EP0829313A2 - Installation automatique pour le nettoyage de pièces - Google Patents

Installation automatique pour le nettoyage de pièces Download PDF

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Publication number
EP0829313A2
EP0829313A2 EP97115224A EP97115224A EP0829313A2 EP 0829313 A2 EP0829313 A2 EP 0829313A2 EP 97115224 A EP97115224 A EP 97115224A EP 97115224 A EP97115224 A EP 97115224A EP 0829313 A2 EP0829313 A2 EP 0829313A2
Authority
EP
European Patent Office
Prior art keywords
air
steam
approximately
workpieces
workpiece
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.)
Granted
Application number
EP97115224A
Other languages
German (de)
English (en)
Other versions
EP0829313A3 (fr
EP0829313B1 (fr
Inventor
Karl-Heinz Wüller
Otfried Meyer
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.)
Ecoclean GmbH
Original Assignee
Duerr Ecoclean GmbH
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
Application filed by Duerr Ecoclean GmbH filed Critical Duerr Ecoclean GmbH
Publication of EP0829313A2 publication Critical patent/EP0829313A2/fr
Publication of EP0829313A3 publication Critical patent/EP0829313A3/fr
Application granted granted Critical
Publication of EP0829313B1 publication Critical patent/EP0829313B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • 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
    • B08B3/02—Cleaning by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2230/00—Other cleaning aspects applicable to all B08B range
    • B08B2230/01—Cleaning with steam

Definitions

  • Workpieces especially those that have been processed by grinding, drilling, milling, turning, sawing, thread cutting and the like, often require thorough cleaning in order to remove chips, abrasive grains and the like, but above all also residues of processing fluids, such as cutting and cooling oils, or remove other processing residues as completely as possible; a workpiece cleaning, e.g. B. degreasing, but may also be necessary after other treatments.
  • processing fluids such as cutting and cooling oils, or remove other processing residues as completely as possible
  • a workpiece cleaning e.g. B. degreasing, but may also be necessary after other treatments.
  • cleaning has hitherto been carried out almost exclusively by cleaning the workpieces with a cleaning liquid (organic solvents or aqueous cleaning liquids containing surfactants) by spraying and / or dipping and then drying them.
  • a cleaning liquid organic solvents or aqueous cleaning liquids containing surfactants
  • This known system has a channel-like lock chamber, which can be closed at both ends by an inlet-side and an outlet-side lifting gate and in which a roller conveyor extending over the entire length of the lock chamber is arranged, on which the objects to be cleaned are deposited and with which the latter are moved through the lock chamber. Furthermore, this known system has an air circulation system with a fan for conveying air to two annular blown air ducts which are spaced apart in the longitudinal direction of the duct forming the lock chamber and each of which is formed by four straight segments which lead into the interior of the lock chamber protruding channel.
  • the lock chamber is provided with an air suction duct, which is likewise designed in a ring shape and to which two mechanical air filters connected in series are arranged, from which the blower sucks the air again.
  • the workpieces to be cleaned are clocked through the lock chamber using the roller conveyor;
  • the lift gate on the inlet side is first opened, whereupon a first workpiece to be cleaned or a first batch of workpieces to be cleaned is introduced into the lock chamber and placed on the roller conveyor.
  • the lift gate on the inlet side is closed, whereupon the air circuit is put into operation and the workpiece or workpieces are passed through the first annular blown air duct and are stopped in front of the second annular blown air duct. Then the inlet-side lifting gate is opened again, the lock chamber is loaded with the next batch, the inlet-side lifting gate is closed again and the roller conveyor is clocked one step further, the first batch being the second annular blown air duct and the second batch passes the first blown air duct etc.
  • the workpieces to be cleaned must therefore be introduced individually or in batches into the lock chamber, ie this known cleaning system can only work discontinuously;
  • relatively complex workpiece handling devices are required to apply the workpieces to be cleaned through the open inlet-side lifting gate onto the roller conveyor and to remove the cleaned workpieces from the roller conveyor through the open outlet-side lifting gate.
  • a similar cleaning system is known from DE-A-37 34 200, which differs from the cleaning system according to DE-A-34 19 028 in that cleaning is carried out with a high-pressure air jet, generated by a high-pressure fan.
  • the cleaning system resulting from DE-A-34 19 028 is fundamentally not suitable, because blown air jets do not succeed, dried or oily / greasy dirt, as is often typical for machined workpieces, to a sufficient extent of to remove such workpieces.
  • a workpiece cleaning by means of blown air jets naturally has the advantages that the workpieces do not subsequently have to be dried in a complex manner and that it is also not necessary to convey and reprocess large quantities of a cleaning liquid, as is the case with immersion and / or spray cleaning of workpieces using a cleaning liquid.
  • the invention has for its object to use the advantages of cleaning the workpieces by means of air jets in an automatically operating cleaning system, but at the same time to significantly improve the cleaning effect, even when working with blown air jets and not with high-tension air for reasons of energy costs , although in principle the latter would also be conceivable.
  • the basic idea of the invention is now to add a relatively small amount of water vapor to an air jet causing the cleaning so that the air jet hitting a workpiece to be cleaned contains the water at least predominantly in the form of steam. It has been shown that unexpectedly good cleaning results can be achieved if, instead of pure air, an air-water vapor mixture acts on the workpiece to be cleaned, even if the proportion of water vapor in the blown air jet is relatively low. On the one hand, workpieces can even be degreased well, and on the other hand, the workpieces dry quickly after the cleaning process, if only the small amount of steam required to achieve the cleaning process is added to the air jet.
  • an automatically operating cleaning system for removing treatment and / or processing residues from workpieces, which a cleaning station to which a channel is assigned for receiving at least one workpiece to be cleaned, a workpiece transport device for introducing the workpieces to be cleaned into the channel and for removing the cleaned workpieces from the duct and at least one blowing nozzle directed into the interior of the duct and thus onto the workpieces to be cleaned, for applying an air jet, in particular a blowing air jet, to the workpieces, the blowing nozzle having an air conveyor, in particular designed as a fan, for feeding Air to the blowing nozzle with a pressure of in particular at most about 0.5 bar upstream and the channel has an outlet for discharging the used blowing air, the aforementioned object can be constructively according to the present invention solve by providing a steam supply device for introducing water vapor into the blown air jet and a separating device for separating contaminated condensate formed from the steam from the used blown air, the steam supply device and the air conveyor being matched
  • the good cleaning effect that can be achieved with the invention is based, among other things, on the fact that when cleaning with steam, fully demineralized water or its steam hits the workpiece and fully demineralized water is "more aggressive" than normal water, i. H. Dirt absorbs more easily than non-desalinated water; At the same time, cleaning by means of air jets, to which relatively small amounts of water vapor have been added, leads to the cleaned workpieces being dry again immediately after cleaning or drying off quickly by themselves.
  • the cleaning according to the invention has a very good cleaning effect, it is carried out extremely gently, so that, for. B. the paint remains undamaged on a painted workpiece surface.
  • a small amount of an anti-corrosion agent can also be easily added to the water to be evaporated for the cleaning according to the invention, in order to prevent the cleaned workpieces from corroding.
  • processing or treatment residues carried along with the used blown air can also be separated from the used blown air, so that it is in principle possible to discharge the used air into the environment or outside; in addition, there are only comparatively small amounts of contaminated condensate, which must be disposed of or reprocessed.
  • the dirt detached from the workpieces can be easily removed from the steam condensate, in particular with a conventional cyclone separator, so that it is possible to reuse the used water, if appropriate including the anticorrosive agent, after appropriate treatment, although this is for cleaning according to the invention allow the required small amounts of water to be disposed of economically.
  • a device for cleaning objects which comprises (a) a conventional high-pressure cleaning device with a steam generator for generating high-tension, hot water vapor, (b) an air compressor for generating a compressed air jet, and (c ) a pistol-like spray lance, such as is used in connection with the usual high-pressure cleaning devices, in which spray the high-tension, hot water vapor and the compressed air are brought together, just before the outlet of the spray lance, and a granular abrasive is also introduced into the compressed air jet is before the water vapor is introduced into the compressed air jet.
  • this known cleaning device is a so-called blasting device, through which the objects to be cleaned are subjected to a high-speed compressed air jet which carries the granular blasting agent with them, this known cleaning device is not suitable for gentle workpiece cleaning for this reason alone. that would allow even painted workpieces to be cleaned without damaging the painted workpiece surface.
  • a known high-pressure cleaning device with a steam generator leads to the fact that in this known cleaning device which contains the granular abrasive compressed air jet with a high proportion of water vapor, so that the cleaned objects are wet after cleaning and would have to be subjected to a separate drying process, one would use this known cleaning device in a production and / or assembly line.
  • the steam can be added to the air jet upstream of the blowing nozzle, but it is advantageous to have the steam as short as possible before or even to be added to the air jet within the blow nozzle so that the steam hits the workpiece to be cleaned as far as possible in the form of steam and the smallest possible quantities of steam are required.
  • the channel of the cleaning system according to the invention could thus have, for example, a U-shaped cross section and be open at the top or be formed only by two side splash protection walls running parallel to one another in the direction of movement of the workpieces.
  • the channel is closed on all sides except for an in particular closable inlet and outlet opening for the workpieces.
  • Such embodiments enable a further improvement of the cleaning system according to the invention such that the blown air is at least almost completely circulated;
  • a corresponding embodiment is characterized by a closed blown air circuit containing the duct and the air conveyor, the blower nozzle and the condensate separator (apart from the fact that the inlet and outlet opening of the duct may not be really absolutely gas-tight as long as the workpiece is closed) or the workpieces are being cleaned). Too high a moisture content of the blown air circulated is avoided in this embodiment in that, with a corresponding design of the blown air circuit, the steam added to the blown air is at least largely condensed downstream of the cleaning point.
  • the air conveyor is affected as little as possible by the steam or the steam condensate and the dirt contained in it, it is advisable to provide the condensate separating device downstream of the outlet of the duct and upstream of the air conveyor, and also to provide dirt carried along by the actual blown air
  • a dirt separator for separating dirt removed from the workpieces from the blown air is also provided in the blown air circuit downstream of the outlet of the duct and upstream of the air conveyor, which dirt separator can be a simple mechanical filter .
  • the cleaning installation according to the invention In contrast to the known cleaning installation resulting from DE-A-34 19 028, but in accordance with the cleaning installation according to DE-A-44 25 765, it is recommended for the cleaning installation according to the invention to provide the outlet of the channel on a bottom of the latter in order to take into account the fact that the walls of the channel act as baffles for the condensate droplets carried by the blown air or by the used blown air, i. H. as liquid separation elements.
  • the blown air nozzle or a plurality of blown air nozzles could be held by a robot-like handling device and moved along the workpieces to be cleaned and / or around them; However, it is simpler to design the blowing nozzle in such a way that it has an air outlet opening at least substantially enclosing the workpiece to be cleaned and the blowing nozzle and workpiece can be moved relative to one another transversely to this air outlet opening, in particular in that the workpieces are conveyed through the workpiece transport device be passed through the blow nozzle.
  • an area of the transport device carrying the workpiece is permeable to air transversely to the longitudinal direction of the channel, because then the blown air together with the steam carried by it can be directed from all directions onto the workpieces carried by the transport device.
  • the air conveyor does not convey the blown air to the blower nozzle under high pressure, since this minimizes the energy requirement of the cleaning system.
  • very good cleaning results can be achieved if the air conveyor is designed in such a way that it delivers at least approx. 600 m 3 / h of blowing air per blowing nozzle.
  • the steam is supplied by a steam generator which is designed such that the water vapor has a pressure of approximately 0.5 to 8 bar and a temperature of approximately 110 ° C. to 200 ° C. If a corrosion protection agent is to be added to the water to be evaporated, it is entirely sufficient if the water contains a maximum of 0.5% by volume, preferably only 0.1 to 0.2% by volume, of the corrosion protection agent.
  • the air conveyor is designed such that the Air is supplied to the blow nozzle at a pressure of at most approximately 0.3 bar, preferably of only approximately 0.2 bar.
  • embodiments are recommended in which the water vapor is introduced into the blown air jet approximately 2 to 20 cm before the outlet opening of the blower nozzle - depending on the construction of the blower nozzle the water vapor is added to the air jet as shortly as possible before the nozzle outlet opening, but is always relaxed in front of the blowing nozzle.
  • the distance between the outlet opening of the blowing nozzle and the workpiece to be cleaned be as small as possible, which is why in preferred embodiments of the cleaning system according to the invention this distance, also depending on the contours of the workpieces to be cleaned, is approximately 0.1 to 5 cm is.
  • the amount of steam to be supplied to the blown air per unit of time can be controlled via the energy supplied to the steam generator; However, it may be advisable to supply the water to the steam generator by means of a metering pump, preferably by means of a metering pump which can be adjusted with regard to its delivery rate.
  • the cleaning system shown as a whole in FIG. 1 has a channel 10 which is closed everywhere on its circumference - apart from openings described in the following - but is open at both ends; 1 on the left-hand end thus forms an inlet / outlet opening 12 for the workpieces to be cleaned.
  • Approximately in the middle of the channel 10 is surrounded by an annular blow nozzle 14, which also has an annular nozzle opening 16 illustrated by arrows - at this point the wall of the channel 10 has an annular slot; the blowing nozzle 14 therefore preferably does not protrude into the interior of the channel 10, and it is in particular designed as described and illustrated in DE-A-44 25 765.
  • the nozzle opening 16 is oriented such that the blowing nozzle 14 generates an annular jet of blowing air, which is directed into the interior of the channel 10 and is slightly inclined towards the inlet / outlet opening 12.
  • the bottom of the duct 10 is formed by a suction funnel 18, while the rest of the inside cross section of the duct 10 is constant over its entire length.
  • the inlet / outlet opening 12 is associated with a workpiece transport device with which a workpiece 20 to be cleaned can be introduced through the inlet / outlet opening into the channel 10, pushed through the nozzle opening 16 and then pulled out of the channel 10 again;
  • this workpiece transport device comprises a slide rod 22 extending in the longitudinal direction of the channel 10, which can be held by means not shown and pushed back and forth in the longitudinal direction of the channel 10, and a workpiece carrier 24 held by the slide rod 22, at its two ends in each case a bulkhead 26 or 28 is attached.
  • the workpiece carrier 24 forms a vertically air-permeable support for a workpiece 20 to be cleaned, while the two bulkheads 26 and 28 are air-impermeable and - apart from the area of the suction funnel 18 - can slide sealingly along the inner wall of the channel 10.
  • the workpiece carrier 24 is designed so long that after the introduction of a workpiece 20 to be cleaned into the channel 10 in the starting position of the workpiece carrier shown in FIG. 1 for the cleaning process, the bulkhead 28 is somewhat behind, ie. H. 1 to the right of the nozzle opening 16, while the bulkhead 26 is approximately at the left end of FIG. 1 of the suction funnel 18.
  • the duct 10 together with the blowing nozzle 14 is part of an at least substantially closed blowing air circuit 30, the parts of which are to be described below:
  • a barrel-shaped separating device 34 which has on its upper side an outlet opening, not shown, to which a second suction line 36 is connected.
  • the latter connects the separating device 34 to the suction side of a blown air fan 38, to the outlet of which a blown air line 40 is connected. Through this, the blown air conveyed by the fan 38 is fed to the blower nozzle 14.
  • a cleaning liquid to be used in the cleaning process ie water or water with added anti-corrosion agent, is stored in a cleaning liquid tank 42; cleaning liquid is sucked out of this by means of a metering pump 44 and a suction line 46 and conveyed into a pressure line 48 which contains a steam generator 50 which is particularly adjustable in terms of its output.
  • the pressure line 48 is guided into the blown air line 40 in a sealed manner and ends there in a nozzle 51, with the aid of which the steam is blown into the blown air stream shortly before the blower nozzle 14 and expanded.
  • the blowing in of the steam somewhat upstream of the annular blowing nozzle 14 has the advantage that one single nozzle 51 is sufficient and does not require several nozzles distributed over the circumference of the blowing nozzle 14.
  • the separating device 34 contains a cyclone separator 60 approximately halfway up, which can be of a construction known per se and therefore does not have to be described and illustrated in detail. It is used to extract air from the fan 38 through the suction line 32 to separate the blown air stream sucked off from the duct 10, steam condensate droplets and, optionally, anti-corrosion agent droplets and dirt, which has been removed from the cleaned workpiece, with the aid of centrifugal forces which are generated by the blown air to be cleaned forming a vortex in the cyclone separator 60, below an approximately funnel-shaped intermediate wall 62 of the separating device 34. Solid particle dirt 64 originating from the cleaned workpiece then sediments at the bottom of the separating device 34, while e.g. B.
  • the contaminated condensate 66 is drawn off from the separating device 34, specifically by means of a drain line 72, which preferably contains a valve 74.
  • the drain line 72 leads to a treatment device 76, shown only schematically, in which fats, oils or other similar contaminants are separated from the condensate in a manner known per se and which is also to contain a pump with which the cleaned condensate is conveyed back into the cleaning liquid tank 42 .
  • the workpiece carrier 24 can also be loaded with several workpieces to be cleaned instead of with a single workpiece 20 shown in FIG. 1.
  • the fan 38, the metering pump 44 and the steam generator 50 are switched on and the workpiece carrier 24 slowly according to FIG. 1 from the left moved to the right until all areas of the workpiece to be cleaned have passed the annular nozzle opening 16; 1, the workpiece carrier 24 is then pulled back from the right to the left into its starting position shown in FIG. 1 and then pulled out together with the cleaned workpiece from the channel 10 to the left.
  • the slide rod 22 can be replaced by a double-acting, horizontally displaceable pressure medium cylinder, which has a piston rod holding the workpiece carrier 24 and is also provided with a bulkhead 1, which after the insertion of the workpiece carrier 24 into the channel 10 closes its left end according to FIG. 1 in an airtight manner - because of the bulkhead 28, neither blown air nor dirt can escape from the right open end of the channel 10 during the cleaning process.
  • a double-acting, horizontally displaceable pressure medium cylinder which has a piston rod holding the workpiece carrier 24 and is also provided with a bulkhead 1, which after the insertion of the workpiece carrier 24 into the channel 10 closes its left end according to FIG. 1 in an airtight manner - because of the bulkhead 28, neither blown air nor dirt can escape from the right open end of the channel 10 during the cleaning process.
  • the channel and the workpiece transport device could, however, also be designed as described and / or claimed in DE-A-44 25 765.
  • a modification of the illustrated embodiment can be recommended, which contains a steam valve between the steam generator 50 and the outlet opening of the nozzle 51, so that the steam supply to the blown air to be able to finish shortly before the cleaning process ends - the further exposure of the workpiece only to blown air then leads to an absolutely complete and safe drying of the cleaned workpieces.

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  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)
EP97115224A 1996-09-12 1997-09-03 Installation automatique pour le nettoyage de pièces Expired - Lifetime EP0829313B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19637086 1996-09-12
DE19637086A DE19637086C2 (de) 1996-09-12 1996-09-12 Automatisch arbeitende Reinigungsanlage für Werkstücke

Publications (3)

Publication Number Publication Date
EP0829313A2 true EP0829313A2 (fr) 1998-03-18
EP0829313A3 EP0829313A3 (fr) 1998-06-24
EP0829313B1 EP0829313B1 (fr) 2003-05-14

Family

ID=7805377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97115224A Expired - Lifetime EP0829313B1 (fr) 1996-09-12 1997-09-03 Installation automatique pour le nettoyage de pièces

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US (1) US6119365A (fr)
EP (1) EP0829313B1 (fr)
DE (1) DE19637086C2 (fr)
ES (1) ES2193306T3 (fr)

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DE10122992C1 (de) * 2001-05-11 2002-08-08 Ukm Umformtechnik Und Kraftfah Vorrichtung zum Entölen von Massenteilen mit strukturierter Oberfläche mittels eines Druckluftstrahles
US7146991B2 (en) 2002-01-23 2006-12-12 Cinetic Automation Corporation Parts washer system
DE10249425A1 (de) * 2002-10-23 2004-05-13 FITR-Gesellschaft für Innovation im Tief- und Rohrleitungsbau Weimar mbH Verfahren zum Schneiden oder Fräsen von gebundenen mineralstoffhaltigen Baustoffen
US7353832B2 (en) * 2003-08-21 2008-04-08 Cinetic Automation Corporation Housingless washer
US7338565B2 (en) * 2003-08-21 2008-03-04 Cinetic Automation Corporation Housingless washer
JP4786351B2 (ja) * 2006-01-20 2011-10-05 株式会社東芝 処理装置及び処理方法
AT9203U1 (de) * 2006-04-06 2007-06-15 Econ Maschb Und Steuerungstech Trocknungseinrichtung
DE102007016673A1 (de) * 2007-04-04 2008-10-09 Rieter Automatik Gmbh Vorrichtung und Verfahren zum Entwässern und Trocknen eines Gemisches aus Kunststoffgranulat und Wasser
DE102014101123B4 (de) * 2014-01-30 2022-10-20 Elwema Automotive Gmbh Verfahren und Anlage zum Reinigen eines Werkstücks aus Metall nach spanabhebender Bearbeitung unter Minimalmengenschmierung
CN107078077B (zh) * 2014-09-30 2020-11-10 赫姆洛克半导体运营有限责任公司 多晶硅芯片回收组件和从多晶硅清洗装置中回收多晶硅芯片的方法
DE102017008032A1 (de) 2017-08-24 2019-02-28 Audi Ag Werkzeugmaschine
CN109351832B (zh) * 2018-09-25 2024-04-26 马鞍山瑞恒精密制造有限公司 一种水口铁壳自动化生产系统
CN113865317B (zh) * 2021-09-17 2022-09-27 温州市万荣电镀有限公司 一种电镀件清洁烘干装置

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DE3419028A1 (de) * 1984-04-05 1985-11-21 Kessler & Luch Gmbh, 6300 Giessen Verfahren zum reinigen von koerpern mit luftstrahlen und vorrichtung zur durchfuehrung des verfahrens
GB2283906A (en) * 1993-11-23 1995-05-24 James Francis Geraghty Cleaning system and lance
DE4425765A1 (de) * 1994-07-21 1996-01-25 Duerr Gmbh & Co Verfahren und Anlage zum Reinigen von Werkstücken mittels eines Druckluftstrahles

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DE3734200A1 (de) * 1987-10-09 1989-04-27 Kliro Bau Gmbh & Co Kg Verfahren und vorrichtung zum entfernen anhaftenden schmiermittels von werkstuecken
DE4122864C2 (de) * 1991-07-11 2003-06-12 Dietrich Martina Verfahren und Vorrichtung zum Reinigen und Schälen von Früchten
DE4440146C2 (de) * 1994-11-10 1999-07-22 Kaercher Gmbh & Co Alfred Strahlvorrichtung zur Reinigung von Gegenständen
DE19544074C2 (de) * 1995-11-25 1999-01-14 Duerr Systems Gmbh Automatisch arbeitende Reinigungsanlage für Werkstücke

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
DE3419028A1 (de) * 1984-04-05 1985-11-21 Kessler & Luch Gmbh, 6300 Giessen Verfahren zum reinigen von koerpern mit luftstrahlen und vorrichtung zur durchfuehrung des verfahrens
GB2283906A (en) * 1993-11-23 1995-05-24 James Francis Geraghty Cleaning system and lance
DE4425765A1 (de) * 1994-07-21 1996-01-25 Duerr Gmbh & Co Verfahren und Anlage zum Reinigen von Werkstücken mittels eines Druckluftstrahles

Also Published As

Publication number Publication date
EP0829313A3 (fr) 1998-06-24
DE19637086A1 (de) 1998-03-19
DE19637086C2 (de) 1999-06-24
ES2193306T3 (es) 2003-11-01
EP0829313B1 (fr) 2003-05-14
US6119365A (en) 2000-09-19

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