EP1126976B1 - Verfahren und vorrichtung zur reinigung plattenförmiger gegenstände - Google Patents

Verfahren und vorrichtung zur reinigung plattenförmiger gegenstände Download PDF

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Publication number
EP1126976B1
EP1126976B1 EP99954065A EP99954065A EP1126976B1 EP 1126976 B1 EP1126976 B1 EP 1126976B1 EP 99954065 A EP99954065 A EP 99954065A EP 99954065 A EP99954065 A EP 99954065A EP 1126976 B1 EP1126976 B1 EP 1126976B1
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EP
European Patent Office
Prior art keywords
residues
cleansing composition
vessel
treating vessel
overflow
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EP99954065A
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English (en)
French (fr)
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EP1126976A1 (de
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Michel Bourdat
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/003—Cleaning arrangements or devices for screen printers or parts thereof
    • B41F35/005—Cleaning arrangements or devices for screen printers or parts thereof for flat screens

Definitions

  • the invention relates to a method and a machine for cleaning of objects generally in the form of plaques such as screens or stencils screen printing, in particular the screen printing stencils used in manufacturing electronic circuits for depositing solder adhesives and creams, and more particularly the stencils for frames, called self-tensioning, which are simple thin, flexible and fragile metal sheets.
  • these devices do not allow cleaning stencils for self-tensioning frames, too fragile to be able to support a cleaning by manual rubbing or by spraying under pressure.
  • VIGON ® SC 200 sold by the company Dr. O.K. WACK intended for the spray cleaning of screen printing screens, which has the advantage of eliminating at room temperature the adhesives used to mount the components on the surface (CMS) and the soldering creams, and is not flammable.
  • This composition based on alkoxy propanols in solution in water forms a microphase at a temperature between 20 and 30 ° C. It is recommended by the manufacturer, after application of the fluid by spraying on the objects to be cleaned, rinse with water. With these compositions, we see that the duration of the spray treatment of each part is generally more than 1 hour, including drying.
  • this device does not not allow to separate residues from successive treatments or alternatives of parts soiled with solder cream (light and heavy residues), then of parts soiled with glue (medium density residue). It should be noted in particular that this device does not in particular allow the separation of residues low density of other residues, especially medium density residues in suspension. This separation is indeed the most difficult to achieve but is important, especially since the low density residues such as the fluxes or greases have a chemical composition very different from the residues of medium density such as epoxy adhesives, and therefore require treatments different later.
  • this device does not include any means of heating does not allow the use of a liquid capable of forming a microphase. It therefore works either with a solvent or with a surfactant. In consequently, in such a device, the cleaning liquid dissolves the residues, and must therefore be regularly renewed, which is costly and harmful for the environment.
  • the invention therefore aims to overcome these drawbacks by proposing a method and a machine for cleaning objects in the general form of plates, such as screen printing stencils, which may be soiled with residues of average density - in particular density on the order of 1 -, and / or residues high density solids - especially density greater than 1 - and / or residues low density - especially less than 1 - and this under conditions economical compatible with industrial exploitation, and allowing the separation of at least low density residues.
  • the invention aims to allow the automatic separation of residues according to their density, after treatments successive or alternative of several different pieces soiled indifferently residue of any density.
  • the invention aims to allow the alternating treatment of parts soiled with low density residues and high density residues, such as screen stencils soiled with braze (including low density fluxes and alloy particles high density metal), and parts soiled with density residues medium such as screen stencils soiled with glue (residue from average density), and the separation of these different residues according to their density at each treatment, without maintenance intervention between two treatments of separate rooms.
  • the invention thus aims to allow the successive processing or alternative in series of parts soiled with different residues (regardless of low, high or medium density), with no waiting time between parts.
  • the invention aims in particular to avoid having to perform separate subsequent steps of rinsing and separating residues, and the permanent renewal of the cleaning composition used.
  • the invention also aims to propose a method and a machine inexpensive to invest, simple and economical to use and providing high cleaning efficiency.
  • the invention aims in particular to allow a complete treatment (cleaning and drying) with a shorter duration at 1 hr - in particular around 0.5 hr - per object.
  • the invention aims to allow the cleaning of objects of all natures, including fragile items, such as stencils for frames self-tensioning, soiled with various very resistant residues and adhering to the object such as metallic particles (solder alloys), solder fluxes, greases, glues (epoxy glues, adhesives for CMS, ).
  • objects of all natures including fragile items, such as stencils for frames self-tensioning, soiled with various very resistant residues and adhering to the object such as metallic particles (solder alloys), solder fluxes, greases, glues (epoxy glues, adhesives for CMS, ).
  • a method according to the invention is advantageously applicable to the cleaning of plate-shaped objects at least generally flat, the treatment tank being parallelepiped.
  • the invention is nevertheless equally applicable for objects in the form of plates not strictly flat (wavy, cylindrical or semi-cylindrical ).
  • the form of the walls of the treatment tank is adapted to that of the objects to be cleaned, so as to present longitudinal vertical walls of at least shapes substantially combined with those of the main vertical faces of the objects.
  • the objects have main faces in the form of a surface. set (plane, cylinder or portion of cylinder with a circular base or whatever), and the vertical walls of the treatment tank have a similar shape.
  • the cleaning composition being an azeotrope, it is removed from the object by simple evaporation (by natural convection or drying at hot air) without leaving a trace. Its density corresponding to that of the residues of medium density, it causes these residues in its movement.
  • the residues of high density flow to the bottom of the treatment tank and are entrained with the cleaning composition extracted from the lower part of the treatment tank.
  • the cleaning composition is adapted so as not to dissolve the residues, and therefore does not load residues.
  • a cleaning composition formed of a solution is used aqueous having the effect of dissociating the residues from the object without dissolving them.
  • the composition of cleaning is a non-flammable solution.
  • the residues of medium density are adhesives of density close to 1
  • the residues of low density are fluxes of solder creams or fats
  • residues of strong density are particles of metallic alloys of solder or solder or those conductive adhesives.
  • a cleaning composition formed from an aqueous solution of at least one component forming a microphase - in particular at least one alkoxy alcohol - to a temperature below 50 ° C, and the cleaning composition is maintained at a suitable treatment temperature to allow the formation of the microphase, in particular below 50 ° C.
  • a propylene glycol ether such as propylene glycol methyl ether and / or a dipropylene glycol monoether
  • an ether polypropylene glycol such as ethoxypropoxypropanol and / or n-butoxypropanol.
  • a saturated aqueous solution of at least one cleaning agent such as described in US-5,486,314.
  • the cleaning composition can be used at low temperature (below 50 ° C - especially between 20 ° C and 30 ° C -), we avoid any polymerization, crosslinking or hardening phenomenon triggered by heating of residues, which facilitates cleaning.
  • cleaning composition of VIGON ® SC 200 sold by the company Dr. O.K. Wack Chemie GmbH (Ingolstadt, GERMANY) whose composition exact chemical is not known.
  • the density of this cleaning composition is equal to 1. It should be noted however that contrary to the recommendations of the manufacturer, the inventor has found with surprise that this composition has a high efficiency when used in the form of a bath, that is to say even in the absence of mechanical energy supply by spraying. It forms a microphase between 20 ° C and 30 ° C.
  • the cleaning composition is replenishes the cleaning composition by spraying onto the free surface of the cleaning composition contained in the treatment tank, from at least minus a spray boom, placed at a height greater than that of the overflow wall.
  • the cleaning composition over said entire free surface.
  • two spray bars are used which are parallel to each other, the jets formed by a ramp intersecting those of the other ramp immediately above or at the level of said free surface so as to form a curtain of cleaning composition having the effect of rinsing an object during extraction of the treatment tank.
  • the flow rate is adapted Q1 of cleaning composition extracted from the treatment tank so that the residence time in the treatment tank is between 30 s and 5 min - especially of the order of 2 to 4 min.
  • This flow Q1 is adapted to allow the training of medium and / or high density residues by the composition of cleaning but also the counter-current flotation of low density residues and their separation by filtering in specific filtering means, and so that the cleaning composition can produce its effects on residues.
  • the value of this flow Q1 can be adjusted empirically by tests according to the nature of the residue, the shape of the object and the treatment tank.
  • a tank is used treatment adapted to present spaced longitudinal vertical walls vertical main faces of the object from a distance between 1 to 5 cm - in particular of the order of 2 to 3 cm -.
  • the distance between the vertical walls of the treatment tank and the object faces is as small as possible, so that as much as possible in the treatment tank a slow flow homogeneous and free from turbulence of the cleaning composition, and minimize the volume of cleaning composition used in the machine,
  • advantageously and according to the invention transmits ultrasound in the treatment tank in at least one direction perpendicular to the main plane of an object in place in the treatment tank.
  • This ultrasound in particular facilitates the action of the cleaning composition in the interstices or microperforations of the object.
  • the invention extends to a machine for implementing of a method according to the invention.
  • the machine according to the invention comprises at least one spray bar of the cleaning composition on the surface free of the cleaning composition contained in the treatment tank, this spray bar being disposed at a height greater than that of the wall of overflow.
  • it comprises two ramps of spraying parallel to each other, the jets formed by a ramp intersecting those of the other ramp immediately above or at the level of said surface free so as to form a curtain of cleaning composition having the effect of rinse an object during extraction from the treatment tank.
  • the spray bars are arranged at least substantially above and vertically above the upper extreme edges of two vertical walls longitudinal of the treatment tank, at least one of which forms the wall of overflow.
  • a first ramp belongs to the first means of circulation and a second spray bar belongs to the second means of circulation.
  • the wall of overflow is formed by one of the longitudinal vertical walls of the tank treatment whose upper extreme edge is at a height lower than that upper extreme edges of the other vertical walls of the tank treatment.
  • the treatment tank is suitable for presenting longitudinal vertical walls spaced from the faces main verticals of the object from a distance between 1 and 5 cm - especially of the order of 2 to 3 cm -.
  • the machine includes means for emitting ultrasound associated with at least one of the walls longitudinal vertical of the treatment tank so as to emit ultrasound in the treatment tank in at least one direction perpendicular to a main plane of an object in place in the treatment tank.
  • the first and / or second circulation means include reheating means thermostatically controlled cleaning composition disposed downstream of the means of filtering of residues, and upstream of means for reintroducing the composition the upper part of the treatment tank.
  • the first means of circulation comprise a filter, known as first filter, and a pump, known as first pump
  • the second circulation means have a so-called second filter filter, and a pump, called the second pump.
  • the first and second filters are similar, and the first and second pumps are similar.
  • the first means of circulation may include a single cleaning composition outlet in bottom of the treatment tank, and a single filter capable of filtering density residues medium and retain high density residues, while separating them, in particular by decantation.
  • this filter can be formed from a reservoir containing a cylindrical filter cartridge radially traversed by the liquid to be filtered. This variant is advantageously applicable when successively or alternatively, indifferently, pieces, such as stencils, soiled with soldering creams then pieces soiled with glue.
  • the same filter retains high density residues (particles) at the bottom of the tank receives when the treated part is soiled with solder cream (these residues falling at the bottom of the tank under the effect of gravity), then retains the medium density residue it receives when the treated part is soiled with glue (residues being suspended in the liquid).
  • the small volume of cleaning composition allows to treat successively or alternately parts soiled with residues different, with a short waiting time between each part.
  • two separate outlet ports can be provided one of which at the bottom of the treatment tank supplies a filter capable of filtering residues of high density, while another, located at a higher level (above the bottom of the treatment tank but nevertheless in the lower part of the treatment tank treatment), feeds another filter capable of filtering medium density residues.
  • the low density residues are separated in a specific filter separate from the second circulation means.
  • the treatment tank is of parallelepiped shape, width between 3 cm and 10 cm - in particular of the order of 5 cm or 6 cm -, and has a volume of between 10 l to 100 l - in particular of the order of 50 l -.
  • the height of the treatment tank is at least equal to that of the objects to be cleaned.
  • the machine includes a frame for hanging an object in the form of a flexible plate in the treatment tank, this suspension frame being adapted to receive and maintain the peripheral edges of the object.
  • the invention also relates to a method and a machine. characterized in combination by all or some of the characteristics mentioned above or below.
  • the machine according to the invention comprises a treatment 1 adapted to be able to contain a liquid cleaning composition and at least one object to be cleaned 2 in the general form of a plate such as a stencil of screen printing immersed in this cleaning composition.
  • This tank of treatment 1 is formed of metallic stainless steel walls and is broadly parallelepiped. It includes a longitudinal vertical wall external 3, a bottom horizontal bottom 4, a longitudinal vertical wall 5, called overflow wall 5, the upper end edge 6 of which is at a height lower than that of the upper extreme edge 7 of the longitudinal vertical wall external 3, so that the liquid cleaning composition contained in the tank treatment 1 overflows above this upper extreme edge 6 to flow in an overflow tank 8 adjacent to the treatment tank 1, the wall of overflow 5 being a longitudinal vertical wall common to the tank treatment 1 and to the overflow tank 8.
  • the overflow wall 5 is parallel and opposite the external longitudinal vertical wall 3.
  • the overflow tank 8 is lower than the treatment tank 1.
  • the overflow tank 8 is delimited by an external longitudinal vertical wall 9 which, preferably, has an upper extreme edge 10 at a level at least substantially identical to that of the upper extreme edge 7 of the longitudinal vertical wall external 3 of the treatment tank 1.
  • the two tanks 1, 8 are closed on the side by vertical side walls 11, 12.
  • the two tanks 1, 8 are open to the top.
  • the bottom 13 of the overflow tank 8 is at a higher height to that 4 of the treatment tank 1.
  • the external longitudinal vertical wall 9 of the overflow tank 8 is provided with a level sensor 14 which allows to interrupt the operation of the machine if the level of composition liquid in the overflow tank 8 becomes lower than the predetermined value by this sensor 14.
  • the external longitudinal vertical wall 3 of the tank treatment 1 is equipped with 15 transducers, ultrasonic transmitters, regularly distributed over the surface of this wall 3.
  • the ultrasonic emitters 15 are supplied by a generator 16 controlled by electronics 17 for controlling operation of the machine according to the invention.
  • This electronics 17 of control incorporates in particular a timer for the operation of ultrasonic transducers 15.
  • the object 2 to be cleaned is positioned at least substantially in the middle of the treatment tank 1, at mid-distance between the external longitudinal vertical wall 3 and the wall of overflow 5, so that a flow of cleaning composition flows vertically from top to bottom along each of the vertical faces 18, 19 of object 2.
  • object 2 is placed in the treatment tank 1 so as not to come in contact with the bottom 4. To do this, it is suspended in the treatment tank 1 by any suitable suspension device, for example one or more hooks of suspension coming to cooperate with the upper extreme edges 6, 7 of the walls longitudinal verticals 3, 5 and / or vertical lateral walls 11, 12.
  • the upper extreme edges 20, 21 of the vertical walls lateral 11, 12 are preferably at the same level as the extreme edges upper 7, 10 of the longitudinal external vertical walls 3, 9 of the tanks 1, 8.
  • the treatment tank 1 can be provided with crosspieces connecting the upper extreme edges 6, 7 of its longitudinal vertical walls 3, 5 to facilitate the hanging of objects 2 to be cleaned.
  • Figure 4 shows an accessory for suspend an object in the form of a metal plate in the treatment tank 1 thin flexible, such as a screen printing stencil for a self-tensioning frame.
  • This accessory is formed by a frame 22 comprising two vertical uprights in the form slide 23 adapted to receive the vertical peripheral edges 24 of object 2.
  • the two uprights 23 are connected in the upper part by a cross-member upper 25 welded to these uprights 23, and whose ends extend in laterally projecting from the upright 23 to form legs 26 of suspension able to rest on crosspieces of treatment tank 1 or on upper extreme edges 20, 21 of its vertical side walls 11, 12.
  • Two transverse crosspieces 25, one on each side can be provided as a variant not represented.
  • a cross member 27 also connects the lower ends of the uprights 23.
  • the lower ends of these uprights 23 can be closed and welded to prevent slipping of object 2 beyond these ends.
  • Two crosspieces 27 can be provided, in variant not shown, one on each side. It is also possible to weld the ends of the cross member 27 inside the lower end of each upright 23 in the form of a slide to close the lower end thereof.
  • the cleaning composition is partly extracted bottom of the treatment tanks 1 and overflow 8, filtered and replenished in the upper part of the treatment tank 1.
  • the treatment tank 1 comprises an outlet orifice 28 of the cleaning composition formed at the bottom 4 of the tank treatment 1, or even through this background 4, and by which the composition is extracted of cleaning.
  • This orifice 28 is connected via a valve 29 to a conduit on which is interposed a filter 31, then a pump 32 which supplies the cleaning composition in a heater 33.
  • the conduit 30 feeds a spray boom 34 disposed above the edge upper extreme 7 of the external longitudinal vertical wall 3 of the tank treatment 1.
  • the filter 31 is adapted to retain both the residues of medium density and high density residues, extracted from the bottom of the tank treatment 1 with the cleaning composition.
  • This filter 31 is for example formed a cylindrical settling tank containing a filter cartridge hollow cylindrical crossed radially by the composition to be filtered, so known per se.
  • Pump 32 is an electric pump which is chosen for providing a nominal flow such as the flow Q1 of cleaning composition extracted of the treatment tank 1 corresponds to a residence time in the treatment tank treatment 1 between 30 seconds and 5 min - in particular of the order of 2 to 4 min -, and this taking into account the pressure losses of the circuit.
  • a pump 32 of nominal flow rate of the order of 20 l / min allows a residence time of the order of 2 to 4 min of the composition in the treatment tank 1.
  • the heater 33 may be formed from a hollow cylinder partitioned so as to form baffles and surrounded by an electrical resistance, the everything being padded.
  • the control electronics 17 are adapted for control the operation of the electric pump 32 and the heater 33.
  • First means 28, 29, 30, 31, 32, 33 are thus produced, 34 for circulation of the cleaning composition within the treatment tank 1.
  • an outlet orifice 35 is provided at the bottom of the overflow tank 8.
  • This outlet orifice 35 is connected to a conduit 36 by through a valve 37.
  • a filter 38 Also on this conduit 36 are interposed a filter 38, and an electric pump 39 which supplies the cleaning composition in the heater 33, then in a second spraying ramp 40 arranged above the extreme vertical edge 6 of the overflow wall 5.
  • the assembly 35, 36, 37, 38, 39, 33, 40 form of the second means of circulation of the cleaning composition for continuously extracting a flow rate Q2 of composition for cleaning the overflow tank 8 and reintroducing it continuous in the treatment tank 1 after passing through the filter 38, which is adapted to retain low density residue.
  • the two spray bars 34, 40 are parallel to one another. the other and have nozzles (Figure 2) regularly distributed over their entire length and directed downwards and inclined approximately 45 ° with respect to the horizontal (figure 1) towards the inside of the treatment tank 1.
  • Each nozzle of a ramp 34, 40 preferably forms a flared divergent jet extending at the less substantially in a plane inclined downwards, for example at about 45 °, towards the inside of the treatment tank 1, and towards the jets coming from the nozzles of the other ramp 40, 34. In this way, the different jets from the different nozzles of a same ramp 34 or 40 intersect before contacting the upper free surface 41 of the bath of cleaning composition contained in the treatment tank 1.
  • the jets from the two ramps 34, 40 intersect at a level located above of the upper free surface 41. It follows that the composition of cleaning is distributed over the entire upper free surface 41 of the cleaning composition, homogeneously. Also, when we extract vertically upwards the object 2 of the treatment tank 1 after cleaning, the cleaning composition jets from the two ramps 34, 40 form a curtain crossed by object 2 which is thus automatically rinsed on its two sides during its extraction from the treatment tank 1.
  • the spraying ramps 34, 40 do not directly spray the object 2 to be cleaned, but only the free surface 41 of the bath of cleaning composition in which the object 2 is immersed.
  • the two pumps 32, 39 are similar, so that the flow rates Q1 extracted from the treatment tank 1 and Q2 extracted from the 8 overflow tank are similar.
  • the treatment tank 1 of cleaning composition until it overflows, by the overflow wall 5, in the overflow tank 8 in which also introduces a sufficient amount of cleaning composition so that the level of cleaning composition in this overflow tank 8 is located above the sensor 14 and the valves 29, 37 are opened. runs the machine by triggering the control electronics 17 thanks to a external control button provided for this purpose. Control electronics 17 controls the operation of the heater 33, the ultrasound generator 16, and pumps 32, 39.
  • a third circulation circuit taking the cleaning composition either halfway up, or slightly above the bottom 4 of the treatment tank 1, but at a level corresponding at least substantially to the lower part of object 2 placed in the treatment tank 1.
  • a filter specific which can be powered by the same electric pump 32, or by a third pump leading to the heater 33 and the manifold 34.
  • the machine according to the invention can be realized in a particularly compact form and little expensive.
  • the machine can be provided with a receptacle for 2 objects cleaned for drying.
  • This receptacle can be supplied with air using a suitable fan. It should be noted that the composition of cleaning remaining on object 2, by evaporating, leaves no trace, since it is an azeotropic cleaning composition not loaded with residues.
  • the control electronics 17 can incorporate a timer and / or heater operating thermostat 33.
  • a machine according to the invention has been produced in accordance with embodiment shown in the figures having a width of 60 mm between the vertical longitudinal walls 3.5 of the treatment tank 1, a height and length of around 85 cm.
  • This treatment tank 1 allows receive a screen printing stencil in the form of a 29 inch square plate (73.66 cm) side.
  • the machine was used with VIGON ® SC 200. The operating temperature was 25 °. With such a machine, it is it is it is possible to successively process three screen printing stencils for frames self-tensioning in about an hour. The stencils thus cleaned are perfectly clean and in perfect condition, and dry. We deal successively or alternately with stencils soiled with solder paste and / or stencils soiled with glue, with a waiting time less than 1 min between two pieces.

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  • Cleaning By Liquid Or Steam (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Detergent Compositions (AREA)

Claims (23)

  1. Verfahren zum Reinigen von Artikeln mit der allgemeinen Form von Platten, wie z.B. Siebdruckschablonen, anfällig für das Verschmieren mit Rückständen mit einer mittleren Dichte, wie Klebepartikeln, und/oder mit festen Rückständen mit einer hohen Dichte, wie Metallpartikeln, und/oder mit Rückständen mit einer geringen Dichte, wie Lötungsflüssen oder Fetten, worin zumindest ein zu reinigender Artikel in eine mit einer Reinigungszusammensetzung gefüllten Wanne, sogenannte Verarbeitungswanne, eingetaucht wird, wobei zumindest eine (5) der vertikalen Wänden der Verarbeitungswanne (1), sogenannte Überlaufwand (5), an die Bildung eines Überlaufbehälters zum Überlauf in eine zweite anliegende Wanne, sogenannte Überlaufwanne (8), angepaßt ist, und wobei die Überlaufwand (5) mit der Verarbeitungswanne (1) und der Überlaufwanne (8) gemeinsam ist, worin aus der Verarbeitungswanne (1) zumindest ein Reinigungszusammensetzungsfluß (Q1) kontinuierlich ausgezogen wird, welcher nach einem Durchfluß durch Filtermittel (31) zum Filtern der Rückstände in die Verarbeitungswanne (1) wieder kontinuierlich zugeführt wird, und worin aus der Überlaufwanne (8) ein Reinigungszusammensetzungsfluß (Q2) kontinuierlich ausgezogen wird, welcher nach einem Durchfluß durch Filtermittel (38) zum Filtern der Rückstände in die Verarbeitungswanne (1) wieder kontinuierlich zugeführt wird,
    dadurch gekennzeichnet, daß :
    eine Reinigungszusammensetzung verwendet ist, welche aus einer azeotropen flüssigen Lösung besteht, deren Dichte der Dichte der Rückstände mit einer mittleren Dichte zumindest wesentlich gleich ist, und an das Losmachen der Rückstände vom Artikel (2) angepaßt ist, ohne daß diese gelöst werden,
    zumindest ein Artikel (2) in einer Verarbeitungswanne (1) vertikal gesetzt wird, wobei die genannte Verarbeitungswanne zumindest wesentlich vertikale Wände, sogenannte vertikale Längswände. (3, 5), entsprechend aufweist, die mit einem Abstand, kleiner als 10 cm, von zumindest wesentlich vertikal angeordneten Hauptflächen, sogenannten vertikalen Flächen (18, 19), eines zu reinigenden Artikels (2), angeordnet sind,
    die Reinigungszusammensetzung aus dem unteren Abschnitt der Verarbeitungswanne (1) kontinuierlich ausgezogen, und aus der Überlaufwanne (8) kontinuierlich ausgezogen, und nach einem Durchfluß durch Filtermittel (31, 38) in den oberen Abschnitt der Verarbeitungswanne (1) die gesamte aus den beiden Wannen (1, 8) ausgezogenen Reinigungszusammensetzung wieder kontinuierlich zugeführt wird, wobei der Artikel (2) in die Reinigungszusammensetzung eingetaucht wird, die kontinuierlich durch die Verarbeitungswanne (1) entlang des Artikels (2) hinuntergehend mit einem solchen Fluß (Q1) umläuft, daß :
    die Reinigungszusammensetzung eine Wirkung auf den Rückständen haben kann, so daß diese vom Artikel (2) losgemacht werden,
    die Rückstände mit einer mittleren Dichte und die Rückstände mit einer hohen Dichte von der Reinigungszusammensetzung wegtransportiert werden können,
    die Flotation der Rückstände mit einer geringen Dichte und deren Trennung durch Überlauf in die Überlaufwanne (8) erlaubt werden,
       so daß, in einem einzigen Schritt, die Rückstände vom Artikel (2) getrennt werden, zumindest die Rückstände mit einer geringen Dichte getrennt werden, und die Rückstände aus der Reinigungszusammensetzung ausgezogen werden, welche sich nicht mit Rückständen belastet.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß eine Reinigungszusammensetzung aus einer wässerigen Lösung verwendet ist, deren Wirkung das Losmachen der Rückstände vom Artikel (2) ist, ohne daß diese gelöst werden.
  3. Verfahren nach einem der Ansprüchen 1 und 2, dadurch gekennzeichnet, daß eine Reinigungszusammensetzung mit einer Dichte in der Größe von 1 verwendet ist.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß eine Reinigungszusammensetzung aus einer wässerigen Lösung von zumindest einer microphasigen Komponente - besonders zumindest einem Alkoxyalkohol - bei einer Temperatur unter 50°C verwendet ist, und daß die Reinigungszusammensetzung an einer für die Bildung der Microphase geeigneten Verarbeitungstemperatur erhalten wird.
  5. Verfahren nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß als Reinigungszusammensetzung VIGON®SC 200 verwendet ist.
  6. Verfahren nach einer der Ansprüche 1 bis 5, dadurch gekennzeichnet ist, daß die Reinigungszusammensetzung durch Spritzen an die freie Oberfläche (41) der in der Verarbeitungswanne (1) enthaltenen Reinigungszusammensetzung von zumindest einer Sprührampe (34, 40) wieder zugeführt wird, die in einer größer Höhe als diese der Überlauf wand (5) angeordnet ist.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß die Reinigungszusammensetzung an die gesamte freie Oberfläche (41) verbreitet.
  8. Verfahren nach einem der Ansprüche 6 und 7, dadurch gekennzeichnet, daß zwei parallelen Sprührampen (34, 40)verwendet sind, wobei die von einer Rampe (34) gebildete Strahlen die Strahlen der anderen Rampe (40) kurz oberhalb oder in der Höhe der genannten freien Oberfläche (41) schneiden, so daß eine Reinigungszusammensetzungsschürze gebildet ist, deren Folge die Spülung eines Artikels (2) bei dessen Ausziehen aus der Verarbeitungswanne (1) ist.
  9. Verfahren nach einer der Ansprüche 1 bis 8, dadurch gekennzeichnet daß, der Reinigungszusammensetzungsfluß (Q1) aus der Verarbeitungswanne (1) so angepaßt ist, daß der Verweilzeit in der verarbeitungswanne (1) zwischen 30 s und 5 min., insbesondere in der Größe von 2-4 min. ist.
  10. Verfahren nach einer der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß eine. Verarbeitungswanne (1) verwendet ist, welche vertikale Längswände (3, 5) entsprechend aufweist, die mit einem Abstand zwischen 1 und 5 cm, insbesondere in der Größe von 2-3 cm, von der vertikalen Flächen (18, 19) des Artikels (2) angeordnet sind,
  11. Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß Ultraschalle in der Verarbeitungswanne (1) in einer Richtung zumindest senkrecht zur Hauptebene eines in der Verarbeitungswanne (1) gesetzten Artikels (2) erzeugen werden.
  12. Maschine zur Reinigung von Artikeln mit der allgemeinen Form von Platten, wie z.B. Siebdruckschablonen, anfällig für das Verschmieren mit Rückständen mit einer mittleren Dichte, wie Klebepartikeln, und/oder mit festen Rückständen mit einer hohen Dichte, wie Metallpartikeln, und/oder mit Rückständen mit einer geringen Dichte, wie Lötungsflüssen oder Fetten, worin eine Wanne, sogenannte Verarbeitungswanne (1), zum Enthalten einer wässerigen Reinigungszusammensetzung und zumindest eines zu reinigenden Artikels (2), eingetaucht in dieser Reinigungszusammensetzung, angeordnet ist, wobei zumindest eine (5) der vertikalen Wände der Verarbeitungswanne (1), sogenannte Überlaufwand (5), an die Bildung einer Überlaufbehälter für den Überlauf in eine zweite anliegende Wanne, sogenannte Überlaufwanne (8), angepaßt ist, und die Überlaufwand (5) gemeinsam mit der Verarbeitungswanne (1) und der Überlaufwanne (8) ist, worin Mittel, sogenannte erste Umlaufmittel (28, 29, 30, 31, 32, 33, 34), zum kontinuierlichen Ausziehen zumindest eines Reinigungszusammensetzungsflusses (Q1) aus der Verarbeitungswanne (1) und zum kontinuierlichen Zuführen wieder in die Verarbeitungswanne (1) nach einem Durchfluß. durch Filtermittel (31) zum Filtern der Rückstände angeordnet sind, und worin Mittel, sogenannte zweite Umlaufmittel (35, 36, 37, 38, 39, 33, 40), zum kontinuierlichen Ausziehen eines Reinigungszusammensetzungsflusses (Q2) aus der Überlaufswanne (8) und zum kontinuierlichen Zuführen wieder in die Verarbeitungswanne (1) nach einem Durchfluß durch Filtermittel (38) zum Filtern der Rückstände angeordnet sind,
       dadurch gekennzeichnet, daß
    die Verarbeitungswanne (1) zumindest einen zu reinigenden Artikel (2) in der vertikalen Stellung aufnehmen kann, und zumindest wesentlich vertikale Wände, sogenannte vertikale Längswände (3, 5), entsprechend aufweist, die mit einem Abstand, kleiner als 10 cm, von zumindest, wesentlich vertikal angeordneten Hauptflächen, sogenannten vertikalen Flächen (18, 19), eines zu reinigenden Artikels (2), angeordnet sind,
    die ersten Umlaufmittel (28, 29, 30, 31, 32, 33, 34) zum kontinuierlichen Ausziehen der Reinigungszusammensetzung aus dem unteren Abschnitt der Verarbeitungswanne (1) und zum kontinuierlichen Zuführen wieder in den oberen Abschnitt der Verarbeitungswanne (1) vorgesehen sind,
    die zweite Umlaufmittel (35, 36, 37, 38, 39, 33, 40) zum Zuführen der aus der Überlaufwanne (8) ausgezogenen Reinigungszusammensetzung wieder in den oberen Abschnitt der Verarbeitungswanne (1) vorgesehen sind,
    die ersten Umlaufmittel (28, 29, 30, 31, 32, 33, 34) zum Erhalten in der Verarbeitungswanne (1) und entlang des Artikels (2) einen Reinigungszusammensetzungsfluß (Q1) vorgesehen sind, der hinuntergehend mit einem solchen Durchfluß abfließt, daß :
    die Reinigungszusämmensetzung eine Wirkung auf den Rückständen haben kann, so daß diese vom Artikel (2) losgemacht werden,
    die Rückstände mit einer mittleren Dichte und die Rückstände mit einer hohen Dichte von der Reinigungszusammensetzung wegtransportiert werden können,
    die Flotation der Rückstände mit einer geringen Dichte und deren Trennung durch das Überlauf in die Überlaufwanne (8) erlaubt werden,
       so daß, in einer einzigen Schritt, die Rückstände vom Artikel (2) losgemacht, zumindest die Rückstände mit einer geringen Dichte getrennt, und die Rückstände aus der Reinigungszusammensetzung, die sich nicht mit Rückständen belastet, ausgezogen werden, dadurch daß die Reinigungszusammensetzung aus einer azeotropen wässerigen Lösung besteht, deren Dichte der Dichte der Rückstände mit einer mittleren Dichte zumindest wesentlich gleich ist, und daß sie an das Losmachen der Rückstände vom Artikel (2) angepaßt ist, ohne daß diese gelöst werden.
  13. Maschine nach Anspruch 12, dadurch gekennzeichnet, daß sie zumindest eine Sprührampe (34, 40) zum Sprühen der Reinigungszusammensetzung an die freie Oberfläche (41) der in der Verarbeitungswanne (1) enthaltenen Reinigungszusammensetzung aufweist, wobei diese Sprührampe (34, 40) in einer größer Höhe als diese der Überlaufwand (5) angeordnet ist.
  14. Maschine nach Anspruch 13, dadurch gekennzeichnet, daß sie zwei parallelen Sprührampen (34, 40) aufweist, wobei die von einer Rampe (34) gebildeten Strahlen die Strahlen der anderen Rampe (40) kurz oberhalb oder in der Höhe der genannten freien Oberfläche (41) schneiden, so daß eine Reinigungszusammensetzungsschürze gebildet ist, deren Folge die Spülung eines Artikels (2) bei dessen Ausziehen aus der Verarbeitungswanne ist.
  15. Maschine nach Anspruch 14, dadurch gekennzeichnet, daß die Sprührampen (34, 40) zumindest wesentlich oberhalb oder in der Höhe der extremen Oberränder (6, 7) von zwei vertikalen Längswänden (3, 5) der Verarbeitungswanne (1) angeordnet sind, wobei zumindest eine Längswand die Überlaufwand (5) bildet.
  16. Maschine nach einem der Ansprüche 14 oder 15, dadurch gekennzeichnet, daß eine erste Sprührampe (34) den ersten Umlaufmitteln (28, 29, 30, 31, 32, 33, 34) und eine zweite Sprührampe (40) den zweiten Umlaufmitteln (35, 36, 37, 38, 39, 33, 40) gehört.
  17. Maschine nach einem der Ansprüche 12 bis 16, dadurch gekennzeichnet, daß die Überlaufwand (5) von einer der vertikalen Längswände (3, 5) der Verarbeitungswanne (1) gebildet ist, deren extremer Oberrand (6) in einer kleiner Höhe als diese der extremen Oberränder (7, 20, 21) der anderen vertikalen Wände (3, 11, 12) der Verarbeitungswanne (1) sich befindet.
  18. Maschine nach einer der Ansprüche 12 bis 17, dadurch gekennzeichnet, daß die Verarbeitungswanne (1) vertikale Längswände (3, 5) entsprechend aufweist, die mit einem Abstand zwischen 1 und 5 cm, insbesondere in der Größe von 2-3 cm, von der vertikalen Flächen (18, 19) des Artikels (2) angeordnet sind.
  19. Maschine nach einem der Ansprüche 12 bis 18, dadurch gekennzeichnet, daß sie Mittel (15, 16) zum Erzeugen von Ultraschallen aufweist, die in Verbindung mit zumindest einer (3) der vertikalen Längswände (3, 5) der Verarbeitungswanne (1) sind, so daß sie in der Verarbeitungswanne (1) in einer Richtung, zumindest senkrecht zu einer Hauptebene eines in der Verarbeitungswanne (1) gesetzten Artikels (2), Ultraschalle erzeugen.
  20. Maschine nach einem der Ansprüche 12 bis 19, dadurch gekennzeichnet, daß die ersten (28, 29, 30, 31, 32, 33, 34) und/oder die zweiten (35, 36, 37, 38, 39, 33, 40) Umläufmittel Mittel (33) zur thermostabilisierten Erhitzung der Reinigungszusammensetzung aufweisen, die unterhalb der Filtermittel (31, 38) zum Filtern der Rückstände und oberhalb der Mittel (34, 40) zum Zuführen der Reinigungszusammensetzung wieder in den oberen Abschnitt der Verarbeitungswanne (1) angeordnet sind.
  21. Maschine nach einem der Ansprüche 12 bis 20, dadurch gekennzeichnet, daß die ersten Umlaufmittel (28, 29, 30, 31, 32, 33, 34) einen ersten Filter (31) und eine erste Pumpe (32) aufweisen, daß die zweiten Umlaufmittel (35, 36, 37, 38, 39, 33, 40) einen zweiten Filter (38) und eine zweite Pumpe (39) aufweisen, daß die erste und zweite Filter (31, 38) gleich sind, und daß die erste und zweite Pumpen (32, 39) gleich sind.
  22. Maschine nach einem der Ansprüche 12 bis 21, dadurch gekennzeichnet, daß die Verarbeitungswanne (1) die Forme eines Quaders mit eine Breite zwischen 3 cm und 10 cm, insbesondere in der Größe von 5 cm oder 6 cm, und ein Volumen zwischen 10 l und 100 1, insbesondere in der Größe von 50 l, hat.
  23. Maschine nach einem der Ansprüche 12 bis 22, dadurch gekennzeichnet, daß sie einen Tragrahmen (22) zum Tragen eines Artikels (2) in der Form einer flexiblen Platte in der Verarbeitungswanne aufweist, wobei dieser Tragrahmen (22) zum Aufnahmen und Erhalten der Umfangsränder (24) des Artikels (2) vorgesehen ist.
EP99954065A 1998-11-06 1999-11-04 Verfahren und vorrichtung zur reinigung plattenförmiger gegenstände Expired - Lifetime EP1126976B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9813981A FR2785558B1 (fr) 1998-11-06 1998-11-06 Machine de nettoyage pour des plaques, notamment des pochoirs de serigraphie
FR9813981 1998-11-06
PCT/FR1999/002702 WO2000027639A1 (fr) 1998-11-06 1999-11-04 Procede et machine de nettoyage d'objets en forme de plaques

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EP1126976B1 true EP1126976B1 (de) 2002-09-18

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EP (1) EP1126976B1 (de)
AT (1) ATE224301T1 (de)
DE (1) DE69903055T2 (de)
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ATE272704T1 (de) * 1999-10-19 2004-08-15 Chim 92 Reinigungsmittel, verfahren zur reinigung von siebdruckschablonen und vorrichtung zur reinigung
US7392814B2 (en) * 2004-12-24 2008-07-01 Dainippon Screen Mfg. Co., Ltd. Substrate processing apparatus and method
US10994311B2 (en) 2013-05-31 2021-05-04 Michel Bourdat Specific device for cleaning electronic components and/or circuits
FR3006209B1 (fr) 2013-05-31 2016-05-06 Michel Bourdat Dispositif et procede de nettoyage d'objets en forme de plaque
JP6121924B2 (ja) * 2014-02-20 2017-04-26 株式会社東芝 レーザ加工装置及びレーザ加工方法
DE102015006056B3 (de) * 2015-05-15 2016-09-22 Zentner Elektrik-Mechanik Gmbh Siebwaschmaschinen, Baureihe von Siebwaschmaschinen, Baukasten für Siebwaschmaschinen sowie Verwendung eines Baukastens zur Fertigung einer Siebwaschmaschine oder einer Baureihe von Siebwaschmaschinen
FR3061836B1 (fr) * 2017-01-17 2021-06-04 Gil Ching Dispositif et procede de nettoyage et/ou de decontamination d’aliments par des ondes acoustiques de haute frequence
US11330899B2 (en) * 2017-02-21 2022-05-17 Ganeshananda Roshan Premananda High capacity brush cleaner
CN111438087B (zh) * 2020-03-23 2021-12-03 上海市宝山区仁和医院 一种全自动免疫组化仪盖片的洗涤方法

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DE3212916A1 (de) * 1982-04-06 1983-10-13 Markku 02170 Espoo Hakala Verfahren und vorrichtung zum reinigen im seidendruck verwendeter seidentuecher
JPH0695509B2 (ja) * 1986-08-29 1994-11-24 ホ−ヤ株式会社 洗浄方法およびその装置
DE4010679C2 (de) * 1990-04-03 1994-06-01 Alois Egger Reinigungsvorrichtung für Siebdruckschablonen und Zubehör
JP2703424B2 (ja) * 1991-08-07 1998-01-26 シャープ株式会社 洗浄装置
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JPH0655151A (ja) 1992-08-10 1994-03-01 Hitachi Home Tec Ltd 超音波洗浄装置
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US5701821A (en) * 1996-05-22 1997-12-30 Fuji Machine Mfg. Co., Ltd. Screen cleaning apparatus and screen cleaning method

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FR2785558A1 (fr) 2000-05-12
DE69903055T2 (de) 2003-05-22
US6454867B1 (en) 2002-09-24
WO2000027639A1 (fr) 2000-05-18
FR2785558B1 (fr) 2001-01-12
DE69903055D1 (de) 2002-10-24
ATE224301T1 (de) 2002-10-15
EP1126976A1 (de) 2001-08-29

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