EP1704975A2 - Poinçon de presse pour formage dûne surface de pièces en céramique - Google Patents

Poinçon de presse pour formage dûne surface de pièces en céramique Download PDF

Info

Publication number
EP1704975A2
EP1704975A2 EP06075328A EP06075328A EP1704975A2 EP 1704975 A2 EP1704975 A2 EP 1704975A2 EP 06075328 A EP06075328 A EP 06075328A EP 06075328 A EP06075328 A EP 06075328A EP 1704975 A2 EP1704975 A2 EP 1704975A2
Authority
EP
European Patent Office
Prior art keywords
ribs
grooves
lattice
membrane
punch
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.)
Withdrawn
Application number
EP06075328A
Other languages
German (de)
English (en)
Other versions
EP1704975A3 (fr
Inventor
Paolo Bosi
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.)
CBM SRL
Original Assignee
CBM SRL
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 CBM SRL filed Critical CBM SRL
Publication of EP1704975A2 publication Critical patent/EP1704975A2/fr
Publication of EP1704975A3 publication Critical patent/EP1704975A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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 finding refers, in a totally general sense, to moulds for forming ceramic tiles, and, more specifically, it concerns a punch intended to be associated with the forming cavities of said moulds.
  • normal ceramic moulds comprise at least one forming cavity provided to contain the initial powdered material (or materials), in which a bottom punch is slidably received with which an overlying punch collaborates carried by the vertically mobile crossmember of the press.
  • the finding refers to a punch of the stamp type, in other words intended to coin the back (or fixing) face of tiles, in the jargon the "masonry" side.
  • Said defects generally result in a corresponding nonhomogeneous or irregular density of the raw tile, which at the end of the drying and firing cycle has defects in size, shape and flatness, and sometimes they actually break and/or crack resulting from the differentiated thermal expansions in the firing step and from the corresponding differentiated shrinkage in the cooling step.
  • Isostatic punches comprise, in brief, a metallic body equipped with a cavity closed by an elastic membrane and filled with an incompressible fluid, generally hydraulic oil.
  • the active face of said membrane is equipped with impressions for the shaping of the so-called feet of the tile.
  • said cavity comprises a series of communicating cells that open out onto the face of the body covered by the membrane, where they provide a lattice with flat edges to which the membrane is fixed, said edges being arranged at said feet.
  • Said effect consists of the fact that a trace, even if often light, of the feet situated at the back on the fixing face of said tiles remains on the visible front face of the tiles, which is generally a consequence of the fact that the powder, at the lattice that rigidly supports the membrane behind the feet, is more compact.
  • the main purpose of the present finding is to provide a punch of the stamp type that has the typical properties of isostatic punches, and that at the same time is able to practically eliminate said transparency effect, and at the same time provide the tile with a perfectly flat support during firing.
  • Another purpose of the finding is to achieve said result in the context of a simple, rational, reliable, strong and cost-effective constructive solution.
  • the punch comprises a metallic body 1 that is intended to be fixed in a known way to a respective support element of a ceramic mould that is equally known.
  • the body 1 is square-shaped in plan (see FIG. 1), but obviously said shape in plan can be whatever.
  • a concentric cavity 3 of differentiated depth is formed on the active face 2 of the body 1 (FIGS. 3 and 4).
  • said cavity 3 makes a first and a second sub-plane, 30 and 31 respectively, the second 31 of which is arranged at a lower level than the first 30 and defines a plurality of projecting ribs 6.
  • said second sub-plane 31 is crossed by a regular lattice of relatively narrow and generally shallow grooves 4, which cross over one another.
  • said grooves 4 are orientated according to the directrix defined by the diagonals of the shape in plan of the body 1 (see FIGS. 1 and 2) .
  • the arrangement and/or distribution of said crossed grooves 4 is such that they define an ordered plurality of identical rectangular coplanar flat areas 5 on the second sub-plane 31.
  • each individual flat area 5 there is a respective projecting rib 6 that are rectangular in plan, arranged concentrically to the respective surrounding flat rectangular area 5 (FIGS. 1 and 2).
  • the quoted ribs 6 are the same height, and their free end, which is flat and horizontal, is obviously coplanar to the first sub-plane 30.
  • the ribs 6 extend in a rectilinear direction, are parallel to each other, and are aligned in groups to form equally spaced rows, orientated according to the directrix defined by one of the diagonals of the shape in plan of the body 1.
  • the cavity 3 receives a plate 7 with the function of a bearing for equalizing the unbalancing caused by pressing.
  • said plate 7 has a generally constant thickness and is rested on the flat areas 5, the shape of which it matches in plan (FIGS. 2-4).
  • said bearing consists of a perforated plate 7 the thickness of which is practically half the height of the ribs 6.
  • Said perforated plate 7 is elastically flexible, and consists of generally rigid resin, or else harmonic steel.
  • the ports or openings of the quoted perforated plate 7 are sized so as to slot practically to exactly fit onto the respective ribs 6.
  • an elastically deformable membrane 8 of elastomeric material is foreseen that seals the cavity 3 shut.
  • the membrane 8 is firmly fixed, for example vulcanised, to the first sub-plane 30 of the cavity 3 and to the opposite face of the plate 7; in other words, it is firmly fixed to the marginal strip of the cavity 3, to the opposite face of the plate 7, and to the top of the ribs 6 that go beyond the plate 7.
  • the active outer face of the membrane 8 has impressions for forming the feet of the tile, in the present case provided by a lattice of identical rectilinear crossing grooves 9 that run parallel to the edges or sides of the body 1 (FIG. 2).
  • each groove 9 is oblique to the ribs 6 behind, which it crosses only in some portions, so that the defect of "transparency" is limited to just said portions.
  • the punch is substantially as shown on the right in FIGS. 3 and 4, where it can be seen that the membrane 8 and the plate 7 are flat and undeformed, with the second 7 resting on the bottom of the flat rectangular areas 5, where it closes the mouth of the grooves 4.
  • an incompressible fluid typically hydraulic oil, indicated with 10 in FIGS. 3 and 4, which is placed at a pressure suiting the processing being carried out, is introduced into the cavity 3.
  • This pressure can, for example, be between 2 and 8 bar.
  • the pressurised oil 10 is introduced, in a per sé known way, through two horizontal blind holes 22 and 33 (see FIG. 1) that are equipped with respective sealing plugs 122 and 133, and that are connected to two grooves 4 through corresponding vertical holes 222 and 233, whereas the oil 10 is discharged through a vertical hole 244 that derives from a groove 4, and that communicates with a horizontal blind hole 44 equipped with a suitable sealing plug 144.
  • FIGS. 3 and 4 An example of said eversion is shown in the left part of FIGS. 3 and 4, where it can be seen that in practice it does not involve the areas of the membrane 9 that are vertically aligned with the ribs 6 behind.
  • Said grooves 4 make a labyrinth channel the function of which is to allow the oil to run from one area of the cavity 3 to the other.
  • the feet of the tile can have a not perfectly flat extension, the defects of which are limited by the presence of the plate 7 under the membrane 8.
  • the shape, size and distribution of the ribs 6 and of the surface grooves 9 of the membrane 8 can be selected by discretion, provided that, as also stated previously, there are mutually overlapping areas between the two that are generally regularly distributed.
  • figures 5 to 10 show an alternative embodiment of the invention, in which the shape and the distribution of the ribs and of the grooves 9 allow feet to be made that effectively define a set of points of support that are coplanar, stable and very uniformly distributed.
  • the punch in accordance with said second embodiment comprises a metallic body 1, generally flat and square in plan, on the active face 2 of which a cavity 3 with differentiated depth is formed having a first sub-plane 30 and a second bottom sub-plane 31 that defines a plurality of projecting ribs 60.
  • Said second sub-plane 31 of the cavity 3 is furrowed by an ordered lattice of mutually perpendicular grooves 4, which are in communication with two horizontal holes 22 and 33 for feeding the hydraulic oil, and with a discharge hole 44, so as to make a labyrinth channel that allows the oil to run from one area of the cavity 3 to another, as described previously.
  • the grooves 4 are orientated according to the directrices defined by the diagonals of the square shape of the metallic body 1; however, this does not rule out the possibility of them being orientated in a different way.
  • the lattice of grooves 4 defines a plurality of coplanar flat areas 5 on the second sub-plane 31, which are identical to each other and are square-shaped in plan; this, with the exception of the flat areas 5 that are located adjacent to the edges of the cavity 3, which are different shapes in order to help the development of said edges.
  • each individual flat area 5 there is a respective rib 60.
  • each rib 60 comprises two perpendicular elongated parts, the cross section of which is substantially smaller than the size of the relative flat area 5, so as to occupy a limited portion thereof.
  • said elongated parts are joined together to form a continuous rib 60 that is substantially L-shaped in plan.
  • the ribs 60 are orientated the same way, and are arranged so that the relative elongated parts are aligned according to a plurality of ordered rows that cross one another forming a lattice.
  • said rows are equally spaced apart, so that the mesh of said lattice is identical and generally square-shaped in plan.
  • each rib 60 extends parallel and adjacent to two consecutive sides of the relative flat area 5, so that the rows defined by them run alongside the grooves 4, a short distance from them.
  • a perforated plate 7 the characteristics and functions of which are the same as those already described for the first embodiment of the invention, is rested on the bottom of the flat areas 5.
  • said perforated plate 7 matches the shape in plan of the flat areas 5, and its openings are sized so as to slot substantially fitting exactly onto the respective ribs 60. Therefore, in this case, said openings are obviously substantially L-shaped in plan.
  • the perforated plate 8 has a thickness roughly equal to half the height of the ribs 60, and consists for example of rigid plastic resin or harmonic steel.
  • the punch is completed by an elastically deformable membrane 8, of elastomeric material, which is firmly fixed to the first sub-plane 30 of the cavity 3 (thus also to the top of the ribs 60), and to the projecting face of the perforated plate 7.
  • the active outer face of the membrane 8 has impressions for forming the feet of the tile, which are provided by a lattice of identical rectilinear grooves 9 that cross over one another.
  • said rectilinear grooves 9 run along the directrices identified by the diagonals of the shape in plan of the metallic body 1.
  • each groove 9 of the membrane 8 is parallel to and overlaps a row of underlying parts belonging to the ribs 60.
  • the lattice of grooves 9 fits together in plan with the lattice defined by the ribs 60 (see fig.5) .
  • the ribs 60 are just arranged at the grooves 9, they only act in the parts of the tile touched by the support feet, ensuring effective isostatic behaviour of the punch in all of the other parts.
  • ribs 60 are arranged along directions perpendicular to each other, they allow coplanar support areas to be made that extend according to both of the aforementioned directions, and therefore that ensure a stable support of the tile, whatever orientation it takes up on the roller system of the firing kiln.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Finishing Walls (AREA)
EP06075328A 2005-03-25 2006-02-10 Poinçon de presse pour formage dûne surface de pièces en céramique Withdrawn EP1704975A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITRE20050033 ITRE20050033A1 (it) 2005-03-25 2005-03-25 Punzone ceramico tipo marca

Publications (2)

Publication Number Publication Date
EP1704975A2 true EP1704975A2 (fr) 2006-09-27
EP1704975A3 EP1704975A3 (fr) 2007-07-04

Family

ID=36608632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06075328A Withdrawn EP1704975A3 (fr) 2005-03-25 2006-02-10 Poinçon de presse pour formage dûne surface de pièces en céramique

Country Status (2)

Country Link
EP (1) EP1704975A3 (fr)
IT (1) ITRE20050033A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0620089A2 (fr) * 1993-03-17 1994-10-19 Maris Algeri Méthode et matrice de pressage isostatique, en particulier pour la fabrication de carreaux en céramique
EP0659527A1 (fr) * 1993-12-21 1995-06-28 MASS S.p.A. Méthode et machine pour fabriquer des carreaux de densité et d'épaisseur constantes, et carreaux ainsi obtenus
EP0701889A2 (fr) * 1994-09-13 1996-03-20 Maris Algeri Matrice pour le pressage isostatique de carreaux en céramique et procédé de fabrication des carreaux
EP0759346A1 (fr) * 1995-08-18 1997-02-26 Carlo Antonio Camorani Matrice pour le pressage isostatique et procédé pour sa fabrication
WO2003086722A1 (fr) * 2002-04-17 2003-10-23 Molcer, S.A. Burin vulcanise

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0620089A2 (fr) * 1993-03-17 1994-10-19 Maris Algeri Méthode et matrice de pressage isostatique, en particulier pour la fabrication de carreaux en céramique
EP0659527A1 (fr) * 1993-12-21 1995-06-28 MASS S.p.A. Méthode et machine pour fabriquer des carreaux de densité et d'épaisseur constantes, et carreaux ainsi obtenus
EP0701889A2 (fr) * 1994-09-13 1996-03-20 Maris Algeri Matrice pour le pressage isostatique de carreaux en céramique et procédé de fabrication des carreaux
EP0759346A1 (fr) * 1995-08-18 1997-02-26 Carlo Antonio Camorani Matrice pour le pressage isostatique et procédé pour sa fabrication
WO2003086722A1 (fr) * 2002-04-17 2003-10-23 Molcer, S.A. Burin vulcanise

Also Published As

Publication number Publication date
ITRE20050033A1 (it) 2006-09-26
EP1704975A3 (fr) 2007-07-04

Similar Documents

Publication Publication Date Title
EP1882571B1 (fr) Moule isostatique pour formation de carreau
DK1117511T3 (da) Fremgangsmåde til fremstilling af en murværksblok med ru flade
RU2008115344A (ru) Заготовка для облицовки двери с калевкой и способ ее изготовления
EP1704975A2 (fr) Poinçon de presse pour formage dûne surface de pièces en céramique
EP0211449B1 (fr) Presse spécialement adaptée au moulage des tuiles
EP1106336B1 (fr) Dispositif pour chasser l'air emprisonné dans un matériau en poudre fine lors d'un cycle de pressage pour la fabrication d'objets en céramique
ITFI970178A1 (it) Apparecchiatura per produrre mattonelle sottili di impasto cementizio
EP1250990B1 (fr) Méthode pour le façonnage d'articles céramiques
GB2456250A (en) Mold for making shoes
EP0400704B1 (fr) Méthode pour la fabrication de carreaux en céramique compactés de façon uniforme, et moyens pour sa mise en oeuvre
DK180353B1 (en) Brick punching system
CN207273522U (zh) 一种线条通体陶瓷的生产设备
EP1120213A3 (fr) Ensemble de filtrage pour un moule de pressage
ITBO960466A1 (it) Stampo per la fabbricazione di piastrelle ceramiche
KR100450042B1 (ko) 타일 성형장치
EP0569069B1 (fr) Moule pour la fabrication de carreaux en céramique et moyens d'alimentation de ce moule
ITRE20070108A1 (it) '' apparato per la alimentazione continua di polveri nella fabbricazione di piastrelle ceramiche ''
ITFI20010104A1 (it) Struttura filtrante per il tampone di presse per la produzione di mattonelle monostrasto di cemento con superfici filtranti ed attrezzatura
KR101453398B1 (ko) 양각 콘크리트블럭 성형기용 형틀
KR20110008048U (ko) 타일 성형장치
CN212171406U (zh) 一种降低废料高精度制药压片机
ITRE20090112A1 (it) Punzone isostatico per piastrelle
ITUA20164297A1 (it) Stampo per la formatura di piastrelle ceramiche e procedimento di formatura di piastrelle ceramiche mediante tale stampo
IT201800005675A1 (it) Tampone per la pressatura di polveri ceramiche
ES2181514A1 (es) Dispositivo para regular la compactacion en punzones para prensas.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

17P Request for examination filed

Effective date: 20071221

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110901