EP1281459B1 - Procédé de thixomoulage par injection pour la fabrication de pièces métalliques - Google Patents

Procédé de thixomoulage par injection pour la fabrication de pièces métalliques Download PDF

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Publication number
EP1281459B1
EP1281459B1 EP02012651A EP02012651A EP1281459B1 EP 1281459 B1 EP1281459 B1 EP 1281459B1 EP 02012651 A EP02012651 A EP 02012651A EP 02012651 A EP02012651 A EP 02012651A EP 1281459 B1 EP1281459 B1 EP 1281459B1
Authority
EP
European Patent Office
Prior art keywords
composition
alloy
differing
use according
metal materials
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.)
Expired - Lifetime
Application number
EP02012651A
Other languages
German (de)
English (en)
Other versions
EP1281459A2 (fr
EP1281459A3 (fr
Inventor
Peter Hutmann
Katrin Dr. Ludwig
Robert Professor Dr. Singer
Mark Hartmann
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.)
Bayerische Motoren Werke AG
Neue Materialien Fuerth GmbH
Original Assignee
Bayerische Motoren Werke AG
Neue Materialien Fuerth 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 Bayerische Motoren Werke AG, Neue Materialien Fuerth GmbH filed Critical Bayerische Motoren Werke AG
Publication of EP1281459A2 publication Critical patent/EP1281459A2/fr
Publication of EP1281459A3 publication Critical patent/EP1281459A3/fr
Application granted granted Critical
Publication of EP1281459B1 publication Critical patent/EP1281459B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/007—Semi-solid pressure die casting

Definitions

  • the invention relates to the use of the thixotropic injection molding process for the production of metallic parts with improved properties and an apparatus for manufacturing such parts.
  • alloys in particular aluminum or magnesium alloys in an inert atmosphere fed to a screw extruder, the alloy under Heating and shearing to a temperature between the solidus temperature and the liquidus temperature in a thixotropic State of the screw is fed to a storage zone, off which she is ejected with the screw over the nozzle.
  • particulate metallic material in one Screw extruder while maintaining a temperature range between solidus and liquidus temperature and shear into a thixotropic state and from a storage zone to eject via a nozzle.
  • a particulate metallic Material can be two metallic materials be supplied to different composition, namely pure metals such as Al, Zn and Mg, or metal alloys such as AlZn as master alloy to a magnesium alloy.
  • pure metals such as Al, Zn and Mg
  • metal alloys such as AlZn as master alloy to a magnesium alloy.
  • pages 458 to 461 is the production of materials by mixing two semi-liquid alloys in known to a vessel.
  • the object of the invention is to improve the properties of Thixos injection molded metal parts to improve.
  • any components with graded alloy composition or composite materials, in particular coatings are produced.
  • the component can be a tough core of one Alloy and a hard wear-resistant surface from the have other alloy, so z.
  • B. a cylinder liner with a hard wear-resistant inner tread or a Rolling bearing ring with hard wear-resistant tread.
  • a plain bearing with a sliding surface be made of a soft alloy and with a Support structure of high strength.
  • the two metallic materials different Composition can be two different alloys or an alloy and a non-alloyed (pure) metal.
  • the both materials of different composition also be two unalloyed metals. If a mutual Solubility is excluded, forms the melting temperature of the lower melting metal the solidus temperature and the melting temperature of the higher melting metal the Liquidus temperature of the phase mixture.
  • the particulate metal alloys or the particulate metal is z. B. as granules or powder in front.
  • each metal alloy or each Metal used.
  • metal alloys with a low solidus and Liquidus temperature or pure metals with low Melting point preferred, the iron alloys do not attack.
  • alloys for example, magnesium, aluminum, Copper and zinc alloys and as pure metals for example, magnesium, aluminum, copper and zinc used.
  • the metallic materials of different composition be in an inert atmosphere the screw extruder supplied via at least one material feed opening, and the Material is heated and sheared to a temperature between the solidus temperature and the liquidus temperature heated and in the thixotropic state with the snail one Supplied from the storage zone, from which it is with the screw through the Nozzle or the like is ejected.
  • the snail is usually for ejection in the axial direction back and forth educated.
  • the particulate materials of different composition can first be mixed and then as a mixture the screw extruder be supplied. If the materials are different Composition alloys are, these are heated in the screw extruder to a temperature above the solidus and below the liquidus temperature of the Alloys lies. It should be noted that in the process z. By diffusion, convection and mixing changes the composition are possible.
  • magnesium is used as the base material, it can be used according to the invention without the existing in the melt metallurgy Limitations can be used as alloying elements: Alkali and alkaline earth metals, eg. As potassium, beryllium and Calcium, Group 2B elements of the Periodic Table, such as Zinc, Group 3, such as boron, Group 3A, such as yttrium, or the lanthanides, such as cerium, of group 4, such as silicon, the Group 4A, such as titanium, zirconium or hafnium, Group 5A, such as Vanadium, group 6A, such as chromium or molybdenum, as well as ferrous metals, especially iron.
  • Alkali and alkaline earth metals eg. As potassium, beryllium and Calcium
  • the alloy or Pure metal granules or powder to the screw extruder as well be supplied separately.
  • This can be a screw extruder be provided, each having a Materialzu 1500ö réelle for at least two materials of different composition having.
  • the Materialzu 1500ö réelleen can be axially offset be arranged, the alloy with the lower solidus temperature or the metal with the low melting point the worm can be fed at a location that the storage zone is closer than the location where the hitch is with the higher solidus temperature or the metal with is supplied to the higher melting point.
  • the material feed openings are in the same axial region at the material input end the snail, to the highest possible mixing and shearing to reach through the snail.
  • the at least two metallic materials of different composition can be converted via a respective screw extruder into the thixotropic state and ejected via a common nozzle.
  • the two screw extruders may have a common storage zone in which the semi-solid thixotropic metallic materials are mixed, which are formed in the respective screw extruder.
  • at least the screw of one of the screw extruders can be designed to be displaceable back and forth.
  • the amount of the respective metallic materials of different composition which are fed to one or, if several screw extruders are used, to each screw extruder can be controlled.
  • a metering device upstream for example a slider which is located between the feed opening in the extruder housing and a funnel for receiving the respective particulate metallic material can be provided.
  • a device with at least two screw extruders can be used, according to the inventive method also a coextrusion of at least two metallic materials different composition are performed.
  • each of the screw extruder a storage zone have, in which the respective metallic material in the thixotropic state accumulates.
  • the thixotropic materials can be moved back and forth from the storage zones Screws ejected through the nozzle or the injection mold become. The ejection can take place simultaneously, ie by coextrusion, but also alternately and / or with different Ratios of the materials used.
  • a device with at least two screw extruders can the screw extruder in the same way as in the Coextrusion of plastics, ie in tandem, for example, V-shaped to each other.
  • the nozzle may have a nozzle opening or a plurality of nozzle openings, for example, two coaxial annular openings, z. B. for producing a tube of two coaxial Layers of two metallic materials different Composition.
  • the inventive method can be any metal parts be prepared, e.g. Semi-finished products, such as profiles, tubes, Rods or plates or downstream of one of the nozzle Injection mold any molded parts can be obtained.
  • Semi-finished products such as profiles, tubes, Rods or plates or downstream of one of the nozzle Injection mold any molded parts can be obtained.
  • the Thixospritzg tellvoretti consists essentially from an extruder E with a housing 1, in the a screw 2 rotates. At one end of the screw 2 has the housing, as shown in Figure 2, in the same Axial Society two material feed openings 3 and 4, over each one alloy A and B as granules of a Funnels 5 and 6 are supplied. Between the funnels 5 and 6 and the feed ports 3, 4 is a slide 7, 8 for Metering of the screw 2 supplied alloy A and B provided.
  • integrated heater e.g., heater bands
  • the worm promoted alloys A and B on a Temperature between its solidus and liquidus temperature, in an inert atmosphere.
  • a nozzle 9 is provided at the end facing away from the Materialzuzhouö réelleen 3, 4 end of the housing 1, a nozzle 9 is provided. Between the Worm 2 and the nozzle 9 is the storage zone 11th That to a temperature between their solidus and liquidus temperature heated alloys A, B are from the Snail 2 in a semi-solid thixotropic state in the Storage zone 11 promoted.
  • the screw 2 is corresponding the arrow 12 back and forth movable to the semi-solid thixotropic material from the storage zone 11 through the Eject nozzle 9.
  • the supply of the alloys A, B can with the sliders 7, 8 z. B. be controlled so that the screw 2 initially only the alloy A is supplied, so that the nozzle 5 facing first area 13 in the storage zone 11 only from the Alloy A exists. If both slides 7, 8 then half open can, the middle or second area 14 z. B. consist of 50% of alloy A and 50% of alloy B, whereupon the slider 8 is closed so that the third, the worm 2 facing region 15 in the storage zone 11th again consists only of the alloy A.
  • the rod 11 may be formed by forging into that shown in FIG Component 17, for example, a piston rod transferred become.
  • a particularly wear-resistant Alloy A and a particularly tough mixture of alloys A and B thus becomes in the area of the eyes 17a and 17b get a high wear resistance range of the component and in the middle 17c between the two eyes a tougher, ductile area.
  • the Thixospritzg tellvortechnisch of Figure 5 has two screw extruder E1 and E2, which are arranged V-shaped to each other are.
  • Each screw extruder E1, E2 has one according to Arrows 21, 22 reciprocating worm 23, 24 and a storage zone 26, 27 between the injection mold 25 with the nozzle and each screw 23, 24.
  • the extruder E1 is e.g. the alloy A via the feed opening 3, and the extruder E2 e.g. the alloy B via the feed opening 4.
  • the storage zone 26 is the Alloy A supplied in thixotropic form, and the storage zone 27 the alloy B.
  • the nozzle 25 has a T-shaped profile. Between Storage zones 26, 27, a deflection 28 is provided, the the alloy A in the storage zone 26 to that of the vertical T-leg facing away from the crossbar of the T deflects, so that according to Figure 6, a T-shaped profile injection molded that is in the opposite of vertical T-beams Range consists of a mixture of alloys A and B, and otherwise from the alloy A.
  • the Thixospritzg smart rosettes beautiful invention can also be a Injection mold, to the two or more extruder screws are connected, such that in the injection mold Slider or the like shut-off provided are.
  • the injection mold can thus z. B. about the first Extruder screw or nozzle, the alloy A sprayed first and then after opening the slider in the tool over the second one Nozzle, the alloy B. That is, the inventive method can be similar to the 2-component injection molding of plastics be performed.

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

Claims (8)

  1. Mise en oeuvre du procédé de thixomoulage par injection, selon lequel au moins deux matériaux (A, B) métalliques en forme de particules d'une composition différente sont transférés à l'état thixotrope dans une extrudeuse à vis (E, E1, E2) par chauffage à une température entre les températures de solidus et de liquidus et cisaillement, et éjectés d'une zone d'accumulation (11, 26, 27) au moyen d'une filière (9, 25), pour fabriquer des composants présentant une composition d'alliages graduée.
  2. Mise en oeuvre selon la revendication A,
    caractérisée en ce qu'
    au moins deux matériaux métalliques (A, B) de composition différente sont constitués d'au moins deux alliages ou d'au moins un alliage et d'au moins un métal pur ou d'au moins deux métaux purs.
  3. Mise en oeuvre selon la revendication 1 ou 2,
    caractérisée en ce que
    les au moins deux matériaux métalliques (A, B) de composition différente sont amenés séparément dans l'extrudeuse à vis (E).
  4. Mise en oeuvre selon la revendication 3,
    caractérisée en ce que
    les au moins deux matériaux métalliques (A, B) sont amenés dans la zone d'accumulation (11) dans un rapport (A, A/B, A) variable.
  5. Mise en oeuvre selon la revendication 1 ou 2,
    caractérisée en ce que
    les au moins deux matériaux métalliques (A, B) de composition différente sont transférés par respectivement une extrudeuse à vis (E1, E2) dans l'état thixotrope puis éjectés par une filière (25) commune.
  6. Mise en oeuvre selon la revendication 5,
    caractérisée en ce que
    les au moins deux matériaux métalliques de composition différente sont éjectés par la filière (25) commune de respectivement une zone d'accumulation (26, 27).
  7. Mise en oeuvre selon l'une quelconque des revendications 3 à 6,
    caractérisée en ce que
    la quantité des au moins deux matériaux métalliques de composition différente, qui sont amenés dans l'extrudeuse à vis (E) ou les extrudeuses à vis (E1, E2), est respectivement réglable.
  8. Mise en oeuvre selon la revendication 6,
    caractérisée en ce que
    les au moins deux matériaux métalliques de composition différente sont co-extrudés par la filière (25) commune.
EP02012651A 2001-07-19 2002-06-07 Procédé de thixomoulage par injection pour la fabrication de pièces métalliques Expired - Lifetime EP1281459B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10135198A DE10135198A1 (de) 2001-07-19 2001-07-19 Verfahren und Vorrichtung zum Thixospritzgießen metallischen Materials und Anwendung des Verfahrens
DE10135198 2001-07-19

Publications (3)

Publication Number Publication Date
EP1281459A2 EP1281459A2 (fr) 2003-02-05
EP1281459A3 EP1281459A3 (fr) 2003-10-01
EP1281459B1 true EP1281459B1 (fr) 2004-11-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02012651A Expired - Lifetime EP1281459B1 (fr) 2001-07-19 2002-06-07 Procédé de thixomoulage par injection pour la fabrication de pièces métalliques

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EP (1) EP1281459B1 (fr)
DE (2) DE10135198A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502004000022D1 (de) * 2003-01-14 2005-08-25 Neue Materialien Fuerth Gmbh Verfahren zur Herstellung von Gussstücken aus einer Legierung durch Spritzgiessen
DE10301363A1 (de) * 2003-01-14 2004-07-22 Neue Materialien Fürth GmbH Verfahren und Vorrichtung zur Herstellung von Gussstücken aus einer Legierung durch Spritzgießen
DE10352453A1 (de) 2003-11-07 2005-06-02 Volkswagen Ag Verfahren zur Herstellung von Metall-Matrix-Verbundwerkstoffen
US20060283529A1 (en) * 2005-06-17 2006-12-21 Amit Ghosh Apparatus and Method of Producing Net-Shaped Components from Alloy Sheets
SE0701358L (sv) * 2007-06-01 2008-10-07 Skf Ab En lagerkomponent för ett rullningslager eller ett glidlager
DE102007057588A1 (de) * 2007-11-28 2009-06-04 Daimler Ag Motorblock mit eingegossenen Zylinderlaufbuchsen mehrerer Materiallagen und Verfahren zur Herstellung der Zylinderlaufbuchsen
DE102009032319A1 (de) 2009-07-09 2011-01-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Extruder zur Herstellung eines Bauteils aus Leichtmetall sowie Verwendung eines solchen Extruders
DE102009032320B4 (de) 2009-07-09 2019-12-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zum Spritzgießen eines Bauteils
DE102009033532B4 (de) 2009-07-10 2020-11-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Extruder zur Herstellung eines Bauteils aus Leichtmetall

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5525374A (en) * 1992-09-17 1996-06-11 Golden Technologies Company Method for making ceramic-metal gradient composites
JP3817786B2 (ja) * 1995-09-01 2006-09-06 Ｔｋｊ株式会社 合金製品の製造方法及び装置
US5983978A (en) * 1997-09-30 1999-11-16 Thixomat, Inc. Thermal shock resistant apparatus for molding thixotropic materials
DE19907118C1 (de) * 1999-02-19 2000-05-25 Krauss Maffei Kunststofftech Spritzgießvorrichtung für metallische Werkstoffe

Also Published As

Publication number Publication date
DE10135198A1 (de) 2003-02-06
EP1281459A2 (fr) 2003-02-05
EP1281459A3 (fr) 2003-10-01
DE50201441D1 (de) 2004-12-09

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