EP2777938A1 - Kopf zum digitalen Dekorieren von keramischen Produkten - Google Patents

Kopf zum digitalen Dekorieren von keramischen Produkten Download PDF

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Publication number
EP2777938A1
EP2777938A1 EP14158258.5A EP14158258A EP2777938A1 EP 2777938 A1 EP2777938 A1 EP 2777938A1 EP 14158258 A EP14158258 A EP 14158258A EP 2777938 A1 EP2777938 A1 EP 2777938A1
Authority
EP
European Patent Office
Prior art keywords
head
magnetic field
clogging
opening
return means
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
EP14158258.5A
Other languages
English (en)
French (fr)
Other versions
EP2777938B1 (de
Inventor
Valdo Elmetti
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.)
TECNO-ITALIA Srl
Original Assignee
TECNO-ITALIA 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 TECNO-ITALIA Srl filed Critical TECNO-ITALIA Srl
Publication of EP2777938A1 publication Critical patent/EP2777938A1/de
Application granted granted Critical
Publication of EP2777938B1 publication Critical patent/EP2777938B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2002/041—Electromagnetic transducer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/05—Heads having a valve

Definitions

  • the present invention relates to a head for the digital decoration of ceramic products.
  • the machines for digital printing available on the market nowadays generally comprise a plurality of print heads able to dispense a particular type of ink.
  • the heads of known type used for the decoration of ceramic tiles comprise a body inside which a channel for the transit of ink is obtained and which has with an inlet port and an outlet port of the ink itself.
  • a flexible blade is arranged that is activated from time to time to control the ink outflow. Such blade is therefore able to exert a mechanical action on the ink in order to apply the force necessary to allow the outflow to the outside.
  • the ceramic glazes are significantly more aggressive from the chemical point of view compared to those used in the marking field, it follows that the return spring undergoes a very fast erosion and wear action thus causing the breakage of the same and the malfunction of the head.
  • the main aim of the present invention is to provide a head for the digital decoration that allows the use of ceramic glaze generally used in traditional ceramic decorations and that at the same time allows to obtain a high quality decoration.
  • one object of the present invention is to enable the dispensing of a greater amount of glaze compared to the heads used in the ceramic sector up to now, in order to obtain a better decoration from a quality point of view.
  • Yet another object is to provide a head for the digital printing that it is able to operate in a precise and safe way at both low and high frequencies.
  • Not the latest object of the present invention is to provide a head that is durable over time and which, therefore, requires a number of maintenance jobs significantly reduced compared to the heads of known type.
  • Another object of the present invention is to provide a head for the digital decoration of ceramic products which allows to overcome the above mentioned drawbacks of the prior art within a simple, rational, easy and effective to use as well as economic solution.
  • reference number 1 globally indicated by reference number 1 is a head for the digital decoration of ceramic products.
  • the head 1 comprises a body 2 inside which a channel 3 is defined for the transit of a ceramic glaze having an inlet port 3a and an outlet port 3b for the glaze itself.
  • the channel 3 has an elongated shape and the inlet and outlet ports 3a and 3b are defined in correspondence to its opposite longitudinal extremities.
  • the inlet port 3a and the outlet port 3b are defined in correspondence to the upper extremity and the lower extremity of the transit channel 3, respectively.
  • the channel 3 is under pressure, approx. 1-2 bar.
  • the body 2 comprises a tubular element 2a having an elongated shape and at least a base element 2b, which can be accomplished in one or more parts, associated with the lower extremity of the tubular element 2a.
  • the tubular element 2a and the base element 2b define the inlet port 3a and the outlet port 3b, respectively.
  • a clogging element 4 which is movable between a closing position, wherein it blocks the outlet port 3b to prevent the glaze outflow, and an opening position, wherein it releases the outlet port itself to enable the dispensing of glaze. More particularly, the clogging element 4 cooperates with the body 2 in the closing position to block the outlet port 3b, while it is moved away from the latter in the opening position in order to allow the outflow of glaze.
  • the clogging element 4 is movable sliding in a longitudinal direction, inside the channel 3.
  • the clogging element 4 is then moved longitudinally inside the channel itself from the closing position towards the opening position. Since, in use, the head 1 is arranged vertically, it follows that in the opening position the clogging element 4 is raised with respect to the closing position and vice versa.
  • the clogging element 4 comprises a stem 4a with which is associated, in correspondence to its lower extremity, a closing element 4b able to cooperate with the body 2 in order to block or release the outlet port 3b.
  • the closing element 4b has a larger cross section than the stem 4a.
  • the clogging element 4 then comprises at least one ferromagnetic element 6a, 6b. More in detail, the ferromagnetic element 6a, 6b is integrally associated with the stem 4a.
  • the guide element 5 for guiding the clogging element 4. More particularly, the guide element 5 has a through hole inside which is inserted the stem 4a and one or more glaze transit ducts 5a communicating with the channel 3.
  • the guide element 5 also defines an abutment surface 5b of the closing element 4b able to limit the shift of the clogging element 4 away from the outlet port 3b.
  • the end-of-stroke stops of the clogging element 4 are therefore defined in one direction by the abutment surface 5b described above and in the opposite direction by the body 2 against which the closing element 4b rests in the closing position.
  • the ferromagnetic element 6a, 6b is arranged on the side opposite the closing element 4b with respect to the guide element 5.
  • the head 1 also comprises opening means 7, which can be activated to generate a magnetic field able to exert a force of attraction on the clogging element 4, and in particular on its ferromagnetic element 6a, 6b, to bring it to the opening position.
  • the opening means 7 can be controlled between an active configuration, wherein they generate a first magnetic field able to attract the clogging element 4 to cause it to shift towards the opening position, and an inactive configuration, wherein they interrupt the first magnetic field and, consequently, also the force applied on the clogging element 4.
  • the opening means 7 are arranged externally to the body 2 to surround at least a first portion of the channel 3.
  • the opening means 7 are therefore fitted around a first portion of the channel 3.
  • the opening means 7 are composed, e.g., of an electromagnet.
  • the electromagnet consists in a core made of ferromagnetic material on which a solenoid is wrapped (in figure 2 only the interspace is visible obtained in the ferromagnetic core and intended to house the solenoid).
  • the electromagnet 7 has a tubular shape and is arranged around the aforesaid first portion of the channel 3 coaxially to it. It follows, therefore, that the electromagnet 7 is crossed along its entire longitudinal extension by the channel 3, so that the glaze contained within the latter also performs a cooling function of the electromagnet itself.
  • the head 1 also comprises return means 8 able to generate a second magnetic field, of the permanent type, to attract the clogging element 4 towards the closing position with the opening means 7 in the inactive configuration.
  • the second magnetic field generated by the return means 8 exerts a force of attraction on the ferromagnetic element 6a, 6b.
  • the return means 8 are arranged externally to the body 2 to surround at least a second portion of the channel 3.
  • the return means 8 are composed, e.g., of at least a permanent magnet, two in the embodiment represented in figure 2 , having annular shape and fitted inside the aforesaid second portion of the channel 3.
  • the opening means 7 and the return means 8 are sized in such a way that the force exerted by the first magnetic field on the clogging element 4 is of greater intensity than that exerted on the clogging element itself by the second magnetic field.
  • the clogging element 4 therefore returns to the closing position only after the deactivation of the opening means 7, i.e. when the first magnetic field is interrupted and the only force acting on it is that due to the second magnetic field.
  • the opening means 7 are arranged on top of (with reference to the direction taken, in use, by the head 1) the return means 8.
  • the opening means 7 are arranged on the side of the inlet port 3a, while the return means 8 are arranged on the side of the outlet port 3b.
  • the clogging element 4 comprises at least two ferromagnetic elements 6a, 6b which are spaced apart from one another. More particularly , the clogging element 4 comprises a first ferromagnetic element 6a and a second ferromagnetic element 6b integrally associated with the stem 4a and longitudinally spaced apart from one another.
  • the first and the second ferromagnetic elements 6a and 6b are arranged, with the clogging element 4 in the closing position in correspondence to the opening means 7 and in the proximity of the return means 8, respectively.
  • This arrangement of the ferromagnetic elements 6a and 6b causes each of them being within the magnetic field generated by the opening means 7 and the return means 8, respectively.
  • each ferromagnetic element 6a, 6b has a larger cross section than that of the stem 4a. More in detail, each ferromagnetic element 6a, 6b is arranged substantially snugly inside the channel 3 and has a respective through hole 9 able to allow the outflow of the glaze through it.
  • the head 1 also comprises a spacing element 10 arranged between the opening means 7 and the return means 8.
  • a spacing element 10 is made of an insulating material, this term referring to a material which is impervious to the magnetic field.
  • the spacing element 10 is particularly able to space apart longitudinally the return means 8 from the opening means 7 in such a way as to reduce the interference between the magnetic fields generated by the same.
  • the spacing element 10 is able to increase the distance between the first ferromagnetic element 6a and the return means 8, so as to reduce the effect of the second magnetic field on the first ferromagnetic element itself.
  • the first ferromagnetic element 6a is therefore arranged, with the clogging element 4 in closing position, at a distance from the return means 8 so as not to be affected by the second magnetic field generated by the same.
  • the spacing element 10 is interposed between the opening means 7 (arranged above) and the base element 2b (arranged below).
  • the clogging element 4 Under normal operating conditions, the clogging element 4 is in the closing position, in which it blocks the outlet port 3b with its closing element 4b. More in detail, in this use configuration, the clogging element 4 is maintained in closing position due to the force of attraction exerted by the second magnetic field generated by the return means 8.
  • the opening means 7 are activated by making electric power to circulate inside the relative electromagnet. Due to the effect of this activation the opening means 7 generate a relative magnetic field which exerts a force of attraction on the first ferromagnetic element 6a of such an intensity to cause the displacement thereof away from the outlet port 3b. As already anticipated above, the force applied on the first ferromagnetic element 6a by the magnetic field generated by the opening means 7 is of greater intensity than that exerted on the second ferromagnetic element 6b by the permanent magnetic field generated by the return means 8.
  • the clogging element 4 is raised with respect to the closing position so as to allow the outflow of glaze.
  • the circulation of electric power is interrupted in the electromagnet 7, thus interrupting consequently the first magnetic field, so that the clogging element 4 is promptly brought back to the closing position.
  • the described invention achieves the proposed objects and in particular the fact is stressed that the head, which is the subject of the present invention, allows the use of traditional ceramic glazes and, at the same time, a safe and precise operation over time.
  • the use of one or more permanent magnets arranged outside the glaze transit channel and able to draw the clogging element towards the closing position allows to adjust at will the opening time of the outlet port, and therefore the quantity of dispensed glaze, as well as to prevent the high aggressiveness of the glaze itself from affecting the return means thus impairing the operation of the head itself.
  • the magnetic start of the clogging element both in the opening and closing condition, allows the use of the head at any working rate and significantly increases the duration compared to those of known type, there being no moving parts mechanically connected to each other.

Landscapes

  • Adornments (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
EP14158258.5A 2013-03-15 2014-03-07 Kopf zum digitalen Dekorieren von keramischen Produkten Active EP2777938B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000069A ITMO20130069A1 (it) 2013-03-15 2013-03-15 Testina per la decorazione digitale di manufatti ceramici

Publications (2)

Publication Number Publication Date
EP2777938A1 true EP2777938A1 (de) 2014-09-17
EP2777938B1 EP2777938B1 (de) 2016-01-06

Family

ID=48096049

Family Applications (1)

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EP14158258.5A Active EP2777938B1 (de) 2013-03-15 2014-03-07 Kopf zum digitalen Dekorieren von keramischen Produkten

Country Status (3)

Country Link
EP (1) EP2777938B1 (de)
ES (1) ES2567474T3 (de)
IT (1) ITMO20130069A1 (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016135545A1 (en) * 2015-02-27 2016-09-01 G.Tech S.R.L. Printing device and machine for printing ceramic tiles or slabs
ITUB20151903A1 (it) * 2015-07-08 2017-01-08 System Spa Dispositivo attuatore, in particolare per una testina di stampa a getto di inchiostro, con sistema di raffreddamento
WO2018108571A1 (de) * 2016-12-14 2018-06-21 Dürr Systems Ag Druckkopf mit temperiereinrichtung
IT201600131820A1 (it) * 2016-12-28 2018-06-28 Cementhai Ceram Co Ltd Dispositivo e macchina di stampa per manufatti in materiale da costruzione
IT201700067828A1 (it) * 2017-06-19 2018-12-19 Kromia S R L Macchina di smaltatura per supporti ceramici.
US11154892B2 (en) 2016-12-14 2021-10-26 Dürr Systems Ag Coating device for applying coating agent in a controlled manner
US11167297B2 (en) 2016-12-14 2021-11-09 Dürr Systems Ag Print head for the application of a coating agent
US11167308B2 (en) 2016-12-14 2021-11-09 Dürr Systems Ag Print head for the application of a coating agent on a component
US11167302B2 (en) 2016-12-14 2021-11-09 Dürr Systems Ag Coating device and associated operating method
US11203030B2 (en) 2016-12-14 2021-12-21 Dürr Systems Ag Coating method and corresponding coating device
US11338312B2 (en) 2016-12-14 2022-05-24 Dürr Systems Ag Print head and associated operating method
US11440035B2 (en) 2016-12-14 2022-09-13 Dürr Systems Ag Application device and method for applying a multicomponent coating medium
US11504735B2 (en) 2016-12-14 2022-11-22 Dürr Systems Ag Coating device having first and second printheads and corresponding coating process
US11944990B2 (en) 2016-12-14 2024-04-02 Dürr Systems Ag Coating device for coating components
US11975345B2 (en) 2016-12-14 2024-05-07 Dürr Systems Ag Coating installation and corresponding coating method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185384A1 (de) * 1984-12-21 1986-06-25 Atech Aktiebolag Flüssigkeitsstrahldrucker
DE4139731A1 (de) * 1991-12-03 1993-06-09 Inno-Print Verpackungs- + Beschriftungssysteme Gmbh, 5060 Bergisch Gladbach, De Tintenstrahl-matrixdrucker aus einzelelementen
US6170766B1 (en) * 1997-11-25 2001-01-09 Focke & Co. (Gmbh & Co.) Valve, in particular glue valve
WO2003070469A1 (en) * 2002-02-20 2003-08-28 Xaar Technology Limited Actuation device and use thereof in fluid pumping and droplet deposition
US20040089750A1 (en) * 2002-10-23 2004-05-13 Muniswamappa Anjanappa Micro-array fluid dispensing apparatus and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185384A1 (de) * 1984-12-21 1986-06-25 Atech Aktiebolag Flüssigkeitsstrahldrucker
DE4139731A1 (de) * 1991-12-03 1993-06-09 Inno-Print Verpackungs- + Beschriftungssysteme Gmbh, 5060 Bergisch Gladbach, De Tintenstrahl-matrixdrucker aus einzelelementen
US6170766B1 (en) * 1997-11-25 2001-01-09 Focke & Co. (Gmbh & Co.) Valve, in particular glue valve
WO2003070469A1 (en) * 2002-02-20 2003-08-28 Xaar Technology Limited Actuation device and use thereof in fluid pumping and droplet deposition
US20040089750A1 (en) * 2002-10-23 2004-05-13 Muniswamappa Anjanappa Micro-array fluid dispensing apparatus and method

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016135545A1 (en) * 2015-02-27 2016-09-01 G.Tech S.R.L. Printing device and machine for printing ceramic tiles or slabs
US10272677B2 (en) 2015-07-08 2019-04-30 System S.P.A. Actuating device, in particular for ink jet printheads with cooling system
ITUB20151903A1 (it) * 2015-07-08 2017-01-08 System Spa Dispositivo attuatore, in particolare per una testina di stampa a getto di inchiostro, con sistema di raffreddamento
WO2017006246A1 (en) * 2015-07-08 2017-01-12 System S.P.A. An actuating device, in particular for ink jet printheads with cooling system
US11298717B2 (en) 2016-12-14 2022-04-12 Dürr Systems Ag Print head having a temperature-control device
US11440035B2 (en) 2016-12-14 2022-09-13 Dürr Systems Ag Application device and method for applying a multicomponent coating medium
US11975345B2 (en) 2016-12-14 2024-05-07 Dürr Systems Ag Coating installation and corresponding coating method
US11944990B2 (en) 2016-12-14 2024-04-02 Dürr Systems Ag Coating device for coating components
US11878317B2 (en) 2016-12-14 2024-01-23 Dürr Systems Ag Coating device with printhead storage
US11813630B2 (en) 2016-12-14 2023-11-14 Dürr Systems Ag Coating method and corresponding coating device
US11154892B2 (en) 2016-12-14 2021-10-26 Dürr Systems Ag Coating device for applying coating agent in a controlled manner
US11167297B2 (en) 2016-12-14 2021-11-09 Dürr Systems Ag Print head for the application of a coating agent
US11167308B2 (en) 2016-12-14 2021-11-09 Dürr Systems Ag Print head for the application of a coating agent on a component
US11167302B2 (en) 2016-12-14 2021-11-09 Dürr Systems Ag Coating device and associated operating method
US11203030B2 (en) 2016-12-14 2021-12-21 Dürr Systems Ag Coating method and corresponding coating device
WO2018108571A1 (de) * 2016-12-14 2018-06-21 Dürr Systems Ag Druckkopf mit temperiereinrichtung
US11338312B2 (en) 2016-12-14 2022-05-24 Dürr Systems Ag Print head and associated operating method
US11504735B2 (en) 2016-12-14 2022-11-22 Dürr Systems Ag Coating device having first and second printheads and corresponding coating process
WO2018122737A1 (en) * 2016-12-28 2018-07-05 Cementhai Ceramics Co., Ltd. Printing device and machine for building material articles
CN110430982B (zh) * 2016-12-28 2021-03-30 Scg建筑材料有限公司 用于建筑材料制品的印刷装置和机器
CN110430982A (zh) * 2016-12-28 2019-11-08 Scg建筑材料有限公司 用于建筑材料制品的印刷装置和机器
IT201600131820A1 (it) * 2016-12-28 2018-06-28 Cementhai Ceram Co Ltd Dispositivo e macchina di stampa per manufatti in materiale da costruzione
IT201700067828A1 (it) * 2017-06-19 2018-12-19 Kromia S R L Macchina di smaltatura per supporti ceramici.

Also Published As

Publication number Publication date
ITMO20130069A1 (it) 2014-09-16
EP2777938B1 (de) 2016-01-06
ES2567474T3 (es) 2016-04-22

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