WO2008107265A1 - Outil pouvant être chauffé - Google Patents

Outil pouvant être chauffé Download PDF

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Publication number
WO2008107265A1
WO2008107265A1 PCT/EP2008/051626 EP2008051626W WO2008107265A1 WO 2008107265 A1 WO2008107265 A1 WO 2008107265A1 EP 2008051626 W EP2008051626 W EP 2008051626W WO 2008107265 A1 WO2008107265 A1 WO 2008107265A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrically conductive
conductive ceramic
heated tool
tool according
insulation layer
Prior art date
Application number
PCT/EP2008/051626
Other languages
German (de)
English (en)
Inventor
Erwin Buerkle
Marcel Burr
Andreas Mueller
Original Assignee
Kraussmaffei Technologies 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 Kraussmaffei Technologies Gmbh filed Critical Kraussmaffei Technologies Gmbh
Publication of WO2008107265A1 publication Critical patent/WO2008107265A1/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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2737—Heating or cooling means therefor

Definitions

  • the present invention relates to a heatable tool for a plastic or molten metal processing molding apparatus according to the preambles of claims 1, 2 and 6.
  • the heating conductor is formed from an electrically conductive, sintered, ceramic body, which is fixedly connected to an outer body made of an electrically insulating, sintered, ceramic material.
  • Such a heating element is subsequently only very limited in its geometric shape adaptable or changeable. Processing with EDM processes is not possible due to the electrical insulation.
  • Shaping devices of the type mentioned above which have an electrically conductive ceramic as a heating element, are known for example from DE 103 37 685, DE 37 12 128 C2, DE 199 42 364 C2 and WO 00/54949. It is also known to interpose an electrical insulation layer between the electrically conductive ceramic and a carrier material or a cavity surface. This is necessary because otherwise during the heating or the energization of an integrated in a tool electrically conductive ceramic at the interface between the carrier material and ceramic, wherein the carrier material is usually made of tool steel, an uncontrolled coupling or a flow of the heating current in the electrically conductive Carrier material takes place.
  • the intermediate layer should not only be electrically insulating but, depending on the application, either thermally highly conductive or thermally well insulating. In any case, a temperature stability of up to 800 ° C and a high pressure resistance should be ensured. Moreover, it is helpful if the electrical insulation layer can be easily and reliably integrated into the heatable tool. To solve this problem, three alternative solutions are proposed according to the invention.
  • a first possible solution is characterized by a thermal oxidation of Keramikmatehals. This is especially possible with selected ceramics such as SisN 4 / TiN. This forms a non-conductive outer skin on the ceramic material.
  • the electrically conductive ceramic is brought to temperatures in the range between 600 and 1200 ° C. To avoid distortion and cracking of the ceramic, the heating or cooling rate should be below 5 K / min.
  • the thermal oxidation offers the possibility of forming an electrically insulating cover layer with a high mechanical and thermal stability as well as a largely constant thermal conductivity.
  • a good thermal conductivity is particularly useful if the heating element is integrated in the tool below the Kavticians simulation.
  • thermoplastically processable polymers based on polyimides (PI), liquid crystalline polymers (LCP), polyether ketones (PEK), polyether sulfones (PES) and by the use of thermosets.
  • PI polyimides
  • LCP liquid crystalline polymers
  • PEK polyether ketones
  • PES polyether sulfones
  • thermosets thermosets
  • the layer may be formed, for example, by using a thermoset material in the form of a thick plate, which is arranged between the electrically conductive ceramic and the carrier material.
  • thermoplastically processable polymers may be provided for example in the form of films, which are in particular self-adhesive. These will already offered by different manufacturers. Such films are available calibrated in terms of film thickness, otherwise the thermoplastic or Duroplastwerkstoffe can be machined and easily, for example, by milling or grinding, are brought to the final dimensions.
  • nitrides for example, silicon nitride (SisN 4 ), boron nitride (BN), carbon nitride (CsN 4 ) can be used.
  • oxides for example, silicon dioxide (SiO 2) is considered.
  • carbides boron carbide (B 4 C) or silicon carbide (SiC) can be used.
  • the surfaces of a ceramic heating element can be subsequently isolated.
  • a targeted influencing of the current density of the sintered, ceramic heating elements is possible due to the freely variable geometry of the conductor, whereby a targeted adjustment of the temperature distribution at the Schuleiterober Design is possible.
  • FIG. 1 is a schematic sectional view through a mold half of a heatable tool according to a first embodiment of the present invention
  • FIG. 2 is a schematic sectional view through a mold half of a heatable tool according to a second embodiment of the present invention
  • Fig. 3 is a schematic sectional view through a mold half of a heatable tool according to a third embodiment of the present invention.
  • FIG. 4 shows a schematic sectional view through a mold half of a heatable tool according to a fourth embodiment of the present invention.
  • All of the devices shown in FIGS. 1 to 4 are tool halves of a heatable tool. These tool halves interact with a - not shown - another part of a tool together. These two tool halves are usually arranged on clamping plates of a clamping unit for injection molding machines. Such closing units are well known and need not be explained in detail here. In this respect, only the subject of the invention will be discussed.
  • a tool half in which a tool carrier is provided 12.1, the cooling channels 20.1, through which a tempering, for example, a cooling fluid can be passed.
  • an electrically conductive ceramic 16.1 is arranged substantially over the entire width of the tool carrier in the form of a layer.
  • the electrically conductive ceramic 16.1 is over the entire surface of an electrical insulation layer 18.1 surrounded, which is missing only at the position of the electrical connections.
  • a further tool element in the form of a Kavticiansseite 14.1 is applied, in such a way that the electrically conductive ceramic 16.1 sandwiched between the tool holder 12.1 and the Kavmaschines Mrs 14.1 is included.
  • two electrical connection lines 22.1 are brought to the electrically conductive ceramic 16.1 and contacted there at the locations where the electrical insulation layer 18.1 is omitted.
  • the electrical insulation layer has been produced by thermal oxidation.
  • the electrically conductive ceramic 16.1 is heated in an oven to a temperature between 600 ° C and 1200 ° C, at a heating or cooling rate of, for example, 3 K / min.
  • the heating or cooling rate should be less than 5 K / min, since in this way warping and cracking of the ceramic is avoided.
  • the ceramic can be inserted between the two layers, namely the tool carrier 12.1 and the cavity layer 14.1.
  • connection lines 22.2 are guided through recesses (for example bores) in the tool carrier 12.2 to the electrically conductive ceramic, wherein the film is mechanically removed at the connection points.
  • FIGS. 3 and 4 Further embodiments of the present invention are shown in Figures 3 and 4, wherein in both illustrated embodiments, the electrically conductive ceramic 14.3 and 14.4 simultaneously forms the Kavticiansober Design. In both cases, a cooling channel 20.3 and 20.4 is formed in the electrically conductive ceramic 14.3, which can serve for cooling. In both cases, the electrically conductive ceramic is arranged over its entire surface on a thin tool carrier 12.3 and 12.4. The electrically conductive ceramics are contacted via connection lines 22.3 and 22.4, which in turn extend through the tool carrier 12.3 and 12.4. The difference between FIGS. 3 and 4 is that the insulation layer 18. 4 is considerably thicker than the insulation layer 18. 3.
  • the insulating layer 18.4 acts both electrically and thermally insulating.
  • the cooling channels 20.4 are simultaneously integrated in the electrically conductive ceramic, so that both the heat energy and the heat dissipation to and from the cavity are removed. or can be routed away without the need for the thermal influence of the tool carrier.

Landscapes

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

Abstract

L'invention concerne un outil pouvant être chauffé pour un dispositif traitant une matière plastique ou un métal en fusion. Cet outil comprend un matériau porteur sur lequel est disposé un organe de chauffage constitué d'une céramique électriquement conductrice et d'une surface de cavité, sachant qu'une couche d'isolation électrique est disposée entre le matériau porteur et la céramique électriquement conductrice. La couche d'isolation est formée par oxydation thermique, par des matériaux polymères ou par déposition de couches électriquement non conductrices.
PCT/EP2008/051626 2007-03-02 2008-02-11 Outil pouvant être chauffé WO2008107265A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007010099A DE102007010099A1 (de) 2007-03-02 2007-03-02 Beheizbares Werkzeug
DE102007010099.1 2007-03-02

Publications (1)

Publication Number Publication Date
WO2008107265A1 true WO2008107265A1 (fr) 2008-09-12

Family

ID=39338348

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/051626 WO2008107265A1 (fr) 2007-03-02 2008-02-11 Outil pouvant être chauffé

Country Status (2)

Country Link
DE (1) DE102007010099A1 (fr)
WO (1) WO2008107265A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130233476A1 (en) * 2010-08-27 2013-09-12 Alliant Techsystems Inc. Out-of-autoclave and alternative oven curing using a self heating tool
EP2907881B1 (fr) 2014-02-07 2019-04-24 Benteler Automobiltechnik GmbH Ligne de moulage à chaud et procédé de fabrication de produits de tôle moulés à chaud

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013014030B4 (de) 2013-08-26 2023-06-29 QSIL Ingenieurkeramik GmbH Keramisches Heizelement und Umformwerkzeug sowie Verfahren zur Herstellung eines keramischen Heizelements
DE202013007509U1 (de) 2013-08-26 2014-11-28 FCT Hartbearbeitungs GmbH Keramisches Heizelement und Umformwerkzeug
EP2842738B1 (fr) 2013-08-26 2020-06-24 FCT Ingenieurkeramik GmbH Procédé de fabrication d'un élément de chauffage en céramique
DE102014223665A1 (de) * 2014-11-20 2016-05-25 Kunststoff-Technik Scherer & Trier Gmbh & Co. Kg Spritzgusswerkzeug, Verfahren zur Herstellung eines Spritzguss-Bauteils und Spritzguss-Bauteil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4912286A (en) * 1988-08-16 1990-03-27 Ebonex Technologies Inc. Electrical conductors formed of sub-oxides of titanium
WO1991007068A1 (fr) * 1989-10-31 1991-05-16 Dr. Peter Nesvadba Gesellschaft M.B.H. Dispositif de chauffage autoregulateur
EP0635993A2 (fr) * 1993-07-20 1995-01-25 TDK Corporation Elément chauffant céramique
EP1341216A1 (fr) * 2000-12-05 2003-09-03 Ibiden Co., Ltd. Substrat ceramique pour dispositifs de production et de controle de semi-conducteurs et procede de production dudit substrat ceramique
WO2005018908A2 (fr) * 2003-08-16 2005-03-03 Krauss-Maffei Kunststofftechnik Gmbh Outil chauffable

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
DE3712128A1 (de) 1987-04-10 1988-10-27 Opt Engineering Ag Formeinsatz mit kratzfester polierter formoberflaeche, insbesondere fuer giess- und spritzgiesswerkzeuge, und dessen verwendung bei der herstellung von kunststoffteilen, insbesondere solchen mit optischer oberflaechenqualitaet
FI82412C (fi) * 1988-07-14 1991-03-11 Neste Oy Plastform med metallyta och foerfarande foer framstaellning av denna.
DE4325606A1 (de) 1993-07-30 1995-02-09 Bach Wolfdietrich Keramisches Heizelement sowie Verfahren zur Herstellung eines solchen Heizelements
DE19825223C2 (de) * 1998-06-05 2000-11-30 Fraunhofer Ges Forschung Formwerkzeug und Verfahren zu dessen Herstellung
AU5438800A (en) 1999-03-10 2000-10-04 Southern Research Institute Heated tooling apparatus and method for processing composite and plastic material
DE19942364C2 (de) 1999-09-06 2001-07-12 Karlsruhe Forschzent Werkzeug zum Warmumformen beim Prägeformprozess
WO2003035351A1 (fr) * 2001-10-26 2003-05-01 Sook-Jia Yim Procede permettant de chauffer momentanement la surface d'un moule et systeme associe
US6861021B2 (en) * 2002-04-16 2005-03-01 General Electric Company Molding tool construction and molding method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4912286A (en) * 1988-08-16 1990-03-27 Ebonex Technologies Inc. Electrical conductors formed of sub-oxides of titanium
WO1991007068A1 (fr) * 1989-10-31 1991-05-16 Dr. Peter Nesvadba Gesellschaft M.B.H. Dispositif de chauffage autoregulateur
EP0635993A2 (fr) * 1993-07-20 1995-01-25 TDK Corporation Elément chauffant céramique
EP1341216A1 (fr) * 2000-12-05 2003-09-03 Ibiden Co., Ltd. Substrat ceramique pour dispositifs de production et de controle de semi-conducteurs et procede de production dudit substrat ceramique
WO2005018908A2 (fr) * 2003-08-16 2005-03-03 Krauss-Maffei Kunststofftechnik Gmbh Outil chauffable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130233476A1 (en) * 2010-08-27 2013-09-12 Alliant Techsystems Inc. Out-of-autoclave and alternative oven curing using a self heating tool
EP2907881B1 (fr) 2014-02-07 2019-04-24 Benteler Automobiltechnik GmbH Ligne de moulage à chaud et procédé de fabrication de produits de tôle moulés à chaud
EP2907881B2 (fr) † 2014-02-07 2021-11-10 Benteler Automobiltechnik GmbH Ligne moulée à chaud et procédé de fabrication de produits de tôle moulés à chaud

Also Published As

Publication number Publication date
DE102007010099A1 (de) 2008-09-04

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