WO2002047824A1 - Method and device for applying a coating - Google Patents

Method and device for applying a coating Download PDF

Info

Publication number
WO2002047824A1
WO2002047824A1 PCT/US2001/030865 US0130865W WO0247824A1 WO 2002047824 A1 WO2002047824 A1 WO 2002047824A1 US 0130865 W US0130865 W US 0130865W WO 0247824 A1 WO0247824 A1 WO 0247824A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
gas
throat
downstream
powder
Prior art date
Application number
PCT/US2001/030865
Other languages
French (fr)
Inventor
William P. Rusch
Original Assignee
Sulzer Metco (Us) Inc.
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 Sulzer Metco (Us) Inc. filed Critical Sulzer Metco (Us) Inc.
Publication of WO2002047824A1 publication Critical patent/WO2002047824A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/08—Flame spraying
    • B05D1/10—Applying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/1606—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air
    • B05B7/1613—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed
    • B05B7/162—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed
    • B05B7/1626—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed at the moment of mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/12—Applying particulate materials

Definitions

  • the present invention relates to a method and device for producing
  • Patent 5,302,414 are hereby incorporated by reference.
  • the present invention is an improvement on the method and apparatus
  • Another purpose of the present invention is to
  • gas is provided to the inlet of a nozzle that has a converging portion followed by a
  • inventions are achieved by injecting powder into the low pressure gas stream downstream
  • thermo spray heater is incorporated into the thermal spray device upstream of the nozzle.
  • the powder injection is
  • This angling of the powder injection reduces the wear on the nozzle.
  • Fig. 1 is a schematic of the device according to the invention.
  • the gas is inlet at a pressure of 250 to 600 PSI and preferably 500
  • the gas heating section has a heater that heats the cold gas from a temperature of
  • the heating section 1 is followed by the converging/diverging nozzle 2
  • the length of the straight sections is .010" to 1.00" inches long
  • a powder inlet 3 feeds powdered material after throat section of the nozzle
  • the angle is preferably at an acute angle to the longitudinal axis of the nozzle. The angle is
  • the nozzle further comprises an elongated
  • elongated duct is 1 to 12 inches long and more preferably 4 to 8 inches long and has a

Abstract

An apparatus and method for applying a coating to an article uses a nozzle (2) having a converging portion and a diverging portion downstream thereof forming a throat (21) therebetween. A gas inlet (11) is upstream of the converging portion of the nozzle (2) for receiving a supply of high pressure gas and a powder inlet (3) introduces a powdered feed material into a gas stream in the nozzle (2) downstream of the throat (21). A gas heater (1) heats the gas stream from the gas inlet (11) upstream of the converging portion.

Description

METHOD AND DEVICE FOR APPLYING A COATING
BACKGROUND OF THE INVENTION
The present invention relates to a method and device for producing
thermal sprayed coatings.
Methods and devices of this type are known from U.S. Patent 5,302,414
directed to a gas dynamic spraying method for applying a coating. The contents of U.S.
Patent 5,302,414 are hereby incorporated by reference.
The present invention is an improvement on the method and apparatus
shown in the aforementioned patent in order to lower the pressure required to introduce
powder into a high pressure gas stream. Another purpose of the present invention is to
deliver higher temperature gas to the nozzle resulting in less heat loss and higher gas
velocities.
SUMMARY OF THE INVENTION
In the method and apparatus of the aforementioned patent, a high pressure
gas is provided to the inlet of a nozzle that has a converging portion followed by a
diverging portion and forming a throat therebetween. In accordance with the present invention, the objects of the present
invention are achieved by injecting powder into the low pressure gas stream downstream
from the nozzle throat.
In accordance with another embodiment of the present invention, a gas
heater is incorporated into the thermal spray device upstream of the nozzle.
In a further embodiment of the present invention, the powder injection is
at an angle to the longitudinal access of the nozzle, and in particular, at an acute angle.
This angling of the powder injection reduces the wear on the nozzle.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic of the device according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
Referring now to Fig. 1, the device for applying a coating and for carrying
out the method of the present invention comprises a gas heating section 1 having a high
pressure gas inlet 11. The gas is inlet at a pressure of 250 to 600 PSI and preferably 500
PSI. The gas heating section has a heater that heats the cold gas from a temperature of
from 0°C to 300°C.
The heating section 1 is followed by the converging/diverging nozzle 2
that has a throat 21 with a straight section 22 between the converging and diverging portions of the nozzle. The length of the straight sections is .010" to 1.00" inches long
and preferably .020" to .100" inches long and has a diameter of .156".
A powder inlet 3 feeds powdered material after throat section of the nozzle
and is preferably at an acute angle to the longitudinal axis of the nozzle. The angle is
preferably 20-80° and most preferably 45°. The nozzle further comprises an elongated
duct 4 which confines the accelerating particles in the high velocity gas stream. The
elongated duct is 1 to 12 inches long and more preferably 4 to 8 inches long and has a
diameter of .343".
As a result of these features, there is reduced pressure in the powder
feeder, there is no wear in the convergmg/divergmg nozzle and the device allows the use
of high pressure gas with conventional and commercially available powder feeders.

Claims

What is claimed is:
1. An apparatus for applying a coating to an article comprising:
a nozzle having a converging portion and a diverging portion downstream
thereof forming a throat therebetween;
a gas inlet upstream of the converging portion of said nozzle for receiving
a supply of high pressure gas;
a powder inlet for introducing a powdered feed material into a gas stream
in the nozzle downstream of the throat; and
a gas heater for heating the gas stream from the gas inlet upstream of the
converging portion.
2. The apparatus of claim 1, wherein the nozzle further comprising an
elongated duct downstream of the diverging portion of said nozzle and positioned parallel
to a longitudinal axis of said nozzle.
3. The apparatus of claim 1, wherein said powder inlet is disposed at an
acute angle to a longitudinal axis of the nozzle.
4. The apparatus of claim 1, wherein the nozzle throat comprises a
straight section.
5. A method for applying a coating to an article, comprising the steps of: streaming a high pressure gas at high velocity through a nozzle having a
converging portion and a diverging portion downstream thereof forming a throat
therebetween;
introducing powder into the gas stream in the nozzle downstream of the
throat; and
heating the gas stream upstream of the converging portion.
6. The method of claim 5, wherein the step of introducing said powder
comprises feeding the powder at an acute angle to a longitudinal axis of the nozzle.
7. The method of claim 1, further comprising passing the gas stream
through an elongated duct downstream of the diverging portion.
8. The method of claim 1, wherein the throat comprises a straight section.
PCT/US2001/030865 2000-12-13 2001-10-02 Method and device for applying a coating WO2002047824A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/735,832 2000-12-13
US09/735,832 US20020071906A1 (en) 2000-12-13 2000-12-13 Method and device for applying a coating

Publications (1)

Publication Number Publication Date
WO2002047824A1 true WO2002047824A1 (en) 2002-06-20

Family

ID=24957368

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/030865 WO2002047824A1 (en) 2000-12-13 2001-10-02 Method and device for applying a coating

Country Status (2)

Country Link
US (1) US20020071906A1 (en)
WO (1) WO2002047824A1 (en)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10126100A1 (en) * 2001-05-29 2002-12-05 Linde Ag Production of a coating or a molded part comprises injecting powdered particles in a gas stream only in the divergent section of a Laval nozzle, and applying the particles at a specified speed
US20030039856A1 (en) 2001-08-15 2003-02-27 Gillispie Bryan A. Product and method of brazing using kinetic sprayed coatings
US6685988B2 (en) * 2001-10-09 2004-02-03 Delphi Technologies, Inc. Kinetic sprayed electrical contacts on conductive substrates
US6896933B2 (en) * 2002-04-05 2005-05-24 Delphi Technologies, Inc. Method of maintaining a non-obstructed interior opening in kinetic spray nozzles
US6811812B2 (en) * 2002-04-05 2004-11-02 Delphi Technologies, Inc. Low pressure powder injection method and system for a kinetic spray process
US7476422B2 (en) 2002-05-23 2009-01-13 Delphi Technologies, Inc. Copper circuit formed by kinetic spray
US20030219542A1 (en) * 2002-05-25 2003-11-27 Ewasyshyn Frank J. Method of forming dense coatings by powder spraying
US7108893B2 (en) * 2002-09-23 2006-09-19 Delphi Technologies, Inc. Spray system with combined kinetic spray and thermal spray ability
US6924249B2 (en) * 2002-10-02 2005-08-02 Delphi Technologies, Inc. Direct application of catalysts to substrates via a thermal spray process for treatment of the atmosphere
US20040065432A1 (en) * 2002-10-02 2004-04-08 Smith John R. High performance thermal stack for electrical components
US20040142198A1 (en) * 2003-01-21 2004-07-22 Thomas Hubert Van Steenkiste Magnetostrictive/magnetic material for use in torque sensors
US6872427B2 (en) * 2003-02-07 2005-03-29 Delphi Technologies, Inc. Method for producing electrical contacts using selective melting and a low pressure kinetic spray process
US6871553B2 (en) * 2003-03-28 2005-03-29 Delphi Technologies, Inc. Integrating fluxgate for magnetostrictive torque sensors
US7125586B2 (en) * 2003-04-11 2006-10-24 Delphi Technologies, Inc. Kinetic spray application of coatings onto covered materials
US20050040260A1 (en) * 2003-08-21 2005-02-24 Zhibo Zhao Coaxial low pressure injection method and a gas collimator for a kinetic spray nozzle
US7351450B2 (en) * 2003-10-02 2008-04-01 Delphi Technologies, Inc. Correcting defective kinetically sprayed surfaces
US7335341B2 (en) * 2003-10-30 2008-02-26 Delphi Technologies, Inc. Method for securing ceramic structures and forming electrical connections on the same
US7024946B2 (en) * 2004-01-23 2006-04-11 Delphi Technologies, Inc. Assembly for measuring movement of and a torque applied to a shaft
US7475831B2 (en) * 2004-01-23 2009-01-13 Delphi Technologies, Inc. Modified high efficiency kinetic spray nozzle
US20050214474A1 (en) * 2004-03-24 2005-09-29 Taeyoung Han Kinetic spray nozzle system design
US20060038044A1 (en) * 2004-08-23 2006-02-23 Van Steenkiste Thomas H Replaceable throat insert for a kinetic spray nozzle
US20060040048A1 (en) * 2004-08-23 2006-02-23 Taeyoung Han Continuous in-line manufacturing process for high speed coating deposition via a kinetic spray process
SE529058C2 (en) * 2005-07-08 2007-04-17 Plasma Surgical Invest Ltd Plasma generating device, plasma surgical device, use of a plasma surgical device and method for forming a plasma
SE529053C2 (en) 2005-07-08 2007-04-17 Plasma Surgical Invest Ltd Plasma generating device, plasma surgical device and use of a plasma surgical device
SE529056C2 (en) 2005-07-08 2007-04-17 Plasma Surgical Invest Ltd Plasma generating device, plasma surgical device and use of a plasma surgical device
US20070074656A1 (en) * 2005-10-04 2007-04-05 Zhibo Zhao Non-clogging powder injector for a kinetic spray nozzle system
CN100446870C (en) * 2005-10-31 2008-12-31 宝山钢铁股份有限公司 Cold air dynamical spray-painting method and apparatus of delivering powder through down stream
US7674076B2 (en) * 2006-07-14 2010-03-09 F. W. Gartner Thermal Spraying, Ltd. Feeder apparatus for controlled supply of feedstock
WO2008031185A1 (en) * 2006-09-13 2008-03-20 Doben Limited Nozzle assembly for cold gas dynamic spray system
US7928338B2 (en) * 2007-02-02 2011-04-19 Plasma Surgical Investments Ltd. Plasma spraying device and method
CA2677619C (en) * 2007-02-12 2014-03-25 Doben Limited Adjustable cold spray nozzle
JP5171125B2 (en) * 2007-06-25 2013-03-27 プラズマ技研工業株式会社 Nozzle for cold spray and cold spray device using the nozzle for cold spray
US7589473B2 (en) * 2007-08-06 2009-09-15 Plasma Surgical Investments, Ltd. Pulsed plasma device and method for generating pulsed plasma
US8735766B2 (en) * 2007-08-06 2014-05-27 Plasma Surgical Investments Limited Cathode assembly and method for pulsed plasma generation
US9168546B2 (en) 2008-12-12 2015-10-27 National Research Council Of Canada Cold gas dynamic spray apparatus, system and method
US8613742B2 (en) * 2010-01-29 2013-12-24 Plasma Surgical Investments Limited Methods of sealing vessels using plasma
FR2959945B1 (en) * 2010-05-11 2012-08-03 Lifcoat Technologies ASSEMBLY FOR PAINTING PARTS
US9089319B2 (en) 2010-07-22 2015-07-28 Plasma Surgical Investments Limited Volumetrically oscillating plasma flows
CN102814248B (en) * 2012-08-01 2014-12-10 中国船舶重工集团公司第七二五研究所 Nozzle for axial siphon powder delivering type cold spray
CA3191050A1 (en) 2020-08-28 2022-03-03 Nikolay Suslov Systems, methods, and devices for generating predominantly radially expanded plasma flow

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5573682A (en) * 1995-04-20 1996-11-12 Plasma Processes Plasma spray nozzle with low overspray and collimated flow

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5573682A (en) * 1995-04-20 1996-11-12 Plasma Processes Plasma spray nozzle with low overspray and collimated flow

Also Published As

Publication number Publication date
US20020071906A1 (en) 2002-06-13

Similar Documents

Publication Publication Date Title
US20020071906A1 (en) Method and device for applying a coating
US7637441B2 (en) Cold gas spray gun
US6623796B1 (en) Method of producing a coating using a kinetic spray process with large particles and nozzles for the same
EP1200200B2 (en) Kinetic spray coating method and apparatus
US20060038044A1 (en) Replaceable throat insert for a kinetic spray nozzle
JP4989859B2 (en) Cold spray nozzle and cold spray apparatus and method using the same
KR20080013757A (en) High performance kinetic spray nozzle
US6861101B1 (en) Plasma spray method for applying a coating utilizing particle kinetics
US4866240A (en) Nozzle for plasma torch and method for introducing powder into the plasma plume of a plasma torch
US6569245B2 (en) Method and apparatus for applying a powder coating
EP1579921A2 (en) Improved kinetic spray nozzle system design
EP1888803B1 (en) Apparatus for gas-dynamic applying coatings and method of coating
US20100143700A1 (en) Cold spray impact deposition system and coating process
US20040018317A1 (en) Process and device for high-speed flame spraying
CA2270260A1 (en) Apparatus for gas-dynamic coating
WO2005072249A2 (en) A modified high efficiency kinetic spray nozzle
CN100446870C (en) Cold air dynamical spray-painting method and apparatus of delivering powder through down stream
KR100776194B1 (en) Nozzle for cold spray and cold spray apparatus using the same
US20090256010A1 (en) Cold gas-dynamic spray nozzle
EP1508379B1 (en) Gas collimator for a kinetic powder spray nozzle
WO2007091102A1 (en) Kinetic spraying apparatus and method
WO2009124839A3 (en) Cold gas spraying system
CN101417274A (en) Kinetic spray-painting gun using powder preparation coatings
CN101896314B (en) Dry ice blasting device
US8906450B1 (en) Cold spray system nozzle

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA JP

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP