EP1733825B1 - Procédé de replissage de moules pour fabriquer de noyeaux de fonderie asymétriques d'un matériel compressible - Google Patents

Procédé de replissage de moules pour fabriquer de noyeaux de fonderie asymétriques d'un matériel compressible Download PDF

Info

Publication number
EP1733825B1
EP1733825B1 EP06012338A EP06012338A EP1733825B1 EP 1733825 B1 EP1733825 B1 EP 1733825B1 EP 06012338 A EP06012338 A EP 06012338A EP 06012338 A EP06012338 A EP 06012338A EP 1733825 B1 EP1733825 B1 EP 1733825B1
Authority
EP
European Patent Office
Prior art keywords
pressing die
pressing
core
filling
dosing device
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.)
Not-in-force
Application number
EP06012338A
Other languages
German (de)
English (en)
Other versions
EP1733825A1 (fr
Inventor
Norman Dipl.-Ing. Thiel
Manfred Dipl.-Ing. Laudenklos
Michael Dipl.-Ing. Winandi
Peter Dipl.-Ing. Everwin
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.)
KS Kolbenschmidt GmbH
KS Huayu Alutech GmbH
Original Assignee
KS Aluminium Technologie GmbH
KS Kolbenschmidt 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 KS Aluminium Technologie GmbH, KS Kolbenschmidt GmbH filed Critical KS Aluminium Technologie GmbH
Publication of EP1733825A1 publication Critical patent/EP1733825A1/fr
Application granted granted Critical
Publication of EP1733825B1 publication Critical patent/EP1733825B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/103—Multipart cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
    • B22C15/245—Blowing tubes

Definitions

  • the invention relates to a method for filling pressing tools for producing casting cores (lost cores) according to the features of the preamble of claim 1.
  • the prior art is the filling of pressing tools such that by means of a metering device (also called dosing cavity) a defined (certain) amount of material to be pressed on or in the pressing tool on or is applied.
  • the pressing tool has, for example, a planar tool base plate with an integrated lower tool part, wherein the material to be pressed is moved by means of the metering device on the planar tool base plate with the integrated tool lower part. The lower part of the tool is completely filled with the material. The amount of material is then pushed down, for example by means of a slider from the flat base plate and into a material storage for further use attributed.
  • the invention is therefore based on the object to provide a method for filling of pressing tools for the production of casting cores made of a compressible material, which avoids the disadvantages described above.
  • the object is therefore in particular in the realization of a suitable filling of pressing tools for the production of casting cores with in particular asymmetrical shapes whose cross section is variable over the circumference and / or extent or along an axis through the centroids of a compressible core material, in such that the pressing tool is filled with core material so that density differences in any asymmetric compacts after the pressing process are no longer present or at least acceptably low and that a required dimensional stability and strength of the casting core is achieved.
  • the pressing tool is designed for producing an asymmetric casting core, wherein the metering introduces certain subsets of compressible material at different locations in the pressing tool and then the material located in the pressing tool is finished pressed.
  • the metering introduces certain subsets of compressible material at different locations in the pressing tool and then the material located in the pressing tool is finished pressed.
  • the diaphragm which forms the lower boundary of the dosing cavity, is removed and the amount of material required at this location trickles to the intended location in the pressing tool.
  • a material release aid in Dosierkavtician, which largely corresponds to the negative mold of Dosierkavtician, or otherwise a pressure to exercise on the contents of the dosing cavity.
  • the material release aid (for example in the form of a pressurized stamp) is thus shaped so that any adhering residues on the dosing cavity can be pushed out of the dosing cavity with the aperture removed, thus completely filling the pressing tool.
  • a second variant of the same filling method is that the metering cavity is designed to be closed at the bottom and that after predosing, that is to say after filling the metering cavity and pushing away the excess amount of material for the casting core, a cover plate closes the metering cavity at the top. Thereafter, the rotating bearing system consisting of dosing cavity and aperture is rotated by 180 °. Subsequently, the cover panel is removed and the released (free-flowing) material falls in the required amount required to the respective location in the pressing tool, in particular in the lower tool part.
  • the downstream filling and pressing process in a suitable pressing tool with corresponding metering cavities compacts in a second production step the advanced symmetrical core blank to the finished pressed asymmetric casting core.
  • the advanced core blank differs from the finished core essentially in the features that the axial height is greater, the density is lower and the strength is lower. Only the finished molded core has, in particular in the circumferential direction, the desired asymmetrical shape with the desired homogeneous density or material distribution and the resulting corresponding strength.
  • the casting core consists of two or more parts, wherein at least one part, preferably all parts, is produced according to one of the methods of the preceding claims and the parts are subsequently joined together.
  • the casting core consists of two parts, wherein more than two parts are not excluded.
  • the two prefabricated G tellkernmaschine a symmetrical shape, which is only after their connection with each other to an asymmetrical shape of the then finished casting core.
  • the pressing tool on its underside is at least partially stepped (ie asymmetrical) and has side walls, wherein the metering device fills the pressing tool with material and the filled pressing tool is withdrawn with a slider to level.
  • the base is slightly lowered with the staircase shape in the parallel side walls and the top (the upper strand) is placed with the opposite steps, in particular by short reversing rotational movements, the upper part (Obertrumm) in the pressing tool by the compressible material is pressed into the staircase forms of Obertrumms.
  • the cores are lost cores for producing cavities (cooling channels and the like) in pistons for internal combustion engines with closed or open ring-like shapes whose cross-section is variable over the circumference or along the axis by the centroids of compressible Core material, such that the pressing tool is filled with core material so that density differences in any asymmetric casting cores after the pressing process are acceptably low and that the required dimensional stability and strength of the core is achieved.
  • the invention therefore, arbitrarily shaped asymmetric cooling channel shapes of cooling channel pistons of internal combustion engines with very low density differences and the required high strength can be realized in particular.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)

Claims (8)

  1. Procédé de remplissage d'outils de presse destiné à fabriquer des noyaux asymétriques de fonderie en un matériau compressible, dans lequel un dispositif de dosage apporte une quantité prédéterminée de matériau dans l'outil de presse, le dispositif de dosage apportant par portions des quantités partielles différentes et définies de matériau en différents endroits de l'outil de presse, le matériau présent dans l'outil de presse subissant ensuite sa compression finale.
  2. Procédé de remplissage d'outils de presse en vue de la fabrication de noyaux asymétriques de fonderie en un matériau compressible, dans lequel un dispositif de dosage apporte une quantité définie de matériau dans l'outil de presse, une ébauche préfabriquée de noyau de fonderie étant placée dans l'outil de presse et le dispositif de dosage remplissant ensuite l'outil de presse par portions de quantités partielles définies et différentes de matériau en différents emplacements, le matériau présent dans l'outil de presse et l'ébauche subissant ensuite leur compression finale.
  3. Procédé selon les revendications 1 ou 2, caractérisé en ce que le noyau de fonderie est constitué de deux ou plusieurs parties, au moins une partie et de préférence toutes les parties étant fabriquées en utilisant un procédé selon les revendications précédentes, les parties étant ensuite reliées les unes aux autres pour former un noyau de fonderie prêt à l'emploi.
  4. Procédé selon la revendication 3, caractérisé en ce que les parties sont collées les unes aux autres.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que le côté inférieur de l'outil de presse (brin inférieur) est en partie configuré en escalier et présente des parois latérales, le dispositif de dosage remplissant l'outil de presse de matériau compressible et l'outil de presse rempli étant abaissé à niveau par un poussoir.
  6. Procédé selon la revendication 5, caractérisé en ce que la surface de base de l'outil de presse à forme en escalier est abaissée dans les parois latérales parallèles, la partie supérieure (brin supérieur) qui présente des gradins identiques en escalier étant placée, le matériau compressible étiré en un plan étant repoussé dans les empreintes en escalier de la partie supérieure, en particulier par un court déplacement réversible de rotation de la partie supérieure dans le moule.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que de l'énergie est appliquée de l'extérieur sur le matériau compressible, en particulier le mélange de sel et de liant, par exemple par vibration, ultrasons ou similaires.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que le procédé est utilisé pour fabriquer des noyaux de fonderie destinés à être utilisés dans la fabrication d'espaces creux de composants de moteurs à combustion interne.
EP06012338A 2005-06-15 2006-06-14 Procédé de replissage de moules pour fabriquer de noyeaux de fonderie asymétriques d'un matériel compressible Not-in-force EP1733825B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005027541 2005-06-15

Publications (2)

Publication Number Publication Date
EP1733825A1 EP1733825A1 (fr) 2006-12-20
EP1733825B1 true EP1733825B1 (fr) 2007-11-07

Family

ID=36999885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06012338A Not-in-force EP1733825B1 (fr) 2005-06-15 2006-06-14 Procédé de replissage de moules pour fabriquer de noyeaux de fonderie asymétriques d'un matériel compressible

Country Status (3)

Country Link
EP (1) EP1733825B1 (fr)
AT (1) ATE377469T1 (fr)
DE (1) DE502006000166D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013007735B4 (de) * 2012-05-08 2015-10-15 Audi Ag Verfahren zum Herstellen eines gussgeeigneten Salzkerns
DE102012022390B3 (de) * 2012-11-15 2014-04-03 Audi Ag Verfahren zur kalten Herstellung eines Salzkerns für das Druckgießen
DE102013009055B4 (de) * 2013-05-28 2018-10-31 Audi Ag Werkzeug und Verfahren zur Herstellung von Salzkernen für das Druckgießen von Metallen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04143043A (ja) * 1990-10-04 1992-05-18 Hitachi Metals Ltd 鋳型の造型方法及び装置
JP3027257B2 (ja) * 1992-02-25 2000-03-27 マツダ株式会社 中子接着方法及びその装置
JP3409531B2 (ja) * 1995-08-22 2003-05-26 いすゞ自動車株式会社 鋳型用組立中子
JPH09239490A (ja) * 1996-03-08 1997-09-16 Sintokogio Ltd 鋳物砂の押し寄せ装置
JPH09271898A (ja) * 1996-04-05 1997-10-21 Sintokogio Ltd 鋳物砂均らし装置

Also Published As

Publication number Publication date
EP1733825A1 (fr) 2006-12-20
DE502006000166D1 (de) 2007-12-20
ATE377469T1 (de) 2007-11-15

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