EP2958720B1 - Apparatus for the production of single-layer tiles - Google Patents

Apparatus for the production of single-layer tiles Download PDF

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Publication number
EP2958720B1
EP2958720B1 EP14715987.5A EP14715987A EP2958720B1 EP 2958720 B1 EP2958720 B1 EP 2958720B1 EP 14715987 A EP14715987 A EP 14715987A EP 2958720 B1 EP2958720 B1 EP 2958720B1
Authority
EP
European Patent Office
Prior art keywords
plate
frame
filter
collector
channels
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.)
Not-in-force
Application number
EP14715987.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2958720A1 (en
Inventor
Umberto Cipriani
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.)
Longinotti Group Srl
Original Assignee
Longinotti Group Srl
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Filing date
Publication date
Application filed by Longinotti Group Srl filed Critical Longinotti Group Srl
Publication of EP2958720A1 publication Critical patent/EP2958720A1/en
Application granted granted Critical
Publication of EP2958720B1 publication Critical patent/EP2958720B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/46—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for humidifying or dehumidifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/26—Permeable casings or strainers
    • B30B9/262—Permeable casings or strainers means disposed in the casing facilitating the squeezing-out of liquid

Definitions

  • the present invention relates to a unit for carrying out the steps of pressing and suction of water in processes for production of tiles, in particular single-layer tiles.
  • DE 10 2007 030 324 A1 discloses an apparatus for presses designed for the production of single-layer tiles starting from a water-based mix contained in a mould defining a pressing area in accordance with the preamble of claim 1.
  • An aspect of known systems that is open to improvement is linked to the relative difficulty in keeping the filtering and suction system clean and to the relatively frequent need to replace the filters used for removal of the excess liquid phase from the mix.
  • a first advantage lies in the fact that the filters can be replaced without removing the plate from the pad, i.e., maintaining the plate and the pad fixed together, it being possible for them to be released only when it is necessary remove the plate to replace the filter and also to carry out cleaning of the inside of the various collectors, it being thus possible to reduce the frequency at which the latter operation is carried out.
  • a further advantage consists in the reduction of the weight of the plate, which facilitates handling of the plate during introduction and extraction from the mould.
  • the unit 1 basically comprises:
  • the frame 5 is a single monolithic piece obtained by moulding, for example a frame made of elastomer 13 reinforced by a rigid insert 15 obtained from welded L-shaped sectional elements to improve its capacity for withholding the filtering fabric of the filter 6.
  • the shape of the frame 5 is such that the bottom perimetral surface 12 of the monolithic plate 9, made of metal material, does not come into contact with the liquid mix during the pressing operations.
  • the frame 5 has been conceived mainly so that it is possible to mount it on and remove it from the plate 9 without this having to be released from the pressing pad 11.
  • a method for mounting the frame is described in what follows ( Figure 19 ).
  • a clean frame is introduced into, and rested on the bottom of, the compartment of the mould 3, and the filter 6 is inserted within the centring portion 45 of the frame.
  • the pressing assembly comprising the pad 11 fixed to the plate 9 and to the collectors 7, 8 is made to drop, until it enters the compartment of the mould 3, slowly and with a low value of pressing pressure.
  • the frame 5 is shaped with a projecting profile 14 so that it can penetrate with slight interference into a corresponding lateral slot 43 of the bottom surface of the plate 9 and in such a way that, during this movement, the filter 6, which had been inserted within the frame, will assume on the outside the same profile as that of the frame and will remain thus blocked between the frame 5 and the plate 9.
  • this operation is carried out automatically by the press following upon a manual command.
  • the projecting profile of the frame has perimetral bevels 16 that have the purpose of facilitating its insertion into the slot 43 of the plate and to facilitating pneumatic expulsion therefrom, as will be described more fully hereinafter.
  • the pressure spreads over the entire surface defined by the projection 14 of the frame and is distributed perimetrally both without and within the thickness owing to the surface that has remained free on account of the two bevels 16 that had the function of facilitating insertion of the frame into the plate.
  • the frame tends to detach from the plate being, however, withheld by the fact that the entire pressing assembly keeps it in contact with the bottom of the mould.
  • a first mesh collector 7 which is obtained from criss-cross weaving of stainless-steel wires and in the assembled configuration is contained precisely within an internal contrast profile 19 of the plate 9.
  • a second collector 8 having the shape of a perforated plate, which is comprised between the first bottom collector and the plate 9 and is also contained precisely within the internal contrast profile 19 of the plate 9, said contrast profile 19 being appropriately sized so as to enable centring of the first and second collectors and for accommodating both of them for their entire thicknesses.
  • Fixing of the collectors 7 and 8 to the plate 9 is obtained by means of screws 46A, which are readily accessible and are inserted in corresponding holes 20, 21, 22 in such a way that the collectors remain adherent to the plate 9 when it is necessary to replace just the filter, or else in such a way that it is possible to remove the collectors when occasionally it is desired to carry out a more accurate cleaning thereof.
  • the second collector 8 is obtained from a sheet of stainless steel having a thickness of 3 mm that is completely perforated, with holes having a diameter of 4.5 mm and a distance between centres of 15 mm.
  • this collector in this collector at least 552 active holes 33 are hence present with a total section of passage of 8779 mm 2 and are distributed at 45° with respect to the orthogonal axes of the plate 9.
  • the large number of holes 33 present in this collector and their uniform distribution have the function, during the pressing step, of receiving a greater amount of water prior to suction thereof and then of presenting an extensive and distributed passage of air that is to flow through the various elements, namely, the filter, the first and second collectors, and the plate, and then be rapidly expelled through the suction manifolds 23 provided in the pad 11.
  • the bottom surface 24 of the monolithic plate 9 is machined to provide the slot 43 and the profile 19 so that it can house the frame, the filter, and the two collectors and form a substantially plane pressing surface 25 without any roughness or discontinuity that during pressing would come into contact with the liquid mix 2.
  • a series of channels 32 are moreover provided that cross one another once again diagonally like the holes 33 present on the second collector 8.
  • the pitch of these channels distributed over the entire surface is advantageously equal to the distance between centres of the holes 33 of the second collector in such a way that the air/water will flow directly from the holes to the channels.
  • the section of passage of these channels 32 has, in the top part, a rounded shape ( Figures 5-6 ) and a sufficient depth so as to guarantee a good rate of flow and not to have regions with sharp corners where material would tend to deposit.
  • the connection for the passage of air/water between the top and bottom sides of the plate 9 is obtained in areas corresponding to the top housings 27.
  • generally L-shaped through openings 34 are provided that connect the bottom with the top of the plate and directly converging in which are the channels 32 of the bottom face of the plate (for example four channels 32) centred on the diagonals. All the other channels 32 are, instead, delimited in their extension by four perimetral channels 35.
  • the perimetral channels 35 are deeper than the diagonal ones 32 and converge in the L-shaped openings 34.
  • the channels 35 give out on the outside of the plate via the holes 36 parallel to the surface of the plate and distributed over the four vertical sides of the plate ( Figures 5 and 6 ).
  • the holes 36 have the function of sucking in the water and the slurry that gets stuck, during pressing, in the perimetral clearance that may arise between the plate and the compartment of the mould.
  • the mix 2 is dosed and poured into the mould 3 in doses having a cylindrical shape that drop from a certain height.
  • the mould in vibration, according to a technique in itself well known.
  • the vibration is obtained in the best possible way, at the vertices of the diagonals of the compartment of the mould 3 there will always be obtained a greater concentration of the lightest component in the mix, that is water, which reaches more easily the areas that are further away from the point where the mix is dropped.
  • the plate 9 according to the invention has been conceived for having a greater suction capacity at the vertices of the diagonals of the mould and perimetrally.
  • the openings 34 have sides parallel to the corners of the mould and are set as close as possible to the vertices of the diagonals of the mould.
  • the holes 28 of the pressing pad from where the suction pressure arrives have their projection that falls on these openings 34.
  • the two channels 37 set on the right and on the left with respect to the diagonals have been prolonged beyond the opening 34 towards the corners of the mould until they find outlet in two holes 38 at the vertex of the second bottom collector 8 ( Figure 12 ).
  • the amount of water that we have to draw off from the tile is 0.57 to 0.95 1.
  • Within the various collectors and channels present on the plate we have a space for housing approximately 1.07 1. It is thus possible to house in these elements, which are located in the point closest to the extraction point, all the water extracted even before the suction pressure can extract it and carry it out of the plate.
  • a further embodiment of a suction plate 90 is described associated to a frame 50 made of a single piece according to the invention, where the same reference numbers as those used for the parts of the plate 9 already described are used for designating the corresponding parts of the plate 90 that perform the same function.
  • the frame 50 is constituted by a monolithic internal rigid ring 51, made, for example, of metal, enveloped by an elastomeric coating 53 of small thickness, which is provided at the top with a perimetral projection 52 that emerges from a top contrast surface defined by the internal and external surfaces 58 and 59 of the frame 50, which have the function of withstanding the vertical forces that are generated during the pressing operations.
  • the internal edge of the frame 50 is defined by a stretch 60 substantially parallel to the projection 52, which is preferably provided with a wedge-shaped bottom lip 54.
  • Figures 22 and 23 show the operating configuration of the plate 90, with the projection 52 of the frame 50 inserted in the corresponding bottom perimetral cavity 56 of the plate 90, and the edge 55 of the filter 6 withheld between the internal stretch 60 of the frame and an opposed surface 61 of the cavity 56 of the plate 90.
  • perimetral holes 33a are moreover present, distributed along the sides of the collector 8 for communicating directly with the channels 35 and improving suction from the perimetral pressing area.
  • the height H of the projection 52 is slightly smaller than the depth of the cavity 56 in such a way that between the surface 63 of the projection 52 and the internal bottom surface 64 of the cavity 56 there remains a space 65 that defines a chamber communicating with the pneumatic duct 18 of the plate 90 ( Figure 26 ), said duct being provided for pneumatic expulsion of the frame and having already been described previously.
  • the compressed air sent during expulsion into the ducts 18 fills the space 65 and determines a uniform thrust on the elastomeric projection 52, which behaves as a piston that is able to slide in the cavity 56.
  • the internal stretch 60 of the frame 50 and the opposed surface 61 of the plate 90 are orthogonal with respect to the pressing surface, i.e., parallel to the direction of advance of the plate 90, and are set at a distance by an extent slightly smaller than the thickness of the edge 55 of the filter 6 in order to set the filter 6 in tension at the four sides at the moment of insertion of the projection 52 into the perimetral cavity 56.
  • the range of the stroke i.e., of the fluid-tight sliding between the projection 52 and the cavity 56 during expulsion, is greater than the height of the flap or edge 55 of the filter withheld between the surfaces 60 and 61 in such a way that the thrust of pneumatic expulsion is effective at least until complete extraction of the filter 6.
  • Figure 24 shows the plate 90 extracted from the mould 3, on the bottom of which the frame 50 has been rested with a filter 6 resting on the contrast surfaces 58 of the frame.
  • Figure 25 shows an intermediate step of exit of the projection 52 from the cavity 56, where the edges 55 of the filter 6 are already free from the surfaces 60, 61 of the frame and of the plate, respectively, and the projection 52 is still inserted in a fluid-tight way in the cavity 56.
  • Figure 26 shows the pressing operating configuration, in which the plate rests on the surfaces 58, 59 of the frame, the projection 52 is completely inserted into the cavity 56 communicating with the expulsion ducts 18, and the filter 6 defines with the bottom surface 66 of the frame a pressing surface that is substantially smooth and without any irregularities, also thanks to the presence of the perimetral lip 54.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Filtering Materials (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)
  • Furnace Charging Or Discharging (AREA)
EP14715987.5A 2013-02-21 2014-02-21 Apparatus for the production of single-layer tiles Not-in-force EP2958720B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000034A ITFI20130034A1 (it) 2013-02-21 2013-02-21 Apparato per la produzione di mattonelle monostrato
PCT/IB2014/000187 WO2014128550A1 (en) 2013-02-21 2014-02-21 Apparatus for the production of single-layer tiles

Publications (2)

Publication Number Publication Date
EP2958720A1 EP2958720A1 (en) 2015-12-30
EP2958720B1 true EP2958720B1 (en) 2018-09-19

Family

ID=48096003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14715987.5A Not-in-force EP2958720B1 (en) 2013-02-21 2014-02-21 Apparatus for the production of single-layer tiles

Country Status (4)

Country Link
EP (1) EP2958720B1 (it)
ES (1) ES2700236T3 (it)
IT (1) ITFI20130034A1 (it)
WO (1) WO2014128550A1 (it)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1262296A2 (en) * 2001-06-01 2002-12-04 Longinotti Meccanica S.r.l. Filtration structure for the pad of a press for producing single-layer cement tiles with filtration surfaces and apparatus for replacing such filtration surfaces

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1294828B1 (it) * 1997-07-24 1999-04-15 Longinotti Meccanica S R L Apparecchiatura per produrre mattonelle sottili di impasto cementizio
ITFI20010103A1 (it) 2001-06-01 2002-12-01 Longinotti Meccanica S R L Metodo ed attrezzatura per la produzione di mattonelle monostrato
ITFI20050043U1 (it) 2005-05-30 2006-11-30 Longinotti Meccanica S R L Placca per presse per la produzione di mattonelle e gruppo di pressatura provvista di tale placca
ITMI20061262A1 (it) * 2006-06-29 2007-12-30 O C E M Officina Costruzioni Elettro-Meccaniche Dispositivo per la produzione di mattonelle
ITFI20110107A1 (it) * 2011-05-24 2012-11-25 Longinotti Group S R L Apparato per la produzione di mattonelle.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1262296A2 (en) * 2001-06-01 2002-12-04 Longinotti Meccanica S.r.l. Filtration structure for the pad of a press for producing single-layer cement tiles with filtration surfaces and apparatus for replacing such filtration surfaces

Also Published As

Publication number Publication date
WO2014128550A1 (en) 2014-08-28
EP2958720A1 (en) 2015-12-30
ITFI20130034A1 (it) 2014-08-22
ES2700236T3 (es) 2019-02-14

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