DE102018207937A1 - Method for producing a sandwich component - Google Patents

Abstract

In order to provide a method for producing a sandwich component, which method should be process reliable feasible, it is proposed that the method comprises introducing two cover layers in a forming tool and / or fixing them in the forming tool such that the two cover layers at least partially spaced from each other are arranged; Producing a core arranged between the two cover layers and fixing both cover layers in a final shape and / or in an end position by injecting a plastic material between the two cover layers.

Description

The invention relates to a method for producing a sandwich component.

A method for producing a sandwich component is, for example, from DE 10 2014 017 200 A1 known.

The present invention has for its object to provide a method for producing a sandwich component, the method should be process reliable feasible.

This object is achieved by a method for producing a sandwich component having the features of claim 1.

• Einbringen von zwei Decklagen in ein Formgebungswerkzeug und/oder Fixieren derselben in dem Formgebungswerkzeug derart, dass die zwei Decklagen zumindest bereichsweise beabstandet voneinander angeordnet sind; Herstellen eines zwischen den zwei Decklagen angeordneten Kerns und Fixieren der zwei Decklagen in einer Endform und/oder in einer Endposition durch Einspritzen eines Kunststoffmaterials zwischen die zwei Decklagen.

The method preferably includes the following:

• Inserting two cover layers into a shaping tool and / or fixing them in the forming tool in such a way that the two cover layers are arranged at least partially spaced from one another; Producing a core arranged between the two cover layers and fixing the two cover layers in a final shape and / or in an end position by injecting a plastic material between the two cover layers.

The shaping tool is in particular an injection molding tool of an injection molding device.

It may be favorable if the shaping tool is a dipping edge tool. Dipping edge tools preferably comprise a plurality of dipping edges, which are arranged running in particular in Entformungsrichtung the dipping edge tool. It may be beneficial in this case if the mold halves of a dipping edge tool have dipping edges which correspond to one another and which preferably overlap already in the case of an at least partially closed dipping edge tool such that plastic material can not escape from the dipping edge tool between the dipping edges. Dipping edge tools are therefore preferably suitable for injection compression processes in which the mold halves are moved during and / or after the introduction of a plastic material into the dipping edge tool.

Preferably, the molding tool is closed when injecting the plastic material between the two cover layers, in particular completely closed. Mold halves of the forming tool are in particular collapsed.

In particular, the method for producing a sandwich component does not include a vacuum infusion method.

After the injection of the plastic material between the two cover layers, the sandwich component is preferably cooled. Subsequently, the mold halves of the forming tool are in particular moved apart and the sandwich component is removed from the forming tool, in particular ejected from the forming tool.

Preferably, the method can provide a sandwich component, in particular a sandwich component with a core made of a plastic material, which can be processed and / or produced in three-dimensional shaping, in particular in only one method step, in particular by forming one or both cover layers.

After the introduction of the two cover layers into the forming tool, the two cover layers are arranged in particular spaced apart from one another in such a way that the two cover layers at least partially, in particular completely, delimit a core region in which the core is produced.

The plastic material is preferably injected as a melt into the forming tool, in particular between the two cover layers.

Preferably, the cover layers cover the core of the finished sandwich component, in particular in a main direction of extent and / or in a thickness direction of the sandwich component, at least partially, in particular completely, or only partially.

It may be favorable if the two cover layers are introduced by means of a transport device into the forming tool.

Preferably, the transport device comprises one or more holding elements, by means of which one or both cover layers can be fastened to the transport device. The holding elements may be formed, for example, as a needle gripper and / or vacuum suction.

A needle gripper preferably comprises a plurality of needles, in particular a plurality of pairs of needles, by means of which the cover layers for fastening the same are pierced.

The transport device in particular comprises a robot arm of an industrial robot.

In one embodiment of the method, it is provided that one or both of the two cover layers are heated prior to the introduction of the two cover layers into the shaping tool.

The two cover layers preferably comprise a cover layer material or are formed from a cover layer material.

The cover layer material comprises in particular a matrix material, in which in particular reinforcing fibers are embedded.

The matrix material comprises in particular a thermoplastic material.

The cover layers are heated in particular to a melting temperature of the matrix material or to a temperature immediately below the melting temperature of the matrix material.

For the purposes of this description and the appended claims, a temperature immediately below the melting temperature of the matrix material is understood in particular to be a temperature which is at most 15 K less than the melting temperature of the matrix material, in particular at most 10 K smaller than the melting temperature of the matrix material, preferably at most 5 K. smaller than the melting temperature of the matrix material.

It may be favorable if the two cover layers are heated by means of a heating device, in particular by means of an infrared heating device.

The two cover layers are heated in particular outside of the forming tool.

In one embodiment of the method, it is provided that the two cover layers comprise a fiber-reinforced thermoplastic material, in particular a continuous fiber-reinforced thermoplastic material, or consist of a fiber-reinforced thermoplastic material, in particular of a continuous fiber-reinforced thermoplastic material.

Preferably, one or both of the two cover layers is an organic sheet and / or a thermoplastic nonwoven.

In the context of this description and the appended claims, a thermoplastic nonwoven is understood in particular to mean a nonwoven comprising fibers which are embedded in a thermoplastic matrix material.

The nonwoven fabric comprises in particular carbon fibers and / or glass fibers.

Alternatively or additionally, the cover layers comprise a metallic material, a textile material and / or a foil material.

In one embodiment of the method, it is provided that the two cover layers are fastened, in particular fixed, in one or more mold halves of the forming tool, before the forming tool is closed.

In particular, the two cover layers are fastened in one or more mold halves of the shaping tool prior to closing the shaping tool.

It may be favorable if the two cover layers are fastened by means of one or more fastening elements in one or more mold halves of the forming tool.

Preferably, one or more fastening elements are arranged on each mold half of the forming tool, in particular fixed relative to the respective mold half of the forming tool.

Preferably, the two cover layers are secured in the same mold half of the forming tool.

Preferably, the two cover layers are held at least partially spaced apart from one another by means of one or more spacer elements.

Alternatively or additionally, the two cover layers are fastened in mutually different mold halves of the forming tool.

The fastening elements are formed for example as vacuum suction. The cover layers are sucked in particular due to a vacuum applied to the vacuum suction and attached by means of vacuum suction in one or more mold halves of the forming tool.

Alternatively or additionally, the fastening elements are designed as cylindrical, in particular circular cylindrical, needle elements.

It may be favorable if the needle elements comprise a tip and are tapered in the region of the tip.

Preferably, the fastening elements, in particular the needle elements, project away from a wall of a mold half of the forming tool.

It may be favorable if the fastening elements, in particular the needle elements, extend into a cavity of the shaping tool when the forming tool is closed.

The needle elements are in particular fixed relative to the respective mold half of the forming tool.

When one or both of the two cover layers are hung on the needle elements or slid onto the needle elements, one or both of the two cover layers may be fastened to secure one or both of the two cover layers in a mold half of the forming tool, for example with passage openings formed in them one or both of the two cover layers are inserted, are pushed onto the needle elements. Alternatively or additionally, it is possible that one or both of the two cover layers are pushed onto the needle elements and the needle elements pierce one or both of the two cover layers.

In one embodiment of the method, it is provided that a thermoplastic material is injected between the two cover layers.

Alternatively or additionally, a thermosetting plastic material, a compact injection molding material, in particular a thermoplastic material without particle loading, a physically foamed or foamable material and / or a particle foam material is injected between the two cover layers.

In one embodiment of the method, it is provided that the two cover layers are held spaced apart from one another by means of one or more spacer elements at least in regions. It may be favorable if the spacer elements are arranged such that the two cover layers are spaced apart, in particular in the region of an injection opening.

The two cover layers are preferably spaced apart in the direction of injection.

In the context of this description and the appended claims, an injection direction is understood to mean in particular a direction running transversely, preferably perpendicular, to a main extension plane of the cover layers.

In one embodiment of the method, it is provided that one or more spacer elements are arranged between the two cover layers, in particular on a core side of the two cover layers.

Preferably, the spacer elements arranged between the two cover layers, in particular on the core side of the two cover layers, remain in the finished sandwich component.

It may be favorable if spacer elements are respectively arranged on one core side of both cover layers.

Alternatively or additionally, spacer elements are arranged only on one core side of a cover layer.

Preferably, one or more, in particular all, between the two cover layers, in particular on the core side of the two cover layers, arranged spacer elements made of a particle foam material.

In the context of this description and the appended claims, a core side of the cover layers is understood to mean, in particular, a side of the cover layers facing away from the respective mold half of the forming tool and / or a side of the cover layers facing the core.

It may also be favorable if the spacer elements arranged between the two cover layers are made of a compact injection molding material, in particular of a thermoplastic plastic material without particle loading.

Alternatively or additionally, it is conceivable that one or more, in particular all, between the two cover layers, in particular on the core side of the two cover layers, arranged spacer elements made of a metallic material, in particular of a sheet metal material.

Preferably, the spacer elements arranged between the two cover layers are sheet metal stamped elements.

It may be favorable if the spacer elements and / or the two cover layers and / or the core are made of an identical material.

In particular, the cover layers comprise a matrix material, wherein the matrix material of the cover layers and / or the plastic material which is injected between the two cover layers and / or the spacer elements are made of an identical material.

It may also be favorable if the spacer elements and / or the two cover layers and / or the core are produced from a comparable material.

In particular, the cover layers comprise a matrix material, wherein the matrix material of the cover layers and / or the plastic material which is injected between the two cover layers, and / or the spacer elements are made of a comparable material.

For the purposes of this description and the appended claims, comparable materials are understood as meaning, in particular, plastic materials produced from identical monomers, in particular polymers.

Preferably, therefore, a cohesive connection of the two cover layers with the core and the one or more spacer elements can be provided.

In one embodiment of the method it is provided that in each case a cover layer by means of one or more spacer elements, which are fixed to a first mold half of the forming tool, by closing the forming tool against a second mold half of the forming tool, in particular against a wall of the second mold half pressed.

Preferably, the respective cover layer is thereby at least partially reshaped.

Preferably, the two cover layers are held by means of arranged on the mold halves of the forming tool spacer elements by closing the forming tool in particular at least partially spaced from each other.

It may be favorable if the spacer elements fixed to the mold halves of the shaping tool are designed as fastening elements for fastening the cover layers in the mold halves of the forming tool.

The spacer elements fixed to the mold halves of the forming tool are preferably designed as cylindrical, in particular circular cylindrical, bolt elements or needle elements. Spacer elements designed as bolt elements preferably have a flat and / or blunt abutment surface at a free end thereof, whereas spacer elements formed as needle elements preferably have a tip at their free end.

In one embodiment of the method it is provided that in each case a cover layer is introduced into a respective mold half of the forming tool.

In particular, in each case a cover layer is fastened in each case in a mold half of the forming tool.

In one embodiment of the method it is provided that one or more passage openings are introduced into at least one of the two cover layers prior to the injection of the plastic material between the two cover layers, wherein at least one of the two cover layers is fastened by means of one or more passage openings in a mold half of the forming tool, is suspended in particular in arranged on the mold half fasteners.

It may be favorable if one or more passage openings are introduced into at least one of the two cover layers before the introduction of the cover layers into the shaping tool.

Preferably, at least one of the two cover layers is pushed onto one or more fastening elements, in particular needle elements, by means of one or more passage openings.

In one embodiment of the method it is provided that one or more passage openings are introduced into at least one of the two cover layers prior to the injection of the plastic material between the two cover layers, wherein an injection nozzle for injecting the plastic material between the two cover layers at least partially into the one or more Passage openings protrudes or into which one or more passage openings is directed.

Preferably, an injection channel of the forming tool opens into the one or more passage openings.

The plastic material is preferably injected through one or more passage openings, in particular injection openings, between the two cover layers.

Preferably, the two cover layers are kept spaced apart from one another between the two cover layers in the region of the one or more passage openings prior to the injection of the plastic material, in particular by means of one or more spacer elements.

In one embodiment of the method, it is provided that a plastic material, which a Propellant comprises, is injected between the two cover layers and is then at least partially foamed.

It may be favorable if the shaping tool is at least partially opened between the two cover layers in an expansion stroke after the injection of the plastic material comprising a blowing agent. In particular, the mold halves of the forming tool are at least partially moved apart during the expansion stroke.

Preferably, through foamed plastic material, passage openings in one or both cover layers can be closed at least partially, preferably completely.

In one embodiment of the method, it is provided that one or both of the two cover layers are applied in particular conforming to a wall of a mold half of the forming tool.

When fitting in particular to a wall of a mold half of the forming tool, the cover layers are preferably deformed into the final shape and / or end position.

Preferably, one or both of the two cover layers are formed by molding into a contour of a wall of a respective mold half of the forming tool.

It may be favorable if one or both of the two cover layers are reshaped by the pressure of the plastic material injected in particular as a melt between the two cover layers.

In particular, one or both of the two cover layers are reshaped so that they are applied by the plastic material injected between the two cover layers to conform to a wall of the mold halves of the forming tool.

In one embodiment of the method, it is provided that one or both of the two cover layers are at least partially reshaped when the two cover layers are introduced into the forming tool.

It may be favorable if one or both of the two cover layers are applied in a conforming manner to a wall of the forming tool by means of a transport device when the two cover layers are introduced into the forming tool.

Alternatively or additionally, one or both of the two cover layers are applied in a conforming manner to a wall of the cavity of the forming tool when the two cover layers are introduced into the forming tool by means of slide elements arranged on the shaping tool.

In one embodiment of the method, it is provided that a distance of the two cover layers from each other during the injection of the plastic material or after the injection of the plastic material between the two cover layers is constant or increased.

It is conceivable, for example, that a distance of the two cover layers is increased by injecting the plastic material between the two cover layers, in particular due to the pressure of the plastic material during the injection of the same between the two cover layers.

Alternatively or additionally, it is possible that the mold halves of the forming tool during the injection of the plastic material and / or after the injection of the plastic material are at least partially moved apart.

A distance between the two cover layers is not reduced in particular during the injection of the plastic material between the two cover layers.

Further features and / or advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

• 1 bis 7 schematische Darstellungen von Verfahrensschritten eines ersten Ausführungsbeispiels eines Verfahrens zum Herstellen eines Sandwichbauteils;
• 8 bis 13 schematische Darstellungen von Verfahrensschritten eines zweiten Ausführungsbeispiels eines Verfahrens zum Herstellen eines Sandwichbauteils;
• 14 eine schematische Darstellung einer in eine Heizeinrichtung eingebrachten Decklage;
• 15 eine schematische Darstellung eines an einer Decklage angeordneten Abstandshalterelements in einer ersten Konfiguration;
• 16 eine schematische Darstellung eines an einer Decklage angeordneten Abstandshalterelements in einer zweiten Konfiguration; und
• 17 eine schematische Darstellung eines an einer Decklage angeordneten Abstandshalterelements in einer dritten Konfiguration.

In the figures show:

• 1 to 7 schematic representations of method steps of a first embodiment of a method for producing a sandwich component;
• 8th to 13 schematic representations of method steps of a second embodiment of a method for producing a sandwich component;
• 14 a schematic representation of an inserted into a heater cover layer;
• 15 a schematic representation of a arranged on a cover layer spacer element in a first configuration;
• 16 a schematic representation of a arranged on a cover layer spacer element in a second configuration; and
• 17 a schematic representation of a arranged on a cover layer spacer element in a third configuration.

Identical or functionally equivalent elements are provided with the same reference numerals in all figures.

1 to 7 show a first embodiment of an injection molding apparatus 100 as a whole for carrying out a method for producing a sandwich component.

The injection molding device 100 preferably comprises a forming tool 102 , in particular an injection molding tool 104 , It may be favorable if the forming tool 102 is a dipping edge tool.

The forming tool 102 includes in particular two mold halves 106 ,

The mold halves 106 each preferably have a wall 108 with a contour 110 on.

In the closed state of the forming tool 102 limit the mold halves 106 , especially the wall 108 the mold halves 106 , preferably a cavity 112 (Comp. 4 ).

The injection molding device 100 preferably further comprises a conveyor 114 for conveying a plastic material 116 in the forming tool 102 , especially in the cavity 112 of the forming tool 102 ,

The conveyor 114 includes in particular a screw conveyor 118 ,

For conveying the plastic material 116 in the cavity 112 of the forming tool 102 includes at least one of the mold halves 106 one or more injection channels 120 ,

The conveyor 114 further preferably comprises an injection nozzle 122 , by means of which the plastic material 116 through the injection channel 120 in the cavity 112 of the mold 102 is injectable.

The forming tool 102 preferably comprises one or more fasteners 124 ,

In the present case are on both mold halves 106 two fasteners each 124 intended.

The fasteners 124 are in particular relative to the respective mold half 106 of the forming tool 102 established.

The fasteners 124 are preferably as cylindrical, in particular circular cylindrical, needle elements 126 educated.

The fasteners 124 , in particular the needle elements 126 , preferably project from the wall 108 the mold halves 106 away and extend with closed forming tool 102 especially in the cavity 112 into it.

Alternatively or additionally, it is conceivable that the fastening elements 124 are designed as vacuum suction.

The injection molding device 100 preferably further comprises a transport device 128 ,

The transport device 128 includes in particular a robot arm 130 an industrial robot 132 ,

Preferably, the transport device comprises 128 Furthermore, one or more, for example, designed as a needle gripper holding elements 134 , Alternatively or additionally, the holding elements can also be designed as vacuum suction elements.

The injection molding device 100 preferably further comprises an in 14 shown heater 136 , in particular an infrared heater 138 ,

That in the 1 to 7 schematically illustrated first embodiment of the method for producing a sandwich component 140 (Comp. 7 ) works in particular as follows:

As in 1 can be clearly seen, are by means of the transport device 128 two cover layers 142 in the forming tool 102 brought in.

The cover layers 142 are in particular by means of the holding elements 134 the transport device 128 temporarily at the transport device 128 attached, for example by needles of a trained as a needle gripper holding element 134 through the cover layers 142 be pushed through or at least partially in the cover layers 142 penetration.

The cover layers 142 in particular comprise a cover layer material 144 or are of a liner material 144 educated.

The cover layer material 144 preferably comprises a matrix material, in which in particular reinforcing fibers are embedded. In particular, the matrix material comprises a thermoplastic material.

Before introducing the cover layers 142 in the forming tool 102 by means of the transport device 128 become the top layers 142 by means of the transport device 128 the in 14 shown heater 136 fed.

The cover layers 142 are preferably heated.

The cover layers 142 in particular to a melting temperature of the matrix material of the cover layer material 144 or at a temperature immediately below the melting temperature of the matrix material of the liner material 144 heated.

In at least one of the two cover layers 142 is preferably prior to injection of the plastic material 116 in the forming tool 102 , in particular before the introduction of the cover layers 142 in the forming tool 102 , one or more passages 146 brought in.

The one or more passage openings 146 penetrate the respective cover layer 142 in particular completely, preferably transversely, in particular perpendicular to a main extension direction of the cover layers 142 ,

As in 1 is clearly visible, are at the transport device 128 by means of the retaining elements 134 a total of two cover layers 142 attached, for example by needles of trained as a needle gripper holding elements 134 through the two cover layers 142 are pushed through or at least partially in the cover layers 142 penetration.

The two cover layers 142 are thus preferably simultaneously in the open forming tool 102 inside moves.

As in 2 can be clearly seen, becomes one of the two cover layers 142 by means of movable vacuum suction elements 148 in the direction of the arrow 149 moved while conforming to a wall 108 created.

Preferably, a contour of the cover layer fits 142 to a contour 110 the wall 108 the mold half 106 of the mold 102 on.

The cover layers 142 preferably have a plurality of passage openings 146 on, for reasons of clarity in the 1 to 7 but not all passages 146 are shown.

On a core page 151 the top layers 142 are preferably a plurality of spacer elements 150 arranged.

In the in the 1 to 7 shown embodiment of the method for producing a sandwich component 140 are the spacer elements 150 preferably as sheet metal stamping elements 152 educated.

Such a spacer element 150 is for example in the 15 to 17 shown.

The as a sheet metal stamping element 152 trained spacer element 150 is preferably at a passage opening 146 a cover layer 142 arranged.

The sheet metal stamping element 152 preferably comprises a ring section 154 , which the passage opening 146 surrounds annularly.

The spacer element 150 , in particular the sheet metal stamping element 152 , preferably comprises a plurality of arm sections 156 which of the ring section 154 in particular protrude radially away.

As in 15 can be clearly seen, extend the arm portions 156 in particular at least approximately parallel to the cover layer 142 ,

The arm sections 156 However, they can also be used to set a distance between two cover layers 142 be used to each other.

For this purpose, the arm sections 156 in the direction of the 16 and 17 shown arrows 158 be transformed.

At the in 16 shown spacer element 150 are the arm sections 156 in the direction of the passage opening 146 bent and at least partially into the passage opening 142 directed into it.

At the in 17 shown spacer element 150 are the arm sections 156 only comparatively light in the direction of the arrows 158 bent so that the arm sections 156 not in the passage opening 146 are directed towards.

Coming back to 2 It can be clearly seen that the shape conforms to the wall 108 the mold half 106 of the forming tool 102 applied cover layer 142 by means of the spacer elements 150 on the fasteners 124 , in particular the needle elements 126 , postponed.

The needle elements 126 are in particular in the passages 146 to which the spacer elements 150 are arranged, inserted. Alternatively or additionally, it is possible that the cover layers 142 on top of the needle members 126 be plugged so that the needle elements 126 the cover layers 142 pierced and in particular to a previous introduction of the passage openings 146 can be waived.

How clearly in 3 can be seen, is now the second cover layer 142 by means of the transport device 128 in a mold half 106 of the forming tool 102 attached.

These are the at the top layer 142 arranged spacer elements 150 which in the 15 to 17 are shown, also on the fasteners 124 , in particular the needle elements 126 , postponed.

The second cover layer 142 is doing in a mold half 106 attached.

The second cover layer 142 is particularly so in the mold half 106 attached that in 3 shown passage opening 146 coaxial with the injection channel 120 is arranged.

After both top layers 142 each in a mold half 106 of the forming tool 102 are fastened, in particular in the fasteners 124 are hooked, the forming tool 102 closed by the mold halves 106 in particular, be completely merged.

The two mold halves 106 now limit the cavity 112 ,

As in 4 can be clearly seen, at least press on the in 4 Form half shown on the left 106 arranged fasteners 124 in the 4 right-side cover layer 142 against the wall 108 the in 4 right half of the mold 106 so that the in 4 right-side cover layer 142 additionally in the in 4 right half of the mold 106 of the forming tool 102 is attached.

Subsequently, by means of the conveying device 114 the injection molding device 100 the injector 122 arranged such that these in the injection channel 120 protrudes into or into the injection channel 120 directed into it.

Alternatively or additionally, it is conceivable that the injection nozzle 122 directly into a passage opening 146 a cover layer 142 protrudes into or is directed into.

As in 5 is clearly visible, is by means of the conveyor 114 , in particular by means of the screw conveyor 118 , Plastic material 116 , in particular thermoplastic material 117 , between the two cover layers 142 especially in a core area 160 ,

When injecting the plastic material 116 by means of the conveyor 114 becomes the plastic material 116 in particular in an injection direction 162 between the two cover layers 142 injected.

The plastic material 116 in particular forms a core between the two cover layers 164 ,

Once the cavity 112 of the forming tool 102 completely with the plastic material 116 is filled, preferably no plastic material 116 more by means of the conveyor 114 in the forming tool 102 , in particular between the two cover layers 142 , injected (cf. 6 ).

The two cover layers 142 be by injecting the plastic material 116 between the two cover layers 142 preferably in a final shape and / or an end position of the two cover layers 142 fixed.

After injecting the plastic material 116 between the two cover layers 142 becomes the sandwich component 140 preferably cooled.

Subsequently, the two mold halves 106 of the forming tool 102 preferably completely ripped apart and the sandwich component 140 in particular from the forming tool 102 removed, in particular ejected from the same (see. 7 ).

After ejecting the sandwich component 140 from the forming tool 102 in particular will be a sprue 166 from the sandwich component 140 away.

In the finished sandwich component 140 cover the top layers 142 the core 164 in a main direction of extension 168 and / or in a thickness direction of the sandwich component 140 preferably at least partially, in particular at least approximately completely.

During the injection of the plastic material 116 between the two cover layers 142 is a distance 170 the two cover layers 142 preferably constant or increased. The distance 170 is a distance between the cover layers 142 after closing the forming tool 102 and / or after completing the sandwich component 140 , For example, it is conceivable that a distance 170 the two cover layers 142 due to the pressure of the plastic material 116 when injecting it between the two cover layers 142 is enlarged.

One in the 8th to 13 illustrated second embodiment of the injection molding apparatus 100 for carrying out a method for producing a sandwich component 140 is different from the one in the 1 to 7 illustrated first embodiment of the injection molding apparatus 100 essentially by the fact that at the in the 8th to 13 shown on the left half of the mold 106 of the forming tool 102 no fasteners 124 , in particular no needle elements 126 , are provided.

In addition, it is conceivable that at the transport device 128 only one-sided holding elements 134 are arranged.

• Zunächst werden zwei Decklagen 142 mittels der Transporteinrichtung 128 der in 14 dargestellten Heizeinrichtung 136 zugeführt und dort erwärmt.

That in the 8th to 13 illustrated embodiment of a method for producing a sandwich component 140 works in particular as follows:

• First, two cover layers 142 by means of the transport device 128 the in 14 shown heater 136 fed and heated there.

Preferably, in at least one of the two cover layers 142 also one or more passage openings 146 brought in.

The two cover layers 142 are preferably outside of the forming tool 102 by means of several spacer elements 150 spaced apart, which are on a core side 151 the top layers 142 are arranged.

In principle, it is conceivable that the spacer elements in accordance with the in the 15 to 17 shown spacer elements 150 , in particular as sheet-metal stamping elements 152 , are formed, wherein the arm portions 156 at least partially in the direction of the arrows 158 are bent so that the two cover layers 142 by means of the arm sections 156 at least partially spaced from each other can be arranged.

Preferably, the two cover layers 142 however by means of spacer elements 150 spaced from each other, which are made of a particle foam material and / or made of a compact injection molding material.

In particular, the two cover layers 142 by means of plate-shaped spacer elements 150 which preferably have two at least approximately parallel bearing surfaces which are in contact with a respective cover layer 142 can be brought, spaced from each other.

It is conceivable that the spacer elements 150 at least partially positively with a matrix material of the cover layer material 144 the two cover layers 142 be connected in particular cohesively.

The two spaced apart cover layers 142 are preferably by means of the holding elements 134 the transport device 128 at the transport device 128 attached and in the forming tool 102 moved into it.

As in 9 can be clearly seen, the cover layers 142 then preferably in the in 9 right half of the mold 106 attached. It is conceivable that the cover layers 142 on the fasteners 124 , in particular the needle elements 126 to be plugged.

For reasons of clarity are any openings 146 the top layers 142 for attaching or pushing on the cover layers 142 on the fasteners 124 and / or needle elements 126 in the 8th to 13 not shown.

After the two cover layers 142 in the in 9 shown right mold half 106 of the forming tool 102 are attached, the forming tool 102 preferably closed by the two mold halves 106 be moved together (see. 10 ).

Subsequently, preferably plastic material 116 , in particular thermoplastic material 117 , by means of the conveyor 114 between the two cover layers 142 injected by the plastic material 116 by means of the injector 122 in the injection channel 120 is injected. Preferably, the injection nozzle 122 while in the injection channel 120 directed into it.

The plastic material 116 can then through the injection channel 120 over the passage opening 146 in the core area 160 between the two cover layers 142 be injected.

The plastic material 116 is especially as a melt between the two cover layers 142 injected.

Due to the pressure of the plastic material 116 when injecting it between the two cover layers 142 become the two cover layers 142 preferably conforming to the respective wall 108 the mold halves 106 of the forming tool 102 created and adapt in particular to a contour 110 the wall 108 on.

In the 11 Cover layer shown on the left 142 when injecting the plastic material 116 preferably in the direction of the arrow 149 conforming to the wall 108 the mold half 106 created.

After the cavity 112 of the forming tool 102 completely with the plastic material 116 is filled, preferably no plastic material 116 more by means of the conveyor 114 between the two cover layers 142 promoted (cf. 12 ).

After cooling the sandwich component 140 this is preferably from the forming tool 102 removed, in particular ejected, and preferably cooled.

Preferably then still the sprue 166 from the sandwich component 140 away.

For the rest, this is true in the 8th to 13 illustrated second embodiment of the injection molding apparatus 100 in terms of structure and function with in the 1 to 7 shown in the first embodiment, so that reference is made to the above description thereof.

In the in the 1 to 17 shown embodiments of method for producing a sandwich component 140 can be on the core page 151 the top layers 142 arranged spacer elements 150 preferably in the finished sandwich component 140 remain.

Preferably, by the in the finished sandwich component 140 remaining spacer elements 150 a functionalization of the sandwich component 140 respectively.

Overall, a process-reliable method for producing a sandwich component 140 to be provided.

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

• DE 102014017200 A1 [0002]

Claims (15)

A method of making a sandwich component (140), the method comprising: Inserting two cover layers (142) into a forming tool (102) and / or fixing them in the forming tool (102) in such a way that the two cover layers (142) are arranged at least partially spaced apart from one another; Producing a core (164) arranged between the two cover layers (142) and fixing the two cover layers (142) in a final shape and / or in an end position by injecting a plastic material (116) between the two cover layers (142). Method according to Claim 1 , characterized in that one or both of the two cover layers (142) are heated prior to the introduction of the two cover layers (142) into the forming tool (102). Method according to Claim 1 or 2 , characterized in that the two cover layers (142) comprise a fiber-reinforced thermoplastic material, in particular a continuous fiber-reinforced thermoplastic material, or consist of a fiber-reinforced thermoplastic material, in particular of a continuous fiber-reinforced thermoplastic material. Method according to one of Claims 1 to 3 , characterized in that the two cover layers (142) are secured in one or more mold halves (106) of the forming tool (102), in particular fixed, before the forming tool (102) is closed. Method according to one of Claims 1 to 4 , characterized in that a thermoplastic material (117) is injected between the two cover layers (142). Method according to one of Claims 1 to 5 , characterized in that the two cover layers (142) by means of one or more spacer elements (150) at least partially spaced from each other. Method according to one of Claims 1 to 6 , characterized in that one or more spacer elements (150) between the two cover layers (142), in particular on a core side (151) of the two cover layers (142) are arranged. Method according to one of Claims 1 to 7 , characterized in that in each case a cover layer (142) by means of one or more spacer elements (150), which are fixed to a first mold half (106) of the forming tool (102) by closing the forming tool (102) against a second mold half (106) of the forming tool (102), in particular against a wall (108) of the second mold half (106) is pressed. Method according to one of Claims 1 to 8th , characterized in that in each case a cover layer (142) in each case a mold half (106) of the forming tool (102) is introduced. Method according to one of Claims 1 to 9 , characterized in that at least one of the two cover layers (142) before the injection of the plastic material (116) between the two cover layers (142) one or more passage openings (146) are introduced, wherein at least one of the cover layers (142) by means of one or a plurality of passage openings (146) in a mold half (106) of the forming tool (102) is attached, in particular in on the mold half (106) arranged fastening elements (124) is mounted. Method according to one of Claims 1 to 10 characterized in that one or more passage openings (146) are introduced into at least one of the two cover layers (142) prior to the injection of the plastic material (116) between the two cover layers (142), an injection nozzle for injecting the plastic material (116) between the two cover layers (142) at least partially project into the one or more passage openings (146) or into which one or more passage openings (146) are directed. Method according to one of Claims 1 to 11 , characterized in that a plastic material (116), which comprises a blowing agent, between the two cover layers (142) is injected and then at least partially foamed. Method according to one of Claims 1 to 12 , characterized in that one or both of the two cover layers (142) in particular conforming to a wall (108) of a mold half (106) of the forming tool (102) are applied. Method according to one of Claims 1 to 13 , characterized in that one or both of the two cover layers (142) during the introduction of the two cover layers (142) in the forming tool (102) are at least partially reshaped. Method according to one of Claims 1 to 14 , characterized in that a distance of the two cover layers (142) to each other during the injection of the plastic material (116) or after the injection of the plastic material (116) between the two cover layers (142) is constant or increased.

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