EP2639028A1 - Verfahren und Vorrichtung zur Herstellung von keramischen Produkten - Google Patents
Verfahren und Vorrichtung zur Herstellung von keramischen Produkten Download PDFInfo
- Publication number
- EP2639028A1 EP2639028A1 EP13158585.3A EP13158585A EP2639028A1 EP 2639028 A1 EP2639028 A1 EP 2639028A1 EP 13158585 A EP13158585 A EP 13158585A EP 2639028 A1 EP2639028 A1 EP 2639028A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- applying
- joining
- flow
- sanitary ware
- zone
- 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
Links
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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
-
- 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
- B28B1/002—Producing shaped prefabricated articles from the material assembled from preformed elements
Definitions
- the present invention relates to a method and a plant for making ceramic ware products, in particular ceramic sanitary ware products.
- ceramic sanitary ware products are made by pressure casting a liquid mixture, known as slip, consisting of water, clay and very small quantities of other substances, in moulds made of porous resin.
- slip a liquid mixture
- the mould gives the sanitary ware product the required shape and the article is then extracted from the mould in a solid, though plastic, form and further processed according to a well-known sequence of steps until it is completely finished.
- the steps of making the ceramic ware product essentially comprise:
- Some sanitary ware products such as toilet bowls (purely by way of a non-limiting example) comprise at least two parts which can be joined to each other after being demoulded from a single mould or, in some cases, from separate moulds: a first bottom part comprising a pan and a drain siphon (that is, the inner parts of the bowl) and a second top part or "rim".
- the first part consisting of the pan and siphon assembly, is the functional part of the bowl and must have dimensional characteristics such as to allow the collection pan and flushing system of the bowl to work correctly.
- the rim has a portion that is usually annular or ellipsoidal in shape, forming the upper edge of the pan and a rear extension, parallel to the siphon and having a hole through which the flushing water is delivered.
- the operation by which the (two or more) parts are joined is performed with the parts in the state known as the "green" state, that is, while the products still have a high water content of between 14% and 20%, also so as to allow the joined parts to be finished (even using robot units) by smoothing their surfaces to give the finished product a good appearance.
- the sanitary ware product brings about two main changes in the structure/consistency of the article, the first bringing it to an intermediate "leatherhard” state (in which the water content is approximately halved in weight compared to the previous state) and the second, to an almost finished “whitehard” state (in which the water content is further reduced): in these two states, the sanitary ware product is much less subject to plastic deformation than it is when in the green state.
- the most critical situation is that created during the passage of the product from the green state to the leatherhard state, that is to say, the first drying step, which causes contractions in the product due to water loss and, therefore, product shrinkage.
- This invention also has for an aim to provide a plant which implements the method described above and which is very practical, with structures adapted to reduce the risks of cracking, during the drying process, in the zones along which the product parts are joined, all without adding a large number of components in the stations making up the plant.
- a method for making a ceramic sanitary ware product comprising the steps of: applying a uniform layer of bonding material comprising a high-viscosity fluid mixture or slip to at least one surface intended to be joined to at least a second part of the sanitary ware product; joining the second part of the sanitary ware product to the first part along a joining zone defined by two respective contact surfaces of the selfsame parts with the layer of bonding material interposed between them; and drying the sanitary ware product thus obtained.
- the step of joining the second part to the first part there is a step of applying, through the agency of respective means, a flow of electric charge uniformly distributed at least along the joining zone at a predefined power and for a predetermined length of time so as to increase mechanical strength at least at the joining zone.
- the step of applying the flow of electric charge reduces the moisture content around the joining zone.
- the step of applying the flow of electric charge creates uniformity of moisture content around the joining zone.
- the sanitary ware product denoted in its entirety by the letter M, has at least two parts which can be associated with each other after being demoulded from a single mould or from respective separate moulds (not illustrated here), but without thereby limiting the scope of the solution.
- the method for making a ceramic ware product may basically comprise the following traditional steps:
- the product comprises a first bottom part M2 comprising a pan and a drain siphon (that is, the inner parts of the bowl) and a second top part M3 or "rim".
- the first part M2 consisting of the pan and siphon assembly, is the functional part of the bowl and must have dimensional characteristics such as to allow the collection pan and flushing system of the bowl to work correctly.
- the rim M3 has a portion that is usually annular or ellipsoidal in shape, forming the upper edge of the pan and a rear extension, parallel to the siphon and having a hole through which the flushing water is delivered.
- the two parts M2 and M3 may be cast in the same mould (even if separate from each other).
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Producing Shaped Articles From Materials (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13158585T PL2639028T3 (pl) | 2012-03-13 | 2013-03-11 | Sposób i instalacja do wytwarzania wyrobów ceramicznych |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000129A ITBO20120129A1 (it) | 2012-03-13 | 2012-03-13 | Metodo ed impianto per la realizzazione di prodotti in materiale ceramico. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2639028A1 true EP2639028A1 (de) | 2013-09-18 |
EP2639028B1 EP2639028B1 (de) | 2014-04-23 |
Family
ID=46018037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13158585.3A Active EP2639028B1 (de) | 2012-03-13 | 2013-03-11 | Verfahren und Vorrichtung zur Herstellung von keramischen Produkten |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2639028B1 (de) |
ES (1) | ES2478293T3 (de) |
IT (1) | ITBO20120129A1 (de) |
PL (1) | PL2639028T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017017544A1 (en) * | 2015-07-27 | 2017-02-02 | Siti - B&T Group S.P.A. | Plant for the production of ceramic sanitary wares, as well as related method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1057760A (en) * | 1964-10-15 | 1967-02-08 | Erich Netzsch | Mould for the production of a ceramic article in a casting process and a casting method using the mould |
GB2063241A (en) * | 1979-11-20 | 1981-06-03 | Keramik Wtb Veb | Attaching a prefabricated ceramic member to a ceramic body |
EP1273406A2 (de) * | 2001-07-06 | 2003-01-08 | Dorst Maschinen- und Anlagenbau GmbH & Co. | Druckgussanlage zum Herstellen von WC's und Herstellunsverfahren dazu |
-
2012
- 2012-03-13 IT IT000129A patent/ITBO20120129A1/it unknown
-
2013
- 2013-03-11 EP EP13158585.3A patent/EP2639028B1/de active Active
- 2013-03-11 PL PL13158585T patent/PL2639028T3/pl unknown
- 2013-03-11 ES ES13158585.3T patent/ES2478293T3/es active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1057760A (en) * | 1964-10-15 | 1967-02-08 | Erich Netzsch | Mould for the production of a ceramic article in a casting process and a casting method using the mould |
GB2063241A (en) * | 1979-11-20 | 1981-06-03 | Keramik Wtb Veb | Attaching a prefabricated ceramic member to a ceramic body |
EP1273406A2 (de) * | 2001-07-06 | 2003-01-08 | Dorst Maschinen- und Anlagenbau GmbH & Co. | Druckgussanlage zum Herstellen von WC's und Herstellunsverfahren dazu |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017017544A1 (en) * | 2015-07-27 | 2017-02-02 | Siti - B&T Group S.P.A. | Plant for the production of ceramic sanitary wares, as well as related method |
Also Published As
Publication number | Publication date |
---|---|
ES2478293T3 (es) | 2014-07-21 |
PL2639028T3 (pl) | 2014-09-30 |
ITBO20120129A1 (it) | 2013-09-14 |
EP2639028B1 (de) | 2014-04-23 |
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