EP0023747A1 - Procédé et dispositif pour la fabrication de carreaux en terre cuite - Google Patents

Procédé et dispositif pour la fabrication de carreaux en terre cuite Download PDF

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Publication number
EP0023747A1
EP0023747A1 EP80200734A EP80200734A EP0023747A1 EP 0023747 A1 EP0023747 A1 EP 0023747A1 EP 80200734 A EP80200734 A EP 80200734A EP 80200734 A EP80200734 A EP 80200734A EP 0023747 A1 EP0023747 A1 EP 0023747A1
Authority
EP
European Patent Office
Prior art keywords
strand
knife
knives
moldings
tiles
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
EP80200734A
Other languages
German (de)
English (en)
Other versions
EP0023747B1 (fr
Inventor
Gustaaf Johannes Schreurs
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.)
Keramische Industrie Tegelen Bv Te Tegelen
Original Assignee
Mosa BV
Koninklijke Mosa BV
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 Mosa BV, Koninklijke Mosa BV filed Critical Mosa BV
Publication of EP0023747A1 publication Critical patent/EP0023747A1/fr
Application granted granted Critical
Publication of EP0023747B1 publication Critical patent/EP0023747B1/fr
Expired 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
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting
    • B28B11/16—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting for extrusion or for materials supplied in long webs
    • 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
    • B28B17/0036—Cutting means, e.g. water jets

Definitions

  • the invention relates to a method for producing tiles by extrusion of a ceramic mass into a continuous strand, which is divided into the desired format length into moldings which are then dried, possibly glazed and fired, and extends to a knife and a device to carry out the procedure.
  • the method relates in particular to the production of the moldings for split tiles, which are split in a simple manner, as a result of which each molded product gives two tiles.
  • the strand is provided with a row extending over the strand width and coaxial over the strand length, which are separated from each other by ceramic material only to the extent that after firing the moldings, splitting over the longitudinal center of the moldings under the action lower forces can take place.
  • the cutting of a continuous strand of the ceramic material to the desired format length of the tiles can be accomplished with the help of cutting wires which are periodically moved against one another on both sides of the strand perpendicular to the transport direction.
  • a disadvantage of cutting with a cutting wire is that it can tear easily, which means a loss of production.
  • Another known method uses cutting knives which are only used when the strand is not in motion. It is obvious that this device is relatively complicated. This method also has the disadvantage that waste is generated.
  • the cutting methods described above have another disadvantage.
  • different pushing forces arise in the extruded strand over its cross section. These appear after the moldings have been cut off and dried. It can then be seen that from the center to the ends of the front side of the moldings in the transport direction, the moldings have a so-called advance.
  • the deviation from the straightness that occurs on the visible sides of the tiles after the moldings have been cut off is to be interpreted under advance. The size of this deviation depends on the properties of the key used.
  • the roughly matching negative advance shows the rear side of the moldings in the direction of transport of the strand. This undesirable and disadvantageous advance can also be seen after the molded articles have been fired. This gives moldings on which two sides are not straight. With the above Known cutting methods mentioned can not be equalized these advancements.
  • the invention has for its object to arrive at a method with which tiles can be produced by extrusion of a ceramic mass into a continuous strand, which is cut to the desired format length into moldings, which show tiles after drying, glazing and firing, which do not have the disadvantages mentioned above.
  • the moldings are cut to length by at least one knife according to the inventive method, the longitudinal surface of which runs in an arc directed against the direction of transport of the strand, so that the cut surface of the end of the molding pointing to the respective strand end runs in a convex arc over the width of the molding.
  • This bending of the knives in the middle of their longitudinal surface is 0.1% to 0.7% of the width of the strand to be cut.
  • the deflection of the knives is preferably selected to be 0.3% to 0.5% of the width of the strand to be cut.
  • the continuously advanced strand of the ceramic mass is periodically aligned on both sides of the strand perpendicular to the direction of transport of the strand cutters moving against each other cut to format length.
  • the cutting knives move synchronously with the strand transport.
  • the knives on both sides of their longitudinal surface are provided with recessing elements which have the same bend as the knives.
  • the knives and the pressing elements are preferably made of a wear-resistant material that does not adhere to the ceramic mass
  • the knife blade thickness is linked to specific conditions. On the one hand, the knife will be chosen as thin as possible so as not to squeeze the channels between the tile halves during the cutting. This also leads to the so-called collapse of the strand during the transport of the cut strand. On the other hand, it is preferred to choose a thicker blade in order to achieve a higher mechanical and better wear resistance and thus a longer service life.
  • the knife blade thickness can be selected between 0.3 mm and 1.2 mm, preferably between 0.5 mm and 1.0 mm.
  • the invention also relates to a device for carrying out the method according to the invention.
  • the device consists of a carriage, which is provided with means for periodically, synchronized tracking of the carriage with the strand and further means has to move the cutting knives on one or both sides of the strand perpendicular to the direction of transport of the strand and to carry out this movement at times, so that the same format lengths are always cut from the strand.
  • an extrusion press 1 presses a continuous strand 2 of ceramic mass, which is provided over its cross section with a series of channels 3 which extend coaxially over the length of the strand and are separated from one another by ceramic mass 4.
  • the strand 2 is provided with pressed-in side edges 5 of slight depth during the pressing, which form abutting edges after the tiles have been fired.
  • Knives 6 are arranged on the side of the strand 2 and are clamped in holders 7. The knives 6 periodically move against one another, as a result of which moldings 8 are cut off. The knives 6 are slightly offset from one another in the direction of transport of the strand, so that the sharp knife edges when the shape is cut off do not touch from the strand.
  • recessing members 9 are arranged on both sides of the knives 6, which at the same time press the edges of the moldings somewhat during the cutting movement in addition to cutting through the strand 2, so that after the firing of the Moldings the front and back of the tiles are also provided with butt edges.
  • the knives 6 and the press-in members 9 are clamped in a holder which consists of parts 12 and 13, the sides of which bear against the knife 6 and the push-in members 9 and are bent such that the desired deflection when the knife 6 and the push-in members 9 are clamped in of the knife 6 and the pressing elements 9 is obtained.
  • the deflection of the knives 6 is 0.1% to 0.7% of the width of the strand 2. In the advance that occurs in practice, the deflection of the knives 6 is preferably chosen to be 0.3% to 0.5% of the width of the strand 2.
  • the knives 6 as well as the push-in members 9 are made of wear-resistant material which is not adhesive to ceramic mass.
  • Spring steel can be used for the knives 6, e.g. is hard chrome plated.
  • the press-in members 9 can be made of brass, the z. B. is also chrome-plated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
EP80200734A 1979-08-04 1980-08-01 Procédé et dispositif pour la fabrication de carreaux en terre cuite Expired EP0023747B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2931728 1979-08-04
DE19792931728 DE2931728A1 (de) 1979-08-04 1979-08-04 Verfahren, messer und vorrichtung zur herstellung von fliesen

Publications (2)

Publication Number Publication Date
EP0023747A1 true EP0023747A1 (fr) 1981-02-11
EP0023747B1 EP0023747B1 (fr) 1983-06-29

Family

ID=6077664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80200734A Expired EP0023747B1 (fr) 1979-08-04 1980-08-01 Procédé et dispositif pour la fabrication de carreaux en terre cuite

Country Status (2)

Country Link
EP (1) EP0023747B1 (fr)
DE (2) DE2931728A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT400120B (de) * 1985-06-26 1995-10-25 Braas Gmbh Verfahren und vorrichtung zur herstellung von dachsteinen
DE10045544A1 (de) * 2000-09-07 2002-03-28 Siemens Ag Verfahren zum Aufbringen einer Beschichtung auf eine Lampe und beschichtete Lampe
US6802921B1 (en) * 2000-03-29 2004-10-12 Boss Profiles Limited Process and system for vitrified extruded ceramic tiles and profiles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4215646C2 (de) * 1992-05-13 1998-04-09 Schmitz Tona Tonwerke Vorrichtung zum Querschneiden eines weichplastischen Massestranges

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1973092A (en) * 1932-02-12 1934-09-11 Ludowici Celadon Company Method and apparatus of forming tile
DE2258575B1 (de) * 1972-11-30 1974-01-31 Hans Lingl Verfahren und vorrichtung zum herstellen von keramischen platten mit ornamentformen
DE2341631B1 (de) * 1973-08-17 1975-01-09 Hans Lingl Vorrichtung zum Herstellen von keramischen Platten mit Ornamentformen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1973092A (en) * 1932-02-12 1934-09-11 Ludowici Celadon Company Method and apparatus of forming tile
DE2258575B1 (de) * 1972-11-30 1974-01-31 Hans Lingl Verfahren und vorrichtung zum herstellen von keramischen platten mit ornamentformen
DE2341631B1 (de) * 1973-08-17 1975-01-09 Hans Lingl Vorrichtung zum Herstellen von keramischen Platten mit Ornamentformen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT400120B (de) * 1985-06-26 1995-10-25 Braas Gmbh Verfahren und vorrichtung zur herstellung von dachsteinen
US6802921B1 (en) * 2000-03-29 2004-10-12 Boss Profiles Limited Process and system for vitrified extruded ceramic tiles and profiles
DE10045544A1 (de) * 2000-09-07 2002-03-28 Siemens Ag Verfahren zum Aufbringen einer Beschichtung auf eine Lampe und beschichtete Lampe
DE10045544C2 (de) * 2000-09-07 2002-09-12 Siemens Ag Verfahren zum Aufbringen einer Beschichtung auf eine Lampe

Also Published As

Publication number Publication date
DE3063975D1 (en) 1983-08-04
EP0023747B1 (fr) 1983-06-29
DE2931728A1 (de) 1981-02-19

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