WO2002072284A2 - Method and machine for painting metal lids - Google Patents
Method and machine for painting metal lids Download PDFInfo
- Publication number
- WO2002072284A2 WO2002072284A2 PCT/IT2002/000148 IT0200148W WO02072284A2 WO 2002072284 A2 WO2002072284 A2 WO 2002072284A2 IT 0200148 W IT0200148 W IT 0200148W WO 02072284 A2 WO02072284 A2 WO 02072284A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- painting
- lid
- lids
- machine
- pulleys
- Prior art date
Links
- 238000010422 painting Methods 0.000 title claims abstract description 38
- 239000002184 metal Substances 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007592 spray painting technique Methods 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims 1
- 239000003973 paint Substances 0.000 description 9
- 101100493712 Caenorhabditis elegans bath-42 gene Proteins 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/06—Suspending or supporting devices for articles to be coated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/16—Apparatus for electrolytic coating of small objects in bulk
- C25D17/28—Apparatus for electrolytic coating of small objects in bulk with means for moving the objects individually through the apparatus during treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/007—Processes for applying liquids or other fluent materials using an electrostatic field
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
Definitions
- Lids of the above type are normally produced by- combined blanking/drawing of flat painted metal sheets, so that each lid is substantially circular and comprises a central portion, and an outer annular edge which is normally folded substantially into a U to hook the lid on to the can.
- the central portion and the outer annular edge are connected to each other by a grooved pull-off line, and the lid is provided with a pull-off tab fixed to the central portion by a riveted joint and which, when pulled, detaches the central portion relatively easily from the outer annular edge .
- lids are normally repainted using one of two methods: spray painting and electropainting .
- Spray painting has several drawbacks, foremost of which is that it fails to provide for fully and effectively repainting the exposed parts of the lid that are hard to reach, i.e. the U-folded outer annular edge, the riveted joint, and certain portions of the pull-off tab. While ensuring all the exposed parts of the lid are repainted, electropainting is relatively ineffective in the event the surfaces of the lid are not thoroughly clean.
- electropainting since, after blanking/drawing, the layer of paint on the more severely drawn areas of the lid may undergo cracking which does not reach the base metal of the lid, electropainting also has the further drawback of failing to repaint the areas corresponding to such cracks, so that, when drying and/or sterilizing to stabilize the lid, the cracks may widen to the extent of forming respective exposed areas .
- a method of painting metal lids characterized by comprising a first painting step in which said lids are spray painted; a first drying step to stabilize the spray-painted lids; and a second painting step in which said lids are electropainted.
- the present invention also relates to a machine for painting metal lids .
- a machine for painting metal lids comprising conveying means for feeding said lids successively along a given path; and characterized by also comprising first painting means for spray painting said lids; first drying means for stabilizing the lids painted by said first painting means; and second painting means for electropainting said lids.
- Figure 1 shows a schematic side view, with parts removed for clarity, of a preferred embodiment of the machine for painting metal lids according to the present invention
- Figure 2 shows a schematic view in perspective, with parts removed for clarity, of a first detail of the Figure 1 machine
- Figure 3 shows a first schematic side view, with parts removed for clarity, of a second detail in Figure
- Figure 4 shows a larger-scale second schematic side view, with parts removed for clarity, of the Figure 3 detail;
- Figure 6 shows a second plan view of the Figure 5 lid.
- Number 1 in Figure 1 indicates as a whole a machine for painting metal lids 2 (Figures 5 and 6) , each of which is substantially circular, and comprises a substantially flat central portion 3 defined axially by two parallel faces 3a, and an outer annular edge 4 which extends about portion 3, is connected to portion 3 by a grooved pull-off line 5, and has a substantially U-shaped fold 4a by which to hook lid 2 on to a respective can (not shown) .
- Each lid 2 also comprises a pull-off tab 6 by which to open the can (not shown) easily, and which is fixed to portion 3 by a riveted joint 7.
- Machine 1 comprises three conveyor devices 8, 9 and 10 arranged in series to feed lids 2 along a given path P and in a given direction 11; and two transfer stations 12, 13 connecting device 9 to device 8 and device 10 respectively.
- Each conveyor 16, 17, 18 comprises a number of push members 22 equally spaced along relative conveyor 16, 17, 18 and defining a succession of pockets 23, each of a length at least equal to the diameter of a lid 2.
- Conveyors 16, 17 and 18 are operated to feed each pocket 23 on conveyor 17 forward in time with a corresponding pocket 23 on each of conveyors 16 and 18, and so feed lids 2 successively along portion PI and along two supporting rails 24 ( Figure 2) , which extend • between stations 14 and 12, are parallel to each other and to portion PI, are mounted on opposite sides of conveyors 16, 17 and 18, and are separated by a distance approximately equal to but no larger than the diameter of a lid 2, so that rails 24 support each lid 2 by respective edge 4.
- Machine 1 also comprises a painting device 25 located along portion PI and in turn comprising two known spray nozzles 26, one mounted beneath rails 24, at conveyor 17, to paint the downward-facing faces 3a, and the other mounted over rails 24, at conveyor 18, to paint the upward-facing faces 3a.
- a painting device 25 located along portion PI and in turn comprising two known spray nozzles 26, one mounted beneath rails 24, at conveyor 17, to paint the downward-facing faces 3a, and the other mounted over rails 24, at conveyor 18, to paint the upward-facing faces 3a.
- device 9 comprises two chain conveyors 27, which move in respective vertical, substantially parallel planes, are positioned facing each other, and feed lids 2 successively along an intermediate portion P2 of path P extending between stations 12 and 13.
- Each conveyor 27 is looped about a number of pulleys 28 fitted to frame 20, each coaxial with a corresponding pulley 28 of the other conveyor 27, and rotated continuously, with respect to frame 20 and by an actuating device 29 described in detail later on, about respective axes 30 substantially parallel to axes 21.
- Each conveyor 27 also comprises a number of supporting members 31 attached in known manner to conveyor 27, and each having two longitudinal grooves 32 extending crosswise to direction 11.
- Each groove 32 faces • a corresponding groove 32 on the other conveyor 27, and is separated from the corresponding groove 32 by a distance substantially equal to the diameter of a lid 2, so as to define a pocket 33 for receiving and retaining a respective lid 2, and which is advanced in time with a relative pocket 23 on conveyor 18.
- conveyor 18 extends between the two conveyors 27 to enable each push member 22 to feed respective lid 2 into a respective pocket 33.
- portion P2 comprises nonvertical portions where the two conveyors 27 cooperate with fixed guides 34 for supporting lids 2 underneath.
- Machine 1 also comprises a drying device 35 located along portion P2 , downstream from station 12 in direction 11, and in turn comprising a number of (in the example shown, four) known infrared-ray plates 36 located successively along portion P2 to stabilize the paint applied to lids 2 by device 25; and a cooling device 37 defined by a known cold-air diffuser 38 downstream from device 35 in direction 11.
- lids 2 are fed successively through a painting station 39 where they are electropainted by a painting device 40.
- device 40 comprises a tank 41 located beneath two pulleys 28 (hereinafter indicated 28a) and containing an electrophoretic bath 42 defined by a water and paint solution in which a known electrode (not shown) - in the example shown, a cathode - is immersed.
- each lid 2 comes into contact with a relative electrode 43a - in the example shown, an anode - defined by two adjacent turns of a coil spring 43 polarized electrically and looped about a pulley 44 ( Figure 4) , which has a diameter substantially equal to the difference between the diameter of a pulley 28a and the diameter of a lid 2, is fitted to a plate 45, and is rotated, with respect to plate 45 and by actuating device 29, about an axis substantially parallel to axes 30.
- Plate 45 defines a slide fitted to run along two parallel guides 46 fitted to frame 20, and which is movable, manually or by means of a known actuating device (not shown) , between a work position ( Figures 1, 3 and 4) in which pulley 44 extends between and coaxial with the two pulleys 28a, and a rest position (not shown) for servicing or changing spring 43.
- actuating device not shown
- the level of bath 42 in tank 41 is controlled selectively so that, when in the work position, spring 43 is always located outside bath 42.
- Device 29 comprises a known powered transmission 47 - in the example shown, a chain transmission - having a central motor 48, the output shaft 49 of which is connected to an intermediate pulley 50 by a chain 51.
- Pulley 50 is in turn connected to pulleys 28a by two chains 52, and to pulley 44 by a chain 53 looped about a further pulley 54 fitted in rotary manner to plate 45.
- lids 2 are released from respective electrodes 43a and fed to transfer station 13, where they are picked up successively by conveying device 10.
- Device 10 comprises a chain conveyor 55 looped about a number of pulleys (not shown) - one of which is powered continuously - with respective axes (not shown) substantially parallel to axes 30.
- Conveyor 55 comprises a number of push members 56 equally spaced along conveyor 55 and defining a succession of pockets 57, each of which is of a length at least equal to the diameter of a lid 2, and is advanced in time with a pocket 33 of device 9 to receive the lid 2 housed inside pocket 33.
- conveyor 55 extends between the two conveyors 27 to enable each push member 56 to push the relative lid 2 out of relative pocket 33 and into relative pocket 57.
- lids 2 are fed through a known drying device 58 for stabilizing the paint applied to lids 2 at station 39.
- Machine 1 has several advantages, foremost of which is that, by combining the spray painting and electropainting processes, and by interposing drying device 35 between the two painting devices 25 and 40 to completely fracture any cracks in the paint coat on lids 2 before lids 2 are fed through device 40, machine 1 provides for completely and effectively repainting lids 2. Moreover, since each electrode 43a engages respective lid 2 at at least two points on lid 2, and, given the flexible structure of spring 43, the points of contact may vary at each operating cycle of each electrode 43a, machine 1 has the further advantage of operation of electrodes 43a being relatively unaffected by electrical corrosion phenomena.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002247972A AU2002247972A1 (en) | 2001-03-09 | 2002-03-11 | Method and machine for painting metal lids |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2001BO000128A ITBO20010128A1 (en) | 2001-03-09 | 2001-03-09 | METHOD AND MACHINE FOR PAINTING METAL COVERS |
ITBO2001A000128 | 2001-03-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002072284A2 true WO2002072284A2 (en) | 2002-09-19 |
WO2002072284A3 WO2002072284A3 (en) | 2004-03-04 |
Family
ID=11439174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT2002/000148 WO2002072284A2 (en) | 2001-03-09 | 2002-03-11 | Method and machine for painting metal lids |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2002247972A1 (en) |
IT (1) | ITBO20010128A1 (en) |
WO (1) | WO2002072284A2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004103573A1 (en) * | 2003-05-20 | 2004-12-02 | Lasa Impianti S.R.L. | Electrostatic-painting system for metallic manufactured articles and associated method |
WO2008096235A1 (en) * | 2007-02-06 | 2008-08-14 | Corima International S.R.L. | An apparatus for electrophoretic painting of metal objects, in particular lids for containers for food use |
WO2009095152A1 (en) * | 2008-01-29 | 2009-08-06 | Volkswagen Aktiengesellschaft | Treatment system for the surface treatment of items, particularly vehicle bodies |
ITBO20130435A1 (en) * | 2013-08-02 | 2015-02-03 | Corima Internat Machinery S R L | ROTARY UNIT FOR THE TRANSPORT OF CROWN METAL CAPS AND MACHINE FOR THE APPLICATION OF VARNISH BY ELECTROPHORESIS ON CROWN METAL PLUGS |
ITBO20130496A1 (en) * | 2013-09-16 | 2015-03-17 | Corima Internat Machinery S R L | MACHINE FOR APPLICATION OF VARNISH BY ELECTROPHORESIS ON CROWN METAL PLUGS |
CN113399161A (en) * | 2021-06-30 | 2021-09-17 | 江苏兴甬铝业科技有限公司 | Anti-splashing spraying equipment |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3998716A (en) * | 1974-06-03 | 1976-12-21 | Inmont Corporation | Method of applying coatings |
US4731171A (en) * | 1985-05-02 | 1988-03-15 | Schmalbach-Lubeca Ag | Process for making a lid having a tear-away opening |
EP0443616A1 (en) * | 1990-02-23 | 1991-08-28 | Fuji Photo Film Co., Ltd. | Process for forming multilayer coating |
WO1994025645A1 (en) * | 1993-04-30 | 1994-11-10 | Co.Ri.Ma Societa' A Responsabilita' Limitata | High versatility machine for the electrophoretic recoating of tinplate lids |
DE4405170A1 (en) * | 1994-02-18 | 1995-08-24 | Basf Lacke & Farben | Process for the production of lids and / or trays for packaging containers, the lids and bottoms thus produced and their use for the production of packaging containers, in particular for food packaging |
US5895691A (en) * | 1997-01-10 | 1999-04-20 | Eagle-Picher Industries, Inc. | Immersion can coating apparatus and method |
EP0971051A1 (en) * | 1998-07-09 | 2000-01-12 | Giacomo Borra | A machine for the electrophoretic re-painting or re-varnishing of thin metal objects |
-
2001
- 2001-03-09 IT IT2001BO000128A patent/ITBO20010128A1/en unknown
-
2002
- 2002-03-11 AU AU2002247972A patent/AU2002247972A1/en not_active Abandoned
- 2002-03-11 WO PCT/IT2002/000148 patent/WO2002072284A2/en not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3998716A (en) * | 1974-06-03 | 1976-12-21 | Inmont Corporation | Method of applying coatings |
US4731171A (en) * | 1985-05-02 | 1988-03-15 | Schmalbach-Lubeca Ag | Process for making a lid having a tear-away opening |
EP0443616A1 (en) * | 1990-02-23 | 1991-08-28 | Fuji Photo Film Co., Ltd. | Process for forming multilayer coating |
WO1994025645A1 (en) * | 1993-04-30 | 1994-11-10 | Co.Ri.Ma Societa' A Responsabilita' Limitata | High versatility machine for the electrophoretic recoating of tinplate lids |
DE4405170A1 (en) * | 1994-02-18 | 1995-08-24 | Basf Lacke & Farben | Process for the production of lids and / or trays for packaging containers, the lids and bottoms thus produced and their use for the production of packaging containers, in particular for food packaging |
US5895691A (en) * | 1997-01-10 | 1999-04-20 | Eagle-Picher Industries, Inc. | Immersion can coating apparatus and method |
EP0971051A1 (en) * | 1998-07-09 | 2000-01-12 | Giacomo Borra | A machine for the electrophoretic re-painting or re-varnishing of thin metal objects |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004103573A1 (en) * | 2003-05-20 | 2004-12-02 | Lasa Impianti S.R.L. | Electrostatic-painting system for metallic manufactured articles and associated method |
WO2008096235A1 (en) * | 2007-02-06 | 2008-08-14 | Corima International S.R.L. | An apparatus for electrophoretic painting of metal objects, in particular lids for containers for food use |
US8206559B2 (en) | 2007-02-06 | 2012-06-26 | Corima International S.R.L. | Apparatus for electrophoretic painting of metal objects, in particular lids for containers for food use |
WO2009095152A1 (en) * | 2008-01-29 | 2009-08-06 | Volkswagen Aktiengesellschaft | Treatment system for the surface treatment of items, particularly vehicle bodies |
US8469042B2 (en) | 2008-01-29 | 2013-06-25 | Volkswagen Aktiengesellschaft | Treatment system and method for the surface treatment of workpieces, particularly vehicle bodies |
ITBO20130435A1 (en) * | 2013-08-02 | 2015-02-03 | Corima Internat Machinery S R L | ROTARY UNIT FOR THE TRANSPORT OF CROWN METAL CAPS AND MACHINE FOR THE APPLICATION OF VARNISH BY ELECTROPHORESIS ON CROWN METAL PLUGS |
ITBO20130496A1 (en) * | 2013-09-16 | 2015-03-17 | Corima Internat Machinery S R L | MACHINE FOR APPLICATION OF VARNISH BY ELECTROPHORESIS ON CROWN METAL PLUGS |
WO2015036978A1 (en) * | 2013-09-16 | 2015-03-19 | Corima International Machinery S.R.L. | A machine for application of paint by means of electrophoresis on metal crown caps |
CN113399161A (en) * | 2021-06-30 | 2021-09-17 | 江苏兴甬铝业科技有限公司 | Anti-splashing spraying equipment |
CN113399161B (en) * | 2021-06-30 | 2023-02-21 | 江苏兴甬铝业科技有限公司 | Anti-splashing spraying equipment |
Also Published As
Publication number | Publication date |
---|---|
AU2002247972A1 (en) | 2002-09-24 |
ITBO20010128A1 (en) | 2002-09-09 |
ITBO20010128A0 (en) | 2001-03-09 |
WO2002072284A3 (en) | 2004-03-04 |
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