WO2008060215A1 - Moule et procédé de fabrication de panneaux intérieurs par technique de moulage par injection - Google Patents

Moule et procédé de fabrication de panneaux intérieurs par technique de moulage par injection Download PDF

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Publication number
WO2008060215A1
WO2008060215A1 PCT/SE2007/000982 SE2007000982W WO2008060215A1 WO 2008060215 A1 WO2008060215 A1 WO 2008060215A1 SE 2007000982 W SE2007000982 W SE 2007000982W WO 2008060215 A1 WO2008060215 A1 WO 2008060215A1
Authority
WO
WIPO (PCT)
Prior art keywords
panel
mold
thermoplastic material
cavity
insert
Prior art date
Application number
PCT/SE2007/000982
Other languages
English (en)
Inventor
Henry Jansson
Oivind Nilsrud
Mats Gustafsson
Osman Koca
Original Assignee
International Automotive Components Group 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 International Automotive Components Group Ab filed Critical International Automotive Components Group Ab
Publication of WO2008060215A1 publication Critical patent/WO2008060215A1/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in 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
    • 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
    • B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings

Definitions

  • the present invention relates to a process for the manufacturing of interior panels and parts of a vehicle.
  • Interior fitting parts and panels in vehicles are designed to, in different ways, serve as shock absorbers during collisions and thereby decrease the injuries on passengers in the vehicle.
  • Inner panels in vehicles are also designed to improve the acoustic environment in the vehicle as well as being aesthetically pleasing. The latter implies pleasing to all senses, not only to eye and ear, but also tactile.
  • EP 1 275 540 shows the complexity of the inner door panel and the amount of different parts that are needed to achieve the desired end product.
  • the invention relates to a process for the manufacturing of interior panels by utilizing injection molding and a mold having a mold cavity.
  • the panels comprises a carrying structure of thermoplastic material and a panel insert covering a portion of a front surface of said panel.
  • the invention is characterized in that the process comprises the following steps;
  • a precut sheet of the panel insert is arranged in a predetermined portion of a mold.
  • the mold is then closed and the panel insert is fixed to a front face of the mold by means of fixing pins.
  • the mold cavity is also parted into an insert cavity, arranged on the rear side of said panel insert, and a main structure cavity by means of a sealing slider.
  • a first portion of molten thermoplastic material is distributed utilizing a low pressure in the insert cavity whereupon said first portion of thermoplastic material is allowed to solidify somewhat.
  • the sealing slider is then retracted after which a second amount of molten thermoplastic material is injected into the main structure cavity utilizing a high pressure. The second amount of molten thermoplastic material is allowed to merge with said first amount of thermoplastic material so that a unit is formed.
  • the injected thermoplastic material is allowed to cool and solidify so that the mold can be opened, the interior panel be removed from the mold and the process may be repeated.
  • the low pressure molding will not be able to reproduce any distinct details like narrow reinforcing ribs, lattice work, surface structure and mounting portions needed during the final assembly.
  • the solidified, low pressure injected thermoplastic material will, however, act as a barrier during the high pressure molding phase of the process.
  • the high pressure injection phase will be able to reproduce the distinct details listed above.
  • a high pressure injection molding would cause the thermoplastic material to bleed through a permeable material of the panel insert. For matters of comfort and design it is very often a desire to include materials that by nature are permeable as panel inserts on interior panels in vehicles. Such panel inserts are by the man skilled in the art also known as trimming.
  • low pressure refers to methods of distributing the thermoplastic in the mold where great care is taken not to cause the thermoplastic material to either leak through the panel insert or the edges of the panel insert and the mold as well as making sure that the material of the panel insert isn't creased, displaced, compressed beyond a desired level or affecting its surface properties in an undesired way.
  • This method may comprise applying a preheated extruded sheet or slab of thermoplastic material in the insert cavity calculated to fill the same whereupon the mold is carefully closed thereby distributing the thermoplastic material. It is also possible to utilize the method of injecting the thermoplastic material though one or more traditional injection gates, but at a low pressure. For bigger an more sensitive details, like when the insert panel material is easily creased or compressed, one may use sequential filling through a number of injection gates.
  • the panel insert is made of a material selected from the group consisting of; woven fabric, non-woven fabric, fleece, needle-loom, open-cell polymeric foam, closed-cell polymeric foam, fiber mat and combinations thereof. It is also possible to use materials like different types of leather as well as synthetic reproductions thereof. These materials as well as previously mentioned materials may be provided with a so called backing of for example polymeric foam in order to achieve the desired tactile properties.
  • An interior panel manufactured according to the herein described process suitable forms an item selected from the group consisting of; an interior door panel, an instrument panel, an interior side wall panel, an interior ceiling panel, a luggage compartment panel, an interior tail gate panel, a floor panel and combinations thereof.
  • Such panels are most suitably used in vehicles like cars, trucks and busses but may also be used in maritime vehicles, helicopters and airplanes, wherever the need occurs.
  • the pressure in the insert cavity is preferably less than 20% during the injection of the first portion of thermoplastic material than the pressure in the main structure cavity during the injection of the second portion of thermoplastic material.
  • the invention also relates to a mold for the manufacturing of interior panels by utilizing injection molding.
  • the mold is provided with a mold cavity, a front face for receiving a precut sheet of a panel insert, fixing pins for fixing of the panel insert to the front face.
  • the mold is further provided with a sealing slider for parting of the mold cavity into an insert cavity, arranged on the rear side of the panel insert, and a main structure cavity.
  • the mold is also provided with at least one means for arranging a first amount of molten thermoplastic material distributed at a low pressure into said insert cavity and at least one injection gate for injecting a second amount of molten thermoplastic material at a high pressure into said main structure cavity.
  • the mold is further provided with means for opening and closing said sealing slider during the molding procedure.
  • the first amount of thermoplastic material in the insert cavity is preferably introduced through means of at least one injection gate through which the first amount of thermoplastic is injected at a low pressure.
  • Figure Ia - Ie shows in sequence different steps of the process according to an embodiment of the invention. Accordingly, figure Ia - e shows schematically, portions of a mold 10 for the manufacturing of interior panels 1 by utilizing injection molding.
  • the mold 10 is provided with a mold cavity 20, a front face 12 for receiving a precut sheet of a panel insert 3 and fixing pins 13 for fixing of the panel insert 3 to the front face 12.
  • the mold 10 is also provided with a sealing slider 14 for parting of said mold cavity 20 into an insert cavity 23, arranged on the rear side of said panel insert 3 , and a main structure cavity 21.
  • the mold 10 further includes at least one injection gate 23 !
  • the mold 10 further comprises means for opening and closing said sealing slider 14 during the molding procedure.
  • the process comprises starts by arranging a precut sheet of the panel insert 3 of a permeable material in a predetermined portion of a mold 11 (see figure I a).
  • the mold 10 is then closed (see figure Ib) and the panel insert 3 is fixed to a front face 12 of the mold 10 by means of fixing pins 13.
  • the mold cavity 20 is also parted into an insert cavity 23, arranged on the rear side of said panel insert 3, and a main structure cavity 21 by means of a sealing slider 14.
  • a first portion of molten thermoplastic material is then injected at a low pressure into the insert cavity 23 whereupon said first portion of thermoplastic material is allowed to solidify somewhat.
  • the sealing slider 14 is then retracted after which a second amount of molten thermoplastic material is injected into the main structure cavity 21 utilizing a high pressure.
  • the second amount of molten thermoplastic material is allowed to merge with said first amount of thermoplastic material so that a unit is formed.
  • the injected thermoplastic material is then allowed to cool and solidify so that the mold 10 can be opened, as best viewed in figure I e, whereupon the interior panel 1 can be removed from the mold and the process may be repeated.
  • the low pressure molding will not be able to reproduce any distinct details like narrow reinforcing ribs, lattice work, surface structure and mounting portions needed during the final assembly.
  • the solidified, low pressure injected thermoplastic material will, however, act as a barrier during the high pressure molding phase of the process.
  • the high pressure injection phase will be able to reproduce the distinct details listed above.
  • a high pressure injection molding would cause the thermoplastic material to bleed through a permeable material of the panel insert.
  • the panel insert is made of a material such as woven fabric, non-woven fabric, fleece, needle-loom, open-cell polymeric foam, closed-cell polymeric foam, fiber mat, leather and combinations thereof.
  • An interior panel manufactured according to the herein described process suitable forms an item selected from the group consisting of; an interior door panel, an instrument panel, an interior side wall panel, an interior ceiling panel, a luggage compartment panel, an interior tail gate panel, a floor panel and combinations thereof.
  • Such panels are most suitably used in vehicles like cars, trucks and busses but may also be used in maritime vehicles, helicopters and airplanes, wherever the need occurs.

Landscapes

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

Abstract

La présente invention concerne un procédé de fabrication de panneaux intérieurs (1) par technique de moulage par injection ainsi qu'un moule (10) à cavité (20). Les panneaux (1) comprennent une structure porteuse (2) en matériau thermoplastique ainsi qu'une pièce d'insertion de panneau (3) couvrant une portion de la surface avant dudit panneau (1). Le procédé comprend les étapes de disposition d'une plaque prédécoupée de la pièce d'insertion de panneau (3) dans une portion de moule prédéterminée (11). Le moule (10) est ensuite fermé et la pièce d'insertion de panneau (3) est fixée sur une face avant (12) du moule (10) au moyen de taquets de fixation (13). La cavité du moule (20) est ensuite divisée en une cavité d'insertion (23), positionnée au niveau de la partie arrière de ladite pièce d'insertion de panneau (3), et une cavité de structure principale (21) au moyen d'un coulisseau de fermeture (14). Une première portion de matériau thermoplastique à l'état fondu est distribuée à faible pression dans la cavité d'insertion (23), ladite première portion de matériau thermoplastique à l'état fondu pouvant alors sécher un instant. Le coulisseau de fermeture (14) est ensuite retiré, une seconde portion de matériau thermoplastique à l'état fondu étant ensuite injectée dans la cavité de structure principale (21) à l'aide d'une technique haute pression, la fusion de ladite seconde portion de matériau thermoplastique à l'état fondu pouvant avoir lieu avec ladite première portion de matériau thermoplastique à l'état fondu pour former une unité. Le matériau thermoplastique injecté est amené à refroidir et se solidifier, de qui permettant ensuite d'ouvrir le moule (10), de retirer le panneau intérieur (1) du moule et de répéter le processus.
PCT/SE2007/000982 2006-11-14 2007-11-07 Moule et procédé de fabrication de panneaux intérieurs par technique de moulage par injection WO2008060215A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0602423 2006-11-14
SE0602423-6 2006-11-14

Publications (1)

Publication Number Publication Date
WO2008060215A1 true WO2008060215A1 (fr) 2008-05-22

Family

ID=39401932

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2007/000982 WO2008060215A1 (fr) 2006-11-14 2007-11-07 Moule et procédé de fabrication de panneaux intérieurs par technique de moulage par injection

Country Status (1)

Country Link
WO (1) WO2008060215A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008005944A1 (de) * 2008-01-24 2009-07-30 Werkzeugbau Siegfried Hofmann Gmbh Verfahren zum Fertigen eines zwei oder mehr Komponenten aufweisenden Formkörpers
DE102009058716A1 (de) * 2009-12-17 2011-06-22 Volkswagen AG, 38440 Verfahren zur Herstellung eines Innenausstattungsbauteils für ein Kraftfahrzeug und durch ein derartiges Verfahren hergestelltes Innenausstattungsbauteil
WO2014149685A1 (fr) * 2013-03-15 2014-09-25 Basf Se Procédé de formation d'un bâti d'un dossier de siège pour un véhicule

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2268700A (en) * 1992-07-07 1994-01-19 Clearplas Ltd In-mould application of surface coatings to moulded articles
FR2702990A1 (fr) * 1993-03-23 1994-09-30 Eurostyle Sa Procédé de décor d'un support thermoplastique par surmoulage basse pression, décor et produits obtenus selon ce procédé.
US5372491A (en) * 1987-11-19 1994-12-13 Pebra Gmbh Paul Braun Device for manufacturing plastic moldings and use of the device
WO1996033061A1 (fr) * 1995-04-20 1996-10-24 United Technologies Automotive Systems, Inc. Procede et conception de moule pour une decoration dans le moule d'articles moules injectes
WO2002085608A1 (fr) * 2001-04-20 2002-10-31 Basf Aktiengesellschaft Corps façonnes en cuir et matiere thermoplastique offrant une douceur de toucher ameliore

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372491A (en) * 1987-11-19 1994-12-13 Pebra Gmbh Paul Braun Device for manufacturing plastic moldings and use of the device
GB2268700A (en) * 1992-07-07 1994-01-19 Clearplas Ltd In-mould application of surface coatings to moulded articles
FR2702990A1 (fr) * 1993-03-23 1994-09-30 Eurostyle Sa Procédé de décor d'un support thermoplastique par surmoulage basse pression, décor et produits obtenus selon ce procédé.
WO1996033061A1 (fr) * 1995-04-20 1996-10-24 United Technologies Automotive Systems, Inc. Procede et conception de moule pour une decoration dans le moule d'articles moules injectes
WO2002085608A1 (fr) * 2001-04-20 2002-10-31 Basf Aktiengesellschaft Corps façonnes en cuir et matiere thermoplastique offrant une douceur de toucher ameliore

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008005944A1 (de) * 2008-01-24 2009-07-30 Werkzeugbau Siegfried Hofmann Gmbh Verfahren zum Fertigen eines zwei oder mehr Komponenten aufweisenden Formkörpers
DE102008005944B4 (de) * 2008-01-24 2014-01-09 Werkzeugbau Siegfried Hofmann Gmbh Verfahren zum Fertigen eines zwei oder mehr Komponenten aufweisenden Formkörpers
DE102009058716A1 (de) * 2009-12-17 2011-06-22 Volkswagen AG, 38440 Verfahren zur Herstellung eines Innenausstattungsbauteils für ein Kraftfahrzeug und durch ein derartiges Verfahren hergestelltes Innenausstattungsbauteil
WO2014149685A1 (fr) * 2013-03-15 2014-09-25 Basf Se Procédé de formation d'un bâti d'un dossier de siège pour un véhicule
US10307949B2 (en) 2013-03-15 2019-06-04 Basf Se Method of forming a frame of a seat back for a vehicle

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