EP0093386A2 - Procédé et installation pour couler des grilles d'électrodes pour accumulateurs électriques - Google Patents

Procédé et installation pour couler des grilles d'électrodes pour accumulateurs électriques Download PDF

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Publication number
EP0093386A2
EP0093386A2 EP83104100A EP83104100A EP0093386A2 EP 0093386 A2 EP0093386 A2 EP 0093386A2 EP 83104100 A EP83104100 A EP 83104100A EP 83104100 A EP83104100 A EP 83104100A EP 0093386 A2 EP0093386 A2 EP 0093386A2
Authority
EP
European Patent Office
Prior art keywords
mold
heat
casting
heating
lead
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.)
Granted
Application number
EP83104100A
Other languages
German (de)
English (en)
Other versions
EP0093386A3 (en
EP0093386B1 (fr
Inventor
Hans-Joachim Dr. Golz
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.)
VARTA Batterie AG
Original Assignee
VARTA 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 VARTA Batterie AG filed Critical VARTA Batterie AG
Priority to AT83104100T priority Critical patent/ATE23122T1/de
Publication of EP0093386A2 publication Critical patent/EP0093386A2/fr
Publication of EP0093386A3 publication Critical patent/EP0093386A3/de
Application granted granted Critical
Publication of EP0093386B1 publication Critical patent/EP0093386B1/fr
Expired 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
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould

Definitions

  • the invention relates to a method for casting electrode grids for electrical accumulators in a casting mold and a device for carrying out this method.
  • mold heaters are generally provided which prevent heat from flowing out too quickly.
  • cooling of the casting molds must also be ensured if an overheating that occurs during operation and the resulting longer cooling times are to be reduced again until the lead solidifies.
  • the molds are provided with channels for the flow of cooling water.
  • the invention is therefore based on the object of shortening the cycle time of the lattice casting, reducing the thermal resistance and accelerating the heat flow out of the melting material in the sense of a larger thermal gradient, with the reliable filling of the mold having to be ensured.
  • the cumbersome pretreatment of the mold by spraying should be dispensed with and the service life of the mold should also be extended.
  • an improvement in the GuB quality is to be achieved by further refining the crystal structure, even with a cheaper alloy.
  • the object is achieved according to the invention in that the heat flowing away from the material to be melted by thermal conduction is at least partially compensated for by an additional heat pulse.
  • FIG. 1 schematically shows the course of cooling castings under the ordinary and the inventive G garbagebedin- un g g s.
  • Figure 2 shows a Gitterg screenform which is equipped with an inventive heater.
  • the course of the temperature T of the melting material is plotted over time t in FIG.
  • the flow of the lead melt into the casting mold begins at time t 1 and ends at t 3 , where the inlet temperature is T 1 .
  • the cooling begins even before the mold is completely filled, but the cooling residue is slow due to the low thermal conductivity of the cork powder layer, so that only after a longer time interval - time t 4 - the solidification point T 2 of the melt and finally at t 8 that Demoulding temperature T 3 of the casting can be reached (curve A).
  • this short but critical cooling phase is now covered up by stopping the outflow of waste heat within the mold during the filling thereof by means of a targeted heat impulse on the melting material, which can lead to a slight increase in temperature due to heat build-up.
  • the heat supply is stopped, and the cooling effect of the cooling tubes installed in the mold halves is now fully effective, so that a cooling curve C according to the invention is established parallel to B. It intersects the temperature lines T 2 (solidification temperature) and T 3 (demolding temperature) at t 5 and t 7 .
  • the temperature control according to the invention thus modulates the interval heating, which operates in time with the lattice casting machine, to a certain extent, the strength of the heating pulse having to take into account the thermal conductivity of the casting mold. For example, the loss of heat flowing out of the melted material in a casting mold with high thermal insulation may to be only partially compensated for, while it must be fully compensated or even overcompensated for a heat-conducting casting mold.
  • the measure according to the invention also makes it possible to shorten the cycle time and thus to work more quickly, which has a favorable effect on the product insofar as an alloy lattice with a very fine-grained structure results.
  • the casting temperature T 1 can be kept relatively low at a short distance from the solidification temperature T 2 , since the heat during the filling process keeps the melting material from the danger zone of solidification or low viscosity with sufficient certainty.
  • the melting point of a lead-antimony alloy with 5% Sb is 291 ° C.
  • the casting temperature can then be around 300 ° C.
  • the supply of an additional heat pulse according to the invention is not only applicable to conventional grid casting devices, but it can also support the Continuous grid casting using a drum casting machine (drum casting), in which it is also important to achieve very short solidification times.
  • drum casting drum casting
  • a device suitable for carrying out the method according to the invention consists of a divided casting mold which is particularly advantageously provided with an induction heating device for heating the melting material.
  • the casting mold is expediently formed by a mold carrier 1 made of metal, which has an insert made of the corresponding molded parts 2.
  • This actual shape can consist of a ceramic, for example according to FR-PS 2.D69.572 made of silicon nitride, by means of which better heat dissipation is ensured than by cork powder.
  • the copper windings of an inductor 3 are attached to the outer surface of the mold half, the magnetic alternating field emanating from it passes through the lead grid 4 and generates heat in it by eddy current formation in the liquid grid.
  • the inductor is connected to an external induction heating system.
  • the copper conductors which are designed here as a flat coil (pancake coil), are surrounded by substances such as dynamo sheet or high-frequency iron 5 which carry the magnetic field.
  • the inductor can also be constructed using a meandering conductor guide.
  • the conductors are designed as copper pipes so that they can dissipate their own electricity heat losses, but also the heat that comes from the lead grid.
  • the device according to the invention is completed by an effective cooling system.
  • This is indicated in the sectional view of the right-hand mold carrier 2 through the cross-sectional openings 6 of numerous cooling channels.
  • the heat dissipation through The metallic mold carrier material e.g. cast iron, is effectively supported by the cooling system, although it may be advantageous to heat the lead melt in a differentiated manner afterwards to also cool it in a finely divided manner, because the heat conduction and the electrical conduction not only in the melting material itself, but also in the Mold materials go hand in hand.
  • resistance heating can also be the suitable technical means for controlling the temperature of the casting process according to the invention in accordance with the cooling curve C in FIG.
  • resistance heating elements can be embedded as wire or heating tubes in the ceramic of the shaped body, preferably just below the surface and at places where the greatest heat is required. Due to the relatively good heat conduction of the ceramic shape, the heat generated by the resistance elements when they are connected to an external power source is quickly and effectively given off to the incoming lead. The shape heated in this way favors the complete filling with liquid lead. As soon as the mold is filled, the resistance heating is switched off and the cooling effect of the cooling system ensures rapid solidification and cooling of the lead grid.
  • a third alternative is flame heating.
  • the mold carrier is acted upon from the outside by the flames; the heat conduction is delayed because of the wall thickness of the mold carrier, but it can be adjusted with a corresponding time reserve and can be optimized by other profile configurations of the mold carrier.
  • the air gaps can be filled with a heat-conducting medium.
  • a heat-conducting medium is a chemically inert heat-conducting oil, preferably a high-boiling paraffin oil, silicone oil or wax.
  • the improvement of the heat conduction between the ceramic form and the coolant-flowed conductors of the inductor heating system can also be improved using such heat conducting oils.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Stand-By Power Supply Arrangements (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Continuous Casting (AREA)
EP83104100A 1982-05-03 1983-04-27 Procédé et installation pour couler des grilles d'électrodes pour accumulateurs électriques Expired EP0093386B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83104100T ATE23122T1 (de) 1982-05-03 1983-04-27 Verfahren und vorrichtung zum giessen von elektrodengittern fuer elektrische akkumulatoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3216432 1982-05-03
DE19823216432 DE3216432A1 (de) 1982-05-03 1982-05-03 Verfahren und vorrichtung zum giessen von elektrodengittern fuer elektrische akkumulatoren

Publications (3)

Publication Number Publication Date
EP0093386A2 true EP0093386A2 (fr) 1983-11-09
EP0093386A3 EP0093386A3 (en) 1984-02-08
EP0093386B1 EP0093386B1 (fr) 1986-10-29

Family

ID=6162537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104100A Expired EP0093386B1 (fr) 1982-05-03 1983-04-27 Procédé et installation pour couler des grilles d'électrodes pour accumulateurs électriques

Country Status (8)

Country Link
US (1) US4903753A (fr)
EP (1) EP0093386B1 (fr)
AT (1) ATE23122T1 (fr)
CA (1) CA1198157A (fr)
DE (2) DE3216432A1 (fr)
ES (2) ES522011A0 (fr)
FI (1) FI74168C (fr)
NO (1) NO157439C (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4224078A1 (de) * 1992-07-21 1994-01-27 Hagen Batterie Ag Gittergießform zum Gießen von Akkumulatoren-Bleigittern und Verfahren zu deren Herstellung
US5905002A (en) * 1997-02-13 1999-05-18 Gnb Technologies, Inc. Lead acid storage battery
DE19705458A1 (de) * 1997-02-13 1998-08-20 Leybold Systems Gmbh Tiegel zum induktiven Schmelzen oder Überhitzen von Metallen, Legierungen oder anderen elektrisch leitfähigen Werkstoffen
DE10349980A1 (de) * 2003-10-24 2005-09-22 Hunck, Wolfgang, Dipl.-Ing. Abkühlen stromdurchfluteter Schmelzen
US8648282B2 (en) * 2009-07-09 2014-02-11 Wal-Mart Stores, Inc. Cooking apparatus and method
WO2014164593A1 (fr) * 2013-03-12 2014-10-09 United Technologies Corporation Ensemble tube d'injection isothermique
CN106328882A (zh) * 2015-06-25 2017-01-11 安徽超威电源有限公司 一种电瓶极板生产装置
CN110000364A (zh) * 2018-12-24 2019-07-12 超威电源有限公司 一种快速热导铅合金板栅浇铸模具
CN113088740B (zh) * 2021-04-07 2021-12-28 北京宏钧新材料技术有限公司 一种泡沫铝生产系统及生产方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB185844A (en) * 1921-06-11 1922-09-11 Charles Roland Norwood Improvements in metal moulds or dies for use in casting metals
US1454066A (en) * 1921-04-15 1923-05-08 Hubert A Myers Company Mold and process for casting materials
GB260390A (en) * 1925-09-15 1926-11-04 Lightalloys Ltd Improvements in metal moulds or dies for use in casting metal
US2266138A (en) * 1939-11-03 1941-12-16 Alvy C Yerkey Grid casting machine
US2454051A (en) * 1944-06-03 1948-11-16 Electric Storage Battery Co Mold for the manufacture of storage batteries
DE1471752A1 (de) * 1964-09-19 1969-03-20 Sonnenschein Accumulatoren Verfahren und Vorrichtung zum Giessen von Formteilen aus Blei oder Bleilegierungen
DE1805300A1 (de) * 1967-10-25 1969-07-31 Matsushita Electric Ind Co Ltd Vorrichtung zur Herstellung von Gittern fuer Speicherbatterien
DE1508770A1 (de) * 1966-11-08 1969-11-13 Sonnenschein Accumulatoren Verfahren und Vorrichtung zum Verbinden von Metallteilen mit metallischen Bauelementen von insbesondere Akkumulatoren
FR2069572A5 (fr) * 1969-11-21 1971-09-03 Electric Power Storage Ltd
US4079911A (en) * 1976-10-20 1978-03-21 Wirtz Manufacturing Company, Inc. Battery grid casting mold

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1570317A (en) * 1924-11-15 1926-01-19 Charles E Stewart Ejector pawl
US1978222A (en) * 1932-09-24 1934-10-23 Allegheny Steel Co Method of and apparatus for treating metallic materials
US2045576A (en) * 1934-03-09 1936-06-30 Robert W Bedilion Method of and apparatus for treating metal castings
US2120223A (en) * 1934-08-15 1938-06-07 Ajax Electric Furnace Corp Induction electric furnace and method
US2579898A (en) * 1949-05-03 1951-12-25 Brucker Milton Mold for heat curing thermosetting resins
US2850778A (en) * 1956-06-18 1958-09-09 Mack F Smith Apparatus for casting vent pipe flashings
US2870497A (en) * 1956-08-13 1959-01-27 Strauss Casting metals and alloys
US2892224A (en) * 1957-05-09 1959-06-30 Nat Lead Co Heating of dies by internal combustion
US3432642A (en) * 1966-06-01 1969-03-11 Burger Eisenwerke Ag Cooking pan suitable for the preparation of dietetic and nondietetic foods
SU416396A1 (fr) * 1967-03-11 1974-02-25
SU293430A1 (ru) * 1969-04-12 1976-03-15 Ордена Ленина Завод "Кузбассэлектромотор" Способ получени отливок
US3815659A (en) * 1972-09-29 1974-06-11 Gen Battery Corp Process for casting molten metal
JPS5659566A (en) * 1979-10-17 1981-05-23 Yuasa Battery Co Ltd Continuous casting device of grid for lead storage battery

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1454066A (en) * 1921-04-15 1923-05-08 Hubert A Myers Company Mold and process for casting materials
GB185844A (en) * 1921-06-11 1922-09-11 Charles Roland Norwood Improvements in metal moulds or dies for use in casting metals
GB260390A (en) * 1925-09-15 1926-11-04 Lightalloys Ltd Improvements in metal moulds or dies for use in casting metal
US2266138A (en) * 1939-11-03 1941-12-16 Alvy C Yerkey Grid casting machine
US2454051A (en) * 1944-06-03 1948-11-16 Electric Storage Battery Co Mold for the manufacture of storage batteries
DE1471752A1 (de) * 1964-09-19 1969-03-20 Sonnenschein Accumulatoren Verfahren und Vorrichtung zum Giessen von Formteilen aus Blei oder Bleilegierungen
DE1508770A1 (de) * 1966-11-08 1969-11-13 Sonnenschein Accumulatoren Verfahren und Vorrichtung zum Verbinden von Metallteilen mit metallischen Bauelementen von insbesondere Akkumulatoren
DE1805300A1 (de) * 1967-10-25 1969-07-31 Matsushita Electric Ind Co Ltd Vorrichtung zur Herstellung von Gittern fuer Speicherbatterien
FR2069572A5 (fr) * 1969-11-21 1971-09-03 Electric Power Storage Ltd
US4079911A (en) * 1976-10-20 1978-03-21 Wirtz Manufacturing Company, Inc. Battery grid casting mold

Also Published As

Publication number Publication date
ES8402466A1 (es) 1984-02-01
NO157439B (no) 1987-12-07
FI831355L (fi) 1983-11-04
ES522010A0 (es) 1984-02-01
NO831037L (no) 1983-11-04
FI74168B (fi) 1987-08-31
ES8402467A1 (es) 1984-02-01
US4903753A (en) 1990-02-27
DE3216432A1 (de) 1983-11-03
ATE23122T1 (de) 1986-11-15
NO157439C (no) 1988-03-16
CA1198157A (fr) 1985-12-17
FI831355A0 (fi) 1983-04-21
EP0093386A3 (en) 1984-02-08
DE3367175D1 (en) 1986-12-04
ES522011A0 (es) 1984-02-01
FI74168C (fi) 1987-12-10
EP0093386B1 (fr) 1986-10-29

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