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DE10022686A1 - Twin slush skin molding process for producing vehicle instrument panels, permits variation of process parameters during all molding stages - Google Patents

Twin slush skin molding process for producing vehicle instrument panels, permits variation of process parameters during all molding stages

Info

Publication number
DE10022686A1
DE10022686A1 DE2000122686 DE10022686A DE10022686A1 DE 10022686 A1 DE10022686 A1 DE 10022686A1 DE 2000122686 DE2000122686 DE 2000122686 DE 10022686 A DE10022686 A DE 10022686A DE 10022686 A1 DE10022686 A1 DE 10022686A1
Authority
DE
Germany
Prior art keywords
slush skin
molding
twin
parameters during
vehicle instrument
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
DE2000122686
Other languages
German (de)
Inventor
Heiko Gabbert
Jochen Blaurock
Joerg Mohr
Katja Peters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Priority to DE2000122686 priority Critical patent/DE10022686A1/en
Priority to EP01250116A priority patent/EP1149677A3/en
Publication of DE10022686A1 publication Critical patent/DE10022686A1/en
Withdrawn legal-status Critical Current

Links

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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/46—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles using fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/18—Slush casting, i.e. pouring moulding material into a hollow mould with excess material being poured off
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/22—Making multilayered or multicoloured articles
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/46—Heating or cooling
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/52—Measuring, controlling or regulating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

A first solid plastic layer (18) is moulded against the surface of an electroformed tool and then a second expanded plastic layer (14) is formed onto the first layer. The inner surface of the second layer is shaped either by a tool punch or a plastic carrier (16) which remains as part of the molding. All molding, forming and demolding parameters can be influenced during the process stages. An Independent claim is made for a tool for producing a twin slush skin product (20) including outer (10) and inner (16) parts for forming the outer and inner contours of the product with a space between for expanding one (14) of the material layers and various means for influencing the parameters of the various process stages.

Description

Die Erfindung betrifft eine Vorrichtung zur Herstellung einer Doppelslushhaut mit den im Oberbegriff des Anspruchs 1 genannten Merkmalen.The invention relates to a device for producing a double slush skin with the The preamble of claim 1 mentioned features.

Aus der WO 96/3306 und WO 97/48537 sind Verfahren und Vorrichtungen zur Herstellung einer Doppelslushhaut bekannt. Diese Doppelslushhäute werden in Verbindung mit einem Instrumententräger unter anderem für automobile Instrumententafeln eingesetzt. Die Herstellung erfolgt in einer Galvanoform mit einer die Außenkontur der Doppelslushhaut bestimmenden Form. In diese Galvanoform wird ein Polymerpulver eingebracht. Durch Rotation der Galvanoform bildet sich an einer beheizbaren Innenwandung der Galvanoform aus dem Polymerpulver eine kompakte Formhaut. Anschließend wird der Galvanoform ein zweites, mit Treibmitteln beaufschlagtes Polymerpulver zugeführt. Durch erneute Rotation der Galvanoform bildet sich an der bereits vorhandenen kompakten Formhaut eine Schaumschicht. Der anschließende Schäumungsprozess und die Ausbildung der Innenkontur der Doppelslushhaut kann auf zwei grundsätzlich verschiedene Arten erfolgen.Methods and devices for the production are known from WO 96/3306 and WO 97/48537 a double slush skin known. These double slush skins are combined with a Instrument carriers used for automotive instrument panels, among others. The Manufactured in an electroplated form with an outer contour of the double slush skin determining form. A polymer powder is introduced into this galvanoform. By Rotation of the electroform forms on a heatable inner wall of the electroform a compact molded skin from the polymer powder. Then the electroform is turned on second polymer powder charged with blowing agents. By renewed rotation the galvanoform forms on the already existing compact molded skin Foam layer. The subsequent foaming process and the formation of the The inner contour of the double slush skin can be done in two fundamentally different ways.

In die Galvanoform wird ein sogenannter Formstempel mit einer der Innenkontur der Doppelslushhaut definierten Kontur eingefahren. Danach beginnt der Schäumungsprozess durch Expansion des mit Treibmitteln beaufschlagten Polymerpulvers. Nach Beendigung des Schäumvorganges wird der Formstempel ausgefahren und die Doppelslushhaut entformt.A so-called form stamp with one of the inner contours of the Double slush skin defined contour. Then the foaming process begins by expansion of the polymer powder charged with blowing agents. After completing the The foaming process is extended and the double slush skin is removed from the mold.

In einer zweiten Art der Herstellung wird in die Galvanoform direkt der Kunststoffträger mit einer ebenfalls der Innenkontur der Doppelslushhaut definierten Kontur eingefahren. Danach beginnt wiederum der Schäumungsprozess durch Expansion des mit Treibmitteln beaufschlagten Polymerpulvers, wobei gleichzeitig eine Verbindung der Doppelslushhaut mit dem Kunststoffträger erfolgt. Nach Beendigung des Schäumvorganges erfolgt ebenfalls die Entformung des Verbundbauteiles aus der Galvanoform.In a second type of production, the plastic carrier is directly in the galvanoform a contour also defined the inner contour of the double slush skin. After that the foaming process begins again by expanding the blowing agent acted upon polymer powder, at the same time a connection of the double slush skin with the plastic carrier. After the foaming process is completed, the Demolding of the composite component from the electroforming.

Bei dem Schäumungsprozess des mit Treibmitteln beaufschlagten Polymerpulvers wird zur Erzielung der definierten Innenkontur der Doppelslushhaut in die Galvanoform entweder der Formstempel oder der Kunststoffträger eingefahren. Die Abformprozesse der Doppelslushhaut erfolgen dabei durch Druckbeaufschlagung über den Formstempel beziehungsweise den Kunststoffträger. Durch die Galvanoform müssen die dabei auftretenden Druckkräfte aufgenommen werden. In der Regel bestehen die Galvanoformen aus dünnwandigen, mit einer gleichbleibenden Wandstärke versehene Formen, die im Galvanisierungsverfahren hergestellt wurden. Diese Galvanoformen können die beim Herstellungsprozess der Doppelslushhaut entstehenden Druckkräfte nicht vollständig aufnehmen. Das hat zur Folge, dass sich die Form während des Herstellungsprozesses verzieht. Formänderungen an der zu erzeugenden Doppelslushhaut sind nicht zu vermeiden.In the foaming process of the polymer powder charged with blowing agents, the Achieving the defined inner contour of the double slush skin in either the galvanoform Form stamp or the plastic carrier retracted. The impression processes of the Double slush skin is created by pressurizing the die  or the plastic carrier. Because of the galvanoform they have to be there occurring pressure forces are absorbed. As a rule, the galvanoforms exist made of thin-walled shapes with a constant wall thickness Electroplating processes were produced. These galvanoforms can be used for The manufacturing process of the double slush skin does not completely develop the pressure forces take up. As a result, the shape changes during the manufacturing process warps. Changes in shape of the double slush skin to be produced cannot be avoided.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zur Herstellung einer Doppelslushhaut zur Verfügung zu stellen, die die beim Herstellungsprozess der Doppelslushhaut auftretenden Druckkräfte ohne Formveränderungen aufnehmen kann und die eine erhöhte Biegesteifigkeit gegenüber den bekannten Vorrichtungen aufweist.The invention is therefore based on the object of a device for producing a To provide double slush skin which is used in the manufacturing process of Double slush skin can absorb compressive forces occurring without changes in shape and which has an increased bending stiffness compared to the known devices.

Diese Aufgabe wird durch eine Vorrichtung zur Herstellung einer Doppelslushhaut mit den in dem Anspruch 1 genannten Merkmalen gelöst. Dadurch, dass an den Außenseiten der Galvanoform Versteifungen angeordnet sind, wird die Biegesteifigkeit der Galvanoform wesentlich erhöht. Die durch den Formstempel oder den Kunststoffträger in die Galvanoform eingebrachten Druckkräfte können durch die Form aufgenommen werden, ohne dass dabei Formveränderungen an der Galvanoform auftreten. Dadurch werden auch Formänderungen an der herzustellenden Kontur der Doppelslushhaut nahezu ausgeschlossen.This object is achieved by a device for producing a double slush skin with the in the features mentioned claim solved. The fact that on the outside of the Galvanoform stiffeners are arranged, the bending stiffness of the galvanoform significantly increased. The through the form stamp or the plastic carrier in the electroform The pressure forces introduced can be absorbed by the mold without doing so Shape changes to the galvanoform occur. This also changes shape almost impossible on the contour of the double slush skin to be produced.

Weitere bevorzugte Ausgestaltungen der Erfindung ergeben sich aus den übrigen, in den Unteransprüchen genannten Merkmalen.Further preferred refinements of the invention result from the others in the Characteristics mentioned subclaims.

Die Erfindung wird nachfolgend in einem Ausführungsbeispiel anhand der zugehörigen Zeichnung, die eine Seitenansicht der erfindungsgemäßen Vorrichtung zur Herstellung einer Doppelslushhaut zeigt, näher erläutert.The invention is described in an exemplary embodiment based on the associated Drawing, which is a side view of the device according to the invention for producing a Double slush skin shows, explained in more detail.

Die Vorrichtung zur Herstellung einer Doppelslushhaut besteht aus einer die Außenkontur der Doppelslushhaut bestimmenden Galvanoform 10 und einer die Innenkontur der Doppelslushhaut definierenden Gegenform 14, wobei die Gegenform 14 ein Formstempel oder ein mit der Doppelslushhaut während des Herstellungsprozesses zu verbindender Kunststoffträger ist. An der Außenseite der Galvanoform 10 sind Versteifungen in Form von Rippen 12 angeordnet. Durch die Anordnung der Versteifungen auf der Oberfläche der Außenseite der Galvanoform 10, wird die Biegesteifigkeit und die Stabilität der Galvanoform 10 erhöht. Die auftretenden Druckkräfte beim Einfahren der Gegenform 14 in die Galvanoform 10 sowie die beim Abformprozess der Doppelslushhaut entstehenden Druckkräfte können durch die Galvanoform 10 aufgenommen werden, ohne dass diese sich dabei verformt. Dadurch werden auch Kontur- und Formänderungen an der herzustellenden Doppelslushhaut ausgeschlossen.The device for producing a double slush skin consists of a galvanoform 10 which determines the outer contour of the double slush skin and a counter mold 14 which defines the inner contour of the double slush skin, the counter mold 14 being a shaped stamp or a plastic carrier to be connected to the double slush skin during the production process. On the outside of the electroform 10 , stiffeners in the form of ribs 12 are arranged. By arranging the stiffeners on the surface of the outside of the electroform 10, the bending rigidity and the stability of the electroform 10 is increased. The pressure forces that occur when the counter-mold 14 is moved into the electroform 10 and the pressure forces that arise during the molding process of the double slush skin can be absorbed by the electroform 10 without the latter being deformed. This also excludes changes in contour and shape of the double slush skin to be produced.

Die Anordnung der Versteifungen beziehungsweise der Rippen 12 an der Außenseite der Galvanoform 10 erfolgt in Längs- und/oder Querrichtung. In der Figur ist eine rautenförmige Anordnung der Rippen 12 auf der Außenseite der Galvanoform 10 dargestellt.The stiffening or the ribs 12 are arranged on the outside of the electroform 10 in the longitudinal and / or transverse direction. In the figure, a diamond-shaped arrangement of the ribs 12 on the outside of the electroform 10 is shown.

Die entsprechenden Versteifungen beziehungsweise die Rippen 12 werden beispielsweise durch Laserschweißen oder durch Galvanisierung auf der Außenseite der Galvanoform 10 aufgebracht. The corresponding stiffeners or the ribs 12 are applied, for example, by laser welding or by galvanization to the outside of the electroform 10 .

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

1010th

Galvanoform
Galvanoform

1212th

Rippen
Ribs

1414

Gegenform
Counter form

Claims (6)

1. Vorrichtung zur Herstellung einer Doppelslushhaut mit einer die Außenkontur der Doppelslushhaut bestimmenden Galvanoform und einer die Innenkontur der Doppelslushhaut definierenden Gegenform, dadurch gekennzeichnet, dass an den Außenseiten der Galvanoform (10) Versteifungen angeordnet sind.1. A device for producing a Doppelslushhaut with the outer contour of Doppelslushhaut determining Galvanoform and the inner contour of Doppelslushhaut defining counter-mold, characterized in that (10) stiffeners are arranged on the outer sides of the electroform. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die an der Außenseite der Galvanoform (10) angeordneten Versteifungen Rippen (12) sind.2. Device according to claim 1, characterized in that the stiffeners arranged on the outside of the galvanoform ( 10 ) are ribs ( 12 ). 3. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Rippen (12) an der Außenseite der Galvanoform (10) in Längs- und/oder Querrichtung angeordnet sind.3. Device according to one of the preceding claims, characterized in that the ribs ( 12 ) on the outside of the electroforming ( 10 ) are arranged in the longitudinal and / or transverse direction. 4. Vorrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die Rippen (12) rautenförmig an der Außenseite der Galvanoform (10) angeordnet sind.4. The device according to claim 1 and 2, characterized in that the ribs ( 12 ) are diamond-shaped on the outside of the electroforming ( 10 ) are arranged. 5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Rippen (12) auf die Außenseite der Galvanoform (10) durch Laserschweißen aufgebracht sind.5. Device according to one of the preceding claims, characterized in that the ribs ( 12 ) on the outside of the electroforming ( 10 ) are applied by laser welding. 6. Vorrichtung nach Anspruch 1 bis 4, dadurch gekennzeichnet, dass die Rippen (12) auf die Außenseite der Galvanoform (10) aufgalvanisiert sind.6. The device according to claim 1 to 4, characterized in that the ribs ( 12 ) on the outside of the electroforming ( 10 ) are electroplated.
DE2000122686 2000-04-28 2000-04-28 Twin slush skin molding process for producing vehicle instrument panels, permits variation of process parameters during all molding stages Withdrawn DE10022686A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2000122686 DE10022686A1 (en) 2000-04-28 2000-04-28 Twin slush skin molding process for producing vehicle instrument panels, permits variation of process parameters during all molding stages
EP01250116A EP1149677A3 (en) 2000-04-28 2001-04-03 Method and apparatus for making a two-layer slush skin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2000122686 DE10022686A1 (en) 2000-04-28 2000-04-28 Twin slush skin molding process for producing vehicle instrument panels, permits variation of process parameters during all molding stages

Publications (1)

Publication Number Publication Date
DE10022686A1 true DE10022686A1 (en) 2001-10-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE2000122686 Withdrawn DE10022686A1 (en) 2000-04-28 2000-04-28 Twin slush skin molding process for producing vehicle instrument panels, permits variation of process parameters during all molding stages

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2133186A1 (en) * 2008-06-13 2009-12-16 CLAAS Fertigungstechnik GmbH Tool and method for producing a tool, in particular for manufacturing fibre-reinforced components

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE832934C (en) * 1949-07-02 1952-03-03 Johannes Croning Process for the production of foundry molds and foundry cores
DE19717403A1 (en) * 1997-04-24 1998-10-29 Bosch Gmbh Robert Plastics beaker suitable as yoghurt pot

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE832934C (en) * 1949-07-02 1952-03-03 Johannes Croning Process for the production of foundry molds and foundry cores
DE19717403A1 (en) * 1997-04-24 1998-10-29 Bosch Gmbh Robert Plastics beaker suitable as yoghurt pot

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2133186A1 (en) * 2008-06-13 2009-12-16 CLAAS Fertigungstechnik GmbH Tool and method for producing a tool, in particular for manufacturing fibre-reinforced components

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