EP1706515B1 - Dispositif de melange - Google Patents

Dispositif de melange Download PDF

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Publication number
EP1706515B1
EP1706515B1 EP05700317A EP05700317A EP1706515B1 EP 1706515 B1 EP1706515 B1 EP 1706515B1 EP 05700317 A EP05700317 A EP 05700317A EP 05700317 A EP05700317 A EP 05700317A EP 1706515 B1 EP1706515 B1 EP 1706515B1
Authority
EP
European Patent Office
Prior art keywords
elevation
channel
measuring device
mixing
feed channel
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
EP05700317A
Other languages
German (de)
English (en)
Other versions
EP1706515A1 (fr
Inventor
Benno Niedermann
Jörg Frei
Ulrich Binder
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.)
Buehler Druckguss AG
Original Assignee
Buehler Druckguss AG
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 Buehler Druckguss AG filed Critical Buehler Druckguss AG
Publication of EP1706515A1 publication Critical patent/EP1706515A1/fr
Application granted granted Critical
Publication of EP1706515B1 publication Critical patent/EP1706515B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/08—Alloys with open or closed pores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/005—Casting metal foams
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/08—Alloys with open or closed pores
    • C22C1/083—Foaming process in molten metal other than by powder metallurgy
    • C22C1/086—Gas foaming process

Definitions

  • the invention relates to a mixing device, in particular for mixing light metal melts with powdered or granular substances, preferably for mixing aluminum melt with a blowing agent.
  • a powder of a copper alloy is filled in a wire, and this is then supplied to a molten metal mass.
  • a powdery or granular substance is metered from a container into a molten metal, wherein the container has a downwardly tapering part, at the bottom of which at least one nozzle and above an ejector are provided.
  • the nozzle is connected to a carrier gas line and the ejector is connected to a mixture-carrying line.
  • a gas stream is passed continuously and independently of solids into a mixing chamber.
  • the solids are carried into the interior of a molten metal, wherein between the feed line and molten metal, a rotational movement is generated.
  • the DE-A-3612613 teaches a device in which a channel for molten pig iron has tuyeres or puffs.
  • the invention has for its object to provide a mixing device that allows an efficient mixing of a powdered blowing agent with an aluminum melt shortly before or during the filling of the melt in a die casting tool.
  • the solution of the problem is achieved with the features of the claim.
  • the invention is based on the recognition that it is suitable for the production of foamed metal bodies, in particular of integral foam, for example according to the WO-A-02/060621 is required, the propellant during the filling evenly to disperse in the melt and to achieve complete foaming in the mold.
  • This is achieved with the sprue channel designed according to the invention with mixing elements in a one-stage mixing and foaming process.
  • the mixing element has a multi-stage design and can be adapted to different volumes.
  • the runner is provided with an increase or constriction at which a back pressure arises, followed by a pressure drop.
  • the increase can be formed over the entire width (inner diameter) of the sprue or even partially filling.
  • the propellant is added by means of a hydraulic cylinder in the sprue with at least one pin to the liquid light metal stream, preferably in the center of the sprue. At least one more chicane can follow the increase or narrowing.
  • the elements of the mixing device and rearrangements in the molten metal flow cause a sufficient distribution of the blowing agent in the metal stream.
  • the powdered or granular substances may also other metals or ceramic particles u. a. include. Due to the blowing agent supply by means of mixers with respect. Way and time as a function of Griesskolbenweg a better process stability is achieved.
  • the mixer elements are exchangeable as a wear part.
  • the invention will be described below in an embodiment with reference to a drawing.
  • the drawing shows the mixing device in a runner.
  • a sprue 1 of a die-casting mold is internally provided with an elevation 4, which causes a constriction of the cross-section and thus a back pressure.
  • the elevation 4 three pin channels 2 open into the sprue.
  • two baffles 6 are spaced apart from the elevation 4. The flow rate of the melt stream is, according to the method, high.
  • the propellant is injected in the pin channels 2 at the same time by means of a cylinder 3 in the melt stream.
  • the pin channels 2 have an inner diameter depending on the size of the part to be cast.
  • the pin channels 2 can be arranged side by side or offset from each other.
  • the middle part 10 of the sprue 1 can be designed as a wear part easily replaceable.
  • the elevation 4 is formed as a hump or ramp, at which the melt flow, depending on the design of the elevation 4, can flow past the left and right or beyond it.
  • the different flow rates promote the mixing of the melt with the blowing agent.
  • the metal front is detected and converted into a signal, this signal serves as the basis for the automatic corrections for Giessprofil and retraction of / the cylinder 3 regardless of the amount of metal is filled.
  • the same sensor signal is used to complete the injection process before the cavity is 100% full.
  • the signals can be placed on the casting diagram for visualization and controlled there and can thus be assigned to a casting piston waypoint.
  • the invention is not limited to this specific embodiment.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Continuous Casting (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (6)

  1. Dispositif mélangeur, notamment pour mélanger des masses fondues de métaux légers avec des matières pulvérulentes ou granuleuses dans un conduit d'arrachage (1) d'un moule, le conduit d'arrachage (1) comportant à l'intérieur une élévation (4), à laquelle est associé au moins un conduit pour l'injection d'une matière pulvérulente ou granuleuse.
  2. Dispositif mélangeur selon la revendication 1, caractérisé en ce que l'élévation (4) est conçue sur toute la largeur du conduit d'arrachage (1).
  3. Dispositif mélangeur selon la revendication 1 ou 2, caractérisé en ce que trois broches (2) sont disposées pour l'injection de l'agent propulseur.
  4. Dispositif mélangeur selon au moins l'une quelconque des revendications 1 à 3, caractérisé en ce que le au moins un conduit pour l'injection est disposé dans l'élévation (4), de préférence sur le côté dirigé en aval.
  5. Dispositif mélangeur selon au moins l'une quelconque des revendications 1 à 4, caractérisé en ce que, en direction d'écoulement, au moins une chicane (6) fait suite à l'élévation (4) avec un écart.
  6. Dispositif mélangeur selon au moins l'une quelconque des revendications 1 à 5, caractérisé en ce que, un capteur de front métallique est disposé dans le conduit de coulée/conduit d'arrachage.
EP05700317A 2004-01-23 2005-01-18 Dispositif de melange Not-in-force EP1706515B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004003743A DE102004003743A1 (de) 2004-01-23 2004-01-23 Mischvorrichtung
PCT/CH2005/000022 WO2005071122A1 (fr) 2004-01-23 2005-01-18 Dispositif de melange

Publications (2)

Publication Number Publication Date
EP1706515A1 EP1706515A1 (fr) 2006-10-04
EP1706515B1 true EP1706515B1 (fr) 2007-07-18

Family

ID=34745095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05700317A Not-in-force EP1706515B1 (fr) 2004-01-23 2005-01-18 Dispositif de melange

Country Status (5)

Country Link
EP (1) EP1706515B1 (fr)
AT (1) ATE367454T1 (fr)
DE (2) DE102004003743A1 (fr)
ES (1) ES2289686T3 (fr)
WO (1) WO2005071122A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007001780A1 (de) 2007-01-05 2008-07-10 Bühler Druckguss AG Verfahren zur Herstellung von faserverstärkten Druckgiessteilen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1164102B (de) * 1956-03-19 1964-02-27 Lor Corp Verfahren zur Herstellung von Metallschaumkoerpern
DE10104338A1 (de) * 2001-02-01 2002-08-08 Goldschmidt Ag Th Herstellung flächiger, metallischer Integralschäume
DE10104339A1 (de) * 2001-02-01 2002-08-08 Goldschmidt Ag Th Verfahren zur Herstellung von Metallschaum und danach hergestellter Metallkörper

Also Published As

Publication number Publication date
ES2289686T3 (es) 2008-02-01
WO2005071122A1 (fr) 2005-08-04
DE502005001055D1 (de) 2007-08-30
ATE367454T1 (de) 2007-08-15
EP1706515A1 (fr) 2006-10-04
DE102004003743A1 (de) 2005-08-11

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