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US1721092A - Metal-spraying device - Google Patents

Metal-spraying device Download PDF

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Publication number
US1721092A
US1721092A US28925A US2892525A US1721092A US 1721092 A US1721092 A US 1721092A US 28925 A US28925 A US 28925A US 2892525 A US2892525 A US 2892525A US 1721092 A US1721092 A US 1721092A
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United States
Prior art keywords
metal
casing
furnace
blast
gas
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Expired - Lifetime
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US28925A
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Jr Charles Marshall Saeger
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Individual
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    • 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
    • B05B7/18—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 material having originally the shape of a wire, rod or the like

Definitions

  • This invention relates in general to the metal spraying devices and more particularly to a metal spray device in which. the metal to be sprayed 1s meltedby electric induction.
  • An object of my invention is to provide a means for feeding the metal to be fused.
  • Another object of my invention is to provide novel and improved cooling means for my device.
  • Fig. 1 is a longitudinal section of my melting furnace and blast nozzle.
  • Fig. 2 is a detail view in section illustrating l a modification of the inner tube.
  • Fi 3 is a similar view of still another modificatlon of the tube.
  • Fig. 4 illustrates two of my devices adjustably mounted on a single frame.
  • Fig. 5 is a view of the metal feeding devlce used in connection herewith.
  • Fig. 6 is a detail view of the driving mechanism for the knurled roll.
  • Fig. 7 is a detail sectional view of the i knurled roll and adjacent parts and Fig. 8 is 'a side elevation showing a furnace and a blast nozzle constructedv separately.
  • Fig. 9 is a side elevation, partly diagrammatical, showing my assembled device.
  • T e metal spray device includes a casing 1 in which the operating parts are housed, the vingha pistol grip pr other suitable handle 2 for t e manipulation of the device.
  • the furnace or melting apparatus is en- 1925. Serial N0. 28,925.
  • a hollow tube 4 of electro-insulating material 1s mounted centrally of the casing 3 and spaced therefrom byV glands 5 and 6 which are erforated at 7 to permit of the passage of t e blast gases as will hereinafter be disclosed.
  • a coil 8 of copper or other electro-conductive material mounted centrally of the casing 3 and spaced therefrom byV glands 5 and 6 which are erforated at 7 to permit of the passage of t e blast gases as will hereinafter be disclosed.
  • Mounted on the tube 4 is a coil 8 of copper or other electro-conductive material wound spirally with an increasingly great number of turns to each unit of length as it approaches the nozzle 9 of the device.
  • the material of the coil 8 is bandular in structure the bands being wound edgewise upon the tube 4.
  • the forward end of the tube 4 is coniform in shape to conform to the nozzle 9.
  • the nozzle 9 is djustably screw threadedly/- ymay be opened at will to permit the passage of blast gas along the passage oftube 4.
  • a tube 23 is provided with valve 24 to control the passage of gas along the annular space between the tube 4 and the casing 3.
  • the high frequency current is secured from a standard light weight high frequency apparatus 25 and is conducted to the furnace by leads 15 and 16.
  • the gas or air to 4cool the furnace and to furnish the blast for spraying is obtained from any suitable source 26 and is fed. to the furnace through flexible tubes 27 and 28.
  • the wire feeding apparatus is disclosed diagrammatically at 29 though itis preferably inclosed in the casing to the r'ear of the furnace vas later disclosed.
  • a gear 34 xedly upper end of the shaft 30 is formed to pronozzle 46 on lead 47.
  • a second knurled roll 38 is mounted on a shaft 39 which is held in a yoke 40 pivotally secured to a shaft 41.
  • 'lhe'roll 38 1s pressed toward the roll 37 by sppngpressed plungers 40 held 1n sleeves 4L adjustably screW-threadedly secured 1n the cover 42 of the casing l.
  • the casing cover 42 is pivoted to the body of the casing at 43 and is held in closed position by a spring latch 44.
  • the driving shaft has mounted thereon a turbine wheel 45 which is adapted to he rotated by high pressure gas issuing from a 'lhe gas fiow may be controlled by a valve 48.
  • the'wire When the Wire to be melted is of heavy stock or when other Condit-ions render the use of an electric drive preferable to a turbine drive the'wire may be fed by an electric.r motor 49 driving the shaft through a flexible shaft 50.
  • Figure 8 shows a modification of my device in Which the induction furnace for melting the 'metal is formed separately from the device for atomizing the molten metal.
  • the operation of my device will be understood to be as follows: .
  • the gas blast is first put into operation by the .opening of the valve leading to the passages and the nozzle is adjusted to give the desired cone of dispersion.
  • the high frequency current is then put into operation and thewire feeding apparatus started.
  • the wlre enters the rear of the furnace induction or eddy currents are set up in it causing it to rise in temperature.
  • the Wire progresses toward the nozzle 1t is subjected to the continued action of the coils which, as the wire approaches the nozzle,
  • the Wire to be fused may be fed by either of the drive sources, the rotation of the driving shaft resulting in the rotation of the knurled feed rolls to feed the Wire.
  • the adjustably held spring pressed plungers permit adjustment of the rolls to accommodate various sizes of stock, the spring holding the upper roll tightly in engagement with the stock.
  • the gas blast may be used through either the annular passageway or the bore of the tube4, or both, depending upon the nature of thc material and characteristics vof the coating desired.
  • '.lhe gas to be fed through the bore of the tube 4 may be heated if desired and it may be either an inert gas or an oxidizing one depending upon the nature of the coating desired.
  • a metal spraying device a casing, a high frequency induction furnace within said casing, means for continuously feeding the metal to be sprayed into said furnace, and means for spraying the molten metal.
  • a metal spraying device a casing, a blast nozzle adjustably secured to said casing, a high frequency induction furnace Within said casing and spaced therefrom to provide cooling passages, said high frequency furnace comprising an insulating core Wound with an increasing number of turns of conductive material per linear unit from rear to front, means for continuously feeding the metal to be sprayed into said core, and means for causing a blast of gas to pass through said passages for the purposes described. 5.
  • a metal spraying device a casing, a blast nozzle adjustably secured to said casing, a high frequency induction furnace within said casing and spaced therefrom to rovide cooling passages, said high frequency urnace comprising an insulating core Wound with an increasing number of turns of conductive material per linear unit from rear to front,
  • a casing en electricinduction furnace within said casing, means for continuously feeding the metal to be sprayed into said furnace, and means for spraying molten motel.

Landscapes

  • Coating By Spraying Or Casting (AREA)

Description

Julyls, 1929.
C. M. SAEGER METAL SPRAYING DEVICE 3 Sheets-Sheet 1 Filed May 8, 1925 l llllllll l.
alito: mag
July 16, 1929. c. M. sAr-:GER, JR
mm1. sPnAYING DEvIE I 3 Sheet-ssheet 2 Filed May 8, 1925 July 16, 1929. c. M. sAEGER, JR
METAL SPRAYING DEVICE 5 Sheets-Sheet -3 Filed May 8, 1925 ramal July 16.1929.
UNITED 'STATES CHARLES MARSHALL SAEG'ER, JR., 0F WASHD-GTON', DISTRICT OF COLUMBIA.
METAL-SPRAYING DEVICE.
Application tiled Y May 8,
This invention relates in general to the metal spraying devices and more particularly to a metal spray device in which. the metal to be sprayed 1s meltedby electric induction.
It is the prime object of my' invention to provide a metal spraydevice 1n ywhich 'the metal to be sprayed is melted by induction, using high frequency. current, this method giving an almost unllmited degree of temperature control for the pu ose of meltlng a great variety of metals while the temperature of the outside of the device is not raisedy materially. u I
It is a further object of my 1nvent1on to provide a metal spray device of llght structure which can be conveniently operated at a distance from the source of electrical energy.
An object of my invention is to provide a means for feeding the metal to be fused.
Another object of my invention is to provide novel and improved cooling means for my device.
A further obiect of my invention 1s to provideV means for controlling the temperature,
velocity and application of the spraying blast of air or as.
Other o jects of my invention vill appear in the accompanying specification and claims and will be disclosed in the accompanying drawings in which Fig. 1 isa longitudinal section of my melting furnace and blast nozzle.
Fig. 2 is a detail view in section illustrating l a modification of the inner tube.
, Fi 3 is a similar view of still another modificatlon of the tube.
Fig. 4 illustrates two of my devices adjustably mounted on a single frame.
Fig. 5 is a view of the metal feeding devlce used in connection herewith.
Fig. 6 is a detail view of the driving mechanism for the knurled roll.
Fig. 7 is a detail sectional view of the i knurled roll and adjacent parts and Fig. 8 is 'a side elevation showing a furnace and a blast nozzle constructedv separately.
Fig. 9 is a side elevation, partly diagrammatical, showing my assembled device.
Referring now with greater particularity to the drawings it will be seen that my device is com rised as follows:
' T e metal spray device includes a casing 1 in which the operating parts are housed, the vingha pistol grip pr other suitable handle 2 for t e manipulation of the device.
The furnace or melting apparatus is en- 1925. Serial N0. 28,925.
closed in the casing 1 and consists of an outer' casmg 3 of heat and electric insulating material. A hollow tube 4 of electro-insulating material 1s mounted centrally of the casing 3 and spaced therefrom byV glands 5 and 6 which are erforated at 7 to permit of the passage of t e blast gases as will hereinafter be disclosed. Mounted on the tube 4 is a coil 8 of copper or other electro-conductive material wound spirally with an increasingly great number of turns to each unit of length as it approaches the nozzle 9 of the device. The material of the coil 8 is bandular in structure the bands being wound edgewise upon the tube 4. The forward end of the tube 4 is coniform in shape to conform to the nozzle 9.
The nozzle 9 is djustably screw threadedly/- ymay be opened at will to permit the passage of blast gas along the passage oftube 4. A tube 23 is provided with valve 24 to control the passage of gas along the annular space between the tube 4 and the casing 3.
The high frequency current is secured from a standard light weight high frequency apparatus 25 and is conducted to the furnace by leads 15 and 16.
The gas or air to 4cool the furnace and to furnish the blast for spraying is obtained from any suitable source 26 and is fed. to the furnace through flexible tubes 27 and 28. In Figures 5 and 6 the wire feeding apparatus is disclosed diagrammatically at 29 though itis preferably inclosed in the casing to the r'ear of the furnace vas later disclosed.
Having vreference now especially to Figures 5, 6 and `7, my wire feeding device will be disclosed. g. u
In this structure the drive shaft 30 mounted in suitable bearings 31 passes up through the pistol grip, 2 into the casing 1. The
vide a worm for driving a worm ear 32 for rotating through the medium ,o reducing or planetary gears 33, a gear 34 xedly upper end of the shaft 30 is formed to pronozzle 46 on lead 47.
said collar 35. A second knurled roll 38 is mounted on a shaft 39 which is held in a yoke 40 pivotally secured to a shaft 41. 'lhe'roll 38 1s pressed toward the roll 37 by sppngpressed plungers 40 held 1n sleeves 4L adjustably screW-threadedly secured 1n the cover 42 of the casing l. The casing cover 42 is pivoted to the body of the casing at 43 and is held in closed position by a spring latch 44.
The driving shaft has mounted thereon a turbine wheel 45 which is adapted to he rotated by high pressure gas issuing from a 'lhe gas fiow may be controlled by a valve 48.
When the Wire to be melted is of heavy stock or when other Condit-ions render the use of an electric drive preferable to a turbine drive the'wire may be fed by an electric.r motor 49 driving the shaft through a flexible shaft 50.
Figure 8 shows a modification of my device in Which the induction furnace for melting the 'metal is formed separately from the device for atomizing the molten metal. At 7 3 I have shown a furnace of the No'rthrup type 73 with a gas blast nozzle 7'5 positioned at an angle thereto and adjustable 111 angular relation thereto by means of a link 78, to control the degree of fincncss of the coatmg sprayed. h
The operation of my device will be understood to be as follows: .The gas blast is first put into operation by the .opening of the valve leading to the passages and the nozzle is adjusted to give the desired cone of dispersion. The high frequency current is then put into operation and thewire feeding apparatus started. As the wlre enters the rear of the furnace induction or eddy currents are set up in it causing it to rise in temperature. As the Wire progresses toward the nozzle 1t is subjected to the continued action of the coils which, as the wire approaches the nozzle,
are of an increasingly great number of turns,l
until the metal is melted. The blast of gases through the passageways 7 and the bore of the tube 4 force the fused metal out of the nozzle and deposit the same on the material to be coated.
The gases passing through the annular pas- Sagevvay between the coil and the casing 3 and through the bore of tube 4 tends to cool the. apparatus. The ease of control of the high frequency1 apparatus makes the control ofthe temperature of the furnace governable.
to the extent that metals of a wide range'of points can be sprayed by this apparatus. The Wire to be fused may be fed by either of the drive sources, the rotation of the driving shaft resulting in the rotation of the knurled feed rolls to feed the Wire. The adjustably held spring pressed plungers permit adjustment of the rolls to accommodate various sizes of stock, the spring holding the upper roll tightly in engagement with the stock.
The gas blast may be used through either the annular passageway or the bore of the tube4, or both, depending upon the nature of thc material and characteristics vof the coating desired. '.lhe gas to be fed through the bore of the tube 4 may be heated if desired and it may be either an inert gas or an oxidizing one depending upon the nature of the coating desired.
In the modification shown in Figure 2 I have provided a lining 60 of electro-conducted material Within and throughout the length of the core 4. In this type of furnace thel lining 6() will be heated to a high degree by induction and will melt the metal by radiation. In the structure shown in Figure 3 I have shown a lining 60 of conductive material extending for a portion of the length of said core and at the rearward portion thereof. This liningA serves to heat the met-al to a certain extent by radiation and also serves as a means for heating gas blasts which may be passed through the core of the tube 4.
I claim:
1. In a metal spraying device, a casing, a high frequency induction furnace within said casing, means for continuously feeding the metal to be sprayed into said furnace, and means for spraying the molten metal.
2. In a metal spraying device, a casing, a
high frequency induction furnace Within saidl casing and spaced therefromto provide passages, means for continuously feeding the metalto be sprayed into said furnace, and
-means for causing a blast of gas to pass be sprayed :into said core, and means for spraying said metal when molten. V
4. In a metal spraying device, a casing, a blast nozzle adjustably secured to said casing, a high frequency induction furnace Within said casing and spaced therefrom to provide cooling passages, said high frequency furnace comprising an insulating core Wound with an increasing number of turns of conductive material per linear unit from rear to front, means for continuously feeding the metal to be sprayed into said core, and means for causing a blast of gas to pass through said passages for the purposes described. 5. In a metal spraying device, a casing, a blast nozzle adjustably secured to said casing, a high frequency induction furnace within said casing and spaced therefrom to rovide cooling passages, said high frequency urnace comprising an insulating core Wound with an increasing number of turns of conductive material per linear unit from rear to front,
`means for continuously feeding the metal t0 meinen means for continuously feeding the metal to be sprayed into said core, and means for causing a blast of gas to pass through said essages and said core for the ur es descri ed.
6. In a' meta-l spraying ev1ce, a casing, en electricinduction furnace within said casing, means for continuously feeding the metal to be sprayed into said furnace, and means for spraying molten motel. v
7. En e motel spying device, n casing, n. high frequency induction furnace within seid casing, moons for continuously eeg the motel to be sprayed into said fum, means vfor sprayin the molten met, and L E for cooling sei fum,
In testimony whereof In
US28925A 1925-05-08 1925-05-08 Metal-spraying device Expired - Lifetime US1721092A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633386A (en) * 1950-02-18 1953-03-31 Frank D Mahoney Combination nozzle, check valve, and strainer
US2648567A (en) * 1948-06-08 1953-08-11 Joseph B Brennan Metallizing gun
US2657098A (en) * 1950-11-09 1953-10-27 Klingerit Inc Spray nozzle
US2673121A (en) * 1948-08-18 1954-03-23 Joseph B Brennan Apparatus for spraying thermoplastic material
US4181256A (en) * 1977-05-20 1980-01-01 Ryoichi Kasagi Metal melt-spraying method and equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648567A (en) * 1948-06-08 1953-08-11 Joseph B Brennan Metallizing gun
US2673121A (en) * 1948-08-18 1954-03-23 Joseph B Brennan Apparatus for spraying thermoplastic material
US2633386A (en) * 1950-02-18 1953-03-31 Frank D Mahoney Combination nozzle, check valve, and strainer
US2657098A (en) * 1950-11-09 1953-10-27 Klingerit Inc Spray nozzle
US4181256A (en) * 1977-05-20 1980-01-01 Ryoichi Kasagi Metal melt-spraying method and equipment

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