EP0720896A1 - Form zum isolatischen Pressen - Google Patents

Form zum isolatischen Pressen Download PDF

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Publication number
EP0720896A1
EP0720896A1 EP96200762A EP96200762A EP0720896A1 EP 0720896 A1 EP0720896 A1 EP 0720896A1 EP 96200762 A EP96200762 A EP 96200762A EP 96200762 A EP96200762 A EP 96200762A EP 0720896 A1 EP0720896 A1 EP 0720896A1
Authority
EP
European Patent Office
Prior art keywords
membrane
cavity
die
die means
means according
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
EP96200762A
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English (en)
French (fr)
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EP0720896B1 (de
Inventor
Maris Algeri
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
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Individual
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Publication date
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Priority claimed from ITMO930028A external-priority patent/IT1262594B/it
Priority claimed from ITMO930068 external-priority patent/IT1262621B/it
Priority claimed from ITMO930123A external-priority patent/IT1262666B/it
Priority claimed from ITMO930159A external-priority patent/IT1262688B/it
Application filed by Individual filed Critical Individual
Publication of EP0720896A1 publication Critical patent/EP0720896A1/de
Application granted granted Critical
Publication of EP0720896B1 publication Critical patent/EP0720896B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/346—Manufacture of moulds
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/022—Moulds for compacting material in powder, granular of pasta form
    • B30B15/024—Moulds for compacting material in powder, granular of pasta form using elastic mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/02—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of a flexible element, e.g. diaphragm, urged by fluid pressure

Definitions

  • the invention concerns isostatic die means, suitable for moulding of ceramic tiles, according to the preamble of claim 1.
  • IT-A-1 104 511 relates to a method and a device for achieving uniform pressing of ceramic tiles.
  • the method envisages the application to the free surface of the clay mixture introduced into the opening of the die, during the action of pressing of an elastic moulding surface, or elastic membrane, held in firm contact with the clay mixture, to form one face of the tile, by means of an incompressible fluid: this, to neutralize the effects of zones of disuniform density in the body of the formed tile which would cause uneven shrinkage on firing, with consequent variations in the size, or linearity, of the sides of the tile and/or of the planarity of its surface and with the additional possibility of cracking or breakage.
  • IT-A-1 104 511 have introduced the fundamental concept of an incompressible fluid, for example, oil, acting on an elastic membrane and interposed between the punch and the membrane.
  • an incompressible fluid for example, oil
  • said method and device do not always enable sufficiently flat (back) surfaces, and hence sufficiently uniform tile thickness, to be readily achieved, particularly in the case of large formats.
  • auxiliary punch base with, on its front face, a chessboard-like array of large flat squares surrounded by channels for the distribution of the liquid, communicating with the internal surface of the overlying membrane by means of large, corresponding square alveoli, forming part of an intermediate punch-plate superimposed on said auxiliary punch base; the smooth inner surface of the overlying (vulcanized) membrane is moulded to afford an array of large, flat square protruding bosses surrounded by channels corresponding exactly to the aforesaid configuration of the upper face of said base of auxiliary punch.
  • EP-A-0556163 which is per se an intermediate document but concerns the same type of mould, discloses a mould having a plurality of cavities defined by a lattice to which a membrane is anchored; however the lattice cannot be provided with a membrane obtained by vulcanized elastomeric substance, such as rubber or resin, since, when the liquid elastomeric substance is poured on the lattice, the cavities become completely filled with the elastomeric substance and no room is therefore available for the incompressible fluid.
  • IT-U-214739 discloses a punch for uniform pressing of ceramic tiles, comprising a plurality of cavities among which a lattice is inherenty defined, said cavities containing an incompressible fluid, i. e. oil, and being closed on the side facing the clay mixture to be pressed by means of an elastic membrane, the elastic membrane comprising a central zone and a peripheral zone, those parts of the membrane not covering the cavities being anchored to the body of said punch at respective peripheral and intermediate anchoring zones, each cavity being intermediately occupied by a respective piston and serving as a guide for allowing axial movements of the piston inwardly and outwardly with respect to the cavity.
  • an incompressible fluid i. e. oil
  • Each piston is further externally provided with a seal for the incompressible fluid peripherally engaged with the internal surface of the respective cavity in order to prevent oil from coming into contact with the membrane.
  • the pistons deteriorate the corresponding edges of the membrane when they move into the cavities to compensate disuniform density of the clay mixture.
  • the pistons have to be inserted into the cavities before the liquid elastomeric membrane is poured to coat the face of the punch: therefore a difficulty arises in that the pistons cannot be located at precise axial positions inside the cavity, being it essential, for proper functioning, that each piston be located at intermediate sections of the respective cavity, so that they can be moved outwardly, under the pression of the oil, and also inwardly, under the pression of the clay mixture.
  • the technical problem is therefore to find an isostatic die of the aforesaid type which is exrememly easy to manufacture, by providing it with a vulcanised membrane.
  • a further aspect of the technical problem is to eliminate the complex machining needed on the surface of the punch to create the interconnecting conduits of the alveoli.
  • a further aspect of the technical problem is to allow the manufacture of items, particularly tiles with more or less deep veinings, or cavities, on one face without occasioning, on the opposite face, undesirable differences of lustre due to differences of compactness: this, to reduce the use of material necessary for the manufacture of the item, thereby reducing weight and cutting the costs of manufacture and transport.
  • a further aspect of the technical problem is to control the thickness of the soft layer of powders to be pressed, so as to obtain uniform thickness and density in the body of the pressed tile.
  • the invention solves the above-mentioned technical problem by adopting die means, suitable for isostatic moulding of ceramic tiles, comprising two dies, punch and matrix, at least one die having a cavity containing an incompressible fluid flowable through corresponding passageways, said cavity being closed on the side facing the clay mixture to be pressed by means of an elastic membrane, said elastic membrane comprising central anchoring zones and a peripheral anchoring zone, said central anchoring zones and peripheral anchoring zone being anchored to the body of said die, characterised in that , said central anchoring zones are reciprocally isolated so that said passageways are defined between each central anchoring zone and adjacent central and/or peripheral anchoring zones, and in that said membrane is anchored to said body in said zones.
  • a moulding plate is interposed between said membrane and the bottom of said cavity, said moulding plate having a plurality of through-apertures, in such a way that said membrane is anchored to said plate in the zones defining the border of said apertures.
  • the moulding plate has the additional function of allowing the distribution of the incompressible fluid in the cavity of the relative die. It is to be noted, furthermore, that, on completion of the membrane-shaping process, the moulding plate may be eliminated, for example, by a chemical process, whereby a substance that will corrode said plate, but not the membrane, is introduced into the cavity, or by a physical process, whereby, for example, the die is heated to a temperature at which the plate melts, while the membrane remains firmly attached to the cavity.
  • the surface of the plate facing the bottom of the cavity is preferably treated with an adhesive, while the opposite surface is treated with a non-stick agent to prevent the membrane from adhering to it.
  • said anchoring zones are defined by non-communicating groove-shaped zones located in the bottom of said cavity; said anchoring zones being advantageously spread with adhesive to ensure that the membrane adheres to them.
  • the distribution of the grooves can be based on an labyrinth pattern so designed as to determine areas of membrane anchorage delimiting a formation of communicating chambers in the cavity of the semi-die, destined to receive the incompressible fluid.
  • holes for the introduction and discharge of the incompressible fluid are provided in the mould, said holes protruding from the bottom of the cavity through a spot-facing that can be blocked with a plug during the moulding of the elastic membrane, the plug remaining partially incorporated in the membrane itself.
  • those areas of the bottom of the cavity where the membrane should not adhere can be sheathed in plastic, or paper, with holes punched where said apertures occur.
  • the cavity communicates with a regulating device for regulating the volume of fluid in the cavity.
  • Said regulating device being such as to enable the ratio between the thickness of the unpressed powders and that of the powders after pressing to remain virtually constant throughout the pressed clay body.
  • the regulating device is operated as follows:
  • the ratio between the initial maximum and minimum thicknesses of the layer of powders and the ratio between the maximum and minimum thicknesses of said layer remains substantially constant during the pressing cycle and corresponds to that which is to be achieved in the formed tile.
  • the advantages offered by this invention are: lower manufacturing costs; lower running costs; possibility of renovating the die; improved functionality; possibility of adopting various, not only square, designs; maximum stability in the areas of adhesion; possibility of transforming traditional punches, even if en bloc, into punches according to the invention by the simple application of a distributing plate to, or above, the active surface of the punch itself; possibility of more efficient moulding of the membrane; possibility of greater control over the flexing of the membrane, reduction in surface defects; ease of removal of pressed items, facilitated particularly with the adoption of the device regulating the volume of fluid.
  • the Figures show: 1, a plate, for example, having a thickness ranging from a few tenths of a millimeter to a few millimeters, depending also on the dimensions of the tiles, glued or however coupled to the active face of punch P, corresponding to the back of the tile, having through-apertures with tapered raised edges 2 - for example, of the order of a millimeter, or part thereof - for example, advantageously in the shape of a rounded slot.
  • the apertures are suitably spaced to anchor the elastic material of the membrane and have lengths, by way of example, of a few centimeters and widths of a few millimeters; the said apertures being distributed in relief inside a tray V having interconnecting chambers distributed around the said raised edges.
  • the set of edges 2 of the said apertures lying preferably on a plane parallel to that of the said plate constituting the base of the said tray.
  • a number of risers 3, or keys, can be fixed to the said active face of the punch, each riser being inserted in a said slot and with its extremities coupled to those of the slot itself, whereas the sides of the risers remain clear of the corresponding edges of the said slots with a clearance 4 of at least a few tenths of a millimeter, sufficient to permit the passage of the filling material - for example, vulcanized rubber - that is to constitute the elastic element, or elastic membrane 5, the membrane adapting itself to the disuniformity of the mass of mixture placed in the mould of the die to obtain a uniform compression in the mass itself, in its every point during pressing.
  • Elastic membrane 5 also having indentations 6, 6a formed during moulding by corresponding bosses 7 on moulding matrix 8 of membrane 5 ( Figure 3).
  • Membrane 5 also having an indented peripheral border 9 whose base is coplanar with those of indentations 6 that, during pressing, form the so called “feet” or support ribs on the back of the tile, or their complements.
  • holes 10 for the introduction of liquid 11, for example oil, in tray V, after the membrane has been moulded, after the possible chemical disintegration and/or physical elimination of the material of the plate, for example, by making use of the same hole; hole 10 being closeable with plug 12 to prevent it from becoming filled with the material the membrane is made of when it is poured or else when it is being moulded.
  • the plug itself - for example, cylindrical - penetrates in a corresponding hole in plate 1, when still in situ, and, together with one or more other analogous plugs, act as a reference pin for the plate.
  • Figure 4 shows: 14, the tile being formed; 8, the buffer plate constituting the base of the matrix of the die, whose external face corresponds to the flat top face of the tile; 15, one of the walls of a mould or cavity of the die; 16, 17 ( Figures 5 and 6) elastic membranes having a different design to that of membrane 5 of the first Figures; 16a, 17a, indentations in the external face of elastic membrane 16 and 17: respectively with apertures 16b of tray V in relation to indentations 16a; 18, ( Figures 8 and 9) a flat plate positioned above, distanced from, active surface 19 of punch P, which can be seen through apertures 20: said plate being treated with non-stick agent; 21, a gasket for liquids in a seat obtained in the body of the punch P; 22, the base of punch P; 23, an externally conical bush inserted in hole 24 of punch P during assembly to fit tightly, with a wet seal, the lower inlet of hole 25 obtained in the lower part of tubular appendage 26 made of the same material as the elastic membrane by
  • the moulding of the elastic membrane is as follows: tray V, having been obtained by blanking and drawing or by pressing, or even simply by blanking in the case of the flat plate 18, its surface facing the membrane having been treated with a non-stick agent, is placed on the upper surface of punch P, positioning it by means of suitable pins 12 (not shown in Figure 9), subsequently also acting as plugs, otherwise glueing it on or keeping it raised to permit the penetration beneath it of the elastic material during moulding that also has to be present in punch P; having inserted, where necessary, keys 3, covered in adhesive material, as with the other surfaces that can come into contact with the material as it is poured through the apertures, the elastic material making up membrane 5, or membranes 16, 17 is then poured, either cold or heated: this, in such a way so that the said material infiltrates through the clearances 4 to fill even the interstices existing between the external surface of the punch and the external surface of the tray and remaining stuck to it; the surface of the elastic membrane that moulds the back of the tile during pressing being shaped, with in situ
  • the Figures also show: 101 (Figure 11), the top face of punch P having anchorage grooves 102, even having sides diverging downwards thereby creating undercut, covered with adhesive substance, and peripheral frame 103 with internal face similarly treated: grooves 102 being filled by appendages 103a of the elastic membrane; 104, grooves on the external surface of elastic membrane 5 vulcanized in situ, reproducing in relief the design of the back of the tile to be formed; 106, a metallic tablet, partially incorporated, for vulcanizing the internal surface of membrane 5 in relation of hole 107 for the supply of liquid 11 to chambers 108, or interconnected cavities (Figure 12), protruding from the said internal surface and fitting, creating a seal against the poured material, in spot facing 109 that is the upper enlargement of the said hole: said tablet advantageously being tapered to be held with undercut in the elastic membrane to enable the instantaneous flow of the liquid as soon as it is opened; 110 ( Figure 14), a sheet of non-stick material.
  • the elastic membrane can be stiffened transversely by means of, advantageously, inextensible fibres inserted in it, during vulcanization: this prevents marked undulation, whilst conserving longitudinal elasticity.
  • feet or ribs on the back of the tile can be of any other convenient form, for example, even of the type having cells in the form of a honeycomb.
  • the punch can perform the function of the baffle plate and vice-versa.
  • the Figures also show: 201 (Figure 15), the punch which is made to enter into matrix 202 to compress the mixture 204, wet or even dry, against the baffle plate 203; 5, an elastic membrane, or elastic element, to contain the body of liquid 11 interposed so as to fill interconnecting cavities between the membrane itself and the top face of baffle plate 203; 207, support ribbing on the back of the tile in relation to the corresponding protuberances 208 of the internal surface of the membrane 5.
  • the protuberances are anchored by vulcanization, and/or glueing, in the hollows 209 of the top face of baffle plate 203; 210, an inlet and outlet channel for the fluid communicating with above mentioned cavities, originating from tube 211 connected to chamber 212 of the cylinder 213, for example, double acting.
  • a piston, 214, of cylinder 213 is activated by pressurized inert gas in tank 215 that constitutes the liquid volume regulator, the tank being connected to the other chamber 216 by means of tube 217.
  • Each chamber 212, 216 advantageously for shock absorption, being filled with liquid; 218, 219, 220, 221 respectively, the two opposing end covers of the cylinder and corresponding stroke limiting elements for piston 214, in other words calibration devices in function of the volume of liquid to expel and to re-absorb; 222, a throttling and closing control mechanism, for example, a solenoid valve, inserted in tube 211; 223 ( Figure 16) the formed tile.
  • Figure 17 shows: 224, a cylinder, whose piston 225, as with 213 but single acting, separates liquid chamber 226 from chamber 227 having return spring 228; 229, the punch having channel 230 for the introduction of the liquid in interconnected cavities 231, enclosed between punch 229 and membrane 5; 232, the earth or powder, dry or wet, with which the tile is formed; 233 a projection of the powder 232 above the closing line of the matrix, that is created at the beginning of the pressing due to the entry of protuberances of membrane 5 into the body of powder 232; 234, the punch.
  • Figures 15 and 16 show respectively: A, B the starting thicknesses, maximum and minimum, of the body of powder to be pressed and A', B' the final thicknesses.
  • the volume regulating device can, however, be of a different type to those indicated and in whichever way adjustable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Compositions Of Oxide Ceramics (AREA)
EP96200762A 1993-03-17 1994-03-11 Form zum isolatischen Pressen Revoked EP0720896B1 (de)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
ITMO930028A IT1262594B (it) 1993-03-17 1993-03-17 Stampo atto a rendere uniforme la pressatura nelle piastrelle ceramiche.
ITMO930028 1993-03-17
ITMO930068 IT1262621B (it) 1993-05-21 1993-05-21 Perfezionamenti negli stampi per la pressatura uniforme delle piastrelle ceramiche.
ITMO930068 1993-05-21
ITMO930123 1993-09-29
ITMO930123A IT1262666B (it) 1993-09-29 1993-09-29 Stampo per la pressatura isostatica, particolarmente di piastrelle ceramiche a nervature profonde.
ITMO930159A IT1262688B (it) 1993-12-15 1993-12-15 Stampo perfezionato per la pressatura uniforme di piastrelle ceramiche
ITMO930159 1993-12-15
EP94200624A EP0620089B1 (de) 1993-03-17 1994-03-11 Verfahren und Form zum isostatischen Pressen, insbesondere zum Herstellen von Keramikfliesen

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP94200624.8 Division 1994-03-11

Publications (2)

Publication Number Publication Date
EP0720896A1 true EP0720896A1 (de) 1996-07-10
EP0720896B1 EP0720896B1 (de) 1997-12-03

Family

ID=27453044

Family Applications (3)

Application Number Title Priority Date Filing Date
EP94200624A Expired - Lifetime EP0620089B1 (de) 1993-03-17 1994-03-11 Verfahren und Form zum isostatischen Pressen, insbesondere zum Herstellen von Keramikfliesen
EP96201446A Expired - Lifetime EP0736363B1 (de) 1993-03-17 1994-03-11 Form, insbesondere zum Pressen von Keramikfliesen
EP96200762A Revoked EP0720896B1 (de) 1993-03-17 1994-03-11 Form zum isolatischen Pressen

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP94200624A Expired - Lifetime EP0620089B1 (de) 1993-03-17 1994-03-11 Verfahren und Form zum isostatischen Pressen, insbesondere zum Herstellen von Keramikfliesen
EP96201446A Expired - Lifetime EP0736363B1 (de) 1993-03-17 1994-03-11 Form, insbesondere zum Pressen von Keramikfliesen

Country Status (4)

Country Link
EP (3) EP0620089B1 (de)
AT (1) ATE146115T1 (de)
DE (1) DE69401084T2 (de)
ES (3) ES2112073T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19731146C1 (de) * 1997-07-21 1999-02-25 Dietrich Engmann Isostatischer Preßstempel zum Herstellen keramischer Fliesenrohlinge und Presse mit diesem Preßstempel
ES2181514A1 (es) * 1999-07-15 2003-02-16 Rodriguez Constantino Parra Dispositivo para regular la compactacion en punzones para prensas.

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1269262B (it) * 1994-09-13 1997-03-26 Maris Algeri Stampo isobarico per la pressatura di piastrelle ceramiche, e metodo relativo
EP0759346B1 (de) * 1995-08-18 2001-11-21 Carlo Antonio Camorani Form zur isostatischen Pressen
IT1279893B1 (it) * 1995-12-18 1997-12-18 F D S S R L Semistampo per piastrelle ceramiche perfezionato
DE19629413A1 (de) * 1996-07-22 1998-01-29 Erlus Baustoffwerke Keramischer Falzdachziegel
EP1008438B2 (de) * 1998-12-09 2009-11-25 System S.p.A. Rahmenanordnung in Pressen, insbesondere in Pressen für die Herstellung von Keramikgegenständen
ITRE20050033A1 (it) * 2005-03-25 2006-09-26 Cbm Srl Punzone ceramico tipo marca
ITBO20050268A1 (it) * 2005-04-21 2006-10-22 Trebax Srl Stampo per la fabbricazione di piastrelle ceramiche
ITMI20070298A1 (it) * 2007-02-16 2008-08-17 Martinelli Ettore Srl Tampone isostatico per la pessatura di piastrelle e relativo metodo di fabbricazione
ITMO20080040A1 (it) * 2008-02-15 2009-08-16 Sacmi Apparato e metodo di pressatura
IT1396712B1 (it) * 2009-11-18 2012-12-14 Ferrari Carlo Societa Per Azioni Off Punzone isostatico per piastrelle.
ITRM20100294A1 (it) * 2010-05-31 2011-12-01 Mass Spa "metodo e stampo per la formatura di manufatti ad uso civile ed ornamentale"
IT1400599B1 (it) 2010-06-18 2013-06-14 Trebax S R L Stampo per fabbricare manufatti ceramici.
ITMO20110174A1 (it) * 2011-07-18 2013-01-19 Gape Due S P A Stampo isostatico, particolarmente per piastrelle ceramiche
ITMI20111917A1 (it) 2011-10-24 2013-04-25 Martinelli Ettore Srl Tampone adattativo per la pressatura di prodotti ceramici, quali piastrelle e simili
ITPD20120277A1 (it) * 2012-09-20 2014-03-21 Mass Spa Stampo per piastrelle
ITMI20131699A1 (it) * 2013-10-15 2015-04-16 Martinelli Ettore Srl Tampone isostatico di pressatura per la produzione di piastrelle e simili e metodo di realizzazione
IT201600079937A1 (it) * 2016-07-29 2018-01-29 I Dea Re S R L Tampone per la formatura di piastrelle
CN107139315A (zh) * 2017-01-23 2017-09-08 佛山市新鹏工业服务有限公司 瓷砖成型液压模具
IT201700036509A1 (it) * 2017-04-03 2018-10-03 I Dea Re S R L Tampone isostatico per la formatura di piastrelle
ES2745575A1 (es) * 2018-08-30 2020-03-02 Asitec Ceram S L Punzon isostatico
IT201900002749A1 (it) * 2019-02-26 2020-08-26 Officina Ferrari Carlo Spa Tampone per la pressatura di polveri
IT202100014210A1 (it) * 2021-05-31 2022-12-01 Annovi S R L Tampone isostatico per la pressatura di polveri ceramiche

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370120A (en) * 1978-11-28 1983-01-25 Foster Robert D Compacting press with expandable body
US4937025A (en) * 1987-09-30 1990-06-26 Hydra Corporation Molding apparatus and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1160590A (en) * 1967-03-20 1969-08-06 Yuken Kogyo Co Ltd An improved method and apparatus for the manufacture of Dish-Shaped Ceramic Articles
IT1234151B (it) * 1989-05-30 1992-05-04 Mass Spa Metodo per la coniatura di piastrelle ceramiche uniformemente compattate, mezzi per attuare il detto e piastrelle cosi' ottenute
IT1240242B (it) * 1992-02-12 1993-11-30 Sichenia Gruppo Ceramiche S.P.A. Stampo per piastrelle ceramiche
IT1258686B (it) * 1992-05-15 1996-02-27 Mass Spa Tampone ceramico tipo muratura

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370120A (en) * 1978-11-28 1983-01-25 Foster Robert D Compacting press with expandable body
US4937025A (en) * 1987-09-30 1990-06-26 Hydra Corporation Molding apparatus and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19731146C1 (de) * 1997-07-21 1999-02-25 Dietrich Engmann Isostatischer Preßstempel zum Herstellen keramischer Fliesenrohlinge und Presse mit diesem Preßstempel
ES2181514A1 (es) * 1999-07-15 2003-02-16 Rodriguez Constantino Parra Dispositivo para regular la compactacion en punzones para prensas.

Also Published As

Publication number Publication date
ES2111409T3 (es) 1998-03-01
EP0736363A3 (de) 1997-02-05
EP0736363B1 (de) 1997-12-03
DE69401084D1 (de) 1997-01-23
ES2112073T3 (es) 1998-03-16
EP0620089A3 (de) 1995-03-15
EP0620089B1 (de) 1996-12-11
EP0720896B1 (de) 1997-12-03
EP0620089A2 (de) 1994-10-19
DE69401084T2 (de) 1997-07-10
ES2097607T3 (es) 1997-04-01
ATE146115T1 (de) 1996-12-15
EP0736363A2 (de) 1996-10-09

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