US1843842A - Method and device for producing metallic coatings and particularly lead coatings - Google Patents

Method and device for producing metallic coatings and particularly lead coatings Download PDF

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Publication number
US1843842A
US1843842A US330326A US33032629A US1843842A US 1843842 A US1843842 A US 1843842A US 330326 A US330326 A US 330326A US 33032629 A US33032629 A US 33032629A US 1843842 A US1843842 A US 1843842A
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United States
Prior art keywords
coatings
gas
disks
coating
core
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Expired - Lifetime
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US330326A
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English (en)
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Schoop Max Ulrich
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Individual
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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
    • B05B7/203—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 having originally the shape of a wire, rod or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/121—Projection

Definitions

  • the metal to beV deposited passes through a flame by which it is melted and is then projected on to the object to be coated either by the action of the blow ame or of a stream of compressed air.
  • the comparatively low temperature of the melting process is one of the characterizing features of the present invention. It may be mentioned that it took not less than 20 years to arrive at this cognition; my first experiments have been made in summer 1908 and from these experiments the present technics of atomizing metals has crystallized.
  • the novel process is particularly adapted for producing coatings of lead and tin; in the following for sake of simplicity the coating material will be called a lead wire.
  • the feed of the lead wire will be caused by means of the same current of compressed gas, for instance of carbonio acid, which has to effect the melting, atomizing and projecting of the material and by these measures the material does not get into contact with at- 'core, on which disks actin@ mospheric air until after the coating has been produced.
  • compressed gas for instance of carbonio acid
  • the heating of the compressed gas is effected in the most convenient manner by the aid of a heating device or glow head through which the compressed gas is conducted for being heated.
  • This device comprises an inner as baffle plates are provided in order to reluce the velocity of the flow of the gas, and an outer cover having a conical bore and fitting exactly on the suitably shaped circumferences of the disks.
  • Fig. l shows the apparatus diagrammatically and for the greatest part in a vertical section
  • Fig. 2 is a horizontal section of the apparatus
  • Fig. 4 shows the cover of the heating device
  • Fig. 5 shows two adjacent disks.
  • the apparatus is constructed in the manner of the metallizing pistols and the coating material, for instance, the lead wire l' is fed into the heating device at a regulable speed by means of the feed rollers 3, 4 driven by a turbine wheel 2 by the aid of two worm gearings 3 and 4
  • The'turbine is actuated by the compressed gas, which is supplied by the hose 5 and led to impinge onthe turbine wheel by the channel 6, so that the feed of the piece of coating material is effected by this gas.
  • the gas leaving the turbine wheel flows through the channel 7 to the heating device.
  • the heating device comprises an inner core 8, on which a plurality of disks 9 arranged one behind the other at a small distance from each other are seated, and an outer cover l0.
  • the inner core 8 and the disks 9 may also be made in one.
  • the cover 10 has a conical bore and is exactly fitted (by grinding) to the correspondingly shaped circumferences of the disks. The compressed gas must pass be.
  • the disks 9 act as baiiies in as much as notches 11 which permit the passage of the gas, are angularly displaced through 180O (Fig. 5) in adjacent disks.
  • a nozzle head 12 is screwed the bore of which together with the conical end 13 of the core 8 forms a nozzle.
  • the conical end 13 is provided with grooves 14 uniformly spaced around the cireumference of the cone and axially directed; the gas flows through said grooves and a uniform conical jet is formed thereby.
  • a protecting disk 15 is arranged at the rear of the nozzle head 12 at the rear of the nozzle head 12 at the rear of the nozzle head 12 .
  • the converted surface layer has as a rule a thickness of 1, 5 mm. and is so hard that the grinding of the parts for fitting them into the conical cover 10 can only be made With carborundum disks.
  • Heating devices treated in this manner have a life of 7 -8 months according to the experiments made up till now, after that period the outer cover 10, which is subjected to the narrow flames, has to be replaced.
  • the coni cal form permits an easy assembling and taking to pieces of the heating device.
  • the compressed gas Which is led through the heating device should show a temperature of i300-3500 C. at the discharge end, in
  • the protecting cover 15 prevents the llames and the combustion products to get into contact with the cone of the. atomized material and to unfavorably infiuence the latter. Therefore no oxidation can possibly occur and this accounts for the fact that according to the present invention sound, ductile and dense lead or tin coatings may be produced, which coatings are of considerable importance for the chemical and food-stuff industries.
  • the adhesive properties of the lead coatings which may be produced in any thick ness, on iron and steel are very goed and in contradistinction to the hitherto known methods the novel method permits to coat cast iron objects. Obviously' the object to be coated, previous to the coating process has to be carefully cleaned and heated. In certain cases a preliminary coating with tin is advisable as is usual in the typical homogeneous lead covering art. IVhether the preliminary coating has to be made or not depends on the nature of the object to be coated as Well as on the service to which the coating is subjected. If the coating is highly strained in service the resisting properties of the coating against chemical influences may be essentially improved by applying a coating of pulverized A1203. bauxite, porcelain or the like on the lead coating or by applying water glass, that is to say metal ⁇ lic coatings and non-metallic coatings are alternately deposited on the object.
  • rIhc consist in inserting a small tube into the channel serving for taking up the metallic Wire in order to feed the pulverized material throng this tube to the mouth of the nozzle. rIhe material is heated as it passes through the heating device; if necessary an increased melting heat may be produced by removing the cover 10 or by increasing the flames.
  • a device of the type described cornprising a device for heating a compressed gas and having an inner core, disks acting as battles provided on said core, an outer cover having a conical bore and fitting exill@ actly on the correspondingly shaped circumference of said disks, means producing a flame impinging on said outer cover, means to supply gas to the intermediate space between said inner core and said cover, a nozzle head at the outer end of said core fordischarging said gas for atomizing purposes, and means to feed the coating metalthrough said heating device in which it is melted by said heated gas, atomized and projected against the surface to be coated.
  • a device of the type described comprising a device for heating a compressed gas and having an inner core, disks acting as bales provided on said core, an outer cover having a conical bore and fitting exactly on the correspondingly shaped circumference of said disks, means producing a flame impinging on said outer cover, means to supply gas to the intermediate space between said inner core and said cover, a nozzle head at the outer end of said core for discharging said gas for atomizing purposes, and means to feed the coating metal through said heating device in which it is melted by said heated gas, atomized and projected against the surface to be coated, the outer end of said core being provided with axial grooves.
  • a device of the type described comprising a device for heating a compressed gas and having an inner core, disks acting as battles provided on said core, an outer cover having a conical bore and fitting exactly on the correspondingly shaped circumference of said disks, means producing a ame impinging on said outer cover, means to supply gas to the intermediate space between said inner core and said cover, a nozzle head at the outer end of said core for discharging said gas for atomizing purposes, means to feed the coating metal through said heating device in which it is melted by said heated gas, atomized and projected against the surface to be coated, and a protecting disk arranged on the rear end of said nozzle head.
  • a device of the type described comprising a device for heating a compressed gas and having an inner core, disks acting as baiiies provided on said core, an outer cover having a conical bore and fitting exactly on the correspondingly shaped circumference of said disks, means producing a. iame impinging on said outer cover, means to supply gas to the intermediate space between said inner core and said cover, a nozzle head at the outer end ofsaid core for discharging said gas for atomizing purposes, means to feed the coating metal through said heating device in which it is melted by said heated gas, atomized and projected against the surface to be coated.
  • a device of the type described comprising in combination, means to feed the coating metal operated by a turbine driven by a compressed indifferent gas, a device for heating a compressed gas and having an inner core,
  • disks acting as baflies provided on said core, an outer cover having a conical bore and fitting exactly on the correspondingly shaped circumference of said disks, means to supply a compressed indifferent gas to the intermediate space between said inner core and said cover, means to produce a flame impinging on said outer cover for heating said compressed gas on its passage through said intermediate space, a nozzle head at the outer end of said core for discharging said gas in jet form, and means for feeding the coating metal through said heating device in which it is melted by said heated gas, atomized and projected against the surface to be coated.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Nozzles (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
US330326A 1928-07-12 1929-01-04 Method and device for producing metallic coatings and particularly lead coatings Expired - Lifetime US1843842A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE315343T 1928-07-12

Publications (1)

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US1843842A true US1843842A (en) 1932-02-02

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ID=31894709

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Application Number Title Priority Date Filing Date
US330326A Expired - Lifetime US1843842A (en) 1928-07-12 1929-01-04 Method and device for producing metallic coatings and particularly lead coatings

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US (1) US1843842A (enrdf_load_stackoverflow)
FR (1) FR676941A (enrdf_load_stackoverflow)
GB (1) GB315343A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423490A (en) * 1944-05-20 1947-07-08 Erhardt Richard Metal spraying method
US2737415A (en) * 1953-01-29 1956-03-06 Elsa Wheeler Nicholson Paint spray gun
US2976392A (en) * 1953-09-04 1961-03-21 Wabnitz Richard Fluid distributing apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707691A (en) * 1952-08-08 1955-05-03 Norton Co Coating metals and other materials with oxide and articles made thereby
US2904449A (en) * 1955-07-26 1959-09-15 Armour Res Found Method and compositions for flame spraying
DE10049664C2 (de) * 2000-10-06 2003-05-28 Pac Tech Gmbh Abtragen und Reparatur von Kontakthöckern (De-bumping)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423490A (en) * 1944-05-20 1947-07-08 Erhardt Richard Metal spraying method
US2737415A (en) * 1953-01-29 1956-03-06 Elsa Wheeler Nicholson Paint spray gun
US2976392A (en) * 1953-09-04 1961-03-21 Wabnitz Richard Fluid distributing apparatus

Also Published As

Publication number Publication date
FR676941A (fr) 1930-02-28
GB315343A (enrdf_load_stackoverflow) 1930-01-31

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