WO1990003256A1 - Procede et dispositif servant a produire des produits rigides avec un grand finissage de la surface, tels que notamment des produits moules en plastique - Google Patents

Procede et dispositif servant a produire des produits rigides avec un grand finissage de la surface, tels que notamment des produits moules en plastique Download PDF

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Publication number
WO1990003256A1
WO1990003256A1 PCT/SE1989/000451 SE8900451W WO9003256A1 WO 1990003256 A1 WO1990003256 A1 WO 1990003256A1 SE 8900451 W SE8900451 W SE 8900451W WO 9003256 A1 WO9003256 A1 WO 9003256A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
moulding
sheet material
compression
mould
Prior art date
Application number
PCT/SE1989/000451
Other languages
English (en)
Inventor
Axel Kaufmann
Original Assignee
Molybon Agenturer Aktiebolag
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 Molybon Agenturer Aktiebolag filed Critical Molybon Agenturer Aktiebolag
Publication of WO1990003256A1 publication Critical patent/WO1990003256A1/fr

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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
    • 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
    • B29C51/16—Lining or labelling
    • 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
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0022—Bright, glossy or shiny surface

Definitions

  • the present invention relates to a method for producing in one step such rigid products as vehicle body parts, mouldings for liner panels in vehicles, especially- plastic mouldings, and similar articles comprising a layer of a thermoformed fibre-reinforced backing material and, on at least one side thereof, an outer layer of a thermo ⁇ formed flexible film or foil material with high surface, finish on the surface facing away from the backing material, the two materials being preheated and thereafter brought together and adhered to one another to form said product.
  • the invention also relates to a device for producing such products.
  • the comparatively inexpensive GMT material usually has the form of relatively rigid plates which, before the moulding, are heated to about 200° and then compression moulded in a hydraulic press, the work cycle times for the compression being about 20-60 s, depending on the desired thickness of the product.
  • the fibre reinforcement of these backing materials produces visible irregularities in the surface of the moulded product whose surface finish will be unacceptable. Complementary work, such as the application of a primer, patching, sanding, and lacque ⁇ ring, is therefore necessary. It is not uncommon that a so-called activating primer is applied to the backing material, a soft foil sheet being thereafter applied to said primer in order to produce the desired final finish. In that case, the backing material always has to be pre- moulded.
  • SMC material Sheet Moulding Compound
  • SMC products are also compression moulded and have to be worked after shaping in order to obtain a high surface finish.
  • SMC material for producing the products in question is described in, for example, US-A-4,612,149. What these two backing materials and the methods used for producing products based on said materials have in common, is that a number of different operations have to be carried out in different steps, including e.g.
  • these two backing materials are moulded by means of compression moulding in a press with two mould halves. After preheating, the materials are positioned in the cavity of the female mould, whereupon the male mould is slammed down into the cavity to effect the compression moulding. Then, the male mould is retracted and the moulded product is removed from the female mould, for instance by means of an ejector.
  • the glass fibre content of the backing material gives the product an unattractive surface which has to be worked to a high surface finish.
  • One object of the present invention is to provide a method for producing such rigid products as mentioned above which comprise a fibre-reinforced backing material, but which nevertheless have a high surface finish, type class A.
  • Another object of the invention is that the produc ⁇ tion should comprise only one step of operation with far shorter total work cycle times than possible thus far.
  • a further object of the invention is that the pro ⁇ duction should be carried out wholly without solvents.
  • the invention aims at providing a device for producing rigid products of the above-mentioned type in one step of operation using uncomplicated equipment.
  • the invention therefore provides a method and a device in which compression moulding and vacuum moulding have been combined to manufacture products with a fibre- reinforced backing material for which a film or foil sheet material has been applied which has a high surface finish.
  • the method provided is of the type described by way of introduction and is characterised in that the film or foil sheet material is fed into a female mould with a cavity and is sucked against the walls of said cavity for moulding of its surface finish side in contact with said walls; that the backing material, at the same time or shortly thereafter, is fed into the female mould and positioned on top of the said sheet material; that a male mould is subsequently inserted in the cavity of the female mould so that said backing material and said sheet material are compression moulded and given their final shape; and that the male mould is finally retracted from the female mould and the finished product is removed therefrom to cool.
  • a device for producing in one step such rigid products as vehicle body parts, mouldings for liner panels in vehicles, especially plastic mouldings, and similar articles comprising a layer of a thermoformed, fibre- reinforced backing material and, on at least one side thereof, an outer layer of a thermoformed, flexible film or foil sheet material with high surface finish on the side facing away from the backing material, said device comprising means for preheating said sheet material and said backing material, respectively, and means for feeding said sheet material and said backing material into .a means for shaping and compression moulding of the two materials to form said product.
  • the moulding and compression means comprises a female mould with a cavity into which a male mould can be moved for compression moulding and shaping, the male mould having a shape which substantially coresponds to the shape of the cavity; and that the female mould comprises conduits opening into the cavity and connected to a vacuum source for sucking and moulding said sheet material against the walls of the cavity before activation of the male mould for compression moulding of the two materials within said cavity.
  • a moulding and compression means is generally designated 1 and comprises a stationary female mould 2 with a cavity 3, and a male mould in the form of a vertically movable plunger 4, the shape of which corre ⁇ sponds to the shape of the cavity 3. Both the plunger and the cavity have satisfactory surface smoothness.
  • the sheet 6 which is preferably about 0.15-0.40 mm thick, is fed by means of a roller gear 7 into the mould ⁇ ing and compression means 1 via a preheating oven 8 with a temperature of about 190°C.
  • the feeding may also be carried out manually or by other mechanical means.
  • the plates 10 are comparatively rigid and preferably have a thickness of about 3-4 mm. They consist of a thermoformed glass fibre- reinforced material which in this embodiment is made up of GMT as referred to in the introduction.
  • the device is intended for the production of such rigid plastic products as vehicle body parts, mouldings for liner panels in vehicles, and similar articles.
  • the end product should comprise a layer of a backing material, i.e. compression moulded GMT plates 10, and a film or foil sheet layer 6 applied and adhered thereto, said sheet layer, after shaping and compression moulding, having a class A finish on the surface facing away from the backing material.
  • the production according to the invention of plastic products is carried out as follows.
  • the plastic sheet 6 is heated in the preheating oven 8 and fed into the moulding and compression means 1 by means of the roll gear 7 and, optionally, further feeding means ( ot shown).
  • the feeding is such that the sheet 6 is positioned over the cavity to cover it (dash-dot line), whereupon a clamping frame 12 is applied against the upper side of the female mould 2 so that the sheet 6 is fixed round the cavity 3.
  • the clamping frame 12 is positioned circumferentially round and somewhat outside the cavity 3.
  • a vacuum pump 13 is activated to give a suction effect via the vacuum conduits 14 disposed in the female mould 2 and opening into the cavity 3.
  • the sheet 6 is pulled down and firmly sucked against the walls 15 of the cavity 3, the finish side of the sheet facing the cavity walls.
  • only two vacuum conduits 14 are shown, but anyone skilled in the art realises that there has to be a number of such conduits to exert a sufficient suction effect on the sheet 6.
  • the backing material i.e. the- GMT plates 10, which has been heated in the preheating oven 9
  • the plunger 4 is slammed down into the cavity 3 and the hot GMT plates 10 and the hot sheet 6 are pressed together so that the product is given the shape defined by the shapes of the cavity 3 and the plunger 4.
  • the plunger 4 comprises venting ducts 16 through which the air in the cavity 3 is evacuated when the plunger 4 is slammed down.
  • the plunger 4 is retracted from the cavity 3, whereupon the clamping frame 12 is removed from the female mould 2.
  • the vacuum pump 13 is switched off and the finished product is removed manually or by means of a pick-up robot or the like (not shown) from the cavity 3.
  • the product is taken to a suitable place for cooling.
  • a new sheet 6 is advanced to cover the cavity 3, and the procedure is repeated.
  • the plunger 4 and the female mould 2 are preferably provided with cooling ducts 17 and 18, respectively, in which a cooling agent is circulated to impart to these two main components of the moulding and compression means 1 a temperature clearly below the above-mentioned preheating temperatures, preferably about 20-40°C. Furthermore, the plunger 4 preferably is provided with means 19 for punch ⁇ ing out a desired portion of the sheet 6 when the plunger 4 is slammed down into the cavity 3.
  • the invention can be said to reside in a combination of compression moulding and vacuum moulding in one step and in one and the same machine. Therefore, it is possible to obtain very short, total work cycle times, while maintaining a satisfactory quality of the end product, as well as a high surface finish. Practical tests using GMT as a backing material have shown that total work cycle times of but 40-60 s can be obtained. This should be compared with prior art methods comprising several steps of operation, e.g. preforming, intermediate storage, compression moulding, application of a primer, patching and sanding etc, with total work cycle times ranging up to a few minutes. Thus, considerable savings in time and money are achieved by means of the present invention. It should also be pointed out that the invention by no means is restricted to the embodiment described above, and that several modifications of the invention are conceivable within the scope of the inventive idea as defined in the appended claims.
  • the invention can be applied to other materials than those mentioned by way of example in this description.
  • Many other plastic materials can serve as backing material or sheet material, and if desired, sheet material can be applied to both sides of the backing material.
  • a nonplastic sheet material e.g. a knitted fabric material.
  • the main object is not to obtain a high surface finish, but to produce a rigid product in one step and without the use of solvents.
  • the peripheral equipment employed i.e.
  • the preheating ovens, the feeding means etc may be of a different type.
  • the feeding of the GMT plates may, in some cases, be carried out manually and, moreover, the removal of the end product from the cavity may be carried out by means of a further pick-up robot (not shown).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

Dans le procédé décrit, qui sert à produire des produits en plastique rigide comprenant un matériau de base (10) renforcé par des fibres et thermoformés et une couche externe d'un matériau en film ou en feuille flexible thermoformé (6), les deux matériaux sont préchauffés et ensuite amenés ensemble dans un outil de compression et de moulage (1), où ils sont moulés par compression et reçoivent leur forme finale. Le procédé s'effectue en une seule étape avec des périodes de cycle de travail comprises entre environ 40 et 60 s. Le produit final présente un très grand finissage de la surface et aucun travail complémentaire n'est nécessaire. En outre, aucun solvant n'est requis. Un dispositif de réalisation dudit procédé comprend, en plus de l'outil de compression et de moulage mentionné ci-dessus, des organes d'acheminement (5, 7) et un four de préchauffage (8) pour le film ou la feuille (6), ainsi qu'un organe d'acheminement (11) et un four de préchauffage (9) pour le matériau de base (10). Dans l'outil de moulage et de compression (1), le moulage sous vide et le moulage par compression sont combinés en une opération effectuée en une seule étape.
PCT/SE1989/000451 1988-09-20 1989-08-29 Procede et dispositif servant a produire des produits rigides avec un grand finissage de la surface, tels que notamment des produits moules en plastique WO1990003256A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8803322A SE463548B (sv) 1988-09-20 1988-09-20 Foerfarande foer framstaellning av styva produkter med hoegklassig ytfinish, saerskilt formgods av plast
SE8803322-0 1988-09-20

Publications (1)

Publication Number Publication Date
WO1990003256A1 true WO1990003256A1 (fr) 1990-04-05

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992012850A1 (fr) * 1991-01-24 1992-08-06 Dsm N.V. Procede de formation d'un corps stratifie
EP0509371A2 (fr) * 1991-04-08 1992-10-21 Sumitomo Chemical Company, Limited Procédé pour la fabrication d'un objet moulé multicouche
WO1993011927A1 (fr) * 1991-12-13 1993-06-24 Konrad Hornschuch Ag Panneau en matieres thermoplastiques pour l'habillage interieur de vehicules a moteur et son procede de fabrication
EP0816051A2 (fr) * 1996-06-26 1998-01-07 Paul Kiefel Gmbh Procédé de laminage et dispositif pour sa mise en oeuvre
DE19959654A1 (de) * 1999-12-10 2001-06-21 Findlay Ind Deutschland Gmbh Verfahren zur Herstellung von Innenausstattungskomponenten von Kraftfahrzeugen
WO2005009721A1 (fr) 2003-07-22 2005-02-03 Findlay Industries Deutschland Gmbh Elements de garniture interieure pour vehicules automobiles presentant un profil de surface defini
WO2005063478A1 (fr) * 2003-12-23 2005-07-14 Intier Automotive Inc. Article stratifie et son procede de fabrication
WO2006122919A1 (fr) 2005-05-20 2006-11-23 Polytec Interior Gmbh Procede pour realiser des elements d'amenagement interieur presentant un profil de surface et/ou de couleur defini respectivement, et objets ainsi obtenus
DE102005045794A1 (de) * 2005-09-24 2007-04-05 Audi Ag Verfahren und Vorrichtung zur Herstellung einer mehrschichtigen Unterbodenverkleidung für Kraftfahrzeuge

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE468977B (sv) * 1991-08-19 1993-04-26 Volvo Ab Foerfarande foer framstaellning av pressformade skivformiga material.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492392A (en) * 1967-04-21 1970-01-27 Fuji Jyu Kogyo Kk Method of molding reinforced plastics
US4052241A (en) * 1975-11-13 1977-10-04 Detroit Gasket And Manufacturing Company Method of forming a contoured laminate
US4123488A (en) * 1977-09-06 1978-10-31 Lawson David E Molded plastic article and method of making the same
EP0084135A2 (fr) * 1982-01-16 1983-07-27 BASF Aktiengesellschaft Procédé pour la fabrication de corps moulés à partir d'un laminé renforcé
EP0088584A2 (fr) * 1982-03-09 1983-09-14 The Wiggins Teape Group Limited Procédé de fabrication d'une matière thermoplastique moulée ou moulable renforcée de fibres
DE3222939C2 (de) * 1981-06-22 1986-12-11 Pier Luigi Como Nava Verfahren zum Herstellen von Schutzhelmen aus mit einer Verstärkung versehenem Harz, und Spritzform zur Durchführung des Verfahrens
DE3536272A1 (de) * 1985-10-11 1987-04-16 Messerschmitt Boelkow Blohm Verfahren zum herstellen eines faserverbundlaminat-formteils

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492392A (en) * 1967-04-21 1970-01-27 Fuji Jyu Kogyo Kk Method of molding reinforced plastics
US4052241A (en) * 1975-11-13 1977-10-04 Detroit Gasket And Manufacturing Company Method of forming a contoured laminate
US4123488A (en) * 1977-09-06 1978-10-31 Lawson David E Molded plastic article and method of making the same
DE3222939C2 (de) * 1981-06-22 1986-12-11 Pier Luigi Como Nava Verfahren zum Herstellen von Schutzhelmen aus mit einer Verstärkung versehenem Harz, und Spritzform zur Durchführung des Verfahrens
EP0084135A2 (fr) * 1982-01-16 1983-07-27 BASF Aktiengesellschaft Procédé pour la fabrication de corps moulés à partir d'un laminé renforcé
EP0088584A2 (fr) * 1982-03-09 1983-09-14 The Wiggins Teape Group Limited Procédé de fabrication d'une matière thermoplastique moulée ou moulable renforcée de fibres
DE3536272A1 (de) * 1985-10-11 1987-04-16 Messerschmitt Boelkow Blohm Verfahren zum herstellen eines faserverbundlaminat-formteils

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992012850A1 (fr) * 1991-01-24 1992-08-06 Dsm N.V. Procede de formation d'un corps stratifie
US6280678B1 (en) 1991-04-08 2001-08-28 Sumitomo Chemical Company Limited Process for producing multilayer molded article
EP0509371A2 (fr) * 1991-04-08 1992-10-21 Sumitomo Chemical Company, Limited Procédé pour la fabrication d'un objet moulé multicouche
EP0509371A3 (en) * 1991-04-08 1992-11-04 Sumitomo Chemical Company, Limited Process for producing multilayer molded article
WO1993011927A1 (fr) * 1991-12-13 1993-06-24 Konrad Hornschuch Ag Panneau en matieres thermoplastiques pour l'habillage interieur de vehicules a moteur et son procede de fabrication
EP0816051A2 (fr) * 1996-06-26 1998-01-07 Paul Kiefel Gmbh Procédé de laminage et dispositif pour sa mise en oeuvre
EP0816051A3 (fr) * 1996-06-26 1998-05-20 Paul Kiefel Gmbh Procédé de laminage et dispositif pour sa mise en oeuvre
DE19959654A1 (de) * 1999-12-10 2001-06-21 Findlay Ind Deutschland Gmbh Verfahren zur Herstellung von Innenausstattungskomponenten von Kraftfahrzeugen
WO2005009721A1 (fr) 2003-07-22 2005-02-03 Findlay Industries Deutschland Gmbh Elements de garniture interieure pour vehicules automobiles presentant un profil de surface defini
WO2005063478A1 (fr) * 2003-12-23 2005-07-14 Intier Automotive Inc. Article stratifie et son procede de fabrication
WO2006122919A1 (fr) 2005-05-20 2006-11-23 Polytec Interior Gmbh Procede pour realiser des elements d'amenagement interieur presentant un profil de surface et/ou de couleur defini respectivement, et objets ainsi obtenus
DE102005023945A1 (de) * 2005-05-20 2006-12-07 Polytec Interior Gmbh Mehrfarbige Innenausstattungskomponenten
EP2279915A2 (fr) 2005-05-20 2011-02-02 Polytec Automotive GmbH & Co. KG Composants d'équipement intérieur à plusieurs couleurs
US8291593B2 (en) 2005-05-20 2012-10-23 Boshoku Automotive Europe Gmbh Method of manufacturing multicolored interior trim components
DE102005045794A1 (de) * 2005-09-24 2007-04-05 Audi Ag Verfahren und Vorrichtung zur Herstellung einer mehrschichtigen Unterbodenverkleidung für Kraftfahrzeuge

Also Published As

Publication number Publication date
SE463548B (sv) 1990-12-10
SE8803322L (sv) 1990-03-21
SE8803322D0 (sv) 1988-09-20

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