EP2001644A2 - 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

Info

Publication number
EP2001644A2
EP2001644A2 EP07734257A EP07734257A EP2001644A2 EP 2001644 A2 EP2001644 A2 EP 2001644A2 EP 07734257 A EP07734257 A EP 07734257A EP 07734257 A EP07734257 A EP 07734257A EP 2001644 A2 EP2001644 A2 EP 2001644A2
Authority
EP
European Patent Office
Prior art keywords
hole
mould
seat
porcelain
tubular member
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
EP07734257A
Other languages
English (en)
French (fr)
Other versions
EP2001644B1 (de
Inventor
Renato Attanasio
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2001644A2 publication Critical patent/EP2001644A2/de
Application granted granted Critical
Publication of EP2001644B1 publication Critical patent/EP2001644B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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.
  • This conventional technique although fulfilling its function, is however not suitable for producing objects which require through-holes, as, for example, with watch cases which must have a through-opening inside which the mechanism is inserted.
  • 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 .
  • FIG. 1 is an exploded perspective view of a mould for porcelain objects according to the present invention
  • FIG. 2 is a partially sectioned schematic view of the mould according to Fig. 1 in the open condition;
  • FIG. 3 is a schematic cross-section through the mould according to Fig. 1 in the closed condition, during casting;
  • - Figure 4 is a perspective view of a watch case obtained with the method according to the present invention.
  • FIG. 5 is a partially sectioned schematic view of the watch according to Fig. 4 in the finished condition.
  • 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 matching 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 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 holea 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 holea 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 holes 120 which passes through the case 100 in the direction Y-y from the side surface 100a to the inside of the hole 110 so as to allow, after completion of the processing operations, insertion of the spindle 130a of the crown 130 for operating the hands 140.
  • 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 (Pig.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Insulating Bodies (AREA)
  • Insulators (AREA)
  • Inorganic Insulating Materials (AREA)
  • Ceramic Products (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
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 true EP2001644A2 (de) 2008-12-17
EP2001644B1 EP2001644B1 (de) 2011-10-19

Family

ID=38894929

Family Applications (1)

Application Number Title Priority Date Filing Date
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

Country Status (5)

Country Link
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
EP1334508A1 (de) * 2000-11-01 2003-08-13 Koninklijke Philips Electronics N.V. Verfahren zur herstellung einer lampe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008004040A2 *

Also Published As

Publication number Publication date
ES2375276T3 (es) 2012-02-28
WO2008004040A3 (en) 2008-06-12
EP2001644B1 (de) 2011-10-19
ATE529234T1 (de) 2011-11-15
WO2008004040A2 (en) 2008-01-10
ITMI20060631A1 (it) 2007-10-01

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