EP0013747B1 - Appareil de filage en continu de matériaux granulés électroconducteurs, de préférence de poudre métallique - Google Patents

Appareil de filage en continu de matériaux granulés électroconducteurs, de préférence de poudre métallique Download PDF

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Publication number
EP0013747B1
EP0013747B1 EP79105276A EP79105276A EP0013747B1 EP 0013747 B1 EP0013747 B1 EP 0013747B1 EP 79105276 A EP79105276 A EP 79105276A EP 79105276 A EP79105276 A EP 79105276A EP 0013747 B1 EP0013747 B1 EP 0013747B1
Authority
EP
European Patent Office
Prior art keywords
die
duct
electrically conductive
ring
strand
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
Application number
EP79105276A
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German (de)
English (en)
Other versions
EP0013747A1 (fr
Inventor
Klaus Lichtinghagen
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.)
Federal Mogul Deva GmbH
Original Assignee
Glacier GmbH Deva Werke
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 Glacier GmbH Deva Werke filed Critical Glacier GmbH Deva Werke
Priority to AT79105276T priority Critical patent/ATE6348T1/de
Publication of EP0013747A1 publication Critical patent/EP0013747A1/fr
Application granted granted Critical
Publication of EP0013747B1 publication Critical patent/EP0013747B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/26—Extrusion presses; Dies therefor using press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding

Definitions

  • the invention relates to a device for the continuous extrusion of electrically conductive, granulated, preferably powder-metallurgy materials, with a die pass channel for pushing through the material, a stamp for compacting and pushing the material in the pass channel and for pressing out the material strand via an end of the die flow channel arranged mouthpiece, and with a device for heating the material in the flow channel by electrical currents.
  • a device according to the preamble of the patent claim is known (DE-B-27 33 009), in which the respective powder metallurgical material to be processed is continuously extruded in a die pass channel, within a certain range in which the sintering of the compacted material should take place, an inductive heating of the material takes place.
  • the inductive eddy currents generated in this way for heating the already compacted strand of material mainly lead to the heating of the metal die flow channel used and are only generated to a small extent on the surface of the conductor strand.
  • the heating of the entire strand required for sintering thus takes place essentially purely by heat conduction from the die flow channel or from the outer surface of the strand into the interior of the strand.
  • the object of the invention is to improve such a device in such a way that, when it is used, processing of all electrically conductive materials enables heating of the strand located in the die flow channel to be achieved more uniformly over all conductor cross-sections and, moreover, one compared to inductive heating With decreasing degree of compaction of the strand of material, increasing heating of the same can be generated, and at the same time the outlay on equipment should be kept particularly low.
  • the wall of the Geserik flow channel consists of an electrically non-conductive material, in the middle of the wall of which an ring consisting of electrically conductive material is enclosed, the inner ring surface of which is flush with the inner surface of the die flow channel, and that this ring is connected to one pole and the mouthpiece to the other pole of a voltage source.
  • the device according to the invention takes advantage of the knowledge that electrically conductive materials such as metals, metalloids or so-called "second class conductors" (e.g. graphite) have a significantly increasing electrical resistance with decreasing density. This is due to the fact that as the density decreases, the contact points of neighboring particles become smaller and the current flowing is increasingly subjected to a higher resistance. The losses that occur are almost exclusively converted into thermal energy. Taking advantage of this knowledge, the device according to the invention compresses the powder metallurgical products used under pressure and at the same time acting temperature in such a way that the highest strengths and high density values result.
  • electrically conductive materials such as metals, metalloids or so-called "second class conductors" (e.g. graphite) have a significantly increasing electrical resistance with decreasing density. This is due to the fact that as the density decreases, the contact points of neighboring particles become smaller and the current flowing is increasingly subjected to a higher resistance. The losses that occur are almost exclusively converted into thermal energy.
  • a die flow channel with a wall made of electrically non-conductive material makes it possible to utilize the increasing inherent resistance of electrically conductive materials with decreasing density for the self-heating of the strand to be pressed, taking advantage of the high thermal pressure resistance of e.g. ceramics and their electrical insulation properties.
  • the temperature within the compacted strand drops sharply from the recessed ring to the mouthpiece because the highest compression is already present in the area of the mouthpiece and at the same time there is excellent contact closure.
  • a continuous flow of current is always ensured in the section of the material strand in the die flow channel, which is located between the ring and the mouthpiece. In many cases it will be advantageous to attach the ring approximately half the height of the die flow channel.
  • the invention is explained in more detail in principle by way of example with reference to the drawing.
  • the figure shows a basic cross section through a device according to the invention for producing a hollow strand.
  • a filler plate 1 is provided, to which a die is connected with a die pass channel 2, which is surrounded by an electrically non-conductive die 3, which in turn is supported radially on the outside via a support wall 6.
  • a mouthpiece 4 made of electrically conductive material is provided, which is connected to a pole of a voltage source (not shown).
  • a support ring 5 supports the mouthpiece 4 axially outwards.
  • a stamp arrangement which consists of a central mandrel 8a and an upper stamp 8b which radially surrounds it and can actually be displaced relative to the central mandrel 8a.
  • the upper punch 8b is fastened to an intermediate plate 10, while the central mandrel 8a extends upwards through the intermediate plate 10 and is fastened further to a head plate 9.
  • existing hardened steel guide bolts 13 are screwed in via thread 14. These guide bolts 13 serve to guide the intermediate plate during a movement relative to the head plate, furthermore disc springs 11 are arranged around the guide bolts 13, by means of which the head plate 9 and the intermediate plate 10 are held at a certain stroke distance from one another.
  • the spring force is designed so that after about 30% of the possible stroke between intermediate plate 10 and head plate 9, the required pressing force for the annular cross-section is reached and, with full indentation of the possible stroke, rise up to a maximum of 1.5 times the calculated compression pressure can.
  • the central mandrel 8a is made of steel, but is surrounded by a ceramic sleeve 15 within the sintering and compression area of the material in the die. This achieves electrical insulation with high inherent strength under temperature.
  • the steel core 16 within the ceramic sleeve 15 can be equipped with additional cooling to maintain its inherent strength, for which purpose any conventional, suitable cooling is suitable.
  • a ring 21 is embedded, which is shown in dashed lines in the figure.
  • This ring 21 is connected via a suitable connection 22 to one pole of a voltage source, with the other pole of which the mouthpiece 4 is connected.
  • the ring 21 is attached approximately at half the height of the die 3, in order to ensure a continuous flow of current within the material strand section still remaining in the die even when the upper die 8b moves out of the die.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Conductive Materials (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Claims (1)

  1. Dispositif d'extrusion continue de matières électriquement conductrices, granulées, de préférence des métaux à fritter, comportant un canal de passage de matrice (2) pour faire passer la matière, un poinçon (8a, 8b) pour densifier et continuer à faire avancer la matière dans le canal de passage et faire sortir le boudin d'extrusion (18) par un embouchure (4) placée à l'extrémité du canal de passage (2), et comportant un dispositif pour chauffer la matière (7) se trouvant dans le canal de passage par des courants électriques, caractérisé en ce que la paroi (3) du canal de passage (2) est en un matériau électriquement non-conducteur, dans lequel est inséré dans la zone centrale de la paroi (3), un anneau (21) en matériau électriquement conducteur dont la surface annulaire intérieure affleure avec la surface intérieure du canal de passage (2), et en ce que cet anneau (21) est relié à l'un des pôles d'une source de tension, tandis que l'embouchure (4) est reliée à l'autre pôle.
EP79105276A 1979-01-30 1979-12-19 Appareil de filage en continu de matériaux granulés électroconducteurs, de préférence de poudre métallique Expired EP0013747B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79105276T ATE6348T1 (de) 1979-01-30 1979-12-19 Vorrichtung zum kontinuierlichen strangpressen elektrisch-leitfaehiger, granulierter, vorzugsweise pulvermetallurgischer werkstoffe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2903510 1979-01-30
DE2903510A DE2903510C2 (de) 1979-01-30 1979-01-30 Verfahren und Vorrichtung zum kontinuierlichen Strangpressen elektrisch-leitfähiger granulierter, vorzugsweise pulvermetallurgischer Werkstoffe

Publications (2)

Publication Number Publication Date
EP0013747A1 EP0013747A1 (fr) 1980-08-06
EP0013747B1 true EP0013747B1 (fr) 1984-02-22

Family

ID=6061737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79105276A Expired EP0013747B1 (fr) 1979-01-30 1979-12-19 Appareil de filage en continu de matériaux granulés électroconducteurs, de préférence de poudre métallique

Country Status (10)

Country Link
US (2) US4380473A (fr)
EP (1) EP0013747B1 (fr)
JP (1) JPS5834523B2 (fr)
AT (1) ATE6348T1 (fr)
CS (1) CS222170B2 (fr)
DD (1) DD160099A5 (fr)
DE (1) DE2903510C2 (fr)
SE (1) SE7910582L (fr)
SU (1) SU1050552A3 (fr)
ZA (1) ZA8091B (fr)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601650A (en) * 1983-08-17 1986-07-22 Exxon Research And Engineering Co. Extrusion die for extruding metallic powder material
DE3511452A1 (de) * 1985-03-29 1986-10-09 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und vorrichtungen zur herstellung von glaskoerpern
DE3511450A1 (de) * 1985-03-29 1986-10-02 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und vorrichtung zur herstellung von glaskoerpern mittels strangpressen
JPS6296603A (ja) * 1985-10-22 1987-05-06 Honda Motor Co Ltd 耐熱高強度Ａｌ焼結合金製構造用部材の製造方法
US5265545A (en) * 1989-04-12 1993-11-30 Miltox Holdings Pte, Limited Method and apparatus for waste treatment
US5403540A (en) * 1990-10-29 1995-04-04 Corning Incorporated Heating of formed metal structure by induction
US6432554B1 (en) 1992-02-10 2002-08-13 Iap Research, Inc. Apparatus and method for making an electrical component
US6273963B1 (en) 1992-02-10 2001-08-14 Iap Research, Inc. Structure and method for compaction of powder-like materials
US5310476A (en) * 1992-04-01 1994-05-10 Moltech Invent S.A. Application of refractory protective coatings, particularly on the surface of electrolytic cell components
US5651874A (en) * 1993-05-28 1997-07-29 Moltech Invent S.A. Method for production of aluminum utilizing protected carbon-containing components
US6001236A (en) * 1992-04-01 1999-12-14 Moltech Invent S.A. Application of refractory borides to protect carbon-containing components of aluminium production cells
JP2938676B2 (ja) * 1992-06-05 1999-08-23 日立粉末冶金株式会社 粉末材料の押し出し成形方法およびその成形装置
US5837632A (en) * 1993-03-08 1998-11-17 Micropyretics Heaters International, Inc. Method for eliminating porosity in micropyretically synthesized products and densified
US5544194A (en) * 1993-06-09 1996-08-06 Leybold Durferrit Gmbh Apparatus for degreasing electrically conductive material
DE4319166C2 (de) * 1993-06-09 2002-02-14 Ald Vacuum Techn Ag Verfahren und Vorrichtung zur Reinigung, insbesondere Entfettung und Kompaktierung von elektrisch leitfähigem Gut
WO1996007773A1 (fr) * 1994-09-08 1996-03-14 Moltech Invent S.A. Cellule d'extraction electrolytique d'aluminium comportant des blocs cathodiques ameliores en carbone
US7732243B2 (en) * 1995-05-15 2010-06-08 Daniel Luch Substrate structures for integrated series connected photovoltaic arrays and process of manufacture of such arrays
US5753163A (en) * 1995-08-28 1998-05-19 Moltech. Invent S.A. Production of bodies of refractory borides
US7362015B2 (en) * 1996-07-29 2008-04-22 Iap Research, Inc. Apparatus and method for making an electrical component
US6811887B2 (en) 1996-07-29 2004-11-02 Iap Research, Inc. Apparatus and method for making an electrical component
US6612826B1 (en) * 1997-10-15 2003-09-02 Iap Research, Inc. System for consolidating powders
US6868778B2 (en) 2001-09-14 2005-03-22 Iap Research, Inc. System and method for loading a plurality of powder materials in an electromagnetic compaction press
US7033156B2 (en) * 2002-04-11 2006-04-25 Luka Gakovic Ceramic center pin for compaction tooling and method for making same
US7214046B2 (en) * 2002-04-11 2007-05-08 Luka Gakovic Ceramic center pin for compaction tooling and method for making same
US8312612B2 (en) * 2002-04-11 2012-11-20 Blue Sky Vision Partners, Llc Refurbished punch tip and method for manufacture and refurbishing
US20050001499A1 (en) * 2003-07-01 2005-01-06 Litton Systems, Inc. Permanent magnet rotor for brushless D.C. motor
KR20130101104A (ko) 2010-11-04 2013-09-12 쓰리엠 이노베이티브 프로퍼티즈 컴파니 필터 요소를 형성하는 방법
US20140191444A1 (en) * 2013-01-10 2014-07-10 Koslow Technologies Corporation Apparatuses and methods for extruding a block product from a feed material
CN106964778A (zh) * 2016-01-14 2017-07-21 罗伯特·博世有限公司 生产热变形磁体的方法和设备
CN108326313B (zh) * 2017-12-25 2021-10-01 新疆烯金石墨烯科技有限公司 一种制备合金导线的连续挤压装置
CN117849888B (zh) * 2024-03-08 2024-06-04 山东省煤田地质局第三勘探队 一种地质勘探方法及系统

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760137A (en) * 1970-10-05 1973-09-18 Alps Electric Co Ltd Matrix push-button switch

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB231292A (en) * 1924-02-19 1925-04-02 Carl Heinrich Fischer Improved manufacture of ductile metals from refractory metals
US1896854A (en) * 1930-06-19 1933-02-07 Gen Electric Apparatus for making hard metal compositions
US2097502A (en) * 1933-03-18 1937-11-02 Union Carbide & Carbon Corp Method of and apparatus for producing rods and the like of comminuted material
US2289787A (en) * 1937-12-24 1942-07-14 Kaschke Kurt Production of shaped articles from metal powder
US2372605A (en) * 1941-11-04 1945-03-27 Fellows Gear Shaper Co Method and apparatus for making solid objects from metal powder
US2834674A (en) * 1951-06-30 1958-05-13 Silvasy Method of making strip
US2708770A (en) * 1952-11-20 1955-05-24 Allegheny Ludlum Steel Apparatus for making continuous electrode sticks
US2975893A (en) * 1955-04-21 1961-03-21 Herbert G Johnson Apparatus for consolidating particulate materials continuously without melting
US2902714A (en) * 1955-08-23 1959-09-08 Herbert G Johnson Rod extrusion press
GB833513A (en) * 1955-11-09 1960-04-27 Edelstahlwerk Ag Deutsche A method of heating and chemically reacting pulverulent raw materials and an apparatus for performing the same
US2906596A (en) * 1955-11-09 1959-09-29 Deutsche Edelstahlwerke Ag Method of processing pulverulent raw materials and an apparatus for performing the same
US3122434A (en) * 1960-06-03 1964-02-25 Republic Steel Corp Continuous process of producing strips and sheets of ferrous metal directly from metal powder
US3340052A (en) * 1961-12-26 1967-09-05 Inoue Kiyoshi Method of electrically sintering discrete bodies
US3264388A (en) * 1962-02-02 1966-08-02 Kaiser Aluminium Chem Corp Method of continuously hot pressing powdered refractory material
US3284372A (en) * 1965-09-14 1966-11-08 Great Lakes Carbon Corp Apparatus and process for continuously making baked and graphitized carbon bodies
US3656946A (en) * 1967-03-03 1972-04-18 Lockheed Aircraft Corp Electrical sintering under liquid pressure
JPS5338900B2 (fr) * 1972-06-26 1978-10-18
JPS53133510A (en) * 1977-04-26 1978-11-21 Inoue Japax Res Inc Sintering apparatus for long-sized material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760137A (en) * 1970-10-05 1973-09-18 Alps Electric Co Ltd Matrix push-button switch

Also Published As

Publication number Publication date
ZA8091B (en) 1980-12-31
JPS5834523B2 (ja) 1983-07-27
SU1050552A3 (ru) 1983-10-23
DE2903510B1 (de) 1980-08-07
DE2903510C2 (de) 1981-06-25
DD160099A5 (de) 1983-05-04
US4380473A (en) 1983-04-19
SE7910582L (sv) 1980-07-31
CS222170B2 (en) 1983-05-27
US4420294A (en) 1983-12-13
ATE6348T1 (de) 1984-03-15
JPS55131105A (en) 1980-10-11
EP0013747A1 (fr) 1980-08-06

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