EP1529614A1 - Dispositif pour la décoration à sec de carreaux céramiques - Google Patents

Dispositif pour la décoration à sec de carreaux céramiques Download PDF

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Publication number
EP1529614A1
EP1529614A1 EP04077995A EP04077995A EP1529614A1 EP 1529614 A1 EP1529614 A1 EP 1529614A1 EP 04077995 A EP04077995 A EP 04077995A EP 04077995 A EP04077995 A EP 04077995A EP 1529614 A1 EP1529614 A1 EP 1529614A1
Authority
EP
European Patent Office
Prior art keywords
band
speed
roller
motor
conveyor
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Withdrawn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
EP04077995A
Other languages
German (de)
English (en)
Inventor
Bruno c/o SACMI Zauli
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
Publication of EP1529614A1 publication Critical patent/EP1529614A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0881—Machines for printing on polyhedral articles
    • 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
    • B28B11/001—Applying decorations on shaped articles, e.g. by painting
    • 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
    • B28B11/04—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers
    • B28B11/047—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers by pooring, e.g. curtain coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00—Printing machines of special types or for particular purposes
    • B41P2217/50—Printing presses for particular purposes
    • B41P2217/56—Printing presses for particular purposes for printing ceramic tiles

Definitions

  • the present invention relates to a device for dry-decorating ceramic tiles, of the type described in Italian Patent Application MO99A000141 and in European Patent Applications EP 1247629 and EP 1302289 in the name of TECNO-EUROPA.
  • the tile forming plants described in said documents relate to tile double pressing processes and comprise a device for dry decorating by the application of coloured powders.
  • the present invention specifically regards the system described in said documents for applying the dry decorations.
  • Said system provides for powder deposition through an acetate band in which powder-permeable regions with solid backgrounds or miscellaneous graphics are provided.
  • the acetate band is wound about two parallel rollers and slides against the base of a hopper having a curved, preferably semi-cylindrical shape.
  • the hopper contains the powder of the decoration to be applied to the tile, the bottom of the hopper presenting a transverse lower slot against which said band is made to slide.
  • the slot is opened and closed by pneumatic pistons positioned at the top of the structure.
  • the acetate band slides in contact with the tiles or at a short distance from them, its speed being perfectly synchronized with that of the tiles advancing on a roller conveyor, to ensure perfect execution of the decoration.
  • the acetate band winds about the front roller positioned downstream of the tile advancement direction, and unwinds from that positioned upstream.
  • the acetate band comprises various decorations, generally from two to six, depending on the tile formats.
  • the system After all the decorations have come into contact in succession with a like number of tiles advancing along the roller conveyor, the system rewinds the acetate band about the rear roller to then repeat the cycle.
  • the band is driven by a single electric motor connected to the front roller by a rigid transmission.
  • the electric motor is connected to the rear roller by elastic means forming a flexible coupling, the task of which is to absorb the difference in r.p.m. between the two rollers consequent on the band winding diameters during decoration, and to maintain the acetate band at a constant tension to prevent deformation of the decoration graphics.
  • Decoration is correctly achieved only if the acetate band remains perfectly in contact with the lower roller both during working and during rewinding.
  • the elastic means of known devices do not allow high rewinding speeds as they are unable to maintain a constant acetate band tension, hence the line has to be slowed down to the detriment of production, or the tile flow has to be halted until the acetate band has been completely rewound.
  • the object of the present patent is to remedy the stated drawbacks and problems within the framework of a simple and reliable solution.
  • each of the acetate band winding rollers is driven by its own motor.
  • the motor is keyed directly onto a reduction unit carrying a pinion which engages a gearwheel keyed onto the roller.
  • Each of the two motors is of brushless type operating in both directions of rotation, and is associated with its own regulator circuit which in one motor rotation direction is sensitive to motor operating speed, while in the opposite direction it is sensitive to the torque transmitted by the motor.
  • the two motors are regulated such that when the motor of one roller is controlled by speed, the motor of the other roller is controlled by torque, and vice versa.
  • the device of the invention operates by the improved method of operation defined in claims from 10 to 13.
  • Figure 1 is a schematic side view of the invention.
  • Figure 2 is a partial enlarged plan view of Figure 1.
  • Figure 3 is an enlarged detail of Figure 1.
  • the figures show schematically a roller conveyor 1, or motorized roller table, on which the partly compacted tiles 2 are advanced towards the press 3 for their final pressing.
  • the decorating device 4 of the present invention is positioned upstream of the press 3.
  • Said device comprises a front roller 5 and a rear roller 6, about which the band 7 carrying the powder-permeable regions defining the decorations is wound.
  • said band 7 is an acetate band, but can be of different type and/or nature provided it is suitable for the purpose.
  • the band 7 is stretched below the semi-cylindrical base 8 of a hopper 9 for the decorating powder, said hopper being provided with a lower mouth 90, or slot, for passage of the powder.
  • the band In proximity to its edges, the band presents a plurality of equidistant holes in which engage the teeth 10 (Figure 3) of two gearwheels 11 positioned to the sides of the band, and having the same diameter as the semi-cylindrical bottom of the hopper.
  • the whole assembly is supported by a frame 12 associated with means, such as the cylinder-piston unit 13, which position the bottom of the hopper either very close to or distant from the tiles 2 transiting on the roller conveyor 1.
  • this shows the scheme of the device control and operating circuit, comprising a photoelectric cell 14 for sensing the arrival of a tile 2, and means for measuring the roller table speed and the band advancement speed respectively.
  • said speed measurement means comprise a first encoder 15 connected to the roller table 1, and a second encoder 16 connected to the gearwheels 11 on which the band 7 winds.
  • the encoders 15 and 16 are set to measure the peripheral speed of the band 7 and of the rollers of the roller table.
  • the signals from the photoelectric cell 14 and encoders 15 and 16 are fed to the device control circuit controlling the operation of the motor 55 which is rigidly connected to the roller 5 and of the motor 66 which is rigidly connected to the roller 6.
  • Each of said motors is controlled by a card 50 and 60 which comprises a switch for switching between two operating and control modes.
  • a first operating mode of the motor 55 relates to a determined direction of rotation (anticlockwise direction in Figure 1), and provides for regulating the motor speed on the basis of the signals fed by the encoders 15 and 16 to the circuit 17.
  • the operating mode of the motor 66 which is made to rotate in the same direction of rotation as the motor 55, provides for regulating its torque to a constant value predetermined by the operator.
  • Said operating modes relate to the tile decoration stage.
  • the reference numerals 18, 19 and 18', 19' indicate the electrical connections by which the signals are fed to the motor cards 50 and 60, to control these latter in one operating mode or the other.
  • the invention operates in the following manner.
  • the control circuit senses the arrival of the tile 2 on the roller table 1 by means of the photoelectric cell 14.
  • the control circuit After a certain time set by the operator (on the basis of the distance of the tile 2 from the decorating device and the speed of the roller table), the control circuit starts the band 7.
  • Said band is made to move in the following manner:
  • the motor 55 drives the roller 5, winding said band such that its speed is equal to that of the tile 2 to decorate.
  • the speed of the motor 55 is controlled on the basis of the signals fed to the circuit 17 by the encoders 15 and 16.
  • the control circuit 17 coordinates the system synchronization (closed loop with feedback) such that the two speeds are identical, and that the decoration is perfectly in step with the tile 2.
  • the motor 55 maintains the band speed equal to that of the roller table 1, while the motor 66 maintains a constant torque (as set by the operator) to maintain the band 7 properly tensioned.
  • This stage is repeated identically for a certain number of cycles equal to the number of decorations present on the band 7, until winding is complete.
  • Rewinding takes place in the following manner: the control circuit 17 reverses the direction of rotation of the motors 55 and 66 and switches the speed and torque functions by feeding a suitable signal to the motor operating cards.
  • the motor 66 which initially operated by maintaining a constant torque, is now controlled only by speed, hence enabling full utilization of the potentiality of the motor to rewind the band 7 as quickly as possible.
  • the rewinding speed is no longer controlled under feedback with the speed of the roller table 1, but is based on the overall settings by the operator.
  • the motor 55 operates at constant torque to always maintain correct tension of the band 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Toys (AREA)
EP04077995A 2003-11-07 2004-11-01 Dispositif pour la décoration à sec de carreaux céramiques Withdrawn EP1529614A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE20030105 2003-11-07
ITRE20030105 ITRE20030105A1 (it) 2003-11-07 2003-11-07 Dispositivo decoratore a secco per piastrelle ceramiche.

Publications (1)

Publication Number Publication Date
EP1529614A1 true EP1529614A1 (fr) 2005-05-11

Family

ID=34430798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04077995A Withdrawn EP1529614A1 (fr) 2003-11-07 2004-11-01 Dispositif pour la décoration à sec de carreaux céramiques

Country Status (2)

Country Link
EP (1) EP1529614A1 (fr)
IT (1) ITRE20030105A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106584658A (zh) * 2016-12-12 2017-04-26 佛山市三水新明珠建陶工业有限公司 一种釉浆恒温淋釉稳定的淋釉方法
CN112512767A (zh) * 2018-08-01 2021-03-16 系统陶瓷股份公司 用于陶瓷产品的整体装饰的装置和方法
CN112606183A (zh) * 2021-01-08 2021-04-06 南京诺泽盈商贸有限公司 一种根据坯体直径调整上釉厚度的陶瓷上釉装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1247629A2 (fr) 2001-04-05 2002-10-09 Tecno Europa S.R.L. Dispositif pour la fabrication de carreaux
EP1302289A2 (fr) 2001-10-11 2003-04-16 Tecno - Europa S.R.L. Dispositif pour la fabrication de carreaux

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1247629A2 (fr) 2001-04-05 2002-10-09 Tecno Europa S.R.L. Dispositif pour la fabrication de carreaux
EP1302289A2 (fr) 2001-10-11 2003-04-16 Tecno - Europa S.R.L. Dispositif pour la fabrication de carreaux

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106584658A (zh) * 2016-12-12 2017-04-26 佛山市三水新明珠建陶工业有限公司 一种釉浆恒温淋釉稳定的淋釉方法
CN106584658B (zh) * 2016-12-12 2019-03-05 佛山市三水新明珠建陶工业有限公司 一种釉浆恒温淋釉稳定的淋釉方法
CN112512767A (zh) * 2018-08-01 2021-03-16 系统陶瓷股份公司 用于陶瓷产品的整体装饰的装置和方法
US11986976B2 (en) 2018-08-01 2024-05-21 System Ceramics S.P.A. Device and method for mass decoration of ceramic products
CN112606183A (zh) * 2021-01-08 2021-04-06 南京诺泽盈商贸有限公司 一种根据坯体直径调整上釉厚度的陶瓷上釉装置

Also Published As

Publication number Publication date
ITRE20030105A1 (it) 2005-05-08

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