[go: up one dir, main page]

US3685484A - Apparatus for removing excess coating material from strip edges - Google Patents

Apparatus for removing excess coating material from strip edges Download PDF

Info

Publication number
US3685484A
US3685484A US117987A US3685484DA US3685484A US 3685484 A US3685484 A US 3685484A US 117987 A US117987 A US 117987A US 3685484D A US3685484D A US 3685484DA US 3685484 A US3685484 A US 3685484A
Authority
US
United States
Prior art keywords
substrate
wiper
edge
coating material
vessel
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
US117987A
Other languages
English (en)
Inventor
Robert W Patterson
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.)
United States Steel Corp
Original Assignee
United States Steel 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 United States Steel Corp filed Critical United States Steel Corp
Application granted granted Critical
Publication of US3685484A publication Critical patent/US3685484A/en
Assigned to USX CORPORATION, A CORP. OF DE reassignment USX CORPORATION, A CORP. OF DE MERGER (SEE DOCUMENT FOR DETAILS). Assignors: UNITED STATES STEEL CORPORATION (MERGED INTO)
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
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • C23C2/18—Removing excess of molten coatings from elongated material
    • C23C2/20—Strips; Plates

Definitions

  • An edge wiper for removing excess coating mnterinl from a coated strip in a slow speed coating operation in which the coating weight control is effected by an air knife includes means for vertical adjustment, a lever arm pivotally supported and associated with a counterweight to provide a biasing force, and means to transversely adjust the pivot support.
  • Air knives are used to control the weight and distribution of a coating applied in hot dip coating operations, such as the galvanizing of steel strip. Air or a fluid under pressure is directed against the face of a coated substrate as it emerges vertically from a bath of molten coating material. This acts as a squeegee, removing excess coating material and causing it to flow back down the strip into the bath.
  • the air jets may be horizontal but are generally inclined downwardly from 5 to 45 from the horizontal with about 20 to 25' being preferred for slow speed lines.
  • Air knives such as shown in my US. Pat. No. 3,406,656, tend to avoid build-up of the coating metal at the edges of the substrate when the substrate travels at relatively high speeds.
  • whiskers are formed which adhere to each edge of the substrate. This is a particularly undesirable condition. Besides presenting a very unappealing appearance, whiskers cause safety and handling problems and can cause coiling difficulties. Further, the cost of production is increased by loss of coating material as whiskers.
  • FIG. 1 is a diagrammatic elevation view of a hot dip coating apparatus with parts broken away.
  • FIG. 2 is an isometric view of a coated steel strip passing between air knives and mechanical edge wipers.
  • a strip enters a vessel 11 containing coating material 12 which in the galvanizing process is molten zinc, passes around a sinker roll 13 and moves upwardly between a pair of oppositelydisposed air knives 14 and is being contacted at its edges by wipers 16.
  • the portion of the wiper in contact with the strip edge is A-shaped (FIG. 2).
  • the cross bar 17 of the A actually contacts the strip while the legs 18 prevent the wiper from slipping off the strip edge.
  • the wiper has an extended handle 20 which is adjustably positioned in tubular holder 21 and is retained therein by set screw 22.
  • Afiixed to holder 21 is an arm 24 which is carried by a support rod or axle 25 having integral retaining discs 26 at its ends.
  • the edge wiper is positioned by placing the support rod 25 in a pair of toothed racks 27, only one of which is shown.
  • a counterweight 28 is hung on a notch 29 in the arm to maintain sufficient bearing pressure of the wiper against the jet.
  • the wiping is accomplished while the zinc is still in the molten state and not after it becomes solidified. If the wiper is closer than 25 inch from the air jet, the airis turbulent and interferes with the wiping action.
  • the position of the edge wiper may be adjusted vertically by use of set screw 22 and horizontally to accommodate various widths of strip by repositioning the support rod 25 in the toothed rack 27.
  • Edge wipers for removing excess coating material from strip edges are known. However, when an air knife is used, the vertical distance in which the wiper must operate is confined to about 4 inches, that being the distance between the bath and the air knife. Previous wipers, such as shown in LeCroy US. Pat. No. 3,536,038 do not have the necessary compactness to operate in this location.
  • an apparatus for applying a coating to a moving substrate which includes a vessel for containing liquid coating material, means mounted internal to said vessel and external to said vessel for conducting said substrate through said coating material, and a fluid nozzle mounted above said vessel and adapted to direct a fluid jet toward said substrate for controlling the weight and distribution of the coating, the combination therewith of an apparatus for removing excess coating material from the edges of said substrate, said apparatus comprising a wiper adapted to contact the edge of a moving substrate beneath the point of impact of said fluid jet from said fluid nozzle, and means for vertically and transversely adjusting and maintaining said wiper in beating relation against the edge of said substrate,
  • said last-named means comprising:
  • a rod element integral with said wiper lying in the plane of said substrate extended, and extending vertically through a tubular holder member having locking means therewith whereby to vertically adjust said wiper;
  • a lever arm extending generally horizontally from said holder member in the direction away from the substrate and pivoted about a shaft extending through an intermediate section of said arm and a counter-weight adjustably supported on the free portion of said arm whereby to adjustably bias the wiper with respect to said substrate edge; and Y rail means including pairs of complementary notches therein adapted to support said shaft therebetween and whereby, through selection of appropriate notch ,supports, the total assemblage of shaft, lever arm and wiper may be adjusted in the direction normal to said edge.

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)
  • Coating Apparatus (AREA)
US117987A 1971-02-23 1971-02-23 Apparatus for removing excess coating material from strip edges Expired - Lifetime US3685484A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11798771A 1971-02-23 1971-02-23

Publications (1)

Publication Number Publication Date
US3685484A true US3685484A (en) 1972-08-22

Family

ID=22375881

Family Applications (1)

Application Number Title Priority Date Filing Date
US117987A Expired - Lifetime US3685484A (en) 1971-02-23 1971-02-23 Apparatus for removing excess coating material from strip edges

Country Status (18)

Country Link
US (1) US3685484A (es)
JP (1) JPS5618669B1 (es)
AT (1) AT311146B (es)
AU (1) AU470124B2 (es)
BE (1) BE779637A (es)
BG (1) BG19197A3 (es)
BR (1) BR7200943D0 (es)
CA (1) CA972231A (es)
CS (1) CS164919B2 (es)
DE (1) DE2207761A1 (es)
ES (1) ES400067A1 (es)
FR (1) FR2126325B1 (es)
GB (1) GB1381980A (es)
IT (1) IT949176B (es)
NL (1) NL7201978A (es)
PL (1) PL81832B1 (es)
RO (1) RO63596A (es)
ZA (1) ZA72924B (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0778120A1 (en) * 1995-12-05 1997-06-11 Tokai Kogyo Kabushiki Kaisha Extrusion moulding machine
CN106939398A (zh) * 2017-05-04 2017-07-11 西安泰力松新材料股份有限公司 一种金属丝镀锡工艺及其镀锡装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185066U (ja) * 1984-05-18 1985-12-07 ダイハツ工業株式会社 デイストリビユ−タ用カツプリング

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US285043A (en) * 1883-09-18 Sanford w
US2888901A (en) * 1957-10-17 1959-06-02 Bethlehem Steel Corp Coating control apparatus
US2894856A (en) * 1956-08-31 1959-07-14 Inland Steel Co Apparatus for and method of controlling the coating thickness in continuous galvanizing
US3140960A (en) * 1961-06-28 1964-07-14 Inland Steel Co Edge scraping apparatus
US3149988A (en) * 1962-02-23 1964-09-22 Magee Carpet Co Apparatus and method for applying a thermoplastic coating to the backing of carpet
US3375805A (en) * 1965-09-02 1968-04-02 United States Steel Corp Combined doctor means
US3499418A (en) * 1966-12-01 1970-03-10 Nat Steel Corp Continuous metallic strip hot-dip metal coating apparatus
US3536038A (en) * 1968-11-27 1970-10-27 United States Steel Corp Apparatus for removing excess coating material from strip edges

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480469A (en) * 1967-01-19 1969-11-25 Bethlehem Steel Corp Air knife and vacuum doctoring
US3525116A (en) * 1969-03-12 1970-08-25 Bethlehem Steel Corp Air knife and vacuum doctoring apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US285043A (en) * 1883-09-18 Sanford w
US2894856A (en) * 1956-08-31 1959-07-14 Inland Steel Co Apparatus for and method of controlling the coating thickness in continuous galvanizing
US2888901A (en) * 1957-10-17 1959-06-02 Bethlehem Steel Corp Coating control apparatus
US3140960A (en) * 1961-06-28 1964-07-14 Inland Steel Co Edge scraping apparatus
US3149988A (en) * 1962-02-23 1964-09-22 Magee Carpet Co Apparatus and method for applying a thermoplastic coating to the backing of carpet
US3375805A (en) * 1965-09-02 1968-04-02 United States Steel Corp Combined doctor means
US3499418A (en) * 1966-12-01 1970-03-10 Nat Steel Corp Continuous metallic strip hot-dip metal coating apparatus
US3536038A (en) * 1968-11-27 1970-10-27 United States Steel Corp Apparatus for removing excess coating material from strip edges

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0778120A1 (en) * 1995-12-05 1997-06-11 Tokai Kogyo Kabushiki Kaisha Extrusion moulding machine
US5744172A (en) * 1995-12-05 1998-04-28 Tokai Kogyo Kabushiki Kaisha Extrusion molding machine
CN106939398A (zh) * 2017-05-04 2017-07-11 西安泰力松新材料股份有限公司 一种金属丝镀锡工艺及其镀锡装置

Also Published As

Publication number Publication date
JPS5618669B1 (es) 1981-04-30
RO63596A (fr) 1978-08-15
AU470124B2 (en) 1973-08-23
GB1381980A (en) 1975-01-29
ES400067A1 (es) 1975-06-16
BR7200943D0 (pt) 1973-05-10
FR2126325B1 (es) 1977-01-07
CS164919B2 (es) 1975-11-28
BE779637A (fr) 1972-08-21
IT949176B (it) 1973-06-11
DE2207761A1 (de) 1972-09-14
NL7201978A (es) 1972-08-25
ZA72924B (en) 1972-12-27
AT311146B (de) 1973-10-25
AU3903072A (en) 1973-08-23
FR2126325A1 (es) 1972-10-06
BG19197A3 (bg) 1975-04-30
CA972231A (en) 1975-08-05
PL81832B1 (es) 1975-10-31

Similar Documents

Publication Publication Date Title
US3917888A (en) Coating control
US3685484A (en) Apparatus for removing excess coating material from strip edges
US3526204A (en) Edge thickness control for liquid coating operation
US3881040A (en) Method for removing excess coating material from strip edges
US3082119A (en) Method of and apparatus for hot-dip coating strands
US2894856A (en) Apparatus for and method of controlling the coating thickness in continuous galvanizing
US3428023A (en) Quenching zinc metal coatings with atomised water spray
US3406656A (en) Apparatus for controlling coating thickness
US3670695A (en) Apparatus for controlling weight and distribution of a coating
US4374873A (en) Process and installation for coating a metallic strip continuously with a covering layer
US2093857A (en) Method and apparatus for hot galvanizing iron or steel articles
US3148080A (en) Metal coating process and apparatus
US5057337A (en) Method and apparatus for solder coating of leads
US4239817A (en) Process and apparatus for coating one side of a metal strip with molten metal
US4858554A (en) Solder coating apparatus
US4137347A (en) Metallic coating method
US3375805A (en) Combined doctor means
US4207831A (en) Apparatus for one side coating of a continuous strip
US2354459A (en) Immersion means
US2357963A (en) Roll wiper
JPH05185135A (ja) 引抜きワイヤの前処理方法
US3662709A (en) Apparatus for coating the inside of a cylindrical member
US3988517A (en) Gas knife process for controlling hot-dip aluminum coatings
JPS5911662B2 (ja) ストリツプの振動防止方法
JP2820856B2 (ja) 連続溶融金属めっき設備におけるストリップの反り矯正装置及び矯正方法

Legal Events

Date Code Title Description
AS Assignment

Owner name: USX CORPORATION, A CORP. OF DE, STATELESS

Free format text: MERGER;ASSIGNOR:UNITED STATES STEEL CORPORATION (MERGED INTO);REEL/FRAME:005060/0960

Effective date: 19880112