DE102013215348A1 - Device for injection molding of a multi-part plastic component, method for producing multi-part plastic components and multi-part plastic component - Google Patents

Abstract

The invention relates to apparatus for injection molding a multi-part plastic component with - at least two outer tool elements (3) and - at least two between the outer tool elements (3) arranged inner tool elements (4), wherein - the outer tool elements (3) each having an adjacent side of inner tool elements (4a, 4c) each form a first cavity (5) into which by means of one or more injection units (1) for producing a Spritzgusseinzelteils a plastic molding compound can be introduced, wherein in at least a first cavity (5) forming a foam plastic molding material can be introduced is, wherein - the two inner tool elements (4) are rotatable and / or movable and on at least one side (4a, 4b) at least the inner tool element (4), which is provided for receiving the foam forming plastic molding compound, a second Cavity (6) is providable, with a curable Polymermas se is fillable and wherein - the device (10) has at least one joining unit (2) for joining the Kunststoffspritzgusseinzelteile formed in the first cavities (5).

Description

The present invention relates to a device for injection molding of a multi-part plastic component, a method for producing multi-part plastic components as well as multi-part plastic components produced by these methods.

Devices for injection molding a multi-part plastic component are known from the prior art. For example, describes DE 10 2007 014 847 A1 an injection molding device with a plurality of mutually movable and a plurality of cavities forming tool elements by means of plastic components with reduced cycle time can be produced. A disadvantage of these devices is that the resulting plastic components have a high weight due to their massiveness. In addition, a separate surface finishing process, usually with the application of a lacquer layer, is required for a visually appealing design. This increases the costs and the logistical effort for the production of the plastic component.

Based on this prior art, it is an object of the present invention to provide a device for injection molding of a multi-part plastic component, with the stable and simultaneously stress-free plastic components with reduced weight from several plastic parts can be produced in high timing and have a surface finishing layer. It is another object of the invention to provide simplified and thus cost-effective method for the production of multi-part plastic components that combine injection molding processes and surface finishing processes while allowing shorter cycle times. In addition, it is an object of the present invention to provide a multi-part plastic component, which has an attractive appearance with high stability despite reduced weight.

• – mindestens zwei äußeren Werkzeugelementen und
• – mindestens zwei zwischen den äußeren Werkzeugelementen angeordneten inneren Werkzeugelementen, wobei
• – die äußeren Werkzeugelemente mit jeweils einer angrenzenden Seite der inneren Werkzeugelemente jeweils eine erste Kavität bilden, in die mittels eines oder mehrerer Spritzaggregate zur Erzeugung eines Spritzgusseinzelteils eine Kunststoffformmasse einbringbar ist, wobei in mindestens eine erste Kavität eine einen Schaum bildende Kunststoffformmasse einbringbar ist, wobei
• – die zwei inneren Werkzeugelemente dreh- und/oder verfahrbar ausgebildet sind und an mindestens einer Seite mindestens des inneren Werkzeugelements, das zur Aufnahme der einen Schaum bildenden Kunststoffformmasse vorgesehen ist, eine zweite Kavität vorsehbar ist, die mit einer aushärtbaren Polymermasse befüllbar ist und
• – wobei die Vorrichtung mindestens ein Fügeaggregat zum Fügen der in den ersten Kavitäten gebildeten Kunststoffspritzgusseinzelteile aufweist.

The object is achieved by a device for injection molding a multi-part plastic component with

• - At least two outer tool elements and
• - At least two disposed between the outer tool elements inner tool elements, wherein
• - The outer tool elements, each with an adjacent side of the inner tool elements each form a first cavity into which by means of one or more injection units for producing a Spritzgusseinzelteils a plastic molding compound can be introduced, wherein in at least a first cavity, a foam forming plastic molding compound can be introduced
• - The two inner tool elements are rotatable and / or movable and formed on at least one side of at least the inner tool element, which is provided for receiving a foam-forming plastic molding compound, a second cavity is providable, which can be filled with a curable polymer composition and
• - Wherein the device has at least one joining unit for joining the Kunststoffspritzgusseinzelteile formed in the first cavities.

By providing a plurality of tool elements, wherein the inner tool elements are rotatable and / or movable, and form with the adjacent outer tool elements first cavities, at least two Kunststoffspritzgusseinzelteile can be made in parallel, which significantly reduces the cycle times of the production of the plastic component.

Due to the inventive construction that in at least a first cavity, a foam-forming plastic molding compound can be introduced, the plastic component formed can be made stress-free with reduced weight with high mechanical stability and shrinkage stability. While the formation of conventional plastic foam parts often produces an irregular surface due to the pore formation of the foam, a foamed Kunststoffspritzgusseinzelteil can be provided by introducing a foamable plastic molding compound into at least a first cavity, which is characterized by a high surface quality. This foamed Kunststoffspritzgusseinzelteil can be further processed in the device according to the invention for finishing at least part of its surface, so to produce a surface with further minimized surface roughness, and possibly corresponding optical effects, by the device further on at least one side of at least the inner tool element, the is provided for receiving a foam-forming plastic molding compound, a second cavity provides that can be filled with a curable polymer composition. Since this requires neither a separate device nor a removal of the foamed Kunststoffspritzgusseinzelteils from the device, thus further costs and time can be saved. If the curable polymer composition is not self-curing, the device according to the invention may further comprise suitable auxiliary devices which are suitable for promoting curing of the polymer composition, for example a tempering device or exposure device. By providing at least one joining unit for joining the plastic injection-molded parts formed in the first cavities, In the device according to the invention, the plastic injection-molded parts which are separately formed in the first cavities can also be joined, that is, connected to one another. Joining may be done in any conceivable manner and includes a material-fit or positive-fit joining (eg gluing or welding) or a combination thereof. The joining unit is preferably designed to provide an adhesive, such as, for example, a thermoplastic elastomer, which is applied to the corresponding parts of the plastic injection-molded parts to be joined and if necessary also cured. Alternatively, the joining unit can also be provided to provide a welded connection, for example by means of hot gas welding. Due to the arrangement of the individual components of the device according to the invention can be made in a very compact and thus space-saving device within a very short time a multi-part plastic component with, for example, a plastic-based substructure, a foamed outer skin and an overlying surface finishing layer. The logistical and cost outlay for the production of the plastic component is thereby effectively reduced.

The dependent claims contain advantageous developments and refinements of the invention.

According to an advantageous development of the device according to the invention, the sides of the inner tool elements or the outer tool elements have means for fixing the plastic injection molded parts produced in the first cavities. As a result, the plastic injection-molded parts which are produced in the first cavities remain fixed in the device even when the first cavities are opened, for example for turning, moving or removing the plastic injection-molded parts, so that slippage is prevented and in a further step a precise fitting of the plastic injection-molded parts becomes possible. Non-positive connections between the corresponding tool element and the adjacent Kunststoffspritzgusseinzelteil are particularly well suited as a means of fixing.

Due to the advantageous development that at least one of the outer tool elements is translationally movable, the first cavities can be very easily opened and closed, so that both the formation of Kunststoffspritzgusseinzelteile and joining to a plastic component can be simplified.

Advantageously, the inner tool elements on at least two sides, which can each form a first cavity with the outer tool elements, as can be formed by a simple process or rotating the inner tool elements immediately new first cavities between the inner tool elements and the outer tool elements. As a result, a plurality of plastic injection-molded parts can be formed in a device and further processed at the same time, that is, joined and / or surface-finished, which increases the timing of the production of the plastic components.

On at least one side of at least the inner tool element, which is provided for receiving the foam-forming plastic molding compound, according to the invention a second cavity can be provided. The second cavity can be present in open form on one of the sides of the inner tool element and, for example, can be turned toward the foamed plastic injection molded part by rotation of the inner tool element. Between the inner tool element and the adjacent outer tool element with the foamed Kunststoffspritzgusseinzelteil therebetween is thus provided on at least a portion of the foamed Kunststoffspritzgusseinzelteils a second cavity which can be filled with a curable polymer composition to refine at least a portion of the surface of the foamed Kunststoffspritzgusseinzelteils. Advantageously, the side with the second cavity but already in the formation of the foamed Kunststoffspritzgusseinzelteils in the first cavity on the surface to be refined of the foamed plastic injection molded part, since then an additional step, namely a rotation or a process it inner tool element for feeding the second Cavity with simultaneous fixation of the foamed Kunststoffspritzgusseinzelteils on the adjacent outer tool element, can be omitted. Thus, the second cavity is advantageously closed during the introduction of the plastic molding compound and the molding of the foamed Kunststoffspritzgusseinzelteils, for example by a slide o. Ä., And can be provided by operating a closure device, to be refined to the surface area.

• – Einbringen einer Kunststoffformmasse in die zwischen den äußeren Werkzeugelementen und den jeweils angrenzenden Seiten der inneren Werkzeugelemente gebildeten ersten Kavitäten, wobei mindestens eine der in die ersten Kavitäten einzubringenden Kunststoffformmassen eine einen Schaum bildende Kunststoffformmasse ist,
• – Ausformen der Kunststoffspritzgusseinzelteile,
• – Drehen und/oder Verfahren der beiden inneren Werkzeugelemente, so dass die Kunststoffspritzgusseinzelteile zueinander bewegt werden,
• – Fügen der beiden Kunststoffspritzgusseinzelteile, insbesondere durch Einspritzen eines Adhäsivs in einen von den zwei Kunststoffspritzgusseinzelteilen gebildeten Fügehohlraum unter Bildung eines Kunststoffbauteils,
• – Vorsehen der zweiten Kavität an dem geschäumten Kunststoffspritzgusseinzelteil des Kunststoffbauteils,
• – Befüllen der zweiten Kavität mit einer aushärtbaren Polymermasse so dass die aushärtbare Polymermasse mindestens einen Teil einer Oberfläche des geschäumten Kunststoffspritzgusseinzelteils bedeckt,
• – Aushärten der aushärtbaren Polymermasse und
• – Entformen des Kunststoffbauteils.

Furthermore, the invention also relates to a first method for producing multi-part plastic components by means of a device as described above. The method comprises the following steps:

• Introducing a plastic molding compound into the first cavities formed between the outer tool elements and the respective adjacent sides of the inner tool elements, at least one of the plastic molding compounds to be introduced into the first cavities being a plastic molding compound forming a foam,
• Molding the plastic injection-molded parts,
• Turning and / or moving the two inner tool elements so that the plastic injection-molded parts are moved relative to one another,
• Joining the two plastic injection-molded parts, in particular by injecting an adhesive into a joining cavity formed by the two plastic injection-molded parts to form a plastic component,
• Providing the second cavity on the foamed Kunststoffspritzgusseinzelteil the plastic component,
• Filling the second cavity with a curable polymer mass so that the curable polymer composition covers at least part of a surface of the foamed plastic injection molded part,
• - curing the curable polymer composition and
• - Mold removal of the plastic component.

By simultaneously forming a plurality of plastic injection molded parts in the first cavities, which are formed by the inner tool elements and the adjacent outer tool elements, preferably by a step of closing the corresponding tool elements, all Kunststoffspritzgusseinzelteile required for the plastic component to be produced can be made in parallel, which is a high Timing in the manufacturing process conditionally.

In this case, a foamed Kunststoffspritzgusseinzelteil is formed in at least a first cavity. For this purpose, foamable plastic molding compound is preferably introduced into this cavity physically (added by the plastic molding compound) or chemically (by splitting off a foaming molecule such as nitrogen or carbon dioxide from the plastic molding compound itself). Suitable plastic molding compounds are available on the market.

The molding may include conventional steps, such as cooling the plastic molding compound or otherwise curing step. By turning and / or moving the two inner tool elements, the molded plastic injection-molded parts are moved relative to one another. Preferably, they are fixed to the inner tool elements in order to prevent slippage and to perform a fitting accurately. The joining can be done for example by forming a positive connection between the Kunststoffspritzgusseinzelteilen. In particular, the joining takes place, in particular, alternatively or additionally thereto, by injecting an adhesive into a joining hollow space formed by the two plastic injection-molded parts to form the plastic component. For this purpose, additional process steps, such as curing steps, can be provided.

For refining at least a part of the surface of the foamed Kunststoffspritzgusseinzelteils contained in the plastic component, a second cavity is then provided on the foamed Kunststoffspritzgusseinzelteil. The second cavity is then filled with a curable polymer composition and then cured. By means of this refining step, in particular manufacturing-related surface defects are covered and the formation of a homogeneously structured surface is promoted. The plastic component thus receives the requirements for exterior skin or interior components in the automotive industry corresponding optics.

The curable polymer composition is not limited in detail, but is such that it forms a uniform film upon curing which preferably not only provides an optical effect but also imparts mechanical and chemical stability to provide a durable, stable plastic component. Depending on the field of application, the surface refinement formed from the curable polymer composition can impart further functionalities, such as corrosion stability, hydrophobing properties, sensory properties, antioxidant properties or optical effects.

The process according to the invention concludes with the removal of the plastic component. The demolding can be done by opening the inner tool elements, for example by twisting or moving one or both inner tool elements.

The inventive method multipart plastic components with, due to the proportion of foamed plastic molding composition compared to conventional plastic injection molded parts, reduced dead weight, stress-free and thus minimized shrinkage produced with very high timing in a continuous process, which have a refined surface, and thus especially for decorative Elements, for example in vehicle construction (interior components or functional components such as spoilers, doors, tailgates, front flaps, rear panels and other screens such as diaphragms of A, B, or C columns, etc.) are suitable. The particular plastic molding compounds used may be the same or different. Their composition and shape depends on the intended use of the plastic component to be produced. By injecting or injecting a plastic molding compound forming a foam into both first cavities, a further weight reduction of the plastic component to be produced can be achieved and, for example, a foamed plastic component having a substructure, an outer skin and an applied on at least a part of the outer skin Surface finishing, to be created. Since the plastic items do not have to be removed from the device during the process, but are processed immediately, the process of the invention not only saves time, but it is also possible to produce dimensionally stable plastic components made of plastic parts with very thin wall thicknesses. In addition, separate time-consuming and costly refining steps are eliminated.

The advantageous refinements, embodiments, advantages and advantageous effects described for the device according to the invention for injection molding of a multipart plastic component are also applicable to the method according to the invention for producing multipart plastic components.

• – Fügens der beiden Kunststoffspritzgusseinzelteile,
• – Vorsehens der zweiten Kavität (6) an dem geschäumten Kunststoffspritzgusseinzelteil des Kunststoffbauteils,
• – Befüllens der zweiten Kavität (6) mit einer aushärtbaren Polymermasse so dass die aushärtbare Polymermasse mindestens einen Teil einer Oberfläche des geschäumten Kunststoffspritzgusseinzelteils bedeckt und vorteilhafterweise auch
• – des Aushärtens der aushärtbaren Polymermasse

können die Zykluszeiten der Herstellung des Kunststoffbauteils weiter verkürzt werden.By parallel execution of the steps of

• - joining the two plastic injection-molded parts,
• Providing the second cavity ( 6 ) on the foamed Kunststoffspritzgusseinzelteil the plastic component,
• Filling the second cavity ( 6 ) with a curable polymer composition so that the curable polymer composition covers at least part of a surface of the foamed Kunststoffspritzgusseinzelteils and advantageously also
• - The curing of the curable polymer composition

The cycle times of the production of the plastic component can be further shortened.

• – Einbringen einer Kunststoffformmasse in die zwischen den äußeren Werkzeugelementen und den jeweils angrenzenden Seiten der inneren Werkzeugelemente gebildeten ersten Kavitäten, wobei mindestens eine der in die ersten Kavitäten einzubringende Kunststoffformmassen eine einen Schaum bildende Kunststoffformmasse ist,
• – Ausformen der Kunststoffspritzgusseinzelteile,
• – Vorsehen der zweiten Kavität an dem geschäumten Kunststoffspritzgusseinzelteil,
• – Befüllen der zweiten Kavität mit einer aushärtbaren Polymermasse so dass die aushärtbare Polymermasse mindestens einen Teil einer Oberfläche des geschäumten Kunststoffspritzgusseinzelteils bedeckt,
• – Aushärten der aushärtbaren Polymermasse,
• – Drehen und/oder Verfahren der beiden inneren Werkzeugelemente, so dass die Kunststoffspritzgusseinzelteile zueinander bewegt werden,
• – Fügen der beiden Kunststoffspritzgusseinzelteile, insbesondere durch Einspritzen eines Adhäsivs in einen von den zwei Kunststoffspritzgusseinzelteilen gebildeten Fügehohlraum unter Bildung eines Kunststoffbauteils und
• – Entformen des Kunststoffbauteils

umfasst. Im Vergleich zu dem vorstehend beschriebenen ersten Verfahren zur Herstellung von mehrteiligen Kunststoffbauteilen unterscheidet sich dieses alternative Verfahren dadurch, dass das Aufbringen der aushärtbaren Polymermasse zur Bildung einer Oberflächenveredelung auf mindestens einem Teil einer Oberfläche des geschäumten Kunststoffspritzgusseinzelteils vor dem Fügen der Kunststoffspritzgusseinzelteile erfolgt. Im Übrigen sind die für das vorstehend beschriebene Verfahren offenbarten Effekte und Vorteile auch für das alternative Verfahren gültig. Somit zeichnet sich auch das alternative Verfahren zur Herstellung von mehrteiligen Kunststoffbauteilen durch eine zeit- und kostensparende kontinuierliche Prozessführung aus, die das Herstellen von mehrteiligen Kunststoffbauteilen in Leichtbauweise mit einer Oberflächenveredelung und hoher qualitativer Güte erlaubt.Furthermore, according to the invention, an alternative method for the production of multi-part plastic components by means of a device as disclosed above is described, which comprises the steps:

• Introducing a plastic molding compound into the first cavities formed between the outer tool elements and the respectively adjacent sides of the inner tool elements, at least one of the plastic molding compounds to be introduced into the first cavities being a plastic molding compound forming a foam,
• Molding the plastic injection-molded parts,
• Providing the second cavity on the foamed plastic injection molded part,
• Filling the second cavity with a curable polymer mass so that the curable polymer composition covers at least part of a surface of the foamed plastic injection molded part,
• Curing of the curable polymer composition,
• Turning and / or moving the two inner tool elements so that the plastic injection-molded parts are moved relative to one another,
• - Joining the two Kunststoffspritzgusseinzelteile, in particular by injecting an adhesive into a joining cavity formed by the two plastic injection molded parts to form a plastic component and
• - Mold removal of the plastic component

includes. Compared to the above-described first method for producing multi-part plastic components, this alternative method differs in that the application of the curable polymer composition to form a surface finish on at least a portion of a surface of the foamed Kunststoffspritzgusseinzelteils before joining the Kunststoffspritzgusseinzelteile. Incidentally, the effects and advantages disclosed for the method described above are also valid for the alternative method. Thus, the alternative process for the production of multi-part plastic components is characterized by a time and cost-saving continuous process management, which allows the production of multi-part plastic components in lightweight construction with a surface finish and high quality.

In both methods according to the invention, as an alternative to a joining process by providing an adhesive, other joining processes for joining the two injection-molded plastic parts may be used, such as joining by means of welding methods, such as welding. B. hot gas welding.

Preferably, the methods according to the invention are characterized in that the provision of the second cavity is effected by opening a closure device. The closure device, such as a pusher or the like, is readily exposed and closeable from outside the device so that the cavity is opened only prior to filling the second cavity with a curable polymer composition to produce a surface finish on at least a portion of the surface of the foamed plastic injection molded article. and otherwise protected from contamination by closing. This eliminates a twisting or moving the inner tool elements, so that the creation of the surface finishing can be done substantially without delay.

Alternatively, the arrangement of the second cavity can also be carried out by a rotation, method or, in particular, by rotating an inner tool element, feeding a side of the inner tool element provided with a second cavity. This procedure is particularly suitable for very thin surface finishing layers.

The method according to the invention is advantageously further developed in that the curable polymer composition is a polyurethane composition and / or that the adhesive is a thermoplastic elastomer. Polyurethane compositions are very easy to cure and are characterized by very good mechanical stability and a high surface quality and due to their usually low viscosity by a good flow behavior, so that a surface finish with high quality and a minimum amount of surface defects can be produced. Thermoplastic elastomers are characterized by very good adhesive properties and easy processability, so that a permanently joined plastic component is obtained in a simple manner.

Also according to the invention, a multi-part plastic component is described which comprises at least two Kunststoffspritzgusseinzelteile, wherein at least one Kunststoffspritzgusseinzelteil is formed from a foamable plastic molding compound foamed Kunststoffspritzgusseinzelteil, the Kunststoffspritzgusseinzelteile, for example by means of a cohesive joining process, such as an adhesive or welding process, preferably using a Adhesive, and at least a part of a surface of the foamed Kunststoffspritzgusseinzelteils a cured polymer layer is disposed, wherein the multi-part plastic component is prepared by a method as described above. The multi-part plastic component according to the invention is characterized by a low weight, a high mechanical stability, such as dimensional stability and resistance to shrinkage and an attractive appearance and therefore finds particular use as a decorative and / or functional component, for example as an interior component in motor vehicle construction.

The advantageous developments, embodiments, advantages and advantageous effects described for the device according to the invention for injection molding of a multipart plastic component and for the method according to the invention for producing multipart plastic components are also applicable to the multipart plastic component according to the invention.

Further details, features and advantages of the invention will become apparent from the following description and the figure. It shows:

1 a schematic representation of a device according to the invention for injection molding a multi-part plastic component.

In the figure, only the parts of interest of the device according to the invention are shown, all other elements are omitted for clarity.

In detail shows 1 a device 10 for producing a multipart plastic component by means of injection molding, the two outer tool elements 3 and two inner tool elements 4 each having two sides of the inner tool elements 4a . 4b . 4c . 4d around a rotatable and / or movable bar 9 are arranged, and, as shown here, for example, opposite each other. By the turning or driving function of the spar 9 can the sides of the inner tool elements 4a . 4b . 4c . 4d be arranged to each other, for example, to add two Kunststoffspritzgusseinzelteile, or moved away from each other, for example, to demold the plastic component formed from at least two joined Kunststoffspritzgusseinzelteilen.

The outer tool elements 3 are also at respective bars 11 arranged, with the spars 11 can also be moved, preferably formed translationally movable to open and close the device 10 to simplify.

Between the outer tool elements 3 and the adjacent sides of the inner tool elements 4a . 4c are in the closed state of the device as shown here 10 first cavities 5 formed, in the means of appropriate injection units 1 one plastic molding compound in each of the first cavities 5 can be injected. At least one plastic molding compound is a foam-forming plastic molding compound and the injection unit 1 is designed accordingly, this foam-forming plastic molding compound homogeneously in the corresponding cavity 5 contribute.

After shaping the plastic injection molded parts in the cavities 5 , for example, by a translational movement of the spars 11 and / or by twisting or moving the spars 9 an opening of the first cavities 5 be executed. Preferably, the Kunststoffspritzgusseinzelteile are on the sides of the inner tool elements 4a . 4c fixed by suitable means. For example, by a rotational movement of the spars 9 , which is illustrated by the arrows on the bars, now the plastic injection molded parts are moved to each other.

Then there is a joining of the two plastic injection molded parts. The joining comprises the formation of a bonded connection, for example by an adhesive process or a welding process, such as hot gas welding. As in 1 this is done advantageously by injecting an adhesive into one of the Plastic injection molded parts formed Fügehohlraum means of a joining unit 2 ,

To form each of the same plastic components from corresponding Kunststoffspritzgusseinzelteilen are the sides of the inner tool elements 4a and 4b or the sides of the inner tool elements 4d and 4c each constructed identically. The sides of the inner tool elements 4a and 4b have closure devices 7 on, by means of which second cavities 6 can be provided. Also the sides of the inner tool elements 4d and 4c can, depending on the trainees plastic component closure devices, by means of which second cavities can be provided. Advantageously, in a through an external tool element 3 and a page 4c an inner tool element, a substructure of the plastic component to be produced and in a through an outer tool element 3 and a page 4a an inner tool element generates an outer skin of the plastic component to be produced.

In particular, after the joining, but also before the joining of the plastic injection-molded parts, and in particular already during the molding of the Kunststoffspritzgusseinzelteile, which are on the sides of the inner tool elements 4a . 4b provided closure devices 7 , for example in the form of sliders, actuated to second cavities 6 which then communicates with at least part of the surface of at least one foamed Kunststoffspritzgusseinzelteils, so that via polymer conveying devices 8th a curable polymer mass in the cavities 6 and thus reaches the surface of at least one foamed Kunststoffspritzgusseinzelteils. After curing of the curable polymer composition, this forms a surface finish of the plastic component.

After joining the Kunststoffspritzgusseinzelteile then the finished multi-part plastic component with surface finishing by re-process or turning the spars 9 and thus moving apart of the inner tool elements 4 the plastic component is exposed and removed.

The device according to the invention 10 In addition to the first and second cavities as described above, further cavities can be provided, for example in order to form multilayer plastic injection molded parts or to apply several surface finishes next to or above one another.

The foregoing description of the present invention is for illustrative purposes only, and not for the purpose of limiting the invention. Various changes and modifications are possible within the scope of the invention without departing from the scope of the invention and its equivalents.

LIST OF REFERENCE NUMBERS

1

injection units

2

trimming unit

3

outer tool elements

4

inner tool elements

4a-d

Pages of the inner tool elements

5

first cavities

6

second cavities

7

closure device

8th

Polymer conveyor

9

Holme

10

Device for injection molding a multipart plastic component

11

Holme

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 102007014847 A1 [0002]

Claims (12)

Device for injection molding a multipart plastic component with - at least two outer tool elements ( 3 ) and - at least two between the outer tool elements ( 3 ) arranged inner tool elements ( 4 ), wherein - the outer tool elements ( 3 ) each with an adjacent side of the inner tool elements ( 4a . 4c ) each have a first cavity ( 5 ) into which by means of one or more injection units ( 1 ) can be introduced to produce an injection molded item a plastic molding compound, wherein in at least a first cavity ( 5 ) a foam-forming plastic molding compound can be introduced, wherein - the two inner tool elements ( 4 ) are rotatable and / or movable and formed on at least one side ( 4a . 4b ) at least the inner tool element ( 4 ), which is provided for receiving the foam-forming plastic molding compound, a second cavity ( 6 ), which can be filled with a curable polymer composition, and wherein - the device ( 10 ) at least one joining aggregate ( 2 ) for joining in the first cavities ( 5 ) has formed Kunststoffspritzgusseinzelteile. Apparatus according to claim 1, characterized in that the sides of the inner tool elements ( 4a . 4b . 4c . 4d ) or the outer tool elements ( 3 ) Means for fixing the in the first cavities ( 5 ) have produced Kunststoffspritzgusseinzelteile. Apparatus according to claim 1 or 2, characterized in that at least one of the outer tool elements ( 3 ) is translationally movable. Device according to one of the preceding claims, characterized in that the inner tool elements ( 4 ) have at least two sides, each with the outer tool elements ( 3 ) a first cavity ( 5 ) can train. Device according to one of the preceding claims, characterized in that on at least one side ( 4a . 4b ) at least the inner tool element ( 4 ), which is provided for receiving the foam-forming plastic molding compound, at least one closure device ( 7 ) for opening and closing the second cavity ( 6 ) is provided. Method for producing multipart plastic components by means of a device according to one of the preceding claims, comprising the steps of: - introducing a plastic molding compound into the space between the outer tool elements ( 3 ) and the respective adjacent sides of the inner tool elements ( 4a . 4c ) formed first cavities ( 5 ), wherein at least one of the first cavities ( 5 ) is a plastic molding compound forming a foam, - shaping the plastic injection-molded parts, - turning and / or moving the two inner tool elements ( 4 ), so that the plastic injection-molded parts are moved toward one another, - joining the two plastic injection-molded parts, in particular by injecting an adhesive into a joining cavity formed by the two plastic injection-molded parts to form a plastic component, - providing the second cavity ( 6 ) on the foamed Kunststoffspritzgusseinzelteil the plastic component, - filling the second cavity ( 6 ) with a curable polymer composition so that the curable polymer composition covers at least part of a surface of the foamed Kunststoffspritzgusseinzelteils, - curing of the curable polymer composition and - demolding of the plastic component. A method according to claim 6, characterized in that the steps of - joining the two Kunststoffspritzgusseinzelteile, - providing the second cavity ( 6 ) on the foamed Kunststoffspritzgusseinzelteil the plastic component, - filling the second cavity ( 6 ) with a curable polymer composition so that the curable polymer composition covered at least a portion of a surface of the foamed Kunststoffspritzgusseinzelteils and advantageously also - the hardening of the curable polymer mass done in parallel. Process for the production of multi-part plastic components by means of a device according to one of claims 1 to 5, comprising the steps: - introducing a plastic molding compound into the between the external tool elements ( 3 ) and the respective adjacent sides of the inner tool elements ( 4a . 4c ) formed first cavities ( 5 ), wherein at least one of the first cavities ( 5 ) is a plastic molding compound forming a foam, - shaping the plastic injection-molded parts, - providing the second cavity ( 6 ) on the foamed plastic injection-molded part, - filling the second cavity ( 6 ) with a curable polymer composition so that the curable polymer composition covers at least part of a surface of the foamed plastic injection molded part, curing of the curable polymer composition, Turning and / or moving the two inner tool elements ( 4 ), so that the Kunststoffspritzgusseinzelteile are moved to each other, - joining the two plastic injection molded parts, in particular by injecting an adhesive into a joining cavity formed by the two Kunststoffspritzgusseinzelteilen to form a plastic component and - demolding of the plastic component. Method according to one of claims 6 to 8, characterized in that the provision of the second cavity ( 6 ) by opening a closure device ( 7 ) he follows. Method according to one of claims 6 to 8, characterized in that the provision of the second cavity ( 6 ) by rotating an inner tool element ( 4 ) and feeding one with a second cavity ( 6 ) ( 4a . 4b ) of the inner tool element ( 4 ), he follows. Method according to one of claims 6 to 10, characterized in that the polymer composition is a polyurethane composition and / or that the adhesive is a thermoplastic elastomer. A multi-part plastic component, comprising at least two plastic injection molded parts, wherein at least one Kunststoffspritzgusseinzelteil is formed from a foamable plastic molding compound foamed Kunststoffspritzgusseinzelteil, the Kunststoffspritzgusseinzelteile are connected by means of an adhesive and at least a part of a surface of the foamed Kunststoffspritzgusseinzelteils a cured polymer layer is arranged, wherein the multi-part plastic component is produced by a method according to any one of claims 6 to 11.

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