WO1987002278A1 - Procede et appareil d'enduction par projection - Google Patents

Procede et appareil d'enduction par projection Download PDF

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Publication number
WO1987002278A1
WO1987002278A1 PCT/US1985/001974 US8501974W WO8702278A1 WO 1987002278 A1 WO1987002278 A1 WO 1987002278A1 US 8501974 W US8501974 W US 8501974W WO 8702278 A1 WO8702278 A1 WO 8702278A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow
annular
passage
radially outwards
orifices
Prior art date
Application number
PCT/US1985/001974
Other languages
English (en)
Inventor
James Reimer
Original Assignee
Plastic Flamecoat Systems, 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
Priority to US06/649,836 priority Critical patent/US4632309A/en
Application filed by Plastic Flamecoat Systems, Inc. filed Critical Plastic Flamecoat Systems, Inc.
Priority to EP19850905283 priority patent/EP0241457A1/fr
Priority to PCT/US1985/001974 priority patent/WO1987002278A1/fr
Publication of WO1987002278A1 publication Critical patent/WO1987002278A1/fr

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Classifications

    • 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
    • B05B7/20—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 by flame or combustion
    • B05B7/201—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 by flame or combustion downstream of the nozzle
    • B05B7/205—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 by flame or combustion downstream of the nozzle the material to be sprayed being originally a particulate material

Definitions

  • This invention relates to methods and apparatus for projecting molten particles, and, more particularly, to methods and spray apparatus for providing a surface coating of plastic or the like on a desired object.
  • a powdered thermoplastic is heated to its melting point, such as by an oxy-propane flame.
  • the resultant material is then propelled against the article to be coated by means of a jet of propelling air, whereupon the molten material fuses to form the desired surface coating.
  • the methods and apparatus of the present invention are for the application of a flame spray coating of molten particles, preferably of a powdered thermoplastic variety.
  • a flame spray gun is comprised of three components - a generally cylindrical body, a hood disposed on the distal end of the body, and a nozzle assembly extending partially within the hood and body, said body, hood, and nozzle assembly being coaligned along a common longitudinal axis.
  • the body has an internal surface defining a first passage extending along the axis through the body and distal and proximal end portions. Disposed in the distal portion of the body is a first bore having a generally annular ring-shape disposed radially outwards of and about said first passage and a second bore, also of an annular ring-shape disposed radially outwards of and about the first passage and the first bore.
  • first, second, third, and fourth ports At the proximal end of the body are first, second, third, and fourth ports, the first port being in fluid communication with the first passage. Also disposed within the body are second, third and fourth cylindrical passageways. The second passage is in fluid communication between the second port and the first bore, the third passage is in fluid communication between the third port and the second bore, and the fourth passage is in fluid communication between the fourth port and the first passage.
  • the nozzle assembly is comprised of a generally cylindrical member disposed at least partially within the first passage and having a nozzle bore therethrough.
  • the cylindrical member has an outer surface which defines with the internal surface of the body defining the first passage a space within the first passage between the internal surface of the body and the outer surface of the cylindrical member.
  • the hood With respect to the hood, it is of a generally hollow cylindrical shape defined by a cylindrical wall and has a plate internal thereof extending transversely intermediate both ends of the wall so as to define a combustion and mixing chamber internal of the hood.
  • the plate of the hood mounts flush up against the distal end of the body. Extending through the plate is a central aperture in coalignment with the longtudinal axis, first orifices disposed radially outwards of and about the central aperture and defining a first circle, and second orifices disposed radially outwards of and about the central aperture and the first orifices defining a second circle.
  • The, central aperture, first orifices, and second orifices are in fluid communication with the first passage, the first bore, and second bore, respectively.
  • the cylindrical wall defines a plurality of holes extending therethrough which lie in a plane perpendicular to the axis and are aligned toward the axis and provide fluid communication from the chamber through the wall to locations radially outwards of and about the wall.
  • the second orifices slant radially inwards toward the longitudinal axis of the gun whereas the first orifices are aligned to face in a direction substantially parallel to the axis.
  • a central flow of powdered feedstock is established along the longitudinal axis through the central bore of the nozzle assembly.
  • a first annular ring-shaped flow of compressed propelling air is introduced into the fourth port, this first flow being radially outwards of and about the central flow and exiting through the space between the nozzle tip and the central aperture of the plate.
  • a second annular flow, also of an annular ring-shape radially outwards of and about the central flow and the first annular flow is established by introducing burn air into the second port. This air will exit through the first orifices in the plate.
  • a third annular flow, also of an annular ring- shape radially outwards of and about the central flow and the first and second annular flows is established by introducing an inflammable gas such as propane through the third port, whereby the gas is introduced into the chamber through the second orifices.
  • a fourth annular fluid flow is established substantially perpendicular to and toward the longitudinal axis radially outwards of and about the central flow and the first, second, and third annular flows by means of ambient air radially outwards from the hood entering through the holes in the hood into the chamber.
  • Figure 1 is a side view partially in section and partially in schematic of the present invention.
  • Figure 2 is an end view of the body of the spray gun of the present invention depicted in Figure 1.
  • Figure 3 is another end of the body of the spray gun of the present invention depicted in Figure 1.
  • Figure 4 is a side view in section of the body of the spray gun of the present invention taken along section line 4-4 of Figure 3.
  • Figure 5 is another side view of the body of the spray gun of the present invention depicted in Figure 1 taken along section line 5-5 of Figure 2.
  • Figure 6 is an end view of the hood of the spray gun of the present invention depicted in Figure 1.
  • Figure 7 is an end view of the nozzle assembly of the spray gun of the present invention depicted in Figure 1.
  • FIG. 1 there will be seen depicted therein a side view in cross-section of a spray gun 10 interconnected to additional apparatus employed in the operation of the gun 10.
  • This apparatus includes a source of pressurized atmospheric air 11 interconnected by means of a supply hose 15 to a plurality of conventional air pressure regulators 14, 16, and 18.
  • Regulators 16 and 18 have respective supply hoses 24 and 28 delivering pressurized air regulated by their respective settings to the gun 10.
  • Regulator 14 has interconnected thereto a supply hose 22 which delivers regulated air pressure to a hopper 12.
  • Hopper 12 is filled with a powdered thermoplastic or the like as indicated by the arrow 12 which passes through an eductor 12A, whereupon it is forced by an eductor action caused by the pressurized air from the supply hose 22 to pass along supply hose 26 to the gun 10.
  • a source of propane or other appropriate fuel 13 is provided which is delivered by a supply hose 17 to regulator 20.
  • the regulated propane is thereafter delivered by means of supply hose 30 to the gun 10.
  • the gun 10 is preferably comprised of three main components - a body 32, hood 34, and nozzle assembly 36.
  • the body 32 will now be described in greater detail, followed by the hood 34 and nozzle assembly 36.
  • FIGS 2-5 depict the body 32 in various views, for purposes of clarity a convention will be adopted.
  • the side of each such component more proximal to the air and fuel connections as depicted in Figure 1 will be hereinafter referred to as the "proximal" side of the particular component for convenience, whereas the portions more distant therefrom along a central longitudinal axis 39 extending through the gun 10 will be referred to as the "distal" portion of the particular component.
  • the body 32 has a distal and proximal portion thereof 38 and 40.
  • the body 32 is preferably provided with a longitudinal first central passage 44 extending entirely therethrough in the general direction of the axis 39.
  • a first annular ring bore 46 is disposed in the distal end 38 of the body 32 radially outwards of and about axis 39.
  • a second annular ring bore 48 is disposed in the distal end 38 or face of the body 32 which is radially outwards of the central passage 44 and the first bore 46.
  • first and second bores 44, 46, and 48 will accordingly define in the distal end 38 of the body 32, a first inner annular ring, a second intermediate annular ring, and a third outer annular ring 50, 52, and 54, respectively, each of which is in the form of a hollow cylinder.
  • first ring 50 will be disposed radially outwards of the central passage 44
  • second ring 52 will be disposed radially outwards of the first ring 50
  • the third ring 54 will be disposed radially outwards from the second ring 52.
  • the body 32 will further preferably include threads 53 on the outer periphery of the distal end 38 of the body 32. Reference back to Figure 1 will indicate that the purpose of such threads 53 is so as to threadedly receive mating threads 55 disposed internally of the hood 34 so as to retain the hood 34 fixedly about the body 32.
  • first, second, third and fourth threaded port 56, 58, 60, and 62 which are disposed in the proximal end 40 of the body 32.
  • Each such port has a corresponding threaded portion 57, 59, 61, and 63.
  • a second passage 64 preferably cylindrical in shape, will be disposed internally of and through the body 32 terminating at its distal end with first bore 46 and at its proximal end with second port 58. In this manner, fluid communication will be established through second port 58, second passage 64, to first ring bore 46.
  • third passage 66 again preferably of a cylindrical configuration, will be disposed through body 32 terminating distally in third ring bore 48 and terminating at its proximal end in second threaded port 60 so as to again establish fluid communication from port 60 through third passage 66 to second ring bore 48.
  • Figure 4 reveals yet an additional bore internal of the body 32 which will hereinafter be referred to as fourth passage 68.
  • This passage 68 will preferably be disposed within the body 32 to interconnect fourth port 62 and first passage 44 and will, in like manner to passages 44, 64, and 66, preferably be in a generally cylindrical shape.
  • fourth passage 68 rather than terminating at the distal end 38 of the body 34, preferably terminates intermediate of the proximal and distal ends 40 and 38 at the first passage 44.
  • the hood 34 is comprised generally of an outer wall 70 having a generally cylindrical shape and a circular plate member 76 internal thereof.
  • the plate member 76 is disposed intermediate of the distal and proximal ends 72 and 74 of the wall 70 and interconnects with the inner surface of the wall 70 so as to define a combustion and mixing chamber internal of the wall 70. Still referring to the plate member 76, it will preferably lie in a transverse plane generally perpendicular to the axis 39.
  • the wall 70 On the internal surface of the wall 70 on its proximal end 74, the wall 70 will, as aforementioned, preferably include an internal threaded portion 55. In this manner when the body 32 and hood 34 are disposed in coaxial alignment about axis 39, the threads 53 of body 32 receive the threads 55 of hood 34 in mating engagement so as to retainedly hold the hood 34 on the body 32.
  • the plate 76 defines a central aperture 86 extending therethrough centered about axis 39 when the components of the g ⁇ n are in assembly. Disposed radially outward from the central aperture 86 through plate 76 is a plurality of orifices 88 spatially positioned about the central aperture 86. In a preferred embodiment, these orifices 88 will lie on the circumference of a first circle 96 each being spaced equidistant from adjacent orifices on the circle, the circle of which has a first radius 92, having a magnitude R 1 . From Figure 1, it will be noted that these orifices 88 extend through the plate 76 in a direction generally parallel to the longitudinal axis 39.
  • the orifices 90 will also preferably lie on a circle 98, each being spaced equidistant from adjacentmost orifices on either side thereof on the circle 98.
  • This circle 98 will have a radius 94 with a magnitude R2, both radii R1 and R 2 being measured from the central axis 39 radially outwards.
  • these orifices 90 preferably are disposed through plate 76 so as to slant inward through the plate 76 pointing generally towards axis 39 when viewed from the proximal face 82 of the plate 76 toward the distal face 80 of the plate 76.
  • these orifices 90 will be formed about central axes 101 defining an alpha angle 100 with respect to an axis 103 parallel to longitudinal axis 39, said angle being nominally about 60° and preferably within the range of 55°-65°.
  • a plurality of apertures 78 will be disposed through the wall 70 of the hood 34, each spaced equidistant from adjacent such apertures on either side thereof, and each such hole oriented generally towards central axis 39.
  • the purpose of such holes is to draw additional ambient air surrounding the hood 34 into the chamber 84 to eliminate eddy currents which interfere with the proper operation of the apparatus. More particularly, due to the high velocity fluids exiting the hood 34, this had a tendency to create low pressure zones adjacent the area of the intersection of the radially outwardmost distal face 80 of the plate 76 and the inner surface of the wall 70 of the hood.
  • radii 92 and 94 of the respective orifices 88 and 90 will be selected relative to the first and second bores 46 and 48 so that the orifices 88 align in a longitudinal direction parallel to axis 39 with the first bore 46, and so that the orifices 90, in like manner, align in a longitudinal direction also parallel to axis 39 with the second bore 48.
  • central aperture 86 will be coaligned with the longitudinal axis 39 so as to be in concentric alignment with the first passage 44 extending through the body 32.
  • the nozzle assembly 36 is preferably generally comprised of an elongate hollow cylindrical member 102 defining a cylindrical nozzle bore 104 extending in the longitudinal direction of axis 39 along the full extent of the nozzle assembly 36.
  • the nozzle assembly 36 will have a proximal end 106 and a distal end 108.
  • a threaded connector 110 interconnected to the cylindrical member 102 of the assembly 36 will be a threaded connector 110 having a threaded portion 112 and a ring-shaped shoulder 114.
  • a spacer 116 circumferentially about the cylinder member 102 is a spacer 116.
  • the spacer 116 will be seen to be preferably comprised of a ring-like configuration in three sections so as to define a space 118 between each section.
  • the nozzle assembly 36 is disposed generally within the first passage 44 of body 32, as shown in Figure 1, in coaxial alignment with the body 32 along longitudinal axis 39.
  • the threaded portion 112 of the threaded connector 110 portion of the assembly 36 will be matingly received by the correlative first port 56 disposed in the proximal end 40 of the body 32.
  • the shoulder 114 of the threaded connector 110 will eventually abut with the proximal face 115 of the body 32.
  • a function of the shoulder 114 is to limit movement of the distal tip 120 of the cylindrical member 102 whereby in assembly with the body 32 and hood 34, the tip 120 will be disposed through central aperture 86 in plate member 76. Moreover, upon such alignment, the tip 120, due to the limiting effect of the shoulder 114, will lie in a plane defined by the distal face 80 of the plate member 76.
  • FIG. 1 A close look at Figure 1 will indicate that upon such alignment of the body 32, hood 34, and nozzle assembly 36, the space 118 exists between the inner surface defining the first passage 44 through the body 32, and the outer surface of the cylindrical member 102 of the nozzle assembly 36.
  • a fluid circuit is thus defined from fourth port 62 through fourth passage 68 to the space 118, through space 118 about centralizing spacer 116 to the portion of the central aperture 86 radially, outwards from the outer surface of the cylindrical member 102 adjacent tip 120.
  • a function of the spacer 116 is to contact the inner surface defining the first passage 44 so as to centralize or align the tip 120 of the cylindrical member 102 in the center of central aperture 86 wnereby there is a ring-like portion of the aperture 86 extending circumferentially about the tip 120 in the plate 76.
  • the apparatus of the present invention will include additional threaded connectors 122, 124, and 126, which are matingly received by corresponding second, third, and fourth ports 58, 60, and 62.
  • Each connector 122-126 will include a shoulder, a threaded portion, and a hose nipple on the proximal side thereof for interconnection to respective hoses. More particularly, hose 24 will be slidingly disposed about the nipple of connector 122, hose 30 will be disposed about the nipple of connector 124, hose 28 will be disposed about the nipple of connector 126, and hose 26 will be disposed about the nipple of connector 110.
  • Respective hose clamps 123 125, 127, and 129 will be placed about the respective hose and nipple interconnections on connectors 122, 124, 126, and 114 and cinched up so as to effect a fluid tight connection.
  • a hopper 12 is provided for receiving a powderized form of thermoplastic product or like material to be applied to a desired article.
  • Typical products may include Rilsan Nylon 11, Marlex ® resins, Levasint ® , and Corvel ® products commercially available from the Rilson Corporation, Phillips Petroleum Corporation, Bayer Corporation, and the Polymer Corporation, respectively.
  • the methods and apparatus of the present invention admit to use of a number of feedstock materials to be placed into the hopper 12, and accordingly, the invention is not intended to be so limited to the products herein listed.
  • any powderized plastic feedstock having the properties of thermal setting or thermal plastic may be employed with good effect without departing from the spirit and scope of the invention such as polyethylene.
  • the feedstock will preferably have a particle mesh size between 80-100 mesh.
  • Some typical commercial feedstocks will have already added thereto a number of additives which will render the feedstock more suitable to the application hereindescribed, such as the aforementioned Levasint ® and Rilsan materials.
  • additives counteracting the adverse effect of light on the plastic such as UV Stabilizer 531, or an additive such as Ergonox 1010 for improving the properties of the feedstock in the presence of heat, both such additives being commercially available from the Cybageigy Company.
  • additives counteracting the adverse effect of light on the plastic
  • an additive such as Ergonox 1010 for improving the properties of the feedstock in the presence of heat
  • a first annular fluid flow in the form of an annular ring has been established of powder conveying air exiting the space between the outer surface of the tip 120 and the surface of the plate defining central aperture 86.
  • a second annular fluid flow radially outwards of and about the central flow and the first annular flow, also of an annular ring-shape, has been established from compressed air flowing out the first orifices 88 and in the general direction of the longitudinal axis 39.
  • a third annular fluid flow also of a ring-like annular shape radially outwards of and about the central flow and the first and second annular flows is established by the flow of propane or other inflammable gas through the second ori f ices 90.
  • these orifices 90 preferably are aligned in a general direction pointing towards or oblique to the longitudinal axis 39, unlike the first orifices which have axes generally parallel to axis 39. Accordingly, the third annular flow through orifices 90 will be directed toward the central flow, and the first and second annular flows.
  • a fourth fluid flow will thus be established through the holes 78 in the hood 34.
  • This fourth flow will be substantially perpendicular to and in the general direction of the axis 39 and will commence from locations radially outwards of and about the central flow, and the first, second, and third annular flows.
  • propane through orifices 90 will mix with burn air flowing through orifices 88 to effect an efficient and appropriate flame for melting the powderized plastic being expelled in the central flow through the central orifice 104.
  • This melted plastic will be propelled outwards of the hood 70 by means of the fluid flow through central aperture 86.
  • compressed air passing through hose 22 will, by means of eductor action in eductor 12A, cause powder in the hopper 12 to pass along hose 26 through nozzle bore 104 into chamber 84. This powder as it exits the tip 120 will be propelled into the chamber 84 by means of the propelling air travelling through hose 28, space
  • the powder conveying air it is desirable for the powder conveying air to be delivered at a higher pressure.
  • the powderized plastic need not remain in the chamber 84 as long due to its low melting point, and consequently a higher pressure conveying air will force the melted plastic out of the chamber 84 in a quicker fashion so as to avoid burning and the like.
  • a conventional gas regulator will be installed upon the propane tank 13 or other source of fuel. It has been found that whereas propane appears to be particularly convenient, other sources of fuel for flame heat will work equally as wel l and may include , for example , butane . This interconnection between the fuel source 13 and the regulator 20 may be seen designated schematically as interconnection by hose 17.
  • a length of hose 30 is interconnected between the fuel regulator 20 and the connector 124 of the gun 10.
  • a source of compressed atmospheric air 11 will be interconnected to its respective regulators 14, 16, and 18 by means of supply hose 15.
  • This compressed air source preferably delivers a minimum of 10 cfm at 50 psig and may be in the form of any readily available commercial air compressor.
  • the hose 22 is interconnected between regulator 14 and eductor 12A, and hoses 24, 26, and 28 are connected, respectively, between regulator 16 and connector 122, eductor 12A and connector 114, and between regulator 18 and connector 126.
  • the hopper 12 is thereafter filled with the feedstock powder such as one of the commercially available powders hereinbefore described.
  • valve on the fuel tank 13 is opened and regulator 20 set to a point whereby the regulator 20 registers a pressure of 1.5 psig.
  • the valve on the fuel tank 13 is then closed so as to prevent flow of propane fuel at the regulated pressure until the other regulators are set.
  • the valve on the compressed air tank 11 is thereafter opened and the flame or burn air flowing through hose 24 adjusted by means of the regulator 16 so as to be at a nominal 2.0 psig.
  • the flow valve on the hose 15 to compressed air source 11 still open, next the propelling air flowing through hose 28 is adjusted by means of regulator 18 to a nominal setting of 10.0 psig.
  • the second propane tank 13 valve is again opened and the gun 10 is ignited by means of placing any convenient source of igniting heat adjacent the chamber 84 such as a welder's spark.
  • the powder conveying air is regulated by means of regulator 14 so that the regulator 14 registers at 3.0 psig.
  • the propelling air through hose 28 is thence regulated by regulator 18 so as to produce a smooth even flame, whereupon the apparatus is thus adjusted for application of the coating.
  • the flame extending outwards from the chamber 84 and away from the gun will thereafter be positioned such that it is preferably perpendicular to the surface of the article to be coated with the tip of the flame approximately 1 inch from the surface, whereupon the gun is thereafter moved in any desired pattern to effect the proper coating.
  • compressed air may be utilized for the burn air, thus obviating the need for a source of substantially pure oxygen as the burn air (as was conventional with prior devices).
  • the present invention is not intended to be so limited and, accordingly, it is believed that if desired, a source of oxygen could be substituted for the atmospheric compressed air source 11.
  • the relative placement and dimensions of the tip 120, and apertures 104, 86, 88, 90, and 78, and their interrelation to other dimensions of the spray gun 10 are thought to be of some importance.
  • the alpha angle 100 which the orifices 90 define has been disclosed to be nominally approximately 60°. However, it is felt that successful operation may be achieved if such angle is within a range of about 55° to 65° as previously noted.
  • the propane gas stream is directed more closely to the source of burn air exiting orifices 88, thus changing the angle at which the two flow streams of burn air and propane gas impinge upon one another (i.e., the flow of the propane is directed at an angle increasingly more towards the normal with respect to the flow of the burn air). It has been found that such an increased angle will frequently cause a blowout of the flame gun wherein it is rendered inoperable. In order to attempt to alleviate this problem with such a greatly increased angle 100, even if the pressure of the propane is reduced by means of regulator 20, it has been found that insufficient fuel gas is thus provided for successful operation of the apparatus.
  • the orifices 88 and 90 preferably lie on respective circles 96 and 98 having respective R 1 and R 2 radii 92 and 94. It is believed that the ratio of these radii, e.g., the relative placement radially outwards of the orifices 88 with respect to the orifices 90, is such that this ratio will have some effect on proper operation of the spray gun apparatus 10. In the embodiment of the present invention depicted herein, this ratio is about 3:5, however, it is believed that for proper operation of the gun this ratio of the radii is not critical. Still further, it will further be recalled that it is preferred that the tip 120 lie flush along the plane defined by the distal face 80 of the plate 76.
  • the first orifices 88 will preferably be formed about and point in the general direction of their respective axes 39A which are parallel to central longitudinal axis 39.
  • the aforementioned axes 101 of the second orifices 90 will preferably also define the aforementioned alpha angle 100 with the axes 39A, the intersection of axes 101 and 39A being hereinafter referred to as "X".
  • this alpha angle increases, corresponding to the second orifices 90 pointing in a direction more normal to axes 39, this point "X” will move in the proximal direction along axis 39A, and conversely as the angle alpha is decreased, this intersection point "X” moves distally outward on the axis 39A.
  • the configuration of the flame tunnel may vary as desired depending upon the particular operating conditions and feedstock material and the like by adjusting the various flow rates and angle alpha.
  • first and second orifices 88 and 90 define circles oriented such that a first and a second orifice will lie in coalignment along a radius extending radially outwards from the longitudinal axis 39.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Nozzles (AREA)

Abstract

Pistolet de projection à la flamme (10) de poudre en atmosphère ouverte et procédé d'application par projection. Plusieurs passages (44), (64), (66), s'étendant à travers le corps (32) du pistolet envoient un thermoplastique pulvérulent, de l'air de combustion et un combustible tel que du propane dans une chambre de mélange et de combustion (84) ouverte définie par une enveloppe (34) fixée autour du corps. Le mélange qui en résulte s'allume, faisant fondre le plastique, qui est ensuite expulsé de la chambre par une source d'air de propulsion (28), de façon à former un revêtement plastique autour d'un objet désiré.
PCT/US1985/001974 1984-09-11 1985-10-11 Procede et appareil d'enduction par projection WO1987002278A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US06/649,836 US4632309A (en) 1984-09-11 1984-09-11 Method and apparatus for spray coating
EP19850905283 EP0241457A1 (fr) 1985-10-11 1985-10-11 Procede et appareil d'enduction par projection
PCT/US1985/001974 WO1987002278A1 (fr) 1985-10-11 1985-10-11 Procede et appareil d'enduction par projection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1985/001974 WO1987002278A1 (fr) 1985-10-11 1985-10-11 Procede et appareil d'enduction par projection

Publications (1)

Publication Number Publication Date
WO1987002278A1 true WO1987002278A1 (fr) 1987-04-23

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Application Number Title Priority Date Filing Date
PCT/US1985/001974 WO1987002278A1 (fr) 1984-09-11 1985-10-11 Procede et appareil d'enduction par projection

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WO (1) WO1987002278A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0420873A1 (fr) * 1988-05-26 1991-04-10 American Combustion Inc Procede et appareil de traitement de particules solides a la flamme.
EP0513497A1 (fr) * 1991-05-08 1992-11-19 Plasma-Technik Ag Appareil de pulvérisation thermique à haute vitesse
CN108160359A (zh) * 2016-12-08 2018-06-15 斯普瑞喷雾系统(上海)有限公司 可实现多种喷雾功能的喷嘴装置

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US2450418A (en) * 1943-07-13 1948-10-05 Delphis C Breault Oil burner
US2794677A (en) * 1952-03-29 1957-06-04 Collardin Method of and apparatus for spraying
US3131091A (en) * 1960-03-08 1964-04-28 Harry S Jones Spray gun having means to control heat concentration in metal substrate
US3171599A (en) * 1963-03-05 1965-03-02 Metco Inc Powder flame spray gun nozzle
US3198434A (en) * 1961-02-01 1965-08-03 Dearborn Chemicals Co Apparatus for applying heatreactive coatings
US3438579A (en) * 1967-06-28 1969-04-15 Powder Weld Intern Corp Apparatus for flame spraying powdered materials
US4192460A (en) * 1977-11-15 1980-03-11 Nippon Steel Corporation Refractory powder flame projecting apparatus
US4368846A (en) * 1979-12-22 1983-01-18 Heraeus Quarzschmelze Gmbh Melting burner made of vitreous silica for the production of massive vitreous silica
US4520756A (en) * 1983-07-20 1985-06-04 Japanese National Railways Build-up spraying apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450418A (en) * 1943-07-13 1948-10-05 Delphis C Breault Oil burner
US2794677A (en) * 1952-03-29 1957-06-04 Collardin Method of and apparatus for spraying
US3131091A (en) * 1960-03-08 1964-04-28 Harry S Jones Spray gun having means to control heat concentration in metal substrate
US3198434A (en) * 1961-02-01 1965-08-03 Dearborn Chemicals Co Apparatus for applying heatreactive coatings
US3171599A (en) * 1963-03-05 1965-03-02 Metco Inc Powder flame spray gun nozzle
US3438579A (en) * 1967-06-28 1969-04-15 Powder Weld Intern Corp Apparatus for flame spraying powdered materials
US4192460A (en) * 1977-11-15 1980-03-11 Nippon Steel Corporation Refractory powder flame projecting apparatus
US4368846A (en) * 1979-12-22 1983-01-18 Heraeus Quarzschmelze Gmbh Melting burner made of vitreous silica for the production of massive vitreous silica
US4520756A (en) * 1983-07-20 1985-06-04 Japanese National Railways Build-up spraying apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0420873A1 (fr) * 1988-05-26 1991-04-10 American Combustion Inc Procede et appareil de traitement de particules solides a la flamme.
EP0420873A4 (en) * 1988-05-26 1992-03-11 American Combustion, Inc. Method and apparatus for flame treatment of solid particles
EP0513497A1 (fr) * 1991-05-08 1992-11-19 Plasma-Technik Ag Appareil de pulvérisation thermique à haute vitesse
CN108160359A (zh) * 2016-12-08 2018-06-15 斯普瑞喷雾系统(上海)有限公司 可实现多种喷雾功能的喷嘴装置
CN108160359B (zh) * 2016-12-08 2024-03-08 斯普瑞喷雾系统(上海)有限公司 可实现多种喷雾功能的喷嘴装置

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