US1997761A - Method of internally coating hollow articles - Google Patents
Method of internally coating hollow articles Download PDFInfo
- Publication number
- US1997761A US1997761A US510726A US51072631A US1997761A US 1997761 A US1997761 A US 1997761A US 510726 A US510726 A US 510726A US 51072631 A US51072631 A US 51072631A US 1997761 A US1997761 A US 1997761A
- Authority
- US
- United States
- Prior art keywords
- pipe
- article
- coating
- hollow articles
- internally coating
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 238000000576 coating method Methods 0.000 title description 12
- 239000011248 coating agent Substances 0.000 title description 9
- 238000000034 method Methods 0.000 title description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 210000003141 lower extremity Anatomy 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 241000282337 Nasua nasua Species 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- -1 enamel Substances 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
Images
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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
-
- 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
- Y10S118/00—Coating apparatus
- Y10S118/10—Pipe and tube inside
Definitions
- the main objects of the invention areto provide apparatus of this kind which is particularly adapted for applying coatings of any type that require the application of heat; to provide improved means for heating the article, both during the application of coating material on its internal surfaces and after the coating material is applied thereon; to provide means of this kind.
- apparatus for. generating an alternating magnetic field around the article so as to inductively heat the latter; and to provide apparatus for turning the article while it is being inductively heated so as to form coatings of uniform thickness throughout the entirety of its internal surface.
- Furtherobjects of the invention are to provide an improved method by which successive adjacent sections of an article of limited area are repeatedly brought into contact with a liquid charge of coating material while the article is heated; to provide a method for internally coating articles which is particularly adapted to build up successive layers of rubber to the form of an integral coating of substantial thickness; and to provide a method of this kind during which each layer is partially dried or cured before the next succeedinglayer of thecoating material is applied;
- Fig. 1 is a central vertical section illustrating apparatus, suitable for conducting my improved internal coating method.
- Fig. 2 is a transverse vertical section taken on the line 2-4 of Fig. l.
- Fig. 3 is a right end elevation of the apparatus shown in .Fig. 1.
- Fig. 4 is a section similar to Fig. 2, but showing a substantially completely formed internal coati s.
- our improved internal coating apparatus includes a base or bed portion 1 having upright supports 2 near its respectively opposite ends on which are formed, spaced flanges 3.
- the peripheries of the rollers 4 of each support are spaced apart sufllciently to permit extensions on a tubular member or pipe 5 to be partially received between and rotatably supported by the rollers.
- an induction coil '1 which includes a body portion 8 of electrical and heat insulating material, such as asbestos, in which convolutions 9 of wire are embedded.
- the coil 1- is connected in a circuit having a source of alternating current of'substantially low voltage and moderate frequency.
- a circuit of 440 volts and cycles is employed, an alternating field cfsufiicient strength to heat thepipe 5' is developed in the central passage Hl through which the pipe extends.
- the metal of the pipe serves as a core, and is inductively heated.
- the respectively opposite ends of the pipe 5' are closed by cylindrical members or caps H in which are formed end recesses l0 for receiving the end portions of the pipe 5, and vent openings l2.
- the cylindrical members II are seated upon the rollers 4 and one member, shown on the left end of the pipe 5', is provided with a concentric friction drum l3 which contacts with a driving drum M by which the pipe is rotated. 1
- coatings comprising compositions of any type which require the application of heat in drying or solidifying, such as paint, enamel, rubber and thelike, may be rapid- 1y formed on the inner surface of a pipe or other hollow article.
- the pipe 5 is partially filled with an uncured rubber composition IS in liquid state which, due to its inertia, collects at the lower extremity of the pipe and tends to remain in the position shown in-Fig. 2 during rotation.
- an uncured rubber composition IS in liquid state which, due to its inertia, collects at the lower extremity of the pipe and tends to remain in the position shown in-Fig. 2 during rotation.
- successive areas of its internal surface are brought in contact with the charge oi liquid rubber composition and they are then moved out of the charge.
- the heat induced in the metal of the pipe 5 drives oi the solvent from the films of the rubber composition when the successive areas of the pipe are out of contact with the charge l5.
- successive layers of film-like thickness are built up on the inner surface of the pipe and they are partially solidified or-cured as they are applied so as to provide an' integral coating l8 of substantial thickness.
- Rotation of the pipe may be continued after all of the charge of liquefied rubber has been distributed upon'the internal surfaces of
Description
April- 16, 1935. E. 1.. BAILEY El AL METHOD OF INTERNALLY COATING HOLLOW ARTICLES Filed Jan. 23, 1931 A V mB m m m R NLT 0 w w A WML Patented Apr. l6, 1935 UNITED STATES PATENT, OFFICE METHOD OF INTERNALLY COATING HOLLOW ARTICLES Edgar L. Bailey, Birmingham, and, Willett J. McCortney, Royal Oak, Mich., assignors to Chrysler Corporatiom Detroit, Mich, a corporation of Delaware Application January 23, 1931, Serial No. 510,726 1 Claim. '(Cl. 219- 4'l) 6 of metal having a substantial magnetic permeability.
The main objects of the invention areto provide apparatus of this kind which is particularly adapted for applying coatings of any type that require the application of heat; to provide improved means for heating the article, both during the application of coating material on its internal surfaces and after the coating material is applied thereon; to provide means of this kind.
which includes apparatus for. generating an alternating magnetic field around the article so as to inductively heat the latter; and to provide apparatus for turning the article while it is being inductively heated so as to form coatings of uniform thickness throughout the entirety of its internal surface.
Furtherobjects of the invention are to provide an improved method by which successive adjacent sections of an article of limited area are repeatedly brought into contact with a liquid charge of coating material while the article is heated; to provide a method for internally coating articles which is particularly adapted to build up successive layers of rubber to the form of an integral coating of substantial thickness; and to provide a method of this kind during which each layer is partially dried or cured before the next succeedinglayer of thecoating material is applied;
. An illustrative embodiment of the invention is shown in the accompanying drawing, in which:
Fig. 1 is a central vertical section illustrating apparatus, suitable for conducting my improved internal coating method.
Fig. 2 is a transverse vertical section taken on the line 2-4 of Fig. l.
Fig. 3 is a right end elevation of the apparatus shown in .Fig. 1.
Fig. 4 is a section similar to Fig. 2, but showing a substantially completely formed internal coati s.
In the form shown, our improved internal coating apparatus includes a base or bed portion 1 having upright supports 2 near its respectively opposite ends on which are formed, spaced flanges 3. Rotatably mounted on the front and rear extremities o! the flanges 3-are rollers 4 which have pins 5 that are journaled in apertures formed in the flan es 3. The peripheries of the rollers 4 of each support are spaced apart sufllciently to permit extensions on a tubular member or pipe 5 to be partially received between and rotatably supported by the rollers.
Mounted between the supports 2, on seats 6 that are formed integral with the base I, is an induction coil '1 which includes a body portion 8 of electrical and heat insulating material, such as asbestos, in which convolutions 9 of wire are embedded. The coil 1- is connected in a circuit having a source of alternating current of'substantially low voltage and moderate frequency. When a circuit of 440 volts and cycles is employed, an alternating field cfsufiicient strength to heat thepipe 5' is developed in the central passage Hl through which the pipe extends. The metal of the pipe serves as a core, and is inductively heated.
The respectively opposite ends of the pipe 5' are closed by cylindrical members or caps H in which are formed end recesses l0 for receiving the end portions of the pipe 5, and vent openings l2. The cylindrical members II are seated upon the rollers 4 and one member, shown on the left end of the pipe 5', is provided with a concentric friction drum l3 which contacts with a driving drum M by which the pipe is rotated. 1
With the above apparatus, coatings comprising compositions of any type which require the application of heat in drying or solidifying, such as paint, enamel, rubber and thelike, may be rapid- 1y formed on the inner surface of a pipe or other hollow article.
In the form illustrated, the pipe 5 is partially filled with an uncured rubber composition IS in liquid state which, due to its inertia, collects at the lower extremity of the pipe and tends to remain in the position shown in-Fig. 2 during rotation. As the pipe is turned upon the rollers l, successive areas of its internal surface are brought in contact with the charge oi liquid rubber composition and they are then moved out of the charge. The heat induced in the metal of the pipe 5 drives oi the solvent from the films of the rubber composition when the successive areas of the pipe are out of contact with the charge l5. In this manner successive layers of film-like thickness are built up on the inner surface of the pipe and they are partially solidified or-cured as they are applied so as to provide an' integral coating l8 of substantial thickness. Rotation of the pipe may be continued after all of the charge of liquefied rubber has been distributed upon'the internal surfaces of the pipe and after the volatile constituent of the charge has been com-J.
pletely vaporized so as to continue the curing of the rubber to any desired degree.
With this method, a coating of substantially uniform thickness is rapidly formed on the internal surfaces of a hollow article. The film-like layers of rubber which make up the integral coating are partially cured and dried during their successive formation and as a result, the coating is uniformly cured throughout its thickness.
Although but one specific embodiment of this invention has herein been shown and described,
it will be understood that various changes in the size, shape and arrangement of parts may be consists in conditioning said article for holding a deposit of liquid in contacting relation with only a limited portion of the interior surface thereof, rotatably supporting said article within an induction coil with its axis of rotation disposed substantially horizontally, providing a deposit of liquefied uncured rubber composition having a volatile solvent in the lower extremity of said article, and energizing said coil for inductively heating said article and simultaneously rotating the-latter at a speed under that required to overcome the inertia tending to retain said deposit at the lower extremity of said article so as to alternately apply successive film-like layers of said coating composition on adjacent portions of the interior of said article and subject said layers to heat while removed from said deposit.
EDGAR L. BAILEY.
WILLETT J. McCORTNEY.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US510726A US1997761A (en) | 1931-01-23 | 1931-01-23 | Method of internally coating hollow articles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US510726A US1997761A (en) | 1931-01-23 | 1931-01-23 | Method of internally coating hollow articles |
Publications (1)
Publication Number | Publication Date |
---|---|
US1997761A true US1997761A (en) | 1935-04-16 |
Family
ID=24031926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US510726A Expired - Lifetime US1997761A (en) | 1931-01-23 | 1931-01-23 | Method of internally coating hollow articles |
Country Status (1)
Country | Link |
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US (1) | US1997761A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2441493A (en) * | 1947-06-10 | 1948-05-11 | Atlantic Refining Co | Desulfurization of hydrocarbons with boron phosphate-alumina catalyst |
US2470689A (en) * | 1943-02-16 | 1949-05-17 | Chase Brass & Copper Co | Process for tin-coating the interiors of copper tubes |
US2516058A (en) * | 1943-09-30 | 1950-07-18 | Bell Telephone Labor Inc | Apparatus for plating of metals |
US2794448A (en) * | 1949-04-09 | 1957-06-04 | Columbia Cable & Electric Corp | Art of spray coating of tubes |
US2848566A (en) * | 1954-02-01 | 1958-08-19 | Smith Corp A O | Induction heating apparatus for fusing vitreous enamel |
US2908384A (en) * | 1954-03-03 | 1959-10-13 | Babcock & Wilcox Co | Method of applying a particulate lubricant to a tubular extrusion billet |
US3207618A (en) * | 1961-08-03 | 1965-09-21 | Internat Protected Metals Inc | Method and apparatus for applying protective coatings |
US3338795A (en) * | 1964-11-13 | 1967-08-29 | Richard H Mcbee | Culture tube rolling machine |
US3816938A (en) * | 1972-04-06 | 1974-06-18 | E Nikolaevich | Method and device for drying enamel slip on inner surfaces of pipes |
US4089998A (en) * | 1976-07-13 | 1978-05-16 | Gibson Jack Edward | Method of powder coating the interior of tubular goods |
FR2523876A1 (en) * | 1982-03-29 | 1983-09-30 | Reznick David | APPARATUS AND METHOD FOR APPLYING A COATING TO A SUBSTRATE WITH VACUUM CURING AND SOLVENT RECOVERY |
USRE32921E (en) * | 1976-07-13 | 1989-05-09 | GCB, Inc. | Method of powder coating the inside of pipes with a continuous film of plastic material |
-
1931
- 1931-01-23 US US510726A patent/US1997761A/en not_active Expired - Lifetime
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2470689A (en) * | 1943-02-16 | 1949-05-17 | Chase Brass & Copper Co | Process for tin-coating the interiors of copper tubes |
US2516058A (en) * | 1943-09-30 | 1950-07-18 | Bell Telephone Labor Inc | Apparatus for plating of metals |
US2441493A (en) * | 1947-06-10 | 1948-05-11 | Atlantic Refining Co | Desulfurization of hydrocarbons with boron phosphate-alumina catalyst |
US2794448A (en) * | 1949-04-09 | 1957-06-04 | Columbia Cable & Electric Corp | Art of spray coating of tubes |
US2848566A (en) * | 1954-02-01 | 1958-08-19 | Smith Corp A O | Induction heating apparatus for fusing vitreous enamel |
US2908384A (en) * | 1954-03-03 | 1959-10-13 | Babcock & Wilcox Co | Method of applying a particulate lubricant to a tubular extrusion billet |
US3207618A (en) * | 1961-08-03 | 1965-09-21 | Internat Protected Metals Inc | Method and apparatus for applying protective coatings |
US3338795A (en) * | 1964-11-13 | 1967-08-29 | Richard H Mcbee | Culture tube rolling machine |
US3816938A (en) * | 1972-04-06 | 1974-06-18 | E Nikolaevich | Method and device for drying enamel slip on inner surfaces of pipes |
US4089998A (en) * | 1976-07-13 | 1978-05-16 | Gibson Jack Edward | Method of powder coating the interior of tubular goods |
USRE32921E (en) * | 1976-07-13 | 1989-05-09 | GCB, Inc. | Method of powder coating the inside of pipes with a continuous film of plastic material |
FR2523876A1 (en) * | 1982-03-29 | 1983-09-30 | Reznick David | APPARATUS AND METHOD FOR APPLYING A COATING TO A SUBSTRATE WITH VACUUM CURING AND SOLVENT RECOVERY |
US4421781A (en) * | 1982-03-29 | 1983-12-20 | Tri/Valley Growers | Continuous vacuum curing and solvent recovery coating process |
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