US3696503A - Method for continuously galvanizing steel strip - Google Patents

Method for continuously galvanizing steel strip Download PDF

Info

Publication number
US3696503A
US3696503A US871917A US3696503DA US3696503A US 3696503 A US3696503 A US 3696503A US 871917 A US871917 A US 871917A US 3696503D A US3696503D A US 3696503DA US 3696503 A US3696503 A US 3696503A
Authority
US
United States
Prior art keywords
strip
bath
galvanizing
forming
rolls
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
Application number
US871917A
Other languages
English (en)
Inventor
Theodore H Krengel
Arthur E Ostrowski
Anthony J Raymond
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allied Tube and Conduit Corp
Original Assignee
Allied Tube and Conduit Corp
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
Application filed by Allied Tube and Conduit Corp filed Critical Allied Tube and Conduit Corp
Application granted granted Critical
Publication of US3696503A publication Critical patent/US3696503A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/38—Wires; Tubes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49982—Coating
    • Y10T29/49986—Subsequent to metal working

Definitions

  • the disclosure includes the steps of 2,797,476 7/1957 Sendzimu ..29/527.4 forming or partially forming the Strip prior to its entry 2,991,550 7/ 1961 Block ..29/527.4 into the bath 3,068,566 12/1962 Berg ..29/527.4 3,073,019 1 1963
  • the prior art method is necessary because it has not been considered practical to shape strip material either partially or completely in a galvanizing line.
  • One reason is that the length of the line'required for the galvanizingmethods of the prior art are such that the addition of roll forming to the line becomes uneconomical or otherwise not feasible.
  • a further object of this invention is to provide a novel method for the continuous galvanizing of strip steel which may more easily than the prior art be threaded when it is desired to change from one width of strip to another.
  • a still further object of this invention is to provide a novel method for the continuous galvanizing of strip steel which will coat strip material which has been rollformed to a desired shape or has been partially rollformed before galvanizing and may be finish rollformed after galvanizing.
  • a novel method of strip galvanizing which includes the step of moving the strip material in substantially a horizontal plane through a zinc bath.
  • the strip may be processed while flat or partially formed.
  • FIG. '2 is a schematic illustration of a zinc bath struc ture useful in carrying out the method of the invention
  • FIG. 3 is a view along the lines 3--3 of FIG. 2;
  • FIG. 4 is a diagrammatic illustration of forming rolls forming a part of a machine incorporating the invention and useful in carrying out the method thereof;
  • FIG. 5 is an end view of strip material after it has passed through the forming rolls of FIG. 3;
  • FIG. 6 is a diagrammatic illustration of reforming rolls which may form a part of a machine embodying the invention and be useful in carrying out the novel method thereof;
  • FIG. 7 is a diagrammatic illustration of a portion of apparatus which may be used to practice an alternate embodiment of the invention.
  • FIG. 8 is a perspective view of one type of steel strip that may be galvanized in accordance with the invention.
  • FIG. 9A is a perspective view of a partially formed shape which may be galvanized in accordance with the invention.
  • FIG. 9B is a perspective view of the shape that may be formed from the partially formed shape of FIG. 9A after galvanizing.
  • FIG. 1 illustrates a galvanizing machine which is fed with strip steel 2 supplied from a strip reel 4.
  • the machine is arranged as a series of in line stages to operate in a continuous manner for providing a galvanizing coat to all surfaces of the strip material 2.
  • Advancement of the strip 2 is effected primarily by engagement between the strip and the forming rolls rotating at relatively constant speed whereby the strip is drawn into the machine for processing.
  • a loop 10 is taken in the strip 2 and dimensioned to have a length sufficient to continuously feed the strip to the mill while the trailing end 6 of the strip is held stationary for splicing, as by welding, onto the leading edge 8 of a new reel which has been moved into a position for use.
  • the loop 10 may be placed about a roller riding on a carriage in turn riding on a track similar to that shown in the US. Fat. to Krengel et al. No. 3,122,114.
  • a clamp 12 may be provided to hold the end 6 while the end 8 is welded to it by the welder illustrated diagrammatically by reference numeral 14.
  • means 15 may be provided. This may be constituted by a rotary side trimmer which removes a small portion of each edge or scarfing tools on each side which will remove projections from the edges.
  • a slitter prior to forming a slitter may be provided which cuts the strip unwinding from the reel 4 into a plurality of strips, not necessarily of the same width,-
  • the strip in order to galvanize or coat the surface of the strip 2 with zinc in accordance with this invention, is first passed through a series of forming rolls 16 which have a configuration and number sufficient to form the flat strip into an arcuate shape as shown in FIG. 5.
  • the forming rolls may be arranged through the machine in the direction of the arrow 18.
  • a first pair of forming rolls engage the upper and lower surfaces of the strip and are constituted by a bottom roll 20 having a slightly convex shape and an upper roll 22 having a slightly concave shape to begin the deformation of the strip to the desired shape.
  • These rolls are provided to have their axis of rotation extend transversely to the direction of movement of the strip and are rotatable in the direction shown by the arrows on the ends thereof. As noted above, these rolls engaging the upper and lower surfaces of the strip in addition to partially forming it to the desired shape also act to drive or advance the strip through the machine.
  • a second set of transverse rolls comprising a lower convex roll 24 and an upper concave roll 26 may be provided. These rolls would have radii of curvature greater than those of the rolls 20 and 22 in order to further form the strip to the desired arcuate shape. Further forming rolls may be provided by a pair of opposed vertical rolls 28 and 30 driven about axes perpendicular to the axis of rotation of the rolls 20, 22, 24 and 26. These rolls are provided with concave surfaces engaging the lateral edges of the strip 2 forcing it further toward the desired arcuate shape.
  • a similar set of vertical rolls 32 and 34 are provided to engage the lateral edges of the strip in the same manner.
  • the forming stage 16 may also include stock guides 35 consisting of guide rollers engaging the edge and top and bottom of the strip adjacent the edges on both sides thereof and movable inwardly and outwardly as indicated by the arrows. When provided with such stock guides, the roll may by adjustment inwardly or outwardly accommodate strip material of different widths without the necessity to change the forming rolls.
  • the strip 2 has been formed into an arcuate shape having a radius of curvature R.
  • the amount of zinc which will adhere to the surface will be that necessary to obtain a coating that will be strongly bonded to the surface of the strip, have a desired thickness, good coverage of the entire surface and good appearance.
  • R are related to the thickness of the strip, it being important not to exceed a minimum value for a given thickness in order that the strip not be deformed beyond a point where reforming into its flat form is no longer possible.
  • a maximum value of R is determined by the need to a surface curved downwardly sufficient to permit the excess zinc to run off.
  • the strip After being formed to the arcuate shape, the strip is advanced to elements linearly aligned therewith for washing and pickling the surfaces of the strip in preparation for continuous galvanizing.
  • the washing and pickling of the machine may be similar to that disclosed in the US. Pat. to Krengel et al. No. 3,122,114 and comprise a first stage 36 for providing a strong wash of that surface and a second stage 38 for providing a medium wash.
  • these washes may take the form of solutions of alkali in hot water. From the alkali washes the strip is advanced to a rinse stage 40 where it is sprayed with rinse water to remove the alkali from the surface.
  • the strip After rinsing, the strip may be pickled at the stage 42 using a solution of hydrochloric acid. After a water rinse by a stage 44 and a steam rinse by a stage 46, the strip is advanced to the entrance to an inert gas housing 48.
  • the preheat means is illustrated as being constituted by an induction heating device comprising an induction heating coil 50 encompassing the strip and connected to a suitable source of electrical energy (not shown). Also included within the inert gas housing is a bath of molten zinc, a portion of which is in a trough 52 disposed within the housing.
  • suitable means shaped to conform to the surfaces of the strip and engaging therewith may be provided at the exit end of the trough to wipe off the excess zinc as the strip leaves .the housing 48.
  • a water quench as in the form of a water spray or flow coat 54 following substantially after the strip emerges from the housing.
  • the galvanizing strip is advanced sequentially through a series of water spray sections 54 to cool down the galvanized strip if it has not otherwise been sufficiently cooled in the freezing step.
  • the machine will include a series of reforming rolls 56. These reforming rolls may be arranged as shown in FIG. 6. In this figure, there is shown a first pair of transverse rolls 58 and 60 wherein the roll 58 is positioned beneath the strip 2 while the roll 60 is positioned above it. Engaging the surfaces of the strip the rolls have the effect of forcing the arcuately shaped strip back toward its flat configuration. Whatever number of rolls are necessary may be provided and in this figure there is included an additional set of rolls 62 and 64 which are arranged for rotation in the same direction as the rolls 58 and 60 but which have their axis of rotation closer together than the axis of rotation of the rolls 58 and 60.
  • the strip 2 After being reformed into flat strip, the strip 2 may either be cut into desired lengths by a shear 66 or wound on a storage reel 68 depending on the needs and the desires of the user.
  • the strip may be passed through the galvanizing bath flat but with its longitudinal axis tilted slightly from the horizontal. In this manner, a sloping surface for excess run-off may be provided without bending the strip. Roller guides may be provided in lieu of the forming rolls 16 for this purpose.
  • An important concept of this invention resides in the method for continuously galvanizing the strip material as a continuous operation. For this purpose it is desirable to contact the cleaned surface of the strip 2 with molten zinc for a sufficient time to enable the desired reactions to take place to form the desired thickness of galvanize on its surface, and it is important to carry out the reactions under non-oxidizing conditions. Otherwise undesirable oxides of the metal will form at the elevated temperatures under which the reactions are carried out.
  • the desired reducing or non-oxidizing atmosphere can be maintained by the enclosure of the galvanizing zone within a sealed housing into which an inert or reducing gas can be introduced with a maintenance of a non-oxidizing atmosphere.
  • This can be accomplished by a sealed enclosure but it is preferable to make use of an enclosure which is capable of removal to gain access to the interior of the galvanizing zone but without interferring with the ability to achieve atmospheric control when in position of use.
  • FIG. 2 of the drawings The desired characteristics have been achieved in the construction illustrated in FIG. 2 of the drawings by the use of a rectangular hood 68 having a horizontally disposed top wall 70, side and end walls 72 which extend perpendicularly downwardly from the edges of the top wall into a trough 74 facing upwardly from a frame 76 which extends all about the galvanizing zone.
  • the bottom edges 78 of the side walls are received within the trough for support of the hood.
  • the trough is at least partially filled with a material 80 such as fine sand into which the lower edge of the side walls becomes embedded to effect a sealing relationship all around which militates against the flow of free gases all around for atmospheric control.
  • One or more inlets 82 for the inert or reducing gas are provided in the walls of the hood for introduction of such inert or reducing gas in the amounts to maintain a non-oxidizing atmosphere therein.
  • the galvanizing means comprises an elongated horizontally disposed housing 52 in the form of a trough aligned axially with the line of travel of the sheet 2 for passage of the sheet horizontally through an intermediate section of the trough from an inlet 84 at one end and to an outlet 86 at the opposite end.
  • the trough is provided with one or more inlets 88 which are connected by a passage 90 to a reservoir 92 of molten zinc with means for displacement of the molten zinc from the reservoir to the direct the stream or streams of molten zinc onto the strip.
  • the location of the inlet 88 and outlet 86 may be reversed to provide for counter flow of the molten zinc with the moving strip.
  • the trough S2 is further provided with a drain opening 94 in the bottom wall 96 thereof with a downpipe 98 leading from the drain to the reservoir.
  • the drain opening is of small dimension to enable a thin stream of molten zinc constantly to flow therethrough butat a rate that is considerably less thanthe rate of introduction of molten zinc into the trough less the amount that escapes through the openings so that there will be an overflow of molten zinc over the sides of the trough forming the inlet to the trough, but insuring an amount of molten zinc in the trough to coverthe strip passing therethrough. It is preferable to provide that the ends of the trough be higher than the sides in order that the overflow occur at the sides. In this manner, the entry of the strip below the surface of the bath in the trough without its prepared surface having previously been contacted by overflow zinc is insured.
  • a wiper means such as the element 100 may be provided in the outlet 86 to control the thickness of the zinc coating without bead formation and to provide for removal of excess for return to the reservoir while in a molten state and while still in a protective atmosphere.
  • a similar element may be provided in the inlet 84 to engage the surface of the strip. These two elements may be constituted by guide blocks shaped to conform to the surface of the strip and may be constructed out of materials to which molten zinc will not adhere. An alloy of tungsten and aluminum have been found useful for this purpose.
  • conduit provided with outlets to supply a sharp blast of heat encompasses the strip to remove excess zinc and in this manner control the thickness of the zinc coating, provide a luster finish and ensure a uniformity of the coating.
  • the strip 2 enters the bath of molten zinc in the trough 52 below the level of its surface 102. During its passage through the bath, it travels in the same horizontal plane and exits similarly.
  • This method of galvanizing results in a number of advantages. The most important advantage is that a complete high quality coating is obtained on all surfaces including the edges of the strip. As pointed out above, that by so doing it becomes possible to continuously galvanize strip steel normally slit from wide coil stock in thickness greater than 0.036 inches and produce a product which exhibits a resistance to corrosion including rust on all exposed surfaces including edges and the sides of punched holes for periods longer than heretofore possible. In addition, a shiny smooth finish is obtained free of flaws such as wrinkles or spots where the galvanizing is incomplete.
  • a further advantage is that it becomes easier to remove foreign materials which tend to rise to the top of the bath and contaminates which are heavier and fall to the bottom.
  • Other advantages which are obtained include an ability to control the length of the trough 52. Heretofore, this has been done by the use of additional guide rolls in the bath or by providing deeper baths. Further, it becomes easier to put the continuous galvanizing line in operation as there is no longer any need to thread the strip over guide rolls in the bath.
  • the method and apparatus may be used to continuously galvanize flat strip by the use of forming and reforming rolls.
  • FIG. 7 an alternative embodiment is illustrated wherein the strip 2 after leaving the housing 48 and the quenching or cooling stage 54 may pass through a series of forming rolls 102 to be formed to any desired shape such as rectangular sections or angular constructions.
  • a shear l04- may be provided to cut the formed strip to desired lengths.
  • FIG. 8 illustrates a formed strip which may be continuously galvanized using the method and apparatus of this invention.
  • This is a more complex shape and comprises a strip having two curves 108 and 1 10 which may be used for guard rails of the type installed along highways.
  • the machine could include a punch at a point prior to the surface preparation stages to form holes 112 in the trough 1 14 formed by the double curve of such a strip.
  • This punch could be provided prior to the forming stage so that the holes are in the formed strip prior to galvanizing.
  • This arrangement permits excess zinc draining into the rough 114 from the sloping sides of the curves to reenter the bath and yet at the same time the sides of the holes 112 are galvanized so that corrosion protection is thereby provided.
  • prepunched strip could be used when the shape which may be galvanized using the method and apparatus of this invention is illustrated in FIGS. 9A and 9B.
  • FIG. 9B illustrates the desired end product, that is, a rectangular section 116 in which all the exposedsurfaces are galvanized.
  • a shape could be formed by first partially forming the strip material into the angular shape 118 shown in FIG. 9A, and then after surface preparation, passing this shape in the same manner as described above through the galvanizing bath. After galvanizing and cooling, additional forming rolls could complete fabrication of the strip 118 into the rectangular configuration 1 16.
  • a loop such as that shown by the reference numeral 10 in the upstream part of the machine may also be used between the shear 66 and the wind up reel 68 in order to permit continuous operation.
  • the process of such a loop would provide storage for galvanized strip while an empty reel is being exchanged for a reel which has just been filled.
  • a method of continuously galvanizing steel strip comprising the steps of:
  • This invention relates to a method and apparatus for galvanizing strip material. More specifically, it

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Electroplating Methods And Accessories (AREA)
US871917A 1969-10-28 1969-10-28 Method for continuously galvanizing steel strip Expired - Lifetime US3696503A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87191769A 1969-10-28 1969-10-28

Publications (1)

Publication Number Publication Date
US3696503A true US3696503A (en) 1972-10-10

Family

ID=25358438

Family Applications (1)

Application Number Title Priority Date Filing Date
US871917A Expired - Lifetime US3696503A (en) 1969-10-28 1969-10-28 Method for continuously galvanizing steel strip

Country Status (12)

Country Link
US (1) US3696503A (enrdf_load_stackoverflow)
JP (1) JPS515348B1 (enrdf_load_stackoverflow)
BE (1) BE756530A (enrdf_load_stackoverflow)
CA (1) CA922989A (enrdf_load_stackoverflow)
CH (1) CH575012A5 (enrdf_load_stackoverflow)
DE (1) DE2050836C3 (enrdf_load_stackoverflow)
ES (1) ES380617A1 (enrdf_load_stackoverflow)
FR (1) FR2065819A5 (enrdf_load_stackoverflow)
GB (1) GB1327418A (enrdf_load_stackoverflow)
IL (1) IL34578A (enrdf_load_stackoverflow)
NL (1) NL169090C (enrdf_load_stackoverflow)
ZA (1) ZA703639B (enrdf_load_stackoverflow)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082869A (en) * 1976-07-08 1978-04-04 Raymond Anthony J Semi-hot metallic extrusion-coating method
US4124932A (en) * 1977-09-01 1978-11-14 Allied Tube & Conduit Corporation Prequench cooling for galvanized tubing
US4612063A (en) * 1984-07-13 1986-09-16 Acme Fence And Iron Company, Inc. Method of making a fence stretcher bar
US4768280A (en) * 1985-07-31 1988-09-06 Palmer Tube Mills (Aust.) Pty. Ltd. Roll forming of metal articles
US5128172A (en) * 1990-10-12 1992-07-07 Whittick Thomas E Continuous coating process with inductive heating
US5199157A (en) * 1992-01-21 1993-04-06 Adaptive Technology, Inc. Continuous manufacture of formed, plated component parts having selected alternate configurations
US5321896A (en) * 1991-04-18 1994-06-21 Alltrista Corporation Apparatus for coating a metal substrate and for drying and curing said coating
US5471731A (en) * 1993-04-30 1995-12-05 Anchor Hocking Corporation Method of making low-fat non-stick frying device
US6042891A (en) * 1995-07-11 2000-03-28 Tubemakers Of Australia Limited Roll forming structural steel profiles with galvanised coating
US6598287B1 (en) 2002-01-24 2003-07-29 Western Tube & Conduit Corporation Apparatus and method for sizing a galvanized tube
EP1479474A3 (de) * 2003-05-20 2005-11-02 HILTI Aktiengesellschaft Verfahren zur Verzinkung eines metallischen Flachmaterials
WO2009076625A1 (en) * 2007-12-12 2009-06-18 Allied Tube & Conduit Corporation Arching metallic profiles in continuous in-line process
US20100266783A1 (en) * 2009-04-15 2010-10-21 Hot Dip Solutions, Llc Method of coating a substrate
WO2012083345A1 (en) * 2010-12-22 2012-06-28 Australian Tube Mills Pty Limited Control of coating of members
US20120280535A1 (en) * 2011-05-04 2012-11-08 GM Global Technology Operations LLC System and method for manufacturing magnesium body panels with improved corrosion resistance
US20140272433A1 (en) * 2013-03-15 2014-09-18 Henkel Ag & Co. Kgaa Inorganic composite coatings comprising novel functionalized acrylics

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5834405U (ja) * 1981-08-27 1983-03-05 株式会社ヨコオ ル−プアンテナ装置
FR2534161B1 (fr) * 1982-10-06 1985-08-30 Maubeuge Fer Procede et dispositif de production en continu d'une bande metallique galvanisee et profilee
DE19543804B4 (de) * 1995-11-24 2004-02-05 Salzgitter Ag Verfahren zur Herstellung von feuerverzinktem Stahlband und damit hergestelltes feuerverzinktes Blech oder Band aus Stahl

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2797476A (en) * 1952-06-17 1957-07-02 Sendzimir Tadeusz Process and apparatus for treating metallic strips
US2991550A (en) * 1956-05-25 1961-07-11 American Mach & Foundry Metal foil coated with dielectric material and method of forming
US3068566A (en) * 1958-09-19 1962-12-18 Berg Quentin Method of solder coating strip stock
US3073019A (en) * 1958-06-16 1963-01-15 Gen Motors Corp Method of making coated tubing
US3188734A (en) * 1961-10-30 1965-06-15 United States Steel Corp Method of making container stock
US3224088A (en) * 1961-11-15 1965-12-21 Inland Steel Co Process for producing multi-layer metallic material
US3284892A (en) * 1963-09-25 1966-11-15 Anaconda American Brass Co Wire processing
US3295199A (en) * 1961-10-19 1967-01-03 Inland Steel Co Process of making soft, ductile, galvanized material
US3383293A (en) * 1967-03-03 1968-05-14 Plastic Clad Metal Products In Processes for drawing and coating metal substrates
US3559280A (en) * 1968-03-13 1971-02-02 Allied Tube & Conduit Corp Method and apparatus for the continuous forming, galvanizing and coloring of tubing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3122114A (en) * 1961-05-01 1964-02-25 Allied Tube & Conduit Corp Continuous tube forming and galvanizing

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2797476A (en) * 1952-06-17 1957-07-02 Sendzimir Tadeusz Process and apparatus for treating metallic strips
US2991550A (en) * 1956-05-25 1961-07-11 American Mach & Foundry Metal foil coated with dielectric material and method of forming
US3073019A (en) * 1958-06-16 1963-01-15 Gen Motors Corp Method of making coated tubing
US3068566A (en) * 1958-09-19 1962-12-18 Berg Quentin Method of solder coating strip stock
US3295199A (en) * 1961-10-19 1967-01-03 Inland Steel Co Process of making soft, ductile, galvanized material
US3188734A (en) * 1961-10-30 1965-06-15 United States Steel Corp Method of making container stock
US3224088A (en) * 1961-11-15 1965-12-21 Inland Steel Co Process for producing multi-layer metallic material
US3284892A (en) * 1963-09-25 1966-11-15 Anaconda American Brass Co Wire processing
US3383293A (en) * 1967-03-03 1968-05-14 Plastic Clad Metal Products In Processes for drawing and coating metal substrates
US3559280A (en) * 1968-03-13 1971-02-02 Allied Tube & Conduit Corp Method and apparatus for the continuous forming, galvanizing and coloring of tubing

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082869A (en) * 1976-07-08 1978-04-04 Raymond Anthony J Semi-hot metallic extrusion-coating method
US4124932A (en) * 1977-09-01 1978-11-14 Allied Tube & Conduit Corporation Prequench cooling for galvanized tubing
US4612063A (en) * 1984-07-13 1986-09-16 Acme Fence And Iron Company, Inc. Method of making a fence stretcher bar
US4768280A (en) * 1985-07-31 1988-09-06 Palmer Tube Mills (Aust.) Pty. Ltd. Roll forming of metal articles
EP0232331A4 (en) * 1985-07-31 1989-03-14 Ross Leslie Palmer ROLLS OF METAL STRIP.
US5128172A (en) * 1990-10-12 1992-07-07 Whittick Thomas E Continuous coating process with inductive heating
US5321896A (en) * 1991-04-18 1994-06-21 Alltrista Corporation Apparatus for coating a metal substrate and for drying and curing said coating
US5325601A (en) * 1991-04-18 1994-07-05 Alltrista Corporation Method for drying and curing a coated metal substrate
US5199157A (en) * 1992-01-21 1993-04-06 Adaptive Technology, Inc. Continuous manufacture of formed, plated component parts having selected alternate configurations
US5471731A (en) * 1993-04-30 1995-12-05 Anchor Hocking Corporation Method of making low-fat non-stick frying device
US6042891A (en) * 1995-07-11 2000-03-28 Tubemakers Of Australia Limited Roll forming structural steel profiles with galvanised coating
US6598287B1 (en) 2002-01-24 2003-07-29 Western Tube & Conduit Corporation Apparatus and method for sizing a galvanized tube
EP1479474A3 (de) * 2003-05-20 2005-11-02 HILTI Aktiengesellschaft Verfahren zur Verzinkung eines metallischen Flachmaterials
WO2009076625A1 (en) * 2007-12-12 2009-06-18 Allied Tube & Conduit Corporation Arching metallic profiles in continuous in-line process
US20100266783A1 (en) * 2009-04-15 2010-10-21 Hot Dip Solutions, Llc Method of coating a substrate
WO2012083345A1 (en) * 2010-12-22 2012-06-28 Australian Tube Mills Pty Limited Control of coating of members
AU2011349108B2 (en) * 2010-12-22 2015-09-17 Austube Mills Pty Ltd Control of coating of members
US20120280535A1 (en) * 2011-05-04 2012-11-08 GM Global Technology Operations LLC System and method for manufacturing magnesium body panels with improved corrosion resistance
US8866044B2 (en) * 2011-05-04 2014-10-21 GM Global Technology Operations LLC System and method for manufacturing magnesium body panels with improved corrosion resistance
US20140272433A1 (en) * 2013-03-15 2014-09-18 Henkel Ag & Co. Kgaa Inorganic composite coatings comprising novel functionalized acrylics
US9963786B2 (en) * 2013-03-15 2018-05-08 Henkel Ag & Co. Kgaa Inorganic composite coatings comprising novel functionalized acrylics

Also Published As

Publication number Publication date
IL34578A (en) 1973-05-31
NL169090C (nl) 1982-06-01
ES380617A1 (es) 1972-10-16
CA922989A (en) 1973-03-20
NL7011025A (enrdf_load_stackoverflow) 1971-05-03
FR2065819A5 (enrdf_load_stackoverflow) 1971-08-06
ZA703639B (en) 1971-01-27
JPS515348B1 (enrdf_load_stackoverflow) 1976-02-19
DE2050836C3 (de) 1978-12-14
NL169090B (nl) 1982-01-04
DE2050836B2 (de) 1978-04-20
DE2050836A1 (de) 1971-05-13
IL34578A0 (en) 1970-07-19
GB1327418A (en) 1973-08-22
CH575012A5 (enrdf_load_stackoverflow) 1976-04-30
BE756530A (fr) 1971-03-01

Similar Documents

Publication Publication Date Title
US3696503A (en) Method for continuously galvanizing steel strip
US5879465A (en) Method and apparatus for descaling hot rolled stainless steel strip
US3122114A (en) Continuous tube forming and galvanizing
US3259148A (en) Galvanized steel tubing
KR100207836B1 (ko) 금속 코일 연속 제조 장치 및 금속 코일 제조 방법
US5732874A (en) Method of forming seamed metal tube
US4444814A (en) Finishing method and means for conventional hot-dip coating of a ferrous base metal strip with a molten coating metal using conventional finishing rolls
US5412966A (en) Push-pull pickle line
US3927816A (en) Hot dipped steel tube and a method for producing the same
DE2720084C3 (de) Verfahren zur Herstellung von einseitig mit Zink beschichteten Eisenmetallbändern
US5035042A (en) Method for producing galvanized tubing
US3845540A (en) Hot galvanizing process and apparatus
US3561096A (en) Method of continuous tube forming and galvanizing
US3256592A (en) Continuous tube forming and galvanizing
US2309745A (en) Method of processing wire
US4124932A (en) Prequench cooling for galvanized tubing
US3375805A (en) Combined doctor means
US5113557A (en) Apparatus for producing galvanized tubing
JP5386772B2 (ja) 合金化溶融亜鉛メッキ鋼帯の製造方法
JPS5992104A (ja) 冷間圧延用鋼帯の処理方法およびその装置
CA2037331C (en) Apparatus for cooling a traveling strip
AU703836B2 (en) Equipment for continuously manufacturing metal coils and metal coil manufacturing method
KR20220027542A (ko) 아연도금조의 드로스 제거 장치 및 이를 포함하는 용융아연 도금 설비
US2740729A (en) Process for coating sheet metal strip
EP0665902A1 (en) Method of manufacturing galvanised open or closed steel sections