavity or in a part thereof of a mold and another substep of laying a second layer of raw material has the first layer of raw material, wherein between these sub-steps, the insertion of the mandrel into the mold cavity on the first layer of raw material takes place, so that the mandrel is located after the second substep between the two layers of raw material.

In order to demould the mold core from the produced, finished molded component, it can be advantageous if the method comprises a step of discharging filling fluid from the mold core or / and lowering the pressure of filling fluid in the mold core. Finally, the mandrel may be demolded from the manufactured component by the method comprising a step of withdrawing the mandrel from the molded component.

It should be understood that when the raw material comprises a thermoplastic binder fiber composite material, the above compression molding apparatus advantageously includes cooling means for allowing cooling of the filler fluid so that the mandrel can extract a defined amount of heat from the raw material.

With the solutions described above, in particular channels of fiber material with great geometric freedom, in particular with undercuts in the direction of the channel longitudinal path - which during the shaping process usually coincides with the envelope longitudinal path substantially - and also with undercuts in the pressing direction can be produced.

This is of particular interest to the automotive industry, since such channels of fiber material, in particular Low Weight Reinforced Thermoplastics (LWRT), ie a fiber-reinforced thermoplastic with low weight, as acoustically effective, because sound-absorbing air ducts can be used.

With the help of the mold core presented here, the compression molding apparatus described here and the compression molding process shown here, such acoustically effective air ducts can be completely finished even with complicated geometry in a single manufacturing step.

The present invention will be explained in more detail with reference to the accompanying drawings. It shows:

1 FIG. 2: a rough schematic top view of a compression molding apparatus with a mold core according to the invention before the beginning of a forming process, FIG.

2 : the compression molding device of 1 during the forming process,

3 a side view with partial section of the molding of the 1 and 2 molded component and

4 : a top view of the component of 1 ,

In 1 is a merely roughly schematic and not to scale shown molding apparatus generally with 10 designated. The compression molding device 10 includes, inter alia, a molding tool, of which the lower mold 12 is shown in plan view.

This subform 12 has, as well as the upper mold, not shown, part of a mold cavity 14 into which a fiber composite mat 16 as a starting semifinished product and raw material for the molding with the device 10 component to be manufactured 18 (please refer 3 and 4 ) is inserted.

The fiber composite mat 16 , which comprises fibers of thermoplastic material, which serves as a binder material during the forming process, and which moreover comprises fibers with a higher melting point than that of the binder material, such as mineral fibers, in particular glass fibers, is in the 1 and 2 only in a lower right section of the mold cavity 14 Although it is expressly stated that the fiber composite mat 16 essentially over the entire component section 14a the mold cavity extends from which the molded component 18 evident.

The mold cavity 14 moreover has a mold core support section 14b on, which for receiving a longitudinal end of a mold core described below 20 serves.

Finally, the mold cavity indicates 14 a flange receiving portion 14c on, which for receiving a passport section 22a a flange 22 suitable, the fixed with the mold core 20 connected is.

Preferably, the fitting portion serves 22a the centering of the flange 22 relative to the mold cavity 14 ,

The mold cavity 14 extends along a mold cavity longitudinal track F, which in the in the 1 and 2 shown substantially flat and S-shaped in the plane.

In the component section 14a the mold cavity 14 can, in the example of 1 and 2 approximately in the longitudinal center of the component section 14a , a lead 24 be formed, which on the outer contour of the finished component 18 a constriction 26 generated (see 3 and 4 ), on the example, a holder or the like on the molded component 18 can be attached.

The component section 14a more specifically, includes a radially inner tube forming area 14a1 with a substantially circular cylindrical cross-section, which, however, by the plane of the drawing 1 parallel parting plane between upper mold and lower mold 12 is divided into two substantially semi-cylindrical recesses.

Further includes in the 1 and 2 illustrated component section 14a at the mold parting plane radially outside of the pipe forming section 14a1 each a Flanschformabschnitt 14a2 and 14a3 ,

The circle K shows a partial section in a sectional plane, which to the plane of the 1 is parallel and immediately before the also to the plane of the 1 parallel cavity wall section 23 the Flanschformabschnitts 14a3 is located.

In the forming process exemplified here, each of the molded parts is: upper mold and lower mold 12 , one fiber composite mat each 16 assigned, which during the forming process with each other through the Flanschformabschnitte 14a2 and 14a3 to one connection flange each 28 and 30 get connected.

Thus, the formation of a tubular member 18 made of two fiber composite mats in a single molding step possible.

The pipe molding section 14a1 of the component section 14a the mold cavity 14 forms the between the connecting flanges 28 and 30 located tubular body 32 on the finished component 18 out (see 3 and 4 ).

To form the geometry of the inner wall 34 of the tubular body 32 gets into the mold cavity between the two fiber composite mats 16 a mold core 20 inserted, which in the unloaded state substantially formlabile shell 36 includes.

The formlabile shell 36 is in the in 1 Example shown made of silicone rubber or thermoplastic polyester elastomer (TPE-E). It is at her one, as opening longitudinal end 38 designated longitudinal end with the flange preferably made of stainless steel 22 connected. At its opposite longitudinal end 40 is the shell, as in the rest of the course between the two longitudinal ends 38 and 40 , substantially fluid-tight.

In the shell 36 is a volume 42 formed into which a in a Füllfluidvorratsbehälter 44 provided filling fluid 46 by means of a pump 48 , preferably via a shut-off valve 50 through a fluid opening 51 the shell 36 can be introduced through.

The introduction takes place via a filling fluid line 52 at which the shut-off valve 50 and the pump 48 are provided and which in the filling fluid 46 the Füllfluidvorratsbehälter 44 dips.

The filling fluid line 52 is preferably with a counterflange 54 provided, which with the flange 22 of the mold core 20 , in particular the shell 36 , is releasably coupled fluid-transmitting.

Through the shut-off valve 50 can once in the case 36 of the mold core 20 provisioned Fill fluid pressure can be maintained without the need for the pump 48 Energy would have to be supplied.

The elastomeric shell 36 of the mold core 20 can via the same filling fluid line 52 optionally with the aid of the pump 48 and in particular taking advantage of material elastic restoring forces of the shell 36 be at least partially emptied. In other words: the pump 48 and the fluid line 52 can fill fluid in both directions between Füllfluidvorratsbehälter 44 and sheath 36 to promote.

In the in 1 shown initial state lies the envelope 36 of the mold core 20 essentially relaxed, ie without internal tensile or expansion stresses.

The compression molding device 10 can continue a cooling device 56 have, with which the filling fluid 46 , preferably in Füllfluidvorratsbehälter 44 , is coolable, leaving it with a reduced temperature in the shell 36 can be promoted. This can be the cooling of the thermoplastic binder material in the fiber composite mat 16 facilitate removal temperature.

Another, not shown, cooling device is preferably in the mold, so in the lower mold 12 and in the upper mold, provided to that in the mold cavity 14 preferably inlaid raw material below the melting temperature of the thermoplastic binder material preferably contained therein.

For the preferred automated or at least partially automated operation of the molding device 10 This can be a control device 58 include, which preferably the pump 48 , the shut-off valve 50 and the cooling device 56 controls.

Then, if the pump 48 in 1 starts, filling fluid 46 in the interior volume 42 the shell 36 To promote, is the internal volume 42 against the material elasticity of the shell 36 increased. The pressure in the case 36 and the amount of fill fluid 46 in it are increased until the shell 36 of the mold core 20 under pressure essentially the entire internal volume 60 of the component to be molded 18 (please refer 3 and 4 ) occupies.

This condition is in 2 shown.

For the sake of clarity, in 2 the filling fluid reservoir 44 , the fill fluid supply 46 , the pump 48 , the shut-off valve 50 , the cooling device 56 and the control device 58 not shown. These are still present.

The pressurized shell 36 presses in the pipe molding section 14a1 the fiber composite mats 16 radially outward to the Kavitätswandung the pipe forming section 14a1 , Thus, the mold core carries 20 and in particular the shell 36 to that for the forming of fiber composite mats 16 to the component 18 required exercise of force. The from the flange 22 remote longitudinal end 40 is through the hemispherical flange receiving portion 14b the mold cavity 14 supported, what the life of the mold core 20 and in particular the shell 36 considerably increased.

As in the circular section cut in the 1 and 2 is recognizable, is the material of the shell 36 due to the material expansion in 2 significantly thinner than in 1 ,

Due to the volume increase of the shell 36 can the fiber composite mats 16 in the area of the projection 24 be placed close to the wall of the mold cavity. The constriction 26 (please refer 3 and 4 ) can not only be shaped well, but the mold core 20 who is the one to form this constriction 26 in the tube body 32 can at least be supported, due to its optional fillability and at least partial emptying with filling fluid despite the by the projection 24 caused undercut from the finished component 18 demoulded and reused.

As in the 1 and 2 is recognizable, the shell extends 36 along a longitudinal hull H, which in the in the 1 and 2 represented example coincides with the Formkavitätslängsbahn F.

The inner diameter of the projection 24 defines a smallest inner diameter d of the mold cavity 14 ,

The in the relaxed ground state of 1 between the projection 24 and the flange far longitudinal end 40 located section of the shell 36 represents a push-through section 62 which is at a demolding of the mold core 20 from the finished component 18 along the Formkavitätslängsbahn F or Hüllenlängsbahn H the smallest diameter d of the mold cavity 14 must happen.

The case 36 points in the in 1 illustrated relaxed ground state at least in Durchsteckabschnitt 62 a largest diameter D, which, however, is smaller than the smallest inner diameter d of the mold cavity 14 , Preferably, the largest diameter D of the through-insertion portion 62 the shell 36 at least twice the wall thickness w of the finished molded component 18 smaller than the smallest inner diameter d of the mold cavity 14 , Then there is a simple demolding of the shell 36 of the mold core 20 from the finished component 18 along the envelope longitudinal path H readily possible.

With the in the 1 and 2 roughly schematically illustrated molding device 10 thus undercuts can be generated in Formkavitätslängsbahnrichtung by a reusable mandrel.

By using upper and lower molds, each half shell of the later component can 18 be formed in almost any shape.

A tubular component 18 like that in the 3 and 4 shown, can be made of two fiber composite mats 16 be prepared as starting materials in a single shaping step, in which each fiber composite mat to a half shell of the component 18 formed while the two half-shells are connected together.

Claims (16)

Mold core ( 20 ) for use in pressing processes, in particular for the compression molding of fiber composites, preferably fiber webs, such as fiber webs, which in the initial state, ie prior to shaping, at least one reinforcing fiber material and at least one binder material, preferably thermoplastic binder fiber material, characterized in that Mold core ( 20 ) a case ( 36 ) which is filled with a filling fluid ( 46 ) and from which the filling fluid ( 46 ) is at least partially emptied. Mold core ( 20 ) according to claim 1, characterized in that the envelope ( 36 ) comprises an elastic material, preferably a material with elastomeric deformation properties, particularly preferably formed from such a material. Mold core ( 20 ) according to claim 1 or 2, characterized in that the envelope ( 36 ) comprises a substantially dimensionally unstable shell component in the unloaded state. Mold core according to one of the preceding claims, characterized in that the casing ( 36 ) comprises a silicone elastomer, in particular silicone rubber, or / and a thermoplastic polyester elastomer. Mold core ( 20 ) according to one of the preceding claims, characterized in that the envelope ( 36 ) is an elongated filling fluid-tight component, which preferably along a longitudinal jacket web (H), in particular longitudinal axis envelope extends. Mold core ( 20 ) according to claim 5, characterized in that the envelope ( 36 ) at an opening longitudinal end region ( 38 ) a fluid port ( 51 ) for introducing and / or discharging filling fluid ( 46 ) having. Mold core ( 20 ) according to claim 5 or 6, characterized in that the envelope ( 36 ) at a longitudinal end region ( 40 ), preferably at the opening longitudinal end region (FIG. 38 ) opposite longitudinal end region, fluid-tight sealable or preferably formed fluid-tight. Mold core ( 20 ) according to one of the preceding claims, characterized in that the envelope ( 36 ), preferably at its opening longitudinal end region ( 38 ), for, preferably detachable, coupling with a filling fluid line ( 52 ) is formed, in particular a flange ( 22 ), preferably from one compared to the shell ( 36 ) substantially rigid material, such as metal. Mold core ( 20 ) according to one of the preceding claims, characterized in that the envelope ( 36 ), preferably by means of the filling fluid line ( 52 ), for, preferably detachable, coupling with a filling fluid pressure source ( 48 ) and / or with a filling fluid supply ( 46 ) is trained. Compression molding device ( 10 ), in particular for the compression molding of fiber composite materials ( 16 ), with a, in particular multi-part, mold ( 12 ), which is a mold cavity ( 14 ), and with a mold core ( 20 ) according to any one of the preceding claims. Compression molding device ( 10 ) according to claim 11, characterized in that the mold cavity ( 14 ) has along its extent a smallest inner diameter (d) and the mandrel ( 20 ) is deformable as intended between a substantially unfilled or minimally filled or / and substantially unpressurized or minimal pressure-prone and / or substantially relaxed or minimal voltage-prone basic shape whose outer diameter (D) at least in a push-through section ( 62 ) of the mandrel ( 20 ), which in the mold cavity ( 14 ) inserted mold core ( 20 ) from the location of the smallest inner diameter (d) of the mold cavity ( 14 ) to a longitudinal end ( 40 ) of the mandrel ( 20 ), preferably the opening longitudinal end region ( 38 ) opposite longitudinal end ( 40 ), does not exceed the smallest inner diameter (d). Compression molding device ( 10 ) according to claim 12, characterized in that the largest outer diameter (D) of the mandrel ( 20 ) in its basic form substantially over its entire under normal operation of the Mold cavity ( 14 ) surrounded length the smallest inner diameter (d) of the mold cavity ( 14 ) does not exceed. Compression molding, in particular for the compression molding of fiber composite materials ( 16 ), using a mold core ( 20 ) according to one of claims 1 to 9, preferably further using a compression molding apparatus ( 10 ) according to one of claims 10 to 12, comprising the following steps: - insertion of raw material intended for shaping ( 16 ), in particular fiber composite raw material, into a mold cavity ( 14 ) or in a part thereof of a molding tool ( 12 ), - inserting the mold core ( 20 ) in the mold cavity ( 14 ) or in a part thereof, - closing the mold cavity ( 14 ) having a mold ( 12 ), - exerting pressure on the raw material ( 16 ), in particular with additional cooling, - opening the mold ( 12 ) and - removal of the molded component ( 18 ), characterized in that the step of applying pressure to the raw material ( 16 ) a step of introducing fill fluid ( 46 ) in the mold core ( 20 ) and / or increasing the pressure of filling fluid ( 46 ) in the mold core ( 20 ). The molding method according to claim 13, characterized in that the step of loading raw material ( 16 ) in a mold cavity ( 14 ) a partial step of inserting a first layer of raw material into a lower mold cavity ( 14 ) or in a part thereof of a molding tool ( 12 ) and a further sub-step of inserting a second layer of raw material on the first layer of raw material, wherein between these partial steps, the insertion of the mandrel ( 20 ) in the mold cavity ( 14 ) takes place on the first layer of raw material, so that the mandrel ( 20 ) is located after the second partial step between the two layers of raw material. A molding method according to claim 13 or 14, characterized in that it comprises a step of discharging filling fluid ( 46 ) from the mold core ( 20 ) and / or a lowering of the pressure of filling fluid ( 46 ) in the mold core ( 20 ). Compression molding method according to one of claims 13 to 15, characterized in that it comprises a step of extracting the mandrel ( 20 ) from the molded component ( 18 ).

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