EP1533109A2 - Poinçon de presse pour la fabrication des ébauches de carreaux en céramique et presse équipée de ce poinçon - Google Patents

Poinçon de presse pour la fabrication des ébauches de carreaux en céramique et presse équipée de ce poinçon Download PDF

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Publication number
EP1533109A2
EP1533109A2 EP04026434A EP04026434A EP1533109A2 EP 1533109 A2 EP1533109 A2 EP 1533109A2 EP 04026434 A EP04026434 A EP 04026434A EP 04026434 A EP04026434 A EP 04026434A EP 1533109 A2 EP1533109 A2 EP 1533109A2
Authority
EP
European Patent Office
Prior art keywords
stamp
pressure sensors
pressure
cover plate
press
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Withdrawn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
EP04026434A
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German (de)
English (en)
Other versions
EP1533109A3 (fr
Inventor
Tom Engmann
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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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1533109A2 publication Critical patent/EP1533109A2/fr
Publication of EP1533109A3 publication Critical patent/EP1533109A3/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/065—Press rams
    • 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
    • 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
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0094—Press load monitoring means

Definitions

  • the invention relates to a press die for manufacturing ceramic tile blanks of compacted powdery Granules in a mold, with a stamp base plate, a stamp cover plate and pressure sensors for measuring by the stamp cover plate in adjacent zones on the Stamp base plate transmitted pressure reaction forces.
  • a punch of this type is known from EP 0893217 A1.
  • the stamp cover plate consists of a rubber elastic polymer and between the Stamp cover plate and the stamp base plate an oil pad is interposed.
  • the space containing the oil filling in the stamp base plate is perpendicular to the Plate surface extending ridges in several chambers divided.
  • Each chamber is a pressure sensor and a valve assigned.
  • the valves When the valves are open, the oil pressure in all Chambers equal, and the press stamp has the function of a isostatic press stamp. With closed valves can the pressure-reaction forces acting on the individual chambers associated zones of the stamp cover plate act through the Pressure sensors are determined.
  • the signals of the pressure sensors serve to measure the density distribution of the granules at the end of the pressing process and can be used to correct the filling process be used.
  • This well-known press stamp makes for measuring the Density distribution in the tile blank takes advantage of the fact that with uneven distribution of the powdery Granules in the mold at the end of the pressing process the bodies correspondingly higher reaction forces with higher compression cause the surface of the stamp cover plate while Make lower compaction of the material lower Reaction forces on the surface of the stamp cover plate require.
  • the measurement of these reaction forces in the different zones of the stamp cover plate allows so Immediate conclusions about the distribution of the mixture in the mold.
  • the control of the density distribution with the help of the press ram itself has the advantage of being continuous, that is to say every tile blank, can be done. It does not require one additional work and time, since they are in the Pressing process is integrated. Because the measurements at each single tile blank can be made immediately in the production process be intervened if at a Tile blank detected a faulty density distribution becomes.
  • the well-known isostatic press stamp one such continuous control is allowed, however, is complicated in its structure and puts its profitability by high Acquisition costs and high maintenance costs in question.
  • the measurement of the density distribution in the Tile blanks still in the way that during the Production at regular intervals a tile blank in a number of samples are divided, of which the density is on Conventional way by measuring the weight and the Volume of the samples, and from this the density distribution in the Tile blanks is determined.
  • the invention is based on the object, a press ram to develop with the features mentioned, the simpler in its construction and more robust in practical operation is.
  • this object is achieved in that the Pressure sensors directly between the stamp base plate and the stamp cover plate are arranged to be made of flat Sensors consist, the pressure of their electrical Change properties, and that the thickness of the stamp cover plate depending on the specific pressing pressure and the Sensitivity of the pressure sensors is selected.
  • the sensors can, for example, pressure sensors off Be materials that under pressure their electrical Change resistance.
  • the sensors can also from a consist of piezoelectric material, that is from a Material in which a current flow occurs under pressure. These piezoelectric materials may be both to inorganic crystalline substances as well as to certain Polymers act whose molecules upon solidification by applying be aligned with a strong electric field.
  • the pressure sensor system can be designed, for example be that between the stamp base plate and the Stamp deck several independent and after a predetermined distribution pattern arranged pressure sensors are provided. In this case, therefore, come small-scale single pressure sensors for use, either gapless or at more or less great distances from each other are arranged.
  • the pressure sensor system may also be a between the stamp base plate and the stamp cover plate arranged large-scale pressure sensor act whose Surface by suitable structuring in a number of Single sensors is divided.
  • the pressure sensor system of a large-area layer of a material that is at Pressure action changes its electrical resistance, and that the layer on each side with a crowd strip-shaped electrodes is in contact, wherein the Electrode on one side of the layer Electrode on the other side of the layer under one Angle crosses, with the electrical resistance of the layer in each case at the crossing points of the electrodes for the determination the pressure-reaction forces is used.
  • suitable plate-shaped pressure sensor systems are as such known and commercially available.
  • the press die according to the invention has a relative simple construction, making it less in the making consuming and less prone to failure in operation than the known isostatic press stamp.
  • the pressure sensor system is in a plate-shaped, with the necessary connection elements arranged component arranged as such between the Stamp base plate and the stamp cover plate is interposed.
  • This device can expediently as a separate component interchangeable with the Stamp base plate and the stamp cover plate screwed become.
  • the necessary elastic deformability of the stamp cover plate is of the accuracy of those obtained from the pressure sensors Information dependent.
  • its thickness may vary according to its size and about 10 depending on the applied pressing pressure up to 20 mm.
  • the deformed Stamp cover plate at the applied high pressing pressures of 250 to 600 bar slightly when in the tile blank Density differences exist.
  • These minor ones Deflections of the stamp cover plate in the order of A few hundredths of a millimeter are enough to get from the Pressure sensors to obtain signals that are relatively accurate correspond to the pressure differences.
  • the signals supplied by the pressure sensor system can be described as such for the control of the production process be used. For example, these signals can do so serve to control the filling device for the molds so that at the next filling of the molds on the Whole area of the mold reaches a uniform level becomes.
  • Such an automatic filling device is z.
  • the signals can also be used for this purpose be, in a press, in which on a stamp carrier plate Several isostatic press punches are arranged, the amount the incompressible fluid in the isostatic To regulate pressing punches, so as to the pressing pressure in the individual Correct pressing molds. Suitable for this purpose isostatic press punches are for example in the European Patent Application 04021860.
  • the signals of the pressure sensor system can also directly converted into density values.
  • stamp carrier plate 2 is in turn attached to a crossbeam, not shown, on which the impression cylinders act.
  • the upper press punches interact with unillustrated lower punching dies, which rest on the press table via corresponding support bodies or mounted on a movable ejection mechanism, which allows the raising and lowering of the lower ram.
  • the press ram system according to the invention can optionally in the be integrated in the upper or in the lower punch.
  • Each ram 1 comprises a stamp base 3 and a stamp plate 4 attached to stamp base 3 which is made of hardened steel, for example.
  • stamp base 3 which is made of hardened steel, for example.
  • stamp cover plate 4 At a Side length of the stamp cover plate 4, for example, 30 cm The thickness of the stamp cover plate 4 is about 12 mm.
  • Fig. 1 are between the stamp base plate 3 and the stamp cover plate 4 Evenly distributed over the surface pressure sensors 6 arranged.
  • pressure sensors for example, commercially available individual pressure sensors of the type PST of the company Steadlands are used as their pressure increases change electrical resistance.
  • the of the pressure sensors. 6 supplied electrical signals are not sent to one shown control unit forwarded.
  • the signals are further processed and serve on the one hand to display the density distribution and to control the press through threshold parameters that are met have to.
  • Fig. 2 shows an embodiment with a large area Pressure sensor that extends substantially over the entire Cross section of the press ram extends.
  • This Pressure sensor system comprises a continuous layer 16 from a material that under pressure its resistance changes. The layer 16 is in contact on one side with a bevy of parallel to each other strip-shaped electrodes 17, and on the other side also with a crowd parallel to each other Electrodes 18 which are at right angles to the electrodes 17 run. At each crossing point of two electrodes can be read a signal at the corresponding electrodes, the at this point acting on the layer 16 compressive force equivalent.
  • Pressure sensor systems of this type are also known as such known and, for example as "I-scan system" of Company Tekscan commercially available.
  • Suitable pressure sensors the physical effect of Exploiting piezoelectricity, are also commercially available available, for example, the piezoelectric Foil sensors of the company Mirow Systemtechnik GmbH.
  • These Piezoelectric film sensors consist of a metal steamed plastic layer whose molecules solidify aligned by applying a strong electric field become. When pressure is applied to the film, move the electrical charges, causing a current flow arises. Leave by appropriate structuring of the surface accommodate any number of individual sensors. With help a specially developed electronics are the small Charge shifts strengthened accordingly and deliver so the desired electrical signals.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Automation & Control Theory (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
EP04026434A 2003-11-12 2004-11-08 Poinçon de presse pour la fabrication des ébauches de carreaux en céramique et presse équipée de ce poinçon Withdrawn EP1533109A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10352755 2003-11-12
DE10352755 2003-11-12
DE102004002733 2004-01-20
DE102004002733 2004-01-20

Publications (2)

Publication Number Publication Date
EP1533109A2 true EP1533109A2 (fr) 2005-05-25
EP1533109A3 EP1533109A3 (fr) 2007-12-12

Family

ID=34436329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04026434A Withdrawn EP1533109A3 (fr) 2003-11-12 2004-11-08 Poinçon de presse pour la fabrication des ébauches de carreaux en céramique et presse équipée de ce poinçon

Country Status (1)

Country Link
EP (1) EP1533109A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2296499A1 (es) * 2006-01-24 2008-04-16 Macer S.L. Moldes inteligentes para el prensado de pavimento y revestimiento ceramico.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2812689C2 (de) * 1978-03-23 1982-05-19 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Piezoelektrischer Beschleunigungsaufnehmer
US4739666A (en) * 1983-12-12 1988-04-26 Pfister Gmbh Flat-spread force measuring device
DE8813774U1 (de) * 1988-11-03 1990-03-01 Otto Kaiser GmbH & Co KG, 7518 Bretten Presse oder Stanze
JP3055708B2 (ja) * 1991-03-29 2000-06-26 新東工業株式会社 液晶パネル製造用プレス装置
DE4221895A1 (de) * 1992-07-03 1994-01-05 Siempelkamp Gmbh & Co Kontinuierliche Presse für die Herstellung von Spanplatten, Faserplatten, Laminatplatten u. dgl.
US5911158A (en) * 1996-02-29 1999-06-08 The United States Of America As Represented By The Secretary Of The Air Force Piezoelectric strain sensor array

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2296499A1 (es) * 2006-01-24 2008-04-16 Macer S.L. Moldes inteligentes para el prensado de pavimento y revestimiento ceramico.
ES2296499B1 (es) * 2006-01-24 2008-12-16 Macer S.L. Moldes inteligentes para el prensado de pavimento y revestimiento ceramico.

Also Published As

Publication number Publication date
EP1533109A3 (fr) 2007-12-12

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