US3028267A - Process and apparatus for cleaning rigid objects - Google Patents

Process and apparatus for cleaning rigid objects Download PDF

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Publication number
US3028267A
US3028267A US815929A US81592959A US3028267A US 3028267 A US3028267 A US 3028267A US 815929 A US815929 A US 815929A US 81592959 A US81592959 A US 81592959A US 3028267 A US3028267 A US 3028267A
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US
United States
Prior art keywords
solvent
objects
chamber
liquid solvent
vapor
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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
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US815929A
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English (en)
Inventor
Edhofer Georg
Hollerer Hans
Lebsanft Kurt
Schmidt Ernst
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Wacker Chemie AG
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Wacker Chemie AG
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • 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
    • 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
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
    • C23G5/04—Apparatus

Definitions

  • Another object of the invention is to expedite the complete removal of soluble and insoluble dirt and other irnpurities from objects of the above type and to etfect a considerable saving in the cost of the cleaning operation.
  • the objects to be cleaned are conveyed through various cleaning and washing chambers, the first oi which may contain fillers of the type mentioned while one or more succeeding chambers may contain only the liquid solvent.
  • the first chamber quickly get-s soiled with all kinds of dirt, which necessitates frequent changing of the solvent and cleaning or replacement of the soiled fillers.
  • An important advantage of the invention resides in the fact that during the initial treatment of the objects with the solvent vapors, the major quantity of dirt and grease 3,028,257 Patented Apr. 3, 1962 rice removed by the condensate dripping off the treated ob jects does not get into the chamber containing the tillers, but is deflected away from said chamber by a drip shield or pan and the soiled condensate conducted away for distillation.
  • the filler chamber in which the initially degreased objects are next immersed, remains absolutely free of grease and oil, assuring its greatly prolonged period of use.
  • the above-mentioned step of degreasing and de-oiling may be performed directly over the filler chamber, the area above said filler chamber being filled with solvent vapors as hereinafter described,
  • a hinged sloping drip pan is mounted above the filler chamber and shields the entire area of said filler chamber while the degreasing step is taking place.
  • the dirty condensate is intercepted by the drip pan and flows down into a collection gutter.
  • the hinged drip pan is raised to a vertical position and the entire area of the tiller chamber thus becomes unobstructed for the immersion of the already degreased objects to be cleaned.
  • the filler-containing solvent in the filler chamber is kept in motion, preferably by boiling, and, when the object to be cleaned is immersed therein, the rubbing action wipes of? theremaining dirt, etc, which was not removed by the initial degreasing step.
  • the boiling solvent in the filler chamber also provides the solvent vapor which serves forthe preliminary degreasing and for keeping the treated objects moist.
  • the objects being cleaned are washed in one or more solvent chambers, and the solvent in the last of said chambers is preferably cooled in order to provide a repeated washing by the condensation of the solvent vapors. If desired, the objects can then be sprayed or pressure Washed with clean solvent which may be obtained by distilling the dirty solvent removed during the degreasing operation.
  • FIG. 1 is a diagrammatic longitudinal sectional view of a preferred apparatus embodying the invention.
  • FIG. 2 is a similar view illustrating a modification of the invention.
  • the apparatus shown in FIG. 1 comprises a vessel -1 which is sub-divided transversely into three cleaning chambers 2, 3 and 4, all of which contain a liquid solvent,
  • a chlorinated aliphatic hydrocarbon such as trichlorethylcne or perchlorethylene.
  • the chamber 2 which We call the filler chamber, also has suitable filler particles suspended in the liquid solvent.
  • the solvent in chamber 2 may contain about 5% by weight of ball-shaped particles of polyvinyl chloride (average molecular weight 47,000) of 0.5-1 mm. diameter.
  • the solvent in filler chamber 2 is heated in any suitable manner, for example by a heating coil 5. When the temperature of the solvent is raised to the boiling point, it is agitated and this agitation efiects a distribution of the polyvinyl chloride particles throughout the chamber.
  • the boiling of the solvent in chamber 2, and also in chamber *3 if desired, causes vapors of said solvent to fill the vapor zone 6 in the vessel 1 above chambers 2, 3 and 4.
  • a cooling device or coil 7 is mounted in vessel 1 above chambers 2, 3 and 4 for the purpose of condensing the solvent vapors in the upper part of vessel 1 so that the liquid condensate will drop back into the chambers.
  • This cooling device is placed at such a height above the liquid surface in chamber 4 that the height of the vapor zone 6 corresponds with the immersion depth of the liquid solvent in the chambers.
  • the chambets 2, 3 and 4 are of progressively increasing height, and any excess of the overflow from higher chamber to lower chamber may be drawn off through escape pipe 8 adjacent the top of chamber 2.
  • the downwardly sloping drip shield or pan 9 mounted above filler chamber 2 is hinged at 10 to the chamber wall so that said shield may be swung upwardly by any suitable means, such as a handle outside the vessel 1, to completely uncover the chamber 2.
  • An object to be cleaned such as a metal plate 12, is shown in FIG. 1 suspended by a chain or wire 13 held by the hand or by an automatic conveyor directly above the drip shield 9 in the vapor zone for the initial step of degreasing.
  • the condensate dripping ofi the object 12 flows down the shield 9 into the gutter 14 and is conducted through pipe 15 into the distillation vessel 16.
  • drip shield 9 is swung upwardly on its hinge 10, uncovering the filler chamber 2, and the object 12 is immersed either manually or mechanically in the solvent in chamber 2 for a few seconds and then withdrawn substantially free of dirt and foreign particles. The said object is then successively immersed in and removed from the solvent in chambers 3 and 4, where a few seconds washing removes every vestige of foreign matter. While drip shield 9 is being raised, the object 12 may be moved momentarily to a position over chamber 3, out of the way of said shield. The solvent in the final washing chamber 4 may be cooled as by means of a cooling coil 17.
  • FIG. 2 shows a modification of the invention in which the object 12 to be cleaned is initially degreased in a special vapor treating area 6a constituting a forward extension or continuation of the vapor zone 6.
  • the dirty condensate dripping from the object 12 flows into a collecting funnel 18 from which it is conveyed by pipe 19 to the distillation vessel 16.
  • the process and apparatus are as described in connection with FIG. 1.
  • the boiling of the solvent in chamber 2 causes said solvent and the fillers therein to be agitated, which expedities the cleaning operation.
  • the solvent in this chamber as well as in the other chambers may also be agitated mechanically or electrically as by audible or inaudible sound waves, if desired.
  • the objects being cleaned may also be agitated in any suitable manner to supplement the normal agitation caused by dipping or plunging said objects into the successive batches of solvent.
  • Process for cleaning objects in a plurality of successive batches of volatile liquid solvent which comprises continuously creating a vapor of said solvent in the zone above said successive batches of liquid solvent and continuously condensing said vapor to precipitate the condensate into said liquid solvent to replenish the latter, initially placing the object to be cleaned in said vapor zone above one of said batches of liquid solvent, intercepting condensed solvent precipitating from said obfeet and discharging same at a point remote from said batches of liquid solvent, and then, while said object is still moist with solvent, immersing said object in and removing it from said successive batches of liquid solvent.
  • Apparatus for cleaning objects comprising a vessel containing a plurality of successive chambers each adapted to contain a volatile liquid solvent in which said objects are adapted to be immersed, means for creating a vapor of said solvent in said vessel in the zone above said chambers, means for suspending an object to be cleaned in said vapor zone, and means in the vapor zone for collecting and removing to a point outside the vessel condensed solvent dripping from said object in said vapor zone, at least one of said chambers being permanently open at the top into the vapor zone.
  • said collecting means comprises a movable shield mounted above one of said chambers, and means for conducting liquid solvent from said shield to a point outside said vessel.
  • Apparatus according to claim 4 which has a preliminary vapor treating area, constituting an extension of the vapor zone above said chambers and disposed in advance of the first of said chambers.

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  • 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)
  • Detergent Compositions (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Devices For Medical Bathing And Washing (AREA)
US815929A 1958-06-13 1959-05-26 Process and apparatus for cleaning rigid objects Expired - Lifetime US3028267A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEW0023502 1958-06-13
DEW0024164 1958-09-26

Publications (1)

Publication Number Publication Date
US3028267A true US3028267A (en) 1962-04-03

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ID=26002257

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Application Number Title Priority Date Filing Date
US815929A Expired - Lifetime US3028267A (en) 1958-06-13 1959-05-26 Process and apparatus for cleaning rigid objects

Country Status (5)

Country Link
US (1) US3028267A (de)
CH (1) CH370996A (de)
DE (2) DE1446573A1 (de)
FR (1) FR1226997A (de)
GB (1) GB916935A (de)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183120A (en) * 1961-09-09 1965-05-11 Toscana Ind Cucine Electrodome Method of washing dishes and the like
US3494794A (en) * 1965-03-30 1970-02-10 Dow Chemical Co Cleaning method
US3527607A (en) * 1968-05-20 1970-09-08 Blackstone Corp Ultrasonic impact cleaners and methods of cleaning
US4014751A (en) * 1975-06-13 1977-03-29 Mccord James W Vapor generating and recovering apparatus
US4032033A (en) * 1976-03-18 1977-06-28 Western Electric Company, Inc. Methods and apparatus for heating articles
US4135530A (en) * 1975-09-15 1979-01-23 Litton Industrial Products, Inc. Rinsing tank
US4248353A (en) * 1979-03-16 1981-02-03 Nassau Recycle Corporation Apparatus for collecting drippings from a wet load carried by a crane
US4264299A (en) * 1980-03-12 1981-04-28 Bell Telephone Laboratories, Incorporated Process and apparatus for controlling losses in volatile working fluid systems
US4289542A (en) * 1980-06-30 1981-09-15 Rho-Chem Corporation Method of vapor degreasing
US4427456A (en) 1982-02-11 1984-01-24 Economics Laboratory, Inc. Tote box content washer and method of washing
US4690158A (en) * 1984-02-16 1987-09-01 Daiwa Special Chemical Co., Ltd. Washing apparatus
US4693786A (en) * 1985-07-02 1987-09-15 Techserve Engineering Corp. Non-electrical solvent recovery distillation apparatus
US4911189A (en) * 1988-02-16 1990-03-27 Halbert James B Motorized vapor degreaser
US5183067A (en) * 1988-07-08 1993-02-02 Isc Chemicals Limited Cleaning and drying of electronic assemblies
US5215593A (en) * 1991-01-09 1993-06-01 Canon Kabushiki Kaisha Method of introducing liquid into small-diameter hole
US5716456A (en) * 1989-10-26 1998-02-10 Kabushiki Kaisha Toshiba Method for cleaning an object with an agent including water and a polyorganosiloxane
US5845661A (en) * 1997-06-18 1998-12-08 R. H. Sheppard Co., Inc. Parts washer
JP2021186736A (ja) * 2020-05-29 2021-12-13 義彦 星原 洗浄装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1938841A (en) * 1930-01-09 1933-12-12 Carrier Res Corp Degreasing system
US2344247A (en) * 1943-04-03 1944-03-14 Bigelow Sanford Carpet Co Inc Pile fabric cleaning method and material
US2732322A (en) * 1956-01-24 murray
US2802758A (en) * 1954-06-10 1957-08-13 Detrex Corp Method of cleaning
US2901383A (en) * 1950-10-26 1959-08-25 Wacker Chemie Gmbh Process for cleaning objects

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732322A (en) * 1956-01-24 murray
US1938841A (en) * 1930-01-09 1933-12-12 Carrier Res Corp Degreasing system
US2344247A (en) * 1943-04-03 1944-03-14 Bigelow Sanford Carpet Co Inc Pile fabric cleaning method and material
US2901383A (en) * 1950-10-26 1959-08-25 Wacker Chemie Gmbh Process for cleaning objects
US2802758A (en) * 1954-06-10 1957-08-13 Detrex Corp Method of cleaning

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183120A (en) * 1961-09-09 1965-05-11 Toscana Ind Cucine Electrodome Method of washing dishes and the like
US3494794A (en) * 1965-03-30 1970-02-10 Dow Chemical Co Cleaning method
US3527607A (en) * 1968-05-20 1970-09-08 Blackstone Corp Ultrasonic impact cleaners and methods of cleaning
US4014751A (en) * 1975-06-13 1977-03-29 Mccord James W Vapor generating and recovering apparatus
US4135530A (en) * 1975-09-15 1979-01-23 Litton Industrial Products, Inc. Rinsing tank
US4032033A (en) * 1976-03-18 1977-06-28 Western Electric Company, Inc. Methods and apparatus for heating articles
US4248353A (en) * 1979-03-16 1981-02-03 Nassau Recycle Corporation Apparatus for collecting drippings from a wet load carried by a crane
WO1981002625A1 (en) * 1980-03-12 1981-09-17 Western Electric Co Process and apparatus for controlling losses in volatile working fluid systems
US4264299A (en) * 1980-03-12 1981-04-28 Bell Telephone Laboratories, Incorporated Process and apparatus for controlling losses in volatile working fluid systems
US4289542A (en) * 1980-06-30 1981-09-15 Rho-Chem Corporation Method of vapor degreasing
US4427456A (en) 1982-02-11 1984-01-24 Economics Laboratory, Inc. Tote box content washer and method of washing
US4690158A (en) * 1984-02-16 1987-09-01 Daiwa Special Chemical Co., Ltd. Washing apparatus
US4693786A (en) * 1985-07-02 1987-09-15 Techserve Engineering Corp. Non-electrical solvent recovery distillation apparatus
US4911189A (en) * 1988-02-16 1990-03-27 Halbert James B Motorized vapor degreaser
US5183067A (en) * 1988-07-08 1993-02-02 Isc Chemicals Limited Cleaning and drying of electronic assemblies
US5716456A (en) * 1989-10-26 1998-02-10 Kabushiki Kaisha Toshiba Method for cleaning an object with an agent including water and a polyorganosiloxane
US5215593A (en) * 1991-01-09 1993-06-01 Canon Kabushiki Kaisha Method of introducing liquid into small-diameter hole
US5845661A (en) * 1997-06-18 1998-12-08 R. H. Sheppard Co., Inc. Parts washer
JP2021186736A (ja) * 2020-05-29 2021-12-13 義彦 星原 洗浄装置

Also Published As

Publication number Publication date
DE1446573A1 (de) 1969-04-10
CH370996A (de) 1963-07-31
DE1446574A1 (de) 1969-04-10
GB916935A (en) 1963-01-30
FR1226997A (fr) 1960-08-18

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