EP1716998A2 - Verdichtungsüberwachungssystem für eine isostatische Presse - Google Patents

Verdichtungsüberwachungssystem für eine isostatische Presse Download PDF

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Publication number
EP1716998A2
EP1716998A2 EP06075716A EP06075716A EP1716998A2 EP 1716998 A2 EP1716998 A2 EP 1716998A2 EP 06075716 A EP06075716 A EP 06075716A EP 06075716 A EP06075716 A EP 06075716A EP 1716998 A2 EP1716998 A2 EP 1716998A2
Authority
EP
European Patent Office
Prior art keywords
oil
air space
mould
valve
metering device
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
EP06075716A
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English (en)
French (fr)
Other versions
EP1716998A3 (de
EP1716998B1 (de
Inventor
Marco c/o SACMI Coop. MECCANICI IMOLA SC Salieri
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.)
Sacmi Imola SC
Original Assignee
Sacmi Imola SC
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 Sacmi Imola SC filed Critical Sacmi Imola SC
Priority to PL06075716T priority Critical patent/PL1716998T3/pl
Publication of EP1716998A2 publication Critical patent/EP1716998A2/de
Publication of EP1716998A3 publication Critical patent/EP1716998A3/de
Application granted granted Critical
Publication of EP1716998B1 publication Critical patent/EP1716998B1/de
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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
    • 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
    • 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
    • B28B17/0081—Process control
    • 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 present invention refers to the isostatic moulds whose use is well-known for the pressing of forming powders of ceramic tiles.
  • one of the punches of the normal ceramic mould comprises a metallic base in which an air space is defined. This air space is closed by a deformable membrane intended to come into contact with the powder and filled by means of a liquid, generally oil.
  • the air space may comprise a grid which defines a series of intercommunicating cells, to whose upper edge the membrane is fixed.
  • the filling of the air space by means of oil occurs by adjusting the pressure inside the punch, causing an elastic deformation of the membrane which remains in contact with the top of the grid, to which it is fixed.
  • Variations of the isostatic mould are known in which the membrane is supported at the metallic base and bound to the same only at distributed zones, so to define adjacent and communicating areas in which the membrane is simply supported at the metallic base.
  • the known isostatic moulds often foresee that the isostatic punch equipped with membrane is the lower punch of the mould, which defines the base of the mould cavity wherein the powder to be pressed is received.
  • the oil modifies its own chemical-physical characteristics following aging, and may become aggressive over time with regards to the membrane: taking into account the very high stress to which it is subjected, which may reach hundreds of Kg per square cm, this phenomenon considerably shortens the life of the mould.
  • the elastic action of the punch may cause defects or breaking of the tile itself.
  • the swellings of the membrane project beyond the upper face of the mould matrix, and are rubbed by the exiting tile, with premature localised wear and deterioration.
  • the object of the present invention is to eliminate the abovementioned drawbacks in the scope of a simple and economical solution.
  • the pressing system according to the finding foresees the use of an isostatic mould of substantially known type, associated with means of feeding and control of the oil contained in the same.
  • Said means of feeding and control comprise a volumetric metering device adapted, at every pressing cycle, to insert a precise and desired volume of oil in the punch, means adapted to discharge all of the oil contained in the punch at every pressing cycle and finally means to send towards an oil tank contained inside the pad, with the modes defined here below.
  • the operator decides the metered quantity of oil which must be present in the pad.
  • the quantity of oil contained in the punch is equal to zero, or is in any case such to not deform the elastic membrane.
  • the desired volume of oil is inserted into the mould, so that it is in normal operating configuration at the time it receives the impact of the compaction, and distributes the compaction pressure in isostatic manner.
  • Fig. 1 schematically illustrates an isostatic punch according to the finding with related hydraulic diagram.
  • the punch 1 is inserted in a mould of which one sees only the matrix 2; the known anti-wear plates 11 are peripherally fixed to this matrix, flush to the upper edge.
  • the punch comprises a metallic body 10.
  • the upper surface of the body 10 has a network of grooves 12, and a corresponding network of conduits 13 whose vertical segments lead to the centre of the areas defined by the grooves.
  • the conduits 13 lead to a single collector 14 which leads laterally outside the body 10.
  • the areas defined by the grooves 12 are covered by an anti-stick substance before they are cast and the elastic membrane 3 vulcanised or polymerised in situ; the elastic membrane thus results adherent to the metallic body only at the grooves and along the periphery.
  • the powder 4 to be compressed is supported on the membrane 3.
  • oil When oil is inserted through the conduits 13, it is distributed in the areas between the grooves, swelling the overlying membrane which thus endows the punch with the isostatic property.
  • the volumetric metering device 5 is represented in the figure, schematised as a cylinder 51, wherein a sealed piston 52 slides, dividing the inside of the cylinder into two chambers 54 and 55.
  • the stem 53 is associated with a detection and measurement device 56 of the piston translations, which define the volume of oil fed by the metering device.
  • the chamber 54 of the cylinder is connected to an oil tank 6 by means of the pump 7 and the valve 81.
  • the chamber 55 of the metering device is connected to the collector 14 with the interposition of a valve 82, and to the tube which connects the pump 7 and the valve 81 with the interposition of the valve 83.
  • the collector 14 is directly connected to the tank 6 with the interposition of a two-way valve 84.
  • the operation of the device is as follows.
  • the system configuration illustrated in the figure corresponds to the raised position of the upper cross member of the press, not illustrated.
  • the operator decides beforehand the volume of the oil which he wishes to insert in the punch based on the pad's geometry, appropriately reading the device 56 which is a position transducer, and making sure that the tubing and the chambers 54 and 55 of the metering device are full of oil.
  • valves 81, 82, 83 and 84 together with the device 56 are connected to the mould's control system, for example a PLC, which regulates the following operations in relation with the cycle step of the press.
  • the mould's control system for example a PLC
  • the pump feeds oil under pressure into the chamber 54 of the metering device and the piston moves, transferring the oil contained in the chamber 55 of the metering device to the inside of the mould.
  • valve 81 slide is repositioned in the centre, the valve 82 slide repositioned to the left.
  • the punch is insulated from the metering device and acts like a normal isostatic punch in the subsequent pressing steps.
  • the control system waits for the punch to be completely discharged by means of the position transducer 56, then the valve 82 slide is repositioned to the left, the valve 81 slide is repositioned in the centre and the press cycle continues normally.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Press Drives And Press Lines (AREA)
  • Reciprocating Pumps (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
EP06075716A 2005-04-26 2006-03-28 Verdichtungsüberwachungsvorrichtung und -Verfahren für eine isostatische Presse Active EP1716998B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06075716T PL1716998T3 (pl) 2005-04-26 2006-03-28 Aparat i sposób do sterowania prasowaniem za pomocą form izostatycznych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000042A ITRE20050042A1 (it) 2005-04-26 2005-04-26 Sistema di controllo compattazione mediante stampi isostatici

Publications (3)

Publication Number Publication Date
EP1716998A2 true EP1716998A2 (de) 2006-11-02
EP1716998A3 EP1716998A3 (de) 2007-11-07
EP1716998B1 EP1716998B1 (de) 2011-09-07

Family

ID=36778070

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06075716A Active EP1716998B1 (de) 2005-04-26 2006-03-28 Verdichtungsüberwachungsvorrichtung und -Verfahren für eine isostatische Presse

Country Status (6)

Country Link
EP (1) EP1716998B1 (de)
CN (1) CN1853890A (de)
ES (1) ES2371769T3 (de)
IT (1) ITRE20050042A1 (de)
PL (1) PL1716998T3 (de)
RU (1) RU2441750C2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009101500A1 (en) * 2008-02-15 2009-08-20 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Pressing apparatus and method
CN108818883A (zh) * 2018-07-09 2018-11-16 广东天恒液压机械有限公司 陶瓷压机电液控制方法及系统
EP3401068A3 (de) * 2017-05-10 2019-01-16 Gape Due S.P.A. Form mit hoher kontrollierbarkeit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101045313B (zh) * 2007-03-16 2010-06-09 吴锐光 一种陶瓷压机用的节能方法及其装置
ES2745575A1 (es) * 2018-08-30 2020-03-02 Asitec Ceram S L Punzon isostatico

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1234978A (en) 1968-04-24 1971-06-09 Brueck Schloesser & Co G M B H Hydraulic presses for pressing artificial stone
US4718842A (en) 1984-09-11 1988-01-12 Philippe Labbe Automatic press for controlling the force on each movable plate
DE4320203A1 (de) 1993-06-18 1994-12-22 B & B Maschinenbau Gmbh Wandung für eine Preßform und eine eine derartige Wandung einbeziehende Preßeinrichtung und Preßform
EP0659572A2 (de) 1993-12-27 1995-06-28 Seiko Epson Corporation Drucker und Verfahren zur Steuerung desselben
JP2003260600A (ja) 2002-03-11 2003-09-16 Kitagawa Elaborate Mach Co Ltd プレス装置およびプレス装置の制御方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1262344B (it) * 1993-12-21 1996-06-19 Mass Spa Metodo e impianto per la formatura di piastrelle a compattazione e spessore uniformi, e piastrelle cosi' ottenute.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1234978A (en) 1968-04-24 1971-06-09 Brueck Schloesser & Co G M B H Hydraulic presses for pressing artificial stone
US4718842A (en) 1984-09-11 1988-01-12 Philippe Labbe Automatic press for controlling the force on each movable plate
DE4320203A1 (de) 1993-06-18 1994-12-22 B & B Maschinenbau Gmbh Wandung für eine Preßform und eine eine derartige Wandung einbeziehende Preßeinrichtung und Preßform
EP0659572A2 (de) 1993-12-27 1995-06-28 Seiko Epson Corporation Drucker und Verfahren zur Steuerung desselben
JP2003260600A (ja) 2002-03-11 2003-09-16 Kitagawa Elaborate Mach Co Ltd プレス装置およびプレス装置の制御方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009101500A1 (en) * 2008-02-15 2009-08-20 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Pressing apparatus and method
EP3401068A3 (de) * 2017-05-10 2019-01-16 Gape Due S.P.A. Form mit hoher kontrollierbarkeit
CN108818883A (zh) * 2018-07-09 2018-11-16 广东天恒液压机械有限公司 陶瓷压机电液控制方法及系统
CN108818883B (zh) * 2018-07-09 2023-11-14 广东天恒液压机械有限公司 陶瓷压机电液控制方法及系统

Also Published As

Publication number Publication date
EP1716998A3 (de) 2007-11-07
PL1716998T3 (pl) 2012-02-29
ITRE20050042A1 (it) 2006-10-27
EP1716998B1 (de) 2011-09-07
RU2441750C2 (ru) 2012-02-10
CN1853890A (zh) 2006-11-01
RU2006113028A (ru) 2008-05-27
ES2371769T3 (es) 2012-01-09

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