US2676564A - Apparatus for coating articles - Google Patents

Apparatus for coating articles Download PDF

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Publication number
US2676564A
US2676564A US161818A US16181850A US2676564A US 2676564 A US2676564 A US 2676564A US 161818 A US161818 A US 161818A US 16181850 A US16181850 A US 16181850A US 2676564 A US2676564 A US 2676564A
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United States
Prior art keywords
paint
chamber
conductor
articles
mist
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Expired - Lifetime
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US161818A
Inventor
Alvin N Gray
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AT&T Corp
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Western Electric Co Inc
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Publication date
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Priority to US161818A priority Critical patent/US2676564A/en
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Publication of US2676564A publication Critical patent/US2676564A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0207Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe
    • B05B13/0214Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe the liquid or other fluent material being applied to the whole periphery of the cross section of the elongated body
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3421Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
    • B05B1/3431Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
    • B05B1/3436Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a plane perpendicular to the outlet axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0207Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe

Definitions

  • This invention relates to apparatus for coating articles, and more particularly to apparatus for painting covered conductors.
  • the latter method also uses more paint than is needed for coverage and does not coat the articles uniformly.
  • An object of the invention is to provide new and improved apparatus for coating articles.
  • a further object of the invention is to provide new and improved apparatus for painting covered conductors.
  • An apparatus illustrating certain features of the invention may include a chamber through which an article to be coated may be advanced, and means for creating mechanically a suspension of fine particles of liquid in the chamber, whereby the particles of liquid precipitate onto the article to coat it.
  • Fig. 1 is a fragmentary elevation of an apparatus forming one embodiment of the invention
  • Fig. 2 is an enlarged vertical section of a portion of the apparatus shown in Fig. 1;
  • Fig. 3 is an enlarged, fragmentary, horizontal section taken along line 3-4 of Fig. 2, and
  • Fig. 4 is an enlarged, fragmentary, vertical section taken along line 4-4 of Fig. 3.
  • a covered conductor it Which is to be coated with paint 28 is advanced from a supply reel it around a guide sheave l i, then upwardly through a closefitting entrance seal :5 into a painting chamber [5.
  • the conductor passes through the chamber I6 and leaves it through an exit opening 18.
  • the conductor 40 is advanced continuously from the chamber it through a drier 2t and around a guide sheave 2! by a capstan 22, and is taken up on a takeup reel 24.
  • a pump 26 driven by an electric motor 21 pumps paint 28 held in a reservoir 33 connected to a catch basin 29 cf the chamber [6 to atomizing nozzles 3il50 positioned in the chamber It
  • the paint is supplied to the chamber 1 6 through a supply pipe ill as needed.
  • the paint 28 is forced through the nozzles 303i1 under high pressure, and the nozzles 3il-3l! atomize the paint to a fine mist directed toward the portion of the conductor in the chamber It.
  • the mist is directed toward annular baflies 32-32 positioned between the nozzles til-36 and the conductor [0.
  • the baflies 32-32 prevent oversized particles of the paint from traveling toward the conductor Hi, but permit fine particles of the paint 28 to travel therepast and remain in suspension in the chamber 15.
  • the fine particles contact the covered conductor It completely therearound, and deposit thereon in a thin layer which has a uniform thickness over the entire exterior surface of the covered conductor so that excess paint is not required to coat the covered conductor completely.
  • Each of the nozzles 3ll3t includes a tubular housing 48 and an insert 4! having longitudinal passages 42A2, a bore i3 and transverse turbulating passages 45-65 tangential to the bore 43.
  • a cap 46 holds a disc 4? against the insert, and the disc has a small orifice 48 extending therethrough. The nozzles create a very fine mist leaving the orifices illustrated by the orifice 48.
  • the exit opening I8 is sufficiently large to prevent contact thereof with the coated conductor III as the conductor passes therethrough, but is sufficiently small to permit only negligible quantities of the paint mist to drift therethrough out of the chamber. Furthermore, since the opening I8 is located at the top of the chamber it, gravity aids in preventing escape of the particles from the chamber. The conductor ill is not contacted mechanically until it has left the driver 2%, and is engaged by the guide sheave 2! at which time the paint has been dried on the conductor. The oversized particles of paint caught by the baffles 32-32 drop back into the catch basin 29 in the chamber I6 and return to the reservoir 33.
  • the fine mist of paint produced by the atomizing nozzles 3il3fl and the baboards 32-32 fills the entire upper portion of the chamber 16 so that all portions of the covered conductor It are contacted by the mist and covered therewith.
  • the coating applied to the covered conductor is very 3 thin and evenly distributed thereon. Hence, no excess paint is required for coating the conductor with the mist.
  • large quantities of the paint are not wasted as in painting apparatus utilizin air sprays, because in creating the mist mechanically by pressure on the liquid forced through the nozzles or mechanical agitation, as distinguished from air sprays, or the like, no pressures tending to force the mist out of the apparatus are created.
  • An apparatus for painting a conductor which comprises a chamber having a bottom provided with a raised central portion having an entrance opening therein, said chamber also being pro vided with a top having an exit opening aligned with the entrance opening therein, a seal mounted in the entrance opening permitting a conductor to be advanced therethrough, a group of annular, wedge-shaped battles of a predetermined external diameter, a plurality of rods secured to the top and bottom of the chamber, a plurality of spacers mounted on the rods and mounting the baffles centrally in the chamber in positions extending in a series from the entrance opening to the exit opening and spaced from one another, a second group of annular, wedge-shaped baflies of an internal diameter greater than the external diameter of the first-mentioned bafiles, a plurality of rods secured to the top and the bottom of the chamber in positions outside the first-mentioned bafiles, a plurality of spacers mounted on the last-mentioned rods and mounting the baffle of the second group in

Landscapes

  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Description

April 27, 1954 A APPARATUS FOR COATING ARTICLES Filed May 13, 1950 IN l/E N TOR A N G A) A7' TORNEY Patented Apr. 27, 1954 APPARATUS FOR C OATING ARTICLES Alvin N. Gray, Edgewood, Md., assignor to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application May 13, 1950, Serial No. 161,818
1 Claim. 1
This invention relates to apparatus for coating articles, and more particularly to apparatus for painting covered conductors.
In applying coatings to articles, for example, in applying paint to insulated conductors, it is essential to cover the portions of the articles to be painted completely with paint but it is undesirable to use more paint than is needed to just cover the articles. Sometimes articles are painted with brushes, but this method of painting require large quantities of paint per unit area painted and does not coat articles uniformly. Air sprays also have been used. to paint articles, but in this method of painting, much of the spray misses the article to be painted, thereby wasting paint. A further method of painting consisted of immersing an article in a bath of paint, withdrawing the article and wiping as much of excess paint applied to the article as possible.
The latter method also uses more paint than is needed for coverage and does not coat the articles uniformly.
An object of the invention is to provide new and improved apparatus for coating articles.
A further object of the invention is to provide new and improved apparatus for painting covered conductors.
An apparatus illustrating certain features of the invention may include a chamber through which an article to be coated may be advanced, and means for creating mechanically a suspension of fine particles of liquid in the chamber, whereby the particles of liquid precipitate onto the article to coat it.
A complete understanding of the invention may be obtained from the following detailed description of an apparatus formin a specific embodiment thereof, when read in conjunction with the appended drawing, in which:
Fig. 1 is a fragmentary elevation of an apparatus forming one embodiment of the invention;
Fig. 2 is an enlarged vertical section of a portion of the apparatus shown in Fig. 1;
Fig. 3 is an enlarged, fragmentary, horizontal section taken along line 3-4 of Fig. 2, and
Fig. 4 is an enlarged, fragmentary, vertical section taken along line 4-4 of Fig. 3.
Referring now in detail to the drawing, a covered conductor it Which is to be coated with paint 28 is advanced from a supply reel it around a guide sheave l i, then upwardly through a closefitting entrance seal :5 into a painting chamber [5. The conductor passes through the chamber I6 and leaves it through an exit opening 18. The conductor 40 is advanced continuously from the chamber it through a drier 2t and around a guide sheave 2! by a capstan 22, and is taken up on a takeup reel 24.
A pump 26 driven by an electric motor 21 pumps paint 28 held in a reservoir 33 connected to a catch basin 29 cf the chamber [6 to atomizing nozzles 3il50 positioned in the chamber It The paint is supplied to the chamber 1 6 through a supply pipe ill as needed. The paint 28 is forced through the nozzles 303i1 under high pressure, and the nozzles 3il-3l! atomize the paint to a fine mist directed toward the portion of the conductor in the chamber It. The mist is directed toward annular baflies 32-32 positioned between the nozzles til-36 and the conductor [0.
The baflies 32-32 prevent oversized particles of the paint from traveling toward the conductor Hi, but permit fine particles of the paint 28 to travel therepast and remain in suspension in the chamber 15. The fine particles contact the covered conductor It completely therearound, and deposit thereon in a thin layer which has a uniform thickness over the entire exterior surface of the covered conductor so that excess paint is not required to coat the covered conductor completely.
Each of the nozzles 3ll3t includes a tubular housing 48 and an insert 4! having longitudinal passages 42A2, a bore i3 and transverse turbulating passages 45-65 tangential to the bore 43. A cap 46 holds a disc 4? against the insert, and the disc has a small orifice 48 extending therethrough. The nozzles create a very fine mist leaving the orifices illustrated by the orifice 48.
The exit opening I8 is sufficiently large to prevent contact thereof with the coated conductor III as the conductor passes therethrough, but is sufficiently small to permit only negligible quantities of the paint mist to drift therethrough out of the chamber. Furthermore, since the opening I8 is located at the top of the chamber it, gravity aids in preventing escape of the particles from the chamber. The conductor ill is not contacted mechanically until it has left the driver 2%, and is engaged by the guide sheave 2! at which time the paint has been dried on the conductor. The oversized particles of paint caught by the baffles 32-32 drop back into the catch basin 29 in the chamber I6 and return to the reservoir 33.
The fine mist of paint produced by the atomizing nozzles 3il3fl and the baiiles 32-32 fills the entire upper portion of the chamber 16 so that all portions of the covered conductor It are contacted by the mist and covered therewith. In coating the covered conductor with a mist, the coating applied to the covered conductor is very 3 thin and evenly distributed thereon. Hence, no excess paint is required for coating the conductor with the mist. Furthermore, large quantities of the paint are not wasted as in painting apparatus utilizin air sprays, because in creating the mist mechanically by pressure on the liquid forced through the nozzles or mechanical agitation, as distinguished from air sprays, or the like, no pressures tending to force the mist out of the apparatus are created.
What is claimed is:
An apparatus for painting a conductor, which comprises a chamber having a bottom provided with a raised central portion having an entrance opening therein, said chamber also being pro vided with a top having an exit opening aligned with the entrance opening therein, a seal mounted in the entrance opening permitting a conductor to be advanced therethrough, a group of annular, wedge-shaped battles of a predetermined external diameter, a plurality of rods secured to the top and bottom of the chamber, a plurality of spacers mounted on the rods and mounting the baffles centrally in the chamber in positions extending in a series from the entrance opening to the exit opening and spaced from one another, a second group of annular, wedge-shaped baflies of an internal diameter greater than the external diameter of the first-mentioned bafiles, a plurality of rods secured to the top and the bottom of the chamber in positions outside the first-mentioned bafiles, a plurality of spacers mounted on the last-mentioned rods and mounting the baffle of the second group in the chamber in positions covering the spaces between the baflles of the first group, and means positioned in th chamber outside the baffles for projecting a fog of paint toward the baffies.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,160,980 Geer Nov. 16', 1915 1,547,513 Morden July 28, 19 2,069,845 Paasche Feb. 9, 1937 2,319,353 Schwartz et a1 May 18, 1943 2,437,606 Kaufman Mar. 9, 1948 2,447,664 Pegg Aug. 24, 1948
US161818A 1950-05-13 1950-05-13 Apparatus for coating articles Expired - Lifetime US2676564A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865324A (en) * 1954-06-23 1958-12-23 Smith Corp A O Apparatus for applying coating material to articles
US2883306A (en) * 1955-04-15 1959-04-21 Westinghouse Electric Corp Electrode coating process and apparatus
US2913354A (en) * 1954-06-08 1959-11-17 Northwestern Steel & Wire Co Continuous method for conditioning wire
US4145463A (en) * 1972-08-21 1979-03-20 Albright & Wilson Limited Flameproofing of textiles

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1160980A (en) * 1910-04-26 1915-11-16 Langdon Geer Process of and apparatus for proofing.
US1547513A (en) * 1922-07-27 1925-07-28 Crown Willamette Paper Company Method and means for impregnating alpha sheet of material with liquid
US2069845A (en) * 1933-02-02 1937-02-09 Jens A Paasche Coating machine
US2319353A (en) * 1937-07-02 1943-05-18 Ecla Patents Corp Coating of surfaces with liquids by spraying
US2437606A (en) * 1944-11-27 1948-03-09 Jones & Laughlin Steel Corp Method and apparatus for oiling sheet metal
US2447664A (en) * 1945-02-01 1948-08-24 Westinghouse Elec Elevator Co Electrostatic coating apparatus and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1160980A (en) * 1910-04-26 1915-11-16 Langdon Geer Process of and apparatus for proofing.
US1547513A (en) * 1922-07-27 1925-07-28 Crown Willamette Paper Company Method and means for impregnating alpha sheet of material with liquid
US2069845A (en) * 1933-02-02 1937-02-09 Jens A Paasche Coating machine
US2319353A (en) * 1937-07-02 1943-05-18 Ecla Patents Corp Coating of surfaces with liquids by spraying
US2437606A (en) * 1944-11-27 1948-03-09 Jones & Laughlin Steel Corp Method and apparatus for oiling sheet metal
US2447664A (en) * 1945-02-01 1948-08-24 Westinghouse Elec Elevator Co Electrostatic coating apparatus and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2913354A (en) * 1954-06-08 1959-11-17 Northwestern Steel & Wire Co Continuous method for conditioning wire
US2865324A (en) * 1954-06-23 1958-12-23 Smith Corp A O Apparatus for applying coating material to articles
US2883306A (en) * 1955-04-15 1959-04-21 Westinghouse Electric Corp Electrode coating process and apparatus
US4145463A (en) * 1972-08-21 1979-03-20 Albright & Wilson Limited Flameproofing of textiles

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