EP1127667B1 - A glazing machine for ceramic tiles - Google Patents
A glazing machine for ceramic tiles Download PDFInfo
- Publication number
- EP1127667B1 EP1127667B1 EP01830026A EP01830026A EP1127667B1 EP 1127667 B1 EP1127667 B1 EP 1127667B1 EP 01830026 A EP01830026 A EP 01830026A EP 01830026 A EP01830026 A EP 01830026A EP 1127667 B1 EP1127667 B1 EP 1127667B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glaze
- conveyor
- tiles
- tile
- outlet
- 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.)
- Expired - Lifetime
Links
Images
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
- B28B11/04—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
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
-
- 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
- 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
- B28B11/044—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers with glaze or engobe or enamel or varnish
-
- 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
- B28B11/049—Recycling of the coating material
-
- 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
Definitions
- a glaze supply circuit central control unit 11 is predisposed to receive the delivery signals supplied by the measuring device 10 and in turn supplies a control signal to a pump 9 activating motor 12.
- the central control unit 11 is predisposed to compare the delivery signals (mass and density) supplied by the measuring device 10 with the preset delivery values (mass and density) so as to be able to maintain constant the delivery (in terms of mass) to the glaze supply circuit.
- the central control unit 11 is predisposed to set and maintain the conveyor motors and the pump motor 12 in a predetermined relationship.
- a remote personal computer 17 could be used for contemporaneously overseeing the control units of a plurality of glazing machines operating in sequence along a single glazing line.
- the central unit 11 is able to maintain the conveyor plane advancement speed and the delivery in terms of mass of the glaze in the supply circuit in a reciprocal relationship. If, for whatever reason (for example, an operator error, or a change in glaze viscosity or density, or wear in the conveyor plane or supply pump, etc.) one of the above-mentioned parameters undergoes a sudden change, the central unit 11 automatically corrects the other parameter so as to keep the quantity of glaze distributed on each single tile 3 constant. This allows improvement in the quality of the production, and also enables manual control by an operator of the thickness of the glaze to be avoided.
Abstract
Description
- The invention relates to a glazing machine for ceramic tiles.
- Specifically, though not exclusively, the invention is usefully applied in laying a continuous and uniform coating of glaze over all of the upper surface of ceramic tiles.
- Particular reference is made to a glazing machine made according to the preamble of claim 1.
- Italian patent, ITMO 980142, in the present applicant's name, teaches a glazing machine of the above-indicated type, in which the tiles advance along a chain-link conveyor. One of the problems in known glazing machines is that the conveyor links are fouled by glaze as they pass through the glaze distribution zone, with a consequent waste of glaze and malfunctioning of the conveyor plane.
- A further problem is caused by the need to guarantee that the quantity of glaze apportioned to each tile is uniform and constant.
- US-A-4 249 478 discloses a machine for coating work pieces with a curtain of liguified material and deals with means for automatically controlling the thickness of the coating layer applied to the upper surface of the work piece as it passes through a curtain created by conventional means including a positive displacement pump in conjunction whith any elongated defining a cross sectional area such that the volume rate of flow of the coating material is directly related to the speed of the pump motor. The work pieces are generally flat and are conveyed by a conveyor.
- The apparatus defined in claim 1 solves the above-mentioned problems in the prior art.
- An advantage of the invention is that it reduces fouling of the conveyor plane.
- A further advantage is that the quantity of glaze distributed on the tiles is kept under control even if some machine operation parameters are changed, such as for example tile advance speed, glaze delivery rate, especially glaze mass delivery rate, viscosity of the glaze, glaze density, and so on.
- These aims and advantages and more besides are all attained by the present invention, as it is characterised in the appended claims.
- Further characteristics and advantages of the invention will better emerge from the detailed description that follows of a preferred but non-exclusive embodiment of the invention, illustrated purely by way of a non-limiting example in the accompanying figures of the drawings, in which:
- figure 1 is a diagram of a glazing machine made according to the invention.
-
- With reference to the above-mentioned figure, 1 denotes in its entirety a glazing machine for ceramic tiles, which can distribute a continuous and uniform layer of glaze on the upper surface of the tiles.
- The machine 1 comprises a horizontal conveyor plane 2, along which the tiles 3 advance in an orderly fashion, one after another in an advancement direction F.
- At least one device 4 for distributing glaze on the transiting tiles is predisposed above the conveyor plane 2. This device 4 comprises a sealed distribution chamber having an
inlet 5 connected with a glaze supply and anoutlet 6 for the glaze. Theoutlet 6 is conformed in such a way that the glaze can exit in the form of a thin veil 7, a continuous vertical rain which deposits on the upper surface of the underlying tiles 3 as they pass on the conveyor plane 2. Theoutlet 6 is a thin fissure, straight and extending along a transversal direction to direction F, in which the tiles 3 are advancing. The length of the longitudinal glaze outlet fissure is not shorter than the transversal dimension of the tiles 3. The width of the glaze outlet fissure is adjustable, so that the width of the veil 7 of glaze falling on the tiles can be regulated. - The conveyor plane 2 comprises a
first conveyor 2a supplying the tiles 3 and asecond conveyor 2b for extracting the tiles 3; thefirst conveyor 2a is upstream of the glaze distribution zone, while thesecond conveyor 2b is downstream thereof. Bothconveyors - The
first conveyor 2a has a tile drop end which is situated at a predetermined distance, measured in advancement direction F, from the vertical of theoutlet 6 of the glaze distribution chamber. - The
second conveyor 2b has a tile collection end which predisposed to receive the tiles 3 from the tile drop end of thefirst conveyor 2a, which is situated at a predetermined distance, measured according to the advance direction F, from the vertical of the outlet of the glaze distribution chamber. Between the tile drop end of thefirst conveyor 2a and the tile collection end of thesecond conveyor 2b there is an empty space, which is crossed by the vertical of the glazedistribution chamber outlet 6. Basically, the twoconveyors - The conveyor plane 2 is actuated by a means comprising at least one
motor 8a which drives thefirst conveyor 2a and amotor 8b driving thesecond conveyor 2b. - The means for supplying glaze are predisposed for pressure-feeding the glaze to the sealed glaze distribution chamber. The means for supplying glaze comprise at least one hydraulic supply circuit terminating in the glaze distribution chamber under pressure; at least one pump 9, preferably of the positive-displacement type, operates along the glaze supply circuit.
- The pump 9 is equipped with means for controlling and regulating the batched supply of glaze to the distribution chamber, which means preferably comprise a glaze delivery measuring
device 10 in the supply circuit and which supply one or more signals which can be used to control the pump 9. - The glaze
delivery measuring device 10 is advantageously constituted by a mass delivery gauge which also measures the density of the supplied product. - A glaze supply circuit central control unit 11 is predisposed to receive the delivery signals supplied by the
measuring device 10 and in turn supplies a control signal to a pump 9 activatingmotor 12. The central control unit 11 is predisposed to compare the delivery signals (mass and density) supplied by themeasuring device 10 with the preset delivery values (mass and density) so as to be able to maintain constant the delivery (in terms of mass) to the glaze supply circuit. - A
gauge 13 is predisposed on the glaze supply circuit to control pump 9 delivery pressure. - The central control unit 11 is predisposed to set and maintain the conveyor motors and the
pump motor 12 in a predetermined relationship. - Both the
pump motor 12 and thebelt drive motors belts - The glazing machine is also provided with means for excess glaze collection, which convey excess glaze (glaze which has outletted from the distribution chamber but which has not coated a tile) to a
collection tank 14 connected to the supply circuit. The means for excess glaze collection comprise asmall tank 15 predisposed below the conveyor plane 2 (and in particular below the glaze distribution zone and below the space where the twobelts device 16 for filtering the glaze which is located upstream of thecollection tank 14. - A remote
personal computer 17 could be used for contemporaneously overseeing the control units of a plurality of glazing machines operating in sequence along a single glazing line. - During operation, the tiles are supplied at a predetermined constant speed into the glazing zone located below the distributing device. The glaze is supplied under pressure to the distribution chamber and from there descends in a continuous and uniform veil onto the underlying transiting tiles, leaving a regular and continuous coating of glaze thereon.
- In the zone where the glaze drips down, corresponding in effect to the vertical projection of the
lower outlet 6 of the pressurised chamber of the distributing device 4, there is an interruption in the conveyor plane 2, so that the plane 2 itself is not fouled by the glaze. The part of glaze distributed but not deposited on the tiles is recuperated, and waste is therefore reduced to a minimum. - As mentioned previously, the central unit 11 is able to maintain the conveyor plane advancement speed and the delivery in terms of mass of the glaze in the supply circuit in a reciprocal relationship. If, for whatever reason (for example, an operator error, or a change in glaze viscosity or density, or wear in the conveyor plane or supply pump, etc.) one of the above-mentioned parameters undergoes a sudden change, the central unit 11 automatically corrects the other parameter so as to keep the quantity of glaze distributed on each single tile 3 constant. This allows improvement in the quality of the production, and also enables manual control by an operator of the thickness of the glaze to be avoided.
Claims (2)
- A glazing machine for ceramic tiles, comprising:a horizontal conveyor plane (2), powered by motors (8a) and (8b), along which tiles (3) advance one after another in an advancement direction (F);at least one glaze distributing device (4), predisposed above the conveyor plane (2), for distributing glaze on the transiting tiles (3), the al least one glaze distributing device (4) comprising a sealed distribution chamber having an inlet (5) and on outlet (6) for the glaze, the outlet (6) being straight, narrow and elongate in a transversal direction to an advancement direction (F) of the tiles (3);means for supplying glaze under pressure to the inlet (5) of the distribution chamber, which means for supplying comprise a glaze supply circuit alon which a pump (9) operates, which pump (9) is actuated by a motor (12);the glaze exiting from the outlet (6) in a vertically-directed veil and depositing on upper surfaces of the tiles (3) transiting on the conveyor plane (2);the conveyor plane (2) comprises a first conveyor (2a) for supplying the tiles and a second conveyor (2b) for receiving the tiles (3), the first conveyor (2a) being located upstream of a glaze distribution zone and the second conveyor (2b) being located downstream of the glaze distribution zone;the first conveyor (2a) has a tile drop end situated at a predetermined distance, measured in the tile advancement direction (F), from a vertical projection originating from the outlet (6) of the glaze distribution chamber;the second conveyor (2b) has a tile collection end, predisposed to receive the tiles (3) from the first conveyor (2a) drop end, situated at a predetermined distance, measured in the tile advancement direction (F), from a vertical projection originating from the outlet (6) of the glaze distribution chamber;between the tile drop end of the first conveyor (2a) and the tile collection end of the second conveyor (2b) there being a space which is crossed by the vertical projection originating at the outlet (6) of the glaze distribution chamber;a central control unit (11) being provided for setting the motors (8a, 8b) of the conveyor plane (2) in a fixed relationship with the motors (12), of the pump (9) of the supply circuit, characterized, in that said central control unit (11) being connected to a glaze mass delivery measuring device (10) operating in the supply circuit, the central control unit (11) being predisposed to compare a mass delivery signal provided by the delivery megsuring device (10) with a preset mass delivery value so as to maintain mass delivery in the supply circuit at a constant level.
- The glazing machine of claim 1, characterised in that below the conveyor plane (2), between the drop end of the first conveyor (2a) and the collection end of the second conveyor (2b), means for collecting are arranged which collect excess glaze which is not deposited on the tiles (3).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2000MO000028A IT1315600B1 (en) | 2000-02-25 | 2000-02-25 | GLAZING MACHINE FOR CERAMIC TILES |
ITMO200028 | 2000-02-25 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1127667A2 EP1127667A2 (en) | 2001-08-29 |
EP1127667A3 EP1127667A3 (en) | 2003-04-23 |
EP1127667B1 true EP1127667B1 (en) | 2005-09-28 |
Family
ID=11450366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01830026A Expired - Lifetime EP1127667B1 (en) | 2000-02-25 | 2001-01-19 | A glazing machine for ceramic tiles |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1127667B1 (en) |
AT (1) | ATE305377T1 (en) |
DE (1) | DE60113576D1 (en) |
ES (1) | ES2246305T3 (en) |
ID (1) | ID29378A (en) |
IT (1) | IT1315600B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110732423A (en) * | 2019-10-31 | 2020-01-31 | 重庆市佳禾家具制造有限公司 | spray coating device |
CN110732473A (en) * | 2019-10-31 | 2020-01-31 | 重庆市佳禾家具制造有限公司 | spray coating process for boards |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2343500B1 (en) * | 2008-02-26 | 2011-06-09 | Euroelettra Ingenieria, S.L. | AUTOMATIC SYSTEM FOR THE MANAGEMENT OF THE QUANTITY, DENSITY AND VISCOSITY OF THE PRODUCTS APPLIED IN THE CERAMIC TILE ESMALTATION PHASE. |
CN109676768B (en) * | 2019-02-28 | 2023-09-12 | 佛山市东鹏陶瓷有限公司 | Material distribution system |
IT201900024895A1 (en) * | 2019-12-19 | 2021-06-19 | Paolo Sighinolfi | A METHOD AND A PLANT FOR THE WEIGHT DISTRIBUTION OF GLAZES ON SURFACES OF PRODUCTS |
IT202100008606A1 (en) * | 2021-04-07 | 2022-10-07 | Alfa Impianti Srl | DEVICE FOR GLAZING MANUFACTURED PRODUCTS AND RELATED PLANT |
CN114434598A (en) * | 2022-03-09 | 2022-05-06 | 上海守奇建筑科技有限公司 | Ceramic bathroom grouting forming process and intelligent equipment |
CN114789108A (en) * | 2022-04-02 | 2022-07-26 | 苏州镓祥新材料科技有限公司 | Priming paint curtain coating device for metal plates |
WO2024023777A1 (en) * | 2022-07-29 | 2024-02-01 | Tecno Italia Digital S.R.L. | Piece of equipment for the decoration of ceramic artifacts |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB853616A (en) * | 1957-01-11 | 1960-11-09 | Robert Buerkle | Lacquer-depositing apparatus |
DE1182559B (en) * | 1958-04-23 | 1964-11-26 | Robert Buerkle & Co Maschinenf | Paint casting machine |
DE1257642C2 (en) * | 1964-08-14 | 1975-02-06 | CASTING HEAD ON LIQUID CASTING MACHINES FOR LOW-VISCOSE LIQUIDS WITH A FREE-FALLING FLOW CURTAIN | |
US4249478A (en) * | 1979-03-23 | 1981-02-10 | Rolf Gruener | Controller for curtain coater |
DE3320160C2 (en) * | 1983-06-03 | 1986-07-03 | IBS, Engineering + Consulting Ingenieurbüro Schröder GmbH, 5410 Höhr-Grenzhausen | Device for coating ceramic plates, preferably for applying a layer of glaze |
DE3925016A1 (en) * | 1989-07-28 | 1991-01-31 | T E M A C S R L | Liq. glaze application control - e.g. during glazing of ceramic tiles |
JPH09103727A (en) * | 1995-10-13 | 1997-04-22 | Misuzu:Kk | Temperature controller for flow coater |
-
2000
- 2000-02-25 IT IT2000MO000028A patent/IT1315600B1/en active
-
2001
- 2001-01-19 EP EP01830026A patent/EP1127667B1/en not_active Expired - Lifetime
- 2001-01-19 DE DE60113576T patent/DE60113576D1/en not_active Expired - Lifetime
- 2001-01-19 AT AT01830026T patent/ATE305377T1/en not_active IP Right Cessation
- 2001-01-19 ES ES01830026T patent/ES2246305T3/en not_active Expired - Lifetime
- 2001-01-25 ID IDP20010090D patent/ID29378A/en unknown
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110732423A (en) * | 2019-10-31 | 2020-01-31 | 重庆市佳禾家具制造有限公司 | spray coating device |
CN110732473A (en) * | 2019-10-31 | 2020-01-31 | 重庆市佳禾家具制造有限公司 | spray coating process for boards |
CN110732423B (en) * | 2019-10-31 | 2021-07-20 | 重庆市佳禾家具制造有限公司 | Curtain coating device |
CN110732473B (en) * | 2019-10-31 | 2021-12-21 | 重庆市佳禾家具制造有限公司 | Door plate curtain coating process |
Also Published As
Publication number | Publication date |
---|---|
EP1127667A3 (en) | 2003-04-23 |
ID29378A (en) | 2001-08-30 |
ITMO20000028A1 (en) | 2001-08-25 |
DE60113576D1 (en) | 2006-02-09 |
IT1315600B1 (en) | 2003-03-14 |
ES2246305T3 (en) | 2006-02-16 |
ATE305377T1 (en) | 2005-10-15 |
EP1127667A2 (en) | 2001-08-29 |
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