DE4442632B4 - Process for the production of a molded plastic part - Google Patents

Process for the production of a molded plastic part Download PDF

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Publication number
DE4442632B4
DE4442632B4 DE19944442632 DE4442632A DE4442632B4 DE 4442632 B4 DE4442632 B4 DE 4442632B4 DE 19944442632 DE19944442632 DE 19944442632 DE 4442632 A DE4442632 A DE 4442632A DE 4442632 B4 DE4442632 B4 DE 4442632B4
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Germany
Prior art keywords
decorative film
lower mold
production
molded plastic
carrier
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Expired - Fee Related
Application number
DE19944442632
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German (de)
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DE4442632A1 (en
Inventor
Andreas Glasder
Peter Strasser
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Priority to DE19944442632 priority Critical patent/DE4442632B4/en
Publication of DE4442632A1 publication Critical patent/DE4442632A1/en
Application granted granted Critical
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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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • B29C43/183—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles the preformed layer being a lining, e.g. shaped in the mould before compression moulding, or a preformed shell adapted to the shape of the mould
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/78—Moulding material on one side only of the preformed part
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/001—Shaping in several steps
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Verfahren zur Herstellung eines Kunststoff-Formteiles (1) durch Negativthermoformen einer Dekorfolie (1b) im Vakuumverfahren in einer Unterform (3a) und anschließendem Aufbringen eines Trägermaterials, das zwischen dieser Unterform (3a) und einer Oberform (3b) ausgeformt wird, dadurch gekennzeichnet, dass das Trägermaterial (Material für Trägerteil 1a) in die nach dem Thermoformen der Dekorfolie noch offene Unterform (3a) eingebracht und danach formgepresst wird.Process for producing a plastic molded part (1) by negative thermoforming a decorative film (1b) in a vacuum process in a lower mold (3a) and then applying a carrier material which is formed between this lower mold (3a) and an upper mold (3b), characterized in that that the carrier material (material for carrier part 1a) is introduced into the lower mold (3a) which is still open after the thermoforming of the decorative film and is then compression-molded.

Figure 00000001
Figure 00000001

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Kunststoff-Formteiles durch Negativthermoformen einer Dekorfolie im Vakuumverfahren in einer Unterform und anschließendes Aufbringen eines Trägermaterials, das zwischen dieser Unterform und einer Oberform ausgeformt wird.The invention relates to a method for the production of a molded plastic part by negative thermoforming a decorative film in the vacuum process in a lower mold and then applying one Support material that is formed between this lower mold and an upper mold.

Ein derartiges Verfahren beschreibt die EP 247 359 A2 , jedoch wird eine verstärkende Fasermatte verwendet, welche mittels eines Klebemittels mit der Dekorschicht verbunden werden muss, zudem ist nachteiligerweise die Tränkung der Fasermatte mit einer Polymerzusammensetzung notwendig. Auch bei dem mit der DE 31 08 571 C2 bekannt gewordenen Verfahren ist ein Klebstoff erforderlich, der Träger ist in einem separaten Arbeitsgang vorgeformt, so dass auch hier keine kosten- und zeitoptimierte Herstellung möglich ist.Such a method describes the EP 247 359 A2 , however, a reinforcing fiber mat is used, which has to be connected to the decorative layer by means of an adhesive, and additionally the fiber mat is disadvantageously impregnated with a polymer composition. Even with the one with the DE 31 08 571 C2 known method, an adhesive is required, the carrier is preformed in a separate operation, so that cost and time-optimized production is not possible here either.

Bekannt ist ein derartiges Herstellverfahren ferner aus der DE 41 16 437 A1 . Dabei handelt es sich bei dem aus der Unterform, sowie einer Oberform bestehenden Werkzeug um ein Spritzgießwerkzeug, so dass allein schon durch die Verwendung dieses Werkzeuges die Möglichkeiten bezüglich der zum Einsatz kommenden Materialien eingeschränkt sind. Such a manufacturing method is also known from the DE 41 16 437 A1 , The tool consisting of the lower mold and an upper mold is an injection molding tool, so that the use of this tool alone limits the possibilities with regard to the materials used.

Hier Verbesserungen aufzuzeigen, ist Aufgabe der vorliegenden Erfindung.To show improvements here is the object of the present invention.

Das Formpressen ist als solches ebenfalls bekannt, beispielsweise wird hierzu auf die DE 833 118 A verwiesen.The compression molding is also known as such, for example, the DE 833 118 A directed.

Zur Lösung dieser Aufgabe ist vorgesehen, dass das Trägermaterial in die noch offene Unterform eingebracht und danach formgepresst wird.To solve this problem it is provided that the carrier material inserted into the still open lower mold and then compression molded becomes.

Näher erläutert wird die Erfindung anhand eines bevorzugten Ausführungsbeispieles.Closer explained the invention is based on a preferred embodiment.

Dabei ist in den 1 bis 6 schematisch ein Verfahrensablauf zur Herstellung eines Kunststoff-Formteiles dargestellt.It is in the 1 to 6 schematically shown a process flow for the production of a molded plastic part.

Gefertigt werden soll ein in seiner Gesamtheit mit 1 bezeichnetes Kunststoff-Formteil, das aus einem Trägerteil 1a besteht, auf dem eine Dekorfolie 1b aufgebracht ist. Die Dekorfolie soll dabei mit einer narbenartigen Oberflächenstruktur versehen sein.A plastic molding, designated in its entirety by 1, is to be manufactured, which consists of a carrier part 1a exists on which a decorative film 1b is applied. The decorative film should be provided with a scar-like surface structure.

Wie 1 zeigt, wird zunächst die Dekorfolie 1b in einer Aufheizstation, die aus einer Oberheizung 2a sowie einer Unterheizung 2b besteht, erwärmt. Dabei kann es sich bei der Dekorfolie 1b entweder um eine Kompaktfolie oder um eine Schaumfolie handeln.How 1 shows, the decorative film is first 1b in a heating station that consists of an upper heater 2a as well as an underheater 2b, heated. It can be the case with the decorative film 1b either a compact film or a foam film.

Gemäß 2 wird anschließend die Dekorfolie 1b auf eine Unterform 3a aufgelegt, aus der die gewünschte Oberflächenform des Formteiles 1a negativ herausgearbeitet ist. Bei dieser Unterform 3a handelt es sich um eine poröse Galvanoschale, die mit einer Heizung versehen ist und zusätzlich eine Vakuumeinrichtung enthält, mit Hilfe derer die Dekorfolie 1b an die Negativform der Unterform 3a angelegt wird, wie dies 3 zeigt. In diesem Verfahrensschritt erfolgt somit das Formen der Dekorfolie 1b im sog. Vakuumverfahren unter gleichzeitiger Wärmezufuhr zum Material der Dekorfolie 1b. In diese Verfahrensschritt kann gleichzeitig eine insbesondere narbenartige Oberflächenstruktur in die Dekorfolie 1b eingeprägt werden. Auch dies erfolgt unter Einwirkung der Heizung sowie das Vakuums auf die Dekorfolie 1b.According to 2 then the decorative film 1b on a sub mold 3a placed from which the desired surface shape of the molded part 1a is worked out negatively. With this subform 3a it is a porous electroplating bowl, which is provided with a heater and additionally contains a vacuum device, with the help of which the decorative film 1b to the negative form of the subform 3a is laid out like this 3 shows. The decorative film is thus shaped in this process step 1b in the so-called vacuum process with simultaneous supply of heat to the material of the decorative film 1b , In this process step, a scar-like surface structure in particular can be simultaneously in the decorative film 1b be impressed. This also takes place under the influence of the heating and the vacuum on the decorative film 1b ,

Auf die nun so vorgeformte Dekorfolie 1b soll in den nächsten Verfahrensschritten nun das Trägerteil 1a aufgebracht werden. Hierzu wird – wie 4 zeigt – in die Unterform 3a auf die Dekorfolie 1b das Material für das Trägerteil 1a aufgebracht, das in dieser Figur der Einfachheit halber ebenfalls mit 1a bezeichnet ist. Dieses Material kann dabei relativ unstrukturiert aufgetragen werden; zum Auftragen vorgesehen sein kann eine geeignete Spritzeinheit.On the now pre-shaped decorative film 1b the carrier part should now be used in the next process steps 1a be applied. For this - how 4 shows - in the lower mold 3a on the decorative film 1b the material for the carrier part 1a applied, also in this figure for the sake of simplicity 1a is designated. This material can be applied relatively unstructured; A suitable injection unit can be provided for application.

Schließlich wird – wie 5 zeigt – auf die Unterform 3a eine entsprechende Oberform 3b abgesenkt, derart, dass das sich zwischen der Unterform 3a bzw. der Dekorfolie 1b und der Oberform 3b befindende Trägermaterial durch Formpressen zum Trägerteil 1a geformt wird. Nach anschließendem Abkühlen und Aushärten des Kunststoff-Formteiles 1 kann dieses – wie 6 darstellt – als fertiggeformt entnommen werden.Finally - how 5 points - to the lower mold 3a a corresponding top shape 3b lowered in such a way that it is between the lower mold 3a or the decorative film 1b and the top shape 3b existing carrier material by compression molding to the carrier part 1a is formed. After the cooling and curing of the molded plastic part 1 can this - how 6 represents - can be removed as fully formed.

Das beschriebene Herstellverfahren ist insofern vorteilhaft, als dass das Vorformen der Dekorfolie 1b sowie das Versehen dieser Folie mit einem Trägerteil in nur einem einzigen Werkzeug, nämlich der Unterform 3a sowie der Oberform 3b durchgeführt werden kann. Aufwändige Ortswechsel zwischen verschiedenen Werkzeugen werden hierdurch vermieden. Neben diesem im wesentlichen aus der Unterform 3a sowie der Oberform 3b bestehenden Werkzeug wird lediglich die Aufheizstation sowie eine nicht gezeigte Spritzeinheit zum Einbringen des Trägermaterials benötigt. Der formgebende Abschnitt der Unterform 3a ist dabei bevorzugt porös ausgebildet, um das Vakuumverfahren effektiv durchführen zu können. Somit kann quasi in einem einzigen Arbeitsschritt das beschriebene Kunststoff-Formteil 1 hergestellt werden, was nicht nur den Zeit- sowie den Arbeitsflächenaufwand geringhält, sondern zu weiteren Kostenersparnissen führt.The manufacturing method described is advantageous in that the preforming of the decorative film 1b and the provision of this film with a carrier part in only one tool, namely the lower mold 3a as well as the upper form 3b can be carried out. This avoids time-consuming changes of location between different tools. In addition to this essentially from the lower mold 3a as well as the upper form 3b existing tool, only the heating station and an injection unit, not shown, are required for introducing the carrier material. The shaping section of the lower mold 3a is preferably porous in order to be able to carry out the vacuum process effectively. The plastic molded part described can thus be produced in a single work step 1 be produced, which not only keeps the time and the work space low, but also leads to further cost savings.

Claims (2)

Verfahren zur Herstellung eines Kunststoff-Formteiles (1) durch Negativthermoformen einer Dekorfolie (1b) im Vakuumverfahren in einer Unterform (3a) und anschließendem Aufbringen eines Trägermaterials, das zwischen dieser Unterform (3a) und einer Oberform (3b) ausgeformt wird, dadurch gekennzeichnet, dass das Trägermaterial (Material für Trägerteil 1a) in die nach dem Thermoformen der Dekorfolie noch offene Unterform (3a) eingebracht und danach formgepresst wird.Process for the production of a molded plastic part ( 1 ) by negative thermoforming a decorative film ( 1b ) in a vacuum in a sub-mold ( 3a ) and then applying a carrier material between this subform ( 3a ) and an upper form ( 3b ) is formed, thereby characterized in that the carrier material (material for carrier part 1a ) into the lower mold that is still open after thermoforming the decorative film ( 3a ) is introduced and then pressed. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Dekorfolie (1b) durch die Unterform (3a) mit einer insbesondere narbenartigen Oberflächenstruktur versehen wird.A method according to claim 1, characterized in that the decorative film ( 1b ) through the lower form ( 3a ) is provided with a scar-like surface structure in particular.
DE19944442632 1994-11-30 1994-11-30 Process for the production of a molded plastic part Expired - Fee Related DE4442632B4 (en)

Priority Applications (1)

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DE4442632B4 true DE4442632B4 (en) 2004-05-06

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2184149A1 (en) * 2008-11-05 2010-05-12 Peguform GmbH Method and device for producing a moulded part with a decorative surface

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE833118C (en) * 1950-12-31 1952-03-03 Otto Zollfrank Process for the production of molded articles made of thermoplastic materials with a similar film cover
DE3108571C2 (en) * 1981-03-06 1985-08-29 Paul Kiefel Gmbh, 8228 Freilassing Method for producing a composite body consisting of a carrier and a cover layer arranged on the carrier, as well as a device for carrying out the method
EP0247359A2 (en) * 1986-04-25 1987-12-02 Inoac Corporation Interior material for vehicles and method for its manufacture
DE4116437A1 (en) * 1990-05-25 1991-11-28 Volkswagen Ag Mfr. of coloured plastic components - comprises forming coloured film in vacuum in one half of mould which is closed to form injection mould

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE833118C (en) * 1950-12-31 1952-03-03 Otto Zollfrank Process for the production of molded articles made of thermoplastic materials with a similar film cover
DE3108571C2 (en) * 1981-03-06 1985-08-29 Paul Kiefel Gmbh, 8228 Freilassing Method for producing a composite body consisting of a carrier and a cover layer arranged on the carrier, as well as a device for carrying out the method
EP0247359A2 (en) * 1986-04-25 1987-12-02 Inoac Corporation Interior material for vehicles and method for its manufacture
DE4116437A1 (en) * 1990-05-25 1991-11-28 Volkswagen Ag Mfr. of coloured plastic components - comprises forming coloured film in vacuum in one half of mould which is closed to form injection mould

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