EP0433227B1 - Formwerkzeug für die Ausbildung von Zapfenlöchern in einer Anode - Google Patents

Formwerkzeug für die Ausbildung von Zapfenlöchern in einer Anode Download PDF

Info

Publication number
EP0433227B1
EP0433227B1 EP90810937A EP90810937A EP0433227B1 EP 0433227 B1 EP0433227 B1 EP 0433227B1 EP 90810937 A EP90810937 A EP 90810937A EP 90810937 A EP90810937 A EP 90810937A EP 0433227 B1 EP0433227 B1 EP 0433227B1
Authority
EP
European Patent Office
Prior art keywords
cover plate
stop
forming body
shaping tool
anode
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
EP90810937A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0433227A3 (en
EP0433227A2 (de
Inventor
Giovanni Bison
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.)
Polynt SpA
Original Assignee
Polynt SpA
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 Polynt SpA filed Critical Polynt SpA
Publication of EP0433227A2 publication Critical patent/EP0433227A2/de
Publication of EP0433227A3 publication Critical patent/EP0433227A3/de
Application granted granted Critical
Publication of EP0433227B1 publication Critical patent/EP0433227B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C25C3/12—Anodes
    • C25C3/125—Anodes based on carbon
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/01—Core positioning

Definitions

  • the invention relates to a molding tool for the formation of mortises in an anode according to the preamble of protection claim 1.
  • the anode material is filled into a mold into which the shaped bodies of the generally known generic molding tools for forming the pin holes project at predetermined positions. After filling and pressing such a "green" anode, the molds must be pulled out of the pin holes before they are fired.
  • the inclined grooves formed by the projections of the respective molded body in the wall of the mortise are retained when the molding tool is removed, since the molded body with the external projections can rotate freely about the holding axis.
  • the respective angular position of the projections after the removal of the molding tool is indefinite in that the molding can continue to rotate even after it has been freed from the anode.
  • the invention is therefore based on the object of forming the generic type with structurally simple means so that its projections always form the grooves in the wall of the pin hole in the same angular position with respect to the anode produced.
  • the configuration of the mold according to the invention ensures that the molded body can rotate when it is pulled out of the anode, the elastic means being tensioned, but without the pin holes being damaged. After pulling out of the anode, the shaped body is then rotated back into its starting position by the tensioned elastic means, in which it lies against the stop. Consequently, all the grooves formed by the projections of a shaped body in the wall of the pin holes of the anode are oriented identically in all the anodes produced, so that the grooves can be cleaned automatically in a simple manner.
  • the mold shown in FIGS. 1 to 3 has one Cover plate 10 on which a holding axis 12 is fastened at one end by means of fastening screws 48 which pass axially through the holding axis 12.
  • An essentially cylindrical shaped body 14 is rotatably mounted on the holding axis 12 by means of a lower and an upper radial bearing 16 or 18.
  • tangential projections 40 are provided with the same slope with respect to the axis of the molded body 14.
  • the outer race of the lower radial bearing 16 is held in the axial direction on the one hand by an inwardly extending bearing projection 46 of the molded body 14 and on the other hand by a bearing cover 20 screwed onto the molded body 14 on the side opposite the cover plate 10.
  • the inner race of the lower radial bearing 16 is supported on the one hand on a spacer ring 44 and on the other hand on a bearing collar 22 provided at the lower end of the holding axis 12.
  • the inner race of the upper radial bearing 18 is fixedly supported on the one hand by the spacer ring 44 and on the other hand by a spacer sleeve 42 which presses against the cover plate 10 with its other side.
  • the outer race of the upper radial bearing 18 lies on the bearing projection 46.
  • an upwardly open towards the cover plate 10 annular groove 24 is formed, which is concentric with the support axis 12.
  • a cover ring 28 likewise concentric with the holding axis 12, is inserted into the molded body 14.
  • the surface of the cover ring 28 is essentially flush with the surface of the molded body 14.
  • the cover ring 28 is connected to the cover plate in a rotationally fixed manner via a threaded pin 30.
  • the cover ring 28 is dimensioned such that the molded body 14 can rotate about the holding axis 12 and the cover ring 28 without jamming with it.
  • a coil spring 26 is arranged so that its ends are in the stop position of the molded body 14 diametrically opposite.
  • One end of the helical spring 26 is connected to the cover ring fixed to the cover plate 28 via a threaded pin 32, while the other end of the helical spring 26 is connected to the molded body 14 via a threaded bolt 34 screwed into the groove base 25 of the annular groove 24.
  • a stop 38 is provided in the cover ring 28, which is formed by one end of a circular ring segment concentric with the retaining axis 12.
  • a stop pin 36 attached to the groove base 25 of the annular groove 24 engages in the circular ring segment.
  • the stop pin 36 is biased by the tensile force of the coil spring 26 against the end of the circular ring segment facing the threaded pin 32.
  • the molded body 14 can, however, be rotated counter to the pulling direction of the helical spring 26 such that the stop pin 36 attached to it moves in the direction of the end of the circle segment opposite the stop 38, ie to the right in FIG. 2.
  • the molding tool When a "green" anode is pressed, the molding tool is inserted into a mold, the mold being closed at the top by the cover plate 10. After the pressing process, the cover plate 10 is lifted up together with the molded body 14. Because of the projections 40 on the circumferential wall of the molded body 14, which are inclined to its axis, the molded body 14 is guided by the grooves, which have become dimensionally stable during the pressing, against the direction of the tensile force of the helical spring 26, which is thereby further tensioned.
  • the molded body 14 is rotated back by the prestressed helical spring 26 until the stop pin 36 on the end of the circular segment facing the threaded pin 32, i.e. on the stop 38, is present.
  • the molded body 14 is now again in its stop position, in which the projections 40 are exactly the same angular position with respect to the anode to be pressed, as with the anode previously completed for firing.
  • the tensile force of the helical spring 26 is designed so that the grooves of the mortise formed by the shaped body 14 are not damaged when the shaped body 14 is pulled out of the anode and the shaped body 14 is rotated into its stop position after being pulled out of the anode.
  • the exemplary embodiment was explained using a shaped body 14. In the manufacture of anodes, however, it is customary to provide at least two pin holes which are formed in the manner described above by identical shaped bodies 14 which are rotatably fastened to the cover plate.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
EP90810937A 1989-12-07 1990-11-30 Formwerkzeug für die Ausbildung von Zapfenlöchern in einer Anode Expired - Lifetime EP0433227B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8914428U 1989-12-07
DE8914428U DE8914428U1 (de) 1989-12-07 1989-12-07 Formwerkzeug für die Ausbildung von Zapfenlöchern in einer Anode

Publications (3)

Publication Number Publication Date
EP0433227A2 EP0433227A2 (de) 1991-06-19
EP0433227A3 EP0433227A3 (en) 1991-08-21
EP0433227B1 true EP0433227B1 (de) 1994-03-09

Family

ID=6845269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810937A Expired - Lifetime EP0433227B1 (de) 1989-12-07 1990-11-30 Formwerkzeug für die Ausbildung von Zapfenlöchern in einer Anode

Country Status (7)

Country Link
US (1) US5078587A (is)
EP (1) EP0433227B1 (is)
CA (1) CA2031604A1 (is)
DE (2) DE8914428U1 (is)
ES (1) ES2050997T3 (is)
IS (1) IS1588B (is)
NO (1) NO178830C (is)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8197545B2 (en) 2005-10-27 2012-06-12 Depuy Spine, Inc. Nucleus augmentation delivery device and technique
US20070173935A1 (en) * 2005-10-28 2007-07-26 O'neil Michael J Nucleus pulposus augmentation pretreatment technique
US20120076888A1 (en) * 2010-09-28 2012-03-29 Cheng Uei Precision Industry Co., Ltd. Mould with the contact prepressing and positioning function

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US716343A (en) * 1901-05-08 1902-12-16 Fred M Locke Machine for forming the interior of plastic materials.
US1379328A (en) * 1920-04-09 1921-05-24 William J Baird Molding-machine
US3150222A (en) * 1961-05-16 1964-09-22 Phillips Petroleum Co Molding threaded articles
US3398081A (en) * 1966-04-05 1968-08-20 Pechiney Prod Chimiques Sa Prebaked carbon anodes and anode assembly for the production of aluminum
DE1937411B1 (de) * 1969-07-23 1971-09-16 Bard Martin Dipl Ing Befestigung zwischen einem anodenzapfen und einer kohlen stoffanode
US3730664A (en) * 1971-11-24 1973-05-01 Eyelet Specialty Co Mold apparatus for making a closure cap
US4268003A (en) * 1977-11-02 1981-05-19 Liautaud James P Mold core and method and apparatus for manufacture
US4842508A (en) * 1988-08-15 1989-06-27 Borislav Boskovic Core insert actuator

Also Published As

Publication number Publication date
EP0433227A3 (en) 1991-08-21
ES2050997T3 (es) 1994-06-01
NO178830C (no) 1996-06-12
NO178830B (no) 1996-03-04
DE8914428U1 (de) 1990-02-01
EP0433227A2 (de) 1991-06-19
DE59004906D1 (de) 1994-04-14
CA2031604A1 (en) 1991-06-08
IS1588B (is) 1996-03-01
NO905258L (no) 1991-06-10
IS3650A7 (is) 1991-06-08
US5078587A (en) 1992-01-07
NO905258D0 (no) 1990-12-05

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