EP0065996B1 - Garnissage céramique pour moules métalliques et son procédé de fabrication - Google Patents

Garnissage céramique pour moules métalliques et son procédé de fabrication Download PDF

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Publication number
EP0065996B1
EP0065996B1 EP81104107A EP81104107A EP0065996B1 EP 0065996 B1 EP0065996 B1 EP 0065996B1 EP 81104107 A EP81104107 A EP 81104107A EP 81104107 A EP81104107 A EP 81104107A EP 0065996 B1 EP0065996 B1 EP 0065996B1
Authority
EP
European Patent Office
Prior art keywords
ceramic
linings
metal casting
metal
foil
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
EP81104107A
Other languages
German (de)
English (en)
Other versions
EP0065996A1 (fr
Inventor
Stefan Dr. Rer. Nat. Dipl.-Chem. Schindler
Reinhard Keramik-Ing. Grad. Wedemeyer
Heinrich Keramik-Ing. Grad. Schelter
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.)
Ceramtec GmbH
Original Assignee
Ceramtec 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 Ceramtec GmbH filed Critical Ceramtec GmbH
Priority to EP81104107A priority Critical patent/EP0065996B1/fr
Priority to DE8181104107T priority patent/DE3165664D1/de
Priority to AT81104107T priority patent/ATE9069T1/de
Publication of EP0065996A1 publication Critical patent/EP0065996A1/fr
Application granted granted Critical
Publication of EP0065996B1 publication Critical patent/EP0065996B1/fr
Expired 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

Definitions

  • the invention relates to linings for metal casting molds made of ceramic material for producing flat metal bodies, which are inserted as a negative mold in the respective parts of a metal casting mold.
  • the invention also relates to a method for producing the linings for metal casting molds according to the preamble of claim 3.
  • the aim of the measure according to the invention is to optimize the structures of flat metal bodies, ie the parts should be thinner and more uniform, in particular since the production of battery grids is always from the point of view of reducing costs and. Performance improvement is done. Ceramic foils produced by casting are suitable for particularly thin linings.
  • a method for producing such grids in particular from lead or lead alloys for electrical accumulator plates, is disclosed in FR-A No. 2069572, the surfaces of the mold which are in contact with the melt being made of silicon nitride.
  • Such ceramic linings are fixed in the form by metallic support plates made of cast iron.
  • the ceramic material is pressed and sintered into a negative mold, the negative molds being inserted into the respective parts of the casting mold.
  • these ceramic linings are relatively thick, so that heat dissipation from the melt is very slow, which hinders production in large numbers. Uniform cooling is also not possible due to the measures described.
  • One tries to remedy this disadvantage by placing a thin metal foil with high thermal conductivity between the mentioned parts made of silicon nitride and the support plates made of cast iron.
  • the object of the invention is therefore to provide a multi-part ceramic lining for metal casting molds of the type mentioned at the outset, which ensures rapid heat dissipation of the melting energy.
  • the ceramic lining should be easy and quick to replace and improve the quality of the cast with regard to a uniform and thinner structure.
  • Another object of the invention is to provide an expedient manufacturing process using ceramic foils for such linings of metal casting molds.
  • the metal casting molds can be produced more cost-effectively, since the copy milling of the negative lattice structure or the post-processing of the metal casting mold is no longer necessary.
  • the ceramic linings themselves can be changed quickly and easily; the shape accuracy of the ceramics increases the capacity of the casting system. This aspect is particularly important in view of the current efforts to optimize these lattice structures, i.e. to make them thinner and more even.
  • the ceramic lining is produced in accordance with known processes with regard to film production, cutting / punching and sintering.
  • the ceramic foils are manufactured according to the doctor blade process, the foil thickness being between 0.4 and 1.2 mm.
  • individual layers of film can be laminated together before or after embossing.
  • Laminating is understood to mean the connection of individual foils under pressure and optionally temperature by means of a laminating agent which has essentially the same composition as the foil material itself.
  • the individual foils or foil packages are embossed according to the invention by means of a heatable die at a pressure of 5 to 100 bar and temperatures of 20 to 120 ° C. According to the invention, the organic components are subsequently heated at approximately 300 to 500 ° C.
  • the embossed laminate is pre-sintered at approx. 1000 to 1100 ° C.
  • a finishing or application of a thermal protective layer to the metal casting mold is no longer necessary, which is the case at the Technology often led to errors in the production of metal grids.
  • cleaning is no longer necessary if the protective layer is damaged or has worn out over time.
  • the ceramic linings produced according to the invention also result in a reduction in rejects and thus a significant improvement in the economics of the process, since the ceramics used are not wetted by lead and its alloys, as well as other metals and alloys that are suitable for the production of lattices. Any lattice structure can also be produced in the simplest way by embossing.
  • the ceramic negative mold 1 shown in FIG. 1 is produced either by embossing a film or by dry pressing a ceramic granulate. For special applications, e.g. for the production of grids for accumulators, it has a rectangular shape. The thickness of the ceramic lining is over 0.5 mm. A change in the angled shape either in a circular or elliptical shape is easily possible by merely modifying the embossing device.
  • the negative mold 1 contains three edge sides 2 and an upper part 3, from which the casting takes place here. On the later casting side there are numerous depressions 12 which later result in the lattice structure of the cast object 11 and projections 4 which result in the openings of the later lattice.
  • the projections 4 optionally have stomata 5 so that the air can escape during the casting process.
  • the depressions 12 have a semicircular or angular cross section, the depth of these depressions 12 being half the thickness of the grid to be produced, e.g. 0.6 mm for the frame or 0.4 mm for the grid network.
  • FIG. 2 Two variations of the embodiment result from the section along the line A-B of FIG. 1.
  • FIG. 2 not only the depressions 12 and elevations 4 on the casting side can be seen, but also the rib-shaped structure 8 of the rear wall.
  • the rib-shaped structure with a width e.g. from 0.7 to 2 mm, a rib height e.g. up to 1.5 mm and a rib spacing of e.g. 1.5 to 5 mm serves to enlarge the surface and thus for better heat dissipation and also as a positioning aid when fitting the ceramic lining into the metal mold 6, 7.
  • the rear wall has cooling channels 9 for the immediate cooling of the cast metal body after casting.
  • the dimensions of the channels are e.g. 0.4 x 0.4 mm to 2 x 2 mm, the web width between the individual channels e.g. 0.4 to 1 mm.
  • the mold for the production of a metallic grid is shown in Fig. 4.
  • the casting mold consists of a divided metallic outer mold 6, 7, in which the divided ceramic negative molds 1 are inserted.
  • the liquid metal runs over the pouring funnel 10 into the optionally preheated negative mold 1 lined with ceramic.
  • the ceramic negative molded parts 1 can also have a plurality of pins, holes or embossed depressions, so that the ceramic lining can be positioned precisely in the casting mold. After solidification, the metal mold is opened and the metal body is removed.
  • the ceramic lining according to the invention is partly produced by known processes. It encompasses the following process steps: mass preparation, film production using the doctor blade process, punching / cutting the film to the required dimensions, laminating the individual films together to the required thickness of the ceramic lining, stamping the film, heating the organic Ingredients and sintering. If further processing is required in addition to the embossing process, pre-sintering is carried out after baking, processed and only then sintered.
  • the solids content of the casting compound for the aluminum titanate film is between 60 to 95% by weight, the proportion of organic constituents such as plasticizers, plasticizers and binders correspondingly 40 to 50% by weight.
  • solvent-based films or water films are produced.
  • solvent-containing foils e.g. with trichlorethyleneethanol as solvent and polyvinylbutyral as binder
  • the stamping itself is carried out with a die at temperatures between 20 and 120 ° C and pressures between 5 and 100 bar. In the example mentioned above, this process step takes place at 20 ° C. and 30 bar.
  • the ratio of embossing depth to film thickness essentially depends on the composition of the film, but can be, for example, 3: 1.
  • the corresponding positioning aids are also generated during the embossing process.
  • the organic components are burned out at temperatures between 300 to 500 ° C., the temperature-time program to be selected being determined by the type and amount of the organic components used.
  • the sintering process takes place at temperatures between 1300 and 1500 ° C, for example between 1300 and 1400 ° C for aluminum titanate.
  • This ceramic lining described essentially has a flat back. If the surface of the back is to be enlarged in order to improve the heat flow after the casting process, ribs can be created on the back when embossing the negative mold by replacing the smooth upper punch of the die with a stamp with the corresponding rib structure.
  • the creation of channel-shaped structures on the back of the ceramic lining for indirect cooling of the cast metal body is carried out in an analogous manner, but a second embossed film with a rib structure and a smooth back must be produced here, which is then subsequently made with the embossed film, which has the negative form and the rib structure on the back, is laminated together. After this process, the organic components are then heated and the ceramic components are sintered as described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insulating Bodies (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Ceramic Products (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Laminated Bodies (AREA)

Claims (4)

1. Garnissage en matière céramique (1 ) pour moules de fonderie métalliques (6, 7) pour la production de corps métalliques plats, qui est inséré comme moule négatif dans les parties respectives de tels moules de fonderie métalliques (6, 7), caractérisé en ce que le moule négatif du garnissage (1 ) possède sur sa paroi arrière une structure nervurée (8) et présente des canaux de refroidissement (9).
2. Garnissage pour moules de fonderie métalliques selon la revendication 1, caractérisé en ce qu'on utilise comme matériau céramique du titanate d'aluminium.
3. Procédé de fabrication de garnissages en matière céramique (1) pour moules de fonderie métalliques (6, 7) suivant l'une des revendications 1 ou 2, selon lequel une feuille céramique est coulée, les feuilles sont estampées ou découpées à la dimension brute et sont frittées après le façonnage à 1300-1500° C, caractérisé en ce qu'on matrice les feuilles dans une matrice à 20-120° Cet sous une pression de 5 à 100 bar, puis on fait brûler les constituants organiques tels que liants, agents de plastification et ramollissants de la feuille à 300-500° C.
4. Procédé de préparation de garnissage pour moules de fonderie métalliques suivant la revendication 3, caractérisé en ce que la feuille céramique fabriquée à base de solvants est ramollie avant le matriçage dans une solution contenant une huile ou des acides carboxyliques insaturés.
EP81104107A 1981-05-29 1981-05-29 Garnissage céramique pour moules métalliques et son procédé de fabrication Expired EP0065996B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP81104107A EP0065996B1 (fr) 1981-05-29 1981-05-29 Garnissage céramique pour moules métalliques et son procédé de fabrication
DE8181104107T DE3165664D1 (en) 1981-05-29 1981-05-29 Ceramic lining for metal moulds and method of making the same
AT81104107T ATE9069T1 (de) 1981-05-29 1981-05-29 Keramikauskleidung fuer metallgiessformen und ein verfahren zu ihrer herstellung.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81104107A EP0065996B1 (fr) 1981-05-29 1981-05-29 Garnissage céramique pour moules métalliques et son procédé de fabrication

Publications (2)

Publication Number Publication Date
EP0065996A1 EP0065996A1 (fr) 1982-12-08
EP0065996B1 true EP0065996B1 (fr) 1984-08-22

Family

ID=8187744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104107A Expired EP0065996B1 (fr) 1981-05-29 1981-05-29 Garnissage céramique pour moules métalliques et son procédé de fabrication

Country Status (3)

Country Link
EP (1) EP0065996B1 (fr)
AT (1) ATE9069T1 (fr)
DE (1) DE3165664D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10207989A1 (de) * 2002-02-25 2003-09-11 Daimler Chrysler Ag Dauergießform mit keramischer Auskleidung
DE102006051814B3 (de) * 2006-11-03 2008-07-31 Fachhochschule Koblenz Körper zum Leiten von Metallschmelzen sowie ein Verfahren zur Herstellung eines solchen Körpers
US7767347B2 (en) 2005-05-23 2010-08-03 Johnson Controls Technology Company Battery grid
US8252464B2 (en) 1999-07-09 2012-08-28 Johnson Controls Technology Company Method of making a battery grid
US9130232B2 (en) 2010-03-03 2015-09-08 Johnson Controls Technology Company Battery grids and methods for manufacturing same
US9577266B2 (en) 2007-03-02 2017-02-21 Johnson Controls Technology Company Negative grid for battery

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3668812D1 (de) * 1985-08-20 1990-03-15 Varta Batterie Vorrichtung zum giessen von bleigittern fuer elektrische akkumulatorenplatten und verfahren zu ihrer herstellung.
DE3533581A1 (de) * 1985-09-20 1987-04-02 Varta Batterie Giessform zur herstellung von gitterplatten fuer bleiakkumulatoren
DE4224078A1 (de) * 1992-07-21 1994-01-27 Hagen Batterie Ag Gittergießform zum Gießen von Akkumulatoren-Bleigittern und Verfahren zu deren Herstellung
US9748578B2 (en) 2010-04-14 2017-08-29 Johnson Controls Technology Company Battery and battery plate assembly
US9761883B2 (en) 2011-11-03 2017-09-12 Johnson Controls Technology Company Battery grid with varied corrosion resistance
DE102013111109A1 (de) 2013-10-08 2015-04-09 Johnson Controls Autobatterie Gmbh & Co. Kgaa Gitteranordnung für eine plattenförmige Batterieelektrode eines elektrochemischen Akkumulators sowie Akkumulator
DE102013111667A1 (de) 2013-10-23 2015-04-23 Johnson Controls Autobatterie Gmbh & Co. Kgaa Gitteranordnung für eine plattenförmige Batterieelektrode und Akkumulator
DE102017201121B4 (de) 2017-01-24 2024-03-28 Volkswagen Aktiengesellschaft Verfahren sowie Spritzgussvorrichtung zur Herstellung eines Kunststoffbauteils

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2069572A5 (fr) * 1969-11-21 1971-09-03 Electric Power Storage Ltd

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE860242C (de) * 1943-10-20 1952-12-18 Philips Nv Verfahren zur Herstellung von Gussstuecken
DE825454C (de) * 1948-11-30 1951-12-20 Noleiko Norddeutsche Leichtmet Dauerform fuer Metallguss
DE2108626A1 (en) * 1971-02-24 1972-08-31 Vereinigte Aluminium-Werke Ag, 5300 Bonn Re-usable ingot mould - consists of fired coke-binder mix
DE8029724U1 (de) * 1980-11-07 1981-02-26 Lahnwerk Huppert Gmbh & Co Kg, 3560 Biedenkopf Mehrteilige dauergiessform (kokille)

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2069572A5 (fr) * 1969-11-21 1971-09-03 Electric Power Storage Ltd

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8252464B2 (en) 1999-07-09 2012-08-28 Johnson Controls Technology Company Method of making a battery grid
US8709664B2 (en) 1999-07-09 2014-04-29 Johnson Controls Technology Company Battery grid
DE10207989B4 (de) * 2002-02-25 2004-02-19 Daimlerchrysler Ag Dauergießform mit keramischer Auskleidung
DE10207989A1 (de) * 2002-02-25 2003-09-11 Daimler Chrysler Ag Dauergießform mit keramischer Auskleidung
US8974972B2 (en) 2005-05-23 2015-03-10 Johnson Controls Technology Company Battery grid
US7955737B2 (en) 2005-05-23 2011-06-07 Johnson Controls Technology Company Battery grid
US7767347B2 (en) 2005-05-23 2010-08-03 Johnson Controls Technology Company Battery grid
US8399135B2 (en) 2005-05-23 2013-03-19 Johnson Controls Technology Company Battery grid
US8980419B2 (en) 2005-05-23 2015-03-17 Johnson Controls Technology Company Battery grid
DE102006051814B9 (de) * 2006-11-03 2008-12-11 Fachhochschule Koblenz Körper zum Leiten von Metallschmelzen sowie ein Verfahren zur Herstellung eines solchen Körpers
DE102006051814B3 (de) * 2006-11-03 2008-07-31 Fachhochschule Koblenz Körper zum Leiten von Metallschmelzen sowie ein Verfahren zur Herstellung eines solchen Körpers
US9577266B2 (en) 2007-03-02 2017-02-21 Johnson Controls Technology Company Negative grid for battery
US9130232B2 (en) 2010-03-03 2015-09-08 Johnson Controls Technology Company Battery grids and methods for manufacturing same

Also Published As

Publication number Publication date
DE3165664D1 (en) 1984-09-27
ATE9069T1 (de) 1984-09-15
EP0065996A1 (fr) 1982-12-08

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