EP2001644B1 - Verfahren und zugehörige(s) form und werkzeug zur herstellung von porzellanobjekten mit mindestens einem durchgangsloch - Google Patents

Verfahren und zugehörige(s) form und werkzeug zur herstellung von porzellanobjekten mit mindestens einem durchgangsloch Download PDF

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Publication number
EP2001644B1
EP2001644B1 EP07734257A EP07734257A EP2001644B1 EP 2001644 B1 EP2001644 B1 EP 2001644B1 EP 07734257 A EP07734257 A EP 07734257A EP 07734257 A EP07734257 A EP 07734257A EP 2001644 B1 EP2001644 B1 EP 2001644B1
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EP
European Patent Office
Prior art keywords
hole
mould
seat
porcelain
moulds
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.)
Not-in-force
Application number
EP07734257A
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English (en)
French (fr)
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EP2001644A2 (de
Inventor
Renato Attanasio
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Individual
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Individual
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Publication of EP2001644B1 publication Critical patent/EP2001644B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/261—Moulds therefor
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0061—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components for protecting the mechanism against external influences
    • G04D3/0064—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components for protecting the mechanism against external influences for cases

Definitions

  • the present invention relates to a method, a mould and an associated tool for producing porcelain objects with at least one through-hole.
  • moulds are provided with holes for introducing the casting mixture and holes for ventilation of the air which must escape from the mould so as to allow it to be filled with the porcelain and prevent trapping of air pockets which could result in breakage of the part during firing.
  • the object is removed from the mould and hand-finished by means of a series of steps involving firing, dipping in a surface finish glaze and firing at 1400°C after being placed on supports made of refractory material.
  • JP-A-07 191156 discloses a method for producing porcelain objects with at least one through-hole, wherein it comprises the steps of preparation of a bottom half -mould having a half -seat with a form corresponding to that of the object to be obtained; preparation of a top half -mould having a half - seat with a form corresponding to that of the object to be obtained; joining together of the two half - moulds in the vertical direction; casting of the liquid porcelain; drying of the part with hole obtained; opening of the mould and extraction of the part.
  • the technical problem which is posed, therefore, is to develop a method for producing porcelain objects which have at least one through-hole.
  • this through-hole may represent a precise reference point for the subsequent processing operations and/or assembly of the finished part, as, for example, with a watch case to which the associated mechanism must be fitted.
  • a further object of the present invention is to provide a tool and a mould which are able to allow the production of porcelain objects with at least one through-hole.
  • a mould for porcelain objects according to the present invention comprises essentially a bottom half-mould 10 and a top half-mould 20 which have a marching shape and can be joined together in the vertical direction Z-Z by means of projections 10a and corresponding holes 20a formed in suitable zones of the two facing surfaces of the respective half-moulds.
  • Both the said contact surfaces of the two half-moulds have, formed in them, the associated half-seat 11, 21 corresponding to the final form of the part and intended to be filled with the casting mixture P of porcelain.
  • Both the half-moulds 10, 20 also have a respective hole 12, 22 which are coaxial with each other; the hole 12 in the bottom half-mould 10 is blind, while the hole 22 in the top half-mould 20 is a through-hole.
  • a tool 30 for supplying the liquid mixture P of porcelain to the half-seats 11, 21 this tool 30 comprises a tubular member 31 which is open at the opposite ends and has upper holes 32a and lower holes 32b which are formed in the side surface of the tube at suitable distances from the respective opposite ends of the said tube.
  • the top part of the tubular member 31 has, associated with it, a cup 33 for containing the mixture P of liquid porcelain which is able to enter into the tube 31 via the upper radial holes 32a.
  • the cup 33 is integral with the tube 31, but in an alternative embodiment (not shown) it is envisaged that said cup 33 may be separate and provided with a through-hole in the bottom for coaxial mounting on the tube 31 during assembly of the mould on which it will rest during the working process.
  • the cup may also be made of plaster like the mould instead of steel as with the tubular member 31.
  • the distances of the lower radial holes 32b from the bottom end of the tubular member 31 and the depth of the blind hole 12 of the bottom half-mould 12 are such as to cause the liquid porcelain P to flow out into the seats 11, 21 so as to fill them.
  • the method according to the present invention may also comprise the following steps:
  • transverse seats 155 which pass through the respective half-moulds 10, 20 in the transverse direction Y-Y in a position corresponding to that of the strap holder cross-pieces 101 ( Fig. 4 ) so as to form a through-seat 101a passing through them and able to allow the insertion of a movable clip 102 for fastening the two male and female parts of a strap 2 to the respective pins as shown in the bottom part of Fig. 5 ; the top part of the latter instead shows a complete strap 3 which passes underneath the case 100 and above the two opposite cross-pieces 101.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Insulating Bodies (AREA)
  • Insulators (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Ceramic Products (AREA)
  • Inorganic Insulating Materials (AREA)

Claims (16)

  1. Verfahren zum Fertigen von Porzellanartikeln mit mindestens einem Durchgangsloch, umfassend die folgenden Schritte:
    Erstellen einer unteren Halbform (10) mit einem Halbsitz (11) einer der Form des zu erhaltenden Artikels entsprechenden Form;
    Bilden eines Sacklochs (12) mit einer vertikalen Achse innerhalb des Halbsitzes (11) der unteren Halbform (10);
    Erstellen einer oberen Halbform (20) mit einem Halbsitz (21) einer der Form des zu erhaltenden Artikels entsprechenden Form;
    Schaffen eines mit dem Sackloch (12) der unteren Halbform (10) koaxialen Durchgangslochs (22) in der oberen Halbform (20);
    Bereitstellen eines rohrförmigen Elements (31), das an den einander abgewandten Enden offen und mit oberen Löchern (32a) und unteren Löchern (32b) an der Seitenfläche in passenden Abständen von der jeweiligen abgewandten Enden des Rohrs ausgestattet ist;
    Bereitstellen eines Bechers (33) zum Zuführen des zu gießenden flüssigen Porzellans (P), ausgestattet mit einem Loch in einer Bodenfläche, dessen Innendurchmesser dem Außendurchmesser des Rohrs (31) entspricht;
    Zusammenfügen der beiden Halbformen (10, 20) in vertikaler Richtung Z-Z;
    Einführen des rohrförmigen Elements (31) in das Innere der beiden Formen, d. h. der oberen Halbform (20) und der unteren Halbform (10), durch das zugehörige Durchgangsloch (22) und das Sackloch (12);
    Anbringen des Bechers (33) an dem Rohrteil (31), welches von der oberen Halbform (20) vorsteht;
    Gießen des flüssigen Porzellans (P) in das Innere des Bechers (33);
    Eindringen-Lassen des flüssigen Porzellans (P) in das Innere des Rohrs (31) durch die oberen radialen Löcher (32a);
    Ausfließen-Lassen des Porzellans (P) in den Sitz (11, 21) durch die unteren radialen Löcher (32b);
    Austreiben der Luft (A) aus der Form durch die obere Öffnung in dem Rohr (31);
    Trocknen des erhaltenen Teils (100) mit Loch (110);
    Öffnen der Form;
    Entnehmen des Teils.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das untere Sackloch (12) und das obere Durchgangsloch (23) koaxial bezüglich des Mittelpunkts des zu fertigenden Teils (100) sind.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass es weitere folgende Schritte aufweist:
    Bereitstellen erster Quersitze (15, 25) in den jeweiligen Halbformen (10, 20), angeordnet an derartigen Stellen, dass die abgewandten Enden aus der Halbform (10, 20) bzw. in das Innere des mittleren Lochs (12, 22) führen;
    Einführen eines Stifts (55), der in der Lage ist, während des Gießvorgangs die Bildung eines Querlochs (120) hervorzurufen, welches von der Seitenfläche (100a) durch das Teil (100) zum Inneren des vertikalen Durchgangslochs (110) führt, in den Sitz (15, 25).
  4. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das Teil das Gehäuse (100) einer Uhr ist.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass das vertikale Durchgangsloch (110) bezüglich des Gehäuses (100) zentriert ist.
  6. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass das vertikale Durchgangsloch (110) ein Vorloch ist, welches auf die Größe des darin unterzubringenden Uhrwerks aufweitbar ist.
  7. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass das Quer-Durchgangsloch der Sitz für die die Zeiger der Uhr betätigenden Spindel (130a) ist.
  8. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass es die folgenden weiteren Schritte umfasst:
    Bereitstellen zweiter Quersitze, die durch die jeweiligen Halbformen (10, 20) in Querrichtung (Y-Y) an einer Stelle verlaufen, die den Armbandhalterungen (101) entspricht;
    Einführen eines Stifts (55), der während des Gießvorgangs in der Lage ist, die Ausbildung eines Querlochs (120) hervorzurufen, welches durch die Armbandhalterungen (101) verläuft, um in diesen einen Durchgangssitz (101a) zu bilden, in die Sitze (155).
  9. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Becher (33) zum Aufnehmen des Porzellans (P) einstückig mit dem rohrförmigen Element (31) ausgebildet ist.
  10. Werkzeug für Formen zum Fertigen von Porzellanartikeln mit mindestens einem Durchgangsloch (110), umfassend ein rohrförmiges Element (31), welches an den einander abgewandten Enden offen ist und mit ersten oberen Löchern (32a) und zweiten unteren Löchern (32b) in der Seitenfläche des Rohrs (31) in geeigneten Abständen bezüglich der jeweiligen abgewandten Enden des Rohrs ausgestattet ist, dadurch gekennzeichnet, dass das rohrförmige Element (31) einem Becher (33) zum Aufnehmen des Gemischs (P) von Flüssigporzellan zugeordnet ist, in dessen oberen Teil angeordnet ist, und dass die oberen radialen Löcher (32a) des rohrförmigen Elements in einem geeigneten Abstand in vertikaler Richtung (Z-Z) gegenüber in dem Boden des Bechers (33) angeordnet und in der Lage sind, den Eintritt des Porzellans (P) in das Innere des rohrförmigen Elements zu veranlassen.
  11. Form zum Fertigen von Porzellanartikeln (100) mit mindestens einem Durchgangsloch (110), dadurch gekennzeichnet, dass sie aufweist:
    - eine untere Halbform (10) mit einem Halbsitz (11) einer der Form des zu erhaltenden Artikels entsprechenden Form, wobei die untere Halbform (10) mit einem Sackloch (12) mit vertikaler Achse innerhalb des unteren Halbsitzes (11) ausgestattet ist;
    - eine obere Halbform (20) mit einem Halbsitz (21) einer der Form des zu erhaltenden Artikels entsprechenden Form, wobei die obere Halbform in sich ein mit dem Sackloch (12) der unteren Halbform koaxiales Durchgangsloch (22) ausgebildet hat;
    - ein Werkzeug gemäß Anspruch 10 und koaxial einsetzbar in das obere Durchgangsloch (22) und das Sackloch (12), um das Flüssigporzellan (P) den Halbsitzen (11, 21) zuzuführen, dass die unteren radialen Löcher (32b) des rohrförmigen Elements in vertikaler Richtung in einem Abstand (Z-Z) von dem Boden des Sacklochs (33) in der Weise angeordnet sind, dass sie in das Innere des Sitzes (11, 21) zum Gießen des zu erhaltenden Artikels münden.
  12. Form nach Anspruch 11, dadurch gekennzeichnet, dass der Becher (33) einstückig mit dem rohrförmigen Element (31) ausgebildet ist.
  13. Form nach Anspruch 11, dadurch gekennzeichnet, dass die Sitze (11, 21) in der Art eines Uhrgehäuses (100) geformt sind.
  14. Form nach Anspruch 13, dadurch gekennzeichnet, dass das vertikale Durchgangsloch (110) bezüglich des Gehäuses (100) zentriert ist.
  15. Form nach Anspruch 11, dadurch gekennzeichnet, dass sie erste Quersitze (15, 25) aufweist, die in den jeweiligen Halbformen (10, 20) ausgebildet und an solchen Stellen angeordnet sind, dass die einander abgewandten Enden zur Außenseite der jeweiligen Halbformen und in das Innere des Mittellochs (12, 22) münden, wobei die Sitze in der Lage sind, einen entsprechenden Stift (55a) aufzunehmen, der in der Lage ist, während des Gießvorgangs die Ausbildung eines Querlochs (120) zu veranlassen, welches von der Seitenfläche (100a) durch den Artikel (100) zum Inneren des vertikalen Durchgangslochs (110) verläuft.
  16. Form nach Anspruch 13, dadurch gekennzeichnet, dass sie zweite Quersitze (155) aufweist, die durch die jeweiligen Halbformen (10, 20) in Querrichtung an einem Ort verlaufen, der demjenigen der Armbandhalterungen (101) entspricht, wobei die für einen entsprechenden Stift (155a) geeigneten Sitze in der Lage sind, während des Gießvorgangs die Ausbildung eines Querlochs (120) hervorzurufen, welches durch die Halterungen (101) verläuft, um in ihnen einen Durchgangssitz (101a) auszubilden.
EP07734257A 2006-03-31 2007-03-28 Verfahren und zugehörige(s) form und werkzeug zur herstellung von porzellanobjekten mit mindestens einem durchgangsloch Not-in-force EP2001644B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000631A ITMI20060631A1 (it) 2006-03-31 2006-03-31 Procedimento e relativi stampo ed utensile per la realizzazione di oggetti in porcellana di almeno un foro passante
PCT/IB2007/000938 WO2008004040A2 (en) 2006-03-31 2007-03-28 Method and associated mould and tool for producing porcelain objects with at least one through-hole

Publications (2)

Publication Number Publication Date
EP2001644A2 EP2001644A2 (de) 2008-12-17
EP2001644B1 true EP2001644B1 (de) 2011-10-19

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EP07734257A Not-in-force EP2001644B1 (de) 2006-03-31 2007-03-28 Verfahren und zugehörige(s) form und werkzeug zur herstellung von porzellanobjekten mit mindestens einem durchgangsloch

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EP (1) EP2001644B1 (de)
AT (1) ATE529234T1 (de)
ES (1) ES2375276T3 (de)
IT (1) ITMI20060631A1 (de)
WO (1) WO2008004040A2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1393484B1 (it) * 2009-03-31 2012-04-27 Sacmi Stampo per la realizzazione di manufatti ceramici.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB313325A (en) 1926-07-02 1929-06-13 Arthur Oswin Austin Method and apparatus for casting ceramic pieces
JPH07191156A (ja) 1993-12-27 1995-07-28 Kyocera Corp ジルコニア製腕時計用ケースおよびジルコニアセラミックスの射出成形方法
CN1394352A (zh) * 2000-11-01 2003-01-29 皇家菲利浦电子有限公司 制造一种灯的方法

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Publication number Publication date
ITMI20060631A1 (it) 2007-10-01
ATE529234T1 (de) 2011-11-15
WO2008004040A3 (en) 2008-06-12
ES2375276T3 (es) 2012-02-28
EP2001644A2 (de) 2008-12-17
WO2008004040A2 (en) 2008-01-10

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