EP1366874B1 - A device for forming a soft load of ceramic powders - Google Patents

A device for forming a soft load of ceramic powders Download PDF

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Publication number
EP1366874B1
EP1366874B1 EP03425301A EP03425301A EP1366874B1 EP 1366874 B1 EP1366874 B1 EP 1366874B1 EP 03425301 A EP03425301 A EP 03425301A EP 03425301 A EP03425301 A EP 03425301A EP 1366874 B1 EP1366874 B1 EP 1366874B1
Authority
EP
European Patent Office
Prior art keywords
mobile
ceramic powders
barrier
conveyor plane
forming die
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.)
Expired - Lifetime
Application number
EP03425301A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1366874A3 (en
EP1366874A2 (en
Inventor
Giuliano Spadoni
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.)
Cerservice Srl
Original Assignee
Cerservice 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 Cerservice Srl filed Critical Cerservice Srl
Publication of EP1366874A2 publication Critical patent/EP1366874A2/en
Publication of EP1366874A3 publication Critical patent/EP1366874A3/en
Application granted granted Critical
Publication of EP1366874B1 publication Critical patent/EP1366874B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B28B13/0205—Feeding the unshaped material to moulds or apparatus for producing shaped articles supplied to the moulding device in form of a coherent mass of material, e.g. a lump or an already partially preshaped tablet, pastil or the like
    • 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
    • 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
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B28B17/0063—Control arrangements

Definitions

  • a soft load i.e. a layer of loose powders for forming a tile after pressing, is formed by pouring a predetermined quantity of the powders directly into a pressing die of a press.
  • the die is inferiorly delimited by a bottom die and laterally by a closed-periphery matrix.
  • the soft load is poured onto the bottom die in a quantity which exceeds the capacity of the die. The excess is removed by a scraper operating above the die.
  • Document US-A-5,862,612 discloses a system and a method wherein water content, which is bound by capillarity in fiber cells of carboniferous materials, is reduced by a thermomechanical dewatering process.
  • the carboniferous materials are conveyed by a dispersion box into a pressure chamber including upper and lower plates.
  • the pressure chamber is surrounded by two lateral walls and two mobile vertical front and rear barriers which, in a lower position, do not come into contact with the bottom wall of the chamber.
  • Steam is applied to the materials introduced into the pressure chamber from both the upper and lower plates to heat the materials up to about 125 DEG C. and to release the water which is bound by capillarity in the fiber cells.
  • the pressure within the chamber is maintained at no greater than the steam pressure.
  • the pressure chamber is sealed gastight and the carboniferous materials in the pressure chamber are pressed using the upper and lower plates.
  • the main aim of the present invention is to provide a device for forming a soft load of ceramic powders, which device enables a precise definition of the thickness of a soft load.
  • a further aim of the present invention is to provide a device for forming a soft load in which the surface characteristics of the load are left intact.
  • the device 1 comprises: a mobile conveyor plane 2 moving in an advancement direction A; the plane 2 can be a conveyor belt.
  • Means 3 for depositing a layer of ceramic powders 4 on the conveyor plane 2 are associated thereto.
  • the means 3 for depositing can be a hopper with a downwards-facing opening to enable the powders contained therein to fall downwards.
  • the invention further comprises a mobile upper surface 5, mobile on command in a vertical direction, arranged above the conveyor plane 2 and downstream (with reference to advancement direction A) of means for depositing a layer of ceramic powders 4.
  • the surface 5 is mobile in a vertical direction between an inactive upper position and a lower active position on an underlying layer of ceramic powders 4.
  • the pressor 6 can for example be represented by a pneumatic or hydraulic double-acting cylinder, a retracting run of which is superiorly limited by the gauging elements 7.
  • the position of the gauging instruments 7 has a precise function which will be better described herein below.
  • a barrier 8 is operatively associated to the mobile upper surface 5, which barrier 8 develops peripherally about the mobile upper surface 5 to delimit a forming die 9 for a soft load, which die 9 is inferiorly delimited and closed by the conveyor plane 2.
  • the barrier 8 comprises a vertically-mobile wall 10, for opening and closing the side located upstream of the barrier 8 with respect to the advancement direction A.
  • the barrier 8 is a rectangular wall, closed on one side by the wall 10.
  • the barrier 8 in its entirety creates a perimeter wall around the mobile upper surface 5.
  • the forming die 9, comprised between the mobile upper surface 5, the mobile conveyor plane 2 and the barrier 8, constitutes a closed chamber.
  • the operation of the device is as follows.
  • the ceramic powders inside the means 3 for depositing are dropped onto the conveyor plane 2.
  • the ceramic powders thus deposited form the layer 4, which is less thick than the distance between the mobile conveyor plane 2 and the upper position of the mobile upper surface 5, which is drawn in the direction of the barrier 8.
  • the wall 10 is raised and the mobile upper surface 5 is in the upper position ( figure 2 ), enabling the ceramic powders to enter the forming die 9.
  • the layer of ceramic powders 4 meets a barrier to advancement thereof, namely the side of the barrier 8 opposite to the wall 10. In this situation the ceramic powders progressively fill the forming die 9.
  • the sensor 11 can for example measure the thickness of the layer of ceramic powders 4 in an immediately-upstream section of the wall 10. When the thickness reaches a predetermined amount, i.e.
  • the upper position of the mobile upper surface 5 can be defined by means of the gauging elements 7, in order to obtain a soft load of a thickness which is correctly correlated to the desired thickness of the finished tile after the pressing cycle.
  • the mobile conveyor plane 2 is commanded to stop and the depositing of the ceramic powders stopped.
  • the mobile upper surface 5 can be lowered towards the lower position and the soft load can be formed (see figure 3 ).
  • the lower position of the surface 5 can advantageously be set on the basis of the pressure load that which is to be exerted on the soft load.
  • an advantageous solution might be a load which gives the soft load a level of consistency which permits other manipulations to be made thereon.
  • the system constituted by the barrier 8 and the mobile upper surface 5 is transferred, by special means for such, to the die 14 of a press 15, which position is indicated by D in figure 4 ; at this point the final tile is formed.
  • the formed soft load is deposited in the die 14 and is subject to a final pressing, while the system consisting of the barrier 8 and the mobile upper surface 5 is repositioned on the mobile conveyor plane 2, in position C, to start the forming process of another soft load.
  • the wall 10 can be used as a pushing device, moving the tile in a parallel direction to the mobile conveyor plane 2.
  • the invention can also be usefully applied in cases where the real pressing of the tile is performed directly on the mobile conveyor plane 2.
  • the mobile upper surface 5 is a bottom surface 12 of a die 13 of a pressing device.
  • the die 9 is inferiorly delimited by the mobile conveyor plane 2, superiorly by the lower surface 12 and laterally by the barrier 8.
  • the invention proposes considerable advantages.
  • a further important advantage is managing to maintain any multi-coloured patterns resulting from the use of powders with differently-coloured tones in the conveyor-plane depositing stage.
  • the mobile upper surface of the layer of ceramic powders 4 simply contacts with the mobile upper surface 5, with no further movements which might in some way change its appearance.

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)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Compositions Of Oxide Ceramics (AREA)
EP03425301A 2002-05-31 2003-05-12 A device for forming a soft load of ceramic powders Expired - Lifetime EP1366874B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMO20020150 2002-05-31
IT2002MO000150A ITMO20020150A1 (it) 2002-05-31 2002-05-31 Dispositivo per la formatura di una carica soffice di polveri ceramiche

Publications (3)

Publication Number Publication Date
EP1366874A2 EP1366874A2 (en) 2003-12-03
EP1366874A3 EP1366874A3 (en) 2005-04-27
EP1366874B1 true EP1366874B1 (en) 2008-12-17

Family

ID=11451063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03425301A Expired - Lifetime EP1366874B1 (en) 2002-05-31 2003-05-12 A device for forming a soft load of ceramic powders

Country Status (5)

Country Link
EP (1) EP1366874B1 (it)
AT (1) ATE417716T1 (it)
DE (1) DE60325296D1 (it)
ES (1) ES2316712T3 (it)
IT (1) ITMO20020150A1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1739932B (zh) * 2004-04-28 2010-06-16 泰国陶瓷制品有限公司 生成贯穿产品整个厚度的图案纹理的装置和工艺

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602005013647D1 (de) * 2005-04-25 2009-05-14 Thai Ceramic Co Ltd Vorrichtung zum Herstellen von kontinuierlichen Adern mit gewünschten Mustern, welche sich durch die gesamte Dicke des Gegenstands erstrecken und Verfahren zu deren Herstellung
CN110143059B (zh) * 2019-05-07 2024-07-16 佛山市赛普飞特科技有限公司 一种数码打印装置及其数码打印方法
EP3909734A1 (en) * 2020-05-12 2021-11-17 Siti - B&T Group S.p.A. Process and equipment for the manufacture of slabs of ceramic material

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1269274B (it) * 1994-11-22 1997-03-26 Carlo Antonio Camorani Metodo per la formatura di piastrelle ceramiche ed impianto relativo
DE19537286B4 (de) 1995-09-22 2006-03-23 Dieffenbacher Gmbh + Co. Kg Presse zur Reduzierung des Wassergehaltes von Schlämmen
EP0995562A1 (en) * 1998-10-15 2000-04-26 Ronflette S.A. A device for forming ceramic products such as tiles and the like, by powder pressing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1739932B (zh) * 2004-04-28 2010-06-16 泰国陶瓷制品有限公司 生成贯穿产品整个厚度的图案纹理的装置和工艺

Also Published As

Publication number Publication date
ITMO20020150A0 (it) 2002-05-31
ES2316712T3 (es) 2009-04-16
ATE417716T1 (de) 2009-01-15
DE60325296D1 (de) 2009-01-29
EP1366874A3 (en) 2005-04-27
ITMO20020150A1 (it) 2003-12-01
EP1366874A2 (en) 2003-12-03

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