US3876144A - Solvent cleaning of spray nozzles - Google Patents

Solvent cleaning of spray nozzles Download PDF

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Publication number
US3876144A
US3876144A US398856A US39885673A US3876144A US 3876144 A US3876144 A US 3876144A US 398856 A US398856 A US 398856A US 39885673 A US39885673 A US 39885673A US 3876144 A US3876144 A US 3876144A
Authority
US
United States
Prior art keywords
solvent
outlet
nozzle
air
sealing compound
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
US398856A
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English (en)
Inventor
Raymond Francis Madden
Dennis Barry Moreau
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.)
Comalco Products Pty Ltd
Original Assignee
Comalco Products Pty Ltd
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 Comalco Products Pty Ltd filed Critical Comalco Products Pty Ltd
Priority to US398858A priority Critical patent/US3889083A/en
Application granted granted Critical
Publication of US3876144A publication Critical patent/US3876144A/en
Assigned to BANKERS TRUST COMPANY, 280 PARK AVENUE, NEW YORK, NEW YORK 10017 AS COLLATERAL AGENT reassignment BANKERS TRUST COMPANY, 280 PARK AVENUE, NEW YORK, NEW YORK 10017 AS COLLATERAL AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SILGAN CONTAINERS CORPORATION, A CORP. OF DE.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/44—Making closures, e.g. caps
    • B21D51/46—Placing sealings or sealing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B05B15/555—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids discharged by cleaning nozzles

Definitions

  • This invention relates to means for improving the operation of nozzles applying soluble materials to ends for cans. caps for jars and similar applications. where the nozzle is required to eject the sealing compound in a series of jets interrupted by waiting periods while the next work piece is placed in position.
  • the invention has found particular application in the machines used for placing a circle of sealing compound around the peripheries of can cnds before they are as Sild on to can bodies. ln atypical machine used for this purpose.
  • the can ends are fed one at a time to a turntable. located at the center of the turntable. and then rotated under a nozzle which is directed towards the junction between a peripheral flange on the can end blank and the general surface of the blank.
  • the nozzle places in the junction a ring of a sealing compound mixed with a solvent. The solvent quickly evaporates. leaving a resilient seal in intimate contact with the can end blank.
  • the time interval is very short and may be of the order of a small fraction of a second. but during this time the sealing compound left in and on the tip of the nozzle after valve closure has its surface exposed to the atmosphere and loses some of its solvent by evaporation. This results in a very thin skin of sealing com pound being formed. the edges of which tend to adhere to the tip of the nozzle.
  • the present inventor has determined that the problem can be overcome by having the nozzle surrounded by an atmosphere charged with droplets of solvent having a concentration such that the evaporation rate from the droplets causes the atmosphere to be saturated with solvent. thereby preventing evaporation of solvent from the sealing compound.
  • the invention in its broadest aspect. provides means for preventing build-up of sealing compound at the outlet of an intermittently operated sealing com pound ejecting nozzle comprising means to direct a stream of air towards the outlet of said nozzle from a suitable air outlet. and means to inject a solvent into said air stream at a point upstream from said air outlet. said air outlet being located at a distance from said nozzle such that turbulence of the air stream occurs in the area of said nozzle. and the rate of supply of solvent to said air stream being such as to produce an atmosphere saturated with solvent in said turbulent area.
  • FIG. 1 is a side view in elevation of part of a machine for applying sealing compound to can ends with part of the apparatus of the invention in position.
  • FIG. 2 is a cross-sectional view on line 22 of FIG.
  • FIG. 3 is a detail view of part of FIG. 1.
  • FIG. 4 is a diagrammatic view of part of the apparatus of the invention.
  • the equipment used includes a container for a material capable of acting as a solvent for the scaling compound.
  • the sealing compound may be a synthetic rubber and the solvent may be hexane.
  • the container is fitted with a cap 12 which has an air inlet 14 and a solvent outlet 16.
  • An air supply 18 is fed to the equipment from the usual factory compressed air system.
  • the air supply has two branches 20 and 22, each of which is controlled by a precision regulator 24, 26 and fitted with a gauge 28. 30 from which the pressure in the outlet line from the associated regulator can be read.
  • One of the branches 20 goes to the air inlet M in the solvent container 10. while the other branch 22 is fed to an air jet pipe 42 which will be further de scribed below.
  • the solvent tank cap 12 has a tube 34 extending from its solvent outlet vertically downwards and terminating approximately one inch above the bottom of the tank to ensure that no foreign matter will be drawn in with the solvent.
  • the solvent inlet to the tube 34 may be fitted with a filter 36.
  • the solvent outlet is connected to a small-bore tube 38 which has a hyperdermic needle 40 fitted to its outlet end.
  • the second branch of the air stream is connected to an air jet pipe 42 consisting of a length of tube which may have an outside diameter of about 0. [87 inches or 0.5 cm and which as its outlet end swaged down to a small diameter as indicated at 44 in FIG. 3 so that the bore of the tube at the outlet end may be of the order of U.Ul5 inch (0.038 cm).
  • the reduced end. for convenience of installation in a particular application. may be bent at about 120 to the general length of the tube. the bend 46 being of relatively large radius to maintain streamline flow.
  • a small diameter hole 50 is drilled into the pipe. its diameter being such that it is capable of receiving the hyperdermic needle 40.
  • the angle at which this hole is drilled is such that. when the hyperdermic needle is inserted. it will be pointing as nearly as possible in the direction of the flow of air through the jet pipe.
  • the hole is drilled in the radiused section 46 of the pipe and. if its location is on the outside of the bend. this assists in having the outlet of the hyperdermic needle located at approximately the center of the cross-sectional area of the jet pipe. and pointing in approximately the same direction as the flow of air.
  • the space between the hyperdermic needle and the hole through which it enters the jet pipe must be scaled to prevent escape of air.
  • a sealing compound may be used. but it has been found simpler and more effective to place a short length of rubber or plastic tube around the pipe in the area ofthe drilled hole. and to pass the needle through this tube.
  • the precision regulators 24, 26 on the airstream are so controlled that the first branch 20 of the air line applied a pressure to the surface of the solvent in the tank which results in the pressure in the solvent at the outlet of the hyperdermic needle 40 being slightly greater than the pressure in the airstream from the second branch 22 of the air line at the same location.
  • the airstream pressure may be of the order of 3 lbs/inch (about 0.2l kglcm and the pressure in the solvent may be of the order of 4 lbs/inch (about 0.28 kg/cm").
  • the jet pipe 42 is clamped in position adjacent the sealing compound nozzle 52 with its outlet directed generally towards the nozzle outlet.
  • Nozzle 52 is sup ported in a fixed bracket 54 above a turntable 56 to which can end blanks 58 may be fed one at a time for lining with sealing compound.
  • the nozzle is aligned so that a stream of sealing compound can be directed into the junction between the general surface the can end blank and an upstanding peripheral flange 60 while the blank is being rotated through one revolution by turntable 56.
  • the ejection of sealing compound from nozzle 52 is controlled by suitable means such as valve gear 62 illustrated in FIG. 1.
  • the distance between outlet 48 of air jet pipe 42 and the outlet of nozzle 52 is such that, having regard to all of the variables. the air jet from the jet pipe 46 will have deteriorated from streamline motion into a condition of turbulence in the area of the outlet of nozzle 52.
  • the dimensions chosen are such that very little vaporization or atomization of the solvent takes place in the jet pipe. atomization occurring primarily in the area of turbulence referred to above. This enables the production of an atmosphere saturated with solvent in the area of the nozzle outlet with a continuous supply of droplets of solvent to maintain the saturated condition.
  • the rate of input of the solvent having regard to the rate of the airflow. is such as to avoid a. a condition in which an excess supply of solvent makes the outside of the nozzle too wet and gives a di lute sealing compound which is ineffective for its purpose.
  • Apparatus for preventing build-up of sealing compound at the outlet of an intermittently operated sealing compound ejecting nozzle comprising: means to direct a stream of air towards the outlet of said nozzle.
  • said means being in the form of a jet pipe having a small-diameter outlet and a bend of relatively large radius located at a distance from said outlet; and means to inject a solvent into said airstream at a point upstream from said air outlet.
  • said means including a hypodermic needle which enters said jet pipe on the outside of said bend and is aligned substantially coaxially with said jet pipe between said bend and the outlet of said jet pipe.
  • said air outlet being located at a distance from said nozzle such that turbulence of the airstream occurs in the area of said nozzle. and the rate of supply of solvent to said airstream being such as to produce an atmosphere saturated with solvent in said turbulent area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US398856A 1972-09-22 1973-09-19 Solvent cleaning of spray nozzles Expired - Lifetime US3876144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US398858A US3889083A (en) 1973-09-19 1973-09-19 Gas circuit breaker insulating tube support and high pressure vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPB053872 1972-09-22

Publications (1)

Publication Number Publication Date
US3876144A true US3876144A (en) 1975-04-08

Family

ID=3765348

Family Applications (1)

Application Number Title Priority Date Filing Date
US398856A Expired - Lifetime US3876144A (en) 1972-09-22 1973-09-19 Solvent cleaning of spray nozzles

Country Status (8)

Country Link
US (1) US3876144A (it)
BE (1) BE805182A (it)
CA (1) CA985857A (it)
DE (1) DE2347189A1 (it)
FR (1) FR2200760A5 (it)
GB (1) GB1450170A (it)
IT (1) IT995407B (it)
ZA (1) ZA737474B (it)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4259372A (en) * 1978-07-13 1981-03-31 Phillips Petroleum Company Method and apparatus for applying sealant to a seam in a container
US4357005A (en) * 1980-12-08 1982-11-02 Lear Siegler, Inc. Support for seat pad
US4387002A (en) * 1980-03-29 1983-06-07 Maschinenfabrik Alfred Schmermund Gmbh & Co. Adhesive discharge device
US4408562A (en) * 1981-12-21 1983-10-11 Mactron, Inc. Apparatus for applying a coating to a moving surface
US4517917A (en) * 1984-04-26 1985-05-21 Valco Cincinnati, Inc. Blow-off manifold for preventing trailing from a non-contact extrusion adhesive application valve
US4596205A (en) * 1983-04-27 1986-06-24 Driam Metallprodukt Gmbh & Co. Kg Coating device with an allocated cleansing device
US4736704A (en) * 1983-12-23 1988-04-12 Universal Instruments Corporation Apparatus for applying solder masking to a circuit board
US4766839A (en) * 1984-12-13 1988-08-30 Rudolf Dunajtschik Drum with spray fitting for the production of dragees
WO1988010153A1 (en) * 1987-06-16 1988-12-29 Ransburg Corporation Spray coating device with a rotary spray organ
US5183066A (en) * 1991-04-02 1993-02-02 General Dynamics Corp., Air Defense Systems Division Spray nozzle cleaning apparatus and method
US5188255A (en) * 1990-09-07 1993-02-23 Du Benjamin R Method and apparatus for facilitating the cleaning of a spray aperture in a mixing chamber of a nozzle
US5226565A (en) * 1991-10-07 1993-07-13 The Dow Chemical Company Cleaning attachment for nozzles
US5296035A (en) * 1992-03-27 1994-03-22 Nordson Corporation Apparatus and method for applying coating material
US5344073A (en) * 1992-04-29 1994-09-06 Nordson Corporation Nozzle cleaning system including spray gun cover for can coating system
US5415337A (en) * 1993-11-04 1995-05-16 Nordson Corporation Method and apparatus for applying solder flux to a printed circuit
US5564877A (en) * 1995-01-10 1996-10-15 Reynolds Metals Company Liner machine for applying sealing compound to can ends
US5720850A (en) * 1995-06-19 1998-02-24 Nordson Corporation Process and device for the application of an adhesive
US5941456A (en) * 1997-06-17 1999-08-24 Nordson Corporation Nozzle cleaning system including coating spray gun cover for can coating system
US5970995A (en) * 1998-12-31 1999-10-26 Schy; William W. Kit for removing calcium deposits in a shower head without removing the shower head from a shower arm
WO2003015933A1 (es) * 2001-08-17 2003-02-27 Asm, S.A. Máquina de limpieza de boquillas con papel
US20040065752A1 (en) * 2001-01-31 2004-04-08 Mather Brian D. Powder spray gun mount and cleaning arrangements
US20040115346A1 (en) * 2002-09-23 2004-06-17 Woolley Scott J. Closure sealant dispenser
US20050158467A1 (en) * 2003-07-08 2005-07-21 Buckley Ian J. Variable fluid dispenser
US20060169717A1 (en) * 2005-01-31 2006-08-03 Sanyo Electric Co., Ltd. Beverage dispenser
DE202007013289U1 (de) 2007-09-21 2009-02-12 Langer, Peter, Dipl.-Ing. (FH) Flüssigkeitsdosiergerät mit Reinigungsvorrichtung
US20100049357A1 (en) * 2002-09-23 2010-02-25 Computrol, Inc. Rotary Machine with Separately Controllable Stations
WO2011009913A1 (de) * 2009-07-24 2011-01-27 Windmöller & Hölscher Kg Unterbindung von leimablagerungen an einer düsenplatte
US20110150700A1 (en) * 2009-12-11 2011-06-23 Laporta Thomas Showerhead cleaning and disinfecting system and method
US20150151320A1 (en) * 2013-11-29 2015-06-04 Mueller Martini Holding Ag Method for applying as flowable substance
DE102016000064A1 (de) 2016-01-06 2017-07-06 Baumer Hhs Gmbh Klebstoffauftragsvorrichtung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8732978B2 (en) * 2011-06-02 2014-05-27 Yuji Richard Kuan Drying silicon particles and recovering solvent

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2028355A (en) * 1935-06-07 1936-01-21 Hygrade Sylvania Corp Bulb spraying device
US3129112A (en) * 1961-11-15 1964-04-14 Gen Motors Corp Electrostatic coating operations
US3211377A (en) * 1963-06-28 1965-10-12 Grace W R & Co Method of prevention of nozzle fouling

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2028355A (en) * 1935-06-07 1936-01-21 Hygrade Sylvania Corp Bulb spraying device
US3129112A (en) * 1961-11-15 1964-04-14 Gen Motors Corp Electrostatic coating operations
US3211377A (en) * 1963-06-28 1965-10-12 Grace W R & Co Method of prevention of nozzle fouling

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4259372A (en) * 1978-07-13 1981-03-31 Phillips Petroleum Company Method and apparatus for applying sealant to a seam in a container
US4387002A (en) * 1980-03-29 1983-06-07 Maschinenfabrik Alfred Schmermund Gmbh & Co. Adhesive discharge device
US4357005A (en) * 1980-12-08 1982-11-02 Lear Siegler, Inc. Support for seat pad
US4408562A (en) * 1981-12-21 1983-10-11 Mactron, Inc. Apparatus for applying a coating to a moving surface
US4596205A (en) * 1983-04-27 1986-06-24 Driam Metallprodukt Gmbh & Co. Kg Coating device with an allocated cleansing device
US4736704A (en) * 1983-12-23 1988-04-12 Universal Instruments Corporation Apparatus for applying solder masking to a circuit board
US4517917A (en) * 1984-04-26 1985-05-21 Valco Cincinnati, Inc. Blow-off manifold for preventing trailing from a non-contact extrusion adhesive application valve
US4766839A (en) * 1984-12-13 1988-08-30 Rudolf Dunajtschik Drum with spray fitting for the production of dragees
WO1988010153A1 (en) * 1987-06-16 1988-12-29 Ransburg Corporation Spray coating device with a rotary spray organ
US5188255A (en) * 1990-09-07 1993-02-23 Du Benjamin R Method and apparatus for facilitating the cleaning of a spray aperture in a mixing chamber of a nozzle
US5183066A (en) * 1991-04-02 1993-02-02 General Dynamics Corp., Air Defense Systems Division Spray nozzle cleaning apparatus and method
US5226565A (en) * 1991-10-07 1993-07-13 The Dow Chemical Company Cleaning attachment for nozzles
US5296035A (en) * 1992-03-27 1994-03-22 Nordson Corporation Apparatus and method for applying coating material
US5455067A (en) * 1992-03-27 1995-10-03 Nordson Corporation Apparatus and method for applying coating material
US5344073A (en) * 1992-04-29 1994-09-06 Nordson Corporation Nozzle cleaning system including spray gun cover for can coating system
US5405087A (en) * 1992-04-29 1995-04-11 Nordson Corporation Nozzle cleaning system including spray gun cover for can coating system
US5415337A (en) * 1993-11-04 1995-05-16 Nordson Corporation Method and apparatus for applying solder flux to a printed circuit
US5564877A (en) * 1995-01-10 1996-10-15 Reynolds Metals Company Liner machine for applying sealing compound to can ends
US5720850A (en) * 1995-06-19 1998-02-24 Nordson Corporation Process and device for the application of an adhesive
EP0887114A3 (en) * 1997-06-17 1999-10-06 Nordson Corporation Nozzle cleaning system
US5941456A (en) * 1997-06-17 1999-08-24 Nordson Corporation Nozzle cleaning system including coating spray gun cover for can coating system
US5970995A (en) * 1998-12-31 1999-10-26 Schy; William W. Kit for removing calcium deposits in a shower head without removing the shower head from a shower arm
US7172138B2 (en) * 2001-01-31 2007-02-06 Nordson Corporation Powder spray gun mount and cleaning arrangements
US20040065752A1 (en) * 2001-01-31 2004-04-08 Mather Brian D. Powder spray gun mount and cleaning arrangements
WO2003015933A1 (es) * 2001-08-17 2003-02-27 Asm, S.A. Máquina de limpieza de boquillas con papel
ES2197765A1 (es) * 2001-08-17 2004-01-01 Asm S A Maquina de limpieza de boquillas con papel.
US20070110896A1 (en) * 2002-09-23 2007-05-17 Computrol, Inc. Closure sealant dispenser
US20100049357A1 (en) * 2002-09-23 2010-02-25 Computrol, Inc. Rotary Machine with Separately Controllable Stations
US7179333B2 (en) 2002-09-23 2007-02-20 Computrol, Inc. Closure sealant dispenser
US20040115346A1 (en) * 2002-09-23 2004-06-17 Woolley Scott J. Closure sealant dispenser
US8261631B2 (en) 2002-09-23 2012-09-11 Computrol, Inc. Rotary machine with separately controllable stations
US20050158467A1 (en) * 2003-07-08 2005-07-21 Buckley Ian J. Variable fluid dispenser
US7592033B2 (en) 2003-07-08 2009-09-22 Computrol, Inc Variable fluid dispenser
US20090294472A1 (en) * 2004-07-08 2009-12-03 Computrol, Inc. Fluid Dispensing Actuator
US20060169717A1 (en) * 2005-01-31 2006-08-03 Sanyo Electric Co., Ltd. Beverage dispenser
US7735687B2 (en) * 2005-01-31 2010-06-15 Sanyo Electric Co., Ltd. Beverage dispenser
DE202007013289U1 (de) 2007-09-21 2009-02-12 Langer, Peter, Dipl.-Ing. (FH) Flüssigkeitsdosiergerät mit Reinigungsvorrichtung
WO2011009913A1 (de) * 2009-07-24 2011-01-27 Windmöller & Hölscher Kg Unterbindung von leimablagerungen an einer düsenplatte
US20110150700A1 (en) * 2009-12-11 2011-06-23 Laporta Thomas Showerhead cleaning and disinfecting system and method
US20150151320A1 (en) * 2013-11-29 2015-06-04 Mueller Martini Holding Ag Method for applying as flowable substance
US10183307B2 (en) * 2013-11-29 2019-01-22 Mueller Martini Holding Ag Method for applying a flowable substance
DE102016000064A1 (de) 2016-01-06 2017-07-06 Baumer Hhs Gmbh Klebstoffauftragsvorrichtung

Also Published As

Publication number Publication date
IT995407B (it) 1975-11-10
FR2200760A5 (it) 1974-04-19
CA985857A (en) 1976-03-23
DE2347189A1 (de) 1974-03-28
GB1450170A (en) 1976-09-22
ZA737474B (en) 1974-08-28
BE805182A (fr) 1974-01-16

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BANKERS TRUST COMPANY, 280 PARK AVENUE, NEW YORK,

Free format text: SECURITY INTEREST;ASSIGNOR:SILGAN CONTAINERS CORPORATION, A CORP. OF DE.;REEL/FRAME:005063/0550

Effective date: 19890301