WO1987000122A1 - Procede de production de pieces coulees en forme de coquille - Google Patents

Procede de production de pieces coulees en forme de coquille Download PDF

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Publication number
WO1987000122A1
WO1987000122A1 PCT/SE1986/000329 SE8600329W WO8700122A1 WO 1987000122 A1 WO1987000122 A1 WO 1987000122A1 SE 8600329 W SE8600329 W SE 8600329W WO 8700122 A1 WO8700122 A1 WO 8700122A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould
surface layer
detail
lid
moulded
Prior art date
Application number
PCT/SE1986/000329
Other languages
English (en)
Inventor
Roger Nilsson
Göran AHLQVIST
Bengt Karlsson
Original Assignee
Lagomat Ab
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 Lagomat Ab filed Critical Lagomat Ab
Publication of WO1987000122A1 publication Critical patent/WO1987000122A1/fr

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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1671—Making multilayered or multicoloured articles with an insert
    • 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
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/08—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles using several expanding or moulding steps
    • B29C44/083—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another
    • B29C44/086—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another and feeding more material into the enlarged cavity
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1671—Making multilayered or multicoloured articles with an insert
    • B29C2045/1673—Making multilayered or multicoloured articles with an insert injecting the first layer, then feeding the insert, then injecting the second layer

Definitions

  • the present application refers to a method for producing shell-moulded casting structures, particularly interior decorative details for the car industry, such as dashboard panels, door sides and ceiling panels.
  • the structure shall have a low weight at the same time as it has sufficient strength for resisting stresses to which it may be subjected before and after the mounting thereof in its position of use, it shall have shock absorbing properties at the same time as it is rigid enough not to be deformed by temporary forces. It is at the same time a desire that the outside of the detail has. an attractive structure.
  • a plastic sheeting, which shall form the outer casing of the detail is vacuum-formed to the surface shape of the detail.
  • the vacuum-formed sheeting is located with its outer surface downwards in a lower mould part having the same shape as the sheeting.
  • a polyurethane-foam is poured into the mould and the mould is closed by a mould lid.
  • the polyurethane-foam fills all parts of the mould cavity, inter-connects the sheeting and the insert details and acts as a shock absorbing material.
  • the detail is demoulded after thermo-setting, whereupon it is subjected to a punching operation, at which excess sheeting along the edges is removed, at the same time as desired recesses are punched out, e.g. for instruments, glove pocket, etcetera, when it concerns a dashboard panel.
  • the detail finally is subjected to a manual cleaning.
  • the sheeting used is most often an ABS/PVC plastic in which the grain or pattern is pressed directly into the sheeting. In connection to the elongation at the vacuum forming the pattern however will change irregularly due to the fact that the length change, to which the sheeting is subjected in different parts, is dependent on the curvature of the surface.
  • the method also involves a comparatively big material wastage, due to the need for punching out excess material from the detail, which is moulded in one piece without recesees.
  • the purpose of the present invention is to provide a method of the type mentioned above by which the drawbacks and problems described have been eliminated and this has been achieved in a method for producing shell-moulded casting structures, particularly interior decorative details for the car industry, which incorporates the substeps, a) arranging in a mould bottom part a surface layer for the detail, b) mounting any insert details in the mould, c) pouring an expandable, thermo- setting plastic compound before or after fitting of a mould lid, d) causing said plastic compound to fill out the mould cavity formed by the surface layer and said mould lid, e) demoulding the moulded detail after the end of the setting time, and f) thereupon cleaning the detail, and which method is characterized therein that said surface layer is produced in that a surfa.ce layer mould lid is fitted in said bottom mould portion, thus that a closed mould cavity is obtained, that a thermosetting compound intended to form surface layer in the detail is injected into said mould cavity, that the mould is opened after terminated setting and said surface layer mould
  • mould bottom part For production e.g. of a dashboard panel for a vehicle there is first produced a mould bottom part, which has a contour exactly corresponding to a reverse image of the outside of the desired dashboard panel.
  • the surface of the mould bottom part can also be equipped with negative engravings or other negative patterns, which shall give the surface structure or grain of the detail.
  • a surface layer mould lid which together with the mould bottom part forms a mould cavity, into which is then introduced e.g. an elastomer or a somewhat expandable poly-urethane composition, which is allowed to set in the mould cavity.
  • varnish-in-mould-method it is also possible to apply varnish to the outside of the detail by a so called varnish-in-mould-method, by spraying a varnish into the mould bottom part before injection of the plastic compound, which gives a bigger freedom at the choice of colour as compared to conventional methods.
  • the surface layer mould lid is removed after curing, whereby the moulded surface layer is kept in the mould bottom part.
  • plastic compound layers having different properties can possibly be built on the above mentioned surface layer with use of the same method and with use of different mould lids.
  • a final mould lid is mounted and a poly-urethane foam or another suitable material is poured into the mould. This material is brought to fill out the mould cavity formed between the surface layer and the mould lid, whereupon at the following setting it is obtained a bond between the mould compound, the surface layer and any insert details.
  • the mould compound alternatively may be poured before the mould lid is mounted. Also these steps correspond to the conventional method.
  • the mould lid may be designed as an insert detail with attachement flanges etcetera, in which case it of course is bond to the detail produced. Otherwise the mould lid is removed after the setting is ended.
  • the detail is demoulded in common manner, and the detail is also in common manner fine cleaned, whereupon it is ready for use in its intended application.
  • the vacuum-foarming of a sheeting is thus entirely eliminated together with the the problems associated therewith. A bigger freedom is obtained at choice of design.
  • the insert details can be eliminated or at least reduced to number and/or extension due to the possibility to form integrated reinforcements in the surface layer.
  • the invention is not limited to production of instrument panels or other car decorative details but can be used for a number of other applications, and it is neither limited to the above shown example, but can be modified within the scope of the following claims.

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)

Abstract

Procédé de production de structures moulées en forme de coquille, notamment des détails décoratifs internes pour l'industrie automobile, où une couche de surface de l'élément est réalisée dans une partie du fond du moule (1); le procédé consiste à adapter sur le fond du moule (1) un couvercle de moule de couche superficielle (2), à obtenir une qualité de moule fermée (3), et à injecter (4) par la suite dans ladite cavité de moule un composé thermodurcissable, de préférence un élastomère de polyuréthane, destiné à former la couche superficielle (4a, Fig. 2) de l'élément. Le moule est ouvert après l'achèvement de la prise et le couvercle de moule de couche superficielle est enlevé. On exécute ensuite les étapes suivantes, connues en soi: les éventuels détails rapportés (5) sont montés dans le moule (Fig. 2), un composé plastique thermodurcissable et expansible (6) est coulé dans le moule avant ou après l'application d'un couvercle de moule (7), le composé plastique étant amené à remplir la cavité de moule délimitée par la couche superficielle et le couvercle de moule, le détail moulé (8) (Fig. 4) étant démoulé à la fin de la période de prise, et l'élément étant enfin soumis à une opération de nettoyage.
PCT/SE1986/000329 1985-07-10 1986-07-10 Procede de production de pieces coulees en forme de coquille WO1987000122A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8503416-3 1985-07-10
SE8503416A SE8503416D0 (sv) 1985-07-10 1985-07-10 Forfarande for framstelllning av skalformade gjutkonstruktioner

Publications (1)

Publication Number Publication Date
WO1987000122A1 true WO1987000122A1 (fr) 1987-01-15

Family

ID=20360874

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1986/000329 WO1987000122A1 (fr) 1985-07-10 1986-07-10 Procede de production de pieces coulees en forme de coquille

Country Status (2)

Country Link
SE (1) SE8503416D0 (fr)
WO (1) WO1987000122A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5175827A (en) * 1987-01-22 1992-12-29 Nec Corporation Branch history table write control system to prevent looping branch instructions from writing more than once into a branch history table
US5247338A (en) * 1989-04-14 1993-09-21 Caltronis A/S Plant for track-based detection of the wheel profile of train wheels
EP0882561A1 (fr) * 1997-06-06 1998-12-09 Centre D'etudes Et Recherche Pour L'automobile ( Cera) Procédé pour la réalisation d'un panneau insonorisant
WO2001032392A1 (fr) * 1999-10-29 2001-05-10 The Dow Chemical Company Procede de fabrication d'articles en mousse multicouches et produits ainsi obtenus
US6787078B2 (en) 2001-06-15 2004-09-07 Dow Global Technologies Inc. Process for producing a multi-layered foam article and articles produced therefrom
EP1510454A1 (fr) * 2003-08-28 2005-03-02 The Boeing Company Panneau intérieur integré avec isolation et conduits de l'air
WO2009129736A1 (fr) * 2008-04-21 2009-10-29 Kwong Lam Thomas Chow Articles moulés alvéolaires et leur procédé de fabrication
EP4056062A4 (fr) * 2019-11-04 2023-03-01 Mat Product & Technology, SL Procédé de fabrication d'une protection corporelle et protection corporelle ainsi obtenue

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974485C (de) * 1952-01-01 1961-01-12 Hans Guenter Moeller Verfahren zur Herstellung von einseitig offenen Isolierbehaeltern aus Schaumkunststoffen
US3608007A (en) * 1968-08-05 1971-09-21 American Seating Co Method of forming a rigid panel by casting polyurethane in a resin impregnated paper shell
US3649324A (en) * 1969-09-30 1972-03-14 Robertson Co H H Method of making coated panels
DE2262600A1 (de) * 1972-12-21 1974-06-27 Ver Foerderung Inst Kunststoff Verfahren zum herstellen von bauteilen aus schaumkunststoffen in formwerkzeugen
DE2433705A1 (de) * 1973-07-12 1975-05-07 Toyo Tire & Rubber Co Verfahren zur herstellung eines formstuecks aus geschaeumtem kunststoff
US4014966A (en) * 1972-09-06 1977-03-29 Robert Hanning Method for injection molding a composite foamed body having a foamed core and a continuous surface layer
US4544126A (en) * 1984-10-01 1985-10-01 General Motors Corporation Molding apparatus for simultaneously forming a cavity and encapsulating a frame in a foamed body

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974485C (de) * 1952-01-01 1961-01-12 Hans Guenter Moeller Verfahren zur Herstellung von einseitig offenen Isolierbehaeltern aus Schaumkunststoffen
US3608007A (en) * 1968-08-05 1971-09-21 American Seating Co Method of forming a rigid panel by casting polyurethane in a resin impregnated paper shell
US3649324A (en) * 1969-09-30 1972-03-14 Robertson Co H H Method of making coated panels
US4014966A (en) * 1972-09-06 1977-03-29 Robert Hanning Method for injection molding a composite foamed body having a foamed core and a continuous surface layer
DE2262600A1 (de) * 1972-12-21 1974-06-27 Ver Foerderung Inst Kunststoff Verfahren zum herstellen von bauteilen aus schaumkunststoffen in formwerkzeugen
DE2433705A1 (de) * 1973-07-12 1975-05-07 Toyo Tire & Rubber Co Verfahren zur herstellung eines formstuecks aus geschaeumtem kunststoff
US4544126A (en) * 1984-10-01 1985-10-01 General Motors Corporation Molding apparatus for simultaneously forming a cavity and encapsulating a frame in a foamed body

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5175827A (en) * 1987-01-22 1992-12-29 Nec Corporation Branch history table write control system to prevent looping branch instructions from writing more than once into a branch history table
US5247338A (en) * 1989-04-14 1993-09-21 Caltronis A/S Plant for track-based detection of the wheel profile of train wheels
EP0882561A1 (fr) * 1997-06-06 1998-12-09 Centre D'etudes Et Recherche Pour L'automobile ( Cera) Procédé pour la réalisation d'un panneau insonorisant
FR2764229A1 (fr) * 1997-06-06 1998-12-11 Cera Procede pour la realisation d'un panneau insonorisant
WO2001032392A1 (fr) * 1999-10-29 2001-05-10 The Dow Chemical Company Procede de fabrication d'articles en mousse multicouches et produits ainsi obtenus
US6787078B2 (en) 2001-06-15 2004-09-07 Dow Global Technologies Inc. Process for producing a multi-layered foam article and articles produced therefrom
EP1510454A1 (fr) * 2003-08-28 2005-03-02 The Boeing Company Panneau intérieur integré avec isolation et conduits de l'air
WO2009129736A1 (fr) * 2008-04-21 2009-10-29 Kwong Lam Thomas Chow Articles moulés alvéolaires et leur procédé de fabrication
CN102015241A (zh) * 2008-04-21 2011-04-13 周广林 成型泡沫制品及其制造方法
EP4056062A4 (fr) * 2019-11-04 2023-03-01 Mat Product & Technology, SL Procédé de fabrication d'une protection corporelle et protection corporelle ainsi obtenue

Also Published As

Publication number Publication date
SE8503416D0 (sv) 1985-07-10

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