EP1781454A1 - Method and press for simultaneously forming and decorating ceramic articles - Google Patents
Method and press for simultaneously forming and decorating ceramic articlesInfo
- Publication number
- EP1781454A1 EP1781454A1 EP05767768A EP05767768A EP1781454A1 EP 1781454 A1 EP1781454 A1 EP 1781454A1 EP 05767768 A EP05767768 A EP 05767768A EP 05767768 A EP05767768 A EP 05767768A EP 1781454 A1 EP1781454 A1 EP 1781454A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- punch
- membrane
- press
- ceramic
- cavity
- 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
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000000919 ceramic Substances 0.000 title claims abstract description 35
- 239000012528 membrane Substances 0.000 claims abstract description 58
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims abstract 4
- 238000007906 compression Methods 0.000 claims abstract 4
- 238000005034 decoration Methods 0.000 claims description 25
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 16
- 239000003086 colorant Substances 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 238000012546 transfer Methods 0.000 description 12
- 238000013461 design Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000004144 decalcomania Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- PLXMOAALOJOTIY-FPTXNFDTSA-N Aesculin Natural products OC[C@@H]1[C@@H](O)[C@H](O)[C@@H](O)[C@H](O)[C@H]1Oc2cc3C=CC(=O)Oc3cc2O PLXMOAALOJOTIY-FPTXNFDTSA-N 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 235000015895 biscuits Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000012940 design transfer Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052572 stoneware Inorganic materials 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/001—Applying decorations on shaped articles, e.g. by painting
-
- 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
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
- B28B13/022—Feeding several successive layers, optionally of different materials
-
- 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
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0285—Feeding the unshaped material to moulds or apparatus for producing shaped articles the material being prearranged on a sheet, e.g. using a decal
-
- 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
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/003—Pressing by means acting upon the material via flexible mould wall parts, e.g. by means of inflatable cores, isostatic presses
Definitions
- the present invention relates to a method and press for simultaneously forming and decorating ceramic articles.
- the present invention relates to a method and press for simultaneously forming and decorating crockery, such as ceramic plates.
- Ceramic articles can be decorated by a known multiplicity of methods, such as decalcomania transfer, manual or automatic brush painting, direct silkscreen printing and tampography.
- This method enables polychrome decoration to be carried out, but involves a certain operational slowness and a very high cost.
- decoration by decalcomania transfer does not allow subsequent application of glaze, which would make the decoration resistant to abrasion.
- Decoration by manual or automatic brush painting consists substantially of applying the design to the ceramic biscuit by a brush.
- This method which also enables polychrome decoration to be obtained, is mainly used for very simple designs or for craft-type production.
- Decoration of ceramic articles by direct silkscreen printing consists of applying to the article to be decorated a "screen", the meshes of which can be traversed by the colour only in correspondence with the design to be reproduced. Using a doctor blade or other known system, the colour is applied to the screen only in correspondence with the design, to deposit directly on the article to be decorated.
- This method can be used only for decorating flat or slightly convex articles or flat or regular parts of an article, and hence limits the decoration to the central region or rim of the plate.
- Decorative tampography uses sliconized elastic pads to transfer an ink film from an engraved plate (printing plate) to the surface of a finished article.
- the decorative pad method is of very low cost and enables monochrome decorations or images to be very easily applied to serial articles, even on concave or convex surfaces such as those of crockery, in particular plates, however it presents difficulties of application to articles of polygonal shape.
- the object of the present invention is to provide a method for forming and decorating ceramic articles which enables said requirements to be satisfied while at the same time obviating the stated drawbacks of the known art, together with a press for implementing said method.
- This object is attained by a method for simultaneously forming and decorating ceramic articles in accordance with claim 1 , and a press in accordance with claim 13.
- Figure 3 is a perspective view of a detail of the press of Figure 2;
- Figure 4 is a plan view of a part of the press of Figure 2;
- Figures 5 and 6 are a schematic vertical section through the press, shown in its spaced-apart and close-together position respectively.
- MODE FOR CARRYING OUT THE INVENTION With reference to said figures, the reference numeral 1 indicates overall a press for simultaneously forming and decorating ceramic articles in accordance with the present invention.
- the term "decoration" in the present invention means any effect which embellishes an article, whether in the form of a design, lines or colours.
- the press 1 comprises essentially a first punch 2 and a second punch 3 mutually movable towards and away from each other between a spaced- apart position ( Figures 1-5) and a close-together position ( Figure 6).
- the press presents two pairs of punches, however a press of the present invention can be constructed with any number of pairs of punches.
- the first punch 2 is the fixed punch whereas the second punch 3 is the movable punch, they moving horizontally, however any other mode of relative movement can be used, such as vertically movable punches.
- any other mode of relative movement can be used, such as vertically movable punches.
- explicit reference will be made to the formation and decoration of a plate, however any other ceramic article, in particular crockery, can be formed. Again, any other decorated ceramic product can be formed, such as tiles.
- the fixed punch 2, to the left in the figures, and the movable punch 3, to the right in the figures present their respective facing surfaces shaped to mould a plate, for example of the deep-bottomed type, with its concavity facing the fixed punch 2.
- annular frame 5 also called simply a ring
- annular frame 5 is mounted as an exact fit over the fixed punch 2, and is generally of steel or other material, possibly clad with a plastic material and provided with an elastically deformable membrane 6 fixed to the ring 5.
- the manner in which the ring 5 (with membrane 6) is drawn over the fixed punch 2 is chosen on the basis of the press used and the direction along which the movable punch 3 moves, whether horizontally or vertically. A preferred manner is described in greater detail hereinafter.
- the circular rim 2a of the fixed punch 2 is depressed with respect to its flat central portion 2b in order to create the concavity in the plate, hence the membrane 6 undergoes deformation to adhere at least to the central portion 2b of the punch 2, whereas between the circular rim 2b of the punch 2 and the annular portion of the membrane 6 close to the ring 5 the adherence is not perfect.
- the fixed punch 2 in order to obtain complete adherence between the membrane 6 and the fixed punch 2, is constructed of selectively porous material to enable a vacuum to be formed between the membrane 6 and the punch 2 by an air suction system.
- the fixed punch 2 is constructed of porous resin of the type traditionally used for die casting moulds, and hence known in the sector. In addition to ensuring the necessary permeability to apply vacuum through the punch 2, this resin also presents the necessary strength for operating at relatively high pressures.
- decorative material is applied to that side of the membrane 6 opposite the side directly adhering to the fixed punch 2, i.e. the side facing rightwards in the figures, and which in the example is ceramic colouring generally in the form of silkscreen paste, to suitably reproduce the design to be transferred.
- the plate is simultaneously formed and decorated by advancing the movable punch 3 towards the fixed punch 2.
- the shape of the movable punch 3 is identical to the shape required for the rear of the plate, i.e. that part which rests on the table under normal conditions of use.
- the moulding cavity 4 is formed, into which ceramic material in the form of atomized clay is loaded under pressure or by suction. This filling takes place when the two punches 2 and 3 have approached each other to a distance apart such as to form a cavity 4 having a thickness of about 1.5 times the thickness of the final plate required ( Figure 6).
- Said ceramic material is of known type and can for example be stoneware, porcelain, vitreous china, etc., reduced to atomized powder. The atomized powder is loaded by the known method.
- loading takes place through a slit 60 ( Figure 6) formed when in the close-together position.
- the cavity 4 is put under vacuum by known suction means which draw air through two opposing holes 61 provided in the ring 5 and communicating with the cavity 4 when in the close-together position, in order to draw out the air present in the cavity 4.
- the movable punch 3 preferably of isostatic type, carries out pre-pressing to a pressure of about 280-300 bar in order to isolate the cavity 4 and enable an isostatic membrane 7 of rubber to adhere to the powders present in the cavity 4.
- pre-pressing the cavity remains under vacuum to remove the air present in the loaded powders.
- the powders present in the cavity 4, isolated and already free of air, are further pressed by feeding a pressurized fluid, for example oil, behind the isostatic membrane 7, which presses the powders with equal intensity in all directions.
- a pressurized fluid for example oil
- this latter final pressing takes place at an overall pressure of about 400 bar.
- the pressure exerted by the punch 3 on the powders loaded by the known method into the moulding cavity 4 facilitates transfer of the design from the membrane 6, on which it is present, to the inside of the plate, with partial incorporation of the design into the ceramic powders, in the manner of marquetry.
- the decorated surface presents no raised portions typical of decorations of the known art, as the colours are perfectly incorporated.
- the movable punch 3 is withdrawn and the decorated unfired plate is expelled and fed to the trimming line, to be then dried or fired prior to final glazing, when the glaze is applied. In this manner the decoration on the finished plate lies totally under glaze.
- the colours are applied to the membrane by silkscreen printing, which is already known and therefore only mentioned hereinafter.
- the membrane is decorated by successive predetermined passes with known flat silkscreen printing machines, each pass being dedicated to transporting a specific colour, which is dried before application of the next.
- the membrane 6 On termination of all the passes required to apply the desired design, the membrane 6 is subjected to steaming, i.e. it is exposed to steam which enables the silkscreen printing paste present on the membrane 6 to undergo wetting and pass into a substantially liquid state. This allows better transfer of the design during plate formation, as it prevents the silkscreen printing paste from remaining partly adhering to the membrane 6.
- the coloured powders can be mixed with wax-based heat meltable carriers. In this case neither drying after each colour pass nor subsequent steaming of the membrane 6 on termination of colour application and prior to design transfer onto the plate is required, as the wax contained in the heat meltable carriers prevents the powders from remaining attached to the membrane 6.
- the heat meltable powders can be silkscreen printing continuously one on the other.
- the membrane 6 is formed of elastic silicone or polyurethane material. According to a preferred embodiment of the present invention, to further improve the production rate of the press 1 suitable support and transfer means indicated overall by 8 are used to move the ring 5 with membrane
- Said support and transfer means 8 shown for simplicity for a single press, are in the form of a carriage 9 vertically slidable on a pair of parallel guides 10 provided on two corresponding uprights 11 , to which are fixed two pairs of sliders 12 slidable horizontally on two pairs of rails 13 provided on two pairs of fixed crosspieces.
- the fixed crosspieces are positioned horizontally parallel to the direction in which the movable punch 3 moves, in order to be outside the overall profile of the punches 2, 3.
- the carriage 9 is able to execute a vertical movement along the guides 10 and a horizontal movement along the rails 13.
- the carriage 9 supports a pair of upper and lower coupling means ( Figure 1 ), each removably retaining a ring 5 with membrane 6.
- said coupling means are in the form of a magnetic gripping system comprising two parallel bars 15 pivoted to two horizontal elements 16 projecting from the carriage 9, each presenting at its free end a coupling magnet 16.
- a gripping system not shown, using mechanical grippers can be used.
- the support and transfer means 8 act in the following manner: a suitable supply system, not shown for simplicity, and operating in the example from above the punches 2, 3 in order not to constitute a hindrance, places the ring 5 with decorated membrane 6 on the upper coupling means, which by means of the magnets 16 attract two opposing gripping elements 50 projecting from the edge of the ring 5.
- the carriage 9 slides downwards to bring the membrane 6 in correspondence with the forming mould.
- the press 1 is operated so that the isostatic movable punch 3 moves towards the fixed punch 2 to form the cavity into which to inject the atomized ceramic material.
- the isostatic movable punch 3 drags with it the carriage 9 carrying the ring 5, which slides along the rails 13 to bring the membrane 6 against the fixed punch 2, where the ring 5 is drawn over the fixed punch 2 by detaching itself from the magnets 16.
- the ring 5 can be mounted by a mechanical or pneumatic control independent of the movement of the movable punch 3. At this point the close-together position is reached, in which the cavity 4 is defined to be filled with the atomized ceramic powders.
- the membrane 6 is made to adhere completely to the fixed punch 2 by creating a vacuum through the constituent porous material of the fixed punch 2 before loading with the ceramic powders.
- the ceramic material is injected in accordance with the known art to form a decorated plate of the invention.
- the carriage 9 returns the upper coupling means free of the ring 5 with membrane 6, above the punches 2, 3 to receive a new ring 5 with decorated membrane 6, while the lower coupling means are brought to the level of the cavity 4.
- the isostatic punch 3 compresses the powders at high pressure within the cavity until a decorated unfired plate is obtained.
- the isostatic movable punch 3 is then withdrawn from the fixed punch 2 and the magnets 16 of the lower coupling means withdraw the just used ring 5 with membrane 6.
- the carriage 9 is then moved vertically downwards to bring a new ring 5 with decorated membrane 6 in correspondence with the forming mould.
- the method and press for simultaneously forming and decorating ceramic articles according to the present invention satisfy the requirements and overcome the drawbacks described in the introduction to the present description with reference to the known art.
- the method and press of the present invention also enable the following to be achieved: to obtain an aesthetically pleasing decoration as it at least partly penetrates into the ceramic base material to give extremely glossy results and an almost three-dimensional effect; to decorate any surface without limits on shape, whether in bas-relief or high-relief and without limits on usable colours.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000098A ITRE20040098A1 (en) | 2004-08-02 | 2004-08-02 | METHOD AND PRESS FOR SIMULTANEOUS FORMING AND DECORATION OF CERAMIC ARTICLES |
PCT/IB2005/002233 WO2006016223A1 (en) | 2004-08-02 | 2005-07-28 | Method and press for simultaneously forming and decorating ceramic articles |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1781454A1 true EP1781454A1 (en) | 2007-05-09 |
EP1781454B1 EP1781454B1 (en) | 2014-07-16 |
Family
ID=35385751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05767768.4A Active EP1781454B1 (en) | 2004-08-02 | 2005-07-28 | Method and press for simultaneously forming and decorating ceramic articles |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1781454B1 (en) |
CN (1) | CN101001727B (en) |
IT (1) | ITRE20040098A1 (en) |
RU (1) | RU2375173C2 (en) |
WO (1) | WO2006016223A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101856856A (en) * | 2009-04-07 | 2010-10-13 | 康准电子科技(昆山)有限公司 | Intramode stereoscopic pattern molding method and molding goods thereof |
FR2990116A1 (en) * | 2012-05-04 | 2013-11-08 | Sarreguemines Vaisselle | Method for manufacturing plate, involves compressing powder between external surfaces of male and female dies, and arranging parts of surfaces in relief such that top portion part and lower portion part are manufactured in relief |
RU2500543C1 (en) * | 2012-07-26 | 2013-12-10 | Алексей Геннадьевич Гога | Method of production of image on surface of titanium products |
CN103171026B (en) * | 2013-03-25 | 2015-04-01 | 林建新 | Ceramic lamp holder forming machine |
CN103909562B (en) * | 2014-04-08 | 2016-06-15 | 姜建洲 | A kind of Ceramic lamp base forming machine |
PL3169496T3 (en) * | 2014-07-15 | 2021-11-22 | Dorst Technologies Gmbh & Co. Kg | Press arrangement and method for pressing pressed parts |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3207565C2 (en) * | 1982-03-02 | 1985-11-21 | Hutschenreuther Ag, 8672 Selb | Method and device for producing a molding from ceramic mass, in particular from porcelain mass, provided with decorative elements on its surface |
DE3446175C2 (en) * | 1984-12-18 | 1987-04-30 | Gebrüder Netzsch, Maschinenfabrik GmbH & Co, 8672 Selb | Methods and devices for producing decorated ceramic moldings |
JPS6432440A (en) * | 1987-07-27 | 1989-02-02 | Mitsui Petrochemical Ind | Production of substrate for information recording |
CN1048942C (en) * | 1996-11-19 | 2000-02-02 | 罗劲松 | Method for prodn. of colour glazed ceramic by paper-cut decoration |
US20040101619A1 (en) * | 2000-03-30 | 2004-05-27 | Carlo Camorani | Object decoration |
-
2004
- 2004-08-02 IT IT000098A patent/ITRE20040098A1/en unknown
-
2005
- 2005-07-28 RU RU2007106965/03A patent/RU2375173C2/en not_active IP Right Cessation
- 2005-07-28 CN CN2005800251371A patent/CN101001727B/en not_active Expired - Fee Related
- 2005-07-28 WO PCT/IB2005/002233 patent/WO2006016223A1/en active Application Filing
- 2005-07-28 EP EP05767768.4A patent/EP1781454B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2006016223A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2007106965A (en) | 2008-09-10 |
CN101001727A (en) | 2007-07-18 |
WO2006016223A1 (en) | 2006-02-16 |
CN101001727B (en) | 2011-11-09 |
RU2375173C2 (en) | 2009-12-10 |
EP1781454B1 (en) | 2014-07-16 |
ITRE20040098A1 (en) | 2004-11-02 |
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