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
  • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
  • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
  • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
  • B05C1/0813—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for supplying liquid or other fluent material to the roller
• • 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
  • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
  • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
  • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
  • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
  • B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
  • B41P2235/00—Cleaning
  • B41P2235/10—Cleaning characterised by the methods or devices
  • B41P2235/26—Spraying devices

Definitions

• the present invention relates to a device for applying coating liquid to a sheet, comprising a rotary support cylinder around which a sheet continuously runs, - means for supplying coating liquid, a film collecting cylinder liquid, rotary, supplied by the supply means, and possibly means for transferring the liquid film from the collecting cylinder to the sheet moving around the support cylinder.
• Devices for coating liquid paint have been known for a long time on moving sheets. Commonly, a tank is used, called an inkwell, from which a rubberized cylinder takes paint and then transfers it to one or more successive cylinders, the last being a coating cylinder which applies the paint to the metal strip which runs and which rests itself on a large support cylinder
• the cleaning of these coating liquid application devices is necessary regularly. It is very complex, requires a lot of time and the consumption of detergent is very high. In addition, this cleaning is currently generally carried out manually and it has the disadvantage of being a risky operation for the workforce, given the toxicity of gaseous fumes and their danger of ignition.
• the present invention aims to solve these problems and to develop a device for overcoming the aforementioned drawbacks.
• the device must be able to be cleaned quickly and efficiently.
• this device further comprising a washing device comprising
• a lower shell forming a recovery container and an upper shell mutually movable between a closed position in which they form a closed enclosure containing the supply means, the collecting cylinder and the transfer means and an open position in which they are separated from each other, - a cleaning liquid reserve container, a coating liquid reserve container,
• first circulation means which are capable of supplying the supply means, in the open position of the enclosure, with coating liquid from the coating liquid reserve container
• second circulation means which are capable of supplying to the means for supplying, in the closed position of the enclosure, the cleaning liquid from the cleaning liquid reserve container
• projection means which are capable of projecting cleaning liquid through at least one of the two shells to wash the elements enclosed by the enclosure in the closed position
• This device allows a reduction in cleaning time, a reduction in the consumption of cleaning liquid, which is generally a solvent for the coating liquid, and greatly improved safety and hygiene since the vapors released by the solvent are confined in an enclosure. closed, from which they can be sucked in a common way.
• the washing device comprises as first and second circulation means, a circulation pump and a circuit comprising a supply conduit for introducing either coating liquid or cleaning in the supply means and an outlet conduit for discharging either coating liquid or cleaning liquid from the recovery container.
• this exemplary device therefore comprises a single circuit both for supplying coating liquid and for cleaning the supply means.
• the liquid projection means serve simultaneously as gas injection means.
• This device has a particularly simple and easy to handle arrangement.
• Figures 1 and 2 schematically show alternative embodiments of devices for applying coating liquid to a sheet.
• Figure 3 shows a detail of Figure 1.
• Figures 4 to 9 show an embodiment of the device according to the invention with cleaning device, at different successive stages of its use.
• Figure 1 there is shown an alternative embodiment of the device according to the invention very simple, which comprises a rotary support cylinder 1 around which continuously scrolls a metal sheet or strip 2.
• the pressed strip 2 passes through the air gap adjustable, existing between the support cylinder 1 and a cylinder called collector 3, the peripheral surface of which is advantageously made of a rubbery material.
• the collecting cylinder 3 rotates in the opposite direction to the supporting cylinder 1.
• a supply container 4 containing coating liquid to be applied to the strip 2 is mounted opposite the collecting cylinder 3, so as to extend along this one.
• This feed container 4 is shown in more detail in Figure 3, where, in the example illustrated, it is in the form of a feed chute of approximately prismatic shape.
• the chute 4 is open upwards and comprises a front wall 5 which is preferably parallel to the axis 6 of the collecting cylinder 3 and which extends approximately vertically.
• the chute further comprises a bottom wall 7 which extends obliquely upwards, from the bottom of the front wall 5, while forming at the lower corner of the chute thus formed, an outlet opening 8 for the liquid in the chute 4.
• a flexible doctor blade 9 is, in the example illustrated, arranged in an adjustable manner on the bottom wall 7 so as to be able to extend more or less far towards the peripheral surface of the cylinder. manifold 3.
• the flexible doctor blade 9 is composed of several superimposed blades and each having an elongated opening which makes it possible to fix them in an adjustable manner on the bottom wall 7.
• bolts 14, butterfly nuts 15 and plates also provided with an elongated hole. In this way it is possible to vary the distance between the blades of the doctor blade and the collecting cylinder, which will have the effect of causing these blades to flex more or less strongly and therefore to vary the pressure applied by the doctor blade and the amount of paint which can pass over the peripheral surface of cylinder 3.
• the illustrated feed chute 4 also includes two side walls 18 and a rear wall 20.
• the chute is mounted on a support bar 21, which is arranged so that it can rotate around its axis 22, using control means not shown. It is thus possible to adjust the outlet opening 8 by varying the inclination of the chute by a rotation thereof around the axis 22. This makes it possible to decrease or increase the pressure of the doctor blade on the collecting cylinder. 3 depending on the requested flow. All of these means therefore make it possible to apply the coating liquid to the collecting cylinder with a pressure which is perfectly determined according to the requirements, which makes it possible to avoid the problem of dewetting and to reduce the quantity of liquid required.
• the coating liquid is always circulated in the chute, from top to bottom, in a uniform manner, at a speed adjusted precisely to the quantity of liquid having to pass through the flexible doctor blade.
• This makes it possible to reduce the quantity of liquid which is normally necessary when using an inkwell by approximately four times, while avoiding all the drawbacks linked to the impurities which circulate therein.
• the device is thus continuously supplied with a liquid, preferably filtered and maintained at the right temperature and viscosity.
• FIGS. 1 and 3 Other supply means than those provided in FIGS. 1 and 3 can also be envisaged by those skilled in the art.
• a conventional inkwell 27 has been shown.
• an embodiment has also been provided with an additional cylinder 29 bearing on the collecting cylinder 3, the coating liquid being supplied in the air gap between these two cylinders to form a meniscus from which the liquid is driven by gravity by the collecting cylinder 3.
• the device according to the invention further comprises a washing device.
• a recovery container 33 which, in the example illustrated, has the shape of a shell.
• This shell 33 can for example recover any excess of coating liquid projecting laterally from the collecting cylinder, from the flexible doctor blade, or from the intermediate cylinders.
• a discharge conduit 34 provided with a valve 35, makes it possible to evacuate the liquid contained in the container 33 in a coating liquid reservoir 36, which allows recycling thereof (see FIGS. 4 and 9) or in a spent cleaning liquid tank 53 (see FIGS. 5 to 8).
• the device illustrated in FIGS. 4 to 9 comprises a cleaning device comprising in addition to the lower shell 33
• the upper shell is preferably provided with a vent pipe 38 for vapors and gases and spray nozzles 39 which can be connected to a flexible supply pipe 40 preferably provided a valve 41.
• the shells are mutually displaceable in a known manner, not shown, and can therefore form in a close position a closed enclosure as shown for example in FIG. 5.
• the supply duct 30, provided with a valve 42, is a flexible duct which is connected to the outlet of a circulation pump 43.
• the outlet of this pump 43 is also in communication with the flexible supply duct 40, by a pipe 44, provided at each of its two ends with a valve 45 and 46.
• An air compressor 47 is also connected to the flexible supply duct 40 by a pipe 48 provided with a valve 49.
• the inlet of the circulation pump 43 is connected to a flexible supply duct 50, provided with a valve 51 as well as a suction lance 52.
• This lance 52 can selectively be immersed in the coating liquid reservoir 36 (see FIG. 9) or in the spent cleaning liquid reservoir 53 ( see figure 5) or not to be immersed in any tank (see figures 4 and 6 to 8).
• the inlet of the circulation pump 43 is also provided with two pipes 54 and 55, each provided with a valve 56 and 57, one being immersed in the spent cleaning liquid tank 53 and the other in a tank. with fresh cleaning fluid 58.
• an outlet can be provided at 59 to a reservoir of cleaning liquid to be regenerated 60.
• valves, the circulation pump and the compressed air source can be put into operation according to an automated program.
• the opening and closing of the valves is controlled automatically and their positions are shown in the figures and will therefore not be the subject of a more precise description.
• the operator After spacing between the support cylinder 1 and the other cylinders in a known manner, the operator begins by purging the coating liquid supply circuit, as illustrated in FIG. 4. Air is drawn into the suction lance 52, previously taken out of the reservoir 36. It passes through the conduit 50, the circulation pump 43 and the supply conduit 30. It thus purges this supply circuit of coating liquid and the purged liquid is recovered in the lower shell 33, then recycled in the tank 36.
• the operator immerses the suction lance 52 as well as the discharge conduit 34 in the spent cleaning liquid tank 53. It is therefore the same circuit which served for the supply of liquid coating which serves to purge this circuit and to introduce the cleaning liquid.
• the upper shell 37 and the lower shell 33 are now in the closed position, and, for example for 10 seconds, the cleaning liquid will wash the coating liquid supply circuit.
• the suction lance 52 is again removed from the reservoir 53.
• cleaning liquid is sprayed for approximately 2 minutes into the interior of the enclosure formed by the shells, via the nozzles 39. The liquid thus washes the entire device and the used cleaning liquid returns to reservoir 53.
• valve 57 is closed and the valve 56 is opened, which makes it possible to suck in fresh cleaning liquid from the tank 58 and thus rinse installation.
• the suction lance 52 is again immersed in the coating liquid reservoir 36 as well as the discharge conduit 34 and the supply circuit is again open. The device is then ready for a new application command.
• the total time for such a cleaning can be approximately 10 minutes and the total consumption of cleaning liquid by 20 liters, whereas currently one can envisage a triple of time and a doubled quantity of product. Manual operations, often dangerous and unhealthy, such as cleaning the sides of the cylinders should no longer be considered. It should be understood that the present invention is in no way limited to the embodiments described above and that many modifications can be made thereto without departing from the scope of the appended claims.

Landscapes

• Coating Apparatus (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Electroplating Methods And Accessories (AREA)
• Spray Control Apparatus (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3896632

Family Applications (1)

Country Status (9)

Citations (3)

Family Cites Families (9)

• 2000
  • 2000-08-17 BE BE2000/0514A patent/BE1013647A3/fr not_active IP Right Cessation
• 2001
  • 2001-08-17 AU AU2001283721A patent/AU2001283721A1/en not_active Abandoned
  • 2001-08-17 AT AT01962493T patent/ATE294645T1/de active
  • 2001-08-17 DK DK01962493T patent/DK1309410T3/da active
  • 2001-08-17 ES ES01962493T patent/ES2240498T3/es not_active Expired - Lifetime
  • 2001-08-17 EP EP01962493A patent/EP1309410B1/de not_active Expired - Lifetime
  • 2001-08-17 PT PT01962493T patent/PT1309410E/pt unknown
  • 2001-08-17 DE DE60110607T patent/DE60110607T2/de not_active Expired - Lifetime
  • 2001-08-17 WO PCT/BE2001/000138 patent/WO2002013976A1/fr active IP Right Grant

Patent Citations (3)

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