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EP2029344A1 - Partie de toit de véhicule composée d'au moins deux couches de plastique et procédé de production d'une telle partie de toit de véhicule - Google Patents

Partie de toit de véhicule composée d'au moins deux couches de plastique et procédé de production d'une telle partie de toit de véhicule

Info

Publication number
EP2029344A1
EP2029344A1 EP07722433A EP07722433A EP2029344A1 EP 2029344 A1 EP2029344 A1 EP 2029344A1 EP 07722433 A EP07722433 A EP 07722433A EP 07722433 A EP07722433 A EP 07722433A EP 2029344 A1 EP2029344 A1 EP 2029344A1
Authority
EP
European Patent Office
Prior art keywords
plastic
plastic layer
vehicle roof
layer
roof part
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Withdrawn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
EP07722433A
Other languages
German (de)
English (en)
Inventor
Martin Pollak
Ralf Schwaighofer
Andreas Lang
Markus Boss
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.)
Webasto SE
Original Assignee
Webasto SE
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 Webasto SE filed Critical Webasto SE
Publication of EP2029344A1 publication Critical patent/EP2029344A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B29C2045/1682—Making multilayered or multicoloured articles preventing defects
    • 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
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks

Definitions

  • the invention relates to a vehicle roof part made of at least two plastic layers according to the preamble of patent claim 1 and a method for producing such a vehicle roof roof part according to patent claims 10 and 11.
  • a generic vehicle roof is known from DE 34 25 104 C2.
  • a reinforcing rib is arranged on the underside of a roof part made of plastic. This is either formed in several parts and glued or integrally formed, in which case a cavity in the reinforcing rib should avoid too much accumulation of material, which leads to sink marks at the top of the roof part.
  • a cavity produced in the internal gas pressure process on a stiffening rib of a lid is provided to avoid sink marks at the top of the lid.
  • the invention has for its object to provide a vehicle roof part of at least two plastic layers and to provide a method for producing a consisting of at least two juxtaposed plastic layers roof panel by means of which sink marks on the outer visible surface avoided or at least greatly reduced.
  • This object is achieved with respect to the vehicle roof part by the features of claim 1 and in terms of the method by the features of claim 10 and 11.
  • Advantageous embodiments of the invention are specified in the respective subclaims.
  • the invention provides in essence that a downwardly pointing, a leaching preventive increase in material is arranged on the underside of the first plastic layer of the roof part, as it were, or is formed during the production, optionally or additionally, a later sinking point can compensate Be provided material increase at the top of the first plastic layer of the roof part or be.
  • the elevation has a raised positive shape complementary to an otherwise trough-shaped leaching.
  • the layers of the roof part are preferably made of a polycarbonate (PC) by spraying in the two-component method.
  • PC polycarbonate
  • the material increase is injected directly onto the underside or the upper side of the first plastic layer.
  • at least one of the plastic layers of the roof part may also be made of a polycarbonate blend, such as acrylonitrile-butadiene-styrene-polycarbonate blend (ABS-PC), a PC-copolymer or another PC-compatible material, such as Polyethylene terephthalate (PET) or polymethyl methacrylate (PMMA) exist.
  • ABS-PC acrylonitrile-butadiene-styrene-polycarbonate blend
  • PET Polyethylene terephthalate
  • PMMA polymethyl methacrylate
  • Figure 1 is a schematic perspective view of a vehicle roof in the closed state.
  • Fig. 2 is a schematic partial cross section of a first embodiment of the
  • Vehicle roof with a hollow chamber having
  • FIG. 3 shows a schematic partial cross section of a second embodiment of the vehicle roof with a solid reinforcing rib
  • Fig. 4 is an enlarged view of a roof part with a without the
  • Fig. 6 is an enlarged view of a roof part of FIG. 4 without
  • the vehicle roof 10 shown in Fig. 1 is composed of a front roof part 12, a rear roof part 14, a front cross member 16, a rear cross member 18 and arranged on both sides side rails 20.
  • the side rails 20 can be used as separate components with the columns, the A-pillar 24, the B-pillar 26 and the C or D-pillar 28 may be connected to which the roof parts 12 and 14 are mounted fixed or movable.
  • the roof parts 12 and 14 are preferably components of a RHT (Retractable Hardtop), ie a fixed-element convertible, in which the inherently rigid roof parts to release a convertible-like roof opening can be moved by means of a Mechnik in a storage space in the rear of the vehicle ,
  • RHT Retractable Hardtop
  • the roof parts 12 and 14 consist at least in partial areas of at least two plastic layers 32 and 34, preferably made of a polycarbonate (PC).
  • a polycarbonate such as acrylonitrile-butadiene-styrene-polycarbonate blend (ABS-PC), a PC copolymer or other PC compatible material such as polyethylene terephthalate (PET) or polymethyl methacrylate (PMMA).
  • ABS-PC acrylonitrile-butadiene-styrene-polycarbonate blend
  • PC copolymer or other PC compatible material such as polyethylene terephthalate (PET) or polymethyl methacrylate (PMMA).
  • the outer first plastic layer 32 is optionally sealed to the outside by a thin scratch-resistant, preferably transparent lacquer layer 36 (FIG. 6).
  • a reinforcing rib 37 formed from a second plastic layer 34 is injection-molded with a cavity 38 formed therein.
  • the reinforcing rib 37 is formed solid without a cavity.
  • FIG. 4 shows how, without an application of the invention, in the region of an injection point 50 for the second plastic layer 34, a leaching 42 on the inside of the first plastic layer 32 is produced by the plastic material impinging on the separating surface 40.
  • the depth D 42 of the leaching 42 is about 1 to 1, 5 mm.
  • a convex material increase Z 42 is formed on the inside of the first plastic layer 32 Shape and size is approximately complementary to the otherwise occurring at this point leaching 42 (Figure 4).
  • the material increase Z 42 is positioned exactly at the level of the injection point 50 for the second plastic layer 34.
  • the arched material increase Z 42 is again exactly removed, so that, as shown in FIG. 6, the parting surface 40 between the two plastic layers 32 and 34 in the finished roof part 12 is ideally completely flat.
  • a further material increase Z 44 is provided on the opposite outer side of the first plastic layer 32, which is only a few thousandths of a millimeter high and compensates for a shrinkage starting from a washout 42 on the inside of the plastic layer 32.
  • the material increase Z 44 is provided as a deterrent to shrinkage on the outside.
  • the invention provides a simple cost-effective way to create a vehicle roof part or an entire roof module made of plastic optionally with integrated Holmen without visually disadvantageous sink marks on the outer visible surfaces.
  • the surface is preferably formed high gloss (glazing).
  • a pillar D 34 thickness (from 34)

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

L'invention concerne un toit de véhicule comprenant une partie de toit (12) en plastique, ainsi qu'un procédé de production d'une partie de toit (12) de véhicule composée au moins partiellement de deux couches de plastique injectées l'une sur l'autre. Selon l'invention, pour éviter ou compenser des dépressions en surface, la première couche de plastique (32) située à l'extérieur présente au moins une saillie (Z<SUB>42</SUB> ou Z<SUB>44</SUB>) dans la région d'un point d'injection (50) pour la deuxième couche de plastique située à l'intérieur.
EP07722433A 2006-05-15 2007-05-15 Partie de toit de véhicule composée d'au moins deux couches de plastique et procédé de production d'une telle partie de toit de véhicule Withdrawn EP2029344A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610022921 DE102006022921B4 (de) 2006-05-15 2006-05-15 Fahrzeug-Dachteil aus wenigstens zwei Kunststoffschichten und Verfahren zum Herstellen eines solchen Fahrzeug-Dachteils
PCT/DE2007/000885 WO2007131493A1 (fr) 2006-05-15 2007-05-15 Partie de toit de véhicule composée d'au moins deux couches de plastique et procédé de production d'une telle partie de toit de véhicule

Publications (1)

Publication Number Publication Date
EP2029344A1 true EP2029344A1 (fr) 2009-03-04

Family

ID=38512404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07722433A Withdrawn EP2029344A1 (fr) 2006-05-15 2007-05-15 Partie de toit de véhicule composée d'au moins deux couches de plastique et procédé de production d'une telle partie de toit de véhicule

Country Status (3)

Country Link
EP (1) EP2029344A1 (fr)
DE (1) DE102006022921B4 (fr)
WO (1) WO2007131493A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6357935B2 (ja) * 2014-07-14 2018-07-18 三菱エンジニアリングプラスチックス株式会社 多色成形品及びその成形方法
JP6405908B2 (ja) * 2014-11-07 2018-10-17 三菱エンジニアリングプラスチックス株式会社 多色成形品及びその成形方法
CN114216807A (zh) * 2022-01-30 2022-03-22 重庆长安汽车股份有限公司 一种汽车内饰塑料件耐磨性的测试方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5544817A (en) * 1978-09-25 1980-03-29 Aisin Seiki Co Ltd Method for molding hydrauric cylinder
JPS59146826A (ja) * 1983-02-10 1984-08-22 Hashimoto Forming Co Ltd 合成樹脂成形品の製造方法
DE3425104C2 (de) * 1984-07-07 1986-07-24 Farmont Produktion GmbH & Co KG, 4000 Düsseldorf Sonnendach für Fahrzeuge
JP3006069B2 (ja) * 1990-10-26 2000-02-07 タカタ株式会社 エアバッグ装置のモジュールカバー
JPH068314A (ja) * 1992-06-26 1994-01-18 Toppan Printing Co Ltd シート成形用プリフォーム及び容器の製造方法
DE4334012C1 (de) * 1993-10-06 1994-10-27 Webasto Karosseriesysteme Deckel eines Schiebe-/Hebedaches für Fahrzeuge
JPH1177740A (ja) * 1997-09-17 1999-03-23 Toyota Autom Loom Works Ltd 樹脂成形品とその製造方法及び成形型
US8173244B2 (en) * 2004-01-14 2012-05-08 Franz Josef Summerer Transparent sheet-like shaped plastic part with concealed sprue mark, and process for producing it
CA2457266A1 (fr) * 2004-02-11 2005-08-11 Dbm Reflex Enterprises Inc. Procede d'injection de prismes retroreflecteurs de grandes dimensions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007131493A1 *

Also Published As

Publication number Publication date
DE102006022921B4 (de) 2008-02-07
WO2007131493A1 (fr) 2007-11-22
DE102006022921A1 (de) 2007-11-22

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