EP0543322B1 - Procédé pour le nettoyage des parts métalliques - Google Patents

Procédé pour le nettoyage des parts métalliques Download PDF

Info

Publication number
EP0543322B1
EP0543322B1 EP92119602A EP92119602A EP0543322B1 EP 0543322 B1 EP0543322 B1 EP 0543322B1 EP 92119602 A EP92119602 A EP 92119602A EP 92119602 A EP92119602 A EP 92119602A EP 0543322 B1 EP0543322 B1 EP 0543322B1
Authority
EP
European Patent Office
Prior art keywords
workpieces
washing
fluid
cleaning
bath
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
Application number
EP92119602A
Other languages
German (de)
English (en)
Other versions
EP0543322A1 (fr
Inventor
Wilhelm Neubauer
Werner Comanns
Alexander Dr. Witte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aichelin GmbH
Original Assignee
Aichelin GmbH Germany
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6445333&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0543322(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Aichelin GmbH Germany filed Critical Aichelin GmbH Germany
Publication of EP0543322A1 publication Critical patent/EP0543322A1/fr
Application granted granted Critical
Publication of EP0543322B1 publication Critical patent/EP0543322B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • 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
    • B08B3/102—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 with means for agitating the liquid

Definitions

  • the invention relates to a method for washing metallic workpieces for a heat treatment following the washing.
  • Methods for washing, in particular for cleaning and / or rinsing metallic workpieces are typically used in linked heat treatment systems.
  • This includes, for example, vacuum heat treatment, piercing, roller hearth, vertical retort or multi-purpose chamber furnace systems, in which bright heat treatments, various annealing processes and hardening processes as well as diffusion processes such as nitriding, nitro carburizing, carbonitriding and carburizing can be carried out.
  • chlorinated hydrocarbons e.g. tetrachloroethene (Per) or trichloroethene (Tri) were used in the past to clean metallic workpieces. These were ideal cleaning agents, especially for removing greases and pigment dirt, the environmental impact of which but only became known and considered at a later date.
  • CHC chlorinated hydrocarbons
  • tetrachlorethylene and trichlorethylene especially tetrachlorethylene and trichlorethylene
  • Trichloroethene (Tri) is now suspected of causing cancer, so that this cleaning agent has practically been withdrawn from circulation in Europe.
  • a clean surface is also essential for vacuum heat treatments, bright annealing processes, coatings or the like.
  • water-soluble cleaning agents for example highly wash-active, mostly surfactant-containing substances, have a reduced solubility for fats compared to chlorinated hydrocarbons (CHC), so that the cleaning process supported by a relative movement and very highly concentrated solutions of these agents must be used and the cleaning process must be supported by a relative movement between the workpiece to be cleaned and the cleaning liquid.
  • CHC chlorinated hydrocarbons
  • the relative movement between the workpiece and the cleaning liquid is achieved in that the workpieces are sprayed by means of pivotable arms, specifically with a high exit velocity of the treatment liquid.
  • the workpieces are sprayed with the treatment liquid and the cleaning effect is a combination of a mechanical detachment of the dirt particles and a chemical effect.
  • the emulsification of the fats and oils, caused by high discharge speeds, has a disadvantageous effect on the bath condition .
  • the metallic workpieces were removed from the bath or the spraying device and then by means of heated circulating air by evaporation with the help the natural heat of the parts or dried by blowing off or by means of a convection heater.
  • the cleaning agents used can only be used in a certain temperature range. If, for example, a cleaning bath is at too high a temperature (close to 100 ° C), the cleaning agents will be chemically changed and their cleaning effect will deteriorate considerably. On the other hand, if the cleaning bath is not warm enough (below the cloud point or just above it), the cleaning effect also diminishes because the washing activities are no longer adequately thermally supported. The higher viscosity of the greasing complicates the chemical washing process.
  • a method for cleaning office machines and similar mechanical devices is known from document DD-A-91 177. Afterwards, the office machines mentioned are to be cleaned in a bath in which bubble columns rise, which are formed by a pulsating gas flow.
  • a cleaning device for hospital equipment is known from document FR-A-1 410 251, in which cleaning fluid is moved by means of compressed air by spraying and the like.
  • Document DE-A-37 15 332 discloses a method and a device for cleaning workpieces, in which the workpieces are also placed in an immersion bath into which air or another gas is blown. The dirt particles carried along by the gas bubbles are separated by means of an overflow at the upper edge of the bath.
  • a method for removing material is known.
  • the known method is used to process nuclear fissile material.
  • a nuclear fuel sleeve made of stainless steel, which is filled with nuclear fuel materials and fission products, is first cut into parts 25.4 or 50.8 mm long chopped.
  • the chopped parts are then treated in an acid solvent in a closed tank.
  • the acid dissolves the nuclear fuel materials and fission products out of the casings and leaves empty nuclear fuel casings.
  • the acid is heated up to its boiling point of 100 ° C.
  • An underpressure is now set in pulses, which is approximately 200 mbar below atmospheric pressure.
  • the invention is therefore based on the object of developing a method and a device of the type mentioned in such a way that the above disadvantages are avoided and that the cleaning effect of metallic workpieces is improved overall.
  • the procedure according to the invention namely causes "negative pressure cooking", i.e. boiling of the immersion bath already at a temperature which is significantly below the temperature at which the immersion bath would boil under ambient pressure.
  • the vapor bubbles are not only generated at the bottom of the wash tank as in known methods, they are also generated at every location of the immersion bath, i.e. also within blind holes, scooping areas and the like, which remain unreached in conventional immersion baths with injected air bubbles.
  • temperatures at the immersion bath can be used which are clearly below the boiling temperature at ambient pressure, for example 100 ° C. It is therefore also possible to use treatment liquids whose chemical treatment additives only have their optimum effect at temperatures significantly below 100 ° C and therefore could not be used in boiling treatment baths in the conventional procedure, because the additives mentioned adversely change their chemical properties at 100 ° C .
  • the method according to the invention thus opens up a completely new spectrum of treatment options because treatment media can now also be used which could not previously be used for the reasons mentioned.
  • the method according to the invention can also be used particularly advantageously in the case of stacked or bulk goods which could not be adequately agitated with known methods and devices for injecting air bubbles into the treatment bath, because here too the air bubbles flow past the large number of workpieces. Therefore, in most applications, no tricks are required, for example rotating drums in the immersion bath, in which a bulk material is accommodated in order to expose it to air bubble agitation with regard to all bulk material workpieces (e.g. screws and the like).
  • the negative pressure is set so that it corresponds to the saturation vapor pressure of the wash liquid of the immersion bath at the temperature minus at least the hydrostatic pressure at the bottom of the wash tank.
  • This measure has the advantage that the entire immersion bath is brought to a boil, even if the water column in the wash tank is relatively high.
  • a gas is blown into the immersion bath during steps d) and e).
  • the injected serves as a purge gas for a vacuum pump connected to the wash tank, which thus sucks an air / steam mixture out of the wash tank, the air component being passed through the vacuum pump and the steam fraction being able to be condensed out, as will be explained below.
  • the gas injection has the advantage that an additional agitation can be achieved, which leads to an increased treatment effect in a conventional manner.
  • the gas is therefore blown in from the bottom of the wash tank in such a way that gas bubbles flow around the workpieces.
  • the air / steam mixture is passed through a condenser, the washing liquid condensing out in the condenser being further preferably returned to a liquid tank.
  • This measure has the advantage that thickening or salting out of the washing liquid is avoided, which would occur if steam was always removed from the treatment bath while the dissolved treatment substances remain in the bath. By recycling the condensed washing liquid, this effect is avoided, however, so that the method according to the invention can also be used independently in long-term operation, ie without refilling washing liquids.
  • a rinsing liquid or alternatively a cleaning liquid is used as the washing liquid.
  • the cleaning agent is water, to which a gentle, fat-dissolving cleaning agent is added, which does not undergo chemical reactions with the surface of the workpieces and / or does not support such chemical reactions.
  • This measure has the advantage that no residues of the cleaning agent remain on the surface of the workpieces after washing processes.
  • the cleaning agent is neutral to slightly alkaline.
  • this measure has the advantage that metals or metal alloys are not attacked by aqueous media in these pH ranges and that such media are environmentally neutral and harmless to the people who handle the media.
  • steps b) -g) are carried out several times in succession with the same or different washing liquids.
  • This measure has the advantage of very great flexibility, because only rinsing processes, only cleaning processes or combined cleaning or rinsing processes can be carried out in succession.
  • a fully desalinated water is used as the rinsing liquid and this is mixed with a detergent after step g) and is used as a cleaning liquid for a further subsequent process implementation.
  • This measure has the advantage that even a "used" rinsing bath can still be used subsequently as a cleaning bath, with demineralized water being particularly suitable as a starting substance for a cleaning liquid.
  • the immersion bath is circulated during step e) and cleaned outside the wash tank.
  • This measure has the advantage that long-term operation can be guaranteed without the need to supply and remove treatment fluids.
  • the immersion bath is mechanically agitated during step e).
  • This measure also has the known advantage that the treatment effect is increased if, in addition to the existing chemical effects and the particle removal by means of steam bubbles, a mechanical action is also exerted on the surface of the workpieces.
  • the workpieces are first flushed with a pressure-free gush of the washing liquid throughout step b) for a period of between 1 min and 10 min, the gush having a flow rate between 100 m3 / h and 100 m3 / h per m2 of workpiece surface and the washing liquid is continuously drained from the wash tank via an outlet, while the outlet is then closed until the wash tank is filled to an overflow by the surge.
  • This measure has the advantage that in the very critical first phase of the treatment, e.g. of the cleaning process, by rinsing the workpieces with an unpressurized surge of a very large flow rate, the workpieces are already treated or cleaned to a very large extent, with the result that e.g. the subsequent cleaning steps can start with a considerably clean workpiece than is the case with the conventional procedure.
  • the pressure-free gush pouring over the workpieces with a very high flow rate also penetrates into inaccessible areas of the workpieces, forms vortices there and also takes dirt particles from there. This cannot be achieved with conventional devices in which thin liquid jets are directed onto the workpiece under high pressure, because there, on the one hand, only punctiform areas of the workpiece surface can be applied and, on the other hand, as already mentioned, inside areas are inaccessible.
  • the above-mentioned procedure has the advantage that the workpieces are rinsed for a long time even before the cleaning bath is let in, that is to say during a time when the air is injected or steam bubbles are generated would have no effect.
  • the workpieces are washed over during step g), preferably covering the entire area by means of the pressure-free surge of the washing liquid mentioned above and a flow rate which corresponds to 80% to 100% of the flow rate mentioned.
  • This measure has the advantage that the workpieces are never exposed to the outside air flowing in when the immersion bath is drained, which, given the high temperature at which the workpieces are located, would immediately lead to the appearance of corrosion and the like, since the workpieces are at this time are highly active on their surface.
  • a negative pressure preferably between 60 mbar and 350 mbar, is set for a period of 3 minutes and 10 minutes in the wash tank.
  • This measure has the advantage that the workpieces can be dried in the same wash tank by means of negative pressure.
  • the warm workpieces, which at this time are at the temperature of the immersion bath, that is to say at a temperature of, for example, 85 ° C., have in general stored enough inherent heat to evaporate the residues of treatment liquid still adhering to them. If a vacuum is generated in the wash tank at this time, the evaporating liquid components are removed and the workpieces are completely dry before the wash tank is opened again and the workpieces come into contact with the ambient air.
  • a device 10 shown in FIG. 1 has a wash tank 12, a first tank 14 for a first treatment liquid, a second tank 16 for a second treatment liquid, a vacuum station 18, a filter device 20 and a device 22 for injecting a gas into the wash tank 12 on.
  • the wash tank 12 is circular in cross-section and closed at its top with a lid 26.
  • a holding device 28 which is provided for receiving a batch of workpieces 30.
  • the holding device 28 can be inserted into or removed from the wash tank 12 from above in the vertical direction with the lid 26 open.
  • the workpieces 30 are preferably metallic workpieces, i.e. Conventional machine parts, which should preferably be subjected to heat treatment, for example nitro carburizing, at a later point in time.
  • the workpieces 30 therefore have design-related cavities, bores and the like, which can be open upwards, downwards or to the side.
  • a drum 32 which is provided with a horizontal shaft 34, is held in the holding device 28.
  • the shaft 34 extends laterally through the wall of the wash tank 12 and is driven outside of the wash tank 12 by a drive 36.
  • the drum 32 is used to hold bulk material, not shown here.
  • the drum 32 is designed such that it is provided with openings on its circumference so that liquid and gas bubbles can pass through it while the bulk material contained in the drum 32 is retained.
  • the wash tank 12 is provided with an overflow 38 at its upper edge.
  • the overflow 38 on the wash tank 12 is shown as an overflow running around the outside.
  • a preferred embodiment of the invention is characterized in that the overflow runs on the inside of the wash tank 12. In this way, process sequences are moved into the interior of the wash tank 12, which is advantageous with regard to vacuum applications.
  • the overflow 38 is connected on the one hand via a line 40 to the second tank 16, which in the exemplary embodiment shown contains a cleaning liquid 42. Furthermore, the overflow is connected via a line 48 to the first tank 14, which contains a rinsing liquid 47 in the exemplary embodiment shown.
  • the lines 40 and 48 are provided with valves in order to be able to establish or block the connection between the overflow 38 and the tanks 14 and 16, as will be explained in detail below.
  • the second tank 16 containing the cleaning liquid 42 is connected via a line 41 to the suction side of a pump 43.
  • the pump 43 is connected on the output side via a line 44 to a pipe socket 46 which is arranged in the bottom of the wash tank 12.
  • Corresponding valves are also provided between tank 16 and pump 43 or pump 43 and pipe socket 46, as will be explained below.
  • the pump 43 is also connected on its suction side via a line 45 to the first tank 14 containing the rinsing liquid 47.
  • the tanks 14 and 16 are each provided with a heater 49 in the area of their bottom.
  • the tank 16 is provided with a laterally arranged pre-separator 50 which is connected to the actual interior of the tank 16 via an overflow.
  • the pre-separator 50 is also connected to the tank 16 via a line (not shown) and a pump, so that liquid can be pumped into the tank 16 by the pre-separator 50.
  • the tanks 14 and 16 are provided with an overflow weir so that floating dirt of the liquids 42 and 47 get into the pre-separator 50.
  • a skimmer again runs in the pre-separator 50 in order to collect the dirt and then to be able to remove it.
  • the pre-separator 50 is also connected to the filter device 20, which in turn has a filter 55 and an oil separator 54.
  • the filter device 20 is not absolutely necessary, it can also be connected.
  • the filter 55 serves to separate solids from the liquid coming from the pre-separator 50.
  • the oil separator 54 has the purpose of separating oily phases from this liquid, wherein the separated oil phase can be removed via an oil extraction 57 and brought to a disposal point. Liquid leaving filter 55 can be returned to tank 16.
  • the vacuum station 18 has a vacuum pump 70 which is connected to the interior of the wash tank 12 via a line 71.
  • the line 71 preferably opens into the wash tank 12 just below the overflow 38.
  • the vacuum pump 70 On the pressure side of the vacuum pump 70, it is connected to a cold trap 72 and a collector 73. There is also a valve in line 71, as will be explained later.
  • the wash tank 12 can be closed in a vacuum-tight manner in the region of the cover 26 or the overflow 28.
  • the device 22 for injecting a gas into the wash tank 12 has a pressure container 60 in which a gas under pressure is stored.
  • the pressure vessel 60 can in turn be connected to a compressor, not shown in FIG. 1. It is also possible to use a blower at this point.
  • the gas processed in device 22 is preferably air, but a non-reactive protective gas can also be used. It is also possible to design the device 22 so that the gas is warmed up before it is fed to the wash tank 12.
  • the pressure vessel 60 is connected by means of a line 61, in which corresponding pressure control or pressure reducing valves are arranged, to a nozzle 62 which extends through the wall of the wash tank 12. From there, the line 61 leads to a plate-shaped hollow body 63 which is arranged in the region of the bottom of the interior of the wash tank 12.
  • the plate-shaped hollow body 63 the plate plane of which extends approximately horizontally, preferably fills the inner cross section of the wash tank 12 as completely as possible in the region of the floor.
  • the aim should be that the dimensions of the hollow body 63, in vertical view, are approximately the same size as the dimensions of the holding device 28.
  • the plate-shaped hollow body 63 can be constructed from stainless steel sheets, the stainless steel sheet forming the upper plate surface being provided with openings 65.
  • the openings 65 consist of bores which have a diameter of approximately 1 mm and are arranged at a distance of preferably 25 mm from one another.
  • a porous ceramic can also be used, which encloses an air distributor pipe and through whose pores the air flows.
  • the device 10 shown in FIG. 1 also has an electronic control unit 75, via the inputs 76 of which process parameters can be entered, while the outputs 77 control the units of the device 10, in particular the numerous valves and pumps.
  • the cover 26 of the wash tank 12 is opened (not shown) in order to use a crane or the like to move the holder 28 with the workpieces 30 into the wash tank 12 from above.
  • the wash tank 12 is closed again by closing the lid 26.
  • the closure does not yet have to be vacuum-tight, but it should at least protect against splashing water.
  • the heater 49 in the second tank 16 is initially set with the cleaning liquid 42 in preparation for carrying out the method, and in parallel the heater 49 in the first tank 14 is also set with the washing liquid 47, provided a rinsing process is desired.
  • the cleaning liquid 42 and optionally the rinsing liquid 47 are heated to a temperature between 50 ° C. and 90 ° C., preferably in the range between 80 ° C. and 90 ° C. This is a temperature at which cleaning agents and detergents (if they are added) have their optimal working range, since the agents mentioned chemically change at even higher temperatures and the cleaning or rinsing effects decrease at lower temperatures.
  • the control unit 75 opens the necessary valves.
  • a valve 41a in the line 41 is opened, which connects the second tank 16 to the suction side of the pump 43.
  • a valve 51a is opened in the line 51, which connects the pressure side of the pump 43 to the surge shower 52.
  • a valve 67a in line 67 is opened, which connects line pipe 65, which acts as a drain, of wash tank 12 to second tank 16 via line 66.
  • a circuit of cleaning liquid 42 is established, which leads from the second tank 16 via the valve 41a, the line 41, the pump 43, the line 51, the valve 51a to the surge shower 52.
  • the delivery rate of the pump 43 and the flow cross sections of the valves 41a and 51a are dimensioned via the electronic control unit 75 such that a pressure-free surge 80 of cleaning liquid 42 emerges from the surge shower 52, the flow rate of which is in the range between 100 m3 / h and 300 m3 / h per m2 surface of the workpieces 30 is set.
  • the surge 80 thus flushes the workpieces 30 without pressure and reaches the second tank 16 again via the pipe socket 65 acting as a drain, the lines 66 and 67 and the opened valve 67a.
  • the workpieces 30 are pre-cleaned by the unpressurized surge 80 because the surge 80 entrains and removes adhering dirt, in particular pigment dirt, but also greases.
  • the cleaning liquid 42 preferably consists of an aqueous solution of a non-foaming neutral cleaner with temporary corrosion protection.
  • a neutral cleaner has a relatively weak oil emulsifying effect, but is absolutely environmentally friendly and does not attack the goods to be cleaned, nor do people who handle this liquid are affected in any way.
  • the weakly alkaline temporary corrosion protection remains as a thin protective layer on the workpieces and can be completely evaporated at temperatures above 300 ° C.
  • the method step explained above with reference to FIG. 2 is carried out for a period of preferably between one minute and 10 minutes.
  • control unit 75 switches over to a next method step, which is illustrated in FIG. 3.
  • an immersion bath 83 is formed in the wash tank 12, the level 85 of which rises continuously, as indicated by an arrow 86.
  • the wash tank 12 is thus continuously filled with a warm cleaning immersion bath 83 and this process step continues until a fill level indicator (not shown) detects that the liquid level 85 has reached the overflow 38. As soon as this is the case, the present method step is ended.
  • FIG. 4 shows the next process step in which the bath 83 is circulated and agitated.
  • connection between the second tank 16 and the surge shower 52 is initially maintained but, for example by reducing the delivery capacity of the pump 43, for example by 30% to 80% reduced, so that only a much smaller surge 80 'emerges from the surge shower 52.
  • the control unit 75 now opens a valve 40a in the line 40 between the overflow 38 and the second tank 16, so that the cleaning liquid 42 flowing over the overflow 38 can flow out into the second tank 16.
  • valve 51a in the line 51 to the surge shower 52 can alternatively be closed and a connecting valve 51b can be opened, which connects the pressure side of the pump 53 to the bottom of the wash tank 12.
  • control unit 75 actuates the device 22 for injecting gas by opening a valve 61a in the line 61 between the pressure vessel 60 and the plate-shaped hollow body 63.
  • the gas or the air which emerge from the plate-shaped hollow body 63 are there under a pressure which in the area of the openings 65 is slightly above the ambient pressure prevailing there.
  • the compressed air exits through the numerous openings 65 as small gas beads from the plate-shaped Hollow bodies 63, which then flow rapidly upwards to the overflow 38 due to the pressing pressure and their buoyancy.
  • the air bubbles flowing out of the openings 65 do not run through the numerous impingement points of the holding device 28 or the workpieces 30 accommodated therein in a straight line direction, but in a serpentine, partially swirled path.
  • the air bubbles also pass through the drum 32, so that the bulk material received there is also pearled around when the drum 32 rotates.
  • the valve 61a can either be kept open continuously by the control device 75, the intensity of the agitation being able to be influenced by the air flow. Alternatively, however, it is also possible to alternately open and close the valve 61a in a predetermined manner, so that pulsating pressure surges are used. In this way, for example, the compressed air can be briefly pressed into the wash tank 10 at 5-10 bar at intervals of approximately 10-15 seconds.
  • non-foaming neutral cleaner ensures that no excessive foam is formed even when being intensively blown into the wash tank 12.
  • the cleaning liquid 42 is at working temperature, the workpieces 30 are degreased by means of the detergent substances in the detergent, for example anionic surfactants, i.e. cleaned of adhering lubricating oils and the like.
  • the amount of circulated liquid which is supplied by the pump 43 in this process step can also be adjusted depending on the degree of contamination of the workpieces 30.
  • the delivery rate of the pump 43 can also be changed over the course of this method step, for example by working first with a higher throughput and then with a lower throughput.
  • the method step explained above with reference to FIG. 4 is preferably carried out for a period between 3 minutes and 15 minutes.
  • control unit 75 switches to the next method step, which is explained with reference to FIG. 5.
  • control unit 75 switches the pump 43 back to a delivery rate which corresponds entirely or almost to the delivery rate of the method step explained with reference to FIG. 3.
  • a surge 80 now emerges from the surge shower 52, the flow rate of which is between 100 m3 / h and 300 m3 / h.
  • the valve 67a in the line 67 is opened again, so that the bath 83 runs out of the wash tank 12, as indicated by the arrow 86 'pointing downward on the liquid level 85 in FIG. 5.
  • the continuous pressure-free flushing of the workpieces 30 in the method step illustrated in FIG. 5 has the following meaning: If, by draining the bath 83, the liquid level 85 drops, it can happen that dirt particles which float during emptying settle on the workpieces 30 when the liquid level 85 passes through these workpieces. However, this is prevented by constantly supplying fresh, ie cleaned, cleaning liquid 42 from above, namely from the surge shower 52, because the workpieces 30 are then continuously rinsed even when the bath 83 is drained.
  • switching on the unpressurized surge 80 has the meaning that the workpieces 30 do not come into contact with ambient air, or almost not.
  • an air supply (not shown) must be made possible in the interior of the wash tank 12 so that the bath 83 can run off.
  • this supplied fresh air could cause chemical reactions on the surfaces of the workpieces 30 that are highly active at this time, which is undesirable.
  • the control unit 75 switches over to the next method step, which is shown in FIG. 6.
  • the cover 26 of the wash tank 12 must be closed in a pressure-tight manner.
  • the control unit 75 now opens a valve 71a in the line 71 between the interior of the wash tank 12 and the vacuum pump 70. At the same time, the vacuum pump 70 is switched on.
  • the workpieces 30 at this time have the temperature of the bath 83, i.e. are at a temperature of, for example, 80 ° C and 90 ° C.
  • the vacuum pump 70 now generates a vacuum in the interior of the wash tank 12. At about 800 mbar, the evaporation of the residual liquid begins on the workpieces 30 and the water vapor is, as indicated in FIG. 6 with arrows 90, via the line 71 sucked off.
  • the vacuum pump 70 now reduces the pressure in the wash tank 12 to 200-300 mbar, which corresponds to the vapor pressure at a water temperature of 60 ° C - 80 ° C.
  • the liquid still on the workpieces 30 consequently evaporates, the evaporation process taking place more quickly on flat surfaces than in the area of bores, cavities or so-called scooping surfaces, ie depressions of the workpieces 30 opening upwards.
  • the drying process is maintained for a period of between 3 minutes and 10 minutes. As soon as the last liquid has evaporated from the workpieces 30, the pressure in the interior of the wash tank 12 drops suddenly, for example to 70-80 mbar, because there is no longer any liquid to evaporate.
  • the drying process is ended by the control unit 75 by means of a suitable time control or, if appropriate, by a pressure sensor (not shown) which registers and reports this pressure drop.
  • a treatment step with a further treatment liquid can now follow or even before the drying process, for example rinsing the workpieces 30 with the rinsing liquid 47 contained in the first tank 14 same, so that in this respect reference can be made to the description of FIGS. 2-5.
  • the device 10 operates completely independently, i.e. no need to add or remove treatment fluids during operation.
  • demineralized water is used as the basis for the treatment liquids.
  • the fully demineralized water can initially be used as a rinsing liquid 47, because this prevents salt stains from forming on the workpieces after the rinsing during the drying process (FIG. 6), which interfere with the subsequent heat treatment, especially with nitro carburizing.
  • the rinsing liquid 47 can be prepared by adding suitable cleaning agents even when it is no longer usable as a rinsing liquid and can be used as a cleaning liquid 42 for subsequent washing processes. In this way, too, extreme use of the liquids used is possible without having to refill new liquids.
  • the line 71 'between the vacuum pump 70 and the wash tank 12 is expediently connected to the cover 26.
  • the vacuum pump 70 is switched on via the control device 75 and at the same time the valve 71a 'in the line 71' is opened.
  • the vacuum pump 70 Since in this process state the bath 83 is filled up to the overflow 38, the vacuum pump 70 generates a strong negative pressure in the remaining small air space 91 in the area of the surge shower 52.
  • the negative pressure is now set so that the bath 83 begins to boil despite the temperature of 100 ° C. being below the boiling point of water at atmospheric pressure.
  • the vacuum must be set so that it corresponds to the saturation vapor pressure of water at the respective lower temperature and in addition the hydrostatic pressure in the wash tank 12 is taken into account, i.e. the height of the liquid column inside the tank.
  • the bath 83 begins to boil, even though its temperature is below 100 ° C.
  • Boiling the bath 83 has the result that steam bubbles form at every point in the bath 83, that is to say not only on the surfaces of the workpieces 30, but rather also in cavities, bores, blind bores, scoops and the like.
  • the vapor bubbles thus also arise at those points on the workpieces that cannot be reached by air bubbles that were generated by the device 22 for injecting gas.
  • the rising vapor bubbles also take dirt particles with them, with the result that blind bores, scoops and the like can also be cleaned by taking dirt particles with them.
  • the intensity of the cooking can be varied by adjusting the negative pressure appropriately via the vacuum pump 70.
  • the dirt carried up by the steam bubbles during the vacuum cooking accumulates on the surface of the bath and can be removed from the wash tank 12 in the manner already described via the overflow 38 after the cooking phase has ended.
  • the cooking of the bath 83 can be provided both during cleaning and during rinsing, because the chemical cleaning process is supported during cleaning, while the difficult to access spaces can be rinsed out in the manner mentioned during rinsing. It goes without saying that the Vacuum cooking a circulation and / or agitation of the bath 83 is possible.
  • the suction side of the pump 43 is connected to the pipe socket 65 via a line 95, a valve 95a being arranged in the line 95.
  • the corresponding treatment liquid can now be suctioned off at the pipe socket 65 despite the negative pressure prevailing in the wash tank 12 and added again via the surge shower 52. It is understood that in this case as well, suitable measures can be used to continuously clean the respective treatment liquid (not shown).
  • a condenser 92 is arranged in the line 71 'because the vacuum pump 70 sucks off the vapor of the respective treatment liquid in the manner described and this vapor should not get into the vacuum pump 70. For this reason, an appropriate air supply will ensure that the vacuum pump 70 always draws in a mixture of air and steam, the steam then precipitating in the condenser 92 and being supplied to the respective tanks for the treatment liquids. This has the advantage that the treatment liquids do not thicken, i.e. Salt up by keeping the water loss as low as possible.
  • the amount of steam for the vacuum pump 70 is reduced by the amount of condensed steam, so that the vacuum pump 70 can be economically small.
  • the vacuum pump 70 since the vacuum pump 70, as already mentioned, can only pump out saturated air, the air required by the vacuum pump 70 becomes preferably supplied via the hollow body 63. You can measure the air required by the vacuum pump 70 so that it just corresponds to the amount of flotation air.
  • negative pressure cooking can be used permanently in the immersion process, with the result that negative pressure is used during the entire cleaning or rinsing time.
  • vacuum cooking in the immersion process can also be used for floating, i.e. each for part of the cleaning or rinsing time.
  • the fresh air can be supplied via the hollow body 63 or also via the surge shower 52.
  • the step of vacuum cooking can last from 1 min to 20 min.
  • FIG. 8 shows a variant of a device 100, only one wash tank 104 being shown here, which largely corresponds to the wash tank 12 of the device 10 according to FIGS. 1-7. Therefore, essentially only the deviating elements will be described below and in Fig. 8 the same reference numerals have been used for corresponding components.
  • the wash tank 104 is also designed as a container which is approximately circular in cross section and is provided on its bottom with a pipe socket 105, which here is intended to represent the pipe socket 46 and 65 of the wash tank 12 according to FIGS. 1-7.
  • the wash tank 100 also has a drum 106 which can be rotated about a horizontal axis 108 via a drive 107. Hexagonal workpieces 110, 110 ' « are contained in the drum 106.
  • the wash tank 104 is provided with an overflow 111, which is connected both to the second tank 16, which contains the cleaning liquid 42, and to the first tank 14, which contains the rinsing liquid 47.
  • the wash tank 104 is connected to the vacuum station 18 via a side connection.
  • a connection piece 114 can also be present in the cover 112.
  • the surge shower 113 is arranged on the inside of the cover 112 and, in the manner already explained several times, serves to flush the workpieces 110 received in the interior of the wash tank 104 with a surge without pressure.
  • the wash tank 104 is filled with the cleaning liquid 42 up to the overflow 111.
  • the wash tank 104 there is a holder 118 which carries various other workpieces 120.
  • a device 122 for injecting gas (in the exemplary embodiment shown in FIG. 8, the gas is nitrogen) consists of a hollow body 126 which has a bottom part 130 and a side part 131.
  • the side part 131 extends on one side of the holder 118 and surrounds it at least over a large part of its circumference.
  • the hollow body 126 is again provided, as described above, on the side facing the holder 118 with numerous openings, which are designed as nozzles 128 in the exemplary embodiment shown in FIG. 8.
  • the nitrogen coming from the pressure vessel 60 emerges from the nozzles 128 in the form of fine beads or bubbles 127.
  • the bubbles 127 flow completely around the workpieces 120, as is indicated, for example, by an arrow 136.
  • Providing the side part 131 also generates a laterally directed bubble flow, as is indicated, for example, by the arrow 139. This creates an upwardly curved line because the bubbles emerging from the side nozzles 128 soon tend to rise due to the buoyancy.
  • the pressure of the gas bubbles 127 emerging from the lateral nozzles 128 is adjusted during a cleaning process so that they reach at least approximately the longitudinal central axis of the wash tank 104, i.e. seen in the section of Fig. 8, as indicated by the arrow 138, extend at least over half the width in the lateral direction.
  • the side part 131 which at least partially surrounds the holder 118, ensures that rapid cleaning is also possible with workpieces 120 of complex shape.
  • the hollow body 126 can be subdivided into a top section 134, a middle section 135 and a bottom section via separating slides 132 and 133, so that, depending on the type of goods received in the wash tank 104, gas 141 only in the area of the bottom or also one or more one above the other arranged side areas is pressed.
  • the rising gas beads 127 also generate a secondary flow, as indicated by an arrow 137.
  • the liquid received in the wash tank 104 then flows in a circulating circuit.
  • FIGS. 9 and 10 show yet another exemplary embodiment of devices according to the invention, as can be used to carry out the method according to the invention.
  • a device for cleaning metallic workpieces in particular which comprises a wash tank 151.
  • a holder 152 for workpieces is in turn provided in the wash tank 151.
  • the arrangement is, however, in contrast to the arrangements of FIGS. 1-8, so that the holder 152 can be removed from the wash tank 151 in the horizontal direction via a loading door 153.
  • the loading door 153 is preferably displaceable in the vertical direction, as indicated by an arrow.
  • liquids and gases can be supplied and discharged via lines 154, 155 and 156 in the manner already explained in detail, with no differences in the course of the method.
  • surge shower 157 which also delivers a pressure-free water surge in the device 150, even if the area of action is greater in the horizontal construction shown in FIGS. 9 and 10 than in the vertical arrangement in FIGS. 1-8.
  • the wash tank 151 is arranged on a frame 160, which at the same time holds the tanks 161, 162 for the treatment liquids.
  • the tanks 161, 162 are again provided for the cleaning liquid and the rinsing liquid.
  • an additional heater can be provided in the wash tank 12 in order to be able to work with cooler parts or to be able to dry even with large amounts of water remaining by the additional heater applying the required additional heat of vaporization.
  • Ultrasonic generators can also be provided in the wash tank 12 in a manner known per se, in order to cope with extreme physical Forces to cause cavitation in the treatment liquid. In this way it is possible to be able to remove inorganic substances which are difficult to adhere to the workpieces, as well as impurities which have worked into the surface of the workpieces.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (17)

  1. Procédé pour le lavage de pièces métalliques (30 ; 110, 120) pour un traitement thermique consécutif au lavage, le procédé comportant les étapes suivantes :
    a) introduction des pièces (30 ; 110, 120) dans une cuve de lavage (12 ; 104 ; 151) ayant une capacité de 1 à 10 m³ ;
    b) remplissage avec un liquide de lavage (42, 47) en un bain d'immersion (83) entourant pratiquement les pièces (30 ; 110, 120) à une température comprise entre 50 et 90°C ;
    c) verrouillage étanche à la pression de la cuve de lavage (12 ; 104 ; 151), de telle sorte qu'il reste un volume d'air (91) au-dessus du bain d'immersion (83) ;
    d) évacuation du volume d'air (91) d'un mélange d'air et de vapeur jusqu'à obtenir une dépression inférieure à la pression de vapeur saturante du liquide de lavage (42, 47) du bain d'immersion (83) à cette température ;
    e) maintien de la dépression pendant une durée comprise entre 1 et 20 minutes, le bain d'immersion (83) étant en ébullition ;
    f) mise en détente du volume d'air (91) à la pression ambiante ; et
    g) évacuation du bain d'immersion (83).
  2. Procédé selon la revendication 1, caractérisé en ce que la dépression est réglée de telle façon qu'elle corresponde à la pression de vapeur saturante du liquide de lavage (42, 47) du bain d'immersion (83) à cette température, diminuée au moins de la pression hydrostatique au fond de la cuve de lavage (12 ; 104 ; 151).
  3. Procédé selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que, au cours des étapes d) et e), un gaz est insufflé dans le bain d'immersion (83).
  4. Procédé selon la revendication 3, caractérisé en ce que le gaz est insufflé par le fond de la cuve de lavage (12 ; 104 ; 151), de façon à ce que les pièces (30 ; 110, 120) se trouvent dans un flux de bulles de gaz (127).
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le mélange d'air et de vapeur passe par un condenseur (92).
  6. Procédé selon la revendication 5, caractérisé en ce que le liquide de lavage (42, 47) condensé dans le condenseur (92) est renvoyé dans un réservoir de liquide (14, 16).
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le liquide de lavage mis en oeuvre est un liquide de rinçage (42).
  8. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le liquide de lavage mis en oeuvre est un liquide de nettoyage (47).
  9. Procédé selon la revendication 8, caractérisé en ce que le liquide de nettoyage (47) est de l'eau à laquelle a été ajouté un produit de nettoyage doux, dissolvant les graisses, ne provoquant pas de réaction chimique à la surface des pièces (30 ; 110, 120) et/ou n'entretenant pas de telles réactions chimiques.
  10. Procédé selon la revendication 9, caractérisé en ce que le produit de nettoyage est neutre ou légèrement alcalin.
  11. Procédé selon l'une ou l'autre des revendications 1 et 10, caractérisé en ce que les étapes b) à g) sont répétées plusieurs fois successivement avec des liquides de lavage (42, 47) identiques ou différents.
  12. Procédé selon l'une quelconque des revendications 7, 8 et 11, caractérisé en ce que le liquide de rinçage (42) utilisé est de l'eau totalement déminéralisée et en ce que celle-ci est remplacée, après l'étape g), par un produit de lavage, puis réutilisée pour la suite du procédé, en tant que liquide de nettoyage.
  13. Procédé selon l'une ou l'autre des revendications 1 à 12, caractérisé en ce que, au cours de l'étape e), le bain d'immersion (83) est mis en circulation et nettoyé en dehors de la cuve de lavage (12 ; 104 ; 151).
  14. Procédé selon l'une quelconque des revendications 1 à 13, caractérisé en ce que, au cours de l'étape e), le bain d'immersion (83) est soumis à une agitation mécanique.
  15. Procédé selon l'une quelconque des revendications 1 à 14, caractérisé en ce que les pièces (30 ; 110, 120), lors de l'étape b), sont d'abord aspergées, pendant une durée comprise en 1 et 10 minutes, par un jet sans pression (80) de liquide de lavage (42, 47) dispersé sur toute leur surface, le jet (80) ayant un débit compris entre 100 et 300 m³/h par m² de surface de pièce, le liquide de lavage (42, 47) étant évacué en continu de la cuve de lavage (12 ; 104 ; 151), par une évacuation (65 ; 105), l'évacuation (65 ; 105) étant fermée tant que la cuve de lavage (12 ; 104 ; 151) n'est pas remplie par le jet (80) jusqu'à un trop plein (38 ; 111).
  16. Procédé selon l'une quelconque des revendications 1 à 15, caractérisé en ce que, au cours de l'étape g), les pièces (30 ; 110, 120) sont aspergées.
  17. Procédé selon l'une quelconque des revendications 1 à 16, caractérisé en ce que, après l'étape g), une dépression, comprise de préférence entre 60 et 350 mbar, est établie dans la cuve de lavage (12 ; 104 ; 151) pendant une durée comprise entre 3 et 10 minutes.
EP92119602A 1991-11-22 1992-11-17 Procédé pour le nettoyage des parts métalliques Expired - Lifetime EP0543322B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4138400 1991-11-22
DE4138400A DE4138400C1 (fr) 1991-11-22 1991-11-22

Publications (2)

Publication Number Publication Date
EP0543322A1 EP0543322A1 (fr) 1993-05-26
EP0543322B1 true EP0543322B1 (fr) 1996-03-13

Family

ID=6445333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92119602A Expired - Lifetime EP0543322B1 (fr) 1991-11-22 1992-11-17 Procédé pour le nettoyage des parts métalliques

Country Status (12)

Country Link
US (1) US5268036B1 (fr)
EP (1) EP0543322B1 (fr)
JP (1) JP3013635B2 (fr)
KR (1) KR960003158B1 (fr)
CN (1) CN1072739A (fr)
AT (1) ATE135268T1 (fr)
BR (1) BR9204610A (fr)
CZ (1) CZ283370B6 (fr)
DE (2) DE4138400C1 (fr)
ES (1) ES2085536T3 (fr)
HU (1) HU210266B (fr)
RU (1) RU2108172C1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020208244A1 (de) 2020-07-01 2022-01-05 Dürr Systems Ag Behandlungsstation, Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102020208247A1 (de) 2020-07-01 2022-01-05 Dürr Systems Ag Behandlungsstation, Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102020208246A1 (de) 2020-07-01 2022-01-05 Dürr Systems Ag Behandlungsstation, Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102021214987A1 (de) 2021-12-23 2023-06-29 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5702535A (en) * 1991-11-05 1997-12-30 Gebhard-Gray Associates Dry cleaning and degreasing system
US5814161A (en) * 1992-11-30 1998-09-29 Massachusetts Institute Of Technology Ceramic mold finishing techniques for removing powder
DE4302415C1 (de) * 1993-01-28 1993-12-09 Christ Caroline Verfahren und Vorrichtung zum Reinigen von Teilen von Kunststoffverarbeitungsmaschinen
FR2702282B1 (fr) * 1993-03-05 1995-06-02 Jacques Caudrelier Procédé et appareil pour le dégraissage d'un câble à fibres optiques.
DE4317862A1 (de) * 1993-05-28 1994-12-01 Aichelin Ind Ofen Verfahren und Vorrichtung zum Reinigen von metallischen Werkstücken
US5863348A (en) * 1993-12-22 1999-01-26 International Business Machines Corporation Programmable method for cleaning semiconductor elements
US6571810B1 (en) * 1994-09-30 2003-06-03 Zymo International, Inc. Parts washing system
US6039059A (en) 1996-09-30 2000-03-21 Verteq, Inc. Wafer cleaning system
NL1009388C2 (nl) * 1998-02-06 1999-08-16 Ht Idee Bv Werkwijze om een product te ontdoen van een op het oppervlak daarvan zich bevindend materiaal.
DE19828581B4 (de) * 1998-06-26 2009-11-26 Meissner, Werner Waschmaschine
US6328810B1 (en) 1999-04-07 2001-12-11 General Electric Company Method for locally removing oxidation and corrosion product from the surface of turbine engine components
US6418942B1 (en) * 2000-03-10 2002-07-16 Donald Gray Solvent and aqueous decompression processing system
DE10036809B4 (de) * 2000-07-28 2004-03-25 Robert Bosch Gmbh Vorrichtung und Verfahren zur Reinigung und/oder Behandlung von Oberflächen
US6645312B2 (en) * 2000-10-18 2003-11-11 Siemens Vdo Automotive Inc. Turbulance and air jet bubbled air intake manifold washer
KR100456527B1 (ko) * 2001-12-11 2004-11-09 삼성전자주식회사 마란고니 효과를 증대시키기 위한 건조 장비 및 건조 방법
US6743300B2 (en) * 2002-01-15 2004-06-01 Donald Gray Multistep single chamber parts proceeding method
US8323420B2 (en) * 2005-06-30 2012-12-04 Lam Research Corporation Method for removing material from semiconductor wafer and apparatus for performing the same
US20050283993A1 (en) * 2004-06-18 2005-12-29 Qunwei Wu Method and apparatus for fluid processing and drying a workpiece
KR101108064B1 (ko) * 2004-12-03 2012-01-31 에스케이케미칼주식회사 전자부품 패키징용 액상 에폭시 수지 조성물
US20070107748A1 (en) * 2005-11-16 2007-05-17 Donald Gray Vacuum cavitational streaming
TWI352628B (en) * 2006-07-21 2011-11-21 Akrion Technologies Inc Nozzle for use in the megasonic cleaning of substr
DE102007016246B4 (de) * 2007-04-04 2019-02-21 Ecoclean Gmbh Verfahren zur Bereitstellung eines Reinigungsmediums und Verfahren und Reinigungsvorrichtung zur Reinigung eines Werkstücks
EP2212906B1 (fr) 2007-10-27 2022-02-16 LPW Reinigungssysteme GmbH Procédé de nucléation cyclique
US7846262B2 (en) * 2007-11-08 2010-12-07 Gray Donald J Aqueous cleaning of liquid residue by etching
US9166139B2 (en) * 2009-05-14 2015-10-20 The Neothermal Energy Company Method for thermally cycling an object including a polarizable material
US8409493B2 (en) * 2009-08-06 2013-04-02 Rolls-Royce Corporation Systems and methods for leaching a material from an object
JP5691540B2 (ja) * 2011-01-18 2015-04-01 三浦工業株式会社 洗浄装置
JP5729678B2 (ja) * 2011-03-18 2015-06-03 三浦工業株式会社 洗浄装置
DE102012006363A1 (de) * 2011-04-01 2012-10-04 Rotorcomp Verdichter Gmbh Luftregler für Kompressoren, insbesondere Schraubenkompressoren
CN102974566A (zh) * 2012-11-15 2013-03-20 上海汇森益发工业炉有限公司 三液真空清洗机
CN103506343A (zh) * 2013-10-16 2014-01-15 中国工程物理研究院激光聚变研究中心 洁净真空罐
CN103878153B (zh) * 2014-04-11 2016-07-06 连云港佑源医药设备制造有限公司 适用于精密器具的低温沸腾精密清洗方法及清洗装置
CN105344634A (zh) * 2015-09-08 2016-02-24 宁国市南方耐磨材料有限公司 一种耐磨钢球清洗装置
CN105383710B (zh) * 2015-11-24 2018-06-05 中国航空工业集团公司沈阳飞机设计研究所 一种飞机表面防腐清洗方法及装置
CN107051958A (zh) * 2017-04-19 2017-08-18 重庆优玛环试医疗设备有限公司 一种立式真空清洗机
US10421124B2 (en) * 2017-09-12 2019-09-24 Desktop Metal, Inc. Debinder for 3D printed objects
DE102019108094A1 (de) 2018-03-28 2019-10-02 Lpw Reinigungssysteme Gmbh Verfahren und Vorrichtung zur Bereitstellung eines Mediums mittels zyklischer Nukleation
CN109174814A (zh) * 2018-11-05 2019-01-11 湖南迪清科技有限公司 一种自动超声盐浴清洗装置
CN111593362A (zh) * 2020-06-03 2020-08-28 含山县大兴金属制品有限公司 一种压铸铝合金工件有机溶剂脱脂装置及方法
WO2022106886A1 (fr) * 2020-11-17 2022-05-27 Martin Ineichen Dispositif et procédé de nettoyage de pièces de fabrication
CN115229187B (zh) * 2021-10-29 2023-07-28 南京尚吉增材制造研究院有限公司 适用于制备多孔金属工艺中去除无机盐造孔剂的设备及去除方法
CN114192780B (zh) * 2021-12-17 2023-08-01 南京尚吉增材制造研究院有限公司 用于多孔金属制备过程中的造孔剂清洗系统、造孔剂清洗方法
CN114733838B (zh) * 2022-06-13 2022-09-02 山东第一医科大学第一附属医院(山东省千佛山医院) 一种内科护理用高效清洁装置

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567820A (en) * 1947-01-13 1951-09-11 Ernest A Messerschmidt Cleaning machine for machine parts and the like
GB805547A (en) * 1955-08-01 1958-12-10 Bendix Aviat Corp Method and apparatus for extracting contaminants from a liquid-permeable body
FR1410251A (fr) * 1964-06-17 1965-09-10 Procédé et dispositif de lavage et de séchage notamment pour seringues
US3460990A (en) * 1964-10-12 1969-08-12 Donald J Barday Method for cleaning objects with solvent
IT1023355B (it) * 1977-01-28 1978-05-10 Fontana Giancarlo Procedimento e apparecchiatura per lavare in particolare frutta e verdura
US4294805A (en) * 1978-08-09 1981-10-13 United Kingdom Atomic Energy Authority Method of leaching the contents of a can
CH637041A5 (en) * 1979-03-13 1983-07-15 Ciba Geigy Ag Plug cleaning device
SU977374A1 (ru) * 1979-10-26 1982-11-30 За витель Способ мойки тары в герметичной камере
DE3300666C3 (de) * 1982-01-26 1998-04-09 Guido Zucchini Waschverfahren für metallhaltige und nicht-metallhaltige Teile wie Kleinteile, mechanische Komponenten und Teile für die elektronische Industrie sowie eine Maschine zur Durchführung dieses Verfahrens
DE8437870U1 (de) * 1984-12-22 1986-02-13 Wache Oberflächentechnik GmbH & Co KG, 2000 Norderstedt Vorrichtung zum Waschen von vorzugsweise metallischen Werkstücken
JPS61221387A (ja) * 1985-03-26 1986-10-01 Akutoronikusu Kk 容器内における表面処理方法と表面処理装置
DE3715332A1 (de) * 1987-05-08 1988-12-01 Bielefeld Maschinenbau Gmbh Verfahren und vorrichtung zum reinigen von werkstuecken
DE3725565A1 (de) * 1987-08-01 1989-02-16 Peter Weil Verfahren und anlage zum entlacken von gegenstaenden mit einem tauchbehaelter mit loesungsmittel
DE3805565A1 (de) * 1988-02-23 1989-08-31 Gut Ges Umweltschonende Tech Verfahren und vorrichtung zum reinigen von verschmutzten teilen
JPH064953Y2 (ja) * 1988-04-25 1994-02-09 株式会社千代田製作所 有機溶剤を用いる洗浄装置
US4931102A (en) * 1988-09-01 1990-06-05 Eaton Corporation Metal cleaning process
DE3930880A1 (de) * 1989-01-11 1990-07-12 Edmund Hirner Verfahren und vorrichtung zum reinigen, insbesondere entfetten verschmutzter teile durch spuelen und/oder bespritzen
JPH0757913B2 (ja) * 1989-10-27 1995-06-21 オリエンタルエンヂニアリング株式会社 脱脂洗浄方法および装置
US5106425A (en) * 1990-10-22 1992-04-21 Baxter International, Inc. Method for maintaining a flammable solvent in a non-flammable environment
US5143103A (en) * 1991-01-04 1992-09-01 International Business Machines Corporation Apparatus for cleaning and drying workpieces

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020208244A1 (de) 2020-07-01 2022-01-05 Dürr Systems Ag Behandlungsstation, Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102020208247A1 (de) 2020-07-01 2022-01-05 Dürr Systems Ag Behandlungsstation, Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102020208246A1 (de) 2020-07-01 2022-01-05 Dürr Systems Ag Behandlungsstation, Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102021214987A1 (de) 2021-12-23 2023-06-29 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken

Also Published As

Publication number Publication date
BR9204610A (pt) 1993-05-25
KR960003158B1 (ko) 1996-03-05
DE59205678D1 (de) 1996-04-18
US5268036A (en) 1993-12-07
DE4138400C1 (fr) 1993-02-18
CN1072739A (zh) 1993-06-02
JPH06264274A (ja) 1994-09-20
HU210266B (en) 1995-03-28
ATE135268T1 (de) 1996-03-15
ES2085536T3 (es) 1996-06-01
CZ283370B6 (cs) 1998-04-15
HU9203643D0 (en) 1993-03-01
KR930010232A (ko) 1993-06-22
CZ344592A3 (en) 1993-09-15
RU2108172C1 (ru) 1998-04-10
EP0543322A1 (fr) 1993-05-26
HUT63789A (en) 1993-10-28
US5268036B1 (en) 1997-08-26
JP3013635B2 (ja) 2000-02-28

Similar Documents

Publication Publication Date Title
EP0543322B1 (fr) Procédé pour le nettoyage des parts métalliques
DE4138432C1 (fr)
EP0302313B1 (fr) Procédé et dispositif pour traiter des objets avec des solvants dans un récipient clos
EP0973620B1 (fr) Procede et dispositif pour nettoyer ou secher des pieces
DE2811017A1 (de) Vorrichtung und verfahren zum reinigen von behaeltern
DE2032824A1 (de) Verfahren und Vorrichtung zur Be handlung einer Flüssigkeit mit zusatzh chen Bestandteilen
EP3165286A1 (fr) Procédé et appareil pour déshuiler et/ou nettoyer des articles de série
DE4345077C2 (de) Vorrichtung zum Reinigen und Entfetten der Oberflächen von Blechen
DE10141633A1 (de) Verfahren und Vorrichtung zum Entkernen wasserlöslicher Gießkerne
DE19637086A1 (de) Automatisch arbeitende Reinigungsanlage für Werkstücke
DE102007063169A1 (de) Verfahren und Anlage zum Bearbeiten bzw. Reinigen von Si-Blöcken
DE3820982A1 (de) Waschgeraet
DE2138159C3 (de) Verfahren und Vorrichtung zum Polieren der Innen- und Außenflächen von Hohlglaskörpern in einem bewegten Polierätzbad, bei dem die Polierflüssigkeit nach erfolgter Einwirkung abfließt
DE4121665C2 (de) Verfahren zur umweltverträglichen sowie wassersparenden Reinigung von Gegenständen von auf der Oberfläche haftenden Ölen und Fetten
DE4446589A1 (de) Verfahren zur Reinigung metallischer Werkstücke
DE4446587A1 (de) Verfahren zur Reinigung metallischer Werkstücke
DE4446588A1 (de) Verfahren zur Reinigung metallischer Werkstücke
DE2722211C2 (de) Verfahren und Vorrichtung zur Beseitigung von Lacken und/oder anderen Auftragsmitteln auf Werkstücken
DE4445147A1 (de) Gerät zum Abscheiden von Öl aus verunreinigtem Wasser
DE19517880A1 (de) Verfahren zum Aufbereiten gebrauchter Wasch- oder Spülflüssigkeit sowie Vorrichtung zur Durchführung des Verfahrens
DE3342954A1 (de) Vorrichtung und verfahren zur rueckgewinnung anhaftender restmengen von behandlungsloesungen an massenteilen in trommeln, gegebenenfalls auch fuer trocknung dieser massenteile
DE4446590A1 (de) Verfahren zur Reinigung metallischer Werkstücke
DE4232183A1 (de) Verfahren und Vorrichtung zur Oberflächenbehandlung von aus einem Tauchbad geführten Festkörpern
DE602005006200T2 (de) Verfahren zum Dekontaminieren von Bleigegenständen
EP2289606A2 (fr) Machine destinée au séchage de pièces usinées après un nettoyage aqueux

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR IT LI NL SE

17P Request for examination filed

Effective date: 19930612

17Q First examination report despatched

Effective date: 19940606

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: AICHELIN GMBH

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR IT LI NL SE

REF Corresponds to:

Ref document number: 135268

Country of ref document: AT

Date of ref document: 19960315

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: TROESCH SCHEIDEGGER WERNER AG

ITF It: translation for a ep patent filed

Owner name: BUGNION S.P.A.

REF Corresponds to:

Ref document number: 59205678

Country of ref document: DE

Date of ref document: 19960418

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2085536

Country of ref document: ES

Kind code of ref document: T3

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: IPSEN INTERNATIONAL GMBH

Effective date: 19961212

NLR1 Nl: opposition has been filed with the epo

Opponent name: IPSEN INTERNATIONAL GMBH

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBO Opposition rejected

Free format text: ORIGINAL CODE: EPIDOS REJO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAE Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOS REFNO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 20030221

NLR2 Nl: decision of opposition

Effective date: 20030221

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20051114

Year of fee payment: 14

Ref country code: CH

Payment date: 20051114

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20051216

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070601

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20070601

BERE Be: lapsed

Owner name: *AICHELIN G.M.B.H.

Effective date: 20061130

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20081114

Year of fee payment: 17

Ref country code: ES

Payment date: 20081121

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20081124

Year of fee payment: 17

Ref country code: SE

Payment date: 20081114

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20081113

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20081220

Year of fee payment: 17

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100601

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20110307

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091118

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110304

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091118