WO2006131103A1 - Device for foaming a component - Google Patents

Device for foaming a component Download PDF

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Publication number
WO2006131103A1
WO2006131103A1 PCT/DE2006/000986 DE2006000986W WO2006131103A1 WO 2006131103 A1 WO2006131103 A1 WO 2006131103A1 DE 2006000986 W DE2006000986 W DE 2006000986W WO 2006131103 A1 WO2006131103 A1 WO 2006131103A1
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WO
WIPO (PCT)
Prior art keywords
foaming
mold cavity
component
tool
separating layer
Prior art date
Application number
PCT/DE2006/000986
Other languages
German (de)
French (fr)
Inventor
Jürgen Heitzer
Karl Stangl
Original Assignee
Webasto Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Webasto Ag filed Critical Webasto Ag
Publication of WO2006131103A1 publication Critical patent/WO2006131103A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds

Definitions

  • the invention relates to a device for foaming a component, in particular for foaming a polyurethane component, according to the preamble of claim 1.
  • Such a device is known, for example, from DE 102 05 028 C1 and comprises a molding tool which is formed from two mold halves which define a mold cavity. Before each foaming process, a release agent must be applied in the area of the mold cavity to ensure non-destructive removal of the foamed component from the foaming mold.
  • release agents are, for example, silicone or wax-containing liquids that may be water-soluble or gasoline-soluble.
  • the foaming tool is wiped after application or spraying of the release agent to remove excess release agent with a tissue or nonwoven cloth.
  • the application of the release agent and the wiping of the Schwarzumtechnikmaschines are associated with a high expenditure of time, with material costs, a burden on the device operator and also with a high cleaning effort.
  • the release agent pollutes the environment.
  • the invention has for its object to provide a device for foaming a component, in which the application of a release agent prior to each foaming completely or partially omitted. This object is achieved by the device with the features of claim 1.
  • the core of the invention is therefore that the foaming tool in the region of the mold cavity at least partially has a permanent coating that favors the demolding of the foamed component, i. adhesion of the foam material, from which the foamed component is formed, on which foaming tool is prevented.
  • a liquid release agent can be completely or partially omitted before each foaming process. This leads to a time advantage over the previously used method.
  • the now possible abandonment of the liquid release agent leads to a relief of the environment and also to a discharge of a suction system, which is usually used in production halls for foamed components and extend their maintenance intervals. Also eliminates a costly cleaning of the foaming tool of liquid release agent residues. In addition, the entrusted with the care of the device people are relieved.
  • the component when producing a polyurethane foam component, such as a frame of a glass sunroof element, the component can be produced with the use of the device according to the invention with a glossy surface, without excess of excess wiping with a cloth or cloth before the foaming process would have to, as it has been used previously
  • the device according to the invention can in principle be used for foaming any components.
  • the device according to the invention can be designed so that it is for foaming a flat, substantially plate-like workpiece, such as a flat or curved glass sheet, which is used for example in a glass sliding roof of a motor vehicle as Deckelele- element used.
  • the glass sheet can be provided in the foaming tool with a plastic frame, which can be made of a polyurethane foam as usual and serves to receive a circumferential seal and / or for the connection of Einlegetei- len with the glass sheet, so that a connection of the glass sheet the vehicle body or a sunroof drive is possible.
  • the separating layer formed from a solid is formed from plastic, in particular a fluorine plastic.
  • plastic in particular a fluorine plastic.
  • fluorine plastics such as PTFE, FEP and / or PFA can be used, which have a good temperature resistance.
  • the release layer representing a release layer may be arranged on a so-called wear layer.
  • This is, for example, a metallic layer applied to the tool steel after a flame spraying process, which forms the carrier for the separating layer and has a certain roughness, which improves the wear behavior of the separating layer.
  • a special embodiment of the device according to the invention has at least one slide, wherein the slide is provided with the separating layer in its region adjacent to the mold cavity.
  • Figure 1 is a highly schematic bottom view of an upper tool of a device for foaming a plastic frame of a glass plate. and FIG. 2 shows a section along the line II-II in FIG. 1.
  • an apparatus for producing a consisting of a polyurethane foam plastic frame 11 of a glass cover member of a motor vehicle sunroof otherwise not shown here is shown.
  • the plastic frame 11 surrounds the edge region of a glass sheet 10.
  • the glass sheet 10 is inserted into the device, so that it is limited in its edge regions by a mold cavity 12 which is formed by a foaming tool 14.
  • the mold cavity 12 has a cross-section that substantially corresponds to that of the foamed plastic frame 11.
  • the foaming tool 14 comprises an upper tool 16 and a lower tool 18, which are separated from one another via a parting plane 20 and define the mold cavity or the mold cavity 12.
  • the mold cavity 12 which is formed along the edges of the rectangular glass sheet 10, has a sprue 22, via which liquid polyurethane can be introduced into the mold cavity, where it foams and hardens.
  • the sprue muzzle 22 is arranged in the region of a longitudinal side of the glass sheet 10.
  • a receptacle 24 for a vent slide 26 is formed in the upper tool 16, which defines a ventilation slot 28 together with the upper tool 14. Via the vent slot 28, which opens into the mold cavity 12, air can be displaced from the mold cavity 12 when the polyurethane material is introduced.
  • the lower tool 18, the upper tool 16 and the slider 26 in the region of the mold cavity 12 each have a release layer 30, 32 and 34 formed from a solid , which is formed in each case from a fluorine plastic, such as PTFE, and is arranged on a metallic wear layer not shown here for the sake of clarity.

Abstract

To facilitate the foaming of a component, and in particular its removal from a foaming mould, a device is proposed, comprising a foaming mould (14), in which a mould cavity (12) is formed, and coated at least in certain regions in the area of the mould cavity (12) with a release layer (30, 32, 34) formed by a solid substance. The durable release layer (30, 32, 34) makes it possible to dispense entirely or partly with the use of a liquid release agent.

Description

Vorrichtung zum Schäumen eines Bauteils Device for foaming a component
Die Erfindung eine Vorrichtung zum Schäumen eines Bauteils, insbesondere zum Schäumen eines Polyurethan- Bauteils, nach dem Oberbegriff des Patentanspruches 1.The invention relates to a device for foaming a component, in particular for foaming a polyurethane component, according to the preamble of claim 1.
Ein derartige Vorrichtung ist beispielsweise aus der DE 102 05 028 Cl bekannt und umfasst ein Formwerkzeug, das aus zwei Formhälften gebildet ist, die einen Formhohlraum definieren. Vor jedem Schäumprozess muss im Bereich des Formhohlraums ein Trennmittel aufgetragen werden, um ein zerstörungsfreies Entformen des geschäumten Bauteils aus dem Schäumwerkzeug zu gewährleisten.Such a device is known, for example, from DE 102 05 028 C1 and comprises a molding tool which is formed from two mold halves which define a mold cavity. Before each foaming process, a release agent must be applied in the area of the mold cavity to ensure non-destructive removal of the foamed component from the foaming mold.
Im Bereich von Schäumvorrichtungen eingesetzte Trennmittel sind beispielsweise silikon- oder wachshaltige Flüssigkeiten, die wasserlöslich oder auch benzinlöslich sein können. Um zu gewährleisten, dass die Oberfläche des zu fertigenden Bauteils eine hochwertig anmutende Oberfläche erhält, wird das Schäumwerkzeug nach dem Auftragen bzw. Aufsprühen des Trennmittels zum Entfernen von überschüssigem Trennmittel mit einem Gewebe- bzw. Faservlies- tuch nachgewischt. Das Aufbringen des Trennmittels und das Nachwischen des Schäumwerkzeugs sind mit einem hohen Zeitaufwand, mit Materialkosten, einer Belastung der die Vorrichtung bedienenden Person und auch mit einem hohen Reinigungsaufwand verbunden. Zudem belastet das Trennmittel die Umwelt.In the area of foaming devices used release agents are, for example, silicone or wax-containing liquids that may be water-soluble or gasoline-soluble. In order to ensure that the surface of the component to be manufactured receives a high-quality surface, the foaming tool is wiped after application or spraying of the release agent to remove excess release agent with a tissue or nonwoven cloth. The application of the release agent and the wiping of the Schäumwerkzeugs are associated with a high expenditure of time, with material costs, a burden on the device operator and also with a high cleaning effort. In addition, the release agent pollutes the environment.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Schäumen eines Bauteils zu schaffen, bei der der Auftrag eines Trennmittels vor jedem Schäumprozess ganz oder teilweise entfällt. Diese Aufgabe ist erfindungsgemäß durch die Vorrichtung mit den Merkmalen des Patentanspruches 1 gelöst .The invention has for its object to provide a device for foaming a component, in which the application of a release agent prior to each foaming completely or partially omitted. This object is achieved by the device with the features of claim 1.
Der Kern der Erfindung liegt mithin darin, dass das Schäumwerkzeug im Bereich des Formhohlraums zumindest bereichsweise eine dauerhafte Beschichtung aufweist, die das Entformen des geschäumten Bauteils begünstigt, d.h. ein Anhaften des Schaumwerkstoffs, aus dem das geschäumte Bau- teil gebildet ist, an dem Schäumwerkzeug verhindert. Dadurch kann das Auftragen eines flüssigen Trennmittels vor jedem Schäumprozess ganz oder teilweise entfallen. Dies führt gegenüber dem bisher eingesetzte Verfahren zu einem Zeitvorteil. Der nun mögliche Verzicht auf das flüssige Trennmittel führt zu einer Entlastung der Umwelt und auch zu einer Entlastung einer Absauganlage, welche üblicherweise in Produktionshallen für geschäumte Bauteile eingesetzt wird und deren Wartungsintervalle sich damit verlängern. Auch entfällt eine aufwendige Reinigung des Schäum- Werkzeugs von flüssigen Trennmittelrückständen. Zudem werden die mit der Betreuung der Vorrichtung betrauten Personen entlastet.The core of the invention is therefore that the foaming tool in the region of the mold cavity at least partially has a permanent coating that favors the demolding of the foamed component, i. adhesion of the foam material, from which the foamed component is formed, on which foaming tool is prevented. As a result, the application of a liquid release agent can be completely or partially omitted before each foaming process. This leads to a time advantage over the previously used method. The now possible abandonment of the liquid release agent leads to a relief of the environment and also to a discharge of a suction system, which is usually used in production halls for foamed components and extend their maintenance intervals. Also eliminates a costly cleaning of the foaming tool of liquid release agent residues. In addition, the entrusted with the care of the device people are relieved.
Insbesondere bei Herstellung eines Polyurethanschaum- Bauteiles, wie eines Rahmens eines gläsernen Schiebedachelementes kann das Bauteil bei Einsatz der Vorrichtung nach der Erfindung mit einer glänzenden Oberfläche hergestellt werden, ohne dass hierzu vor dem Schäumprozess ü- berschüssiges Trennmittel mit einem Tuch bzw. Lappen abge- wischt werden müsste, wie es bei bisher eingesetztenIn particular, when producing a polyurethane foam component, such as a frame of a glass sunroof element, the component can be produced with the use of the device according to the invention with a glossy surface, without excess of excess wiping with a cloth or cloth before the foaming process would have to, as it has been used previously
Schäumvorrichtungen erforderlich war.Foaming devices was required.
Die Vorrichtung nach der Erfindung kann grundsätzlich zum Schäumen beliebiger Bauteile eingesetzt werden. Insbe- sondere kann die Vorrichtung nach der Erfindung aber der- artig ausgelegt sein, dass sie zum Umschäumen eines flachen, im wesentlichen plattenartigen Werkstücks, wie einer planen oder gewölbten Glastafel, die beispielsweise bei einem Glasschiebedach eines Kraftfahrzeugs als Deckelele- ment zum Einsatz kommt, vorgesehen ist. In diesem Fall kann die Glastafel in dem Schäumwerkzeug mit einem Kunststoffrahmen versehen werden, der wie üblich aus einem Polyurethanschaum bestehen kann und zur Aufnahme einer umlaufenden Dichtung und/oder zur Verbindung von Einlegetei- len mit der Glastafel dient, so dass eine Anbindung der Glastafel an den Fahrzeugaufbau bzw. einen Schiebedachantrieb möglich ist.The device according to the invention can in principle be used for foaming any components. In particular, however, the device according to the invention can be designed so that it is for foaming a flat, substantially plate-like workpiece, such as a flat or curved glass sheet, which is used for example in a glass sliding roof of a motor vehicle as Deckelele- element used. In this case, the glass sheet can be provided in the foaming tool with a plastic frame, which can be made of a polyurethane foam as usual and serves to receive a circumferential seal and / or for the connection of Einlegetei- len with the glass sheet, so that a connection of the glass sheet the vehicle body or a sunroof drive is possible.
Bei einer speziellen Ausführungsform der Vorrichtung nach der Erfindung ist die aus einem Feststoff gebildete Trennschicht aus Kunststoff, insbesondere einem Fluor- Kunststoff, gebildet. Beispielsweise können Fluor- Kunststoffe wie PTFE, FEP und/oder PFA eingesetzt werden, die eine gute Temperaturbeständigkeit aufweisen.In a special embodiment of the device according to the invention, the separating layer formed from a solid is formed from plastic, in particular a fluorine plastic. For example, fluorine plastics such as PTFE, FEP and / or PFA can be used, which have a good temperature resistance.
Zur Erhöhung der Verschleißfestigkeit kann die eine Antihaftschicht darstellende Trennschicht auf einer so genannten Verschleißschicht angeordnet sein. Diese ist beispielsweise eine nach einem Flammspritzverfahren auf den Werkzeugstahl aufgebrachte metallische Schicht, die den Träger für die Trennschicht bildet und eine gewisse Rauhigkeit aufweist, was das Verschleißverhalten der Trennschicht verbessert .To increase the wear resistance, the release layer representing a release layer may be arranged on a so-called wear layer. This is, for example, a metallic layer applied to the tool steel after a flame spraying process, which forms the carrier for the separating layer and has a certain roughness, which improves the wear behavior of the separating layer.
Eine, spezielle Ausführungsform der Vorrichtung nach der Erfindung weist mindestens einen Schieber auf, wobei der Schieber in seinem an den Formhohlraum angrenzenden Bereich mit der Trennschicht versehen ist. Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes nach der Erfindung sind der Beschreibung, der Zeichnung und den Patentansprüchen entnehmbar.A special embodiment of the device according to the invention has at least one slide, wherein the slide is provided with the separating layer in its region adjacent to the mold cavity. Further advantages and advantageous embodiments of the article according to the invention are the description, the drawings and the claims removed.
Ein Ausführungsbeispiel einer Vorrichtung nach der Erfindung ist in der Zeichnung schematisch vereinfacht dargestellt und wird in der nachfolgenden Beschreibung näher erläutert . Es zeigtAn embodiment of a device according to the invention is shown schematically simplified in the drawing and will be explained in more detail in the following description. It shows
Fig. 1 eine stark schematisierte Unteransicht eines Oberwerkzeugs einer Vorrichtung zum Schäumen eines Kunststoffrahmens einer Glasplatte; und Fig. 2 einen Schnitt entlang der Linie II-II in Fig. 1.Figure 1 is a highly schematic bottom view of an upper tool of a device for foaming a plastic frame of a glass plate. and FIG. 2 shows a section along the line II-II in FIG. 1.
In der Zeichnung ist eine Vorrichtung zur Herstellung eines aus einem Polyurethanschaum bestehenden Kunststoff- rahmens 11 eines Glasdeckelelements eines hier ansonsten nicht näher dargestellten Kraftfahrzeugschiebedachs dargestellt. Der Kunststoffrahmen 11 umgibt den Randbereich einer Glastafel 10.In the drawing, an apparatus for producing a consisting of a polyurethane foam plastic frame 11 of a glass cover member of a motor vehicle sunroof otherwise not shown here is shown. The plastic frame 11 surrounds the edge region of a glass sheet 10.
Zum Umschäumen mit dem Kunststoffrahmen 11 wird die Glastafel 10 in die Vorrichtung eingelegt, so dass sie in ihren Randbereichen von einem Formhohlraum 12 begrenzt ist, der von einem Schäumwerkzeug 14 gebildet ist. Der Formhohlraum 12 hat einen Querschnitt, der im Wesentlichen demjenigen des angeschäumten Kunststoffrahmens 11 ent- spricht.For foaming with the plastic frame 11, the glass sheet 10 is inserted into the device, so that it is limited in its edge regions by a mold cavity 12 which is formed by a foaming tool 14. The mold cavity 12 has a cross-section that substantially corresponds to that of the foamed plastic frame 11.
Das Schäumwerkzeug 14 umfasst ein Oberwerkzeug 16 und ein Unterwerkzeug 18, die über eine Trennebene 20 von einander getrennt sind und den Formhohlraum bzw. das Formnest 12 definieren. Der Formhohlraum 12, der entlang der Kanten der rechteckigen Glastafel 10 ausgebildet ist, hat eine Angussmündung 22, über die flüssiges Polyurethan in den Formhohlraum eintragbar ist, wo dieses ausschäumt und aushärtet. Die Angussmündung 22 ist im Bereich einer Längsseite der Glastafel 10 angeordnet.The foaming tool 14 comprises an upper tool 16 and a lower tool 18, which are separated from one another via a parting plane 20 and define the mold cavity or the mold cavity 12. The mold cavity 12, which is formed along the edges of the rectangular glass sheet 10, has a sprue 22, via which liquid polyurethane can be introduced into the mold cavity, where it foams and hardens. The sprue muzzle 22 is arranged in the region of a longitudinal side of the glass sheet 10.
An der der Angussmündung 22 gegenüberliegenden Seite der Glastafel 10, d. h. in der Mitte der zweiten Längsseite des Formhohlraums 12, ist in dem Oberwerkzeug 16 eine Aufnahme 24 für einen Entlüftungsschieber 26 ausgebildet, der zusammen mit dem Oberwerkzeug 14 einen Entlüftungs- schlitz 28 begrenzt. Über den Entlüftungsschlitz 28, der in den Formhohlraum 12 mündet, kann beim Eintragen des Polyurethanwerkstoffs Luft aus dem Formhohlraum 12 verdrängt werden.At the opposite of the gate mouth 22 side of the glass sheet 10, d. H. in the middle of the second longitudinal side of the mold cavity 12, a receptacle 24 for a vent slide 26 is formed in the upper tool 16, which defines a ventilation slot 28 together with the upper tool 14. Via the vent slot 28, which opens into the mold cavity 12, air can be displaced from the mold cavity 12 when the polyurethane material is introduced.
Um ein zerstörungsfreies Entformen der Glastafel 10 mit dem angeschäumten Polyurethanrahmen 11 aus dem Schäumwerkzeug 14 zu gewährleisten, weisen das Unterwerkzeug 18, das Oberwerkzeug 16 und der Schieber 26 im Bereich des Formhohlraums 12 jeweils eine aus einem Feststoff gebildete Trennschicht 30, 32 bzw. 34 auf, die jeweils aus einem Fluor-Kunststoff, wie PTFE, gebildet ist und auf einer der Übersichtlichkeit halber hier nicht näher dargestellten metallischen Verschleißschicht angeordnet ist. In order to ensure a non-destructive demolding of the glass sheet 10 with the foamed polyurethane frame 11 from the foaming tool 14, the lower tool 18, the upper tool 16 and the slider 26 in the region of the mold cavity 12 each have a release layer 30, 32 and 34 formed from a solid , which is formed in each case from a fluorine plastic, such as PTFE, and is arranged on a metallic wear layer not shown here for the sake of clarity.
Bezugszeichenreference numeral
10 Glastafel10 glass plate
11 KunstStoffrahmen11 plastic frame
12 Pormhohlraum12 Porm cavity
14 Schäumwerkzeug14 foaming tool
16 Oberwerkzeug16 upper tool
18 Unterwerkzeug18 lower tool
20 Trennebene20 parting plane
22 Angussmündung22 sprue
24 Aufnahme24 recording
26 Entlüftungsschieber26 vent slide
28 Entlüftungsschlitz28 ventilation slot
30 Trennschicht30 separating layer
32 Trennschicht32 separating layer
34 Trennschicht 34 separating layer

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Vorrichtung zum Schäumen eines Bauteils, insbesondere zum Schäumen eines Polyurethanschaum-Bauteils, umfassend ein Schäumwerkzeug (14) , in dem ein Formhohlraum (12) ausgebildet ist, dadurch gekennzeichnet, dass das Schäumwerkseug (14) im Bereich des Formhohlraums (12) zumindest bereichsweise mit einer aus einem1. A device for foaming a component, in particular for foaming a polyurethane foam component, comprising a foaming tool (14) in which a mold cavity (12) is formed, characterized in that the Schäumwerkseug (14) in the region of the mold cavity (12) at least in some areas with one out of one
Feststoff gebildeten Trennschicht (30, 32, 34) beschichtet ist.Solid formed separating layer (30, 32, 34) is coated.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Trennschicht (30, 32, 34) aus Kunststoff, insbesondere einem Fluor-Kunststoff, wie PTFE, FEP und/oder PFA, gebildet ist.2. Apparatus according to claim 1, characterized in that the separating layer (30, 32, 34) made of plastic, in particular a fluorine plastic, such as PTFE, FEP and / or PFA, is formed.
3. Vorrichtung nach Anspruch 1 oder I1 dadurch gekenn- zeichnet, dass die Tennschicht (30, 32, 34) auf einer3. A device according to claim 1 or I 1 characterized marked, that the Tennschicht (30, 32, 34) on a
Verschleißschicht angeordnet ist.Wear layer is arranged.
4. Vorrichtung nach einem der Ansprüche 1 bis 3 , dadurch gekennzeichnet, dass mindestens ein Schieber (26) vorgesehen ist, und der Schieber (26) in seinem an den Formhohlraum (12) angrenzenden Bereich mit der Trennschicht (34) versehen ist. 4. Device according to one of claims 1 to 3, characterized in that at least one slide (26) is provided, and the slide (26) in its adjacent to the mold cavity (12) region with the separating layer (34) is provided.
1 /11/1
Figure imgf000010_0001
Figure imgf000010_0001
Figure imgf000010_0002
Figure imgf000010_0002
PCT/DE2006/000986 2005-06-09 2006-06-08 Device for foaming a component WO2006131103A1 (en)

Applications Claiming Priority (2)

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DE102005026730.0 2005-06-09

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DE202008005802U1 (en) 2008-04-25 2008-07-31 Webasto Ag Cover of a vehicle roof with a foamed frame and apparatus for producing such a lid
DE102010032095B4 (en) * 2010-07-23 2016-07-14 Faurecia Innenraum Systeme Gmbh Method for producing a decorative part and decorative part
DE102010051700B4 (en) * 2010-11-22 2014-03-20 Edag Gmbh & Co. Kgaa Visual component, process for its preparation and foaming tool for performing the method
DE102012211911B4 (en) * 2012-07-09 2017-08-31 Frimo Group Gmbh Device for manufacturing interior equipment components
DE202013103236U1 (en) 2013-07-19 2013-07-30 Faurecia Innenraum Systeme Gmbh Slider for a foaming tool
DE102017007098A1 (en) 2017-07-28 2019-01-31 Ruch Novaplast Gmbh + Co. Kg Slider for a foaming tool
CN113015762A (en) 2018-11-26 2021-06-22 慕贝尔碳纤维技术有限公司 Method for producing poly (meth) acrylimide material
DE202019100095U1 (en) * 2019-01-10 2020-04-15 Motherson Innovations Company Limited Molding tool for producing a foamed interior component for a motor vehicle, interior component for a motor vehicle and motor vehicle with such an interior component

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