EP4364856A1 - Appareil pour lavage d'une tête de revêtement par fentes - Google Patents

Appareil pour lavage d'une tête de revêtement par fentes Download PDF

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Publication number
EP4364856A1
EP4364856A1 EP23206360.2A EP23206360A EP4364856A1 EP 4364856 A1 EP4364856 A1 EP 4364856A1 EP 23206360 A EP23206360 A EP 23206360A EP 4364856 A1 EP4364856 A1 EP 4364856A1
Authority
EP
European Patent Office
Prior art keywords
hopper
cleaning unit
head
afore
mentioned
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.)
Pending
Application number
EP23206360.2A
Other languages
German (de)
English (en)
Inventor
Ivano GIGLIOLI
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.)
Air Power Group Srl
Original Assignee
Air Power Group 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 Air Power Group Srl filed Critical Air Power Group Srl
Publication of EP4364856A1 publication Critical patent/EP4364856A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/005—Curtain coaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B05B15/555—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids discharged by cleaning nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/70—Arrangements for moving spray heads automatically to or from the working position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • B05C5/0262—Coating heads with slot-shaped outlet adjustable in width, i.e. having lips movable relative to each other in order to modify the slot width, e.g. to close it

Definitions

  • the present invention relates to the technical field concerning machinery used in the ceramic industry for decorating ceramic tiles or slabs.
  • thermoforming heads there are machineries which apply a uniform layer of liquid glaze on the entire, or on a part of facade of the afore-mentioned ceramic tiles or slabs, the afore-mentioned machineries being also known to those skilled in the art as glazing heads.
  • a glazing head is essentially composed of a hopper fed with the liquid glaze, preferably of the so-called 'in solution' type.
  • the hopper has a calibrated outlet slot, from which a curtain of the afore-mentioned liquid glaze comes out and settles on the ceramic tiles or slabs passing below, arranged in orderly succession and pushed forward with constant speed on a rectilinear transport line.
  • the hopper like other parts through which the glaze passes, must be thoroughly cleaned every time the colour of the glaze is to be changed, as a matter of course, but also at regular intervals, even if the colour of the glaze remains the same, in order to remove any lumps or encrustations that may be formed and that could alter the quality of the layer of applied glaze.
  • the hopper is cleaned by washing with liquid (water with detergent added if necessary) sprayed under pressure from one or more nozzles.
  • liquid water with detergent added if necessary
  • the hopper must be made up of two parts, so that it can be opened during the washing phase, to allow the introduction and handling of the afore-mentioned nozzles inside it and to facilitate the evacuation of the washing liquid from the lower part of the same hopper.
  • a technical solution patented by the industrial invention patent application No. 102021000011846 , filed by the same Applicant, describes a device which allows opening the hopper of a curtain coating head, made up of two parts for this purpose, a first fixed part and a second movable part, the latter being connected to motorised operating means aimed at moving it in a rectilinear horizontal direction.
  • an operating position of the afore-mentioned hopper is defined.
  • an open position of the hopper is configured, which allows the hopper to be washed with cleaning fluid under pressure.
  • the afore-mentioned application also describes lifting means, connected to the glazing head to move it vertically between two extreme positions, respectively, a lowered working position, in which the calibrated outlet slot is located close to the ceramic tiles passing below, and a raised washing position, in which the glazing head is placed at a suitably higher level.
  • a generic cleaning unit that can be positioned below the curtain coating head, placed in the raised position and with the hopper open, to spray cleaning liquid: in this case, what is meant is a device, which is separated from the production line, put in place, activated and subsequently removed by an operator.
  • the reference prior art does not propose solutions in which a glazing head can be washed by a cleaning unit originally arranged and integrated in the production line, of which the glazing head itself is a part.
  • Another object of the invention is to provide a washing apparatus shaped in such a way as to be particularly suitable for a curtain coating head, such as the one described in the above patent application of the same Applicant.
  • a further object of the invention is to provide a washing apparatus having compact dimensions and which, when not in use, does not impair in any way the performance of the glazing head and/or, more generally, the performance of the production line to which it is connected.
  • the proposed washing apparatus can be operated in a fully automatic manner, while the production line is stopped and with the necessary preliminary operations to be carried out in the hopper prior to its washing.
  • Yet another object of the invention is to propose a washing apparatus obtained with simple constructive solutions and therefore reliable over time.
  • an apparatus for washing a curtain coating head with the latter being placed above a rectilinear conveying line, on which tiles or ceramic slabs are advancing, and aimed at uniformly covering a part or the entire upper surface of the tiles or ceramic slabs with liquid ceramic glaze
  • the afore-mentioned glazing head comprising: a hopper consisting of two parts, a first part and a second part, movable with respect to each other; operating means, aimed at configuring an operating position of the hopper, in which the afore-mentioned first part and second part are suitably brought close to each other to define a calibrated outlet slot for the afore-mentioned liquid ceramic glaze, as well as aimed at setting the hopper in open position, in which the first part and second part are moved away from each other.
  • the above-mentioned apparatus includes:
  • the reference number 1 indicates the apparatus for washing a glazing head proposed by the present invention, as a whole.
  • the apparatus 1 is integrated in a module M comprising a glazing head 2, situated above a rectilinear conveying line 3, on which tiles or ceramic slabs (not illustrated) arranged in orderly succession advance with constant speed.
  • the aforesaid module M as illustrated in particular in Figs. 1 and 2 , is provided with an external cover casing C, substantially box-shaped and formed by a plurality of panels, removable for maintenance, so as to constitute a safety protection for the workers during the operation of both the glazing head 2 and the apparatus 1.
  • the glazing head 2 considered in the illustrated example is preferably of the type produced by the same Applicant and subject of a previous patent application, referred to in the introduction, and essentially including a hopper 20, having in its lower part a calibrated outlet slot 21, from which a curtain of liquid ceramic glaze exits to uniformly cover a part or, more often, the entire upper surface of the ceramic tiles or slabs.
  • the hopper 20 consists of two parts, namely a first fixed part 20F and a second movable part 20M; operating means 10 are connected to the second movable part 20M and are aimed at setting the afore-mentioned hopper 20 in an operating position W, in which the fixed part 20F and the movable part 20M are suitably brought close to each other to define the above-mentioned calibrated outlet slot 21 for releasing the liquid ceramic glaze ( Figs. 3 and 4 ), and aimed also at configuring an open position A of the hopper 20, in which the second movable part 20M is moved away from the first fixed part 20F ( Figs. 5 and 6 ).
  • the washing apparatus 1 in the preferred embodiment shown in the figures, comprises lifting means 11, connected to the afore-mentioned glazing head 2 and aimed at moving vertically the same between at least two characteristic positions, respectively a lowered working position B ( Figs. 3 and 4 ), in which the calibrated outlet slot 21 is located at a predetermined height from the ceramic tiles or slabs passing below (not illustrated) and a raised maintenance position H ( Figs. 5 and 6 ), in which the same glazing head 2 is located at a height suitably raised from the afore-mentioned transport line 3.
  • lifting means 11 connected to the afore-mentioned glazing head 2 and aimed at moving vertically the same between at least two characteristic positions, respectively a lowered working position B ( Figs. 3 and 4 ), in which the calibrated outlet slot 21 is located at a predetermined height from the ceramic tiles or slabs passing below (not illustrated) and a raised maintenance position H ( Figs. 5 and 6 ), in which the same glazing head 2 is located at a
  • the afore-mentioned lifting means 11 comprise two linear actuators 110 with a recirculating ball screw, driven synchronously by common motor means, through transmission means, or by respective electric motors, for example, brush-less or stepper motor, mechanically separated but synchronised and electronically controlled according to known techniques (motors not illustrated).
  • the lifting means 11 can be provided with actuators and/or motor means of other types, for example, pneumatic, toothed belt systems and whatever else is available and considered suitable in the commercial actuating components.
  • the apparatus 1 further comprises a cleaning unit 12, situated transversally to the afore-mentioned rectilinear transport line 3 and parallel to the transverse extension of the glazing head 2.
  • Spraying means 120 provided in the cleaning group 12, dispense detergent fluid under pressure, supplied by a respective, non-illustrated supply system, to wash the interior of the afore-mentioned hopper 20, when it is in its the afore-mentioned open position A, as further described below.
  • Moving means 13, connected to said cleaning unit 12, are provided for moving the latter in a longitudinal direction with respect to the afore-mentioned straight conveying line 3, between a rest position N, in which the cleaning unit 12 is withdrawn and spaced from the said glazing head 2 ( Figs. 3 and 4 ), so as to allow the latter to be placed in its lowered working position B, and a washing position L, in which the afore-mentioned cleaning unit 12 is moved forward and positioned below the afore-mentioned glazing head 2 ( Figs. 5 and 6 ), previously placed in the afore-mentioned raised maintenance position H, and with the said hopper 20 configured in its open position A.
  • the afore-mentioned spraying means 120 are substantially centred with respect to the hopper 20, so that the detergent liquid ejected thereby hits and washes the internal walls of the hopper.
  • the afore-mentioned spraying means 120 comprise an omnidirectional multiple jet head, mounted on a slide 121 engaged with a linear guide 122 having sufficient extension to allow the head 120 to move over the entire internal width of the afore-mentioned hopper 20, in a transversal direction with respect to the afore-mentioned straight conveying line 3.
  • actuating means 123 consisting of, for example, a stem-less pneumatic cylinder.
  • afore-mentioned spraying means 120 of the cleaning unit 12 comprising an elongated tubular element (not illustrated as intuitively comprehensible), extending over almost the entire inner width of the afore-mentioned hopper 20, in a transverse direction with respect to the straight transport line 3, and closed at one end.
  • the detergent liquid is fed under pressure into the afore-mentioned tubular element and exits through a plurality of nozzles distributed along the latter, which are variously positioned and oriented.
  • the above-mentioned moving means 13 are of motorised type (see in particular Figs. 7 and 9 ) and comprise:
  • the afore-mentioned moving means 13 are of manual type and comprise at least one gripping handle, connected to the cleaning unit 12, for example with one of the afore-mentioned wheeled carriages 130, for making the afore-mentioned cleaning unit 12 move between the respective rest position N and washing position L.
  • the cleaning unit 12 is advantageously provided with lateral splash guards 124, for example four, arranged in a rectangle (see in particular Fig. 7 ), suitable for encircling the area around the lower part of the afore-mentioned hopper 20, during the active phases of the afore-mentioned spraying means 120, limiting the splashes of cleaning liquid.
  • the height distance between the spraying means and the inner walls of the hopper 20 is advantageously reduced as much as possible.
  • the lifting means 11, connected to the glazing head 2 are suitable for defining, for the latter, an additional raised introduction position (not illustrated), at a higher level than the afore-mentioned raised maintenance position H.
  • This raised position is selected in phase relation with the afore-mentioned movement of the cleaning unit 12 between the respective rest position N and washing position L, and vice versa, in order to avoid collisions between the afore-mentioned spraying means 120 and the afore-mentioned hopper 20, and also between the latter and the afore-mentioned lateral side splash guards 124.
  • This expedient allows an adjustment of the level of the said raised maintenance position H of the hopper 20 (i.e., of the glazing head 2), so that, when centred with respect to the hopper 20, the spraying means 120 are also partially introduced therein (see in particular Fig. 6 ).
  • lateral side splash guards 124 is optimised.
  • the cleaning unit 12 can be provided with means (not illustrated) for moving vertically the afore-mentioned spraying means 120 from a lowered rest position to a raised position, in which they are partially introduced into the afore-mentioned hopper 20.
  • the washing apparatus 1 comprises a collection tank 14, underlying the afore-mentioned glazing head 2 and the afore-mentioned cleaning unit 12, aimed at receiving, by gravity, the detergent liquid used in the washing phase of the afore-mentioned hopper 20 and the particles of dirt removed from the afore-mentioned hopper 20 ( Figs. 8 and 9 ).
  • the waste liquid flowing into the collection tank 14 is then evacuated through a duct 15 in order to be duly treated.
  • the operation of the apparatus 1 is managed in accordance with the operation of the glazing head 2 by means of the usual electronic systems, such as processing units, PLCs and suitable software, commonly used in automation; such components, not illustrated nor described in detail since they are not relevant for the purposes of the invention, can be integrated in the module M or external to it and be part of a more complex management system that governs the management of the whole production line.
  • electronic systems such as processing units, PLCs and suitable software, commonly used in automation
  • the apparatus 1 is inactive during the normal operation of the glazing head 2, therefore:
  • the preferred described embodiment of the proposed washing apparatus is particularly suitable for the glazing head produced by the Applicant, however it is evident that it can easily be used, with necessary adjustments but with a similar construction design, also for different curtain coating heads, provided that they can be opened, with the simple application of the afore-mentioned lifting means.
  • the proposed washing apparatus is compact and, when not in operation, it does not affect the functions of the glazing head and/or the associated production line in any way.
  • the module that incorporates both the apparatus and the glazing head makes it possible to best prepare what is necessary to implement a fully automatic operation of the washing cycles, in phase relation with the shutdown of the production line and with the preliminary operations of the hopper, without the intervention of operators and also with remote control, laying the foundations for compliance with the requirements of the recent legislation known as Industry 4.0.
  • the washing apparatus is realised with simple construction solutions, extensively tested as for automation, guaranteeing correct, constant and reliable operation over time.

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  • Cleaning By Liquid Or Steam (AREA)
EP23206360.2A 2022-11-02 2023-10-27 Appareil pour lavage d'une tête de revêtement par fentes Pending EP4364856A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202200022449 2022-11-02

Publications (1)

Publication Number Publication Date
EP4364856A1 true EP4364856A1 (fr) 2024-05-08

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ID=84943347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23206360.2A Pending EP4364856A1 (fr) 2022-11-02 2023-10-27 Appareil pour lavage d'une tête de revêtement par fentes

Country Status (1)

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EP (1) EP4364856A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040213913A1 (en) * 2003-04-23 2004-10-28 Sung-Ki Jung Cleaning unit, slit coating apparatus having the same and method of coating substrate
ITMO20060009A1 (it) * 2006-01-13 2007-07-14 Paolo Sighinolfi Apparato decoratore
US20160107184A1 (en) * 2013-06-28 2016-04-21 Shenzhen China Star Optoelectronics Technology Co., Ltd. Slit nozzle cleaning device
IT201900010464A1 (it) * 2019-06-28 2020-12-28 Projecta Eng S R L Macchina e metodo per la decorazione di prodotti con materiali granulari

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040213913A1 (en) * 2003-04-23 2004-10-28 Sung-Ki Jung Cleaning unit, slit coating apparatus having the same and method of coating substrate
ITMO20060009A1 (it) * 2006-01-13 2007-07-14 Paolo Sighinolfi Apparato decoratore
US20160107184A1 (en) * 2013-06-28 2016-04-21 Shenzhen China Star Optoelectronics Technology Co., Ltd. Slit nozzle cleaning device
IT201900010464A1 (it) * 2019-06-28 2020-12-28 Projecta Eng S R L Macchina e metodo per la decorazione di prodotti con materiali granulari

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