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
• • 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
  • 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
  • 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
  • B29C45/1679—Making multilayered or multicoloured articles applying surface layers onto injection-moulded substrates inside the mould cavity, e.g. in-mould coating [IMC]
• • 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
  • B29C45/14778—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 the article consisting of a material with particular properties, e.g. porous, brittle
  • B29C45/14811—Multilayered articles
• • 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
  • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts

Definitions

• the invention relates to a method for producing a composite molded part from a plurality of plastic layers and its use.
• the object was therefore to provide a method with which it is possible in a technically simple and cost-effective manner to produce composite moldings of several layers, so that the layers are adhesively bonded together and optionally other elements, such as fasteners in the manufacture can be attached directly with.
• the invention relates to a method for producing a composite part of a plurality of layers, wherein
• a plastic film which is optionally at least partially coated on at least one side, is inserted into a first half of an opened injection mold
• the tool is closed by attaching the second half of the tool to the first half so as to form a cavity
• the film used may preferably be at least partially coated on at least one side.
• the erf ⁇ ndungssiee method can be carried out so that the coated film is inserted in step a) in the mold half that either the Beschichrung is directed to the mold wall or that the Beschichrung is facing away from the wall of the mold half.
• the plastic film used is preferably 0.175 to 3.00 mm thick.
• the film can be coated by screen printing, by vacuum or by other known coating techniques. As coating materials, paints, metals or the like can be used.
• the simplest embodiment is a three-layer structure made of a plastic film, for example a metal layer and then again a plastic film.
• the advantage of such a construction is that the coating is protected.
• the film which is inserted in one half of the open tool, does not slip, it is preferably fixed by vacuum, static charge or by mechanical anchoring in the mold half.
• the film is inserted into the mold half with the coating pointing inwards, this coating is covered directly with the injected plastic during the back molding process. If, on the other hand, the film is inserted into the tool in such a way that the coating faces outwards, the plastic is injected directly onto the plastic film during the back molding process.
• the film used is preferably transparent.
• Polycarbonate (PC), polymethylmethacrylate (PMMA), styrene-acrylonitrile (SAN) and cycloolefin copolymers (COC), transparent polyamide and blends of these plastics are preferably used as the plastic material for the film.
• plastic for the back molding preferably PC, SAN, COC and PMMA is used.
• the plastics for the back molding are also preferably transparent.
• the tool is preferably heated to 70 to HO 0 C for step c). - -
• the mold After injection, the mold is opened after cooling. Thereafter, the mold half, in which the molding is located, merged with a new mold half, wherein a cavity between the wall of the new mold half and the molding is formed.
• This cavity is a gap between the wall of the new mold half and the mold part.
• This cavity can be formed either by the new tool half being slightly larger than the previous tool half that has been removed, or by the mold part having shrunk during the cooling process. In this case you do not need a new larger mold half, but can use half that was previously used.
• the paint is introduced.
• the gap corresponds to the thickness of the applied paint.
• the lacquer used can be the known lacquer systems which offer UV protection and / or scratch resistance, such as e.g. Urethane acrylates, 2-component polyurethane coatings or inorganic paints, preferably based on polysiloxanes.
• the composite parts according to the invention can be used in the automotive industry, in particular as interior and exterior mirrors for vehicles and in other industries as a molded part.
• Figure 1 shows under A) a mold having a first half (1) and a second half (2), wherein in the first half of a plastic film (4) is inserted. Under B), the mold is closed, in which the two halves are placed on each other and thereby a cavity (5) is formed. C) and D) show the replacement of the half (1) by a further half (3), after in the cavity (5) a plastic (6) was injected. E) shows the paint (7) injected into the gap formed by the second half (2) and the other half (3). Under F), the molding (8) is removed.
• Figure 2 shows under A) a mold with a first half (1) and a second half (2), wherein in the first half of a plastic film (4) is inserted. Under B), the mold is closed, in which the two halves are placed on each other and thereby a cavity (5) is formed. C) and D ') show the replacement of the half (2) by a further half (3) after a plastic (6) has been injected into the cavity (5). E ') shows the paint (7) injected into the gap formed by the first half (1) and the other half (3). Under F '), the molding (8) is removed.
• a metallized polycarbonate film (Makrolon® DE 1.1, 0.175 mm thick) was placed in a first tool half in a steel tool. By electrostatic charging, this film was kept in the tool.
• the mold temperature was about 7O 0 C.
• After closing the mold by means of the second tool half was injected polycarbonate (Makrolon® 2647 AL) in the tool.
• the temperature of the Makrolon® AL 2647 was 29O 0 C.
• the injection time was about 5 seconds.
• After about 30 seconds of cooling time, the tool is opened. The molding remained in the first half of the mold. Thereafter, a new mold half was used to close the tool. There remained a gap between the Makrolon® Al 2647 of the molded part and the new mold half.
• the gap was set to about 0.1 mm.
• a 2-component polyurethane varnish ⁇ ) (based on Desmophen® and Desmodur®) was injected.
• the paint system had a temperature of 80 0 C and the tool of about 6O 0 C.
• the injection time was about 2 seconds. To cure the paint about 80 seconds were needed. Thereafter, the tool was opened and removed the finished composite part.
• the paint used 1 is a solvent-free aliphatic polyurethane paint from a mixture of a solvent-free polyester polyol (Desmophen® VPLS 22 49-1 Fa. Bayer MaterialScience AG) and a solvent-free aliphatic polyisocyanate (Desmodur® XP 2410 Fa. Bayer MaterialScience AG) in a ratio of 1: 1 (with about 1 wt .-% DBTL (dibutyltin dilaurate) catalyzed).

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

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (17)

Citations (5)

Family Cites Families (24)

• 2004
  • 2004-12-24 DE DE102004062477A patent/DE102004062477A1/de not_active Withdrawn
• 2005
  • 2005-12-10 CN CNA2005800442608A patent/CN101087681A/zh active Pending
  • 2005-12-10 WO PCT/EP2005/013278 patent/WO2006072361A1/de not_active Ceased
  • 2005-12-10 KR KR1020077016880A patent/KR101277384B1/ko not_active Expired - Fee Related
  • 2005-12-10 CN CN201410138769.XA patent/CN103909611A/zh active Pending
  • 2005-12-10 EP EP05818703.0A patent/EP1838511B1/de not_active Expired - Lifetime
  • 2005-12-10 JP JP2007547252A patent/JP4954894B2/ja not_active Expired - Lifetime
  • 2005-12-21 US US11/313,420 patent/US8287789B2/en active Active

Patent Citations (5)

Non-Patent Citations (3)

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