WO2001060534A1 - Device and method for the precision cleaning of objects - Google Patents
Device and method for the precision cleaning of objects Download PDFInfo
- Publication number
- WO2001060534A1 WO2001060534A1 PCT/IB2001/000148 IB0100148W WO0160534A1 WO 2001060534 A1 WO2001060534 A1 WO 2001060534A1 IB 0100148 W IB0100148 W IB 0100148W WO 0160534 A1 WO0160534 A1 WO 0160534A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chamber
- solvent
- pieces
- container
- rotation
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0021—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by liquid gases or supercritical fluids
-
- 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
- B08B3/06—Cleaning involving contact with liquid using perforated drums in which the article or material is placed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
Definitions
- the present invention relates to the precision cleaning of high-tech products of precision, micro and nano mechanics, electronics, the ceramic industry, cermets, polymers, textile fibers, etc.
- the precision cleaning process nowadays use organic solvents, especially chlorinated organic solvents such as trichlorethylene and perchlorethylene, chlorofluorocarbides or detergents or surfactants in the water phase.
- chlorinated organic solvents and freons has recently been criticized, if not prohibited, because they have been classified as harmful to health and the stratospheric ozone layer is destructive.
- the water phases pose serious problems in terms of final quality because they are difficult to completely eliminate, especially from capillary lines and holes, due to the low vapor pressure of the water and its relatively high viscosity in the liquid state. They also create dirty waters that require complex and costly cleaning processes.
- all of these methods hardly allow the recovery of contaminating substances that could be reused, in particular like the cutting oils used in mechanical processing.
- This solvent as well as nitrogen protoxide, ethane, etc., can have a good dissolving action in the liquid phase, but they increase their dissolving action in the vapor phase, especially in areas which are difficult to access, owing to the greater diffusibility and lower viscosity that they reach in the gas state.
- the supercritical state temperature higher than the critical one and pressure also higher than the critical one
- the combination of both properties (low viscosity and high density) makes them ideal solvents for precision cleaning processes, which must guarantee a high degree of cleaning in every point of the surface and in the hard-to-reach areas.
- solvents have proven to be particularly effective for non-polar or slightly polar contaminants; polar organic substances such as additives to cutting oils, salts, abrasives and metals are not noticeably soluble in solvents that are suitable for cleaning in the supercritical phase. Such residues remaining in the solid phase on the surfaces to be cleaned by adhesion or adsorption must be removed from them by physical means: for this purpose, the effectiveness of the cavitation is recognized, which occurs over the surfaces immersed in a liquid through which ultrasound waves propagate.
- the propagation of the ultrasonic waves in the autoclave is effected by generators located inside the chamber.
- the mechanical removal of the solid particles and liquids is accomplished by valves located at the entrance of the solvent to create turbulence, or by creating bubbles such that the solvent is kept at a temperature near the boiling point, or by another movement of the liquid solvent caused by propellers or solid elements.
- fixed or movable brushes are still used for the load.
- Fig. 1 is a schematic representation of an embodiment of the invention.
- the invention relates to an apparatus and a method for the precision cleaning of surfaces with complex shapes by using inert liquid or supercritical fluids as solvents, namely supported by irradiation of the surfaces to be cleaned with ultrasonic waves and by the resulting cavitation in a programmed movement of the pieces to be cleaned.
- the dissolving action of the liquid and / or supercritical fluid removes the soluble or solid contaminating substances from the surfaces.
- the cavitation effect separates the solid, insoluble particles, such as adhesive metallic particles, dust resulting from the abrasives, the organic and inorganic additives, etc., from the surface and then removes them in suspension by the fluid flow.
- This drum may or may not be provided with central axes. In it the pieces are free to move with respect to the wall of the drum.
- the bases and the outer surface of the drum are designed in the form of gratings that allow the passage of the ultrasonic waves and at the same time the solid heavy particles that separate from the surface of the pieces.
- the return of the pieces is also facilitated by the fact that they are located inside a drum which is inserted into the chamber at the beginning and removed at the end.
- the removal of the solid parts in suspension is also facilitated by the movement which frees them.
- the possibility of modulating the speed of rotation of the drum allows the mechanical friction between the pieces to be metered in order to avoid damage.
- rotation speeds of 1 to 100 revolutions per minute can be provided for 10 to 20 minutes with 1 or 2 changes of rotation.
- the power provided is generally of the order of 1000 W and the frequency between 10 and 2000 kHz depending on the dimensions of the solid particles to be rubbed off the surface of the pieces.
- the device consists of an autoclave 1, in which the drum 2 is inserted, in which the pieces 3 are located, which are to be subjected to the precision cleaning process.
- the drum is driven by the motor 4 via an axis 5.
- Ultrasonic transducers 6 are arranged on the outer cylindrical surface 11 of the autoclave 1, one over the entire inside of the wall
- the fluid can be transported in the autoclave 1 after preheating or at room temperature via the inlet 7 and can also be cooled by evaporation via the outlet 8 and 9. Excessive cooling of the chamber during the depression phase can be avoided by introducing an inert gas at a suitable pressure through the inlet 10.
- Temperatures, alternation and duration of the cleaning cycles in the liquid and supercritical phase, the movements of the drum 2 with the pieces to be cleaned 3 (sense of rotation, change of direction, times and speed), pressure and amount of the solvent are by a computer (not in 1) and regulates a specific program.
- Both the detached substances in the liquid or mainly supercritical phase, as well as the solid particles in suspension are conveyed out of the chamber by a fluid flow.
- Another embodiment of the invention is characterized in that the container 2 is rotatable in both directions of rotation, and that the possibility consists of changing the direction of rotation and / or the speed of rotation. This is preferably done in a programmed form.
- the device according to the invention can also be provided with blades arranged on the inner wall of the container 2 or on an axis in order to enable a guided movement of the pieces 3.
- the ultrasonic transducers 6 can be arranged on the outer wall 11 of the chamber 1, preferably on the one with the larger extension.
- the inlet 7 for the solvent can be at the lowest point inside the chamber 1 and the outlet 9 at the highest point. Furthermore, an outlet 8 for the solvent can be located in the lowest point of the chamber 1, this preferably being in a position opposite the inlet 7. At the highest point of the chamber 1, preferably in an area opposite the outlet 9, there can be another inlet 10 which is provided for a gas, preferably an inert gas such as nitrogen, argon or helium.
- a gas preferably an inert gas such as nitrogen, argon or helium.
- the method for precision cleaning with the aid of the described device is characterized in that the pieces 3 to be cleaned are exposed to a preferably continuous flow of a fluidic solvent and / or an ultrasound energy from a stationary source 6, the pieces 3 being characterized by Movement of the container 2 can be moved.
- a further embodiment of the method is characterized in that a solvent at a critical temperature between -70 ° and 700 ° and a critical pressure between 1 and 700 bar, preferably carbon dioxide, propane, ethane, water or nitrogen protoxide, optionally supported by a co-solvent, preferably water or an organic solvent such as preferably an alcohol, an ester, an ether or a surfactant is used, which can be pure or dissolved in said co-solvent.
- a solvent at a critical temperature between -70 ° and 700 ° and a critical pressure between 1 and 700 bar preferably carbon dioxide, propane, ethane, water or nitrogen protoxide, optionally supported by a co-solvent, preferably water or an organic solvent such as preferably an alcohol, an ester, an ether or a surfactant is used, which can be pure or dissolved in said co-solvent.
- a solvent at a critical temperature between -70 ° and 700 ° and a critical pressure between 1 and 700 bar preferably carbon dioxide
- the use of ultrasound waves programmed with regard to duration, intensity and / or frequency causes a cavitation effect on the surfaces of the pieces 3 to be cleaned.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01953012A EP1255621B1 (en) | 2000-02-18 | 2001-02-06 | Autoclave for the precision cleaning of objects and use of the autoclave |
DE50107279T DE50107279D1 (en) | 2000-02-18 | 2001-02-06 | AUTOCLAVE FOR PRECISION CLEANING OF PIECES AND USE OF THE AUTOCLAVE |
AU2001228744A AU2001228744A1 (en) | 2000-02-18 | 2001-02-06 | Device and method for the precision cleaning of objects |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH0312/00 | 2000-02-18 | ||
CH3122000 | 2000-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001060534A1 true WO2001060534A1 (en) | 2001-08-23 |
Family
ID=4494778
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2001/000148 WO2001060534A1 (en) | 2000-02-18 | 2001-02-06 | Device and method for the precision cleaning of objects |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1255621B1 (en) |
AU (1) | AU2001228744A1 (en) |
DE (1) | DE50107279D1 (en) |
WO (1) | WO2001060534A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6846380B2 (en) | 2002-06-13 | 2005-01-25 | The Boc Group, Inc. | Substrate processing apparatus and related systems and methods |
US7195676B2 (en) | 2004-07-13 | 2007-03-27 | Air Products And Chemicals, Inc. | Method for removal of flux and other residue in dense fluid systems |
US7211553B2 (en) | 2003-08-05 | 2007-05-01 | Air Products And Chemicals, Inc. | Processing of substrates with dense fluids comprising acetylenic diols and/or alcohols |
US7267727B2 (en) | 2002-09-24 | 2007-09-11 | Air Products And Chemicals, Inc. | Processing of semiconductor components with dense processing fluids and ultrasonic energy |
WO2012142479A1 (en) * | 2011-04-15 | 2012-10-18 | W.L. Gore & Associates, Inc. | Method of reducing friction between syringe components |
US8722178B2 (en) | 2009-10-29 | 2014-05-13 | W. L. Gore & Associates, Inc. | Syringe stopper |
US9597458B2 (en) | 2009-10-29 | 2017-03-21 | W. L. Gore & Associates, Inc. | Fluoropolymer barrier materials for containers |
DE102015222247A1 (en) * | 2015-11-11 | 2017-05-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for processing capillary tubes |
US10471212B2 (en) | 2009-10-29 | 2019-11-12 | W. L. Gore & Associates, Inc. | Silicone free drug delivery devices |
US11612697B2 (en) | 2010-10-29 | 2023-03-28 | W. L. Gore & Associates, Inc. | Non-fluoropolymer tie layer and fluoropolymer barrier layer |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1961900A1 (en) * | 1968-12-31 | 1970-07-16 | Boliden Ab | Process for chlorinating roesting at low temperatures of non-ferrous metals present in roast products and their leaching and recovery |
US4922939A (en) * | 1988-02-01 | 1990-05-08 | Henry Adamczyk | Dental cleaning apparatus |
US5759209A (en) * | 1995-03-16 | 1998-06-02 | Linde Aktiengesellschaft | Cleaning with liquid gases |
US5858107A (en) * | 1998-01-07 | 1999-01-12 | Raytheon Company | Liquid carbon dioxide cleaning using jet edge sonic whistles at low temperature |
EP0893166A1 (en) * | 1996-09-25 | 1999-01-27 | Shuzurifuresher Kaihatsukyodokumiai | Washing means using liquefied gas of high density |
EP0894542A1 (en) * | 1991-10-04 | 1999-02-03 | Cfmt, Inc. | Ultracleaning of involuted microparts |
DE19741836A1 (en) * | 1997-09-23 | 1999-03-25 | Bosch Gmbh Robert | Cleaning device for pharmaceutical containers like ampoules and vials |
US5944996A (en) * | 1995-11-03 | 1999-08-31 | The University Of North Carolina At Chapel Hill | Cleaning process using carbon dioxide as a solvent and employing molecularly engineered surfactants |
-
2001
- 2001-02-06 WO PCT/IB2001/000148 patent/WO2001060534A1/en active IP Right Grant
- 2001-02-06 AU AU2001228744A patent/AU2001228744A1/en not_active Abandoned
- 2001-02-06 DE DE50107279T patent/DE50107279D1/en not_active Expired - Lifetime
- 2001-02-06 EP EP01953012A patent/EP1255621B1/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1961900A1 (en) * | 1968-12-31 | 1970-07-16 | Boliden Ab | Process for chlorinating roesting at low temperatures of non-ferrous metals present in roast products and their leaching and recovery |
US4922939A (en) * | 1988-02-01 | 1990-05-08 | Henry Adamczyk | Dental cleaning apparatus |
EP0894542A1 (en) * | 1991-10-04 | 1999-02-03 | Cfmt, Inc. | Ultracleaning of involuted microparts |
US5759209A (en) * | 1995-03-16 | 1998-06-02 | Linde Aktiengesellschaft | Cleaning with liquid gases |
US5944996A (en) * | 1995-11-03 | 1999-08-31 | The University Of North Carolina At Chapel Hill | Cleaning process using carbon dioxide as a solvent and employing molecularly engineered surfactants |
EP0893166A1 (en) * | 1996-09-25 | 1999-01-27 | Shuzurifuresher Kaihatsukyodokumiai | Washing means using liquefied gas of high density |
DE19741836A1 (en) * | 1997-09-23 | 1999-03-25 | Bosch Gmbh Robert | Cleaning device for pharmaceutical containers like ampoules and vials |
US5858107A (en) * | 1998-01-07 | 1999-01-12 | Raytheon Company | Liquid carbon dioxide cleaning using jet edge sonic whistles at low temperature |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6846380B2 (en) | 2002-06-13 | 2005-01-25 | The Boc Group, Inc. | Substrate processing apparatus and related systems and methods |
US7267727B2 (en) | 2002-09-24 | 2007-09-11 | Air Products And Chemicals, Inc. | Processing of semiconductor components with dense processing fluids and ultrasonic energy |
US7211553B2 (en) | 2003-08-05 | 2007-05-01 | Air Products And Chemicals, Inc. | Processing of substrates with dense fluids comprising acetylenic diols and/or alcohols |
US7195676B2 (en) | 2004-07-13 | 2007-03-27 | Air Products And Chemicals, Inc. | Method for removal of flux and other residue in dense fluid systems |
US10471212B2 (en) | 2009-10-29 | 2019-11-12 | W. L. Gore & Associates, Inc. | Silicone free drug delivery devices |
US8722178B2 (en) | 2009-10-29 | 2014-05-13 | W. L. Gore & Associates, Inc. | Syringe stopper |
US11654241B2 (en) | 2009-10-29 | 2023-05-23 | W. L. Gore & Associates, Inc. | Fluoropolymer barrier material for containers |
US9597458B2 (en) | 2009-10-29 | 2017-03-21 | W. L. Gore & Associates, Inc. | Fluoropolymer barrier materials for containers |
US11020531B2 (en) | 2009-10-29 | 2021-06-01 | W. L. Gore & Associates, Inc. | Silicone free drug delivery devices |
US10478563B2 (en) | 2009-10-29 | 2019-11-19 | W. L. Gore & Associates, Inc. | Fluoropolymer barrier materials for containers |
US11612697B2 (en) | 2010-10-29 | 2023-03-28 | W. L. Gore & Associates, Inc. | Non-fluoropolymer tie layer and fluoropolymer barrier layer |
WO2012142479A1 (en) * | 2011-04-15 | 2012-10-18 | W.L. Gore & Associates, Inc. | Method of reducing friction between syringe components |
EP3560535A1 (en) * | 2011-04-15 | 2019-10-30 | W. L. Gore & Associates, Inc. | Method of reducing friction between syringe components |
US9539394B2 (en) | 2011-04-15 | 2017-01-10 | W. L. Gore & Associates, Inc. | Method of reducing friction between syringe components |
DE102015222247B4 (en) * | 2015-11-11 | 2017-10-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for processing capillary tubes |
DE102015222247A1 (en) * | 2015-11-11 | 2017-05-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for processing capillary tubes |
Also Published As
Publication number | Publication date |
---|---|
EP1255621A1 (en) | 2002-11-13 |
AU2001228744A1 (en) | 2001-08-27 |
DE50107279D1 (en) | 2005-10-06 |
EP1255621B1 (en) | 2005-08-31 |
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