EP0581170A1 - Moule de grille pour coulée des grilles d'accumulateur en plomb et procédé - Google Patents

Moule de grille pour coulée des grilles d'accumulateur en plomb et procédé Download PDF

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Publication number
EP0581170A1
EP0581170A1 EP93111610A EP93111610A EP0581170A1 EP 0581170 A1 EP0581170 A1 EP 0581170A1 EP 93111610 A EP93111610 A EP 93111610A EP 93111610 A EP93111610 A EP 93111610A EP 0581170 A1 EP0581170 A1 EP 0581170A1
Authority
EP
European Patent Office
Prior art keywords
metal oxide
casting mold
layer
lattice
mold according
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.)
Withdrawn
Application number
EP93111610A
Other languages
German (de)
English (en)
Inventor
Reinhold Wiedenmann
Karl-Christoph Dipl.-Ing. Berger
Eberhard Dr. Nann
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.)
Hagen Batterie AG
Original Assignee
Hagen Batterie 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 Hagen Batterie AG filed Critical Hagen Batterie AG
Publication of EP0581170A1 publication Critical patent/EP0581170A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/061—Materials which make up the mould
    • 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
    • B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
    • B22D25/04—Casting metal electric battery plates or the like
    • 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
    • Y10S164/00—Metal founding
    • Y10S164/01—Battery

Definitions

  • the invention relates to a grid mold for casting accumulator lead grids according to the preamble of claim 1 and a method for its production.
  • thermal insulation layer In order to produce accumulator lead grids in gravity casting, such grating molds made of steel and gray cast iron are generally used.
  • the geometry of the lead mesh to be produced is introduced into the base body by machining with a certain addition for the thermal insulating layer to be applied by compressed air spraying, which consists of cork flours with grain sizes ⁇ 200 mesh, which are coated with a binder, e.g. Water glass or relatin are offset.
  • the suspension of cork powder and binder is applied to the molded surface of the base body already provided with the casting profile using a spray device.
  • the layer thickness of the thermal insulation layer is approx. 0.15 mm.
  • the thermal insulation layer also fulfills the function of a mold release agent.
  • the mold temperature control which is necessary in order to achieve the corresponding production parameters, takes place through cooling channels provided in the base body, through which a suitable fluid is passed.
  • the casting mold is brought to the desired temperature level by means of additional heaters.
  • the lead grid is then poured and after a certain time the mold is cooled by introducing a coolant into the cooling channels.
  • the thermal insulation layer prevents the lead melt from solidifying too quickly.
  • the reason for the wear of the mold coating material is the high thermal load due to the operating temperature of the mold and the melt temperature as well as the flow rate of the liquid lead alloy.
  • the molds are made of two sheets of e.g. 30 to 50 mm thick. Cast iron with nodular graphite is also suitable as casting material or, for less demanding shapes, inexpensive and faster to obtain gray cast iron.
  • a method for producing a device for casting lead grids for electrical battery plates is already known (DE 35 29 725 A1, DE 36 03 657 A1), which contains a ceramic material, the surface of which forms the casting mold and is in direct contact with the mold Form incoming melting material stands, the ceramic material has a high porosity and is produced by flame spraying.
  • the flame-sprayed ceramic layer is adapted to the exact contour of the cast part by mechanical, material-removing processing.
  • An intermediate layer located between the base body and the metal oxide layer serves to promote adhesion.
  • a disadvantage of the known method is the lack of thermal insulation on the one hand and the need for mechanical reworking of the hard ceramic layer on the other hand.
  • the invention aims to create a further lattice mold for casting accumulator lead grids in the gravity or die casting process, which serve as a carrier for active materials in lead-acid batteries.
  • it is the object of the invention to create a lattice casting mold the thermal insulation layers of which do not have to be post-treated or renewed during the entire service life or period of use, nevertheless perfectly reproducible lead grids are to be produced during the entire service life of the casting mold, namely not significantly reduced casting cycle time.
  • the use or aftertreatment with release agents should also be avoided in the lattice casting mold according to the invention.
  • the metal oxide layers applied according to the invention by plasma spraying are characterized by high wear resistance and Dimensional stability.
  • the high-temperature fiber ceramic layer underneath also prevents the heat contained in the lead melt from being dissipated too quickly, as a result of which the lead melt is kept liquid longer.
  • the high-temperature fiber ceramic has the advantage that it can absorb the mechanical forces occurring during the subsequent application of the metal oxide layer by means of plasma spraying without the risk of deformation, so that the complementary lattice geometry introduced into the fiber ceramic layer is fully retained even when the metal oxide layer is sprayed on.
  • the area around the mold surfaces of the casting mold is thus formed by a sandwich construction, the surface consisting of Al203 or Zr02 having the highest mechanical strength, while the subsequent ceramic fiber layer forms the actual casting geometry body, which ensures the highest thermal insulation with sufficient mechanical strength .
  • the base body of the casting mold can consist of simple gray cast iron or globular graphite cast iron or steel, so that it has the necessary mechanical strength for receiving the mold guide elements, cooling channels, thermal sensors, ejectors, mold fastening elements, etc.
  • Vent slots are provided in the molds which are customary today. Vent slots of this type can also be provided in the sandwich structure according to the invention.
  • Porous structures in the metal oxide layer, but also in the fiber ceramic layer can be achieved, for example, by chemically removing certain oxides, metal particles or heat-stable organic compounds, which are added to the actual spray material or the fiber ceramic layer are.
  • Porous layers can also be achieved by adding carbon particles in the form of graphite, which are then oxidized to CO2.
  • the invention also relates to an accumulator grid produced using the casting mold according to the invention, which is characterized by particular dimensional stability and a surface which is particularly suitable for the purposes of an accumulator grid.
  • the two plates 11, 12 of a casting mold according to the invention contain cooling channels 21 and heating means 22, by means of which the plates can each be brought to the temperature suitable for a specific stage of the casting process.
  • the left plate 11 in the drawing is also provided with only schematically indicated ejectors and form fasteners 23, the right plate 12 in the drawing can be folded away from the plate 11 by a hinge (not shown) in order to be able to remove the finished lead grille from the mold .
  • the structure on which the two plates 11, 12 are positioned exactly relative to one another is indicated at 26.
  • Each plate 11, 12 consists of a gray cast iron base body 14 or 15.
  • recesses 24 and 25 are provided, which extend over the entire casting area of the mold.
  • High-temperature fiber ceramic layers 16, 17 are introduced into the recesses 24, 25 and fastened there in a suitable manner.
  • the connecting surfaces between the base bodies 14, 15 on the one hand and the high-temperature fiber ceramic layers 16, 17 on the other hand are essentially flat.
  • the thickness of the fiber ceramic layers 16, 17 is 10 mm.
  • the casting profile 13 corresponding to the lead mesh to be produced is worked in, plus an addition for a subsequently applied metal oxide layer.
  • An approximately 0.5 mm thick metal oxide layer 18 or 19 is then applied to the fiber ceramic layers 16, 17 by plasma spraying, which forms the molded surface provided with the casting profile 13.
  • the fiber ceramic layer 16, 17 prevents the lead melt melted into the casting mold from cooling too quickly when it is being produced.
  • the fiber ceramic layer is sufficiently strong to tolerate the plasma spraying of the metal oxide powder without deformation on the one hand and also to form a sufficiently solid base for the applied metal oxide layer.
  • the fiber ceramic layer can be fastened to the gray cast iron base body 14, 15 either with a mechanical tensioning frame or by means of tensioning bolts or inserted and glued into the grooves provided in the base body. A combination of both methods is also possible.
  • the surface structure of a grid produced according to the invention is particularly fine-grained and leads to a large contact area between the grid and the mass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Mold Materials And Core Materials (AREA)
EP93111610A 1992-07-21 1993-07-20 Moule de grille pour coulée des grilles d'accumulateur en plomb et procédé Withdrawn EP0581170A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4224078A DE4224078A1 (de) 1992-07-21 1992-07-21 Gittergießform zum Gießen von Akkumulatoren-Bleigittern und Verfahren zu deren Herstellung
DE4224078 1992-07-21

Publications (1)

Publication Number Publication Date
EP0581170A1 true EP0581170A1 (fr) 1994-02-02

Family

ID=6463775

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93111610A Withdrawn EP0581170A1 (fr) 1992-07-21 1993-07-20 Moule de grille pour coulée des grilles d'accumulateur en plomb et procédé

Country Status (4)

Country Link
US (1) US5415219A (fr)
EP (1) EP0581170A1 (fr)
DE (1) DE4224078A1 (fr)
ZA (1) ZA935258B (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7066234B2 (en) * 2001-04-25 2006-06-27 Alcove Surfaces Gmbh Stamping tool, casting mold and methods for structuring a surface of a work piece
US6759069B2 (en) * 2001-07-23 2004-07-06 Robin S. Gray Food condiment, composition, method of molding, and method of using
US6701998B2 (en) 2002-03-29 2004-03-09 Water Gremlin Company Multiple casting apparatus and method
US8701743B2 (en) 2004-01-02 2014-04-22 Water Gremlin Company Battery parts and associated systems and methods
US8497036B2 (en) 2009-04-30 2013-07-30 Water Gremlin Company Battery parts having retaining and sealing features and associated methods of manufacture and use
DE102009033402A1 (de) * 2009-07-15 2011-01-27 Lahnwerk Gmbh Formeinlage für einen Gießkern und/oder eine Gießform sowie Gießkern und/oder Gießform mit einer Formeinlage
WO2011090946A1 (fr) * 2010-01-19 2011-07-28 Water Gremlin Company Ensembles de moules comprenant des insertions amovibles et procédés associés d'utilisation et de fabrication
DE102011078066A1 (de) * 2011-06-24 2012-12-27 Oskar Frech Gmbh + Co. Kg Gießtechnisches Bauteil und Verfahren zum Aufbringen einer Korrosionsschutzschicht
US9748551B2 (en) 2011-06-29 2017-08-29 Water Gremlin Company Battery parts having retaining and sealing features and associated methods of manufacture and use
US10434568B2 (en) * 2012-04-12 2019-10-08 Loukus Technologies, Inc. Thermal isolation spray for casting articles
DE102013019309B4 (de) 2012-11-14 2014-07-24 Technische Universität Bergakademie Freiberg Verfahren zum Gießen von offenporigen zellularen Metallteilen
US9954214B2 (en) 2013-03-15 2018-04-24 Water Gremlin Company Systems and methods for manufacturing battery parts
US11283141B2 (en) 2018-12-07 2022-03-22 Water Gremlin Company Battery parts having solventless acid barriers and associated systems and methods
DE102020210913A1 (de) * 2020-08-28 2022-03-03 Oskar Frech Gmbh + Co. Kg Gießtechnisches Bauteil mit Korrosionsschutzschichtaufbau

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55141351A (en) * 1979-04-24 1980-11-05 Natl Res Inst For Metals Molding metal mold
GB2063738A (en) * 1979-10-30 1981-06-10 Shin Kobe Electric Machinery Metal mould for lead alloy casting
EP0065996A1 (fr) * 1981-05-29 1982-12-08 Rosenthal Technik AG Garnissage céramique pour moules métalliques et son procédé de fabrication
EP0212157A2 (fr) * 1985-08-20 1987-03-04 VARTA Batterie Aktiengesellschaft Dispositif de coulée de grillages de plomb pour plaques d'accumulateurs et procédé pour sa fabrication
EP0219610A2 (fr) * 1985-09-20 1987-04-29 VARTA Batterie Aktiengesellschaft Moule pour la production de plaques à grilles pour accumulateurs à plomb
DE3603657A1 (de) * 1986-02-06 1987-10-01 Varta Batterie Verfahren zur herstellung einer giessform fuer batteriegitter
DE3806987A1 (de) * 1988-03-03 1989-09-14 Thyssen Industrie Verfahren zur herstellung von gussstuecken nach dem wachsausschmelzverfahren

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2903375A (en) * 1956-08-08 1959-09-08 Renault Method of coating a mould for use in a foundry
US3779816A (en) * 1971-08-26 1973-12-18 Gould Inc Method of making mold for forming objects
US3789910A (en) * 1972-11-07 1974-02-05 Gen Motors Corp Dip casting method using transpirationally cooled mold cavity
US4085792A (en) * 1975-10-02 1978-04-25 General Battery Corporation Method of casting lead alloy automotive battery parts
CH650425A5 (de) * 1981-05-21 1985-07-31 Alusuisse Kokille mit waermeisolierender schutzschicht.
DE3216432A1 (de) * 1982-05-03 1983-11-03 Varta Batterie Ag, 3000 Hannover Verfahren und vorrichtung zum giessen von elektrodengittern fuer elektrische akkumulatoren
DE3433583A1 (de) * 1984-09-13 1986-03-20 Varta Batterie Ag, 3000 Hannover Giessform zur herstellung von gitterplatten fuer bleiakkumulatoren
JPS61286037A (ja) * 1985-06-12 1986-12-16 Yuasa Battery Co Ltd 鉛合金の鋳造法
DE3529725A1 (de) * 1985-08-20 1987-03-05 Varta Batterie Vorrichtung zum giessen von bleigittern fuer elektrische akkumulatorenplatten und verfahren zu ihrer herstellung
JPH02187252A (ja) * 1989-01-12 1990-07-23 Yuasa Battery Co Ltd 鉛合金用鋳型
IT1250214B (it) * 1991-11-22 1995-04-03 Rivestimento al nitruro di titanio per conchiglie per pistoni.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55141351A (en) * 1979-04-24 1980-11-05 Natl Res Inst For Metals Molding metal mold
GB2063738A (en) * 1979-10-30 1981-06-10 Shin Kobe Electric Machinery Metal mould for lead alloy casting
EP0065996A1 (fr) * 1981-05-29 1982-12-08 Rosenthal Technik AG Garnissage céramique pour moules métalliques et son procédé de fabrication
EP0212157A2 (fr) * 1985-08-20 1987-03-04 VARTA Batterie Aktiengesellschaft Dispositif de coulée de grillages de plomb pour plaques d'accumulateurs et procédé pour sa fabrication
EP0219610A2 (fr) * 1985-09-20 1987-04-29 VARTA Batterie Aktiengesellschaft Moule pour la production de plaques à grilles pour accumulateurs à plomb
DE3603657A1 (de) * 1986-02-06 1987-10-01 Varta Batterie Verfahren zur herstellung einer giessform fuer batteriegitter
DE3806987A1 (de) * 1988-03-03 1989-09-14 Thyssen Industrie Verfahren zur herstellung von gussstuecken nach dem wachsausschmelzverfahren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 5, no. 10 (M - 51)<682> 22 January 1981 (1981-01-22) *

Also Published As

Publication number Publication date
US5415219A (en) 1995-05-16
ZA935258B (en) 1994-04-26
DE4224078A1 (de) 1994-01-27

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