WO2006042818A1 - Procede de production de pieces moulees multicomposantes - Google Patents

Procede de production de pieces moulees multicomposantes Download PDF

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Publication number
WO2006042818A1
WO2006042818A1 PCT/EP2005/055201 EP2005055201W WO2006042818A1 WO 2006042818 A1 WO2006042818 A1 WO 2006042818A1 EP 2005055201 W EP2005055201 W EP 2005055201W WO 2006042818 A1 WO2006042818 A1 WO 2006042818A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
thermoplastic
station
pur
plastic
Prior art date
Application number
PCT/EP2005/055201
Other languages
German (de)
English (en)
Inventor
Christoph Lange
Jochen Mitzler
Original Assignee
Krauss-Maffei Kunststofftechnik Gmbh
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 Krauss-Maffei Kunststofftechnik Gmbh filed Critical Krauss-Maffei Kunststofftechnik Gmbh
Publication of WO2006042818A1 publication Critical patent/WO2006042818A1/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
    • B29C45/1657—Making multilayered or multicoloured articles using means for adhering or bonding the layers or parts to each other
    • 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
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • 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
    • B29C45/1657—Making multilayered or multicoloured articles using means for adhering or bonding the layers or parts to each other
    • B29C2045/166—Roughened surface bonds
    • B29C2045/1662—Roughened surface bonds plasma roughened surface bonds
    • 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
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/0441—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement
    • B29C45/045—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement mounted on the circumference of a rotating support having a rotating axis perpendicular to the mould opening, closing or clamping direction
    • 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
    • B29C45/1615—The materials being injected at different moulding stations
    • B29C45/1628—The materials being injected at different moulding stations using a mould carrier rotatable about an axis perpendicular to the opening and closing axis of the moulding stations
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
    • 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
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material

Definitions

  • the invention relates to a method for producing multicomponent plastic moldings from a first thermoplastic component and a second component from a polyurethane plastic (PUR).
  • PUR polyurethane plastic
  • Multi-component injection molded parts each consisting of a thermoplastic material, to increase the bonding force between the individual thermoplastic components by exposing the previously injection-molded thermoplastic component to a plasma gas stream prior to molding a subsequent thermoplastic component.
  • the preparation of a two-component molded part is described in which the first component is a thermoplastic hard component and the second component is a thermoplastic elastomer such as TPE.
  • a plasma spraying device is retracted between the tool halves after opening the injection mold and the shaped part of the thermoplastic hard component is exposed to a plasma jet.
  • the plasma spraying device is moved out of the opened injection mold, the mold halves are rotated and in the next step, in one mold to the pretreated mold part as a second component, a thermoplastic elastomer molded, while in the other form again a molding of the thermoplastic hard component is produced.
  • DE 195 40 333 C2 discloses a method in which a thermoplastic hard component is formed in a first injection step and then a corona treatment of the thermoplastic hard component is carried out in the adhesion region. In the subsequent injection step, a soft component is injected. By treating the connection areas by means of corona discharge, it was possible for the first time to produce a permanent connection between such different types of plastics.
  • a disadvantage of the corona treatment is that the corona is passed directly to the first molded part, ie the corona flashes hit the surface and leave there selectively their tracks. This leads to a comparatively inhomogeneous treatment of the first component, associated with a locally high thermal load.
  • the corona treatment is difficult to control, because the "flashes" are looking for their own goal.
  • the method is also not safe because of the open high voltage, as this may cause damage to the injection molding machine, the tool or the operator.
  • the present invention seeks to provide a method for producing a multi-component molded part of a first thermoplastic component and a second component of a polyurethane plastic (PUR), which with a good connection of the two components a smaller
  • thermoplastic component a permanent connection between a thermoplastic component and a polyurethane plastic is possible when the thermoplastic component is subjected to a plasma gas flow.
  • the method according to the invention can be dispensed with environmentally harmful adhesion promoter entirely.
  • the process can be carried out directly as a two-component process on an injection molding machine with a provided or integrated PUR system.
  • the thermoplastic pre-molded part can be produced in a known manner on an injection molding machine and then placed in a PUR system with a separate tool, inserted there and then flooded with PUR.
  • FIG. 1 shows a side view of a two-component injection molding machine 1 for producing a multi-component plastic molding of a first thermoplastic component and a second component of a polyurethane plastic (PUR component), with an injection unit 2 for the thermoplastic resin component on the one hand and a RIM device 3 (RIM: Reaction Injection Molding) for the PU component.
  • the injection unit 2 is connected to the outer
  • Platen 6 is coupled via a hydraulic adjusting element 25, with which the injection nozzle 36 can be brought to the platen 6 in injection position.
  • the RIM device is known per se and will therefore not be described in detail here. It essentially comprises conveying and metering mechanisms for the individual chemicals to be processed, such as polyol, isocyanate and possible additives. Via a mixing head not shown in FIG. 1, the RIM device is coupled to the mold clamping unit 4.
  • the mold clamping unit 4 consists of a machine frame 5 on which two outer mold mounting plates 6 and 7 are slidably supported via sliding shoes 8 and 9.
  • the mold platens 6 and 7 each carry a mold half 10 and 11.
  • the platen shown on the left in Figure 1 consists of a so-called sandwich plate, which consists of two in very small parallel distance composed of plates, one of which is a support plate 6 'and the other the mold support plate 6 ". Between the support plate 6' and the mold support plate 6" there are four hydraulic pressure pistons 12, of which only the two front can be seen in the drawing are.
  • a central mold support element 13 which has two opposite Formaufspannvidin, on each of which a left and a right central mold half 16 and 17 is attached.
  • the mold carrier element can also be designed as a cube with four mold mounting surfaces.
  • the mold support element 13 is mounted with its vertical axis of rotation 18 in a fixedly connected to the machine frame 5 supporting frame 19. Die Form der Tragica 19 ist in Fig. 2 sensible. On the support frame 19 is a rotary drive 20, with which the mold support member 13 can be associated with the two central tool halves 16 and 17 of each of the two outer mold halves 10 and 11.
  • the two outer platens 6 and 7 are interconnected by four columns 21.
  • the four columns are fixed in the support plate.
  • the columns 21 pass through the right outer platen 7 and are lockable behind this.
  • the locking system consists of sawtooth-shaped grooves 22 formed in the end region of the columns 21, into which complementary sawtooth-shaped grooves of two mutually movable half-shells 23 and 24 can be retracted in a latching manner.
  • the columns 21 pass through the support frame 19 in sliding guides.
  • FIG 2 the arrangement of Figure 1 is shown schematically in plan view, wherein two handling robots 38, 39 are each provided laterally adjacent to the open mold halves 10, 16 and 11, 17.
  • the first handling robot 38 is designed as a processing robot 38 and equipped with a plasma nozzle 50, as described in more detail in Figure 3.
  • the handling robot 39 may be a removal robot 39.
  • the operation of the two-component injection molding machine is as follows. In station I, a cavity for a preform made of a thermoplastic material is formed when the mold halves 10 and 16 are closed. Plastic melt is injected into the cavity thus formed via the injection nozzle 36, which in this case has moved up to the tool clamping plate 6. If the thermoplastic pre-molded part is sufficiently cooled and solidified, the station I is ascended.
  • the plasma nozzle 50 is retracted between the mold halves 10 and 16 and moved over the located in the mold half 16 thermoplastic pre-molded part, so that its free surface can be acted upon by a plasma gas flow.
  • the plasma nozzle is pivoted over the pre-molded part so that the entire surface or only parts thereof are subjected to a plasma gas flow.
  • the plasma nozzle 50 is moved out of the station I and the mold support element 13 is rotated by 180 °, so that the pre-molded part is now in the station II.
  • the mold closing unit can be closed again and the thermoplastic pre-molded part in the station Il are flooded with a feedable via the mixing head 37 polyurethane plastic (PUR component). Parallel to this, in station I the next pre-molded part made of thermoplastic material can be produced. If the mold clamping unit is subsequently driven up again, the finished two-component plastic molded part, which consists of a first thermoplastic component and a second polyurethane component, can be removed from the station II by means of the removal robot 39.
  • the processing robot 38 with the plasma nozzle 50 can also be arranged at the station II.
  • the preform is first moved from station I to station II and then charged with the plasma gas stream.
  • Processing robot can be arranged with plasma nozzles.
  • the preform can both immediately after opening the station I and after the Taking his position in the station II, so immediately before flooding with the PUR component, be subjected to a plasma gas flow.
  • both compact and foaming polyurethane plastics can be used. If, for example, a "soft" surface is to be produced for reasons of improved haptics, foaming, soft or elastic PUR plastics are to be preferred, and if desired, any additives, for example fibers, dyes or the like, can be added to the PU plastic.
  • a suitable plasma nozzle 50 has a stainless steel housing 52 with a nozzle head 53 and an insulating layer 54 on the inner wall of the housing 52.
  • a gas line 62 which is connected to a gas supply station, not shown here.
  • a pinhole 55 divides the interior of the housing 52 into a gas feed space 56 and a gas discharge space 57.
  • a first electrode 58 is attached to the pinhole 55, which is connected via a line 59 to a high voltage source not shown here.
  • the nozzle head 53 of the stainless steel housing 52 acts as a second electrode, which is grounded.
  • a plasma 60 is ignited between the electrode 58 and the nozzle head 53, which emerges from the nozzle and impinges on the surface of the pre-molded part 61 as a plasma gas stream 51.
  • a plasma gas stream 51 With this plasma gas stream 51, a uniform and comparatively gentle treatment of the pre-molded parts is possible.
  • thermoplastic component RIM device for PUR component Mold clamping unit Machine frame First fixed mold clamping plate (sandwich plate) 'Backing plate' Mold carrier plate Second fixed mold clamping plate, 9 sliding shoes 0, 11 Tool halves 2 Pressure piston 3 Rotatable mold carrier element 6, 17 Tool halves 8 Rotary axis 9 Support frame 0 Rotary actuator 1 Columns 2 Grooves 3, 24 Half shells 5 Hydraulic control element 6 Injector 7 RIM mixing head 8 Machining robot 9 Removal robot 0 Plasma nozzle 1 Plasma gas flow 2 Housing 3 Nozzle head 4 Insulation layer 5 Perforated diaphragm Gas supply space

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

Abstract

L'invention concerne un procédé de production de pièces moulées en plastique multiocomposantes comportant une première composante thermoplastique (pièce thermoplastique prémoulée par injection) et une deuxième composante de plastique polyuréthane (composante PUR). L'invention est caractérisée en ce qu'une fois produite la pièce thermoplastique prémoulée par injection, cette dernière est soumise, dans la zone de liaison, à un flux de gaz plasmagène et alors seulement cette pièce thermoplastique prémoulée par injection est submergée de la composante PUR. Cela permet d'obtenir une liaison bonne et durable entre ces deux types de plastique différents.
PCT/EP2005/055201 2004-10-20 2005-10-12 Procede de production de pieces moulees multicomposantes WO2006042818A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004051249.3 2004-10-20
DE200410051249 DE102004051249A1 (de) 2004-10-20 2004-10-20 Verfahren zur Herstellung von mehrkomponentigen Kunststoffformteilen

Publications (1)

Publication Number Publication Date
WO2006042818A1 true WO2006042818A1 (fr) 2006-04-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/055201 WO2006042818A1 (fr) 2004-10-20 2005-10-12 Procede de production de pieces moulees multicomposantes

Country Status (2)

Country Link
DE (1) DE102004051249A1 (fr)
WO (1) WO2006042818A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006010310A1 (de) * 2006-03-07 2007-09-13 Krauss-Maffei Kunststofftechnik Gmbh Vorrichtung und Verfahren zur Herstellung von Mehrkomponenten-Kunststoffteilen

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KR101209795B1 (ko) * 2010-11-26 2012-12-10 현대자동차주식회사 압출-사출-발포 연속성형 공법을 이용한 언더커버의 제조방법
EP2910357A1 (fr) * 2014-02-20 2015-08-26 Basf Se Procédé de fabrication d'un élément composite
DE102015008953B4 (de) 2015-07-10 2021-10-07 Audi Ag Verfahren zum Vorbehandeln thermoplastischer Bauteile zum Strukturkleben - und Vorrichtung zum Bearbeiten einer Oberfläche
DE102019105374B4 (de) * 2019-03-04 2022-11-10 Erlenbach Gmbh Formteilmaschine, Maschinensystem und Verfahren

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JPS6189146A (ja) * 1984-10-04 1986-05-07 Daihatsu Motor Co Ltd 自動車用バンパ−の製造法
US20010040316A1 (en) * 1999-10-28 2001-11-15 Stewart David M.H. Method of making polyurethane composite materials
DE10308727B3 (de) * 2003-02-28 2004-06-09 Krauss-Maffei Kunststofftechnik Gmbh Verbundbauteil mit teilbeweglichen Elementen und Verfahren zu dessen Herstellung
DE10308742A1 (de) * 2003-02-28 2004-09-16 Krauss-Maffei Kunststofftechnik Gmbh Verfahren zur Herstellung von mehrkomponentigen Kunststoffformteilen
DE10308989A1 (de) * 2003-03-01 2004-09-16 Krauss-Maffei Kunststofftechnik Gmbh Verfahren und Vorrichtung zur Herstellung von Verbund-Kunststoffteilen

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DE19858270A1 (de) * 1998-12-17 2000-06-21 Ticona Gmbh Verbundkörper aus technischen Thermoplasten und Polyurethan-Elastomeren unter Verwendung eines Haftvermittlers
EP1467849B1 (fr) * 2002-01-22 2011-03-09 Weidmann Plastics Technology AG Procede de fabrication d'un corps moule collable et corps moule fabrique selon ce procede

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JPS6189146A (ja) * 1984-10-04 1986-05-07 Daihatsu Motor Co Ltd 自動車用バンパ−の製造法
US20010040316A1 (en) * 1999-10-28 2001-11-15 Stewart David M.H. Method of making polyurethane composite materials
DE10308727B3 (de) * 2003-02-28 2004-06-09 Krauss-Maffei Kunststofftechnik Gmbh Verbundbauteil mit teilbeweglichen Elementen und Verfahren zu dessen Herstellung
DE10308742A1 (de) * 2003-02-28 2004-09-16 Krauss-Maffei Kunststofftechnik Gmbh Verfahren zur Herstellung von mehrkomponentigen Kunststoffformteilen
DE10308989A1 (de) * 2003-03-01 2004-09-16 Krauss-Maffei Kunststofftechnik Gmbh Verfahren und Vorrichtung zur Herstellung von Verbund-Kunststoffteilen

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FRIEDRICH J F ET AL: "PRETREATMENT OF POLYMERS WITH ATMOSPHERIC- AND LOW-PRESSURE PLASMASFOR THE PRODUCTION OF HIGH-STRENGTH BONDS WITH POLYURETHANES", INTERNATIONAL POLYMER SCIENCE AND TECHNOLOGY, RAPRA TECHNOLOGY, SHREWABURY, GB, vol. 21, no. 8, January 1994 (1994-01-01), pages T01 - 8, XP000485142, ISSN: 0307-174X *
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006010310A1 (de) * 2006-03-07 2007-09-13 Krauss-Maffei Kunststofftechnik Gmbh Vorrichtung und Verfahren zur Herstellung von Mehrkomponenten-Kunststoffteilen

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Publication number Publication date
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